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 preceeded 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.
30 #include <environment.h>
35 #include <linux/stddef.h>
36 #include <asm/byteorder.h>
39 DECLARE_GLOBAL_DATA_PTR
;
41 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
42 !defined(CONFIG_ENV_IS_IN_FLASH) && \
43 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
44 !defined(CONFIG_ENV_IS_IN_MMC) && \
45 !defined(CONFIG_ENV_IS_IN_FAT) && \
46 !defined(CONFIG_ENV_IS_IN_NAND) && \
47 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
48 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
49 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
50 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
51 !defined(CONFIG_ENV_IS_IN_UBI) && \
52 !defined(CONFIG_ENV_IS_NOWHERE)
53 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
54 SPI_FLASH|NVRAM|MMC|FAT|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
58 * Maximum expected input data size for import command
60 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
63 * This variable is incremented on each do_env_set(), so it can
64 * be used via get_env_id() as an indication, if the environment
65 * has changed or not. So it is possible to reread an environment
66 * variable only if the environment was changed ... done so for
67 * example in NetInitLoop()
69 static int env_id
= 1;
76 #ifndef CONFIG_SPL_BUILD
78 * Command interface: print one or all environment variables
80 * Returns 0 in case of error, or length of printed string
82 static int env_print(char *name
, int flag
)
87 if (name
) { /* print a single name */
92 hsearch_r(e
, FIND
, &ep
, &env_htab
, flag
);
95 len
= printf("%s=%s\n", ep
->key
, ep
->data
);
99 /* print whole list */
100 len
= hexport_r(&env_htab
, '\n', flag
, &res
, 0, 0, NULL
);
108 /* should never happen */
109 printf("## Error: cannot export environment\n");
113 static int do_env_print(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
118 int env_flag
= H_HIDE_DOT
;
120 if (argc
> 1 && argv
[1][0] == '-' && argv
[1][1] == 'a') {
123 env_flag
&= ~H_HIDE_DOT
;
127 /* print all env vars */
128 rcode
= env_print(NULL
, env_flag
);
131 printf("\nEnvironment size: %d/%ld bytes\n",
132 rcode
, (ulong
)ENV_SIZE
);
136 /* print selected env vars */
137 env_flag
&= ~H_HIDE_DOT
;
138 for (i
= 1; i
< argc
; ++i
) {
139 int rc
= env_print(argv
[i
], env_flag
);
141 printf("## Error: \"%s\" not defined\n", argv
[i
]);
149 #ifdef CONFIG_CMD_GREPENV
150 static int do_env_grep(cmd_tbl_t
*cmdtp
, int flag
,
151 int argc
, char * const argv
[])
154 int len
, grep_how
, grep_what
;
157 return CMD_RET_USAGE
;
159 grep_how
= H_MATCH_SUBSTR
; /* default: substring search */
160 grep_what
= H_MATCH_BOTH
; /* default: grep names and values */
162 while (--argc
> 0 && **++argv
== '-') {
167 case 'e': /* use regex matching */
168 grep_how
= H_MATCH_REGEX
;
171 case 'n': /* grep for name */
172 grep_what
= H_MATCH_KEY
;
174 case 'v': /* grep for value */
175 grep_what
= H_MATCH_DATA
;
177 case 'b': /* grep for both */
178 grep_what
= H_MATCH_BOTH
;
183 return CMD_RET_USAGE
;
189 len
= hexport_r(&env_htab
, '\n',
190 flag
| grep_what
| grep_how
,
191 &res
, 0, argc
, argv
);
204 #endif /* CONFIG_SPL_BUILD */
207 * Set a new environment variable,
208 * or replace or delete an existing one.
