1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2013
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Andreas Heppel <aheppel@sysgo.de>
9 * Copyright 2011 Freescale Semiconductor, Inc.
13 * Support for persistent environment data
15 * The "environment" is stored on external storage as a list of '\0'
16 * terminated "name=value" strings. The end of the list is marked by
17 * a double '\0'. The environment is preceded by a 32 bit CRC over
18 * the data part and, in case of redundant environment, a byte of
21 * This linearized representation will also be used before
22 * relocation, i. e. as long as we don't have a full C runtime
23 * environment. After that, we use a hash table.
30 #include <environment.h>
36 #include <linux/stddef.h>
37 #include <asm/byteorder.h>
40 DECLARE_GLOBAL_DATA_PTR;
42 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
43 !defined(CONFIG_ENV_IS_IN_FLASH) && \
44 !defined(CONFIG_ENV_IS_IN_MMC) && \
45 !defined(CONFIG_ENV_IS_IN_FAT) && \
46 !defined(CONFIG_ENV_IS_IN_EXT4) && \
47 !defined(CONFIG_ENV_IS_IN_NAND) && \
48 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
49 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
50 !defined(CONFIG_ENV_IS_IN_SATA) && \
51 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
52 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
53 !defined(CONFIG_ENV_IS_IN_UBI) && \
54 !defined(CONFIG_ENV_IS_NOWHERE)
55 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
56 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
60 * Maximum expected input data size for import command
62 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
65 * This variable is incremented on each do_env_set(), so it can
66 * be used via get_env_id() as an indication, if the environment
67 * has changed or not. So it is possible to reread an environment
68 * variable only if the environment was changed ... done so for
69 * example in NetInitLoop()
71 static int env_id = 1;
78 #ifndef CONFIG_SPL_BUILD
80 * Command interface: print one or all environment variables
82 * Returns 0 in case of error, or length of printed string
84 static int env_print(char *name, int flag)
89 if (name) { /* print a single name */
94 hsearch_r(e, FIND, &ep, &env_htab, flag);
97 len = printf("%s=%s\n", ep->key, ep->data);
101 /* print whole list */
102 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
110 /* should never happen */
111 printf("## Error: cannot export environment\n");
115 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
120 int env_flag = H_HIDE_DOT;
122 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
125 env_flag &= ~H_HIDE_DOT;
129 /* print all env vars */
130 rcode = env_print(NULL, env_flag);
133 printf("\nEnvironment size: %d/%ld bytes\n",
134 rcode, (ulong)ENV_SIZE);
138 /* print selected env vars */
139 env_flag &= ~H_HIDE_DOT;
140 for (i = 1; i < argc; ++i) {
141 int rc = env_print(argv[i], env_flag);
143 printf("## Error: \"%s\" not defined\n", argv[i]);
151 #ifdef CONFIG_CMD_GREPENV
152 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
153 int argc, char * const argv[])
156 int len, grep_how, grep_what;
159 return CMD_RET_USAGE;
161 grep_how = H_MATCH_SUBSTR; /* default: substring search */
162 grep_what = H_MATCH_BOTH; /* default: grep names and values */
164 while (--argc > 0 && **++argv == '-') {
169 case 'e': /* use regex matching */
170 grep_how = H_MATCH_REGEX;
173 case 'n': /* grep for name */
174 grep_what = H_MATCH_KEY;
176 case 'v': /* grep for value */
177 grep_what = H_MATCH_DATA;
179 case 'b': /* grep for both */
180 grep_what = H_MATCH_BOTH;
185 return CMD_RET_USAGE;
191 len = hexport_r(&env_htab, '\n',
192 flag | grep_what | grep_how,
193 &res, 0, argc, argv);
206 #endif /* CONFIG_SPL_BUILD */
209 * Set a new environment variable,
210 * or replace or delete an existing one.
