]> git.sur5r.net Git - u-boot/commitdiff
Rename hush to cli_hush
authorSimon Glass <sjg@chromium.org>
Fri, 11 Apr 2014 02:01:24 +0000 (20:01 -0600)
committerTom Rini <trini@ti.com>
Thu, 29 May 2014 21:45:31 +0000 (17:45 -0400)
Hush is a command-line interpreter, so rename it to make that clearer.

Signed-off-by: Simon Glass <sjg@chromium.org>
board/keymile/common/common.c
board/keymile/common/ivm.c
common/Makefile
common/cli_hush.c [new file with mode: 0644]
common/hush.c [deleted file]
common/main.c
include/cli_hush.h [new file with mode: 0644]
include/hush.h [deleted file]

index f941e44e833b860933085e67194ac7f57d572548..2ddb3da38f35f7245551bd66ebbffabd71f59420 100644 (file)
@@ -12,7 +12,7 @@
 #include <ioports.h>
 #include <command.h>
 #include <malloc.h>
-#include <hush.h>
+#include <cli_hush.h>
 #include <net.h>
 #include <netdev.h>
 #include <asm/io.h>
index f0e91bbdfe4f310aae832f1924f2a7094e20fc95..bffc08be951e0a7c4cdec47f47c8cc48558c0852 100644 (file)
@@ -6,7 +6,7 @@
  */
 
 #include <common.h>
-#include <hush.h>
+#include <cli_hush.h>
 #include <i2c.h>
 #include "common.h"
 
index 219cb51b2d70c956b11a6666687dfe019d948490..da184a8dc150c1aa40313ee14cae75399b739bab 100644 (file)
@@ -11,7 +11,7 @@ obj-y += main.o
 obj-y += command.o
 obj-y += exports.o
 obj-y += hash.o
-obj-$(CONFIG_SYS_HUSH_PARSER) += hush.o
+obj-$(CONFIG_SYS_HUSH_PARSER) += cli_hush.o
 obj-y += s_record.o
 obj-y += xyzModem.o
 obj-y += cmd_disk.o
diff --git a/common/cli_hush.c b/common/cli_hush.c
new file mode 100644 (file)
index 0000000..012004a
--- /dev/null
@@ -0,0 +1,3687 @@
+/*
+ * sh.c -- a prototype Bourne shell grammar parser
+ *      Intended to follow the original Thompson and Ritchie
+ *      "small and simple is beautiful" philosophy, which
+ *      incidentally is a good match to today's BusyBox.
+ *
+ * Copyright (C) 2000,2001  Larry Doolittle  <larry@doolittle.boa.org>
+ *
+ * Credits:
+ *      The parser routines proper are all original material, first
+ *      written Dec 2000 and Jan 2001 by Larry Doolittle.
+ *      The execution engine, the builtins, and much of the underlying
+ *      support has been adapted from busybox-0.49pre's lash,
+ *      which is Copyright (C) 2000 by Lineo, Inc., and
+ *      written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
+ *      That, in turn, is based in part on ladsh.c, by Michael K. Johnson and
+ *      Erik W. Troan, which they placed in the public domain.  I don't know
+ *      how much of the Johnson/Troan code has survived the repeated rewrites.
+ * Other credits:
+ *      b_addchr() derived from similar w_addchar function in glibc-2.2
+ *      setup_redirect(), redirect_opt_num(), and big chunks of main()
+ *        and many builtins derived from contributions by Erik Andersen
+ *      miscellaneous bugfixes from Matt Kraai
+ *
+ * There are two big (and related) architecture differences between
+ * this parser and the lash parser.  One is that this version is
+ * actually designed from the ground up to understand nearly all
+ * of the Bourne grammar.  The second, consequential change is that
+ * the parser and input reader have been turned inside out.  Now,
+ * the parser is in control, and asks for input as needed.  The old
+ * way had the input reader in control, and it asked for parsing to
+ * take place as needed.  The new way makes it much easier to properly
+ * handle the recursion implicit in the various substitutions, especially
+ * across continuation lines.
+ *
+ * Bash grammar not implemented: (how many of these were in original sh?)
+ *      $@ (those sure look like weird quoting rules)
+ *      $_
+ *      ! negation operator for pipes
+ *      &> and >& redirection of stdout+stderr
+ *      Brace Expansion
+ *      Tilde Expansion
+ *      fancy forms of Parameter Expansion
+ *      aliases
+ *      Arithmetic Expansion
+ *      <(list) and >(list) Process Substitution
+ *      reserved words: case, esac, select, function
+ *      Here Documents ( << word )
+ *      Functions
+ * Major bugs:
+ *      job handling woefully incomplete and buggy
+ *      reserved word execution woefully incomplete and buggy
+ * to-do:
+ *      port selected bugfixes from post-0.49 busybox lash - done?
+ *      finish implementing reserved words: for, while, until, do, done
+ *      change { and } from special chars to reserved words
+ *      builtins: break, continue, eval, return, set, trap, ulimit
+ *      test magic exec
+ *      handle children going into background
+ *      clean up recognition of null pipes
+ *      check setting of global_argc and global_argv
+ *      control-C handling, probably with longjmp
+ *      follow IFS rules more precisely, including update semantics
+ *      figure out what to do with backslash-newline
+ *      explain why we use signal instead of sigaction
+ *      propagate syntax errors, die on resource errors?
+ *      continuation lines, both explicit and implicit - done?
+ *      memory leak finding and plugging - done?
+ *      more testing, especially quoting rules and redirection
+ *      document how quoting rules not precisely followed for variable assignments
+ *      maybe change map[] to use 2-bit entries
+ *      (eventually) remove all the printf's
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#define __U_BOOT__
+#ifdef __U_BOOT__
+#include <malloc.h>         /* malloc, free, realloc*/
+#include <linux/ctype.h>    /* isalpha, isdigit */
+#include <common.h>        /* readline */
+#include <cli_hush.h>
+#include <command.h>        /* find_cmd */
+#ifndef CONFIG_SYS_PROMPT_HUSH_PS2
+#define CONFIG_SYS_PROMPT_HUSH_PS2     "> "
+#endif
+#endif
+#ifndef __U_BOOT__
+#include <ctype.h>     /* isalpha, isdigit */
+#include <unistd.h>    /* getpid */
+#include <stdlib.h>    /* getenv, atoi */
+#include <string.h>    /* strchr */
+#include <stdio.h>     /* popen etc. */
+#include <glob.h>      /* glob, of course */
+#include <stdarg.h>    /* va_list */
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>    /* should be pretty obvious */
+
+#include <sys/stat.h>  /* ulimit */
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+/* #include <dmalloc.h> */
+
+#if 1
+#include "busybox.h"
+#include "cmdedit.h"
+#else
+#define applet_name "hush"
+#include "standalone.h"
+#define hush_main main
+#undef CONFIG_FEATURE_SH_FANCY_PROMPT
+#define BB_BANNER
+#endif
+#endif
+#define SPECIAL_VAR_SYMBOL 03
+#define SUBSTED_VAR_SYMBOL 04
+#ifndef __U_BOOT__
+#define FLAG_EXIT_FROM_LOOP 1
+#define FLAG_PARSE_SEMICOLON (1 << 1)          /* symbol ';' is special for parser */
+#define FLAG_REPARSING       (1 << 2)          /* >= 2nd pass */
+
+#endif
+
+#ifdef __U_BOOT__
+DECLARE_GLOBAL_DATA_PTR;
+
+#define EXIT_SUCCESS 0
+#define EOF -1
+#define syntax() syntax_err()
+#define xstrdup strdup
+#define error_msg printf
+#else
+typedef enum {
+       REDIRECT_INPUT     = 1,
+       REDIRECT_OVERWRITE = 2,
+       REDIRECT_APPEND    = 3,
+       REDIRECT_HEREIS    = 4,
+       REDIRECT_IO        = 5
+} redir_type;
+
+/* The descrip member of this structure is only used to make debugging
+ * output pretty */
+struct {int mode; int default_fd; char *descrip;} redir_table[] = {
+       { 0,                         0, "()" },
+       { O_RDONLY,                  0, "<"  },
+       { O_CREAT|O_TRUNC|O_WRONLY,  1, ">"  },
+       { O_CREAT|O_APPEND|O_WRONLY, 1, ">>" },
+       { O_RDONLY,                 -1, "<<" },
+       { O_RDWR,                    1, "<>" }
+};
+#endif
+
+typedef enum {
+       PIPE_SEQ = 1,
+       PIPE_AND = 2,
+       PIPE_OR  = 3,
+       PIPE_BG  = 4,
+} pipe_style;
+
+/* might eventually control execution */
+typedef enum {
+       RES_NONE  = 0,
+       RES_IF    = 1,
+       RES_THEN  = 2,
+       RES_ELIF  = 3,
+       RES_ELSE  = 4,
+       RES_FI    = 5,
+       RES_FOR   = 6,
+       RES_WHILE = 7,
+       RES_UNTIL = 8,
+       RES_DO    = 9,
+       RES_DONE  = 10,
+       RES_XXXX  = 11,
+       RES_IN    = 12,
+       RES_SNTX  = 13
+} reserved_style;
+#define FLAG_END   (1<<RES_NONE)
+#define FLAG_IF    (1<<RES_IF)
+#define FLAG_THEN  (1<<RES_THEN)
+#define FLAG_ELIF  (1<<RES_ELIF)
+#define FLAG_ELSE  (1<<RES_ELSE)
+#define FLAG_FI    (1<<RES_FI)
+#define FLAG_FOR   (1<<RES_FOR)
+#define FLAG_WHILE (1<<RES_WHILE)
+#define FLAG_UNTIL (1<<RES_UNTIL)
+#define FLAG_DO    (1<<RES_DO)
+#define FLAG_DONE  (1<<RES_DONE)
+#define FLAG_IN    (1<<RES_IN)
+#define FLAG_START (1<<RES_XXXX)
+
+/* This holds pointers to the various results of parsing */
+struct p_context {
+       struct child_prog *child;
+       struct pipe *list_head;
+       struct pipe *pipe;
+#ifndef __U_BOOT__
+       struct redir_struct *pending_redirect;
+#endif
+       reserved_style w;
+       int old_flag;                           /* for figuring out valid reserved words */
+       struct p_context *stack;
+       int type;                       /* define type of parser : ";$" common or special symbol */
+       /* How about quoting status? */
+};
+
+#ifndef __U_BOOT__
+struct redir_struct {
+       redir_type type;                        /* type of redirection */
+       int fd;                                         /* file descriptor being redirected */
+       int dup;                                        /* -1, or file descriptor being duplicated */
+       struct redir_struct *next;      /* pointer to the next redirect in the list */
+       glob_t word;                            /* *word.gl_pathv is the filename */
+};
+#endif
+
+struct child_prog {
+#ifndef __U_BOOT__
+       pid_t pid;                                      /* 0 if exited */
+#endif
+       char **argv;                            /* program name and arguments */
+       /* was quoted when parsed; copy of struct o_string.nonnull field */
+       int *argv_nonnull;
+#ifdef __U_BOOT__
+       int    argc;                            /* number of program arguments */
+#endif
+       struct pipe *group;                     /* if non-NULL, first in group or subshell */
+#ifndef __U_BOOT__
+       int subshell;                           /* flag, non-zero if group must be forked */
+       struct redir_struct *redirects; /* I/O redirections */
+       glob_t glob_result;                     /* result of parameter globbing */
+       int is_stopped;                         /* is the program currently running? */
+       struct pipe *family;            /* pointer back to the child's parent pipe */
+#endif
+       int sp;                         /* number of SPECIAL_VAR_SYMBOL */
+       int type;
+};
+
+struct pipe {
+#ifndef __U_BOOT__
+       int jobid;                                      /* job number */
+#endif
+       int num_progs;                          /* total number of programs in job */
+#ifndef __U_BOOT__
+       int running_progs;                      /* number of programs running */
+       char *text;                                     /* name of job */
+       char *cmdbuf;                           /* buffer various argv's point into */
+       pid_t pgrp;                                     /* process group ID for the job */
+#endif
+       struct child_prog *progs;       /* array of commands in pipe */
+       struct pipe *next;                      /* to track background commands */
+#ifndef __U_BOOT__
+       int stopped_progs;                      /* number of programs alive, but stopped */
+       int job_context;                        /* bitmask defining current context */
+#endif
+       pipe_style followup;            /* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */
+       reserved_style r_mode;          /* supports if, for, while, until */
+};
+
+#ifndef __U_BOOT__
+struct close_me {
+       int fd;
+       struct close_me *next;
+};
+#endif
+
+struct variables {
+       char *name;
+       char *value;
+       int flg_export;
+       int flg_read_only;
+       struct variables *next;
+};
+
+/* globals, connect us to the outside world
+ * the first three support $?, $#, and $1 */
+#ifndef __U_BOOT__
+char **global_argv;
+unsigned int global_argc;
+#endif
+static unsigned int last_return_code;
+#ifndef __U_BOOT__
+extern char **environ; /* This is in <unistd.h>, but protected with __USE_GNU */
+#endif
+
+/* "globals" within this file */
+static uchar *ifs;
+static char map[256];
+#ifndef __U_BOOT__
+static int fake_mode;
+static int interactive;
+static struct close_me *close_me_head;
+static const char *cwd;
+static struct pipe *job_list;
+static unsigned int last_bg_pid;
+static unsigned int last_jobid;
+static unsigned int shell_terminal;
+static char *PS1;
+static char *PS2;
+struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
+struct variables *top_vars = &shell_ver;
+#else
+static int flag_repeat = 0;
+static int do_repeat = 0;
+static struct variables *top_vars = NULL ;
+#endif /*__U_BOOT__ */
+
+#define B_CHUNK (100)
+#define B_NOSPAC 1
+
+typedef struct {
+       char *data;
+       int length;
+       int maxlen;
+       int quote;
+       int nonnull;
+} o_string;
+#define NULL_O_STRING {NULL,0,0,0,0}
+/* used for initialization:
+       o_string foo = NULL_O_STRING; */
+
+/* I can almost use ordinary FILE *.  Is open_memstream() universally
+ * available?  Where is it documented? */
+struct in_str {
+       const char *p;
+#ifndef __U_BOOT__
+       char peek_buf[2];
+#endif
+       int __promptme;
+       int promptmode;
+#ifndef __U_BOOT__
+       FILE *file;
+#endif
+       int (*get) (struct in_str *);
+       int (*peek) (struct in_str *);
+};
+#define b_getch(input) ((input)->get(input))
+#define b_peek(input) ((input)->peek(input))
+
+#ifndef __U_BOOT__
+#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
+
+struct built_in_command {
+       char *cmd;                                      /* name */
+       char *descr;                            /* description */
+       int (*function) (struct child_prog *);  /* function ptr */
+};
+#endif
+
+/* define DEBUG_SHELL for debugging output (obviously ;-)) */
+#if 0
+#define DEBUG_SHELL
+#endif
+
+/* This should be in utility.c */
+#ifdef DEBUG_SHELL
+#ifndef __U_BOOT__
+static void debug_printf(const char *format, ...)
+{
+       va_list args;
+       va_start(args, format);
+       vfprintf(stderr, format, args);
+       va_end(args);
+}
+#else
+#define debug_printf(fmt,args...)      printf (fmt ,##args)
+#endif
+#else
+static inline void debug_printf(const char *format, ...) { }
+#endif
+#define final_printf debug_printf
+
+#ifdef __U_BOOT__
+static void syntax_err(void) {
+        printf("syntax error\n");
+}
+#else
+static void __syntax(char *file, int line) {
+       error_msg("syntax error %s:%d", file, line);
+}
+#define syntax() __syntax(__FILE__, __LINE__)
+#endif
+
+#ifdef __U_BOOT__
+static void *xmalloc(size_t size);
+static void *xrealloc(void *ptr, size_t size);
+#else
+/* Index of subroutines: */
+/*   function prototypes for builtins */
+static int builtin_cd(struct child_prog *child);
+static int builtin_env(struct child_prog *child);
+static int builtin_eval(struct child_prog *child);
+static int builtin_exec(struct child_prog *child);
+static int builtin_exit(struct child_prog *child);
+static int builtin_export(struct child_prog *child);
+static int builtin_fg_bg(struct child_prog *child);
+static int builtin_help(struct child_prog *child);
+static int builtin_jobs(struct child_prog *child);
+static int builtin_pwd(struct child_prog *child);
+static int builtin_read(struct child_prog *child);
+static int builtin_set(struct child_prog *child);
+static int builtin_shift(struct child_prog *child);
+static int builtin_source(struct child_prog *child);
+static int builtin_umask(struct child_prog *child);
+static int builtin_unset(struct child_prog *child);
+static int builtin_not_written(struct child_prog *child);
+#endif
+/*   o_string manipulation: */
+static int b_check_space(o_string *o, int len);
+static int b_addchr(o_string *o, int ch);
+static void b_reset(o_string *o);
+static int b_addqchr(o_string *o, int ch, int quote);
+#ifndef __U_BOOT__
+static int b_adduint(o_string *o, unsigned int i);
+#endif
+/*  in_str manipulations: */
+static int static_get(struct in_str *i);
+static int static_peek(struct in_str *i);
+static int file_get(struct in_str *i);
+static int file_peek(struct in_str *i);
+#ifndef __U_BOOT__
+static void setup_file_in_str(struct in_str *i, FILE *f);
+#else
+static void setup_file_in_str(struct in_str *i);
+#endif
+static void setup_string_in_str(struct in_str *i, const char *s);
+#ifndef __U_BOOT__
+/*  close_me manipulations: */
+static void mark_open(int fd);
+static void mark_closed(int fd);
+static void close_all(void);
+#endif
+/*  "run" the final data structures: */
+static char *indenter(int i);
+static int free_pipe_list(struct pipe *head, int indent);
+static int free_pipe(struct pipe *pi, int indent);
+/*  really run the final data structures: */
+#ifndef __U_BOOT__
+static int setup_redirects(struct child_prog *prog, int squirrel[]);
+#endif
+static int run_list_real(struct pipe *pi);
+#ifndef __U_BOOT__
+static void pseudo_exec(struct child_prog *child) __attribute__ ((noreturn));
+#endif
+static int run_pipe_real(struct pipe *pi);
+/*   extended glob support: */
+#ifndef __U_BOOT__
+static int globhack(const char *src, int flags, glob_t *pglob);
+static int glob_needed(const char *s);
+static int xglob(o_string *dest, int flags, glob_t *pglob);
+#endif
+/*   variable assignment: */
+static int is_assignment(const char *s);
+/*   data structure manipulation: */
+#ifndef __U_BOOT__
+static int setup_redirect(struct p_context *ctx, int fd, redir_type style, struct in_str *input);
+#endif
+static void initialize_context(struct p_context *ctx);
+static int done_word(o_string *dest, struct p_context *ctx);
+static int done_command(struct p_context *ctx);
+static int done_pipe(struct p_context *ctx, pipe_style type);
+/*   primary string parsing: */
+#ifndef __U_BOOT__
+static int redirect_dup_num(struct in_str *input);
+static int redirect_opt_num(o_string *o);
+static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end);
+static int parse_group(o_string *dest, struct p_context *ctx, struct in_str *input, int ch);
+#endif
+static char *lookup_param(char *src);
+static char *make_string(char **inp, int *nonnull);
+static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input);
+#ifndef __U_BOOT__
+static int parse_string(o_string *dest, struct p_context *ctx, const char *src);
+#endif
+static int parse_stream(o_string *dest, struct p_context *ctx, struct in_str *input0, int end_trigger);
+/*   setup: */
+static int parse_stream_outer(struct in_str *inp, int flag);
+#ifndef __U_BOOT__
+static int parse_string_outer(const char *s, int flag);
+static int parse_file_outer(FILE *f);
+#endif
+#ifndef __U_BOOT__
+/*   job management: */
+static int checkjobs(struct pipe* fg_pipe);
+static void insert_bg_job(struct pipe *pi);
+static void remove_bg_job(struct pipe *pi);
+#endif
+/*     local variable support */
+static char **make_list_in(char **inp, char *name);
+static char *insert_var_value(char *inp);
+static char *insert_var_value_sub(char *inp, int tag_subst);
+
+#ifndef __U_BOOT__
+/* Table of built-in functions.  They can be forked or not, depending on
+ * context: within pipes, they fork.  As simple commands, they do not.
+ * When used in non-forking context, they can change global variables
+ * in the parent shell process.  If forked, of course they can not.
+ * For example, 'unset foo | whatever' will parse and run, but foo will
+ * still be set at the end. */
+static struct built_in_command bltins[] = {
+       {"bg", "Resume a job in the background", builtin_fg_bg},
+       {"break", "Exit for, while or until loop", builtin_not_written},
+       {"cd", "Change working directory", builtin_cd},
+       {"continue", "Continue for, while or until loop", builtin_not_written},
+       {"env", "Print all environment variables", builtin_env},
+       {"eval", "Construct and run shell command", builtin_eval},
+       {"exec", "Exec command, replacing this shell with the exec'd process",
+               builtin_exec},
+       {"exit", "Exit from shell()", builtin_exit},
+       {"export", "Set environment variable", builtin_export},
+       {"fg", "Bring job into the foreground", builtin_fg_bg},
+       {"jobs", "Lists the active jobs", builtin_jobs},
+       {"pwd", "Print current directory", builtin_pwd},
+       {"read", "Input environment variable", builtin_read},
+       {"return", "Return from a function", builtin_not_written},
+       {"set", "Set/unset shell local variables", builtin_set},
+       {"shift", "Shift positional parameters", builtin_shift},
+       {"trap", "Trap signals", builtin_not_written},
+       {"ulimit","Controls resource limits", builtin_not_written},
+       {"umask","Sets file creation mask", builtin_umask},
+       {"unset", "Unset environment variable", builtin_unset},
+       {".", "Source-in and run commands in a file", builtin_source},
+       {"help", "List shell built-in commands", builtin_help},
+       {NULL, NULL, NULL}
+};
+
+static const char *set_cwd(void)
+{
+       if(cwd==unknown)
+               cwd = NULL;     /* xgetcwd(arg) called free(arg) */
+       cwd = xgetcwd((char *)cwd);
+       if (!cwd)
+               cwd = unknown;
+       return cwd;
+}
+
+/* built-in 'eval' handler */
+static int builtin_eval(struct child_prog *child)
+{
+       char *str = NULL;
+       int rcode = EXIT_SUCCESS;
+
+       if (child->argv[1]) {
+               str = make_string(child->argv + 1);
+               parse_string_outer(str, FLAG_EXIT_FROM_LOOP |
+                                       FLAG_PARSE_SEMICOLON);
+               free(str);
+               rcode = last_return_code;
+       }
+       return rcode;
+}
+
+/* built-in 'cd <path>' handler */
+static int builtin_cd(struct child_prog *child)
+{
+       char *newdir;
+       if (child->argv[1] == NULL)
+               newdir = getenv("HOME");
+       else
+               newdir = child->argv[1];
+       if (chdir(newdir)) {
+               printf("cd: %s: %s\n", newdir, strerror(errno));
+               return EXIT_FAILURE;
+       }
+       set_cwd();
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'env' handler */
+static int builtin_env(struct child_prog *dummy)
+{
+       char **e = environ;
+       if (e == NULL) return EXIT_FAILURE;
+       for (; *e; e++) {
+               puts(*e);
+       }
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'exec' handler */
+static int builtin_exec(struct child_prog *child)
+{
+       if (child->argv[1] == NULL)
+               return EXIT_SUCCESS;   /* Really? */
+       child->argv++;
+       pseudo_exec(child);
+       /* never returns */
+}
+
+/* built-in 'exit' handler */
+static int builtin_exit(struct child_prog *child)
+{
+       if (child->argv[1] == NULL)
+               exit(last_return_code);
+       exit (atoi(child->argv[1]));
+}
+
+/* built-in 'export VAR=value' handler */
+static int builtin_export(struct child_prog *child)
+{
+       int res = 0;
+       char *name = child->argv[1];
+
+       if (name == NULL) {
+               return (builtin_env(child));
+       }
+
+       name = strdup(name);
+
+       if(name) {
+               char *value = strchr(name, '=');
+
+               if (!value) {
+                       char *tmp;
+                       /* They are exporting something without an =VALUE */
+
+                       value = get_local_var(name);
+                       if (value) {
+                               size_t ln = strlen(name);
+
+                               tmp = realloc(name, ln+strlen(value)+2);
+                               if(tmp==NULL)
+                                       res = -1;
+                               else {
+                                       sprintf(tmp+ln, "=%s", value);
+                                       name = tmp;
+                               }
+                       } else {
+                               /* bash does not return an error when trying to export
+                                * an undefined variable.  Do likewise. */
+                               res = 1;
+                       }
+               }
+       }
+       if (res<0)
+               perror_msg("export");
+       else if(res==0)
+               res = set_local_var(name, 1);
+       else
+               res = 0;
+       free(name);
+       return res;
+}
+
+/* built-in 'fg' and 'bg' handler */
+static int builtin_fg_bg(struct child_prog *child)
+{
+       int i, jobnum;
+       struct pipe *pi=NULL;
+
+       if (!interactive)
+               return EXIT_FAILURE;
+       /* If they gave us no args, assume they want the last backgrounded task */
+       if (!child->argv[1]) {
+               for (pi = job_list; pi; pi = pi->next) {
+                       if (pi->jobid == last_jobid) {
+                               break;
+                       }
+               }
+               if (!pi) {
+                       error_msg("%s: no current job", child->argv[0]);
+                       return EXIT_FAILURE;
+               }
+       } else {
+               if (sscanf(child->argv[1], "%%%d", &jobnum) != 1) {
+                       error_msg("%s: bad argument '%s'", child->argv[0], child->argv[1]);
+                       return EXIT_FAILURE;
+               }
+               for (pi = job_list; pi; pi = pi->next) {
+                       if (pi->jobid == jobnum) {
+                               break;
+                       }
+               }
+               if (!pi) {
+                       error_msg("%s: %d: no such job", child->argv[0], jobnum);
+                       return EXIT_FAILURE;
+               }
+       }
+
+       if (*child->argv[0] == 'f') {
+               /* Put the job into the foreground.  */
+               tcsetpgrp(shell_terminal, pi->pgrp);
+       }
+
+       /* Restart the processes in the job */
+       for (i = 0; i < pi->num_progs; i++)
+               pi->progs[i].is_stopped = 0;
+
+       if ( (i=kill(- pi->pgrp, SIGCONT)) < 0) {
+               if (i == ESRCH) {
+                       remove_bg_job(pi);
+               } else {
+                       perror_msg("kill (SIGCONT)");
+               }
+       }
+
+       pi->stopped_progs = 0;
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'help' handler */
+static int builtin_help(struct child_prog *dummy)
+{
+       struct built_in_command *x;
+
+       printf("\nBuilt-in commands:\n");
+       printf("-------------------\n");
+       for (x = bltins; x->cmd; x++) {
+               if (x->descr==NULL)
+                       continue;
+               printf("%s\t%s\n", x->cmd, x->descr);
+       }
+       printf("\n\n");
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'jobs' handler */
+static int builtin_jobs(struct child_prog *child)
+{
+       struct pipe *job;
+       char *status_string;
+
+       for (job = job_list; job; job = job->next) {
+               if (job->running_progs == job->stopped_progs)
+                       status_string = "Stopped";
+               else
+                       status_string = "Running";
+
+               printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text);
+       }
+       return EXIT_SUCCESS;
+}
+
+
+/* built-in 'pwd' handler */
+static int builtin_pwd(struct child_prog *dummy)
+{
+       puts(set_cwd());
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'read VAR' handler */
+static int builtin_read(struct child_prog *child)
+{
+       int res;
+
+       if (child->argv[1]) {
+               char string[BUFSIZ];
+               char *var = 0;
+
+               string[0] = 0;  /* In case stdin has only EOF */
+               /* read string */
+               fgets(string, sizeof(string), stdin);
+               chomp(string);
+               var = malloc(strlen(child->argv[1])+strlen(string)+2);
+               if(var) {
+                       sprintf(var, "%s=%s", child->argv[1], string);
+                       res = set_local_var(var, 0);
+               } else
+                       res = -1;
+               if (res)
+                       fprintf(stderr, "read: %m\n");
+               free(var);      /* So not move up to avoid breaking errno */
+               return res;
+       } else {
+               do res=getchar(); while(res!='\n' && res!=EOF);
+               return 0;
+       }
+}
+
+/* built-in 'set VAR=value' handler */
+static int builtin_set(struct child_prog *child)
+{
+       char *temp = child->argv[1];
+       struct variables *e;
+
+       if (temp == NULL)
+               for(e = top_vars; e; e=e->next)
+                       printf("%s=%s\n", e->name, e->value);
+       else
+               set_local_var(temp, 0);
+
+               return EXIT_SUCCESS;
+}
+
+
+/* Built-in 'shift' handler */
+static int builtin_shift(struct child_prog *child)
+{
+       int n=1;
+       if (child->argv[1]) {
+               n=atoi(child->argv[1]);
+       }
+       if (n>=0 && n<global_argc) {
+               /* XXX This probably breaks $0 */
+               global_argc -= n;
+               global_argv += n;
+               return EXIT_SUCCESS;
+       } else {
+               return EXIT_FAILURE;
+       }
+}
+
+/* Built-in '.' handler (read-in and execute commands from file) */
+static int builtin_source(struct child_prog *child)
+{
+       FILE *input;
+       int status;
+
+       if (child->argv[1] == NULL)
+               return EXIT_FAILURE;
+
+       /* XXX search through $PATH is missing */
+       input = fopen(child->argv[1], "r");
+       if (!input) {
+               error_msg("Couldn't open file '%s'", child->argv[1]);
+               return EXIT_FAILURE;
+       }
+
+       /* Now run the file */
+       /* XXX argv and argc are broken; need to save old global_argv
+        * (pointer only is OK!) on this stack frame,
+        * set global_argv=child->argv+1, recurse, and restore. */
+       mark_open(fileno(input));
+       status = parse_file_outer(input);
+       mark_closed(fileno(input));
+       fclose(input);
+       return (status);
+}
+
+static int builtin_umask(struct child_prog *child)
+{
+       mode_t new_umask;
+       const char *arg = child->argv[1];
+       char *end;
+       if (arg) {
+               new_umask=strtoul(arg, &end, 8);
+               if (*end!='\0' || end == arg) {
+                       return EXIT_FAILURE;
+               }
+       } else {
+               printf("%.3o\n", (unsigned int) (new_umask=umask(0)));
+       }
+       umask(new_umask);
+       return EXIT_SUCCESS;
+}
+
+/* built-in 'unset VAR' handler */
+static int builtin_unset(struct child_prog *child)
+{
+       /* bash returned already true */
+       unset_local_var(child->argv[1]);
+       return EXIT_SUCCESS;
+}
+
+static int builtin_not_written(struct child_prog *child)
+{
+       printf("builtin_%s not written\n",child->argv[0]);
+       return EXIT_FAILURE;
+}
+#endif
+
+static int b_check_space(o_string *o, int len)
+{
+       /* It would be easy to drop a more restrictive policy
+        * in here, such as setting a maximum string length */
+       if (o->length + len > o->maxlen) {
+               char *old_data = o->data;
+               /* assert (data == NULL || o->maxlen != 0); */
+               o->maxlen += max(2*len, B_CHUNK);
+               o->data = realloc(o->data, 1 + o->maxlen);
+               if (o->data == NULL) {
+                       free(old_data);
+               }
+       }
+       return o->data == NULL;
+}
+
+static int b_addchr(o_string *o, int ch)
+{
+       debug_printf("b_addchr: %c %d %p\n", ch, o->length, o);
+       if (b_check_space(o, 1)) return B_NOSPAC;
+       o->data[o->length] = ch;
+       o->length++;
+       o->data[o->length] = '\0';
+       return 0;
+}
+
+static void b_reset(o_string *o)
+{
+       o->length = 0;
+       o->nonnull = 0;
+       if (o->data != NULL) *o->data = '\0';
+}
+
+static void b_free(o_string *o)
+{
+       b_reset(o);
+       free(o->data);
+       o->data = NULL;
+       o->maxlen = 0;
+}
+
+/* My analysis of quoting semantics tells me that state information
+ * is associated with a destination, not a source.
