1 /* 2 * (C) Copyright 2000-2013 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> 6 * Andreas Heppel <aheppel@sysgo.de> 7 * 8 * Copyright 2011 Freescale Semiconductor, Inc. 9 * 10 * SPDX-License-Identifier: GPL-2.0+ 11 */ 12 13 /* 14 * Support for persistent environment data 15 * 16 * The "environment" is stored on external storage as a list of '\0' 17 * terminated "name=value" strings. The end of the list is marked by 18 * a double '\0'. The environment is preceded by a 32 bit CRC over 19 * the data part and, in case of redundant environment, a byte of 20 * flags. 21 * 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. 25 */ 26 27 #include <common.h> 28 #include <cli.h> 29 #include <command.h> 30 #include <console.h> 31 #include <environment.h> 32 #include <search.h> 33 #include <errno.h> 34 #include <malloc.h> 35 #include <mapmem.h> 36 #include <watchdog.h> 37 #include <linux/stddef.h> 38 #include <asm/byteorder.h> 39 #include <asm/io.h> 40 41 DECLARE_GLOBAL_DATA_PTR; 42 43 #if !defined(CONFIG_ENV_IS_IN_EEPROM) && \ 44 !defined(CONFIG_ENV_IS_IN_FLASH) && \ 45 !defined(CONFIG_ENV_IS_IN_MMC) && \ 46 !defined(CONFIG_ENV_IS_IN_FAT) && \ 47 !defined(CONFIG_ENV_IS_IN_EXT4) && \ 48 !defined(CONFIG_ENV_IS_IN_NAND) && \ 49 !defined(CONFIG_ENV_IS_IN_NVRAM) && \ 50 !defined(CONFIG_ENV_IS_IN_ONENAND) && \ 51 !defined(CONFIG_ENV_IS_IN_SATA) && \ 52 !defined(CONFIG_ENV_IS_IN_SPI_FLASH) && \ 53 !defined(CONFIG_ENV_IS_IN_REMOTE) && \ 54 !defined(CONFIG_ENV_IS_IN_UBI) && \ 55 !defined(CONFIG_ENV_IS_NOWHERE) 56 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\ 57 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE 58 #endif 59 60 /* 61 * Maximum expected input data size for import command 62 */ 63 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */ 64 65 /* 66 * This variable is incremented on each do_env_set(), so it can 67 * be used via get_env_id() as an indication, if the environment 68 * has changed or not. So it is possible to reread an environment 69 * variable only if the environment was changed ... done so for 70 * example in NetInitLoop() 71 */ 72 static int env_id = 1; 73 74 int get_env_id(void) 75 { 76 return env_id; 77 } 78 79 #ifndef CONFIG_SPL_BUILD 80 /* 81 * Command interface: print one or all environment variables 82 * 83 * Returns 0 in case of error, or length of printed string 84 */ 85 static int env_print(char *name, int flag) 86 { 87 char *res = NULL; 88 ssize_t len; 89 90 if (name) { /* print a single name */ 91 ENTRY e, *ep; 92 93 e.key = name; 94 e.data = NULL; 95 hsearch_r(e, FIND, &ep, &env_htab, flag); 96 if (ep == NULL) 97 return 0; 98 len = printf("%s=%s\n", ep->key, ep->data); 99 return len; 100 } 101 102 /* print whole list */ 103 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL); 104 105 if (len > 0) { 106 puts(res); 107 free(res); 108 return len; 109 } 110 111 /* should never happen */ 112 printf("## Error: cannot export environment\n"); 113 return 0; 114 } 115 116 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc, 117 char * const argv[]) 118 { 119 int i; 120 int rcode = 0; 121 int env_flag = H_HIDE_DOT; 122 123 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') { 124 argc--; 125 argv++; 126 env_flag &= ~H_HIDE_DOT; 127 } 128 129 if (argc == 1) { 130 /* print all env vars */ 131 rcode = env_print(NULL, env_flag); 132 if (!rcode) 133 return 1; 134 printf("\nEnvironment size: %d/%ld bytes\n", 135 rcode, (ulong)ENV_SIZE); 136 return 0; 137 } 138 139 /* print selected env vars */ 140 env_flag &= ~H_HIDE_DOT; 141 for (i = 1; i < argc; ++i) { 142 int rc = env_print(argv[i], env_flag); 143 if (!rc) { 144 printf("## Error: \"%s\" not defined\n", argv[i]); 145 ++rcode; 146 } 147 } 148 149 return rcode; 150 } 151 152 #ifdef CONFIG_CMD_GREPENV 153 static int do_env_grep(cmd_tbl_t *cmdtp, int flag, 154 int argc, char * const argv[]) 155 { 156 char *res = NULL; 157 int len, grep_how, grep_what; 158 159 if (argc < 2) 160 return CMD_RET_USAGE; 161 162 grep_how = H_MATCH_SUBSTR; /* default: substring search */ 163 grep_what = H_MATCH_BOTH; /* default: grep names and values */ 164 165 while (--argc > 0 && **++argv == '-') { 166 char *arg = *argv; 167 while (*++arg) { 168 switch (*arg) { 169 #ifdef CONFIG_REGEX 170 case 'e': /* use regex matching */ 171 grep_how = H_MATCH_REGEX; 172 break; 173 #endif 174 case 'n': /* grep for name */ 175 grep_what = H_MATCH_KEY; 176 break; 177 case 'v': /* grep for value */ 178 grep_what = H_MATCH_DATA; 179 break; 180 case 'b': /* grep for both */ 181 grep_what = H_MATCH_BOTH; 182 break; 183 case '-': 184 goto DONE; 185 default: 186 return CMD_RET_USAGE; 187 } 188 } 189 } 190 191 DONE: 192 len = hexport_r(&env_htab, '\n', 193 flag | grep_what | grep_how, 194 &res, 0, argc, argv); 195 196 if (len > 0) { 197 puts(res); 198 free(res); 199 } 200 201 if (len < 2) 202 return 1; 203 204 return 0; 205 } 206 #endif 207 #endif /* CONFIG_SPL_BUILD */ 208 209 /* 210 * Set a new environment variable, 211 * or replace or delete an