2 * (C) Copyright 2000-2013
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 * SPDX-License-Identifier: GPL-2.0+
14 * Support for persistent environment data
16 * The "environment" is stored on external storage as a list of '\0'
17 * terminated "name=value" strings. The end of the list is marked by
18 * a double '\0'. The environment is preceded by a 32 bit CRC over
19 * the data part and, in case of redundant environment, a byte of
22 * This linearized representation will also be used before
23 * relocation, i. e. as long as we don't have a full C runtime
24 * environment. After that, we use a hash table.
31 #include <environment.h>
37 #include <linux/stddef.h>
38 #include <asm/byteorder.h>
41 DECLARE_GLOBAL_DATA_PTR;
43 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
44 !defined(CONFIG_ENV_IS_IN_FLASH) && \
45 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
46 !defined(CONFIG_ENV_IS_IN_MMC) && \
47 !defined(CONFIG_ENV_IS_IN_FAT) && \
48 !defined(CONFIG_ENV_IS_IN_EXT4) && \
49 !defined(CONFIG_ENV_IS_IN_NAND) && \
50 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
51 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
52 !defined(CONFIG_ENV_IS_IN_SATA) && \
53 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
54 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
55 !defined(CONFIG_ENV_IS_IN_UBI) && \
56 !defined(CONFIG_ENV_IS_NOWHERE)
57 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
58 SATA|SPI_FLASH|NVRAM|MMC|FAT|EXT4|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
62 * Maximum expected input data size for import command
64 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
67 * This variable is incremented on each do_env_set(), so it can
68 * be used via get_env_id() as an indication, if the environment
69 * has changed or not. So it is possible to reread an environment
70 * variable only if the environment was changed ... done so for
71 * example in NetInitLoop()
73 static int env_id = 1;
80 #ifndef CONFIG_SPL_BUILD
82 * Command interface: print one or all environment variables
84 * Returns 0 in case of error, or length of printed string
86 static int env_print(char *name, int flag)
91 if (name) { /* print a single name */
96 hsearch_r(e, FIND, &ep, &env_htab, flag);
99 len = printf("%s=%s\n", ep->key, ep->data);
103 /* print whole list */
104 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
112 /* should never happen */
113 printf("## Error: cannot export environment\n");
117 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
122 int env_flag = H_HIDE_DOT;
124 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
127 env_flag &= ~H_HIDE_DOT;
131 /* print all env vars */
132 rcode = env_print(NULL, env_flag);
135 printf("\nEnvironment size: %d/%ld bytes\n",
136 rcode, (ulong)ENV_SIZE);
140 /* print selected env vars */
141 env_flag &= ~H_HIDE_DOT;
142 for (i = 1; i < argc; ++i) {
143 int rc = env_print(argv[i], env_flag);
145 printf("## Error: \"%s\" not defined\n", argv[i]);
153 #ifdef CONFIG_CMD_GREPENV
154 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
155 int argc, char * const argv[])
158 int len, grep_how, grep_what;
161 return CMD_RET_USAGE;
163 grep_how = H_MATCH_SUBSTR; /* default: substring search */
164 grep_what = H_MATCH_BOTH; /* default: grep names and values */
166 while (--argc > 0 && **++argv == '-') {
171 case 'e': /* use regex matching */
172 grep_how = H_MATCH_REGEX;
175 case 'n': /* grep for name */
176 grep_what = H_MATCH_KEY;
178 case 'v': /* grep for value */
179 grep_what = H_MATCH_DATA;
181 case 'b': /* grep for both */
182 grep_what = H_MATCH_BOTH;
187 return CMD_RET_USAGE;
193 len = hexport_r(&env_htab, '\n',
194 flag | grep_what | grep_how,
195 &res, 0, argc, argv);
208 #endif /* CONFIG_SPL_BUILD */
211 * Set a new environment variable,
212 * or replace or delete an existing one.
