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git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_nvedit.c
2 * (C) Copyright 2000-2002
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 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 /**************************************************************************
29 * Support for persistent environment data
31 * The "environment" is stored as a list of '\0' terminated
32 * "name=value" strings. The end of the list is marked by a double
33 * '\0'. New entries are always added at the end. Deleting an entry
34 * shifts the remaining entries to the front. Replacing an entry is a
35 * combination of deleting the old value and adding the new one.
37 * The environment is preceeded by a 32 bit CRC over the data part.
39 **************************************************************************
44 #include <environment.h>
47 #include <linux/stddef.h>
48 #include <asm/byteorder.h>
49 #if defined(CONFIG_CMD_NET)
53 DECLARE_GLOBAL_DATA_PTR
;
55 #if !defined(CFG_ENV_IS_IN_NVRAM) && \
56 !defined(CFG_ENV_IS_IN_EEPROM) && \
57 !defined(CFG_ENV_IS_IN_FLASH) && \
58 !defined(CFG_ENV_IS_IN_DATAFLASH) && \
59 !defined(CFG_ENV_IS_IN_NAND) && \
60 !defined(CFG_ENV_IS_IN_ONENAND) && \
61 !defined(CFG_ENV_IS_NOWHERE)
62 # error Define one of CFG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|NOWHERE}
66 #define MK_STR(x) XMK_STR(x)
68 /************************************************************************
69 ************************************************************************/
71 /* Function that returns a character from the environment */
72 extern uchar (*env_get_char
)(int);
74 /* Function that returns a pointer to a value from the environment */
75 /* (Only memory version supported / needed). */
76 extern uchar
*env_get_addr(int);
78 /* Function that updates CRC of the enironment */
79 extern void env_crc_update (void);
81 /************************************************************************
82 ************************************************************************/
85 * Table with supported baudrates (defined in config_xyz.h)
87 static const unsigned long baudrate_table
[] = CFG_BAUDRATE_TABLE
;
88 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
91 /************************************************************************
92 * Command interface: print one or all environment variables
95 int do_printenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
100 if (argc
== 1) { /* Print all env variables */
101 for (i
=0; env_get_char(i
) != '\0'; i
=nxt
+1) {
102 for (nxt
=i
; env_get_char(nxt
) != '\0'; ++nxt
)
104 for (k
=i
; k
<nxt
; ++k
)
105 putc(env_get_char(k
));
109 puts ("\n ** Abort\n");
114 printf("\nEnvironment size: %d/%d bytes\n", i
, ENV_SIZE
);
119 for (i
=1; i
<argc
; ++i
) { /* print single env variables */
120 char *name
= argv
[i
];
124 for (j
=0; env_get_char(j
) != '\0'; j
=nxt
+1) {
126 for (nxt
=j
; env_get_char(nxt
) != '\0'; ++nxt
)
128 k
= envmatch((uchar
*)name
, j
);
135 putc(env_get_char(k
++));
140 printf ("## Error: \"%s\" not defined\n", name
);
147 /************************************************************************
148 * Set a new environment variable,
149 * or replace or delete an existing one.
151 * This function will ONLY work with a in-RAM copy of the environment
154 int _do_setenv (int flag
, int argc
, char *argv
[])
158 uchar
*env
, *nxt
= NULL
;
162 uchar
*env_data
= env_get_addr(0);
164 if (!env_data
) /* need copy in RAM */
169 if (strchr(name
, '=')) {
170 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name
);
175 * search if variable with this name already exists
178 for (env
=env_data
; *env
; env
=nxt
+1) {
179 for (nxt
=env
; *nxt
; ++nxt
)
181 if ((oldval
= envmatch((uchar
*)name
, env
-env_data
)) >= 0)
186 * Delete any existing definition
189 #ifndef CONFIG_ENV_OVERWRITE
192 * Ethernet Address and serial# can be set only once,
195 #ifdef CONFIG_HAS_UID
196 /* Allow serial# forced overwrite with 0xdeaf4add flag */
197 if ( ((strcmp (name
, "serial#") == 0) && (flag
!= 0xdeaf4add)) ||
199 if ( (strcmp (name
, "serial#") == 0) ||
201 ((strcmp (name
, "ethaddr") == 0)
202 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
203 && (strcmp ((char *)env_get_addr(oldval
