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 preceeded 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.
29 #include <environment.h>
34 #include <linux/stddef.h>
35 #include <asm/byteorder.h>
38 DECLARE_GLOBAL_DATA_PTR;
40 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
41 !defined(CONFIG_ENV_IS_IN_FLASH) && \
42 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
43 !defined(CONFIG_ENV_IS_IN_MMC) && \
44 !defined(CONFIG_ENV_IS_IN_FAT) && \
45 !defined(CONFIG_ENV_IS_IN_NAND) && \
46 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
47 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
48 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
49 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
50 !defined(CONFIG_ENV_IS_IN_UBI) && \
51 !defined(CONFIG_ENV_IS_NOWHERE)
52 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
53 SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
57 * Maximum expected input data size for import command
59 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
62 * This variable is incremented on each do_env_set(), so it can
63 * be used via get_env_id() as an indication, if the environment
64 * has changed or not. So it is possible to reread an environment
65 * variable only if the environment was changed ... done so for
66 * example in NetInitLoop()
68 static int env_id = 1;
75 #ifndef CONFIG_SPL_BUILD
77 * Command interface: print one or all environment variables
79 * Returns 0 in case of error, or length of printed string
81 static int env_print(char *name, int flag)
86 if (name) { /* print a single name */
91 hsearch_r(e, FIND, &ep, &env_htab, flag);
94 len = printf("%s=%s\n", ep->key, ep->data);
98 /* print whole list */
99 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
107 /* should never happen */
108 printf("## Error: cannot export environment\n");
112 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
117 int env_flag = H_HIDE_DOT;
119 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
122 env_flag &= ~H_HIDE_DOT;
126 /* print all env vars */
127 rcode = env_print(NULL, env_flag);
130 printf("\nEnvironment size: %d/%ld bytes\n",
131 rcode, (ulong)ENV_SIZE);
135 /* print selected env vars */
136 env_flag &= ~H_HIDE_DOT;
137 for (i = 1; i < argc; ++i) {
138 int rc = env_print(argv[i], env_flag);
140 printf("## Error: \"%s\" not defined\n", argv[i]);
148 #ifdef CONFIG_CMD_GREPENV
149 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
150 int argc, char * const argv[])
153 int len, grep_how, grep_what;
156 return CMD_RET_USAGE;
158 grep_how = H_MATCH_SUBSTR; /* default: substring search */
159 grep_what = H_MATCH_BOTH; /* default: grep names and values */
161 while (--argc > 0 && **++argv == '-') {
166 case 'e': /* use regex matching */
167 grep_how = H_MATCH_REGEX;
170 case 'n': /* grep for name */
171 grep_what = H_MATCH_KEY;
173 case 'v': /* grep for value */
174 grep_what = H_MATCH_DATA;
176 case 'b': /* grep for both */
177 grep_what = H_MATCH_BOTH;
182 return CMD_RET_USAGE;
188 len = hexport_r(&env_htab, '\n',
189 flag | grep_what | grep_how,
190 &res, 0, argc, argv);
203 #endif /* CONFIG_SPL_BUILD */
206 * Set a new environment variable,
207 * or replace or delete an existing one.
