2 * (C) Copyright 2000-2013
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
6 * Andreas Heppel <aheppel@sysgo.de>
8 * Copyright 2011 Freescale Semiconductor, Inc.
10 * SPDX-License-Identifier: GPL-2.0+
14 * Support for persistent environment data
16 * The "environment" is stored on external storage as a list of '\0'
17 * terminated "name=value" strings. The end of the list is marked by
18 * a double '\0'. The environment is preceded by a 32 bit CRC over
19 * the data part and, in case of redundant environment, a byte of
22 * This linearized representation will also be used before
23 * relocation, i. e. as long as we don't have a full C runtime
24 * environment. After that, we use a hash table.
31 #include <environment.h>
37 #include <linux/stddef.h>
38 #include <asm/byteorder.h>
41 DECLARE_GLOBAL_DATA_PTR;
43 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
44 !defined(CONFIG_ENV_IS_IN_FLASH) && \
45 !defined(CONFIG_ENV_IS_IN_MMC) && \
46 !defined(CONFIG_ENV_IS_IN_FAT) && \
47 !defined(CONFIG_ENV_IS_IN_EXT4) && \
48 !defined(CONFIG_ENV_IS_IN_NAND) && \
49 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
50 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
51 !defined(CONFIG_ENV_IS_IN_SATA) && \
52 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
53 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
54 !defined(CONFIG_ENV_IS_IN_UBI) && \
55 !defined(CONFIG_ENV_IS_NOWHERE)
56 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
57 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
61 * Maximum expected input data size for import command
63 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
66 * This variable is incremented on each do_env_set(), so it can
67 * be used via get_env_id() as an indication, if the environment
68 * has changed or not. So it is possible to reread an environment
69 * variable only if the environment was changed ... done so for
70 * example in NetInitLoop()
72 static int env_id = 1;
79 #ifndef CONFIG_SPL_BUILD
81 * Command interface: print one or all environment variables
83 * Returns 0 in case of error, or length of printed string
85 static int env_print(char *name, int flag)
90 if (name) { /* print a single name */
95 hsearch_r(e, FIND, &ep, &env_htab, flag);
98 len = printf("%s=%s\n", ep->key, ep->data);
102 /* print whole list */
103 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
111 /* should never happen */
112 printf("## Error: cannot export environment\n");
116 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
121 int env_flag = H_HIDE_DOT;
123 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
126 env_flag &= ~H_HIDE_DOT;
130 /* print all env vars */
131 rcode = env_print(NULL, env_flag);
134 printf("\nEnvironment size: %d/%ld bytes\n",
135 rcode, (ulong)ENV_SIZE);
139 /* print selected env vars */
140 env_flag &= ~H_HIDE_DOT;
141 for (i = 1; i < argc; ++i) {
142 int rc = env_print(argv[i], env_flag);
144 printf("## Error: \"%s\" not defined\n", argv[i]);
152 #ifdef CONFIG_CMD_GREPENV
153 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
154 int argc, char * const argv[])
157 int len, grep_how, grep_what;
160 return CMD_RET_USAGE;
162 grep_how = H_MATCH_SUBSTR; /* default: substring search */
163 grep_what = H_MATCH_BOTH; /* default: grep names and values */
165 while (--argc > 0 && **++argv == '-') {
170 case 'e': /* use regex matching */
171 grep_how = H_MATCH_REGEX;
174 case 'n': /* grep for name */
175 grep_what = H_MATCH_KEY;
177 case 'v': /* grep for value */
178 grep_what = H_MATCH_DATA;
180 case 'b': /* grep for both */
181 grep_what = H_MATCH_BOTH;
186 return CMD_RET_USAGE;
192 len = hexport_r(&env_htab, '\n',
193 flag | grep_what | grep_how,
194 &res, 0, argc, argv);
207 #endif /* CONFIG_SPL_BUILD */
210 * Set a new environment variable,
211 * or replace or delete an existing one.
