1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2000-2013
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Andreas Heppel <aheppel@sysgo.de>
8 *
9 * Copyright 2011 Freescale Semiconductor, Inc.
10 */
11
12 /*
13 * Support for persistent environment data
14 *
15 * The "environment" is stored on external storage as a list of '\0'
16 * terminated "name=value" strings. The end of the list is marked by
17 * a double '\0'. The environment is preceded by a 32 bit CRC over
18 * the data part and, in case of redundant environment, a byte of
19 * flags.
20 *
21 * This linearized representation will also be used before
22 * relocation, i. e. as long as we don't have a full C runtime
23 * environment. After that, we use a hash table.
24 */
25
26 #include <common.h>
27 #include <cli.h>
28 #include <command.h>
29 #include <console.h>
30 #include <env.h>
31 #include <env_internal.h>
32 #include <search.h>
33 #include <errno.h>
34 #include <malloc.h>
35 #include <mapmem.h>
36 #include <u-boot/crc.h>
37 #include <watchdog.h>
38 #include <linux/stddef.h>
39 #include <asm/byteorder.h>
40 #include <asm/io.h>
41
42 DECLARE_GLOBAL_DATA_PTR;
43
44 #if defined(CONFIG_ENV_IS_IN_EEPROM) || \
45 defined(CONFIG_ENV_IS_IN_FLASH) || \
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_UFS) || \
56 defined(CONFIG_ENV_IS_IN_UBI)
57
58 #define ENV_IS_IN_DEVICE
59
60 #endif
61
62 #if !defined(ENV_IS_IN_DEVICE) && \
63 !defined(CONFIG_ENV_IS_NOWHERE)
64 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
65 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI|UFS} or CONFIG_ENV_IS_NOWHERE
66 #endif
67
68 /*
69 * Maximum expected input data size for import command
70 */
71 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */
72
73 /*
74 * This variable is incremented on each do_env_set(), so it can
75 * be used via env_get_id() as an indication, if the environment
76 * has changed or not. So it is possible to reread an environment
77 * variable only if the environment was changed ... done so for
78 * example in NetInitLoop()
79 */
80 static int env_id = 1;
81
env_get_id(void)82 int env_get_id(void)
83 {
84 return env_id;
85 }
86
87 #ifndef CONFIG_SPL_BUILD
88 /*
89 * Command interface: print one or all environment variables
90 *
91 * Returns 0 in case of error, or length of printed string
92 */
env_print(char * name,int flag)93 static int env_print(char *name, int flag)
94 {
95 char *res = NULL;
96 ssize_t len;
97
98 if (name) { /* print a single name */
99 struct env_entry e, *ep;
100
101 e.key = name;
102 e.data = NULL;
103 hsearch_r(e, ENV_FIND, &ep, &env_htab, flag);
104 if (ep == NULL)
105 return 0;
106 len = printf("%s=%s\n", ep->key, ep->data);
107 return len;
108 }
109
110 /* print whole list */
111 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
112
113 if (len > 0) {
114 puts(res);
115 free(res);
116 return len;
117 }
118
119 /* should never happen */
120 printf("## Error: cannot export environment\n");
121 return 0;
122 }
123
do_env_print(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])124 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
125 char * const argv[])
126 {
127 int i;
128 int rcode = 0;
129 int env_flag = H_HIDE_DOT;
130
131 #if defined(CONFIG_CMD_NVEDIT_EFI)
132 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
133 return do_env_print_efi(cmdtp, flag, --argc, ++argv);
134 #endif
135
136 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
137 argc--;
138 argv++;
139 env_flag &= ~H_HIDE_DOT;
140 }
141
142 if (argc == 1) {
143 /* print all env vars */
144 rcode = env_print(NULL, env_flag);
145 if (!rcode)
146 return 1;
147 printf("\nEnvironment size: %d/%ld bytes\n",
148 rcode, (ulong)ENV_SIZE);
149 return 0;
150 }
151
152 /* print selected env vars */
153 env_flag &= ~H_HIDE_DOT;
154 for (i = 1; i < argc; ++i) {
155 int rc = env_print(argv[i], env_flag);
156 if (!rc) {
157 printf("## Error: \"%s\" not defined\n", argv[i]);
158 ++rcode;
159 }
160 }
161
162 return rcode;
163 }
164
165 #ifdef CONFIG_CMD_GREPENV
do_env_grep(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])166 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
167 int argc, char * const argv[])
168 {
169 char *res = NULL;
170 int len, grep_how, grep_what;
171
172 if (argc < 2)
173 return CMD_RET_USAGE;
174
175 grep_how = H_MATCH_SUBSTR; /* default: substring search */
176 grep_what = H_MATCH_BOTH; /* default: grep names and values */
177
178 while (--argc > 0 && **++argv == '-') {
179 char *arg = *argv;
180 while (*++arg) {
181 switch (*arg) {
182 #ifdef CONFIG_REGEX
183 case 'e': /* use regex matching */
184 grep_how = H_MATCH_REGEX;
185 break;
186 #endif
187 case 'n': /* grep for name */
188 grep_what = H_MATCH_KEY;
189 break;
190 case 'v': /* grep for value */
191 grep_what = H_MATCH_DATA;
192 break;
193 case 'b': /* grep for both */
194 grep_what = H_MATCH_BOTH;
195 break;
196 case '-':
197 goto DONE;
198 default:
199 return CMD_RET_USAGE;
200 }
201 }
202 }
203
204 DONE:
205 len = hexport_r(&env_htab, '\n',
206 flag | grep_what | grep_how,
207 &res, 0, argc, argv);
208
209 if (len > 0) {
210 puts(res);
211 free(res);
212 }
213
214 if (len < 2)
215 return 1;
216
217 return 0;
218 }
219 #endif
220 #endif /* CONFIG_SPL_BUILD */
221
222 /*
223 * Set a new environment variable,
224 * or replace or delete an existing one.