209 static int _do_env_set(int flag, int argc, char * const argv[])
212 char *name, *value, *s;
214 int env_flag = H_INTERACTIVE;
216 debug("Initial value for argc=%d\n", argc);
217 while (argc > 1 && **(argv + 1) == '-') {
223 case 'f': /* force */
227 return CMD_RET_USAGE;
231 debug("Final value for argc=%d\n", argc);
235 if (strchr(name, '=')) {
236 printf("## Error: illegal character '='"
237 "in variable name \"%s\"\n", name);
244 if (argc < 3 || argv[2] == NULL) {
245 int rc = hdelete_r(name, &env_htab, env_flag);
250 * Insert / replace new value
252 for (i = 2, len = 0; i < argc; ++i)
253 len += strlen(argv[i]) + 1;
257 printf("## Can't malloc %d bytes\n", len);
260 for (i = 2, s = value; i < argc; ++i) {
263 while ((*s++ = *v++) != '\0')
272 hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
275 printf("## Error inserting \"%s\" variable, errno=%d\n",
283 int setenv(const char *varname, const char *varvalue)
285 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
287 /* before import into hashtable */
288 if (!(gd->flags & GD_FLG_ENV_READY))
291 if (varvalue == NULL || varvalue[0] == '\0')
292 return _do_env_set(0, 2, (char * const *)argv);
294 return _do_env_set(0, 3, (char * const *)argv);
298 * Set an environment variable to an integer value
300 * @param varname Environment variable to set
301 * @param value Value to set it to
302 * @return 0 if ok, 1 on error
304 int setenv_ulong(const char *varname, ulong value)
306 /* TODO: this should be unsigned */
307 char *str = simple_itoa(value);
309 return setenv(varname, str);
313 * Set an environment variable to an value in hex
315 * @param varname Environment variable to set
316 * @param value Value to set it to
317 * @return 0 if ok, 1 on error
319 int setenv_hex(const char *varname, ulong value)
323 sprintf(str, "%lx", value);
324 return setenv(varname, str);
327 ulong getenv_hex(const char *varname, ulong default_val)
335 value = simple_strtoul(s, &endp, 16);
342 #ifndef CONFIG_SPL_BUILD
343 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
346 return CMD_RET_USAGE;
348 return _do_env_set(flag, argc, argv);
352 * Prompt for environment variable
354 #if defined(CONFIG_CMD_ASKENV)
355 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
357 char message[CONFIG_SYS_CBSIZE];
358 int i, len, pos, size;
362 local_args[0] = argv[0];
363 local_args[1] = argv[1];
364 local_args[2] = NULL;
365 local_args[3] = NULL;
370 * env_ask envname [message1 ...] [size]
373 return CMD_RET_USAGE;
376 * We test the last argument if it can be converted
377 * into a decimal number. If yes, we assume it's
378 * the size. Otherwise we echo it as part of the
381 i = simple_strtoul(argv[argc - 1], &endptr, 10);
382 if (*endptr != '\0') { /* no size */
383 size = CONFIG_SYS_CBSIZE - 1;
384 } else { /* size given */
390 sprintf(message, "Please enter '%s': ", argv[1]);
392 /* env_ask envname message1 ... messagen [size] */
393 for (i = 2, pos = 0; i < argc; i++) {
395 message[pos++] = ' ';
397 strcpy(message + pos, argv[i]);
398 pos += strlen(argv[i]);
400 message[pos++] = ' ';
404 if (size >= CONFIG_SYS_CBSIZE)
405 size = CONFIG_SYS_CBSIZE - 1;
410 /* prompt for input */
411 len = readline(message);
414 console_buffer[size] = '\0';
417 if (console_buffer[0] != '\0') {
418 local_args[2] = console_buffer;
422 /* Continue calling setenv code */
423 return _do_env_set(flag, len, local_args);
427 #if defined(CONFIG_CMD_ENV_CALLBACK)
428 static int print_static_binding(const char *var_name, const char *callback_name)
430 printf("\t%-20s %-20s\n", var_name, callback_name);
435 static int print_active_callback(ENTRY *entry)
437 struct env_clbk_tbl *clbkp;
441 if (entry->callback == NULL)
444 /* look up the callback in the linker-list */
445 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
446 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
449 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
450 if (entry->callback == clbkp->callback + gd->reloc_off)
452 if (entry->callback == clbkp->callback)
457 if (i == num_callbacks)
458 /* this should probably never happen, but just in case... */
459 printf("\t%-20s %p\n", entry->key, entry->callback);
461 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
467 * Print the callbacks available and what they are bound to
469 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
471 struct env_clbk_tbl *clbkp;
475 /* Print the available callbacks */
476 puts("Available callbacks:\n");
477 puts("\tCallback Name\n");
478 puts("\t-------------\n");
479 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