210 static int _do_env_set(int flag
, int argc
, char * const argv
[])
213 char *name
, *value
, *s
;
215 int env_flag
= H_INTERACTIVE
;
217 debug("Initial value for argc=%d\n", argc
);
218 while (argc
> 1 && **(argv
+ 1) == '-') {
224 case 'f': /* force */
228 return CMD_RET_USAGE
;
232 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 setenv(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
);
295 return _do_env_set(0, 3, (char * const *)argv
);
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 setenv_ulong(const char *varname
, ulong value
)
307 /* TODO: this should be unsigned */
308 char *str
= simple_itoa(value
);
310 return setenv(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 setenv_hex(const char *varname
, ulong value
)
324 sprintf(str
, "%lx", value
);
325 return setenv(varname
, str
);
328 ulong
getenv_hex(const char *varname
, ulong default_val
)
336 value
= simple_strtoul(s
, &endp
, 16);
343 #ifndef CONFIG_SPL_BUILD
344 static int do_env_set(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
347 return CMD_RET_USAGE
;
349 return _do_env_set(flag
, argc
, argv
);
353 * Prompt for environment variable
355 #if defined(CONFIG_CMD_ASKENV)
356 int do_env_ask(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
358 char message
[CONFIG_SYS_CBSIZE
];
359 int i
, len
, pos
, size
;
363 local_args
[0] = argv
[0];
364 local_args
[1] = argv
[1];
365 local_args
[2] = NULL
;
366 local_args
[3] = NULL
;
371 * env_ask envname [message1 ...] [size]
374 return CMD_RET_USAGE
;
377 * We test the last argument if it can be converted
378 * into a decimal number. If yes, we assume it's
379 * the size. Otherwise we echo it as part of the
382 i
= simple_strtoul(argv
[argc
- 1], &endptr
, 10);
383 if (*endptr
!= '\0') { /* no size */
384 size
= CONFIG_SYS_CBSIZE
- 1;
385 } else { /* size given */
391 sprintf(message
, "Please enter '%s': ", argv
[1]);
393 /* env_ask envname message1 ... messagen [size] */
394 for (i
= 2, pos
= 0; i
< argc
; i
++) {
396 message
[pos
++] = ' ';
398 strcpy(message
+ pos
, argv
[i
]);
399 pos
+= strlen(argv
[i
]);
401 message
[pos
++] = ' ';
405 if (size
>= CONFIG_SYS_CBSIZE
)
406 size
= CONFIG_SYS_CBSIZE
- 1;
411 /* prompt for input */
412 len
= readline(message
);
415 console_buffer
[size
] = '\0';
418 if (console_buffer
[0] != '\0') {
419 local_args
[2] = console_buffer
;
423 /* Continue calling setenv code */
424 return _do_env_set(flag
, len
, local_args
);
428 #if defined(CONFIG_CMD_ENV_CALLBACK)
429 static int print_static_binding(const char *var_name
, const char *callback_name
)
431 printf("\t%-20s %-20s\n", var_name
, callback_name
);
436 static int print_active_callback(ENTRY
*entry
)
438 struct env_clbk_tbl
*clbkp
;
442 if (entry
->callback
== NULL
)
445 /* look up the callback in the linker-list */
446 num_callbacks
= ll_entry_count(struct env_clbk_tbl
, env_clbk
);
447 for (i
= 0, clbkp
= ll_entry_start(struct env_clbk_tbl
, env_clbk
);
450 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
451 if (entry
->callback
== clbkp
->callback
+ gd
->reloc_off
)
453 if (entry
->callback
== clbkp
->callback
)
458 if (i
== num_callbacks
)
459 /* this should probably never happen, but just in case... */
460 printf("\t%-20s %p\n", entry
->key
, entry
->callback
);
462 printf("\t%-20s %-20s\n", entry
->key
, clbkp
->name
);
468 * Print the callbacks available and what they are bound to
470 int do_env_callback(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
472 struct env_clbk_tbl
*clbkp
;
476 /* Print the available callbacks */
477 puts("Available callbacks:\n");
478 puts("\tCallback Name\n");
479 puts("\t-------------\n");
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 printf("\t%s\n", clbkp
