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 * Perform consistency checking before setting, replacing, or deleting an
202 * environment variable, then (if successful) apply the changes to internals so
203 * to make them effective. Code for this function was taken out of
204 * _do_env_set(), which now calls it instead.
205 * Returns 0 in case of success, 1 in case of failure.
206 * When (flag & H_FORCE) is set, do not print out any error message and force
207 * overwriting of write-once variables.
210 int env_check_apply(const char *name, const char *oldval,
211 const char *newval, int flag)
217 /* Check for console redirection */
218 if (strcmp(name, "stdin") == 0)
220 else if (strcmp(name, "stdout") == 0)
222 else if (strcmp(name, "stderr") == 0)
226 if ((newval == NULL) || (*newval == '\0')) {
227 /* We cannot delete stdin/stdout/stderr */
228 if ((flag & H_FORCE) == 0)
229 printf("Can't delete \"%s\"\n", name);
233 #ifdef CONFIG_CONSOLE_MUX
234 i = iomux_doenv(console, newval);
238 /* Try assigning specified device */
239 if (console_assign(console, newval) < 0)
242 #ifdef CONFIG_SERIAL_MULTI
243 if (serial_assign(newval) < 0)
246 #endif /* CONFIG_CONSOLE_MUX */
250 * Some variables like "ethaddr" and "serial#" can be set only once and
251 * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
253 #ifndef CONFIG_ENV_OVERWRITE
254 if (oldval != NULL && /* variable exists */
255 (flag & H_FORCE) == 0) { /* and we are not forced */
256 if (strcmp(name, "serial#") == 0 ||
257 (strcmp(name, "ethaddr") == 0
258 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
259 && strcmp(oldval, MK_STR(CONFIG_ETHADDR)) != 0
260 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
262 printf("Can't overwrite \"%s\"\n", name);
268 * When we change baudrate, or we are doing an env default -a
269 * (which will erase all variables prior to calling this),
270 * we want the baudrate to actually change - for real.
272 if (oldval != NULL || /* variable exists */
273 (flag & H_NOCLEAR) == 0) { /* or env is clear */
275 * Switch to new baudrate if new baudrate is supported
277 if (strcmp(name, "baudrate") == 0) {
278 int baudrate = simple_strtoul(newval, NULL, 10);
280 for (i = 0; i < N_BAUDRATES; ++i) {
281 if (baudrate == baudrate_table[i])
284 if (i == N_BAUDRATES) {
285 if ((flag & H_FORCE) == 0)
286 printf("## Baudrate %d bps not "
287 "supported\n", baudrate);
290 if (gd->baudrate == baudrate) {
291 /* If unchanged, we just say it's OK */
294 printf("## Switch baudrate to %d bps and"
295 "press ENTER ...\n", baudrate);
297 gd->baudrate = baudrate;
298 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
299 gd->bd->bi_baudrate = baudrate;
304 while (getc() != '\r')
310 * Some variables should be updated when the corresponding
311 * entry in the environment is changed
313 if (strcmp(name, "ipaddr") == 0) {
314 const char *s = newval;
318 for (addr = 0, i = 0; i < 4; ++i) {
319 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
325 bd->bi_ip_addr = htonl(addr);
327 } else if (strcmp(name, "loadaddr") == 0) {
328 load_addr = simple_strtoul(newval, NULL, 16);
331 #if defined(CONFIG_CMD_NET)
332 else if (strcmp(name, "bootfile") == 0) {
333 copy_filename(BootFile, newval, sizeof(BootFile));
341 * Set a new environment variable,
342 * or replace or delete an existing one.
