cmd/nvedit.c

   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 <environment.h>
  31 #include <search.h>
  32 #include <errno.h>
  33 #include <malloc.h>
  34 #include <mapmem.h>
  35 #include <watchdog.h>
  36 #include <linux/stddef.h>
  37 #include <asm/byteorder.h>
  38 #include <asm/io.h>
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 #if     defined(CONFIG_ENV_IS_IN_EEPROM)        || \
  43         defined(CONFIG_ENV_IS_IN_FLASH)         || \
  44         defined(CONFIG_ENV_IS_IN_MMC)           || \
  45         defined(CONFIG_ENV_IS_IN_FAT)           || \
  46         defined(CONFIG_ENV_IS_IN_EXT4)          || \
  47         defined(CONFIG_ENV_IS_IN_NAND)          || \
  48         defined(CONFIG_ENV_IS_IN_NVRAM)         || \
  49         defined(CONFIG_ENV_IS_IN_ONENAND)       || \
  50         defined(CONFIG_ENV_IS_IN_SATA)          || \
  51         defined(CONFIG_ENV_IS_IN_SPI_FLASH)     || \
  52         defined(CONFIG_ENV_IS_IN_REMOTE)        || \
  53         defined(CONFIG_ENV_IS_IN_UBI)
  54
  55 #define ENV_IS_IN_DEVICE
  56
  57 #endif
  58
  59 #if     !defined(ENV_IS_IN_DEVICE)              && \
  60         !defined(CONFIG_ENV_IS_NOWHERE)
  61 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
  62 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
  63 #endif
  64
  65 /*
  66  * Maximum expected input data size for import command
  67  */
  68 #define MAX_ENV_SIZE    (1 << 20)       /* 1 MiB */
  69
  70 /*
  71  * This variable is incremented on each do_env_set(), so it can
  72  * be used via get_env_id() as an indication, if the environment
  73  * has changed or not. So it is possible to reread an environment
  74  * variable only if the environment was changed ... done so for
  75  * example in NetInitLoop()
  76  */
  77 static int env_id = 1;
  78
  79 int get_env_id(void)
  80 {
  81         return env_id;
  82 }
  83
  84 #ifndef CONFIG_SPL_BUILD
  85 /*
  86  * Command interface: print one or all environment variables
  87  *
  88  * Returns 0 in case of error, or length of printed string
  89  */
  90 static int env_print(char *name, int flag)
  91 {
  92         char *res = NULL;
  93         ssize_t len;
  94
  95         if (name) {             /* print a single name */
  96                 ENTRY e, *ep;
  97
  98                 e.key = name;
  99                 e.data = NULL;
 100                 hsearch_r(e, FIND, &ep, &env_htab, flag);
 101                 if (ep == NULL)
 102                         return 0;
 103                 len = printf("%s=%s\n", ep->key, ep->data);
 104                 return len;
 105         }
 106
 107         /* print whole list */
 108         len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
 109
 110         if (len > 0) {
 111                 puts(res);
 112                 free(res);
 113                 return len;
 114         }
 115
 116         /* should never happen */
 117         printf("## Error: cannot export environment\n");
 118         return 0;
 119 }
 120
 121 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
 122                         char * const argv[])
 123 {
 124         int i;
 125         int rcode = 0;
 126         int env_flag = H_HIDE_DOT;
 127
 128 #if defined(CONFIG_CMD_NVEDIT_EFI)
 129         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
 130                 return do_env_print_efi(cmdtp, flag, --argc, ++argv);
 131 #endif
 132
 133         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
 134                 argc--;
 135                 argv++;
 136                 env_flag &= ~H_HIDE_DOT;
 137         }
 138
 139         if (argc == 1) {
 140                 /* print all env vars */
 141                 rcode = env_print(NULL, env_flag);
 142                 if (!rcode)
 143                         return 1;
 144                 printf("\nEnvironment size: %d/%ld bytes\n",
 145                         rcode, (ulong)ENV_SIZE);
 146                 return 0;
 147         }
 148
 149         /* print selected env vars */
 150         env_flag &= ~H_HIDE_DOT;
 151         for (i = 1; i < argc; ++i) {
 152                 int rc = env_print(argv[i], env_flag);
 153                 if (!rc) {
 154                         printf("## Error: \"%s\" not defined\n", argv[i]);
 155                         ++rcode;
 156                 }
 157         }
 158
 159         return rcode;
 160 }
 161
 162 #ifdef CONFIG_CMD_GREPENV
 163 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
 164                        int argc, char * const argv[])
 165 {
 166         char *res = NULL;
 167         int len, grep_how, grep_what;
 168
 169         if (argc < 2)
 170                 return CMD_RET_USAGE;
 171
 172         grep_how  = H_MATCH_SUBSTR;     /* default: substring search    */
 173         grep_what = H_MATCH_BOTH;       /* default: grep names and values */
 174
 175         while (--argc > 0 && **++argv == '-') {
 176                 char *arg = *argv;
 177                 while (*++arg) {
 178                         switch (*arg) {
 179 #ifdef CONFIG_REGEX
 180                         case 'e':               /* use regex matching */
 181                                 grep_how  = H_MATCH_REGEX;
 182                                 break;
 183 #endif
 184                         case 'n':               /* grep for name */
 185                                 grep_what = H_MATCH_KEY;
 186                                 break;
 187                         case 'v':               /* grep for value */
 188                                 grep_what = H_MATCH_DATA;
 189                                 break;
 190                         case 'b':               /* grep for both */
 191                                 grep_what = H_MATCH_BOTH;
 192                                 break;
 193                         case '-':
 194                                 goto DONE;
 195                         default:
 196                                 return CMD_RET_USAGE;
 197                         }
 198                 }
 199         }
 200
 201 DONE:
 202         len = hexport_r(&env_htab, '\n',
 203                         flag | grep_what | grep_how,
 204                         &res, 0, argc, argv);
 205
 206         if (len > 0) {
 207                 puts(res);
 208                 free(res);
 209         }
 210
 211         if (len < 2)
 212                 return 1;
 213
 214         return 0;
 215 }
 216 #endif
 217 #endif /* CONFIG_SPL_BUILD */
 218
 219 /*
 220  * Set a new environment variable,
 221  * or replace or delete an existing one.