480 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
483 printf("\t%s\n", clbkp->name);
486 /* Print the static bindings that may exist */
487 puts("Static callback bindings:\n");
488 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
489 printf("\t%-20s %-20s\n", "-------------", "-------------");
490 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding);
493 /* walk through each variable and print the callback if it has one */
494 puts("Active callback bindings:\n");
495 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
496 printf("\t%-20s %-20s\n", "-------------", "-------------");
497 hwalk_r(&env_htab, print_active_callback);
502 #if defined(CONFIG_CMD_ENV_FLAGS)
503 static int print_static_flags(const char *var_name, const char *flags)
505 enum env_flags_vartype type = env_flags_parse_vartype(flags);
506 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
508 printf("\t%-20s %-20s %-20s\n", var_name,
509 env_flags_get_vartype_name(type),
510 env_flags_get_varaccess_name(access));
515 static int print_active_flags(ENTRY *entry)
517 enum env_flags_vartype type;
518 enum env_flags_varaccess access;
520 if (entry->flags == 0)
523 type = (enum env_flags_vartype)
524 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
525 access = env_flags_parse_varaccess_from_binflags(entry->flags);
526 printf("\t%-20s %-20s %-20s\n", entry->key,
527 env_flags_get_vartype_name(type),
528 env_flags_get_varaccess_name(access));
534 * Print the flags available and what variables have flags
536 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
538 /* Print the available variable types */
539 printf("Available variable type flags (position %d):\n",
540 ENV_FLAGS_VARTYPE_LOC);
541 puts("\tFlag\tVariable Type Name\n");
542 puts("\t----\t------------------\n");
543 env_flags_print_vartypes();
546 /* Print the available variable access types */
547 printf("Available variable access flags (position %d):\n",
548 ENV_FLAGS_VARACCESS_LOC);
549 puts("\tFlag\tVariable Access Name\n");
550 puts("\t----\t--------------------\n");
551 env_flags_print_varaccess();
554 /* Print the static flags that may exist */
555 puts("Static flags:\n");
556 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
558 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
560 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags);
563 /* walk through each variable and print the flags if non-default */
564 puts("Active flags:\n");
565 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
567 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
569 hwalk_r(&env_htab, print_active_flags);
575 * Interactively edit an environment variable
577 #if defined(CONFIG_CMD_EDITENV)
578 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
581 char buffer[CONFIG_SYS_CBSIZE];
585 return CMD_RET_USAGE;
587 /* Set read buffer to initial value or empty sting */
588 init_val = getenv(argv[1]);
590 sprintf(buffer, "%s", init_val);
594 if (readline_into_buffer("edit: ", buffer, 0) < 0)
597 return setenv(argv[1], buffer);
599 #endif /* CONFIG_CMD_EDITENV */
600 #endif /* CONFIG_SPL_BUILD */
603 * Look up variable from environment,
604 * return address of storage for that variable,
605 * or NULL if not found
607 char *getenv(const char *name)
609 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
616 hsearch_r(e, FIND, &ep, &env_htab, 0);
618 return ep ? ep->data : NULL;
621 /* restricted capabilities before import */
622 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
623 return (char *)(gd->env_buf);
629 * Look up variable from environment for restricted C runtime env.
631 int getenv_f(const char *name, char *buf, unsigned len)
635 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
638 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
639 if (nxt >= CONFIG_ENV_SIZE)
643 val = envmatch((uchar *)name, i);
647 /* found; copy out */
648 for (n = 0; n < len; ++n, ++buf) {
649 *buf = env_get_char(val++);
657 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
667 * Decode the integer value of an environment variable and return it.
669 * @param name Name of environemnt variable
670 * @param base Number base to use (normally 10, or 16 for hex)
671 * @param default_val Default value to return if the variable is not
673 * @return the decoded value, or default_val if not found
675 ulong getenv_ulong(const char *name, int base, ulong default_val)
678 * We can use getenv() here, even before relocation, since the
679 * environment variable value is an integer and thus short.