225 */
_do_env_set(int flag,int argc,char * const argv[],int env_flag)226 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
227 {
228 int i, len;
229 char *name, *value, *s;
230 struct env_entry e, *ep;
231
232 debug("Initial value for argc=%d\n", argc);
233
234 #if CONFIG_IS_ENABLED(CMD_NVEDIT_EFI)
235 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
236 return do_env_set_efi(NULL, flag, --argc, ++argv);
237 #endif
238
239 while (argc > 1 && **(argv + 1) == '-') {
240 char *arg = *++argv;
241
242 --argc;
243 while (*++arg) {
244 switch (*arg) {
245 case 'f': /* force */
246 env_flag |= H_FORCE;
247 break;
248 default:
249 return CMD_RET_USAGE;
250 }
251 }
252 }
253 debug("Final value for argc=%d\n", argc);
254 name = argv[1];
255
256 if (strchr(name, '=')) {
257 printf("## Error: illegal character '='"
258 "in variable name \"%s\"\n", name);
259 return 1;
260 }
261
262 env_id++;
263
264 /* Delete only ? */
265 if (argc < 3 || argv[2] == NULL) {
266 int rc = hdelete_r(name, &env_htab, env_flag);
267 return !rc;
268 }
269
270 /*
271 * Insert / replace new value
272 */
273 for (i = 2, len = 0; i < argc; ++i)
274 len += strlen(argv[i]) + 1;
275
276 value = malloc(len);
277 if (value == NULL) {
278 printf("## Can't malloc %d bytes\n", len);
279 return 1;
280 }
281 for (i = 2, s = value; i < argc; ++i) {
282 char *v = argv[i];
283
284 while ((*s++ = *v++) != '\0')
285 ;
286 *(s - 1) = ' ';
287 }
288 if (s != value)
289 *--s = '\0';
290
291 e.key = name;
292 e.data = value;
293 hsearch_r(e, ENV_ENTER, &ep, &env_htab, env_flag);
294 free(value);
295 if (!ep) {
296 printf("## Error inserting \"%s\" variable, errno=%d\n",
297 name, errno);
298 return 1;
299 }
300
301 return 0;
302 }
303
env_set(const char * varname,const char * varvalue)304 int env_set(const char *varname, const char *varvalue)
305 {
306 const char * const argv[4] = { "setenv", varname, varvalue, NULL };
307
308 /* before import into hashtable */
309 if (!(gd->flags & GD_FLG_ENV_READY))
310 return 1;
311
312 if (varvalue == NULL || varvalue[0] == '\0')
313 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
314 else
315 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
316 }
317
318 /**
319 * Set an environment variable to an integer value
320 *
321 * @param varname Environment variable to set
322 * @param value Value to set it to
323 * @return 0 if ok, 1 on error
324 */
env_set_ulong(const char * varname,ulong value)325 int env_set_ulong(const char *varname, ulong value)
326 {
327 /* TODO: this should be unsigned */
328 char *str = simple_itoa(value);
329
330 return env_set(varname, str);
331 }
332
333 /**
334 * Set an environment variable to an value in hex
335 *
336 * @param varname Environment variable to set
337 * @param value Value to set it to
338 * @return 0 if ok, 1 on error
339 */
env_set_hex(const char * varname,ulong value)340 int env_set_hex(const char *varname, ulong value)
341 {
342 char str[17];
343
344 sprintf(str, "%lx", value);
345 return env_set(varname, str);
346 }
347
env_get_hex(const char * varname,ulong default_val)348 ulong env_get_hex(const char *varname, ulong default_val)
349 {
350 const char *s;
351 ulong value;
352 char *endp;
353
354 s = env_get(varname);
355 if (s)
356 value = simple_strtoul(s, &endp, 16);
357 if (!s || endp == s)
358 return default_val;
359
360 return value;
361 }
362
eth_env_get_enetaddr(const char * name,uint8_t * enetaddr)363 int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr)
364 {
365 string_to_enetaddr(env_get(name), enetaddr);
366 return is_valid_ethaddr(enetaddr);
367 }
368
eth_env_set_enetaddr(const char * name,const uint8_t * enetaddr)369 int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr)
370 {
371 char buf[ARP_HLEN_ASCII + 1];
372
373 if (eth_env_get_enetaddr(name, (uint8_t *)buf))
374 return -EEXIST;
375
376 sprintf(buf, "%pM", enetaddr);
377
378 return env_set(name, buf);
379 }
380
381 #ifndef CONFIG_SPL_BUILD
do_env_set(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])382 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
383 {
384 if (argc < 2)
385 return CMD_RET_USAGE;
386
387 return _do_env_set(flag, argc, argv, H_INTERACTIVE);
388 }
389
390 /*
391 * Prompt for environment variable
392 */
393 #if defined(CONFIG_CMD_ASKENV)
do_env_ask(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])394 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
395 {
396 char message[CONFIG_SYS_CBSIZE];
397 int i, len, pos, size;
398 char *local_args[4];
399 char *endptr;
400
401 local_args[0] = argv[0];
402 local_args[1] = argv[1];
403 local_args[2] = NULL;
404 local_args[3] = NULL;
405
406 /*
407 * Check the syntax:
408 *
409 * env_ask envname [message1 ...] [size]
410 */
411 if (argc == 1)
412 return CMD_RET_USAGE;
413
414 /*
415 * We test the last argument if it can be converted
416 * into a decimal number. If yes, we assume it's
417 * the size. Otherwise we echo it as part of the
418 * message.