 222  */
 223 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
 224 {
 225         int   i, len;
 226         char  *name, *value, *s;
 227         ENTRY e, *ep;
 228
 229         debug("Initial value for argc=%d\n", argc);
 230
 231 #if CONFIG_IS_ENABLED(CMD_NVEDIT_EFI)
 232         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
 233                 return do_env_set_efi(NULL, flag, --argc, ++argv);
 234 #endif
 235
 236         while (argc > 1 && **(argv + 1) == '-') {
 237                 char *arg = *++argv;
 238
 239                 --argc;
 240                 while (*++arg) {
 241                         switch (*arg) {
 242                         case 'f':               /* force */
 243                                 env_flag |= H_FORCE;
 244                                 break;
 245                         default:
 246                                 return CMD_RET_USAGE;
 247                         }
 248                 }
 249         }
 250         debug("Final value for argc=%d\n", argc);
 251         name = argv[1];
 252
 253         if (strchr(name, '=')) {
 254                 printf("## Error: illegal character '='"
 255                        "in variable name \"%s\"\n", name);
 256                 return 1;
 257         }
 258
 259         env_id++;
 260
 261         /* Delete only ? */
 262         if (argc < 3 || argv[2] == NULL) {
 263                 int rc = hdelete_r(name, &env_htab, env_flag);
 264                 return !rc;
 265         }
 266
 267         /*
 268          * Insert / replace new value
 269          */
 270         for (i = 2, len = 0; i < argc; ++i)
 271                 len += strlen(argv[i]) + 1;
 272
 273         value = malloc(len);
 274         if (value == NULL) {
 275                 printf("## Can't malloc %d bytes\n", len);
 276                 return 1;
 277         }
 278         for (i = 2, s = value; i < argc; ++i) {
 279                 char *v = argv[i];
 280
 281                 while ((*s++ = *v++) != '\0')
 282                         ;
 283                 *(s - 1) = ' ';
 284         }
 285         if (s != value)
 286                 *--s = '\0';
 287
 288         e.key   = name;
 289         e.data  = value;
 290         hsearch_r(e, ENTER, &ep, &env_htab, env_flag);
 291         free(value);
 292         if (!ep) {
 293                 printf("## Error inserting \"%s\" variable, errno=%d\n",
 294                         name, errno);
 295                 return 1;
 296         }
 297
 298         return 0;
 299 }
 300
 301 int env_set(const char *varname, const char *varvalue)
 302 {
 303         const char * const argv[4] = { "setenv", varname, varvalue, NULL };
 304
 305         /* before import into hashtable */
 306         if (!(gd->flags & GD_FLG_ENV_READY))
 307                 return 1;
 308
 309         if (varvalue == NULL || varvalue[0] == '\0')
 310                 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
 311         else
 312                 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
 313 }
 314
 315 /**
 316  * Set an environment variable to an integer value
 317  *
 318  * @param varname       Environment variable to set
 319  * @param value         Value to set it to
 320  * @return 0 if ok, 1 on error
 321  */
 322 int env_set_ulong(const char *varname, ulong value)
 323 {
 324         /* TODO: this should be unsigned */
 325         char *str = simple_itoa(value);
 326
 327         return env_set(varname, str);
 328 }
 329
 330 /**
 331  * Set an environment variable to an value in hex
 332  *
 333  * @param varname       Environment variable to set
 334  * @param value         Value to set it to
 335  * @return 0 if ok, 1 on error
 336  */
 337 int env_set_hex(const char *varname, ulong value)
 338 {
 339         char str[17];
 340
 341         sprintf(str, "%lx", value);
 342         return env_set(varname, str);
 343 }
 344
 345 ulong env_get_hex(const char *varname, ulong default_val)
 346 {
 347         const char *s;
 348         ulong value;
 349         char *endp;
 350
 351         s = env_get(varname);
 352         if (s)
 353                 value = simple_strtoul(s, &endp, 16);
 354         if (!s || endp == s)
 355                 return default_val;
 356
 357         return value;
 358 }
 359
 360 void eth_parse_enetaddr(const char *addr, uint8_t *enetaddr)
 361 {
 362         char *end;
 363         int i;
 364
 365         for (i = 0; i < 6; ++i) {
 366                 enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
 367                 if (addr)
 368                         addr = (*end) ? end + 1 : end;
 369         }
 370 }
 371
 372 int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr)
 373 {
 374         eth_parse_enetaddr(env_get(name), enetaddr);
 375         return is_valid_ethaddr(enetaddr);
 376 }
 377
 378 int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr)
 379 {
 380         char buf[ARP_HLEN_ASCII + 1];
 381
 382         if (eth_env_get_enetaddr(name, (uint8_t *)buf))
 383                 return -EEXIST;
 384
 385         sprintf(buf, "%pM", enetaddr);
 386
 387         return env_set(name, buf);
 388 }
 389
 390 #ifndef CONFIG_SPL_BUILD
 391 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 392 {
 393         if (argc < 2)
 394                 return CMD_RET_USAGE;
 395
 396         return _do_env_set(flag, argc, argv, H_INTERACTIVE);
 397 }
 398
 399 /*
 400  * Prompt for environment variable
 401  */
 402 #if defined(CONFIG_CMD_ASKENV)
 403 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 404 {
 405         char message[CONFIG_SYS_CBSIZE];
 406         int i, len, pos, size;
 407         char *local_args[4];
 408         char *endptr;
 409
 410         local_args[0] = argv[0];
 411         local_args[1] = argv[1];
 412         local_args[2] = NULL;
 413         local_args[3] = NULL;
 414
 415         /*
 416          * Check the syntax:
 417          *
 418          * env_ask envname [message1 ...] [size]
 419          */
 420         if (argc == 1)
 421                 return CMD_RET_USAGE;
 422
 423         /*
 424          * We test the last argument if it can be converted
 425          * into a decimal number.  If yes, we assume it's
 426          * the size.  Otherwise we echo it as part of the
 427          * message.
