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>
54 DECLARE_GLOBAL_DATA_PTR;
56 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
57 !defined(CONFIG_ENV_IS_IN_FLASH) && \
58 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
59 !defined(CONFIG_ENV_IS_IN_MMC) && \
60 !defined(CONFIG_ENV_IS_IN_FAT) && \
61 !defined(CONFIG_ENV_IS_IN_NAND) && \
62 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
63 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
64 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
65 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
66 !defined(CONFIG_ENV_IS_NOWHERE)
67 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
68 SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
72 * Maximum expected input data size for import command
74 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
76 ulong load_addr = CONFIG_SYS_LOAD_ADDR; /* Default Load Address */
77 ulong save_addr; /* Default Save Address */
78 ulong save_size; /* Default Save Size (in bytes) */
81 * This variable is incremented on each do_env_set(), so it can
82 * be used via get_env_id() as an indication, if the environment
83 * has changed or not. So it is possible to reread an environment
84 * variable only if the environment was changed ... done so for
85 * example in NetInitLoop()
87 static int env_id = 1;
94 #ifndef CONFIG_SPL_BUILD
96 * Command interface: print one or all environment variables
98 * Returns 0 in case of error, or length of printed string
100 static int env_print(char *name, int flag)
105 if (name) { /* print a single name */
110 hsearch_r(e, FIND, &ep, &env_htab, flag);
113 len = printf("%s=%s\n", ep->key, ep->data);
117 /* print whole list */
118 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
126 /* should never happen */
130 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
135 int env_flag = H_HIDE_DOT;
137 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
140 env_flag &= ~H_HIDE_DOT;
144 /* print all env vars */
145 rcode = env_print(NULL, env_flag);
148 printf("\nEnvironment size: %d/%ld bytes\n",
149 rcode, (ulong)ENV_SIZE);
153 /* print selected env vars */
154 env_flag &= ~H_HIDE_DOT;
155 for (i = 1; i < argc; ++i) {
156 int rc = env_print(argv[i], env_flag);
158 printf("## Error: \"%s\" not defined\n", argv[i]);
166 #ifdef CONFIG_CMD_GREPENV
167 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
168 int argc, char * const argv[])
171 unsigned char matched[env_htab.size / 8];
172 int rcode = 1, arg = 1, idx;
175 return CMD_RET_USAGE;
177 memset(matched, 0, env_htab.size / 8);
179 while (arg <= argc) {
181 while ((idx = hstrstr_r(argv[arg], idx, &match, &env_htab))) {
182 if (!(matched[idx / 8] & (1 << (idx & 7)))) {
188 matched[idx / 8] |= 1 << (idx & 7);
197 #endif /* CONFIG_SPL_BUILD */
200 * Perform consistency checking before setting, replacing, or deleting an
201 * environment variable, then (if successful) apply the changes to internals so
202 * to make them effective. Code for this function was taken out of
203 * _do_env_set(), which now calls it instead.
204 * Also called as a callback function by himport_r().
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_change_ok(const ENTRY *item, const char *newval, enum env_op op,
215 #if !defined(CONFIG_ENV_OVERWRITE) && defined(CONFIG_OVERWRITE_ETHADDR_ONCE) \
216 && defined(CONFIG_ETHADDR)
217 const char *oldval = NULL;
219 if (op != env_op_create)
225 /* Default value for NULL to protect string-manipulating functions */
226 newval = newval ? : "";
228 /* Check for console redirection */
229 if (strcmp(name, "stdin") == 0)
231 else if (strcmp(name, "stdout") == 0)
233 else if (strcmp(name, "stderr") == 0)
236 if (console != -1 && (gd->flags & GD_FLG_DEVINIT) != 0) {
237 if ((newval == NULL) || (*newval == '\0')) {
238 /* We cannot delete stdin/stdout/stderr */
239 if ((flag & H_FORCE) == 0)
240 printf("Can't delete \"%s\"\n", name);
244 #ifdef CONFIG_CONSOLE_MUX
245 if (iomux_doenv(console, newval))
248 /* Try assigning specified device */
249 if (console_assign(console, newval) < 0)
251 #endif /* CONFIG_CONSOLE_MUX */
254 #ifndef CONFIG_ENV_OVERWRITE
256 * Some variables like "ethaddr" and "serial#" can be set only once and
257 * cannot be deleted, unless CONFIG_ENV_OVERWRITE is defined.
