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_IN_BLK_DEV) && \ 56 !defined(CONFIG_ENV_IS_NOWHERE) 57 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\ 58 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI|BLK_DEV} or CONFIG_ENV_IS_NOWHERE 59 #endif 60 61 /* 62 * Maximum expected input data size for import command 63 */ 64 #define MAX_ENV_SIZE (1 << 20) /* 1 MiB */ 65 66 /* 67 * This variable is incremented on each do_env_set(), so it can 68 * be used via get_env_id() as an indication, if the environment 69 * has changed or not. So it is possible to reread an environment 70 * variable only if the environment was changed ... done so for 71 * example in NetInitLoop() 72 */ 73 static int env_id = 1; 74 75 int get_env_id(void) 76 { 77 return env_id; 78 } 79 80 #ifndef CONFIG_SPL_BUILD 81 /* 82 * Command interface: print one or all environment variables 83 * 84 * Returns 0 in case of error, or length of printed string 85 */ 86 static int env_print(char *name, int flag) 87 { 88 char *res = NULL; 89 ssize_t len; 90 91 if (name) { /* print a single name */ 92 ENTRY e, *ep; 93 94 e.key = name; 95 e.data = NULL; 96 hsearch_r(e, FIND, &ep, &env_htab, flag); 97 if (ep == NULL) 98 return 0; 99 len = printf("%s=%s\n", ep->key, ep->data); 100 return len; 101 } 102 103 /* print whole list */ 104 len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL); 105 106 if (len > 0) { 107 puts(res); 108 free(res); 109 return len; 110 } 111 112 /* should never happen */ 113 printf("## Error: cannot export environment\n"); 114 return 0; 115 } 116 117 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc, 118 char * const argv[]) 119 { 120 int i; 121 int rcode = 0; 122 int env_flag = H_HIDE_DOT; 123 124 if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') { 125 argc--; 126 argv++; 127 env_flag &= ~H_HIDE_DOT; 128 } 129 130 if (argc == 1) { 131 /* print all env vars */ 132 rcode = env_print(NULL, env_flag); 133 if (!rcode) 134 return 1; 135 printf("\nEnvironment size: %d/%ld bytes\n", 136 rcode, (ulong)ENV_SIZE); 137 return 0; 138 } 139 140 /* print selected env vars */ 141 env_flag &= ~H_HIDE_DOT; 142 for (i = 1; i < argc; ++i) { 143 int rc = env_print(argv[i], env_flag); 144 if (!rc) { 145 printf("## Error: \"%s\" not defined\n", argv[i]); 146 ++rcode; 147 } 148 } 149 150 return rcode; 151 } 152 153 #ifdef CONFIG_CMD_GREPENV 154 static int do_env_grep(cmd_tbl_t *cmdtp, int flag, 155 int argc, char * const argv[]) 156 { 157 char *res = NULL; 158 int len, grep_how, grep_what; 159 160 if (argc < 2) 161 return CMD_RET_USAGE; 162 163 grep_how = H_MATCH_SUBSTR; /* default: substring search */ 164 grep_what = H_MATCH_BOTH; /* default: grep names and values */ 165 166 while (--argc > 0 && **++argv == '-') { 167 char *arg = *argv; 168 while (*++arg) { 169 switch (*arg) { 170 #ifdef CONFIG_REGEX 171 case 'e': /* use regex matching */ 172 grep_how = H_MATCH_REGEX; 173 break; 174 #endif 175 case 'n': /* grep for name */ 176 grep_what = H_MATCH_KEY; 177 break; 178 case 'v': /* grep for value */ 179 grep_what = H_MATCH_DATA; 180 break; 181 case 'b': /* grep for both */ 182 grep_what = H_MATCH_BOTH; 183 break; 184 case '-': 185 goto DONE; 186 default: 187 return CMD_RET_USAGE; 188 } 189 } 190 } 191 192 DONE: 193 len = hexport_r(&env_htab, '\n', 194 flag | grep_what | grep_how, 195 &res, 0, argc, argv); 196 197 if (len > 0) { 198 puts(res); 199 free(res); 200 } 201 202 if (len < 2) 203 return 1; 204 205 return 0; 206 } 207 #endif 208 #endif /* CONFIG_SPL_BUILD */ 209 210 /* 211 * Set a new environment variable, 212 * or replace or delete an existing one. 213 */ 214 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag) 215 { 216 int i, len; 217 char *name, *value, *s; 218 ENTRY e, *ep; 219 220 debug("Initial value for argc=%d\n", argc); 221 while (argc > 1 && **(argv + 1) == '-') { 222 char *arg = *++argv; 223 224 --argc; 225 while (*++arg) { 226 switch (*arg) { 227 case 'f': /* force */ 228 env_flag |= H_FORCE; 229 break; 230 default: 231 return CMD_RET_USAGE; 232 } 233 } 234 } 235 debug("Final value for argc=%d\n", argc); 236 name = argv[1]; 237 238 if (strchr(name, '=')) { 239 printf("## Error: illegal character '='" 240 "in variable name \"%s\"\n", name); 241 return 1; 242 } 243 244 env_id++; 245 246 /* Delete only ? */ 247 if (argc < 3 || argv[2] == NULL) { 248 int rc = hdelete_r(name, &env_htab, env_flag); 249 return !rc; 250 } 251 252 /* 253 * Insert / replace new value 254 */ 255 for (i = 2, len = 0; i < argc; ++i) 256 len += strlen(argv[i]) + 1; 257 258 value = malloc(len); 259 if (value == NULL) { 260 printf("## Can't malloc %d bytes\n", len); 261 return 1; 262 } 263 for (i = 2, s = value; i < argc; ++i) { 264 char *v = argv[i]; 265 266 while ((*s++ = *v++) != '\0') 267 ; 268 *(s - 1) = ' '; 269 } 270 if (s != value) 271 *--s = '\0'; 272 273 e.key = name; 274 e.data = value; 275 hsearch_r(e, ENTER, &ep, &env_htab, env_flag); 276 free(value); 277 if (!ep) { 278 printf("## Error inserting \"%s\" variable, errno=%d\n", 279 name, errno); 280 return 1; 281 } 282 283 return 0; 284 } 285 286 int env_set(const char *varname, const char *varvalue) 287 { 288 const char * const argv[4] = { "setenv", varname, varvalue, NULL }; 289 290 /* before import into hashtable */ 291 if (!