2 * (C) Copyright 2000-2010
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 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * Support for persistent environment data
32 * The "environment" is stored on external storage as a list of '\0'
33 * terminated "name=value" strings. The end of the list is marked by
34 * a double '\0'. The environment is preceeded by a 32 bit CRC over
35 * the data part and, in case of redundant environment, a byte of
38 * This linearized representation will also be used before
39 * relocation, i. e. as long as we don't have a full C runtime
40 * environment. After that, we use a hash table.
45 #include <environment.h>
50 #include <linux/stddef.h>
51 #include <asm/byteorder.h>
53 DECLARE_GLOBAL_DATA_PTR;
55 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
56 !defined(CONFIG_ENV_IS_IN_FLASH) && \
57 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
58 !defined(CONFIG_ENV_IS_IN_MMC) && \
59 !defined(CONFIG_ENV_IS_IN_FAT) && \
60 !defined(CONFIG_ENV_IS_IN_NAND) && \
61 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
62 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
63 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
64 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
65 !defined(CONFIG_ENV_IS_NOWHERE)
66 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
67 SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
71 * Maximum expected input data size for import command
73 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
76 * This variable is incremented on each do_env_set(), so it can
77 * be used via get_env_id() as an indication, if the environment
78 * has changed or not. So it is possible to reread an environment
79 * variable only if the environment was changed ... done so for
80 * example in NetInitLoop()
82 static int env_id = 1;
89 #ifndef CONFIG_SPL_BUILD
91 * Command interface: print one or all environment variables
93 * Returns 0 in case of error, or length of printed string
95 static int env_print(char *name, int flag)
100 if (name) { /* print a single name */
105 hsearch_r(e, FIND, &ep, &env_htab, flag);
108 len = printf("%s=%s\n", ep->key, ep->data);
112 /* print whole list */
113 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
121 /* should never happen */
125 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
130 int env_flag = H_HIDE_DOT;
132 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
135 env_flag &= ~H_HIDE_DOT;
139 /* print all env vars */
140 rcode = env_print(NULL, env_flag);
143 printf("\nEnvironment size: %d/%ld bytes\n",
144 rcode, (ulong)ENV_SIZE);
148 /* print selected env vars */
149 env_flag &= ~H_HIDE_DOT;
150 for (i = 1; i < argc; ++i) {
151 int rc = env_print(argv[i], env_flag);
153 printf("## Error: \"%s\" not defined\n", argv[i]);
161 #ifdef CONFIG_CMD_GREPENV
162 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
163 int argc, char * const argv[])
166 unsigned char matched[env_htab.size / 8];
167 int rcode = 1, arg = 1, idx;
170 return CMD_RET_USAGE;
172 memset(matched, 0, env_htab.size / 8);
174 while (arg <= argc) {
176 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
177 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
183 matched[idx / 8] |= 1 << (idx & 7);
192 #endif /* CONFIG_SPL_BUILD */
195 * Set a new environment variable,
196 * or replace or delete an existing one.
