common/main.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * Add to readline cmdline-editing by
   6  * (C) Copyright 2005
   7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 /* #define      DEBUG   */
  13
  14 #include <common.h>
  15 #include <command.h>
  16 #include <fdtdec.h>
  17 #include <hush.h>
  18 #include <malloc.h>
  19 #include <menu.h>
  20 #include <post.h>
  21 #include <version.h>
  22 #include <watchdog.h>
  23 #include <linux/ctype.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /*
  28  * Board-specific Platform code can reimplement show_boot_progress () if needed
  29  */
  30 void inline __show_boot_progress (int val) {}
  31 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  32
  33 #define MAX_DELAY_STOP_STR 32
  34
  35 #define DEBUG_PARSER    0       /* set to 1 to debug */
  36
  37 #define debug_parser(fmt, args...)              \
  38         debug_cond(DEBUG_PARSER, fmt, ##args)
  39
  40 #ifndef DEBUG_BOOTKEYS
  41 #define DEBUG_BOOTKEYS 0
  42 #endif
  43 #define debug_bootkeys(fmt, args...)            \
  44         debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
  45
  46 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  47
  48 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  49 static const char erase_seq[] = "\b \b";                /* erase sequence       */
  50 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
  51
  52 #ifdef CONFIG_BOOT_RETRY_TIME
  53 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  54 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  55 #endif
  56
  57 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  58
  59 #ifndef CONFIG_BOOT_RETRY_MIN
  60 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  61 #endif
  62
  63 #ifdef CONFIG_MODEM_SUPPORT
  64 int do_mdm_init = 0;
  65 extern void mdm_init(void); /* defined in board.c */
  66 #endif
  67
  68 /***************************************************************************
  69  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  70  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  71  */
  72 #if defined(CONFIG_BOOTDELAY)
  73 # if defined(CONFIG_AUTOBOOT_KEYED)
  74 static int abortboot_keyed(int bootdelay)
  75 {
  76         int abort = 0;
  77         uint64_t etime = endtick(bootdelay);
  78         struct {
  79                 char* str;
  80                 u_int len;
  81                 int retry;
  82         }
  83         delaykey [] = {
  84                 { str: getenv ("bootdelaykey"),  retry: 1 },
  85                 { str: getenv ("bootdelaykey2"), retry: 1 },
  86                 { str: getenv ("bootstopkey"),   retry: 0 },
  87                 { str: getenv ("bootstopkey2"),  retry: 0 },
  88         };
  89
  90         char presskey [MAX_DELAY_STOP_STR];
  91         u_int presskey_len = 0;
  92         u_int presskey_max = 0;
  93         u_int i;
  94
  95 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
  96         if (bootdelay == 0)
  97                 return 0;
  98 #endif
  99
 100 #  ifdef CONFIG_AUTOBOOT_PROMPT
 101         printf(CONFIG_AUTOBOOT_PROMPT);
 102 #  endif
 103
 104 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 105         if (delaykey[0].str == NULL)
 106                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 107 #  endif
 108 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 109         if (delaykey[1].str == NULL)
 110                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 111 #  endif
 112 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 113         if (delaykey[2].str == NULL)
 114                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 115 #  endif
 116 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 117         if (delaykey[3].str == NULL)
 118                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 119 #  endif
 120
 121         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 122                 delaykey[i].len = delaykey[i].str == NULL ?
 123                                     0 : strlen (delaykey[i].str);
 124                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 125                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 126
 127                 presskey_max = presskey_max > delaykey[i].len ?
 128                                     presskey_max : delaykey[i].len;
 129
 130                 debug_bootkeys("%s key:<%s>\n",
 131                                delaykey[i].retry ? "delay" : "stop",
 132                                delaykey[i].str ? delaykey[i].str : "NULL");
 133         }
 134
 135         /* In order to keep up with incoming data, check timeout only
 136          * when catch up.
 137          */
 138         do {
 139                 if (tstc()) {
 140                         if (presskey_len < presskey_max) {
 141                                 presskey [presskey_len ++] = getc();
 142                         }
 143                         else {
 144                                 for (i = 0; i < presskey_max - 1; i ++)
 145                                         presskey [i] = presskey [i + 1];
 146
 147                                 presskey [i] = getc();
 148                         }
 149                 }
 150
 151                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 152                         if (delaykey[i].len > 0 &&
 153                             presskey_len >= delaykey[i].len &&
 154                             memcmp (presskey + presskey_len - delaykey[i].len,
 155                                     delaykey[i].str,
 156                                     delaykey[i].len) == 0) {
 157                                 debug_bootkeys("got %skey\n",
 158                                                delaykey[i].retry ? "delay" :
 159                                                "stop");
 160
 161 #  ifdef CONFIG_BOOT_RETRY_TIME
 162                                 /* don't retry auto boot */
 163                                 if (! delaykey[i].retry)
 164                                         retry_time = -1;
 165 #  endif
 166                                 abort = 1;
 167                         }
 168                 }
 169         } while (!abort && get_ticks() <= etime);
 170
 171         if (!abort)
 172                 debug_bootkeys("key timeout\n");
 173
 174 #ifdef CONFIG_SILENT_CONSOLE
 175         if (abort)
 176                 gd->flags &= ~GD_FLG_SILENT;
 177 #endif
 178
 179         return abort;
 180 }
 181
 182 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 183
 184 #ifdef CONFIG_MENUKEY
 185 static int menukey = 0;
 186 #endif
 187
 188 static int abortboot_normal(int bootdelay)
 189 {
 190         int abort = 0;
 191         unsigned long ts;
 192
 193 #ifdef CONFIG_MENUPROMPT
 194         printf(CONFIG_MENUPROMPT);