(gd->flags & GD_FLG_ENV_READY)) 292 return 1; 293 294 if (varvalue == NULL || varvalue[0] == '\0') 295 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC); 296 else 297 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC); 298 } 299 300 static int env_append(const char *varname, const char *varvalue) 301 { 302 int len = 0; 303 char *oldvalue, *newvalue; 304 305 debug("%s: varvalue = %s\n", __func__, varvalue); 306 307 /* before import into hashtable */ 308 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 309 return 1; 310 311 if (env_exist(varname, varvalue)) 312 return 0; 313 314 debug("%s: reall append: %s\n", __func__, varvalue); 315 316 if (varvalue) 317 len += strlen(varvalue); 318 319 oldvalue = env_get(varname); 320 if (oldvalue) 321 len += strlen(oldvalue); 322 323 newvalue = malloc(len + 2); 324 if (!newvalue) { 325 printf("Error: malloc in %s failed!\n", __func__); 326 return 1; 327 } 328 329 *newvalue = '\0'; 330 331 if (oldvalue) { 332 strcpy(newvalue, oldvalue); 333 strcat(newvalue, " "); 334 } 335 336 if (varvalue) 337 strcat(newvalue, varvalue); 338 339 debug("%s: newvalue: %s\n", __func__, newvalue); 340 env_set(varname, newvalue); 341 free(newvalue); 342 343 return 0; 344 } 345 346 static int env_replace(const char *varname, const char *substr, 347 const char *replacement) 348 { 349 char *oldvalue, *newvalue, *dst, *sub; 350 int substr_len, replace_len, oldvalue_len, len; 351 352 /* before import into hashtable */ 353 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 354 return 1; 355 356 oldvalue = env_get(varname); 357 if (!oldvalue) 358 return 1; 359 360 sub = strstr(oldvalue, substr); 361 if (!sub) 362 return 1; 363 364 oldvalue_len = strlen(oldvalue) + 1; 365 substr_len = strlen(substr); 366 replace_len = strlen(replacement); 367 368 if (replace_len >= substr_len) 369 len = oldvalue_len + replace_len - substr_len; 370 else 371 len = oldvalue_len + substr_len - replace_len; 372 373 newvalue = malloc(len); 374 if (!newvalue) { 375 printf("Error: malloc in %s failed!\n", __func__); 376 return 1; 377 } 378 379 *newvalue = '\0'; 380 381 /* 382 * Orignal string is splited like format: [str1.. substr str2..] 383 */ 384 385 /* str1.. */ 386 dst = newvalue; 387 dst = strncat(dst, oldvalue, sub - oldvalue); 388 389 /* substr */ 390 dst += sub - oldvalue; 391 dst = strncat(dst, replacement, replace_len); 392 393 /* str2.. */ 394 dst += replace_len; 395 len = oldvalue_len - substr_len - (sub - oldvalue); 396 dst = strncat(dst, sub + substr_len, len); 397 398 env_set(varname, newvalue); 399 free(newvalue); 400 401 return 0; 402 } 403 404 #define ARGS_ITEM_NUM 50 405 406 int env_update_filter(const char *varname, const char *varvalue, 407 const char *ignore) 408 { 409 /* 'a_' means "varargs_'; 'v_' means 'varvalue_' */ 410 char *varargs; 411 char *a_title, *v_title; 412 char *a_string_tok, *a_item_tok = NULL; 413 char *v_string_tok, *v_item_tok = NULL; 414 char *a_item, *a_items[ARGS_ITEM_NUM] = { NULL }; 415 char *v_item, *v_items[ARGS_ITEM_NUM] = { NULL }; 416 bool match = false; 417 int i = 0, j = 0; 418 419 /* Before import into hashtable */ 420 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 421 return 1; 422 423 /* If varname doesn't exist, create it and set varvalue */ 424 varargs = env_get(varname); 425 if (!varargs) { 426 env_set(varname, varvalue); 427 if (ignore && strstr(varvalue, ignore)) 428 env_delete(varname, ignore, 0); 429 return 0; 430 } 431 432 /* Malloc a temporary varargs for strtok */ 433 a_string_tok = strdup(varargs); 434 if (!a_string_tok) { 435 printf("Error: strdup in failed, line=%d\n", __LINE__); 436 return 1; 437 } 438 439 /* Malloc a temporary varvalue for strtok */ 440 v_string_tok = strdup(varvalue); 441 if (!v_string_tok) { 442 free(a_string_tok); 443 printf("Error: strdup in failed, line=%d\n", __LINE__); 444 return 1; 445 } 446 447 /* Splite varargs into items containing "=" by the blank */ 448 a_item = strtok(a_string_tok, " "); 449 while (a_item && i < ARGS_ITEM_NUM) { 450 debug("%s: [a_item %d]: %s\n", __func__, i, a_item); 451 if (strstr(a_item, "=")) 452 a_items[i++] = a_item; 453 a_item = strtok(NULL, " "); 454 } 455 456 /* 457 * Splite varvalue into items containing "=" by the blank. 458 * parse varvalue title, eg: "bootmode=emmc", title is "bootmode" 459 */ 460 v_item = strtok(v_string_tok, " "); 461 while (v_item && j < ARGS_ITEM_NUM) { 462 debug("%s: <v_item %d>: %s ", __func__, j, v_item); 463 464 /* filter ignore string */ 465 if (ignore && strstr(v_item, ignore)) { 466 v_item = strtok(NULL, " "); 467 debug("...ignore\n"); 468 continue; 469 } 470 471 if (strstr(v_item, "=")) { 472 debug("\n"); 473 v_items[j++] = v_item; 474 } else { 475 debug("... do append\n"); 476 env_append(varname, v_item); 477 } 478 479 v_item = strtok(NULL, " "); 480 } 481 482 /* For every v_item, search its title */ 483 for (j = 0; j < ARGS_ITEM_NUM && v_items[j]; j++) { 484 v_item = v_items[j]; 485 /* Malloc a temporary a_item for strtok */ 486 v_item_tok = strdup(v_item); 487 if (!v_item_tok) { 488 printf("Error: strdup in failed, line=%d\n", __LINE__); 489 free(a_string_tok); 