212 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
215 char *name, *value, *s;
218 debug("Initial value for argc=%d\n", argc);
219 while (argc > 1 && **(argv + 1) == '-') {
225 case 'f': /* force */
229 return CMD_RET_USAGE;
233 debug("Final value for argc=%d\n", argc);
236 if (strchr(name, '=')) {
237 printf("## Error: illegal character '='"
238 "in variable name \"%s\"\n", name);
245 if (argc < 3 || argv[2] == NULL) {
246 int rc = hdelete_r(name, &env_htab, env_flag);
251 * Insert / replace new value
253 for (i = 2, len = 0; i < argc; ++i)
254 len += strlen(argv[i]) + 1;
258 printf("## Can't malloc %d bytes\n", len);
261 for (i = 2, s = value; i < argc; ++i) {
264 while ((*s++ = *v++) != '\0')
273 hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
276 printf("## Error inserting \"%s\" variable, errno=%d\n",
284 int env_set(const char *varname, const char *varvalue)
286 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
288 /* before import into hashtable */
289 if (!(gd->flags & GD_FLG_ENV_READY))
292 if (varvalue == NULL || varvalue[0] == '\0')
293 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
295 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
299 * Set an environment variable to an integer value
301 * @param varname Environment variable to set
302 * @param value Value to set it to
303 * @return 0 if ok, 1 on error
305 int env_set_ulong(const char *varname, ulong value)
307 /* TODO: this should be unsigned */
308 char *str = simple_itoa(value);
310 return env_set(varname, str);
314 * Set an environment variable to an value in hex
316 * @param varname Environment variable to set
317 * @param value Value to set it to
318 * @return 0 if ok, 1 on error
320 int env_set_hex(const char *varname, ulong value)
324 sprintf(str, "%lx", value);
325 return env_set(varname, str);
328 ulong env_get_hex(const char *varname, ulong default_val)
334 s = env_get(varname);
336 value = simple_strtoul(s, &endp, 16);
343 void eth_parse_enetaddr(const char *addr, uint8_t *enetaddr)
348 for (i = 0; i < 6; ++i) {
349 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
351 addr = (*end) ? end + 1 : end;
355 int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr)
357 eth_parse_enetaddr(env_get(name), enetaddr);
358 return is_valid_ethaddr(enetaddr);
361 int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr)
363 char buf[ARP_HLEN_ASCII + 1];
365 if (eth_env_get_enetaddr(name, (uint8_t *)buf))
368 sprintf(buf, "%pM", enetaddr);
370 return env_set(name, buf);
373 #ifndef CONFIG_SPL_BUILD
374 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
377 return CMD_RET_USAGE;
379 return _do_env_set(flag, argc, argv, H_INTERACTIVE);
383 * Prompt for environment variable
385 #if defined(CONFIG_CMD_ASKENV)
386 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
388 char message[CONFIG_SYS_CBSIZE];
389 int i, len, pos, size;
393 local_args[0] = argv[0];
394 local_args[1] = argv[1];
395 local_args[2] = NULL;
396 local_args[3] = NULL;
401 * env_ask envname [message1 ...] [size]
404 return CMD_RET_USAGE;
407 * We test the last argument if it can be converted
408 * into a decimal number. If yes, we assume it's
409 * the size. Otherwise we echo it as part of the
412 i = simple_strtoul(argv[argc - 1], &endptr, 10);
413 if (*endptr != '\0') { /* no size */
414 size = CONFIG_SYS_CBSIZE - 1;
415 } else { /* size given */
421 sprintf(message, "Please enter '%s': ", argv[1]);
423 /* env_ask envname message1 ... messagen [size] */
424 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
426 message[pos++] = ' ';
428 strncpy(message + pos, argv[i], sizeof(message) - pos);
429 pos += strlen(argv[i]);
431 if (pos < sizeof(message) - 1) {
432 message[pos++] = ' ';
435 message[CONFIG_SYS_CBSIZE - 1] = '\0';
438 if (size >= CONFIG_SYS_CBSIZE)
439 size = CONFIG_SYS_CBSIZE - 1;
444 /* prompt for input */
445 len = cli_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, H_INTERACTIVE);
461 #if defined(CONFIG_CMD_ENV_CALLBACK)
462 static int print_static_binding(const char *var_name, const char *callback_name,
465 printf("\t%-20s %-20s\n", var_name, callback_name);
470 static int print_active_callback(ENTRY *entry)
472 struct env_clbk_tbl *clbkp;
476 if (entry->callback == NULL)
479 /* look up the callback in the linker-list */
480 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
481 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
484 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
485 if (entry->callback == clbkp->callback + gd->reloc_off)
487 if (entry->callback == clbkp->callback)
492 if (i == num_callbacks)
493 /* this should probably never happen, but just in case... */
494 printf("\t%-20s %p\n", entry->key, entry->callback);
496 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
