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_FAT) && \
65 !defined(CONFIG_ENV_IS_IN_NAND) && \
66 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
67 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
68 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
69 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
70 !defined(CONFIG_ENV_IS_NOWHERE)
71 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
72 SPI_FLASH|MG_DISK|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
76 #define MK_STR(x) XMK_STR(x)
79 * Maximum expected input data size for import command
81 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
83 ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
84 ulong save_addr; /* Default Save Address */
85 ulong save_size; /* Default Save Size (in bytes) */
88 * Table with supported baudrates (defined in config_xyz.h)
90 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
91 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
94 * This variable is incremented on each do_env_set(), so it can
95 * be used via get_env_id() as an indication, if the environment
96 * has changed or not. So it is possible to reread an environment
97 * variable only if the environment was changed ... done so for
98 * example in NetInitLoop()
100 static int env_id = 1;
108 * Command interface: print one or all environment variables
110 * Returns 0 in case of error, or length of printed string
112 static int env_print(char *name)
117 if (name) { /* print a single name */
122 hsearch_r(e, FIND, &ep, &env_htab);
125 len = printf("%s=%s\n", ep->key, ep->data);
129 /* print whole list */
130 len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);
138 /* should never happen */
142 int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
148 /* print all env vars */
149 rcode = env_print(NULL);
152 printf("\nEnvironment size: %d/%ld bytes\n",
153 rcode, (ulong)ENV_SIZE);
157 /* print selected env vars */
158 for (i = 1; i < argc; ++i) {
159 int rc = env_print(argv[i]);
161 printf("## Error: \"%s\" not defined\n", argv[i]);
169 #ifdef CONFIG_CMD_GREPENV
170 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
171 int argc, char * const argv[])
174 unsigned char matched[env_htab.size / 8];
175 int rcode = 1, arg = 1, idx;
178 return CMD_RET_USAGE;
180 memset(matched, 0, env_htab.size / 8);
182 while (arg <= argc) {
184 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
185 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
191 matched[idx / 8] |= 1 << (idx & 7);
202 * Set a new environment variable,
203 * or replace or delete an existing one.
205 int _do_env_set(int flag, int argc, char * const argv[])
210 char *name, *value, *s;
215 if (strchr(name, '=')) {
216 printf("## Error: illegal character '=' in variable name"
223 * search if variable with this name already exists
227 hsearch_r(e, FIND, &ep, &env_htab);
229 /* Check for console redirection */
230 if (strcmp(name, "stdin") == 0)
232 else if (strcmp(name, "stdout") == 0)
234 else if (strcmp(name, "stderr") == 0)
238 if (argc < 3) { /* Cannot delete it! */
239 printf("Can't delete \"%s\"\n", name);
243 #ifdef CONFIG_CONSOLE_MUX
244 i = iomux_doenv(console, argv[2]);
248 /* Try assigning specified device */
249 if (console_assign(console, argv[2]) < 0)
252 #ifdef CONFIG_SERIAL_MULTI
253 if (serial_assign(argv[2]) < 0)
256 #endif /* CONFIG_CONSOLE_MUX */
260 * Some variables like "ethaddr" and "serial#" can be set only
261 * once and cannot be deleted; also, "ver" is readonly.