490 free(v_string_tok); 491 return 1; 492 } 493 v_title = strtok(v_item_tok, "="); 494 debug("%s: <v_title>: %s\n", __func__, v_title); 495 496 /* For every a_item, search its title */ 497 for (i = 0; i < ARGS_ITEM_NUM && a_items[i]; i++) { 498 a_item = a_items[i]; 499 /* Malloc a temporary a_item for strtok */ 500 a_item_tok = strdup(a_item); 501 if (!a_item_tok) { 502 printf("Error: strdup in failed, line=%d\n", __LINE__); 503 free(a_string_tok); 504 free(v_string_tok); 505 free(v_item_tok); 506 return 1; 507 } 508 509 a_title = strtok(a_item_tok, "="); 510 debug("%s: [a_title]: %s\n", __func__, a_title); 511 if (!strcmp(a_title, v_title)) { 512 /* Find! replace it */ 513 env_replace(varname, a_item, v_item); 514 free(a_item_tok); 515 match = true; 516 break; 517 } 518 free(a_item_tok); 519 } 520 521 /* Not find, just append */ 522 if (!match) { 523 debug("%s: append '%s' to the '%s' end\n", 524 __func__, v_item, varname); 525 env_append(varname, v_item); 526 } 527 match = false; 528 free(v_item_tok); 529 } 530 531 free(v_string_tok); 532 free(a_string_tok); 533 534 return 0; 535 } 536 537 int env_update(const char *varname, const char *varvalue) 538 { 539 return env_update_filter(varname, varvalue, NULL); 540 } 541 542 #define VARVALUE_BUF_SIZE 512 543 544 char *env_exist(const char *varname, const char *varvalue) 545 { 546 int len; 547 char *oldvalue, *p; 548 char buf[VARVALUE_BUF_SIZE]; 549 550 /* before import into hashtable */ 551 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 552 return NULL; 553 554 oldvalue = env_get(varname); 555 if (oldvalue) { 556 if (strlen(varvalue) > VARVALUE_BUF_SIZE) { 557 printf("%s: '%s' is too long than 512\n", 558 __func__, varvalue); 559 return NULL; 560 } 561 562 /* Match middle one ? */ 563 snprintf(buf, VARVALUE_BUF_SIZE, " %s ", varvalue); 564 p = strstr(oldvalue, buf); 565 if (p) { 566 debug("%s: '%s' is already exist in '%s'(middle)\n", 567 __func__, varvalue, varname); 568 return (p + 1); 569 } else { 570 debug("%s: not find in middle one\n", __func__); 571 } 572 573 /* Match last one ? */ 574 snprintf(buf, VARVALUE_BUF_SIZE, " %s", varvalue); 575 p = strstr(oldvalue, buf); 576 if (p) { 577 if (*(p + strlen(varvalue) + 1) == '\0') { 578 debug("%s: '%s' is already exist in '%s'(last)\n", 579 __func__, varvalue, varname); 580 return (p + 1); 581 } 582 } else { 583 debug("%s: not find in last one\n", __func__); 584 } 585 586 /* Match first one ? */ 587 snprintf(buf, VARVALUE_BUF_SIZE, "%s ", varvalue); 588 p = strstr(oldvalue, buf); 589 if (p) { 590 len = strstr(p, " ") - oldvalue; 591 if (len == strlen(varvalue)) { 592 debug("%s: '%s' is already exist in '%s'(first)\n", 593 __func__, varvalue, varname); 594 return p; 595 } 596 } else { 597 debug("%s: not find in first one\n", __func__); 598 } 599 } 600 601 return NULL; 602 } 603 604 int env_delete(const char *varname, const char *varvalue, int complete_match) 605 { 606 const char *str; 607 char *value, *start; 608 609 /* before import into hashtable */ 610 if (!(gd->flags & GD_FLG_ENV_READY) || !varname) 611 return 1; 612 613 value = env_get(varname); 614 if (!value) 615 return 0; 616 617 start = complete_match ? 618 env_exist(varname, varvalue) : strstr(value, varvalue); 619 if (!start) 620 return 0; 621 622 /* varvalue is not the last property */ 623 str = strstr(start, " "); 624 if (str) { 625 /* Terminate, so cmdline can be dest for strcat() */ 626 *start = '\0'; 627 /* +1 to skip white space */ 628 strcat((char *)value, (str + 1)); 629 /* varvalue is the last property */ 630 } else { 631 /* skip white space */ 632 *(start - 1) = '\0'; 633 } 634 635 return 0; 636 } 637 638 /** 639 * Set an environment variable to an integer value 640 * 641 * @param varname Environment variable to set 642 * @param value Value to set it to 643 * @return 0 if ok, 1 on error 644 */ 645 int env_set_ulong(const char *varname, ulong value) 646 { 647 /* TODO: this should be unsigned */ 648 char *str = simple_itoa(value); 649 650 return env_set(varname, str); 651 } 652 653 /** 654 * Set an environment variable to an value in hex 655 * 656 * @param varname Environment variable to set 657 * @param value Value to set it to 658 * @return 0 if ok, 1 on error 659 */ 660 int env_set_hex(const char *varname, ulong value) 661 { 662 char str[19]; 663 664 sprintf(str, "0x%lx", value); 665 return env_set(varname, str); 666 } 667 668 ulong env_get_hex(const char *varname, ulong default_val) 669 { 670 const char *s; 671 ulong value; 672 char *endp; 673 674 s = env_get(varname); 675 if (s) 676 value = simple_strtoul(s, &endp, 16); 677 if (!s || endp == s) 678 return default_val; 679 680 return value; 681 } 682 683 #ifndef CONFIG_SPL_BUILD 684 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 685 { 686 if (argc < 2) 687 return CMD_RET_USAGE; 688 689 return _do_env_set(flag, argc, argv, H_INTERACTIVE); 690 } 691 692 /* 693 * Prompt for environment variable 694 */ 695 #if defined(CONFIG_CMD_ASKENV) 696 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 697 { 698 char message[CONFIG_SYS_CBSIZE]; 699 int i, len, pos, size; 700 char *local_args[4]; 701 char *endptr; 702 703 local_args[0] = argv[0]; 704 local_args[1] = argv[1]; 705 local_args[2] = NULL; 706 local_args[3] = NULL; 707 708 /* 709 * Check the syntax: 710 * 711 * env_ask envname [message1 ...] [size] 712 */ 713 if (argc == 1) 714 return CMD_RET_USAGE; 715 716 /* 717 * We test the last argument if it can be converted 718 * into a decimal number. If yes, we assume it's 719 * the size. Otherwise we echo it as part of the 720 * message. 