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, int flag)
114 if (name) { /* print a single name */
119 hsearch_r(e, FIND, &ep, &env_htab, flag);
122 len = printf("%s=%s\n", ep->key, ep->data);
126 /* print whole list */
127 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
135 /* should never happen */
139 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
144 int env_flag = H_HIDE_DOT;
146 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
149 env_flag &= ~H_HIDE_DOT;
153 /* print all env vars */
154 rcode = env_print(NULL, env_flag);
157 printf("\nEnvironment size: %d/%ld bytes\n",
158 rcode, (ulong)ENV_SIZE);
162 /* print selected env vars */
163 env_flag &= ~H_HIDE_DOT;
164 for (i = 1; i < argc; ++i) {
165 int rc = env_print(argv[i], env_flag);
167 printf("## Error: \"%s\" not defined\n", argv[i]);
175 #ifdef CONFIG_CMD_GREPENV
176 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
177 int argc, char * const argv[])
180 unsigned char matched[env_htab.size / 8];
181 int rcode = 1, arg = 1, idx;
184 return CMD_RET_USAGE;
186 memset(matched, 0, env_htab.size / 8);
188 while (arg <= argc) {
190 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
191 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
197 matched[idx / 8] |= 1 << (idx & 7);
206 #endif /* CONFIG_SPL_BUILD */
209 * Perform consistency checking before setting, replacing, or deleting an
210 * environment variable, then (if successful) apply the changes to internals so
211 * to make them effective. Code for this function was taken out of
212 * _do_env_set(), which now calls it instead.
213 * Also called as a callback function by himport_r().
214 * Returns 0 in case of success, 1 in case of failure.
215 * When (flag & H_FORCE) is set, do not print out any error message and force
216 * overwriting of write-once variables.
219 int env_change_ok(const ENTRY *item, const char *newval, enum env_op op,
224 #if !defined(CONFIG_ENV_OVERWRITE) && defined(CONFIG_OVERWRITE_ETHADDR_ONCE) \
225 && defined(CONFIG_ETHADDR)
226 const char *oldval = NULL;
228 if (op != env_op_create)
234 /* Default value for NULL to protect string-manipulating functions */
235 newval = newval ? : "";
237 /* Check for console redirection */
238 if (strcmp(name, "stdin") == 0)
240 else if (strcmp(name, "stdout") == 0)
242 else if (strcmp(name, "stderr") == 0)
245 if (console != -1 && (gd->flags & GD_FLG_DEVINIT) != 0) {
246 if ((newval == NULL) || (*newval == '\0')) {
247 /* We cannot delete stdin/stdout/stderr */
248 if ((flag & H_FORCE) == 0)
249 printf("Can't delete \"%s\"\n", name);
253 #ifdef CONFIG_CONSOLE_MUX
254 if (iomux_doenv(console, newval))
257 /* Try assigning specified device */
258 if (console_assign(console, newval) < 0)
260 #endif /* CONFIG_CONSOLE_MUX */
263 #ifndef CONFIG_ENV_OVERWRITE
265 * Some variables like "ethaddr" and "serial#" can be set only once and
266 * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
268 if (op != env_op_create && /* variable exists */
269 (flag & H_FORCE) == 0) { /* and we are not forced */
270 if (strcmp(name, "serial#") == 0 ||
271 (strcmp(name, "ethaddr") == 0
272 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
273 && strcmp(oldval, __stringify(CONFIG_ETHADDR)) != 0
274 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
276 printf("Can't overwrite \"%s\"\n", name);
282 * When we change baudrate, or we are doing an env default -a
283 * (which will erase all variables prior to calling this),
284 * we want the baudrate to actually change - for real.
