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 */
82 ulong save_addr; /* Default Save Address */
83 ulong save_size; /* Default Save Size (in bytes) */
86 * Table with supported baudrates (defined in config_xyz.h)
88 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
89 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
92 * This variable is incremented on each do_env_set(), so it can
93 * be used via get_env_id() as an indication, if the environment
94 * has changed or not. So it is possible to reread an environment
95 * variable only if the environment was changed ... done so for
96 * example in NetInitLoop()
98 static int env_id = 1;
106 * Command interface: print one or all environment variables
108 * Returns 0 in case of error, or length of printed string
110 static int env_print(char *name)
115 if (name) { /* print a single name */
120 hsearch_r(e, FIND, &ep, &env_htab);
123 len = printf("%s=%s\n", ep->key, ep->data);
127 /* print whole list */
128 len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);
136 /* should never happen */
140 int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
146 /* print all env vars */
147 rcode = env_print(NULL);
150 printf("\nEnvironment size: %d/%ld bytes\n",
151 rcode, (ulong)ENV_SIZE);
155 /* print selected env vars */
156 for (i = 1; i < argc; ++i) {
157 int rc = env_print(argv[i]);
159 printf("## Error: \"%s\" not defined\n", argv[i]);
167 #ifdef CONFIG_CMD_GREPENV
168 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
169 int argc, char * const argv[])
172 unsigned char matched[env_htab.size / 8];
173 int rcode = 1, arg = 1, idx;
176 return CMD_RET_USAGE;
178 memset(matched, 0, env_htab.size / 8);
180 while (arg <= argc) {
182 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
183 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
189 matched[idx / 8] |= 1 << (idx & 7);
200 * Set a new environment variable,
201 * or replace or delete an existing one.
203 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 i = iomux_doenv(console, argv[2]);
246 /* Try assigning specified device */
247 if (console_assign(console, argv[2]) < 0)
250 #ifdef CONFIG_SERIAL_MULTI
251 if (serial_assign(argv[2]) < 0)
254 #endif /* CONFIG_CONSOLE_MUX */
258 * Some variables like "ethaddr" and "serial#" can be set only
259 * once and cannot be deleted; also, "ver" is readonly.
261 if (ep) { /* variable exists */
262 #ifndef CONFIG_ENV_OVERWRITE
263 if (strcmp(name, "serial#") == 0 ||
264 (strcmp(name, "ethaddr") == 0
265 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
266 && strcmp(ep->data, MK_STR(CONFIG_ETHADDR)) != 0
267 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
269 printf("Can't overwrite \"%s\"\n", name);
274 * Switch to new baudrate if new baudrate is supported
276 if (strcmp(name, "baudrate") == 0) {
277 int baudrate = simple_strtoul(argv[2], NULL, 10);
279 for (i = 0; i < N_BAUDRATES; ++i) {
280 if (baudrate == baudrate_table[i])
283 if (i == N_BAUDRATES) {
284 printf("## Baudrate %d bps not supported\n",
288 printf("## Switch baudrate to %d bps and"
289 "press ENTER ...\n", baudrate);
291 gd->baudrate = baudrate;
292 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
293 gd->bd->bi_baudrate = baudrate;
298 while (getc() != '\r')
304 if (argc < 3 || argv[2] == NULL) {
305 int rc = hdelete_r(name, &env_htab);
310 * Insert / replace new value
312 for (i = 2, len = 0; i < argc; ++i)
313 len += strlen(argv[i]) + 1;
317 printf("## Can't malloc %d bytes\n", len);
320 for (i = 2, s = value; i < argc; ++i) {
323 while ((*s++ = *v++) != '\0')
332 hsearch_r(e, ENTER, &ep, &env_htab);
335 printf("## Error inserting \"%s\" variable, errno=%d\n",
341 * Some variables should be updated when the corresponding
342 * 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;
356 bd->bi_ip_addr = htonl(addr);
358 } else if (strcmp(argv[1], "loadaddr") == 0) {