 195 #else
 196         if (bootdelay >= 0)
 197                 printf("Hit any key to stop autoboot: %2d ", bootdelay);
 198 #endif
 199
 200 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 201         /*
 202          * Check if key already pressed
 203          * Don't check if bootdelay < 0
 204          */
 205         if (bootdelay >= 0) {
 206                 if (tstc()) {   /* we got a key press   */
 207                         (void) getc();  /* consume input        */
 208                         puts ("\b\b\b 0");
 209                         abort = 1;      /* don't auto boot      */
 210                 }
 211         }
 212 #endif
 213
 214         while ((bootdelay > 0) && (!abort)) {
 215                 --bootdelay;
 216                 /* delay 1000 ms */
 217                 ts = get_timer(0);
 218                 do {
 219                         if (tstc()) {   /* we got a key press   */
 220                                 abort  = 1;     /* don't auto boot      */
 221                                 bootdelay = 0;  /* no more delay        */
 222 # ifdef CONFIG_MENUKEY
 223                                 menukey = getc();
 224 # else
 225                                 (void) getc();  /* consume input        */
 226 # endif
 227                                 break;
 228                         }
 229                         udelay(10000);
 230                 } while (!abort && get_timer(ts) < 1000);
 231
 232                 printf("\b\b\b%2d ", bootdelay);
 233         }
 234
 235         putc('\n');
 236
 237 #ifdef CONFIG_SILENT_CONSOLE
 238         if (abort)
 239                 gd->flags &= ~GD_FLG_SILENT;
 240 #endif
 241
 242         return abort;
 243 }
 244 # endif /* CONFIG_AUTOBOOT_KEYED */
 245
 246 static int abortboot(int bootdelay)
 247 {
 248 #ifdef CONFIG_AUTOBOOT_KEYED
 249         return abortboot_keyed(bootdelay);
 250 #else
 251         return abortboot_normal(bootdelay);
 252 #endif
 253 }
 254 #endif  /* CONFIG_BOOTDELAY */
 255
 256 /*
 257  * Runs the given boot command securely.  Specifically:
 258  * - Doesn't run the command with the shell (run_command or parse_string_outer),
 259  *   since that's a lot of code surface that an attacker might exploit.
 260  *   Because of this, we don't do any argument parsing--the secure boot command
 261  *   has to be a full-fledged u-boot command.
 262  * - Doesn't check for keypresses before booting, since that could be a
 263  *   security hole; also disables Ctrl-C.
 264  * - Doesn't allow the command to return.
 265  *
 266  * Upon any failures, this function will drop into an infinite loop after
 267  * printing the error message to console.
 268  */
 269
 270 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
 271 static void secure_boot_cmd(char *cmd)
 272 {
 273         cmd_tbl_t *cmdtp;
 274         int rc;
 275
 276         if (!cmd) {
 277                 printf("## Error: Secure boot command not specified\n");
 278                 goto err;
 279         }
 280
 281         /* Disable Ctrl-C just in case some command is used that checks it. */
 282         disable_ctrlc(1);
 283
 284         /* Find the command directly. */
 285         cmdtp = find_cmd(cmd);
 286         if (!cmdtp) {
 287                 printf("## Error: \"%s\" not defined\n", cmd);
 288                 goto err;
 289         }
 290
 291         /* Run the command, forcing no flags and faking argc and argv. */
 292         rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
 293
 294         /* Shouldn't ever return from boot command. */
 295         printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
 296
 297 err:
 298         /*
 299          * Not a whole lot to do here.  Rebooting won't help much, since we'll
 300          * just end up right back here.  Just loop.
 301          */
 302         hang();
 303 }
 304
 305 static void process_fdt_options(const void *blob)
 306 {
 307         ulong addr;
 308
 309         /* Add an env variable to point to a kernel payload, if available */
 310         addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
 311         if (addr)
 312                 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
 313
 314         /* Add an env variable to point to a root disk, if available */
 315         addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
 316         if (addr)
 317                 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
 318 }
 319 #endif /* CONFIG_OF_CONTROL */
 320
 321 #ifdef CONFIG_BOOTDELAY
 322 static void process_boot_delay(void)
 323 {
 324 #ifdef CONFIG_OF_CONTROL
 325         char *env;
 326 #endif
 327         char *s;
 328         int bootdelay;
 329 #ifdef CONFIG_BOOTCOUNT_LIMIT
 330         unsigned long bootcount = 0;
 331         unsigned long bootlimit = 0;
 332 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 333
 334 #ifdef CONFIG_BOOTCOUNT_LIMIT
 335         bootcount = bootcount_load();
 336         bootcount++;
 337         bootcount_store (bootcount);
 338         setenv_ulong("bootcount", bootcount);
 339         bootlimit = getenv_ulong("bootlimit", 10, 0);
 340 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 341
 342         s = getenv ("bootdelay");
 343         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 344
 345 #ifdef CONFIG_OF_CONTROL
 346         bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
 347                         bootdelay);
 348 #endif
 349
 350         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 351
 352 #if defined(CONFIG_MENU_SHOW)
 353         bootdelay = menu_show(bootdelay);
 354 #endif
 355 # ifdef CONFIG_BOOT_RETRY_TIME
 356         init_cmd_timeout ();
 357 # endif /* CONFIG_BOOT_RETRY_TIME */
 358
 359 #ifdef CONFIG_POST
 360         if (gd->flags & GD_FLG_POSTFAIL) {
 361                 s = getenv("failbootcmd");
 362         }
 363         else
 364 #endif /* CONFIG_POST */
 365 #ifdef CONFIG_BOOTCOUNT_LIMIT
 366         if (bootlimit && (bootcount > bootlimit)) {
 367                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 368                         (unsigned)bootlimit);
 369                 s = getenv ("altbootcmd");
 370         }
 371         else
 372 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 373                 s = getenv ("bootcmd");
 374 #ifdef CONFIG_OF_CONTROL
 375         /* Allow the fdt to override the boot command */
 376         env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
 377         if (env)
 378                 s = env;
 379
 380         process_fdt_options(gd->fdt_blob);
 381
 382         /*
 383          * If the bootsecure option was chosen, use secure_boot_cmd().
 384          * Always use 'env' in this case, since bootsecure requres that the
 385          * bootcmd was specified in the FDT too.
