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 <env.h>
  31 #include <env_internal.h>
  32 #include <net.h>
  33 #include <search.h>
  34 #include <errno.h>
  35 #include <malloc.h>
  36 #include <mapmem.h>
  37 #include <u-boot/crc.h>
  38 #include <watchdog.h>
  39 #include <linux/stddef.h>
  40 #include <asm/byteorder.h>
  41 #include <asm/io.h>
  42
  43 DECLARE_GLOBAL_DATA_PTR;
  44
  45 #if     defined(CONFIG_ENV_IS_IN_EEPROM)        || \
  46         defined(CONFIG_ENV_IS_IN_FLASH)         || \
  47         defined(CONFIG_ENV_IS_IN_MMC)           || \
  48         defined(CONFIG_ENV_IS_IN_FAT)           || \
  49         defined(CONFIG_ENV_IS_IN_EXT4)          || \
  50         defined(CONFIG_ENV_IS_IN_NAND)          || \
  51         defined(CONFIG_ENV_IS_IN_NVRAM)         || \
  52         defined(CONFIG_ENV_IS_IN_ONENAND)       || \
  53         defined(CONFIG_ENV_IS_IN_SATA)          || \
  54         defined(CONFIG_ENV_IS_IN_SPI_FLASH)     || \
  55         defined(CONFIG_ENV_IS_IN_REMOTE)        || \
  56         defined(CONFIG_ENV_IS_IN_UBI)
  57
  58 #define ENV_IS_IN_DEVICE
  59
  60 #endif
  61
  62 #if     !defined(ENV_IS_IN_DEVICE)              && \
  63         !defined(CONFIG_ENV_IS_NOWHERE)
  64 # error Define one of CONFIG_ENV_IS_IN_{EEPROM|FLASH|MMC|FAT|EXT4|\
  65 NAND|NVRAM|ONENAND|SATA|SPI_FLASH|REMOTE|UBI} or CONFIG_ENV_IS_NOWHERE
  66 #endif
  67
  68 /*
  69  * Maximum expected input data size for import command
  70  */
  71 #define MAX_ENV_SIZE    (1 << 20)       /* 1 MiB */
  72
  73 /*
  74  * This variable is incremented on each do_env_set(), so it can
  75  * be used via env_get_id() as an indication, if the environment
  76  * has changed or not. So it is possible to reread an environment
  77  * variable only if the environment was changed ... done so for
  78  * example in NetInitLoop()
  79  */
  80 static int env_id = 1;
  81
  82 int env_get_id(void)
  83 {
  84         return env_id;
  85 }
  86
  87 #ifndef CONFIG_SPL_BUILD
  88 /*
  89  * Command interface: print one or all environment variables
  90  *
  91  * Returns 0 in case of error, or length of printed string
  92  */
  93 static int env_print(char *name, int flag)
  94 {
  95         char *res = NULL;
  96         ssize_t len;
  97
  98         if (name) {             /* print a single name */
  99                 struct env_entry e, *ep;
 100
 101                 e.key = name;
 102                 e.data = NULL;
 103                 hsearch_r(e, ENV_FIND, &ep, &env_htab, flag);
 104                 if (ep == NULL)
 105                         return 0;
 106                 len = printf("%s=%s\n", ep->key, ep->data);
 107                 return len;
 108         }
 109
 110         /* print whole list */
 111         len = hexport_r(&env_htab, '\n', flag, &res, 0, 0, NULL);
 112
 113         if (len > 0) {
 114                 puts(res);
 115                 free(res);
 116                 return len;
 117         }
 118
 119         /* should never happen */
 120         printf("## Error: cannot export environment\n");
 121         return 0;
 122 }
 123
 124 static int do_env_print(cmd_tbl_t *cmdtp, int flag, int argc,
 125                         char * const argv[])
 126 {
 127         int i;
 128         int rcode = 0;
 129         int env_flag = H_HIDE_DOT;
 130
 131 #if defined(CONFIG_CMD_NVEDIT_EFI)
 132         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
 133                 return do_env_print_efi(cmdtp, flag, --argc, ++argv);
 134 #endif
 135
 136         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'a') {
 137                 argc--;
 138                 argv++;
 139                 env_flag &= ~H_HIDE_DOT;
 140         }
 141
 142         if (argc == 1) {
 143                 /* print all env vars */
 144                 rcode = env_print(NULL, env_flag);
 145                 if (!rcode)
 146                         return 1;
 147                 printf("\nEnvironment size: %d/%ld bytes\n",
 148                         rcode, (ulong)ENV_SIZE);
 149                 return 0;
 150         }
 151
 152         /* print selected env vars */
 153         env_flag &= ~H_HIDE_DOT;
 154         for (i = 1; i < argc; ++i) {
 155                 int rc = env_print(argv[i], env_flag);
 156                 if (!rc) {
 157                         printf("## Error: \"%s\" not defined\n", argv[i]);
 158                         ++rcode;
 159                 }
 160         }
 161
 162         return rcode;
 163 }
 164
 165 #ifdef CONFIG_CMD_GREPENV
 166 static int do_env_grep(cmd_tbl_t *cmdtp, int flag,
 167                        int argc, char * const argv[])
 168 {
 169         char *res = NULL;
 170         int len, grep_how, grep_what;
 171
 172         if (argc < 2)
 173                 return CMD_RET_USAGE;
 174
 175         grep_how  = H_MATCH_SUBSTR;     /* default: substring search    */
 176         grep_what = H_MATCH_BOTH;       /* default: grep names and values */
 177
 178         while (--argc > 0 && **++argv == '-') {
 179                 char *arg = *argv;
 180                 while (*++arg) {
 181                         switch (*arg) {
 182 #ifdef CONFIG_REGEX
 183                         case 'e':               /* use regex matching */
 184                                 grep_how  = H_MATCH_REGEX;
 185                                 break;
 186 #endif
 187                         case 'n':               /* grep for name */
 188                                 grep_what = H_MATCH_KEY;
 189                                 break;
 190                         case 'v':               /* grep for value */
 191                                 grep_what = H_MATCH_DATA;
 192                                 break;
 193                         case 'b':               /* grep for both */
 194                                 grep_what = H_MATCH_BOTH;
 195                                 break;
 196                         case '-':
 197                                 goto DONE;
 198                         default:
 199                                 return CMD_RET_USAGE;
 200                         }
 201                 }
 202         }
 203
 204 DONE:
 205         len = hexport_r(&env_htab, '\n',
 206                         flag | grep_what | grep_how,
 207                         &res, 0, argc, argv);
 208
 209         if (len > 0) {
 210                 puts(res);
 211                 free(res);
 212         }
 213
 214         if (len < 2)
 215                 return 1;
 216
 217         return 0;
 218 }
 219 #endif
 220 #endif /* CONFIG_SPL_BUILD */
 221
 222 /*
 223  * Set a new environment variable,
 224  * or replace or delete an existing one.
