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|MMC|FAT|EXT4|\
58 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|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);
238 if (strchr(name, '=')) {
239 printf("## Error: illegal character '='"
240 "in variable name \"%s\"\n", name);
247 if (argc < 3 || argv[2] == NULL) {
248 int rc = hdelete_r(name, &env_htab, env_flag);
253 * Insert / replace new value
255 for (i = 2, len = 0; i < argc; ++i)
256 len += strlen(argv[i]) + 1;
260 printf("## Can't malloc %d bytes\n", len);
263 for (i = 2, s = value; i < argc; ++i) {
266 while ((*s++ = *v++) != '\0')
275 hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
278 printf("## Error inserting \"%s\" variable, errno=%d\n",
286 int env_set(const char *varname, const char *varvalue)
288 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
290 /* before import into hashtable */
291 if (!(gd->flags & GD_FLG_ENV_READY))
294 if (varvalue == NULL || varvalue[0] == '\0')
295 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
297 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
301 * Set an environment variable to an integer value
303 * @param varname Environment variable to set
304 * @param value Value to set it to
305 * @return 0 if ok, 1 on error
307 int env_set_ulong(const char *varname, ulong value)
309 /* TODO: this should be unsigned */
310 char *str = simple_itoa(value);
312 return env_set(varname, str);
316 * Set an environment variable to an value in hex
318 * @param varname Environment variable to set
319 * @param value Value to set it to
320 * @return 0 if ok, 1 on error
322 int env_set_hex(const char *varname, ulong value)
326 sprintf(str, "%lx", value);
327 return env_set(varname, str);
330 ulong env_get_hex(const char *varname, ulong default_val)
336 s = env_get(varname);
338 value = simple_strtoul(s, &endp, 16);
345 #ifndef CONFIG_SPL_BUILD
346 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
349 return CMD_RET_USAGE;
351 return _do_env_set(flag, argc, argv, H_INTERACTIVE);
355 * Prompt for environment variable
357 #if defined(CONFIG_CMD_ASKENV)
358 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
360 char message[CONFIG_SYS_CBSIZE];
361 int i, len, pos, size;
365 local_args[0] = argv[0];
366 local_args[1] = argv[1];
367 local_args[2] = NULL;
368 local_args[3] = NULL;
373 * env_ask envname [message1 ...] [size]
376 return CMD_RET_USAGE;
379 * We test the last argument if it can be converted
380 * into a decimal number. If yes, we assume it's
381 * the size. Otherwise we echo it as part of the
384 i = simple_strtoul(argv[argc - 1], &endptr, 10);
385 if (*endptr != '\0') { /* no size */
386 size = CONFIG_SYS_CBSIZE - 1;
387 } else { /* size given */
393 sprintf(message, "Please enter '%s': ", argv[1]);
395 /* env_ask envname message1 ... messagen [size] */
396 for (i = 2, pos = 0; i < argc; i++) {
398 message[pos++] = ' ';
400 strcpy(message + pos, argv[i]);
401 pos += strlen(argv[i]);
403 message[pos++] = ' ';
407 if (size >= CONFIG_SYS_CBSIZE)
408 size = CONFIG_SYS_CBSIZE - 1;
413 /* prompt for input */
414 len = cli_readline(message);
417 console_buffer[size] = '\0';
420 if (console_buffer[0] != '\0') {
421 local_args[2] = console_buffer;
425 /* Continue calling setenv code */
426 return _do_env_set(flag, len, local_args, H_INTERACTIVE);
430 #if defined(CONFIG_CMD_ENV_CALLBACK)
431 static int print_static_binding(const char *var_name, const char *callback_name,
434 printf("\t%-20s %-20s\n", var_name, callback_name);
439 static int print_active_callback(ENTRY *entry)
441 struct env_clbk_tbl *clbkp;
445 if (entry->callback == NULL)
448 /* look up the callback in the linker-list */
449 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
450 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
453 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
454 if (entry->callback == clbkp->callback + gd->reloc_off)
456 if (entry->callback == clbkp->callback)
461 if (i == num_callbacks)
462 /* this should probably never happen, but just in case... */
463 printf("\t%-20s %p\n", entry->key, entry->callback);
465 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
471 * Print the callbacks available and what they are bound to
473 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
475 struct env_clbk_tbl *clbkp;
479 /* Print the available callbacks */
480 puts("Available callbacks:\n");
481 puts("\tCallback Name\n");
482 puts("\t-------------\n");
483 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
484 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
487 printf("\t%s\n", clbkp->name);
490 /* Print the static bindings that may exist */
491 puts("Static callback bindings:\n");
