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_MMC) && \
46 !defined(CONFIG_ENV_IS_IN_FAT) && \
47 !defined(CONFIG_ENV_IS_IN_EXT4) && \
48 !defined(CONFIG_ENV_IS_IN_NAND) && \
49 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
50 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
51 !defined(CONFIG_ENV_IS_IN_SATA) && \
52 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
53 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
54 !defined(CONFIG_ENV_IS_IN_UBI) && \
55 !defined(CONFIG_ENV_IS_NOWHERE)
56 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
57 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
61 * Maximum expected input data size for import command
63 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
66 * This variable is incremented on each do_env_set(), so it can
67 * be used via get_env_id() as an indication, if the environment
68 * has changed or not. So it is possible to reread an environment
69 * variable only if the environment was changed ... done so for
70 * example in NetInitLoop()
72 static int env_id
= 1;
79 #ifndef CONFIG_SPL_BUILD
81 * Command interface: print one or all environment variables
83 * Returns 0 in case of error, or length of printed string
85 static int env_print(char *name
, int flag
)
90 if (name
) { /* print a single name */
95 hsearch_r(e
, FIND
, &ep
, &env_htab
, flag
);
98 len
= printf("%s=%s\n", ep
->key
, ep
->data
);
102 /* print whole list */
103 len
= hexport_r(&env_htab
, '\n', flag
, &res
, 0, 0, NULL
);
111 /* should never happen */
112 printf("## Error: cannot export environment\n");
116 static int do_env_print(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
121 int env_flag
= H_HIDE_DOT
;
123 if (argc
> 1 && argv
[1][0] == '-' && argv
[1][1] == 'a') {
126 env_flag
&= ~H_HIDE_DOT
;
130 /* print all env vars */
131 rcode
= env_print(NULL
, env_flag
);
134 printf("\nEnvironment size: %d/%ld bytes\n",
135 rcode
, (ulong
)ENV_SIZE
);
139 /* print selected env vars */
140 env_flag
&= ~H_HIDE_DOT
;
141 for (i
= 1; i
< argc
; ++i
) {
142 int rc
= env_print(argv
[i
], env_flag
);
144 printf("## Error: \"%s\" not defined\n", argv
[i
]);
152 #ifdef CONFIG_CMD_GREPENV
153 static int do_env_grep(cmd_tbl_t
*cmdtp
, int flag
,
154 int argc
, char * const argv
[])
157 int len
, grep_how
, grep_what
;
160 return CMD_RET_USAGE
;
162 grep_how
= H_MATCH_SUBSTR
; /* default: substring search */
163 grep_what
= H_MATCH_BOTH
; /* default: grep names and values */
165 while (--argc
> 0 && **++argv
== '-') {
170 case 'e': /* use regex matching */
171 grep_how
= H_MATCH_REGEX
;
174 case 'n': /* grep for name */
175 grep_what
= H_MATCH_KEY
;
177 case 'v': /* grep for value */
178 grep_what
= H_MATCH_DATA
;
180 case 'b': /* grep for both */
181 grep_what
= H_MATCH_BOTH
;
186 return CMD_RET_USAGE
;
192 len
= hexport_r(&env_htab
, '\n',
193 flag
| grep_what
| grep_how
,
194 &res
, 0, argc
, argv
);
207 #endif /* CONFIG_SPL_BUILD */
210 * Set a new environment variable,
211 * or replace or delete an existing one.