 225  */
 226 static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
 227 {
 228         int   i, len;
 229         char  *name, *value, *s;
 230         struct env_entry e, *ep;
 231
 232         debug("Initial value for argc=%d\n", argc);
 233
 234 #if CONFIG_IS_ENABLED(CMD_NVEDIT_EFI)
 235         if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'e')
 236                 return do_env_set_efi(NULL, flag, --argc, ++argv);
 237 #endif
 238
 239         while (argc > 1 && **(argv + 1) == '-') {
 240                 char *arg = *++argv;
 241
 242                 --argc;
 243                 while (*++arg) {
 244                         switch (*arg) {
 245                         case 'f':               /* force */
 246                                 env_flag |= H_FORCE;
 247                                 break;
 248                         default:
 249                                 return CMD_RET_USAGE;
 250                         }
 251                 }
 252         }
 253         debug("Final value for argc=%d\n", argc);
 254         name = argv[1];
 255
 256         if (strchr(name, '=')) {
 257                 printf("## Error: illegal character '='"
 258                        "in variable name \"%s\"\n", name);
 259                 return 1;
 260         }
 261
 262         env_id++;
 263
 264         /* Delete only ? */
 265         if (argc < 3 || argv[2] == NULL) {
 266                 int rc = hdelete_r(name, &env_htab, env_flag);
 267                 return !rc;
 268         }
 269
 270         /*
 271          * Insert / replace new value
 272          */
 273         for (i = 2, len = 0; i < argc; ++i)
 274                 len += strlen(argv[i]) + 1;
 275
 276         value = malloc(len);
 277         if (value == NULL) {
 278                 printf("## Can't malloc %d bytes\n", len);
 279                 return 1;
 280         }
 281         for (i = 2, s = value; i < argc; ++i) {
 282                 char *v = argv[i];
 283
 284                 while ((*s++ = *v++) != '\0')
 285                         ;
 286                 *(s - 1) = ' ';
 287         }
 288         if (s != value)
 289                 *--s = '\0';
 290
 291         e.key   = name;
 292         e.data  = value;
 293         hsearch_r(e, ENV_ENTER, &ep, &env_htab, env_flag);
 294         free(value);
 295         if (!ep) {
 296                 printf("## Error inserting \"%s\" variable, errno=%d\n",
 297                         name, errno);
 298                 return 1;
 299         }
 300
 301         return 0;
 302 }
 303
 304 int env_set(const char *varname, const char *varvalue)
 305 {
 306         const char * const argv[4] = { "setenv", varname, varvalue, NULL };
 307
 308         /* before import into hashtable */
 309         if (!(gd->flags & GD_FLG_ENV_READY))
 310                 return 1;
 311
 312         if (varvalue == NULL || varvalue[0] == '\0')
 313                 return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
 314         else
 315                 return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
 316 }
 317
 318 /**
 319  * Set an environment variable to an integer value
 320  *
 321  * @param varname       Environment variable to set
 322  * @param value         Value to set it to
 323  * @return 0 if ok, 1 on error
 324  */
 325 int env_set_ulong(const char *varname, ulong value)
 326 {
 327         /* TODO: this should be unsigned */
 328         char *str = simple_itoa(value);
 329
 330         return env_set(varname, str);
 331 }
 332
 333 /**
 334  * Set an environment variable to an value in hex
 335  *
 336  * @param varname       Environment variable to set
 337  * @param value         Value to set it to
 338  * @return 0 if ok, 1 on error
 339  */
 340 int env_set_hex(const char *varname, ulong value)
 341 {
 342         char str[17];
 343
 344         sprintf(str, "%lx", value);
 345         return env_set(varname, str);
 346 }
 347
 348 ulong env_get_hex(const char *varname, ulong default_val)
 349 {
 350         const char *s;
 351         ulong value;
 352         char *endp;
 353
 354         s = env_get(varname);
 355         if (s)
 356                 value = simple_strtoul(s, &endp, 16);
 357         if (!s || endp == s)
 358                 return default_val;
 359
 360         return value;
 361 }
 362
 363 int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr)
 364 {
 365         string_to_enetaddr(env_get(name), enetaddr);
 366         return is_valid_ethaddr(enetaddr);
 367 }
 368
 369 int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr)
 370 {
 371         char buf[ARP_HLEN_ASCII + 1];
 372
 373         if (eth_env_get_enetaddr(name, (uint8_t *)buf))
 374                 return -EEXIST;
 375
 376         sprintf(buf, "%pM", enetaddr);
 377
 378         return env_set(name, buf);
 379 }
 380
 381 #ifndef CONFIG_SPL_BUILD
 382 static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 383 {
 384         if (argc < 2)
 385                 return CMD_RET_USAGE;
 386
 387         return _do_env_set(flag, argc, argv, H_INTERACTIVE);
 388 }
 389
 390 /*
 391  * Prompt for environment variable
 392  */
 393 #if defined(CONFIG_CMD_ASKENV)
 394 int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 395 {
 396         char message[CONFIG_SYS_CBSIZE];
 397         int i, len, pos, size;
 398         char *local_args[4];
 399         char *endptr;
 400
 401         local_args[0] = argv[0];
 402         local_args[1] = argv[1];
 403         local_args[2] = NULL;
 404         local_args[3] = NULL;
 405
 406         /*
 407          * Check the syntax:
 408          *
 409          * env_ask envname [message1 ...] [size]
 410          */
 411         if (argc == 1)
 412                 return CMD_RET_USAGE;
 413
 414         /*
 415          * We test the last argument if it can be converted
 416          * into a decimal number.  If yes, we assume it's
 417          * the size.  Otherwise we echo it as part of the
 418          * message.