286 if (op != env_op_create || /* variable exists */
287 (flag & H_NOCLEAR) == 0) { /* or env is clear */
289 * Switch to new baudrate if new baudrate is supported
291 if (strcmp(name, "baudrate") == 0) {
292 int baudrate = simple_strtoul(newval, NULL, 10);
294 for (i = 0; i < N_BAUDRATES; ++i) {
295 if (baudrate == baudrate_table[i])
298 if (i == N_BAUDRATES) {
299 if ((flag & H_FORCE) == 0)
300 printf("## Baudrate %d bps not "
301 "supported\n", baudrate);
304 if (gd->baudrate == baudrate) {
305 /* If unchanged, we just say it's OK */
308 printf("## Switch baudrate to %d bps and"
309 "press ENTER ...\n", baudrate);
311 gd->baudrate = baudrate;
312 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
313 gd->bd->bi_baudrate = baudrate;
318 while (getc() != '\r')
324 * Some variables should be updated when the corresponding
325 * entry in the environment is changed
327 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 static 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);
362 if (argc < 3 || argv[2] == NULL) {
363 int rc = hdelete_r(name, &env_htab, H_INTERACTIVE);
368 * Insert / replace new value
370 for (i = 2, len = 0; i < argc; ++i)
371 len += strlen(argv[i]) + 1;
375 printf("## Can't malloc %d bytes\n", len);
378 for (i = 2, s = value; i < argc; ++i) {
381 while ((*s++ = *v++) != '\0')
390 hsearch_r(e, ENTER, &ep, &env_htab, H_INTERACTIVE);
393 printf("## Error inserting \"%s\" variable, errno=%d\n",
401 int setenv(const char *varname, const char *varvalue)
403 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
405 if (varvalue == NULL || varvalue[0] == '\0')
406 return _do_env_set(0, 2, (char * const *)argv);
408 return _do_env_set(0, 3, (char * const *)argv);
412 * Set an environment variable to an integer value
414 * @param varname Environmet variable to set
415 * @param value Value to set it to
416 * @return 0 if ok, 1 on error
418 int setenv_ulong(const char *varname, ulong value)
420 /* TODO: this should be unsigned */
421 char *str = simple_itoa(value);
423 return setenv(varname, str);
427 * Set an environment variable to an address in hex
429 * @param varname Environmet variable to set
430 * @param addr Value to set it to
431 * @return 0 if ok, 1 on error
433 int setenv_addr(const char *varname, const void *addr)
437 sprintf(str, "%lx", (uintptr_t)addr);
438 return setenv(varname, str);
441 #ifndef CONFIG_SPL_BUILD
442 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
445 return CMD_RET_USAGE;
447 return _do_env_set(flag, argc, argv);
451 * Prompt for environment variable
453 #if defined(CONFIG_CMD_ASKENV)
454 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
456 char message[CONFIG_SYS_CBSIZE];
457 int size = CONFIG_SYS_CBSIZE - 1;
461 local_args[0] = argv[0];
462 local_args[1] = argv[1];
463 local_args[2] = NULL;
464 local_args[3] = NULL;
466 /* Check the syntax */
469 return CMD_RET_USAGE;
471 case 2: /* env_ask envname */
472 sprintf(message, "Please enter '%s':", argv[1]);
475 case 3: /* env_ask envname size */
476 sprintf(message, "Please enter '%s':", argv[1]);
477 size = simple_strtoul(argv[2], NULL, 10);
480 default: /* env_ask envname message1 ... messagen size */
481 for (i = 2, pos = 0; i < argc - 1; i++) {
483 message[pos++] = ' ';
485 strcpy(message + pos, argv[i]);
486 pos += strlen(argv[i]);
490 size = simple_strtoul(argv[argc - 1], NULL, 10);
494 if (size >= CONFIG_SYS_CBSIZE)
495 size = CONFIG_SYS_CBSIZE - 1;
500 /* prompt for input */
501 len = readline(message);
504 console_buffer[size] = '\0';
507 if (console_buffer[0] != '\0') {
508 local_args[2] = console_buffer;
512 /* Continue calling setenv code */
513 return _do_env_set(flag, len, local_args);
518 * Interactively edit an environment variable
520 #if defined(CONFIG_CMD_EDITENV)
521 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
524 char buffer[CONFIG_SYS_CBSIZE];
528 return CMD_RET_USAGE;
530 /* Set read buffer to initial value or empty sting */
531 init_val = getenv(argv[1]);
533 sprintf(buffer, "%s", init_val);
537 readline_into_buffer("edit: ", buffer, 0);
539 return setenv(argv[1], buffer);
541 #endif /* CONFIG_CMD_EDITENV */
542 #endif /* CONFIG_SPL_BUILD */
545 * Look up variable from environment,
546 * return address of storage for that variable,
547 * or NULL if not found
549 char *getenv(const char *name)
551 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
558 hsearch_r(e, FIND, &ep, &env_htab, 0);
560 return ep ? ep->data : NULL;
563 /* restricted capabilities before import */
564 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
565 return (char *)(gd->env_buf);
571 * Look up variable from environment for restricted C runtime env.
573 int getenv_f(const char *name, char *buf, unsigned len)
577 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
580 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
581 if (nxt >= CONFIG_ENV_SIZE)
585 val = envmatch((uchar *)name, i);
589 /* found; copy out */
590 for (n = 0; n < len; ++n, ++buf) {
591 *buf = env_get_char(val++);
599 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
609 * Decode the integer value of an environment variable and return it.
611 * @param name Name of environemnt variable
612 * @param base Number base to use (normally 10, or 16 for hex)
613 * @param default_val Default value to return if the variable is not
615 * @return the decoded value, or default_val if not found
617 ulong getenv_ulong(const char *name, int base, ulong default_val)
620 * We can use getenv() here, even before relocation, since the
621 * environment variable value is an integer and thus short.