 386          */
 387         if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
 388                 secure_boot_cmd(env);
 389
 390 #endif /* CONFIG_OF_CONTROL */
 391
 392         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 393
 394         if (bootdelay != -1 && s && !abortboot(bootdelay)) {
 395 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
 396                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 397 #endif
 398
 399                 run_command_list(s, -1, 0);
 400
 401 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
 402                 disable_ctrlc(prev);    /* restore Control C checking */
 403 #endif
 404         }
 405
 406 #ifdef CONFIG_MENUKEY
 407         if (menukey == CONFIG_MENUKEY) {
 408                 s = getenv("menucmd");
 409                 if (s)
 410                         run_command_list(s, -1, 0);
 411         }
 412 #endif /* CONFIG_MENUKEY */
 413 }
 414 #endif /* CONFIG_BOOTDELAY */
 415
 416 void main_loop(void)
 417 {
 418 #ifndef CONFIG_SYS_HUSH_PARSER
 419         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 420         int len;
 421         int rc = 1;
 422         int flag;
 423 #endif
 424 #ifdef CONFIG_PREBOOT
 425         char *p;
 426 #endif
 427
 428         bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
 429
 430 #ifndef CONFIG_SYS_GENERIC_BOARD
 431         puts("Warning: Your board does not use generic board. Please read\n");
 432         puts("doc/README.generic-board and take action. Boards not\n");
 433         puts("upgraded by the late 2014 may break or be removed.\n");
 434 #endif
 435
 436 #ifdef CONFIG_MODEM_SUPPORT
 437         debug("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 438         if (do_mdm_init) {
 439                 char *str = strdup(getenv("mdm_cmd"));
 440                 setenv("preboot", str);  /* set or delete definition */
 441                 if (str != NULL)
 442                         free(str);
 443                 mdm_init(); /* wait for modem connection */
 444         }
 445 #endif  /* CONFIG_MODEM_SUPPORT */
 446
 447 #ifdef CONFIG_VERSION_VARIABLE
 448         {
 449                 setenv("ver", version_string);  /* set version variable */
 450         }
 451 #endif /* CONFIG_VERSION_VARIABLE */
 452
 453 #ifdef CONFIG_SYS_HUSH_PARSER
 454         u_boot_hush_start();
 455 #endif
 456
 457 #if defined(CONFIG_HUSH_INIT_VAR)
 458         hush_init_var();
 459 #endif
 460
 461 #ifdef CONFIG_PREBOOT
 462         p = getenv("preboot");
 463         if (p != NULL) {
 464 # ifdef CONFIG_AUTOBOOT_KEYED
 465                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 466 # endif
 467
 468                 run_command_list(p, -1, 0);
 469
 470 # ifdef CONFIG_AUTOBOOT_KEYED
 471                 disable_ctrlc(prev);    /* restore Control C checking */
 472 # endif
 473         }
 474 #endif /* CONFIG_PREBOOT */
 475
 476 #if defined(CONFIG_UPDATE_TFTP)
 477         update_tftp(0UL);
 478 #endif /* CONFIG_UPDATE_TFTP */
 479
 480 #ifdef CONFIG_BOOTDELAY
 481         process_boot_delay();
 482 #endif
 483         /*
 484          * Main Loop for Monitor Command Processing
 485          */
 486 #ifdef CONFIG_SYS_HUSH_PARSER
 487         parse_file_outer();
 488         /* This point is never reached */
 489         for (;;);
 490 #else
 491         for (;;) {
 492 #ifdef CONFIG_BOOT_RETRY_TIME
 493                 if (rc >= 0) {
 494                         /* Saw enough of a valid command to
 495                          * restart the timeout.
 496                          */
 497                         reset_cmd_timeout();
 498                 }
 499 #endif
 500                 len = readline (CONFIG_SYS_PROMPT);
 501
 502                 flag = 0;       /* assume no special flags for now */
 503                 if (len > 0)
 504                         strcpy (lastcommand, console_buffer);
 505                 else if (len == 0)
 506                         flag |= CMD_FLAG_REPEAT;
 507 #ifdef CONFIG_BOOT_RETRY_TIME
 508                 else if (len == -2) {
 509                         /* -2 means timed out, retry autoboot
 510                          */
 511                         puts ("\nTimed out waiting for command\n");
 512 # ifdef CONFIG_RESET_TO_RETRY
 513                         /* Reinit board to run initialization code again */
 514                         do_reset (NULL, 0, 0, NULL);
 515 # else
 516                         return;         /* retry autoboot */
 517 # endif
 518                 }
 519 #endif
 520
 521                 if (len == -1)
 522                         puts ("<INTERRUPT>\n");
 523                 else
 524                         rc = run_command(lastcommand, flag);
 525
 526                 if (rc <= 0) {
 527                         /* invalid command or not repeatable, forget it */
 528                         lastcommand[0] = 0;
 529                 }
 530         }
 531 #endif /*CONFIG_SYS_HUSH_PARSER*/
 532 }
 533
 534 #ifdef CONFIG_BOOT_RETRY_TIME
 535 /***************************************************************************
 536  * initialize command line timeout
 537  */
 538 void init_cmd_timeout(void)
 539 {
 540         char *s = getenv ("bootretry");
 541
 542         if (s != NULL)
 543                 retry_time = (int)simple_strtol(s, NULL, 10);
 544         else
 545                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 546
 547         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 548                 retry_time = CONFIG_BOOT_RETRY_MIN;
 549 }
 550
 551 /***************************************************************************
 552  * reset command line timeout to retry_time seconds
 553  */
 554 void reset_cmd_timeout(void)
 555 {
 556         endtime = endtick(retry_time);
 557 }
 558 #endif
 559
 560 #ifdef CONFIG_CMDLINE_EDITING
 561
 562 /*
 563  * cmdline-editing related codes from vivi.