existing one. 212 */ 213 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag) 214 { 215 int i, len; 216 char *name, *value, *s; 217 ENTRY e, *ep; 218 219 debug("Initial value for argc=%d\n", argc); 220 while (argc > 1 && **(argv + 1) == '-') { 221 char *arg = *++argv; 222 223 --argc; 224 while (*++arg) { 225 switch (*arg) { 226 case 'f': /* force */ 227 env_flag |= H_FORCE; 228 break; 229 default: 230 return CMD_RET_USAGE; 231 } 232 } 233 } 234 debug("Final value for argc=%d\n", argc); 235 name = argv[1]; 236 237 if (strchr(name, '=')) { 238 printf("## Error: illegal character '='" 239 "in variable name \"%s\"\n", name); 240 return 1; 241 } 242 243 env_id++; 244 245 /* Delete only ? */ 246 if (argc < 3 || argv[2] == NULL) { 247 int rc = hdelete_r(name, &env_htab, env_flag); 248 return !rc; 249 } 250 251 /* 252 * Insert / replace new value 253 */ 254 for (i = 2, len = 0; i < argc; ++i) 255 len += strlen(argv[i]) + 1; 256 257 value = malloc(len); 258 if (value == NULL) { 259 printf("## Can't malloc %d bytes\n", len); 260 return 1; 261 } 262 for (i = 2, s = value; i < argc; ++i) { 263 char *v = argv[i]; 264 265 while ((*s++ = *v++) != '\0') 266 ; 267 *(s - 1) = ' '; 268 } 269 if (s != value) 270 *--s = '\0'; 271 272 e.key = name; 273 e.data = value; 274 hsearch_r(e, ENTER, &ep, &env_htab, env_flag); 275 free(value); 276 if (!ep) { 277 printf("## Error inserting \"%s\" variable, errno=%d\n", 278 name, errno); 279 return 1; 280 } 281 282 return 0; 283 } 284 285 int env_set(const char *varname, const char *varvalue) 286 { 287 const char * const argv[4] = { "setenv", varname, varvalue, NULL }; 288 289 /* before import into hashtable */ 290 if (!(gd->flags & GD_FLG_ENV_READY)) 291 return 1; 292 293 if (varvalue == NULL || varvalue[0] == '\0') 294 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC); 295 else 296 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC); 297 } 298 299 static int env_append(const char *varname, const char *varvalue) 300 { 301 int len = 0; 302 char *oldvalue, *newvalue; 303 304 /* before import into hashtable */ 305 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 306 return 1; 307 308 if (varvalue) 309 len += strlen(varvalue); 310 311 oldvalue = env_get(varname); 312 if (oldvalue) { 313 len += strlen(oldvalue); 314 /* Exist ! */ 315 if (strstr(oldvalue, varvalue)) { 316 debug("%s: '%s' is already exist in '%s'\n", 317 __func__, varvalue, varname); 318 return 0; 319 } 320 } 321 322 newvalue = malloc(len + 2); 323 if (!newvalue) { 324 printf("Error: malloc in %s failed!\n", __func__); 325 return 1; 326 } 327 328 *newvalue = '\0'; 329 330 if (oldvalue) { 331 strcpy(newvalue, oldvalue); 332 strcat(newvalue, " "); 333 } 334 335 if (varvalue) 336 strcat(newvalue, varvalue); 337 338 env_set(varname, newvalue); 339 free(newvalue); 340 341 return 0; 342 } 343 344 static int env_replace(const char *varname, const char *substr, 345 const char *replacement) 346 { 347 char *oldvalue, *newvalue, *dst, *sub; 348 int substr_len, replace_len, oldvalue_len, len; 349 350 /* before import into hashtable */ 351 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 352 return 1; 353 354 oldvalue = env_get(varname); 355 if (!oldvalue) 356 return 1; 357 358 sub = strstr(oldvalue, substr); 359 if (!sub) 360 return 1; 361 362 oldvalue_len = strlen(oldvalue) + 1; 363 substr_len = strlen(substr); 364 replace_len = strlen(replacement); 365 366 if (replace_len >= substr_len) 367 len = oldvalue_len + replace_len - substr_len; 368 else 369 len = oldvalue_len + substr_len - replace_len; 370 371 newvalue = malloc(len); 372 if (!newvalue) { 373 printf("Error: malloc in %s failed!\n", __func__); 374 return 1; 375 } 376 377 *newvalue = '\0'; 378 379 /* 380 * Orignal string is splited like format: [str1.. substr str2..] 381 */ 382 383 /* str1.. */ 384 dst = newvalue; 385 dst = strncat(dst, oldvalue, sub - oldvalue); 386 387 /* substr */ 388 dst += sub - oldvalue; 389 dst = strncat(dst, replacement, replace_len); 390 391 /* str2.. */ 392 dst += replace_len; 393 len = oldvalue_len - substr_len - (sub - oldvalue); 394 dst = strncat(dst, sub + substr_len, len); 395 396 env_set(varname, newvalue); 397 free(newvalue); 398 399 return 0; 400 } 401 402 #define ARGS_ITEM_NUM 50 403 404 int env_update(const char *varname, const char *varvalue) 405 { 406 /* 'a_' means "varargs_'; 'v_' means 'varvalue_' */ 407 char *varargs; 408 char *a_title, *v_title; 409 char *a_string_tok, *a_item_tok = NULL; 410 char *v_string_tok, *v_item_tok = NULL; 411 char *a_item, *a_items[ARGS_ITEM_NUM] = { NULL }; 412 char *v_item, *v_items[ARGS_ITEM_NUM] = { NULL }; 413 bool match = false; 414 int i = 0, j = 0; 415 416 /* Before import into hashtable */ 417 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 418 return 1; 419 420 /* If varname doesn't exist, create it and set varvalue */ 421 varargs = env_get(varname); 422 if (!varargs) { 423 env_set(varname, varvalue); 424 return 0; 425 } 426 427 /* Malloc a temporary