213 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
216 char *name, *value, *s;
219 debug("Initial value for argc=%d\n", argc);
220 while (argc > 1 && **(argv + 1) == '-') {
226 case 'f': /* force */
230 return CMD_RET_USAGE;
234 debug("Final value for argc=%d\n", argc);
237 if (strchr(name, '=')) {
238 printf("## Error: illegal character '='"
239 "in variable name \"%s\"\n", name);
246 if (argc < 3 || argv[2] == NULL) {
247 int rc = hdelete_r(name, &env_htab, env_flag);
252 * Insert / replace new value
254 for (i = 2, len = 0; i < argc; ++i)
255 len += strlen(argv[i]) + 1;
259 printf("## Can't malloc %d bytes\n", len);
262 for (i = 2, s = value; i < argc; ++i) {
265 while ((*s++ = *v++) != '\0')
274 hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
277 printf("## Error inserting \"%s\" variable, errno=%d\n",
285 int env_set(const char *varname, const char *varvalue)
287 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
289 /* before import into hashtable */
290 if (!(gd->flags & GD_FLG_ENV_READY))
293 if (varvalue == NULL || varvalue[0] == '\0')
294 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
296 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
300 * Set an environment variable to an integer value
302 * @param varname Environment variable to set
303 * @param value Value to set it to
304 * @return 0 if ok, 1 on error
306 int env_set_ulong(const char *varname, ulong value)
308 /* TODO: this should be unsigned */
309 char *str = simple_itoa(value);
311 return env_set(varname, str);
315 * Set an environment variable to an value in hex
317 * @param varname Environment variable to set
318 * @param value Value to set it to
319 * @return 0 if ok, 1 on error
321 int env_set_hex(const char *varname, ulong value)
325 sprintf(str, "%lx", value);
326 return env_set(varname, str);
329 ulong env_get_hex(const char *varname, ulong default_val)
335 s = env_get(varname);
337 value = simple_strtoul(s, &endp, 16);
344 #ifndef CONFIG_SPL_BUILD
345 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
348 return CMD_RET_USAGE;
350 return _do_env_set(flag, argc, argv, H_INTERACTIVE);
354 * Prompt for environment variable
356 #if defined(CONFIG_CMD_ASKENV)
357 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
359 char message[CONFIG_SYS_CBSIZE];
360 int i, len, pos, size;
364 local_args[0] = argv[0];
365 local_args[1] = argv[1];
366 local_args[2] = NULL;
367 local_args[3] = NULL;
372 * env_ask envname [message1 ...] [size]
375 return CMD_RET_USAGE;
378 * We test the last argument if it can be converted
379 * into a decimal number. If yes, we assume it's
380 * the size. Otherwise we echo it as part of the
383 i = simple_strtoul(argv[argc - 1], &endptr, 10);
384 if (*endptr != '\0') { /* no size */
385 size = CONFIG_SYS_CBSIZE - 1;
386 } else { /* size given */
392 sprintf(message, "Please enter '%s': ", argv[1]);
394 /* env_ask envname message1 ... messagen [size] */
395 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
397 message[pos++] = ' ';
399 strncpy(message + pos, argv[i], sizeof(message) - pos);
400 pos += strlen(argv[i]);
402 if (pos < sizeof(message) - 1) {
403 message[pos++] = ' ';
406 message[CONFIG_SYS_CBSIZE - 1] = '\0';
409 if (size >= CONFIG_SYS_CBSIZE)
410 size = CONFIG_SYS_CBSIZE - 1;
415 /* prompt for input */
416 len = cli_readline(message);
419 console_buffer[size] = '\0';
422 if (console_buffer[0] != '\0') {
423 local_args[2] = console_buffer;
427 /* Continue calling setenv code */
428 return _do_env_set(flag, len, local_args, H_INTERACTIVE);
432 #if defined(CONFIG_CMD_ENV_CALLBACK)
433 static int print_static_binding(const char *var_name, const char *callback_name,
436 printf("\t%-20s %-20s\n", var_name, callback_name);
441 static int print_active_callback(ENTRY *entry)
443 struct env_clbk_tbl *clbkp;
447 if (entry->callback == NULL)
450 /* look up the callback in the linker-list */
451 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
452 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
455 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
456 if (entry->callback == clbkp->callback + gd->reloc_off)
458 if (entry->callback == clbkp->callback)
463 if (i == num_callbacks)
464 /* this should probably never happen, but just in case... */
465 printf("\t%-20s %p\n", entry->key, entry->callback);
467 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
473 * Print the callbacks available and what they are bound to
475 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
477 struct env_clbk_tbl *clbkp;
481 /* Print the available callbacks */