 564  * Author: Janghoon Lyu <nandy@mizi.com>
 565  */
 566
 567 #define putnstr(str,n)  do {                    \
 568                 printf ("%.*s", (int)n, str);   \
 569         } while (0)
 570
 571 #define CTL_CH(c)               ((c) - 'a' + 1)
 572 #define CTL_BACKSPACE           ('\b')
 573 #define DEL                     ((char)255)
 574 #define DEL7                    ((char)127)
 575 #define CREAD_HIST_CHAR         ('!')
 576
 577 #define getcmd_putch(ch)        putc(ch)
 578 #define getcmd_getch()          getc()
 579 #define getcmd_cbeep()          getcmd_putch('\a')
 580
 581 #define HIST_MAX                20
 582 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 583
 584 static int hist_max;
 585 static int hist_add_idx;
 586 static int hist_cur = -1;
 587 static unsigned hist_num;
 588
 589 static char *hist_list[HIST_MAX];
 590 static char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 591
 592 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 593
 594 static void hist_init(void)
 595 {
 596         int i;
 597
 598         hist_max = 0;
 599         hist_add_idx = 0;
 600         hist_cur = -1;
 601         hist_num = 0;
 602
 603         for (i = 0; i < HIST_MAX; i++) {
 604                 hist_list[i] = hist_lines[i];
 605                 hist_list[i][0] = '\0';
 606         }
 607 }
 608
 609 static void cread_add_to_hist(char *line)
 610 {
 611         strcpy(hist_list[hist_add_idx], line);
 612
 613         if (++hist_add_idx >= HIST_MAX)
 614                 hist_add_idx = 0;
 615
 616         if (hist_add_idx > hist_max)
 617                 hist_max = hist_add_idx;
 618
 619         hist_num++;
 620 }
 621
 622 static char* hist_prev(void)
 623 {
 624         char *ret;
 625         int old_cur;
 626
 627         if (hist_cur < 0)
 628                 return NULL;
 629
 630         old_cur = hist_cur;
 631         if (--hist_cur < 0)
 632                 hist_cur = hist_max;
 633
 634         if (hist_cur == hist_add_idx) {
 635                 hist_cur = old_cur;
 636                 ret = NULL;
 637         } else
 638                 ret = hist_list[hist_cur];
 639
 640         return (ret);
 641 }
 642
 643 static char* hist_next(void)
 644 {
 645         char *ret;
 646
 647         if (hist_cur < 0)
 648                 return NULL;
 649
 650         if (hist_cur == hist_add_idx)
 651                 return NULL;
 652
 653         if (++hist_cur > hist_max)
 654                 hist_cur = 0;
 655
 656         if (hist_cur == hist_add_idx) {
 657                 ret = "";
 658         } else
 659                 ret = hist_list[hist_cur];
 660
 661         return (ret);
 662 }
 663
 664 #ifndef CONFIG_CMDLINE_EDITING
 665 static void cread_print_hist_list(void)
 666 {
 667         int i;
 668         unsigned long n;
 669
 670         n = hist_num - hist_max;
 671
 672         i = hist_add_idx + 1;
 673         while (1) {
 674                 if (i > hist_max)
 675                         i = 0;
 676                 if (i == hist_add_idx)
 677                         break;
 678                 printf("%s\n", hist_list[i]);
 679                 n++;
 680                 i++;
 681         }
 682 }
 683 #endif /* CONFIG_CMDLINE_EDITING */
 684
 685 #define BEGINNING_OF_LINE() {                   \
 686         while (num) {                           \
 687                 getcmd_putch(CTL_BACKSPACE);    \
 688                 num--;                          \
 689         }                                       \
 690 }
 691
 692 #define ERASE_TO_EOL() {                                \
 693         if (num < eol_num) {                            \
 694                 printf("%*s", (int)(eol_num - num), ""); \
 695                 do {                                    \
 696                         getcmd_putch(CTL_BACKSPACE);    \
 697                 } while (--eol_num > num);              \
 698         }                                               \
 699 }
 700
 701 #define REFRESH_TO_EOL() {                      \
 702         if (num < eol_num) {                    \
 703                 wlen = eol_num - num;           \
 704                 putnstr(buf + num, wlen);       \
 705                 num = eol_num;                  \
 706         }                                       \
 707 }
 708
 709 static void cread_add_char(char ichar, int insert, unsigned long *num,
 710                unsigned long *eol_num, char *buf, unsigned long len)
 711 {
 712         unsigned long wlen;
 713
 714         /* room ??? */
 715         if (insert || *num == *eol_num) {
 716                 if (*eol_num > len - 1) {
 717                         getcmd_cbeep();
 718                         return;
 719                 }
 720                 (*eol_num)++;
 721         }
 722
 723         if (insert) {
 724                 wlen = *eol_num - *num;
 725                 if (wlen > 1) {
 726                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 727                 }
 728
 729                 buf[*num] = ichar;
 730                 putnstr(buf + *num, wlen);
 731                 (*num)++;
 732                 while (--wlen) {
 733                         getcmd_putch(CTL_BACKSPACE);
 734                 }
 735         } else {
 736                 /* echo the character */
 737                 wlen = 1;
 738                 buf[*num] = ichar;
 739                 putnstr(buf + *num, wlen);
 740                 (*num)++;
 741         }
 742 }
 743
 744 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 745               unsigned long *eol_num, char *buf, unsigned long len)
 746 {
 747         while (strsize--) {
 748                 cread_add_char(*str, insert, num, eol_num, buf, len);
 749                 str++;
 750         }
 751 }
 752
 753 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
 754                 int timeout)
 755 {
 756         unsigned long num = 0;
 757         unsigned long eol_num = 0;
 758         unsigned long wlen;
 759         char ichar;
 760         int insert = 1;
 761         int esc_len = 0;
 762         char esc_save[8];
 763         int init_len = strlen(buf);
 764         int first = 1;
 765
 766         if (init_len)
 767                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 768
 769         while (1) {
 770 #ifdef CONFIG_BOOT_RETRY_TIME
 771                 while (!tstc()) {       /* while no incoming data */
 772                         if (retry_time >= 0 && get_ticks() > endtime)
 773                                 return (-2);    /* timed out */
 774                         WATCHDOG_RESET();
 775                 }
 776 #endif
 777                 if (first && timeout) {
 778                         uint64_t etime = endtick(timeout);
 779
 780                         while (!tstc()) {       /* while no incoming data */
 781                                 if (get_ticks() >= etime)
 782                                         return -2;      /* timed out */
 783                                 WATCHDOG_RESET();
 784                         }
 785                         first = 0;
 786                 }
 787
 788                 ichar = getcmd_getch();
 789
 790                 if ((ichar == '\n') || (ichar == '\r')) {
 791                         putc('\n');
 792                         break;
 793                 }
 794
 795                 /*
 796                  * handle standard linux xterm esc sequences for arrow key, etc.
