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_MMC) && \
63 !defined(CONFIG_ENV_IS_IN_FAT) && \
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_IN_REMOTE) && \
69 !defined(CONFIG_ENV_IS_NOWHERE)
70 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
71 SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
75 #define MK_STR(x) XMK_STR(x)
78 * Maximum expected input data size for import command
80 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
82 ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
83 ulong save_addr; /* Default Save Address */
84 ulong save_size; /* Default Save Size (in bytes) */
87 * Table with supported baudrates (defined in config_xyz.h)
89 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
90 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
93 * This variable is incremented on each do_env_set(), so it can
94 * be used via get_env_id() as an indication, if the environment
95 * has changed or not. So it is possible to reread an environment
96 * variable only if the environment was changed ... done so for
97 * example in NetInitLoop()
99 static int env_id = 1;
107 * Command interface: print one or all environment variables
109 * Returns 0 in case of error, or length of printed string
111 static int env_print(char *name)
116 if (name) { /* print a single name */
121 hsearch_r(e, FIND, &ep, &env_htab);
124 len = printf("%s=%s\n", ep->key, ep->data);
128 /* print whole list */
129 len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);
137 /* should never happen */
141 int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
147 /* print all env vars */
148 rcode = env_print(NULL);
151 printf("\nEnvironment size: %d/%ld bytes\n",
152 rcode, (ulong)ENV_SIZE);
156 /* print selected env vars */
157 for (i = 1; i < argc; ++i) {
158 int rc = env_print(argv[i]);
160 printf("## Error: \"%s\" not defined\n", argv[i]);
168 #ifdef CONFIG_CMD_GREPENV
169 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
170 int argc, char * const argv[])
173 unsigned char matched[env_htab.size / 8];
174 int rcode = 1, arg = 1, idx;
177 return CMD_RET_USAGE;
179 memset(matched, 0, env_htab.size / 8);
181 while (arg <= argc) {
183 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
184 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
190 matched[idx / 8] |= 1 << (idx & 7);
201 * Set a new environment variable,
202 * or replace or delete an existing one.
204 int _do_env_set(int flag, int argc, char * const argv[])
208 char *name, *value, *s;
213 if (strchr(name, '=')) {
214 printf("## Error: illegal character '=' in variable name"
221 * search if variable with this name already exists
225 hsearch_r(e, FIND, &ep, &env_htab);
227 /* Check for console redirection */
228 if (strcmp(name, "stdin") == 0)
230 else if (strcmp(name, "stdout") == 0)
232 else if (strcmp(name, "stderr") == 0)
236 if (argc < 3) { /* Cannot delete it! */
237 printf("Can't delete \"%s\"\n", name);
241 #ifdef CONFIG_CONSOLE_MUX
242 if (iomux_doenv(console, argv[2]))
245 /* Try assigning specified device */
246 if (console_assign(console, argv[2]) < 0)
249 #ifdef CONFIG_SERIAL_MULTI
250 if (serial_assign(argv[2]) < 0)
253 #endif /* CONFIG_CONSOLE_MUX */
257 * Some variables like "ethaddr" and "serial#" can be set only
258 * once and cannot be deleted; also, "ver" is readonly.