721 */ 722 i = simple_strtoul(argv[argc - 1], &endptr, 10); 723 if (*endptr != '\0') { /* no size */ 724 size = CONFIG_SYS_CBSIZE - 1; 725 } else { /* size given */ 726 size = i; 727 --argc; 728 } 729 730 if (argc <= 2) { 731 sprintf(message, "Please enter '%s': ", argv[1]); 732 } else { 733 /* env_ask envname message1 ... messagen [size] */ 734 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) { 735 if (pos) 736 message[pos++] = ' '; 737 738 strncpy(message + pos, argv[i], sizeof(message) - pos); 739 pos += strlen(argv[i]); 740 } 741 if (pos < sizeof(message) - 1) { 742 message[pos++] = ' '; 743 message[pos] = '\0'; 744 } else 745 message[CONFIG_SYS_CBSIZE - 1] = '\0'; 746 } 747 748 if (size >= CONFIG_SYS_CBSIZE) 749 size = CONFIG_SYS_CBSIZE - 1; 750 751 if (size <= 0) 752 return 1; 753 754 /* prompt for input */ 755 len = cli_readline(message); 756 757 if (size < len) 758 console_buffer[size] = '\0'; 759 760 len = 2; 761 if (console_buffer[0] != '\0') { 762 local_args[2] = console_buffer; 763 len = 3; 764 } 765 766 /* Continue calling setenv code */ 767 return _do_env_set(flag, len, local_args, H_INTERACTIVE); 768 } 769 #endif 770 771 #if defined(CONFIG_CMD_ENV_CALLBACK) 772 static int print_static_binding(const char *var_name, const char *callback_name, 773 void *priv) 774 { 775 printf("\t%-20s %-20s\n", var_name, callback_name); 776 777 return 0; 778 } 779 780 static int print_active_callback(ENTRY *entry) 781 { 782 struct env_clbk_tbl *clbkp; 783 int i; 784 int num_callbacks; 785 786 if (entry->callback == NULL) 787 return 0; 788 789 /* look up the callback in the linker-list */ 790 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk); 791 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk); 792 i < num_callbacks; 793 i++, clbkp++) { 794 #if defined(CONFIG_NEEDS_MANUAL_RELOC) 795 if (entry->callback == clbkp->callback + gd->reloc_off) 796 #else 797 if (entry->callback == clbkp->callback) 798 #endif 799 break; 800 } 801 802 if (i == num_callbacks) 803 /* this should probably never happen, but just in case... */ 804 printf("\t%-20s %p\n", entry->key, entry->callback); 805 else 806 printf("\t%-20s %-20s\n", entry->key, clbkp->name); 807 808 return 0; 809 } 810 811 /* 812 * Print the callbacks available and what they are bound to 813 */ 814 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 815 { 816 struct env_clbk_tbl *clbkp; 817 int i; 818 int num_callbacks; 819 820 /* Print the available callbacks */ 821 puts("Available callbacks:\n"); 822 puts("\tCallback Name\n"); 823 puts("\t-------------\n"); 824 num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk); 825 for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk); 826 i < num_callbacks; 827 i++, clbkp++) 828 printf("\t%s\n", clbkp->name); 829 puts("\n"); 830 831 /* Print the static bindings that may exist */ 832 puts("Static callback bindings:\n"); 833 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name"); 834 printf("\t%-20s %-20s\n", "-------------", "-------------"); 835 env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL); 836 puts("\n"); 837 838 /* walk through each variable and print the callback if it has one */ 839 puts("Active callback bindings:\n"); 840 printf("\t%-20s %-20s\n", "Variable Name", "Callback Name"); 841 printf("\t%-20s %-20s\n", "-------------", "-------------"); 842 hwalk_r(&env_htab, print_active_callback); 843 return 0; 844 } 845 #endif 846 847 #if defined(CONFIG_CMD_ENV_FLAGS) 848 static int print_static_flags(const char *var_name, const char *flags, 849 void *priv) 850 { 851 enum env_flags_vartype type = env_flags_parse_vartype(flags); 852 enum env_flags_varaccess access = env_flags_parse_varaccess(flags); 853 854 printf("\t%-20s %-20s %-20s\n", var_name, 855 env_flags_get_vartype_name(type), 856 env_flags_get_varaccess_name(access)); 857 858 return 0; 859 } 860 861 static int print_active_flags(ENTRY *entry) 862 { 863 enum env_flags_vartype type; 864 enum env_flags_varaccess access; 865 866 if (entry->flags == 0) 867 return 0; 868 869 type = (enum env_flags_vartype) 870 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK); 871 access = env_flags_parse_varaccess_from_binflags(entry->flags); 872 printf("\t%-20s %-20s %-20s\n", entry->key, 873 env_flags_get_vartype_name(type), 874 env_flags_get_varaccess_name(access)); 875 876 return 0; 877 } 878 879 /* 880 * Print the flags available and what variables have flags 881 */ 882 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 883 { 884 /* Print the available variable types */ 885 printf("Available variable type flags (position %d):\n", 886 ENV_FLAGS_VARTYPE_LOC); 887 puts("\tFlag\tVariable Type Name\n"); 888 puts("\t----\t------------------\n"); 889 env_flags_print_vartypes(); 890 puts("\n"); 891 892 /* Print the available variable access types */ 