->name
);
487 /* Print the static bindings that may exist */
488 puts("Static callback bindings:\n");
489 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
490 printf("\t%-20s %-20s\n", "-------------", "-------------");
491 env_attr_walk(ENV_CALLBACK_LIST_STATIC
, print_static_binding
);
494 /* walk through each variable and print the callback if it has one */
495 puts("Active callback bindings:\n");
496 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
497 printf("\t%-20s %-20s\n", "-------------", "-------------");
498 hwalk_r(&env_htab
, print_active_callback
);
503 #if defined(CONFIG_CMD_ENV_FLAGS)
504 static int print_static_flags(const char *var_name
, const char *flags
)
506 enum env_flags_vartype type
= env_flags_parse_vartype(flags
);
507 enum env_flags_varaccess access
= env_flags_parse_varaccess(flags
);
509 printf("\t%-20s %-20s %-20s\n", var_name
,
510 env_flags_get_vartype_name(type
),
511 env_flags_get_varaccess_name(access
));
516 static int print_active_flags(ENTRY
*entry
)
518 enum env_flags_vartype type
;
519 enum env_flags_varaccess access
;
521 if (entry
->flags
== 0)
524 type
= (enum env_flags_vartype
)
525 (entry
->flags
& ENV_FLAGS_VARTYPE_BIN_MASK
);
526 access
= env_flags_parse_varaccess_from_binflags(entry
->flags
);
527 printf("\t%-20s %-20s %-20s\n", entry
->key
,
528 env_flags_get_vartype_name(type
),
529 env_flags_get_varaccess_name(access
));
535 * Print the flags available and what variables have flags
537 int do_env_flags(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
539 /* Print the available variable types */
540 printf("Available variable type flags (position %d):\n",
541 ENV_FLAGS_VARTYPE_LOC
);
542 puts("\tFlag\tVariable Type Name\n");
543 puts("\t----\t------------------\n");
544 env_flags_print_vartypes();
547 /* Print the available variable access types */
548 printf("Available variable access flags (position %d):\n",
549 ENV_FLAGS_VARACCESS_LOC
);
550 puts("\tFlag\tVariable Access Name\n");
551 puts("\t----\t--------------------\n");
552 env_flags_print_varaccess();
555 /* Print the static flags that may exist */
556 puts("Static flags:\n");
557 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
559 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
561 env_attr_walk(ENV_FLAGS_LIST_STATIC
, print_static_flags
);
564 /* walk through each variable and print the flags if non-default */
565 puts("Active flags:\n");
566 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
568 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
570 hwalk_r(&env_htab
, print_active_flags
);
576 * Interactively edit an environment variable
578 #if defined(CONFIG_CMD_EDITENV)
579 static int do_env_edit(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
582 char buffer
[CONFIG_SYS_CBSIZE
];
586 return CMD_RET_USAGE
;
588 /* Set read buffer to initial value or empty sting */
589 init_val
= getenv(argv
[1]);
591 sprintf(buffer
, "%s", init_val
);
595 if (readline_into_buffer("edit: ", buffer
, 0) < 0)
598 return setenv(argv
[1], buffer
);
600 #endif /* CONFIG_CMD_EDITENV */
601 #endif /* CONFIG_SPL_BUILD */
604 * Look up variable from environment,
605 * return address of storage for that variable,
606 * or NULL if not found
608 char *getenv(const char *name
)
610 if (gd
->flags
& GD_FLG_ENV_READY
) { /* after import into hashtable */
617 hsearch_r(e
, FIND
, &ep
, &env_htab
, 0);
619 return ep
? ep
->data
: NULL
;
622 /* restricted capabilities before import */
623 if (getenv_f(name
, (char *)(gd
->env_buf
), sizeof(gd
->env_buf
)) > 0)
624 return (char *)(gd
->env_buf
);
630 * Look up variable from environment for restricted C runtime env.