214 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
217 char *name, *value, *s;
220 debug("Initial value for argc=%d\n", argc);
221 while (argc > 1 && **(argv + 1) == '-') {
227 case 'f': /* force */
231 return CMD_RET_USAGE;
235 debug("Final value for argc=%d\n", argc);
239 if (strchr(name, '=')) {
240 printf("## Error: illegal character '='"
241 "in variable name \"%s\"\n", name);
248 if (argc < 3 || argv[2] == NULL) {
249 int rc = hdelete_r(name, &env_htab, env_flag);
254 * Insert / replace new value
256 for (i = 2, len = 0; i < argc; ++i)
257 len += strlen(argv[i]) + 1;
261 printf("## Can't malloc %d bytes\n", len);
264 for (i = 2, s = value; i < argc; ++i) {
267 while ((*s++ = *v++) != '\0')
276 hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
279 printf("## Error inserting \"%s\" variable, errno=%d\n",
287 int setenv(const char *varname, const char *varvalue)
289 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
291 /* before import into hashtable */
292 if (!(gd->flags & GD_FLG_ENV_READY))
295 if (varvalue == NULL || varvalue[0] == '\0')
296 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
298 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
302 * Set an environment variable to an integer value
304 * @param varname Environment variable to set
305 * @param value Value to set it to
306 * @return 0 if ok, 1 on error
308 int setenv_ulong(const char *varname, ulong value)
310 /* TODO: this should be unsigned */
311 char *str = simple_itoa(value);
313 return setenv(varname, str);
317 * Set an environment variable to an value in hex
319 * @param varname Environment variable to set
320 * @param value Value to set it to
321 * @return 0 if ok, 1 on error
323 int setenv_hex(const char *varname, ulong value)
327 sprintf(str, "%lx", value);
328 return setenv(varname, str);
331 ulong getenv_hex(const char *varname, ulong default_val)
339 value = simple_strtoul(s, &endp, 16);
346 #ifndef CONFIG_SPL_BUILD
347 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
350 return CMD_RET_USAGE;
352 return _do_env_set(flag, argc, argv, H_INTERACTIVE);
356 * Prompt for environment variable
358 #if defined(CONFIG_CMD_ASKENV)
359 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
361 char message[CONFIG_SYS_CBSIZE];
362 int i, len, pos, size;
366 local_args[0] = argv[0];
367 local_args[1] = argv[1];
368 local_args[2] = NULL;
369 local_args[3] = NULL;
374 * env_ask envname [message1 ...] [size]
377 return CMD_RET_USAGE;
380 * We test the last argument if it can be converted
381 * into a decimal number. If yes, we assume it's
382 * the size. Otherwise we echo it as part of the
385 i = simple_strtoul(argv[argc - 1], &endptr, 10);
386 if (*endptr != '\0') { /* no size */
387 size = CONFIG_SYS_CBSIZE - 1;
388 } else { /* size given */
394 sprintf(message, "Please enter '%s': ", argv[1]);
396 /* env_ask envname message1 ... messagen [size] */
397 for (i = 2, pos = 0; i < argc; i++) {
399 message[pos++] = ' ';
401 strcpy(message + pos, argv[i]);
402 pos += strlen(argv[i]);
404 message[pos++] = ' ';
408 if (size >= CONFIG_SYS_CBSIZE)
409 size = CONFIG_SYS_CBSIZE - 1;
414 /* prompt for input */
415 len = cli_readline(message);
418 console_buffer[size] = '\0';
421 if (console_buffer[0] != '\0') {
422 local_args[2] = console_buffer;
426 /* Continue calling setenv code */
427 return _do_env_set(flag, len, local_args, H_INTERACTIVE);
431 #if defined(CONFIG_CMD_ENV_CALLBACK)
432 static int print_static_binding(const char *var_name, const char *callback_name,
435 printf("\t%-20s %-20s\n", var_name, callback_name);
440 static int print_active_callback(ENTRY *entry)
442 struct env_clbk_tbl *clbkp;
446 if (entry->callback == NULL)
449 /* look up the callback in the linker-list */
450 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
451 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
454 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
455 if (entry->callback == clbkp->callback + gd->reloc_off)
457 if (entry->callback == clbkp->callback)
462 if (i == num_callbacks)
463 /* this should probably never happen, but just in case... */
464 printf("\t%-20s %p\n", entry->key, entry->callback);
466 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
472 * Print the callbacks available and what they are bound to
474 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
476 struct env_clbk_tbl *clbkp;
480 /* Print the available callbacks */
481 puts("Available callbacks:\n");
482 puts("\tCallback Name\n");
483 puts("\t-------------\n");
484 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
485 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
488 printf("\t%s\n", clbkp->name);
491 /* Print the static bindings that may exist */