893 printf("Available variable access flags (position %d):\n", 894 ENV_FLAGS_VARACCESS_LOC); 895 puts("\tFlag\tVariable Access Name\n"); 896 puts("\t----\t--------------------\n"); 897 env_flags_print_varaccess(); 898 puts("\n"); 899 900 /* Print the static flags that may exist */ 901 puts("Static flags:\n"); 902 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type", 903 "Variable Access"); 904 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------", 905 "---------------"); 906 env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL); 907 puts("\n"); 908 909 /* walk through each variable and print the flags if non-default */ 910 puts("Active flags:\n"); 911 printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type", 912 "Variable Access"); 913 printf("\t%-20s %-20s %-20s\n", "-------------", "-------------", 914 "---------------"); 915 hwalk_r(&env_htab, print_active_flags); 916 return 0; 917 } 918 #endif 919 920 /* 921 * Interactively edit an environment variable 922 */ 923 #if defined(CONFIG_CMD_EDITENV) 924 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc, 925 char * const argv[]) 926 { 927 char buffer[CONFIG_SYS_CBSIZE]; 928 char *init_val; 929 930 if (argc < 2) 931 return CMD_RET_USAGE; 932 933 /* before import into hashtable */ 934 if (!(gd->flags & GD_FLG_ENV_READY)) 935 return 1; 936 937 /* Set read buffer to initial value or empty sting */ 938 init_val = env_get(argv[1]); 939 if (init_val) 940 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val); 941 else 942 buffer[0] = '\0'; 943 944 if (cli_readline_into_buffer("edit: ", buffer, 0) < 0) 945 return 1; 946 947 if (buffer[0] == '\0') { 948 const char * const _argv[3] = { "setenv", argv[1], NULL }; 949 950 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE); 951 } else { 952 const char * const _argv[4] = { "setenv", argv[1], buffer, 953 NULL }; 954 955 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE); 956 } 957 } 958 #endif /* CONFIG_CMD_EDITENV */ 959 #endif /* CONFIG_SPL_BUILD */ 960 961 /* 962 * Look up variable from environment, 963 * return address of storage for that variable, 964 * or NULL if not found 965 */ 966 char *env_get(const char *name) 967 { 968 if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */ 969 ENTRY e, *ep; 970 971 WATCHDOG_RESET(); 972 973 e.key = name; 974 e.data = NULL; 975 hsearch_r(e, FIND, &ep, &env_htab, 0); 976 977 return ep ? ep->data : NULL; 978 } 979 980 /* restricted capabilities before import */ 981 if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0) 982 return (char *)(gd->env_buf); 983 984 return NULL; 985 } 986 987 /* 988 * Look up variable from environment for restricted C runtime env. 989 */ 990 int env_get_f(const char *name, char *buf, unsigned len) 991 { 992 int i, nxt; 993 994 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) { 995 int val, n; 996 997 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) { 998 if (nxt >= CONFIG_ENV_SIZE) 999 return -1; 1000 } 1001 1002 val = envmatch((uchar *)name, i); 1003 if (val < 0) 1004 continue; 1005 1006 /* found; copy out */ 1007 for (n = 0; n < len; ++n, ++buf) { 1008 *buf = env_get_char(val++); 1009 if (*buf == '\0') 1010 return n; 1011 } 1012 1013 if (n) 1014 *--buf = '\0'; 1015 1016 printf("env_buf [%d bytes] too small for value of \"%s\"\n", 1017 len, name); 1018 1019 return n; 1020 } 1021 1022 return -1; 1023 } 1024 1025 /** 1026 * Decode the integer value of an environment variable and return it. 1027 * 1028 * @param name Name of environemnt variable 1029 * @param base Number base to use (normally 10, or 16 for hex) 1030 * @param default_val Default value to return if the variable is not 1031 * found 1032 * @return the decoded value, or default_val if not found 1033 */ 1034 ulong env_get_ulong(const char *name, int base, ulong default_val) 1035 { 1036 /* 1037 * We can use env_get() here, even before relocation, since the 1038 * environment variable value is an integer and thus short. 1039 */ 1040 const char *str = env_get(name); 1041 1042 return str ? simple_strtoul(str, NULL, base) : default_val; 1043 } 1044 1045 #ifndef CONFIG_SPL_BUILD 1046 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 1047 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, 1048 char * const argv[]) 1049 { 1050 struct env_driver *env = env_driver_lookup_default(); 1051 1052 printf("Saving Environment to %s...\n", env->name); 1053 1054 return env_save() ? 1 : 0; 1055 } 1056 1057 U_BOOT_CMD( 1058 saveenv, 1, 0, do_env_save, 1059 "save environment variables to persistent storage", 1060 "" 1061 ); 1062 #endif 1063 #endif /* CONFIG_SPL_BUILD */ 1064 1065 1066 /* 1067 * Match a name / name=value pair 1068 * 1069 * s1 is either a simple 'name', or a 'name=value' pair. 1070 * i2 is the environment index for a 'name2=value2' pair. 1071 * If the names match, return the index for the value2, else -1. 