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(char *varname
, char *varvalue
)
372 char * const argv
[4] = { "setenv", varname
, varvalue
, NULL
};
373 if ((varvalue
== NULL
) || (varvalue
[0] == '\0'))
374 return _do_env_set(0, 2, argv
);
376 return _do_env_set(0, 3, argv
);
379 int do_env_set(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
382 return cmd_usage(cmdtp
);
384 return _do_env_set(flag
, argc
, argv
);
388 * Prompt for environment variable
390 #if defined(CONFIG_CMD_ASKENV)
391 int do_env_ask(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
393 extern char console_buffer
[CONFIG_SYS_CBSIZE
];
394 char message
[CONFIG_SYS_CBSIZE
];
395 int size
= CONFIG_SYS_CBSIZE
- 1;
399 local_args
[0] = argv
[0];
400 local_args
[1] = argv
[1];
401 local_args
[2] = NULL
;
402 local_args
[3] = NULL
;
404 /* Check the syntax */
407 return cmd_usage(cmdtp
);
409 case 2: /* env_ask envname */
410 sprintf(message
, "Please enter '%s':", argv
[1]);
413 case 3: /* env_ask envname size */
414 sprintf(message
, "Please enter '%s':", argv
[1]);
415 size
= simple_strtoul(argv
[2], NULL
, 10);
418 default: /* env_ask envname message1 ... messagen size */
419 for (i
= 2, pos
= 0; i
< argc
- 1; i
++) {
421 message
[pos
++] = ' ';
423 strcpy(message
+pos
, argv
[i
]);
424 pos
+= strlen(argv
[i
]);
427 size
= simple_strtoul(argv
[argc
- 1], NULL
, 10);
431 if (size
>= CONFIG_SYS_CBSIZE
)
432 size
= CONFIG_SYS_CBSIZE
- 1;
437 /* prompt for input */
438 len
= readline(message
);
441 console_buffer
[size
] = '\0';
444 if (console_buffer
[0] != '\0') {
445 local_args
[2] = console_buffer
;
449 /* Continue calling setenv code */
450 return _do_env_set(flag
, len
, local_args
);
455 * Interactively edit an environment variable
457 #if defined(CONFIG_CMD_EDITENV)
458 int do_env_edit(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
460 char buffer
[CONFIG_SYS_CBSIZE
];
465 return cmd_usage(cmdtp
);
467 /* Set read buffer to initial value or empty sting */
468 init_val
= getenv(argv
[1]);
470 len
= sprintf(buffer
, "%s", init_val
);
474 readline_into_buffer("edit: ", buffer
);
476 return setenv(argv
[1], buffer
);
478 #endif /* CONFIG_CMD_EDITENV */
481 * Look up variable from environment,
482 * return address of storage for that variable,
483 * or NULL if not found
485 char *getenv(char *name
)
487 if (gd
->flags
& GD_FLG_ENV_READY
) { /* after import into hashtable */
494 hsearch_r(e
, FIND
, &ep
, &env_htab
);
496 return ep
? ep
->data
: NULL
;
499 /* restricted capabilities before import */
501 if (getenv_f(name
, (char *)(gd
->env_buf
), sizeof(gd
->env_buf
)) > 0)
502 return (char *)(gd
->env_buf
);
508 * Look up variable from environment for restricted C runtime env.
510 int getenv_f(char *name
, char *buf
, unsigned len
)
514 for (i
= 0; env_get_char(i
) != '\0'; i
= nxt
+1) {
517 for (nxt
= i
; env_get_char(nxt
) != '\0'; ++nxt
) {
518 if (nxt
>= CONFIG_ENV_SIZE
)
522 val
= envmatch((uchar
*)name
, i
);
526 /* found; copy out */
527 for (n
= 0; n
< len
; ++n
, ++buf
) {
528 if ((*buf
= env_get_char(val
++)) == '\0')
535 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
543 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
545 int do_env_save(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
547 extern char *env_name_spec
;
549 printf("Saving Environment to %s...\n", env_name_spec
);
551 return saveenv() ? 1 : 0;
555 saveenv
, 1, 0, do_env_save
,
556 "save environment variables to persistent storage",
564 * Match a name / name=value pair
566 * s1 is either a simple 'name', or a 'name=value' pair.
567 * i2 is the environment index for a 'name2=value2' pair.
568 * If the names match, return the index for the value2, else NULL.
571 int envmatch(uchar
*s1
, int i2
)
573 while (*s1
== env_get_char(i2
++))
576 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
581 static int do_env_default(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
583 if ((argc
!= 2) || (strcmp(argv
[1], "-f") != 0))
584 return cmd_usage(cmdtp
);
586 set_default_env("## Resetting to default environment\n");
590 static int do_env_delete(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
592 printf("Not implemented yet\n");
596 #ifdef CONFIG_CMD_EXPORTENV
598 * env export [-t | -b | -c] addr [size]
599 * -t: export as text format; if size is given, data will be
600 * padded with '\0' bytes; if not, one terminating '\0'
601 * will be added (which is included in the "filesize"
602 * setting so you can for exmple copy this to flash and
603 * keep the termination).