+ */
+static int b_addqchr(o_string *o, int ch, int quote)
+{
+       if (quote && strchr("*?[\\",ch)) {
+               int rc;
+               rc = b_addchr(o, '\\');
+               if (rc) return rc;
+       }
+       return b_addchr(o, ch);
+}
+
+#ifndef __U_BOOT__
+static int b_adduint(o_string *o, unsigned int i)
+{
+       int r;
+       char *p = simple_itoa(i);
+       /* no escape checking necessary */
+       do r=b_addchr(o, *p++); while (r==0 && *p);
+       return r;
+}
+#endif
+
+static int static_get(struct in_str *i)
+{
+       int ch = *i->p++;
+       if (ch=='\0') return EOF;
+       return ch;
+}
+
+static int static_peek(struct in_str *i)
+{
+       return *i->p;
+}
+
+#ifndef __U_BOOT__
+static inline void cmdedit_set_initial_prompt(void)
+{
+#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
+       PS1 = NULL;
+#else
+       PS1 = getenv("PS1");
+       if(PS1==0)
+               PS1 = "\\w \\$ ";
+#endif
+}
+
+static inline void setup_prompt_string(int promptmode, char **prompt_str)
+{
+       debug_printf("setup_prompt_string %d ",promptmode);
+#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
+       /* Set up the prompt */
+       if (promptmode == 1) {
+               free(PS1);
+               PS1=xmalloc(strlen(cwd)+4);
+               sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ?  "$ ":"# ");
+               *prompt_str = PS1;
+       } else {
+               *prompt_str = PS2;
+       }
+#else
+       *prompt_str = (promptmode==1)? PS1 : PS2;
+#endif
+       debug_printf("result %s\n",*prompt_str);
+}
+#endif
+
+static void get_user_input(struct in_str *i)
+{
+#ifndef __U_BOOT__
+       char *prompt_str;
+       static char the_command[BUFSIZ];
+
+       setup_prompt_string(i->promptmode, &prompt_str);
+#ifdef CONFIG_FEATURE_COMMAND_EDITING
+       /*
+        ** enable command line editing only while a command line
+        ** is actually being read; otherwise, we'll end up bequeathing
+        ** atexit() handlers and other unwanted stuff to our
+        ** child processes (rob@sysgo.de)
+        */
+       cmdedit_read_input(prompt_str, the_command);
+#else
+       fputs(prompt_str, stdout);
+       fflush(stdout);
+       the_command[0]=fgetc(i->file);
+       the_command[1]='\0';
+#endif
+       fflush(stdout);
+       i->p = the_command;
+#else
+       int n;
+       static char the_command[CONFIG_SYS_CBSIZE + 1];
+
+#ifdef CONFIG_BOOT_RETRY_TIME
+#  ifndef CONFIG_RESET_TO_RETRY
+#      error "This currently only works with CONFIG_RESET_TO_RETRY enabled"
+#  endif
+       reset_cmd_timeout();
+#endif
+       i->__promptme = 1;
+       if (i->promptmode == 1) {
+               n = readline(CONFIG_SYS_PROMPT);
+       } else {
+               n = readline(CONFIG_SYS_PROMPT_HUSH_PS2);
+       }
+#ifdef CONFIG_BOOT_RETRY_TIME
+       if (n == -2) {
+         puts("\nTimeout waiting for command\n");
+#  ifdef CONFIG_RESET_TO_RETRY
+         do_reset(NULL, 0, 0, NULL);
+#  else
+#      error "This currently only works with CONFIG_RESET_TO_RETRY enabled"
+#  endif
+       }
+#endif
+       if (n == -1 ) {
+               flag_repeat = 0;
+               i->__promptme = 0;
+       }
+       n = strlen(console_buffer);
+       console_buffer[n] = '\n';
+       console_buffer[n+1]= '\0';
+       if (had_ctrlc()) flag_repeat = 0;
+       clear_ctrlc();
+       do_repeat = 0;
+       if (i->promptmode == 1) {
+               if (console_buffer[0] == '\n'&& flag_repeat == 0) {
+                       strcpy(the_command,console_buffer);
+               }
+               else {
+                       if (console_buffer[0] != '\n') {
+                               strcpy(the_command,console_buffer);
+                               flag_repeat = 1;
+                       }
+                       else {
+                               do_repeat = 1;
+                       }
+               }
+               i->p = the_command;
+       }
+       else {
+               if (console_buffer[0] != '\n') {
+                       if (strlen(the_command) + strlen(console_buffer)
+                           < CONFIG_SYS_CBSIZE) {
+                               n = strlen(the_command);
+                               the_command[n-1] = ' ';
+                               strcpy(&the_command[n],console_buffer);
+                       }
+                       else {
+                               the_command[0] = '\n';
+                               the_command[1] = '\0';
+                               flag_repeat = 0;
+                       }
+               }
+               if (i->__promptme == 0) {
+                       the_command[0] = '\n';
+                       the_command[1] = '\0';
+               }
+               i->p = console_buffer;
+       }
+#endif
+}
+
+/* This is the magic location that prints prompts
+ * and gets data back from the user */
+static int file_get(struct in_str *i)
+{
+       int ch;
+
+       ch = 0;
+       /* If there is data waiting, eat it up */
+       if (i->p && *i->p) {
+               ch = *i->p++;
+       } else {
+               /* need to double check i->file because we might be doing something
+                * more complicated by now, like sourcing or substituting. */
+#ifndef __U_BOOT__
+               if (i->__promptme && interactive && i->file == stdin) {
+                       while(! i->p || (interactive && strlen(i->p)==0) ) {
+#else
+                       while(! i->p  || strlen(i->p)==0 ) {
+#endif
+                               get_user_input(i);
+                       }
+                       i->promptmode=2;
+#ifndef __U_BOOT__
+                       i->__promptme = 0;
+#endif
+                       if (i->p && *i->p) {
+                               ch = *i->p++;
+                       }
+#ifndef __U_BOOT__
+               } else {
+                       ch = fgetc(i->file);
+               }
+
+#endif
+               debug_printf("b_getch: got a %d\n", ch);
+       }
+#ifndef __U_BOOT__
+       if (ch == '\n') i->__promptme=1;
+#endif
+       return ch;
+}
+
+/* All the callers guarantee this routine will never be
+ * used right after a newline, so prompting is not needed.
+ */
+static int file_peek(struct in_str *i)
+{
+#ifndef __U_BOOT__
+       if (i->p && *i->p) {
+#endif
+               return *i->p;
+#ifndef __U_BOOT__
+       } else {
+               i->peek_buf[0] = fgetc(i->file);
+               i->peek_buf[1] = '\0';
+               i->p = i->peek_buf;
+               debug_printf("b_peek: got a %d\n", *i->p);
+               return *i->p;
+       }
+#endif
+}
+
+#ifndef __U_BOOT__
+static void setup_file_in_str(struct in_str *i, FILE *f)
+#else
+static void setup_file_in_str(struct in_str *i)
+#endif
+{
+       i->peek = file_peek;
+       i->get = file_get;
+       i->__promptme=1;
+       i->promptmode=1;
+#ifndef __U_BOOT__
+       i->file = f;
+#endif
+       i->p = NULL;
+}
+
+static void setup_string_in_str(struct in_str *i, const char *s)
+{
+       i->peek = static_peek;
+       i->get = static_get;
+       i->__promptme=1;
+       i->promptmode=1;
+       i->p = s;
+}
+
+#ifndef __U_BOOT__
+static void mark_open(int fd)
+{
+       struct close_me *new = xmalloc(sizeof(struct close_me));
+       new->fd = fd;
+       new->next = close_me_head;
+       close_me_head = new;
+}
+
+static void mark_closed(int fd)
+{
+       struct close_me *tmp;
+       if (close_me_head == NULL || close_me_head->fd != fd)
+               error_msg_and_die("corrupt close_me");
+       tmp = close_me_head;
+       close_me_head = close_me_head->next;
+       free(tmp);
+}
+
+static void close_all(void)
+{
+       struct close_me *c;
+       for (c=close_me_head; c; c=c->next) {
+               close(c->fd);
+       }
+       close_me_head = NULL;
+}
+
+/* squirrel != NULL means we squirrel away copies of stdin, stdout,
+ * and stderr if they are redirected. */
+static int setup_redirects(struct child_prog *prog, int squirrel[])
+{
+       int openfd, mode;
+       struct redir_struct *redir;
+
+       for (redir=prog->redirects; redir; redir=redir->next) {
+               if (redir->dup == -1 && redir->word.gl_pathv == NULL) {
+                       /* something went wrong in the parse.  Pretend it didn't happen */
+                       continue;
+               }
+               if (redir->dup == -1) {
+                       mode=redir_table[redir->type].mode;
+                       openfd = open(redir->word.gl_pathv[0], mode, 0666);
+                       if (openfd < 0) {
+                       /* this could get lost if stderr has been redirected, but
+                          bash and ash both lose it as well (though zsh doesn't!) */
+                               perror_msg("error opening %s", redir->word.gl_pathv[0]);
+                               return 1;
+                       }
+               } else {
+                       openfd = redir->dup;
+               }
+
+               if (openfd != redir->fd) {
+                       if (squirrel && redir->fd < 3) {
+                               squirrel[redir->fd] = dup(redir->fd);
+                       }
+                       if (openfd == -3) {
+                               close(openfd);
+                       } else {
+                               dup2(openfd, redir->fd);
+                               if (redir->dup == -1)
+                                       close (openfd);
+                       }
+               }
+       }
+       return 0;
+}
+
+static void restore_redirects(int squirrel[])
+{
+       int i, fd;
+       for (i=0; i<3; i++) {
+               fd = squirrel[i];
+               if (fd != -1) {
+                       /* No error checking.  I sure wouldn't know what
+                        * to do with an error if I found one! */
+                       dup2(fd, i);
+                       close(fd);
+               }
+       }
+}
+
+/* never returns */
+/* XXX no exit() here.  If you don't exec, use _exit instead.
+ * The at_exit handlers apparently confuse the calling process,
+ * in particular stdin handling.  Not sure why? */
+static void pseudo_exec(struct child_prog *child)
+{
+       int i, rcode;
+       char *p;
+       struct built_in_command *x;
+       if (child->argv) {
+               for (i=0; is_assignment(child->argv[i]); i++) {
+                       debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
+                       p = insert_var_value(child->argv[i]);
+                       putenv(strdup(p));
+                       if (p != child->argv[i]) free(p);
+               }
+               child->argv+=i;  /* XXX this hack isn't so horrible, since we are about
+                                       to exit, and therefore don't need to keep data
+                                       structures consistent for free() use. */
+               /* If a variable is assigned in a forest, and nobody listens,
+                * was it ever really set?
+                */
+               if (child->argv[0] == NULL) {
+                       _exit(EXIT_SUCCESS);
+               }
+
+               /*
+                * Check if the command matches any of the builtins.
+                * Depending on context, this might be redundant.  But it's
+                * easier to waste a few CPU cycles than it is to figure out
+                * if this is one of those cases.
+                */
+               for (x = bltins; x->cmd; x++) {
+                       if (strcmp(child->argv[0], x->cmd) == 0 ) {
+                               debug_printf("builtin exec %s\n", child->argv[0]);
+                               rcode = x->function(child);
+                               fflush(stdout);
+                               _exit(rcode);
+                       }
+               }
+
+               /* Check if the command matches any busybox internal commands
+                * ("applets") here.
+                * FIXME: This feature is not 100% safe, since
+                * BusyBox is not fully reentrant, so we have no guarantee the things
+                * from the .bss are still zeroed, or that things from .data are still
+                * at their defaults.  We could exec ourself from /proc/self/exe, but I
+                * really dislike relying on /proc for things.  We could exec ourself
+                * from global_argv[0], but if we are in a chroot, we may not be able
+                * to find ourself... */
+#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
+               {
+                       int argc_l;
+                       char** argv_l=child->argv;
+                       char *name = child->argv[0];
+
+#ifdef CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
+                       /* Following discussions from November 2000 on the busybox mailing
+                        * list, the default configuration, (without
+                        * get_last_path_component()) lets the user force use of an
+                        * external command by specifying the full (with slashes) filename.
+                        * If you enable CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN then applets
+                        * _aways_ override external commands, so if you want to run
+                        * /bin/cat, it will use BusyBox cat even if /bin/cat exists on the
+                        * filesystem and is _not_ busybox.  Some systems may want this,
+                        * most do not.  */
+                       name = get_last_path_component(name);
+#endif
+                       /* Count argc for use in a second... */
+                       for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
+                       optind = 1;
+                       debug_printf("running applet %s\n", name);
+                       run_applet_by_name(name, argc_l, child->argv);
+               }
+#endif
+               debug_printf("exec of %s\n",child->argv[0]);
+               execvp(child->argv[0],child->argv);
+               perror_msg("couldn't exec: %s",child->argv[0]);
+               _exit(1);
+       } else if (child->group) {
+               debug_printf("runtime nesting to group\n");
+               interactive=0;    /* crucial!!!! */
+               rcode = run_list_real(child->group);
+               /* OK to leak memory by not calling free_pipe_list,
+                * since this process is about to exit */
+               _exit(rcode);
+       } else {
+               /* Can happen.  See what bash does with ">foo" by itself. */
+               debug_printf("trying to pseudo_exec null command\n");
+               _exit(EXIT_SUCCESS);
+       }
+}
+
+static void insert_bg_job(struct pipe *pi)
+{
+       struct pipe *thejob;
+
+       /* Linear search for the ID of the job to use */
+       pi->jobid = 1;
+       for (thejob = job_list; thejob; thejob = thejob->next)
+               if (thejob->jobid >= pi->jobid)
+                       pi->jobid = thejob->jobid + 1;
+
+       /* add thejob to the list of running jobs */
+       if (!job_list) {
+               thejob = job_list = xmalloc(sizeof(*thejob));
+       } else {
+               for (thejob = job_list; thejob->next; thejob = thejob->next) /* nothing */;
+               thejob->next = xmalloc(sizeof(*thejob));
+               thejob = thejob->next;
+       }
+
+       /* physically copy the struct job */
+       memcpy(thejob, pi, sizeof(struct pipe));
+       thejob->next = NULL;
+       thejob->running_progs = thejob->num_progs;
+       thejob->stopped_progs = 0;
+       thejob->text = xmalloc(BUFSIZ); /* cmdedit buffer size */
+
+       /*if (pi->progs[0] && pi->progs[0].argv && pi->progs[0].argv[0]) */
+       {
+               char *bar=thejob->text;
+               char **foo=pi->progs[0].argv;
+               while(foo && *foo) {
+                       bar += sprintf(bar, "%s ", *foo++);
+               }
+       }
+
+       /* we don't wait for background thejobs to return -- append it
+          to the list of backgrounded thejobs and leave it alone */
+       printf("[%d] %d\n", thejob->jobid, thejob->progs[0].pid);
+       last_bg_pid = thejob->progs[0].pid;
+       last_jobid = thejob->jobid;
+}
+
+/* remove a backgrounded job */
+static void remove_bg_job(struct pipe *pi)
+{
+       struct pipe *prev_pipe;
+
+       if (pi == job_list) {
+               job_list = pi->next;
+       } else {
+               prev_pipe = job_list;
+               while (prev_pipe->next != pi)
+                       prev_pipe = prev_pipe->next;
+               prev_pipe->next = pi->next;
+       }
+       if (job_list)
+               last_jobid = job_list->jobid;
+       else
+               last_jobid = 0;
+
+       pi->stopped_progs = 0;
+       free_pipe(pi, 0);
+       free(pi);
+}
+
+/* Checks to see if any processes have exited -- if they
+   have, figure out why and see if a job has completed */
+static int checkjobs(struct pipe* fg_pipe)
+{
+       int attributes;
+       int status;
+       int prognum = 0;
+       struct pipe *pi;
+       pid_t childpid;
+
+       attributes = WUNTRACED;
+       if (fg_pipe==NULL) {
+               attributes |= WNOHANG;
+       }
+
+       while ((childpid = waitpid(-1, &status, attributes)) > 0) {
+               if (fg_pipe) {
+                       int i, rcode = 0;
+                       for (i=0; i < fg_pipe->num_progs; i++) {
+                               if (fg_pipe->progs[i].pid == childpid) {
+                                       if (i==fg_pipe->num_progs-1)
+                                               rcode=WEXITSTATUS(status);
+                                       (fg_pipe->num_progs)--;
+                                       return(rcode);
+                               }
+                       }
+               }
+
+               for (pi = job_list; pi; pi = pi->next) {
+                       prognum = 0;
+                       while (prognum < pi->num_progs && pi->progs[prognum].pid != childpid) {
+                               prognum++;
+                       }
+                       if (prognum < pi->num_progs)
+                               break;
+               }
+
+               if(pi==NULL) {
+                       debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
+                       continue;
+               }
+
+               if (WIFEXITED(status) || WIFSIGNALED(status)) {
+                       /* child exited */
+                       pi->running_progs--;
+                       pi->progs[prognum].pid = 0;
+
+                       if (!pi->running_progs) {
+                               printf(JOB_STATUS_FORMAT, pi->jobid, "Done", pi->text);
+                               remove_bg_job(pi);
+                       }
+               } else {
+                       /* child stopped */
+                       pi->stopped_progs++;
+                       pi->progs[prognum].is_stopped = 1;
+
+#if 0
+                       /* Printing this stuff is a pain, since it tends to
+                        * overwrite the prompt an inconveinient moments.  So
+                        * don't do that.  */
+                       if (pi->stopped_progs == pi->num_progs) {
+                               printf("\n"JOB_STATUS_FORMAT, pi->jobid, "Stopped", pi->text);
+                       }
+#endif
+               }
+       }
+
+       if (childpid == -1 && errno != ECHILD)
+               perror_msg("waitpid");
+
+       /* move the shell to the foreground */
+       /*if (interactive && tcsetpgrp(shell_terminal, getpgid(0))) */
+       /*      perror_msg("tcsetpgrp-2"); */
+       return -1;
+}
+
+/* Figure out our controlling tty, checking in order stderr,
+ * stdin, and stdout.  If check_pgrp is set, also check that
+ * we belong to the foreground process group associated with
+ * that tty.  The value of shell_terminal is needed in order to call
+ * tcsetpgrp(shell_terminal, ...); */
+void controlling_tty(int check_pgrp)
+{
+       pid_t curpgrp;
+
+       if ((curpgrp = tcgetpgrp(shell_terminal = 2)) < 0
+                       && (curpgrp = tcgetpgrp(shell_terminal = 0)) < 0
+                       && (curpgrp = tcgetpgrp(shell_terminal = 1)) < 0)
+               goto shell_terminal_error;
+
+       if (check_pgrp && curpgrp != getpgid(0))
+               goto shell_terminal_error;
+
+       return;
+
+shell_terminal_error:
+               shell_terminal = -1;
+               return;
+}
+#endif
+
+/* run_pipe_real() starts all the jobs, but doesn't wait for anything
+ * to finish.  See checkjobs().
+ *
+ * return code is normally -1, when the caller has to wait for children
+ * to finish to determine the exit status of the pipe.  If the pipe
+ * is a simple builtin command, however, the action is done by the
+ * time run_pipe_real returns, and the exit code is provided as the
+ * return value.
+ *
+ * The input of the pipe is always stdin, the output is always
+ * stdout.  The outpipe[] mechanism in BusyBox-0.48 lash is bogus,
+ * because it tries to avoid running the command substitution in
+ * subshell, when that is in fact necessary.  The subshell process
+ * now has its stdout directed to the input of the appropriate pipe,
+ * so this routine is noticeably simpler.
+ */
+static int run_pipe_real(struct pipe *pi)
+{
+       int i;
+#ifndef __U_BOOT__
+       int nextin, nextout;
+       int pipefds[2];                         /* pipefds[0] is for reading */
+       struct child_prog *child;
+       struct built_in_command *x;
+       char *p;
+# if __GNUC__
+       /* Avoid longjmp clobbering */
+       (void) &i;
+       (void) &nextin;
+       (void) &nextout;
+       (void) &child;
+# endif
+#else
+       int nextin;
+       int flag = do_repeat ? CMD_FLAG_REPEAT : 0;
+       struct child_prog *child;
+       char *p;
+# if __GNUC__
+       /* Avoid longjmp clobbering */
+       (void) &i;
+       (void) &nextin;
+       (void) &child;
+# endif
+#endif /* __U_BOOT__ */
+
+       nextin = 0;
+#ifndef __U_BOOT__
+       pi->pgrp = -1;
+#endif
+
+       /* Check if this is a simple builtin (not part of a pipe).
+        * Builtins within pipes have to fork anyway, and are handled in
+        * pseudo_exec.  "echo foo | read bar" doesn't work on bash, either.
+        */
+       if (pi->num_progs == 1) child = & (pi->progs[0]);
+#ifndef __U_BOOT__
+       if (pi->num_progs == 1 && child->group && child->subshell == 0) {
+               int squirrel[] = {-1, -1, -1};
+               int rcode;
+               debug_printf("non-subshell grouping\n");
+               setup_redirects(child, squirrel);
+               /* XXX could we merge code with following builtin case,
+                * by creating a pseudo builtin that calls run_list_real? */
+               rcode = run_list_real(child->group);
+               restore_redirects(squirrel);
+#else
+               if (pi->num_progs == 1 && child->group) {
+               int rcode;
+               debug_printf("non-subshell grouping\n");
+               rcode = run_list_real(child->group);
+#endif
+               return rcode;
+       } else if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
+               for (i=0; is_assignment(child->argv[i]); i++) { /* nothing */ }
+               if (i!=0 && child->argv[i]==NULL) {
+                       /* assignments, but no command: set the local environment */
+                       for (i=0; child->argv[i]!=NULL; i++) {
+
+                               /* Ok, this case is tricky.  We have to decide if this is a
+                                * local variable, or an already exported variable.  If it is
+                                * already exported, we have to export the new value.  If it is
+                                * not exported, we need only set this as a local variable.
+                                * This junk is all to decide whether or not to export this
+                                * variable. */
+                               int export_me=0;
+                               char *name, *value;
+                               name = xstrdup(child->argv[i]);
+                               debug_printf("Local environment set: %s\n", name);
+                               value = strchr(name, '=');
+                               if (value)
+                                       *value=0;
+#ifndef __U_BOOT__
+                               if ( get_local_var(name)) {
+                                       export_me=1;
+                               }
+#endif
+                               free(name);
+                               p = insert_var_value(child->argv[i]);
+                               set_local_var(p, export_me);
+                               if (p != child->argv[i]) free(p);
+                       }
+                       return EXIT_SUCCESS;   /* don't worry about errors in set_local_var() yet */
+               }
+               for (i = 0; is_assignment(child->argv[i]); i++) {
+                       p = insert_var_value(child->argv[i]);
+#ifndef __U_BOOT__
+                       putenv(strdup(p));
+#else
+                       set_local_var(p, 0);
+#endif
+                       if (p != child->argv[i]) {
+                               child->sp--;
+                               free(p);
+                       }
+               }
+               if (child->sp) {
+                       char * str = NULL;
+
+                       str = make_string(child->argv + i,
+                                         child->argv_nonnull + i);
+                       parse_string_outer(str, FLAG_EXIT_FROM_LOOP | FLAG_REPARSING);
+                       free(str);
+                       return last_return_code;
+               }
+#ifndef __U_BOOT__
+               for (x = bltins; x->cmd; x++) {
+                       if (strcmp(child->argv[i], x->cmd) == 0 ) {
+                               int squirrel[] = {-1, -1, -1};
+                               int rcode;
+                               if (x->function == builtin_exec && child->argv[i+1]==NULL) {
+                                       debug_printf("magic exec\n");
+                                       setup_redirects(child,NULL);
+                                       return EXIT_SUCCESS;
+                               }
+                               debug_printf("builtin inline %s\n", child->argv[0]);
+                               /* XXX setup_redirects acts on file descriptors, not FILEs.
+                                * This is perfect for work that comes after exec().
