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 error("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 error("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 error("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 */