 428          */
 429         i = simple_strtoul(argv[argc - 1], &endptr, 10);
 430         if (*endptr != '\0') {                  /* no size */
 431                 size = CONFIG_SYS_CBSIZE - 1;
 432         } else {                                /* size given */
 433                 size = i;
 434                 --argc;
 435         }
 436
 437         if (argc <= 2) {
 438                 sprintf(message, "Please enter '%s': ", argv[1]);
 439         } else {
 440                 /* env_ask envname message1 ... messagen [size] */
 441                 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
 442                         if (pos)
 443                                 message[pos++] = ' ';
 444
 445                         strncpy(message + pos, argv[i], sizeof(message) - pos);
 446                         pos += strlen(argv[i]);
 447                 }
 448                 if (pos < sizeof(message) - 1) {
 449                         message[pos++] = ' ';
 450                         message[pos] = '\0';
 451                 } else
 452                         message[CONFIG_SYS_CBSIZE - 1] = '\0';
 453         }
 454
 455         if (size >= CONFIG_SYS_CBSIZE)
 456                 size = CONFIG_SYS_CBSIZE - 1;
 457
 458         if (size <= 0)
 459                 return 1;
 460
 461         /* prompt for input */
 462         len = cli_readline(message);
 463
 464         if (size < len)
 465                 console_buffer[size] = '\0';
 466
 467         len = 2;
 468         if (console_buffer[0] != '\0') {
 469                 local_args[2] = console_buffer;
 470                 len = 3;
 471         }
 472
 473         /* Continue calling setenv code */
 474         return _do_env_set(flag, len, local_args, H_INTERACTIVE);
 475 }
 476 #endif
 477
 478 #if defined(CONFIG_CMD_ENV_CALLBACK)
 479 static int print_static_binding(const char *var_name, const char *callback_name,
 480                                 void *priv)
 481 {
 482         printf("\t%-20s %-20s\n", var_name, callback_name);
 483
 484         return 0;
 485 }
 486
 487 static int print_active_callback(ENTRY *entry)
 488 {
 489         struct env_clbk_tbl *clbkp;
 490         int i;
 491         int num_callbacks;
 492
 493         if (entry->callback == NULL)
 494                 return 0;
 495
 496         /* look up the callback in the linker-list */
 497         num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
 498         for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
 499              i < num_callbacks;
 500              i++, clbkp++) {
 501 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 502                 if (entry->callback == clbkp->callback + gd->reloc_off)
 503 #else
 504                 if (entry->callback == clbkp->callback)
 505 #endif
 506                         break;
 507         }
 508
 509         if (i == num_callbacks)
 510                 /* this should probably never happen, but just in case... */
 511                 printf("\t%-20s %p\n", entry->key, entry->callback);
 512         else
 513                 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * Print the callbacks available and what they are bound to
 520  */
 521 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 522 {
 523         struct env_clbk_tbl *clbkp;
 524         int i;
 525         int num_callbacks;
 526
 527         /* Print the available callbacks */
 528         puts("Available callbacks:\n");
 529         puts("\tCallback Name\n");
 530         puts("\t-------------\n");
 531         num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
 532         for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
 533              i < num_callbacks;
 534              i++, clbkp++)
 535                 printf("\t%s\n", clbkp->name);
 536         puts("\n");
 537
 538         /* Print the static bindings that may exist */
 539         puts("Static callback bindings:\n");
 540         printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
 541         printf("\t%-20s %-20s\n", "-------------", "-------------");
 542         env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
 543         puts("\n");
 544
 545         /* walk through each variable and print the callback if it has one */
 546         puts("Active callback bindings:\n");
 547         printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
 548         printf("\t%-20s %-20s\n", "-------------", "-------------");
 549         hwalk_r(&env_htab, print_active_callback);
 550         return 0;
 551 }
 552 #endif
 553
 554 #if defined(CONFIG_CMD_ENV_FLAGS)
 555 static int print_static_flags(const char *var_name, const char *flags,
 556                               void *priv)
 557 {
 558         enum env_flags_vartype type = env_flags_parse_vartype(flags);
 559         enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
 560
 561         printf("\t%-20s %-20s %-20s\n", var_name,
 562                 env_flags_get_vartype_name(type),
 563                 env_flags_get_varaccess_name(access));
 564
 565         return 0;
 566 }
 567
 568 static int print_active_flags(ENTRY *entry)
 569 {
 570         enum env_flags_vartype type;
 571         enum env_flags_varaccess access;
 572
 573         if (entry->flags == 0)
 574                 return 0;
 575
 576         type = (enum env_flags_vartype)
 577                 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
 578         access = env_flags_parse_varaccess_from_binflags(entry->flags);
 579         printf("\t%-20s %-20s %-20s\n", entry->key,
 580                 env_flags_get_vartype_name(type),
 581                 env_flags_get_varaccess_name(access));
 582
 583         return 0;
 584 }
 585
 586 /*