+                                * Is it really safe for inline use?  Experimentally,
+                                * things seem to work with glibc. */
+                               setup_redirects(child, squirrel);
+
+                               child->argv += i;  /* XXX horrible hack */
+                               rcode = x->function(child);
+                               /* XXX restore hack so free() can work right */
+                               child->argv -= i;
+                               restore_redirects(squirrel);
+                       }
+                       return rcode;
+               }
+#else
+               /* check ";", because ,example , argv consist from
+                * "help;flinfo" must not execute
+                */
+               if (strchr(child->argv[i], ';')) {
+                       printf("Unknown command '%s' - try 'help' or use "
+                                       "'run' command\n", child->argv[i]);
+                       return -1;
+               }
+               /* Process the command */
+               return cmd_process(flag, child->argc, child->argv,
+                                  &flag_repeat, NULL);
+#endif
+       }
+#ifndef __U_BOOT__
+
+       for (i = 0; i < pi->num_progs; i++) {
+               child = & (pi->progs[i]);
+
+               /* pipes are inserted between pairs of commands */
+               if ((i + 1) < pi->num_progs) {
+                       if (pipe(pipefds)<0) perror_msg_and_die("pipe");
+                       nextout = pipefds[1];
+               } else {
+                       nextout=1;
+                       pipefds[0] = -1;
+               }
+
+               /* XXX test for failed fork()? */
+               if (!(child->pid = fork())) {
+                       /* Set the handling for job control signals back to the default.  */
+                       signal(SIGINT, SIG_DFL);
+                       signal(SIGQUIT, SIG_DFL);
+                       signal(SIGTERM, SIG_DFL);
+                       signal(SIGTSTP, SIG_DFL);
+                       signal(SIGTTIN, SIG_DFL);
+                       signal(SIGTTOU, SIG_DFL);
+                       signal(SIGCHLD, SIG_DFL);
+
+                       close_all();
+
+                       if (nextin != 0) {
+                               dup2(nextin, 0);
+                               close(nextin);
+                       }
+                       if (nextout != 1) {
+                               dup2(nextout, 1);
+                               close(nextout);
+                       }
+                       if (pipefds[0]!=-1) {
+                               close(pipefds[0]);  /* opposite end of our output pipe */
+                       }
+
+                       /* Like bash, explicit redirects override pipes,
+                        * and the pipe fd is available for dup'ing. */
+                       setup_redirects(child,NULL);
+
+                       if (interactive && pi->followup!=PIPE_BG) {
+                               /* If we (the child) win the race, put ourselves in the process
+                                * group whose leader is the first process in this pipe. */
+                               if (pi->pgrp < 0) {
+                                       pi->pgrp = getpid();
+                               }
+                               if (setpgid(0, pi->pgrp) == 0) {
+                                       tcsetpgrp(2, pi->pgrp);
+                               }
+                       }
+
+                       pseudo_exec(child);
+               }
+
+
+               /* put our child in the process group whose leader is the
+                  first process in this pipe */
+               if (pi->pgrp < 0) {
+                       pi->pgrp = child->pid;
+               }
+               /* Don't check for errors.  The child may be dead already,
+                * in which case setpgid returns error code EACCES. */
+               setpgid(child->pid, pi->pgrp);
+
+               if (nextin != 0)
+                       close(nextin);
+               if (nextout != 1)
+                       close(nextout);
+
+               /* If there isn't another process, nextin is garbage
+                  but it doesn't matter */
+               nextin = pipefds[0];
+       }
+#endif
+       return -1;
+}
+
+static int run_list_real(struct pipe *pi)
+{
+       char *save_name = NULL;
+       char **list = NULL;
+       char **save_list = NULL;
+       struct pipe *rpipe;
+       int flag_rep = 0;
+#ifndef __U_BOOT__
+       int save_num_progs;
+#endif
+       int rcode=0, flag_skip=1;
+       int flag_restore = 0;
+       int if_code=0, next_if_code=0;  /* need double-buffer to handle elif */
+       reserved_style rmode, skip_more_in_this_rmode=RES_XXXX;
+       /* check syntax for "for" */
+       for (rpipe = pi; rpipe; rpipe = rpipe->next) {
+               if ((rpipe->r_mode == RES_IN ||
+                   rpipe->r_mode == RES_FOR) &&
+                   (rpipe->next == NULL)) {
+                               syntax();
+#ifdef __U_BOOT__
+                               flag_repeat = 0;
+#endif
+                               return 1;
+               }
+               if ((rpipe->r_mode == RES_IN &&
+                       (rpipe->next->r_mode == RES_IN &&
+                       rpipe->next->progs->argv != NULL))||
+                       (rpipe->r_mode == RES_FOR &&
+                       rpipe->next->r_mode != RES_IN)) {
+                               syntax();
+#ifdef __U_BOOT__
+                               flag_repeat = 0;
+#endif
+                               return 1;
+               }
+       }
+       for (; pi; pi = (flag_restore != 0) ? rpipe : pi->next) {
+               if (pi->r_mode == RES_WHILE || pi->r_mode == RES_UNTIL ||
+                       pi->r_mode == RES_FOR) {
+#ifdef __U_BOOT__
+                               /* check Ctrl-C */
+                               ctrlc();
+                               if ((had_ctrlc())) {
+                                       return 1;
+                               }
+#endif
+                               flag_restore = 0;
+                               if (!rpipe) {
+                                       flag_rep = 0;
+                                       rpipe = pi;
+                               }
+               }
+               rmode = pi->r_mode;
+               debug_printf("rmode=%d  if_code=%d  next_if_code=%d skip_more=%d\n", rmode, if_code, next_if_code, skip_more_in_this_rmode);
+               if (rmode == skip_more_in_this_rmode && flag_skip) {
+                       if (pi->followup == PIPE_SEQ) flag_skip=0;
+                       continue;
+               }
+               flag_skip = 1;
+               skip_more_in_this_rmode = RES_XXXX;
+               if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code;
+               if (rmode == RES_THEN &&  if_code) continue;
+               if (rmode == RES_ELSE && !if_code) continue;
+               if (rmode == RES_ELIF && !if_code) break;
+               if (rmode == RES_FOR && pi->num_progs) {
+                       if (!list) {
+                               /* if no variable values after "in" we skip "for" */
+                               if (!pi->next->progs->argv) continue;
+                               /* create list of variable values */
+                               list = make_list_in(pi->next->progs->argv,
+                                       pi->progs->argv[0]);
+                               save_list = list;
+                               save_name = pi->progs->argv[0];
+                               pi->progs->argv[0] = NULL;
+                               flag_rep = 1;
+                       }
+                       if (!(*list)) {
+                               free(pi->progs->argv[0]);
+                               free(save_list);
+                               list = NULL;
+                               flag_rep = 0;
+                               pi->progs->argv[0] = save_name;
+#ifndef __U_BOOT__
+                               pi->progs->glob_result.gl_pathv[0] =
+                                       pi->progs->argv[0];
+#endif
+                               continue;
+                       } else {
+                               /* insert new value from list for variable */
+                               if (pi->progs->argv[0])
+                                       free(pi->progs->argv[0]);
+                               pi->progs->argv[0] = *list++;
+#ifndef __U_BOOT__
+                               pi->progs->glob_result.gl_pathv[0] =
+                                       pi->progs->argv[0];
+#endif
+                       }
+               }
+               if (rmode == RES_IN) continue;
+               if (rmode == RES_DO) {
+                       if (!flag_rep) continue;
+               }
+               if ((rmode == RES_DONE)) {
+                       if (flag_rep) {
+                               flag_restore = 1;
+                       } else {
+                               rpipe = NULL;
+                       }
+               }
+               if (pi->num_progs == 0) continue;
+#ifndef __U_BOOT__
+               save_num_progs = pi->num_progs; /* save number of programs */
+#endif
+               rcode = run_pipe_real(pi);
+               debug_printf("run_pipe_real returned %d\n",rcode);
+#ifndef __U_BOOT__
+               if (rcode!=-1) {
+                       /* We only ran a builtin: rcode was set by the return value
+                        * of run_pipe_real(), and we don't need to wait for anything. */
+               } else if (pi->followup==PIPE_BG) {
+                       /* XXX check bash's behavior with nontrivial pipes */
+                       /* XXX compute jobid */
+                       /* XXX what does bash do with attempts to background builtins? */
+                       insert_bg_job(pi);
+                       rcode = EXIT_SUCCESS;
+               } else {
+                       if (interactive) {
+                               /* move the new process group into the foreground */
+                               if (tcsetpgrp(shell_terminal, pi->pgrp) && errno != ENOTTY)
+                                       perror_msg("tcsetpgrp-3");
+                               rcode = checkjobs(pi);
+                               /* move the shell to the foreground */
+                               if (tcsetpgrp(shell_terminal, getpgid(0)) && errno != ENOTTY)
+                                       perror_msg("tcsetpgrp-4");
+                       } else {
+                               rcode = checkjobs(pi);
+                       }
+                       debug_printf("checkjobs returned %d\n",rcode);
+               }
+               last_return_code=rcode;
+#else
+               if (rcode < -1) {
+                       last_return_code = -rcode - 2;
+                       return -2;      /* exit */
+               }
+               last_return_code=(rcode == 0) ? 0 : 1;
+#endif
+#ifndef __U_BOOT__
+               pi->num_progs = save_num_progs; /* restore number of programs */
+#endif
+               if ( rmode == RES_IF || rmode == RES_ELIF )
+                       next_if_code=rcode;  /* can be overwritten a number of times */
+               if (rmode == RES_WHILE)
+                       flag_rep = !last_return_code;
+               if (rmode == RES_UNTIL)
+                       flag_rep = last_return_code;
+               if ( (rcode==EXIT_SUCCESS && pi->followup==PIPE_OR) ||
+                    (rcode!=EXIT_SUCCESS && pi->followup==PIPE_AND) )
+                       skip_more_in_this_rmode=rmode;
+#ifndef __U_BOOT__
+               checkjobs(NULL);
+#endif
+       }
+       return rcode;
+}
+
+/* broken, of course, but OK for testing */
+static char *indenter(int i)
+{
+       static char blanks[]="                                    ";
+       return &blanks[sizeof(blanks)-i-1];
+}
+
+/* return code is the exit status of the pipe */
+static int free_pipe(struct pipe *pi, int indent)
+{
+       char **p;
+       struct child_prog *child;
+#ifndef __U_BOOT__
+       struct redir_struct *r, *rnext;
+#endif
+       int a, i, ret_code=0;
+       char *ind = indenter(indent);
+
+#ifndef __U_BOOT__
+       if (pi->stopped_progs > 0)
+               return ret_code;
+       final_printf("%s run pipe: (pid %d)\n",ind,getpid());
+#endif
+       for (i=0; i<pi->num_progs; i++) {
+               child = &pi->progs[i];
+               final_printf("%s  command %d:\n",ind,i);
+               if (child->argv) {
+                       for (a=0,p=child->argv; *p; a++,p++) {
+                               final_printf("%s   argv[%d] = %s\n",ind,a,*p);
+                       }
+#ifndef __U_BOOT__
+                       globfree(&child->glob_result);
+#else
+                       for (a = 0; a < child->argc; a++) {
+                               free(child->argv[a]);
+                       }
+                       free(child->argv);
+                       free(child->argv_nonnull);
+                       child->argc = 0;
+#endif
+                       child->argv=NULL;
+               } else if (child->group) {
+#ifndef __U_BOOT__
+                       final_printf("%s   begin group (subshell:%d)\n",ind, child->subshell);
+#endif
+                       ret_code = free_pipe_list(child->group,indent+3);
+                       final_printf("%s   end group\n",ind);
+               } else {
+                       final_printf("%s   (nil)\n",ind);
+               }
+#ifndef __U_BOOT__
+               for (r=child->redirects; r; r=rnext) {
+                       final_printf("%s   redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
+                       if (r->dup == -1) {
+                               /* guard against the case >$FOO, where foo is unset or blank */
+                               if (r->word.gl_pathv) {
+                                       final_printf(" %s\n", *r->word.gl_pathv);
+                                       globfree(&r->word);
+                               }
+                       } else {
+                               final_printf("&%d\n", r->dup);
+                       }
+                       rnext=r->next;
+                       free(r);
+               }
+               child->redirects=NULL;
+#endif
+       }
+       free(pi->progs);   /* children are an array, they get freed all at once */
+       pi->progs=NULL;
+       return ret_code;
+}
+
+static int free_pipe_list(struct pipe *head, int indent)
+{
+       int rcode=0;   /* if list has no members */
+       struct pipe *pi, *next;
+       char *ind = indenter(indent);
+       for (pi=head; pi; pi=next) {
+               final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
+               rcode = free_pipe(pi, indent);
+               final_printf("%s pipe followup code %d\n", ind, pi->followup);
+               next=pi->next;
+               pi->next=NULL;
+               free(pi);
+       }
+       return rcode;
+}
+
+/* Select which version we will use */
+static int run_list(struct pipe *pi)
+{
+       int rcode=0;
+#ifndef __U_BOOT__
+       if (fake_mode==0) {
+#endif
+               rcode = run_list_real(pi);
+#ifndef __U_BOOT__
+       }
+#endif
+       /* free_pipe_list has the side effect of clearing memory
+        * In the long run that function can be merged with run_list_real,
+        * but doing that now would hobble the debugging effort. */
+       free_pipe_list(pi,0);
+       return rcode;
+}
+
+/* The API for glob is arguably broken.  This routine pushes a non-matching
+ * string into the output structure, removing non-backslashed backslashes.
+ * If someone can prove me wrong, by performing this function within the
+ * original glob(3) api, feel free to rewrite this routine into oblivion.
+ * Return code (0 vs. GLOB_NOSPACE) matches glob(3).
+ * XXX broken if the last character is '\\', check that before calling.
+ */
+#ifndef __U_BOOT__
+static int globhack(const char *src, int flags, glob_t *pglob)
+{
+       int cnt=0, pathc;
+       const char *s;
+       char *dest;
+       for (cnt=1, s=src; s && *s; s++) {
+               if (*s == '\\') s++;
+               cnt++;
+       }
+       dest = malloc(cnt);
+       if (!dest) return GLOB_NOSPACE;
+       if (!(flags & GLOB_APPEND)) {
+               pglob->gl_pathv=NULL;
+               pglob->gl_pathc=0;
+               pglob->gl_offs=0;
+               pglob->gl_offs=0;
+       }
+       pathc = ++pglob->gl_pathc;
+       pglob->gl_pathv = realloc(pglob->gl_pathv, (pathc+1)*sizeof(*pglob->gl_pathv));
+       if (pglob->gl_pathv == NULL) return GLOB_NOSPACE;
+       pglob->gl_pathv[pathc-1]=dest;
+       pglob->gl_pathv[pathc]=NULL;
+       for (s=src; s && *s; s++, dest++) {
+               if (*s == '\\') s++;
+               *dest = *s;
+       }
+       *dest='\0';
+       return 0;
+}
+
+/* XXX broken if the last character is '\\', check that before calling */
+static int glob_needed(const char *s)
+{
+       for (; *s; s++) {
+               if (*s == '\\') s++;
+               if (strchr("*[?",*s)) return 1;
+       }
+       return 0;
+}
+
+#if 0
+static void globprint(glob_t *pglob)
+{
+       int i;
+       debug_printf("glob_t at %p:\n", pglob);
+       debug_printf("  gl_pathc=%d  gl_pathv=%p  gl_offs=%d  gl_flags=%d\n",
+               pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
+       for (i=0; i<pglob->gl_pathc; i++)
+               debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
+                       pglob->gl_pathv[i], pglob->gl_pathv[i]);
+}
+#endif
+
+static int xglob(o_string *dest, int flags, glob_t *pglob)
+{
+       int gr;
+
+       /* short-circuit for null word */
+       /* we can code this better when the debug_printf's are gone */
+       if (dest->length == 0) {
+               if (dest->nonnull) {
+                       /* bash man page calls this an "explicit" null */
+                       gr = globhack(dest->data, flags, pglob);
+                       debug_printf("globhack returned %d\n",gr);
+               } else {
+                       return 0;
+               }
+       } else if (glob_needed(dest->data)) {
+               gr = glob(dest->data, flags, NULL, pglob);
+               debug_printf("glob returned %d\n",gr);
+               if (gr == GLOB_NOMATCH) {
+                       /* quote removal, or more accurately, backslash removal */
+                       gr = globhack(dest->data, flags, pglob);
+                       debug_printf("globhack returned %d\n",gr);
+               }
+       } else {
+               gr = globhack(dest->data, flags, pglob);
+               debug_printf("globhack returned %d\n",gr);
+       }
+       if (gr == GLOB_NOSPACE)
+               error_msg_and_die("out of memory during glob");
+       if (gr != 0) { /* GLOB_ABORTED ? */
+               error_msg("glob(3) error %d",gr);
+       }
+       /* globprint(glob_target); */
+       return gr;
+}
+#endif
+
+#ifdef __U_BOOT__
+static char *get_dollar_var(char ch);
+#endif
+
+/* This is used to get/check local shell variables */
+char *get_local_var(const char *s)
+{
+       struct variables *cur;
+
+       if (!s)
+               return NULL;
+
+#ifdef __U_BOOT__
+       if (*s == '$')
+               return get_dollar_var(s[1]);
+#endif
+
+       for (cur = top_vars; cur; cur=cur->next)
+               if(strcmp(cur->name, s)==0)
+                       return cur->value;
+       return NULL;
+}
+
+/* This is used to set local shell variables
+   flg_export==0 if only local (not exporting) variable
+   flg_export==1 if "new" exporting environ
+   flg_export>1  if current startup environ (not call putenv()) */
+int set_local_var(const char *s, int flg_export)
+{
+       char *name, *value;
+       int result=0;
+       struct variables *cur;
+
+#ifdef __U_BOOT__
+       /* might be possible! */
+       if (!isalpha(*s))
+               return -1;
+#endif
+
+       name=strdup(s);
+
+#ifdef __U_BOOT__
+       if (getenv(name) != NULL) {
+               printf ("ERROR: "
+                               "There is a global environment variable with the same name.\n");
+               free(name);
+               return -1;
+       }
+#endif
+       /* Assume when we enter this function that we are already in
+        * NAME=VALUE format.  So the first order of business is to
+        * split 's' on the '=' into 'name' and 'value' */
+       value = strchr(name, '=');
+       if (value == NULL && ++value == NULL) {
+               free(name);
+               return -1;
+       }
+       *value++ = 0;
+
+       for(cur = top_vars; cur; cur = cur->next) {
+               if(strcmp(cur->name, name)==0)
+                       break;
+       }
+
+       if(cur) {
+               if(strcmp(cur->value, value)==0) {
+                       if(flg_export>0 && cur->flg_export==0)
+                               cur->flg_export=flg_export;
+                       else
+                               result++;
+               } else {
+                       if(cur->flg_read_only) {
+                               error_msg("%s: readonly variable", name);
+                               result = -1;
+                       } else {
+                               if(flg_export>0 || cur->flg_export>1)
+                                       cur->flg_export=1;
+                               free(cur->value);
+
+                               cur->value = strdup(value);
+                       }
+               }
+       } else {
+               cur = malloc(sizeof(struct variables));
+               if(!cur) {
+                       result = -1;
+               } else {
+                       cur->name = strdup(name);
+                       if (cur->name == NULL) {
+                               free(cur);
+                               result = -1;
+                       } else {
+                               struct variables *bottom = top_vars;
+                               cur->value = strdup(value);
+                               cur->next = NULL;
+                               cur->flg_export = flg_export;
+                               cur->flg_read_only = 0;
+                               while(bottom->next) bottom=bottom->next;
+                               bottom->next = cur;
+                       }
+               }
+       }
+
+#ifndef __U_BOOT__
+       if(result==0 && cur->flg_export==1) {
+               *(value-1) = '=';
+               result = putenv(name);
+       } else {
+#endif
+               free(name);
+#ifndef __U_BOOT__
+               if(result>0)            /* equivalent to previous set */
+                       result = 0;
+       }
+#endif
+       return result;
+}
+
+void unset_local_var(const char *name)
+{
+       struct variables *cur;
+
+       if (name) {
+               for (cur = top_vars; cur; cur=cur->next) {
+                       if(strcmp(cur->name, name)==0)
+                               break;
+               }
+               if (cur != NULL) {
+                       struct variables *next = top_vars;
+                       if(cur->flg_read_only) {
+                               error_msg("%s: readonly variable", name);
+                               return;
+                       } else {
+#ifndef __U_BOOT__
+                               if(cur->flg_export)
+                                       unsetenv(cur->name);
+#endif
+                               free(cur->name);
+                               free(cur->value);
+                               while (next->next != cur)
+                                       next = next->next;
+                               next->next = cur->next;
+                       }
+                       free(cur);
+               }
+       }
+}
+
+static int is_assignment(const char *s)
+{
+       if (s == NULL)
+               return 0;
+
+       if (!isalpha(*s)) return 0;
+       ++s;
+       while(isalnum(*s) || *s=='_') ++s;
+       return *s=='=';
+}
+
+#ifndef __U_BOOT__
+/* the src parameter allows us to peek forward to a possible &n syntax
+ * for file descriptor duplication, e.g., "2>&1".
+ * Return code is 0 normally, 1 if a syntax error is detected in src.
+ * Resource errors (in xmalloc) cause the process to exit */
+static int setup_redirect(struct p_context *ctx, int fd, redir_type style,
+       struct in_str *input)
+{
+       struct child_prog *child=ctx->child;
+       struct redir_struct *redir = child->redirects;
+       struct redir_struct *last_redir=NULL;
+
+       /* Create a new redir_struct and drop it onto the end of the linked list */
+       while(redir) {
+               last_redir=redir;
+               redir=redir->next;
+       }
+       redir = xmalloc(sizeof(struct redir_struct));
+       redir->next=NULL;
+       redir->word.gl_pathv=NULL;
+       if (last_redir) {
+               last_redir->next=redir;
+       } else {
+               child->redirects=redir;
+       }
+
+       redir->type=style;
+       redir->fd= (fd==-1) ? redir_table[style].default_fd : fd ;
+
+       debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip);
+
+       /* Check for a '2>&1' type redirect */
+       redir->dup = redirect_dup_num(input);
+       if (redir->dup == -2) return 1;  /* syntax error */
+       if (redir->dup != -1) {
+               /* Erik had a check here that the file descriptor in question
+                * is legit; I postpone that to "run time"
+                * A "-" representation of "close me" shows up as a -3 here */
+               debug_printf("Duplicating redirect '%d>&%d'\n", redir->fd, redir->dup);
+       } else {
+               /* We do _not_ try to open the file that src points to,
+                * since we need to return and let src be expanded first.
+                * Set ctx->pending_redirect, so we know what to do at the
+                * end of the next parsed word.
+                */
+               ctx->pending_redirect = redir;
+       }
+       return 0;
+}
+#endif
+
+static struct pipe *new_pipe(void)
+{
+       struct pipe *pi;
+       pi = xmalloc(sizeof(struct pipe));
+       pi->num_progs = 0;
+       pi->progs = NULL;
+       pi->next = NULL;
+       pi->followup = 0;  /* invalid */
+       pi->r_mode = RES_NONE;
+       return pi;
+}
+
+static void initialize_context(struct p_context *ctx)
+{
+       ctx->pipe=NULL;
+#ifndef __U_BOOT__
+       ctx->pending_redirect=NULL;
+#endif
+       ctx->child=NULL;
+       ctx->list_head=new_pipe();
+       ctx->pipe=ctx->list_head;
+       ctx->w=RES_NONE;
+       ctx->stack=NULL;
+#ifdef __U_BOOT__
+       ctx->old_flag=0;
+#endif
+       done_command(ctx);   /* creates the memory for working child */
+}
+
+/* normal return is 0
+ * if a reserved word is found, and processed, return 1
+ * should handle if, then, elif, else, fi, for, while, until, do, done.
+ * case, function, and select are obnoxious, save those for later.
+ */
+struct reserved_combo {
+       char *literal;
+       int code;
+       long flag;
+};
+/* Mostly a list of accepted follow-up reserved words.
+ * FLAG_END means we are done with the sequence, and are ready
+ * to turn the compound list into a command.
+ * FLAG_START means the word must start a new compound list.
+ */
+static struct reserved_combo reserved_list[] = {
+       { "if",    RES_IF,    FLAG_THEN | FLAG_START },
+       { "then",  RES_THEN,  FLAG_ELIF | FLAG_ELSE | FLAG_FI },
+       { "elif",  RES_ELIF,  FLAG_THEN },
+       { "else",  RES_ELSE,  FLAG_FI   },
+       { "fi",    RES_FI,    FLAG_END  },
+       { "for",   RES_FOR,   FLAG_IN   | FLAG_START },
+       { "while", RES_WHILE, FLAG_DO   | FLAG_START },
+       { "until", RES_UNTIL, FLAG_DO   | FLAG_START },
+       { "in",    RES_IN,    FLAG_DO   },
+       { "do",    RES_DO,    FLAG_DONE },
+       { "done",  RES_DONE,  FLAG_END  }
+};
+#define NRES (sizeof(reserved_list)/sizeof(struct reserved_combo))
+
+static int reserved_word(o_string *dest, struct p_context *ctx)
+{
+       struct reserved_combo *r;
+       for (r=reserved_list;
+               r<reserved_list+NRES; r++) {
+               if (strcmp(dest->data, r->literal) == 0) {
+                       debug_printf("found reserved word %s, code %d\n",r->literal,r->code);
+                       if (r->flag & FLAG_START) {
+                               struct p_context *new = xmalloc(sizeof(struct p_context));
+                               debug_printf("push stack\n");
+                               if (ctx->w == RES_IN || ctx->w == RES_FOR) {
+                                       syntax();
+                                       free(new);
+                                       ctx->w = RES_SNTX;
+                                       b_reset(dest);
+                                       return 1;
+                               }
+                               *new = *ctx;   /* physical copy */
+                               initialize_context(ctx);
+                               ctx->stack=new;
+                       } else if ( ctx->w == RES_NONE || ! (ctx->old_flag & (1<<r->code))) {
+                               syntax();
+                               ctx->w = RES_SNTX;
+                               b_reset(dest);
+                               return 1;
+                       }
+                       ctx->w=r->code;
+                       ctx->old_flag = r->flag;
+                       if (ctx->old_flag & FLAG_END) {
+                               struct p_context *old;
+                               debug_printf("pop stack\n");
+                               done_pipe(ctx,PIPE_SEQ);
+                               old = ctx->stack;
+                               old->child->group = ctx->list_head;
+#ifndef __U_BOOT__
+                               old->child->subshell = 0;
+#endif
+                               *ctx = *old;   /* physical copy */
+                               free(old);
+                       }
+                       b_reset (dest);
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+/* normal return is 0.
+ * Syntax or xglob errors return 1. */
+static int done_word(o_string *dest, struct p_context *ctx)
+{
+       struct child_prog *child=ctx->child;
+#ifndef __U_BOOT__
+       glob_t *glob_target;
+       int gr, flags = 0;
+#else
+       char *str, *s;
+       int argc, cnt;
+#endif
+
+       debug_printf("done_word: %s %p\n", dest->data, child);
+       if (dest->length == 0 && !dest->nonnull) {
+               debug_printf("  true null, ignored\n");
+               return 0;
+       }
+#ifndef __U_BOOT__
+       if (ctx->pending_redirect) {
+               glob_target = &ctx->pending_redirect->word;
+       } else {
+#endif
+               if (child->group) {
+                       syntax();
+                       return 1;  /* syntax error, groups and arglists don't mix */
+               }
+               if (!child->argv && (ctx->type & FLAG_PARSE_SEMICOLON)) {
+                       debug_printf("checking %s for reserved-ness\n",dest->data);
+                       if (reserved_word(dest,ctx)) return ctx->w==RES_SNTX;
+               }
+#ifndef __U_BOOT__
+               glob_target = &child->glob_result;
+               if (child->argv) flags |= GLOB_APPEND;
+#else
+               for (cnt = 1, s = dest->data; s && *s; s++) {
+                       if (*s == '\\') s++;
+                       cnt++;
+               }
+               str = malloc(cnt);
+               if (!str) return 1;
+               if ( child->argv == NULL) {
+                       child->argc=0;
+               }
+               argc = ++child->argc;
+               child->argv = realloc(child->argv, (argc+1)*sizeof(*child->argv));
+               if (child->argv == NULL) return 1;
+               child->argv_nonnull = realloc(child->argv_nonnull,
+                                       (argc+1)*sizeof(*child->argv_nonnull));
+               if (child->argv_nonnull == NULL)
+                       return 1;
+               child->argv[argc-1]=str;
+               child->argv_nonnull[argc-1] = dest->nonnull;
+               child->argv[argc]=NULL;
+               child->argv_nonnull[argc] = 0;
+               for (s = dest->data; s && *s; s++,str++) {
+                       if (*s == '\\') s++;
+                       *str = *s;
+               }
+               *str = '\0';
+#endif
+#ifndef __U_BOOT__
+       }
+       gr = xglob(dest, flags, glob_target);
+       if (gr != 0) return 1;
+#endif
+
+       b_reset(dest);
+#ifndef __U_BOOT__
+       if (ctx->pending_redirect) {
+               ctx->pending_redirect=NULL;
+               if (glob_target->gl_pathc != 1) {
+                       error_msg("ambiguous redirect");
+                       return 1;
+               }
+       } else {
+               child->argv = glob_target->gl_pathv;
+       }
+#endif
+       if (ctx->w == RES_FOR) {
+               done_word(dest,ctx);
+               done_pipe(ctx,PIPE_SEQ);
+       }
+       return 0;
+}
+
+/* The only possible error here is out of memory, in which case
+ * xmalloc exits. */
+static int done_command(struct p_context *ctx)
+{
+       /* The child is really already in the pipe structure, so
+        * advance the pipe counter and make a new, null child.
+        * Only real trickiness here is that the uncommitted
+        * child structure, to which ctx->child points, is not
+        * counted in pi->num_progs. */
+       struct pipe *pi=ctx->pipe;
+       struct child_prog *prog=ctx->child;
+
+       if (prog && prog->group == NULL
+                && prog->argv == NULL
+#ifndef __U_BOOT__
+                && prog->redirects == NULL) {
+#else
+                                                                               ) {
+#endif
+               debug_printf("done_command: skipping null command\n");
+               return 0;
+       } else if (prog) {
+               pi->num_progs++;
+               debug_printf("done_command: num_progs incremented to %d\n",pi->num_progs);
+       } else {
+               debug_printf("done_command: initializing\n");
+       }
+       pi->progs = xrealloc(pi->progs, sizeof(*pi->progs) * (pi->num_progs+1));
+
+       prog = pi->progs + pi->num_progs;
+#ifndef __U_BOOT__
+       prog->redirects = NULL;
+#endif
+       prog->argv = NULL;
+       prog->argv_nonnull = NULL;
+#ifndef __U_BOOT__
+       prog->is_stopped = 0;
+#endif
+       prog->group = NULL;
+#ifndef __U_BOOT__
+       prog->glob_result.gl_pathv = NULL;
+       prog->family = pi;
+#endif
+       prog->sp = 0;
+       ctx->child = prog;
+       prog->type = ctx->type;
+
+       /* but ctx->pipe and ctx->list_head remain unchanged */
+       return 0;
+}
+
+static int done_pipe(struct p_context *ctx, pipe_style type)
+{
+       struct pipe *new_p;
+       done_command(ctx);  /* implicit closure of previous command */
+       debug_printf("done_pipe, type %d\n", type);
+       ctx->pipe->followup = type;
+       ctx->pipe->r_mode = ctx->w;
+       new_p=new_pipe();
+       ctx->pipe->next = new_p;
+       ctx->pipe = new_p;
+       ctx->child = NULL;
+       done_command(ctx);  /* set up new pipe to accept commands */
+       return 0;
+}
+
+#ifndef __U_BOOT__
+/* peek ahead in the in_str to find out if we have a "&n" construct,
+ * as in "2>&1", that represents duplicating a file descriptor.
+ * returns either -2 (syntax error), -1 (no &), or the number found.
+ */
+static int redirect_dup_num(struct in_str *input)
+{
+       int ch, d=0, ok=0;
+       ch = b_peek(input);
+       if (ch != '&') return -1;
+
+       b_getch(input);  /* get the & */
+       ch=b_peek(input);
+       if (ch == '-') {
+               b_getch(input);
+               return -3;  /* "-" represents "close me" */
+       }
+       while (isdigit(ch)) {
+               d = d*10+(ch-'0');
+               ok=1;
+               b_getch(input);
+               ch = b_peek(input);
+       }
+       if (ok) return d;
+
+       error_msg("ambiguous redirect");
+       return -2;
+}
+
+/* If a redirect is immediately preceded by a number, that number is
+ * supposed to tell which file descriptor to redirect.  This routine
+ * looks for such preceding numbers.  In an ideal world this routine
+ * needs to handle all the following classes of redirects...
+ *     echo 2>foo     # redirects fd  2 to file "foo", nothing passed to echo
+ *     echo 49>foo    # redirects fd 49 to file "foo", nothing passed to echo
+ *     echo -2>foo    # redirects fd  1 to file "foo",    "-2" passed to echo
+ *     echo 49x>foo   # redirects fd  1 to file "foo",   "49x" passed to echo
+ * A -1 output from this program means no valid number was found, so the
+ * caller should use the appropriate default for this redirection.
+ */
+static int redirect_opt_num(o_string *o)
+{
+       int num;
+
+       if (o->length==0) return -1;
+       for(num=0; num<o->length; num++) {
+               if (!isdigit(*(o->data+num))) {
+                       return -1;
+               }
+       }
+       /* reuse num (and save an int) */
+       num=atoi(o->data);
+       b_reset(o);
+       return num;
+}
+
+FILE *generate_stream_from_list(struct pipe *head)
+{
+       FILE *pf;
+#if 1
+       int pid, channel[2];
+       if (pipe(channel)<0) perror_msg_and_die("pipe");
+       pid=fork();
+       if (pid<0) {
+               perror_msg_and_die("fork");
+       } else if (pid==0) {
+               close(channel[0]);
+               if (channel[1] != 1) {
+                       dup2(channel[1],1);
+                       close(channel[1]);
+               }
+#if 0
+#define SURROGATE "surrogate response"
+               write(1,SURROGATE,sizeof(SURROGATE));
+               _exit(run_list(head));
+#else
+               _exit(run_list_real(head));   /* leaks memory */
+#endif
+       }
+       debug_printf("forked child %d\n",pid);
+       close(channel[1]);
+       pf = fdopen(channel[0],"r");
+       debug_printf("pipe on FILE *%p\n",pf);
+#else
+       free_pipe_list(head,0);
+       pf=popen("echo surrogate response","r");
+       debug_printf("started fake pipe on FILE *%p\n",pf);
+#endif
+       return pf;
+}
+
+/* this version hacked for testing purposes */
+/* return code is exit status of the process that is run. */
+static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end)
+{
+       int retcode;
+       o_string result=NULL_O_STRING;
+       struct p_context inner;
+       FILE *p;
+       struct in_str pipe_str;
+       initialize_context(&inner);
+
+       /* recursion to generate command */
+       retcode = parse_stream(&result, &inner, input, subst_end);
+       if (retcode != 0) return retcode;  /* syntax error or EOF */
+       done_word(&result, &inner);
+       done_pipe(&inner, PIPE_SEQ);
+       b_free(&result);
+
+       p=generate_stream_from_list(inner.list_head);
+       if (p==NULL) return 1;
+       mark_open(fileno(p));
+       setup_file_in_str(&pipe_str, p);
+
+       /* now send results of command back into original context */
+       retcode = parse_stream(dest, ctx, &pipe_str, '\0');
+       /* XXX In case of a syntax error, should we try to kill the child?