varargs for strtok */ 428 a_string_tok = strdup(varargs); 429 if (!a_string_tok) { 430 printf("Error: strdup in failed, line=%d\n", __LINE__); 431 return 1; 432 } 433 434 /* Malloc a temporary varvalue for strtok */ 435 v_string_tok = strdup(varvalue); 436 if (!v_string_tok) { 437 free(a_string_tok); 438 printf("Error: strdup in failed, line=%d\n", __LINE__); 439 return 1; 440 } 441 442 /* Splite varargs into items containing "=" by the blank */ 443 a_item = strtok(a_string_tok, " "); 444 while (a_item && i < ARGS_ITEM_NUM) { 445 debug("%s: [a_item %d]: %s\n", __func__, i, a_item); 446 if (strstr(a_item, "=")) 447 a_items[i++] = a_item; 448 a_item = strtok(NULL, " "); 449 } 450 451 /* 452 * Splite varvalue into items containing "=" by the blank. 453 * parse varvalue title, eg: "bootmode=emmc", title is "bootmode" 454 */ 455 v_item = strtok(v_string_tok, " "); 456 while (v_item && j < ARGS_ITEM_NUM) { 457 debug("%s: <v_item %d>: %s\n", __func__, j, v_item); 458 if (strstr(v_item, "=")) 459 v_items[j++] = v_item; 460 else 461 env_append(varname, v_item); 462 v_item = strtok(NULL, " "); 463 } 464 465 /* For every v_item, search its title */ 466 for (j = 0; j < ARGS_ITEM_NUM && v_items[j]; j++) { 467 v_item = v_items[j]; 468 /* Malloc a temporary a_item for strtok */ 469 v_item_tok = strdup(v_item); 470 if (!v_item_tok) { 471 printf("Error: strdup in failed, line=%d\n", __LINE__); 472 free(a_string_tok); 473 free(v_string_tok); 474 return 1; 475 } 476 v_title = strtok(v_item_tok, "="); 477 debug("%s: <v_title>: %s\n", __func__, v_title); 478 479 /* For every a_item, search its title */ 480 for (i = 0; i < ARGS_ITEM_NUM && a_items[i]; i++) { 481 a_item = a_items[i]; 482 /* Malloc a temporary a_item for strtok */ 483 a_item_tok = strdup(a_item); 484 if (!a_item_tok) { 485 printf("Error: strdup in failed, line=%d\n", __LINE__); 486 free(a_string_tok); 487 free(v_string_tok); 488 free(v_item_tok); 489 return 1; 490 } 491 492 a_title = strtok(a_item_tok, "="); 493 debug("%s: [a_title]: %s\n", __func__, a_title); 494 if (!strcmp(a_title, v_title)) { 495 /* Find! replace it */ 496 env_replace(varname, a_item, v_item); 497 free(a_item_tok); 498 match = true; 499 break; 500 } 501 free(a_item_tok); 502 } 503 504 /* Not find, just append */ 505 if (!match) { 506 debug("%s: append '%s' to the '%s' end\n", 507 __func__, v_item, varname); 508 env_append(varname, v_item); 509 } 510 match = false; 511 free(v_item_tok); 512 } 513 514 free(v_string_tok); 515 free(a_string_tok); 516 517 return 0; 518 } 519 520 /** 521 * Set an environment variable to an integer value 522 * 523 * @param varname Environment variable to set 524 * @param value Value to set it to 525 * @return 0 if ok, 1 on error 526 */ 527 int env_set_ulong(const char *varname, ulong value) 528 { 529 /* TODO: this should be unsigned */ 530 char *str = simple_itoa(value); 531 532 return env_set(varname, str); 533 } 534 535 /** 536 * Set an environment variable to an value in hex 537 * 538 * @param varname Environment variable to set 539 * @param value Value to set it to 540 * @return 0 if ok, 1 on error 541 */ 542 int env_set_hex(const char *varname, ulong value) 543 { 544 char str[17]; 545 546 sprintf(str, "%lx", value); 547 return env_set(varname, str); 548 } 549 550 ulong env_get_hex(const char *varname, ulong default_val) 551 { 552 const char *s; 553 ulong value; 554 char *endp; 555 556 s = env_get(varname); 557 if (s) 558 value = simple_strtoul(s, &endp, 16); 559 if (!s || endp == s) 560 return default_val; 561 562 return value; 563 } 564 565 #ifndef CONFIG_SPL_BUILD 566 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 567 { 568 if (argc < 2) 569 return CMD_RET_USAGE; 570 571 return _do_env_set(flag, argc, argv, H_INTERACTIVE); 572 } 573 574 /* 575 * Prompt for environment variable 576 */ 577 #if defined(CONFIG_CMD_ASKENV) 578 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 579 { 580 char message[CONFIG_SYS_CBSIZE]; 581 int i, len, pos, size; 582 char *local_args[4]; 583 char *endptr; 584 585 local_args[0] = argv[0]; 586 local_args[1] = argv[1]; 587 local_args[2] = NULL; 588 local_args[3] = NULL; 589 590 /* 591 * Check the syntax: 592 * 593 * env_ask envname [message1 ...] [size] 594 */ 595 if (argc == 1) 596 return CMD_RET_USAGE; 597 598 /* 599 * We test the last argument if it can be converted 600 * into a decimal number. If yes, we assume it's 601 * the size. Otherwise we echo it as part of the 602 * message. 