604 * -b: export as binary format (name=value pairs separated by
605 * '\0', list end marked by double "\0\0")
606 * -c: export as checksum protected environment format as
607 * used for example by "saveenv" command
608 * addr: memory address where environment gets stored
609 * size: size of output buffer
611 * With "-c" and size is NOT given, then the export command will
612 * format the data as currently used for the persistent storage,
613 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
614 * prepend a valid CRC32 checksum and, in case of resundant
615 * environment, a "current" redundancy flag. If size is given, this
616 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
617 * checksum and redundancy flag will be inserted.
619 * With "-b" and "-t", always only the real data (including a
620 * terminating '\0' byte) will be written; here the optional size
621 * argument will be used to make sure not to overflow the user
622 * provided buffer; the command will abort if the size is not
623 * sufficient. Any remainign space will be '\0' padded.
625 * On successful return, the variable "filesize" will be set.
626 * Note that filesize includes the trailing/terminating '\0' byte(s).
628 * Usage szenario: create a text snapshot/backup of the current settings:
630 * => env export -t 100000
631 * => era ${backup_addr} +${filesize}
632 * => cp.b 100000 ${backup_addr} ${filesize}
634 * Re-import this snapshot, deleting all other settings:
636 * => env import -d -t ${backup_addr}
638 static int do_env_export(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
641 char *addr
, *cmd
, *res
;
651 while (--argc
> 0 && **++argv
== '-') {
655 case 'b': /* raw binary format */
660 case 'c': /* external checksum format */
666 case 't': /* text format */
672 return cmd_usage(cmdtp
);
678 return cmd_usage(cmdtp
);
680 addr
= (char *)simple_strtoul(argv
[0], NULL
, 16);
683 size
= simple_strtoul(argv
[1], NULL
, 16);
684 memset(addr
, '\0', size
);
689 if (sep
) { /* export as text file */
690 len
= hexport_r(&env_htab
, sep
, &addr
, size
);
692 error("Cannot export environment: errno = %d\n",
696 sprintf(buf
, "%zX", (size_t)len
);
697 setenv("filesize", buf
);
702 envp
= (env_t
*)addr
;
704 if (chk
) /* export as checksum protected block */
705 res
= (char *)envp
->data
;
706 else /* export as raw binary data */
709 len
= hexport_r(&env_htab
, '\0', &res
, ENV_SIZE
);
711 error("Cannot export environment: errno = %d\n",
717 envp
->crc
= crc32(0, envp
->data
, ENV_SIZE
);
718 #ifdef CONFIG_ENV_ADDR_REDUND
719 envp
->flags
= ACTIVE_FLAG
;
722 sprintf(buf
, "%zX", (size_t)(len
+ offsetof(env_t
, data
)));
723 setenv("filesize", buf
);
728 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
734 #ifdef CONFIG_CMD_IMPORTENV
736 * env import [-d] [-t | -b | -c] addr [size]
737 * -d: delete existing environment before importing;
738 * otherwise overwrite / append to existion definitions
739 * -t: assume text format; either "size" must be given or the
740 * text data must be '\0' terminated
741 * -b: assume binary format ('\0' separated, "\0\0" terminated)
742 * -c: assume checksum protected environment format
743 * addr: memory address to read from
744 * size: length of input data; if missing, proper '\0'
745 * termination is mandatory
747 static int do_env_import(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
758 while (--argc
> 0 && **++argv
== '-') {
762 case 'b': /* raw binary format */
767 case 'c': /* external checksum format */
773 case 't': /* text format */
782 return cmd_usage(cmdtp
);
788 return cmd_usage(cmdtp
);
791 printf("## Warning: defaulting to text format\n");
793 addr
= (char *)simple_strtoul(argv
[0], NULL
, 16);
796 size
= simple_strtoul(argv
[1], NULL
, 16);
802 while (size
< MAX_ENV_SIZE
) {
803 if ((*s
== sep
) && (*(s
+1) == '\0'))
808 if (size
== MAX_ENV_SIZE
) {
809 printf("## Warning: Input data exceeds %d bytes"
810 " - truncated\n", MAX_ENV_SIZE
);
813 printf("## Info: input data size = %zd = 0x%zX\n", size
, size
);
818 env_t
*ep
= (env_t
*)addr
;
820 size
-= offsetof(env_t
, data
);
821 memcpy(&crc
, &ep
->crc
, sizeof(crc
));
823 if (crc32(0, ep
->data
, size
) != crc
) {
824 puts("## Error: bad CRC, import failed\n");