259 if (op != env_op_create && /* variable exists */
260 (flag & H_FORCE) == 0) { /* and we are not forced */
261 if (strcmp(name, "serial#") == 0 ||
262 (strcmp(name, "ethaddr") == 0
263 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
264 && strcmp(oldval, __stringify(CONFIG_ETHADDR)) != 0
265 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
267 printf("Can't overwrite \"%s\"\n", name);
274 * Some variables should be updated when the corresponding
275 * entry in the environment is changed
277 if (strcmp(name, "loadaddr") == 0) {
278 load_addr = simple_strtoul(newval, NULL, 16);
285 * Set a new environment variable,
286 * or replace or delete an existing one.
288 static int _do_env_set(int flag, int argc, char * const argv[])
291 char *name, *value, *s;
297 if (strchr(name, '=')) {
298 printf("## Error: illegal character '='"
299 "in variable name \"%s\"\n", name);
306 if (argc < 3 || argv[2] == NULL) {
307 int rc = hdelete_r(name, &env_htab, H_INTERACTIVE);
312 * Insert / replace new value
314 for (i = 2, len = 0; i < argc; ++i)
315 len += strlen(argv[i]) + 1;
319 printf("## Can't malloc %d bytes\n", len);
322 for (i = 2, s = value; i < argc; ++i) {
325 while ((*s++ = *v++) != '\0')
334 hsearch_r(e, ENTER, &ep, &env_htab, H_INTERACTIVE);
337 printf("## Error inserting \"%s\" variable, errno=%d\n",
345 int setenv(const char *varname, const char *varvalue)
347 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
349 if (varvalue == NULL || varvalue[0] == '\0')
350 return _do_env_set(0, 2, (char * const *)argv);
352 return _do_env_set(0, 3, (char * const *)argv);
356 * Set an environment variable to an integer value
358 * @param varname Environmet variable to set
359 * @param value Value to set it to
360 * @return 0 if ok, 1 on error
362 int setenv_ulong(const char *varname, ulong value)
364 /* TODO: this should be unsigned */
365 char *str = simple_itoa(value);
367 return setenv(varname, str);
371 * Set an environment variable to an address in hex
373 * @param varname Environmet variable to set
374 * @param addr Value to set it to
375 * @return 0 if ok, 1 on error
377 int setenv_addr(const char *varname, const void *addr)
381 sprintf(str, "%lx", (uintptr_t)addr);
382 return setenv(varname, str);
385 #ifndef CONFIG_SPL_BUILD
386 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
389 return CMD_RET_USAGE;
391 return _do_env_set(flag, argc, argv);
395 * Prompt for environment variable
397 #if defined(CONFIG_CMD_ASKENV)
398 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
400 char message[CONFIG_SYS_CBSIZE];
401 int size = CONFIG_SYS_CBSIZE - 1;
405 local_args[0] = argv[0];
406 local_args[1] = argv[1];
407 local_args[2] = NULL;
408 local_args[3] = NULL;
410 /* Check the syntax */
413 return CMD_RET_USAGE;
415 case 2: /* env_ask envname */
416 sprintf(message, "Please enter '%s':", argv[1]);
419 case 3: /* env_ask envname size */
420 sprintf(message, "Please enter '%s':", argv[1]);
421 size = simple_strtoul(argv[2], NULL, 10);
424 default: /* env_ask envname message1 ... messagen size */
425 for (i = 2, pos = 0; i < argc - 1; i++) {
427 message[pos++] = ' ';
429 strcpy(message + pos, argv[i]);
430 pos += strlen(argv[i]);
434 size = simple_strtoul(argv[argc - 1], NULL, 10);
438 if (size >= CONFIG_SYS_CBSIZE)
439 size = CONFIG_SYS_CBSIZE - 1;
444 /* prompt for input */
445 len = readline(message);
448 console_buffer[size] = '\0';
451 if (console_buffer[0] != '\0') {
452 local_args[2] = console_buffer;
456 /* Continue calling setenv code */
457 return _do_env_set(flag, len, local_args);
461 #if defined(CONFIG_CMD_ENV_CALLBACK)
462 static int print_static_binding(const char *var_name, const char *callback_name)
464 printf("\t%-20s %-20s\n", var_name, callback_name);
469 static int print_active_callback(ENTRY *entry)
471 struct env_clbk_tbl *clbkp;
475 if (entry->callback == NULL)
478 /* look up the callback in the linker-list */
479 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
480 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
483 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
484 if (entry->callback == clbkp->callback + gd->reloc_off)
486 if (entry->callback == clbkp->callback)
491 if (i == num_callbacks)
492 /* this should probably never happen, but just in case... */
493 printf("\t%-20s %p\n", entry->key, entry->callback);
495 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
501 * Print the callbacks available and what they are bound to