492 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
493 printf("\t%-20s %-20s\n", "-------------", "-------------");
494 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
497 /* walk through each variable and print the callback if it has one */
498 puts("Active callback bindings:\n");
499 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
500 printf("\t%-20s %-20s\n", "-------------", "-------------");
501 hwalk_r(&env_htab, print_active_callback);
506 #if defined(CONFIG_CMD_ENV_FLAGS)
507 static int print_static_flags(const char *var_name, const char *flags,
510 enum env_flags_vartype type = env_flags_parse_vartype(flags);
511 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
513 printf("\t%-20s %-20s %-20s\n", var_name,
514 env_flags_get_vartype_name(type),
515 env_flags_get_varaccess_name(access));
520 static int print_active_flags(ENTRY *entry)
522 enum env_flags_vartype type;
523 enum env_flags_varaccess access;
525 if (entry->flags == 0)
528 type = (enum env_flags_vartype)
529 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
530 access = env_flags_parse_varaccess_from_binflags(entry->flags);
531 printf("\t%-20s %-20s %-20s\n", entry->key,
532 env_flags_get_vartype_name(type),
533 env_flags_get_varaccess_name(access));
539 * Print the flags available and what variables have flags
541 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
543 /* Print the available variable types */
544 printf("Available variable type flags (position %d):\n",
545 ENV_FLAGS_VARTYPE_LOC);
546 puts("\tFlag\tVariable Type Name\n");
547 puts("\t----\t------------------\n");
548 env_flags_print_vartypes();
551 /* Print the available variable access types */
552 printf("Available variable access flags (position %d):\n",
553 ENV_FLAGS_VARACCESS_LOC);
554 puts("\tFlag\tVariable Access Name\n");
555 puts("\t----\t--------------------\n");
556 env_flags_print_varaccess();
559 /* Print the static flags that may exist */
560 puts("Static flags:\n");
561 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
563 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
565 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
568 /* walk through each variable and print the flags if non-default */
569 puts("Active flags:\n");
570 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
572 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
574 hwalk_r(&env_htab, print_active_flags);
580 * Interactively edit an environment variable
582 #if defined(CONFIG_CMD_EDITENV)
583 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
586 char buffer[CONFIG_SYS_CBSIZE];
590 return CMD_RET_USAGE;
592 /* before import into hashtable */
593 if (!(gd->flags & GD_FLG_ENV_READY))
596 /* Set read buffer to initial value or empty sting */
597 init_val = env_get(argv[1]);
599 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
603 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
606 if (buffer[0] == '\0') {
607 const char * const _argv[3] = { "setenv", argv[1], NULL };
609 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
611 const char * const _argv[4] = { "setenv", argv[1], buffer,
614 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
617 #endif /* CONFIG_CMD_EDITENV */
618 #endif /* CONFIG_SPL_BUILD */
621 * Look up variable from environment,
622 * return address of storage for that variable,
623 * or NULL if not found
625 char *env_get(const char *name)
627 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
634 hsearch_r(e, FIND, &ep, &env_htab, 0);
636 return ep ? ep->data : NULL;
639 /* restricted capabilities before import */
640 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
641 return (char *)(gd->env_buf);
647 * Look up variable from environment for restricted C runtime env.
649 int env_get_f(const char *name, char *buf, unsigned len)
653 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
656 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) {
657 if (nxt >= CONFIG_ENV_SIZE)
661 val = envmatch((uchar *)name, i);
665 /* found; copy out */
666 for (n = 0; n < len; ++n, ++buf) {
667 *buf = env_get_char(val++);
675 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
685 * Decode the integer value of an environment variable and return it.
687 * @param name Name of environemnt variable
688 * @param base Number base to use (normally 10, or 16 for hex)
689 * @param default_val Default value to return if the variable is not
691 * @return the decoded value, or default_val if not found
693 ulong env_get_ulong(const char *name, int base, ulong default_val)
696 * We can use env_get() here, even before relocation, since the
697 * environment variable value is an integer and thus short.
