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 * Maximum expected input data size for import command
77 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
79 ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
80 ulong save_addr; /* Default Save Address */
81 ulong save_size; /* Default Save Size (in bytes) */
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;
103 #ifndef CONFIG_SPL_BUILD
105 * Command interface: print one or all environment variables
107 * Returns 0 in case of error, or length of printed string
109 static int env_print(char *name)
114 if (name) { /* print a single name */
119 hsearch_r(e, FIND, &ep, &env_htab, 0);
122 len = printf("%s=%s\n", ep->key, ep->data);
126 /* print whole list */
127 len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);
135 /* should never happen */
139 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
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);
198 #endif /* CONFIG_SPL_BUILD */
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 * Also called as a callback function by himport_r().
206 * Returns 0 in case of success, 1 in case of failure.
207 * When (flag & H_FORCE) is set, do not print out any error message and force
208 * overwriting of write-once variables.
211 int env_check_apply(const char *name, const char *oldval,
212 const char *newval, int flag)
216 /* Default value for NULL to protect string-manipulating functions */
217 newval = newval ? : "";
219 /* Check for console redirection */
220 if (strcmp(name, "stdin") == 0)
222 else if (strcmp(name, "stdout") == 0)
224 else if (strcmp(name, "stderr") == 0)
227 if (console != -1 && (gd->flags & GD_FLG_DEVINIT) != 0) {
228 if ((newval == NULL) || (*newval == '\0')) {
229 /* We cannot delete stdin/stdout/stderr */
230 if ((flag & H_FORCE) == 0)
231 printf("Can't delete \"%s\"\n", name);
235 #ifdef CONFIG_CONSOLE_MUX
236 if (iomux_doenv(console, newval))
239 /* Try assigning specified device */
240 if (console_assign(console, newval) < 0)
242 #endif /* CONFIG_CONSOLE_MUX */
246 * Some variables like "ethaddr" and "serial#" can be set only once and
247 * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
249 #ifndef CONFIG_ENV_OVERWRITE
250 if (oldval != NULL && /* variable exists */
251 (flag & H_FORCE) == 0) { /* and we are not forced */
252 if (strcmp(name, "serial#") == 0 ||
253 (strcmp(name, "ethaddr") == 0
254 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
255 && strcmp(oldval, __stringify(CONFIG_ETHADDR)) != 0
256 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
258 printf("Can't overwrite \"%s\"\n", name);
264 * When we change baudrate, or we are doing an env default -a
265 * (which will erase all variables prior to calling this),
266 * we want the baudrate to actually change - for real.
268 if (oldval != NULL || /* variable exists */
269 (flag & H_NOCLEAR) == 0) { /* or env is clear */
271 * Switch to new baudrate if new baudrate is supported
273 if (strcmp(name, "baudrate") == 0) {
274 int baudrate = simple_strtoul(newval, NULL, 10);
276 for (i = 0; i < N_BAUDRATES; ++i) {
277 if (baudrate == baudrate_table[i])
280 if (i == N_BAUDRATES) {
281 if ((flag & H_FORCE) == 0)
282 printf("## Baudrate %d bps not "
283 "supported\n", baudrate);
286 if (gd->baudrate == baudrate) {
287 /* If unchanged, we just say it's OK */
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 * Some variables should be updated when the corresponding
307 * entry in the environment is changed
309 if (strcmp(name, "loadaddr") == 0) {
310 load_addr = simple_strtoul(newval, NULL, 16);
313 #if defined(CONFIG_CMD_NET)
314 else if (strcmp(name, "bootfile") == 0) {
315 copy_filename(BootFile, newval, sizeof(BootFile));
323 * Set a new environment variable,
324 * or replace or delete an existing one.
326 static int _do_env_set(int flag, int argc, char * const argv[])
329 char *name, *value, *s;
335 if (strchr(name, '=')) {
336 printf("## Error: illegal character '='"
337 "in variable name \"%s\"\n", name);
343 * search if variable with this name already exists
347 hsearch_r(e, FIND, &ep, &env_htab, 0);
350 * Perform requested checks.