359 load_addr = simple_strtoul(argv[2], NULL, 16);
362 #if defined(CONFIG_CMD_NET)
363 else if (strcmp(argv[1], "bootfile") == 0) {
364 copy_filename(BootFile, argv[2], sizeof(BootFile));
371 int setenv(const char *varname, const char *varvalue)
373 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
375 if (varvalue == NULL || varvalue[0] == '\0')
376 return _do_env_set(0, 2, (char * const *)argv);
378 return _do_env_set(0, 3, (char * const *)argv);
382 * Set an environment variable to an integer value
384 * @param varname Environmet variable to set
385 * @param value Value to set it to
386 * @return 0 if ok, 1 on error
388 int setenv_ulong(const char *varname, ulong value)
390 /* TODO: this should be unsigned */
391 char *str = simple_itoa(value);
393 return setenv(varname, str);
397 * Set an environment variable to an address in hex
399 * @param varname Environmet variable to set
400 * @param addr Value to set it to
401 * @return 0 if ok, 1 on error
403 int setenv_addr(const char *varname, const void *addr)
407 sprintf(str, "%lx", (uintptr_t)addr);
408 return setenv(varname, str);
411 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
414 return CMD_RET_USAGE;
416 return _do_env_set(flag, argc, argv);
420 * Prompt for environment variable
422 #if defined(CONFIG_CMD_ASKENV)
423 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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_RET_USAGE;
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]);
459 size = simple_strtoul(argv[argc - 1], NULL, 10);
463 if (size >= CONFIG_SYS_CBSIZE)
464 size = CONFIG_SYS_CBSIZE - 1;
469 /* prompt for input */
470 len = readline(message);
473 console_buffer[size] = '\0';
476 if (console_buffer[0] != '\0') {
477 local_args[2] = console_buffer;
481 /* Continue calling setenv code */
482 return _do_env_set(flag, len, local_args);
487 * Interactively edit an environment variable
489 #if defined(CONFIG_CMD_EDITENV)
490 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
492 char buffer[CONFIG_SYS_CBSIZE];
496 return CMD_RET_USAGE;
498 /* Set read buffer to initial value or empty sting */
499 init_val = getenv(argv[1]);
501 sprintf(buffer, "%s", init_val);
505 readline_into_buffer("edit: ", buffer, 0);
507 return setenv(argv[1], buffer);
509 #endif /* CONFIG_CMD_EDITENV */
512 * Look up variable from environment,
513 * return address of storage for that variable,
514 * or NULL if not found
516 char *getenv(const char *name)
518 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
525 hsearch_r(e, FIND, &ep, &env_htab);
527 return ep ? ep->data : NULL;
530 /* 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 *buf = env_get_char(val++);
566 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
576 * Decode the integer value of an environment variable and return it.
578 * @param name Name of environemnt variable
579 * @param base Number base to use (normally 10, or 16 for hex)
580 * @param default_val Default value to return if the variable is not
582 * @return the decoded value, or default_val if not found
584 ulong getenv_ulong(const char *name, int base, ulong default_val)
587 * We can use getenv() here, even before relocation, since the
588 * environment variable value is an integer and thus short.
590 const char *str = getenv(name);
592 return str ? simple_strtoul(str, NULL, base) : default_val;
595 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
596 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
598 printf("Saving Environment to %s...\n", env_name_spec);
600 return saveenv() ? 1 : 0;
604 saveenv, 1, 0, do_env_save,
605 "save environment variables to persistent storage",
612 * Match a name / name=value pair
614 * s1 is either a simple 'name', or a 'name=value' pair.
615 * i2 is the environment index for a 'name2=value2' pair.
616 * If the names match, return the index for the value2, else -1.