198 static int _do_env_set(int flag, int argc, char * const argv[])
201 char *name, *value, *s;
207 if (strchr(name, '=')) {
208 printf("## Error: illegal character '='"
209 "in variable name \"%s\"\n", name);
216 if (argc < 3 || argv[2] == NULL) {
217 int rc = hdelete_r(name, &env_htab, H_INTERACTIVE);
222 * Insert / replace new value
224 for (i = 2, len = 0; i < argc; ++i)
225 len += strlen(argv[i]) + 1;
229 printf("## Can't malloc %d bytes\n", len);
232 for (i = 2, s = value; i < argc; ++i) {
235 while ((*s++ = *v++) != '\0')
244 hsearch_r(e, ENTER, &ep, &env_htab, H_INTERACTIVE);
247 printf("## Error inserting \"%s\" variable, errno=%d\n",
255 int setenv(const char *varname, const char *varvalue)
257 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
259 if (varvalue == NULL || varvalue[0] == '\0')
260 return _do_env_set(0, 2, (char * const *)argv);
262 return _do_env_set(0, 3, (char * const *)argv);
266 * Set an environment variable to an integer value
268 * @param varname Environmet variable to set
269 * @param value Value to set it to
270 * @return 0 if ok, 1 on error
272 int setenv_ulong(const char *varname, ulong value)
274 /* TODO: this should be unsigned */
275 char *str = simple_itoa(value);
277 return setenv(varname, str);
281 * Set an environment variable to an address in hex
283 * @param varname Environmet variable to set
284 * @param addr Value to set it to
285 * @return 0 if ok, 1 on error
287 int setenv_addr(const char *varname, const void *addr)
291 sprintf(str, "%lx", (uintptr_t)addr);
292 return setenv(varname, str);
295 #ifndef CONFIG_SPL_BUILD
296 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
299 return CMD_RET_USAGE;
301 return _do_env_set(flag, argc, argv);
305 * Prompt for environment variable
307 #if defined(CONFIG_CMD_ASKENV)
308 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
310 char message[CONFIG_SYS_CBSIZE];
311 int size = CONFIG_SYS_CBSIZE - 1;
315 local_args[0] = argv[0];
316 local_args[1] = argv[1];
317 local_args[2] = NULL;
318 local_args[3] = NULL;
320 /* Check the syntax */
323 return CMD_RET_USAGE;
325 case 2: /* env_ask envname */
326 sprintf(message, "Please enter '%s':", argv[1]);
329 case 3: /* env_ask envname size */
330 sprintf(message, "Please enter '%s':", argv[1]);
331 size = simple_strtoul(argv[2], NULL, 10);
334 default: /* env_ask envname message1 ... messagen size */
335 for (i = 2, pos = 0; i < argc - 1; i++) {
337 message[pos++] = ' ';
339 strcpy(message + pos, argv[i]);
340 pos += strlen(argv[i]);
344 size = simple_strtoul(argv[argc - 1], NULL, 10);
348 if (size >= CONFIG_SYS_CBSIZE)
349 size = CONFIG_SYS_CBSIZE - 1;
354 /* prompt for input */
355 len = readline(message);
358 console_buffer[size] = '\0';
361 if (console_buffer[0] != '\0') {
362 local_args[2] = console_buffer;
366 /* Continue calling setenv code */
367 return _do_env_set(flag, len, local_args);
371 #if defined(CONFIG_CMD_ENV_CALLBACK)
372 static int print_static_binding(const char *var_name, const char *callback_name)
374 printf("\t%-20s %-20s\n", var_name, callback_name);
379 static int print_active_callback(ENTRY *entry)
381 struct env_clbk_tbl *clbkp;
385 if (entry->callback == NULL)
388 /* look up the callback in the linker-list */
389 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
390 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
393 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
394 if (entry->callback == clbkp->callback + gd->reloc_off)
396 if (entry->callback == clbkp->callback)
401 if (i == num_callbacks)
402 /* this should probably never happen, but just in case... */
403 printf("\t%-20s %p\n", entry->key, entry->callback);
405 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
411 * Print the callbacks available and what they are bound to
413 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
415 struct env_clbk_tbl *clbkp;
419 /* Print the available callbacks */
420 puts("Available callbacks:\n");
421 puts("\tCallback Name\n");
422 puts("\t-------------\n");
423 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
424 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
427 printf("\t%s\n", clbkp->name);
430 /* Print the static bindings that may exist */
431 puts("Static callback bindings:\n");
432 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
433 printf("\t%-20s %-20s\n", "-------------", "-------------");
434 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding);
437 /* walk through each variable and print the callback if it has one */
438 puts("Active callback bindings:\n");
439 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
440 printf("\t%-20s %-20s\n", "-------------", "-------------");
441 hwalk_r(&env_htab, print_active_callback);
447 * Interactively edit an environment variable
449 #if defined(CONFIG_CMD_EDITENV)
450 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
453 char buffer[CONFIG_SYS_CBSIZE];
457 return CMD_RET_USAGE;
459 /* Set read buffer to initial value or empty sting */
460 init_val = getenv(argv[1]);
462 sprintf(buffer, "%s", init_val);
466 readline_into_buffer("edit: ", buffer, 0);
468 return setenv(argv[1], buffer);
470 #endif /* CONFIG_CMD_EDITENV */
471 #endif /* CONFIG_SPL_BUILD */
474 * Look up variable from environment,
475 * return address of storage for that variable,
476 * or NULL if not found
478 char *getenv(const char *name)
480 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
487 hsearch_r(e, FIND, &ep, &env_htab, 0);
489 return ep ? ep->data : NULL;
492 /* restricted capabilities before import */
493 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
494 return (char *)(gd->env_buf);
500 * Look up variable from environment for restricted C runtime env.