 419          */
 420         i = simple_strtoul(argv[argc - 1], &endptr, 10);
 421         if (*endptr != '\0') {                  /* no size */
 422                 size = CONFIG_SYS_CBSIZE - 1;
 423         } else {                                /* size given */
 424                 size = i;
 425                 --argc;
 426         }
 427
 428         if (argc <= 2) {
 429                 sprintf(message, "Please enter '%s': ", argv[1]);
 430         } else {
 431                 /* env_ask envname message1 ... messagen [size] */
 432                 for (i = 2, pos = 0; i < argc && pos+1 < sizeof(message); i++) {
 433                         if (pos)
 434                                 message[pos++] = ' ';
 435
 436                         strncpy(message + pos, argv[i], sizeof(message) - pos);
 437                         pos += strlen(argv[i]);
 438                 }
 439                 if (pos < sizeof(message) - 1) {
 440                         message[pos++] = ' ';
 441                         message[pos] = '\0';
 442                 } else
 443                         message[CONFIG_SYS_CBSIZE - 1] = '\0';
 444         }
 445
 446         if (size >= CONFIG_SYS_CBSIZE)
 447                 size = CONFIG_SYS_CBSIZE - 1;
 448
 449         if (size <= 0)
 450                 return 1;
 451
 452         /* prompt for input */
 453         len = cli_readline(message);
 454
 455         if (size < len)
 456                 console_buffer[size] = '\0';
 457
 458         len = 2;
 459         if (console_buffer[0] != '\0') {
 460                 local_args[2] = console_buffer;
 461                 len = 3;
 462         }
 463
 464         /* Continue calling setenv code */
 465         return _do_env_set(flag, len, local_args, H_INTERACTIVE);
 466 }
 467 #endif
 468
 469 #if defined(CONFIG_CMD_ENV_CALLBACK)
 470 static int print_static_binding(const char *var_name, const char *callback_name,
 471                                 void *priv)
 472 {
 473         printf("\t%-20s %-20s\n", var_name, callback_name);
 474
 475         return 0;
 476 }
 477
 478 static int print_active_callback(struct env_entry *entry)
 479 {
 480         struct env_clbk_tbl *clbkp;
 481         int i;
 482         int num_callbacks;
 483
 484         if (entry->callback == NULL)
 485                 return 0;
 486
 487         /* look up the callback in the linker-list */
 488         num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
 489         for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
 490              i < num_callbacks;
 491              i++, clbkp++) {
 492 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 493                 if (entry->callback == clbkp->callback + gd->reloc_off)
 494 #else
 495                 if (entry->callback == clbkp->callback)
 496 #endif
 497                         break;
 498         }
 499
 500         if (i == num_callbacks)
 501                 /* this should probably never happen, but just in case... */
 502                 printf("\t%-20s %p\n", entry->key, entry->callback);
 503         else
 504                 printf("\t%-20s %-20s\n", entry->key, clbkp->name);
 505
 506         return 0;
 507 }
 508
 509 /*
 510  * Print the callbacks available and what they are bound to
 511  */
 512 int do_env_callback(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 513 {
 514         struct env_clbk_tbl *clbkp;
 515         int i;
 516         int num_callbacks;
 517
 518         /* Print the available callbacks */
 519         puts("Available callbacks:\n");
 520         puts("\tCallback Name\n");
 521         puts("\t-------------\n");
 522         num_callbacks = ll_entry_count(struct env_clbk_tbl, env_clbk);
 523         for (i = 0, clbkp = ll_entry_start(struct env_clbk_tbl, env_clbk);
 524              i < num_callbacks;
 525              i++, clbkp++)
 526                 printf("\t%s\n", clbkp->name);
 527         puts("\n");
 528
 529         /* Print the static bindings that may exist */
 530         puts("Static callback bindings:\n");
 531         printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
 532         printf("\t%-20s %-20s\n", "-------------", "-------------");
 533         env_attr_walk(ENV_CALLBACK_LIST_STATIC, print_static_binding, NULL);
 534         puts("\n");
 535
 536         /* walk through each variable and print the callback if it has one */
 537         puts("Active callback bindings:\n");
 538         printf("\t%-20s %-20s\n", "Variable Name", "Callback Name");
 539         printf("\t%-20s %-20s\n", "-------------", "-------------");
 540         hwalk_r(&env_htab, print_active_callback);
 541         return 0;
 542 }
 543 #endif
 544
 545 #if defined(CONFIG_CMD_ENV_FLAGS)
 546 static int print_static_flags(const char *var_name, const char *flags,
 547                               void *priv)
 548 {
 549         enum env_flags_vartype type = env_flags_parse_vartype(flags);
 550         enum env_flags_varaccess access = env_flags_parse_varaccess(flags);
 551
 552         printf("\t%-20s %-20s %-20s\n", var_name,
 553                 env_flags_get_vartype_name(type),
 554                 env_flags_get_varaccess_name(access));
 555
 556         return 0;
 557 }
 558
 559 static int print_active_flags(struct env_entry *entry)
 560 {
 561         enum env_flags_vartype type;
 562         enum env_flags_varaccess access;
 563
 564         if (entry->flags == 0)
 565                 return 0;
 566
 567         type = (enum env_flags_vartype)
 568                 (entry->flags & ENV_FLAGS_VARTYPE_BIN_MASK);
 569         access = env_flags_parse_varaccess_from_binflags(entry->flags);
 570         printf("\t%-20s %-20s %-20s\n", entry->key,
 571                 env_flags_get_vartype_name(type),
 572                 env_flags_get_varaccess_name(access));
 573
 574         return 0;
 575 }
 576
 577 /*
 578  * Print the flags available and what variables have flags
 579  */
 580 int do_env_flags(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 581 {
 582         /* Print the available variable types */
 583         printf("Available variable type flags (position %d):\n",
 584                 ENV_FLAGS_VARTYPE_LOC);
 585         puts("\tFlag\tVariable Type Name\n");
 586         puts("\t----\t------------------\n");
 587         env_flags_print_vartypes();
 588         puts("\n");
 589
 590         /* Print the available variable access types */
 591         printf("Available variable access flags (position %d):\n",
 592                 ENV_FLAGS_VARACCESS_LOC);
 593         puts("\tFlag\tVariable Access Name\n");
 594         puts("\t----\t--------------------\n");
 595         env_flags_print_varaccess();
 596         puts("\n");
 597
 598         /* Print the static flags that may exist */
 599         puts("Static flags:\n");
 600         printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
 601                 "Variable Access");
 602         printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
 603                 "---------------");
 604         env_attr_walk(ENV_FLAGS_LIST_STATIC, print_static_flags, NULL);
 605         puts("\n");
 606
 607         /* walk through each variable and print the flags if non-default */
 608         puts("Active flags:\n");
 609         printf("\t%-20s %-20s %-20s\n", "Variable Name", "Variable Type",
 610                 "Variable Access");
 611         printf("\t%-20s %-20s %-20s\n", "-------------", "-------------",
 612                 "---------------");
 613         hwalk_r(&env_htab, print_active_flags);
 614         return 0;
 615 }
 616 #endif
 617
 618 /*
 619  * Interactively edit an environment variable
 620  */
 621 #if defined(CONFIG_CMD_EDITENV)
 622 static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
 623                        char * const argv[])
 624 {
 625         char buffer[CONFIG_SYS_CBSIZE];
 626         char *init_val;
 627
 628         if (argc < 2)
 629                 return CMD_RET_USAGE;
 630
 631         /* before import into hashtable */
 632         if (!(gd->flags & GD_FLG_ENV_READY))
 633                 return 1;
 634
 635         /* Set read buffer to initial value or empty sting */
 636         init_val = env_get(argv[1]);
 637         if (init_val)
 638                 snprintf(buffer, CONFIG_SYS_CBSIZE, "%s", init_val);
 639         else
 640                 buffer[0] = '\0';
 641
 642         if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
 643                 return 1;
 644
 645         if (buffer[0] == '\0') {
 646                 const char * const _argv[3] = { "setenv", argv[1], NULL };
 647
 648                 return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
 649         } else {
 650                 const char * const _argv[4] = { "setenv", argv[1], buffer,
 651                         NULL };
 652
 653                 return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
 654         }
 655 }
 656 #endif /* CONFIG_CMD_EDITENV */
 657 #endif /* CONFIG_SPL_BUILD */
 658
 659 /*
 660  * Look up variable from environment,
 661  * return address of storage for that variable,
 662  * or NULL if not found
 663  */
 664 char *env_get(const char *name)
 665 {
 666         if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
 667                 struct env_entry e, *ep;
 668
 669                 WATCHDOG_RESET();
 670
 671                 e.key   = name;
 672                 e.data  = NULL;
 673                 hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
 674
 675                 return ep ? ep->data : NULL;
 676         }
 677
 678         /* restricted capabilities before import */
 679         if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
 680                 return (char *)(gd->env_buf);
 681
 682         return NULL;
 683 }
 684
 685 /*
 686  * Like env_get, but prints an error if envvar isn't defined in the
 687  * environment.  It always returns what env_get does, so it can be used in
 688  * place of env_get without changing error handling otherwise.