603 */ 604 i = simple_strtoul(argv[argc - 1], &endptr, 10); 605 if (*endptr != '\0') { /* no size */ 606 size = CONFIG_SYS_CBSIZE - 1; 607 } else { /* size given */ 608 size = i; 609 --argc; 610 } 611 612 if (argc <= 2) { 613 sprintf(message, "Please enter '%s': ", argv[1]); 614 } else { 615 /* env_ask envname message1 ... messagen [size] */ 616 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) { 617 if (pos) 618 message[pos++] = ' '; 619 620 strncpy(message + pos, argv[i], sizeof(message) - pos); 621 pos += strlen(argv[i]); 622 } 623 if (pos < sizeof(message) - 1) { 624 message[pos++] = ' '; 625 message[pos] = '\0'; 626 } else 627 message[CONFIG_SYS_CBSIZE - 1] = '\0'; 628 } 629 630 if (size >= CONFIG_SYS_CBSIZE) 631 size = CONFIG_SYS_CBSIZE - 1; 632 633 if (size <= 0) 634 return 1; 635 636 /* prompt for input */ 637 len = cli_readline(message); 638 639 if (size < len) 640 console_buffer[size] = '\0'; 641 642 len = 2; 643 if (console_buffer[0] != '\0') { 644 local_args[2] = console_buffer; 645 len = 3; 646 } 647 648 /* Continue calling setenv code */ 649 return _do_env_set(flag, len, local_args, H_INTERACTIVE); 650 } 651 #endif 652 653 #if defined(CONFIG_CMD_ENV_CALLBACK) 654 static int print_static_binding(const char *var_name, const char *callback_name, 655 void *priv) 656 { 657 printf("\t%-20s %-20s\n", var_name, callback_name); 658 659 return 0; 660 } 661 662 static int print_active_callback(ENTRY *entry) 663 { 664 struct env_clbk_tbl *clbkp; 665 int i; 666 int num_callbacks; 667 668 if (entry->callback == NULL) 669 return 0; 670 671 /* look up the callback in the linker-list */ 672 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk); 673 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk); 674 i < num_callbacks; 675 i++, clbkp++) { 676 #if defined(CONFIG_NEEDS_MANUAL_RELOC) 677 if (entry->callback == clbkp->callback + gd->reloc_off) 678 #else 679 if (entry->callback == clbkp->callback) 680 #endif 681 break; 682 } 683 684 if (i == num_callbacks) 685 /* this should probably never happen, but just in case... */ 686 printf("\t%-20s %p\n", entry->key, entry->callback); 687 else 688 printf("\t%-20s %-20s\n", entry->key, clbkp->name); 689 690 return 0; 691 } 692 693 /* 694 * Print the callbacks available and what they are bound to 695 */ 696 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 697 { 698 struct env_clbk_tbl *clbkp; 699 int i; 700 int num_callbacks; 701 702 /* Print the available callbacks */ 703 puts("Available callbacks:\n"); 704 puts("\tCallback Name\n"); 705 puts("\t-------------\n"); 706 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk); 707 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk); 708 i < num_callbacks; 709 i++, clbkp++) 710 printf("\t%s\n", clbkp->name); 711 puts("\n"); 712 713 /* Print the static bindings that may exist */ 714 puts("Static callback bindings:\n"); 715 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name"); 716 printf("\t%-20s %-20s\n", "-------------", "-------------"); 717 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL); 718 puts("\n"); 719 720 /* walk through each variable and print the callback if it has one */ 721 puts("Active callback bindings:\n"); 722 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name"); 723 printf("\t%-20s %-20s\n", "-------------", "-------------"); 724 hwalk_r(&env_htab, print_active_callback); 725 return 0; 726 } 727 #endif 728 729 #if defined(CONFIG_CMD_ENV_FLAGS) 730 static int print_static_flags(const char *var_name, const char *flags, 731 void *priv) 732 { 733 enum env_flags_vartype type = env_flags_parse_vartype(flags); 734 enum env_flags_varaccess access = env_flags_parse_varaccess(flags); 735 736 printf("\t%-20s %-20s %-20s\n", var_name, 737 env_flags_get_vartype_name(type), 738 env_flags_get_varaccess_name(access)); 739 740 return 0; 741 } 742 743 static int print_active_flags(ENTRY *entry) 744 { 745 enum env_flags_vartype type; 746 enum env_flags_varaccess access; 747 748 if (entry->flags == 0) 749 return 0; 750 751 type = (enum env_flags_vartype) 752 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK); 753 access = env_flags_parse_varaccess_from_binflags(entry->flags); 754 printf("\t%-20s %-20s %-20s\n", entry->key, 755 env_flags_get_vartype_name(type), 756 env_flags_get_varaccess_name(access)); 757 758 return 0; 759 } 760 761 /* 762 * Print the flags available and what variables have flags 763 */ 764 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 765 { 766 /* Print the available variable types */ 767 printf("Available variable type flags (position %d):\n", 768 ENV_FLAGS_VARTYPE_LOC); 769 puts("\tFlag\tVariable Type Name\n"); 770 puts("\t----\t------------------\n"); 771 env_flags_print_vartypes(); 772 puts("\n"); 773 774 /* Print the available variable access types */ 775 printf("Available variable access flags (position %d):\n", 776 ENV_FLAGS_VARACCESS_LOC); 777 puts("\tFlag\tVariable Access Name\n"); 778 puts("\t----\t--------------------\n"); 779 env_flags_print_varaccess(); 780 puts("\n"); 781 782 /* Print the static flags that may exist */ 783 puts("Static flags:\n"); 784 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type", 785 "Variable Access"); 786 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------", 787 "---------------"); 788 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL); 789 puts("\n"); 790 791 /* walk through each variable and print the flags if non-default */ 792 puts("Active flags:\n"); 793 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type", 794 "Variable Access"); 795 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------", 796 "---------------"); 797 hwalk_r(&env_htab, print_active_flags); 798 return 0; 799 } 800 #endif 801 802 /* 803 * Interactively edit an environment variable 804 */ 805 #if defined(CONFIG_CMD_EDITENV) 806 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, 807 char * const argv[]) 808 { 809 char buffer[CONFIG_SYS_CBSIZE]; 810 char *init_val; 811 812 if (argc < 2) 813 return CMD_RET_USAGE; 814 815 /* before import into hashtable */ 816 if (!