+        * That would be tough to do right, so just read until EOF. */
+       if (retcode == 1) {
+               while (b_getch(&pipe_str)!=EOF) { /* discard */ };
+       }
+
+       debug_printf("done reading from pipe, pclose()ing\n");
+       /* This is the step that wait()s for the child.  Should be pretty
+        * safe, since we just read an EOF from its stdout.  We could try
+        * to better, by using wait(), and keeping track of background jobs
+        * at the same time.  That would be a lot of work, and contrary
+        * to the KISS philosophy of this program. */
+       mark_closed(fileno(p));
+       retcode=pclose(p);
+       free_pipe_list(inner.list_head,0);
+       debug_printf("pclosed, retcode=%d\n",retcode);
+       /* XXX this process fails to trim a single trailing newline */
+       return retcode;
+}
+
+static int parse_group(o_string *dest, struct p_context *ctx,
+       struct in_str *input, int ch)
+{
+       int rcode, endch=0;
+       struct p_context sub;
+       struct child_prog *child = ctx->child;
+       if (child->argv) {
+               syntax();
+               return 1;  /* syntax error, groups and arglists don't mix */
+       }
+       initialize_context(&sub);
+       switch(ch) {
+               case '(': endch=')'; child->subshell=1; break;
+               case '{': endch='}'; break;
+               default: syntax();   /* really logic error */
+       }
+       rcode=parse_stream(dest,&sub,input,endch);
+       done_word(dest,&sub); /* finish off the final word in the subcontext */
+       done_pipe(&sub, PIPE_SEQ);  /* and the final command there, too */
+       child->group = sub.list_head;
+       return rcode;
+       /* child remains "open", available for possible redirects */
+}
+#endif
+
+/* basically useful version until someone wants to get fancier,
+ * see the bash man page under "Parameter Expansion" */
+static char *lookup_param(char *src)
+{
+       char *p;
+       char *sep;
+       char *default_val = NULL;
+       int assign = 0;
+       int expand_empty = 0;
+
+       if (!src)
+               return NULL;
+
+       sep = strchr(src, ':');
+
+       if (sep) {
+               *sep = '\0';
+               if (*(sep + 1) == '-')
+                       default_val = sep+2;
+               if (*(sep + 1) == '=') {
+                       default_val = sep+2;
+                       assign = 1;
+               }
+               if (*(sep + 1) == '+') {
+                       default_val = sep+2;
+                       expand_empty = 1;
+               }
+       }
+
+       p = getenv(src);
+       if (!p)
+               p = get_local_var(src);
+
+       if (!p || strlen(p) == 0) {
+               p = default_val;
+               if (assign) {
+                       char *var = malloc(strlen(src)+strlen(default_val)+2);
+                       if (var) {
+                               sprintf(var, "%s=%s", src, default_val);
+                               set_local_var(var, 0);
+                       }
+                       free(var);
+               }
+       } else if (expand_empty) {
+               p += strlen(p);
+       }
+
+       if (sep)
+               *sep = ':';
+
+       return p;
+}
+
+#ifdef __U_BOOT__
+static char *get_dollar_var(char ch)
+{
+       static char buf[40];
+
+       buf[0] = '\0';
+       switch (ch) {
+               case '?':
+                       sprintf(buf, "%u", (unsigned int)last_return_code);
+                       break;
+               default:
+                       return NULL;
+       }
+       return buf;
+}
+#endif
+
+/* return code: 0 for OK, 1 for syntax error */
+static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
+{
+#ifndef __U_BOOT__
+       int i, advance=0;
+#else
+       int advance=0;
+#endif
+#ifndef __U_BOOT__
+       char sep[]=" ";
+#endif
+       int ch = input->peek(input);  /* first character after the $ */
+       debug_printf("handle_dollar: ch=%c\n",ch);
+       if (isalpha(ch)) {
+               b_addchr(dest, SPECIAL_VAR_SYMBOL);
+               ctx->child->sp++;
+               while(ch=b_peek(input),isalnum(ch) || ch=='_') {
+                       b_getch(input);
+                       b_addchr(dest,ch);
+               }
+               b_addchr(dest, SPECIAL_VAR_SYMBOL);
+#ifndef __U_BOOT__
+       } else if (isdigit(ch)) {
+               i = ch-'0';  /* XXX is $0 special? */
+               if (i<global_argc) {
+                       parse_string(dest, ctx, global_argv[i]); /* recursion */
+               }
+               advance = 1;
+#endif
+       } else switch (ch) {
+#ifndef __U_BOOT__
+               case '$':
+                       b_adduint(dest,getpid());
+                       advance = 1;
+                       break;
+               case '!':
+                       if (last_bg_pid > 0) b_adduint(dest, last_bg_pid);
+                       advance = 1;
+                       break;
+#endif
+               case '?':
+#ifndef __U_BOOT__
+                       b_adduint(dest,last_return_code);
+#else
+                       ctx->child->sp++;
+                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
+                       b_addchr(dest, '$');
+                       b_addchr(dest, '?');
+                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
+#endif
+                       advance = 1;
+                       break;
+#ifndef __U_BOOT__
+               case '#':
+                       b_adduint(dest,global_argc ? global_argc-1 : 0);
+                       advance = 1;
+                       break;
+#endif
+               case '{':
+                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
+                       ctx->child->sp++;
+                       b_getch(input);
+                       /* XXX maybe someone will try to escape the '}' */
+                       while(ch=b_getch(input),ch!=EOF && ch!='}') {
+                               b_addchr(dest,ch);
+                       }
+                       if (ch != '}') {
+                               syntax();
+                               return 1;
+                       }
+                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
+                       break;
+#ifndef __U_BOOT__
+               case '(':
+                       b_getch(input);
+                       process_command_subs(dest, ctx, input, ')');
+                       break;
+               case '*':
+                       sep[0]=ifs[0];
+                       for (i=1; i<global_argc; i++) {
+                               parse_string(dest, ctx, global_argv[i]);
+                               if (i+1 < global_argc) parse_string(dest, ctx, sep);
+                       }
+                       break;
+               case '@':
+               case '-':
+               case '_':
+                       /* still unhandled, but should be eventually */
+                       error_msg("unhandled syntax: $%c",ch);
+                       return 1;
+                       break;
+#endif
+               default:
+                       b_addqchr(dest,'$',dest->quote);
+       }
+       /* Eat the character if the flag was set.  If the compiler
+        * is smart enough, we could substitute "b_getch(input);"
+        * for all the "advance = 1;" above, and also end up with
+        * a nice size-optimized program.  Hah!  That'll be the day.
+        */
+       if (advance) b_getch(input);
+       return 0;
+}
+
+#ifndef __U_BOOT__
+int parse_string(o_string *dest, struct p_context *ctx, const char *src)
+{
+       struct in_str foo;
+       setup_string_in_str(&foo, src);
+       return parse_stream(dest, ctx, &foo, '\0');
+}
+#endif
+
+/* return code is 0 for normal exit, 1 for syntax error */
+static int parse_stream(o_string *dest, struct p_context *ctx,
+                       struct in_str *input, int end_trigger)
+{
+       unsigned int ch, m;
+#ifndef __U_BOOT__
+       int redir_fd;
+       redir_type redir_style;
+#endif
+       int next;
+
+       /* Only double-quote state is handled in the state variable dest->quote.
+        * A single-quote triggers a bypass of the main loop until its mate is
+        * found.  When recursing, quote state is passed in via dest->quote. */
+
+       debug_printf("parse_stream, end_trigger=%d\n",end_trigger);
+       while ((ch=b_getch(input))!=EOF) {
+               m = map[ch];
+#ifdef __U_BOOT__
+               if (input->__promptme == 0) return 1;
+#endif
+               next = (ch == '\n') ? 0 : b_peek(input);
+
+               debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d - %c\n",
+                       ch >= ' ' ? ch : '.', ch, m,
+                       dest->quote, ctx->stack == NULL ? '*' : '.');
+
+               if (m==0 || ((m==1 || m==2) && dest->quote)) {
+                       b_addqchr(dest, ch, dest->quote);
+               } else {
+                       if (m==2) {  /* unquoted IFS */
+                               if (done_word(dest, ctx)) {
+                                       return 1;
+                               }
+                               /* If we aren't performing a substitution, treat a newline as a
+                                * command separator.  */
+                               if (end_trigger != '\0' && ch=='\n')
+                                       done_pipe(ctx,PIPE_SEQ);
+                       }
+                       if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
+                               debug_printf("leaving parse_stream (triggered)\n");
+                               return 0;
+                       }
+#if 0
+                       if (ch=='\n') {
+                               /* Yahoo!  Time to run with it! */
+                               done_pipe(ctx,PIPE_SEQ);
+                               run_list(ctx->list_head);
+                               initialize_context(ctx);
+                       }
+#endif
+                       if (m!=2) switch (ch) {
+               case '#':
+                       if (dest->length == 0 && !dest->quote) {
+                               while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
+                       } else {
+                               b_addqchr(dest, ch, dest->quote);
+                       }
+                       break;
+               case '\\':
+                       if (next == EOF) {
+                               syntax();
+                               return 1;
+                       }
+                       b_addqchr(dest, '\\', dest->quote);
+                       b_addqchr(dest, b_getch(input), dest->quote);
+                       break;
+               case '$':
+                       if (handle_dollar(dest, ctx, input)!=0) return 1;
+                       break;
+               case '\'':
+                       dest->nonnull = 1;
+                       while(ch=b_getch(input),ch!=EOF && ch!='\'') {
+#ifdef __U_BOOT__
+                               if(input->__promptme == 0) return 1;
+#endif
+                               b_addchr(dest,ch);
+                       }
+                       if (ch==EOF) {
+                               syntax();
+                               return 1;
+                       }
+                       break;
+               case '"':
+                       dest->nonnull = 1;
+                       dest->quote = !dest->quote;
+                       break;
+#ifndef __U_BOOT__
+               case '`':
+                       process_command_subs(dest, ctx, input, '`');
+                       break;
+               case '>':
+                       redir_fd = redirect_opt_num(dest);
+                       done_word(dest, ctx);
+                       redir_style=REDIRECT_OVERWRITE;
+                       if (next == '>') {
+                               redir_style=REDIRECT_APPEND;
+                               b_getch(input);
+                       } else if (next == '(') {
+                               syntax();   /* until we support >(list) Process Substitution */
+                               return 1;
+                       }
+                       setup_redirect(ctx, redir_fd, redir_style, input);
+                       break;
+               case '<':
+                       redir_fd = redirect_opt_num(dest);
+                       done_word(dest, ctx);
+                       redir_style=REDIRECT_INPUT;
+                       if (next == '<') {
+                               redir_style=REDIRECT_HEREIS;
+                               b_getch(input);
+                       } else if (next == '>') {
+                               redir_style=REDIRECT_IO;
+                               b_getch(input);
+                       } else if (next == '(') {
+                               syntax();   /* until we support <(list) Process Substitution */
+                               return 1;
+                       }
+                       setup_redirect(ctx, redir_fd, redir_style, input);
+                       break;
+#endif
+               case ';':
+                       done_word(dest, ctx);
+                       done_pipe(ctx,PIPE_SEQ);
+                       break;
+               case '&':
+                       done_word(dest, ctx);
+                       if (next=='&') {
+                               b_getch(input);
+                               done_pipe(ctx,PIPE_AND);
+                       } else {
+#ifndef __U_BOOT__
+                               done_pipe(ctx,PIPE_BG);
+#else
+                               syntax_err();
+                               return 1;
+#endif
+                       }
+                       break;
+               case '|':
+                       done_word(dest, ctx);
+                       if (next=='|') {
+                               b_getch(input);
+                               done_pipe(ctx,PIPE_OR);
+                       } else {
+                               /* we could pick up a file descriptor choice here
+                                * with redirect_opt_num(), but bash doesn't do it.
+                                * "echo foo 2| cat" yields "foo 2". */
+#ifndef __U_BOOT__
+                               done_command(ctx);
+#else
+                               syntax_err();
+                               return 1;
+#endif
+                       }
+                       break;
+#ifndef __U_BOOT__
+               case '(':
+               case '{':
+                       if (parse_group(dest, ctx, input, ch)!=0) return 1;
+                       break;
+               case ')':
+               case '}':
+                       syntax();   /* Proper use of this character caught by end_trigger */
+                       return 1;
+                       break;
+#endif
+               case SUBSTED_VAR_SYMBOL:
+                       dest->nonnull = 1;
+                       while (ch = b_getch(input), ch != EOF &&
+                           ch != SUBSTED_VAR_SYMBOL) {
+                               debug_printf("subst, pass=%d\n", ch);
+                               if (input->__promptme == 0)
+                                       return 1;
+                               b_addchr(dest, ch);
+                       }
+                       debug_printf("subst, term=%d\n", ch);
+                       if (ch == EOF) {
+                               syntax();
+                               return 1;
+                       }
+                       break;
+               default:
+                       syntax();   /* this is really an internal logic error */
+                       return 1;
+                       }
+               }
+       }
+       /* complain if quote?  No, maybe we just finished a command substitution
+        * that was quoted.  Example:
+        * $ echo "`cat foo` plus more"
+        * and we just got the EOF generated by the subshell that ran "cat foo"
+        * The only real complaint is if we got an EOF when end_trigger != '\0',
+        * that is, we were really supposed to get end_trigger, and never got
+        * one before the EOF.  Can't use the standard "syntax error" return code,
+        * so that parse_stream_outer can distinguish the EOF and exit smoothly. */
+       debug_printf("leaving parse_stream (EOF)\n");
+       if (end_trigger != '\0') return -1;
+       return 0;
+}
+
+static void mapset(const unsigned char *set, int code)
+{
+       const unsigned char *s;
+       for (s=set; *s; s++) map[*s] = code;
+}
+
+static void update_ifs_map(void)
+{
+       /* char *ifs and char map[256] are both globals. */
+       ifs = (uchar *)getenv("IFS");
+       if (ifs == NULL) ifs=(uchar *)" \t\n";
+       /* Precompute a list of 'flow through' behavior so it can be treated
+        * quickly up front.  Computation is necessary because of IFS.
+        * Special case handling of IFS == " \t\n" is not implemented.
+        * The map[] array only really needs two bits each, and on most machines
+        * that would be faster because of the reduced L1 cache footprint.
+        */
+       memset(map,0,sizeof(map)); /* most characters flow through always */
+#ifndef __U_BOOT__
+       mapset((uchar *)"\\$'\"`", 3);      /* never flow through */
+       mapset((uchar *)"<>;&|(){}#", 1);   /* flow through if quoted */
+#else
+       {
+               uchar subst[2] = {SUBSTED_VAR_SYMBOL, 0};
+               mapset(subst, 3);       /* never flow through */
+       }
+       mapset((uchar *)"\\$'\"", 3);       /* never flow through */
+       mapset((uchar *)";&|#", 1);         /* flow through if quoted */
+#endif
+       mapset(ifs, 2);            /* also flow through if quoted */
+}
+
+/* most recursion does not come through here, the exeception is
+ * from builtin_source() */
+static int parse_stream_outer(struct in_str *inp, int flag)
+{
+
+       struct p_context ctx;
+       o_string temp=NULL_O_STRING;
+       int rcode;
+#ifdef __U_BOOT__
+       int code = 0;
+#endif
+       do {
+               ctx.type = flag;
+               initialize_context(&ctx);
+               update_ifs_map();
+               if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) mapset((uchar *)";$&|", 0);
+               inp->promptmode=1;
+               rcode = parse_stream(&temp, &ctx, inp, '\n');
+#ifdef __U_BOOT__
+               if (rcode == 1) flag_repeat = 0;
+#endif
+               if (rcode != 1 && ctx.old_flag != 0) {
+                       syntax();
+#ifdef __U_BOOT__
+                       flag_repeat = 0;
+#endif
+               }
+               if (rcode != 1 && ctx.old_flag == 0) {
+                       done_word(&temp, &ctx);
+                       done_pipe(&ctx,PIPE_SEQ);
+#ifndef __U_BOOT__
+                       run_list(ctx.list_head);
+#else
+                       code = run_list(ctx.list_head);
+                       if (code == -2) {       /* exit */
+                               b_free(&temp);
+                               code = 0;
+                               /* XXX hackish way to not allow exit from main loop */
+                               if (inp->peek == file_peek) {
+                                       printf("exit not allowed from main input shell.\n");
+                                       continue;
+                               }
+                               break;
+                       }
+                       if (code == -1)
+                           flag_repeat = 0;
+#endif
+               } else {
+                       if (ctx.old_flag != 0) {
+                               free(ctx.stack);
+                               b_reset(&temp);
+                       }
+#ifdef __U_BOOT__
+                       if (inp->__promptme == 0) printf("<INTERRUPT>\n");
+                       inp->__promptme = 1;
+#endif
+                       temp.nonnull = 0;
+                       temp.quote = 0;
+                       inp->p = NULL;
+                       free_pipe_list(ctx.list_head,0);
+               }
+               b_free(&temp);
+       } while (rcode != -1 && !(flag & FLAG_EXIT_FROM_LOOP));   /* loop on syntax errors, return on EOF */
+#ifndef __U_BOOT__
+       return 0;
+#else
+       return (code != 0) ? 1 : 0;
+#endif /* __U_BOOT__ */
+}
+
+#ifndef __U_BOOT__
+static int parse_string_outer(const char *s, int flag)
+#else
+int parse_string_outer(const char *s, int flag)
+#endif /* __U_BOOT__ */
+{
+       struct in_str input;
+#ifdef __U_BOOT__
+       char *p = NULL;
+       int rcode;
+       if ( !s || !*s)
+               return 1;
+       if (!(p = strchr(s, '\n')) || *++p) {
+               p = xmalloc(strlen(s) + 2);
+               strcpy(p, s);
+               strcat(p, "\n");
+               setup_string_in_str(&input, p);
+               rcode = parse_stream_outer(&input, flag);
+               free(p);
+               return rcode;
+       } else {
+#endif
+       setup_string_in_str(&input, s);
+       return parse_stream_outer(&input, flag);
+#ifdef __U_BOOT__
+       }
+#endif
+}
+
+#ifndef __U_BOOT__
+static int parse_file_outer(FILE *f)
+#else
+int parse_file_outer(void)
+#endif
+{
+       int rcode;
+       struct in_str input;
+#ifndef __U_BOOT__
+       setup_file_in_str(&input, f);
+#else
+       setup_file_in_str(&input);
+#endif
+       rcode = parse_stream_outer(&input, FLAG_PARSE_SEMICOLON);
+       return rcode;
+}
+
+#ifdef __U_BOOT__
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+static void u_boot_hush_reloc(void)
+{
+       unsigned long addr;
+       struct reserved_combo *r;
+
+       for (r=reserved_list; r<reserved_list+NRES; r++) {
+               addr = (ulong) (r->literal) + gd->reloc_off;
+               r->literal = (char *)addr;
+       }
+}
+#endif
+
+int u_boot_hush_start(void)
+{
+       if (top_vars == NULL) {
+               top_vars = malloc(sizeof(struct variables));
+               top_vars->name = "HUSH_VERSION";
+               top_vars->value = "0.01";
+               top_vars->next = NULL;
+               top_vars->flg_export = 0;
+               top_vars->flg_read_only = 1;
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+               u_boot_hush_reloc();
+#endif
+       }
+       return 0;
+}
+
+static void *xmalloc(size_t size)
+{
+       void *p = NULL;
+
+       if (!(p = malloc(size))) {
+           printf("ERROR : memory not allocated\n");
+           for(;;);
+       }
+       return p;
+}
+
+static void *xrealloc(void *ptr, size_t size)
+{
+       void *p = NULL;
+
+       if (!(p = realloc(ptr, size))) {
+           printf("ERROR : memory not allocated\n");
+           for(;;);
+       }
+       return p;
+}
+#endif /* __U_BOOT__ */
+
+#ifndef __U_BOOT__
+/* Make sure we have a controlling tty.  If we get started under a job
+ * aware app (like bash for example), make sure we are now in charge so
+ * we don't fight over who gets the foreground */
+static void setup_job_control(void)
+{
+       static pid_t shell_pgrp;
+       /* Loop until we are in the foreground.  */
+       while (tcgetpgrp (shell_terminal) != (shell_pgrp = getpgrp ()))
+               kill (- shell_pgrp, SIGTTIN);
+
+       /* Ignore interactive and job-control signals.  */
+       signal(SIGINT, SIG_IGN);
+       signal(SIGQUIT, SIG_IGN);
+       signal(SIGTERM, SIG_IGN);
+       signal(SIGTSTP, SIG_IGN);
+       signal(SIGTTIN, SIG_IGN);
+       signal(SIGTTOU, SIG_IGN);
+       signal(SIGCHLD, SIG_IGN);
+
+       /* Put ourselves in our own process group.  */
+       setsid();
+       shell_pgrp = getpid ();
+       setpgid (shell_pgrp, shell_pgrp);
+
+       /* Grab control of the terminal.  */
+       tcsetpgrp(shell_terminal, shell_pgrp);
+}
+
+int hush_main(int argc, char * const *argv)
+{
+       int opt;
+       FILE *input;
+       char **e = environ;
+
+       /* XXX what should these be while sourcing /etc/profile? */
+       global_argc = argc;
+       global_argv = argv;
+
+       /* (re?) initialize globals.  Sometimes hush_main() ends up calling
+        * hush_main(), therefore we cannot rely on the BSS to zero out this
+        * stuff.  Reset these to 0 every time. */
+       ifs = NULL;
+       /* map[] is taken care of with call to update_ifs_map() */
+       fake_mode = 0;
+       interactive = 0;
+       close_me_head = NULL;
+       last_bg_pid = 0;
+       job_list = NULL;
+       last_jobid = 0;
+
+       /* Initialize some more globals to non-zero values */
+       set_cwd();
+#ifdef CONFIG_FEATURE_COMMAND_EDITING
+       cmdedit_set_initial_prompt();
+#else
+       PS1 = NULL;
+#endif
+       PS2 = "> ";
+
+       /* initialize our shell local variables with the values
+        * currently living in the environment */
+       if (e) {
+               for (; *e; e++)
+                       set_local_var(*e, 2);   /* without call putenv() */
+       }
+
+       last_return_code=EXIT_SUCCESS;
+
+
+       if (argv[0] && argv[0][0] == '-') {
+               debug_printf("\nsourcing /etc/profile\n");
+               if ((input = fopen("/etc/profile", "r")) != NULL) {
+                       mark_open(fileno(input));
+                       parse_file_outer(input);
+                       mark_closed(fileno(input));
+                       fclose(input);
+               }
+       }
+       input=stdin;
+
+       while ((opt = getopt(argc, argv, "c:xif")) > 0) {
+               switch (opt) {
+                       case 'c':
+                               {
+                                       global_argv = argv+optind;
+                                       global_argc = argc-optind;
+                                       opt = parse_string_outer(optarg, FLAG_PARSE_SEMICOLON);
+                                       goto final_return;
+                               }
+                               break;
+                       case 'i':
+                               interactive++;
+                               break;
+                       case 'f':
+                               fake_mode++;
+                               break;
+                       default:
+#ifndef BB_VER
+                               fprintf(stderr, "Usage: sh [FILE]...\n"
+                                               "   or: sh -c command [args]...\n\n");
+                               exit(EXIT_FAILURE);
+#else
+                               show_usage();
+#endif
+               }
+       }
+       /* A shell is interactive if the `-i' flag was given, or if all of
+        * the following conditions are met:
+        *        no -c command
+        *    no arguments remaining or the -s flag given
+        *    standard input is a terminal
+        *    standard output is a terminal
+        *    Refer to Posix.2, the description of the `sh' utility. */
+       if (argv[optind]==NULL && input==stdin &&
+                       isatty(fileno(stdin)) && isatty(fileno(stdout))) {
+               interactive++;
+       }
+
+       debug_printf("\ninteractive=%d\n", interactive);
+       if (interactive) {
+               /* Looks like they want an interactive shell */
+#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
+               printf( "\n\n" BB_BANNER " hush - the humble shell v0.01 (testing)\n");
+               printf( "Enter 'help' for a list of built-in commands.\n\n");
+#endif
+               setup_job_control();
+       }
+
+       if (argv[optind]==NULL) {
+               opt=parse_file_outer(stdin);
+               goto final_return;
+       }
+
+       debug_printf("\nrunning script '%s'\n", argv[optind]);
+       global_argv = argv+optind;
+       global_argc = argc-optind;
+       input = xfopen(argv[optind], "r");
+       opt = parse_file_outer(input);
+
+#ifdef CONFIG_FEATURE_CLEAN_UP
+       fclose(input);
+       if (cwd && cwd != unknown)
+               free((char*)cwd);
+       {
+               struct variables *cur, *tmp;
+               for(cur = top_vars; cur; cur = tmp) {
+                       tmp = cur->next;
+                       if (!cur->flg_read_only) {
+                               free(cur->name);
+                               free(cur->value);
+                               free(cur);
+                       }
+               }
+       }
+#endif
+
+final_return:
+       return(opt?opt:last_return_code);
+}
+#endif
+
+static char *insert_var_value(char *inp)
+{
+       return insert_var_value_sub(inp, 0);
+}
+
+static char *insert_var_value_sub(char *inp, int tag_subst)
+{
+       int res_str_len = 0;
+       int len;
+       int done = 0;
+       char *p, *p1, *res_str = NULL;
+
+       while ((p = strchr(inp, SPECIAL_VAR_SYMBOL))) {
+               /* check the beginning of the string for normal charachters */
+               if (p != inp) {
+                       /* copy any charachters to the result string */
+                       len = p - inp;
+                       res_str = xrealloc(res_str, (res_str_len + len));
+                       strncpy((res_str + res_str_len), inp, len);
+                       res_str_len += len;
+               }
+               inp = ++p;
+               /* find the ending marker */
+               p = strchr(inp, SPECIAL_VAR_SYMBOL);
+               *p = '\0';
+               /* look up the value to substitute */
+               if ((p1 = lookup_param(inp))) {
+                       if (tag_subst)
+                               len = res_str_len + strlen(p1) + 2;
+                       else
+                               len = res_str_len + strlen(p1);
+                       res_str = xrealloc(res_str, (1 + len));
+                       if (tag_subst) {
+                               /*
+                                * copy the variable value to the result
+                                * string
+                                */
+                               strcpy((res_str + res_str_len + 1), p1);
+
+                               /*
+                                * mark the replaced text to be accepted as
+                                * is
+                                */
+                               res_str[res_str_len] = SUBSTED_VAR_SYMBOL;
+                               res_str[res_str_len + 1 + strlen(p1)] =
+                                       SUBSTED_VAR_SYMBOL;
+                       } else
+                               /*
+                                * copy the variable value to the result
+                                * string
+                                */
+                               strcpy((res_str + res_str_len), p1);
+
+                       res_str_len = len;
+               }
+               *p = SPECIAL_VAR_SYMBOL;
+               inp = ++p;
+               done = 1;
+       }
+       if (done) {
+               res_str = xrealloc(res_str, (1 + res_str_len + strlen(inp)));
+               strcpy((res_str + res_str_len), inp);
+               while ((p = strchr(res_str, '\n'))) {
+                       *p = ' ';
+               }
+       }
+       return (res_str == NULL) ? inp : res_str;
+}
+
+static char **make_list_in(char **inp, char *name)
+{
+       int len, i;
+       int name_len = strlen(name);
+       int n = 0;
+       char **list;
+       char *p1, *p2, *p3;
+
+       /* create list of variable values */
+       list = xmalloc(sizeof(*list));
+       for (i = 0; inp[i]; i++) {
+               p3 = insert_var_value(inp[i]);
+               p1 = p3;
+               while (*p1) {
+                       if ((*p1 == ' ')) {
+                               p1++;
+                               continue;
+                       }
+                       if ((p2 = strchr(p1, ' '))) {
+                               len = p2 - p1;
+                       } else {
+                               len = strlen(p1);
+                               p2 = p1 + len;
+                       }
+                       /* we use n + 2 in realloc for list,because we add
+                        * new element and then we will add NULL element */
+                       list = xrealloc(list, sizeof(*list) * (n + 2));
+                       list[n] = xmalloc(2 + name_len + len);
+                       strcpy(list[n], name);
+                       strcat(list[n], "=");
+                       strncat(list[n], p1, len);
+                       list[n++][name_len + len + 1] = '\0';
+                       p1 = p2;
+               }
+               if (p3 != inp[i]) free(p3);
+       }
+       list[n] = NULL;
+       return list;
+}
+
+/*
+ * Make new string for parser
+ * inp     - array of argument strings to flatten
+ * nonnull - indicates argument was quoted when originally parsed
+ */
+static char *make_string(char **inp, int *nonnull)
+{
+       char *p;
+       char *str = NULL;
+       int n;
+       int len = 2;
+       char *noeval_str;
+       int noeval = 0;
+
+       noeval_str = get_local_var("HUSH_NO_EVAL");
+       if (noeval_str != NULL && *noeval_str != '0' && *noeval_str != '\0')
+               noeval = 1;
+       for (n = 0; inp[n]; n++) {
+               p = insert_var_value_sub(inp[n], noeval);
+               str = xrealloc(str, (len + strlen(p) + (2 * nonnull[n])));
+               if (n) {
+                       strcat(str, " ");
+               } else {
+                       *str = '\0';
+               }
+               if (nonnull[n])
+                       strcat(str, "'");
+               strcat(str, p);
+               if (nonnull[n])
+                       strcat(str, "'");
+               len = strlen(str) + 3;
+               if (p != inp[n]) free(p);
+       }
+       len = strlen(str);
+       *(str + len) = '\n';
+       *(str + len + 1) = '\0';
+       return str;
+}
+
+#ifdef __U_BOOT__
+static int do_showvar(cmd_tbl_t *cmdtp, int flag, int argc,
+                     char * const argv[])
+{
+       int i, k;
+       int rcode = 0;
+       struct variables *cur;
+
+       if (argc == 1) {                /* Print all env variables      */
+               for (cur = top_vars; cur; cur = cur->next) {
+                       printf ("%s=%s\n", cur->name, cur->value);
+                       if (ctrlc ()) {
+                               puts ("\n ** Abort\n");
+                               return 1;
+                       }
+               }
+               return 0;
+       }
+       for (i = 1; i < argc; ++i) {    /* print single env variables   */
+               char *name = argv[i];
+
+               k = -1;
+               for (cur = top_vars; cur; cur = cur->next) {
+                       if(strcmp (cur->name, name) == 0) {
+                               k = 0;
+                               printf ("%s=%s\n", cur->name, cur->value);
+                       }
+                       if (ctrlc ()) {
+                               puts ("\n ** Abort\n");
+                               return 1;
+                       }
+               }
+               if (k < 0) {
+                       printf ("## Error: \"%s\" not defined\n", name);
+                       rcode ++;
+               }
+       }
+       return rcode;
+}
+
+U_BOOT_CMD(
+       showvar, CONFIG_SYS_MAXARGS, 1, do_showvar,
+       "print local hushshell variables",
+       "\n    - print values of all hushshell variables\n"
+       "showvar name ...\n"
+       "    - print value of hushshell variable 'name'"
+);
+
+#endif
+/****************************************************************************/
diff --git a/common/hush.c b/common/hush.c
deleted file mode 100644 (file)
index 5b43224..0000000
+++ /dev/null
@@ -1,3687 +0,0 @@
-/*
- * sh.c -- a prototype Bourne shell grammar parser
- *      Intended to follow the original Thompson and Ritchie
- *      "small and simple is beautiful" philosophy, which
- *      incidentally is a good match to today's BusyBox.