419 */
420 i = simple_strtoul(argv[argc - 1], &endptr, 10);
421 if (*endptr != '\0') { /* no size */
422 size = CONFIG_SYS_CBSIZE - 1;
423 } else { /* size given */
424 size = i;
425 --argc;
426 }
427
428 if (argc <= 2) {
429 sprintf(message, "Please enter '%s': ", argv[1]);
430 } else {
431 /* env_ask envname message1 ... messagen [size] */
432 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
433 if (pos)
434 message[pos++] = ' ';
435
436 strncpy(message + pos, argv[i], sizeof(message) - pos);
437 pos += strlen(argv[i]);
438 }
439 if (pos < sizeof(message) - 1) {
440 message[pos++] = ' ';
441 message[pos] = '\0';
442 } else
443 message[CONFIG_SYS_CBSIZE - 1] = '\0';
444 }
445
446 if (size >= CONFIG_SYS_CBSIZE)
447 size = CONFIG_SYS_CBSIZE - 1;
448
449 if (size <= 0)
450 return 1;
451
452 /* prompt for input */
453 len = cli_readline(message);
454
455 if (size < len)
456 console_buffer[size] = '\0';
457
458 len = 2;
459 if (console_buffer[0] != '\0') {
460 local_args[2] = console_buffer;
461 len = 3;
462 }
463
464 /* Continue calling setenv code */
465 return _do_env_set(flag, len, local_args, H_INTERACTIVE);
466 }
467 #endif
468
469 #if defined(CONFIG_CMD_ENV_CALLBACK)
print_static_binding(const char * var_name,const char * callback_name,void * priv)470 static int print_static_binding(const char *var_name, const char *callback_name,
471 void *priv)
472 {
473 printf("\t%-20s %-20s\n", var_name, callback_name);
474
475 return 0;
476 }
477
print_active_callback(struct env_entry * entry)478 static int print_active_callback(struct env_entry *entry)
479 {
480 struct env_clbk_tbl *clbkp;
481 int i;
482 int num_callbacks;
483
484 if (entry->callback == NULL)
485 return 0;
486
487 /* look up the callback in the linker-list */
488 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
489 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
490 i < num_callbacks;
491 i++, clbkp++) {
492 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
493 if (entry->callback == clbkp->callback + gd->reloc_off)
494 #else
495 if (entry->callback == clbkp->callback)
496 #endif
497 break;
498 }
499
500 if (i == num_callbacks)
501 /* this should probably never happen, but just in case... */
502 printf("\t%-20s %p\n", entry->key, entry->callback);
503 else
504 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
505
506 return 0;
507 }
508
509 /*
510 * Print the callbacks available and what they are bound to
511 */
do_env_callback(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])512 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
513 {
514 struct env_clbk_tbl *clbkp;
515 int i;
516 int num_callbacks;
517
518 /* Print the available callbacks */
519 puts("Available callbacks:\n");
520 puts("\tCallback Name\n");
521 puts("\t-------------\n");
522 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
523 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
524 i < num_callbacks;
525 i++, clbkp++)
526 printf("\t%s\n", clbkp->name);
527 puts("\n");
528
529 /* Print the static bindings that may exist */
530 puts("Static callback bindings:\n");
531 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
532 printf("\t%-20s %-20s\n", "-------------", "-------------");
533 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
534 puts("\n");
535
536 /* walk through each variable and print the callback if it has one */
537 puts("Active callback bindings:\n");
538 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
539 printf("\t%-20s %-20s\n", "-------------", "-------------");
540 hwalk_r(&env_htab, print_active_callback);
541 return 0;
542 }
543 #endif
544
545 #if defined(CONFIG_CMD_ENV_FLAGS)
print_static_flags(const char * var_name,const char * flags,void * priv)546 static int print_static_flags(const char *var_name, const char *flags,
547 void *priv)
548 {
549 enum env_flags_vartype type = env_flags_parse_vartype(flags);
550 enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
551
552 printf("\t%-20s %-20s %-20s\n", var_name,
553 env_flags_get_vartype_name(type),
554 env_flags_get_varaccess_name(access));
555
556 return 0;
557 }
558
print_active_flags(struct env_entry * entry)559 static int print_active_flags(struct env_entry *entry)
560 {
561 enum env_flags_vartype type;
562 enum env_flags_varaccess access;
563
564 if (entry->flags == 0)
565 return 0;
566
567 type = (enum env_flags_vartype)
568 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
569 access = env_flags_parse_varaccess_from_binflags(entry->flags);
570 printf("\t%-20s %-20s %-20s\n", entry->key,
571 env_flags_get_vartype_name(type),
572 env_flags_get_varaccess_name(access));
573
574 return 0;
575 }
576
577 /*
578 * Print the flags available and what variables have flags
579 */
do_env_flags(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])580 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
581 {
582 /* Print the available variable types */
583 printf("Available variable type flags (position %d):\n",
584 ENV_FLAGS_VARTYPE_LOC);
585 puts("\tFlag\tVariable Type Name\n");
586 puts("\t----\t------------------\n");
587 env_flags_print_vartypes();
588 puts("\n");
589
590 /* Print the available variable access types */
591 printf("Available variable access flags (position %d):\n",
592 ENV_FLAGS_VARACCESS_LOC);
593 puts("\tFlag\tVariable Access Name\n");
594 puts("\t----\t--------------------\n");
595 env_flags_print_varaccess();
596 puts("\n");
597
598 /* Print the static flags that may exist */
599 puts("Static flags:\n");
600 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
601 "Variable Access");
602 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
603 "---------------");
604 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
605 puts("\n");
606
607 /* walk through each variable and print the flags if non-default */
608 puts("Active flags:\n");
609 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
610 "Variable Access");
611 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
612 "---------------");
613 hwalk_r(&env_htab, print_active_flags);
614 return 0;
615 }
616 #endif
617
618 /*
619 * Interactively edit an environment variable
620 */
621 #if defined(CONFIG_CMD_EDITENV)
do_env_edit(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])622 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
623 char * const argv[])
624 {
625 char buffer[CONFIG_SYS_CBSIZE];
626 char *init_val;
627
628 if (argc < 2)
629 return CMD_RET_USAGE;
630