(gd->flags & GD_FLG_ENV_READY)) 817 return 1; 818 819 /* Set read buffer to initial value or empty sting */ 820 init_val = env_get(argv[1]); 821 if (init_val) 822 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val); 823 else 824 buffer[0] = '\0'; 825 826 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0) 827 return 1; 828 829 if (buffer[0] == '\0') { 830 const char * const _argv[3] = { "setenv", argv[1], NULL }; 831 832 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE); 833 } else { 834 const char * const _argv[4] = { "setenv", argv[1], buffer, 835 NULL }; 836 837 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE); 838 } 839 } 840 #endif /* CONFIG_CMD_EDITENV */ 841 #endif /* CONFIG_SPL_BUILD */ 842 843 /* 844 * Look up variable from environment, 845 * return address of storage for that variable, 846 * or NULL if not found 847 */ 848 char *env_get(const char *name) 849 { 850 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */ 851 ENTRY e, *ep; 852 853 WATCHDOG_RESET(); 854 855 e.key = name; 856 e.data = NULL; 857 hsearch_r(e, FIND, &ep, &env_htab, 0); 858 859 return ep ? ep->data : NULL; 860 } 861 862 /* restricted capabilities before import */ 863 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0) 864 return (char *)(gd->env_buf); 865 866 return NULL; 867 } 868 869 /* 870 * Look up variable from environment for restricted C runtime env. 871 */ 872 int env_get_f(const char *name, char *buf, unsigned len) 873 { 874 int i, nxt; 875 876 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) { 877 int val, n; 878 879 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) { 880 if (nxt >= CONFIG_ENV_SIZE) 881 return -1; 882 } 883 884 val = envmatch((uchar *)name, i); 885 if (val < 0) 886 continue; 887 888 /* found; copy out */ 889 for (n = 0; n < len; ++n, ++buf) { 890 *buf = env_get_char(val++); 891 if (*buf == '\0') 892 return n; 893 } 894 895 if (n) 896 *--buf = '\0'; 897 898 printf("env_buf [%d bytes] too small for value of \"%s\"\n", 899 len, name); 900 901 return n; 902 } 903 904 return -1; 905 } 906 907 /** 908 * Decode the integer value of an environment variable and return it. 909 * 910 * @param name Name of environemnt variable 911 * @param base Number base to use (normally 10, or 16 for hex) 912 * @param default_val Default value to return if the variable is not 913 * found 914 * @return the decoded value, or default_val if not found 915 */ 916 ulong env_get_ulong(const char *name, int base, ulong default_val) 917 { 918 /* 919 * We can use env_get() here, even before relocation, since the 920 * environment variable value is an integer and thus short. 921 */ 922 const char *str = env_get(name); 923 924 return str ? simple_strtoul(str, NULL, base) : default_val; 925 } 926 927 #ifndef CONFIG_SPL_BUILD 928 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 929 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, 930 char * const argv[]) 931 { 932 struct env_driver *env = env_driver_lookup_default(); 933 934 printf("Saving Environment to %s...\n", env->name); 935 936 return env_save() ? 1 : 0; 937 } 938 939 U_BOOT_CMD( 940 saveenv, 1, 0, do_env_save, 941 "save environment variables to persistent storage", 942 "" 943 ); 944 #endif 945 #endif /* CONFIG_SPL_BUILD */ 946 947 948 /* 949 * Match a name / name=value pair 950 * 951 * s1 is either a simple 'name', or a 'name=value' pair. 952 * i2 is the environment index for a 'name2=value2' pair. 953 * If the names match, return the index for the value2, else -1. 954 */ 955 int envmatch(uchar *s1, int i2) 956 { 957 if (s1 == NULL) 958 return -1; 959 960 while (*s1 == env_get_char(i2++)) 961 if (*s1++ == '=') 962 return i2; 963 964 if (*s1 == '\0' && env_get_char(i2-1) == '=') 965 return i2; 966 967 return -1; 968 } 969 970 #ifndef CONFIG_SPL_BUILD 971 static int do_env_default(cmd_tbl_t *cmdtp, int __flag, 972 int argc, char * const argv[]) 973 { 974 int all = 0, flag = 0; 975 976 debug("Initial value for argc=%d\n", argc); 977 while (--argc > 0 && **++argv == '-') { 978 char *arg = *argv; 979 980 while (*++arg) { 981 switch (*arg) { 982 case 'a': /* default all */ 983 all = 1; 984 break; 985 case 'f': /* force */ 986 flag |= H_FORCE; 987 break; 988 default: 989 return cmd_usage(cmdtp); 990 } 991 } 992 } 993 debug("Final value for argc=%d\n", argc); 994 if (all && (argc == 0)) { 995 /* Reset the whole environment */ 996 set_default_env("## Resetting to default