502 int getenv_f(const char *name, char *buf, unsigned len)
506 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
509 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
510 if (nxt >= CONFIG_ENV_SIZE)
514 val = envmatch((uchar *)name, i);
518 /* found; copy out */
519 for (n = 0; n < len; ++n, ++buf) {
520 *buf = env_get_char(val++);
528 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
538 * Decode the integer value of an environment variable and return it.
540 * @param name Name of environemnt variable
541 * @param base Number base to use (normally 10, or 16 for hex)
542 * @param default_val Default value to return if the variable is not
544 * @return the decoded value, or default_val if not found
546 ulong getenv_ulong(const char *name, int base, ulong default_val)
549 * We can use getenv() here, even before relocation, since the
550 * environment variable value is an integer and thus short.
552 const char *str = getenv(name);
554 return str ? simple_strtoul(str, NULL, base) : default_val;
557 #ifndef CONFIG_SPL_BUILD
558 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
559 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
562 printf("Saving Environment to %s...\n", env_name_spec);
564 return saveenv() ? 1 : 0;
568 saveenv, 1, 0, do_env_save,
569 "save environment variables to persistent storage",
573 #endif /* CONFIG_SPL_BUILD */
577 * Match a name / name=value pair
579 * s1 is either a simple 'name', or a 'name=value' pair.
580 * i2 is the environment index for a 'name2=value2' pair.
581 * If the names match, return the index for the value2, else -1.
583 int envmatch(uchar *s1, int i2)
588 while (*s1 == env_get_char(i2++))
592 if (*s1 == '\0' && env_get_char(i2-1) == '=')
598 #ifndef CONFIG_SPL_BUILD
599 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
600 int argc, char * const argv[])
602 int all = 0, flag = 0;
604 debug("Initial value for argc=%d\n", argc);
605 while (--argc > 0 && **++argv == '-') {
610 case 'a': /* default all */
613 case 'f': /* force */
617 return cmd_usage(cmdtp);
621 debug("Final value for argc=%d\n", argc);
622 if (all && (argc == 0)) {
623 /* Reset the whole environment */
624 set_default_env("## Resetting to default environment\n");
627 if (!all && (argc > 0)) {
628 /* Reset individual variables */
629 set_default_vars(argc, argv);
633 return cmd_usage(cmdtp);
636 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
637 int argc, char * const argv[])
639 printf("Not implemented yet\n");
643 #ifdef CONFIG_CMD_EXPORTENV
645 * env export [-t | -b | -c] [-s size] addr [var ...]
646 * -t: export as text format; if size is given, data will be
647 * padded with '\0' bytes; if not, one terminating '\0'
648 * will be added (which is included in the "filesize"
649 * setting so you can for exmple copy this to flash and
650 * keep the termination).
651 * -b: export as binary format (name=value pairs separated by
652 * '\0', list end marked by double "\0\0")
653 * -c: export as checksum protected environment format as
654 * used for example by "saveenv" command
656 * size of output buffer
657 * addr: memory address where environment gets stored
658 * var... List of variable names that get included into the
659 * export. Without arguments, the whole environment gets
662 * With "-c" and size is NOT given, then the export command will
663 * format the data as currently used for the persistent storage,
664 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
665 * prepend a valid CRC32 checksum and, in case of resundant
666 * environment, a "current" redundancy flag. If size is given, this
667 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
668 * checksum and redundancy flag will be inserted.