631 /* before import into hashtable */
632 if (!(gd->flags & GD_FLG_ENV_READY))
633 return 1;
634
635 /* Set read buffer to initial value or empty sting */
636 init_val = env_get(argv[1]);
637 if (init_val)
638 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
639 else
640 buffer[0] = '\0';
641
642 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
643 return 1;
644
645 if (buffer[0] == '\0') {
646 const char * const _argv[3] = { "setenv", argv[1], NULL };
647
648 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
649 } else {
650 const char * const _argv[4] = { "setenv", argv[1], buffer,
651 NULL };
652
653 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
654 }
655 }
656 #endif /* CONFIG_CMD_EDITENV */
657 #endif /* CONFIG_SPL_BUILD */
658
659 /*
660 * Look up variable from environment,
661 * return address of storage for that variable,
662 * or NULL if not found
663 */
env_get(const char * name)664 char *env_get(const char *name)
665 {
666 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
667 struct env_entry e, *ep;
668
669 WATCHDOG_RESET();
670
671 e.key = name;
672 e.data = NULL;
673 hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
674
675 return ep ? ep->data : NULL;
676 }
677
678 /* restricted capabilities before import */
679 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
680 return (char *)(gd->env_buf);
681
682 return NULL;
683 }
684
685 /*
686 * Like env_get, but prints an error if envvar isn't defined in the
687 * environment. It always returns what env_get does, so it can be used in
688 * place of env_get without changing error handling otherwise.
689 */
from_env(const char * envvar)690 char *from_env(const char *envvar)
691 {
692 char *ret;
693
694 ret = env_get(envvar);
695
696 if (!ret)
697 printf("missing environment variable: %s\n", envvar);
698
699 return ret;
700 }
701
702 /*
703 * Look up variable from environment for restricted C runtime env.
704 */
env_get_f(const char * name,char * buf,unsigned len)705 int env_get_f(const char *name, char *buf, unsigned len)
706 {
707 int i, nxt, c;
708
709 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
710 int val, n;
711
712 for (nxt = i; (c = env_get_char(nxt)) != '\0'; ++nxt) {
713 if (c < 0)
714 return c;
715 if (nxt >= CONFIG_ENV_SIZE)
716 return -1;
717 }
718
719 val = env_match((uchar *)name, i);
720 if (val < 0)
721 continue;
722
723 /* found; copy out */
724 for (n = 0; n < len; ++n, ++buf) {
725 c = env_get_char(val++);
726 if (c < 0)
727 return c;
728 *buf = c;
729 if (*buf == '\0')
730 return n;
731 }
732
733 if (n)
734 *--buf = '\0';
735
736 printf("env_buf [%u bytes] too small for value of \"%s\"\n",
737 len, name);
738
739 return n;
740 }
741
742 return -1;
743 }
744
745 /**
746 * Decode the integer value of an environment variable and return it.
747 *
748 * @param name Name of environment variable
749 * @param base Number base to use (normally 10, or 16 for hex)
750 * @param default_val Default value to return if the variable is not
751 * found
752 * @return the decoded value, or default_val if not found
753 */
env_get_ulong(const char * name,int base,ulong default_val)754 ulong env_get_ulong(const char *name, int base, ulong default_val)
755 {
756 /*
757 * We can use env_get() here, even before relocation, since the
758 * environment variable value is an integer and thus short.
759 */
760 const char *str = env_get(name);
761
762 return str ? simple_strtoul(str, NULL, base) : default_val;
763 }
764
765 #ifndef CONFIG_SPL_BUILD
766 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
do_env_save(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])767 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
768 char * const argv[])
769 {
770 return env_save() ? 1 : 0;
771 }
772
773 U_BOOT_CMD(
774 saveenv, 1, 0, do_env_save,
775 "save environment variables to persistent storage",
776 ""
777 );
778
779 #if defined(CONFIG_CMD_ERASEENV)
do_env_erase(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])780 static int do_env_erase(cmd_tbl_t *cmdtp, int flag, int argc,
781 char * const argv[])
782 {
783 return env_erase() ? 1 : 0;
784 }
785
786 U_BOOT_CMD(
787 eraseenv, 1, 0, do_env_erase,
788 "erase environment variables from persistent storage",
789 ""
790 );
791 #endif
792 #endif
793 #endif /* CONFIG_SPL_BUILD */
794
env_match(uchar * s1,int i2)795 int env_match(uchar *s1, int i2)
796 {
797 if (s1 == NULL)
798 return -1;
799
800 while (*s1 == env_get_char(i2++))
801 if (*s1++ == '=')
802 return i2;
803
804 if (*s1 == '\0' && env_get_char(i2-1) == '=')
805 return i2;
806
807 return -1;
808 }
809
810 #ifndef CONFIG_SPL_BUILD
811 #ifndef CONFIG_MINI_BOOT
do_env_default(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])812 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
813 int argc, char * const argv[])
814 {
815 int all = 0, env_flag = H_INTERACTIVE;
816
817 debug("Initial value for argc=%d\n", argc);
818 while (--argc > 0 && **++argv == '-') {
819 char *arg = *argv;
820
821 while (*++arg) {
822 switch (*arg) {
823 case 'a': /* default all */
824 all = 1;
825 break;
826 case 'f': /* force */
827 env_flag |= H_FORCE;
828 break;
829 default:
830 return cmd_usage(cmdtp);
831 }
832 }
833 }
834 debug("Final value for argc=%d\n", argc);
835 if (all && (argc == 0)) {
836 /* Reset the whole environment */
837 env_set_default("## Resetting to default environment\n",
838 env_flag);
839 return 0;
840 }
841 if (!all && (argc > 0)) {
842 /* Reset individual variables */
843 env_set_default_vars(argc, argv, env_flag);
844 return 0;
845 }
846
847 return cmd_usage(cmdtp);
848 }
849
do_env_delete(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])850 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
851 int argc, char * const argv[])
852 {
853 int env_flag = H_INTERACTIVE;
854 int ret = 0;
855
856 debug("Initial value for argc=%d\n", argc);
857 while (argc > 1 && **(argv + 1) == '-') {
858 char *arg = *++argv;
859
860 --argc;
861 while (*++arg) {
862 switch (*arg) {
863 case 'f': /* force */
864 env_flag |= H_FORCE;
865 break;
866 default:
867 return CMD_RET_USAGE;
868 }
869 }
870 }
871 debug("Final value for argc=%d\n", argc);
872
873 env_id++;
874
875 while (--argc > 0) {
876 char *name = *++argv;
877
878 if (!hdelete_r(name, &env_htab, env_flag))
879 ret = 1;
880 }
881
882 return ret;
883 }
884 #endif /* CONFIG_MINI_BOOT */
885
886 #ifdef CONFIG_CMD_EXPORTENV
887 /*
888 * env export [-t | -b | -c] [-s size] addr [var ...]