213 static int _do_env_set(int flag
, int argc
, char * const argv
[], int env_flag
)
216 char *name
, *value
, *s
;
219 debug("Initial value for argc=%d\n", argc
);
220 while (argc
> 1 && **(argv
+ 1) == '-') {
226 case 'f': /* force */
230 return CMD_RET_USAGE
;
234 debug("Final value for argc=%d\n", argc
);
237 if (strchr(name
, '=')) {
238 printf("## Error: illegal character '='"
239 "in variable name \"%s\"\n", name
);
246 if (argc
< 3 || argv
[2] == NULL
) {
247 int rc
= hdelete_r(name
, &env_htab
, env_flag
);
252 * Insert / replace new value
254 for (i
= 2, len
= 0; i
< argc
; ++i
)
255 len
+= strlen(argv
[i
]) + 1;
259 printf("## Can't malloc %d bytes\n", len
);
262 for (i
= 2, s
= value
; i
< argc
; ++i
) {
265 while ((*s
++ = *v
++) != '\0')
274 hsearch_r(e
, ENTER
, &ep
, &env_htab
, env_flag
);
277 printf("## Error inserting \"%s\" variable, errno=%d\n",
285 int env_set(const char *varname
, const char *varvalue
)
287 const char * const argv
[4] = { "setenv", varname
, varvalue
, NULL
};
289 /* before import into hashtable */
290 if (!(gd
->flags
& GD_FLG_ENV_READY
))
293 if (varvalue
== NULL
|| varvalue
[0] == '\0')
294 return _do_env_set(0, 2, (char * const *)argv
, H_PROGRAMMATIC
);
296 return _do_env_set(0, 3, (char * const *)argv
, H_PROGRAMMATIC
);
300 * Set an environment variable to an integer value
302 * @param varname Environment variable to set
303 * @param value Value to set it to
304 * @return 0 if ok, 1 on error
306 int env_set_ulong(const char *varname
, ulong value
)
308 /* TODO: this should be unsigned */
309 char *str
= simple_itoa(value
);
311 return env_set(varname
, str
);
315 * Set an environment variable to an value in hex
317 * @param varname Environment variable to set
318 * @param value Value to set it to
319 * @return 0 if ok, 1 on error
321 int env_set_hex(const char *varname
, ulong value
)
325 sprintf(str
, "%lx", value
);
326 return env_set(varname
, str
);
329 ulong
env_get_hex(const char *varname
, ulong default_val
)
335 s
= env_get(varname
);
337 value
= simple_strtoul(s
, &endp
, 16);
344 #ifndef CONFIG_SPL_BUILD
345 static int do_env_set(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
348 return CMD_RET_USAGE
;
350 return _do_env_set(flag
, argc
, argv
, H_INTERACTIVE
);
354 * Prompt for environment variable
356 #if defined(CONFIG_CMD_ASKENV)
357 int do_env_ask(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
359 char message
[CONFIG_SYS_CBSIZE
];
360 int i
, len
, pos
, size
;
364 local_args
[0] = argv
[0];
365 local_args
[1] = argv
[1];
366 local_args
[2] = NULL
;
367 local_args
[3] = NULL
;
372 * env_ask envname [message1 ...] [size]
375 return CMD_RET_USAGE
;
378 * We test the last argument if it can be converted
379 * into a decimal number. If yes, we assume it's
380 * the size. Otherwise we echo it as part of the
383 i
= simple_strtoul(argv
[argc
- 1], &endptr
, 10);
384 if (*endptr
!= '\0') { /* no size */
385 size
= CONFIG_SYS_CBSIZE
- 1;
386 } else { /* size given */
392 sprintf(message
, "Please enter '%s': ", argv
[1]);
394 /* env_ask envname message1 ... messagen [size] */
395 for (i
= 2, pos
= 0; i
< argc
&& pos
+1 < sizeof(message
); i
++) {
397 message
[pos
++] = ' ';
399 strncpy(message
+ pos
, argv
[i
], sizeof(message
) - pos
);
400 pos
+= strlen(argv
[i
]);
402 if (pos
< sizeof(message
) - 1) {
403 message
[pos
++] = ' ';
406 message
[CONFIG_SYS_CBSIZE
- 1] = '\0';
409 if (size
>= CONFIG_SYS_CBSIZE
)
410 size
= CONFIG_SYS_CBSIZE
- 1;
415 /* prompt for input */
416 len
= cli_readline(message
);
419 console_buffer
[size
] = '\0';
422 if (console_buffer
[0] != '\0') {
423 local_args
[2] = console_buffer
;
427 /* Continue calling setenv code */
428 return _do_env_set(flag
, len
, local_args
, H_INTERACTIVE
);
432 #if defined(CONFIG_CMD_ENV_CALLBACK)
433 static int print_static_binding(const char *var_name
, const char *callback_name
,
436 printf("\t%-20s %-20s\n", var_name
, callback_name
);
441 static int print_active_callback(ENTRY
*entry
)
443 struct env_clbk_tbl
*clbkp
;
447 if (entry
->callback
== NULL
)
450 /* look up the callback in the linker-list */
451 num_callbacks
= ll_entry_count(struct env_clbk_tbl
, env_clbk
);
452 for (i
= 0, clbkp
= ll_entry_start(struct env_clbk_tbl
, env_clbk
);
455 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
456 if (entry
->callback
== clbkp
->callback
+ gd
->reloc_off
)
458 if (entry
->callback
== clbkp
->callback
)
463 if (i
== num_callbacks
)
464 /* this should probably never happen, but just in case... */
465 printf("\t%-20s %p\n", entry
->key
, entry
->callback