- *
- * Copyright (C) 2000,2001  Larry Doolittle  <larry@doolittle.boa.org>
- *
- * Credits:
- *      The parser routines proper are all original material, first
- *      written Dec 2000 and Jan 2001 by Larry Doolittle.
- *      The execution engine, the builtins, and much of the underlying
- *      support has been adapted from busybox-0.49pre's lash,
- *      which is Copyright (C) 2000 by Lineo, Inc., and
- *      written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
- *      That, in turn, is based in part on ladsh.c, by Michael K. Johnson and
- *      Erik W. Troan, which they placed in the public domain.  I don't know
- *      how much of the Johnson/Troan code has survived the repeated rewrites.
- * Other credits:
- *      b_addchr() derived from similar w_addchar function in glibc-2.2
- *      setup_redirect(), redirect_opt_num(), and big chunks of main()
- *        and many builtins derived from contributions by Erik Andersen
- *      miscellaneous bugfixes from Matt Kraai
- *
- * There are two big (and related) architecture differences between
- * this parser and the lash parser.  One is that this version is
- * actually designed from the ground up to understand nearly all
- * of the Bourne grammar.  The second, consequential change is that
- * the parser and input reader have been turned inside out.  Now,
- * the parser is in control, and asks for input as needed.  The old
- * way had the input reader in control, and it asked for parsing to
- * take place as needed.  The new way makes it much easier to properly
- * handle the recursion implicit in the various substitutions, especially
- * across continuation lines.
- *
- * Bash grammar not implemented: (how many of these were in original sh?)
- *      $@ (those sure look like weird quoting rules)
- *      $_
- *      ! negation operator for pipes
- *      &> and >& redirection of stdout+stderr
- *      Brace Expansion
- *      Tilde Expansion
- *      fancy forms of Parameter Expansion
- *      aliases
- *      Arithmetic Expansion
- *      <(list) and >(list) Process Substitution
- *      reserved words: case, esac, select, function
- *      Here Documents ( << word )
- *      Functions
- * Major bugs:
- *      job handling woefully incomplete and buggy
- *      reserved word execution woefully incomplete and buggy
- * to-do:
- *      port selected bugfixes from post-0.49 busybox lash - done?
- *      finish implementing reserved words: for, while, until, do, done
- *      change { and } from special chars to reserved words
- *      builtins: break, continue, eval, return, set, trap, ulimit
- *      test magic exec
- *      handle children going into background
- *      clean up recognition of null pipes
- *      check setting of global_argc and global_argv
- *      control-C handling, probably with longjmp
- *      follow IFS rules more precisely, including update semantics
- *      figure out what to do with backslash-newline
- *      explain why we use signal instead of sigaction
- *      propagate syntax errors, die on resource errors?
- *      continuation lines, both explicit and implicit - done?
- *      memory leak finding and plugging - done?
- *      more testing, especially quoting rules and redirection
- *      document how quoting rules not precisely followed for variable assignments
- *      maybe change map[] to use 2-bit entries
- *      (eventually) remove all the printf's
- *
- * SPDX-License-Identifier:    GPL-2.0+
- */
-
-#define __U_BOOT__
-#ifdef __U_BOOT__
-#include <malloc.h>         /* malloc, free, realloc*/
-#include <linux/ctype.h>    /* isalpha, isdigit */
-#include <common.h>        /* readline */
-#include <hush.h>
-#include <command.h>        /* find_cmd */
-#ifndef CONFIG_SYS_PROMPT_HUSH_PS2
-#define CONFIG_SYS_PROMPT_HUSH_PS2     "> "
-#endif
-#endif
-#ifndef __U_BOOT__
-#include <ctype.h>     /* isalpha, isdigit */
-#include <unistd.h>    /* getpid */
-#include <stdlib.h>    /* getenv, atoi */
-#include <string.h>    /* strchr */
-#include <stdio.h>     /* popen etc. */
-#include <glob.h>      /* glob, of course */
-#include <stdarg.h>    /* va_list */
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>    /* should be pretty obvious */
-
-#include <sys/stat.h>  /* ulimit */
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <signal.h>
-
-/* #include <dmalloc.h> */
-
-#if 1
-#include "busybox.h"
-#include "cmdedit.h"
-#else
-#define applet_name "hush"
-#include "standalone.h"
-#define hush_main main
-#undef CONFIG_FEATURE_SH_FANCY_PROMPT
-#define BB_BANNER
-#endif
-#endif
-#define SPECIAL_VAR_SYMBOL 03
-#define SUBSTED_VAR_SYMBOL 04
-#ifndef __U_BOOT__
-#define FLAG_EXIT_FROM_LOOP 1
-#define FLAG_PARSE_SEMICOLON (1 << 1)          /* symbol ';' is special for parser */
-#define FLAG_REPARSING       (1 << 2)          /* >= 2nd pass */
-
-#endif
-
-#ifdef __U_BOOT__
-DECLARE_GLOBAL_DATA_PTR;
-
-#define EXIT_SUCCESS 0
-#define EOF -1
-#define syntax() syntax_err()
-#define xstrdup strdup
-#define error_msg printf
-#else
-typedef enum {
-       REDIRECT_INPUT     = 1,
-       REDIRECT_OVERWRITE = 2,
-       REDIRECT_APPEND    = 3,
-       REDIRECT_HEREIS    = 4,
-       REDIRECT_IO        = 5
-} redir_type;
-
-/* The descrip member of this structure is only used to make debugging
- * output pretty */
-struct {int mode; int default_fd; char *descrip;} redir_table[] = {
-       { 0,                         0, "()" },
-       { O_RDONLY,                  0, "<"  },
-       { O_CREAT|O_TRUNC|O_WRONLY,  1, ">"  },
-       { O_CREAT|O_APPEND|O_WRONLY, 1, ">>" },
-       { O_RDONLY,                 -1, "<<" },
-       { O_RDWR,                    1, "<>" }
-};
-#endif
-
-typedef enum {
-       PIPE_SEQ = 1,
-       PIPE_AND = 2,
-       PIPE_OR  = 3,
-       PIPE_BG  = 4,
-} pipe_style;
-
-/* might eventually control execution */
-typedef enum {
-       RES_NONE  = 0,
-       RES_IF    = 1,
-       RES_THEN  = 2,
-       RES_ELIF  = 3,
-       RES_ELSE  = 4,
-       RES_FI    = 5,
-       RES_FOR   = 6,
-       RES_WHILE = 7,
-       RES_UNTIL = 8,
-       RES_DO    = 9,
-       RES_DONE  = 10,
-       RES_XXXX  = 11,
-       RES_IN    = 12,
-       RES_SNTX  = 13
-} reserved_style;
-#define FLAG_END   (1<<RES_NONE)
-#define FLAG_IF    (1<<RES_IF)
-#define FLAG_THEN  (1<<RES_THEN)
-#define FLAG_ELIF  (1<<RES_ELIF)
-#define FLAG_ELSE  (1<<RES_ELSE)
-#define FLAG_FI    (1<<RES_FI)
-#define FLAG_FOR   (1<<RES_FOR)
-#define FLAG_WHILE (1<<RES_WHILE)
-#define FLAG_UNTIL (1<<RES_UNTIL)
-#define FLAG_DO    (1<<RES_DO)
-#define FLAG_DONE  (1<<RES_DONE)
-#define FLAG_IN    (1<<RES_IN)
-#define FLAG_START (1<<RES_XXXX)
-
-/* This holds pointers to the various results of parsing */
-struct p_context {
-       struct child_prog *child;
-       struct pipe *list_head;
-       struct pipe *pipe;
-#ifndef __U_BOOT__
-       struct redir_struct *pending_redirect;
-#endif
-       reserved_style w;
-       int old_flag;                           /* for figuring out valid reserved words */
-       struct p_context *stack;
-       int type;                       /* define type of parser : ";$" common or special symbol */
-       /* How about quoting status? */
-};
-
-#ifndef __U_BOOT__
-struct redir_struct {
-       redir_type type;                        /* type of redirection */
-       int fd;                                         /* file descriptor being redirected */
-       int dup;                                        /* -1, or file descriptor being duplicated */
-       struct redir_struct *next;      /* pointer to the next redirect in the list */
-       glob_t word;                            /* *word.gl_pathv is the filename */
-};
-#endif
-
-struct child_prog {
-#ifndef __U_BOOT__
-       pid_t pid;                                      /* 0 if exited */
-#endif
-       char **argv;                            /* program name and arguments */
-       /* was quoted when parsed; copy of struct o_string.nonnull field */
-       int *argv_nonnull;                      
-#ifdef __U_BOOT__
-       int    argc;                            /* number of program arguments */
-#endif
-       struct pipe *group;                     /* if non-NULL, first in group or subshell */
-#ifndef __U_BOOT__
-       int subshell;                           /* flag, non-zero if group must be forked */
-       struct redir_struct *redirects; /* I/O redirections */
-       glob_t glob_result;                     /* result of parameter globbing */
-       int is_stopped;                         /* is the program currently running? */
-       struct pipe *family;            /* pointer back to the child's parent pipe */
-#endif
-       int sp;                         /* number of SPECIAL_VAR_SYMBOL */
-       int type;
-};
-
-struct pipe {
-#ifndef __U_BOOT__
-       int jobid;                                      /* job number */
-#endif
-       int num_progs;                          /* total number of programs in job */
-#ifndef __U_BOOT__
-       int running_progs;                      /* number of programs running */
-       char *text;                                     /* name of job */
-       char *cmdbuf;                           /* buffer various argv's point into */
-       pid_t pgrp;                                     /* process group ID for the job */
-#endif
-       struct child_prog *progs;       /* array of commands in pipe */
-       struct pipe *next;                      /* to track background commands */
-#ifndef __U_BOOT__
-       int stopped_progs;                      /* number of programs alive, but stopped */
-       int job_context;                        /* bitmask defining current context */
-#endif
-       pipe_style followup;            /* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */
-       reserved_style r_mode;          /* supports if, for, while, until */
-};
-
-#ifndef __U_BOOT__
-struct close_me {
-       int fd;
-       struct close_me *next;
-};
-#endif
-
-struct variables {
-       char *name;
-       char *value;
-       int flg_export;
-       int flg_read_only;
-       struct variables *next;
-};
-
-/* globals, connect us to the outside world
- * the first three support $?, $#, and $1 */
-#ifndef __U_BOOT__
-char **global_argv;
-unsigned int global_argc;
-#endif
-static unsigned int last_return_code;
-#ifndef __U_BOOT__
-extern char **environ; /* This is in <unistd.h>, but protected with __USE_GNU */
-#endif
-
-/* "globals" within this file */
-static uchar *ifs;
-static char map[256];
-#ifndef __U_BOOT__
-static int fake_mode;
-static int interactive;
-static struct close_me *close_me_head;
-static const char *cwd;
-static struct pipe *job_list;
-static unsigned int last_bg_pid;
-static unsigned int last_jobid;
-static unsigned int shell_terminal;
-static char *PS1;
-static char *PS2;
-struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
-struct variables *top_vars = &shell_ver;
-#else
-static int flag_repeat = 0;
-static int do_repeat = 0;
-static struct variables *top_vars = NULL ;
-#endif /*__U_BOOT__ */
-
-#define B_CHUNK (100)
-#define B_NOSPAC 1
-
-typedef struct {
-       char *data;
-       int length;
-       int maxlen;
-       int quote;
-       int nonnull;
-} o_string;
-#define NULL_O_STRING {NULL,0,0,0,0}
-/* used for initialization:
-       o_string foo = NULL_O_STRING; */
-
-/* I can almost use ordinary FILE *.  Is open_memstream() universally
- * available?  Where is it documented? */
-struct in_str {
-       const char *p;
-#ifndef __U_BOOT__
-       char peek_buf[2];
-#endif
-       int __promptme;
-       int promptmode;
-#ifndef __U_BOOT__
-       FILE *file;
-#endif
-       int (*get) (struct in_str *);
-       int (*peek) (struct in_str *);
-};
-#define b_getch(input) ((input)->get(input))
-#define b_peek(input) ((input)->peek(input))
-
-#ifndef __U_BOOT__
-#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
-
-struct built_in_command {
-       char *cmd;                                      /* name */
-       char *descr;                            /* description */
-       int (*function) (struct child_prog *);  /* function ptr */
-};
-#endif
-
-/* define DEBUG_SHELL for debugging output (obviously ;-)) */
-#if 0
-#define DEBUG_SHELL
-#endif
-
-/* This should be in utility.c */
-#ifdef DEBUG_SHELL
-#ifndef __U_BOOT__
-static void debug_printf(const char *format, ...)
-{
-       va_list args;
-       va_start(args, format);
-       vfprintf(stderr, format, args);
-       va_end(args);
-}
-#else
-#define debug_printf(fmt,args...)      printf (fmt ,##args)
-#endif
-#else
-static inline void debug_printf(const char *format, ...) { }
-#endif
-#define final_printf debug_printf
-
-#ifdef __U_BOOT__
-static void syntax_err(void) {
-        printf("syntax error\n");
-}
-#else
-static void __syntax(char *file, int line) {
-       error_msg("syntax error %s:%d", file, line);
-}
-#define syntax() __syntax(__FILE__, __LINE__)
-#endif
-
-#ifdef __U_BOOT__
-static void *xmalloc(size_t size);
-static void *xrealloc(void *ptr, size_t size);
-#else
-/* Index of subroutines: */
-/*   function prototypes for builtins */
-static int builtin_cd(struct child_prog *child);
-static int builtin_env(struct child_prog *child);
-static int builtin_eval(struct child_prog *child);
-static int builtin_exec(struct child_prog *child);
-static int builtin_exit(struct child_prog *child);
-static int builtin_export(struct child_prog *child);
-static int builtin_fg_bg(struct child_prog *child);
-static int builtin_help(struct child_prog *child);
-static int builtin_jobs(struct child_prog *child);
-static int builtin_pwd(struct child_prog *child);
-static int builtin_read(struct child_prog *child);
-static int builtin_set(struct child_prog *child);
-static int builtin_shift(struct child_prog *child);
-static int builtin_source(struct child_prog *child);
-static int builtin_umask(struct child_prog *child);
-static int builtin_unset(struct child_prog *child);
-static int builtin_not_written(struct child_prog *child);
-#endif
-/*   o_string manipulation: */
-static int b_check_space(o_string *o, int len);
-static int b_addchr(o_string *o, int ch);
-static void b_reset(o_string *o);
-static int b_addqchr(o_string *o, int ch, int quote);
-#ifndef __U_BOOT__
-static int b_adduint(o_string *o, unsigned int i);
-#endif
-/*  in_str manipulations: */
-static int static_get(struct in_str *i);
-static int static_peek(struct in_str *i);
-static int file_get(struct in_str *i);
-static int file_peek(struct in_str *i);
-#ifndef __U_BOOT__
-static void setup_file_in_str(struct in_str *i, FILE *f);
-#else
-static void setup_file_in_str(struct in_str *i);
-#endif
-static void setup_string_in_str(struct in_str *i, const char *s);
-#ifndef __U_BOOT__
-/*  close_me manipulations: */
-static void mark_open(int fd);
-static void mark_closed(int fd);
-static void close_all(void);
-#endif
-/*  "run" the final data structures: */
-static char *indenter(int i);
-static int free_pipe_list(struct pipe *head, int indent);
-static int free_pipe(struct pipe *pi, int indent);
-/*  really run the final data structures: */
-#ifndef __U_BOOT__
-static int setup_redirects(struct child_prog *prog, int squirrel[]);
-#endif
-static int run_list_real(struct pipe *pi);
-#ifndef __U_BOOT__
-static void pseudo_exec(struct child_prog *child) __attribute__ ((noreturn));
-#endif
-static int run_pipe_real(struct pipe *pi);
-/*   extended glob support: */
-#ifndef __U_BOOT__
-static int globhack(const char *src, int flags, glob_t *pglob);
-static int glob_needed(const char *s);
-static int xglob(o_string *dest, int flags, glob_t *pglob);
-#endif
-/*   variable assignment: */
-static int is_assignment(const char *s);
-/*   data structure manipulation: */
-#ifndef __U_BOOT__
-static int setup_redirect(struct p_context *ctx, int fd, redir_type style, struct in_str *input);
-#endif
-static void initialize_context(struct p_context *ctx);
-static int done_word(o_string *dest, struct p_context *ctx);
-static int done_command(struct p_context *ctx);
-static int done_pipe(struct p_context *ctx, pipe_style type);
-/*   primary string parsing: */
-#ifndef __U_BOOT__
-static int redirect_dup_num(struct in_str *input);
-static int redirect_opt_num(o_string *o);
-static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end);
-static int parse_group(o_string *dest, struct p_context *ctx, struct in_str *input, int ch);
-#endif
-static char *lookup_param(char *src);
-static char *make_string(char **inp, int *nonnull);
-static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input);
-#ifndef __U_BOOT__
-static int parse_string(o_string *dest, struct p_context *ctx, const char *src);
-#endif
-static int parse_stream(o_string *dest, struct p_context *ctx, struct in_str *input0, int end_trigger);
-/*   setup: */
-static int parse_stream_outer(struct in_str *inp, int flag);
-#ifndef __U_BOOT__
-static int parse_string_outer(const char *s, int flag);
-static int parse_file_outer(FILE *f);
-#endif
-#ifndef __U_BOOT__
-/*   job management: */
-static int checkjobs(struct pipe* fg_pipe);
-static void insert_bg_job(struct pipe *pi);
-static void remove_bg_job(struct pipe *pi);
-#endif
-/*     local variable support */
-static char **make_list_in(char **inp, char *name);
-static char *insert_var_value(char *inp);
-static char *insert_var_value_sub(char *inp, int tag_subst);
-
-#ifndef __U_BOOT__
-/* Table of built-in functions.  They can be forked or not, depending on
- * context: within pipes, they fork.  As simple commands, they do not.
- * When used in non-forking context, they can change global variables
- * in the parent shell process.  If forked, of course they can not.
- * For example, 'unset foo | whatever' will parse and run, but foo will
- * still be set at the end. */
-static struct built_in_command bltins[] = {
-       {"bg", "Resume a job in the background", builtin_fg_bg},
-       {"break", "Exit for, while or until loop", builtin_not_written},
-       {"cd", "Change working directory", builtin_cd},
-       {"continue", "Continue for, while or until loop", builtin_not_written},
-       {"env", "Print all environment variables", builtin_env},
-       {"eval", "Construct and run shell command", builtin_eval},
-       {"exec", "Exec command, replacing this shell with the exec'd process",
-               builtin_exec},
-       {"exit", "Exit from shell()", builtin_exit},
-       {"export", "Set environment variable", builtin_export},
-       {"fg", "Bring job into the foreground", builtin_fg_bg},
-       {"jobs", "Lists the active jobs", builtin_jobs},
-       {"pwd", "Print current directory", builtin_pwd},
-       {"read", "Input environment variable", builtin_read},
-       {"return", "Return from a function", builtin_not_written},
-       {"set", "Set/unset shell local variables", builtin_set},
-       {"shift", "Shift positional parameters", builtin_shift},
-       {"trap", "Trap signals", builtin_not_written},
-       {"ulimit","Controls resource limits", builtin_not_written},
-       {"umask","Sets file creation mask", builtin_umask},
-       {"unset", "Unset environment variable", builtin_unset},
-       {".", "Source-in and run commands in a file", builtin_source},
-       {"help", "List shell built-in commands", builtin_help},
-       {NULL, NULL, NULL}
-};
-
-static const char *set_cwd(void)
-{
-       if(cwd==unknown)
-               cwd = NULL;     /* xgetcwd(arg) called free(arg) */
-       cwd = xgetcwd((char *)cwd);
-       if (!cwd)
-               cwd = unknown;
-       return cwd;
-}
-
-/* built-in 'eval' handler */
-static int builtin_eval(struct child_prog *child)
-{
-       char *str = NULL;
-       int rcode = EXIT_SUCCESS;
-
-       if (child->argv[1]) {
-               str = make_string(child->argv + 1);
-               parse_string_outer(str, FLAG_EXIT_FROM_LOOP |
-                                       FLAG_PARSE_SEMICOLON);
-               free(str);
-               rcode = last_return_code;
-       }
-       return rcode;
-}
-
-/* built-in 'cd <path>' handler */
-static int builtin_cd(struct child_prog *child)
-{
-       char *newdir;
-       if (child->argv[1] == NULL)
-               newdir = getenv("HOME");
-       else
-               newdir = child->argv[1];
-       if (chdir(newdir)) {
-               printf("cd: %s: %s\n", newdir, strerror(errno));
-               return EXIT_FAILURE;
-       }
-       set_cwd();
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'env' handler */
-static int builtin_env(struct child_prog *dummy)
-{
-       char **e = environ;
-       if (e == NULL) return EXIT_FAILURE;
-       for (; *e; e++) {
-               puts(*e);
-       }
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'exec' handler */
-static int builtin_exec(struct child_prog *child)
-{
-       if (child->argv[1] == NULL)
-               return EXIT_SUCCESS;   /* Really? */
-       child->argv++;
-       pseudo_exec(child);
-       /* never returns */
-}
-
-/* built-in 'exit' handler */
-static int builtin_exit(struct child_prog *child)
-{
-       if (child->argv[1] == NULL)
-               exit(last_return_code);
-       exit (atoi(child->argv[1]));
-}
-
-/* built-in 'export VAR=value' handler */
-static int builtin_export(struct child_prog *child)
-{
-       int res = 0;
-       char *name = child->argv[1];
-
-       if (name == NULL) {
-               return (builtin_env(child));
-       }
-
-       name = strdup(name);
-
-       if(name) {
-               char *value = strchr(name, '=');
-
-               if (!value) {
-                       char *tmp;
-                       /* They are exporting something without an =VALUE */
-
-                       value = get_local_var(name);
-                       if (value) {
-                               size_t ln = strlen(name);
-
-                               tmp = realloc(name, ln+strlen(value)+2);
-                               if(tmp==NULL)
-                                       res = -1;
-                               else {
-                                       sprintf(tmp+ln, "=%s", value);
-                                       name = tmp;
-                               }
-                       } else {
-                               /* bash does not return an error when trying to export
-                                * an undefined variable.  Do likewise. */
-                               res = 1;
-                       }
-               }
-       }
-       if (res<0)
-               perror_msg("export");
-       else if(res==0)
-               res = set_local_var(name, 1);
-       else
-               res = 0;
-       free(name);
-       return res;
-}
-
-/* built-in 'fg' and 'bg' handler */
-static int builtin_fg_bg(struct child_prog *child)
-{
-       int i, jobnum;
-       struct pipe *pi=NULL;
-
-       if (!interactive)
-               return EXIT_FAILURE;
-       /* If they gave us no args, assume they want the last backgrounded task */
-       if (!child->argv[1]) {
-               for (pi = job_list; pi; pi = pi->next) {
-                       if (pi->jobid == last_jobid) {
-                               break;
-                       }
-               }
-               if (!pi) {
-                       error_msg("%s: no current job", child->argv[0]);
-                       return EXIT_FAILURE;
-               }
-       } else {
-               if (sscanf(child->argv[1], "%%%d", &jobnum) != 1) {
-                       error_msg("%s: bad argument '%s'", child->argv[0], child->argv[1]);
-                       return EXIT_FAILURE;
-               }
-               for (pi = job_list; pi; pi = pi->next) {
-                       if (pi->jobid == jobnum) {
-                               break;
-                       }
-               }
-               if (!pi) {
-                       error_msg("%s: %d: no such job", child->argv[0], jobnum);
-                       return EXIT_FAILURE;
-               }
-       }
-
-       if (*child->argv[0] == 'f') {
-               /* Put the job into the foreground.  */
-               tcsetpgrp(shell_terminal, pi->pgrp);
-       }
-
-       /* Restart the processes in the job */
-       for (i = 0; i < pi->num_progs; i++)
-               pi->progs[i].is_stopped = 0;
-
-       if ( (i=kill(- pi->pgrp, SIGCONT)) < 0) {
-               if (i == ESRCH) {
-                       remove_bg_job(pi);
-               } else {
-                       perror_msg("kill (SIGCONT)");
-               }
-       }
-
-       pi->stopped_progs = 0;
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'help' handler */
-static int builtin_help(struct child_prog *dummy)
-{
-       struct built_in_command *x;
-
-       printf("\nBuilt-in commands:\n");
-       printf("-------------------\n");
-       for (x = bltins; x->cmd; x++) {
-               if (x->descr==NULL)
-                       continue;
-               printf("%s\t%s\n", x->cmd, x->descr);
-       }
-       printf("\n\n");
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'jobs' handler */
-static int builtin_jobs(struct child_prog *child)
-{
-       struct pipe *job;
-       char *status_string;
-
-       for (job = job_list; job; job = job->next) {
-               if (job->running_progs == job->stopped_progs)
-                       status_string = "Stopped";
-               else
-                       status_string = "Running";
-
-               printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text);
-       }
-       return EXIT_SUCCESS;
-}
-
-
-/* built-in 'pwd' handler */
-static int builtin_pwd(struct child_prog *dummy)
-{
-       puts(set_cwd());
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'read VAR' handler */
-static int builtin_read(struct child_prog *child)
-{
-       int res;
-
-       if (child->argv[1]) {
-               char string[BUFSIZ];
-               char *var = 0;
-
-               string[0] = 0;  /* In case stdin has only EOF */
-               /* read string */
-               fgets(string, sizeof(string), stdin);
-               chomp(string);
-               var = malloc(strlen(child->argv[1])+strlen(string)+2);
-               if(var) {
-                       sprintf(var, "%s=%s", child->argv[1], string);
-                       res = set_local_var(var, 0);
-               } else
-                       res = -1;
-               if (res)
-                       fprintf(stderr, "read: %m\n");
-               free(var);      /* So not move up to avoid breaking errno */
-               return res;
-       } else {
-               do res=getchar(); while(res!='\n' && res!=EOF);
-               return 0;
-       }
-}
-
-/* built-in 'set VAR=value' handler */
-static int builtin_set(struct child_prog *child)
-{
-       char *temp = child->argv[1];
-       struct variables *e;
-
-       if (temp == NULL)
-               for(e = top_vars; e; e=e->next)
-                       printf("%s=%s\n", e->name, e->value);
-       else
-               set_local_var(temp, 0);
-
-               return EXIT_SUCCESS;
-}
-
-
-/* Built-in 'shift' handler */
-static int builtin_shift(struct child_prog *child)
-{
-       int n=1;
-       if (child->argv[1]) {
-               n=atoi(child->argv[1]);
-       }
-       if (n>=0 && n<global_argc) {
-               /* XXX This probably breaks $0 */
-               global_argc -= n;
-               global_argv += n;
-               return EXIT_SUCCESS;
-       } else {
-               return EXIT_FAILURE;
-       }
-}
-
-/* Built-in '.' handler (read-in and execute commands from file) */
-static int builtin_source(struct child_prog *child)
-{
-       FILE *input;
-       int status;
-
-       if (child->argv[1] == NULL)
-               return EXIT_FAILURE;
-
-       /* XXX search through $PATH is missing */
-       input = fopen(child->argv[1], "r");
-       if (!input) {
-               error_msg("Couldn't open file '%s'", child->argv[1]);
-               return EXIT_FAILURE;
-       }
-
-       /* Now run the file */
-       /* XXX argv and argc are broken; need to save old global_argv
-        * (pointer only is OK!) on this stack frame,
-        * set global_argv=child->argv+1, recurse, and restore. */
-       mark_open(fileno(input));
-       status = parse_file_outer(input);
-       mark_closed(fileno(input));
-       fclose(input);
-       return (status);
-}
-
-static int builtin_umask(struct child_prog *child)
-{
-       mode_t new_umask;
-       const char *arg = child->argv[1];
-       char *end;
-       if (arg) {
-               new_umask=strtoul(arg, &end, 8);
-               if (*end!='\0' || end == arg) {
-                       return EXIT_FAILURE;
-               }
-       } else {
-               printf("%.3o\n", (unsigned int) (new_umask=umask(0)));
-       }
-       umask(new_umask);
-       return EXIT_SUCCESS;
-}
-
-/* built-in 'unset VAR' handler */
-static int builtin_unset(struct child_prog *child)
-{
-       /* bash returned already true */
-       unset_local_var(child->argv[1]);
-       return EXIT_SUCCESS;
-}
-
-static int builtin_not_written(struct child_prog *child)
-{
-       printf("builtin_%s not written\n",child->argv[0]);
-       return EXIT_FAILURE;
-}
-#endif
-
-static int b_check_space(o_string *o, int len)
-{
-       /* It would be easy to drop a more restrictive policy
-        * in here, such as setting a maximum string length */
-       if (o->length + len > o->maxlen) {
-               char *old_data = o->data;
-               /* assert (data == NULL || o->maxlen != 0); */
-               o->maxlen += max(2*len, B_CHUNK);
-               o->data = realloc(o->data, 1 + o->maxlen);
-               if (o->data == NULL) {
-                       free(old_data);
-               }
-       }
-       return o->data == NULL;
-}
-
-static int b_addchr(o_string *o, int ch)
-{
-       debug_printf("b_addchr: %c %d %p\n", ch, o->length, o);
-       if (b_check_space(o, 1)) return B_NOSPAC;
-       o->data[o->length] = ch;
-       o->length++;
-       o->data[o->length] = '\0';
-       return 0;
-}
-
-static void b_reset(o_string *o)
-{
-       o->length = 0;
-       o->nonnull = 0;
-       if (o->data != NULL) *o->data = '\0';
-}
-
-static void b_free(o_string *o)
-{
-       b_reset(o);
-       free(o->data);
-       o->data = NULL;
-       o->maxlen = 0;
-}
-
-/* My analysis of quoting semantics tells me that state information
- * is associated with a destination, not a source.
