2 * (C) Copyright 2000-2010
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 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * Support for persistent environment data
32 * The "environment" is stored on external storage as a list of '\0'
33 * terminated "name=value" strings. The end of the list is marked by
34 * a double '\0'. The environment is preceeded by a 32 bit CRC over
35 * the data part and, in case of redundant environment, a byte of
38 * This linearized representation will also be used before
39 * relocation, i. e. as long as we don't have a full C runtime
40 * environment. After that, we use a hash table.
45 #include <environment.h>
51 #include <linux/stddef.h>
52 #include <asm/byteorder.h>
53 #if defined(CONFIG_CMD_NET)
57 DECLARE_GLOBAL_DATA_PTR
;
59 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \
60 !defined(CONFIG_ENV_IS_IN_FLASH) && \
61 !defined(CONFIG_ENV_IS_IN_DATAFLASH) && \
62 !defined(CONFIG_ENV_IS_IN_MMC) && \
63 !defined(CONFIG_ENV_IS_IN_FAT) && \
64 !defined(CONFIG_ENV_IS_IN_NAND) && \
65 !defined(CONFIG_ENV_IS_IN_NVRAM) && \
66 !defined(CONFIG_ENV_IS_IN_ONENAND) && \
67 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \
68 !defined(CONFIG_ENV_IS_IN_REMOTE) && \
69 !defined(CONFIG_ENV_IS_NOWHERE)
70 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|DATAFLASH|ONENAND|\
71 SPI_FLASH|NVRAM|MMC|FAT|REMOTE} or CONFIG_ENV_IS_NOWHERE
75 #define MK_STR(x) XMK_STR(x)
78 * Maximum expected input data size for import command
80 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
82 ulong load_addr
= CONFIG_SYS_LOAD_ADDR
; /* Default Load Address */
83 ulong save_addr
; /* Default Save Address */
84 ulong save_size
; /* Default Save Size (in bytes) */
87 * Table with supported baudrates (defined in config_xyz.h)
89 static const unsigned long baudrate_table
[] = CONFIG_SYS_BAUDRATE_TABLE
;
90 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
93 * This variable is incremented on each do_env_set(), so it can
94 * be used via get_env_id() as an indication, if the environment
95 * has changed or not. So it is possible to reread an environment
96 * variable only if the environment was changed ... done so for
97 * example in NetInitLoop()
99 static int env_id
= 1;
107 * Command interface: print one or all environment variables
109 * Returns 0 in case of error, or length of printed string
111 static int env_print(char *name
)
116 if (name
) { /* print a single name */
121 hsearch_r(e
, FIND
, &ep
, &env_htab
);
124 len
= printf("%s=%s\n", ep
->key
, ep
->data
);
128 /* print whole list */
129 len
= hexport_r(&env_htab
, '\n', &res
, 0, 0, NULL
);
137 /* should never happen */
141 int do_env_print (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
147 /* print all env vars */
148 rcode
= env_print(NULL
);
151 printf("\nEnvironment size: %d/%ld bytes\n",
152 rcode
, (ulong
)ENV_SIZE
);
156 /* print selected env vars */
157 for (i
= 1; i
< argc
; ++i
) {
158 int rc
= env_print(argv
[i
]);
160 printf("## Error: \"%s\" not defined\n", argv
[i
]);
168 #ifdef CONFIG_CMD_GREPENV
169 static int do_env_grep(cmd_tbl_t
*cmdtp
, int flag
,
170 int argc
, char * const argv
[])
173 unsigned char matched
[env_htab
.size
/ 8];
174 int rcode
= 1, arg
= 1, idx
;
177 return CMD_RET_USAGE
;
179 memset(matched
, 0, env_htab
.size
/ 8);
181 while (arg
<= argc
) {
183 while ((idx
= hstrstr_r(argv
[arg
], idx
, &match
, &env_htab
))) {
184 if (!(matched
[idx
/ 8] & (1 << (idx
& 7)))) {
190 matched
[idx
/ 8] |= 1 << (idx
& 7);
201 * Set a new environment variable,
202 * or replace or delete an existing one.