 689  */
 690 char *from_env(const char *envvar)
 691 {
 692         char *ret;
 693
 694         ret = env_get(envvar);
 695
 696         if (!ret)
 697                 printf("missing environment variable: %s\n", envvar);
 698
 699         return ret;
 700 }
 701
 702 /*
 703  * Look up variable from environment for restricted C runtime env.
 704  */
 705 int env_get_f(const char *name, char *buf, unsigned len)
 706 {
 707         int i, nxt, c;
 708
 709         for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
 710                 int val, n;
 711
 712                 for (nxt = i; (c = env_get_char(nxt)) != '\0'; ++nxt) {
 713                         if (c < 0)
 714                                 return c;
 715                         if (nxt >= CONFIG_ENV_SIZE)
 716                                 return -1;
 717                 }
 718
 719                 val = env_match((uchar *)name, i);
 720                 if (val < 0)
 721                         continue;
 722
 723                 /* found; copy out */
 724                 for (n = 0; n < len; ++n, ++buf) {
 725                         c = env_get_char(val++);
 726                         if (c < 0)
 727                                 return c;
 728                         *buf = c;
 729                         if (*buf == '\0')
 730                                 return n;
 731                 }
 732
 733                 if (n)
 734                         *--buf = '\0';
 735
 736                 printf("env_buf [%u bytes] too small for value of \"%s\"\n",
 737                        len, name);
 738
 739                 return n;
 740         }
 741
 742         return -1;
 743 }
 744
 745 /**
 746  * Decode the integer value of an environment variable and return it.
 747  *
 748  * @param name          Name of environment variable
 749  * @param base          Number base to use (normally 10, or 16 for hex)
 750  * @param default_val   Default value to return if the variable is not
 751  *                      found
 752  * @return the decoded value, or default_val if not found
 753  */
 754 ulong env_get_ulong(const char *name, int base, ulong default_val)
 755 {
 756         /*
 757          * We can use env_get() here, even before relocation, since the
 758          * environment variable value is an integer and thus short.
 759          */
 760         const char *str = env_get(name);
 761
 762         return str ? simple_strtoul(str, NULL, base) : default_val;
 763 }
 764
 765 #ifndef CONFIG_SPL_BUILD
 766 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
 767 static int do_env_save(cmd_tbl_t *cmdtp, int flag, int argc,
 768                        char * const argv[])
 769 {
 770         return env_save() ? 1 : 0;
 771 }
 772
 773 U_BOOT_CMD(
 774         saveenv, 1, 0,  do_env_save,
 775         "save environment variables to persistent storage",
 776         ""
 777 );
 778
 779 #if defined(CONFIG_CMD_ERASEENV)
 780 static int do_env_erase(cmd_tbl_t *cmdtp, int flag, int argc,
 781                         char * const argv[])
 782 {
 783         return env_erase() ? 1 : 0;
 784 }
 785
 786 U_BOOT_CMD(
 787         eraseenv, 1, 0, do_env_erase,
 788         "erase environment variables from persistent storage",
 789         ""
 790 );
 791 #endif
 792 #endif
 793 #endif /* CONFIG_SPL_BUILD */
 794
 795 int env_match(uchar *s1, int i2)
 796 {
 797         if (s1 == NULL)
 798                 return -1;
 799
 800         while (*s1 == env_get_char(i2++))
 801                 if (*s1++ == '=')
 802                         return i2;
 803
 804         if (*s1 == '\0' && env_get_char(i2-1) == '=')
 805                 return i2;
 806
 807         return -1;
 808 }
 809
 810 #ifndef CONFIG_SPL_BUILD
 811 static int do_env_default(cmd_tbl_t *cmdtp, int flag,
 812                           int argc, char * const argv[])
 813 {
 814         int all = 0, env_flag = H_INTERACTIVE;
 815
 816         debug("Initial value for argc=%d\n", argc);
 817         while (--argc > 0 && **++argv == '-') {
 818                 char *arg = *argv;
 819
 820                 while (*++arg) {
 821                         switch (*arg) {
 822                         case 'a':               /* default all */
 823                                 all = 1;
 824                                 break;
 825                         case 'f':               /* force */
 826                                 env_flag |= H_FORCE;
 827                                 break;
 828                         default:
 829                                 return cmd_usage(cmdtp);
 830                         }
 831                 }
 832         }
 833         debug("Final value for argc=%d\n", argc);
 834         if (all && (argc == 0)) {
 835                 /* Reset the whole environment */
 836                 env_set_default("## Resetting to default environment\n",
 837                                 env_flag);
 838                 return 0;
 839         }
 840         if (!all && (argc > 0)) {
 841                 /* Reset individual variables */
 842                 env_set_default_vars(argc, argv, env_flag);
 843                 return 0;
 844         }
 845
 846         return cmd_usage(cmdtp);
 847 }
 848
 849 static int do_env_delete(cmd_tbl_t *cmdtp, int flag,
 850                          int argc, char * const argv[])
 851 {
 852         int env_flag = H_INTERACTIVE;
 853         int ret = 0;
 854
 855         debug("Initial value for argc=%d\n", argc);
 856         while (argc > 1 && **(argv + 1) == '-') {
 857                 char *arg = *++argv;
 858
 859                 --argc;
 860                 while (*++arg) {
 861                         switch (*arg) {
 862                         case 'f':               /* force */
 863                                 env_flag |= H_FORCE;
 864                                 break;
 865                         default:
 866                                 return CMD_RET_USAGE;
 867                         }
 868                 }
 869         }
 870         debug("Final value for argc=%d\n", argc);
 871
 872         env_id++;
 873
 874         while (--argc > 0) {
 875                 char *name = *++argv;
 876
 877                 if (!hdelete_r(name, &env_htab, env_flag))
 878                         ret = 1;
 879         }
 880
 881         return ret;
 882 }
 883
 884 #ifdef CONFIG_CMD_EXPORTENV
 885 /*
 886  * env export [-t | -b | -c] [-s size] addr [var ...]