 797                  */
 798                 if (esc_len != 0) {
 799                         if (esc_len == 1) {
 800                                 if (ichar == '[') {
 801                                         esc_save[esc_len] = ichar;
 802                                         esc_len = 2;
 803                                 } else {
 804                                         cread_add_str(esc_save, esc_len, insert,
 805                                                       &num, &eol_num, buf, *len);
 806                                         esc_len = 0;
 807                                 }
 808                                 continue;
 809                         }
 810
 811                         switch (ichar) {
 812
 813                         case 'D':       /* <- key */
 814                                 ichar = CTL_CH('b');
 815                                 esc_len = 0;
 816                                 break;
 817                         case 'C':       /* -> key */
 818                                 ichar = CTL_CH('f');
 819                                 esc_len = 0;
 820                                 break;  /* pass off to ^F handler */
 821                         case 'H':       /* Home key */
 822                                 ichar = CTL_CH('a');
 823                                 esc_len = 0;
 824                                 break;  /* pass off to ^A handler */
 825                         case 'A':       /* up arrow */
 826                                 ichar = CTL_CH('p');
 827                                 esc_len = 0;
 828                                 break;  /* pass off to ^P handler */
 829                         case 'B':       /* down arrow */
 830                                 ichar = CTL_CH('n');
 831                                 esc_len = 0;
 832                                 break;  /* pass off to ^N handler */
 833                         default:
 834                                 esc_save[esc_len++] = ichar;
 835                                 cread_add_str(esc_save, esc_len, insert,
 836                                               &num, &eol_num, buf, *len);
 837                                 esc_len = 0;
 838                                 continue;
 839                         }
 840                 }
 841
 842                 switch (ichar) {
 843                 case 0x1b:
 844                         if (esc_len == 0) {
 845                                 esc_save[esc_len] = ichar;
 846                                 esc_len = 1;
 847                         } else {
 848                                 puts("impossible condition #876\n");
 849                                 esc_len = 0;
 850                         }
 851                         break;
 852
 853                 case CTL_CH('a'):
 854                         BEGINNING_OF_LINE();
 855                         break;
 856                 case CTL_CH('c'):       /* ^C - break */
 857                         *buf = '\0';    /* discard input */
 858                         return (-1);
 859                 case CTL_CH('f'):
 860                         if (num < eol_num) {
 861                                 getcmd_putch(buf[num]);
 862                                 num++;
 863                         }
 864                         break;
 865                 case CTL_CH('b'):
 866                         if (num) {
 867                                 getcmd_putch(CTL_BACKSPACE);
 868                                 num--;
 869                         }
 870                         break;
 871                 case CTL_CH('d'):
 872                         if (num < eol_num) {
 873                                 wlen = eol_num - num - 1;
 874                                 if (wlen) {
 875                                         memmove(&buf[num], &buf[num+1], wlen);
 876                                         putnstr(buf + num, wlen);
 877                                 }
 878
 879                                 getcmd_putch(' ');
 880                                 do {
 881                                         getcmd_putch(CTL_BACKSPACE);
 882                                 } while (wlen--);
 883                                 eol_num--;
 884                         }
 885                         break;
 886                 case CTL_CH('k'):
 887                         ERASE_TO_EOL();
 888                         break;
 889                 case CTL_CH('e'):
 890                         REFRESH_TO_EOL();
 891                         break;
 892                 case CTL_CH('o'):
 893                         insert = !insert;
 894                         break;
 895                 case CTL_CH('x'):
 896                 case CTL_CH('u'):
 897                         BEGINNING_OF_LINE();
 898                         ERASE_TO_EOL();
 899                         break;
 900                 case DEL:
 901                 case DEL7:
 902                 case 8:
 903                         if (num) {
 904                                 wlen = eol_num - num;
 905                                 num--;
 906                                 memmove(&buf[num], &buf[num+1], wlen);
 907                                 getcmd_putch(CTL_BACKSPACE);
 908                                 putnstr(buf + num, wlen);
 909                                 getcmd_putch(' ');
 910                                 do {
 911                                         getcmd_putch(CTL_BACKSPACE);
 912                                 } while (wlen--);
 913                                 eol_num--;
 914                         }
 915                         break;
 916                 case CTL_CH('p'):
 917                 case CTL_CH('n'):
 918                 {
 919                         char * hline;
 920
 921                         esc_len = 0;
 922
 923                         if (ichar == CTL_CH('p'))
 924                                 hline = hist_prev();
 925                         else
 926                                 hline = hist_next();
 927
 928                         if (!hline) {
 929                                 getcmd_cbeep();
 930                                 continue;
 931                         }
 932
 933                         /* nuke the current line */
 934                         /* first, go home */
 935                         BEGINNING_OF_LINE();
 936
 937                         /* erase to end of line */
 938                         ERASE_TO_EOL();
 939
 940                         /* copy new line into place and display */
 941                         strcpy(buf, hline);
 942                         eol_num = strlen(buf);
 943                         REFRESH_TO_EOL();
 944                         continue;
 945                 }
 946 #ifdef CONFIG_AUTO_COMPLETE
 947                 case '\t': {
 948                         int num2, col;
 949
 950                         /* do not autocomplete when in the middle */
 951                         if (num < eol_num) {
 952                                 getcmd_cbeep();
 953                                 break;
 954                         }
 955
 956                         buf[num] = '\0';
 957                         col = strlen(prompt) + eol_num;
 958                         num2 = num;
 959                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 960                                 col = num2 - num;
 961                                 num += col;
 962                                 eol_num += col;
 963                         }
 964                         break;
 965                 }
 966 #endif
 967                 default:
 968                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 969                         break;
 970                 }
 971         }
 972         *len = eol_num;
 973         buf[eol_num] = '\0';    /* lose the newline */
 974
 975         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 976                 cread_add_to_hist(buf);
 977         hist_cur = hist_add_idx;
 978
 979         return 0;
 980 }
 981
 982 #endif /* CONFIG_CMDLINE_EDITING */
 983
 984 /****************************************************************************/
 985
 986 /*
 987  * Prompt for input and read a line.
