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;
106 #ifndef CONFIG_SPL_BUILD
108 * Command interface: print one or all environment variables
110 * Returns 0 in case of error, or length of printed string
112 static int env_print(char *name)
117 if (name) { /* print a single name */
122 hsearch_r(e, FIND, &ep, &env_htab);
125 len = printf("%s=%s\n", ep->key, ep->data);
129 /* print whole list */
130 len = hexport_r(&env_htab, '\n', &res, 0, 0, NULL);
138 /* should never happen */
142 int do_env_print (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
148 /* print all env vars */
149 rcode = env_print(NULL);
152 printf("\nEnvironment size: %d/%ld bytes\n",
153 rcode, (ulong)ENV_SIZE);
157 /* print selected env vars */
158 for (i = 1; i < argc; ++i) {
159 int rc = env_print(argv[i]);
161 printf("## Error: \"%s\" not defined\n", argv[i]);
169 #ifdef CONFIG_CMD_GREPENV
170 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
171 int argc, char * const argv[])
174 unsigned char matched[env_htab.size / 8];
175 int rcode = 1, arg = 1, idx;
178 return CMD_RET_USAGE;
180 memset(matched, 0, env_htab.size / 8);
182 while (arg <= argc) {
184 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
185 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
191 matched[idx / 8] |= 1 << (idx & 7);
200 #endif /* CONFIG_SPL_BUILD */
203 * Perform consistency checking before setting, replacing, or deleting an
204 * environment variable, then (if successful) apply the changes to internals so
205 * to make them effective. Code for this function was taken out of
206 * _do_env_set(), which now calls it instead.
207 * Also called as a callback function by himport_r().
208 * Returns 0 in case of success, 1 in case of failure.
209 * When (flag & H_FORCE) is set, do not print out any error message and force
210 * overwriting of write-once variables.
213 int env_check_apply(const char *name, const char *oldval,
214 const char *newval, int flag)
218 /* Default value for NULL to protect string-manipulating functions */
219 newval = newval ? : "";
221 /* Check for console redirection */
222 if (strcmp(name, "stdin") == 0)
224 else if (strcmp(name, "stdout") == 0)
226 else if (strcmp(name, "stderr") == 0)
230 if ((newval == NULL) || (*newval == '\0')) {
231 /* We cannot delete stdin/stdout/stderr */
232 if ((flag & H_FORCE) == 0)
233 printf("Can't delete \"%s\"\n", name);
237 #ifdef CONFIG_CONSOLE_MUX
238 if (iomux_doenv(console, newval))
241 /* Try assigning specified device */
242 if (console_assign(console, newval) < 0)
245 #ifdef CONFIG_SERIAL_MULTI
246 if (serial_assign(newval) < 0)
249 #endif /* CONFIG_CONSOLE_MUX */
253 * Some variables like "ethaddr" and "serial#" can be set only once and
254 * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
256 #ifndef CONFIG_ENV_OVERWRITE
257 if (oldval != NULL && /* variable exists */
258 (flag & H_FORCE) == 0) { /* and we are not forced */
259 if (strcmp(name, "serial#") == 0 ||
260 (strcmp(name, "ethaddr") == 0
261 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
262 && strcmp(oldval, MK_STR(CONFIG_ETHADDR)) != 0
263 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
265 printf("Can't overwrite \"%s\"\n", name);
271 * When we change baudrate, or we are doing an env default -a
272 * (which will erase all variables prior to calling this),
273 * we want the baudrate to actually change - for real.