 587  * Print the flags available and what variables have flags
 588  */
 589 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 590 {
 591         /* Print the available variable types */
 592         printf("Available variable type flags (position %d):\n",
 593                 ENV_FLAGS_VARTYPE_LOC);
 594         puts("\tFlag\tVariable Type Name\n");
 595         puts("\t----\t------------------\n");
 596         env_flags_print_vartypes();
 597         puts("\n");
 598
 599         /* Print the available variable access types */
 600         printf("Available variable access flags (position %d):\n",
 601                 ENV_FLAGS_VARACCESS_LOC);
 602         puts("\tFlag\tVariable Access Name\n");
 603         puts("\t----\t--------------------\n");
 604         env_flags_print_varaccess();
 605         puts("\n");
 606
 607         /* Print the static flags that may exist */
 608         puts("Static 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         env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
 614         puts("\n");
 615
 616         /* walk through each variable and print the flags if non-default */
 617         puts("Active flags:\n");
 618         printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
 619                 "Variable Access");
 620         printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
 621                 "---------------");
 622         hwalk_r(&env_htab, print_active_flags);
 623         return 0;
 624 }
 625 #endif
 626
 627 /*
 628  * Interactively edit an environment variable
 629  */
 630 #if defined(CONFIG_CMD_EDITENV)
 631 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
 632                        char * const argv[])
 633 {
 634         char buffer[CONFIG_SYS_CBSIZE];
 635         char *init_val;
 636
 637         if (argc < 2)
 638                 return CMD_RET_USAGE;
 639
 640         /* before import into hashtable */
 641         if (!(gd->flags & GD_FLG_ENV_READY))
 642                 return 1;
 643
 644         /* Set read buffer to initial value or empty sting */
 645         init_val = env_get(argv[1]);
 646         if (init_val)
 647                 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
 648         else
 649                 buffer[0] = '\0';
 650
 651         if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
 652                 return 1;
 653
 654         if (buffer[0] == '\0') {
 655                 const char * const _argv[3] = { "setenv", argv[1], NULL };
 656
 657                 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
 658         } else {
 659                 const char * const _argv[4] = { "setenv", argv[1], buffer,
 660                         NULL };
 661
 662                 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
 663         }
 664 }
 665 #endif /* CONFIG_CMD_EDITENV */
 666 #endif /* CONFIG_SPL_BUILD */
 667
 668 /*
 669  * Look up variable from environment,
 670  * return address of storage for that variable,
 671  * or NULL if not found
 672  */
 673 char *env_get(const char *name)
 674 {
 675         if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
 676                 ENTRY e, *ep;
 677
 678                 WATCHDOG_RESET();
 679
 680                 e.key   = name;
 681                 e.data  = NULL;
 682                 hsearch_r(e, FIND, &ep, &env_htab, 0);
 683
 684                 return ep ? ep->data : NULL;
 685         }
 686
 687         /* restricted capabilities before import */
 688         if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
 689                 return (char *)(gd->env_buf);
 690
 691         return NULL;
 692 }
 693
 694 /*
 695  * Look up variable from environment for restricted C runtime env.
 696  */
 697 int env_get_f(const char *name, char *buf, unsigned len)
 698 {
 699         int i, nxt, c;
 700
 701         for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
 702                 int val, n;
 703
 704                 for (nxt = i; (c = env_get_char(nxt)) != '\0'; ++nxt) {
 705                         if (c < 0)
 706                                 return c;
 707                         if (nxt >= CONFIG_ENV_SIZE)
 708                                 return -1;
 709                 }
 710
 711                 val = envmatch((uchar *)name, i);
 712                 if (val < 0)
 713                         continue;
 714
 715                 /* found; copy out */
 716                 for (n = 0; n < len; ++n, ++buf) {
 717                         c = env_get_char(val++);
 718                         if (c < 0)
 719                                 return c;
 720                         *buf = c;
 721                         if (*buf == '\0')
 722                                 return n;
 723                 }
 724
 725                 if (n)
 726                         *--buf = '\0';
 727
 728                 printf("env_buf [%u bytes] too small for value of \"%s\"\n",
 729                        len, name);
 730
 731                 return n;
 732         }
 733
 734         return -1;
 735 }
 736
 737 /**
 738  * Decode the integer value of an environment variable and return it.
 739  *
 740  * @param name          Name of environment variable
 741  * @param base          Number base to use (normally 10, or 16 for hex)
 742  * @param default_val   Default value to return if the variable is not
 743  *                      found
 744  * @return the decoded value, or default_val if not found
 745  */
 746 ulong env_get_ulong(const char *name, int base, ulong default_val)
 747 {
 748         /*
 749          * We can use env_get() here, even before relocation, since the
 750          * environment variable value is an integer and thus short.