632 int getenv_f(const char *name
, char *buf
, unsigned len
)
636 for (i
= 0; env_get_char(i
) != '\0'; i
= nxt
+ 1) {
639 for (nxt
= i
; env_get_char(nxt
) != '\0'; ++nxt
) {
640 if (nxt
>= CONFIG_ENV_SIZE
)
644 val
= envmatch((uchar
*)name
, i
);
648 /* found; copy out */
649 for (n
= 0; n
< len
; ++n
, ++buf
) {
650 *buf
= env_get_char(val
++);
658 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
668 * Decode the integer value of an environment variable and return it.
670 * @param name Name of environemnt variable
671 * @param base Number base to use (normally 10, or 16 for hex)
672 * @param default_val Default value to return if the variable is not
674 * @return the decoded value, or default_val if not found
676 ulong
getenv_ulong(const char *name
, int base
, ulong default_val
)
679 * We can use getenv() here, even before relocation, since the
680 * environment variable value is an integer and thus short.
682 const char *str
= getenv(name
);
684 return str
? simple_strtoul(str
, NULL
, base
) : default_val
;
687 #ifndef CONFIG_SPL_BUILD
688 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
689 static int do_env_save(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
692 printf("Saving Environment to %s...\n", env_name_spec
);
694 return saveenv() ? 1 : 0;
698 saveenv
, 1, 0, do_env_save
,
699 "save environment variables to persistent storage",
703 #endif /* CONFIG_SPL_BUILD */
707 * Match a name / name=value pair
709 * s1 is either a simple 'name', or a 'name=value' pair.
710 * i2 is the environment index for a 'name2=value2' pair.
711 * If the names match, return the index for the value2, else -1.
713 int envmatch(uchar
*s1
, int i2
)
718 while (*s1
== env_get_char(i2
++))
722 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
728 #ifndef CONFIG_SPL_BUILD
729 static int do_env_default(cmd_tbl_t
*cmdtp
, int __flag
,
730 int argc
, char * const argv
[])
732 int all
= 0, flag
= 0;
734 debug("Initial value for argc=%d\n", argc
);
735 while (--argc
> 0 && **++argv
== '-') {
740 case 'a': /* default all */
743 case 'f': /* force */
747 return cmd_usage(cmdtp
);
751 debug("Final value for argc=%d\n", argc
);
752 if (all
&& (argc
== 0)) {
753 /* Reset the whole environment */
754 set_default_env("## Resetting to default environment\n");
757 if (!all
&& (argc
> 0)) {
758 /* Reset individual variables */
759 set_default_vars(argc
, argv
);
763 return cmd_usage(cmdtp
);
766 static int do_env_delete(cmd_tbl_t
*cmdtp
, int flag
,
767 int argc
, char * const argv
[])
769 int env_flag
= H_INTERACTIVE
;
772 debug("Initial value for argc=%d\n", argc
);
773 while (argc
> 1 && **(argv
+ 1) == '-') {
779 case 'f': /* force */
783 return CMD_RET_USAGE
;
787 debug("Final value for argc=%d\n", argc
);
792 char *name
= *++argv
;
794 if (!hdelete_r(name
, &env_htab
, env_flag
))
801 #ifdef CONFIG_CMD_EXPORTENV
803 * env export [-t | -b | -c] [-s size] addr [var ...]
804 * -t: export as text format; if size is given, data will be
805 * padded with '\0' bytes; if not, one terminating '\0'
806 * will be added (which is included in the "filesize"
807 * setting so you can for exmple copy this to flash and
808 * keep the termination).
809 * -b: export as binary format (name=value pairs separated by
810 * '\0', list end marked by double "\0\0")
811 * -c: export as checksum protected environment format as
812 * used for example by "saveenv" command
814 * size of output buffer
815 * addr: memory address where environment gets stored
816 * var... List of variable names that get included into the
817 * export. Without arguments, the whole environment gets
820 * With "-c" and size is NOT given, then the export command will
821 * format the data as currently used for the persistent storage,
822 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
823 * prepend a valid CRC32 checksum and, in case of resundant
824 * environment, a "current" redundancy flag. If size is given, this
825 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
826 * checksum and redundancy flag will be inserted.