260 if (ep) { /* variable exists */
261 #ifndef CONFIG_ENV_OVERWRITE
262 if (strcmp(name, "serial#") == 0 ||
263 (strcmp(name, "ethaddr") == 0
264 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
265 && strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
266 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
268 printf("Can't overwrite \"%s\"\n", name);
273 * Switch to new baudrate if new baudrate is supported
275 if (strcmp(name, "baudrate") == 0) {
276 int baudrate = simple_strtoul(argv[2], NULL, 10);
278 for (i = 0; i < N_BAUDRATES; ++i) {
279 if (baudrate == baudrate_table[i])
282 if (i == N_BAUDRATES) {
283 printf("## Baudrate %d bps not supported\n",
287 printf("## Switch baudrate to %d bps and"
288 "press ENTER ...\n", baudrate);
290 gd->baudrate = baudrate;
291 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
292 gd->bd->bi_baudrate = baudrate;
297 while (getc() != '\r')
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
343 if (strcmp(argv[1], "loadaddr") == 0) {
344 load_addr = simple_strtoul(argv[2], NULL, 16);
347 #if defined(CONFIG_CMD_NET)
348 else if (strcmp(argv[1], "bootfile") == 0) {
349 copy_filename(BootFile, argv[2], sizeof(BootFile));
356 int setenv(const char *varname, const char *varvalue)
358 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
360 if (varvalue == NULL || varvalue[0] == '\0')
361 return _do_env_set(0, 2, (char * const *)argv);
363 return _do_env_set(0, 3, (char * const *)argv);
367 * Set an environment variable to an integer value
369 * @param varname Environmet variable to set
370 * @param value Value to set it to
371 * @return 0 if ok, 1 on error
373 int setenv_ulong(const char *varname, ulong value)
375 /* TODO: this should be unsigned */
376 char *str = simple_itoa(value);
378 return setenv(varname, str);
382 * Set an environment variable to an address in hex
384 * @param varname Environmet variable to set
385 * @param addr Value to set it to
386 * @return 0 if ok, 1 on error
388 int setenv_addr(const char *varname, const void *addr)
392 sprintf(str, "%lx", (uintptr_t)addr);
393 return setenv(varname, str);
396 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
399 return CMD_RET_USAGE;
401 return _do_env_set(flag, argc, argv);
405 * Prompt for environment variable
407 #if defined(CONFIG_CMD_ASKENV)
408 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
410 char message[CONFIG_SYS_CBSIZE];
411 int size = CONFIG_SYS_CBSIZE - 1;
415 local_args[0] = argv[0];
416 local_args[1] = argv[1];
417 local_args[2] = NULL;
418 local_args[3] = NULL;
420 /* Check the syntax */
423 return CMD_RET_USAGE;
425 case 2: /* env_ask envname */
426 sprintf(message, "Please enter '%s':", argv[1]);
429 case 3: /* env_ask envname size */
430 sprintf(message, "Please enter '%s':", argv[1]);
431 size = simple_strtoul(argv[2], NULL, 10);
434 default: /* env_ask envname message1 ... messagen size */
435 for (i = 2, pos = 0; i < argc - 1; i++) {
437 message[pos++] = ' ';
439 strcpy(message + pos, argv[i]);
440 pos += strlen(argv[i]);
444 size = simple_strtoul(argv[argc - 1], NULL, 10);
448 if (size >= CONFIG_SYS_CBSIZE)
449 size = CONFIG_SYS_CBSIZE - 1;
454 /* prompt for input */
455 len = readline(message);
458 console_buffer[size] = '\0';
461 if (console_buffer[0] != '\0') {
462 local_args[2] = console_buffer;
466 /* Continue calling setenv code */
467 return _do_env_set(flag, len, local_args);
472 * Interactively edit an environment variable
474 #if defined(CONFIG_CMD_EDITENV)
475 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
477 char buffer[CONFIG_SYS_CBSIZE];
481 return CMD_RET_USAGE;
483 /* Set read buffer to initial value or empty sting */
484 init_val = getenv(argv[1]);
486 sprintf(buffer, "%s", init_val);
490 readline_into_buffer("edit: ", buffer, 0);
492 return setenv(argv[1], buffer);
494 #endif /* CONFIG_CMD_EDITENV */
497 * Look up variable from environment,
498 * return address of storage for that variable,
499 * or NULL if not found
501 char *getenv(const char *name)
503 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
510 hsearch_r(e, FIND, &ep, &env_htab);
512 return ep ? ep->data : NULL;
515 /* restricted capabilities before import */
516 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
517 return (char *)(gd->env_buf);
523 * Look up variable from environment for restricted C runtime env.
525 int getenv_f(const char *name, char *buf, unsigned len)
529 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
532 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
533 if (nxt >= CONFIG_ENV_SIZE)
537 val = envmatch((uchar *)name, i);
541 /* found; copy out */
542 for (n = 0; n < len; ++n, ++buf) {
543 *buf = env_get_char(val++);
551 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
561 * Decode the integer value of an environment variable and return it.
563 * @param name Name of environemnt variable
564 * @param base Number base to use (normally 10, or 16 for hex)
565 * @param default_val Default value to return if the variable is not
567 * @return the decoded value, or default_val if not found
569 ulong getenv_ulong(const char *name, int base, ulong default_val)
572 * We can use getenv() here, even before relocation, since the
573 * environment variable value is an integer and thus short.