 751          */
 752         const char *str = env_get(name);
 753
 754         return str ? simple_strtoul(str, NULL, base) : default_val;
 755 }
 756
 757 #ifndef CONFIG_SPL_BUILD
 758 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
 759 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
 760                        char * const argv[])
 761 {
 762         return env_save() ? 1 : 0;
 763 }
 764
 765 U_BOOT_CMD(
 766         saveenv, 1, 0,  do_env_save,
 767         "save environment variables to persistent storage",
 768         ""
 769 );
 770 #endif
 771 #endif /* CONFIG_SPL_BUILD */
 772
 773
 774 /*
 775  * Match a name / name=value pair
 776  *
 777  * s1 is either a simple 'name', or a 'name=value' pair.
 778  * i2 is the environment index for a 'name2=value2' pair.
 779  * If the names match, return the index for the value2, else -1.
 780  */
 781 int envmatch(uchar *s1, int i2)
 782 {
 783         if (s1 == NULL)
 784                 return -1;
 785
 786         while (*s1 == env_get_char(i2++))
 787                 if (*s1++ == '=')
 788                         return i2;
 789
 790         if (*s1 == '\0' && env_get_char(i2-1) == '=')
 791                 return i2;
 792
 793         return -1;
 794 }
 795
 796 #ifndef CONFIG_SPL_BUILD
 797 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
 798                           int argc, char * const argv[])
 799 {
 800         int all = 0, env_flag = H_INTERACTIVE;
 801
 802         debug("Initial value for argc=%d\n", argc);
 803         while (--argc > 0 && **++argv == '-') {
 804                 char *arg = *argv;
 805
 806                 while (*++arg) {
 807                         switch (*arg) {
 808                         case 'a':               /* default all */
 809                                 all = 1;
 810                                 break;
 811                         case 'f':               /* force */
 812                                 env_flag |= H_FORCE;
 813                                 break;
 814                         default:
 815                                 return cmd_usage(cmdtp);
 816                         }
 817                 }
 818         }
 819         debug("Final value for argc=%d\n", argc);
 820         if (all && (argc == 0)) {
 821                 /* Reset the whole environment */
 822                 set_default_env("## Resetting to default environment\n",
 823                                 env_flag);
 824                 return 0;
 825         }
 826         if (!all && (argc > 0)) {
 827                 /* Reset individual variables */
 828                 set_default_vars(argc, argv, env_flag);
 829                 return 0;
 830         }
 831
 832         return cmd_usage(cmdtp);
 833 }
 834
 835 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
 836                          int argc, char * const argv[])
 837 {
 838         int env_flag = H_INTERACTIVE;
 839         int ret = 0;
 840
 841         debug("Initial value for argc=%d\n", argc);
 842         while (argc > 1 && **(argv + 1) == '-') {
 843                 char *arg = *++argv;
 844
 845                 --argc;
 846                 while (*++arg) {
 847                         switch (*arg) {
 848                         case 'f':               /* force */
 849                                 env_flag |= H_FORCE;
 850                                 break;
 851                         default:
 852                                 return CMD_RET_USAGE;
 853                         }
 854                 }
 855         }
 856         debug("Final value for argc=%d\n", argc);
 857
 858         env_id++;
 859
 860         while (--argc > 0) {
 861                 char *name = *++argv;
 862
 863                 if (!hdelete_r(name, &env_htab, env_flag))
 864                         ret = 1;
 865         }
 866
 867         return ret;
 868 }
 869
 870 #ifdef CONFIG_CMD_EXPORTENV
 871 /*
 872  * env export [-t | -b | -c] [-s size] addr [var ...]
 873  *      -t:     export as text format; if size is given, data will be
 874  *              padded with '\0' bytes; if not, one terminating '\0'
 875  *              will be added (which is included in the "filesize"
 876  *              setting so you can for exmple copy this to flash and
 877  *              keep the termination).
 878  *      -b:     export as binary format (name=value pairs separated by
 879  *              '\0', list end marked by double "\0\0")
 880  *      -c:     export as checksum protected environment format as
 881  *              used for example by "saveenv" command
 882  *      -s size:
 883  *              size of output buffer
 884  *      addr:   memory address where environment gets stored
 885  *      var...  List of variable names that get included into the
 886  *              export. Without arguments, the whole environment gets
 887  *              exported.
 888  *
 889  * With "-c" and size is NOT given, then the export command will
 890  * format the data as currently used for the persistent storage,
 891  * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
 892  * prepend a valid CRC32 checksum and, in case of redundant
 893  * environment, a "current" redundancy flag. If size is given, this
 894  * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
 895  * checksum and redundancy flag will be inserted.
 896  *
 897  * With "-b" and "-t", always only the real data (including a
 898  * terminating '\0' byte) will be written; here the optional size
 899  * argument will be used to make sure not to overflow the user
 900  * provided buffer; the command will abort if the size is not
 901  * sufficient. Any remaining space will be '\0' padded.
 902  *
 903  * On successful return, the variable "filesize" will be set.
 904  * Note that filesize includes the trailing/terminating '\0' byte(s).