828 * With "-b" and "-t", always only the real data (including a
829 * terminating '\0' byte) will be written; here the optional size
830 * argument will be used to make sure not to overflow the user
831 * provided buffer; the command will abort if the size is not
832 * sufficient. Any remainign space will be '\0' padded.
834 * On successful return, the variable "filesize" will be set.
835 * Note that filesize includes the trailing/terminating '\0' byte(s).
837 * Usage szenario: create a text snapshot/backup of the current settings:
839 * => env export -t 100000
840 * => era ${backup_addr} +${filesize}
841 * => cp.b 100000 ${backup_addr} ${filesize}
843 * Re-import this snapshot, deleting all other settings:
845 * => env import -d -t ${backup_addr}
847 static int do_env_export(cmd_tbl_t
*cmdtp
, int flag
,
848 int argc
, char * const argv
[])
852 char *ptr
, *cmd
, *res
;
862 while (--argc
> 0 && **++argv
== '-') {
866 case 'b': /* raw binary format */
871 case 'c': /* external checksum format */
877 case 's': /* size given */
879 return cmd_usage(cmdtp
);
880 size
= simple_strtoul(*++argv
, NULL
, 16);
882 case 't': /* text format */
888 return CMD_RET_USAGE
;
895 return CMD_RET_USAGE
;
897 addr
= simple_strtoul(argv
[0], NULL
, 16);
898 ptr
= map_sysmem(addr
, size
);
901 memset(ptr
, '\0', size
);
906 if (sep
) { /* export as text file */
907 len
= hexport_r(&env_htab
, sep
,
908 H_MATCH_KEY
| H_MATCH_IDENT
,
909 &ptr
, size
, argc
, argv
);
911 error("Cannot export environment: errno = %d\n", errno
);
914 sprintf(buf
, "%zX", (size_t)len
);
915 setenv("filesize", buf
);
922 if (chk
) /* export as checksum protected block */
923 res
= (char *)envp
->data
;
924 else /* export as raw binary data */
927 len
= hexport_r(&env_htab
, '\0',
928 H_MATCH_KEY
| H_MATCH_IDENT
,
929 &res
, ENV_SIZE
, argc
, argv
);
931 error("Cannot export environment: errno = %d\n", errno
);
936 envp
->crc
= crc32(0, envp
->data
, ENV_SIZE
);
937 #ifdef CONFIG_ENV_ADDR_REDUND
938 envp
->flags
= ACTIVE_FLAG
;
941 setenv_hex("filesize", len
+ offsetof(env_t
, data
));
946 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd
);
951 #ifdef CONFIG_CMD_IMPORTENV
953 * env import [-d] [-t | -b | -c] addr [size]
954 * -d: delete existing environment before importing;
955 * otherwise overwrite / append to existion definitions
956 * -t: assume text format; either "size" must be given or the
957 * text data must be '\0' terminated
958 * -b: assume binary format ('\0' separated, "\0\0" terminated)
959 * -c: assume checksum protected environment format
960 * addr: memory address to read from
961 * size: length of input data; if missing, proper '\0'
962 * termination is mandatory
964 static int do_env_import(cmd_tbl_t
*cmdtp
, int flag
,
965 int argc
, char * const argv
[])
977 while (--argc
> 0 && **++argv
== '-') {
981 case 'b': /* raw binary format */
986 case 'c': /* external checksum format */
992 case 't': /* text format */
1001 return CMD_RET_USAGE
;
1007 return CMD_RET_USAGE
;
1010 printf("## Warning: defaulting to text format\n");
1012 addr
= simple_strtoul(argv
[0], NULL
, 16);
1013 ptr
= map_sysmem(addr
, 0);
1016 size
= simple_strtoul(argv