503 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
505 struct env_clbk_tbl *clbkp;
509 /* Print the available callbacks */
510 puts("Available callbacks:\n");
511 puts("\tCallback Name\n");
512 puts("\t-------------\n");
513 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
514 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
517 printf("\t%s\n", clbkp->name);
520 /* Print the static bindings that may exist */
521 puts("Static callback bindings:\n");
522 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
523 printf("\t%-20s %-20s\n", "-------------", "-------------");
524 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding);
527 /* walk through each variable and print the callback if it has one */
528 puts("Active callback bindings:\n");
529 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
530 printf("\t%-20s %-20s\n", "-------------", "-------------");
531 hwalk_r(&env_htab, print_active_callback);
537 * Interactively edit an environment variable
539 #if defined(CONFIG_CMD_EDITENV)
540 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
543 char buffer[CONFIG_SYS_CBSIZE];
547 return CMD_RET_USAGE;
549 /* Set read buffer to initial value or empty sting */
550 init_val = getenv(argv[1]);
552 sprintf(buffer, "%s", init_val);
556 readline_into_buffer("edit: ", buffer, 0);
558 return setenv(argv[1], buffer);
560 #endif /* CONFIG_CMD_EDITENV */
561 #endif /* CONFIG_SPL_BUILD */
564 * Look up variable from environment,
565 * return address of storage for that variable,
566 * or NULL if not found
568 char *getenv(const char *name)
570 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
577 hsearch_r(e, FIND, &ep, &env_htab, 0);
579 return ep ? ep->data : NULL;
582 /* restricted capabilities before import */
583 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
584 return (char *)(gd->env_buf);
590 * Look up variable from environment for restricted C runtime env.
592 int getenv_f(const char *name, char *buf, unsigned len)
596 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
599 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
600 if (nxt >= CONFIG_ENV_SIZE)
604 val = envmatch((uchar *)name, i);
608 /* found; copy out */
609 for (n = 0; n < len; ++n, ++buf) {
610 *buf = env_get_char(val++);
618 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
628 * Decode the integer value of an environment variable and return it.
630 * @param name Name of environemnt variable
631 * @param base Number base to use (normally 10, or 16 for hex)
632 * @param default_val Default value to return if the variable is not
634 * @return the decoded value, or default_val if not found
636 ulong getenv_ulong(const char *name, int base, ulong default_val)
639 * We can use getenv() here, even before relocation, since the
640 * environment variable value is an integer and thus short.
642 const char *str = getenv(name);
644 return str ? simple_strtoul(str, NULL, base) : default_val;
647 #ifndef CONFIG_SPL_BUILD
648 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
649 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
652 printf("Saving Environment to %s...\n", env_name_spec);
654 return saveenv() ? 1 : 0;
658 saveenv, 1, 0, do_env_save,
659 "save environment variables to persistent storage",
663 #endif /* CONFIG_SPL_BUILD */
667 * Match a name / name=value pair
669 * s1 is either a simple 'name', or a 'name=value' pair.
670 * i2 is the environment index for a 'name2=value2' pair.
671 * If the names match, return the index for the value2, else -1.
673 int envmatch(uchar *s1, int i2)
678 while (*s1 == env_get_char(i2++))
682 if (*s1 == '\0' && env_get_char(i2-1) == '=')
688 #ifndef CONFIG_SPL_BUILD
689 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
690 int argc, char * const argv[])
692 int all = 0, flag = 0;
694 debug("Initial value for argc=%d\n", argc);
695 while (--argc > 0 && **++argv == '-') {
700 case 'a': /* default all */
703 case 'f': /* force */
707 return cmd_usage(cmdtp);
711 debug("Final value for argc=%d\n", argc);
712 if (all && (argc == 0)) {
713 /* Reset the whole environment */
714 set_default_env("## Resetting to default environment\n");
717 if (!all && (argc > 0)) {
718 /* Reset individual variables */
719 set_default_vars(argc, argv);
723 return cmd_usage(cmdtp);
726 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
727 int argc, char * const argv[])
729 printf("Not implemented yet\n");
733 #ifdef CONFIG_CMD_EXPORTENV
735 * env export [-t | -b | -c] [-s size] addr [var ...]