575 const char *str = getenv(name);
577 return str ? simple_strtoul(str, NULL, base) : default_val;
580 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
581 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
583 printf("Saving Environment to %s...\n", env_name_spec);
585 return saveenv() ? 1 : 0;
589 saveenv, 1, 0, do_env_save,
590 "save environment variables to persistent storage",
597 * Match a name / name=value pair
599 * s1 is either a simple 'name', or a 'name=value' pair.
600 * i2 is the environment index for a 'name2=value2' pair.
601 * If the names match, return the index for the value2, else -1.
603 int envmatch(uchar *s1, int i2)
605 while (*s1 == env_get_char(i2++))
609 if (*s1 == '\0' && env_get_char(i2-1) == '=')
615 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
616 int argc, char * const argv[])
618 if (argc != 2 || strcmp(argv[1], "-f") != 0)
619 return CMD_RET_USAGE;
621 set_default_env("## Resetting to default environment\n");
625 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
626 int argc, char * const argv[])
628 printf("Not implemented yet\n");
632 #ifdef CONFIG_CMD_EXPORTENV
634 * env export [-t | -b | -c] [-s size] addr [var ...]
635 * -t: export as text format; if size is given, data will be
636 * padded with '\0' bytes; if not, one terminating '\0'
637 * will be added (which is included in the "filesize"
638 * setting so you can for exmple copy this to flash and
639 * keep the termination).
640 * -b: export as binary format (name=value pairs separated by
641 * '\0', list end marked by double "\0\0")
642 * -c: export as checksum protected environment format as
643 * used for example by "saveenv" command
645 * size of output buffer
646 * addr: memory address where environment gets stored
647 * var... List of variable names that get included into the
648 * export. Without arguments, the whole environment gets
651 * With "-c" and size is NOT given, then the export command will
652 * format the data as currently used for the persistent storage,
653 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
654 * prepend a valid CRC32 checksum and, in case of resundant
655 * environment, a "current" redundancy flag. If size is given, this
656 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
657 * checksum and redundancy flag will be inserted.
659 * With "-b" and "-t", always only the real data (including a
660 * terminating '\0' byte) will be written; here the optional size
661 * argument will be used to make sure not to overflow the user
662 * provided buffer; the command will abort if the size is not
663 * sufficient. Any remainign space will be '\0' padded.
665 * On successful return, the variable "filesize" will be set.
666 * Note that filesize includes the trailing/terminating '\0' byte(s).
668 * Usage szenario: create a text snapshot/backup of the current settings:
670 * => env export -t 100000
671 * => era ${backup_addr} +${filesize}
672 * => cp.b 100000 ${backup_addr} ${filesize}
674 * Re-import this snapshot, deleting all other settings:
676 * => env import -d -t ${backup_addr}
678 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
679 int argc, char * const argv[])
682 char *addr, *cmd, *res;
692 while (--argc > 0 && **++argv == '-') {
696 case 'b': /* raw binary format */
701 case 'c': /* external checksum format */
707 case 's': /* size given */
709 return cmd_usage(cmdtp);
710 size = simple_strtoul(*++argv, NULL, 16);
712 case 't': /* text format */
718 return CMD_RET_USAGE;
725 return CMD_RET_USAGE;
727 addr = (char *)simple_strtoul(argv[0], NULL, 16);
730 memset(addr, '\0', size);
735 if (sep) { /* export as text file */
736 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
738 error("Cannot export environment: errno = %d\n", errno);
741 sprintf(buf, "%zX", (size_t)len);
742 setenv("filesize", buf);
747 envp = (env_t *)addr;
749 if (chk) /* export as checksum protected block */
750 res = (char *)envp->data;
751 else /* export as raw binary data */
754 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
756 error("Cannot export environment: errno = %d\n", errno);
761 envp->crc = crc32(0, envp->data, ENV_SIZE);
762 #ifdef CONFIG_ENV_ADDR_REDUND
763 envp->flags = ACTIVE_FLAG;
766 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
767 setenv("filesize", buf);
772 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
777 #ifdef CONFIG_CMD_IMPORTENV
779 * env import [-d] [-t | -b | -c] addr [size]
780 * -d: delete existing environment before importing;
781 * otherwise overwrite / append to existion definitions
782 * -t: assume text format; either "size" must be given or the
783 * text data must be '\0' terminated
784 * -b: assume binary format ('\0' separated, "\0\0" terminated)
785 * -c: assume checksum protected environment format
786 * addr: memory address to read from
787 * size: length of input data; if missing, proper '\0'
788 * termination is mandatory
790 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