[1], NULL
, 16);
1017 } else if (argc
== 1 && chk
) {
1018 puts("## Error: external checksum format must pass size\n");
1019 return CMD_RET_FAILURE
;
1025 while (size
< MAX_ENV_SIZE
) {
1026 if ((*s
== sep
) && (*(s
+1) == '\0'))
1031 if (size
== MAX_ENV_SIZE
) {
1032 printf("## Warning: Input data exceeds %d bytes"
1033 " - truncated\n", MAX_ENV_SIZE
);
1036 printf("## Info: input data size = %zu = 0x%zX\n", size
, size
);
1041 env_t
*ep
= (env_t
*)ptr
;
1043 size
-= offsetof(env_t
, data
);
1044 memcpy(&crc
, &ep
->crc
, sizeof(crc
));
1046 if (crc32(0, ep
->data
, size
) != crc
) {
1047 puts("## Error: bad CRC, import failed\n");
1050 ptr
= (char *)ep
->data
;
1053 if (himport_r(&env_htab
, ptr
, size
, sep
, del
? 0 : H_NOCLEAR
, 0,
1055 error("Environment import failed: errno = %d\n", errno
);
1058 gd
->flags
|= GD_FLG_ENV_READY
;
1063 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1069 #if defined(CONFIG_CMD_ENV_EXISTS)
1070 static int do_env_exists(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
1071 char * const argv
[])
1076 return CMD_RET_USAGE
;
1080 hsearch_r(e
, FIND
, &ep
, &env_htab
, 0);
1082 return (ep
== NULL
) ? 1 : 0;
1087 * New command line interface: "env" command with subcommands
1089 static cmd_tbl_t cmd_env_sub
[] = {
1090 #if defined(CONFIG_CMD_ASKENV)
1091 U_BOOT_CMD_MKENT(ask
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
, "", ""),
1093 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default
, "", ""),
1094 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS
, 0, do_env_delete
, "", ""),
1095 #if defined(CONFIG_CMD_EDITENV)
1096 U_BOOT_CMD_MKENT(edit
, 2, 0, do_env_edit
, "", ""),
1098 #if defined(CONFIG_CMD_ENV_CALLBACK)
1099 U_BOOT_CMD_MKENT(callbacks
, 1, 0, do_env_callback
, "", ""),
1101 #if defined(CONFIG_CMD_ENV_FLAGS)
1102 U_BOOT_CMD_MKENT(flags
, 1, 0, do_env_flags
, "", ""),
1104 #if defined(CONFIG_CMD_EXPORTENV)
1105 U_BOOT_CMD_MKENT(export
, 4, 0, do_env_export
, "", ""),
1107 #if defined(CONFIG_CMD_GREPENV)
1108 U_BOOT_CMD_MKENT(grep
, CONFIG_SYS_MAXARGS
, 1, do_env_grep
, "", ""),
1110 #if defined(CONFIG_CMD_IMPORTENV)
1111 U_BOOT_CMD_MKENT(import
, 5, 0, do_env_import
, "", ""),
1113 U_BOOT_CMD_MKENT(print
, CONFIG_SYS_MAXARGS
, 1, do_env_print
, "", ""),
1114 #if defined(CONFIG_CMD_RUN)
1115 U_BOOT_CMD_MKENT(run
, CONFIG_SYS_MAXARGS
, 1, do_run
, "", ""),
1117 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1118 U_BOOT_CMD_MKENT(save
, 1, 0, do_env_save
, "", ""),
1120 U_BOOT_CMD_MKENT(set
, CONFIG_SYS_MAXARGS
, 0, do_env_set
, "", ""),
1121 #if defined(CONFIG_CMD_ENV_EXISTS)
1122 U_BOOT_CMD_MKENT(exists
, 2, 0, do_env_exists
, "", ""),
1126 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1127 void env_reloc(void)
1129 fixup_cmdtable(cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
1133 static int do_env(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1138 return CMD_RET_USAGE
;
1140 /* drop initial "env" arg */
1144 cp
= find_cmd_tbl(argv
[0], cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
1147 return cp
->cmd(cmdtp
, flag
, argc
, argv
);
1149 return CMD_RET_USAGE
;
1152 #ifdef CONFIG_SYS_LONGHELP
1153 static char env_help_text