);
467 printf("\t%-20s %-20s\n", entry
->key
, clbkp
->name
);
473 * Print the callbacks available and what they are bound to
475 int do_env_callback(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
477 struct env_clbk_tbl
*clbkp
;
481 /* Print the available callbacks */
482 puts("Available callbacks:\n");
483 puts("\tCallback Name\n");
484 puts("\t-------------\n");
485 num_callbacks
= ll_entry_count(struct env_clbk_tbl
, env_clbk
);
486 for (i
= 0, clbkp
= ll_entry_start(struct env_clbk_tbl
, env_clbk
);
489 printf("\t%s\n", clbkp
->name
);
492 /* Print the static bindings that may exist */
493 puts("Static callback bindings:\n");
494 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
495 printf("\t%-20s %-20s\n", "-------------", "-------------");
496 env_attr_walk(ENV_CALLBACK_LIST_STATIC
, print_static_binding
, NULL
);
499 /* walk through each variable and print the callback if it has one */
500 puts("Active callback bindings:\n");
501 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
502 printf("\t%-20s %-20s\n", "-------------", "-------------");
503 hwalk_r(&env_htab
, print_active_callback
);
508 #if defined(CONFIG_CMD_ENV_FLAGS)
509 static int print_static_flags(const char *var_name
, const char *flags
,
512 enum env_flags_vartype type
= env_flags_parse_vartype(flags
);
513 enum env_flags_varaccess access
= env_flags_parse_varaccess(flags
);
515 printf("\t%-20s %-20s %-20s\n", var_name
,
516 env_flags_get_vartype_name(type
),
517 env_flags_get_varaccess_name(access
));
522 static int print_active_flags(ENTRY
*entry
)
524 enum env_flags_vartype type
;
525 enum env_flags_varaccess access
;
527 if (entry
->flags
== 0)
530 type
= (enum env_flags_vartype
)
531 (entry
->flags
& ENV_FLAGS_VARTYPE_BIN_MASK
);
532 access
= env_flags_parse_varaccess_from_binflags(entry
->flags
);
533 printf("\t%-20s %-20s %-20s\n", entry
->key
,
534 env_flags_get_vartype_name(type
),
535 env_flags_get_varaccess_name(access
));
541 * Print the flags available and what variables have flags
543 int do_env_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
545 /* Print the available variable types */
546 printf("Available variable type flags (position %d):\n",
547 ENV_FLAGS_VARTYPE_LOC
);
548 puts("\tFlag\tVariable Type Name\n");
549 puts("\t----\t------------------\n");
550 env_flags_print_vartypes();
553 /* Print the available variable access types */
554 printf("Available variable access flags (position %d):\n",
555 ENV_FLAGS_VARACCESS_LOC
);
556 puts("\tFlag\tVariable Access Name\n");
557 puts("\t----\t--------------------\n");
558 env_flags_print_varaccess();
561 /* Print the static flags that may exist */
562 puts("Static flags:\n");
563 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
565 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
567 env_attr_walk(ENV_FLAGS_LIST_STATIC
, print_static_flags
, NULL
);
570 /* walk through each variable and print the flags if non-default */
571 puts("Active flags:\n");
572 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
574 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
576 hwalk_r(&env_htab
, print_active_flags
);
582 * Interactively edit an environment variable
584 #if defined(CONFIG_CMD_EDITENV)
585 static int do_env_edit(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
588 char buffer
[CONFIG_SYS_CBSIZE
];
592 return CMD_RET_USAGE
;
594 /* before import into hashtable */
595 if (!(gd
->flags
& GD_FLG_ENV_READY
))
598 /* Set read buffer to initial value or empty sting */
599 init_val
= env_get(argv
[1]);
601 snprintf(buffer
, CONFIG_SYS_CBSIZE
, "%s", init_val
);
605 if (cli_readline_into_buffer("edit: ", buffer
, 0) < 0)
608 if (buffer
[0] == '\0') {
609 const char * const _argv
[3] = { "setenv", argv
[1], NULL
};
611 return _do_env_set(0, 2, (char * const *)_argv
, H_INTERACTIVE
);
613 const char * const _argv
[4] = { "setenv", argv
[1], buffer
,
616 return _do_env_set(0, 3, (char * const *)_argv
, H_INTERACTIVE
);
619 #endif /* CONFIG_CMD_EDITENV */
620 #endif /* CONFIG_SPL_BUILD */
623 * Look up variable from environment,
624 * return address of storage for that variable,
625 * or NULL if not found
627 char *env_get(const char *name
)
629 if (gd
->flags
& GD_FLG_ENV_READY
) { /* after import into hashtable */
636 hsearch_r(e
, FIND
, &ep
, &env_htab
, 0);
638 return ep
? ep
->data
: NULL
;
641 /* restricted capabilities before import */
642 if (env_get_f(name
, (char *)(gd
->env_buf
), sizeof(gd
->env_buf
)) > 0)
643 return (char *)(gd
->env_buf
);
649 * Look up variable from environment for restricted C runtime env.