699 const char *str = env_get(name);
701 return str ? simple_strtoul(str, NULL, base) : default_val;
704 #ifndef CONFIG_SPL_BUILD
705 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
706 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
709 struct env_driver *env = env_driver_lookup_default();
711 printf("Saving Environment to %s...\n", env->name);
713 return env_save() ? 1 : 0;
717 saveenv, 1, 0, do_env_save,
718 "save environment variables to persistent storage",
722 #endif /* CONFIG_SPL_BUILD */
726 * Match a name / name=value pair
728 * s1 is either a simple 'name', or a 'name=value' pair.
729 * i2 is the environment index for a 'name2=value2' pair.
730 * If the names match, return the index for the value2, else -1.
732 int envmatch(uchar *s1, int i2)
737 while (*s1 == env_get_char(i2++))
741 if (*s1 == '\0' && env_get_char(i2-1) == '=')
747 #ifndef CONFIG_SPL_BUILD
748 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
749 int argc, char * const argv[])
751 int all = 0, flag = 0;
753 debug("Initial value for argc=%d\n", argc);
754 while (--argc > 0 && **++argv == '-') {
759 case 'a': /* default all */
762 case 'f': /* force */
766 return cmd_usage(cmdtp);
770 debug("Final value for argc=%d\n", argc);
771 if (all && (argc == 0)) {
772 /* Reset the whole environment */
773 set_default_env("## Resetting to default environment\n");
776 if (!all && (argc > 0)) {
777 /* Reset individual variables */
778 set_default_vars(argc, argv);
782 return cmd_usage(cmdtp);
785 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
786 int argc, char * const argv[])
788 int env_flag = H_INTERACTIVE;
791 debug("Initial value for argc=%d\n", argc);
792 while (argc > 1 && **(argv + 1) == '-') {
798 case 'f': /* force */
802 return CMD_RET_USAGE;
806 debug("Final value for argc=%d\n", argc);
811 char *name = *++argv;
813 if (!hdelete_r(name, &env_htab, env_flag))
820 #ifdef CONFIG_CMD_EXPORTENV
822 * env export [-t | -b | -c] [-s size] addr [var ...]
823 * -t: export as text format; if size is given, data will be
824 * padded with '\0' bytes; if not, one terminating '\0'
825 * will be added (which is included in the "filesize"
826 * setting so you can for exmple copy this to flash and
827 * keep the termination).
828 * -b: export as binary format (name=value pairs separated by
829 * '\0', list end marked by double "\0\0")
830 * -c: export as checksum protected environment format as
831 * used for example by "saveenv" command
833 * size of output buffer
834 * addr: memory address where environment gets stored
835 * var... List of variable names that get included into the
836 * export. Without arguments, the whole environment gets
839 * With "-c" and size is NOT given, then the export command will
840 * format the data as currently used for the persistent storage,
841 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
842 * prepend a valid CRC32 checksum and, in case of redundant
843 * environment, a "current" redundancy flag. If size is given, this
844 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
845 * checksum and redundancy flag will be inserted.
847 * With "-b" and "-t", always only the real data (including a
848 * terminating '\0' byte) will be written; here the optional size
849 * argument will be used to make sure not to overflow the user
850 * provided buffer; the command will abort if the size is not
851 * sufficient. Any remaining space will be '\0' padded.
853 * On successful return, the variable "filesize" will be set.
854 * Note that filesize includes the trailing/terminating '\0' byte(s).