[] =
1154 #if defined(CONFIG_CMD_ASKENV)
1155 "ask name [message] [size] - ask for environment variable\nenv "
1157 #if defined(CONFIG_CMD_ENV_CALLBACK)
1158 "callbacks - print callbacks and their associated variables\nenv "
1160 "default [-f] -a - [forcibly] reset default environment\n"
1161 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1162 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1163 #if defined(CONFIG_CMD_EDITENV)
1164 "env edit name - edit environment variable\n"
1166 #if defined(CONFIG_CMD_ENV_EXISTS)
1167 "env exists name - tests for existence of variable\n"
1169 #if defined(CONFIG_CMD_EXPORTENV)
1170 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1172 #if defined(CONFIG_CMD_ENV_FLAGS)
1173 "env flags - print variables that have non-default flags\n"
1175 #if defined(CONFIG_CMD_GREPENV)
1177 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1179 "env grep [-n | -v | -b] string [...] - search environment\n"
1182 #if defined(CONFIG_CMD_IMPORTENV)
1183 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
1185 "env print [-a | name ...] - print environment\n"
1186 #if defined(CONFIG_CMD_RUN)
1187 "env run var [...] - run commands in an environment variable\n"
1189 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1190 "env save - save environment\n"
1192 "env set [-f] name [arg ...]\n";
1196 env
, CONFIG_SYS_MAXARGS
, 1, do_env
,
1197 "environment handling commands", env_help_text
1201 * Old command line interface, kept for compatibility
1204 #if defined(CONFIG_CMD_EDITENV)
1205 U_BOOT_CMD_COMPLETE(
1206 editenv
, 2, 0, do_env_edit
,
1207 "edit environment variable",
1209 " - edit environment variable 'name'",
1214 U_BOOT_CMD_COMPLETE(
1215 printenv
, CONFIG_SYS_MAXARGS
, 1, do_env_print
,
1216 "print environment variables",
1217 "[-a]\n - print [all] values of all environment variables\n"
1218 "printenv name ...\n"
1219 " - print value of environment variable 'name'",
1223 #ifdef CONFIG_CMD_GREPENV
1224 U_BOOT_CMD_COMPLETE(
1225 grepenv
, CONFIG_SYS_MAXARGS
, 0, do_env_grep
,
1226 "search environment variables",
1228 "[-e] [-n | -v | -b] string ...\n"
1230 "[-n | -v | -b] string ...\n"
1232 " - list environment name=value pairs matching 'string'\n"
1234 " \"-e\": enable regular expressions;\n"
1236 " \"-n\": search variable names; \"-v\": search values;\n"
1237 " \"-b\": search both names and values (default)",
1242 U_BOOT_CMD_COMPLETE(
1243 setenv
, CONFIG_SYS_MAXARGS
, 0, do_env_set
,
1244 "set environment variables",
1245 "[-f] name value ...\n"
1246 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1247 "setenv [-f] name\n"
1248 " - [forcibly] delete environment variable 'name'",
1252 #if defined(CONFIG_CMD_ASKENV)
1255 askenv
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
,
1256 "get environment variables from stdin",
1257 "name [message] [size]\n"
1258 " - get environment variable 'name' from stdin (max 'size' chars)"
1262 #if defined(CONFIG_CMD_RUN)
1263 U_BOOT_CMD_COMPLETE(
1264 run
, CONFIG_SYS_MAXARGS
, 1, do_run
,
1265 "run commands in an environment variable",
1267 " - run the commands in the environment variable(s) 'var'",
1271 #endif /* CONFIG_SPL_BUILD */