environment\n"); 997 return 0; 998 } 999 if (!all && (argc > 0)) { 1000 /* Reset individual variables */ 1001 set_default_vars(argc, argv); 1002 return 0; 1003 } 1004 1005 return cmd_usage(cmdtp); 1006 } 1007 1008 static int do_env_delete(cmd_tbl_t *cmdtp, int flag, 1009 int argc, char * const argv[]) 1010 { 1011 int env_flag = H_INTERACTIVE; 1012 int ret = 0; 1013 1014 debug("Initial value for argc=%d\n", argc); 1015 while (argc > 1 && **(argv + 1) == '-') { 1016 char *arg = *++argv; 1017 1018 --argc; 1019 while (*++arg) { 1020 switch (*arg) { 1021 case 'f': /* force */ 1022 env_flag |= H_FORCE; 1023 break; 1024 default: 1025 return CMD_RET_USAGE; 1026 } 1027 } 1028 } 1029 debug("Final value for argc=%d\n", argc); 1030 1031 env_id++; 1032 1033 while (--argc > 0) { 1034 char *name = *++argv; 1035 1036 if (!hdelete_r(name, &env_htab, env_flag)) 1037 ret = 1; 1038 } 1039 1040 return ret; 1041 } 1042 1043 #ifdef CONFIG_CMD_EXPORTENV 1044 /* 1045 * env export [-t | -b | -c] [-s size] addr [var ...] 1046 * -t: export as text format; if size is given, data will be 1047 * padded with '\0' bytes; if not, one terminating '\0' 1048 * will be added (which is included in the "filesize" 1049 * setting so you can for exmple copy this to flash and 1050 * keep the termination). 1051 * -b: export as binary format (name=value pairs separated by 1052 * '\0', list end marked by double "\0\0") 1053 * -c: export as checksum protected environment format as 1054 * used for example by "saveenv" command 1055 * -s size: 1056 * size of output buffer 1057 * addr: memory address where environment gets stored 1058 * var... List of variable names that get included into the 1059 * export. Without arguments, the whole environment gets 1060 * exported. 1061 * 1062 * With "-c" and size is NOT given, then the export command will 1063 * format the data as currently used for the persistent storage, 1064 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and 1065 * prepend a valid CRC32 checksum and, in case of redundant 1066 * environment, a "current" redundancy flag. If size is given, this 1067 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32 1068 * checksum and redundancy flag will be inserted. 1069 * 1070 * With "-b" and "-t", always only the real data (including a 1071 * terminating '\0' byte) will be written; here the optional size 1072 * argument will be used to make sure not to overflow the user 1073 * provided buffer; the command will abort if the size is not 1074 * sufficient. Any remaining space will be '\0' padded. 1075 * 1076 * On successful return, the variable "filesize" will be set. 1077 * Note that filesize includes the trailing/terminating '\0' byte(s). 1078 * 1079 * Usage scenario: create a text snapshot/backup of the current settings: 1080 * 1081 * => env export -t 100000 1082 * => era ${backup_addr} +${filesize} 1083 * => cp.b 100000 ${backup_addr} ${filesize} 1084 * 1085 * Re-import this snapshot, deleting all other settings: 1086 * 1087 * => env import -d -t ${backup_addr} 1088 */ 1089 static int do_env_export(cmd_tbl_t *cmdtp, int flag, 1090 int argc, char * const argv[]) 1091 { 1092 char buf[32]; 1093 ulong addr; 1094 char *ptr, *cmd, *res; 1095 size_t size = 0; 1096 ssize_t len; 1097 env_t *envp; 1098 char sep = '\n'; 1099 int chk = 0; 1100 int fmt = 0; 1101 1102 cmd = *argv; 1103 1104 while (--argc > 0 && **++argv == '-') { 1105 char *arg = *argv; 1106 while (*++arg) { 1107 switch (*arg) { 1108 case 'b': /* raw binary format */ 1109 if (fmt++) 1110 goto sep_err; 1111 sep = '\0'; 1112 break; 1113 case 'c': /* external checksum format */ 1114 if (fmt++) 1115 goto sep_err; 1116 sep = '\0'; 1117 chk = 1; 1118 break; 1119 case 's': /* size given */ 1120 if (--argc <= 0) 1121 return cmd_usage(cmdtp); 1122 size = simple_strtoul(*++argv, NULL, 16); 1123 goto NXTARG; 1124 case 't': /* text format */ 1125 if (fmt++) 1126 goto sep_err; 1127 sep = '\n'; 1128 break; 1129 default: 1130 return CMD_RET_USAGE; 1131 } 1132 } 1133 NXTARG: ; 1134 } 1135 1136 if (argc < 1) 1137 return CMD_RET_USAGE; 1138 1139 addr = simple_strtoul(argv[0], NULL, 16); 1140 ptr = map_sysmem(addr, size); 1141 1142 if (size) 1143 memset(ptr, '\0', size); 1144 1145 argc--; 1146 argv++; 1147 1148 if (sep) { /* export as text file */ 1149 len = hexport_r(&env_htab, sep, 1150 H_MATCH_KEY | H_MATCH_IDENT, 1151 &ptr, size, argc, argv); 1152 if (len < 0) { 1153 pr_err("Cannot export environment: errno = %d\n", errno); 1154 return 1; 1155 } 1156 sprintf(buf, "%zX", (size_t)len); 1157 env_set("filesize", buf); 1158 1159 return 0; 1160 } 1161 1162 envp = (env_t *)ptr; 1163 1164 if (chk) /* export as checksum protected block */ 1165 res = (char *)envp->data; 1166 else /* export as raw binary data */ 1167 res = ptr; 1168 1169 len = hexport_r(&env_htab, '\0', 1170 H_MATCH_KEY | H_MATCH_IDENT, 1171 &res, ENV_SIZE, argc, argv); 1172 if (len < 0) { 1173 pr_err("Cannot export environment: errno = %d\n", errno); 1174 return 1; 1175 } 1176 1177 if (chk) { 