651 int env_get_f(const char *name
, char *buf
, unsigned len
)
655 for (i
= 0; env_get_char(i
) != '\0'; i
= nxt
+ 1) {
658 for (nxt
= i
; (c
= env_get_char(nxt
)) != '\0'; ++nxt
) {
661 if (nxt
>= CONFIG_ENV_SIZE
)
665 val
= envmatch((uchar
*)name
, i
);
669 /* found; copy out */
670 for (n
= 0; n
< len
; ++n
, ++buf
) {
671 c
= env_get_char(val
++);
682 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
692 * Decode the integer value of an environment variable and return it.
694 * @param name Name of environemnt variable
695 * @param base Number base to use (normally 10, or 16 for hex)
696 * @param default_val Default value to return if the variable is not
698 * @return the decoded value, or default_val if not found
700 ulong
env_get_ulong(const char *name
, int base
, ulong default_val
)
703 * We can use env_get() here, even before relocation, since the
704 * environment variable value is an integer and thus short.
706 const char *str
= env_get(name
);
708 return str
? simple_strtoul(str
, NULL
, base
) : default_val
;
711 #ifndef CONFIG_SPL_BUILD
712 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
713 static int do_env_save(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
716 return env_save() ? 1 : 0;
720 saveenv
, 1, 0, do_env_save
,
721 "save environment variables to persistent storage",
725 #endif /* CONFIG_SPL_BUILD */
729 * Match a name / name=value pair
731 * s1 is either a simple 'name', or a 'name=value' pair.
732 * i2 is the environment index for a 'name2=value2' pair.
733 * If the names match, return the index for the value2, else -1.
735 int envmatch(uchar
*s1
, int i2
)
740 while (*s1
== env_get_char(i2
++))
744 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
750 #ifndef CONFIG_SPL_BUILD
751 static int do_env_default(cmd_tbl_t
*cmdtp
, int __flag
,
752 int argc
, char * const argv
[])
754 int all
= 0, flag
= 0;
756 debug("Initial value for argc=%d\n", argc
);
757 while (--argc
> 0 && **++argv
== '-') {
762 case 'a': /* default all */
765 case 'f': /* force */
769 return cmd_usage(cmdtp
);
773 debug("Final value for argc=%d\n", argc
);
774 if (all
&& (argc
== 0)) {
775 /* Reset the whole environment */
776 set_default_env("## Resetting to default environment\n");
779 if (!all
&& (argc
> 0)) {
780 /* Reset individual variables */
781 set_default_vars(argc
, argv
);
785 return cmd_usage(cmdtp
);
788 static int do_env_delete(cmd_tbl_t
*cmdtp
, int flag
,
789 int argc
, char * const argv
[])
791 int env_flag
= H_INTERACTIVE
;
794 debug("Initial value for argc=%d\n", argc
);
795 while (argc
> 1 && **(argv
+ 1) == '-') {
801 case 'f': /* force */
805 return CMD_RET_USAGE
;
809 debug("Final value for argc=%d\n", argc
);
814 char *name
= *++argv
;
816 if (!hdelete_r(name
, &env_htab
, env_flag
))
823 #ifdef CONFIG_CMD_EXPORTENV
825 * env export [-t | -b | -c] [-s size] addr [var ...]