 887  *      -t:     export as text format; if size is given, data will be
 888  *              padded with '\0' bytes; if not, one terminating '\0'
 889  *              will be added (which is included in the "filesize"
 890  *              setting so you can for exmple copy this to flash and
 891  *              keep the termination).
 892  *      -b:     export as binary format (name=value pairs separated by
 893  *              '\0', list end marked by double "\0\0")
 894  *      -c:     export as checksum protected environment format as
 895  *              used for example by "saveenv" command
 896  *      -s size:
 897  *              size of output buffer
 898  *      addr:   memory address where environment gets stored
 899  *      var...  List of variable names that get included into the
 900  *              export. Without arguments, the whole environment gets
 901  *              exported.
 902  *
 903  * With "-c" and size is NOT given, then the export command will
 904  * format the data as currently used for the persistent storage,
 905  * i. e. it will use CONFIG_ENV_SECT_SIZE as output block size and
 906  * prepend a valid CRC32 checksum and, in case of redundant
 907  * environment, a "current" redundancy flag. If size is given, this
 908  * value will be used instead of CONFIG_ENV_SECT_SIZE; again, CRC32
 909  * checksum and redundancy flag will be inserted.
 910  *
 911  * With "-b" and "-t", always only the real data (including a
 912  * terminating '\0' byte) will be written; here the optional size
 913  * argument will be used to make sure not to overflow the user
 914  * provided buffer; the command will abort if the size is not
 915  * sufficient. Any remaining space will be '\0' padded.
 916  *
 917  * On successful return, the variable "filesize" will be set.
 918  * Note that filesize includes the trailing/terminating '\0' byte(s).
 919  *
 920  * Usage scenario:  create a text snapshot/backup of the current settings:
 921  *
 922  *      => env export -t 100000
 923  *      => era ${backup_addr} +${filesize}
 924  *      => cp.b 100000 ${backup_addr} ${filesize}
 925  *
 926  * Re-import this snapshot, deleting all other settings:
 927  *
 928  *      => env import -d -t ${backup_addr}
 929  */
 930 static int do_env_export(cmd_tbl_t *cmdtp, int flag,
 931                          int argc, char * const argv[])
 932 {
 933         char    buf[32];
 934         ulong   addr;
 935         char    *ptr, *cmd, *res;
 936         size_t  size = 0;
 937         ssize_t len;
 938         env_t   *envp;
 939         char    sep = '\n';
 940         int     chk = 0;
 941         int     fmt = 0;
 942
 943         cmd = *argv;
 944
 945         while (--argc > 0 && **++argv == '-') {
 946                 char *arg = *argv;
 947                 while (*++arg) {
 948                         switch (*arg) {
 949                         case 'b':               /* raw binary format */
 950                                 if (fmt++)
 951                                         goto sep_err;
 952                                 sep = '\0';
 953                                 break;
 954                         case 'c':               /* external checksum format */
 955                                 if (fmt++)
 956                                         goto sep_err;
 957                                 sep = '\0';
 958                                 chk = 1;
 959                                 break;
 960                         case 's':               /* size given */
 961                                 if (--argc <= 0)
 962                                         return cmd_usage(cmdtp);
 963                                 size = simple_strtoul(*++argv, NULL, 16);
 964                                 goto NXTARG;
 965                         case 't':               /* text format */
 966                                 if (fmt++)
 967                                         goto sep_err;
 968                                 sep = '\n';
 969                                 break;
 970                         default:
 971                                 return CMD_RET_USAGE;
 972                         }
 973                 }
 974 NXTARG:         ;
 975         }
 976
 977         if (argc < 1)
 978                 return CMD_RET_USAGE;
 979
 980         addr = simple_strtoul(argv[0], NULL, 16);
 981         ptr = map_sysmem(addr, size);
 982
 983         if (size)
 984                 memset(ptr, '\0', size);
 985
 986         argc--;
 987         argv++;
 988
 989         if (sep) {              /* export as text file */
 990                 len = hexport_r(&env_htab, sep,
 991                                 H_MATCH_KEY | H_MATCH_IDENT,
 992                                 &ptr, size, argc, argv);
 993                 if (len < 0) {
 994                         pr_err("## Error: Cannot export environment: errno = %d\n",
 995                                errno);
 996                         return 1;
 997                 }
 998                 sprintf(buf, "%zX", (size_t)len);
 999                 env_set("filesize", buf);
1000
1001                 return 0;
1002         }
1003
1004         envp = (env_t *)ptr;
1005
1006         if (chk)                /* export as checksum protected block */
1007                 res = (char *)envp->data;
1008         else                    /* export as raw binary data */
1009                 res = ptr;
1010
1011         len = hexport_r(&env_htab, '\0',
1012                         H_MATCH_KEY | H_MATCH_IDENT,
1013                         &res, ENV_SIZE, argc, argv);
1014         if (len < 0) {
1015                 pr_err("## Error: Cannot export environment: errno = %d\n",
1016                        errno);
1017                 return 1;
1018         }
1019
1020         if (chk) {
1021                 envp->crc = crc32(0, envp->data,
1022                                 size ? size - offsetof(env_t, data) : ENV_SIZE);
1023 #ifdef CONFIG_ENV_ADDR_REDUND
1024                 envp->flags = ENV_REDUND_ACTIVE;
1025 #endif
1026         }
1027         env_set_hex("filesize", len + offsetof(env_t, data));
1028
1029         return 0;
1030
1031 sep_err:
1032         printf("## Error: %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1033                cmd);
1034         return 1;
1035 }
1036 #endif
1037
1038 #ifdef CONFIG_CMD_IMPORTENV
1039 /*
1040  * env import [-d] [-t [-r] | -b | -c] addr [size] [var ...]