- */
-static int b_addqchr(o_string *o, int ch, int quote)
-{
-       if (quote && strchr("*?[\\",ch)) {
-               int rc;
-               rc = b_addchr(o, '\\');
-               if (rc) return rc;
-       }
-       return b_addchr(o, ch);
-}
-
-#ifndef __U_BOOT__
-static int b_adduint(o_string *o, unsigned int i)
-{
-       int r;
-       char *p = simple_itoa(i);
-       /* no escape checking necessary */
-       do r=b_addchr(o, *p++); while (r==0 && *p);
-       return r;
-}
-#endif
-
-static int static_get(struct in_str *i)
-{
-       int ch = *i->p++;
-       if (ch=='\0') return EOF;
-       return ch;
-}
-
-static int static_peek(struct in_str *i)
-{
-       return *i->p;
-}
-
-#ifndef __U_BOOT__
-static inline void cmdedit_set_initial_prompt(void)
-{
-#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
-       PS1 = NULL;
-#else
-       PS1 = getenv("PS1");
-       if(PS1==0)
-               PS1 = "\\w \\$ ";
-#endif
-}
-
-static inline void setup_prompt_string(int promptmode, char **prompt_str)
-{
-       debug_printf("setup_prompt_string %d ",promptmode);
-#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
-       /* Set up the prompt */
-       if (promptmode == 1) {
-               free(PS1);
-               PS1=xmalloc(strlen(cwd)+4);
-               sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ?  "$ ":"# ");
-               *prompt_str = PS1;
-       } else {
-               *prompt_str = PS2;
-       }
-#else
-       *prompt_str = (promptmode==1)? PS1 : PS2;
-#endif
-       debug_printf("result %s\n",*prompt_str);
-}
-#endif
-
-static void get_user_input(struct in_str *i)
-{
-#ifndef __U_BOOT__
-       char *prompt_str;
-       static char the_command[BUFSIZ];
-
-       setup_prompt_string(i->promptmode, &prompt_str);
-#ifdef CONFIG_FEATURE_COMMAND_EDITING
-       /*
-        ** enable command line editing only while a command line
-        ** is actually being read; otherwise, we'll end up bequeathing
-        ** atexit() handlers and other unwanted stuff to our
-        ** child processes (rob@sysgo.de)
-        */
-       cmdedit_read_input(prompt_str, the_command);
-#else
-       fputs(prompt_str, stdout);
-       fflush(stdout);
-       the_command[0]=fgetc(i->file);
-       the_command[1]='\0';
-#endif
-       fflush(stdout);
-       i->p = the_command;
-#else
-       int n;
-       static char the_command[CONFIG_SYS_CBSIZE + 1];
-
-#ifdef CONFIG_BOOT_RETRY_TIME
-#  ifndef CONFIG_RESET_TO_RETRY
-#      error "This currently only works with CONFIG_RESET_TO_RETRY enabled"
-#  endif
-       reset_cmd_timeout();
-#endif
-       i->__promptme = 1;
-       if (i->promptmode == 1) {
-               n = readline(CONFIG_SYS_PROMPT);
-       } else {
-               n = readline(CONFIG_SYS_PROMPT_HUSH_PS2);
-       }
-#ifdef CONFIG_BOOT_RETRY_TIME
-       if (n == -2) {
-         puts("\nTimeout waiting for command\n");
-#  ifdef CONFIG_RESET_TO_RETRY
-         do_reset(NULL, 0, 0, NULL);
-#  else
-#      error "This currently only works with CONFIG_RESET_TO_RETRY enabled"
-#  endif
-       }
-#endif
-       if (n == -1 ) {
-               flag_repeat = 0;
-               i->__promptme = 0;
-       }
-       n = strlen(console_buffer);
-       console_buffer[n] = '\n';
-       console_buffer[n+1]= '\0';
-       if (had_ctrlc()) flag_repeat = 0;
-       clear_ctrlc();
-       do_repeat = 0;
-       if (i->promptmode == 1) {
-               if (console_buffer[0] == '\n'&& flag_repeat == 0) {
-                       strcpy(the_command,console_buffer);
-               }
-               else {
-                       if (console_buffer[0] != '\n') {
-                               strcpy(the_command,console_buffer);
-                               flag_repeat = 1;
-                       }
-                       else {
-                               do_repeat = 1;
-                       }
-               }
-               i->p = the_command;
-       }
-       else {
-               if (console_buffer[0] != '\n') {
-                       if (strlen(the_command) + strlen(console_buffer)
-                           < CONFIG_SYS_CBSIZE) {
-                               n = strlen(the_command);
-                               the_command[n-1] = ' ';
-                               strcpy(&the_command[n],console_buffer);
-                       }
-                       else {
-                               the_command[0] = '\n';
-                               the_command[1] = '\0';
-                               flag_repeat = 0;
-                       }
-               }
-               if (i->__promptme == 0) {
-                       the_command[0] = '\n';
-                       the_command[1] = '\0';
-               }
-               i->p = console_buffer;
-       }
-#endif
-}
-
-/* This is the magic location that prints prompts
- * and gets data back from the user */
-static int file_get(struct in_str *i)
-{
-       int ch;
-
-       ch = 0;
-       /* If there is data waiting, eat it up */
-       if (i->p && *i->p) {
-               ch = *i->p++;
-       } else {
-               /* need to double check i->file because we might be doing something
-                * more complicated by now, like sourcing or substituting. */
-#ifndef __U_BOOT__
-               if (i->__promptme && interactive && i->file == stdin) {
-                       while(! i->p || (interactive && strlen(i->p)==0) ) {
-#else
-                       while(! i->p  || strlen(i->p)==0 ) {
-#endif
-                               get_user_input(i);
-                       }
-                       i->promptmode=2;
-#ifndef __U_BOOT__
-                       i->__promptme = 0;
-#endif
-                       if (i->p && *i->p) {
-                               ch = *i->p++;
-                       }
-#ifndef __U_BOOT__
-               } else {
-                       ch = fgetc(i->file);
-               }
-
-#endif
-               debug_printf("b_getch: got a %d\n", ch);
-       }
-#ifndef __U_BOOT__
-       if (ch == '\n') i->__promptme=1;
-#endif
-       return ch;
-}
-
-/* All the callers guarantee this routine will never be
- * used right after a newline, so prompting is not needed.
- */
-static int file_peek(struct in_str *i)
-{
-#ifndef __U_BOOT__
-       if (i->p && *i->p) {
-#endif
-               return *i->p;
-#ifndef __U_BOOT__
-       } else {
-               i->peek_buf[0] = fgetc(i->file);
-               i->peek_buf[1] = '\0';
-               i->p = i->peek_buf;
-               debug_printf("b_peek: got a %d\n", *i->p);
-               return *i->p;
-       }
-#endif
-}
-
-#ifndef __U_BOOT__
-static void setup_file_in_str(struct in_str *i, FILE *f)
-#else
-static void setup_file_in_str(struct in_str *i)
-#endif
-{
-       i->peek = file_peek;
-       i->get = file_get;
-       i->__promptme=1;
-       i->promptmode=1;
-#ifndef __U_BOOT__
-       i->file = f;
-#endif
-       i->p = NULL;
-}
-
-static void setup_string_in_str(struct in_str *i, const char *s)
-{
-       i->peek = static_peek;
-       i->get = static_get;
-       i->__promptme=1;
-       i->promptmode=1;
-       i->p = s;
-}
-
-#ifndef __U_BOOT__
-static void mark_open(int fd)
-{
-       struct close_me *new = xmalloc(sizeof(struct close_me));
-       new->fd = fd;
-       new->next = close_me_head;
-       close_me_head = new;
-}
-
-static void mark_closed(int fd)
-{
-       struct close_me *tmp;
-       if (close_me_head == NULL || close_me_head->fd != fd)
-               error_msg_and_die("corrupt close_me");
-       tmp = close_me_head;
-       close_me_head = close_me_head->next;
-       free(tmp);
-}
-
-static void close_all(void)
-{
-       struct close_me *c;
-       for (c=close_me_head; c; c=c->next) {
-               close(c->fd);
-       }
-       close_me_head = NULL;
-}
-
-/* squirrel != NULL means we squirrel away copies of stdin, stdout,
- * and stderr if they are redirected. */
-static int setup_redirects(struct child_prog *prog, int squirrel[])
-{
-       int openfd, mode;
-       struct redir_struct *redir;
-
-       for (redir=prog->redirects; redir; redir=redir->next) {
-               if (redir->dup == -1 && redir->word.gl_pathv == NULL) {
-                       /* something went wrong in the parse.  Pretend it didn't happen */
-                       continue;
-               }
-               if (redir->dup == -1) {
-                       mode=redir_table[redir->type].mode;
-                       openfd = open(redir->word.gl_pathv[0], mode, 0666);
-                       if (openfd < 0) {
-                       /* this could get lost if stderr has been redirected, but
-                          bash and ash both lose it as well (though zsh doesn't!) */
-                               perror_msg("error opening %s", redir->word.gl_pathv[0]);
-                               return 1;
-                       }
-               } else {
-                       openfd = redir->dup;
-               }
-
-               if (openfd != redir->fd) {
-                       if (squirrel && redir->fd < 3) {
-                               squirrel[redir->fd] = dup(redir->fd);
-                       }
-                       if (openfd == -3) {
-                               close(openfd);
-                       } else {
-                               dup2(openfd, redir->fd);
-                               if (redir->dup == -1)
-                                       close (openfd);
-                       }
-               }
-       }
-       return 0;
-}
-
-static void restore_redirects(int squirrel[])
-{
-       int i, fd;
-       for (i=0; i<3; i++) {
-               fd = squirrel[i];
-               if (fd != -1) {
-                       /* No error checking.  I sure wouldn't know what
-                        * to do with an error if I found one! */
-                       dup2(fd, i);
-                       close(fd);
-               }
-       }
-}
-
-/* never returns */
-/* XXX no exit() here.  If you don't exec, use _exit instead.
- * The at_exit handlers apparently confuse the calling process,
- * in particular stdin handling.  Not sure why? */
-static void pseudo_exec(struct child_prog *child)
-{
-       int i, rcode;
-       char *p;
-       struct built_in_command *x;
-       if (child->argv) {
-               for (i=0; is_assignment(child->argv[i]); i++) {
-                       debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
-                       p = insert_var_value(child->argv[i]);
-                       putenv(strdup(p));
-                       if (p != child->argv[i]) free(p);
-               }
-               child->argv+=i;  /* XXX this hack isn't so horrible, since we are about
-                                       to exit, and therefore don't need to keep data
-                                       structures consistent for free() use. */
-               /* If a variable is assigned in a forest, and nobody listens,
-                * was it ever really set?
-                */
-               if (child->argv[0] == NULL) {
-                       _exit(EXIT_SUCCESS);
-               }
-
-               /*
-                * Check if the command matches any of the builtins.
-                * Depending on context, this might be redundant.  But it's
-                * easier to waste a few CPU cycles than it is to figure out
-                * if this is one of those cases.
-                */
-               for (x = bltins; x->cmd; x++) {
-                       if (strcmp(child->argv[0], x->cmd) == 0 ) {
-                               debug_printf("builtin exec %s\n", child->argv[0]);
-                               rcode = x->function(child);
-                               fflush(stdout);
-                               _exit(rcode);
-                       }
-               }
-
-               /* Check if the command matches any busybox internal commands
-                * ("applets") here.
-                * FIXME: This feature is not 100% safe, since
-                * BusyBox is not fully reentrant, so we have no guarantee the things
-                * from the .bss are still zeroed, or that things from .data are still
-                * at their defaults.  We could exec ourself from /proc/self/exe, but I
-                * really dislike relying on /proc for things.  We could exec ourself
-                * from global_argv[0], but if we are in a chroot, we may not be able
-                * to find ourself... */
-#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
-               {
-                       int argc_l;
-                       char** argv_l=child->argv;
-                       char *name = child->argv[0];
-
-#ifdef CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
-                       /* Following discussions from November 2000 on the busybox mailing
-                        * list, the default configuration, (without
-                        * get_last_path_component()) lets the user force use of an
-                        * external command by specifying the full (with slashes) filename.
-                        * If you enable CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN then applets
-                        * _aways_ override external commands, so if you want to run
-                        * /bin/cat, it will use BusyBox cat even if /bin/cat exists on the
-                        * filesystem and is _not_ busybox.  Some systems may want this,
-                        * most do not.  */
-                       name = get_last_path_component(name);
-#endif
-                       /* Count argc for use in a second... */
-                       for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
-                       optind = 1;
-                       debug_printf("running applet %s\n", name);
-                       run_applet_by_name(name, argc_l, child->argv);
-               }
-#endif
-               debug_printf("exec of %s\n",child->argv[0]);
-               execvp(child->argv[0],child->argv);
-               perror_msg("couldn't exec: %s",child->argv[0]);
-               _exit(1);
-       } else if (child->group) {
-               debug_printf("runtime nesting to group\n");
-               interactive=0;    /* crucial!!!! */
-               rcode = run_list_real(child->group);
-               /* OK to leak memory by not calling free_pipe_list,
-                * since this process is about to exit */
-               _exit(rcode);
-       } else {
-               /* Can happen.  See what bash does with ">foo" by itself. */
-               debug_printf("trying to pseudo_exec null command\n");
-               _exit(EXIT_SUCCESS);
-       }
-}
-
-static void insert_bg_job(struct pipe *pi)
-{
-       struct pipe *thejob;
-
-       /* Linear search for the ID of the job to use */
-       pi->jobid = 1;
-       for (thejob = job_list; thejob; thejob = thejob->next)
-               if (thejob->jobid >= pi->jobid)
-                       pi->jobid = thejob->jobid + 1;
-
-       /* add thejob to the list of running jobs */
-       if (!job_list) {
-               thejob = job_list = xmalloc(sizeof(*thejob));
-       } else {
-               for (thejob = job_list; thejob->next; thejob = thejob->next) /* nothing */;
-               thejob->next = xmalloc(sizeof(*thejob));
-               thejob = thejob->next;
-       }
-
-       /* physically copy the struct job */
-       memcpy(thejob, pi, sizeof(struct pipe));
-       thejob->next = NULL;
-       thejob->running_progs = thejob->num_progs;
-       thejob->stopped_progs = 0;
-       thejob->text = xmalloc(BUFSIZ); /* cmdedit buffer size */
-
-       /*if (pi->progs[0] && pi->progs[0].argv && pi->progs[0].argv[0]) */
-       {
-               char *bar=thejob->text;
-               char **foo=pi->progs[0].argv;
-               while(foo && *foo) {
-                       bar += sprintf(bar, "%s ", *foo++);
-               }
-       }
-
-       /* we don't wait for background thejobs to return -- append it
-          to the list of backgrounded thejobs and leave it alone */
-       printf("[%d] %d\n", thejob->jobid, thejob->progs[0].pid);
-       last_bg_pid = thejob->progs[0].pid;
-       last_jobid = thejob->jobid;
-}
-
-/* remove a backgrounded job */
-static void remove_bg_job(struct pipe *pi)
-{
-       struct pipe *prev_pipe;
-
-       if (pi == job_list) {
-               job_list = pi->next;
-       } else {
-               prev_pipe = job_list;
-               while (prev_pipe->next != pi)
-                       prev_pipe = prev_pipe->next;
-               prev_pipe->next = pi->next;
-       }
-       if (job_list)
-               last_jobid = job_list->jobid;
-       else
-               last_jobid = 0;
-
-       pi->stopped_progs = 0;
-       free_pipe(pi, 0);
-       free(pi);
-}
-
-/* Checks to see if any processes have exited -- if they
-   have, figure out why and see if a job has completed */
-static int checkjobs(struct pipe* fg_pipe)
-{
-       int attributes;
-       int status;
-       int prognum = 0;
-       struct pipe *pi;
-       pid_t childpid;
-
-       attributes = WUNTRACED;
-       if (fg_pipe==NULL) {
-               attributes |= WNOHANG;
-       }
-
-       while ((childpid = waitpid(-1, &status, attributes)) > 0) {
-               if (fg_pipe) {
-                       int i, rcode = 0;
-                       for (i=0; i < fg_pipe->num_progs; i++) {
-                               if (fg_pipe->progs[i].pid == childpid) {
-                                       if (i==fg_pipe->num_progs-1)
-                                               rcode=WEXITSTATUS(status);
-                                       (fg_pipe->num_progs)--;
-                                       return(rcode);
-                               }
-                       }
-               }
-
-               for (pi = job_list; pi; pi = pi->next) {
-                       prognum = 0;
-                       while (prognum < pi->num_progs && pi->progs[prognum].pid != childpid) {
-                               prognum++;
-                       }
-                       if (prognum < pi->num_progs)
-                               break;
-               }
-
-               if(pi==NULL) {
-                       debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
-                       continue;
-               }
-
-               if (WIFEXITED(status) || WIFSIGNALED(status)) {
-                       /* child exited */
-                       pi->running_progs--;
-                       pi->progs[prognum].pid = 0;
-
-                       if (!pi->running_progs) {
-                               printf(JOB_STATUS_FORMAT, pi->jobid, "Done", pi->text);
-                               remove_bg_job(pi);
-                       }
-               } else {
-                       /* child stopped */
-                       pi->stopped_progs++;
-                       pi->progs[prognum].is_stopped = 1;
-
-#if 0
-                       /* Printing this stuff is a pain, since it tends to
-                        * overwrite the prompt an inconveinient moments.  So
-                        * don't do that.  */
-                       if (pi->stopped_progs == pi->num_progs) {
-                               printf("\n"JOB_STATUS_FORMAT, pi->jobid, "Stopped", pi->text);
-                       }
-#endif
-               }
-       }
-
-       if (childpid == -1 && errno != ECHILD)
-               perror_msg("waitpid");
-
-       /* move the shell to the foreground */
-       /*if (interactive && tcsetpgrp(shell_terminal, getpgid(0))) */
-       /*      perror_msg("tcsetpgrp-2"); */
-       return -1;
-}
-
-/* Figure out our controlling tty, checking in order stderr,
- * stdin, and stdout.  If check_pgrp is set, also check that
- * we belong to the foreground process group associated with
- * that tty.  The value of shell_terminal is needed in order to call
- * tcsetpgrp(shell_terminal, ...); */
-void controlling_tty(int check_pgrp)
-{
-       pid_t curpgrp;
-
-       if ((curpgrp = tcgetpgrp(shell_terminal = 2)) < 0
-                       && (curpgrp = tcgetpgrp(shell_terminal = 0)) < 0
-                       && (curpgrp = tcgetpgrp(shell_terminal = 1)) < 0)
-               goto shell_terminal_error;
-
-       if (check_pgrp && curpgrp != getpgid(0))
-               goto shell_terminal_error;
-
-       return;
-
-shell_terminal_error:
-               shell_terminal = -1;
-               return;
-}
-#endif
-
-/* run_pipe_real() starts all the jobs, but doesn't wait for anything
- * to finish.  See checkjobs().
- *
- * return code is normally -1, when the caller has to wait for children
- * to finish to determine the exit status of the pipe.  If the pipe
- * is a simple builtin command, however, the action is done by the
- * time run_pipe_real returns, and the exit code is provided as the
- * return value.
- *
- * The input of the pipe is always stdin, the output is always
- * stdout.  The outpipe[] mechanism in BusyBox-0.48 lash is bogus,
- * because it tries to avoid running the command substitution in
- * subshell, when that is in fact necessary.  The subshell process
- * now has its stdout directed to the input of the appropriate pipe,
- * so this routine is noticeably simpler.
- */
-static int run_pipe_real(struct pipe *pi)
-{
-       int i;
-#ifndef __U_BOOT__
-       int nextin, nextout;
-       int pipefds[2];                         /* pipefds[0] is for reading */
-       struct child_prog *child;
-       struct built_in_command *x;
-       char *p;
-# if __GNUC__
-       /* Avoid longjmp clobbering */
-       (void) &i;
-       (void) &nextin;
-       (void) &nextout;
-       (void) &child;
-# endif
-#else
-       int nextin;
-       int flag = do_repeat ? CMD_FLAG_REPEAT : 0;
-       struct child_prog *child;
-       char *p;
-# if __GNUC__
-       /* Avoid longjmp clobbering */
-       (void) &i;
-       (void) &nextin;
-       (void) &child;
-# endif
-#endif /* __U_BOOT__ */
-
-       nextin = 0;
-#ifndef __U_BOOT__
-       pi->pgrp = -1;
-#endif
-
-       /* Check if this is a simple builtin (not part of a pipe).
-        * Builtins within pipes have to fork anyway, and are handled in
-        * pseudo_exec.  "echo foo | read bar" doesn't work on bash, either.
-        */
-       if (pi->num_progs == 1) child = & (pi->progs[0]);
-#ifndef __U_BOOT__
-       if (pi->num_progs == 1 && child->group && child->subshell == 0) {
-               int squirrel[] = {-1, -1, -1};
-               int rcode;
-               debug_printf("non-subshell grouping\n");
-               setup_redirects(child, squirrel);
-               /* XXX could we merge code with following builtin case,
-                * by creating a pseudo builtin that calls run_list_real? */
-               rcode = run_list_real(child->group);
-               restore_redirects(squirrel);
-#else
-               if (pi->num_progs == 1 && child->group) {
-               int rcode;
-               debug_printf("non-subshell grouping\n");
-               rcode = run_list_real(child->group);
-#endif
-               return rcode;
-       } else if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
-               for (i=0; is_assignment(child->argv[i]); i++) { /* nothing */ }
-               if (i!=0 && child->argv[i]==NULL) {
-                       /* assignments, but no command: set the local environment */
-                       for (i=0; child->argv[i]!=NULL; i++) {
-
-                               /* Ok, this case is tricky.  We have to decide if this is a
-                                * local variable, or an already exported variable.  If it is
-                                * already exported, we have to export the new value.  If it is
-                                * not exported, we need only set this as a local variable.
-                                * This junk is all to decide whether or not to export this
-                                * variable. */
-                               int export_me=0;
-                               char *name, *value;
-                               name = xstrdup(child->argv[i]);
-                               debug_printf("Local environment set: %s\n", name);
-                               value = strchr(name, '=');
-                               if (value)
-                                       *value=0;
-#ifndef __U_BOOT__
-                               if ( get_local_var(name)) {
-                                       export_me=1;
-                               }
-#endif
-                               free(name);
-                               p = insert_var_value(child->argv[i]);
-                               set_local_var(p, export_me);
-                               if (p != child->argv[i]) free(p);
-                       }
-                       return EXIT_SUCCESS;   /* don't worry about errors in set_local_var() yet */
-               }
-               for (i = 0; is_assignment(child->argv[i]); i++) {
-                       p = insert_var_value(child->argv[i]);
-#ifndef __U_BOOT__
-                       putenv(strdup(p));
-#else
-                       set_local_var(p, 0);
-#endif
-                       if (p != child->argv[i]) {
-                               child->sp--;
-                               free(p);
-                       }
-               }
-               if (child->sp) {
-                       char * str = NULL;
-
-                       str = make_string(child->argv + i,
-                                         child->argv_nonnull + i);
-                       parse_string_outer(str, FLAG_EXIT_FROM_LOOP | FLAG_REPARSING);
-                       free(str);
-                       return last_return_code;
-               }
-#ifndef __U_BOOT__
-               for (x = bltins; x->cmd; x++) {
-                       if (strcmp(child->argv[i], x->cmd) == 0 ) {
-                               int squirrel[] = {-1, -1, -1};
-                               int rcode;
-                               if (x->function == builtin_exec && child->argv[i+1]==NULL) {
-                                       debug_printf("magic exec\n");
-                                       setup_redirects(child,NULL);
-                                       return EXIT_SUCCESS;
-                               }
-                               debug_printf("builtin inline %s\n", child->argv[0]);
-                               /* XXX setup_redirects acts on file descriptors, not FILEs.
-                                * This is perfect for work that comes after exec().
-                                * Is it really safe for inline use?  Experimentally,
-                                * things seem to work with glibc. */
-                               setup_redirects(child, squirrel);
-
-                               child->argv += i;  /* XXX horrible hack */
-                               rcode = x->function(child);
-                               /* XXX restore hack so free() can work right */
-                               child->argv -= i;
-                               restore_redirects(squirrel);
-                       }
-                       return rcode;
-               }
-#else
-               /* check ";", because ,example , argv consist from
-                * "help;flinfo" must not execute
-                */
-               if (strchr(child->argv[i], ';')) {
-                       printf("Unknown command '%s' - try 'help' or use "
-                                       "'run' command\n", child->argv[i]);
-                       return -1;
-               }
-               /* Process the command */
-               return cmd_process(flag, child->argc, child->argv,
-                                  &flag_repeat, NULL);
-#endif
-       }
-#ifndef __U_BOOT__
-
-       for (i = 0; i < pi->num_progs; i++) {
-               child = & (pi->progs[i]);
-
-               /* pipes are inserted between pairs of commands */
-               if ((i + 1) < pi->num_progs) {
-                       if (pipe(pipefds)<0) perror_msg_and_die("pipe");
-                       nextout = pipefds[1];
-               } else {
-                       nextout=1;
-                       pipefds[0] = -1;
-               }
-
-               /* XXX test for failed fork()? */
-               if (!(child->pid = fork())) {
-                       /* Set the handling for job control signals back to the default.  */
-                       signal(SIGINT, SIG_DFL);
-                       signal(SIGQUIT, SIG_DFL);
-                       signal(SIGTERM, SIG_DFL);
-                       signal(SIGTSTP, SIG_DFL);
-                       signal(SIGTTIN, SIG_DFL);
-                       signal(SIGTTOU, SIG_DFL);
-                       signal(SIGCHLD, SIG_DFL);
-
-                       close_all();
-
-                       if (nextin != 0) {
-                               dup2(nextin, 0);
-                               close(nextin);
-                       }
-                       if (nextout != 1) {
-                               dup2(nextout, 1);
-                               close(nextout);
-                       }
-                       if (pipefds[0]!=-1) {
-                               close(pipefds[0]);  /* opposite end of our output pipe */
-                       }
-
-                       /* Like bash, explicit redirects override pipes,
-                        * and the pipe fd is available for dup'ing. */
-                       setup_redirects(child,NULL);
-
-                       if (interactive && pi->followup!=PIPE_BG) {
-                               /* If we (the child) win the race, put ourselves in the process
-                                * group whose leader is the first process in this pipe. */
-                               if (pi->pgrp < 0) {
-                                       pi->pgrp = getpid();
-                               }
-                               if (setpgid(0, pi->pgrp) == 0) {
-                                       tcsetpgrp(2, pi->pgrp);
-                               }
-                       }
-
-                       pseudo_exec(child);
-               }
-
-
-               /* put our child in the process group whose leader is the
-                  first process in this pipe */
-               if (pi->pgrp < 0) {
-                       pi->pgrp = child->pid;
-               }
-               /* Don't check for errors.  The child may be dead already,
-                * in which case setpgid returns error code EACCES. */
-               setpgid(child->pid, pi->pgrp);
-
-               if (nextin != 0)
-                       close(nextin);
-               if (nextout != 1)
-                       close(nextout);
-
-               /* If there isn't another process, nextin is garbage
-                  but it doesn't matter */
-               nextin = pipefds[0];
-       }
-#endif
-       return -1;
-}
-
-static int run_list_real(struct pipe *pi)
-{
-       char *save_name = NULL;
-       char **list = NULL;
-       char **save_list = NULL;
-       struct pipe *rpipe;
-       int flag_rep = 0;
-#ifndef __U_BOOT__
-       int save_num_progs;
-#endif
-       int rcode=0, flag_skip=1;
-       int flag_restore = 0;
-       int if_code=0, next_if_code=0;  /* need double-buffer to handle elif */
-       reserved_style rmode, skip_more_in_this_rmode=RES_XXXX;
-       /* check syntax for "for" */
-       for (rpipe = pi; rpipe; rpipe = rpipe->next) {
-               if ((rpipe->r_mode == RES_IN ||
-                   rpipe->r_mode == RES_FOR) &&
-                   (rpipe->next == NULL)) {
-                               syntax();
-#ifdef __U_BOOT__
-                               flag_repeat = 0;
-#endif
-                               return 1;
-               }
-               if ((rpipe->r_mode == RES_IN &&
-                       (rpipe->next->r_mode == RES_IN &&
-                       rpipe->next->progs->argv != NULL))||
-                       (rpipe->r_mode == RES_FOR &&
-                       rpipe->next->r_mode != RES_IN)) {
-                               syntax();
-#ifdef __U_BOOT__
-                               flag_repeat = 0;
-#endif
-                               return 1;
-               }
-       }
-       for (; pi; pi = (flag_restore != 0) ? rpipe : pi->next) {
-               if (pi->r_mode == RES_WHILE || pi->r_mode == RES_UNTIL ||
-                       pi->r_mode == RES_FOR) {
-#ifdef __U_BOOT__
-                               /* check Ctrl-C */
-                               ctrlc();
-                               if ((had_ctrlc())) {
-                                       return 1;
-                               }
-#endif
-                               flag_restore = 0;
-                               if (!rpipe) {
-                                       flag_rep = 0;
-                                       rpipe = pi;
-                               }
-               }
-               rmode = pi->r_mode;
-               debug_printf("rmode=%d  if_code=%d  next_if_code=%d skip_more=%d\n", rmode, if_code, next_if_code, skip_more_in_this_rmode);
-               if (rmode == skip_more_in_this_rmode && flag_skip) {
-                       if (pi->followup == PIPE_SEQ) flag_skip=0;
-                       continue;
-               }
-               flag_skip = 1;
-               skip_more_in_this_rmode = RES_XXXX;
-               if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code;
-               if (rmode == RES_THEN &&  if_code) continue;
-               if (rmode == RES_ELSE && !if_code) continue;
-               if (rmode == RES_ELIF && !if_code) break;
-               if (rmode == RES_FOR && pi->num_progs) {
-                       if (!list) {
-                               /* if no variable values after "in" we skip "for" */
-                               if (!pi->next->progs->argv) continue;
-                               /* create list of variable values */
-                               list = make_list_in(pi->next->progs->argv,
-                                       pi->progs->argv[0]);
-                               save_list = list;
-                               save_name = pi->progs->argv[0];
-                               pi->progs->argv[0] = NULL;
-                               flag_rep = 1;
-                       }
-                       if (!(*list)) {
-                               free(pi->progs->argv[0]);
-                               free(save_list);
-                               list = NULL;
-                               flag_rep = 0;
-                               pi->progs->argv[0] = save_name;
-#ifndef __U_BOOT__
-                               pi->progs->glob_result.gl_pathv[0] =
-                                       pi->progs->argv[0];
-#endif
-                               continue;
-                       } else {
-                               /* insert new value from list for variable */
-                               if (pi->progs->argv[0])
-                                       free(pi->progs->argv[0]);
-                               pi->progs->argv[0] = *list++;
-#ifndef __U_BOOT__
-                               pi->progs->glob_result.gl_pathv[0] =
-                                       pi->progs->argv[0];
-#endif
-                       }
-               }
-               if (rmode == RES_IN) continue;
-               if (rmode == RES_DO) {
-                       if (!flag_rep) continue;
-               }
-               if ((rmode == RES_DONE)) {
-                       if (flag_rep) {
-                               flag_restore = 1;
-                       } else {
-                               rpipe = NULL;
-                       }
-               }
-               if (pi->num_progs == 0) continue;
-#ifndef __U_BOOT__
-               save_num_progs = pi->num_progs; /* save number of programs */
-#endif
-               rcode = run_pipe_real(pi);
-               debug_printf("run_pipe_real returned %d\n",rcode);
-#ifndef __U_BOOT__
-               if (rcode!=-1) {
-                       /* We only ran a builtin: rcode was set by the return value
-                        * of run_pipe_real(), and we don't need to wait for anything. */
-               } else if (pi->followup==PIPE_BG) {
-                       /* XXX check bash's behavior with nontrivial pipes */
-                       /* XXX compute jobid */
-                       /* XXX what does bash do with attempts to background builtins? */
-                       insert_bg_job(pi);
-                       rcode = EXIT_SUCCESS;
-               } else {
-                       if (interactive) {
-                               /* move the new process group into the foreground */
-                               if (tcsetpgrp(shell_terminal, pi->pgrp) && errno != ENOTTY)
-                                       perror_msg("tcsetpgrp-3");
-                               rcode = checkjobs(pi);
-                               /* move the shell to the foreground */
-                               if (tcsetpgrp(shell_terminal, getpgid(0)) && errno != ENOTTY)
-                                       perror_msg("tcsetpgrp-4");
-                       } else {
-                               rcode = checkjobs(pi);
-                       }
-                       debug_printf("checkjobs returned %d\n",rcode);
-               }
-               last_return_code=rcode;
-#else
-               if (rcode < -1) {
-                       last_return_code = -rcode - 2;
-                       return -2;      /* exit */
-               }
-               last_return_code=(rcode == 0) ? 0 : 1;
-#endif
-#ifndef __U_BOOT__
-               pi->num_progs = save_num_progs; /* restore number of programs */
-#endif
-               if ( rmode == RES_IF || rmode == RES_ELIF )
-                       next_if_code=rcode;  /* can be overwritten a number of times */
-               if (rmode == RES_WHILE)
-                       flag_rep = !last_return_code;
-               if (rmode == RES_UNTIL)
-                       flag_rep = last_return_code;
-               if ( (rcode==EXIT_SUCCESS && pi->followup==PIPE_OR) ||
-                    (rcode!=EXIT_SUCCESS && pi->followup==PIPE_AND) )
-                       skip_more_in_this_rmode=rmode;
-#ifndef __U_BOOT__
-               checkjobs(NULL);
-#endif
-       }
-       return rcode;
-}
-
-/* broken, of course, but OK for testing */
-static char *indenter(int i)
-{
-       static char blanks[]="                                    ";
-       return &blanks[sizeof(blanks)-i-1];
-}
-
-/* return code is the exit status of the pipe */
-static int free_pipe(struct pipe *pi, int indent)
-{
-       char **p;
-       struct child_prog *child;
-#ifndef __U_BOOT__
-       struct redir_struct *r, *rnext;
-#endif
-       int a, i, ret_code=0;
-       char *ind = indenter(indent);
-
-#ifndef __U_BOOT__
-       if (pi->stopped_progs > 0)
-               return ret_code;
-       final_printf("%s run pipe: (pid %d)\n",ind,getpid());
-#endif
-       for (i=0; i<pi->num_progs; i++) {
-               child = &pi->progs[i];
-               final_printf("%s  command %d:\n",ind,i);
-               if (child->argv) {
-                       for (a=0,p=child->argv; *p; a++,p++) {
-                               final_printf("%s   argv[%d] = %s\n",ind,a,*p);
-                       }
-#ifndef __U_BOOT__
-                       globfree(&child->glob_result);
-#else
-                       for (a = 0; a < child->argc; a++) {
-                               free(child->argv[a]);
-                       }
-                       free(child->argv);
-                       free(child->argv_nonnull);
-                       child->argc = 0;
-#endif
-                       child->argv=NULL;
-               } else if (child->group) {
-#ifndef __U_BOOT__
-                       final_printf("%s   begin group (subshell:%d)\n",ind, child->subshell);
-#endif
-                       ret_code = free_pipe_list(child->group,indent+3);
-                       final_printf("%s   end group\n",ind);
-               } else {
-                       final_printf("%s   (nil)\n",ind);
-               }
-#ifndef __U_BOOT__
-               for (r=child->redirects; r; r=rnext) {
-                       final_printf("%s   redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
-                       if (r->dup == -1) {
-                               /* guard against the case >$FOO, where foo is unset or blank */
-                               if (r->word.gl_pathv) {
-                                       final_printf(" %s\n", *r->word.gl_pathv);
-                                       globfree(&r->word);
-                               }
-                       } else {
-                               final_printf("&%d\n", r->dup);
-                       }
-                       rnext=r->next;
-                       free(r);
-               }
-               child->redirects=NULL;
-#endif
-       }
-       free(pi->progs);   /* children are an array, they get freed all at once */
-       pi->progs=NULL;
-       return ret_code;
-}
-
-static int free_pipe_list(struct pipe *head, int indent)
-{
-       int rcode=0;   /* if list has no members */
-       struct pipe *pi, *next;
-       char *ind = indenter(indent);
-       for (pi=head; pi; pi=next) {
-               final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
-               rcode = free_pipe(pi, indent);
-               final_printf("%s pipe followup code %d\n", ind, pi->followup);
-               next=pi->next;
-               pi->next=NULL;
-               free(pi);
-       }
-       return rcode;
-}
-
-/* Select which version we will use */
-static int run_list(struct pipe *pi)
-{
-       int rcode=0;
-#ifndef __U_BOOT__
-       if (fake_mode==0) {
-#endif
-               rcode = run_list_real(pi);
-#ifndef __U_BOOT__
-       }
-#endif
-       /* free_pipe_list has the side effect of clearing memory
-        * In the long run that function can be merged with run_list_real,
-        * but doing that now would hobble the debugging effort. */
-       free_pipe_list(pi,0);
-       return rcode;
-}
-
-/* The API for glob is arguably broken.  This routine pushes a non-matching
- * string into the output structure, removing non-backslashed backslashes.
