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>
51 #include <linux/stddef.h>
52 #include <asm/byteorder.h>
53 #if defined(CONFIG_CMD_NET)
57 DECLARE_GLOBAL_DATA_PTR;
59 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
60 !defined(CONFIG_ENV_IS_IN_FLASH) && \
61 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
62 !defined(CONFIG_ENV_IS_IN_MG_DISK) && \
63 !defined(CONFIG_ENV_IS_IN_MMC) && \
64 !defined(CONFIG_ENV_IS_IN_NAND) && \
65 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
66 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
67 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
68 !defined(CONFIG_ENV_IS_NOWHERE)
69 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
70 SPI_FLASH|MG_DISK|NVRAM|MMC} or CONFIG_ENV_IS_NOWHERE
74 #define MK_STR(x) XMK_STR(x)
77 * Maximum expected input data size for import command
79 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
81 ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
84 * Table with supported baudrates (defined in config_xyz.h)
86 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
87 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
90 * This variable is incremented on each do_env_set(), so it can
91 * be used via get_env_id() as an indication, if the environment
92 * has changed or not. So it is possible to reread an environment
93 * variable only if the environment was changed ... done so for
94 * example in NetInitLoop()
96 static int env_id = 1;
104 * Command interface: print one or all environment variables
106 * Returns 0 in case of error, or length of printed string
108 static int env_print(char *name)
113 if (name) { /* print a single name */
118 hsearch_r(e, FIND, &ep, &env_htab);
121 len = printf("%s=%s\n", ep->key, ep->data);
125 /* print whole list */
126 len = hexport_r(&env_htab, '\n', &res, 0);
134 /* should never happen */
138 int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
144 /* print all env vars */
145 rcode = env_print(NULL);
148 printf("\nEnvironment size: %d/%ld bytes\n",
149 rcode, (ulong)ENV_SIZE);
153 /* print selected env vars */
154 for (i = 1; i < argc; ++i) {
155 int rc = env_print(argv[i]);
157 printf("## Error: \"%s\" not defined\n", argv[i]);
165 #ifdef CONFIG_CMD_GREPENV
166 static int do_env_grep (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
169 unsigned char matched[env_htab.size / 8];
170 int rcode = 1, arg = 1, idx;
173 return cmd_usage(cmdtp);
175 memset(matched, 0, env_htab.size / 8);
177 while (arg <= argc) {
179 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
180 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
186 matched[idx / 8] |= 1 << (idx & 7);
197 * Set a new environment variable,
198 * or replace or delete an existing one.
201 int _do_env_set (int flag, int argc, char * const argv[])
206 char *name, *value, *s;
211 if (strchr(name, '=')) {
212 printf("## Error: illegal character '=' in variable name \"%s\"\n", name);
218 * search if variable with this name already exists
222 hsearch_r(e, FIND, &ep, &env_htab);
224 /* Check for console redirection */
225 if (strcmp(name, "stdin") == 0)
227 else if (strcmp(name, "stdout") == 0)
229 else if (strcmp(name, "stderr") == 0)
233 if (argc < 3) { /* Cannot delete it! */
234 printf("Can't delete \"%s\"\n", name);
238 #ifdef CONFIG_CONSOLE_MUX
239 i = iomux_doenv(console, argv[2]);
243 /* Try assigning specified device */
244 if (console_assign(console, argv[2]) < 0)
247 #ifdef CONFIG_SERIAL_MULTI
248 if (serial_assign(argv[2]) < 0)
251 #endif /* CONFIG_CONSOLE_MUX */
255 * Some variables like "ethaddr" and "serial#" can be set only
256 * once and cannot be deleted; also, "ver" is readonly.