344 int _do_env_set(int flag, int argc, char * const argv[])
347 char *name, *value, *s;
353 if (strchr(name, '=')) {
354 printf("## Error: illegal character '='"
355 "in variable name \"%s\"\n", name);
361 * search if variable with this name already exists
365 hsearch_r(e, FIND, &ep, &env_htab);
368 * Perform requested checks. Notice how since we are overwriting
369 * a single variable, we need to set H_NOCLEAR
371 if (env_check_apply(name, ep ? ep->data : NULL, value, H_NOCLEAR)) {
372 debug("check function did not approve, refusing\n");
377 if (argc < 3 || argv[2] == NULL) {
378 int rc = hdelete_r(name, &env_htab);
383 * Insert / replace new value
385 for (i = 2, len = 0; i < argc; ++i)
386 len += strlen(argv[i]) + 1;
390 printf("## Can't malloc %d bytes\n", len);
393 for (i = 2, s = value; i < argc; ++i) {
396 while ((*s++ = *v++) != '\0')
405 hsearch_r(e, ENTER, &ep, &env_htab);
408 printf("## Error inserting \"%s\" variable, errno=%d\n",
416 int setenv(const char *varname, const char *varvalue)
418 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
420 if (varvalue == NULL || varvalue[0] == '\0')
421 return _do_env_set(0, 2, (char * const *)argv);
423 return _do_env_set(0, 3, (char * const *)argv);
427 * Set an environment variable to an integer value
429 * @param varname Environmet variable to set
430 * @param value Value to set it to
431 * @return 0 if ok, 1 on error
433 int setenv_ulong(const char *varname, ulong value)
435 /* TODO: this should be unsigned */
436 char *str = simple_itoa(value);
438 return setenv(varname, str);
442 * Set an environment variable to an address in hex
444 * @param varname Environmet variable to set
445 * @param addr Value to set it to
446 * @return 0 if ok, 1 on error
448 int setenv_addr(const char *varname, const void *addr)
452 sprintf(str, "%lx", (uintptr_t)addr);
453 return setenv(varname, str);
456 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
459 return CMD_RET_USAGE;
461 return _do_env_set(flag, argc, argv);
465 * Prompt for environment variable
467 #if defined(CONFIG_CMD_ASKENV)
468 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
470 char message[CONFIG_SYS_CBSIZE];
471 int size = CONFIG_SYS_CBSIZE - 1;
475 local_args[0] = argv[0];
476 local_args[1] = argv[1];
477 local_args[2] = NULL;
478 local_args[3] = NULL;
480 /* Check the syntax */
483 return CMD_RET_USAGE;
485 case 2: /* env_ask envname */
486 sprintf(message, "Please enter '%s':", argv[1]);
489 case 3: /* env_ask envname size */
490 sprintf(message, "Please enter '%s':", argv[1]);
491 size = simple_strtoul(argv[2], NULL, 10);
494 default: /* env_ask envname message1 ... messagen size */
495 for (i = 2, pos = 0; i < argc - 1; i++) {
497 message[pos++] = ' ';
499 strcpy(message + pos, argv[i]);
500 pos += strlen(argv[i]);
504 size = simple_strtoul(argv[argc - 1], NULL, 10);
508 if (size >= CONFIG_SYS_CBSIZE)
509 size = CONFIG_SYS_CBSIZE - 1;
514 /* prompt for input */
515 len = readline(message);
518 console_buffer[size] = '\0';
521 if (console_buffer[0] != '\0') {
522 local_args[2] = console_buffer;
526 /* Continue calling setenv code */
527 return _do_env_set(flag, len, local_args);
532 * Interactively edit an environment variable
534 #if defined(CONFIG_CMD_EDITENV)
535 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
537 char buffer[CONFIG_SYS_CBSIZE];
541 return CMD_RET_USAGE;
543 /* Set read buffer to initial value or empty sting */
544 init_val = getenv(argv[1]);
546 sprintf(buffer, "%s", init_val);
550 readline_into_buffer("edit: ", buffer, 0);
552 return setenv(argv[1], buffer);
554 #endif /* CONFIG_CMD_EDITENV */
557 * Look up variable from environment,
558 * return address of storage for that variable,
559 * or NULL if not found
561 char *getenv(const char *name)
563 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
570 hsearch_r(e, FIND, &ep, &env_htab);
572 return ep ? ep->data : NULL;
575 /* restricted capabilities before import */
576 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
577 return (char *)(gd->env_buf);
583 * Look up variable from environment for restricted C runtime env.
585 int getenv_f(const char *name, char *buf, unsigned len)
589 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
592 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
593 if (nxt >= CONFIG_ENV_SIZE)
597 val = envmatch((uchar *)name, i);
601 /* found; copy out */
602 for (n = 0; n < len; ++n, ++buf) {
603 *buf = env_get_char(val++);
611 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
621 * Decode the integer value of an environment variable and return it.
623 * @param name Name of environemnt variable
624 * @param base Number base to use (normally 10, or 16 for hex)
625 * @param default_val Default value to return if the variable is not
627 * @return the decoded value, or default_val if not found
629 ulong getenv_ulong(const char *name, int base, ulong default_val)
632 * We can use getenv() here, even before relocation, since the
633 * environment variable value is an integer and thus short.