670 * With "-b" and "-t", always only the real data (including a
671 * terminating '\0' byte) will be written; here the optional size
672 * argument will be used to make sure not to overflow the user
673 * provided buffer; the command will abort if the size is not
674 * sufficient. Any remainign space will be '\0' padded.
676 * On successful return, the variable "filesize" will be set.
677 * Note that filesize includes the trailing/terminating '\0' byte(s).
679 * Usage szenario: create a text snapshot/backup of the current settings:
681 * => env export -t 100000
682 * => era ${backup_addr} +${filesize}
683 * => cp.b 100000 ${backup_addr} ${filesize}
685 * Re-import this snapshot, deleting all other settings:
687 * => env import -d -t ${backup_addr}
689 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
690 int argc, char * const argv[])
693 char *addr, *cmd, *res;
703 while (--argc > 0 && **++argv == '-') {
707 case 'b': /* raw binary format */
712 case 'c': /* external checksum format */
718 case 's': /* size given */
720 return cmd_usage(cmdtp);
721 size = simple_strtoul(*++argv, NULL, 16);
723 case 't': /* text format */
729 return CMD_RET_USAGE;
736 return CMD_RET_USAGE;
738 addr = (char *)simple_strtoul(argv[0], NULL, 16);
741 memset(addr, '\0', size);
746 if (sep) { /* export as text file */
747 len = hexport_r(&env_htab, sep, 0, &addr, size, argc, argv);
749 error("Cannot export environment: errno = %d\n", errno);
752 sprintf(buf, "%zX", (size_t)len);
753 setenv("filesize", buf);
758 envp = (env_t *)addr;
760 if (chk) /* export as checksum protected block */
761 res = (char *)envp->data;
762 else /* export as raw binary data */
765 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, argc, argv);
767 error("Cannot export environment: errno = %d\n", errno);
772 envp->crc = crc32(0, envp->data, ENV_SIZE);
773 #ifdef CONFIG_ENV_ADDR_REDUND
774 envp->flags = ACTIVE_FLAG;
777 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
778 setenv("filesize", buf);
783 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
788 #ifdef CONFIG_CMD_IMPORTENV
790 * env import [-d] [-t | -b | -c] addr [size]
791 * -d: delete existing environment before importing;
792 * otherwise overwrite / append to existion definitions
793 * -t: assume text format; either "size" must be given or the
794 * text data must be '\0' terminated
795 * -b: assume binary format ('\0' separated, "\0\0" terminated)
796 * -c: assume checksum protected environment format
797 * addr: memory address to read from
798 * size: length of input data; if missing, proper '\0'
799 * termination is mandatory
801 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
802 int argc, char * const argv[])
813 while (--argc > 0 && **++argv == '-') {
817 case 'b': /* raw binary format */
822 case 'c': /* external checksum format */
828 case 't': /* text format */
837 return CMD_RET_USAGE;
843 return CMD_RET_USAGE;
846 printf("## Warning: defaulting to text format\n");
848 addr = (char *)simple_strtoul(argv[0], NULL, 16);
851 size = simple_strtoul(argv[1], NULL, 16);
857 while (size < MAX_ENV_SIZE) {
858 if ((*s == sep) && (*(s+1) == '\0'))
863 if (size == MAX_ENV_SIZE) {
864 printf("## Warning: Input data exceeds %d bytes"
865 " - truncated\n", MAX_ENV_SIZE);
868 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
873 env_t *ep = (env_t *)addr;
875 size -= offsetof(env_t, data);
876 memcpy(&crc, &ep->crc, sizeof(crc));
878 if (crc32(0, ep->data, size) != crc) {
879 puts("## Error: bad CRC, import failed\n");
882 addr = (char *)ep->data;
885 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
887 error("Environment import failed: errno = %d\n", errno);
890 gd->flags |= GD_FLG_ENV_READY;
895 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
902 * New command line interface: "env" command with subcommands
904 static cmd_tbl_t cmd_env_sub[] = {
905 #if defined(CONFIG_CMD_ASKENV)
906 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
908 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