258 if (ep) { /* variable exists */
259 #ifndef CONFIG_ENV_OVERWRITE
260 if ((strcmp(name, "serial#") == 0) ||
261 ((strcmp(name, "ethaddr") == 0)
262 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
263 && (strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0)
264 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
266 printf("Can't overwrite \"%s\"\n", name);
271 * Switch to new baudrate if new baudrate is supported
273 if (strcmp(name, "baudrate") == 0) {
274 int baudrate = simple_strtoul(argv[2], NULL, 10);
276 for (i = 0; i < N_BAUDRATES; ++i) {
277 if (baudrate == baudrate_table[i])
280 if (i == N_BAUDRATES) {
281 printf("## Baudrate %d bps not supported\n",
285 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
288 gd->baudrate = baudrate;
289 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
290 gd->bd->bi_baudrate = baudrate;
303 if ((argc < 3) || argv[2] == NULL) {
304 int rc = hdelete_r(name, &env_htab);
309 * Insert / replace new value
311 for (i = 2, len = 0; i < argc; ++i)
312 len += strlen(argv[i]) + 1;
316 printf("## Can't malloc %d bytes\n", len);
319 for (i = 2, s = value; i < argc; ++i) {
322 while ((*s++ = *v++) != '\0')
331 hsearch_r(e, ENTER, &ep, &env_htab);
334 printf("## Error inserting \"%s\" variable, errno=%d\n",
340 * Some variables should be updated when the corresponding
341 * entry in the environment is changed
344 if (strcmp(name, "ipaddr") == 0) {
345 char *s = argv[2]; /* always use only one arg */
349 for (addr = 0, i = 0; i < 4; ++i) {
350 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
352 addr |= (val & 0xFF);
353 if (s) s = (*e) ? e+1 : e;
355 bd->bi_ip_addr = htonl(addr);
357 } else if (strcmp(argv[1], "loadaddr") == 0) {
358 load_addr = simple_strtoul(argv[2], NULL, 16);
361 #if defined(CONFIG_CMD_NET)
362 else if (strcmp(argv[1], "bootfile") == 0) {
363 copy_filename(BootFile, argv[2], sizeof(BootFile));
370 int setenv(const char *varname, const char *varvalue)
372 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
374 if ((varvalue == NULL) || (varvalue[0] == '\0'))
375 return _do_env_set(0, 2, (char * const *)argv);
377 return _do_env_set(0, 3, (char * const *)argv);
381 * Set an environment variable to an integer value
383 * @param varname Environmet variable to set
384 * @param value Value to set it to
385 * @return 0 if ok, 1 on error
387 int setenv_ulong(const char *varname, ulong value)
389 /* TODO: this should be unsigned */
390 char *str = simple_itoa(value);
392 return setenv(varname, str);
396 * Set an environment variable to an address in hex
398 * @param varname Environmet variable to set
399 * @param addr Value to set it to
400 * @return 0 if ok, 1 on error
402 int setenv_addr(const char *varname, const void *addr)
406 sprintf(str, "%x", (uintptr_t)addr);
407 return setenv(varname, str);
410 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
413 return cmd_usage(cmdtp);
415 return _do_env_set(flag, argc, argv);
419 * Prompt for environment variable
421 #if defined(CONFIG_CMD_ASKENV)
422 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
424 extern char console_buffer[CONFIG_SYS_CBSIZE];
425 char message[CONFIG_SYS_CBSIZE];
426 int size = CONFIG_SYS_CBSIZE - 1;
430 local_args[0] = argv[0];
431 local_args[1] = argv[1];
432 local_args[2] = NULL;
433 local_args[3] = NULL;
435 /* Check the syntax */
438 return cmd_usage(cmdtp);
440 case 2: /* env_ask envname */
441 sprintf(message, "Please enter '%s':", argv[1]);
444 case 3: /* env_ask envname size */
445 sprintf(message, "Please enter '%s':", argv[1]);
446 size = simple_strtoul(argv[2], NULL, 10);
449 default: /* env_ask envname message1 ... messagen size */
450 for (i = 2, pos = 0; i < argc - 1; i++) {
452 message[pos++] = ' ';
454 strcpy(message+pos, argv[i]);
455 pos += strlen(argv[i]);
458 size = simple_strtoul(argv[argc - 1], NULL, 10);
462 if (size >= CONFIG_SYS_CBSIZE)
463 size = CONFIG_SYS_CBSIZE - 1;
468 /* prompt for input */
469 len = readline(message);
472 console_buffer[size] = '\0';
475 if (console_buffer[0] != '\0') {
476 local_args[2] = console_buffer;
480 /* Continue calling setenv code */
481 return _do_env_set(flag, len, local_args);
486 * Interactively edit an environment variable
488 #if defined(CONFIG_CMD_EDITENV)
489 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
491 char buffer[CONFIG_SYS_CBSIZE];
495 return cmd_usage(cmdtp);
497 /* Set read buffer to initial value or empty sting */
498 init_val = getenv(argv[1]);
500 sprintf(buffer, "%s", init_val);
504 readline_into_buffer("edit: ", buffer);
506 return setenv(argv[1], buffer);
508 #endif /* CONFIG_CMD_EDITENV */
511 * Look up variable from environment,
512 * return address of storage for that variable,
513 * or NULL if not found
515 char *getenv(const char *name)
517 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
524 hsearch_r(e, FIND, &ep, &env_htab);
526 return ep ? ep->data : NULL;
529 /* restricted capabilities before import */
531 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
532 return (char *)(gd->env_buf);
538 * Look up variable from environment for restricted C runtime env.
540 int getenv_f(const char *name, char *buf, unsigned len)
544 for (i = 0; env_get_char(i) != '\0'; i = nxt+1) {
547 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
548 if (nxt >= CONFIG_ENV_SIZE)
552 val = envmatch((uchar *)name, i);
556 /* found; copy out */
557 for (n = 0; n < len; ++n, ++buf) {
558 if ((*buf = env_get_char(val++)) == '\0')
565 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
574 * Decode the integer value of an environment variable and return it.