275 if (oldval != NULL || /* variable exists */
276 (flag & H_NOCLEAR) == 0) { /* or env is clear */
278 * Switch to new baudrate if new baudrate is supported
280 if (strcmp(name, "baudrate") == 0) {
281 int baudrate = simple_strtoul(newval, NULL, 10);
283 for (i = 0; i < N_BAUDRATES; ++i) {
284 if (baudrate == baudrate_table[i])
287 if (i == N_BAUDRATES) {
288 if ((flag & H_FORCE) == 0)
289 printf("## Baudrate %d bps not "
290 "supported\n", baudrate);
293 if (gd->baudrate == baudrate) {
294 /* If unchanged, we just say it's OK */
297 printf("## Switch baudrate to %d bps and"
298 "press ENTER ...\n", baudrate);
300 gd->baudrate = baudrate;
301 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
302 gd->bd->bi_baudrate = baudrate;
307 while (getc() != '\r')
313 * Some variables should be updated when the corresponding
314 * entry in the environment is changed
316 if (strcmp(name, "loadaddr") == 0) {
317 load_addr = simple_strtoul(newval, NULL, 16);
320 #if defined(CONFIG_CMD_NET)
321 else if (strcmp(name, "bootfile") == 0) {
322 copy_filename(BootFile, newval, sizeof(BootFile));
330 * Set a new environment variable,
331 * or replace or delete an existing one.
333 int _do_env_set(int flag, int argc, char * const argv[])
336 char *name, *value, *s;
342 if (strchr(name, '=')) {
343 printf("## Error: illegal character '='"
344 "in variable name \"%s\"\n", name);
350 * search if variable with this name already exists
354 hsearch_r(e, FIND, &ep, &env_htab);
357 * Perform requested checks. Notice how since we are overwriting
358 * a single variable, we need to set H_NOCLEAR
360 if (env_check_apply(name, ep ? ep->data : NULL, value, H_NOCLEAR)) {
361 debug("check function did not approve, refusing\n");
366 if (argc < 3 || argv[2] == NULL) {
367 int rc = hdelete_r(name, &env_htab, 0);
372 * Insert / replace new value
374 for (i = 2, len = 0; i < argc; ++i)
375 len += strlen(argv[i]) + 1;
379 printf("## Can't malloc %d bytes\n", len);
382 for (i = 2, s = value; i < argc; ++i) {
385 while ((*s++ = *v++) != '\0')
394 hsearch_r(e, ENTER, &ep, &env_htab);
397 printf("## Error inserting \"%s\" variable, errno=%d\n",
405 int setenv(const char *varname, const char *varvalue)
407 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
409 if (varvalue == NULL || varvalue[0] == '\0')
410 return _do_env_set(0, 2, (char * const *)argv);
412 return _do_env_set(0, 3, (char * const *)argv);
416 * Set an environment variable to an integer value
418 * @param varname Environmet variable to set
419 * @param value Value to set it to
420 * @return 0 if ok, 1 on error
422 int setenv_ulong(const char *varname, ulong value)
424 /* TODO: this should be unsigned */
425 char *str = simple_itoa(value);
427 return setenv(varname, str);
431 * Set an environment variable to an address in hex
433 * @param varname Environmet variable to set
434 * @param addr Value to set it to
435 * @return 0 if ok, 1 on error
437 int setenv_addr(const char *varname, const void *addr)
441 sprintf(str, "%lx", (uintptr_t)addr);
442 return setenv(varname, str);
445 #ifndef CONFIG_SPL_BUILD
446 int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
449 return CMD_RET_USAGE;
451 return _do_env_set(flag, argc, argv);
455 * Prompt for environment variable
457 #if defined(CONFIG_CMD_ASKENV)
458 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
460 char message[CONFIG_SYS_CBSIZE];
461 int size = CONFIG_SYS_CBSIZE - 1;
465 local_args[0] = argv[0];
466 local_args[1] = argv[1];
467 local_args[2] = NULL;
468 local_args[3] = NULL;
470 /* Check the syntax */
473 return CMD_RET_USAGE;
475 case 2: /* env_ask envname */
476 sprintf(message, "Please enter '%s':", argv[1]);
479 case 3: /* env_ask envname size */
480 sprintf(message, "Please enter '%s':", argv[1]);
481 size = simple_strtoul(argv[2], NULL, 10);
484 default: /* env_ask envname message1 ... messagen size */
485 for (i = 2, pos = 0; i < argc - 1; i++) {
487 message[pos++] = ' ';
489 strcpy(message + pos, argv[i]);
490 pos += strlen(argv[i]);
494 size = simple_strtoul(argv[argc - 1], NULL, 10);
498 if (size >= CONFIG_SYS_CBSIZE)