1041  *      -d:     delete existing environment before importing if no var is
1042  *              passed; if vars are passed, if one var is in the current
1043  *              environment but not in the environment at addr, delete var from
1044  *              current environment;
1045  *              otherwise overwrite / append to existing definitions
1046  *      -t:     assume text format; either "size" must be given or the
1047  *              text data must be '\0' terminated
1048  *      -r:     handle CRLF like LF, that means exported variables with
1049  *              a content which ends with \r won't get imported. Used
1050  *              to import text files created with editors which are using CRLF
1051  *              for line endings. Only effective in addition to -t.
1052  *      -b:     assume binary format ('\0' separated, "\0\0" terminated)
1053  *      -c:     assume checksum protected environment format
1054  *      addr:   memory address to read from
1055  *      size:   length of input data; if missing, proper '\0'
1056  *              termination is mandatory
1057  *              if var is set and size should be missing (i.e. '\0'
1058  *              termination), set size to '-'
1059  *      var...  List of the names of the only variables that get imported from
1060  *              the environment at address 'addr'. Without arguments, the whole
1061  *              environment gets imported.
1062  */
1063 static int do_env_import(cmd_tbl_t *cmdtp, int flag,
1064                          int argc, char * const argv[])
1065 {
1066         ulong   addr;
1067         char    *cmd, *ptr;
1068         char    sep = '\n';
1069         int     chk = 0;
1070         int     fmt = 0;
1071         int     del = 0;
1072         int     crlf_is_lf = 0;
1073         int     wl = 0;
1074         size_t  size;
1075
1076         cmd = *argv;
1077
1078         while (--argc > 0 && **++argv == '-') {
1079                 char *arg = *argv;
1080                 while (*++arg) {
1081                         switch (*arg) {
1082                         case 'b':               /* raw binary format */
1083                                 if (fmt++)
1084                                         goto sep_err;
1085                                 sep = '\0';
1086                                 break;
1087                         case 'c':               /* external checksum format */
1088                                 if (fmt++)
1089                                         goto sep_err;
1090                                 sep = '\0';
1091                                 chk = 1;
1092                                 break;
1093                         case 't':               /* text format */
1094                                 if (fmt++)
1095                                         goto sep_err;
1096                                 sep = '\n';
1097                                 break;
1098                         case 'r':               /* handle CRLF like LF */
1099                                 crlf_is_lf = 1;
1100                                 break;
1101                         case 'd':
1102                                 del = 1;
1103                                 break;
1104                         default:
1105                                 return CMD_RET_USAGE;
1106                         }
1107                 }
1108         }
1109
1110         if (argc < 1)
1111                 return CMD_RET_USAGE;
1112
1113         if (!fmt)
1114                 printf("## Warning: defaulting to text format\n");
1115
1116         if (sep != '\n' && crlf_is_lf )
1117                 crlf_is_lf = 0;
1118
1119         addr = simple_strtoul(argv[0], NULL, 16);
1120         ptr = map_sysmem(addr, 0);
1121
1122         if (argc >= 2 && strcmp(argv[1], "-")) {
1123                 size = simple_strtoul(argv[1], NULL, 16);
1124         } else if (chk) {
1125                 puts("## Error: external checksum format must pass size\n");
1126                 return CMD_RET_FAILURE;
1127         } else {
1128                 char *s = ptr;
1129
1130                 size = 0;
1131
1132                 while (size < MAX_ENV_SIZE) {
1133                         if ((*s == sep) && (*(s+1) == '\0'))
1134                                 break;
1135                         ++s;
1136                         ++size;
1137                 }
1138                 if (size == MAX_ENV_SIZE) {
1139                         printf("## Warning: Input data exceeds %d bytes"
1140                                 " - truncated\n", MAX_ENV_SIZE);
1141                 }
1142                 size += 2;
1143                 printf("## Info: input data size = %zu = 0x%zX\n", size, size);
1144         }
1145
1146         if (argc > 2)
1147                 wl = 1;
1148
1149         if (chk) {
1150                 uint32_t crc;
1151                 env_t *ep = (env_t *)ptr;
1152
1153                 size -= offsetof(env_t, data);
1154                 memcpy(&crc, &ep->crc, sizeof(crc));
1155
1156                 if (crc32(0, ep->data, size) != crc) {
1157                         puts("## Error: bad CRC, import failed\n");
1158                         return 1;
1159                 }
1160                 ptr = (char *)ep->data;
1161         }
1162
1163         if (!himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
1164                        crlf_is_lf, wl ? argc - 2 : 0, wl ? &argv[2] : NULL)) {
1165                 pr_err("## Error: Environment import failed: errno = %d\n",
1166                        errno);
1167                 return 1;
1168         }
1169         gd->flags |= GD_FLG_ENV_READY;
1170
1171         return 0;
1172
1173 sep_err:
1174         printf("## %s: only one of \"-b\", \"-c\" or \"-t\" allowed\n",
1175                 cmd);
1176         return 1;
1177 }
1178 #endif
1179
1180 #if defined(CONFIG_CMD_NVEDIT_INFO)
1181 /*
1182  * print_env_info - print environment information
1183  */
1184 static int print_env_info(void)
1185 {
1186         const char *value;
1187
1188         /* print environment validity value */
1189         switch (gd->env_valid) {
1190         case ENV_INVALID:
1191                 value = "invalid";