352 if (env_check_apply(name, ep ? ep->data : NULL, value, 0)) {
353 debug("check function did not approve, refusing\n");
358 if (argc < 3 || argv[2] == NULL) {
359 int rc = hdelete_r(name, &env_htab, H_INTERACTIVE);
364 * Insert / replace new value
366 for (i = 2, len = 0; i < argc; ++i)
367 len += strlen(argv[i]) + 1;
371 printf("## Can't malloc %d bytes\n", len);
374 for (i = 2, s = value; i < argc; ++i) {
377 while ((*s++ = *v++) != '\0')
386 hsearch_r(e, ENTER, &ep, &env_htab, H_INTERACTIVE);
389 printf("## Error inserting \"%s\" variable, errno=%d\n",
397 int setenv(const char *varname, const char *varvalue)
399 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
401 if (varvalue == NULL || varvalue[0] == '\0')
402 return _do_env_set(0, 2, (char * const *)argv);
404 return _do_env_set(0, 3, (char * const *)argv);
408 * Set an environment variable to an integer value
410 * @param varname Environmet variable to set
411 * @param value Value to set it to
412 * @return 0 if ok, 1 on error
414 int setenv_ulong(const char *varname, ulong value)
416 /* TODO: this should be unsigned */
417 char *str = simple_itoa(value);
419 return setenv(varname, str);
423 * Set an environment variable to an address in hex
425 * @param varname Environmet variable to set
426 * @param addr Value to set it to
427 * @return 0 if ok, 1 on error
429 int setenv_addr(const char *varname, const void *addr)
433 sprintf(str, "%lx", (uintptr_t)addr);
434 return setenv(varname, str);
437 #ifndef CONFIG_SPL_BUILD
438 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
441 return CMD_RET_USAGE;
443 return _do_env_set(flag, argc, argv);
447 * Prompt for environment variable
449 #if defined(CONFIG_CMD_ASKENV)
450 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
452 char message[CONFIG_SYS_CBSIZE];
453 int size = CONFIG_SYS_CBSIZE - 1;
457 local_args[0] = argv[0];
458 local_args[1] = argv[1];
459 local_args[2] = NULL;
460 local_args[3] = NULL;
462 /* Check the syntax */
465 return CMD_RET_USAGE;
467 case 2: /* env_ask envname */
468 sprintf(message, "Please enter '%s':", argv[1]);
471 case 3: /* env_ask envname size */
472 sprintf(message, "Please enter '%s':", argv[1]);
473 size = simple_strtoul(argv[2], NULL, 10);
476 default: /* env_ask envname message1 ... messagen size */
477 for (i = 2, pos = 0; i < argc - 1; i++) {
479 message[pos++] = ' ';
481 strcpy(message + pos, argv[i]);
482 pos += strlen(argv[i]);
486 size = simple_strtoul(argv[argc - 1], NULL, 10);
490 if (size >= CONFIG_SYS_CBSIZE)
491 size = CONFIG_SYS_CBSIZE - 1;
496 /* prompt for input */
497 len = readline(message);
500 console_buffer[size] = '\0';
503 if (console_buffer[0] != '\0') {
504 local_args[2] = console_buffer;
508 /* Continue calling setenv code */
509 return _do_env_set(flag, len, local_args);
514 * Interactively edit an environment variable
516 #if defined(CONFIG_CMD_EDITENV)
517 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
520 char buffer[CONFIG_SYS_CBSIZE];
524 return CMD_RET_USAGE;
526 /* Set read buffer to initial value or empty sting */
527 init_val = getenv(argv[1]);
529 sprintf(buffer, "%s", init_val);
533 readline_into_buffer("edit: ", buffer, 0);
535 return setenv(argv[1], buffer);
537 #endif /* CONFIG_CMD_EDITENV */
538 #endif /* CONFIG_SPL_BUILD */
541 * Look up variable from environment,
542 * return address of storage for that variable,
543 * or NULL if not found
545 char *getenv(const char *name)
547 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
554 hsearch_r(e, FIND, &ep, &env_htab, 0);
556 return ep ? ep->data : NULL;
559 /* restricted capabilities before import */
560 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
561 return (char *)(gd->env_buf);
567 * Look up variable from environment for restricted C runtime env.
569 int getenv_f(const char *name, char *buf, unsigned len)
573 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
576 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
577 if (nxt >= CONFIG_ENV_SIZE)
581 val = envmatch((uchar *)name, i);
585 /* found; copy out */
586 for (n = 0; n < len; ++n, ++buf) {
587 *buf = env_get_char(val++);
595 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
605 * Decode the integer value of an environment variable and return it.
607 * @param name Name of environemnt variable
608 * @param base Number base to use (normally 10, or 16 for hex)
609 * @param default_val Default value to return if the variable is not
611 * @return the decoded value, or default_val if not found
613 ulong getenv_ulong(const char *name, int base, ulong default_val)
616 * We can use getenv() here, even before relocation, since the
617 * environment variable value is an integer and thus short.
619 const char *str = getenv(name);
621 return str ? simple_strtoul(str, NULL, base) : default_val;
624 #ifndef CONFIG_SPL_BUILD
625 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
626 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
629 printf("Saving Environment to %s...\n", env_name_spec);
631 return saveenv() ? 1 : 0;
635 saveenv, 1, 0, do_env_save,
636 "save environment variables to persistent storage",
640 #endif /* CONFIG_SPL_BUILD */
644 * Match a name / name=value pair
646 * s1 is either a simple 'name', or a 'name=value' pair.