499 size = CONFIG_SYS_CBSIZE - 1;
504 /* prompt for input */
505 len = readline(message);
508 console_buffer[size] = '\0';
511 if (console_buffer[0] != '\0') {
512 local_args[2] = console_buffer;
516 /* Continue calling setenv code */
517 return _do_env_set(flag, len, local_args);
522 * Interactively edit an environment variable
524 #if defined(CONFIG_CMD_EDITENV)
525 int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
527 char buffer[CONFIG_SYS_CBSIZE];
531 return CMD_RET_USAGE;
533 /* Set read buffer to initial value or empty sting */
534 init_val = getenv(argv[1]);
536 sprintf(buffer, "%s", init_val);
540 readline_into_buffer("edit: ", buffer, 0);
542 return setenv(argv[1], buffer);
544 #endif /* CONFIG_CMD_EDITENV */
545 #endif /* CONFIG_SPL_BUILD */
548 * Look up variable from environment,
549 * return address of storage for that variable,
550 * or NULL if not found
552 char *getenv(const char *name)
554 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
561 hsearch_r(e, FIND, &ep, &env_htab);
563 return ep ? ep->data : NULL;
566 /* restricted capabilities before import */
567 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
568 return (char *)(gd->env_buf);
574 * Look up variable from environment for restricted C runtime env.
576 int getenv_f(const char *name, char *buf, unsigned len)
580 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
583 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
584 if (nxt >= CONFIG_ENV_SIZE)
588 val = envmatch((uchar *)name, i);
592 /* found; copy out */
593 for (n = 0; n < len; ++n, ++buf) {
594 *buf = env_get_char(val++);
602 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
612 * Decode the integer value of an environment variable and return it.
614 * @param name Name of environemnt variable
615 * @param base Number base to use (normally 10, or 16 for hex)
616 * @param default_val Default value to return if the variable is not
618 * @return the decoded value, or default_val if not found
620 ulong getenv_ulong(const char *name, int base, ulong default_val)
623 * We can use getenv() here, even before relocation, since the
624 * environment variable value is an integer and thus short.
626 const char *str = getenv(name);
628 return str ? simple_strtoul(str, NULL, base) : default_val;
631 #ifndef CONFIG_SPL_BUILD
632 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
633 int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
635 printf("Saving Environment to %s...\n", env_name_spec);
637 return saveenv() ? 1 : 0;
641 saveenv, 1, 0, do_env_save,
642 "save environment variables to persistent storage",
646 #endif /* CONFIG_SPL_BUILD */
650 * Match a name / name=value pair
652 * s1 is either a simple 'name', or a 'name=value' pair.
653 * i2 is the environment index for a 'name2=value2' pair.
654 * If the names match, return the index for the value2, else -1.
656 int envmatch(uchar *s1, int i2)
658 while (*s1 == env_get_char(i2++))
662 if (*s1 == '\0' && env_get_char(i2-1) == '=')
668 #ifndef CONFIG_SPL_BUILD
669 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
670 int argc, char * const argv[])
672 int all = 0, flag = 0;
674 debug("Initial value for argc=%d\n", argc);
675 while (--argc > 0 && **++argv == '-') {
680 case 'a': /* default all */
683 case 'f': /* force */
687 return cmd_usage(cmdtp);
691 debug("Final value for argc=%d\n", argc);
692 if (all && (argc == 0)) {
693 /* Reset the whole environment */
694 set_default_env("## Resetting to default environment\n");
697 if (!all && (argc > 0)) {
698 /* Reset individual variables */
699 set_default_vars(argc, argv);
703 return cmd_usage(cmdtp);
706 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
707 int argc, char * const argv[])
709 printf("Not implemented yet\n");
713 #ifdef CONFIG_CMD_EXPORTENV
715 * env export [-t | -b | -c] [-s size] addr [var ...]
716 * -t: export as text format; if size is given, data will be
717 * padded with '\0' bytes; if not, one terminating '\0'
718 * will be added (which is included in the "filesize"
719 * setting so you can for exmple copy this to flash and
720 * keep the termination).