204 int _do_env_set(int flag
, int argc
, char * const argv
[])
208 char *name
, *value
, *s
;
213 if (strchr(name
, '=')) {
214 printf("## Error: illegal character '=' in variable name"
221 * search if variable with this name already exists
225 hsearch_r(e
, FIND
, &ep
, &env_htab
);
227 /* Check for console redirection */
228 if (strcmp(name
, "stdin") == 0)
230 else if (strcmp(name
, "stdout") == 0)
232 else if (strcmp(name
, "stderr") == 0)
236 if (argc
< 3) { /* Cannot delete it! */
237 printf("Can't delete \"%s\"\n", name
);
241 #ifdef CONFIG_CONSOLE_MUX
242 i
= iomux_doenv(console
, argv
[2]);
246 /* Try assigning specified device */
247 if (console_assign(console
, argv
[2]) < 0)
250 #ifdef CONFIG_SERIAL_MULTI
251 if (serial_assign(argv
[2]) < 0)
254 #endif /* CONFIG_CONSOLE_MUX */
258 * Some variables like "ethaddr" and "serial#" can be set only
259 * once and cannot be deleted; also, "ver" is readonly.
261 if (ep
) { /* variable exists */
262 #ifndef CONFIG_ENV_OVERWRITE
263 if (strcmp(name
, "serial#") == 0 ||
264 (strcmp(name
, "ethaddr") == 0
265 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
266 && strcmp(ep
->data
, MK_STR(CONFIG_ETHADDR
)) != 0
267 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
269 printf("Can't overwrite \"%s\"\n", name
);
274 * Switch to new baudrate if new baudrate is supported
276 if (strcmp(name
, "baudrate") == 0) {
277 int baudrate
= simple_strtoul(argv
[2], NULL
, 10);
279 for (i
= 0; i
< N_BAUDRATES
; ++i
) {
280 if (baudrate
== baudrate_table
[i
])
283 if (i
== N_BAUDRATES
) {
284 printf("## Baudrate %d bps not supported\n",
288 printf("## Switch baudrate to %d bps and"
289 "press ENTER ...\n", baudrate
);
291 gd
->baudrate
= baudrate
;
292 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
293 gd
->bd
->bi_baudrate
= baudrate
;
298 while (getc() != '\r')
304 if (argc
< 3 || argv
[2] == NULL
) {
305 int rc
= hdelete_r(name
, &env_htab
);
310 * Insert / replace new value
312 for (i
= 2, len
= 0; i
< argc
; ++i
)
313 len
+= strlen(argv
[i
]) + 1;
317 printf("## Can't malloc %d bytes\n", len
);
320 for (i
= 2, s
= value
; i
< argc
; ++i
) {
323 while ((*s
++ = *v
++) != '\0')
332 hsearch_r(e
, ENTER
, &ep
, &env_htab
);
335 printf("## Error inserting \"%s\" variable, errno=%d\n",
341 * Some variables should be updated when the corresponding
342 * entry in the environment is changed
344 if (strcmp(argv
[1], "loadaddr") == 0) {
345 load_addr
= simple_strtoul(argv
[2], NULL
, 16);
348 #if defined(CONFIG_CMD_NET)
349 else if (strcmp(argv
[1], "bootfile") == 0) {
350 copy_filename(BootFile
, argv
[2], sizeof(BootFile
));
357 int setenv(const char *varname
, const char *varvalue
)
359 const char * const argv
[4] = { "setenv", varname
, varvalue
, NULL
};
361 if (varvalue
== NULL
|| varvalue
[0] == '\0')
362 return _do_env_set(0, 2, (char * const *)argv
);
364 return _do_env_set(0, 3, (char * const *)argv
);
368 * Set an environment variable to an integer value
370 * @param varname Environmet variable to set
371 * @param value Value to set it to
372 * @return 0 if ok, 1 on error
374 int setenv_ulong(const char *varname
, ulong value
)
376 /* TODO: this should be unsigned */
377 char *str
= simple_itoa(value