736 * -t: export as text format; if size is given, data will be
737 * padded with '\0' bytes; if not, one terminating '\0'
738 * will be added (which is included in the "filesize"
739 * setting so you can for exmple copy this to flash and
740 * keep the termination).
741 * -b: export as binary format (name=value pairs separated by
742 * '\0', list end marked by double "\0\0")
743 * -c: export as checksum protected environment format as
744 * used for example by "saveenv" command
746 * size of output buffer
747 * addr: memory address where environment gets stored
748 * var... List of variable names that get included into the
749 * export. Without arguments, the whole environment gets
752 * With "-c" and size is NOT given, then the export command will
753 * format the data as currently used for the persistent storage,
754 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
755 * prepend a valid CRC32 checksum and, in case of resundant
756 * environment, a "current" redundancy flag. If size is given, this
757 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
758 * checksum and redundancy flag will be inserted.
760 * With "-b" and "-t", always only the real data (including a
761 * terminating '\0' byte) will be written; here the optional size
762 * argument will be used to make sure not to overflow the user
763 * provided buffer; the command will abort if the size is not
764 * sufficient. Any remainign space will be '\0' padded.
766 * On successful return, the variable "filesize" will be set.
767 * Note that filesize includes the trailing/terminating '\0' byte(s).
769 * Usage szenario: create a text snapshot/backup of the current settings:
771 * => env export -t 100000
772 * => era ${backup_addr} +${filesize}
773 * => cp.b 100000 ${backup_addr} ${filesize}
775 * Re-import this snapshot, deleting all other settings:
777 * => env import -d -t ${backup_addr}
779 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
780 int argc, char * const argv[])
783 char *addr, *cmd, *res;
793 while (--argc > 0 && **++argv == '-') {
797 case 'b': /* raw binary format */
802 case 'c': /* external checksum format */
808 case 's': /* size given */
810 return cmd_usage(cmdtp);
811 size = simple_strtoul(*++argv, NULL, 16);
813 case 't': /* text format */
819 return CMD_RET_USAGE;
826 return CMD_RET_USAGE;
828 addr = (char *)simple_strtoul(argv[0], NULL, 16);
831 memset(addr, '\0', size);
836 if (sep) { /* export as text file */
837 len = hexport_r(&env_htab, sep, 0, &addr, size, argc, argv);
839 error("Cannot export environment: errno = %d\n", errno);
842 sprintf(buf, "%zX", (size_t)len);
843 setenv("filesize", buf);
848 envp = (env_t *)addr;
850 if (chk) /* export as checksum protected block */
851 res = (char *)envp->data;
852 else /* export as raw binary data */
855 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, argc, argv);
857 error("Cannot export environment: errno = %d\n", errno);
862 envp->crc = crc32(0, envp->data, ENV_SIZE);
863 #ifdef CONFIG_ENV_ADDR_REDUND
864 envp->flags = ACTIVE_FLAG;
867 sprintf(buf, "%zX", (size_t)(len + offsetof(env_t, data)));
868 setenv("filesize", buf);
873 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
878 #ifdef CONFIG_CMD_IMPORTENV
880 * env import [-d] [-t | -b | -c] addr [size]
881 * -d: delete existing environment before importing;
882 * otherwise overwrite / append to existion definitions
883 * -t: assume text format; either "size" must be given or the
884 * text data must be '\0' terminated
885 * -b: assume binary format ('\0' separated, "\0\0" terminated)
886 * -c: assume checksum protected environment format
887 * addr: memory address to read from
888 * size: length of input data; if missing, proper '\0'
889 * termination is mandatory
891 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
892 int argc, char * const argv[])
903 while (--argc > 0 && **++argv == '-') {
907 case 'b': /* raw binary format */
912 case 'c': /* external checksum format */
918 case 't': /* text format */
927 return CMD_RET_USAGE;
933 return CMD_RET_USAGE;
936 printf("## Warning: defaulting to text format\n");
938 addr = (char *)simple_strtoul(argv[0], NULL, 16);
941 size = simple_strtoul(argv[1], NULL, 16);
947 while (size < MAX_ENV_SIZE) {
948 if ((*s == sep) && (*(s+1) == '\0'))
953 if (size == MAX_ENV_SIZE) {
954 printf("## Warning: Input data exceeds %d bytes"
955 " - truncated\n", MAX_ENV_SIZE);
958 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
963 env_t *ep = (env_t *)addr;
965 size -= offsetof(env_t, data);
966 memcpy(&crc, &ep->crc, sizeof(crc));
968 if (crc32(0, ep->data, size) != crc) {
969 puts("## Error: bad CRC, import failed\n");