482 puts("Available callbacks:\n");
483 puts("\tCallback Name\n");
484 puts("\t-------------\n");
485 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
486 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
489 printf("\t%s\n", clbkp->name);
492 /* Print the static bindings that may exist */
493 puts("Static callback bindings:\n");
494 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
495 printf("\t%-20s %-20s\n", "-------------", "-------------");
496 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
499 /* walk through each variable and print the callback if it has one */
500 puts("Active callback bindings:\n");
501 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
502 printf("\t%-20s %-20s\n", "-------------", "-------------");
503 hwalk_r(&env_htab, print_active_callback);
508 #if defined(CONFIG_CMD_ENV_FLAGS)
509 static int print_static_flags(const char *var_name, const char *flags,
512 enum env_flags_vartype type = env_flags_parse_vartype(flags);
513 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
515 printf("\t%-20s %-20s %-20s\n", var_name,
516 env_flags_get_vartype_name(type),
517 env_flags_get_varaccess_name(access));
522 static int print_active_flags(ENTRY *entry)
524 enum env_flags_vartype type;
525 enum env_flags_varaccess access;
527 if (entry->flags == 0)
530 type = (enum env_flags_vartype)
531 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
532 access = env_flags_parse_varaccess_from_binflags(entry->flags);
533 printf("\t%-20s %-20s %-20s\n", entry->key,
534 env_flags_get_vartype_name(type),
535 env_flags_get_varaccess_name(access));
541 * Print the flags available and what variables have flags
543 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
545 /* Print the available variable types */
546 printf("Available variable type flags (position %d):\n",
547 ENV_FLAGS_VARTYPE_LOC);
548 puts("\tFlag\tVariable Type Name\n");
549 puts("\t----\t------------------\n");
550 env_flags_print_vartypes();
553 /* Print the available variable access types */
554 printf("Available variable access flags (position %d):\n",
555 ENV_FLAGS_VARACCESS_LOC);
556 puts("\tFlag\tVariable Access Name\n");
557 puts("\t----\t--------------------\n");
558 env_flags_print_varaccess();
561 /* Print the static flags that may exist */
562 puts("Static flags:\n");
563 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
565 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
567 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
570 /* walk through each variable and print the flags if non-default */
571 puts("Active flags:\n");
572 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
574 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
576 hwalk_r(&env_htab, print_active_flags);
582 * Interactively edit an environment variable
584 #if defined(CONFIG_CMD_EDITENV)
585 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
588 char buffer[CONFIG_SYS_CBSIZE];
592 return CMD_RET_USAGE;
594 /* before import into hashtable */
595 if (!(gd->flags & GD_FLG_ENV_READY))
598 /* Set read buffer to initial value or empty sting */
599 init_val = env_get(argv[1]);
601 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
605 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
608 if (buffer[0] == '\0') {
609 const char * const _argv[3] = { "setenv", argv[1], NULL };
611 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
613 const char * const _argv[4] = { "setenv", argv[1], buffer,
616 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
619 #endif /* CONFIG_CMD_EDITENV */
620 #endif /* CONFIG_SPL_BUILD */
623 * Look up variable from environment,
624 * return address of storage for that variable,
625 * or NULL if not found
627 char *env_get(const char *name)
629 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
636 hsearch_r(e, FIND, &ep, &env_htab, 0);
638 return ep ? ep->data : NULL;
641 /* restricted capabilities before import */
642 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
643 return (char *)(gd->env_buf);
649 * Look up variable from environment for restricted C runtime env.
651 int env_get_f(const char *name, char *buf, unsigned len)
655 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
658 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
659 if (nxt >= CONFIG_ENV_SIZE)
663 val = envmatch((uchar *)name, i);
667 /* found; copy out */
668 for (n = 0; n < len; ++n, ++buf) {
669 *buf = env_get_char(val++);
677 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
687 * Decode the integer value of an environment variable and return it.