1178 envp->crc = crc32(0, envp->data, ENV_SIZE); 1179 #ifdef CONFIG_ENV_ADDR_REDUND 1180 envp->flags = ACTIVE_FLAG; 1181 #endif 1182 } 1183 env_set_hex("filesize", len + offsetof(env_t, data)); 1184 1185 return 0; 1186 1187 sep_err: 1188 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd); 1189 return 1; 1190 } 1191 #endif 1192 1193 #ifdef CONFIG_CMD_IMPORTENV 1194 /* 1195 * env import [-d] [-t [-r] | -b | -c] addr [size] 1196 * -d: delete existing environment before importing; 1197 * otherwise overwrite / append to existing definitions 1198 * -t: assume text format; either "size" must be given or the 1199 * text data must be '\0' terminated 1200 * -r: handle CRLF like LF, that means exported variables with 1201 * a content which ends with \r won't get imported. Used 1202 * to import text files created with editors which are using CRLF 1203 * for line endings. Only effective in addition to -t. 1204 * -b: assume binary format ('\0' separated, "\0\0" terminated) 1205 * -c: assume checksum protected environment format 1206 * addr: memory address to read from 1207 * size: length of input data; if missing, proper '\0' 1208 * termination is mandatory 1209 */ 1210 static int do_env_import(cmd_tbl_t *cmdtp, int flag, 1211 int argc, char * const argv[]) 1212 { 1213 ulong addr; 1214 char *cmd, *ptr; 1215 char sep = '\n'; 1216 int chk = 0; 1217 int fmt = 0; 1218 int del = 0; 1219 int crlf_is_lf = 0; 1220 size_t size; 1221 1222 cmd = *argv; 1223 1224 while (--argc > 0 && **++argv == '-') { 1225 char *arg = *argv; 1226 while (*++arg) { 1227 switch (*arg) { 1228 case 'b': /* raw binary format */ 1229 if (fmt++) 1230 goto sep_err; 1231 sep = '\0'; 1232 break; 1233 case 'c': /* external checksum format */ 1234 if (fmt++) 1235 goto sep_err; 1236 sep = '\0'; 1237 chk = 1; 1238 break; 1239 case 't': /* text format */ 1240 if (fmt++) 1241 goto sep_err; 1242 sep = '\n'; 1243 break; 1244 case 'r': /* handle CRLF like LF */ 1245 crlf_is_lf = 1; 1246 break; 1247 case 'd': 1248 del = 1; 1249 break; 1250 default: 1251 return CMD_RET_USAGE; 1252 } 1253 } 1254 } 1255 1256 if (argc < 1) 1257 return CMD_RET_USAGE; 1258 1259 if (!fmt) 1260 printf("## Warning: defaulting to text format\n"); 1261 1262 if (sep != '\n' && crlf_is_lf ) 1263 crlf_is_lf = 0; 1264 1265 addr = simple_strtoul(argv[0], NULL, 16); 1266 ptr = map_sysmem(addr, 0); 1267 1268 if (argc == 2) { 1269 size = simple_strtoul(argv[1], NULL, 16); 1270 } else if (argc == 1 && chk) { 1271 puts("## Error: external checksum format must pass size\n"); 1272 return CMD_RET_FAILURE; 1273 } else { 1274 char *s = ptr; 1275 1276 size = 0; 1277 1278 while (size < MAX_ENV_SIZE) { 1279 if ((*s == sep) && (*(s+1) == '\0')) 1280 break; 1281 ++s; 1282 ++size; 1283 } 1284 if (size == MAX_ENV_SIZE) { 1285 printf("## Warning: Input data exceeds %d bytes" 1286 " - truncated\n", MAX_ENV_SIZE); 1287 } 1288 size += 2; 1289 printf("## Info: input data size = %zu = 0x%zX\n", size, size); 1290 } 1291 1292 if (chk) { 1293 uint32_t crc; 1294 env_t *ep = (env_t *)ptr; 1295 1296 size -= offsetof(env_t, data); 1297 memcpy(&crc, &ep->crc, sizeof(crc)); 1298 1299 if (crc32(0, ep->data, size) != crc) { 1300 puts("## Error: bad CRC, import failed\n"); 1301 return 1; 1302 } 1303 ptr = (char *)ep->data; 1304 } 1305 1306 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR, 1307 crlf_is_lf, 0, NULL) == 0) { 1308 pr_err("Environment import failed: errno = %d\n", errno); 1309 return 1; 1310 } 1311 gd->flags |= GD_FLG_ENV_READY; 1312 1313 return 0; 1314 1315 sep_err: 1316 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", 1317 cmd); 1318 return 1; 1319 } 1320 #endif 1321 1322 #if defined(CONFIG_CMD_ENV_EXISTS) 1323 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc, 1324 char * const argv[]) 1325 { 1326 ENTRY e, *ep; 1327 1328 if (argc < 2) 1329 return CMD_RET_USAGE; 1330 1331 e.key = argv[1]; 1332 e.data = NULL; 1333 hsearch_r(e, FIND, &ep, &env_htab, 0); 1334 1335 return (ep == NULL) ? 1 : 0; 1336 } 1337 #endif 1338 1339 /* 1340 * New command line interface: "env" command with subcommands 1341 */ 1342 static cmd_tbl_t cmd_env_sub[] = { 1343 #if defined(CONFIG_CMD_ASKENV) 1344 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""), 1345 #endif 1346 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""), 1347 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""), 1348 #if defined(CONFIG_CMD_EDITENV) 1349 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""), 1350 #endif 1351 #if defined(CONFIG_CMD_ENV_CALLBACK) 1352 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""), 1353 #endif 1354 #if defined(CONFIG_CMD_ENV_FLAGS) 1355 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""), 1356 #endif 1357 #if defined(CONFIG_CMD_EXPORTENV) 1358 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""), 1359 #endif 1360 #if defined(CONFIG_CMD_GREPENV) 1361 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""), 1362 #endif 1363 #if defined(CONFIG_CMD_IMPORTENV) 1364 