492 puts("Static callback bindings:\n");
493 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
494 printf("\t%-20s %-20s\n", "-------------", "-------------");
495 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
498 /* walk through each variable and print the callback if it has one */
499 puts("Active callback bindings:\n");
500 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
501 printf("\t%-20s %-20s\n", "-------------", "-------------");
502 hwalk_r(&env_htab, print_active_callback);
507 #if defined(CONFIG_CMD_ENV_FLAGS)
508 static int print_static_flags(const char *var_name, const char *flags,
511 enum env_flags_vartype type = env_flags_parse_vartype(flags);
512 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
514 printf("\t%-20s %-20s %-20s\n", var_name,
515 env_flags_get_vartype_name(type),
516 env_flags_get_varaccess_name(access));
521 static int print_active_flags(ENTRY *entry)
523 enum env_flags_vartype type;
524 enum env_flags_varaccess access;
526 if (entry->flags == 0)
529 type = (enum env_flags_vartype)
530 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
531 access = env_flags_parse_varaccess_from_binflags(entry->flags);
532 printf("\t%-20s %-20s %-20s\n", entry->key,
533 env_flags_get_vartype_name(type),
534 env_flags_get_varaccess_name(access));
540 * Print the flags available and what variables have flags
542 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
544 /* Print the available variable types */
545 printf("Available variable type flags (position %d):\n",
546 ENV_FLAGS_VARTYPE_LOC);
547 puts("\tFlag\tVariable Type Name\n");
548 puts("\t----\t------------------\n");
549 env_flags_print_vartypes();
552 /* Print the available variable access types */
553 printf("Available variable access flags (position %d):\n",
554 ENV_FLAGS_VARACCESS_LOC);
555 puts("\tFlag\tVariable Access Name\n");
556 puts("\t----\t--------------------\n");
557 env_flags_print_varaccess();
560 /* Print the static flags that may exist */
561 puts("Static flags:\n");
562 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
564 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
566 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
569 /* walk through each variable and print the flags if non-default */
570 puts("Active flags:\n");
571 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
573 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
575 hwalk_r(&env_htab, print_active_flags);
581 * Interactively edit an environment variable
583 #if defined(CONFIG_CMD_EDITENV)
584 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
587 char buffer[CONFIG_SYS_CBSIZE];
591 return CMD_RET_USAGE;
593 /* before import into hashtable */
594 if (!(gd->flags & GD_FLG_ENV_READY))
597 /* Set read buffer to initial value or empty sting */
598 init_val = getenv(argv[1]);
600 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
604 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
607 if (buffer[0] == '\0') {
608 const char * const _argv[3] = { "setenv", argv[1], NULL };
610 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
612 const char * const _argv[4] = { "setenv", argv[1], buffer,
615 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
618 #endif /* CONFIG_CMD_EDITENV */
619 #endif /* CONFIG_SPL_BUILD */
622 * Look up variable from environment,
623 * return address of storage for that variable,
624 * or NULL if not found
626 char *getenv(const char *name)
628 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
635 hsearch_r(e, FIND, &ep, &env_htab, 0);
637 return ep ? ep->data : NULL;
640 /* restricted capabilities before import */
641 if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
642 return (char *)(gd->env_buf);
648 * Look up variable from environment for restricted C runtime env.
650 int getenv_f(const char *name, char *buf, unsigned len)
654 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
657 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
658 if (nxt >= CONFIG_ENV_SIZE)
662 val = envmatch((uchar *)name, i);
666 /* found; copy out */
667 for (n = 0; n < len; ++n, ++buf) {
668 *buf = env_get_char(val++);
676 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
686 * Decode the integer value of an environment variable and return it.
688 * @param name Name of environemnt variable
689 * @param base Number base to use (normally 10, or 16 for hex)
690 * @param default_val Default value to return if the variable is not
692 * @return the decoded value, or default_val if not found
694 ulong getenv_ulong(const char *name, int base, ulong default_val)
697 * We can use getenv() here, even before relocation, since the
698 * environment variable value is an integer and thus short.