681 const char *str = getenv(name);
683 return str ? simple_strtoul(str, NULL, base) : default_val;
686 #ifndef CONFIG_SPL_BUILD
687 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
688 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
691 printf("Saving Environment to %s...\n", env_name_spec);
693 return saveenv() ? 1 : 0;
697 saveenv, 1, 0, do_env_save,
698 "save environment variables to persistent storage",
702 #endif /* CONFIG_SPL_BUILD */
706 * Match a name / name=value pair
708 * s1 is either a simple 'name', or a 'name=value' pair.
709 * i2 is the environment index for a 'name2=value2' pair.
710 * If the names match, return the index for the value2, else -1.
712 int envmatch(uchar *s1, int i2)
717 while (*s1 == env_get_char(i2++))
721 if (*s1 == '\0' && env_get_char(i2-1) == '=')
727 #ifndef CONFIG_SPL_BUILD
728 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
729 int argc, char * const argv[])
731 int all = 0, flag = 0;
733 debug("Initial value for argc=%d\n", argc);
734 while (--argc > 0 && **++argv == '-') {
739 case 'a': /* default all */
742 case 'f': /* force */
746 return cmd_usage(cmdtp);
750 debug("Final value for argc=%d\n", argc);
751 if (all && (argc == 0)) {
752 /* Reset the whole environment */
753 set_default_env("## Resetting to default environment\n");
756 if (!all && (argc > 0)) {
757 /* Reset individual variables */
758 set_default_vars(argc, argv);
762 return cmd_usage(cmdtp);
765 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
766 int argc, char * const argv[])
768 int env_flag = H_INTERACTIVE;
771 debug("Initial value for argc=%d\n", argc);
772 while (argc > 1 && **(argv + 1) == '-') {
778 case 'f': /* force */
782 return CMD_RET_USAGE;
786 debug("Final value for argc=%d\n", argc);
791 char *name = *++argv;
793 if (!hdelete_r(name, &env_htab, env_flag))
800 #ifdef CONFIG_CMD_EXPORTENV
802 * env export [-t | -b | -c] [-s size] addr [var ...]
803 * -t: export as text format; if size is given, data will be
804 * padded with '\0' bytes; if not, one terminating '\0'
805 * will be added (which is included in the "filesize"
806 * setting so you can for exmple copy this to flash and
807 * keep the termination).
808 * -b: export as binary format (name=value pairs separated by
809 * '\0', list end marked by double "\0\0")
810 * -c: export as checksum protected environment format as
811 * used for example by "saveenv" command
813 * size of output buffer
814 * addr: memory address where environment gets stored
815 * var... List of variable names that get included into the
816 * export. Without arguments, the whole environment gets
819 * With "-c" and size is NOT given, then the export command will
820 * format the data as currently used for the persistent storage,
821 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
822 * prepend a valid CRC32 checksum and, in case of resundant
823 * environment, a "current" redundancy flag. If size is given, this
824 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
825 * checksum and redundancy flag will be inserted.
827 * With "-b" and "-t", always only the real data (including a
828 * terminating '\0' byte) will be written; here the optional size
829 * argument will be used to make sure not to overflow the user
830 * provided buffer; the command will abort if the size is not
831 * sufficient. Any remainign space will be '\0' padded.
833 * On successful return, the variable "filesize" will be set.
834 * Note that filesize includes the trailing/terminating '\0' byte(s).