689 * @param name Name of environemnt variable
690 * @param base Number base to use (normally 10, or 16 for hex)
691 * @param default_val Default value to return if the variable is not
693 * @return the decoded value, or default_val if not found
695 ulong env_get_ulong(const char *name, int base, ulong default_val)
698 * We can use env_get() here, even before relocation, since the
699 * environment variable value is an integer and thus short.
701 const char *str = env_get(name);
703 return str ? simple_strtoul(str, NULL, base) : default_val;
706 #ifndef CONFIG_SPL_BUILD
707 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
708 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
711 return env_save() ? 1 : 0;
715 saveenv, 1, 0, do_env_save,
716 "save environment variables to persistent storage",
720 #endif /* CONFIG_SPL_BUILD */
724 * Match a name / name=value pair
726 * s1 is either a simple 'name', or a 'name=value' pair.
727 * i2 is the environment index for a 'name2=value2' pair.
728 * If the names match, return the index for the value2, else -1.
730 int envmatch(uchar *s1, int i2)
735 while (*s1 == env_get_char(i2++))
739 if (*s1 == '\0' && env_get_char(i2-1) == '=')
745 #ifndef CONFIG_SPL_BUILD
746 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
747 int argc, char * const argv[])
749 int all = 0, flag = 0;
751 debug("Initial value for argc=%d\n", argc);
752 while (--argc > 0 && **++argv == '-') {
757 case 'a': /* default all */
760 case 'f': /* force */
764 return cmd_usage(cmdtp);
768 debug("Final value for argc=%d\n", argc);
769 if (all && (argc == 0)) {
770 /* Reset the whole environment */
771 set_default_env("## Resetting to default environment\n");
774 if (!all && (argc > 0)) {
775 /* Reset individual variables */
776 set_default_vars(argc, argv);
780 return cmd_usage(cmdtp);
783 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
784 int argc, char * const argv[])
786 int env_flag = H_INTERACTIVE;
789 debug("Initial value for argc=%d\n", argc);
790 while (argc > 1 && **(argv + 1) == '-') {
796 case 'f': /* force */
800 return CMD_RET_USAGE;
804 debug("Final value for argc=%d\n", argc);
809 char *name = *++argv;
811 if (!hdelete_r(name, &env_htab, env_flag))
818 #ifdef CONFIG_CMD_EXPORTENV
820 * env export [-t | -b | -c] [-s size] addr [var ...]
821 * -t: export as text format; if size is given, data will be
822 * padded with '\0' bytes; if not, one terminating '\0'
823 * will be added (which is included in the "filesize"
824 * setting so you can for exmple copy this to flash and
825 * keep the termination).
826 * -b: export as binary format (name=value pairs separated by
827 * '\0', list end marked by double "\0\0")
828 * -c: export as checksum protected environment format as
829 * used for example by "saveenv" command
831 * size of output buffer
832 * addr: memory address where environment gets stored
833 * var... List of variable names that get included into the
834 * export. Without arguments, the whole environment gets
837 * With "-c" and size is NOT given, then the export command will
838 * format the data as currently used for the persistent storage,
839 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
840 * prepend a valid CRC32 checksum and, in case of redundant
841 * environment, a "current" redundancy flag. If size is given, this
842 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
843 * checksum and redundancy flag will be inserted.
845 * With "-b" and "-t", always only the real data (including a
846 * terminating '\0' byte) will be written; here the optional size
847 * argument will be used to make sure not to overflow the user
848 * provided buffer; the command will abort if the size is not
849 * sufficient. Any remaining space will be '\0' padded.
851 * On successful return, the variable "filesize" will be set.
852 * Note that filesize includes the trailing/terminating '\0' byte(s).