 988  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 989  * time out when time goes past endtime (timebase time in ticks).
 990  * Return:      number of read characters
 991  *              -1 if break
 992  *              -2 if timed out
 993  */
 994 int readline (const char *const prompt)
 995 {
 996         /*
 997          * If console_buffer isn't 0-length the user will be prompted to modify
 998          * it instead of entering it from scratch as desired.
 999          */
1000         console_buffer[0] = '\0';
1001
1002         return readline_into_buffer(prompt, console_buffer, 0);
1003 }
1004
1005
1006 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1007 {
1008         char *p = buffer;
1009 #ifdef CONFIG_CMDLINE_EDITING
1010         unsigned int len = CONFIG_SYS_CBSIZE;
1011         int rc;
1012         static int initted = 0;
1013
1014         /*
1015          * History uses a global array which is not
1016          * writable until after relocation to RAM.
1017          * Revert to non-history version if still
1018          * running from flash.
1019          */
1020         if (gd->flags & GD_FLG_RELOC) {
1021                 if (!initted) {
1022                         hist_init();
1023                         initted = 1;
1024                 }
1025
1026                 if (prompt)
1027                         puts (prompt);
1028
1029                 rc = cread_line(prompt, p, &len, timeout);
1030                 return rc < 0 ? rc : len;
1031
1032         } else {
1033 #endif  /* CONFIG_CMDLINE_EDITING */
1034         char * p_buf = p;
1035         int     n = 0;                          /* buffer index         */
1036         int     plen = 0;                       /* prompt length        */
1037         int     col;                            /* output column cnt    */
1038         char    c;
1039
1040         /* print prompt */
1041         if (prompt) {
1042                 plen = strlen (prompt);
1043                 puts (prompt);
1044         }
1045         col = plen;
1046
1047         for (;;) {
1048 #ifdef CONFIG_BOOT_RETRY_TIME
1049                 while (!tstc()) {       /* while no incoming data */
1050                         if (retry_time >= 0 && get_ticks() > endtime)
1051                                 return (-2);    /* timed out */
1052                         WATCHDOG_RESET();
1053                 }
1054 #endif
1055                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
1056
1057 #ifdef CONFIG_SHOW_ACTIVITY
1058                 while (!tstc()) {
1059                         show_activity(0);
1060                         WATCHDOG_RESET();
1061                 }
1062 #endif
1063                 c = getc();
1064
1065                 /*
1066                  * Special character handling
1067                  */
1068                 switch (c) {
1069                 case '\r':                      /* Enter                */
1070                 case '\n':
1071                         *p = '\0';
1072                         puts ("\r\n");
1073                         return p - p_buf;
1074
1075                 case '\0':                      /* nul                  */
1076                         continue;
1077
1078                 case 0x03:                      /* ^C - break           */
1079                         p_buf[0] = '\0';        /* discard input */
1080                         return -1;
1081
1082                 case 0x15:                      /* ^U - erase line      */
1083                         while (col > plen) {
1084                                 puts (erase_seq);
1085                                 --col;
1086                         }
1087                         p = p_buf;
1088                         n = 0;
1089                         continue;
1090
1091                 case 0x17:                      /* ^W - erase word      */
1092                         p=delete_char(p_buf, p, &col, &n, plen);
1093                         while ((n > 0) && (*p != ' ')) {
1094                                 p=delete_char(p_buf, p, &col, &n, plen);
1095                         }
1096                         continue;
1097
1098                 case 0x08:                      /* ^H  - backspace      */
1099                 case 0x7F:                      /* DEL - backspace      */
1100                         p=delete_char(p_buf, p, &col, &n, plen);
1101                         continue;
1102
1103                 default:
1104                         /*
1105                          * Must be a normal character then
1106                          */
1107                         if (n < CONFIG_SYS_CBSIZE-2) {
1108                                 if (c == '\t') {        /* expand TABs */
1109 #ifdef CONFIG_AUTO_COMPLETE
1110                                         /* if auto completion triggered just continue */
1111                                         *p = '\0';
1112                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1113                                                 p = p_buf + n;  /* reset */
1114                                                 continue;
1115                                         }
1116 #endif
1117                                         puts (tab_seq+(col&07));
1118                                         col += 8 - (col&07);
1119                                 } else {
1120                                         char buf[2];
1121
1122                                         /*
1123                                          * Echo input using puts() to force an
1124                                          * LCD flush if we are using an LCD
1125                                          */
1126                                         ++col;
1127                                         buf[0] = c;
1128                                         buf[1] = '\0';
1129                                         puts(buf);
1130                                 }
1131                                 *p++ = c;
1132                                 ++n;
1133                         } else {                        /* Buffer full          */
1134                                 putc ('\a');
1135                         }
1136                 }
1137         }
1138 #ifdef CONFIG_CMDLINE_EDITING
1139         }
1140 #endif
1141 }
1142
1143 /****************************************************************************/
1144
1145 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1146 {
1147         char *s;
1148
1149         if (*np == 0) {
1150                 return (p);
1151         }
1152
1153         if (*(--p) == '\t') {                   /* will retype the whole line   */
1154                 while (*colp > plen) {
1155                         puts (erase_seq);
1156                         (*colp)--;
1157                 }
1158                 for (s=buffer; s<p; ++s) {
1159                         if (*s == '\t') {
1160                                 puts (tab_seq+((*colp) & 07));
1161                                 *colp += 8 - ((*colp) & 07);
1162                         } else {
1163                                 ++(*colp);
1164                                 putc (*s);