856 * Usage scenario: create a text snapshot/backup of the current settings:
858 * => env export -t 100000
859 * => era ${backup_addr} +${filesize}
860 * => cp.b 100000 ${backup_addr} ${filesize}
862 * Re-import this snapshot, deleting all other settings:
864 * => env import -d -t ${backup_addr}
866 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
867 int argc, char * const argv[])
871 char *ptr, *cmd, *res;
881 while (--argc > 0 && **++argv == '-') {
885 case 'b': /* raw binary format */
890 case 'c': /* external checksum format */
896 case 's': /* size given */
898 return cmd_usage(cmdtp);
899 size = simple_strtoul(*++argv, NULL, 16);
901 case 't': /* text format */
907 return CMD_RET_USAGE;
914 return CMD_RET_USAGE;
916 addr = simple_strtoul(argv[0], NULL, 16);
917 ptr = map_sysmem(addr, size);
920 memset(ptr, '\0', size);
925 if (sep) { /* export as text file */
926 len = hexport_r(&env_htab, sep,
927 H_MATCH_KEY | H_MATCH_IDENT,
928 &ptr, size, argc, argv);
930 pr_err("Cannot export environment: errno = %d\n", errno);
933 sprintf(buf, "%zX", (size_t)len);
934 env_set("filesize", buf);
941 if (chk) /* export as checksum protected block */
942 res = (char *)envp->data;
943 else /* export as raw binary data */
946 len = hexport_r(&env_htab, '\0',
947 H_MATCH_KEY | H_MATCH_IDENT,
948 &res, ENV_SIZE, argc, argv);
950 pr_err("Cannot export environment: errno = %d\n", errno);
955 envp->crc = crc32(0, envp->data, ENV_SIZE);
956 #ifdef CONFIG_ENV_ADDR_REDUND
957 envp->flags = ACTIVE_FLAG;
960 env_set_hex("filesize", len + offsetof(env_t, data));
965 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
970 #ifdef CONFIG_CMD_IMPORTENV
972 * env import [-d] [-t [-r] | -b | -c] addr [size]
973 * -d: delete existing environment before importing;
974 * otherwise overwrite / append to existing definitions
975 * -t: assume text format; either "size" must be given or the
976 * text data must be '\0' terminated
977 * -r: handle CRLF like LF, that means exported variables with
978 * a content which ends with \r won't get imported. Used
979 * to import text files created with editors which are using CRLF
980 * for line endings. Only effective in addition to -t.
981 * -b: assume binary format ('\0' separated, "\0\0" terminated)
982 * -c: assume checksum protected environment format
983 * addr: memory address to read from
984 * size: length of input data; if missing, proper '\0'
985 * termination is mandatory
987 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
988 int argc, char * const argv[])
1001 while (--argc > 0 && **++argv == '-') {
1005 case 'b': /* raw binary format */
1010 case 'c': /* external checksum format */
1016 case 't': /* text format */
1021 case 'r': /* handle CRLF like LF */
1028 return CMD_RET_USAGE;
1034 return CMD_RET_USAGE;
1037 printf("## Warning: defaulting to text format\n");
1039 if (sep != '\n' && crlf_is_lf )
1042 addr = simple_strtoul(argv[0], NULL, 16);
1043 ptr = map_sysmem(addr, 0);
1046 size = simple_strtoul(argv[1], NULL, 16);
1047 } else if (argc == 1 && chk) {
1048 puts("## Error: external checksum format must pass size\n");
1049 return CMD_RET_FAILURE;
1055 while (size < MAX_ENV_SIZE) {
1056 if ((*s == sep) && (*(s+1) == '\0'))
1061 if (size == MAX_ENV_SIZE) {
1062 printf("## Warning: Input data exceeds %d bytes"
1063 " - truncated\n", MAX_ENV_SIZE);
1066 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1071 env_t *ep = (env_t *)ptr;
1073 size -= offsetof(env_t, data);
1074 memcpy(&crc, &ep->crc, sizeof(crc));
1076 if (crc32(0, ep->data, size) != crc) {
1077 puts("## Error: bad CRC, import failed\n");
1080 ptr = (char *)ep->data;
1083 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1084 crlf_is_lf, 0, NULL) == 0) {
1085 pr_err("Environment import failed: errno = %d\n", errno);
1088 gd->flags |= GD_FLG_ENV_READY;
1093 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1099 #if defined(CONFIG_CMD_ENV_EXISTS)
1100 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1101 char * const argv[])
1106 return CMD_RET_USAGE;
1110 hsearch_r(e, FIND, &ep, &env_htab, 0);
1112 return (ep == NULL) ? 1 : 0;
1117 * New command line interface: "env" command with subcommands
1119 static cmd_tbl_t cmd_env_sub[] = {
1120 #if defined(CONFIG_CMD_ASKENV)
1121 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1123 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1124 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1125 #if defined(CONFIG_CMD_EDITENV)
1126 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1128 #if defined(CONFIG_CMD_ENV_CALLBACK)