635 const char *str = getenv(name);
637 return str ? simple_strtoul(str, NULL, base) : default_val;
640 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
641 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
643 printf("Saving Environment to %s...\n", env_name_spec);
645 return saveenv() ? 1 : 0;
649 saveenv, 1, 0, do_env_save,
650 "save environment variables to persistent storage",
657 * Match a name / name=value pair
659 * s1 is either a simple 'name', or a 'name=value' pair.
660 * i2 is the environment index for a 'name2=value2' pair.
661 * If the names match, return the index for the value2, else -1.
663 int envmatch(uchar *s1, int i2)
665 while (*s1 == env_get_char(i2++))
669 if (*s1 == '\0' && env_get_char(i2-1) == '=')
675 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
676 int argc, char * const argv[])
678 if (argc != 2 || strcmp(argv[1], "-f") != 0)
679 return CMD_RET_USAGE;
681 set_default_env("## Resetting to default environment\n");
685 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
686 int argc, char * const argv[])
688 printf("Not implemented yet\n");
692 #ifdef CONFIG_CMD_EXPORTENV
694 * env export [-t | -b | -c] [-s size] addr [var ...]
695 * -t: export as text format; if size is given, data will be
696 * padded with '\0' bytes; if not, one terminating '\0'
697 * will be added (which is included in the "filesize"
698 * setting so you can for exmple copy this to flash and
699 * keep the termination).
700 * -b: export as binary format (name=value pairs separated by
701 * '\0', list end marked by double "\0\0")
702 * -c: export as checksum protected environment format as
703 * used for example by "saveenv" command
705 * size of output buffer
706 * addr: memory address where environment gets stored
707 * var... List of variable names that get included into the
708 * export. Without arguments, the whole environment gets
711 * With "-c" and size is NOT given, then the export command will
712 * format the data as currently used for the persistent storage,
713 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
714 * prepend a valid CRC32 checksum and, in case of resundant
715 * environment, a "current" redundancy flag. If size is given, this
716 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
717 * checksum and redundancy flag will be inserted.
719 * With "-b" and "-t", always only the real data (including a
720 * terminating '\0' byte) will be written; here the optional size
721 * argument will be used to make sure not to overflow the user
722 * provided buffer; the command will abort if the size is not
723 * sufficient. Any remainign space will be '\0' padded.
725 * On successful return, the variable "filesize" will be set.
726 * Note that filesize includes the trailing/terminating '\0' byte(s).
728 * Usage szenario: create a text snapshot/backup of the current settings:
730 * => env export -t 100000
731 * => era ${backup_addr} +${filesize}
732 * => cp.b 100000 ${backup_addr} ${filesize}
734 * Re-import this snapshot, deleting all other settings:
736 * => env import -d -t ${backup_addr}
738 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
739 int argc, char * const argv[])
742 char *addr, *cmd, *res;
752 while (--argc > 0 && **++argv == '-') {
756 case 'b': /* raw binary format */
761 case 'c': /* external checksum format */
767 case 's': /* size given */
769 return cmd_usage(cmdtp);
770 size = simple_strtoul(*++argv, NULL, 16);
772 case 't': /* text format */
778 return CMD_RET_USAGE;
785 return CMD_RET_USAGE;
787 addr = (char *)simple_strtoul(argv[0], NULL, 16);
790 memset(addr, '\0', size);
795 if (sep) { /* export as text file */
796 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
798 error("Cannot export environment: errno = %d\n", errno);
801 sprintf(buf, "%zX", (size_t)len);
802 setenv("filesize", buf);
807 envp = (env_t *)addr;
809 if (chk) /* export as checksum protected block */
810 res = (char *)envp->data;
811 else /* export as raw binary data */
814 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
816 error("Cannot export environment: errno = %d\n", errno);
821 envp->crc = crc32(0, envp->data, ENV_SIZE);
822 #ifdef CONFIG_ENV_ADDR_REDUND
823 envp->flags = ACTIVE_FLAG;
826 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
827 setenv("filesize", buf);
832 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
837 #ifdef CONFIG_CMD_IMPORTENV
839 * env import [-d] [-t | -b | -c] addr [size]
840 * -d: delete existing environment before importing;
841 * otherwise overwrite / append to existion definitions
842 * -t: assume text format; either "size" must be given or the
843 * text data must be '\0' terminated
844 * -b: assume binary format ('\0' separated, "\0\0" terminated)
845 * -c: assume checksum protected environment format
846 * addr: memory address to read from
847 * size: length of input data; if missing, proper '\0'
848 * termination is mandatory
850 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