1165                         }
1166                 }
1167         } else {
1168                 puts (erase_seq);
1169                 (*colp)--;
1170         }
1171         (*np)--;
1172         return (p);
1173 }
1174
1175 /****************************************************************************/
1176
1177 int parse_line (char *line, char *argv[])
1178 {
1179         int nargs = 0;
1180
1181         debug_parser("parse_line: \"%s\"\n", line);
1182         while (nargs < CONFIG_SYS_MAXARGS) {
1183
1184                 /* skip any white space */
1185                 while (isblank(*line))
1186                         ++line;
1187
1188                 if (*line == '\0') {    /* end of line, no more args    */
1189                         argv[nargs] = NULL;
1190                         debug_parser("parse_line: nargs=%d\n", nargs);
1191                         return nargs;
1192                 }
1193
1194                 argv[nargs++] = line;   /* begin of argument string     */
1195
1196                 /* find end of string */
1197                 while (*line && !isblank(*line))
1198                         ++line;
1199
1200                 if (*line == '\0') {    /* end of line, no more args    */
1201                         argv[nargs] = NULL;
1202                         debug_parser("parse_line: nargs=%d\n", nargs);
1203                         return nargs;
1204                 }
1205
1206                 *line++ = '\0';         /* terminate current arg         */
1207         }
1208
1209         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1210
1211         debug_parser("parse_line: nargs=%d\n", nargs);
1212         return (nargs);
1213 }
1214
1215 /****************************************************************************/
1216
1217 #ifndef CONFIG_SYS_HUSH_PARSER
1218 static void process_macros (const char *input, char *output)
1219 {
1220         char c, prev;
1221         const char *varname_start = NULL;
1222         int inputcnt = strlen (input);
1223         int outputcnt = CONFIG_SYS_CBSIZE;
1224         int state = 0;          /* 0 = waiting for '$'  */
1225
1226         /* 1 = waiting for '(' or '{' */
1227         /* 2 = waiting for ')' or '}' */
1228         /* 3 = waiting for '''  */
1229         char *output_start = output;
1230
1231         debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
1232                      input);
1233
1234         prev = '\0';            /* previous character   */
1235
1236         while (inputcnt && outputcnt) {
1237                 c = *input++;
1238                 inputcnt--;
1239
1240                 if (state != 3) {
1241                         /* remove one level of escape characters */
1242                         if ((c == '\\') && (prev != '\\')) {
1243                                 if (inputcnt-- == 0)
1244                                         break;
1245                                 prev = c;
1246                                 c = *input++;
1247                         }
1248                 }
1249
1250                 switch (state) {
1251                 case 0: /* Waiting for (unescaped) $    */
1252                         if ((c == '\'') && (prev != '\\')) {
1253                                 state = 3;
1254                                 break;
1255                         }
1256                         if ((c == '$') && (prev != '\\')) {
1257                                 state++;
1258                         } else {
1259                                 *(output++) = c;
1260                                 outputcnt--;
1261                         }
1262                         break;
1263                 case 1: /* Waiting for (        */
1264                         if (c == '(' || c == '{') {
1265                                 state++;
1266                                 varname_start = input;
1267                         } else {
1268                                 state = 0;
1269                                 *(output++) = '$';
1270                                 outputcnt--;
1271
1272                                 if (outputcnt) {
1273                                         *(output++) = c;
1274                                         outputcnt--;
1275                                 }
1276                         }
1277                         break;
1278                 case 2: /* Waiting for )        */
1279                         if (c == ')' || c == '}') {
1280                                 int i;
1281                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1282                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1283
1284                                 /* Get the varname */
1285                                 for (i = 0; i < envcnt; i++) {
1286                                         envname[i] = varname_start[i];
1287                                 }
1288                                 envname[i] = 0;
1289
1290                                 /* Get its value */
1291                                 envval = getenv (envname);
1292
1293                                 /* Copy into the line if it exists */
1294                                 if (envval != NULL)
1295                                         while ((*envval) && outputcnt) {
1296                                                 *(output++) = *(envval++);
1297                                                 outputcnt--;
1298                                         }
1299                                 /* Look for another '$' */
1300                                 state = 0;
1301                         }
1302                         break;
1303                 case 3: /* Waiting for '        */
1304                         if ((c == '\'') && (prev != '\\')) {
1305                                 state = 0;
1306                         } else {
1307                                 *(output++) = c;
1308                                 outputcnt--;
1309                         }
1310                         break;
1311                 }
1312                 prev = c;
1313         }
1314
1315         if (outputcnt)
1316                 *output = 0;
1317         else
1318                 *(output - 1) = 0;
1319
1320         debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1321                      strlen(output_start), output_start);
1322 }
1323
1324 /****************************************************************************
1325  * returns:
1326  *      1  - command executed, repeatable
1327  *      0  - command executed but not repeatable, interrupted commands are
1328  *           always considered not repeatable
1329  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1330  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1331  *           considered unrecognized)
1332  *
1333  * WARNING:
1334  *
1335  * We must create a temporary copy of the command since the command we get
1336  * may be the result from getenv(), which returns a pointer directly to
1337  * the environment data, which may change magicly when the command we run
1338  * creates or modifies environment variables (like "bootp" does).