623 const char *str = getenv(name);
625 return str ? simple_strtoul(str, NULL, base) : default_val;
628 #ifndef CONFIG_SPL_BUILD
629 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
630 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
633 printf("Saving Environment to %s...\n", env_name_spec);
635 return saveenv() ? 1 : 0;
639 saveenv, 1, 0, do_env_save,
640 "save environment variables to persistent storage",
644 #endif /* CONFIG_SPL_BUILD */
648 * Match a name / name=value pair
650 * s1 is either a simple 'name', or a 'name=value' pair.
651 * i2 is the environment index for a 'name2=value2' pair.
652 * If the names match, return the index for the value2, else -1.
654 int envmatch(uchar *s1, int i2)
659 while (*s1 == env_get_char(i2++))
663 if (*s1 == '\0' && env_get_char(i2-1) == '=')
669 #ifndef CONFIG_SPL_BUILD
670 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
671 int argc, char * const argv[])
673 int all = 0, flag = 0;
675 debug("Initial value for argc=%d\n", argc);
676 while (--argc > 0 && **++argv == '-') {
681 case 'a': /* default all */
684 case 'f': /* force */
688 return cmd_usage(cmdtp);
692 debug("Final value for argc=%d\n", argc);
693 if (all && (argc == 0)) {
694 /* Reset the whole environment */
695 set_default_env("## Resetting to default environment\n");
698 if (!all && (argc > 0)) {
699 /* Reset individual variables */
700 set_default_vars(argc, argv);
704 return cmd_usage(cmdtp);
707 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
708 int argc, char * const argv[])
710 printf("Not implemented yet\n");
714 #ifdef CONFIG_CMD_EXPORTENV
716 * env export [-t | -b | -c] [-s size] addr [var ...]
717 * -t: export as text format; if size is given, data will be
718 * padded with '\0' bytes; if not, one terminating '\0'
719 * will be added (which is included in the "filesize"
720 * setting so you can for exmple copy this to flash and
721 * keep the termination).
722 * -b: export as binary format (name=value pairs separated by
723 * '\0', list end marked by double "\0\0")
724 * -c: export as checksum protected environment format as
725 * used for example by "saveenv" command
727 * size of output buffer
728 * addr: memory address where environment gets stored
729 * var... List of variable names that get included into the
730 * export. Without arguments, the whole environment gets
733 * With "-c" and size is NOT given, then the export command will
734 * format the data as currently used for the persistent storage,
735 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
736 * prepend a valid CRC32 checksum and, in case of resundant
737 * environment, a "current" redundancy flag. If size is given, this
738 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
739 * checksum and redundancy flag will be inserted.
741 * With "-b" and "-t", always only the real data (including a
742 * terminating '\0' byte) will be written; here the optional size
743 * argument will be used to make sure not to overflow the user
744 * provided buffer; the command will abort if the size is not
745 * sufficient. Any remainign space will be '\0' padded.
747 * On successful return, the variable "filesize" will be set.
748 * Note that filesize includes the trailing/terminating '\0' byte(s).
750 * Usage szenario: create a text snapshot/backup of the current settings:
752 * => env export -t 100000
753 * => era ${backup_addr} +${filesize}
754 * => cp.b 100000 ${backup_addr} ${filesize}
756 * Re-import this snapshot, deleting all other settings:
758 * => env import -d -t ${backup_addr}
760 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
761 int argc, char * const argv[])
764 char *addr, *cmd, *res;
774 while (--argc > 0 && **++argv == '-') {
778 case 'b': /* raw binary format */
783 case 'c': /* external checksum format */
789 case 's': /* size given */
791 return cmd_usage(cmdtp);
792 size = simple_strtoul(*++argv, NULL, 16);
794 case 't': /* text format */
800 return CMD_RET_USAGE;
807 return CMD_RET_USAGE;
809 addr = (char *)simple_strtoul(argv[0], NULL, 16);
812 memset(addr, '\0', size);
817 if (sep) { /* export as text file */
818 len = hexport_r(&env_htab, sep, 0, &addr, size, argc, argv);
820 error("Cannot export environment: errno = %d\n", errno);
823 sprintf(buf, "%zX", (size_t)len);
824 setenv("filesize", buf);
829 envp = (env_t *)addr;
831 if (chk) /* export as checksum protected block */
832 res = (char *)envp->data;
833 else /* export as raw binary data */
836 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, argc, argv);
838 error("Cannot export environment: errno = %d\n", errno);
843 envp->crc = crc32(0, envp->data, ENV_SIZE);
844 #ifdef CONFIG_ENV_ADDR_REDUND
845 envp->flags = ACTIVE_FLAG;
848 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
849 setenv("filesize", buf);
854 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
859 #ifdef CONFIG_CMD_IMPORTENV
861 * env import [-d] [-t | -b | -c] addr [size]
862 * -d: delete existing environment before importing;