 905  *
 906  * Usage scenario:  create a text snapshot/backup of the current settings:
 907  *
 908  *      => env export -t 100000
 909  *      => era ${backup_addr} +${filesize}
 910  *      => cp.b 100000 ${backup_addr} ${filesize}
 911  *
 912  * Re-import this snapshot, deleting all other settings:
 913  *
 914  *      => env import -d -t ${backup_addr}
 915  */
 916 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
 917                          int argc, char * const argv[])
 918 {
 919         char    buf[32];
 920         ulong   addr;
 921         char    *ptr, *cmd, *res;
 922         size_t  size = 0;
 923         ssize_t len;
 924         env_t   *envp;
 925         char    sep = '\n';
 926         int     chk = 0;
 927         int     fmt = 0;
 928
 929         cmd = *argv;
 930
 931         while (--argc > 0 && **++argv == '-') {
 932                 char *arg = *argv;
 933                 while (*++arg) {
 934                         switch (*arg) {
 935                         case 'b':               /* raw binary format */
 936                                 if (fmt++)
 937                                         goto sep_err;
 938                                 sep = '\0';
 939                                 break;
 940                         case 'c':               /* external checksum format */
 941                                 if (fmt++)
 942                                         goto sep_err;
 943                                 sep = '\0';
 944                                 chk = 1;
 945                                 break;
 946                         case 's':               /* size given */
 947                                 if (--argc <= 0)
 948                                         return cmd_usage(cmdtp);
 949                                 size = simple_strtoul(*++argv, NULL, 16);
 950                                 goto NXTARG;
 951                         case 't':               /* text format */
 952                                 if (fmt++)
 953                                         goto sep_err;
 954                                 sep = '\n';
 955                                 break;
 956                         default:
 957                                 return CMD_RET_USAGE;
 958                         }
 959                 }
 960 NXTARG:         ;
 961         }
 962
 963         if (argc < 1)
 964                 return CMD_RET_USAGE;
 965
 966         addr = simple_strtoul(argv[0], NULL, 16);
 967         ptr = map_sysmem(addr, size);
 968
 969         if (size)
 970                 memset(ptr, '\0', size);
 971
 972         argc--;
 973         argv++;
 974
 975         if (sep) {              /* export as text file */
 976                 len = hexport_r(&env_htab, sep,
 977                                 H_MATCH_KEY | H_MATCH_IDENT,
 978                                 &ptr, size, argc, argv);
 979                 if (len < 0) {
 980                         pr_err("## Error: Cannot export environment: errno = %d\n",
 981                                errno);
 982                         return 1;
 983                 }
 984                 sprintf(buf, "%zX", (size_t)len);
 985                 env_set("filesize", buf);
 986
 987                 return 0;
 988         }
 989
 990         envp = (env_t *)ptr;
 991
 992         if (chk)                /* export as checksum protected block */
 993                 res = (char *)envp->data;
 994         else                    /* export as raw binary data */
 995                 res = ptr;
 996
 997         len = hexport_r(&env_htab, '\0',
 998                         H_MATCH_KEY | H_MATCH_IDENT,
 999                         &res, ENV_SIZE, argc, argv);
1000         if (len < 0) {
1001                 pr_err("## Error: Cannot export environment: errno = %d\n",
1002                        errno);
1003                 return 1;
1004         }
1005
1006         if (chk) {
1007                 envp->crc = crc32(0, envp->data,
1008                                 size ? size - offsetof(env_t, data) : ENV_SIZE);
1009 #ifdef CONFIG_ENV_ADDR_REDUND
1010                 envp->flags = ACTIVE_FLAG;
1011 #endif
1012         }
1013         env_set_hex("filesize", len + offsetof(env_t, data));
1014
1015         return 0;
1016
1017 sep_err:
1018         printf("## Error: %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1019                cmd);
1020         return 1;
1021 }
1022 #endif
1023
1024 #ifdef CONFIG_CMD_IMPORTENV
1025 /*
1026  * env import [-d] [-t [-r] | -b | -c] addr [size] [var ...]
1027  *      -d:     delete existing environment before importing if no var is
1028  *              passed; if vars are passed, if one var is in the current
1029  *              environment but not in the environment at addr, delete var from
1030  *              current environment;
1031  *              otherwise overwrite / append to existing definitions
1032  *      -t:     assume text format; either "size" must be given or the
1033  *              text data must be '\0' terminated
1034  *      -r:     handle CRLF like LF, that means exported variables with
1035  *              a content which ends with \r won't get imported. Used
1036  *              to import text files created with editors which are using CRLF
1037  *              for line endings. Only effective in addition to -t.
1038  *      -b:     assume binary format ('\0' separated, "\0\0" terminated)
1039  *      -c:     assume checksum protected environment format
1040  *      addr:   memory address to read from
1041  *      size:   length of input data; if missing, proper '\0'
1042  *              termination is mandatory
1043  *              if var is set and size should be missing (i.e. '\0'
1044  *              termination), set size to '-'
1045  *      var...  List of the names of the only variables that get imported from
1046  *              the environment at address 'addr'. Without arguments, the whole
1047  *              environment gets imported.