791 int argc, char * const argv[])
802 while (--argc > 0 && **++argv == '-') {
806 case 'b': /* raw binary format */
811 case 'c': /* external checksum format */
817 case 't': /* text format */
826 return CMD_RET_USAGE;
832 return CMD_RET_USAGE;
835 printf("## Warning: defaulting to text format\n");
837 addr = (char *)simple_strtoul(argv[0], NULL, 16);
840 size = simple_strtoul(argv[1], NULL, 16);
846 while (size < MAX_ENV_SIZE) {
847 if ((*s == sep) && (*(s+1) == '\0'))
852 if (size == MAX_ENV_SIZE) {
853 printf("## Warning: Input data exceeds %d bytes"
854 " - truncated\n", MAX_ENV_SIZE);
857 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
862 env_t *ep = (env_t *)addr;
864 size -= offsetof(env_t, data);
865 memcpy(&crc, &ep->crc, sizeof(crc));
867 if (crc32(0, ep->data, size) != crc) {
868 puts("## Error: bad CRC, import failed\n");
871 addr = (char *)ep->data;
874 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR) == 0) {
875 error("Environment import failed: errno = %d\n", errno);
878 gd->flags |= GD_FLG_ENV_READY;
883 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
890 * New command line interface: "env" command with subcommands
892 static cmd_tbl_t cmd_env_sub[] = {
893 #if defined(CONFIG_CMD_ASKENV)
894 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
896 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
897 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
898 #if defined(CONFIG_CMD_EDITENV)
899 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
901 #if defined(CONFIG_CMD_EXPORTENV)
902 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
904 #if defined(CONFIG_CMD_GREPENV)
905 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
907 #if defined(CONFIG_CMD_IMPORTENV)
908 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
910 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
911 #if defined(CONFIG_CMD_RUN)
912 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
914 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
915 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
917 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
920 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
923 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
927 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
932 return CMD_RET_USAGE;
934 /* drop initial "env" arg */
938 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
941 return cp->cmd(cmdtp, flag, argc, argv);
943 return CMD_RET_USAGE;
947 env, CONFIG_SYS_MAXARGS, 1, do_env,
948 "environment handling commands",
949 #if defined(CONFIG_CMD_ASKENV)
950 "ask name [message] [size] - ask for environment variable\nenv "
952 "default -f - reset default environment\n"
953 #if defined(CONFIG_CMD_EDITENV)
954 "env edit name - edit environment variable\n"
956 #if defined(CONFIG_CMD_EXPORTENV)
957 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
959 #if defined(CONFIG_CMD_GREPENV)
960 "env grep string [...] - search environment\n"
962 #if defined(CONFIG_CMD_IMPORTENV)
963 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
965 "env print [name ...] - print environment\n"
966 #if defined(CONFIG_CMD_RUN)
967 "env run var [...] - run commands in an environment variable\n"
969 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
970 "env save - save environment\n"
972 "env set [-f] name [arg ...]\n"
976 * Old command line interface, kept for compatibility
979 #if defined(CONFIG_CMD_EDITENV)
981 editenv, 2, 0, do_env_edit,
982 "edit environment variable",
984 " - edit environment variable 'name'",
990 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
991 "print environment variables",
992 "\n - print values of all environment variables\n"
993 "printenv name ...\n"
994 " - print value of environment variable 'name'",
998 #ifdef CONFIG_CMD_GREPENV
1000 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1001 "search environment variables",
1003 " - list environment name=value pairs matching 'string'",
1008 U_BOOT_CMD_COMPLETE(
1009 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1010 "set environment variables",
1012 " - set environment variable 'name' to 'value ...'\n"
1014 " - delete environment variable 'name'",
1018 #if defined(CONFIG_CMD_ASKENV)
1021 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1022 "get environment variables from stdin",
1023 "name [message] [size]\n"
1024 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1026 " - get environment variable 'name' from stdin\n"
1027 "askenv name size\n"
1028 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1029 "askenv name [message] size\n"
1030 " - display 'message' string and get environment variable 'name'"
1031 "from stdin (max 'size' chars)"
1035 #if defined(CONFIG_CMD_RUN)
1036 U_BOOT_CMD_COMPLETE(
1037 run, CONFIG_SYS_MAXARGS, 1, do_run,
1038 "run commands in an environment variable",
1040 " - run the commands in the environment variable(s) 'var'",