826 * -t: export as text format; if size is given, data will be
827 * padded with '\0' bytes; if not, one terminating '\0'
828 * will be added (which is included in the "filesize"
829 * setting so you can for exmple copy this to flash and
830 * keep the termination).
831 * -b: export as binary format (name=value pairs separated by
832 * '\0', list end marked by double "\0\0")
833 * -c: export as checksum protected environment format as
834 * used for example by "saveenv" command
836 * size of output buffer
837 * addr: memory address where environment gets stored
838 * var... List of variable names that get included into the
839 * export. Without arguments, the whole environment gets
842 * With "-c" and size is NOT given, then the export command will
843 * format the data as currently used for the persistent storage,
844 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
845 * prepend a valid CRC32 checksum and, in case of redundant
846 * environment, a "current" redundancy flag. If size is given, this
847 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
848 * checksum and redundancy flag will be inserted.
850 * With "-b" and "-t", always only the real data (including a
851 * terminating '\0' byte) will be written; here the optional size
852 * argument will be used to make sure not to overflow the user
853 * provided buffer; the command will abort if the size is not
854 * sufficient. Any remaining space will be '\0' padded.
856 * On successful return, the variable "filesize" will be set.
857 * Note that filesize includes the trailing/terminating '\0' byte(s).
859 * Usage scenario: create a text snapshot/backup of the current settings:
861 * => env export -t 100000
862 * => era ${backup_addr} +${filesize}
863 * => cp.b 100000 ${backup_addr} ${filesize}
865 * Re-import this snapshot, deleting all other settings:
867 * => env import -d -t ${backup_addr}
869 static int do_env_export(cmd_tbl_t
*cmdtp
, int flag
,
870 int argc
, char * const argv
[])
874 char *ptr
, *cmd
, *res
;
884 while (--argc
> 0 && **++argv
== '-') {
888 case 'b': /* raw binary format */
893 case 'c': /* external checksum format */
899 case 's': /* size given */
901 return cmd_usage(cmdtp
);
902 size
= simple_strtoul(*++argv
, NULL
, 16);
904 case 't': /* text format */
910 return CMD_RET_USAGE
;
917 return CMD_RET_USAGE
;
919 addr
= simple_strtoul(argv
[0], NULL
, 16);
920 ptr
= map_sysmem(addr
, size
);
923 memset(ptr
, '\0', size
);
928 if (sep
) { /* export as text file */
929 len
= hexport_r(&env_htab
, sep
,
930 H_MATCH_KEY
| H_MATCH_IDENT
,
931 &ptr
, size
, argc
, argv
);
933 pr_err("Cannot export environment: errno = %d\n", errno
);
936 sprintf(buf
, "%zX", (size_t)len
);
937 env_set("filesize", buf
);
944 if (chk
) /* export as checksum protected block */
945 res
= (char *)envp
->data
;
946 else /* export as raw binary data */
949 len
= hexport_r(&env_htab
, '\0',
950 H_MATCH_KEY
| H_MATCH_IDENT
,
951 &res
, ENV_SIZE
, argc
, argv
);
953 pr_err("Cannot export environment: errno = %d\n", errno
);
958 envp
->crc
= crc32(0, envp
->data
, ENV_SIZE
);
959 #ifdef CONFIG_ENV_ADDR_REDUND
960 envp
->flags
= ACTIVE_FLAG
;
963 env_set_hex("filesize", len
+ offsetof(env_t
, data
));
968 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd
);
973 #ifdef CONFIG_CMD_IMPORTENV
975 * env import [-d] [-t [-r] | -b | -c] addr [size]
976 * -d: delete existing environment before importing;
977 * otherwise overwrite / append to existing definitions
978 * -t: assume text format; either "size" must be given or the
979 * text data must be '\0' terminated
980 * -r: handle CRLF like LF, that means exported variables with
981 * a content which ends with \r won't get imported. Used
982 * to import text files created with editors which are using CRLF
983 * for line endings. Only effective in addition to -t.