721 * -b: export as binary format (name=value pairs separated by
722 * '\0', list end marked by double "\0\0")
723 * -c: export as checksum protected environment format as
724 * used for example by "saveenv" command
726 * size of output buffer
727 * addr: memory address where environment gets stored
728 * var... List of variable names that get included into the
729 * export. Without arguments, the whole environment gets
732 * With "-c" and size is NOT given, then the export command will
733 * format the data as currently used for the persistent storage,
734 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
735 * prepend a valid CRC32 checksum and, in case of resundant
736 * environment, a "current" redundancy flag. If size is given, this
737 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
738 * checksum and redundancy flag will be inserted.
740 * With "-b" and "-t", always only the real data (including a
741 * terminating '\0' byte) will be written; here the optional size
742 * argument will be used to make sure not to overflow the user
743 * provided buffer; the command will abort if the size is not
744 * sufficient. Any remainign space will be '\0' padded.
746 * On successful return, the variable "filesize" will be set.
747 * Note that filesize includes the trailing/terminating '\0' byte(s).
749 * Usage szenario: create a text snapshot/backup of the current settings:
751 * => env export -t 100000
752 * => era ${backup_addr} +${filesize}
753 * => cp.b 100000 ${backup_addr} ${filesize}
755 * Re-import this snapshot, deleting all other settings:
757 * => env import -d -t ${backup_addr}
759 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
760 int argc, char * const argv[])
763 char *addr, *cmd, *res;
773 while (--argc > 0 && **++argv == '-') {
777 case 'b': /* raw binary format */
782 case 'c': /* external checksum format */
788 case 's': /* size given */
790 return cmd_usage(cmdtp);
791 size = simple_strtoul(*++argv, NULL, 16);
793 case 't': /* text format */
799 return CMD_RET_USAGE;
806 return CMD_RET_USAGE;
808 addr = (char *)simple_strtoul(argv[0], NULL, 16);
811 memset(addr, '\0', size);
816 if (sep) { /* export as text file */
817 len = hexport_r(&env_htab, sep, &addr, size, argc, argv);
819 error("Cannot export environment: errno = %d\n", errno);
822 sprintf(buf, "%zX", (size_t)len);
823 setenv("filesize", buf);
828 envp = (env_t *)addr;
830 if (chk) /* export as checksum protected block */
831 res = (char *)envp->data;
832 else /* export as raw binary data */
835 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, argc, argv);
837 error("Cannot export environment: errno = %d\n", errno);
842 envp->crc = crc32(0, envp->data, ENV_SIZE);
843 #ifdef CONFIG_ENV_ADDR_REDUND
844 envp->flags = ACTIVE_FLAG;
847 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
848 setenv("filesize", buf);
853 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
858 #ifdef CONFIG_CMD_IMPORTENV
860 * env import [-d] [-t | -b | -c] addr [size]
861 * -d: delete existing environment before importing;
862 * otherwise overwrite / append to existion definitions
863 * -t: assume text format; either "size" must be given or the
864 * text data must be '\0' terminated
865 * -b: assume binary format ('\0' separated, "\0\0" terminated)
866 * -c: assume checksum protected environment format
867 * addr: memory address to read from
868 * size: length of input data; if missing, proper '\0'
869 * termination is mandatory
871 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
872 int argc, char * const argv[])
883 while (--argc > 0 && **++argv == '-') {
887 case 'b': /* raw binary format */
892 case 'c': /* external checksum format */
898 case 't': /* text format */
907 return CMD_RET_USAGE;
913 return CMD_RET_USAGE;
916 printf("## Warning: defaulting to text format\n");
918 addr = (char *)simple_strtoul(argv[0], NULL, 16);
921 size = simple_strtoul(argv[1], NULL, 16);
927 while (size < MAX_ENV_SIZE) {
928 if ((*s == sep) && (*(s+1) == '\0'))
933 if (size == MAX_ENV_SIZE) {
934 printf("## Warning: Input data exceeds %d bytes"
935 " - truncated\n", MAX_ENV_SIZE);
938 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
943 env_t *ep = (env_t *)addr;
945 size -= offsetof(env_t, data);
946 memcpy(&crc, &ep->crc, sizeof(crc));
948 if (crc32(0, ep->data, size) != crc) {