),MK_STR(CONFIG_ETHADDR
)) != 0)
204 #endif /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
206 printf ("Can't overwrite \"%s\"\n", name
);
211 /* Check for console redirection */
212 if (strcmp(name
,"stdin") == 0) {
214 } else if (strcmp(name
,"stdout") == 0) {
216 } else if (strcmp(name
,"stderr") == 0) {
221 if (argc
< 3) { /* Cannot delete it! */
222 printf("Can't delete \"%s\"\n", name
);
226 /* Try assigning specified device */
227 if (console_assign (console
, argv
[2]) < 0)
230 #ifdef CONFIG_SERIAL_MULTI
231 if (serial_assign (argv
[2]) < 0)
237 * Switch to new baudrate if new baudrate is supported
239 if (strcmp(argv
[1],"baudrate") == 0) {
240 int baudrate
= simple_strtoul(argv
[2], NULL
, 10);
242 for (i
=0; i
<N_BAUDRATES
; ++i
) {
243 if (baudrate
== baudrate_table
[i
])
246 if (i
== N_BAUDRATES
) {
247 printf ("## Baudrate %d bps not supported\n",
251 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
254 gd
->baudrate
= baudrate
;
255 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
256 gd
->bd
->bi_baudrate
= baudrate
;
267 if (*++nxt
== '\0') {
268 if (env
> env_data
) {
276 if ((*env
== '\0') && (*nxt
== '\0'))
284 #ifdef CONFIG_NET_MULTI
285 if (strncmp(name
, "eth", 3) == 0) {
287 int num
= simple_strtoul(name
+3, &end
, 10);
289 if (strcmp(end
, "addr") == 0) {
290 eth_set_enetaddr(num
, argv
[2]);
297 if ((argc
< 3) || argv
[2] == NULL
) {
303 * Append new definition at the end
305 for (env
=env_data
; *env
|| *(env
+1); ++env
)
311 * "name" + "=" + "val" +"\0\0" > ENV_SIZE - (env-env_data)
313 len
= strlen(name
) + 2;
314 /* add '=' for first arg, ' ' for all others */
315 for (i
=2; i
<argc
; ++i
) {
316 len
+= strlen(argv
[i
]) + 1;
318 if (len
> (&env_data
[ENV_SIZE
]-env
)) {
319 printf ("## Error: environment overflow, \"%s\" deleted\n", name
);
322 while ((*env
= *name
++) != '\0')
324 for (i
=2; i
<argc
; ++i
) {
327 *env
= (i
==2) ? '=' : ' ';
328 while ((*++env
= *val
++) != '\0')
332 /* end is marked with double '\0' */
339 * Some variables should be updated when the corresponding
340 * entry in the enviornment is changed
343 if (strcmp(argv
[1],"ethaddr") == 0) {
344 char *s
= argv
[2]; /* always use only one arg */
346 for (i
=0; i
<6; ++i
) {
347 bd
->bi_enetaddr
[i
] = s
? simple_strtoul(s
, &e
, 16) : 0;
348 if (s
) s
= (*e
) ? e
+1 : e
;
350 #ifdef CONFIG_NET_MULTI
351 eth_set_enetaddr(0, argv
[2]);
356 if (strcmp(argv
[1],"ipaddr") == 0) {
357 char *s
= argv
[2]; /* always use only one arg */
361 for (addr
=0, i
=0; i
<4; ++i
) {
362 ulong val
= s
? simple_strtoul(s
, &e
, 10) : 0;
364 addr
|= (val
& 0xFF);
365 if (s
) s
= (*e
) ? e
+1 : e
;
367 bd
->bi_ip_addr
= htonl(addr
);
370 if (strcmp(argv
[1],"loadaddr") == 0) {
371 load_addr
= simple_strtoul(argv
[2], NULL
, 16);
374 #if defined(CONFIG_CMD_NET)
375 if (strcmp(argv
[1],"bootfile") == 0) {
376 copy_filename (BootFile
, argv
[2], sizeof(BootFile
));
381 #ifdef CONFIG_AMIGAONEG3SE
382 if (strcmp(argv
[1], "vga_fg_color") == 0 ||
383 strcmp(argv
[1], "vga_bg_color") == 0 ) {
384 extern void video_set_color(unsigned char attr
);
385 extern unsigned char video_get_attr(void);
387 video_set_color(video_get_attr());
390 #endif /* CONFIG_AMIGAONEG3SE */
395 void setenv (char *varname
, char *varvalue
)
397 char *argv
[4] = { "setenv", varname
, varvalue
, NULL
};
398 if (varvalue
== NULL
)
399 _do_setenv (0, 2, argv
);
401 _do_setenv (0, 3, argv
);
404 #ifdef CONFIG_HAS_UID
405 void forceenv (char *varname
, char *varvalue
)
407 char *argv
[4] = { "forceenv", varname
, varvalue
, NULL
};
408 _do_setenv (0xdeaf4add, 3, argv
);
412 int do_setenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
415 printf ("Usage:\n%s\n", cmdtp
->usage
);
419 return _do_setenv (flag
, argc
, argv
);
422 /************************************************************************
423 * Prompt for environment variable
426 #if defined(CONFIG_CMD_ASKENV)
427 int do_askenv ( cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
429 extern char console_buffer
[CFG_CBSIZE
];
430 char message
[CFG_CBSIZE
];
431 int size
= CFG_CBSIZE
- 1;
435 local_args
[0] = argv
[0];
436 local_args
[1] = argv
[1];
437 local_args
[2] = NULL
;
438 local_args
[3] = NULL
;
441 printf ("Usage:\n%s\n", cmdtp
->usage