984 * -b: assume binary format ('\0' separated, "\0\0" terminated)
985 * -c: assume checksum protected environment format
986 * addr: memory address to read from
987 * size: length of input data; if missing, proper '\0'
988 * termination is mandatory
990 static int do_env_import(cmd_tbl_t
*cmdtp
, int flag
,
991 int argc
, char * const argv
[])
1004 while (--argc
> 0 && **++argv
== '-') {
1008 case 'b': /* raw binary format */
1013 case 'c': /* external checksum format */
1019 case 't': /* text format */
1024 case 'r': /* handle CRLF like LF */
1031 return CMD_RET_USAGE
;
1037 return CMD_RET_USAGE
;
1040 printf("## Warning: defaulting to text format\n");
1042 if (sep
!= '\n' && crlf_is_lf
)
1045 addr
= simple_strtoul(argv
[0], NULL
, 16);
1046 ptr
= map_sysmem(addr
, 0);
1049 size
= simple_strtoul(argv
[1], NULL
, 16);
1050 } else if (argc
== 1 && chk
) {
1051 puts("## Error: external checksum format must pass size\n");
1052 return CMD_RET_FAILURE
;
1058 while (size
< MAX_ENV_SIZE
) {
1059 if ((*s
== sep
) && (*(s
+1) == '\0'))
1064 if (size
== MAX_ENV_SIZE
) {
1065 printf("## Warning: Input data exceeds %d bytes"
1066 " - truncated\n", MAX_ENV_SIZE
);
1069 printf("## Info: input data size = %zu = 0x%zX\n", size
, size
);
1074 env_t
*ep
= (env_t
*)ptr
;
1076 size
-= offsetof(env_t
, data
);
1077 memcpy(&crc
, &ep
->crc
, sizeof(crc
));
1079 if (crc32(0, ep
->data
, size
) != crc
) {
1080 puts("## Error: bad CRC, import failed\n");
1083 ptr
= (char *)ep
->data
;
1086 if (himport_r(&env_htab
, ptr
, size
, sep
, del
? 0 : H_NOCLEAR
,
1087 crlf_is_lf
, 0, NULL
) == 0) {
1088 pr_err("Environment import failed: errno = %d\n", errno
);
1091 gd
->flags
|= GD_FLG_ENV_READY
;
1096 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1102 #if defined(CONFIG_CMD_ENV_EXISTS)
1103 static int do_env_exists(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1104 char * const argv
[])
1109 return CMD_RET_USAGE
;
1113 hsearch_r(e
, FIND
, &ep
, &env_htab
, 0);
1115 return (ep
== NULL
) ? 1 : 0;
1120 * New command line interface: "env" command with subcommands
1122 static cmd_tbl_t cmd_env_sub
[] = {
1123 #if defined(CONFIG_CMD_ASKENV)
1124 U_BOOT_CMD_MKENT(ask
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
, "", ""),
1126 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default
, "", ""),
1127 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS
, 0, do_env_delete
, "", ""),
1128 #if defined(CONFIG_CMD_EDITENV)
1129 U_BOOT_CMD_MKENT(edit
, 2, 0, do_env_edit
, "", ""),
1131 #if defined(CONFIG_CMD_ENV_CALLBACK)
1132 U_BOOT_CMD_MKENT(callbacks
, 1, 0, do_env_callback
, "", ""),
1134 #if defined(CONFIG_CMD_ENV_FLAGS)
1135 U_BOOT_CMD_MKENT(flags
, 1, 0, do_env_flags
, "", ""),
1137 #if defined(CONFIG_CMD_EXPORTENV)
1138 U_BOOT_CMD_MKENT(export
, 4, 0, do_env_export
, "", ""),
1140 #if defined(CONFIG_CMD_GREPENV)
1141 U_BOOT_CMD_MKENT(grep
, CONFIG_SYS_MAXARGS
, 1, do_env_grep
, "", ""),
1143 #if defined(CONFIG_CMD_IMPORTENV)
1144 U_BOOT_CMD_MKENT(import
, 5, 0, do_env_import
, "", ""),
1146 U_BOOT_CMD_MKENT(print
, CONFIG_SYS_MAXARGS
, 1, do_env_print
, "", ""),
1147 #if defined(CONFIG_CMD_RUN)
1148 U_BOOT_CMD_MKENT(run
, CONFIG_SYS_MAXARGS
, 1, do_run
, "", ""),
1150 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1151 U_BOOT_CMD_MKENT(save
, 1, 0, do_env_save
, "", ""),
1153 U_BOOT_CMD_MKENT(set
, CONFIG_SYS_MAXARGS
, 0, do_env_set
, "", ""),
1154 #if defined(CONFIG_CMD_ENV_EXISTS)
1155 U_BOOT_CMD_MKENT(exists
, 2, 0, do_env_exists
, "", ""),
1159 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1160 void env_reloc(void)