863 * otherwise overwrite / append to existion definitions
864 * -t: assume text format; either "size" must be given or the
865 * text data must be '\0' terminated
866 * -b: assume binary format ('\0' separated, "\0\0" terminated)
867 * -c: assume checksum protected environment format
868 * addr: memory address to read from
869 * size: length of input data; if missing, proper '\0'
870 * termination is mandatory
872 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
873 int argc, char * const argv[])
884 while (--argc > 0 && **++argv == '-') {
888 case 'b': /* raw binary format */
893 case 'c': /* external checksum format */
899 case 't': /* text format */
908 return CMD_RET_USAGE;
914 return CMD_RET_USAGE;
917 printf("## Warning: defaulting to text format\n");
919 addr = (char *)simple_strtoul(argv[0], NULL, 16);
922 size = simple_strtoul(argv[1], NULL, 16);
928 while (size < MAX_ENV_SIZE) {
929 if ((*s == sep) && (*(s+1) == '\0'))
934 if (size == MAX_ENV_SIZE) {
935 printf("## Warning: Input data exceeds %d bytes"
936 " - truncated\n", MAX_ENV_SIZE);
939 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
944 env_t *ep = (env_t *)addr;
946 size -= offsetof(env_t, data);
947 memcpy(&crc, &ep->crc, sizeof(crc));
949 if (crc32(0, ep->data, size) != crc) {
950 puts("## Error: bad CRC, import failed\n");
953 addr = (char *)ep->data;
956 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
958 error("Environment import failed: errno = %d\n", errno);
961 gd->flags |= GD_FLG_ENV_READY;
966 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
973 * New command line interface: "env" command with subcommands
975 static cmd_tbl_t cmd_env_sub[] = {
976 #if defined(CONFIG_CMD_ASKENV)
977 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
979 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
980 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
981 #if defined(CONFIG_CMD_EDITENV)
982 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
984 #if defined(CONFIG_CMD_EXPORTENV)
985 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
987 #if defined(CONFIG_CMD_GREPENV)
988 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
990 #if defined(CONFIG_CMD_IMPORTENV)
991 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
993 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
994 #if defined(CONFIG_CMD_RUN)
995 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
997 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
998 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1000 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1003 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1004 void env_reloc(void)
1006 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1010 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1015 return CMD_RET_USAGE;
1017 /* drop initial "env" arg */
1021 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1024 return cp->cmd(cmdtp, flag, argc, argv);
1026 return CMD_RET_USAGE;
1029 #ifdef CONFIG_SYS_LONGHELP
1030 static char env_help_text[] =
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 [-a | 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 env, CONFIG_SYS_MAXARGS, 1, do_env,
1060 "environment handling commands", env_help_text
1064 * Old command line interface, kept for compatibility
1067 #if defined(CONFIG_CMD_EDITENV)
1068 U_BOOT_CMD_COMPLETE(
1069 editenv, 2, 0, do_env_edit,
1070 "edit environment variable",
1072 " - edit environment variable 'name'",
1077 U_BOOT_CMD_COMPLETE(
1078 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1079 "print environment variables",
1080 "[-a]\n - print [all] values of all environment variables\n"
1081 "printenv name ...\n"
1082 " - print value of environment variable 'name'",
1086 #ifdef CONFIG_CMD_GREPENV
1087 U_BOOT_CMD_COMPLETE(
1088 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1089 "search environment variables",
1091 " - list environment name=value pairs matching 'string'",
1096 U_BOOT_CMD_COMPLETE(
1097 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1098 "set environment variables",
1100 " - set environment variable 'name' to 'value ...'\n"
1102 " - delete environment variable 'name'",
1106 #if defined(CONFIG_CMD_ASKENV)
1109 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1110 "get environment variables from stdin",
1111 "name [message] [size]\n"
1112 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1114 " - get environment variable 'name' from stdin\n"
1115 "askenv name size\n"
1116 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1117 "askenv name [message] size\n"
1118 " - display 'message' string and get environment variable 'name'"
1119 "from stdin (max 'size' chars)"
1123 #if defined(CONFIG_CMD_RUN)
1124 U_BOOT_CMD_COMPLETE(
1125 run, CONFIG_SYS_MAXARGS, 1, do_run,
1126 "run commands in an environment variable",
1128 " - run the commands in the environment variable(s) 'var'",
1132 #endif /* CONFIG_SPL_BUILD */