836 * Usage szenario: create a text snapshot/backup of the current settings:
838 * => env export -t 100000
839 * => era ${backup_addr} +${filesize}
840 * => cp.b 100000 ${backup_addr} ${filesize}
842 * Re-import this snapshot, deleting all other settings:
844 * => env import -d -t ${backup_addr}
846 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
847 int argc, char * const argv[])
851 char *ptr, *cmd, *res;
861 while (--argc > 0 && **++argv == '-') {
865 case 'b': /* raw binary format */
870 case 'c': /* external checksum format */
876 case 's': /* size given */
878 return cmd_usage(cmdtp);
879 size = simple_strtoul(*++argv, NULL, 16);
881 case 't': /* text format */
887 return CMD_RET_USAGE;
894 return CMD_RET_USAGE;
896 addr = simple_strtoul(argv[0], NULL, 16);
897 ptr = map_sysmem(addr, size);
900 memset(ptr, '\0', size);
905 if (sep) { /* export as text file */
906 len = hexport_r(&env_htab, sep,
907 H_MATCH_KEY | H_MATCH_IDENT,
908 &ptr, size, argc, argv);
910 error("Cannot export environment: errno = %d\n", errno);
913 sprintf(buf, "%zX", (size_t)len);
914 setenv("filesize", buf);
921 if (chk) /* export as checksum protected block */
922 res = (char *)envp->data;
923 else /* export as raw binary data */
926 len = hexport_r(&env_htab, '\0',
927 H_MATCH_KEY | H_MATCH_IDENT,
928 &res, ENV_SIZE, argc, argv);
930 error("Cannot export environment: errno = %d\n", errno);
935 envp->crc = crc32(0, envp->data, ENV_SIZE);
936 #ifdef CONFIG_ENV_ADDR_REDUND
937 envp->flags = ACTIVE_FLAG;
940 setenv_hex("filesize", len + offsetof(env_t, data));
945 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
950 #ifdef CONFIG_CMD_IMPORTENV
952 * env import [-d] [-t | -b | -c] addr [size]
953 * -d: delete existing environment before importing;
954 * otherwise overwrite / append to existion definitions
955 * -t: assume text format; either "size" must be given or the
956 * text data must be '\0' terminated
957 * -b: assume binary format ('\0' separated, "\0\0" terminated)
958 * -c: assume checksum protected environment format
959 * addr: memory address to read from
960 * size: length of input data; if missing, proper '\0'
961 * termination is mandatory
963 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
964 int argc, char * const argv[])
976 while (--argc > 0 && **++argv == '-') {
980 case 'b': /* raw binary format */
985 case 'c': /* external checksum format */
991 case 't': /* text format */
1000 return CMD_RET_USAGE;
1006 return CMD_RET_USAGE;
1009 printf("## Warning: defaulting to text format\n");
1011 addr = simple_strtoul(argv[0], NULL, 16);
1012 ptr = map_sysmem(addr, 0);
1015 size = simple_strtoul(argv[1], NULL, 16);
1016 } else if (argc == 1 && chk) {
1017 puts("## Error: external checksum format must pass size\n");
1018 return CMD_RET_FAILURE;
1024 while (size < MAX_ENV_SIZE) {
1025 if ((*s == sep) && (*(s+1) == '\0'))
1030 if (size == MAX_ENV_SIZE) {
1031 printf("## Warning: Input data exceeds %d bytes"
1032 " - truncated\n", MAX_ENV_SIZE);
1035 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1040 env_t *ep = (env_t *)ptr;
1042 size -= offsetof(env_t, data);
1043 memcpy(&crc, &ep->crc, sizeof(crc));
1045 if (crc32(0, ep->data, size) != crc) {
1046 puts("## Error: bad CRC, import failed\n");
1049 ptr = (char *)ep->data;
1052 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR, 0,
1054 error("Environment import failed: errno = %d\n", errno);
1057 gd->flags |= GD_FLG_ENV_READY;
1062 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1068 #if defined(CONFIG_CMD_ENV_EXISTS)
1069 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1070 char * const argv[])
1075 return CMD_RET_USAGE;
1079 hsearch_r(e, FIND, &ep, &env_htab, 0);
1081 return (ep == NULL) ? 1 : 0;
1086 * New command line interface: "env" command with subcommands
1088 static cmd_tbl_t cmd_env_sub[] = {
1089 #if defined(CONFIG_CMD_ASKENV)
1090 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1092 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1093 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1094 #if defined(CONFIG_CMD_EDITENV)
1095 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1097 #if defined(CONFIG_CMD_ENV_CALLBACK)
1098 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1100 #if defined(CONFIG_CMD_ENV_FLAGS)
1101 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1103 #if defined(CONFIG_CMD_EXPORTENV)