576 * @param name Name of environemnt variable
577 * @param base Number base to use (normally 10, or 16 for hex)
578 * @param default_val Default value to return if the variable is not
580 * @return the decoded value, or default_val if not found
582 ulong getenv_ulong(const char *name, int base, ulong default_val)
585 * We can use getenv() here, even before relocation, since the
586 * environment variable value is an integer and thus short.
588 const char *str = getenv(name);
590 return str ? simple_strtoul(str, NULL, base) : default_val;
593 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
595 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
597 extern char *env_name_spec;
599 printf("Saving Environment to %s...\n", env_name_spec);
601 return saveenv() ? 1 : 0;
605 saveenv, 1, 0, do_env_save,
606 "save environment variables to persistent storage",
614 * Match a name / name=value pair
616 * s1 is either a simple 'name', or a 'name=value' pair.
617 * i2 is the environment index for a 'name2=value2' pair.
618 * If the names match, return the index for the value2, else NULL.
621 int envmatch(uchar *s1, int i2)
623 while (*s1 == env_get_char(i2++))
626 if (*s1 == '\0' && env_get_char(i2-1) == '=')
631 static int do_env_default(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
633 if ((argc != 2) || (strcmp(argv[1], "-f") != 0))
634 return cmd_usage(cmdtp);
636 set_default_env("## Resetting to default environment\n");
640 static int do_env_delete(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
642 printf("Not implemented yet\n");
646 #ifdef CONFIG_CMD_EXPORTENV
648 * env export [-t | -b | -c] addr [size]
649 * -t: export as text format; if size is given, data will be
650 * padded with '\0' bytes; if not, one terminating '\0'
651 * will be added (which is included in the "filesize"
652 * setting so you can for exmple copy this to flash and
653 * keep the termination).
654 * -b: export as binary format (name=value pairs separated by
655 * '\0', list end marked by double "\0\0")
656 * -c: export as checksum protected environment format as
657 * used for example by "saveenv" command
658 * addr: memory address where environment gets stored
659 * size: size of output buffer
661 * With "-c" and size is NOT given, then the export command will
662 * format the data as currently used for the persistent storage,
663 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
664 * prepend a valid CRC32 checksum and, in case of resundant
665 * environment, a "current" redundancy flag. If size is given, this
666 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
667 * checksum and redundancy flag will be inserted.
669 * With "-b" and "-t", always only the real data (including a
670 * terminating '\0' byte) will be written; here the optional size
671 * argument will be used to make sure not to overflow the user
672 * provided buffer; the command will abort if the size is not
673 * sufficient. Any remainign space will be '\0' padded.
675 * On successful return, the variable "filesize" will be set.
676 * Note that filesize includes the trailing/terminating '\0' byte(s).
678 * Usage szenario: create a text snapshot/backup of the current settings:
680 * => env export -t 100000
681 * => era ${backup_addr} +${filesize}
682 * => cp.b 100000 ${backup_addr} ${filesize}
684 * Re-import this snapshot, deleting all other settings:
686 * => env import -d -t ${backup_addr}
688 static int do_env_export(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
691 char *addr, *cmd, *res;
701 while (--argc > 0 && **++argv == '-') {
705 case 'b': /* raw binary format */
710 case 'c': /* external checksum format */
716 case 't': /* text format */
722 return cmd_usage(cmdtp);
728 return cmd_usage(cmdtp);
730 addr = (char *)simple_strtoul(argv[0], NULL, 16);
733 size = simple_strtoul(argv[1], NULL, 16);
734 memset(addr, '\0', size);
739 if (sep) { /* export as text file */
740 len = hexport_r(&env_htab, sep, &addr, size);
742 error("Cannot export environment: errno = %d\n",
746 sprintf(buf, "%zX", (size_t)len);
747 setenv("filesize", buf);
752 envp = (env_t *)addr;
754 if (chk) /* export as checksum protected block */
755 res = (char *)envp->data;
756 else /* export as raw binary data */
759 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE);
761 error("Cannot export environment: errno = %d\n",
767 envp->crc = crc32(0, envp->data, ENV_SIZE);
768 #ifdef CONFIG_ENV_ADDR_REDUND
769 envp->flags = ACTIVE_FLAG;
772 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
773 setenv("filesize", buf);
778 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
784 #ifdef CONFIG_CMD_IMPORTENV
786 * env import [-d] [-t | -b | -c] addr [size]
787 * -d: delete existing environment before importing;
788 * otherwise overwrite / append to existion definitions
789 * -t: assume text format; either "size" must be given or the
790 * text data must be '\0' terminated
791 * -b: assume binary format ('\0' separated, "\0\0" terminated)
792 * -c: assume checksum protected environment format
793 * addr: memory address to read from