854 * Usage scenario: create a text snapshot/backup of the current settings:
856 * => env export -t 100000
857 * => era ${backup_addr} +${filesize}
858 * => cp.b 100000 ${backup_addr} ${filesize}
860 * Re-import this snapshot, deleting all other settings:
862 * => env import -d -t ${backup_addr}
864 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
865 int argc, char * const argv[])
869 char *ptr, *cmd, *res;
879 while (--argc > 0 && **++argv == '-') {
883 case 'b': /* raw binary format */
888 case 'c': /* external checksum format */
894 case 's': /* size given */
896 return cmd_usage(cmdtp);
897 size = simple_strtoul(*++argv, NULL, 16);
899 case 't': /* text format */
905 return CMD_RET_USAGE;
912 return CMD_RET_USAGE;
914 addr = simple_strtoul(argv[0], NULL, 16);
915 ptr = map_sysmem(addr, size);
918 memset(ptr, '\0', size);
923 if (sep) { /* export as text file */
924 len = hexport_r(&env_htab, sep,
925 H_MATCH_KEY | H_MATCH_IDENT,
926 &ptr, size, argc, argv);
928 pr_err("Cannot export environment: errno = %d\n", errno);
931 sprintf(buf, "%zX", (size_t)len);
932 env_set("filesize", buf);
939 if (chk) /* export as checksum protected block */
940 res = (char *)envp->data;
941 else /* export as raw binary data */
944 len = hexport_r(&env_htab, '\0',
945 H_MATCH_KEY | H_MATCH_IDENT,
946 &res, ENV_SIZE, argc, argv);
948 pr_err("Cannot export environment: errno = %d\n", errno);
953 envp->crc = crc32(0, envp->data, ENV_SIZE);
954 #ifdef CONFIG_ENV_ADDR_REDUND
955 envp->flags = ACTIVE_FLAG;
958 env_set_hex("filesize", len + offsetof(env_t, data));
963 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
968 #ifdef CONFIG_CMD_IMPORTENV
970 * env import [-d] [-t [-r] | -b | -c] addr [size]
971 * -d: delete existing environment before importing;
972 * otherwise overwrite / append to existing definitions
973 * -t: assume text format; either "size" must be given or the
974 * text data must be '\0' terminated
975 * -r: handle CRLF like LF, that means exported variables with
976 * a content which ends with \r won't get imported. Used
977 * to import text files created with editors which are using CRLF
978 * for line endings. Only effective in addition to -t.
979 * -b: assume binary format ('\0' separated, "\0\0" terminated)
980 * -c: assume checksum protected environment format
981 * addr: memory address to read from
982 * size: length of input data; if missing, proper '\0'
983 * termination is mandatory
985 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
986 int argc, char * const argv[])
999 while (--argc > 0 && **++argv == '-') {
1003 case 'b': /* raw binary format */
1008 case 'c': /* external checksum format */
1014 case 't': /* text format */
1019 case 'r': /* handle CRLF like LF */
1026 return CMD_RET_USAGE;
1032 return CMD_RET_USAGE;
1035 printf("## Warning: defaulting to text format\n");
1037 if (sep != '\n' && crlf_is_lf )
1040 addr = simple_strtoul(argv[0], NULL, 16);
1041 ptr = map_sysmem(addr, 0);
1044 size = simple_strtoul(argv[1], NULL, 16);
1045 } else if (argc == 1 && chk) {
1046 puts("## Error: external checksum format must pass size\n");
1047 return CMD_RET_FAILURE;
1053 while (size < MAX_ENV_SIZE) {
1054 if ((*s == sep) && (*(s+1) == '\0'))
1059 if (size == MAX_ENV_SIZE) {
1060 printf("## Warning: Input data exceeds %d bytes"
1061 " - truncated\n", MAX_ENV_SIZE);
1064 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1069 env_t *ep = (env_t *)ptr;
1071 size -= offsetof(env_t, data);
1072 memcpy(&crc, &ep->crc, sizeof(crc));
1074 if (crc32(0, ep->data, size) != crc) {
1075 puts("## Error: bad CRC, import failed\n");
1078 ptr = (char *)ep->data;
1081 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1082 crlf_is_lf, 0, NULL) == 0) {
1083 pr_err("Environment import failed: errno = %d\n", errno);
1086 gd->flags |= GD_FLG_ENV_READY;
1091 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1097 #if defined(CONFIG_CMD_ENV_EXISTS)
1098 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1099 char * const argv[])
1104 return CMD_RET_USAGE;
1108 hsearch_r(e, FIND, &ep, &env_htab, 0);
1110 return (ep == NULL) ? 1 : 0;
1115 * New command line interface: "env" command with subcommands
1117 static cmd_tbl_t cmd_env_sub[] = {
1118 #if defined(CONFIG_CMD_ASKENV)
1119 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1121 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1122 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1123 #if defined(CONFIG_CMD_EDITENV)
1124 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1126 #if defined(CONFIG_CMD_ENV_CALLBACK)