1104 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1106 #if defined(CONFIG_CMD_GREPENV)
1107 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1109 #if defined(CONFIG_CMD_IMPORTENV)
1110 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1112 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1113 #if defined(CONFIG_CMD_RUN)
1114 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1116 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1117 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1119 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1120 #if defined(CONFIG_CMD_ENV_EXISTS)
1121 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1125 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1126 void env_reloc(void)
1128 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1132 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1137 return CMD_RET_USAGE;
1139 /* drop initial "env" arg */
1143 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1146 return cp->cmd(cmdtp, flag, argc, argv);
1148 return CMD_RET_USAGE;
1151 #ifdef CONFIG_SYS_LONGHELP
1152 static char env_help_text[] =
1153 #if defined(CONFIG_CMD_ASKENV)
1154 "ask name [message] [size] - ask for environment variable\nenv "
1156 #if defined(CONFIG_CMD_ENV_CALLBACK)
1157 "callbacks - print callbacks and their associated variables\nenv "
1159 "default [-f] -a - [forcibly] reset default environment\n"
1160 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1161 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1162 #if defined(CONFIG_CMD_EDITENV)
1163 "env edit name - edit environment variable\n"
1165 #if defined(CONFIG_CMD_ENV_EXISTS)
1166 "env exists name - tests for existence of variable\n"
1168 #if defined(CONFIG_CMD_EXPORTENV)
1169 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1171 #if defined(CONFIG_CMD_ENV_FLAGS)
1172 "env flags - print variables that have non-default flags\n"
1174 #if defined(CONFIG_CMD_GREPENV)
1176 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1178 "env grep [-n | -v | -b] string [...] - search environment\n"
1181 #if defined(CONFIG_CMD_IMPORTENV)
1182 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1184 "env print [-a | name ...] - print environment\n"
1185 #if defined(CONFIG_CMD_RUN)
1186 "env run var [...] - run commands in an environment variable\n"
1188 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1189 "env save - save environment\n"
1191 "env set [-f] name [arg ...]\n";
1195 env, CONFIG_SYS_MAXARGS, 1, do_env,
1196 "environment handling commands", env_help_text
1200 * Old command line interface, kept for compatibility
1203 #if defined(CONFIG_CMD_EDITENV)
1204 U_BOOT_CMD_COMPLETE(
1205 editenv, 2, 0, do_env_edit,
1206 "edit environment variable",
1208 " - edit environment variable 'name'",
1213 U_BOOT_CMD_COMPLETE(
1214 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1215 "print environment variables",
1216 "[-a]\n - print [all] values of all environment variables\n"
1217 "printenv name ...\n"
1218 " - print value of environment variable 'name'",
1222 #ifdef CONFIG_CMD_GREPENV
1223 U_BOOT_CMD_COMPLETE(
1224 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1225 "search environment variables",
1227 "[-e] [-n | -v | -b] string ...\n"
1229 "[-n | -v | -b] string ...\n"
1231 " - list environment name=value pairs matching 'string'\n"
1233 " \"-e\": enable regular expressions;\n"
1235 " \"-n\": search variable names; \"-v\": search values;\n"
1236 " \"-b\": search both names and values (default)",
1241 U_BOOT_CMD_COMPLETE(
1242 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1243 "set environment variables",
1244 "[-f] name value ...\n"
1245 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1246 "setenv [-f] name\n"
1247 " - [forcibly] delete environment variable 'name'",
1251 #if defined(CONFIG_CMD_ASKENV)
1254 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1255 "get environment variables from stdin",
1256 "name [message] [size]\n"
1257 " - get environment variable 'name' from stdin (max 'size' chars)"
1261 #if defined(CONFIG_CMD_RUN)
1262 U_BOOT_CMD_COMPLETE(
1263 run, CONFIG_SYS_MAXARGS, 1, do_run,
1264 "run commands in an environment variable",
1266 " - run the commands in the environment variable(s) 'var'",
1270 #endif /* CONFIG_SPL_BUILD */