851 int argc, char * const argv[])
862 while (--argc > 0 && **++argv == '-') {
866 case 'b': /* raw binary format */
871 case 'c': /* external checksum format */
877 case 't': /* text format */
886 return CMD_RET_USAGE;
892 return CMD_RET_USAGE;
895 printf("## Warning: defaulting to text format\n");
897 addr = (char *)simple_strtoul(argv[0], NULL, 16);
900 size = simple_strtoul(argv[1], NULL, 16);
906 while (size < MAX_ENV_SIZE) {
907 if ((*s == sep) && (*(s+1) == '\0'))
912 if (size == MAX_ENV_SIZE) {
913 printf("## Warning: Input data exceeds %d bytes"
914 " - truncated\n", MAX_ENV_SIZE);
917 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
922 env_t *ep = (env_t *)addr;
924 size -= offsetof(env_t, data);
925 memcpy(&crc, &ep->crc, sizeof(crc));
927 if (crc32(0, ep->data, size) != crc) {
928 puts("## Error: bad CRC, import failed\n");
931 addr = (char *)ep->data;
934 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
936 error("Environment import failed: errno = %d\n", errno);
939 gd->flags |= GD_FLG_ENV_READY;
944 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
951 * New command line interface: "env" command with subcommands
953 static cmd_tbl_t cmd_env_sub[] = {
954 #if defined(CONFIG_CMD_ASKENV)
955 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
957 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
958 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
959 #if defined(CONFIG_CMD_EDITENV)
960 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
962 #if defined(CONFIG_CMD_EXPORTENV)
963 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
965 #if defined(CONFIG_CMD_GREPENV)
966 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
968 #if defined(CONFIG_CMD_IMPORTENV)
969 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
971 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
972 #if defined(CONFIG_CMD_RUN)
973 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
975 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
976 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
978 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
981 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
984 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
988 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
993 return CMD_RET_USAGE;
995 /* drop initial "env" arg */
999 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1002 return cp->cmd(cmdtp, flag, argc, argv);
1004 return CMD_RET_USAGE;
1008 env, CONFIG_SYS_MAXARGS, 1, do_env,
1009 "environment handling commands",
1010 #if defined(CONFIG_CMD_ASKENV)
1011 "ask name [message] [size] - ask for environment variable\nenv "
1013 "default -f - reset default environment\n"
1014 #if defined(CONFIG_CMD_EDITENV)
1015 "env edit name - edit environment variable\n"
1017 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1018 #if defined(CONFIG_CMD_GREPENV)
1019 "env grep string [...] - search environment\n"
1021 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1022 "env print [name ...] - print environment\n"
1023 #if defined(CONFIG_CMD_RUN)
1024 "env run var [...] - run commands in an environment variable\n"
1026 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1027 "env save - save environment\n"
1029 "env set [-f] name [arg ...]\n"
1033 * Old command line interface, kept for compatibility
1036 #if defined(CONFIG_CMD_EDITENV)
1037 U_BOOT_CMD_COMPLETE(
1038 editenv, 2, 0, do_env_edit,
1039 "edit environment variable",
1041 " - edit environment variable 'name'",
1046 U_BOOT_CMD_COMPLETE(
1047 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1048 "print environment variables",
1049 "\n - print values of all environment variables\n"
1050 "printenv name ...\n"
1051 " - print value of environment variable 'name'",
1055 #ifdef CONFIG_CMD_GREPENV
1056 U_BOOT_CMD_COMPLETE(
1057 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1058 "search environment variables",
1060 " - list environment name=value pairs matching 'string'",
1065 U_BOOT_CMD_COMPLETE(
1066 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1067 "set environment variables",
1069 " - set environment variable 'name' to 'value ...'\n"
1071 " - delete environment variable 'name'",
1075 #if defined(CONFIG_CMD_ASKENV)
1078 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1079 "get environment variables from stdin",
1080 "name [message] [size]\n"
1081 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1083 " - get environment variable 'name' from stdin\n"
1084 "askenv name size\n"
1085 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1086 "askenv name [message] size\n"
1087 " - display 'message' string and get environment variable 'name'"
1088 "from stdin (max 'size' chars)"
1092 #if defined(CONFIG_CMD_RUN)
1093 U_BOOT_CMD_COMPLETE(
1094 run, CONFIG_SYS_MAXARGS, 1, do_run,
1095 "run commands in an environment variable",
1097 " - run the commands in the environment variable(s) 'var'",