1162 fixup_cmdtable(cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
1166 static int do_env(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1171 return CMD_RET_USAGE
;
1173 /* drop initial "env" arg */
1177 cp
= find_cmd_tbl(argv
[0], cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
1180 return cp
->cmd(cmdtp
, flag
, argc
, argv
);
1182 return CMD_RET_USAGE
;
1185 #ifdef CONFIG_SYS_LONGHELP
1186 static char env_help_text
[] =
1187 #if defined(CONFIG_CMD_ASKENV)
1188 "ask name [message] [size] - ask for environment variable\nenv "
1190 #if defined(CONFIG_CMD_ENV_CALLBACK)
1191 "callbacks - print callbacks and their associated variables\nenv "
1193 "default [-f] -a - [forcibly] reset default environment\n"
1194 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1195 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1196 #if defined(CONFIG_CMD_EDITENV)
1197 "env edit name - edit environment variable\n"
1199 #if defined(CONFIG_CMD_ENV_EXISTS)
1200 "env exists name - tests for existence of variable\n"
1202 #if defined(CONFIG_CMD_EXPORTENV)
1203 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1205 #if defined(CONFIG_CMD_ENV_FLAGS)
1206 "env flags - print variables that have non-default flags\n"
1208 #if defined(CONFIG_CMD_GREPENV)
1210 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1212 "env grep [-n | -v | -b] string [...] - search environment\n"
1215 #if defined(CONFIG_CMD_IMPORTENV)
1216 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1218 "env print [-a | name ...] - print environment\n"
1219 #if defined(CONFIG_CMD_RUN)
1220 "env run var [...] - run commands in an environment variable\n"
1222 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1223 "env save - save environment\n"
1225 "env set [-f] name [arg ...]\n";
1229 env
, CONFIG_SYS_MAXARGS
, 1, do_env
,
1230 "environment handling commands", env_help_text
1234 * Old command line interface, kept for compatibility
1237 #if defined(CONFIG_CMD_EDITENV)
1238 U_BOOT_CMD_COMPLETE(
1239 editenv
, 2, 0, do_env_edit
,
1240 "edit environment variable",
1242 " - edit environment variable 'name'",
1247 U_BOOT_CMD_COMPLETE(
1248 printenv
, CONFIG_SYS_MAXARGS
, 1, do_env_print
,
1249 "print environment variables",
1250 "[-a]\n - print [all] values of all environment variables\n"
1251 "printenv name ...\n"
1252 " - print value of environment variable 'name'",
1256 #ifdef CONFIG_CMD_GREPENV
1257 U_BOOT_CMD_COMPLETE(
1258 grepenv
, CONFIG_SYS_MAXARGS
, 0, do_env_grep
,
1259 "search environment variables",
1261 "[-e] [-n | -v | -b] string ...\n"
1263 "[-n | -v | -b] string ...\n"
1265 " - list environment name=value pairs matching 'string'\n"
1267 " \"-e\": enable regular expressions;\n"
1269 " \"-n\": search variable names; \"-v\": search values;\n"
1270 " \"-b\": search both names and values (default)",
1275 U_BOOT_CMD_COMPLETE(
1276 setenv
, CONFIG_SYS_MAXARGS
, 0, do_env_set
,
1277 "set environment variables",
1278 "[-f] name value ...\n"
1279 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1280 "setenv [-f] name\n"
1281 " - [forcibly] delete environment variable 'name'",
1285 #if defined(CONFIG_CMD_ASKENV)
1288 askenv
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
,
1289 "get environment variables from stdin",
1290 "name [message] [size]\n"
1291 " - get environment variable 'name' from stdin (max 'size' chars)"
1295 #if defined(CONFIG_CMD_RUN)
1296 U_BOOT_CMD_COMPLETE(
1297 run
, CONFIG_SYS_MAXARGS
, 1, do_run
,
1298 "run commands in an environment variable",
1300 " - run the commands in the environment variable(s) 'var'",
1304 #endif /* CONFIG_SPL_BUILD */