263 if (ep) { /* variable exists */
264 #ifndef CONFIG_ENV_OVERWRITE
265 if (strcmp(name, "serial#") == 0 ||
266 (strcmp(name, "ethaddr") == 0
267 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
268 && strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
269 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
271 printf("Can't overwrite \"%s\"\n", name);
276 * Switch to new baudrate if new baudrate is supported
278 if (strcmp(name, "baudrate") == 0) {
279 int baudrate = simple_strtoul(argv[2], NULL, 10);
281 for (i = 0; i < N_BAUDRATES; ++i) {
282 if (baudrate == baudrate_table[i])
285 if (i == N_BAUDRATES) {
286 printf("## Baudrate %d bps not supported\n",
290 printf("## Switch baudrate to %d bps and"
291 "press ENTER ...\n", baudrate);
293 gd->baudrate = baudrate;
294 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
295 gd->bd->bi_baudrate = baudrate;
300 while (getc() != '\r')
306 if (argc < 3 || argv[2] == NULL) {
307 int rc = hdelete_r(name, &env_htab);
312 * Insert / replace new value
314 for (i = 2, len = 0; i < argc; ++i)
315 len += strlen(argv[i]) + 1;
319 printf("## Can't malloc %d bytes\n", len);
322 for (i = 2, s = value; i < argc; ++i) {
325 while ((*s++ = *v++) != '\0')
334 hsearch_r(e, ENTER, &ep, &env_htab);
337 printf("## Error inserting \"%s\" variable, errno=%d\n",
343 * Some variables should be updated when the corresponding
344 * entry in the environment is changed
346 if (strcmp(argv[1], "loadaddr") == 0) {
347 load_addr = simple_strtoul(argv[2], NULL, 16);
350 #if defined(CONFIG_CMD_NET)
351 else if (strcmp(argv[1], "bootfile") == 0) {
352 copy_filename(BootFile, argv[2], sizeof(BootFile));
359 int setenv(const char *varname, const char *varvalue)
361 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
363 if (varvalue == NULL || varvalue[0] == '\0')
364 return _do_env_set(0, 2, (char * const *)argv);
366 return _do_env_set(0, 3, (char * const *)argv);
370 * Set an environment variable to an integer value
372 * @param varname Environmet variable to set
373 * @param value Value to set it to
374 * @return 0 if ok, 1 on error
376 int setenv_ulong(const char *varname, ulong value)
378 /* TODO: this should be unsigned */
379 char *str = simple_itoa(value);
381 return setenv(varname, str);
385 * Set an environment variable to an address in hex
387 * @param varname Environmet variable to set
388 * @param addr Value to set it to
389 * @return 0 if ok, 1 on error
391 int setenv_addr(const char *varname, const void *addr)
395 sprintf(str, "%lx", (uintptr_t)addr);
396 return setenv(varname, str);
399 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
402 return CMD_RET_USAGE;
404 return _do_env_set(flag, argc, argv);
408 * Prompt for environment variable
410 #if defined(CONFIG_CMD_ASKENV)
411 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
413 char message[CONFIG_SYS_CBSIZE];
414 int size = CONFIG_SYS_CBSIZE - 1;
418 local_args[0] = argv[0];
419 local_args[1] = argv[1];
420 local_args[2] = NULL;
421 local_args[3] = NULL;
423 /* Check the syntax */
426 return CMD_RET_USAGE;
428 case 2: /* env_ask envname */
429 sprintf(message, "Please enter '%s':", argv[1]);
432 case 3: /* env_ask envname size */
433 sprintf(message, "Please enter '%s':", argv[1]);
434 size = simple_strtoul(argv[2], NULL, 10);
437 default: /* env_ask envname message1 ... messagen size */
438 for (i = 2, pos = 0; i < argc - 1; i++) {
440 message[pos++] = ' ';
442 strcpy(message + pos, argv[i]);
443 pos += strlen(argv[i]);
447 size = simple_strtoul(argv[argc - 1], NULL, 10);
451 if (size >= CONFIG_SYS_CBSIZE)
452 size = CONFIG_SYS_CBSIZE - 1;
457 /* prompt for input */
458 len = readline(message);
461 console_buffer[size] = '\0';
464 if (console_buffer[0] != '\0') {
465 local_args[2] = console_buffer;
469 /* Continue calling setenv code */
470 return _do_env_set(flag, len, local_args);
475 * Interactively edit an environment variable
477 #if defined(CONFIG_CMD_EDITENV)
478 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
480 char buffer[CONFIG_SYS_CBSIZE];
484 return CMD_RET_USAGE;
486 /* Set read buffer to initial value or empty sting */
487 init_val = getenv(argv[1]);
489 sprintf(buffer, "%s", init_val);
493 readline_into_buffer("edit: ", buffer, 0);
495 return setenv(argv[1], buffer);
497 #endif /* CONFIG_CMD_EDITENV */
500 * Look up variable from environment,
501 * return address of storage for that variable,
502 * or NULL if not found
504 char *getenv(const char *name)
506 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
513 hsearch_r(e, FIND, &ep, &env_htab);
515 return ep ? ep->data : NULL;
518 /* restricted capabilities before import */
519 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
520 return (char *)(gd->env_buf);
526 * Look up variable from environment for restricted C runtime env.
528 int getenv_f(const char *name, char *buf, unsigned len)
532 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
535 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
536 if (nxt >= CONFIG_ENV_SIZE)
540 val = envmatch((uchar *)name, i);
544 /* found; copy out */
545 for (n = 0; n < len; ++n, ++buf) {
546 *buf = env_get_char(val++);
554 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
564 * Decode the integer value of an environment variable and return it.