1048  */
1049 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
1050                          int argc, char * const argv[])
1051 {
1052         ulong   addr;
1053         char    *cmd, *ptr;
1054         char    sep = '\n';
1055         int     chk = 0;
1056         int     fmt = 0;
1057         int     del = 0;
1058         int     crlf_is_lf = 0;
1059         int     wl = 0;
1060         size_t  size;
1061
1062         cmd = *argv;
1063
1064         while (--argc > 0 && **++argv == '-') {
1065                 char *arg = *argv;
1066                 while (*++arg) {
1067                         switch (*arg) {
1068                         case 'b':               /* raw binary format */
1069                                 if (fmt++)
1070                                         goto sep_err;
1071                                 sep = '\0';
1072                                 break;
1073                         case 'c':               /* external checksum format */
1074                                 if (fmt++)
1075                                         goto sep_err;
1076                                 sep = '\0';
1077                                 chk = 1;
1078                                 break;
1079                         case 't':               /* text format */
1080                                 if (fmt++)
1081                                         goto sep_err;
1082                                 sep = '\n';
1083                                 break;
1084                         case 'r':               /* handle CRLF like LF */
1085                                 crlf_is_lf = 1;
1086                                 break;
1087                         case 'd':
1088                                 del = 1;
1089                                 break;
1090                         default:
1091                                 return CMD_RET_USAGE;
1092                         }
1093                 }
1094         }
1095
1096         if (argc < 1)
1097                 return CMD_RET_USAGE;
1098
1099         if (!fmt)
1100                 printf("## Warning: defaulting to text format\n");
1101
1102         if (sep != '\n' && crlf_is_lf )
1103                 crlf_is_lf = 0;
1104
1105         addr = simple_strtoul(argv[0], NULL, 16);
1106         ptr = map_sysmem(addr, 0);
1107
1108         if (argc >= 2 && strcmp(argv[1], "-")) {
1109                 size = simple_strtoul(argv[1], NULL, 16);
1110         } else if (chk) {
1111                 puts("## Error: external checksum format must pass size\n");
1112                 return CMD_RET_FAILURE;
1113         } else {
1114                 char *s = ptr;
1115
1116                 size = 0;
1117
1118                 while (size < MAX_ENV_SIZE) {
1119                         if ((*s == sep) && (*(s+1) == '\0'))
1120                                 break;
1121                         ++s;
1122                         ++size;
1123                 }
1124                 if (size == MAX_ENV_SIZE) {
1125                         printf("## Warning: Input data exceeds %d bytes"
1126                                 " - truncated\n", MAX_ENV_SIZE);
1127                 }
1128                 size += 2;
1129                 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1130         }
1131
1132         if (argc > 2)
1133                 wl = 1;
1134
1135         if (chk) {
1136                 uint32_t crc;
1137                 env_t *ep = (env_t *)ptr;
1138
1139                 size -= offsetof(env_t, data);
1140                 memcpy(&crc, &ep->crc, sizeof(crc));
1141
1142                 if (crc32(0, ep->data, size) != crc) {
1143                         puts("## Error: bad CRC, import failed\n");
1144                         return 1;
1145                 }
1146                 ptr = (char *)ep->data;
1147         }
1148
1149         if (!himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1150                        crlf_is_lf, wl ? argc - 2 : 0, wl ? &argv[2] : NULL)) {
1151                 pr_err("## Error: Environment import failed: errno = %d\n",
1152                        errno);
1153                 return 1;
1154         }
1155         gd->flags |= GD_FLG_ENV_READY;
1156
1157         return 0;
1158
1159 sep_err:
1160         printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1161                 cmd);
1162         return 1;
1163 }
1164 #endif
1165
1166 #if defined(CONFIG_CMD_ENV_EXISTS)
1167 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1168                        char * const argv[])
1169 {
1170         ENTRY e, *ep;
1171
1172         if (argc < 2)
1173                 return CMD_RET_USAGE;
1174
1175         e.key = argv[1];
1176         e.data = NULL;
1177         hsearch_r(e, FIND, &ep, &env_htab, 0);
1178
1179         return (ep == NULL) ? 1 : 0;
1180 }
1181 #endif
1182
1183 /*
1184  * New command line interface: "env" command with subcommands
1185  */
1186 static cmd_tbl_t cmd_env_sub[] = {
1187 #if defined(CONFIG_CMD_ASKENV)
1188         U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1189 #endif
1190         U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1191         U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1192 #if defined(CONFIG_CMD_EDITENV)
1193         U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1194 #endif
1195 #if defined(CONFIG_CMD_ENV_CALLBACK)
1196         U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1197 #endif
1198 #if defined(CONFIG_CMD_ENV_FLAGS)
1199         U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1200 #endif
1201 #if defined(CONFIG_CMD_EXPORTENV)
1202         U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1203 #endif
1204 #if defined(CONFIG_CMD_GREPENV)
1205         U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1206 #endif
1207 #if defined(CONFIG_CMD_IMPORTENV)
1208         U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1209 #endif
1210         U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1211 #if defined(CONFIG_CMD_RUN)
1212         U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1213 #endif