1192                 break;
1193         case ENV_VALID:
1194                 value = "valid";
1195                 break;
1196         case ENV_REDUND:
1197                 value = "redundant";
1198                 break;
1199         default:
1200                 value = "unknown";
1201                 break;
1202         }
1203         printf("env_valid = %s\n", value);
1204
1205         /* print environment ready flag */
1206         value = gd->flags & GD_FLG_ENV_READY ? "true" : "false";
1207         printf("env_ready = %s\n", value);
1208
1209         /* print environment using default flag */
1210         value = gd->flags & GD_FLG_ENV_DEFAULT ? "true" : "false";
1211         printf("env_use_default = %s\n", value);
1212
1213         return CMD_RET_SUCCESS;
1214 }
1215
1216 #define ENV_INFO_IS_DEFAULT     BIT(0) /* default environment bit mask */
1217 #define ENV_INFO_IS_PERSISTED   BIT(1) /* environment persistence bit mask */
1218
1219 /*
1220  * env info - display environment information
1221  * env info [-d] - evaluate whether default environment is used
1222  * env info [-p] - evaluate whether environment can be persisted
1223  */
1224 static int do_env_info(cmd_tbl_t *cmdtp, int flag,
1225                        int argc, char * const argv[])
1226 {
1227         int eval_flags = 0;
1228         int eval_results = 0;
1229
1230         /* display environment information */
1231         if (argc <= 1)
1232                 return print_env_info();
1233
1234         /* process options */
1235         while (--argc > 0 && **++argv == '-') {
1236                 char *arg = *argv;
1237
1238                 while (*++arg) {
1239                         switch (*arg) {
1240                         case 'd':
1241                                 eval_flags |= ENV_INFO_IS_DEFAULT;
1242                                 break;
1243                         case 'p':
1244                                 eval_flags |= ENV_INFO_IS_PERSISTED;
1245                                 break;
1246                         default:
1247                                 return CMD_RET_USAGE;
1248                         }
1249                 }
1250         }
1251
1252         /* evaluate whether default environment is used */
1253         if (eval_flags & ENV_INFO_IS_DEFAULT) {
1254                 if (gd->flags & GD_FLG_ENV_DEFAULT) {
1255                         printf("Default environment is used\n");
1256                         eval_results |= ENV_INFO_IS_DEFAULT;
1257                 } else {
1258                         printf("Environment was loaded from persistent storage\n");
1259                 }
1260         }
1261
1262         /* evaluate whether environment can be persisted */
1263         if (eval_flags & ENV_INFO_IS_PERSISTED) {
1264 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_ENV_IS_NOWHERE)
1265                 printf("Environment can be persisted\n");
1266                 eval_results |= ENV_INFO_IS_PERSISTED;
1267 #else
1268                 printf("Environment cannot be persisted\n");
1269 #endif
1270         }
1271
1272         /* The result of evaluations is combined with AND */
1273         if (eval_flags != eval_results)
1274                 return CMD_RET_FAILURE;
1275
1276         return CMD_RET_SUCCESS;
1277 }
1278 #endif
1279
1280 #if defined(CONFIG_CMD_ENV_EXISTS)
1281 static int do_env_exists(cmd_tbl_t *cmdtp, int flag, int argc,
1282                        char * const argv[])
1283 {
1284         struct env_entry e, *ep;
1285
1286         if (argc < 2)
1287                 return CMD_RET_USAGE;
1288
1289         e.key = argv[1];
1290         e.data = NULL;
1291         hsearch_r(e, ENV_FIND, &ep, &env_htab, 0);
1292
1293         return (ep == NULL) ? 1 : 0;
1294 }
1295 #endif
1296
1297 /*
1298  * New command line interface: "env" command with subcommands
1299  */
1300 static cmd_tbl_t cmd_env_sub[] = {
1301 #if defined(CONFIG_CMD_ASKENV)
1302         U_BOOT_CMD_MKENT(ask, CONFIG_SYS_MAXARGS, 1, do_env_ask, "", ""),
1303 #endif
1304         U_BOOT_CMD_MKENT(default, 1, 0, do_env_default, "", ""),
1305         U_BOOT_CMD_MKENT(delete, CONFIG_SYS_MAXARGS, 0, do_env_delete, "", ""),
1306 #if defined(CONFIG_CMD_EDITENV)
1307         U_BOOT_CMD_MKENT(edit, 2, 0, do_env_edit, "", ""),
1308 #endif
1309 #if defined(CONFIG_CMD_ENV_CALLBACK)
1310         U_BOOT_CMD_MKENT(callbacks, 1, 0, do_env_callback, "", ""),
1311 #endif
1312 #if defined(CONFIG_CMD_ENV_FLAGS)
1313         U_BOOT_CMD_MKENT(flags, 1, 0, do_env_flags, "", ""),
1314 #endif
1315 #if defined(CONFIG_CMD_EXPORTENV)
1316         U_BOOT_CMD_MKENT(export, 4, 0, do_env_export, "", ""),
1317 #endif
1318 #if defined(CONFIG_CMD_GREPENV)
1319         U_BOOT_CMD_MKENT(grep, CONFIG_SYS_MAXARGS, 1, do_env_grep, "", ""),
1320 #endif
1321 #if defined(CONFIG_CMD_IMPORTENV)
1322         U_BOOT_CMD_MKENT(import, 5, 0, do_env_import, "", ""),
1323 #endif
1324 #if defined(CONFIG_CMD_NVEDIT_INFO)
1325         U_BOOT_CMD_MKENT(info, 2, 0, do_env_info, "", ""),
1326 #endif
1327         U_BOOT_CMD_MKENT(print, CONFIG_SYS_MAXARGS, 1, do_env_print, "", ""),
1328 #if defined(CONFIG_CMD_RUN)
1329         U_BOOT_CMD_MKENT(run, CONFIG_SYS_MAXARGS, 1, do_run, "", ""),
1330 #endif
1331 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1332         U_BOOT_CMD_MKENT(save, 1, 0, do_env_save, "", ""),
1333 #if defined(CONFIG_CMD_ERASEENV)
1334         U_BOOT_CMD_MKENT(erase, 1, 0, do_env_erase, "", ""),
1335 #endif
1336 #endif
1337         U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
1338 #if defined(CONFIG_CMD_ENV_EXISTS)
1339         U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
1340 #endif
1341 };
1342
1343 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
1344 void env_reloc(void)
1345 {
1346         fixup_cmdtable(cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1347 }
1348 #endif
1349
1350 static int do_env(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1351 {
1352         cmd_tbl_t *cp;
1353
1354         if (argc < 2)
1355                 return CMD_RET_USAGE;
1356
1357         /* drop initial "env" arg */
1358         argc--;
1359         argv++;
1360
1361         cp = find_cmd_tbl(argv[0], cmd_env_sub, ARRAY_SIZE(cmd_env_sub));
1362
1363         if (cp)