566 * @param name Name of environemnt variable
567 * @param base Number base to use (normally 10, or 16 for hex)
568 * @param default_val Default value to return if the variable is not
570 * @return the decoded value, or default_val if not found
572 ulong getenv_ulong(const char *name, int base, ulong default_val)
575 * We can use getenv() here, even before relocation, since the
576 * environment variable value is an integer and thus short.
578 const char *str = getenv(name);
580 return str ? simple_strtoul(str, NULL, base) : default_val;
583 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
584 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
586 printf("Saving Environment to %s...\n", env_name_spec);
588 return saveenv() ? 1 : 0;
592 saveenv, 1, 0, do_env_save,
593 "save environment variables to persistent storage",
600 * Match a name / name=value pair
602 * s1 is either a simple 'name', or a 'name=value' pair.
603 * i2 is the environment index for a 'name2=value2' pair.
604 * If the names match, return the index for the value2, else -1.
606 int envmatch(uchar *s1, int i2)
608 while (*s1 == env_get_char(i2++))
612 if (*s1 == '\0' && env_get_char(i2-1) == '=')
618 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
619 int argc, char * const argv[])
621 if (argc != 2 || strcmp(argv[1], "-f") != 0)
622 return CMD_RET_USAGE;
624 set_default_env("## Resetting to default environment\n");
628 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
629 int argc, char * const argv[])
631 printf("Not implemented yet\n");
635 #ifdef CONFIG_CMD_EXPORTENV
637 * env export [-t | -b | -c] [-s size] addr [var ...]
638 * -t: export as text format; if size is given, data will be
639 * padded with '\0' bytes; if not, one terminating '\0'
640 * will be added (which is included in the "filesize"
641 * setting so you can for exmple copy this to flash and
642 * keep the termination).
643 * -b: export as binary format (name=value pairs separated by
644 * '\0', list end marked by double "\0\0")
645 * -c: export as checksum protected environment format as
646 * used for example by "saveenv" command
648 * size of output buffer
649 * addr: memory address where environment gets stored
650 * var... List of variable names that get included into the
651 * export. Without arguments, the whole environment gets
654 * With "-c" and size is NOT given, then the export command will
655 * format the data as currently used for the persistent storage,
656 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
657 * prepend a valid CRC32 checksum and, in case of resundant
658 * environment, a "current" redundancy flag. If size is given, this
659 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
660 * checksum and redundancy flag will be inserted.
662 * With "-b" and "-t", always only the real data (including a
663 * terminating '\0' byte) will be written; here the optional size
664 * argument will be used to make sure not to overflow the user
665 * provided buffer; the command will abort if the size is not
666 * sufficient. Any remainign space will be '\0' padded.
668 * On successful return, the variable "filesize" will be set.
669 * Note that filesize includes the trailing/terminating '\0' byte(s).
671 * Usage szenario: create a text snapshot/backup of the current settings:
673 * => env export -t 100000
674 * => era ${backup_addr} +${filesize}
675 * => cp.b 100000 ${backup_addr} ${filesize}
677 * Re-import this snapshot, deleting all other settings:
679 * => env import -d -t ${backup_addr}
681 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
682 int argc, char * const argv[])
685 char *addr, *cmd, *res;
695 while (--argc > 0 && **++argv == '-') {
699 case 'b': /* raw binary format */
704 case 'c': /* external checksum format */
710 case 's': /* size given */
712 return cmd_usage(cmdtp);
713 size = simple_strtoul(*++argv, NULL, 16);
715 case 't': /* text format */
721 return CMD_RET_USAGE;
728 return CMD_RET_USAGE;
730 addr = (char *)simple_strtoul(argv[0], NULL, 16);
733 memset(addr, '\0', size);
738 if (sep) { /* export as text file */
739 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
741 error("Cannot export environment: errno = %d\n", errno);
744 sprintf(buf, "%zX", (size_t)len);
745 setenv("filesize", buf);
750 envp = (env_t *)addr;
752 if (chk) /* export as checksum protected block */
753 res = (char *)envp->data;
754 else /* export as raw binary data */
757 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
759 error("Cannot export environment: errno = %d\n", errno);
764 envp->crc = crc32(0, envp->data, ENV_SIZE);
765 #ifdef CONFIG_ENV_ADDR_REDUND
766 envp->flags = ACTIVE_FLAG;
769 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
770 setenv("filesize", buf);
775 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
780 #ifdef CONFIG_CMD_IMPORTENV
782 * env import [-d] [-t | -b | -c] addr [size]
783 * -d: delete existing environment before importing;
784 * otherwise overwrite / append to existion definitions
785 * -t: assume text format; either "size" must be given or the
786 * text data must be '\0' terminated