889 * -t: export as text format; if size is given, data will be
890 * padded with '\0' bytes; if not, one terminating '\0'
891 * will be added (which is included in the "filesize"
892 * setting so you can for exmple copy this to flash and
893 * keep the termination).
894 * -b: export as binary format (name=value pairs separated by
895 * '\0', list end marked by double "\0\0")
896 * -c: export as checksum protected environment format as
897 * used for example by "saveenv" command
898 * -s size:
899 * size of output buffer
900 * addr: memory address where environment gets stored
901 * var... List of variable names that get included into the
902 * export. Without arguments, the whole environment gets
903 * exported.
904 *
905 * With "-c" and size is NOT given, then the export command will
906 * format the data as currently used for the persistent storage,
907 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
908 * prepend a valid CRC32 checksum and, in case of redundant
909 * environment, a "current" redundancy flag. If size is given, this
910 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
911 * checksum and redundancy flag will be inserted.
912 *
913 * With "-b" and "-t", always only the real data (including a
914 * terminating '\0' byte) will be written; here the optional size
915 * argument will be used to make sure not to overflow the user
916 * provided buffer; the command will abort if the size is not
917 * sufficient. Any remaining space will be '\0' padded.
918 *
919 * On successful return, the variable "filesize" will be set.
920 * Note that filesize includes the trailing/terminating '\0' byte(s).
921 *
922 * Usage scenario: create a text snapshot/backup of the current settings:
923 *
924 * => env export -t 100000
925 * => era ${backup_addr} +${filesize}
926 * => cp.b 100000 ${backup_addr} ${filesize}
927 *
928 * Re-import this snapshot, deleting all other settings:
929 *
930 * => env import -d -t ${backup_addr}
931 */
do_env_export(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])932 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
933 int argc, char * const argv[])
934 {
935 char buf[32];
936 ulong addr;
937 char *ptr, *cmd, *res;
938 size_t size = 0;
939 ssize_t len;
940 env_t *envp;
941 char sep = '\n';
942 int chk = 0;
943 int fmt = 0;
944
945 cmd = *argv;
946
947 while (--argc > 0 && **++argv == '-') {
948 char *arg = *argv;
949 while (*++arg) {
950 switch (*arg) {
951 case 'b': /* raw binary format */
952 if (fmt++)
953 goto sep_err;
954 sep = '\0';
955 break;
956 case 'c': /* external checksum format */
957 if (fmt++)
958 goto sep_err;
959 sep = '\0';
960 chk = 1;
961 break;
962 case 's': /* size given */
963 if (--argc <= 0)
964 return cmd_usage(cmdtp);
965 size = simple_strtoul(*++argv, NULL, 16);
966 goto NXTARG;
967 case 't': /* text format */
968 if (fmt++)
969 goto sep_err;
970 sep = '\n';
971 break;
972 default:
973 return CMD_RET_USAGE;
974 }
975 }
976 NXTARG: ;
977 }
978
979 if (argc < 1)
980 return CMD_RET_USAGE;
981
982 addr = simple_strtoul(argv[0], NULL, 16);
983 ptr = map_sysmem(addr, size);
984
985 if (size)
986 memset(ptr, '\0', size);
987
988 argc--;
989 argv++;
990
991 if (sep) { /* export as text file */
992 len = hexport_r(&env_htab, sep,
993 H_MATCH_KEY | H_MATCH_IDENT,
994 &ptr, size, argc, argv);
995 if (len < 0) {
996 pr_err("## Error: Cannot export environment: errno = %d\n",
997 errno);
998 return 1;
999 }
1000 sprintf(buf, "%zX", (size_t)len);
1001 env_set("filesize", buf);
1002
1003 return 0;
1004 }
1005
1006 envp = (env_t *)ptr;
1007
1008 if (chk) /* export as checksum protected block */
1009 res = (char *)envp->data;
1010 else /* export as raw binary data */
1011 res = ptr;
1012
1013 len = hexport_r(&env_htab, '\0',
1014 H_MATCH_KEY | H_MATCH_IDENT,
1015 &res, ENV_SIZE, argc, argv);
1016 if (len < 0) {
1017 pr_err("## Error: Cannot export environment: errno = %d\n",
1018 errno);
1019 return 1;
1020 }
1021
1022 if (chk) {
1023 envp->crc = crc32(0, envp->data,
1024 size ? size - offsetof(env_t, data) : ENV_SIZE);
1025 #ifdef CONFIG_ENV_ADDR_REDUND
1026 envp->flags = ENV_REDUND_ACTIVE;
1027 #endif
1028 }
1029 env_set_hex("filesize", len + offsetof(env_t, data));
1030
1031 return 0;
1032
1033 sep_err:
1034 printf("## Error: %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1035 cmd);
1036 return 1;
1037 }
1038 #endif
1039
1040 #ifdef CONFIG_CMD_IMPORTENV
1041 /*
1042 * env import [-d] [-t [-r] | -b | -c] addr [size] [var ...]