618 int envmatch(uchar *s1, int i2)
620 while (*s1 == env_get_char(i2++))
624 if (*s1 == '\0' && env_get_char(i2-1) == '=')
630 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
631 int argc, char * const argv[])
633 if (argc != 2 || strcmp(argv[1], "-f") != 0)
634 return CMD_RET_USAGE;
636 set_default_env("## Resetting to default environment\n");
640 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
641 int argc, char * const argv[])
643 printf("Not implemented yet\n");
647 #ifdef CONFIG_CMD_EXPORTENV
649 * env export [-t | -b | -c] [-s size] addr [var ...]
650 * -t: export as text format; if size is given, data will be
651 * padded with '\0' bytes; if not, one terminating '\0'
652 * will be added (which is included in the "filesize"
653 * setting so you can for exmple copy this to flash and
654 * keep the termination).
655 * -b: export as binary format (name=value pairs separated by
656 * '\0', list end marked by double "\0\0")
657 * -c: export as checksum protected environment format as
658 * used for example by "saveenv" command
660 * size of output buffer
661 * addr: memory address where environment gets stored
662 * var... List of variable names that get included into the
663 * export. Without arguments, the whole environment gets
666 * With "-c" and size is NOT given, then the export command will
667 * format the data as currently used for the persistent storage,
668 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
669 * prepend a valid CRC32 checksum and, in case of resundant
670 * environment, a "current" redundancy flag. If size is given, this
671 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
672 * checksum and redundancy flag will be inserted.
674 * With "-b" and "-t", always only the real data (including a
675 * terminating '\0' byte) will be written; here the optional size
676 * argument will be used to make sure not to overflow the user
677 * provided buffer; the command will abort if the size is not
678 * sufficient. Any remainign space will be '\0' padded.
680 * On successful return, the variable "filesize" will be set.
681 * Note that filesize includes the trailing/terminating '\0' byte(s).
683 * Usage szenario: create a text snapshot/backup of the current settings:
685 * => env export -t 100000
686 * => era ${backup_addr} +${filesize}
687 * => cp.b 100000 ${backup_addr} ${filesize}
689 * Re-import this snapshot, deleting all other settings:
691 * => env import -d -t ${backup_addr}
693 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
694 int argc, char * const argv[])
697 char *addr, *cmd, *res;
707 while (--argc > 0 && **++argv == '-') {
711 case 'b': /* raw binary format */
716 case 'c': /* external checksum format */
722 case 's': /* size given */
724 return cmd_usage(cmdtp);
725 size = simple_strtoul(*++argv, NULL, 16);
727 case 't': /* text format */
733 return CMD_RET_USAGE;
740 return CMD_RET_USAGE;
742 addr = (char *)simple_strtoul(argv[0], NULL, 16);
745 memset(addr, '\0', size);
750 if (sep) { /* export as text file */
751 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
753 error("Cannot export environment: errno = %d\n", errno);
756 sprintf(buf, "%zX", (size_t)len);
757 setenv("filesize", buf);
762 envp = (env_t *)addr;
764 if (chk) /* export as checksum protected block */
765 res = (char *)envp->data;
766 else /* export as raw binary data */
769 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
771 error("Cannot export environment: errno = %d\n", errno);
776 envp->crc = crc32(0, envp->data, ENV_SIZE);
777 #ifdef CONFIG_ENV_ADDR_REDUND
778 envp->flags = ACTIVE_FLAG;
781 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
782 setenv("filesize", buf);
787 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
792 #ifdef CONFIG_CMD_IMPORTENV
794 * env import [-d] [-t | -b | -c] addr [size]
795 * -d: delete existing environment before importing;
796 * otherwise overwrite / append to existion definitions
797 * -t: assume text format; either "size" must be given or the
798 * text data must be '\0' terminated
799 * -b: assume binary format ('\0' separated, "\0\0" terminated)
800 * -c: assume checksum protected environment format