700 const char *str = getenv(name);
702 return str ? simple_strtoul(str, NULL, base) : default_val;
705 #ifndef CONFIG_SPL_BUILD
706 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
707 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
710 printf("Saving Environment to %s...\n", env_name_spec);
712 return saveenv() ? 1 : 0;
716 saveenv, 1, 0, do_env_save,
717 "save environment variables to persistent storage",
721 #endif /* CONFIG_SPL_BUILD */
725 * Match a name / name=value pair
727 * s1 is either a simple 'name', or a 'name=value' pair.
728 * i2 is the environment index for a 'name2=value2' pair.
729 * If the names match, return the index for the value2, else -1.
731 int envmatch(uchar *s1, int i2)
736 while (*s1 == env_get_char(i2++))
740 if (*s1 == '\0' && env_get_char(i2-1) == '=')
746 #ifndef CONFIG_SPL_BUILD
747 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
748 int argc, char * const argv[])
750 int all = 0, flag = 0;
752 debug("Initial value for argc=%d\n", argc);
753 while (--argc > 0 && **++argv == '-') {
758 case 'a': /* default all */
761 case 'f': /* force */
765 return cmd_usage(cmdtp);
769 debug("Final value for argc=%d\n", argc);
770 if (all && (argc == 0)) {
771 /* Reset the whole environment */
772 set_default_env("## Resetting to default environment\n");
775 if (!all && (argc > 0)) {
776 /* Reset individual variables */
777 set_default_vars(argc, argv);
781 return cmd_usage(cmdtp);
784 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
785 int argc, char * const argv[])
787 int env_flag = H_INTERACTIVE;
790 debug("Initial value for argc=%d\n", argc);
791 while (argc > 1 && **(argv + 1) == '-') {
797 case 'f': /* force */
801 return CMD_RET_USAGE;
805 debug("Final value for argc=%d\n", argc);
810 char *name = *++argv;
812 if (!hdelete_r(name, &env_htab, env_flag))
819 #ifdef CONFIG_CMD_EXPORTENV
821 * env export [-t | -b | -c] [-s size] addr [var ...]
822 * -t: export as text format; if size is given, data will be
823 * padded with '\0' bytes; if not, one terminating '\0'
824 * will be added (which is included in the "filesize"
825 * setting so you can for exmple copy this to flash and
826 * keep the termination).
827 * -b: export as binary format (name=value pairs separated by
828 * '\0', list end marked by double "\0\0")
829 * -c: export as checksum protected environment format as
830 * used for example by "saveenv" command
832 * size of output buffer
833 * addr: memory address where environment gets stored
834 * var... List of variable names that get included into the
835 * export. Without arguments, the whole environment gets
838 * With "-c" and size is NOT given, then the export command will
839 * format the data as currently used for the persistent storage,
840 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
841 * prepend a valid CRC32 checksum and, in case of redundant
842 * environment, a "current" redundancy flag. If size is given, this
843 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
844 * checksum and redundancy flag will be inserted.
846 * With "-b" and "-t", always only the real data (including a
847 * terminating '\0' byte) will be written; here the optional size
848 * argument will be used to make sure not to overflow the user
849 * provided buffer; the command will abort if the size is not
850 * sufficient. Any remaining space will be '\0' padded.
852 * On successful return, the variable "filesize" will be set.
853 * Note that filesize includes the trailing/terminating '\0' byte(s).