502 * Print the callbacks available and what they are bound to
504 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
506 struct env_clbk_tbl *clbkp;
510 /* Print the available callbacks */
511 puts("Available callbacks:\n");
512 puts("\tCallback Name\n");
513 puts("\t-------------\n");
514 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
515 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
518 printf("\t%s\n", clbkp->name);
521 /* Print the static bindings that may exist */
522 puts("Static callback bindings:\n");
523 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
524 printf("\t%-20s %-20s\n", "-------------", "-------------");
525 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
528 /* walk through each variable and print the callback if it has one */
529 puts("Active callback bindings:\n");
530 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
531 printf("\t%-20s %-20s\n", "-------------", "-------------");
532 hwalk_r(&env_htab, print_active_callback);
537 #if defined(CONFIG_CMD_ENV_FLAGS)
538 static int print_static_flags(const char *var_name, const char *flags,
541 enum env_flags_vartype type = env_flags_parse_vartype(flags);
542 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
544 printf("\t%-20s %-20s %-20s\n", var_name,
545 env_flags_get_vartype_name(type),
546 env_flags_get_varaccess_name(access));
551 static int print_active_flags(ENTRY *entry)
553 enum env_flags_vartype type;
554 enum env_flags_varaccess access;
556 if (entry->flags == 0)
559 type = (enum env_flags_vartype)
560 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
561 access = env_flags_parse_varaccess_from_binflags(entry->flags);
562 printf("\t%-20s %-20s %-20s\n", entry->key,
563 env_flags_get_vartype_name(type),
564 env_flags_get_varaccess_name(access));
570 * Print the flags available and what variables have flags
572 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
574 /* Print the available variable types */
575 printf("Available variable type flags (position %d):\n",
576 ENV_FLAGS_VARTYPE_LOC);
577 puts("\tFlag\tVariable Type Name\n");
578 puts("\t----\t------------------\n");
579 env_flags_print_vartypes();
582 /* Print the available variable access types */
583 printf("Available variable access flags (position %d):\n",
584 ENV_FLAGS_VARACCESS_LOC);
585 puts("\tFlag\tVariable Access Name\n");
586 puts("\t----\t--------------------\n");
587 env_flags_print_varaccess();
590 /* Print the static flags that may exist */
591 puts("Static flags:\n");
592 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
594 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
596 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
599 /* walk through each variable and print the flags if non-default */
600 puts("Active flags:\n");
601 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
603 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
605 hwalk_r(&env_htab, print_active_flags);
611 * Interactively edit an environment variable
613 #if defined(CONFIG_CMD_EDITENV)
614 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
617 char buffer[CONFIG_SYS_CBSIZE];
621 return CMD_RET_USAGE;
623 /* before import into hashtable */
624 if (!(gd->flags & GD_FLG_ENV_READY))
627 /* Set read buffer to initial value or empty sting */
628 init_val = env_get(argv[1]);
630 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
634 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
637 if (buffer[0] == '\0') {
638 const char * const _argv[3] = { "setenv", argv[1], NULL };
640 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
642 const char * const _argv[4] = { "setenv", argv[1], buffer,
645 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
648 #endif /* CONFIG_CMD_EDITENV */
649 #endif /* CONFIG_SPL_BUILD */
652 * Look up variable from environment,
653 * return address of storage for that variable,
654 * or NULL if not found
656 char *env_get(const char *name)
658 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
665 hsearch_r(e, FIND, &ep, &env_htab, 0);
667 return ep ? ep->data : NULL;
670 /* restricted capabilities before import */
671 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
672 return (char *)(gd->env_buf);
678 * Look up variable from environment for restricted C runtime env.
680 int env_get_f(const char *name, char *buf, unsigned len)
684 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
687 for (nxt = i; (c = env_get_char(nxt)) != '\0'; ++nxt) {
690 if (nxt >= CONFIG_ENV_SIZE)
694 val = envmatch((uchar *)name, i);
698 /* found; copy out */
699 for (n = 0; n < len; ++n, ++buf) {
700 c = env_get_char(val++);
711 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
721 * Decode the integer value of an environment variable and return it.