1364                 return cp->cmd(cmdtp, flag, argc, argv);
1365
1366         return CMD_RET_USAGE;
1367 }
1368
1369 #ifdef CONFIG_SYS_LONGHELP
1370 static char env_help_text[] =
1371 #if defined(CONFIG_CMD_ASKENV)
1372         "ask name [message] [size] - ask for environment variable\nenv "
1373 #endif
1374 #if defined(CONFIG_CMD_ENV_CALLBACK)
1375         "callbacks - print callbacks and their associated variables\nenv "
1376 #endif
1377         "default [-f] -a - [forcibly] reset default environment\n"
1378         "env default [-f] var [...] - [forcibly] reset variable(s) to their default values\n"
1379         "env delete [-f] var [...] - [forcibly] delete variable(s)\n"
1380 #if defined(CONFIG_CMD_EDITENV)
1381         "env edit name - edit environment variable\n"
1382 #endif
1383 #if defined(CONFIG_CMD_ENV_EXISTS)
1384         "env exists name - tests for existence of variable\n"
1385 #endif
1386 #if defined(CONFIG_CMD_EXPORTENV)
1387         "env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1388 #endif
1389 #if defined(CONFIG_CMD_ENV_FLAGS)
1390         "env flags - print variables that have non-default flags\n"
1391 #endif
1392 #if defined(CONFIG_CMD_GREPENV)
1393 #ifdef CONFIG_REGEX
1394         "env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1395 #else
1396         "env grep [-n | -v | -b] string [...] - search environment\n"
1397 #endif
1398 #endif
1399 #if defined(CONFIG_CMD_IMPORTENV)
1400         "env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import environment\n"
1401 #endif
1402 #if defined(CONFIG_CMD_NVEDIT_INFO)
1403         "env info - display environment information\n"
1404         "env info [-d] - whether default environment is used\n"
1405         "env info [-p] - whether environment can be persisted\n"
1406 #endif
1407         "env print [-a | name ...] - print environment\n"
1408 #if defined(CONFIG_CMD_NVEDIT_EFI)
1409         "env print -e [-guid guid|-all][-n] [name ...] - print UEFI environment\n"
1410 #endif
1411 #if defined(CONFIG_CMD_RUN)
1412         "env run var [...] - run commands in an environment variable\n"
1413 #endif
1414 #if defined(CONFIG_CMD_SAVEENV) && defined(ENV_IS_IN_DEVICE)
1415         "env save - save environment\n"
1416 #if defined(CONFIG_CMD_ERASEENV)
1417         "env erase - erase environment\n"
1418 #endif
1419 #endif
1420 #if defined(CONFIG_CMD_NVEDIT_EFI)
1421         "env set -e [-nv][-bs][-rt][-at][-a][-i addr,size][-v] name [arg ...]\n"
1422         "    - set UEFI variable; unset if '-i' or 'arg' not specified\n"
1423 #endif
1424         "env set [-f] name [arg ...]\n";
1425 #endif
1426
1427 U_BOOT_CMD(
1428         env, CONFIG_SYS_MAXARGS, 1, do_env,
1429         "environment handling commands", env_help_text
1430 );
1431
1432 /*
1433  * Old command line interface, kept for compatibility
1434  */
1435
1436 #if defined(CONFIG_CMD_EDITENV)
1437 U_BOOT_CMD_COMPLETE(
1438         editenv, 2, 0,  do_env_edit,
1439         "edit environment variable",
1440         "name\n"
1441         "    - edit environment variable 'name'",
1442         var_complete
1443 );
1444 #endif
1445
1446 U_BOOT_CMD_COMPLETE(
1447         printenv, CONFIG_SYS_MAXARGS, 1,        do_env_print,
1448         "print environment variables",
1449         "[-a]\n    - print [all] values of all environment variables\n"
1450 #if defined(CONFIG_CMD_NVEDIT_EFI)
1451         "printenv -e [-guid guid|-all][-n] [name ...]\n"
1452         "    - print UEFI variable 'name' or all the variables\n"
1453         "      \"-n\": suppress dumping variable's value\n"
1454 #endif
1455         "printenv name ...\n"
1456         "    - print value of environment variable 'name'",
1457         var_complete
1458 );
1459
1460 #ifdef CONFIG_CMD_GREPENV
1461 U_BOOT_CMD_COMPLETE(
1462         grepenv, CONFIG_SYS_MAXARGS, 0,  do_env_grep,
1463         "search environment variables",
1464 #ifdef CONFIG_REGEX
1465         "[-e] [-n | -v | -b] string ...\n"
1466 #else
1467         "[-n | -v | -b] string ...\n"
1468 #endif
1469         "    - list environment name=value pairs matching 'string'\n"
1470 #ifdef CONFIG_REGEX
1471         "      \"-e\": enable regular expressions;\n"
1472 #endif
1473         "      \"-n\": search variable names; \"-v\": search values;\n"
1474         "      \"-b\": search both names and values (default)",
1475         var_complete
1476 );
1477 #endif
1478
1479 U_BOOT_CMD_COMPLETE(
1480         setenv, CONFIG_SYS_MAXARGS, 0,  do_env_set,
1481         "set environment variables",
1482 #if defined(CONFIG_CMD_NVEDIT_EFI)
1483         "-e [-guid guid][-nv][-bs][-rt][-at][-a][-v]\n"
1484         "        [-i addr,size name], or [name [value ...]]\n"
1485         "    - set UEFI variable 'name' to 'value' ...'\n"
1486         "      \"-guid\": set vendor guid\n"
1487         "      \"-nv\": set non-volatile attribute\n"
1488         "      \"-bs\": set boot-service attribute\n"
1489         "      \"-rt\": set runtime attribute\n"
1490         "      \"-at\": set time-based authentication attribute\n"
1491         "      \"-a\": append-write\n"
1492         "      \"-i addr,size\": use <addr,size> as variable's value\n"
1493         "      \"-v\": verbose message\n"
1494         "    - delete UEFI variable 'name' if 'value' not specified\n"
1495 #endif
1496         "setenv [-f] name value ...\n"
1497         "    - [forcibly] set environment variable 'name' to 'value ...'\n"
1498         "setenv [-f] name\n"
1499         "    - [forcibly] delete environment variable 'name'",
1500         var_complete
1501 );
1502
1503 #if defined(CONFIG_CMD_ASKENV)
1504
1505 U_BOOT_CMD(
1506         askenv, CONFIG_SYS_MAXARGS,     1,      do_env_ask,
1507         "get environment variables from stdin",
1508         "name [message] [size]\n"
1509         "    - get environment variable 'name' from stdin (max 'size' chars)"
1510 );
1511 #endif
1512
1513 #if defined(CONFIG_CMD_RUN)
1514 U_BOOT_CMD_COMPLETE(
1515         run,    CONFIG_SYS_MAXARGS,     1,      do_run,
1516         "run commands in an environment variable",
1517         "var [...]\n"
1518         "    - run the commands in the environment variable(s) 'var'",
1519         var_complete
1520 );
1521 #endif
1522 #endif /* CONFIG_SPL_BUILD */