949 puts("## Error: bad CRC, import failed\n");
952 addr = (char *)ep->data;
955 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
956 0, NULL, 0 /* do_apply */) == 0) {
957 error("Environment import failed: errno = %d\n", errno);
960 gd->flags |= GD_FLG_ENV_READY;
965 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
972 * New command line interface: "env" command with subcommands
974 static cmd_tbl_t cmd_env_sub[] = {
975 #if defined(CONFIG_CMD_ASKENV)
976 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
978 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
979 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
980 #if defined(CONFIG_CMD_EDITENV)
981 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
983 #if defined(CONFIG_CMD_EXPORTENV)
984 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
986 #if defined(CONFIG_CMD_GREPENV)
987 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
989 #if defined(CONFIG_CMD_IMPORTENV)
990 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
992 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
993 #if defined(CONFIG_CMD_RUN)
994 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
996 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
997 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
999 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1002 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1003 void env_reloc(void)
1005 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1009 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1014 return CMD_RET_USAGE;
1016 /* drop initial "env" arg */
1020 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1023 return cp->cmd(cmdtp, flag, argc, argv);
1025 return CMD_RET_USAGE;
1029 env, CONFIG_SYS_MAXARGS, 1, do_env,
1030 "environment handling commands",
1031 #if defined(CONFIG_CMD_ASKENV)
1032 "ask name [message] [size] - ask for environment variable\nenv "
1034 "default [-f] -a - [forcibly] reset default environment\n"
1035 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1036 #if defined(CONFIG_CMD_EDITENV)
1037 "env edit name - edit environment variable\n"
1039 #if defined(CONFIG_CMD_EXPORTENV)
1040 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1042 #if defined(CONFIG_CMD_GREPENV)
1043 "env grep string [...] - search environment\n"
1045 #if defined(CONFIG_CMD_IMPORTENV)
1046 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1048 "env print [name ...] - print environment\n"
1049 #if defined(CONFIG_CMD_RUN)
1050 "env run var [...] - run commands in an environment variable\n"
1052 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1053 "env save - save environment\n"
1055 "env set [-f] name [arg ...]\n"
1059 * Old command line interface, kept for compatibility
1062 #if defined(CONFIG_CMD_EDITENV)
1063 U_BOOT_CMD_COMPLETE(
1064 editenv, 2, 0, do_env_edit,
1065 "edit environment variable",
1067 " - edit environment variable 'name'",
1072 U_BOOT_CMD_COMPLETE(
1073 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1074 "print environment variables",
1075 "\n - print values of all environment variables\n"
1076 "printenv name ...\n"
1077 " - print value of environment variable 'name'",
1081 #ifdef CONFIG_CMD_GREPENV
1082 U_BOOT_CMD_COMPLETE(
1083 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1084 "search environment variables",
1086 " - list environment name=value pairs matching 'string'",
1091 U_BOOT_CMD_COMPLETE(
1092 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1093 "set environment variables",
1095 " - set environment variable 'name' to 'value ...'\n"
1097 " - delete environment variable 'name'",
1101 #if defined(CONFIG_CMD_ASKENV)
1104 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1105 "get environment variables from stdin",
1106 "name [message] [size]\n"
1107 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1109 " - get environment variable 'name' from stdin\n"
1110 "askenv name size\n"
1111 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1112 "askenv name [message] size\n"
1113 " - display 'message' string and get environment variable 'name'"
1114 "from stdin (max 'size' chars)"
1118 #if defined(CONFIG_CMD_RUN)
1119 U_BOOT_CMD_COMPLETE(
1120 run, CONFIG_SYS_MAXARGS, 1, do_run,
1121 "run commands in an environment variable",
1123 " - run the commands in the environment variable(s) 'var'",
1127 #endif /* CONFIG_SPL_BUILD */