723 * @param name Name of environemnt variable
724 * @param base Number base to use (normally 10, or 16 for hex)
725 * @param default_val Default value to return if the variable is not
727 * @return the decoded value, or default_val if not found
729 ulong env_get_ulong(const char *name, int base, ulong default_val)
732 * We can use env_get() here, even before relocation, since the
733 * environment variable value is an integer and thus short.
735 const char *str = env_get(name);
737 return str ? simple_strtoul(str, NULL, base) : default_val;
740 #ifndef CONFIG_SPL_BUILD
741 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
742 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
745 return env_save() ? 1 : 0;
749 saveenv, 1, 0, do_env_save,
750 "save environment variables to persistent storage",
754 #endif /* CONFIG_SPL_BUILD */
758 * Match a name / name=value pair
760 * s1 is either a simple 'name', or a 'name=value' pair.
761 * i2 is the environment index for a 'name2=value2' pair.
762 * If the names match, return the index for the value2, else -1.
764 int envmatch(uchar *s1, int i2)
769 while (*s1 == env_get_char(i2++))
773 if (*s1 == '\0' && env_get_char(i2-1) == '=')
779 #ifndef CONFIG_SPL_BUILD
780 static int do_env_default(cmd_tbl_t *cmdtp, int __flag,
781 int argc, char * const argv[])
783 int all = 0, flag = 0;
785 debug("Initial value for argc=%d\n", argc);
786 while (--argc > 0 && **++argv == '-') {
791 case 'a': /* default all */
794 case 'f': /* force */
798 return cmd_usage(cmdtp);
802 debug("Final value for argc=%d\n", argc);
803 if (all && (argc == 0)) {
804 /* Reset the whole environment */
805 set_default_env("## Resetting to default environment\n");
808 if (!all && (argc > 0)) {
809 /* Reset individual variables */
810 set_default_vars(argc, argv);
814 return cmd_usage(cmdtp);
817 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
818 int argc, char * const argv[])
820 int env_flag = H_INTERACTIVE;
823 debug("Initial value for argc=%d\n", argc);
824 while (argc > 1 && **(argv + 1) == '-') {
830 case 'f': /* force */
834 return CMD_RET_USAGE;
838 debug("Final value for argc=%d\n", argc);
843 char *name = *++argv;
845 if (!hdelete_r(name, &env_htab, env_flag))
852 #ifdef CONFIG_CMD_EXPORTENV
854 * env export [-t | -b | -c] [-s size] addr [var ...]
855 * -t: export as text format; if size is given, data will be
856 * padded with '\0' bytes; if not, one terminating '\0'
857 * will be added (which is included in the "filesize"
858 * setting so you can for exmple copy this to flash and
859 * keep the termination).
860 * -b: export as binary format (name=value pairs separated by
861 * '\0', list end marked by double "\0\0")
862 * -c: export as checksum protected environment format as
863 * used for example by "saveenv" command
865 * size of output buffer
866 * addr: memory address where environment gets stored
867 * var... List of variable names that get included into the
868 * export. Without arguments, the whole environment gets
871 * With "-c" and size is NOT given, then the export command will
872 * format the data as currently used for the persistent storage,
873 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
874 * prepend a valid CRC32 checksum and, in case of redundant
875 * environment, a "current" redundancy flag. If size is given, this
876 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
877 * checksum and redundancy flag will be inserted.
879 * With "-b" and "-t", always only the real data (including a
880 * terminating '\0' byte) will be written; here the optional size
881 * argument will be used to make sure not to overflow the user
882 * provided buffer; the command will abort if the size is not
883 * sufficient. Any remaining space will be '\0' padded.
885 * On successful return, the variable "filesize" will be set.
886 * Note that filesize includes the trailing/terminating '\0' byte(s).