1072 */ 1073 int envmatch(uchar *s1, int i2) 1074 { 1075 if (s1 == NULL) 1076 return -1; 1077 1078 while (*s1 == env_get_char(i2++)) 1079 if (*s1++ == '=') 1080 return i2; 1081 1082 if (*s1 == '\0' && env_get_char(i2-1) == '=') 1083 return i2; 1084 1085 return -1; 1086 } 1087 1088 #ifndef CONFIG_SPL_BUILD 1089 static int do_env_default(cmd_tbl_t *cmdtp, int __flag, 1090 int argc, char * const argv[]) 1091 { 1092 int all = 0, flag = 0; 1093 1094 debug("Initial value for argc=%d\n", argc); 1095 while (--argc > 0 && **++argv == '-') { 1096 char *arg = *argv; 1097 1098 while (*++arg) { 1099 switch (*arg) { 1100 case 'a': /* default all */ 1101 all = 1; 1102 break; 1103 case 'f': /* force */ 1104 flag |= H_FORCE; 1105 break; 1106 default: 1107 return cmd_usage(cmdtp); 1108 } 1109 } 1110 } 1111 debug("Final value for argc=%d\n", argc); 1112 if (all && (argc == 0)) { 1113 /* Reset the whole environment */ 1114 set_default_env("## Resetting to default environment\n"); 1115 return 0; 1116 } 1117 if (!all && (argc > 0)) { 1118 /* Reset individual variables */ 1119 set_default_vars(argc, argv); 1120 return 0; 1121 } 1122 1123 return cmd_usage(cmdtp); 1124 } 1125 1126 static int do_env_delete(cmd_tbl_t *cmdtp, int flag, 1127 int argc, char * const argv[]) 1128 { 1129 int env_flag = H_INTERACTIVE; 1130 int ret = 0; 1131 1132 debug("Initial value for argc=%d\n", argc); 1133 while (argc > 1 && **(argv + 1) == '-') { 1134 char *arg = *++argv; 1135 1136 --argc; 1137 while (*++arg) { 1138 switch (*arg) { 1139 case 'f': /* force */ 1140 env_flag |= H_FORCE; 1141 break; 1142 default: 1143 return CMD_RET_USAGE; 1144 } 1145 } 1146 } 1147 debug("Final value for argc=%d\n", argc); 1148 1149 env_id++; 1150 1151 while (--argc > 0) { 1152 char *name = *++argv; 1153 1154 if (!hdelete_r(name, &env_htab, env_flag)) 1155 ret = 1; 1156 } 1157 1158 return ret; 1159 } 1160 1161 #ifdef CONFIG_CMD_EXPORTENV 1162 /* 1163 * env export [-t | -b | -c] [-s size] addr [var ...] 1164 * -t: export as text format; if size is given, data will be 1165 * padded with '\0' bytes; if not, one terminating '\0' 1166 * will be added (which is included in the "filesize" 1167 * setting so you can for exmple copy this to flash and 1168 * keep the termination). 1169 * -b: export as binary format (name=value pairs separated by 1170 * '\0', list end marked by double "\0\0") 1171 * -c: export as checksum protected environment format as 1172 * used for example by "saveenv" command 1173 * -s size: 1174 * size of output buffer 1175 * addr: memory address where environment gets stored 1176 * var... List of variable names that get included into the 1177 * export. Without arguments, the whole environment gets 1178 * exported. 1179 * 1180 * With "-c" and size is NOT given, then the export command will 1181 * format the data as currently used for the persistent storage, 1182 * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and 1183 * prepend a valid CRC32 checksum and, in case of redundant 1184 * environment, a "current" redundancy flag. If size is given, this 1185 * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32 1186 * checksum and redundancy flag will be inserted. 1187 * 1188 * With "-b" and "-t", always only the real data (including a 1189 * terminating '\0' byte) will be written; here the optional size 1190 * argument will be used to make sure not to overflow the user 1191 * provided buffer; the command will abort if the size is not 1192 * sufficient. Any remaining space will be '\0' padded. 1193 * 1194 * On successful return, the variable "filesize" will be set. 1195 * Note that filesize includes the trailing/terminating '\0' byte(s). 1196 * 1197 * Usage scenario: create a text snapshot/backup of the current settings: 1198 * 1199 * => env export -t 100000 1200 * => era ${backup_addr} +${filesize} 1201 * => cp.b 100000 ${backup_addr} ${filesize} 1202 * 1203 * Re-import this snapshot, deleting all other settings: 1204 * 1205 * => env import -d -t ${backup_addr} 1206 */ 1207 static int do_env_export(cmd_tbl_t *cmdtp, int flag, 1208 int argc, char * const argv[]) 1209 { 1210 char buf[32]; 1211 ulong addr; 1212 char *ptr, *cmd, *res; 1213 size_t size = 0; 1214 ssize_t len; 1215 env_t *envp; 1216 char sep = '\n'; 1217 int chk = 0; 1218 int fmt = 0; 1219 1220 cmd = *argv; 1221 1222 while (--argc > 0 && **++argv == '-') { 1223 char *arg = *argv; 1224 while (*++arg) { 1225 switch (*arg) { 1226 case 'b': /* raw binary format */ 1227 if (fmt++) 1228 goto sep_err; 1229 sep = '\0'; 1230 break; 1231 case 'c': /* external checksum format */ 1232 if (fmt++) 1233 goto sep_err; 1234 sep = '\0'; 1235 chk = 1; 1236 break; 1237 case 's': /* size given */ 1238 if (--argc <= 0) 1239 return cmd_usage(cmdtp); 1240 size = simple_strtoul(*++argv, NULL, 16); 1241 goto NXTARG; 1242 case 't': /* text format */ 1243 if (fmt++) 1244 goto sep_err; 1245 sep = '\n'; 1246 break; 1247 default: 1248 return CMD_RET_USAGE; 1249 } 1250 } 1251 NXTARG: ; 1252 } 1253 1254 if (argc < 1) 1255 return CMD_RET_USAGE; 1256 1257 addr = simple_strtoul(argv[0], NULL, 16); 1258 ptr = map_sysmem(addr, size); 1259 1260 if (size) 1261 memset(ptr, '\0', size); 1262 1263 argc--; 1264 argv++; 1265 1266 if (sep) { /* export as text file */ 1267 len = hexport_r(&env_htab, sep, 1268 H_MATCH_KEY | H_MATCH_IDENT, 1269 &ptr, size, argc, argv); 1270 if (len < 0) { 1271 pr_err("Cannot export environment: errno = %d\n", errno); 1272 return 1; 1273 } 1274 sprintf(buf, "%zX", (size_t)len); 1275 env_set("filesize", buf); 1276 1277 