827 addr
= (char *)ep
->data
;
830 if (himport_r(&env_htab
, addr
, size
, sep
, del
? 0 : H_NOCLEAR
) == 0) {
831 error("Environment import failed: errno = %d\n", errno
);
834 gd
->flags
|= GD_FLG_ENV_READY
;
839 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
845 #if defined(CONFIG_CMD_RUN)
846 extern int do_run(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[]);
850 * New command line interface: "env" command with subcommands
852 static cmd_tbl_t cmd_env_sub
[] = {
853 #if defined(CONFIG_CMD_ASKENV)
854 U_BOOT_CMD_MKENT(ask
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
, "", ""),
856 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default
, "", ""),
857 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete
, "", ""),
858 #if defined(CONFIG_CMD_EDITENV)
859 U_BOOT_CMD_MKENT(edit
, 2, 0, do_env_edit
, "", ""),
861 #if defined(CONFIG_CMD_EXPORTENV)
862 U_BOOT_CMD_MKENT(export
, 4, 0, do_env_export
, "", ""),
864 #if defined(CONFIG_CMD_GREPENV)
865 U_BOOT_CMD_MKENT(grep
, CONFIG_SYS_MAXARGS
, 1, do_env_grep
, "", ""),
867 #if defined(CONFIG_CMD_IMPORTENV)
868 U_BOOT_CMD_MKENT(import
, 5, 0, do_env_import
, "", ""),
870 U_BOOT_CMD_MKENT(print
, CONFIG_SYS_MAXARGS
, 1, do_env_print
, "", ""),
871 #if defined(CONFIG_CMD_RUN)
872 U_BOOT_CMD_MKENT(run
, CONFIG_SYS_MAXARGS
, 1, do_run
, "", ""),
874 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
875 U_BOOT_CMD_MKENT(save
, 1, 0, do_env_save
, "", ""),
877 U_BOOT_CMD_MKENT(set
, CONFIG_SYS_MAXARGS
, 0, do_env_set
, "", ""),
880 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
883 fixup_cmdtable(cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
887 static int do_env(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
892 return cmd_usage(cmdtp
);
894 /* drop initial "env" arg */
898 cp
= find_cmd_tbl(argv
[0], cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
901 return cp
->cmd(cmdtp
, flag
, argc
, argv
);
903 return cmd_usage(cmdtp
);
907 env
, CONFIG_SYS_MAXARGS
, 1, do_env
,
908 "environment handling commands",
909 #if defined(CONFIG_CMD_ASKENV)
910 "ask name [message] [size] - ask for environment variable\nenv "
912 "default -f - reset default environment\n"
913 #if defined(CONFIG_CMD_EDITENV)
914 "env edit name - edit environment variable\n"
916 "env export [-t | -b | -c] addr [size] - export environment\n"
917 #if defined(CONFIG_CMD_GREPENV)
918 "env grep string [...] - search environment\n"
920 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
921 "env print [name ...] - print environment\n"
922 #if defined(CONFIG_CMD_RUN)
923 "env run var [...] - run commands in an environment variable\n"
925 "env save - save environment\n"
926 "env set [-f] name [arg ...]\n"
930 * Old command line interface, kept for compatibility
933 #if defined(CONFIG_CMD_EDITENV)
935 editenv
, 2, 0, do_env_edit
,
936 "edit environment variable",
938 " - edit environment variable 'name'",
944 printenv
, CONFIG_SYS_MAXARGS
, 1, do_env_print
,
945 "print environment variables",
946 "\n - print values of all environment variables\n"
947 "printenv name ...\n"
948 " - print value of environment variable 'name'",
952 #ifdef CONFIG_CMD_GREPENV
954 grepenv
, CONFIG_SYS_MAXARGS
, 0, do_env_grep
,
955 "search environment variables",
957 " - list environment name=value pairs matching 'string'",
963 setenv
, CONFIG_SYS_MAXARGS
, 0, do_env_set
,
964 "set environment variables",
966 " - set environment variable 'name' to 'value ...'\n"
968 " - delete environment variable 'name'",
972 #if defined(CONFIG_CMD_ASKENV)
975 askenv
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
,
976 "get environment variables from stdin",
977 "name [message] [size]\n"
978 " - get environment variable 'name' from stdin (max 'size' chars)\n"
980 " - get environment variable 'name' from stdin\n"
982 " - get environment variable 'name' from stdin (max 'size' chars)\n"
983 "askenv name [message] size\n"
984 " - display 'message' string and get environment variable 'name'"
985 "from stdin (max 'size' chars)"
989 #if defined(CONFIG_CMD_RUN)
991 run
, CONFIG_SYS_MAXARGS
, 1, do_run
,
992 "run commands in an environment variable",
994 " - run the commands in the environment variable(s) 'var'",