- * If someone can prove me wrong, by performing this function within the
- * original glob(3) api, feel free to rewrite this routine into oblivion.
- * Return code (0 vs. GLOB_NOSPACE) matches glob(3).
- * XXX broken if the last character is '\\', check that before calling.
- */
-#ifndef __U_BOOT__
-static int globhack(const char *src, int flags, glob_t *pglob)
-{
-       int cnt=0, pathc;
-       const char *s;
-       char *dest;
-       for (cnt=1, s=src; s && *s; s++) {
-               if (*s == '\\') s++;
-               cnt++;
-       }
-       dest = malloc(cnt);
-       if (!dest) return GLOB_NOSPACE;
-       if (!(flags & GLOB_APPEND)) {
-               pglob->gl_pathv=NULL;
-               pglob->gl_pathc=0;
-               pglob->gl_offs=0;
-               pglob->gl_offs=0;
-       }
-       pathc = ++pglob->gl_pathc;
-       pglob->gl_pathv = realloc(pglob->gl_pathv, (pathc+1)*sizeof(*pglob->gl_pathv));
-       if (pglob->gl_pathv == NULL) return GLOB_NOSPACE;
-       pglob->gl_pathv[pathc-1]=dest;
-       pglob->gl_pathv[pathc]=NULL;
-       for (s=src; s && *s; s++, dest++) {
-               if (*s == '\\') s++;
-               *dest = *s;
-       }
-       *dest='\0';
-       return 0;
-}
-
-/* XXX broken if the last character is '\\', check that before calling */
-static int glob_needed(const char *s)
-{
-       for (; *s; s++) {
-               if (*s == '\\') s++;
-               if (strchr("*[?",*s)) return 1;
-       }
-       return 0;
-}
-
-#if 0
-static void globprint(glob_t *pglob)
-{
-       int i;
-       debug_printf("glob_t at %p:\n", pglob);
-       debug_printf("  gl_pathc=%d  gl_pathv=%p  gl_offs=%d  gl_flags=%d\n",
-               pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
-       for (i=0; i<pglob->gl_pathc; i++)
-               debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
-                       pglob->gl_pathv[i], pglob->gl_pathv[i]);
-}
-#endif
-
-static int xglob(o_string *dest, int flags, glob_t *pglob)
-{
-       int gr;
-
-       /* short-circuit for null word */
-       /* we can code this better when the debug_printf's are gone */
-       if (dest->length == 0) {
-               if (dest->nonnull) {
-                       /* bash man page calls this an "explicit" null */
-                       gr = globhack(dest->data, flags, pglob);
-                       debug_printf("globhack returned %d\n",gr);
-               } else {
-                       return 0;
-               }
-       } else if (glob_needed(dest->data)) {
-               gr = glob(dest->data, flags, NULL, pglob);
-               debug_printf("glob returned %d\n",gr);
-               if (gr == GLOB_NOMATCH) {
-                       /* quote removal, or more accurately, backslash removal */
-                       gr = globhack(dest->data, flags, pglob);
-                       debug_printf("globhack returned %d\n",gr);
-               }
-       } else {
-               gr = globhack(dest->data, flags, pglob);
-               debug_printf("globhack returned %d\n",gr);
-       }
-       if (gr == GLOB_NOSPACE)
-               error_msg_and_die("out of memory during glob");
-       if (gr != 0) { /* GLOB_ABORTED ? */
-               error_msg("glob(3) error %d",gr);
-       }
-       /* globprint(glob_target); */
-       return gr;
-}
-#endif
-
-#ifdef __U_BOOT__
-static char *get_dollar_var(char ch);
-#endif
-
-/* This is used to get/check local shell variables */
-char *get_local_var(const char *s)
-{
-       struct variables *cur;
-
-       if (!s)
-               return NULL;
-
-#ifdef __U_BOOT__
-       if (*s == '$')
-               return get_dollar_var(s[1]);
-#endif
-
-       for (cur = top_vars; cur; cur=cur->next)
-               if(strcmp(cur->name, s)==0)
-                       return cur->value;
-       return NULL;
-}
-
-/* This is used to set local shell variables
-   flg_export==0 if only local (not exporting) variable
-   flg_export==1 if "new" exporting environ
-   flg_export>1  if current startup environ (not call putenv()) */
-int set_local_var(const char *s, int flg_export)
-{
-       char *name, *value;
-       int result=0;
-       struct variables *cur;
-
-#ifdef __U_BOOT__
-       /* might be possible! */
-       if (!isalpha(*s))
-               return -1;
-#endif
-
-       name=strdup(s);
-
-#ifdef __U_BOOT__
-       if (getenv(name) != NULL) {
-               printf ("ERROR: "
-                               "There is a global environment variable with the same name.\n");
-               free(name);
-               return -1;
-       }
-#endif
-       /* Assume when we enter this function that we are already in
-        * NAME=VALUE format.  So the first order of business is to
-        * split 's' on the '=' into 'name' and 'value' */
-       value = strchr(name, '=');
-       if (value == NULL && ++value == NULL) {
-               free(name);
-               return -1;
-       }
-       *value++ = 0;
-
-       for(cur = top_vars; cur; cur = cur->next) {
-               if(strcmp(cur->name, name)==0)
-                       break;
-       }
-
-       if(cur) {
-               if(strcmp(cur->value, value)==0) {
-                       if(flg_export>0 && cur->flg_export==0)
-                               cur->flg_export=flg_export;
-                       else
-                               result++;
-               } else {
-                       if(cur->flg_read_only) {
-                               error_msg("%s: readonly variable", name);
-                               result = -1;
-                       } else {
-                               if(flg_export>0 || cur->flg_export>1)
-                                       cur->flg_export=1;
-                               free(cur->value);
-
-                               cur->value = strdup(value);
-                       }
-               }
-       } else {
-               cur = malloc(sizeof(struct variables));
-               if(!cur) {
-                       result = -1;
-               } else {
-                       cur->name = strdup(name);
-                       if (cur->name == NULL) {
-                               free(cur);
-                               result = -1;
-                       } else {
-                               struct variables *bottom = top_vars;
-                               cur->value = strdup(value);
-                               cur->next = NULL;
-                               cur->flg_export = flg_export;
-                               cur->flg_read_only = 0;
-                               while(bottom->next) bottom=bottom->next;
-                               bottom->next = cur;
-                       }
-               }
-       }
-
-#ifndef __U_BOOT__
-       if(result==0 && cur->flg_export==1) {
-               *(value-1) = '=';
-               result = putenv(name);
-       } else {
-#endif
-               free(name);
-#ifndef __U_BOOT__
-               if(result>0)            /* equivalent to previous set */
-                       result = 0;
-       }
-#endif
-       return result;
-}
-
-void unset_local_var(const char *name)
-{
-       struct variables *cur;
-
-       if (name) {
-               for (cur = top_vars; cur; cur=cur->next) {
-                       if(strcmp(cur->name, name)==0)
-                               break;
-               }
-               if (cur != NULL) {
-                       struct variables *next = top_vars;
-                       if(cur->flg_read_only) {
-                               error_msg("%s: readonly variable", name);
-                               return;
-                       } else {
-#ifndef __U_BOOT__
-                               if(cur->flg_export)
-                                       unsetenv(cur->name);
-#endif
-                               free(cur->name);
-                               free(cur->value);
-                               while (next->next != cur)
-                                       next = next->next;
-                               next->next = cur->next;
-                       }
-                       free(cur);
-               }
-       }
-}
-
-static int is_assignment(const char *s)
-{
-       if (s == NULL)
-               return 0;
-
-       if (!isalpha(*s)) return 0;
-       ++s;
-       while(isalnum(*s) || *s=='_') ++s;
-       return *s=='=';
-}
-
-#ifndef __U_BOOT__
-/* the src parameter allows us to peek forward to a possible &n syntax
- * for file descriptor duplication, e.g., "2>&1".
- * Return code is 0 normally, 1 if a syntax error is detected in src.
- * Resource errors (in xmalloc) cause the process to exit */
-static int setup_redirect(struct p_context *ctx, int fd, redir_type style,
-       struct in_str *input)
-{
-       struct child_prog *child=ctx->child;
-       struct redir_struct *redir = child->redirects;
-       struct redir_struct *last_redir=NULL;
-
-       /* Create a new redir_struct and drop it onto the end of the linked list */
-       while(redir) {
-               last_redir=redir;
-               redir=redir->next;
-       }
-       redir = xmalloc(sizeof(struct redir_struct));
-       redir->next=NULL;
-       redir->word.gl_pathv=NULL;
-       if (last_redir) {
-               last_redir->next=redir;
-       } else {
-               child->redirects=redir;
-       }
-
-       redir->type=style;
-       redir->fd= (fd==-1) ? redir_table[style].default_fd : fd ;
-
-       debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip);
-
-       /* Check for a '2>&1' type redirect */
-       redir->dup = redirect_dup_num(input);
-       if (redir->dup == -2) return 1;  /* syntax error */
-       if (redir->dup != -1) {
-               /* Erik had a check here that the file descriptor in question
-                * is legit; I postpone that to "run time"
-                * A "-" representation of "close me" shows up as a -3 here */
-               debug_printf("Duplicating redirect '%d>&%d'\n", redir->fd, redir->dup);
-       } else {
-               /* We do _not_ try to open the file that src points to,
-                * since we need to return and let src be expanded first.
-                * Set ctx->pending_redirect, so we know what to do at the
-                * end of the next parsed word.
-                */
-               ctx->pending_redirect = redir;
-       }
-       return 0;
-}
-#endif
-
-static struct pipe *new_pipe(void)
-{
-       struct pipe *pi;
-       pi = xmalloc(sizeof(struct pipe));
-       pi->num_progs = 0;
-       pi->progs = NULL;
-       pi->next = NULL;
-       pi->followup = 0;  /* invalid */
-       pi->r_mode = RES_NONE;
-       return pi;
-}
-
-static void initialize_context(struct p_context *ctx)
-{
-       ctx->pipe=NULL;
-#ifndef __U_BOOT__
-       ctx->pending_redirect=NULL;
-#endif
-       ctx->child=NULL;
-       ctx->list_head=new_pipe();
-       ctx->pipe=ctx->list_head;
-       ctx->w=RES_NONE;
-       ctx->stack=NULL;
-#ifdef __U_BOOT__
-       ctx->old_flag=0;
-#endif
-       done_command(ctx);   /* creates the memory for working child */
-}
-
-/* normal return is 0
- * if a reserved word is found, and processed, return 1
- * should handle if, then, elif, else, fi, for, while, until, do, done.
- * case, function, and select are obnoxious, save those for later.
- */
-struct reserved_combo {
-       char *literal;
-       int code;
-       long flag;
-};
-/* Mostly a list of accepted follow-up reserved words.
- * FLAG_END means we are done with the sequence, and are ready
- * to turn the compound list into a command.
- * FLAG_START means the word must start a new compound list.
- */
-static struct reserved_combo reserved_list[] = {
-       { "if",    RES_IF,    FLAG_THEN | FLAG_START },
-       { "then",  RES_THEN,  FLAG_ELIF | FLAG_ELSE | FLAG_FI },
-       { "elif",  RES_ELIF,  FLAG_THEN },
-       { "else",  RES_ELSE,  FLAG_FI   },
-       { "fi",    RES_FI,    FLAG_END  },
-       { "for",   RES_FOR,   FLAG_IN   | FLAG_START },
-       { "while", RES_WHILE, FLAG_DO   | FLAG_START },
-       { "until", RES_UNTIL, FLAG_DO   | FLAG_START },
-       { "in",    RES_IN,    FLAG_DO   },
-       { "do",    RES_DO,    FLAG_DONE },
-       { "done",  RES_DONE,  FLAG_END  }
-};
-#define NRES (sizeof(reserved_list)/sizeof(struct reserved_combo))
-
-static int reserved_word(o_string *dest, struct p_context *ctx)
-{
-       struct reserved_combo *r;
-       for (r=reserved_list;
-               r<reserved_list+NRES; r++) {
-               if (strcmp(dest->data, r->literal) == 0) {
-                       debug_printf("found reserved word %s, code %d\n",r->literal,r->code);
-                       if (r->flag & FLAG_START) {
-                               struct p_context *new = xmalloc(sizeof(struct p_context));
-                               debug_printf("push stack\n");
-                               if (ctx->w == RES_IN || ctx->w == RES_FOR) {
-                                       syntax();
-                                       free(new);
-                                       ctx->w = RES_SNTX;
-                                       b_reset(dest);
-                                       return 1;
-                               }
-                               *new = *ctx;   /* physical copy */
-                               initialize_context(ctx);
-                               ctx->stack=new;
-                       } else if ( ctx->w == RES_NONE || ! (ctx->old_flag & (1<<r->code))) {
-                               syntax();
-                               ctx->w = RES_SNTX;
-                               b_reset(dest);
-                               return 1;
-                       }
-                       ctx->w=r->code;
-                       ctx->old_flag = r->flag;
-                       if (ctx->old_flag & FLAG_END) {
-                               struct p_context *old;
-                               debug_printf("pop stack\n");
-                               done_pipe(ctx,PIPE_SEQ);
-                               old = ctx->stack;
-                               old->child->group = ctx->list_head;
-#ifndef __U_BOOT__
-                               old->child->subshell = 0;
-#endif
-                               *ctx = *old;   /* physical copy */
-                               free(old);
-                       }
-                       b_reset (dest);
-                       return 1;
-               }
-       }
-       return 0;
-}
-
-/* normal return is 0.
- * Syntax or xglob errors return 1. */
-static int done_word(o_string *dest, struct p_context *ctx)
-{
-       struct child_prog *child=ctx->child;
-#ifndef __U_BOOT__
-       glob_t *glob_target;
-       int gr, flags = 0;
-#else
-       char *str, *s;
-       int argc, cnt;
-#endif
-
-       debug_printf("done_word: %s %p\n", dest->data, child);
-       if (dest->length == 0 && !dest->nonnull) {
-               debug_printf("  true null, ignored\n");
-               return 0;
-       }
-#ifndef __U_BOOT__
-       if (ctx->pending_redirect) {
-               glob_target = &ctx->pending_redirect->word;
-       } else {
-#endif
-               if (child->group) {
-                       syntax();
-                       return 1;  /* syntax error, groups and arglists don't mix */
-               }
-               if (!child->argv && (ctx->type & FLAG_PARSE_SEMICOLON)) {
-                       debug_printf("checking %s for reserved-ness\n",dest->data);
-                       if (reserved_word(dest,ctx)) return ctx->w==RES_SNTX;
-               }
-#ifndef __U_BOOT__
-               glob_target = &child->glob_result;
-               if (child->argv) flags |= GLOB_APPEND;
-#else
-               for (cnt = 1, s = dest->data; s && *s; s++) {
-                       if (*s == '\\') s++;
-                       cnt++;
-               }
-               str = malloc(cnt);
-               if (!str) return 1;
-               if ( child->argv == NULL) {
-                       child->argc=0;
-               }
-               argc = ++child->argc;
-               child->argv = realloc(child->argv, (argc+1)*sizeof(*child->argv));
-               if (child->argv == NULL) return 1;
-               child->argv_nonnull = realloc(child->argv_nonnull,
-                                       (argc+1)*sizeof(*child->argv_nonnull));
-               if (child->argv_nonnull == NULL)
-                       return 1;
-               child->argv[argc-1]=str;
-               child->argv_nonnull[argc-1] = dest->nonnull;
-               child->argv[argc]=NULL;
-               child->argv_nonnull[argc] = 0;
-               for (s = dest->data; s && *s; s++,str++) {
-                       if (*s == '\\') s++;
-                       *str = *s;
-               }
-               *str = '\0';
-#endif
-#ifndef __U_BOOT__
-       }
-       gr = xglob(dest, flags, glob_target);
-       if (gr != 0) return 1;
-#endif
-
-       b_reset(dest);
-#ifndef __U_BOOT__
-       if (ctx->pending_redirect) {
-               ctx->pending_redirect=NULL;
-               if (glob_target->gl_pathc != 1) {
-                       error_msg("ambiguous redirect");
-                       return 1;
-               }
-       } else {
-               child->argv = glob_target->gl_pathv;
-       }
-#endif
-       if (ctx->w == RES_FOR) {
-               done_word(dest,ctx);
-               done_pipe(ctx,PIPE_SEQ);
-       }
-       return 0;
-}
-
-/* The only possible error here is out of memory, in which case
- * xmalloc exits. */
-static int done_command(struct p_context *ctx)
-{
-       /* The child is really already in the pipe structure, so
-        * advance the pipe counter and make a new, null child.
-        * Only real trickiness here is that the uncommitted
-        * child structure, to which ctx->child points, is not
-        * counted in pi->num_progs. */
-       struct pipe *pi=ctx->pipe;
-       struct child_prog *prog=ctx->child;
-
-       if (prog && prog->group == NULL
-                && prog->argv == NULL
-#ifndef __U_BOOT__
-                && prog->redirects == NULL) {
-#else
-                                                                               ) {
-#endif
-               debug_printf("done_command: skipping null command\n");
-               return 0;
-       } else if (prog) {
-               pi->num_progs++;
-               debug_printf("done_command: num_progs incremented to %d\n",pi->num_progs);
-       } else {
-               debug_printf("done_command: initializing\n");
-       }
-       pi->progs = xrealloc(pi->progs, sizeof(*pi->progs) * (pi->num_progs+1));
-
-       prog = pi->progs + pi->num_progs;
-#ifndef __U_BOOT__
-       prog->redirects = NULL;
-#endif
-       prog->argv = NULL;
-       prog->argv_nonnull = NULL;
-#ifndef __U_BOOT__
-       prog->is_stopped = 0;
-#endif
-       prog->group = NULL;
-#ifndef __U_BOOT__
-       prog->glob_result.gl_pathv = NULL;
-       prog->family = pi;
-#endif
-       prog->sp = 0;
-       ctx->child = prog;
-       prog->type = ctx->type;
-
-       /* but ctx->pipe and ctx->list_head remain unchanged */
-       return 0;
-}
-
-static int done_pipe(struct p_context *ctx, pipe_style type)
-{
-       struct pipe *new_p;
-       done_command(ctx);  /* implicit closure of previous command */
-       debug_printf("done_pipe, type %d\n", type);
-       ctx->pipe->followup = type;
-       ctx->pipe->r_mode = ctx->w;
-       new_p=new_pipe();
-       ctx->pipe->next = new_p;
-       ctx->pipe = new_p;
-       ctx->child = NULL;
-       done_command(ctx);  /* set up new pipe to accept commands */
-       return 0;
-}
-
-#ifndef __U_BOOT__
-/* peek ahead in the in_str to find out if we have a "&n" construct,
- * as in "2>&1", that represents duplicating a file descriptor.
- * returns either -2 (syntax error), -1 (no &), or the number found.
- */
-static int redirect_dup_num(struct in_str *input)
-{
-       int ch, d=0, ok=0;
-       ch = b_peek(input);
-       if (ch != '&') return -1;
-
-       b_getch(input);  /* get the & */
-       ch=b_peek(input);
-       if (ch == '-') {
-               b_getch(input);
-               return -3;  /* "-" represents "close me" */
-       }
-       while (isdigit(ch)) {
-               d = d*10+(ch-'0');
-               ok=1;
-               b_getch(input);
-               ch = b_peek(input);
-       }
-       if (ok) return d;
-
-       error_msg("ambiguous redirect");
-       return -2;
-}
-
-/* If a redirect is immediately preceded by a number, that number is
- * supposed to tell which file descriptor to redirect.  This routine
- * looks for such preceding numbers.  In an ideal world this routine
- * needs to handle all the following classes of redirects...
- *     echo 2>foo     # redirects fd  2 to file "foo", nothing passed to echo
- *     echo 49>foo    # redirects fd 49 to file "foo", nothing passed to echo
- *     echo -2>foo    # redirects fd  1 to file "foo",    "-2" passed to echo
- *     echo 49x>foo   # redirects fd  1 to file "foo",   "49x" passed to echo
- * A -1 output from this program means no valid number was found, so the
- * caller should use the appropriate default for this redirection.
- */
-static int redirect_opt_num(o_string *o)
-{
-       int num;
-
-       if (o->length==0) return -1;
-       for(num=0; num<o->length; num++) {
-               if (!isdigit(*(o->data+num))) {
-                       return -1;
-               }
-       }
-       /* reuse num (and save an int) */
-       num=atoi(o->data);
-       b_reset(o);
-       return num;
-}
-
-FILE *generate_stream_from_list(struct pipe *head)
-{
-       FILE *pf;
-#if 1
-       int pid, channel[2];
-       if (pipe(channel)<0) perror_msg_and_die("pipe");
-       pid=fork();
-       if (pid<0) {
-               perror_msg_and_die("fork");
-       } else if (pid==0) {
-               close(channel[0]);
-               if (channel[1] != 1) {
-                       dup2(channel[1],1);
-                       close(channel[1]);
-               }
-#if 0
-#define SURROGATE "surrogate response"
-               write(1,SURROGATE,sizeof(SURROGATE));
-               _exit(run_list(head));
-#else
-               _exit(run_list_real(head));   /* leaks memory */
-#endif
-       }
-       debug_printf("forked child %d\n",pid);
-       close(channel[1]);
-       pf = fdopen(channel[0],"r");
-       debug_printf("pipe on FILE *%p\n",pf);
-#else
-       free_pipe_list(head,0);
-       pf=popen("echo surrogate response","r");
-       debug_printf("started fake pipe on FILE *%p\n",pf);
-#endif
-       return pf;
-}
-
-/* this version hacked for testing purposes */
-/* return code is exit status of the process that is run. */
-static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end)
-{
-       int retcode;
-       o_string result=NULL_O_STRING;
-       struct p_context inner;
-       FILE *p;
-       struct in_str pipe_str;
-       initialize_context(&inner);
-
-       /* recursion to generate command */
-       retcode = parse_stream(&result, &inner, input, subst_end);
-       if (retcode != 0) return retcode;  /* syntax error or EOF */
-       done_word(&result, &inner);
-       done_pipe(&inner, PIPE_SEQ);
-       b_free(&result);
-
-       p=generate_stream_from_list(inner.list_head);
-       if (p==NULL) return 1;
-       mark_open(fileno(p));
-       setup_file_in_str(&pipe_str, p);
-
-       /* now send results of command back into original context */
-       retcode = parse_stream(dest, ctx, &pipe_str, '\0');
-       /* XXX In case of a syntax error, should we try to kill the child?