1127 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1129 #if defined(CONFIG_CMD_ENV_FLAGS)
1130 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1132 #if defined(CONFIG_CMD_EXPORTENV)
1133 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1135 #if defined(CONFIG_CMD_GREPENV)
1136 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1138 #if defined(CONFIG_CMD_IMPORTENV)
1139 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1141 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1142 #if defined(CONFIG_CMD_RUN)
1143 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1145 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1146 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1148 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1149 #if defined(CONFIG_CMD_ENV_EXISTS)
1150 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1154 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1155 void env_reloc(void)
1157 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1161 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1166 return CMD_RET_USAGE;
1168 /* drop initial "env" arg */
1172 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1175 return cp->cmd(cmdtp, flag, argc, argv);
1177 return CMD_RET_USAGE;
1180 #ifdef CONFIG_SYS_LONGHELP
1181 static char env_help_text[] =
1182 #if defined(CONFIG_CMD_ASKENV)
1183 "ask name [message] [size] - ask for environment variable\nenv "
1185 #if defined(CONFIG_CMD_ENV_CALLBACK)
1186 "callbacks - print callbacks and their associated variables\nenv "
1188 "default [-f] -a - [forcibly] reset default environment\n"
1189 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1190 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1191 #if defined(CONFIG_CMD_EDITENV)
1192 "env edit name - edit environment variable\n"
1194 #if defined(CONFIG_CMD_ENV_EXISTS)
1195 "env exists name - tests for existence of variable\n"
1197 #if defined(CONFIG_CMD_EXPORTENV)
1198 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1200 #if defined(CONFIG_CMD_ENV_FLAGS)
1201 "env flags - print variables that have non-default flags\n"
1203 #if defined(CONFIG_CMD_GREPENV)
1205 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1207 "env grep [-n | -v | -b] string [...] - search environment\n"
1210 #if defined(CONFIG_CMD_IMPORTENV)
1211 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1213 "env print [-a | name ...] - print environment\n"
1214 #if defined(CONFIG_CMD_RUN)
1215 "env run var [...] - run commands in an environment variable\n"
1217 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1218 "env save - save environment\n"
1220 "env set [-f] name [arg ...]\n";
1224 env, CONFIG_SYS_MAXARGS, 1, do_env,
1225 "environment handling commands", env_help_text
1229 * Old command line interface, kept for compatibility
1232 #if defined(CONFIG_CMD_EDITENV)
1233 U_BOOT_CMD_COMPLETE(
1234 editenv, 2, 0, do_env_edit,
1235 "edit environment variable",
1237 " - edit environment variable 'name'",
1242 U_BOOT_CMD_COMPLETE(
1243 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1244 "print environment variables",
1245 "[-a]\n - print [all] values of all environment variables\n"
1246 "printenv name ...\n"
1247 " - print value of environment variable 'name'",
1251 #ifdef CONFIG_CMD_GREPENV
1252 U_BOOT_CMD_COMPLETE(
1253 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1254 "search environment variables",
1256 "[-e] [-n | -v | -b] string ...\n"
1258 "[-n | -v | -b] string ...\n"
1260 " - list environment name=value pairs matching 'string'\n"
1262 " \"-e\": enable regular expressions;\n"
1264 " \"-n\": search variable names; \"-v\": search values;\n"
1265 " \"-b\": search both names and values (default)",
1270 U_BOOT_CMD_COMPLETE(
1271 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1272 "set environment variables",
1273 "[-f] name value ...\n"
1274 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1275 "setenv [-f] name\n"
1276 " - [forcibly] delete environment variable 'name'",
1280 #if defined(CONFIG_CMD_ASKENV)
1283 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1284 "get environment variables from stdin",
1285 "name [message] [size]\n"
1286 " - get environment variable 'name' from stdin (max 'size' chars)"
1290 #if defined(CONFIG_CMD_RUN)
1291 U_BOOT_CMD_COMPLETE(
1292 run, CONFIG_SYS_MAXARGS, 1, do_run,
1293 "run commands in an environment variable",
1295 " - run the commands in the environment variable(s) 'var'",
1299 #endif /* CONFIG_SPL_BUILD */