);
379 return setenv(varname
, str
);
383 * Set an environment variable to an address in hex
385 * @param varname Environmet variable to set
386 * @param addr Value to set it to
387 * @return 0 if ok, 1 on error
389 int setenv_addr(const char *varname
, const void *addr
)
393 sprintf(str
, "%lx", (uintptr_t)addr
);
394 return setenv(varname
, str
);
397 int do_env_set(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
400 return CMD_RET_USAGE
;
402 return _do_env_set(flag
, argc
, argv
);
406 * Prompt for environment variable
408 #if defined(CONFIG_CMD_ASKENV)
409 int do_env_ask(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
411 char message
[CONFIG_SYS_CBSIZE
];
412 int size
= CONFIG_SYS_CBSIZE
- 1;
416 local_args
[0] = argv
[0];
417 local_args
[1] = argv
[1];
418 local_args
[2] = NULL
;
419 local_args
[3] = NULL
;
421 /* Check the syntax */
424 return CMD_RET_USAGE
;
426 case 2: /* env_ask envname */
427 sprintf(message
, "Please enter '%s':", argv
[1]);
430 case 3: /* env_ask envname size */
431 sprintf(message
, "Please enter '%s':", argv
[1]);
432 size
= simple_strtoul(argv
[2], NULL
, 10);
435 default: /* env_ask envname message1 ... messagen size */
436 for (i
= 2, pos
= 0; i
< argc
- 1; i
++) {
438 message
[pos
++] = ' ';
440 strcpy(message
+ pos
, argv
[i
]);
441 pos
+= strlen(argv
[i
]);
445 size
= simple_strtoul(argv
[argc
- 1], NULL
, 10);
449 if (size
>= CONFIG_SYS_CBSIZE
)
450 size
= CONFIG_SYS_CBSIZE
- 1;
455 /* prompt for input */
456 len
= readline(message
);
459 console_buffer
[size
] = '\0';
462 if (console_buffer
[0] != '\0') {
463 local_args
[2] = console_buffer
;
467 /* Continue calling setenv code */
468 return _do_env_set(flag
, len
, local_args
);
473 * Interactively edit an environment variable
475 #if defined(CONFIG_CMD_EDITENV)
476 int do_env_edit(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
478 char buffer
[CONFIG_SYS_CBSIZE
];
482 return CMD_RET_USAGE
;
484 /* Set read buffer to initial value or empty sting */
485 init_val
= getenv(argv
[1]);
487 sprintf(buffer
, "%s", init_val
);
491 readline_into_buffer("edit: ", buffer
, 0);
493 return setenv(argv
[1], buffer
);
495 #endif /* CONFIG_CMD_EDITENV */
498 * Look up variable from environment,
499 * return address of storage for that variable,
500 * or NULL if not found
502 char *getenv(const char *name
)
504 if (gd
->flags
& GD_FLG_ENV_READY
) { /* after import into hashtable */
511 hsearch_r(e
, FIND
, &ep
, &env_htab
);
513 return ep
? ep
->data
: NULL
;
516 /* restricted capabilities before import */
517 if (getenv_f(name
, (char *)(gd
->env_buf
), sizeof(gd
->env_buf
)) > 0)
518 return (char *)(gd
->env_buf
);
524 * Look up variable from environment for restricted C runtime env.
526 int getenv_f(const char *name
, char *buf
, unsigned len
)
530 for (i
= 0; env_get_char(i
) != '\0'; i
= nxt
+ 1) {
533 for (nxt
= i
; env_get_char(nxt
) != '\0'; ++nxt
) {
534 if (nxt
>= CONFIG_ENV_SIZE
)
538 val
= envmatch((uchar
*)name
, i
);
542 /* found; copy out */
543 for (n
= 0; n
< len
; ++n
, ++buf
) {
544 *buf
= env_get_char(val
++);
552 printf("env_buf [%d bytes] too small for value of \"%s\"\n",
562 * Decode the integer value of an environment variable and return it.