909 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
910 #if defined(CONFIG_CMD_EDITENV)
911 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
913 #if defined(CONFIG_CMD_ENV_CALLBACK)
914 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
916 #if defined(CONFIG_CMD_EXPORTENV)
917 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
919 #if defined(CONFIG_CMD_GREPENV)
920 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
922 #if defined(CONFIG_CMD_IMPORTENV)
923 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
925 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
926 #if defined(CONFIG_CMD_RUN)
927 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
929 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
930 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
932 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
935 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
938 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
942 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
947 return CMD_RET_USAGE;
949 /* drop initial "env" arg */
953 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
956 return cp->cmd(cmdtp, flag, argc, argv);
958 return CMD_RET_USAGE;
961 #ifdef CONFIG_SYS_LONGHELP
962 static char env_help_text[] =
963 #if defined(CONFIG_CMD_ASKENV)
964 "ask name [message] [size] - ask for environment variable\nenv "
966 #if defined(CONFIG_CMD_ENV_CALLBACK)
967 "callbacks - print callbacks and their associated variables\nenv "
969 "default [-f] -a - [forcibly] reset default environment\n"
970 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
971 #if defined(CONFIG_CMD_EDITENV)
972 "env edit name - edit environment variable\n"
974 #if defined(CONFIG_CMD_EXPORTENV)
975 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
977 #if defined(CONFIG_CMD_GREPENV)
978 "env grep string [...] - search environment\n"
980 #if defined(CONFIG_CMD_IMPORTENV)
981 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
983 "env print [-a | name ...] - print environment\n"
984 #if defined(CONFIG_CMD_RUN)
985 "env run var [...] - run commands in an environment variable\n"
987 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
988 "env save - save environment\n"
990 "env set [-f] name [arg ...]\n";
994 env, CONFIG_SYS_MAXARGS, 1, do_env,
995 "environment handling commands", env_help_text
999 * Old command line interface, kept for compatibility
1002 #if defined(CONFIG_CMD_EDITENV)
1003 U_BOOT_CMD_COMPLETE(
1004 editenv, 2, 0, do_env_edit,
1005 "edit environment variable",
1007 " - edit environment variable 'name'",
1012 U_BOOT_CMD_COMPLETE(
1013 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1014 "print environment variables",
1015 "[-a]\n - print [all] values of all environment variables\n"
1016 "printenv name ...\n"
1017 " - print value of environment variable 'name'",
1021 #ifdef CONFIG_CMD_GREPENV
1022 U_BOOT_CMD_COMPLETE(
1023 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1024 "search environment variables",
1026 " - list environment name=value pairs matching 'string'",
1031 U_BOOT_CMD_COMPLETE(
1032 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1033 "set environment variables",
1035 " - set environment variable 'name' to 'value ...'\n"
1037 " - delete environment variable 'name'",
1041 #if defined(CONFIG_CMD_ASKENV)
1044 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1045 "get environment variables from stdin",
1046 "name [message] [size]\n"
1047 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1049 " - get environment variable 'name' from stdin\n"
1050 "askenv name size\n"
1051 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1052 "askenv name [message] size\n"
1053 " - display 'message' string and get environment variable 'name'"
1054 "from stdin (max 'size' chars)"
1058 #if defined(CONFIG_CMD_RUN)
1059 U_BOOT_CMD_COMPLETE(
1060 run, CONFIG_SYS_MAXARGS, 1, do_run,
1061 "run commands in an environment variable",
1063 " - run the commands in the environment variable(s) 'var'",
1067 #endif /* CONFIG_SPL_BUILD */