855 * Usage scenario: create a text snapshot/backup of the current settings:
857 * => env export -t 100000
858 * => era ${backup_addr} +${filesize}
859 * => cp.b 100000 ${backup_addr} ${filesize}
861 * Re-import this snapshot, deleting all other settings:
863 * => env import -d -t ${backup_addr}
865 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
866 int argc, char * const argv[])
870 char *ptr, *cmd, *res;
880 while (--argc > 0 && **++argv == '-') {
884 case 'b': /* raw binary format */
889 case 'c': /* external checksum format */
895 case 's': /* size given */
897 return cmd_usage(cmdtp);
898 size = simple_strtoul(*++argv, NULL, 16);
900 case 't': /* text format */
906 return CMD_RET_USAGE;
913 return CMD_RET_USAGE;
915 addr = simple_strtoul(argv[0], NULL, 16);
916 ptr = map_sysmem(addr, size);
919 memset(ptr, '\0', size);
924 if (sep) { /* export as text file */
925 len = hexport_r(&env_htab, sep,
926 H_MATCH_KEY | H_MATCH_IDENT,
927 &ptr, size, argc, argv);
929 error("Cannot export environment: errno = %d\n", errno);
932 sprintf(buf, "%zX", (size_t)len);
933 setenv("filesize", buf);
940 if (chk) /* export as checksum protected block */
941 res = (char *)envp->data;
942 else /* export as raw binary data */
945 len = hexport_r(&env_htab, '\0',
946 H_MATCH_KEY | H_MATCH_IDENT,
947 &res, ENV_SIZE, argc, argv);
949 error("Cannot export environment: errno = %d\n", errno);
954 envp->crc = crc32(0, envp->data, ENV_SIZE);
955 #ifdef CONFIG_ENV_ADDR_REDUND
956 envp->flags = ACTIVE_FLAG;
959 setenv_hex("filesize", len + offsetof(env_t, data));
964 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
969 #ifdef CONFIG_CMD_IMPORTENV
971 * env import [-d] [-t [-r] | -b | -c] addr [size]
972 * -d: delete existing environment before importing;
973 * otherwise overwrite / append to existing definitions
974 * -t: assume text format; either "size" must be given or the
975 * text data must be '\0' terminated
976 * -r: handle CRLF like LF, that means exported variables with
977 * a content which ends with \r won't get imported. Used
978 * to import text files created with editors which are using CRLF
979 * for line endings. Only effective in addition to -t.
980 * -b: assume binary format ('\0' separated, "\0\0" terminated)
981 * -c: assume checksum protected environment format
982 * addr: memory address to read from
983 * size: length of input data; if missing, proper '\0'
984 * termination is mandatory
986 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
987 int argc, char * const argv[])
1000 while (--argc > 0 && **++argv == '-') {
1004 case 'b': /* raw binary format */
1009 case 'c': /* external checksum format */
1015 case 't': /* text format */
1020 case 'r': /* handle CRLF like LF */
1027 return CMD_RET_USAGE;
1033 return CMD_RET_USAGE;
1036 printf("## Warning: defaulting to text format\n");
1038 if (sep != '\n' && crlf_is_lf )
1041 addr = simple_strtoul(argv[0], NULL, 16);
1042 ptr = map_sysmem(addr, 0);
1045 size = simple_strtoul(argv[1], NULL, 16);
1046 } else if (argc == 1 && chk) {
1047 puts("## Error: external checksum format must pass size\n");
1048 return CMD_RET_FAILURE;
1054 while (size < MAX_ENV_SIZE) {
1055 if ((*s == sep) && (*(s+1) == '\0'))
1060 if (size == MAX_ENV_SIZE) {
1061 printf("## Warning: Input data exceeds %d bytes"
1062 " - truncated\n", MAX_ENV_SIZE);
1065 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1070 env_t *ep = (env_t *)ptr;
1072 size -= offsetof(env_t, data);
1073 memcpy(&crc, &ep->crc, sizeof(crc));
1075 if (crc32(0, ep->data, size) != crc) {
1076 puts("## Error: bad CRC, import failed\n");
1079 ptr = (char *)ep->data;
1082 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1083 crlf_is_lf, 0, NULL) == 0) {
1084 error("Environment import failed: errno = %d\n", errno);
1087 gd->flags |= GD_FLG_ENV_READY;
1092 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1098 #if defined(CONFIG_CMD_ENV_EXISTS)
1099 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1100 char * const argv[])
1105 return CMD_RET_USAGE;
1109 hsearch_r(e, FIND, &ep, &env_htab, 0);
1111 return (ep == NULL) ? 1 : 0;
1116 * New command line interface: "env" command with subcommands
1118 static cmd_tbl_t cmd_env_sub[] = {
1119 #if defined(CONFIG_CMD_ASKENV)
1120 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1122 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1123 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1124 #if defined(CONFIG_CMD_EDITENV)
1125 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1127 #if defined(CONFIG_CMD_ENV_CALLBACK)