801 * addr: memory address to read from
802 * size: length of input data; if missing, proper '\0'
803 * termination is mandatory
805 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
806 int argc, char * const argv[])
817 while (--argc > 0 && **++argv == '-') {
821 case 'b': /* raw binary format */
826 case 'c': /* external checksum format */
832 case 't': /* text format */
841 return CMD_RET_USAGE;
847 return CMD_RET_USAGE;
850 printf("## Warning: defaulting to text format\n");
852 addr = (char *)simple_strtoul(argv[0], NULL, 16);
855 size = simple_strtoul(argv[1], NULL, 16);
861 while (size < MAX_ENV_SIZE) {
862 if ((*s == sep) && (*(s+1) == '\0'))
867 if (size == MAX_ENV_SIZE) {
868 printf("## Warning: Input data exceeds %d bytes"
869 " - truncated\n", MAX_ENV_SIZE);
872 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
877 env_t *ep = (env_t *)addr;
879 size -= offsetof(env_t, data);
880 memcpy(&crc, &ep->crc, sizeof(crc));
882 if (crc32(0, ep->data, size) != crc) {
883 puts("## Error: bad CRC, import failed\n");
886 addr = (char *)ep->data;
889 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR) == 0) {
890 error("Environment import failed: errno = %d\n", errno);
893 gd->flags |= GD_FLG_ENV_READY;
898 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
905 * New command line interface: "env" command with subcommands
907 static cmd_tbl_t cmd_env_sub[] = {
908 #if defined(CONFIG_CMD_ASKENV)
909 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
911 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
912 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
913 #if defined(CONFIG_CMD_EDITENV)
914 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
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;
962 env, CONFIG_SYS_MAXARGS, 1, do_env,
963 "environment handling commands",
964 #if defined(CONFIG_CMD_ASKENV)
965 "ask name [message] [size] - ask for environment variable\nenv "
967 "default -f - reset default environment\n"
968 #if defined(CONFIG_CMD_EDITENV)
969 "env edit name - edit environment variable\n"
971 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
972 #if defined(CONFIG_CMD_GREPENV)
973 "env grep string [...] - search environment\n"
975 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
976 "env print [name ...] - print environment\n"
977 #if defined(CONFIG_CMD_RUN)
978 "env run var [...] - run commands in an environment variable\n"
980 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
981 "env save - save environment\n"
983 "env set [-f] name [arg ...]\n"
987 * Old command line interface, kept for compatibility
990 #if defined(CONFIG_CMD_EDITENV)
992 editenv, 2, 0, do_env_edit,
993 "edit environment variable",
995 " - edit environment variable 'name'",
1000 U_BOOT_CMD_COMPLETE(
1001 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1002 "print environment variables",
1003 "\n - print values of all environment variables\n"
1004 "printenv name ...\n"
1005 " - print value of environment variable 'name'",
1009 #ifdef CONFIG_CMD_GREPENV
1010 U_BOOT_CMD_COMPLETE(
1011 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1012 "search environment variables",
1014 " - list environment name=value pairs matching 'string'",
1019 U_BOOT_CMD_COMPLETE(
1020 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1021 "set environment variables",
1023 " - set environment variable 'name' to 'value ...'\n"
1025 " - delete environment variable 'name'",
1029 #if defined(CONFIG_CMD_ASKENV)
1032 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1033 "get environment variables from stdin",
1034 "name [message] [size]\n"
1035 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1037 " - get environment variable 'name' from stdin\n"
1038 "askenv name size\n"
1039 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1040 "askenv name [message] size\n"
1041 " - display 'message' string and get environment variable 'name'"
1042 "from stdin (max 'size' chars)"
1046 #if defined(CONFIG_CMD_RUN)
1047 U_BOOT_CMD_COMPLETE(
1048 run, CONFIG_SYS_MAXARGS, 1, do_run,
1049 "run commands in an environment variable",
1051 " - run the commands in the environment variable(s) 'var'",