647 * i2 is the environment index for a 'name2=value2' pair.
648 * If the names match, return the index for the value2, else -1.
650 int envmatch(uchar *s1, int i2)
655 while (*s1 == env_get_char(i2++))
659 if (*s1 == '\0' && env_get_char(i2-1) == '=')
665 #ifndef CONFIG_SPL_BUILD
666 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
667 int argc, char * const argv[])
669 int all = 0, flag = 0;
671 debug("Initial value for argc=%d\n", argc);
672 while (--argc > 0 && **++argv == '-') {
677 case 'a': /* default all */
680 case 'f': /* force */
684 return cmd_usage(cmdtp);
688 debug("Final value for argc=%d\n", argc);
689 if (all && (argc == 0)) {
690 /* Reset the whole environment */
691 set_default_env("## Resetting to default environment\n");
694 if (!all && (argc > 0)) {
695 /* Reset individual variables */
696 set_default_vars(argc, argv);
700 return cmd_usage(cmdtp);
703 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
704 int argc, char * const argv[])
706 printf("Not implemented yet\n");
710 #ifdef CONFIG_CMD_EXPORTENV
712 * env export [-t | -b | -c] [-s size] addr [var ...]
713 * -t: export as text format; if size is given, data will be
714 * padded with '\0' bytes; if not, one terminating '\0'
715 * will be added (which is included in the "filesize"
716 * setting so you can for exmple copy this to flash and
717 * keep the termination).
718 * -b: export as binary format (name=value pairs separated by
719 * '\0', list end marked by double "\0\0")
720 * -c: export as checksum protected environment format as
721 * used for example by "saveenv" command
723 * size of output buffer
724 * addr: memory address where environment gets stored
725 * var... List of variable names that get included into the
726 * export. Without arguments, the whole environment gets
729 * With "-c" and size is NOT given, then the export command will
730 * format the data as currently used for the persistent storage,
731 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
732 * prepend a valid CRC32 checksum and, in case of resundant
733 * environment, a "current" redundancy flag. If size is given, this
734 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
735 * checksum and redundancy flag will be inserted.
737 * With "-b" and "-t", always only the real data (including a
738 * terminating '\0' byte) will be written; here the optional size
739 * argument will be used to make sure not to overflow the user
740 * provided buffer; the command will abort if the size is not
741 * sufficient. Any remainign space will be '\0' padded.
743 * On successful return, the variable "filesize" will be set.
744 * Note that filesize includes the trailing/terminating '\0' byte(s).
746 * Usage szenario: create a text snapshot/backup of the current settings:
748 * => env export -t 100000
749 * => era ${backup_addr} +${filesize}
750 * => cp.b 100000 ${backup_addr} ${filesize}
752 * Re-import this snapshot, deleting all other settings:
754 * => env import -d -t ${backup_addr}
756 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
757 int argc, char * const argv[])
760 char *addr, *cmd, *res;
770 while (--argc > 0 && **++argv == '-') {
774 case 'b': /* raw binary format */
779 case 'c': /* external checksum format */
785 case 's': /* size given */
787 return cmd_usage(cmdtp);
788 size = simple_strtoul(*++argv, NULL, 16);
790 case 't': /* text format */
796 return CMD_RET_USAGE;
803 return CMD_RET_USAGE;
805 addr = (char *)simple_strtoul(argv[0], NULL, 16);
808 memset(addr, '\0', size);
813 if (sep) { /* export as text file */
814 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
816 error("Cannot export environment: errno = %d\n", errno);
819 sprintf(buf, "%zX", (size_t)len);
820 setenv("filesize", buf);
825 envp = (env_t *)addr;
827 if (chk) /* export as checksum protected block */
828 res = (char *)envp->data;
829 else /* export as raw binary data */
832 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
834 error("Cannot export environment: errno = %d\n", errno);
839 envp->crc = crc32(0, envp->data, ENV_SIZE);
840 #ifdef CONFIG_ENV_ADDR_REDUND
841 envp->flags = ACTIVE_FLAG;
844 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
845 setenv("filesize", buf);
850 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
855 #ifdef CONFIG_CMD_IMPORTENV
857 * env import [-d] [-t | -b | -c] addr [size]
858 * -d: delete existing environment before importing;
859 * otherwise overwrite / append to existion definitions
860 * -t: assume text format; either "size" must be given or the
861 * text data must be '\0' terminated
862 * -b: assume binary format ('\0' separated, "\0\0" terminated)
863 * -c: assume checksum protected environment format
864 * addr: memory address to read from
865 * size: length of input data; if missing, proper '\0'
866 * termination is mandatory
868 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
869 int argc, char * const argv[])
880 while (--argc > 0 && **++argv == '-') {
884 case 'b': /* raw binary format */
889 case 'c': /* external checksum format */