564 * @param name Name of environemnt variable
565 * @param base Number base to use (normally 10, or 16 for hex)
566 * @param default_val Default value to return if the variable is not
568 * @return the decoded value, or default_val if not found
570 ulong
getenv_ulong(const char *name
, int base
, ulong default_val
)
573 * We can use getenv() here, even before relocation, since the
574 * environment variable value is an integer and thus short.
576 const char *str
= getenv(name
);
578 return str
? simple_strtoul(str
, NULL
, base
) : default_val
;
581 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
582 int do_env_save(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
584 printf("Saving Environment to %s...\n", env_name_spec
);
586 return saveenv() ? 1 : 0;
590 saveenv
, 1, 0, do_env_save
,
591 "save environment variables to persistent storage",
598 * Match a name / name=value pair
600 * s1 is either a simple 'name', or a 'name=value' pair.
601 * i2 is the environment index for a 'name2=value2' pair.
602 * If the names match, return the index for the value2, else -1.
604 int envmatch(uchar
*s1
, int i2
)
606 while (*s1
== env_get_char(i2
++))
610 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
616 static int do_env_default(cmd_tbl_t
*cmdtp
, int flag
,
617 int argc
, char * const argv
[])
619 if (argc
!= 2 || strcmp(argv
[1], "-f") != 0)
620 return CMD_RET_USAGE
;
622 set_default_env("## Resetting to default environment\n");
626 static int do_env_delete(cmd_tbl_t
*cmdtp
, int flag
,
627 int argc
, char * const argv
[])
629 printf("Not implemented yet\n");
633 #ifdef CONFIG_CMD_EXPORTENV
635 * env export [-t | -b | -c] [-s size] addr [var ...]
636 * -t: export as text format; if size is given, data will be
637 * padded with '\0' bytes; if not, one terminating '\0'
638 * will be added (which is included in the "filesize"
639 * setting so you can for exmple copy this to flash and
640 * keep the termination).
641 * -b: export as binary format (name=value pairs separated by
642 * '\0', list end marked by double "\0\0")
643 * -c: export as checksum protected environment format as
644 * used for example by "saveenv" command
646 * size of output buffer
647 * addr: memory address where environment gets stored
648 * var... List of variable names that get included into the
649 * export. Without arguments, the whole environment gets
652 * With "-c" and size is NOT given, then the export command will
653 * format the data as currently used for the persistent storage,
654 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
655 * prepend a valid CRC32 checksum and, in case of resundant
656 * environment, a "current" redundancy flag. If size is given, this
657 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
658 * checksum and redundancy flag will be inserted.
660 * With "-b" and "-t", always only the real data (including a
661 * terminating '\0' byte) will be written; here the optional size
662 * argument will be used to make sure not to overflow the user
663 * provided buffer; the command will abort if the size is not
664 * sufficient. Any remainign space will be '\0' padded.
666 * On successful return, the variable "filesize" will be set.
667 * Note that filesize includes the trailing/terminating '\0' byte(s).