1043 * -d: delete existing environment before importing if no var is
1044 * passed; if vars are passed, if one var is in the current
1045 * environment but not in the environment at addr, delete var from
1046 * current environment;
1047 * otherwise overwrite / append to existing definitions
1048 * -t: assume text format; either "size" must be given or the
1049 * text data must be '\0' terminated
1050 * -r: handle CRLF like LF, that means exported variables with
1051 * a content which ends with \r won't get imported. Used
1052 * to import text files created with editors which are using CRLF
1053 * for line endings. Only effective in addition to -t.
1054 * -b: assume binary format ('\0' separated, "\0\0" terminated)
1055 * -c: assume checksum protected environment format
1056 * addr: memory address to read from
1057 * size: length of input data; if missing, proper '\0'
1058 * termination is mandatory
1059 * if var is set and size should be missing (i.e. '\0'
1060 * termination), set size to '-'
1061 * var... List of the names of the only variables that get imported from
1062 * the environment at address 'addr'. Without arguments, the whole
1063 * environment gets imported.
1064 */
do_env_import(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])1065 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
1066 int argc, char * const argv[])
1067 {
1068 ulong addr;
1069 char *cmd, *ptr;
1070 char sep = '\n';
1071 int chk = 0;
1072 int fmt = 0;
1073 int del = 0;
1074 int crlf_is_lf = 0;
1075 int wl = 0;
1076 size_t size;
1077
1078 cmd = *argv;
1079
1080 while (--argc > 0 && **++argv == '-') {
1081 char *arg = *argv;
1082 while (*++arg) {
1083 switch (*arg) {
1084 case 'b': /* raw binary format */
1085 if (fmt++)
1086 goto sep_err;
1087 sep = '\0';
1088 break;
1089 case 'c': /* external checksum format */
1090 if (fmt++)
1091 goto sep_err;
1092 sep = '\0';
1093 chk = 1;
1094 break;
1095 case 't': /* text format */
1096 if (fmt++)
1097 goto sep_err;
1098 sep = '\n';
1099 break;
1100 case 'r': /* handle CRLF like LF */
1101 crlf_is_lf = 1;
1102 break;
1103 case 'd':
1104 del = 1;
1105 break;
1106 default:
1107 return CMD_RET_USAGE;
1108 }
1109 }
1110 }
1111
1112 if (argc < 1)
1113 return CMD_RET_USAGE;
1114
1115 if (!fmt)
1116 printf("## Warning: defaulting to text format\n");
1117
1118 if (sep != '\n' && crlf_is_lf )
1119 crlf_is_lf = 0;
1120
1121 addr = simple_strtoul(argv[0], NULL, 16);
1122 ptr = map_sysmem(addr, 0);
1123
1124 if (argc >= 2 && strcmp(argv[1], "-")) {
1125 size = simple_strtoul(argv[1], NULL, 16);
1126 } else if (chk) {
1127 puts("## Error: external checksum format must pass size\n");
1128 return CMD_RET_FAILURE;
1129 } else {
1130 char *s = ptr;
1131
1132 size = 0;
1133
1134 while (size < MAX_ENV_SIZE) {
1135 if ((*s == sep) && (*(s+1) == '\0'))
1136 break;
1137 ++s;
1138 ++size;
1139 }
1140 if (size == MAX_ENV_SIZE) {
1141 printf("## Warning: Input data exceeds %d bytes"
1142 " - truncated\n", MAX_ENV_SIZE);
1143 }
1144 size += 2;
1145 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1146 }
1147
1148 if (argc > 2)
1149 wl = 1;
1150
1151 if (chk) {
1152 uint32_t crc;
1153 env_t *ep = (env_t *)ptr;
1154
1155 size -= offsetof(env_t, data);
1156 memcpy(&crc, &ep->crc, sizeof(crc));
1157
1158 if (crc32(0, ep->data, size) != crc) {
1159 puts("## Error: bad CRC, import failed\n");
1160 return 1;
1161 }
1162 ptr = (char *)ep->data;
1163 }
1164
1165 if (!himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1166 crlf_is_lf, wl ? argc - 2 : 0, wl ? &argv[2] : NULL)) {
1167 pr_err("## Error: Environment import failed: errno = %d\n",
1168 errno);
1169 return 1;
1170 }
1171 gd->flags |= GD_FLG_ENV_READY;
1172
1173 return 0;
1174
1175 sep_err:
1176 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1177 cmd);
1178 return 1;
1179 }
1180 #endif
1181
1182 #if defined(CONFIG_CMD_NVEDIT_INFO)
1183 /*
1184 * print_env_info - print environment information
1185 */
print_env_info(void)1186 static int print_env_info(void)
1187 {
1188 const char *value;
1189
1190 /* print environment validity value */
1191 switch (gd->env_valid) {
1192 case ENV_INVALID:
1193 value = "invalid";
1194 break;
1195 case ENV_VALID:
1196 value = "valid";
1197 break;
1198 case ENV_REDUND:
1199 value = "redundant";
1200 break;
1201 default:
1202 value = "unknown";
1203 break;
1204 }
1205 printf("env_valid = %s\n", value);
1206
1207 /* print environment ready flag */
1208 value = gd->flags & GD_FLG_ENV_READY ? "true" : "false";
1209 printf("env_ready = %s\n", value);
1210
1211 /* print environment using default flag */
1212 value = gd->flags & GD_FLG_ENV_DEFAULT ? "true" : "false";
1213 printf("env_use_default = %s\n", value);
1214
1215 return CMD_RET_SUCCESS;
1216 }
1217
1218 #define ENV_INFO_IS_DEFAULT BIT(0) /* default environment bit mask */
1219 #define ENV_INFO_IS_PERSISTED BIT(1) /* environment persistence bit mask */
1220
1221 /*