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""), 1365 #endif 1366 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""), 1367 #if defined(CONFIG_CMD_RUN) 1368 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""), 1369 #endif 1370 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 1371 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""), 1372 #endif 1373 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""), 1374 #if defined(CONFIG_CMD_ENV_EXISTS) 1375 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""), 1376 #endif 1377 }; 1378 1379 #if defined(CONFIG_NEEDS_MANUAL_RELOC) 1380 void env_reloc(void) 1381 { 1382 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub)); 1383 } 1384 #endif 1385 1386 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 1387 { 1388 cmd_tbl_t *cp; 1389 1390 if (argc < 2) 1391 return CMD_RET_USAGE; 1392 1393 /* drop initial "env" arg */ 1394 argc--; 1395 argv++; 1396 1397 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub)); 1398 1399 if (cp) 1400 return cp->cmd(cmdtp, flag, argc, argv); 1401 1402 return CMD_RET_USAGE; 1403 } 1404 1405 #ifdef CONFIG_SYS_LONGHELP 1406 static char env_help_text[] = 1407 #if defined(CONFIG_CMD_ASKENV) 1408 "ask name [message] [size] - ask for environment variable\nenv " 1409 #endif 1410 #if defined(CONFIG_CMD_ENV_CALLBACK) 1411 "callbacks - print callbacks and their associated variables\nenv " 1412 #endif 1413 "default [-f] -a - [forcibly] reset default environment\n" 1414 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n" 1415 "env delete [-f] var [...] - [forcibly] delete variable(s)\n" 1416 #if defined(CONFIG_CMD_EDITENV) 1417 "env edit name - edit environment variable\n" 1418 #endif 1419 #if defined(CONFIG_CMD_ENV_EXISTS) 1420 "env exists name - tests for existence of variable\n" 1421 #endif 1422 #if defined(CONFIG_CMD_EXPORTENV) 1423 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n" 1424 #endif 1425 #if defined(CONFIG_CMD_ENV_FLAGS) 1426 "env flags - print variables that have non-default flags\n" 1427 #endif 1428 #if defined(CONFIG_CMD_GREPENV) 1429 #ifdef CONFIG_REGEX 1430 "env grep [-e] [-n | -v | -b] string [...] - search environment\n" 1431 #else 1432 "env grep [-n | -v | -b] string [...] - search environment\n" 1433 #endif 1434 #endif 1435 #if defined(CONFIG_CMD_IMPORTENV) 1436 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n" 1437 #endif 1438 "env print [-a | name ...] - print environment\n" 1439 #if defined(CONFIG_CMD_RUN) 1440 "env run var [...] - run commands in an environment variable\n" 1441 #endif 1442 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 1443 "env save - save environment\n" 1444 #endif 1445 "env set [-f] name [arg ...]\n"; 1446 #endif 1447 1448 U_BOOT_CMD( 1449 env, CONFIG_SYS_MAXARGS, 1, do_env, 1450 "environment handling commands", env_help_text 1451 ); 1452 1453 /* 1454 * Old command line interface, kept for compatibility 1455 */ 1456 1457 #if defined(CONFIG_CMD_EDITENV) 1458 U_BOOT_CMD_COMPLETE( 1459 editenv, 2, 0, do_env_edit, 1460 "edit environment variable", 1461 "name\n" 1462 " - edit environment variable 'name'", 1463 var_complete 1464 ); 1465 #endif 1466 1467 U_BOOT_CMD_COMPLETE( 1468 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print, 1469 "print environment variables", 1470 "[-a]\n - print [all] values of all environment variables\n" 1471 "printenv name ...\n" 1472 " - print value of environment variable 'name'", 1473 var_complete 1474 ); 1475 1476 #ifdef CONFIG_CMD_GREPENV 1477 U_BOOT_CMD_COMPLETE( 1478 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep, 1479 "search environment variables", 1480 #ifdef CONFIG_REGEX 1481 "[-e] [-n | -v | -b] string ...\n" 1482 #else 1483 "[-n | -v | -b] string ...\n" 1484 #endif 1485 " - list environment name=value pairs matching 'string'\n" 1486 #ifdef CONFIG_REGEX 1487 " \"-e\": enable regular expressions;\n" 1488 #endif 1489 " \"-n\": search variable names; \"-v\": search values;\n" 1490 " \"-b\": search both names and values (default)", 1491 var_complete 1492 ); 1493 #endif 1494 1495 U_BOOT_CMD_COMPLETE( 1496 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set, 1497 "set environment variables", 1498 "[-f] name value ...\n" 1499 " - [forcibly] set environment variable 'name' to 'value ...'\n" 1500 "setenv [-f] name\n" 1501 " - [forcibly] delete environment variable 'name'", 1502 var_complete 1503 ); 1504 1505 #if defined(CONFIG_CMD_ASKENV) 1506 1507 U_BOOT_CMD( 1508 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask, 1509 "get environment variables from stdin", 1510 "name [message] [size]\n" 1511 " - get environment variable 'name' from stdin (max 'size' chars)" 1512 ); 1513 #endif 1514 1515 #if defined(CONFIG_CMD_RUN) 1516 U_BOOT_CMD_COMPLETE( 1517 run, CONFIG_SYS_MAXARGS, 1, do_run, 1518 "run commands in an environment variable", 1519 "var [...]\n" 1520 " - run the commands in the environment variable(s) 'var'", 1521 var_complete 1522 ); 1523 #endif 1524 #endif /* CONFIG_SPL_BUILD */ 1525