1129 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1131 #if defined(CONFIG_CMD_ENV_FLAGS)
1132 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1134 #if defined(CONFIG_CMD_EXPORTENV)
1135 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1137 #if defined(CONFIG_CMD_GREPENV)
1138 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1140 #if defined(CONFIG_CMD_IMPORTENV)
1141 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1143 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1144 #if defined(CONFIG_CMD_RUN)
1145 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1147 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1148 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1150 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1151 #if defined(CONFIG_CMD_ENV_EXISTS)
1152 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1156 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1157 void env_reloc(void)
1159 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1163 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1168 return CMD_RET_USAGE;
1170 /* drop initial "env" arg */
1174 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1177 return cp->cmd(cmdtp, flag, argc, argv);
1179 return CMD_RET_USAGE;
1182 #ifdef CONFIG_SYS_LONGHELP
1183 static char env_help_text[] =
1184 #if defined(CONFIG_CMD_ASKENV)
1185 "ask name [message] [size] - ask for environment variable\nenv "
1187 #if defined(CONFIG_CMD_ENV_CALLBACK)
1188 "callbacks - print callbacks and their associated variables\nenv "
1190 "default [-f] -a - [forcibly] reset default environment\n"
1191 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1192 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1193 #if defined(CONFIG_CMD_EDITENV)
1194 "env edit name - edit environment variable\n"
1196 #if defined(CONFIG_CMD_ENV_EXISTS)
1197 "env exists name - tests for existence of variable\n"
1199 #if defined(CONFIG_CMD_EXPORTENV)
1200 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1202 #if defined(CONFIG_CMD_ENV_FLAGS)
1203 "env flags - print variables that have non-default flags\n"
1205 #if defined(CONFIG_CMD_GREPENV)
1207 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1209 "env grep [-n | -v | -b] string [...] - search environment\n"
1212 #if defined(CONFIG_CMD_IMPORTENV)
1213 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1215 "env print [-a | name ...] - print environment\n"
1216 #if defined(CONFIG_CMD_RUN)
1217 "env run var [...] - run commands in an environment variable\n"
1219 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1220 "env save - save environment\n"
1222 "env set [-f] name [arg ...]\n";
1226 env, CONFIG_SYS_MAXARGS, 1, do_env,
1227 "environment handling commands", env_help_text
1231 * Old command line interface, kept for compatibility
1234 #if defined(CONFIG_CMD_EDITENV)
1235 U_BOOT_CMD_COMPLETE(
1236 editenv, 2, 0, do_env_edit,
1237 "edit environment variable",
1239 " - edit environment variable 'name'",
1244 U_BOOT_CMD_COMPLETE(
1245 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1246 "print environment variables",
1247 "[-a]\n - print [all] values of all environment variables\n"
1248 "printenv name ...\n"
1249 " - print value of environment variable 'name'",
1253 #ifdef CONFIG_CMD_GREPENV
1254 U_BOOT_CMD_COMPLETE(
1255 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1256 "search environment variables",
1258 "[-e] [-n | -v | -b] string ...\n"
1260 "[-n | -v | -b] string ...\n"
1262 " - list environment name=value pairs matching 'string'\n"
1264 " \"-e\": enable regular expressions;\n"
1266 " \"-n\": search variable names; \"-v\": search values;\n"
1267 " \"-b\": search both names and values (default)",
1272 U_BOOT_CMD_COMPLETE(
1273 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1274 "set environment variables",
1275 "[-f] name value ...\n"
1276 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1277 "setenv [-f] name\n"
1278 " - [forcibly] delete environment variable 'name'",
1282 #if defined(CONFIG_CMD_ASKENV)
1285 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1286 "get environment variables from stdin",
1287 "name [message] [size]\n"
1288 " - get environment variable 'name' from stdin (max 'size' chars)"
1292 #if defined(CONFIG_CMD_RUN)
1293 U_BOOT_CMD_COMPLETE(
1294 run, CONFIG_SYS_MAXARGS, 1, do_run,
1295 "run commands in an environment variable",
1297 " - run the commands in the environment variable(s) 'var'",
1301 #endif /* CONFIG_SPL_BUILD */