1222 * env info - display environment information
1223 * env info [-d] - evaluate whether default environment is used
1224 * env info [-p] - evaluate whether environment can be persisted
1225 */
do_env_info(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])1226 static int do_env_info(cmd_tbl_t *cmdtp, int flag,
1227 int argc, char * const argv[])
1228 {
1229 int eval_flags = 0;
1230 int eval_results = 0;
1231
1232 /* display environment information */
1233 if (argc <= 1)
1234 return print_env_info();
1235
1236 /* process options */
1237 while (--argc > 0 && **++argv == '-') {
1238 char *arg = *argv;
1239
1240 while (*++arg) {
1241 switch (*arg) {
1242 case 'd':
1243 eval_flags |= ENV_INFO_IS_DEFAULT;
1244 break;
1245 case 'p':
1246 eval_flags |= ENV_INFO_IS_PERSISTED;
1247 break;
1248 default:
1249 return CMD_RET_USAGE;
1250 }
1251 }
1252 }
1253
1254 /* evaluate whether default environment is used */
1255 if (eval_flags & ENV_INFO_IS_DEFAULT) {
1256 if (gd->flags & GD_FLG_ENV_DEFAULT) {
1257 printf("Default environment is used\n");
1258 eval_results |= ENV_INFO_IS_DEFAULT;
1259 } else {
1260 printf("Environment was loaded from persistent storage\n");
1261 }
1262 }
1263
1264 /* evaluate whether environment can be persisted */
1265 if (eval_flags & ENV_INFO_IS_PERSISTED) {
1266 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1267 printf("Environment can be persisted\n");
1268 eval_results |= ENV_INFO_IS_PERSISTED;
1269 #else
1270 printf("Environment cannot be persisted\n");
1271 #endif
1272 }
1273
1274 /* The result of evaluations is combined with AND */
1275 if (eval_flags != eval_results)
1276 return CMD_RET_FAILURE;
1277
1278 return CMD_RET_SUCCESS;
1279 }
1280 #endif
1281
1282 #if defined(CONFIG_CMD_ENV_EXISTS)
do_env_exists(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])1283 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1284 char * const argv[])
1285 {
1286 struct env_entry e, *ep;
1287
1288 if (argc < 2)
1289 return CMD_RET_USAGE;
1290
1291 e.key = argv[1];
1292 e.data = NULL;
1293 hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
1294
1295 return (ep == NULL) ? 1 : 0;
1296 }
1297 #endif
1298
1299 /*
1300 * New command line interface: "env" command with subcommands
1301 */
1302 static cmd_tbl_t cmd_env_sub[] = {
1303 #if defined(CONFIG_CMD_ASKENV)
1304 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1305 #endif
1306
1307 #ifndef CONFIG_MINI_BOOT
1308 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1309 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1310 #endif /* CONFIG_MINI_BOOT */
1311 #if defined(CONFIG_CMD_EDITENV)
1312 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1313 #endif
1314 #if defined(CONFIG_CMD_ENV_CALLBACK)
1315 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1316 #endif
1317 #if defined(CONFIG_CMD_ENV_FLAGS)
1318 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1319 #endif
1320 #if defined(CONFIG_CMD_EXPORTENV)
1321 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1322 #endif
1323 #if defined(CONFIG_CMD_GREPENV)
1324 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1325 #endif
1326 #if defined(CONFIG_CMD_IMPORTENV)
1327 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1328 #endif
1329 #if defined(CONFIG_CMD_NVEDIT_INFO)
1330 U_BOOT_CMD_MKENT(info, 2, 0, do_env_info, "", ""),
1331 #endif
1332 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1333 #if defined(CONFIG_CMD_RUN)
1334 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1335 #endif
1336 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1337 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1338 #if defined(CONFIG_CMD_ERASEENV)
1339 U_BOOT_CMD_MKENT(erase, 1, 0, do_env_erase, "", ""),
1340 #endif
1341 #endif
1342 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1343 #if defined(CONFIG_CMD_ENV_EXISTS)
1344 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1345 #endif
1346 };
1347
1348 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
env_reloc(void)1349 void env_reloc(void)
1350 {
1351 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1352 }
1353 #endif
1354
do_env(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])1355 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1356 {
1357 cmd_tbl_t *cp;
1358
1359 if (argc < 2)
1360 return CMD_RET_USAGE;
1361
1362 /* drop initial "env" arg */
1363 argc--;
1364 argv++;
1365
1366 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1367
1368 if (cp)
1369 return cp->cmd(cmdtp, flag, argc, argv);
1370
1371 return CMD_RET_USAGE;
1372 }
1373
1374 #ifdef CONFIG_SYS_LONGHELP
1375 static char env_help_text[] =
1376 #if defined(CONFIG_CMD_ASKENV)
1377 "ask name [message] [size] - ask for environment variable\nenv "
1378 #endif
1379 #if defined(CONFIG_CMD_ENV_CALLBACK)
1380 "callbacks - print callbacks and their associated variables\nenv "
1381 #endif
1382 "default [-f] -a - [forcibly] reset default environment\n"