1128 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1130 #if defined(CONFIG_CMD_ENV_FLAGS)
1131 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1133 #if defined(CONFIG_CMD_EXPORTENV)
1134 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1136 #if defined(CONFIG_CMD_GREPENV)
1137 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1139 #if defined(CONFIG_CMD_IMPORTENV)
1140 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1142 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1143 #if defined(CONFIG_CMD_RUN)
1144 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1146 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1147 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1149 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1150 #if defined(CONFIG_CMD_ENV_EXISTS)
1151 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1155 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1156 void env_reloc(void)
1158 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1162 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1167 return CMD_RET_USAGE;
1169 /* drop initial "env" arg */
1173 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1176 return cp->cmd(cmdtp, flag, argc, argv);
1178 return CMD_RET_USAGE;
1181 #ifdef CONFIG_SYS_LONGHELP
1182 static char env_help_text[] =
1183 #if defined(CONFIG_CMD_ASKENV)
1184 "ask name [message] [size] - ask for environment variable\nenv "
1186 #if defined(CONFIG_CMD_ENV_CALLBACK)
1187 "callbacks - print callbacks and their associated variables\nenv "
1189 "default [-f] -a - [forcibly] reset default environment\n"
1190 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1191 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1192 #if defined(CONFIG_CMD_EDITENV)
1193 "env edit name - edit environment variable\n"
1195 #if defined(CONFIG_CMD_ENV_EXISTS)
1196 "env exists name - tests for existence of variable\n"
1198 #if defined(CONFIG_CMD_EXPORTENV)
1199 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1201 #if defined(CONFIG_CMD_ENV_FLAGS)
1202 "env flags - print variables that have non-default flags\n"
1204 #if defined(CONFIG_CMD_GREPENV)
1206 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1208 "env grep [-n | -v | -b] string [...] - search environment\n"
1211 #if defined(CONFIG_CMD_IMPORTENV)
1212 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1214 "env print [-a | name ...] - print environment\n"
1215 #if defined(CONFIG_CMD_RUN)
1216 "env run var [...] - run commands in an environment variable\n"
1218 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1219 "env save - save environment\n"
1221 "env set [-f] name [arg ...]\n";
1225 env, CONFIG_SYS_MAXARGS, 1, do_env,
1226 "environment handling commands", env_help_text
1230 * Old command line interface, kept for compatibility
1233 #if defined(CONFIG_CMD_EDITENV)
1234 U_BOOT_CMD_COMPLETE(
1235 editenv, 2, 0, do_env_edit,
1236 "edit environment variable",
1238 " - edit environment variable 'name'",
1243 U_BOOT_CMD_COMPLETE(
1244 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1245 "print environment variables",
1246 "[-a]\n - print [all] values of all environment variables\n"
1247 "printenv name ...\n"
1248 " - print value of environment variable 'name'",
1252 #ifdef CONFIG_CMD_GREPENV
1253 U_BOOT_CMD_COMPLETE(
1254 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1255 "search environment variables",
1257 "[-e] [-n | -v | -b] string ...\n"
1259 "[-n | -v | -b] string ...\n"
1261 " - list environment name=value pairs matching 'string'\n"
1263 " \"-e\": enable regular expressions;\n"
1265 " \"-n\": search variable names; \"-v\": search values;\n"
1266 " \"-b\": search both names and values (default)",
1271 U_BOOT_CMD_COMPLETE(
1272 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1273 "set environment variables",
1274 "[-f] name value ...\n"
1275 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1276 "setenv [-f] name\n"
1277 " - [forcibly] delete environment variable 'name'",
1281 #if defined(CONFIG_CMD_ASKENV)
1284 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1285 "get environment variables from stdin",
1286 "name [message] [size]\n"
1287 " - get environment variable 'name' from stdin (max 'size' chars)"
1291 #if defined(CONFIG_CMD_RUN)
1292 U_BOOT_CMD_COMPLETE(
1293 run, CONFIG_SYS_MAXARGS, 1, do_run,
1294 "run commands in an environment variable",
1296 " - run the commands in the environment variable(s) 'var'",
1300 #endif /* CONFIG_SPL_BUILD */