895 case 't': /* text format */
904 return CMD_RET_USAGE;
910 return CMD_RET_USAGE;
913 printf("## Warning: defaulting to text format\n");
915 addr = (char *)simple_strtoul(argv[0], NULL, 16);
918 size = simple_strtoul(argv[1], NULL, 16);
924 while (size < MAX_ENV_SIZE) {
925 if ((*s == sep) && (*(s+1) == '\0'))
930 if (size == MAX_ENV_SIZE) {
931 printf("## Warning: Input data exceeds %d bytes"
932 " - truncated\n", MAX_ENV_SIZE);
935 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
940 env_t *ep = (env_t *)addr;
942 size -= offsetof(env_t, data);
943 memcpy(&crc, &ep->crc, sizeof(crc));
945 if (crc32(0, ep->data, size) != crc) {
946 puts("## Error: bad CRC, import failed\n");
949 addr = (char *)ep->data;
952 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
954 error("Environment import failed: errno = %d\n", errno);
957 gd->flags |= GD_FLG_ENV_READY;
962 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
969 * New command line interface: "env" command with subcommands
971 static cmd_tbl_t cmd_env_sub[] = {
972 #if defined(CONFIG_CMD_ASKENV)
973 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
975 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
976 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
977 #if defined(CONFIG_CMD_EDITENV)
978 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
980 #if defined(CONFIG_CMD_EXPORTENV)
981 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
983 #if defined(CONFIG_CMD_GREPENV)
984 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
986 #if defined(CONFIG_CMD_IMPORTENV)
987 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
989 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
990 #if defined(CONFIG_CMD_RUN)
991 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
993 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
994 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
996 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
999 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1000 void env_reloc(void)
1002 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1006 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1011 return CMD_RET_USAGE;
1013 /* drop initial "env" arg */
1017 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1020 return cp->cmd(cmdtp, flag, argc, argv);
1022 return CMD_RET_USAGE;
1025 #ifdef CONFIG_SYS_LONGHELP
1026 static char env_help_text[] =
1027 #if defined(CONFIG_CMD_ASKENV)
1028 "ask name [message] [size] - ask for environment variable\nenv "
1030 "default [-f] -a - [forcibly] reset default environment\n"
1031 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1032 #if defined(CONFIG_CMD_EDITENV)
1033 "env edit name - edit environment variable\n"
1035 #if defined(CONFIG_CMD_EXPORTENV)
1036 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1038 #if defined(CONFIG_CMD_GREPENV)
1039 "env grep string [...] - search environment\n"
1041 #if defined(CONFIG_CMD_IMPORTENV)
1042 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1044 "env print [name ...] - print environment\n"
1045 #if defined(CONFIG_CMD_RUN)
1046 "env run var [...] - run commands in an environment variable\n"
1048 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1049 "env save - save environment\n"
1051 "env set [-f] name [arg ...]\n";
1055 env, CONFIG_SYS_MAXARGS, 1, do_env,
1056 "environment handling commands", env_help_text
1060 * Old command line interface, kept for compatibility
1063 #if defined(CONFIG_CMD_EDITENV)
1064 U_BOOT_CMD_COMPLETE(
1065 editenv, 2, 0, do_env_edit,
1066 "edit environment variable",
1068 " - edit environment variable 'name'",
1073 U_BOOT_CMD_COMPLETE(
1074 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1075 "print environment variables",
1076 "\n - print values of all environment variables\n"
1077 "printenv name ...\n"
1078 " - print value of environment variable 'name'",
1082 #ifdef CONFIG_CMD_GREPENV
1083 U_BOOT_CMD_COMPLETE(
1084 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1085 "search environment variables",
1087 " - list environment name=value pairs matching 'string'",
1092 U_BOOT_CMD_COMPLETE(
1093 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1094 "set environment variables",
1096 " - set environment variable 'name' to 'value ...'\n"
1098 " - delete environment variable 'name'",
1102 #if defined(CONFIG_CMD_ASKENV)
1105 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1106 "get environment variables from stdin",
1107 "name [message] [size]\n"
1108 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1110 " - get environment variable 'name' from stdin\n"
1111 "askenv name size\n"
1112 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1113 "askenv name [message] size\n"
1114 " - display 'message' string and get environment variable 'name'"
1115 "from stdin (max 'size' chars)"
1119 #if defined(CONFIG_CMD_RUN)
1120 U_BOOT_CMD_COMPLETE(
1121 run, CONFIG_SYS_MAXARGS, 1, do_run,
1122 "run commands in an environment variable",
1124 " - run the commands in the environment variable(s) 'var'",
1128 #endif /* CONFIG_SPL_BUILD */