1339  */
1340 static int builtin_run_command(const char *cmd, int flag)
1341 {
1342         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1343         char *token;                    /* start of token in cmdbuf     */
1344         char *sep;                      /* end of token (separator) in cmdbuf */
1345         char finaltoken[CONFIG_SYS_CBSIZE];
1346         char *str = cmdbuf;
1347         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1348         int argc, inquotes;
1349         int repeatable = 1;
1350         int rc = 0;
1351
1352         debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
1353         if (DEBUG_PARSER) {
1354                 /* use puts - string may be loooong */
1355                 puts(cmd ? cmd : "NULL");
1356                 puts("\"\n");
1357         }
1358         clear_ctrlc();          /* forget any previous Control C */
1359
1360         if (!cmd || !*cmd) {
1361                 return -1;      /* empty command */
1362         }
1363
1364         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1365                 puts ("## Command too long!\n");
1366                 return -1;
1367         }
1368
1369         strcpy (cmdbuf, cmd);
1370
1371         /* Process separators and check for invalid
1372          * repeatable commands
1373          */
1374
1375         debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
1376         while (*str) {
1377
1378                 /*
1379                  * Find separator, or string end
1380                  * Allow simple escape of ';' by writing "\;"
1381                  */
1382                 for (inquotes = 0, sep = str; *sep; sep++) {
1383                         if ((*sep=='\'') &&
1384                             (*(sep-1) != '\\'))
1385                                 inquotes=!inquotes;
1386
1387                         if (!inquotes &&
1388                             (*sep == ';') &&    /* separator            */
1389                             ( sep != str) &&    /* past string start    */
1390                             (*(sep-1) != '\\')) /* and NOT escaped      */
1391                                 break;
1392                 }
1393
1394                 /*
1395                  * Limit the token to data between separators
1396                  */
1397                 token = str;
1398                 if (*sep) {
1399                         str = sep + 1;  /* start of command for next pass */
1400                         *sep = '\0';
1401                 }
1402                 else
1403                         str = sep;      /* no more commands for next pass */
1404                 debug_parser("token: \"%s\"\n", token);
1405
1406                 /* find macros in this token and replace them */
1407                 process_macros (token, finaltoken);
1408
1409                 /* Extract arguments */
1410                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1411                         rc = -1;        /* no command at all */
1412                         continue;
1413                 }
1414
1415                 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1416                         rc = -1;
1417
1418                 /* Did the user stop this? */
1419                 if (had_ctrlc ())
1420                         return -1;      /* if stopped then not repeatable */
1421         }
1422
1423         return rc ? rc : repeatable;
1424 }
1425 #endif
1426
1427 /*
1428  * Run a command using the selected parser.
1429  *
1430  * @param cmd   Command to run
1431  * @param flag  Execution flags (CMD_FLAG_...)
1432  * @return 0 on success, or != 0 on error.
1433  */
1434 int run_command(const char *cmd, int flag)
1435 {
1436 #ifndef CONFIG_SYS_HUSH_PARSER
1437         /*
1438          * builtin_run_command can return 0 or 1 for success, so clean up
1439          * its result.
1440          */
1441         if (builtin_run_command(cmd, flag) == -1)
1442                 return 1;
1443
1444         return 0;
1445 #else
1446         return parse_string_outer(cmd,
1447                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1448 #endif
1449 }
1450
1451 #ifndef CONFIG_SYS_HUSH_PARSER
1452 /**
1453  * Execute a list of command separated by ; or \n using the built-in parser.
1454  *
1455  * This function cannot take a const char * for the command, since if it
1456  * finds newlines in the string, it replaces them with \0.
1457  *
1458  * @param cmd   String containing list of commands
1459  * @param flag  Execution flags (CMD_FLAG_...)
1460  * @return 0 on success, or != 0 on error.
1461  */
1462 static int builtin_run_command_list(char *cmd, int flag)
1463 {
1464         char *line, *next;
1465         int rcode = 0;
1466
1467         /*
1468          * Break into individual lines, and execute each line; terminate on
1469          * error.
1470          */
1471         line = next = cmd;
1472         while (*next) {
1473                 if (*next == '\n') {
1474                         *next = '\0';
1475                         /* run only non-empty commands */
1476                         if (*line) {
1477                                 debug("** exec: \"%s\"\n", line);
1478                                 if (builtin_run_command(line, 0) < 0) {
1479                                         rcode = 1;
1480                                         break;
1481                                 }
1482                         }
1483                         line = next + 1;
1484                 }
1485                 ++next;
1486         }
1487         if (rcode == 0 && *line)
1488                 rcode = (builtin_run_command(line, 0) >= 0);
1489
1490         return rcode;
1491 }
1492 #endif
1493
1494 int run_command_list(const char *cmd, int len, int flag)
1495 {
1496         int need_buff = 1;
1497         char *buff = (char *)cmd;       /* cast away const */
1498         int rcode = 0;
1499
1500         if (len == -1) {
1501                 len = strlen(cmd);
1502 #ifdef CONFIG_SYS_HUSH_PARSER
1503                 /* hush will never change our string */
1504                 need_buff = 0;
1505 #else
1506                 /* the built-in parser will change our string if it sees \n */
1507                 need_buff = strchr(cmd, '\n') != NULL;
1508 #endif
1509         }
1510         if (need_buff) {
1511                 buff = malloc(len + 1);
1512                 if (!buff)
1513                         return 1;
1514                 memcpy(buff, cmd, len);
1515                 buff[len] = '\0';
1516         }
1517 #ifdef CONFIG_SYS_HUSH_PARSER
1518         rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1519 #else
1520         /*
1521          * This function will overwrite any \n it sees with a \0, which
1522          * is why it can't work with a const char *. Here we are making
1523          * using of internal knowledge of this function, to avoid always
1524          * doing a malloc() which is actually required only in a case that
1525          * is pretty rare.
1526          */
1527         rcode = builtin_run_command_list(buff, flag);
1528         if (need_buff)
1529                 free(buff);
1530 #endif
1531
1532         return rcode;
1533 }
1534
1535 /****************************************************************************/
1536
1537 #if defined(CONFIG_CMD_RUN)
1538 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1539 {
1540         int i;
1541
1542         if (argc < 2)
1543                 return CMD_RET_USAGE;
1544
1545         for (i=1; i<argc; ++i) {
1546                 char *arg;
1547
1548                 if ((arg = getenv (argv[i])) == NULL) {
1549                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1550                         return 1;
1551                 }
1552
1553                 if (run_command(arg, flag) != 0)
1554                         return 1;
1555         }
1556         return 0;
1557 }
1558 #endif