888 * Usage scenario: create a text snapshot/backup of the current settings:
890 * => env export -t 100000
891 * => era ${backup_addr} +${filesize}
892 * => cp.b 100000 ${backup_addr} ${filesize}
894 * Re-import this snapshot, deleting all other settings:
896 * => env import -d -t ${backup_addr}
898 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
899 int argc, char * const argv[])
903 char *ptr, *cmd, *res;
913 while (--argc > 0 && **++argv == '-') {
917 case 'b': /* raw binary format */
922 case 'c': /* external checksum format */
928 case 's': /* size given */
930 return cmd_usage(cmdtp);
931 size = simple_strtoul(*++argv, NULL, 16);
933 case 't': /* text format */
939 return CMD_RET_USAGE;
946 return CMD_RET_USAGE;
948 addr = simple_strtoul(argv[0], NULL, 16);
949 ptr = map_sysmem(addr, size);
952 memset(ptr, '\0', size);
957 if (sep) { /* export as text file */
958 len = hexport_r(&env_htab, sep,
959 H_MATCH_KEY | H_MATCH_IDENT,
960 &ptr, size, argc, argv);
962 pr_err("Cannot export environment: errno = %d\n", errno);
965 sprintf(buf, "%zX", (size_t)len);
966 env_set("filesize", buf);
973 if (chk) /* export as checksum protected block */
974 res = (char *)envp->data;
975 else /* export as raw binary data */
978 len = hexport_r(&env_htab, '\0',
979 H_MATCH_KEY | H_MATCH_IDENT,
980 &res, ENV_SIZE, argc, argv);
982 pr_err("Cannot export environment: errno = %d\n", errno);
987 envp->crc = crc32(0, envp->data, ENV_SIZE);
988 #ifdef CONFIG_ENV_ADDR_REDUND
989 envp->flags = ACTIVE_FLAG;
992 env_set_hex("filesize", len + offsetof(env_t, data));
997 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd);
1002 #ifdef CONFIG_CMD_IMPORTENV
1004 * env import [-d] [-t [-r] | -b | -c] addr [size]
1005 * -d: delete existing environment before importing;
1006 * otherwise overwrite / append to existing definitions
1007 * -t: assume text format; either "size" must be given or the
1008 * text data must be '\0' terminated
1009 * -r: handle CRLF like LF, that means exported variables with
1010 * a content which ends with \r won't get imported. Used
1011 * to import text files created with editors which are using CRLF
1012 * for line endings. Only effective in addition to -t.
1013 * -b: assume binary format ('\0' separated, "\0\0" terminated)
1014 * -c: assume checksum protected environment format
1015 * addr: memory address to read from
1016 * size: length of input data; if missing, proper '\0'
1017 * termination is mandatory
1019 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
1020 int argc, char * const argv[])
1033 while (--argc > 0 && **++argv == '-') {
1037 case 'b': /* raw binary format */
1042 case 'c': /* external checksum format */
1048 case 't': /* text format */
1053 case 'r': /* handle CRLF like LF */
1060 return CMD_RET_USAGE;
1066 return CMD_RET_USAGE;
1069 printf("## Warning: defaulting to text format\n");
1071 if (sep != '\n' && crlf_is_lf )
1074 addr = simple_strtoul(argv[0], NULL, 16);
1075 ptr = map_sysmem(addr, 0);
1078 size = simple_strtoul(argv[1], NULL, 16);
1079 } else if (argc == 1 && chk) {
1080 puts("## Error: external checksum format must pass size\n");
1081 return CMD_RET_FAILURE;
1087 while (size < MAX_ENV_SIZE) {
1088 if ((*s == sep) && (*(s+1) == '\0'))
1093 if (size == MAX_ENV_SIZE) {
1094 printf("## Warning: Input data exceeds %d bytes"
1095 " - truncated\n", MAX_ENV_SIZE);
1098 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1103 env_t *ep = (env_t *)ptr;
1105 size -= offsetof(env_t, data);
1106 memcpy(&crc, &ep->crc, sizeof(crc));
1108 if (crc32(0, ep->data, size) != crc) {
1109 puts("## Error: bad CRC, import failed\n");
1112 ptr = (char *)ep->data;
1115 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1116 crlf_is_lf, 0, NULL) == 0) {
1117 pr_err("Environment import failed: errno = %d\n", errno);
1120 gd->flags |= GD_FLG_ENV_READY;
1125 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1131 #if defined(CONFIG_CMD_ENV_EXISTS)
1132 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1133 char * const argv[])
1138 return CMD_RET_USAGE;
1142 hsearch_r(e, FIND, &ep, &env_htab, 0);
1144 return (ep == NULL) ? 1 : 0;
1149 * New command line interface: "env" command with subcommands
1151 static cmd_tbl_t cmd_env_sub[] = {
1152 #if defined(CONFIG_CMD_ASKENV)
1153 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1155 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1156 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1157 #if defined(CONFIG_CMD_EDITENV)
1158 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1160 #if defined(CONFIG_CMD_ENV_CALLBACK)