972 addr = (char *)ep->data;
975 if (himport_r(&env_htab, addr, size, sep, del ? 0 : H_NOCLEAR,
977 error("Environment import failed: errno = %d\n", errno);
980 gd->flags |= GD_FLG_ENV_READY;
985 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
992 * New command line interface: "env" command with subcommands
994 static cmd_tbl_t cmd_env_sub[] = {
995 #if defined(CONFIG_CMD_ASKENV)
996 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
998 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
999 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete, "", ""),
1000 #if defined(CONFIG_CMD_EDITENV)
1001 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1003 #if defined(CONFIG_CMD_ENV_CALLBACK)
1004 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1006 #if defined(CONFIG_CMD_EXPORTENV)
1007 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1009 #if defined(CONFIG_CMD_GREPENV)
1010 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1012 #if defined(CONFIG_CMD_IMPORTENV)
1013 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1015 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1016 #if defined(CONFIG_CMD_RUN)
1017 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1019 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1020 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1022 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1025 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1026 void env_reloc(void)
1028 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1032 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1037 return CMD_RET_USAGE;
1039 /* drop initial "env" arg */
1043 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1046 return cp->cmd(cmdtp, flag, argc, argv);
1048 return CMD_RET_USAGE;
1051 #ifdef CONFIG_SYS_LONGHELP
1052 static char env_help_text[] =
1053 #if defined(CONFIG_CMD_ASKENV)
1054 "ask name [message] [size] - ask for environment variable\nenv "
1056 #if defined(CONFIG_CMD_ENV_CALLBACK)
1057 "callbacks - print callbacks and their associated variables\nenv "
1059 "default [-f] -a - [forcibly] reset default environment\n"
1060 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1061 #if defined(CONFIG_CMD_EDITENV)
1062 "env edit name - edit environment variable\n"
1064 #if defined(CONFIG_CMD_EXPORTENV)
1065 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1067 #if defined(CONFIG_CMD_GREPENV)
1068 "env grep string [...] - search environment\n"
1070 #if defined(CONFIG_CMD_IMPORTENV)
1071 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1073 "env print [-a | name ...] - print environment\n"
1074 #if defined(CONFIG_CMD_RUN)
1075 "env run var [...] - run commands in an environment variable\n"
1077 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1078 "env save - save environment\n"
1080 "env set [-f] name [arg ...]\n";
1084 env, CONFIG_SYS_MAXARGS, 1, do_env,
1085 "environment handling commands", env_help_text
1089 * Old command line interface, kept for compatibility
1092 #if defined(CONFIG_CMD_EDITENV)
1093 U_BOOT_CMD_COMPLETE(
1094 editenv, 2, 0, do_env_edit,
1095 "edit environment variable",
1097 " - edit environment variable 'name'",
1102 U_BOOT_CMD_COMPLETE(
1103 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1104 "print environment variables",
1105 "[-a]\n - print [all] values of all environment variables\n"
1106 "printenv name ...\n"
1107 " - print value of environment variable 'name'",
1111 #ifdef CONFIG_CMD_GREPENV
1112 U_BOOT_CMD_COMPLETE(
1113 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1114 "search environment variables",
1116 " - list environment name=value pairs matching 'string'",
1121 U_BOOT_CMD_COMPLETE(
1122 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1123 "set environment variables",
1125 " - set environment variable 'name' to 'value ...'\n"
1127 " - delete environment variable 'name'",
1131 #if defined(CONFIG_CMD_ASKENV)
1134 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1135 "get environment variables from stdin",
1136 "name [message] [size]\n"
1137 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1139 " - get environment variable 'name' from stdin\n"
1140 "askenv name size\n"
1141 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1142 "askenv name [message] size\n"
1143 " - display 'message' string and get environment variable 'name'"
1144 "from stdin (max 'size' chars)"
1148 #if defined(CONFIG_CMD_RUN)
1149 U_BOOT_CMD_COMPLETE(
1150 run, CONFIG_SYS_MAXARGS, 1, do_run,
1151 "run commands in an environment variable",
1153 " - run the commands in the environment variable(s) 'var'",
1157 #endif /* CONFIG_SPL_BUILD */