669 * Usage szenario: create a text snapshot/backup of the current settings:
671 * => env export -t 100000
672 * => era ${backup_addr} +${filesize}
673 * => cp.b 100000 ${backup_addr} ${filesize}
675 * Re-import this snapshot, deleting all other settings:
677 * => env import -d -t ${backup_addr}
679 static int do_env_export(cmd_tbl_t
*cmdtp
, int flag
,
680 int argc
, char * const argv
[])
683 char *addr
, *cmd
, *res
;
693 while (--argc
> 0 && **++argv
== '-') {
697 case 'b': /* raw binary format */
702 case 'c': /* external checksum format */
708 case 's': /* size given */
710 return cmd_usage(cmdtp
);
711 size
= simple_strtoul(*++argv
, NULL
, 16);
713 case 't': /* text format */
719 return CMD_RET_USAGE
;
726 return CMD_RET_USAGE
;
728 addr
= (char *)simple_strtoul(argv
[0], NULL
, 16);
731 memset(addr
, '\0', size
);
736 if (sep
) { /* export as text file */
737 len
= hexport_r(&env_htab
, sep
, &addr
, size
, argc
, argv
);
739 error("Cannot export environment: errno = %d\n", errno
);
742 sprintf(buf
, "%zX", (size_t)len
);
743 setenv("filesize", buf
);
748 envp
= (env_t
*)addr
;
750 if (chk
) /* export as checksum protected block */
751 res
= (char *)envp
->data
;
752 else /* export as raw binary data */
755 len
= hexport_r(&env_htab
, '\0', &res
, ENV_SIZE
, argc
, argv
);
757 error("Cannot export environment: errno = %d\n", errno
);
762 envp
->crc
= crc32(0, envp
->data
, ENV_SIZE
);
763 #ifdef CONFIG_ENV_ADDR_REDUND
764 envp
->flags
= ACTIVE_FLAG
;
767 sprintf(buf
, "%zX", (size_t)(len
+ offsetof(env_t
, data
)));
768 setenv("filesize", buf
);
773 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd
);
778 #ifdef CONFIG_CMD_IMPORTENV
780 * env import [-d] [-t | -b | -c] addr [size]
781 * -d: delete existing environment before importing;
782 * otherwise overwrite / append to existion definitions
783 * -t: assume text format; either "size" must be given or the
784 * text data must be '\0' terminated
785 * -b: assume binary format ('\0' separated, "\0\0" terminated)
786 * -c: assume checksum protected environment format
787 * addr: memory address to read from
788 * size: length of input data; if missing, proper '\0'
789 * termination is mandatory
791 static int do_env_import(cmd_tbl_t
*cmdtp
, int flag
,
792 int argc
, char * const argv
[])
803 while (--argc
> 0 && **++argv
== '-') {
807 case 'b': /* raw binary format */
812 case 'c': /* external checksum format */
818 case 't': /* text format */
827 return CMD_RET_USAGE
;
833 return CMD_RET_USAGE
;
836 printf("## Warning: defaulting to text format\n");
838 addr
= (char *)simple_strtoul(argv
[0], NULL
, 16);
841 size
= simple_strtoul(argv
[1], NULL
, 16);
847 while (size
< MAX_ENV_SIZE
) {
848 if ((*s
== sep
) && (*(s
+1) == '\0'))
853 if (size
== MAX_ENV_SIZE
) {
854 printf("## Warning: Input data exceeds %d bytes"
855 " - truncated\n", MAX_ENV_SIZE
);
858 printf("## Info: input data size = %zu = 0x%zX\n", size
, size
);
863 env_t
*ep
= (env_t
*)addr
;
865 size
-= offsetof(env_t
, data
);
866 memcpy(&crc
, &ep
->crc
, sizeof(crc
));
868 if (crc32(0, ep
->data
, size
) != crc
) {
869 puts("## Error: bad CRC, import failed\n");
872 addr
= (char *)ep
->data
;
875 if (himport_r(&env_htab
, addr
, size
, sep
, del
? 0 : H_NOCLEAR
) == 0) {
876 error("Environment import failed: errno = %d\n", errno
);
879 gd
->flags
|= GD_FLG_ENV_READY
;
884 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
891 * New command line interface: "env" command with subcommands
893 static cmd_tbl_t cmd_env_sub
[] = {
894 #if defined(CONFIG_CMD_ASKENV)
895 U_BOOT_CMD_MKENT(ask
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
, "", ""),