return 0; 1278 } 1279 1280 envp = (env_t *)ptr; 1281 1282 if (chk) /* export as checksum protected block */ 1283 res = (char *)envp->data; 1284 else /* export as raw binary data */ 1285 res = ptr; 1286 1287 len = hexport_r(&env_htab, '\0', 1288 H_MATCH_KEY | H_MATCH_IDENT, 1289 &res, ENV_SIZE, argc, argv); 1290 if (len < 0) { 1291 pr_err("Cannot export environment: errno = %d\n", errno); 1292 return 1; 1293 } 1294 1295 if (chk) { 1296 envp->crc = crc32(0, envp->data, ENV_SIZE); 1297 #ifdef CONFIG_ENV_ADDR_REDUND 1298 envp->flags = ACTIVE_FLAG; 1299 #endif 1300 } 1301 env_set_hex("filesize", len + offsetof(env_t, data)); 1302 1303 return 0; 1304 1305 sep_err: 1306 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", cmd); 1307 return 1; 1308 } 1309 #endif 1310 1311 #ifdef CONFIG_CMD_IMPORTENV 1312 /* 1313 * env import [-d] [-t [-r] | -b | -c] addr [size] 1314 * -d: delete existing environment before importing; 1315 * otherwise overwrite / append to existing definitions 1316 * -t: assume text format; either "size" must be given or the 1317 * text data must be '\0' terminated 1318 * -r: handle CRLF like LF, that means exported variables with 1319 * a content which ends with \r won't get imported. Used 1320 * to import text files created with editors which are using CRLF 1321 * for line endings. Only effective in addition to -t. 1322 * -b: assume binary format ('\0' separated, "\0\0" terminated) 1323 * -c: assume checksum protected environment format 1324 * addr: memory address to read from 1325 * size: length of input data; if missing, proper '\0' 1326 * termination is mandatory 1327 */ 1328 static int do_env_import(cmd_tbl_t *cmdtp, int flag, 1329 int argc, char * const argv[]) 1330 { 1331 ulong addr; 1332 char *cmd, *ptr; 1333 char sep = '\n'; 1334 int chk = 0; 1335 int fmt = 0; 1336 int del = 0; 1337 int crlf_is_lf = 0; 1338 size_t size; 1339 1340 cmd = *argv; 1341 1342 while (--argc > 0 && **++argv == '-') { 1343 char *arg = *argv; 1344 while (*++arg) { 1345 switch (*arg) { 1346 case 'b': /* raw binary format */ 1347 if (fmt++) 1348 goto sep_err; 1349 sep = '\0'; 1350 break; 1351 case 'c': /* external checksum format */ 1352 if (fmt++) 1353 goto sep_err; 1354 sep = '\0'; 1355 chk = 1; 1356 break; 1357 case 't': /* text format */ 1358 if (fmt++) 1359 goto sep_err; 1360 sep = '\n'; 1361 break; 1362 case 'r': /* handle CRLF like LF */ 1363 crlf_is_lf = 1; 1364 break; 1365 case 'd': 1366 del = 1; 1367 break; 1368 default: 1369 return CMD_RET_USAGE; 1370 } 1371 } 1372 } 1373 1374 if (argc < 1) 1375 return CMD_RET_USAGE; 1376 1377 if (!fmt) 1378 printf("## Warning: defaulting to text format\n"); 1379 1380 if (sep != '\n' && crlf_is_lf ) 1381 crlf_is_lf = 0; 1382 1383 addr = simple_strtoul(argv[0], NULL, 16); 1384 ptr = map_sysmem(addr, 0); 1385 1386 if (argc == 2) { 1387 size = simple_strtoul(argv[1], NULL, 16); 1388 } else if (argc == 1 && chk) { 1389 puts("## Error: external checksum format must pass size\n"); 1390 return CMD_RET_FAILURE; 1391 } else { 1392 char *s = ptr; 1393 1394 size = 0; 1395 1396 while (size < MAX_ENV_SIZE) { 1397 if ((*s == sep) && (*(s+1) == '\0')) 1398 break; 1399 ++s; 1400 ++size; 1401 } 1402 if (size == MAX_ENV_SIZE) { 1403 printf("## Warning: Input data exceeds %d bytes" 1404 " - truncated\n", MAX_ENV_SIZE); 1405 } 1406 size += 2; 1407 printf("## Info: input data size = %zu = 0x%zX\n", size, size); 1408 } 1409 1410 if (chk) { 1411 uint32_t crc; 1412 env_t *ep = (env_t *)ptr; 1413 1414 size -= offsetof(env_t, data); 1415 memcpy(&crc, &ep->crc, sizeof(crc)); 1416 1417 if (crc32(0, ep->data, size) != crc) { 1418 puts("## Error: bad CRC, import failed\n"); 1419 return 1; 1420 } 1421 ptr = (char *)ep->data; 1422 } 1423 1424 if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR, 1425 crlf_is_lf, 0, NULL) == 0) { 1426 pr_err("Environment import failed: errno = %d\n", errno); 1427 return 1; 1428 } 1429 gd->flags |= GD_FLG_ENV_READY; 1430 1431 return 0; 1432 1433 sep_err: 1434 printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n", 1435 cmd); 1436 return 1; 1437 } 1438 #endif 1439 1440 #if defined(CONFIG_CMD_ENV_EXISTS) 1441 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc, 1442 char * const argv[]) 1443 { 1444 ENTRY e, *ep; 1445 1446 if (argc < 2) 1447 return CMD_RET_USAGE; 1448 1449 e.key = argv[1]; 1450 e.data = NULL; 1451 hsearch_r(e, FIND, &ep, &env_htab, 0); 1452 1453 return (ep == NULL) ? 