1214 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1215         U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1216 #endif
1217         U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1218 #if defined(CONFIG_CMD_ENV_EXISTS)
1219         U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1220 #endif
1221 };
1222
1223 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1224 void env_reloc(void)
1225 {
1226         fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1227 }
1228 #endif
1229
1230 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1231 {
1232         cmd_tbl_t *cp;
1233
1234         if (argc < 2)
1235                 return CMD_RET_USAGE;
1236
1237         /* drop initial "env" arg */
1238         argc--;
1239         argv++;
1240
1241         cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1242
1243         if (cp)
1244                 return cp->cmd(cmdtp, flag, argc, argv);
1245
1246         return CMD_RET_USAGE;
1247 }
1248
1249 #ifdef CONFIG_SYS_LONGHELP
1250 static char env_help_text[] =
1251 #if defined(CONFIG_CMD_ASKENV)
1252         "ask name [message] [size] - ask for environment variable\nenv "
1253 #endif
1254 #if defined(CONFIG_CMD_ENV_CALLBACK)
1255         "callbacks - print callbacks and their associated variables\nenv "
1256 #endif
1257         "default [-f] -a - [forcibly] reset default environment\n"
1258         "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1259         "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1260 #if defined(CONFIG_CMD_EDITENV)
1261         "env edit name - edit environment variable\n"
1262 #endif
1263 #if defined(CONFIG_CMD_ENV_EXISTS)
1264         "env exists name - tests for existence of variable\n"
1265 #endif
1266 #if defined(CONFIG_CMD_EXPORTENV)
1267         "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1268 #endif
1269 #if defined(CONFIG_CMD_ENV_FLAGS)
1270         "env flags - print variables that have non-default flags\n"
1271 #endif
1272 #if defined(CONFIG_CMD_GREPENV)
1273 #ifdef CONFIG_REGEX
1274         "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1275 #else
1276         "env grep [-n | -v | -b] string [...] - search environment\n"
1277 #endif
1278 #endif
1279 #if defined(CONFIG_CMD_IMPORTENV)
1280         "env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import environment\n"
1281 #endif
1282         "env print [-a | name ...] - print environment\n"
1283 #if defined(CONFIG_CMD_NVEDIT_EFI)
1284         "env print -e [name ...] - print UEFI environment\n"
1285 #endif
1286 #if defined(CONFIG_CMD_RUN)
1287         "env run var [...] - run commands in an environment variable\n"
1288 #endif
1289 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1290         "env save - save environment\n"
1291 #endif
1292 #if defined(CONFIG_CMD_NVEDIT_EFI)
1293         "env set -e name [arg ...] - set UEFI variable; unset if 'arg' not specified\n"
1294 #endif
1295         "env set [-f] name [arg ...]\n";
1296 #endif
1297
1298 U_BOOT_CMD(
1299         env, CONFIG_SYS_MAXARGS, 1, do_env,
1300         "environment handling commands", env_help_text
1301 );
1302
1303 /*
1304  * Old command line interface, kept for compatibility
1305  */
1306
1307 #if defined(CONFIG_CMD_EDITENV)
1308 U_BOOT_CMD_COMPLETE(
1309         editenv, 2, 0,  do_env_edit,
1310         "edit environment variable",
1311         "name\n"
1312         "    - edit environment variable 'name'",
1313         var_complete
1314 );
1315 #endif
1316
1317 U_BOOT_CMD_COMPLETE(
1318         printenv, CONFIG_SYS_MAXARGS, 1,        do_env_print,
1319         "print environment variables",
1320         "[-a]\n    - print [all] values of all environment variables\n"
1321 #if defined(CONFIG_CMD_NVEDIT_EFI)
1322         "printenv -e [name ...]\n"
1323         "    - print UEFI variable 'name' or all the variables\n"
1324 #endif
1325         "printenv name ...\n"
1326         "    - print value of environment variable 'name'",
1327         var_complete
1328 );
1329
1330 #ifdef CONFIG_CMD_GREPENV
1331 U_BOOT_CMD_COMPLETE(
1332         grepenv, CONFIG_SYS_MAXARGS, 0,  do_env_grep,
1333         "search environment variables",
1334 #ifdef CONFIG_REGEX
1335         "[-e] [-n | -v | -b] string ...\n"
1336 #else
1337         "[-n | -v | -b] string ...\n"
1338 #endif
1339         "    - list environment name=value pairs matching 'string'\n"
1340 #ifdef CONFIG_REGEX
1341         "      \"-e\": enable regular expressions;\n"
1342 #endif
1343         "      \"-n\": search variable names; \"-v\": search values;\n"
1344         "      \"-b\": search both names and values (default)",
1345         var_complete
1346 );
1347 #endif
1348
1349 U_BOOT_CMD_COMPLETE(
1350         setenv, CONFIG_SYS_MAXARGS, 0,  do_env_set,
1351         "set environment variables",
1352 #if defined(CONFIG_CMD_NVEDIT_EFI)
1353         "-e [-nv] name [value ...]\n"
1354         "    - set UEFI variable 'name' to 'value' ...'\n"
1355         "      'nv' option makes the variable non-volatile\n"
1356         "    - delete UEFI variable 'name' if 'value' not specified\n"
1357 #endif
1358         "setenv [-f] name value ...\n"
1359         "    - [forcibly] set environment variable 'name' to 'value ...'\n"
1360         "setenv [-f] name\n"
1361         "    - [forcibly] delete environment variable 'name'",
1362         var_complete
1363 );
1364
1365 #if defined(CONFIG_CMD_ASKENV)
1366
1367 U_BOOT_CMD(
1368         askenv, CONFIG_SYS_MAXARGS,     1,      do_env_ask,
1369         "get environment variables from stdin",
1370         "name [message] [size]\n"
1371         "    - get environment variable 'name' from stdin (max 'size' chars)"
1372 );
1373 #endif
1374
1375 #if defined(CONFIG_CMD_RUN)
1376 U_BOOT_CMD_COMPLETE(
1377         run,    CONFIG_SYS_MAXARGS,     1,      do_run,
1378         "run commands in an environment variable",
1379         "var [...]\n"
1380         "    - run the commands in the environment variable(s) 'var'",
1381         var_complete
1382 );
1383 #endif
1384 #endif /* CONFIG_SPL_BUILD */