897 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default
, "", ""),
898 U_BOOT_CMD_MKENT(delete, 2, 0, do_env_delete
, "", ""),
899 #if defined(CONFIG_CMD_EDITENV)
900 U_BOOT_CMD_MKENT(edit
, 2, 0, do_env_edit
, "", ""),
902 #if defined(CONFIG_CMD_EXPORTENV)
903 U_BOOT_CMD_MKENT(export
, 4, 0, do_env_export
, "", ""),
905 #if defined(CONFIG_CMD_GREPENV)
906 U_BOOT_CMD_MKENT(grep
, CONFIG_SYS_MAXARGS
, 1, do_env_grep
, "", ""),
908 #if defined(CONFIG_CMD_IMPORTENV)
909 U_BOOT_CMD_MKENT(import
, 5, 0, do_env_import
, "", ""),
911 U_BOOT_CMD_MKENT(print
, CONFIG_SYS_MAXARGS
, 1, do_env_print
, "", ""),
912 #if defined(CONFIG_CMD_RUN)
913 U_BOOT_CMD_MKENT(run
, CONFIG_SYS_MAXARGS
, 1, do_run
, "", ""),
915 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
916 U_BOOT_CMD_MKENT(save
, 1, 0, do_env_save
, "", ""),
918 U_BOOT_CMD_MKENT(set
, CONFIG_SYS_MAXARGS
, 0, do_env_set
, "", ""),
921 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
924 fixup_cmdtable(cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
928 static int do_env(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
933 return CMD_RET_USAGE
;
935 /* drop initial "env" arg */
939 cp
= find_cmd_tbl(argv
[0], cmd_env_sub
, ARRAY_SIZE(cmd_env_sub
));
942 return cp
->cmd(cmdtp
, flag
, argc
, argv
);
944 return CMD_RET_USAGE
;
948 env
, CONFIG_SYS_MAXARGS
, 1, do_env
,
949 "environment handling commands",
950 #if defined(CONFIG_CMD_ASKENV)
951 "ask name [message] [size] - ask for environment variable\nenv "
953 "default -f - reset default environment\n"
954 #if defined(CONFIG_CMD_EDITENV)
955 "env edit name - edit environment variable\n"
957 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
958 #if defined(CONFIG_CMD_GREPENV)
959 "env grep string [...] - search environment\n"
961 "env import [-d] [-t | -b | -c] addr [size] - import environment\n"
962 "env print [name ...] - print environment\n"
963 #if defined(CONFIG_CMD_RUN)
964 "env run var [...] - run commands in an environment variable\n"
966 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
967 "env save - save environment\n"
969 "env set [-f] name [arg ...]\n"
973 * Old command line interface, kept for compatibility
976 #if defined(CONFIG_CMD_EDITENV)
978 editenv
, 2, 0, do_env_edit
,
979 "edit environment variable",
981 " - edit environment variable 'name'",
987 printenv
, CONFIG_SYS_MAXARGS
, 1, do_env_print
,
988 "print environment variables",
989 "\n - print values of all environment variables\n"
990 "printenv name ...\n"
991 " - print value of environment variable 'name'",
995 #ifdef CONFIG_CMD_GREPENV
997 grepenv
, CONFIG_SYS_MAXARGS
, 0, do_env_grep
,
998 "search environment variables",
1000 " - list environment name=value pairs matching 'string'",
1005 U_BOOT_CMD_COMPLETE(
1006 setenv
, CONFIG_SYS_MAXARGS
, 0, do_env_set
,
1007 "set environment variables",
1009 " - set environment variable 'name' to 'value ...'\n"
1011 " - delete environment variable 'name'",
1015 #if defined(CONFIG_CMD_ASKENV)
1018 askenv
, CONFIG_SYS_MAXARGS
, 1, do_env_ask
,
1019 "get environment variables from stdin",
1020 "name [message] [size]\n"
1021 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1023 " - get environment variable 'name' from stdin\n"
1024 "askenv name size\n"
1025 " - get environment variable 'name' from stdin (max 'size' chars)\n"
1026 "askenv name [message] size\n"
1027 " - display 'message' string and get environment variable 'name'"
1028 "from stdin (max 'size' chars)"
1032 #if defined(CONFIG_CMD_RUN)
1033 U_BOOT_CMD_COMPLETE(
1034 run
, CONFIG_SYS_MAXARGS
, 1, do_run
,
1035 "run commands in an environment variable",
1037 " - run the commands in the environment variable(s) 'var'",