1161 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1163 #if defined(CONFIG_CMD_ENV_FLAGS)
1164 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1166 #if defined(CONFIG_CMD_EXPORTENV)
1167 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1169 #if defined(CONFIG_CMD_GREPENV)
1170 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1172 #if defined(CONFIG_CMD_IMPORTENV)
1173 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1175 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1176 #if defined(CONFIG_CMD_RUN)
1177 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1179 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1180 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1182 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1183 #if defined(CONFIG_CMD_ENV_EXISTS)
1184 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1188 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1189 void env_reloc(void)
1191 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1195 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1200 return CMD_RET_USAGE;
1202 /* drop initial "env" arg */
1206 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1209 return cp->cmd(cmdtp, flag, argc, argv);
1211 return CMD_RET_USAGE;
1214 #ifdef CONFIG_SYS_LONGHELP
1215 static char env_help_text[] =
1216 #if defined(CONFIG_CMD_ASKENV)
1217 "ask name [message] [size] - ask for environment variable\nenv "
1219 #if defined(CONFIG_CMD_ENV_CALLBACK)
1220 "callbacks - print callbacks and their associated variables\nenv "
1222 "default [-f] -a - [forcibly] reset default environment\n"
1223 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1224 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1225 #if defined(CONFIG_CMD_EDITENV)
1226 "env edit name - edit environment variable\n"
1228 #if defined(CONFIG_CMD_ENV_EXISTS)
1229 "env exists name - tests for existence of variable\n"
1231 #if defined(CONFIG_CMD_EXPORTENV)
1232 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1234 #if defined(CONFIG_CMD_ENV_FLAGS)
1235 "env flags - print variables that have non-default flags\n"
1237 #if defined(CONFIG_CMD_GREPENV)
1239 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1241 "env grep [-n | -v | -b] string [...] - search environment\n"
1244 #if defined(CONFIG_CMD_IMPORTENV)
1245 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1247 "env print [-a | name ...] - print environment\n"
1248 #if defined(CONFIG_CMD_RUN)
1249 "env run var [...] - run commands in an environment variable\n"
1251 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1252 "env save - save environment\n"
1254 "env set [-f] name [arg ...]\n";
1258 env, CONFIG_SYS_MAXARGS, 1, do_env,
1259 "environment handling commands", env_help_text
1263 * Old command line interface, kept for compatibility
1266 #if defined(CONFIG_CMD_EDITENV)
1267 U_BOOT_CMD_COMPLETE(
1268 editenv, 2, 0, do_env_edit,
1269 "edit environment variable",
1271 " - edit environment variable 'name'",
1276 U_BOOT_CMD_COMPLETE(
1277 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1278 "print environment variables",
1279 "[-a]\n - print [all] values of all environment variables\n"
1280 "printenv name ...\n"
1281 " - print value of environment variable 'name'",
1285 #ifdef CONFIG_CMD_GREPENV
1286 U_BOOT_CMD_COMPLETE(
1287 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1288 "search environment variables",
1290 "[-e] [-n | -v | -b] string ...\n"
1292 "[-n | -v | -b] string ...\n"
1294 " - list environment name=value pairs matching 'string'\n"
1296 " \"-e\": enable regular expressions;\n"
1298 " \"-n\": search variable names; \"-v\": search values;\n"
1299 " \"-b\": search both names and values (default)",
1304 U_BOOT_CMD_COMPLETE(
1305 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1306 "set environment variables",
1307 "[-f] name value ...\n"
1308 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1309 "setenv [-f] name\n"
1310 " - [forcibly] delete environment variable 'name'",
1314 #if defined(CONFIG_CMD_ASKENV)
1317 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1318 "get environment variables from stdin",
1319 "name [message] [size]\n"
1320 " - get environment variable 'name' from stdin (max 'size' chars)"
1324 #if defined(CONFIG_CMD_RUN)
1325 U_BOOT_CMD_COMPLETE(
1326 run, CONFIG_SYS_MAXARGS, 1, do_run,
1327 "run commands in an environment variable",
1329 " - run the commands in the environment variable(s) 'var'",
1333 #endif /* CONFIG_SPL_BUILD */