787 * -b: assume binary format ('\0' separated, "\0\0" terminated)
788 * -c: assume checksum protected environment format
789 * addr: memory address to read from
790 * size: length of input data; if missing, proper '\0'
791 * termination is mandatory
793 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
794 int argc, char * const argv[])
805 while (--argc > 0 && **++argv == '-') {
809 case 'b': /* raw binary format */
814 case 'c': /* external checksum format */
820 case 't': /* text format */
829 return CMD_RET_USAGE;
835 return CMD_RET_USAGE;
838 printf("## Warning: defaulting to text format\n");
840 addr = (char *)simple_strtoul(argv[0], NULL, 16);
843 size = simple_strtoul(argv[1], NULL, 16);
849 while (size < MAX_ENV_SIZE) {
850 if ((*s == sep) && (*(s+1) == '\0'))
855 if (size == MAX_ENV_SIZE) {
856 printf("## Warning: Input data exceeds %d bytes"
857 " - truncated\n", MAX_ENV_SIZE);
860 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
865 env_t *ep = (env_t *)addr;
867 size -= offsetof(env_t, data);
868 memcpy(&crc, &ep->crc, sizeof(crc));
870 if (crc32(0, ep->data, size) != crc) {
871 puts("## Error: bad CRC, import failed\n");
874 addr = (char *)ep->data;
877 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR) == 0) {
878 error("Environment import failed: errno = %d\n", errno);
881 gd->flags |= GD_FLG_ENV_READY;
886 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
893 * New command line interface: "env" command with subcommands
895 static cmd_tbl_t cmd_env_sub[] = {
896 #if defined(CONFIG_CMD_ASKENV)
897 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
899 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
900 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
901 #if defined(CONFIG_CMD_EDITENV)
902 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
904 #if defined(CONFIG_CMD_EXPORTENV)
905 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
907 #if defined(CONFIG_CMD_GREPENV)
908 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
910 #if defined(CONFIG_CMD_IMPORTENV)
911 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
913 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
914 #if defined(CONFIG_CMD_RUN)
915 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
917 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
918 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
920 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
923 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
926 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
930 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
935 return CMD_RET_USAGE;
937 /* drop initial "env" arg */
941 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
944 return cp->cmd(cmdtp, flag, argc, argv);
946 return CMD_RET_USAGE;
950 env, CONFIG_SYS_MAXARGS, 1, do_env,
951 "environment handling commands",
952 #if defined(CONFIG_CMD_ASKENV)
953 "ask name [message] [size] - ask for environment variable\nenv "
955 "default -f - reset default environment\n"
956 #if defined(CONFIG_CMD_EDITENV)
957 "env edit name - edit environment variable\n"
959 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
960 #if defined(CONFIG_CMD_GREPENV)
961 "env grep string [...] - search environment\n"
963 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
964 "env print [name ...] - print environment\n"
965 #if defined(CONFIG_CMD_RUN)
966 "env run var [...] - run commands in an environment variable\n"
968 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
969 "env save - save environment\n"
971 "env set [-f] name [arg ...]\n"
975 * Old command line interface, kept for compatibility
978 #if defined(CONFIG_CMD_EDITENV)
980 editenv, 2, 0, do_env_edit,
981 "edit environment variable",
983 " - edit environment variable 'name'",
989 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
990 "print environment variables",
991 "\n - print values of all environment variables\n"
992 "printenv name ...\n"
993 " - print value of environment variable 'name'",
997 #ifdef CONFIG_CMD_GREPENV
999 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1000 "search environment variables",
1002 " - list environment name=value pairs matching 'string'",
1007 U_BOOT_CMD_COMPLETE(
1008 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1009 "set environment variables",
1011 " - set environment variable 'name' to 'value ...'\n"
1013 " - delete environment variable 'name'",
1017 #if defined(CONFIG_CMD_ASKENV)
1020 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1021 "get environment variables from stdin",
1022 "name [message] [size]\n"
1023 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1025 " - get environment variable 'name' from stdin\n"
1026 "askenv name size\n"
1027 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1028 "askenv name [message] size\n"
1029 " - display 'message' string and get environment variable 'name'"
1030 "from stdin (max 'size' chars)"
1034 #if defined(CONFIG_CMD_RUN)
1035 U_BOOT_CMD_COMPLETE(
1036 run, CONFIG_SYS_MAXARGS, 1, do_run,
1037 "run commands in an environment variable",
1039 " - run the commands in the environment variable(s) 'var'",