794 * size: length of input data; if missing, proper '\0'
795 * termination is mandatory
797 static int do_env_import(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
808 while (--argc > 0 && **++argv == '-') {
812 case 'b': /* raw binary format */
817 case 'c': /* external checksum format */
823 case 't': /* text format */
832 return cmd_usage(cmdtp);
838 return cmd_usage(cmdtp);
841 printf("## Warning: defaulting to text format\n");
843 addr = (char *)simple_strtoul(argv[0], NULL, 16);
846 size = simple_strtoul(argv[1], NULL, 16);
852 while (size < MAX_ENV_SIZE) {
853 if ((*s == sep) && (*(s+1) == '\0'))
858 if (size == MAX_ENV_SIZE) {
859 printf("## Warning: Input data exceeds %d bytes"
860 " - truncated\n", MAX_ENV_SIZE);
863 printf("## Info: input data size = %zd = 0x%zX\n", size, size);
868 env_t *ep = (env_t *)addr;
870 size -= offsetof(env_t, data);
871 memcpy(&crc, &ep->crc, sizeof(crc));
873 if (crc32(0, ep->data, size) != crc) {
874 puts("## Error: bad CRC, import failed\n");
877 addr = (char *)ep->data;
880 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR) == 0) {
881 error("Environment import failed: errno = %d\n", errno);
884 gd->flags |= GD_FLG_ENV_READY;
889 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
895 #if defined(CONFIG_CMD_RUN)
896 extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
900 * New command line interface: "env" command with subcommands
902 static cmd_tbl_t cmd_env_sub[] = {
903 #if defined(CONFIG_CMD_ASKENV)
904 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
906 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
907 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
908 #if defined(CONFIG_CMD_EDITENV)
909 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
911 #if defined(CONFIG_CMD_EXPORTENV)
912 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
914 #if defined(CONFIG_CMD_GREPENV)
915 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
917 #if defined(CONFIG_CMD_IMPORTENV)
918 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
920 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
921 #if defined(CONFIG_CMD_RUN)
922 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
924 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
925 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
927 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
930 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
933 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
937 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
942 return cmd_usage(cmdtp);
944 /* drop initial "env" arg */
948 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
951 return cp->cmd(cmdtp, flag, argc, argv);
953 return cmd_usage(cmdtp);
957 env, CONFIG_SYS_MAXARGS, 1, do_env,
958 "environment handling commands",
959 #if defined(CONFIG_CMD_ASKENV)
960 "ask name [message] [size] - ask for environment variable\nenv "
962 "default -f - reset default environment\n"
963 #if defined(CONFIG_CMD_EDITENV)
964 "env edit name - edit environment variable\n"
966 "env export [-t | -b | -c] addr [size] - export environment\n"
967 #if defined(CONFIG_CMD_GREPENV)
968 "env grep string [...] - search environment\n"
970 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
971 "env print [name ...] - print environment\n"
972 #if defined(CONFIG_CMD_RUN)
973 "env run var [...] - run commands in an environment variable\n"
975 "env save - save environment\n"
976 "env set [-f] name [arg ...]\n"
980 * Old command line interface, kept for compatibility
983 #if defined(CONFIG_CMD_EDITENV)
985 editenv, 2, 0, do_env_edit,
986 "edit environment variable",
988 " - edit environment variable 'name'",
994 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
995 "print environment variables",
996 "\n - print values of all environment variables\n"
997 "printenv name ...\n"
998 " - print value of environment variable 'name'",
1002 #ifdef CONFIG_CMD_GREPENV
1003 U_BOOT_CMD_COMPLETE(
1004 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1005 "search environment variables",
1007 " - list environment name=value pairs matching 'string'",
1012 U_BOOT_CMD_COMPLETE(
1013 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1014 "set environment variables",
1016 " - set environment variable 'name' to 'value ...'\n"
1018 " - delete environment variable 'name'",
1022 #if defined(CONFIG_CMD_ASKENV)
1025 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1026 "get environment variables from stdin",
1027 "name [message] [size]\n"
1028 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1030 " - get environment variable 'name' from stdin\n"
1031 "askenv name size\n"
1032 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1033 "askenv name [message] size\n"
1034 " - display 'message' string and get environment variable 'name'"
1035 "from stdin (max 'size' chars)"
1039 #if defined(CONFIG_CMD_RUN)
1040 U_BOOT_CMD_COMPLETE(
1041 run, CONFIG_SYS_MAXARGS, 1, do_run,
1042 "run commands in an environment variable",
1044 " - run the commands in the environment variable(s) 'var'",