);
444 /* Check the syntax */
447 printf ("Usage:\n%s\n", cmdtp
->usage
);
450 case 2: /* askenv envname */
451 sprintf (message
, "Please enter '%s':", argv
[1]);
454 case 3: /* askenv envname size */
455 sprintf (message
, "Please enter '%s':", argv
[1]);
456 size
= simple_strtoul (argv
[2], NULL
, 10);
459 default: /* askenv envname message1 ... messagen size */
464 for (i
= 2; i
< argc
- 1; i
++) {
466 message
[pos
++] = ' ';
468 strcpy (message
+pos
, argv
[i
]);
469 pos
+= strlen(argv
[i
]);
472 size
= simple_strtoul (argv
[argc
- 1], NULL
, 10);
477 if (size
>= CFG_CBSIZE
)
478 size
= CFG_CBSIZE
- 1;
483 /* prompt for input */
484 len
= readline (message
);
487 console_buffer
[size
] = '\0';
490 if (console_buffer
[0] != '\0') {
491 local_args
[2] = console_buffer
;
495 /* Continue calling setenv code */
496 return _do_setenv (flag
, len
, local_args
);
500 /************************************************************************
501 * Look up variable from environment,
502 * return address of storage for that variable,
503 * or NULL if not found
506 char *getenv (char *name
)
512 for (i
=0; env_get_char(i
) != '\0'; i
=nxt
+1) {
515 for (nxt
=i
; env_get_char(nxt
) != '\0'; ++nxt
) {
516 if (nxt
>= CFG_ENV_SIZE
) {
520 if ((val
=envmatch((uchar
*)name
, i
)) < 0)
522 return ((char *)env_get_addr(val
));
528 int getenv_r (char *name
, char *buf
, unsigned len
)
532 for (i
=0; env_get_char(i
) != '\0'; i
=nxt
+1) {
535 for (nxt
=i
; env_get_char(nxt
) != '\0'; ++nxt
) {
536 if (nxt
>= CFG_ENV_SIZE
) {
540 if ((val
=envmatch((uchar
*)name
, i
)) < 0)
542 /* found; copy out */
544 while ((len
> n
++) && (*buf
++ = env_get_char(val
++)) != '\0')
553 #if ((defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
554 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
555 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
556 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))) \
557 && !defined(CFG_ENV_IS_NOWHERE))
558 int do_saveenv (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
560 extern char * env_name_spec
;
562 printf ("Saving Environment to %s...\n", env_name_spec
);
564 return (saveenv() ? 1 : 0);
570 /************************************************************************
571 * Match a name / name=value pair
573 * s1 is either a simple 'name', or a 'name=value' pair.
574 * i2 is the environment index for a 'name2=value2' pair.
575 * If the names match, return the index for the value2, else NULL.
578 int envmatch (uchar
*s1
, int i2
)
581 while (*s1
== env_get_char(i2
++))
584 if (*s1
== '\0' && env_get_char(i2
-1) == '=')
590 /**************************************************/
593 printenv
, CFG_MAXARGS
, 1, do_printenv
,
594 "printenv- print environment variables\n",
595 "\n - print values of all environment variables\n"
596 "printenv name ...\n"
597 " - print value of environment variable 'name'\n"
601 setenv
, CFG_MAXARGS
, 0, do_setenv
,
602 "setenv - set environment variables\n",
604 " - set environment variable 'name' to 'value ...'\n"
606 " - delete environment variable 'name'\n"
609 #if ((defined(CFG_ENV_IS_IN_NVRAM) || defined(CFG_ENV_IS_IN_EEPROM) \
610 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH)) \
611 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_NAND)) \
612 || (defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_ONENAND))) \
613 && !defined(CFG_ENV_IS_NOWHERE))
615 saveenv
, 1, 0, do_saveenv
,
616 "saveenv - save environment variables to persistent storage\n",
622 #if defined(CONFIG_CMD_ASKENV)
625 askenv
, CFG_MAXARGS
, 1, do_askenv
,
626 "askenv - get environment variables from stdin\n",
627 "name [message] [size]\n"
628 " - get environment variable 'name' from stdin (max 'size' chars)\n"
630 " - get environment variable 'name' from stdin\n"
632 " - get environment variable 'name' from stdin (max 'size' chars)\n"
633 "askenv name [message] size\n"
634 " - display 'message' string and get environment variable 'name'"
635 "from stdin (max 'size' chars)\n"
639 #if defined(CONFIG_CMD_RUN)
640 int do_run (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[]);
642 run
, CFG_MAXARGS
, 1, do_run
,
643 "run - run commands in an environment variable\n",
645 " - run the commands in the environment variable(s) 'var'\n"