-        * That would be tough to do right, so just read until EOF. */
-       if (retcode == 1) {
-               while (b_getch(&pipe_str)!=EOF) { /* discard */ };
-       }
-
-       debug_printf("done reading from pipe, pclose()ing\n");
-       /* This is the step that wait()s for the child.  Should be pretty
-        * safe, since we just read an EOF from its stdout.  We could try
-        * to better, by using wait(), and keeping track of background jobs
-        * at the same time.  That would be a lot of work, and contrary
-        * to the KISS philosophy of this program. */
-       mark_closed(fileno(p));
-       retcode=pclose(p);
-       free_pipe_list(inner.list_head,0);
-       debug_printf("pclosed, retcode=%d\n",retcode);
-       /* XXX this process fails to trim a single trailing newline */
-       return retcode;
-}
-
-static int parse_group(o_string *dest, struct p_context *ctx,
-       struct in_str *input, int ch)
-{
-       int rcode, endch=0;
-       struct p_context sub;
-       struct child_prog *child = ctx->child;
-       if (child->argv) {
-               syntax();
-               return 1;  /* syntax error, groups and arglists don't mix */
-       }
-       initialize_context(&sub);
-       switch(ch) {
-               case '(': endch=')'; child->subshell=1; break;
-               case '{': endch='}'; break;
-               default: syntax();   /* really logic error */
-       }
-       rcode=parse_stream(dest,&sub,input,endch);
-       done_word(dest,&sub); /* finish off the final word in the subcontext */
-       done_pipe(&sub, PIPE_SEQ);  /* and the final command there, too */
-       child->group = sub.list_head;
-       return rcode;
-       /* child remains "open", available for possible redirects */
-}
-#endif
-
-/* basically useful version until someone wants to get fancier,
- * see the bash man page under "Parameter Expansion" */
-static char *lookup_param(char *src)
-{
-       char *p;
-       char *sep;
-       char *default_val = NULL;
-       int assign = 0;
-       int expand_empty = 0;
-
-       if (!src)
-               return NULL;
-
-       sep = strchr(src, ':');
-
-       if (sep) {
-               *sep = '\0';
-               if (*(sep + 1) == '-')
-                       default_val = sep+2;
-               if (*(sep + 1) == '=') {
-                       default_val = sep+2;
-                       assign = 1;
-               }
-               if (*(sep + 1) == '+') {
-                       default_val = sep+2;
-                       expand_empty = 1;
-               }
-       }
-
-       p = getenv(src);
-       if (!p)
-               p = get_local_var(src);
-
-       if (!p || strlen(p) == 0) {
-               p = default_val;
-               if (assign) {
-                       char *var = malloc(strlen(src)+strlen(default_val)+2);
-                       if (var) {
-                               sprintf(var, "%s=%s", src, default_val);
-                               set_local_var(var, 0);
-                       }
-                       free(var);
-               }
-       } else if (expand_empty) {
-               p += strlen(p);
-       }
-
-       if (sep)
-               *sep = ':';
-
-       return p;
-}
-
-#ifdef __U_BOOT__
-static char *get_dollar_var(char ch)
-{
-       static char buf[40];
-
-       buf[0] = '\0';
-       switch (ch) {
-               case '?':
-                       sprintf(buf, "%u", (unsigned int)last_return_code);
-                       break;
-               default:
-                       return NULL;
-       }
-       return buf;
-}
-#endif
-
-/* return code: 0 for OK, 1 for syntax error */
-static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
-{
-#ifndef __U_BOOT__
-       int i, advance=0;
-#else
-       int advance=0;
-#endif
-#ifndef __U_BOOT__
-       char sep[]=" ";
-#endif
-       int ch = input->peek(input);  /* first character after the $ */
-       debug_printf("handle_dollar: ch=%c\n",ch);
-       if (isalpha(ch)) {
-               b_addchr(dest, SPECIAL_VAR_SYMBOL);
-               ctx->child->sp++;
-               while(ch=b_peek(input),isalnum(ch) || ch=='_') {
-                       b_getch(input);
-                       b_addchr(dest,ch);
-               }
-               b_addchr(dest, SPECIAL_VAR_SYMBOL);
-#ifndef __U_BOOT__
-       } else if (isdigit(ch)) {
-               i = ch-'0';  /* XXX is $0 special? */
-               if (i<global_argc) {
-                       parse_string(dest, ctx, global_argv[i]); /* recursion */
-               }
-               advance = 1;
-#endif
-       } else switch (ch) {
-#ifndef __U_BOOT__
-               case '$':
-                       b_adduint(dest,getpid());
-                       advance = 1;
-                       break;
-               case '!':
-                       if (last_bg_pid > 0) b_adduint(dest, last_bg_pid);
-                       advance = 1;
-                       break;
-#endif
-               case '?':
-#ifndef __U_BOOT__
-                       b_adduint(dest,last_return_code);
-#else
-                       ctx->child->sp++;
-                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
-                       b_addchr(dest, '$');
-                       b_addchr(dest, '?');
-                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
-#endif
-                       advance = 1;
-                       break;
-#ifndef __U_BOOT__
-               case '#':
-                       b_adduint(dest,global_argc ? global_argc-1 : 0);
-                       advance = 1;
-                       break;
-#endif
-               case '{':
-                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
-                       ctx->child->sp++;
-                       b_getch(input);
-                       /* XXX maybe someone will try to escape the '}' */
-                       while(ch=b_getch(input),ch!=EOF && ch!='}') {
-                               b_addchr(dest,ch);
-                       }
-                       if (ch != '}') {
-                               syntax();
-                               return 1;
-                       }
-                       b_addchr(dest, SPECIAL_VAR_SYMBOL);
-                       break;
-#ifndef __U_BOOT__
-               case '(':
-                       b_getch(input);
-                       process_command_subs(dest, ctx, input, ')');
-                       break;
-               case '*':
-                       sep[0]=ifs[0];
-                       for (i=1; i<global_argc; i++) {
-                               parse_string(dest, ctx, global_argv[i]);
-                               if (i+1 < global_argc) parse_string(dest, ctx, sep);
-                       }
-                       break;
-               case '@':
-               case '-':
-               case '_':
-                       /* still unhandled, but should be eventually */
-                       error_msg("unhandled syntax: $%c",ch);
-                       return 1;
-                       break;
-#endif
-               default:
-                       b_addqchr(dest,'$',dest->quote);
-       }
-       /* Eat the character if the flag was set.  If the compiler
-        * is smart enough, we could substitute "b_getch(input);"
-        * for all the "advance = 1;" above, and also end up with
-        * a nice size-optimized program.  Hah!  That'll be the day.
-        */
-       if (advance) b_getch(input);
-       return 0;
-}
-
-#ifndef __U_BOOT__
-int parse_string(o_string *dest, struct p_context *ctx, const char *src)
-{
-       struct in_str foo;
-       setup_string_in_str(&foo, src);
-       return parse_stream(dest, ctx, &foo, '\0');
-}
-#endif
-
-/* return code is 0 for normal exit, 1 for syntax error */
-static int parse_stream(o_string *dest, struct p_context *ctx,
-                       struct in_str *input, int end_trigger)
-{
-       unsigned int ch, m;
-#ifndef __U_BOOT__
-       int redir_fd;
-       redir_type redir_style;
-#endif
-       int next;
-
-       /* Only double-quote state is handled in the state variable dest->quote.
-        * A single-quote triggers a bypass of the main loop until its mate is
-        * found.  When recursing, quote state is passed in via dest->quote. */
-
-       debug_printf("parse_stream, end_trigger=%d\n",end_trigger);
-       while ((ch=b_getch(input))!=EOF) {
-               m = map[ch];
-#ifdef __U_BOOT__
-               if (input->__promptme == 0) return 1;
-#endif
-               next = (ch == '\n') ? 0 : b_peek(input);
-
-               debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d - %c\n",
-                       ch >= ' ' ? ch : '.', ch, m,
-                       dest->quote, ctx->stack == NULL ? '*' : '.');
-
-               if (m==0 || ((m==1 || m==2) && dest->quote)) {
-                       b_addqchr(dest, ch, dest->quote);
-               } else {
-                       if (m==2) {  /* unquoted IFS */
-                               if (done_word(dest, ctx)) {
-                                       return 1;
-                               }
-                               /* If we aren't performing a substitution, treat a newline as a
-                                * command separator.  */
-                               if (end_trigger != '\0' && ch=='\n')
-                                       done_pipe(ctx,PIPE_SEQ);
-                       }
-                       if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
-                               debug_printf("leaving parse_stream (triggered)\n");
-                               return 0;
-                       }
-#if 0
-                       if (ch=='\n') {
-                               /* Yahoo!  Time to run with it! */
-                               done_pipe(ctx,PIPE_SEQ);
-                               run_list(ctx->list_head);
-                               initialize_context(ctx);
-                       }
-#endif
-                       if (m!=2) switch (ch) {
-               case '#':
-                       if (dest->length == 0 && !dest->quote) {
-                               while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
-                       } else {
-                               b_addqchr(dest, ch, dest->quote);
-                       }
-                       break;
-               case '\\':
-                       if (next == EOF) {
-                               syntax();
-                               return 1;
-                       }
-                       b_addqchr(dest, '\\', dest->quote);
-                       b_addqchr(dest, b_getch(input), dest->quote);
-                       break;
-               case '$':
-                       if (handle_dollar(dest, ctx, input)!=0) return 1;
-                       break;
-               case '\'':
-                       dest->nonnull = 1;
-                       while(ch=b_getch(input),ch!=EOF && ch!='\'') {
-#ifdef __U_BOOT__
-                               if(input->__promptme == 0) return 1;
-#endif
-                               b_addchr(dest,ch);
-                       }
-                       if (ch==EOF) {
-                               syntax();
-                               return 1;
-                       }
-                       break;
-               case '"':
-                       dest->nonnull = 1;
-                       dest->quote = !dest->quote;
-                       break;
-#ifndef __U_BOOT__
-               case '`':
-                       process_command_subs(dest, ctx, input, '`');
-                       break;
-               case '>':
-                       redir_fd = redirect_opt_num(dest);
-                       done_word(dest, ctx);
-                       redir_style=REDIRECT_OVERWRITE;
-                       if (next == '>') {
-                               redir_style=REDIRECT_APPEND;
-                               b_getch(input);
-                       } else if (next == '(') {
-                               syntax();   /* until we support >(list) Process Substitution */
-                               return 1;
-                       }
-                       setup_redirect(ctx, redir_fd, redir_style, input);
-                       break;
-               case '<':
-                       redir_fd = redirect_opt_num(dest);
-                       done_word(dest, ctx);
-                       redir_style=REDIRECT_INPUT;
-                       if (next == '<') {
-                               redir_style=REDIRECT_HEREIS;
-                               b_getch(input);
-                       } else if (next == '>') {
-                               redir_style=REDIRECT_IO;
-                               b_getch(input);
-                       } else if (next == '(') {
-                               syntax();   /* until we support <(list) Process Substitution */
-                               return 1;
-                       }
-                       setup_redirect(ctx, redir_fd, redir_style, input);
-                       break;
-#endif
-               case ';':
-                       done_word(dest, ctx);
-                       done_pipe(ctx,PIPE_SEQ);
-                       break;
-               case '&':
-                       done_word(dest, ctx);
-                       if (next=='&') {
-                               b_getch(input);
-                               done_pipe(ctx,PIPE_AND);
-                       } else {
-#ifndef __U_BOOT__
-                               done_pipe(ctx,PIPE_BG);
-#else
-                               syntax_err();
-                               return 1;
-#endif
-                       }
-                       break;
-               case '|':
-                       done_word(dest, ctx);
-                       if (next=='|') {
-                               b_getch(input);
-                               done_pipe(ctx,PIPE_OR);
-                       } else {
-                               /* we could pick up a file descriptor choice here
-                                * with redirect_opt_num(), but bash doesn't do it.
-                                * "echo foo 2| cat" yields "foo 2". */
-#ifndef __U_BOOT__
-                               done_command(ctx);
-#else
-                               syntax_err();
-                               return 1;
-#endif
-                       }
-                       break;
-#ifndef __U_BOOT__
-               case '(':
-               case '{':
-                       if (parse_group(dest, ctx, input, ch)!=0) return 1;
-                       break;
-               case ')':
-               case '}':
-                       syntax();   /* Proper use of this character caught by end_trigger */
-                       return 1;
-                       break;
-#endif
-               case SUBSTED_VAR_SYMBOL:
-                       dest->nonnull = 1;
-                       while (ch = b_getch(input), ch != EOF &&
-                           ch != SUBSTED_VAR_SYMBOL) {
-                               debug_printf("subst, pass=%d\n", ch);
-                               if (input->__promptme == 0)
-                                       return 1;
-                               b_addchr(dest, ch);
-                       }
-                       debug_printf("subst, term=%d\n", ch);
-                       if (ch == EOF) {
-                               syntax();
-                               return 1;
-                       }
-                       break;
-               default:
-                       syntax();   /* this is really an internal logic error */
-                       return 1;
-                       }
-               }
-       }
-       /* complain if quote?  No, maybe we just finished a command substitution
-        * that was quoted.  Example:
-        * $ echo "`cat foo` plus more"
-        * and we just got the EOF generated by the subshell that ran "cat foo"
-        * The only real complaint is if we got an EOF when end_trigger != '\0',
-        * that is, we were really supposed to get end_trigger, and never got
-        * one before the EOF.  Can't use the standard "syntax error" return code,
-        * so that parse_stream_outer can distinguish the EOF and exit smoothly. */
-       debug_printf("leaving parse_stream (EOF)\n");
-       if (end_trigger != '\0') return -1;
-       return 0;
-}
-
-static void mapset(const unsigned char *set, int code)
-{
-       const unsigned char *s;
-       for (s=set; *s; s++) map[*s] = code;
-}
-
-static void update_ifs_map(void)
-{
-       /* char *ifs and char map[256] are both globals. */
-       ifs = (uchar *)getenv("IFS");
-       if (ifs == NULL) ifs=(uchar *)" \t\n";
-       /* Precompute a list of 'flow through' behavior so it can be treated
-        * quickly up front.  Computation is necessary because of IFS.
-        * Special case handling of IFS == " \t\n" is not implemented.
-        * The map[] array only really needs two bits each, and on most machines
-        * that would be faster because of the reduced L1 cache footprint.
-        */
-       memset(map,0,sizeof(map)); /* most characters flow through always */
-#ifndef __U_BOOT__
-       mapset((uchar *)"\\$'\"`", 3);      /* never flow through */
-       mapset((uchar *)"<>;&|(){}#", 1);   /* flow through if quoted */
-#else
-       {
-               uchar subst[2] = {SUBSTED_VAR_SYMBOL, 0};
-               mapset(subst, 3);       /* never flow through */
-       }
-       mapset((uchar *)"\\$'\"", 3);       /* never flow through */
-       mapset((uchar *)";&|#", 1);         /* flow through if quoted */
-#endif
-       mapset(ifs, 2);            /* also flow through if quoted */
-}
-
-/* most recursion does not come through here, the exeception is
- * from builtin_source() */
-static int parse_stream_outer(struct in_str *inp, int flag)
-{
-
-       struct p_context ctx;
-       o_string temp=NULL_O_STRING;
-       int rcode;
-#ifdef __U_BOOT__
-       int code = 0;
-#endif
-       do {
-               ctx.type = flag;
-               initialize_context(&ctx);
-               update_ifs_map();
-               if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) mapset((uchar *)";$&|", 0);
-               inp->promptmode=1;
-               rcode = parse_stream(&temp, &ctx, inp, '\n');
-#ifdef __U_BOOT__
-               if (rcode == 1) flag_repeat = 0;
-#endif
-               if (rcode != 1 && ctx.old_flag != 0) {
-                       syntax();
-#ifdef __U_BOOT__
-                       flag_repeat = 0;
-#endif
-               }
-               if (rcode != 1 && ctx.old_flag == 0) {
-                       done_word(&temp, &ctx);
-                       done_pipe(&ctx,PIPE_SEQ);
-#ifndef __U_BOOT__
-                       run_list(ctx.list_head);
-#else
-                       code = run_list(ctx.list_head);
-                       if (code == -2) {       /* exit */
-                               b_free(&temp);
-                               code = 0;
-                               /* XXX hackish way to not allow exit from main loop */
-                               if (inp->peek == file_peek) {
-                                       printf("exit not allowed from main input shell.\n");
-                                       continue;
-                               }
-                               break;
-                       }
-                       if (code == -1)
-                           flag_repeat = 0;
-#endif
-               } else {
-                       if (ctx.old_flag != 0) {
-                               free(ctx.stack);
-                               b_reset(&temp);
-                       }
-#ifdef __U_BOOT__
-                       if (inp->__promptme == 0) printf("<INTERRUPT>\n");
-                       inp->__promptme = 1;
-#endif
-                       temp.nonnull = 0;
-                       temp.quote = 0;
-                       inp->p = NULL;
-                       free_pipe_list(ctx.list_head,0);
-               }
-               b_free(&temp);
-       } while (rcode != -1 && !(flag & FLAG_EXIT_FROM_LOOP));   /* loop on syntax errors, return on EOF */
-#ifndef __U_BOOT__
-       return 0;
-#else
-       return (code != 0) ? 1 : 0;
-#endif /* __U_BOOT__ */
-}
-
-#ifndef __U_BOOT__
-static int parse_string_outer(const char *s, int flag)
-#else
-int parse_string_outer(const char *s, int flag)
-#endif /* __U_BOOT__ */
-{
-       struct in_str input;
-#ifdef __U_BOOT__
-       char *p = NULL;
-       int rcode;
-       if ( !s || !*s)
-               return 1;
-       if (!(p = strchr(s, '\n')) || *++p) {
-               p = xmalloc(strlen(s) + 2);
-               strcpy(p, s);
-               strcat(p, "\n");
-               setup_string_in_str(&input, p);
-               rcode = parse_stream_outer(&input, flag);
-               free(p);
-               return rcode;
-       } else {
-#endif
-       setup_string_in_str(&input, s);
-       return parse_stream_outer(&input, flag);
-#ifdef __U_BOOT__
-       }
-#endif
-}
-
-#ifndef __U_BOOT__
-static int parse_file_outer(FILE *f)
-#else
-int parse_file_outer(void)
-#endif
-{
-       int rcode;
-       struct in_str input;
-#ifndef __U_BOOT__
-       setup_file_in_str(&input, f);
-#else
-       setup_file_in_str(&input);
-#endif
-       rcode = parse_stream_outer(&input, FLAG_PARSE_SEMICOLON);
-       return rcode;
-}
-
-#ifdef __U_BOOT__
-#ifdef CONFIG_NEEDS_MANUAL_RELOC
-static void u_boot_hush_reloc(void)
-{
-       unsigned long addr;
-       struct reserved_combo *r;
-
-       for (r=reserved_list; r<reserved_list+NRES; r++) {
-               addr = (ulong) (r->literal) + gd->reloc_off;
-               r->literal = (char *)addr;
-       }
-}
-#endif
-
-int u_boot_hush_start(void)
-{
-       if (top_vars == NULL) {
-               top_vars = malloc(sizeof(struct variables));
-               top_vars->name = "HUSH_VERSION";
-               top_vars->value = "0.01";
-               top_vars->next = NULL;
-               top_vars->flg_export = 0;
-               top_vars->flg_read_only = 1;
-#ifdef CONFIG_NEEDS_MANUAL_RELOC
-               u_boot_hush_reloc();
-#endif
-       }
-       return 0;
-}
-
-static void *xmalloc(size_t size)
-{
-       void *p = NULL;
-
-       if (!(p = malloc(size))) {
-           printf("ERROR : memory not allocated\n");
-           for(;;);
-       }
-       return p;
-}
-
-static void *xrealloc(void *ptr, size_t size)
-{
-       void *p = NULL;
-
-       if (!(p = realloc(ptr, size))) {
-           printf("ERROR : memory not allocated\n");
-           for(;;);
-       }
-       return p;
-}
-#endif /* __U_BOOT__ */
-
-#ifndef __U_BOOT__
-/* Make sure we have a controlling tty.  If we get started under a job
- * aware app (like bash for example), make sure we are now in charge so
- * we don't fight over who gets the foreground */
-static void setup_job_control(void)
-{
-       static pid_t shell_pgrp;
-       /* Loop until we are in the foreground.  */
-       while (tcgetpgrp (shell_terminal) != (shell_pgrp = getpgrp ()))
-               kill (- shell_pgrp, SIGTTIN);
-
-       /* Ignore interactive and job-control signals.  */
-       signal(SIGINT, SIG_IGN);
-       signal(SIGQUIT, SIG_IGN);
-       signal(SIGTERM, SIG_IGN);
-       signal(SIGTSTP, SIG_IGN);
-       signal(SIGTTIN, SIG_IGN);
-       signal(SIGTTOU, SIG_IGN);
-       signal(SIGCHLD, SIG_IGN);
-
-       /* Put ourselves in our own process group.  */
-       setsid();
-       shell_pgrp = getpid ();
-       setpgid (shell_pgrp, shell_pgrp);
-
-       /* Grab control of the terminal.  */
-       tcsetpgrp(shell_terminal, shell_pgrp);
-}
-
-int hush_main(int argc, char * const *argv)
-{
-       int opt;
-       FILE *input;
-       char **e = environ;
-
-       /* XXX what should these be while sourcing /etc/profile? */
-       global_argc = argc;
-       global_argv = argv;
-
-       /* (re?) initialize globals.  Sometimes hush_main() ends up calling
-        * hush_main(), therefore we cannot rely on the BSS to zero out this
-        * stuff.  Reset these to 0 every time. */
-       ifs = NULL;
-       /* map[] is taken care of with call to update_ifs_map() */
-       fake_mode = 0;
-       interactive = 0;
-       close_me_head = NULL;
-       last_bg_pid = 0;
-       job_list = NULL;
-       last_jobid = 0;
-
-       /* Initialize some more globals to non-zero values */
-       set_cwd();
-#ifdef CONFIG_FEATURE_COMMAND_EDITING
-       cmdedit_set_initial_prompt();
-#else
-       PS1 = NULL;
-#endif
-       PS2 = "> ";
-
-       /* initialize our shell local variables with the values
-        * currently living in the environment */
-       if (e) {
-               for (; *e; e++)
-                       set_local_var(*e, 2);   /* without call putenv() */
-       }
-
-       last_return_code=EXIT_SUCCESS;
-
-
-       if (argv[0] && argv[0][0] == '-') {
-               debug_printf("\nsourcing /etc/profile\n");
-               if ((input = fopen("/etc/profile", "r")) != NULL) {
-                       mark_open(fileno(input));
-                       parse_file_outer(input);
-                       mark_closed(fileno(input));
-                       fclose(input);
-               }
-       }
-       input=stdin;
-
-       while ((opt = getopt(argc, argv, "c:xif")) > 0) {
-               switch (opt) {
-                       case 'c':
-                               {
-                                       global_argv = argv+optind;
-                                       global_argc = argc-optind;
-                                       opt = parse_string_outer(optarg, FLAG_PARSE_SEMICOLON);
-                                       goto final_return;
-                               }
-                               break;
-                       case 'i':
-                               interactive++;
-                               break;
-                       case 'f':
-                               fake_mode++;
-                               break;
-                       default:
-#ifndef BB_VER
-                               fprintf(stderr, "Usage: sh [FILE]...\n"
-                                               "   or: sh -c command [args]...\n\n");
-                               exit(EXIT_FAILURE);
-#else
-                               show_usage();
-#endif
-               }
-       }
-       /* A shell is interactive if the `-i' flag was given, or if all of
-        * the following conditions are met:
-        *        no -c command
-        *    no arguments remaining or the -s flag given
-        *    standard input is a terminal
-        *    standard output is a terminal
-        *    Refer to Posix.2, the description of the `sh' utility. */
-       if (argv[optind]==NULL && input==stdin &&
-                       isatty(fileno(stdin)) && isatty(fileno(stdout))) {
-               interactive++;
-       }
-
-       debug_printf("\ninteractive=%d\n", interactive);
-       if (interactive) {
-               /* Looks like they want an interactive shell */
-#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
-               printf( "\n\n" BB_BANNER " hush - the humble shell v0.01 (testing)\n");
-               printf( "Enter 'help' for a list of built-in commands.\n\n");
-#endif
-               setup_job_control();
-       }
-
-       if (argv[optind]==NULL) {
-               opt=parse_file_outer(stdin);
-               goto final_return;
-       }
-
-       debug_printf("\nrunning script '%s'\n", argv[optind]);
-       global_argv = argv+optind;
-       global_argc = argc-optind;
-       input = xfopen(argv[optind], "r");
-       opt = parse_file_outer(input);
-
-#ifdef CONFIG_FEATURE_CLEAN_UP
-       fclose(input);
-       if (cwd && cwd != unknown)
-               free((char*)cwd);
-       {
-               struct variables *cur, *tmp;
-               for(cur = top_vars; cur; cur = tmp) {
-                       tmp = cur->next;
-                       if (!cur->flg_read_only) {
-                               free(cur->name);
-                               free(cur->value);
-                               free(cur);
-                       }
-               }
-       }
-#endif
-
-final_return:
-       return(opt?opt:last_return_code);
-}
-#endif
-
-static char *insert_var_value(char *inp)
-{
-       return insert_var_value_sub(inp, 0);
-}
-
-static char *insert_var_value_sub(char *inp, int tag_subst)
-{
-       int res_str_len = 0;
-       int len;
-       int done = 0;
-       char *p, *p1, *res_str = NULL;
-
-       while ((p = strchr(inp, SPECIAL_VAR_SYMBOL))) {
-               /* check the beginning of the string for normal charachters */
-               if (p != inp) {
-                       /* copy any charachters to the result string */
-                       len = p - inp;
-                       res_str = xrealloc(res_str, (res_str_len + len));
-                       strncpy((res_str + res_str_len), inp, len);
-                       res_str_len += len;
-               }
-               inp = ++p;
-               /* find the ending marker */
-               p = strchr(inp, SPECIAL_VAR_SYMBOL);
-               *p = '\0';
-               /* look up the value to substitute */
-               if ((p1 = lookup_param(inp))) {
-                       if (tag_subst)
-                               len = res_str_len + strlen(p1) + 2;
-                       else
-                               len = res_str_len + strlen(p1);
-                       res_str = xrealloc(res_str, (1 + len));
-                       if (tag_subst) {
-                               /*
-                                * copy the variable value to the result
-                                * string
-                                */
-                               strcpy((res_str + res_str_len + 1), p1);
-
-                               /*
-                                * mark the replaced text to be accepted as
-                                * is
-                                */
-                               res_str[res_str_len] = SUBSTED_VAR_SYMBOL;
-                               res_str[res_str_len + 1 + strlen(p1)] =
-                                       SUBSTED_VAR_SYMBOL;
-                       } else
-                               /*
-                                * copy the variable value to the result
-                                * string
-                                */
-                               strcpy((res_str + res_str_len), p1);
-
-                       res_str_len = len;
-               }
-               *p = SPECIAL_VAR_SYMBOL;
-               inp = ++p;
-               done = 1;
-       }
-       if (done) {
-               res_str = xrealloc(res_str, (1 + res_str_len + strlen(inp)));
-               strcpy((res_str + res_str_len), inp);
-               while ((p = strchr(res_str, '\n'))) {
-                       *p = ' ';
-               }
-       }
-       return (res_str == NULL) ? inp : res_str;
-}
-
-static char **make_list_in(char **inp, char *name)
-{
-       int len, i;
-       int name_len = strlen(name);
-       int n = 0;
-       char **list;
-       char *p1, *p2, *p3;
-
-       /* create list of variable values */
-       list = xmalloc(sizeof(*list));
-       for (i = 0; inp[i]; i++) {
-               p3 = insert_var_value(inp[i]);
-               p1 = p3;
-               while (*p1) {
-                       if ((*p1 == ' ')) {
-                               p1++;
-                               continue;
-                       }
-                       if ((p2 = strchr(p1, ' '))) {
-                               len = p2 - p1;
-                       } else {
-                               len = strlen(p1);
-                               p2 = p1 + len;
-                       }
-                       /* we use n + 2 in realloc for list,because we add
-                        * new element and then we will add NULL element */
-                       list = xrealloc(list, sizeof(*list) * (n + 2));
-                       list[n] = xmalloc(2 + name_len + len);
-                       strcpy(list[n], name);
-                       strcat(list[n], "=");
-                       strncat(list[n], p1, len);
-                       list[n++][name_len + len + 1] = '\0';
-                       p1 = p2;
-               }
-               if (p3 != inp[i]) free(p3);
-       }
-       list[n] = NULL;
-       return list;
-}
-
-/*
- * Make new string for parser
- * inp     - array of argument strings to flatten
- * nonnull - indicates argument was quoted when originally parsed
- */
-static char *make_string(char **inp, int *nonnull)
-{
-       char *p;
-       char *str = NULL;
-       int n;
-       int len = 2;
-       char *noeval_str;
-       int noeval = 0;
-
-       noeval_str = get_local_var("HUSH_NO_EVAL");
-       if (noeval_str != NULL && *noeval_str != '0' && *noeval_str != '\0')
-               noeval = 1;
-       for (n = 0; inp[n]; n++) {
-               p = insert_var_value_sub(inp[n], noeval);
-               str = xrealloc(str, (len + strlen(p) + (2 * nonnull[n])));
-               if (n) {
-                       strcat(str, " ");
-               } else {
-                       *str = '\0';
-               }
-               if (nonnull[n])
-                       strcat(str, "'");
-               strcat(str, p);
-               if (nonnull[n])
-                       strcat(str, "'");
-               len = strlen(str) + 3;
-               if (p != inp[n]) free(p);
-       }
-       len = strlen(str);
-       *(str + len) = '\n';
-       *(str + len + 1) = '\0';
-       return str;
-}
-
-#ifdef __U_BOOT__
-static int do_showvar(cmd_tbl_t *cmdtp, int flag, int argc,
-                     char * const argv[])
-{
-       int i, k;
-       int rcode = 0;
-       struct variables *cur;
-
-       if (argc == 1) {                /* Print all env variables      */
-               for (cur = top_vars; cur; cur = cur->next) {
-                       printf ("%s=%s\n", cur->name, cur->value);
-                       if (ctrlc ()) {
-                               puts ("\n ** Abort\n");
-                               return 1;
-                       }
-               }
-               return 0;
-       }
-       for (i = 1; i < argc; ++i) {    /* print single env variables   */
-               char *name = argv[i];
-
-               k = -1;
-               for (cur = top_vars; cur; cur = cur->next) {
-                       if(strcmp (cur->name, name) == 0) {
-                               k = 0;
-                               printf ("%s=%s\n", cur->name, cur->value);
-                       }
-                       if (ctrlc ()) {
-                               puts ("\n ** Abort\n");
-                               return 1;
-                       }
-               }
-               if (k < 0) {
-                       printf ("## Error: \"%s\" not defined\n", name);
-                       rcode ++;
-               }
-       }
-       return rcode;
-}
-
-U_BOOT_CMD(
-       showvar, CONFIG_SYS_MAXARGS, 1, do_showvar,
-       "print local hushshell variables",
-       "\n    - print values of all hushshell variables\n"
-       "showvar name ...\n"
-       "    - print value of hushshell variable 'name'"
-);
-
-#endif
-/****************************************************************************/
index 9bee7bdc6b0e9b8deeb21b15647ff48a8e88156d..a80fb7c3441cda6ef3318dad72cf000126502cdf 100644 (file)
@@ -14,7 +14,7 @@
 #include <common.h>
 #include <command.h>
 #include <fdtdec.h>
-#include <hush.h>
+#include <cli_hush.h>
 #include <malloc.h>
 #include <menu.h>
 #include <post.h>
diff --git a/include/cli_hush.h b/include/cli_hush.h
new file mode 100644 (file)
index 0000000..4951eef
--- /dev/null
@@ -0,0 +1,26 @@
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef _CLI_HUSH_H_
+#define _CLI_HUSH_H_
+
+#define FLAG_EXIT_FROM_LOOP 1
+#define FLAG_PARSE_SEMICOLON (1 << 1)    /* symbol ';' is special for parser */
+#define FLAG_REPARSING       (1 << 2)    /* >=2nd pass */
+
+extern int u_boot_hush_start(void);
+extern int parse_string_outer(const char *, int);
+extern int parse_file_outer(void);
+
+int set_local_var(const char *s, int flg_export);
+void unset_local_var(const char *name);
+char *get_local_var(const char *s);
+
+#if defined(CONFIG_HUSH_INIT_VAR)
+extern int hush_init_var (void);
+#endif
+#endif
diff --git a/include/hush.h b/include/hush.h
deleted file mode 100644 (file)
index 595303a..0000000
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * (C) Copyright 2001
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier:    GPL-2.0+
- */
-
-#ifndef _HUSH_H_
-#define _HUSH_H_
-
-#define FLAG_EXIT_FROM_LOOP 1
-#define FLAG_PARSE_SEMICOLON (1 << 1)    /* symbol ';' is special for parser */
-#define FLAG_REPARSING       (1 << 2)    /* >=2nd pass */
-
-extern int u_boot_hush_start(void);
-extern int parse_string_outer(const char *, int);
-extern int parse_file_outer(void);
-
-int set_local_var(const char *s, int flg_export);
-void unset_local_var(const char *name);
-char *get_local_var(const char *s);
-
-#if defined(CONFIG_HUSH_INIT_VAR)
-extern int hush_init_var (void);
-#endif
-#endif