1 : 0; 1454 } 1455 #endif 1456 1457 /* 1458 * New command line interface: "env" command with subcommands 1459 */ 1460 static cmd_tbl_t cmd_env_sub[] = { 1461 #if defined(CONFIG_CMD_ASKENV) 1462 U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""), 1463 #endif 1464 U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""), 1465 U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""), 1466 #if defined(CONFIG_CMD_EDITENV) 1467 U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""), 1468 #endif 1469 #if defined(CONFIG_CMD_ENV_CALLBACK) 1470 U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""), 1471 #endif 1472 #if defined(CONFIG_CMD_ENV_FLAGS) 1473 U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""), 1474 #endif 1475 #if defined(CONFIG_CMD_EXPORTENV) 1476 U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""), 1477 #endif 1478 #if defined(CONFIG_CMD_GREPENV) 1479 U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""), 1480 #endif 1481 #if defined(CONFIG_CMD_IMPORTENV) 1482 U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""), 1483 #endif 1484 U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""), 1485 #if defined(CONFIG_CMD_RUN) 1486 U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""), 1487 #endif 1488 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 1489 U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""), 1490 #endif 1491 U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""), 1492 #if defined(CONFIG_CMD_ENV_EXISTS) 1493 U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""), 1494 #endif 1495 }; 1496 1497 #if defined(CONFIG_NEEDS_MANUAL_RELOC) 1498 void env_reloc(void) 1499 { 1500 fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub)); 1501 } 1502 #endif 1503 1504 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 1505 { 1506 cmd_tbl_t *cp; 1507 1508 if (argc < 2) 1509 return CMD_RET_USAGE; 1510 1511 /* drop initial "env" arg */ 1512 argc--; 1513 argv++; 1514 1515 cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub)); 1516 1517 if (cp) 1518 return cp->cmd(cmdtp, flag, argc, argv); 1519 1520 return CMD_RET_USAGE; 1521 } 1522 1523 #ifdef CONFIG_SYS_LONGHELP 1524 static char env_help_text[] = 1525 #if defined(CONFIG_CMD_ASKENV) 1526 "ask name [message] [size] - ask for environment variable\nenv " 1527 #endif 1528 #if defined(CONFIG_CMD_ENV_CALLBACK) 1529 "callbacks - print callbacks and their associated variables\nenv " 1530 #endif 1531 "default [-f] -a - [forcibly] reset default environment\n" 1532 "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n" 1533 "env delete [-f] var [...] - [forcibly] delete variable(s)\n" 1534 #if defined(CONFIG_CMD_EDITENV) 1535 "env edit name - edit environment variable\n" 1536 #endif 1537 #if defined(CONFIG_CMD_ENV_EXISTS) 1538 "env exists name - tests for existence of variable\n" 1539 #endif 1540 #if defined(CONFIG_CMD_EXPORTENV) 1541 "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n" 1542 #endif 1543 #if defined(CONFIG_CMD_ENV_FLAGS) 1544 "env flags - print variables that have non-default flags\n" 1545 #endif 1546 #if defined(CONFIG_CMD_GREPENV) 1547 #ifdef CONFIG_REGEX 1548 "env grep [-e] [-n | -v | -b] string [...] - search environment\n" 1549 #else 1550 "env grep [-n | -v | -b] string [...] - search environment\n" 1551 #endif 1552 #endif 1553 #if defined(CONFIG_CMD_IMPORTENV) 1554 "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n" 1555 #endif 1556 "env print [-a | name ...] - print environment\n" 1557 #if defined(CONFIG_CMD_RUN) 1558 "env run var [...] - run commands in an environment variable\n" 1559 #endif 1560 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE) 1561 "env save - save environment\n" 1562 #endif 1563 "env set [-f] name [arg ...]\n"; 1564 #endif 1565 1566 U_BOOT_CMD( 1567 env, CONFIG_SYS_MAXARGS, 1, do_env, 1568 "environment handling commands", env_help_text 1569 ); 1570 1571 /* 1572 * Old command line interface, kept for compatibility 1573 */ 1574 1575 #if defined(CONFIG_CMD_EDITENV) 1576 U_BOOT_CMD_COMPLETE( 1577 editenv, 2, 0, do_env_edit, 1578 "edit environment variable", 1579 "name\n" 1580 " - edit environment variable 'name'", 1581 var_complete 1582 ); 1583 #endif 1584 1585 U_BOOT_CMD_COMPLETE( 1586 printenv, CONFIG_SYS_MAXARGS, 1, do_env_print, 1587 "print environment variables", 1588 "[-a]\n - print [all] values of all environment variables\n" 1589 "printenv name ...\n" 1590 " - print value of environment variable 'name'", 1591 var_complete 1592 ); 1593 1594 #ifdef CONFIG_CMD_GREPENV 1595 U_BOOT_CMD_COMPLETE( 1596 grepenv, CONFIG_SYS_MAXARGS, 0, do_env_grep, 1597 "search environment variables", 1598 #ifdef CONFIG_REGEX 1599 "[-e] [-n | -v | -b] string ...\n" 1600 #else 1601 "[-n | -v | -b] string ...\n" 1602 #endif 1603 " - list environment name=value pairs matching 'string'\n" 1604 #ifdef CONFIG_REGEX 1605 " \"-e\": enable regular expressions;\n" 1606 #endif 1607 " \"-n\": search variable names; \"-v\": search values;\n" 1608 " \"-b\": search both names and values (default)", 1609 var_complete 1610 ); 1611 #endif 1612 1613 U_BOOT_CMD_COMPLETE( 1614 setenv, CONFIG_SYS_MAXARGS, 0, do_env_set, 1615 "set environment variables", 1616 "[-f] name value ...\n" 1617 " - [forcibly] set environment variable 'name' to 'value ...'\n" 1618 "setenv [-f] name\n" 1619 " - [forcibly] delete environment variable 'name'", 1620 var_complete 1621 ); 1622 1623 #if defined(CONFIG_CMD_ASKENV) 1624 1625 U_BOOT_CMD( 1626 askenv, CONFIG_SYS_MAXARGS, 1, do_env_ask, 1627 "get environment variables from stdin", 1628 "name [message] [size]\n" 1629 " - get environment variable 'name' from stdin (max 'size' chars)" 1630 ); 1631 #endif 1632 1633 #if defined(CONFIG_CMD_RUN) 1634 U_BOOT_CMD_COMPLETE( 1635 run, CONFIG_SYS_MAXARGS, 1, do_run, 1636 "run commands in an environment variable", 1637 "var [...]\n" 1638 " - run the commands in the environment variable(s) 'var'", 1639 var_complete 1640 ); 1641 #endif 1642 #endif /* CONFIG_SPL_BUILD */ 1643