1383 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1384 "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1385 #if defined(CONFIG_CMD_EDITENV)
1386 "env edit name - edit environment variable\n"
1387 #endif
1388 #if defined(CONFIG_CMD_ENV_EXISTS)
1389 "env exists name - tests for existence of variable\n"
1390 #endif
1391 #if defined(CONFIG_CMD_EXPORTENV)
1392 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1393 #endif
1394 #if defined(CONFIG_CMD_ENV_FLAGS)
1395 "env flags - print variables that have non-default flags\n"
1396 #endif
1397 #if defined(CONFIG_CMD_GREPENV)
1398 #ifdef CONFIG_REGEX
1399 "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1400 #else
1401 "env grep [-n | -v | -b] string [...] - search environment\n"
1402 #endif
1403 #endif
1404 #if defined(CONFIG_CMD_IMPORTENV)
1405 "env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import environment\n"
1406 #endif
1407 #if defined(CONFIG_CMD_NVEDIT_INFO)
1408 "env info - display environment information\n"
1409 "env info [-d] - whether default environment is used\n"
1410 "env info [-p] - whether environment can be persisted\n"
1411 #endif
1412 "env print [-a | name ...] - print environment\n"
1413 #if defined(CONFIG_CMD_NVEDIT_EFI)
1414 "env print -e [-guid guid|-all][-n] [name ...] - print UEFI environment\n"
1415 #endif
1416 #if defined(CONFIG_CMD_RUN)
1417 "env run var [...] - run commands in an environment variable\n"
1418 #endif
1419 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1420 "env save - save environment\n"
1421 #if defined(CONFIG_CMD_ERASEENV)
1422 "env erase - erase environment\n"
1423 #endif
1424 #endif
1425 #if defined(CONFIG_CMD_NVEDIT_EFI)
1426 "env set -e [-nv][-bs][-rt][-a][-i addr,size][-v] name [arg ...]\n"
1427 " - set UEFI variable; unset if '-i' or 'arg' not specified\n"
1428 #endif
1429 "env set [-f] name [arg ...]\n";
1430 #endif
1431
1432 U_BOOT_CMD(
1433 env, CONFIG_SYS_MAXARGS, 1, do_env,
1434 "environment handling commands", env_help_text
1435 );
1436
1437 /*
1438 * Old command line interface, kept for compatibility
1439 */
1440
1441 #if defined(CONFIG_CMD_EDITENV)
1442 U_BOOT_CMD_COMPLETE(
1443 editenv, 2, 0, do_env_edit,
1444 "edit environment variable",
1445 "name\n"
1446 " - edit environment variable 'name'",
1447 var_complete
1448 );
1449 #endif
1450
1451 U_BOOT_CMD_COMPLETE(
1452 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print,
1453 "print environment variables",
1454 "[-a]\n - print [all] values of all environment variables\n"
1455 #if defined(CONFIG_CMD_NVEDIT_EFI)
1456 "printenv -e [-guid guid|-all][-n] [name ...]\n"
1457 " - print UEFI variable 'name' or all the variables\n"
1458 " \"-n\": suppress dumping variable's value\n"
1459 #endif
1460 "printenv name ...\n"
1461 " - print value of environment variable 'name'",
1462 var_complete
1463 );
1464
1465 #ifdef CONFIG_CMD_GREPENV
1466 U_BOOT_CMD_COMPLETE(
1467 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep,
1468 "search environment variables",
1469 #ifdef CONFIG_REGEX
1470 "[-e] [-n | -v | -b] string ...\n"
1471 #else
1472 "[-n | -v | -b] string ...\n"
1473 #endif
1474 " - list environment name=value pairs matching 'string'\n"
1475 #ifdef CONFIG_REGEX
1476 " \"-e\": enable regular expressions;\n"
1477 #endif
1478 " \"-n\": search variable names; \"-v\": search values;\n"
1479 " \"-b\": search both names and values (default)",
1480 var_complete
1481 );
1482 #endif
1483
1484 U_BOOT_CMD_COMPLETE(
1485 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set,
1486 "set environment variables",
1487 #if defined(CONFIG_CMD_NVEDIT_EFI)
1488 "-e [-guid guid][-nv][-bs][-rt][-a][-v]\n"
1489 " [-i addr,size name], or [name [value ...]]\n"
1490 " - set UEFI variable 'name' to 'value' ...'\n"
1491 " \"-guid\": set vendor guid\n"
1492 " \"-nv\": set non-volatile attribute\n"
1493 " \"-bs\": set boot-service attribute\n"
1494 " \"-rt\": set runtime attribute\n"
1495 " \"-a\": append-write\n"
1496 " \"-i addr,size\": use <addr,size> as variable's value\n"
1497 " \"-v\": verbose message\n"
1498 " - delete UEFI variable 'name' if 'value' not specified\n"
1499 #endif
1500 "setenv [-f] name value ...\n"
1501 " - [forcibly] set environment variable 'name' to 'value ...'\n"
1502 "setenv [-f] name\n"
1503 " - [forcibly] delete environment variable 'name'",
1504 var_complete
1505 );
1506
1507 #if defined(CONFIG_CMD_ASKENV)
1508
1509 U_BOOT_CMD(
1510 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask,
1511 "get environment variables from stdin",
1512 "name [message] [size]\n"
1513 " - get environment variable 'name' from stdin (max 'size' chars)"
1514 );
1515 #endif
1516
1517 #if defined(CONFIG_CMD_RUN)
1518 U_BOOT_CMD_COMPLETE(
1519 run, CONFIG_SYS_MAXARGS, 1, do_run,
1520 "run commands in an environment variable",
1521 "var [...]\n"
1522 " - run the commands in the environment variable(s) 'var'",
1523 var_complete
1524 );
1525 #endif
1526 #endif /* CONFIG_SPL_BUILD */
1527