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 #ifdef CONFIG_MODEM_SUPPORT
 431         debug("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 432         if (do_mdm_init) {
 433                 char *str = strdup(getenv("mdm_cmd"));
 434                 setenv("preboot", str);  /* set or delete definition */
 435                 if (str != NULL)
 436                         free(str);
 437                 mdm_init(); /* wait for modem connection */
 438         }
 439 #endif  /* CONFIG_MODEM_SUPPORT */
 440
 441 #ifdef CONFIG_VERSION_VARIABLE
 442         {
 443                 setenv("ver", version_string);  /* set version variable */
 444         }
 445 #endif /* CONFIG_VERSION_VARIABLE */
 446
 447 #ifdef CONFIG_SYS_HUSH_PARSER
 448         u_boot_hush_start();
 449 #endif
 450
 451 #if defined(CONFIG_HUSH_INIT_VAR)
 452         hush_init_var();
 453 #endif
 454
 455 #ifdef CONFIG_PREBOOT
 456         p = getenv("preboot");
 457         if (p != NULL) {
 458 # ifdef CONFIG_AUTOBOOT_KEYED
 459                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 460 # endif
 461
 462                 run_command_list(p, -1, 0);
 463
 464 # ifdef CONFIG_AUTOBOOT_KEYED
 465                 disable_ctrlc(prev);    /* restore Control C checking */
 466 # endif
 467         }
 468 #endif /* CONFIG_PREBOOT */
 469
 470 #if defined(CONFIG_UPDATE_TFTP)
 471         update_tftp(0UL);
 472 #endif /* CONFIG_UPDATE_TFTP */
 473
 474 #ifdef CONFIG_BOOTDELAY
 475         process_boot_delay();
 476 #endif
 477         /*
 478          * Main Loop for Monitor Command Processing
 479          */
 480 #ifdef CONFIG_SYS_HUSH_PARSER
 481         parse_file_outer();
 482         /* This point is never reached */
 483         for (;;);
 484 #else
 485         for (;;) {
 486 #ifdef CONFIG_BOOT_RETRY_TIME
 487                 if (rc >= 0) {
 488                         /* Saw enough of a valid command to
 489                          * restart the timeout.
 490                          */
 491                         reset_cmd_timeout();
 492                 }
 493 #endif
 494                 len = readline (CONFIG_SYS_PROMPT);
 495
 496                 flag = 0;       /* assume no special flags for now */
 497                 if (len > 0)
 498                         strcpy (lastcommand, console_buffer);
 499                 else if (len == 0)
 500                         flag |= CMD_FLAG_REPEAT;
 501 #ifdef CONFIG_BOOT_RETRY_TIME
 502                 else if (len == -2) {
 503                         /* -2 means timed out, retry autoboot
 504                          */
 505                         puts ("\nTimed out waiting for command\n");
 506 # ifdef CONFIG_RESET_TO_RETRY
 507                         /* Reinit board to run initialization code again */
 508                         do_reset (NULL, 0, 0, NULL);
 509 # else
 510                         return;         /* retry autoboot */
 511 # endif
 512                 }
 513 #endif
 514
 515                 if (len == -1)
 516                         puts ("<INTERRUPT>\n");
 517                 else
 518                         rc = run_command(lastcommand, flag);
 519
 520                 if (rc <= 0) {
 521                         /* invalid command or not repeatable, forget it */
 522                         lastcommand[0] = 0;
 523                 }
 524         }
 525 #endif /*CONFIG_SYS_HUSH_PARSER*/
 526 }
 527
 528 #ifdef CONFIG_BOOT_RETRY_TIME
 529 /***************************************************************************
 530  * initialize command line timeout
 531  */
 532 void init_cmd_timeout(void)
 533 {
 534         char *s = getenv ("bootretry");
 535
 536         if (s != NULL)
 537                 retry_time = (int)simple_strtol(s, NULL, 10);
 538         else
 539                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 540
 541         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 542                 retry_time = CONFIG_BOOT_RETRY_MIN;
 543 }
 544
 545 /***************************************************************************
 546  * reset command line timeout to retry_time seconds
 547  */
 548 void reset_cmd_timeout(void)
 549 {
 550         endtime = endtick(retry_time);
 551 }
 552 #endif
 553
 554 #ifdef CONFIG_CMDLINE_EDITING
 555
 556 /*
 557  * cmdline-editing related codes from vivi.
 558  * Author: Janghoon Lyu <nandy@mizi.com>
 559  */
 560
 561 #define putnstr(str,n)  do {                    \
 562                 printf ("%.*s", (int)n, str);   \
 563         } while (0)
 564
 565 #define CTL_CH(c)               ((c) - 'a' + 1)
 566 #define CTL_BACKSPACE           ('\b')
 567 #define DEL                     ((char)255)
 568 #define DEL7                    ((char)127)
 569 #define CREAD_HIST_CHAR         ('!')
 570
 571 #define getcmd_putch(ch)        putc(ch)
 572 #define getcmd_getch()          getc()
 573 #define getcmd_cbeep()          getcmd_putch('\a')
 574
 575 #define HIST_MAX                20
 576 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 577
 578 static int hist_max;
 579 static int hist_add_idx;
 580 static int hist_cur = -1;
 581 static unsigned hist_num;
 582
 583 static char *hist_list[HIST_MAX];
 584 static char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 585
 586 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 587
 588 static void hist_init(void)
 589 {
 590         int i;
 591
 592         hist_max = 0;
 593         hist_add_idx = 0;
 594         hist_cur = -1;
 595         hist_num = 0;
 596
 597         for (i = 0; i < HIST_MAX; i++) {
 598                 hist_list[i] = hist_lines[i];
 599                 hist_list[i][0] = '\0';
 600         }
 601 }
 602
 603 static void cread_add_to_hist(char *line)
 604 {
 605         strcpy(hist_list[hist_add_idx], line);
 606
 607         if (++hist_add_idx >= HIST_MAX)
 608                 hist_add_idx = 0;
 609
 610         if (hist_add_idx > hist_max)
 611                 hist_max = hist_add_idx;
 612
 613         hist_num++;
 614 }
 615
 616 static char* hist_prev(void)
 617 {
 618         char *ret;
 619         int old_cur;
 620
 621         if (hist_cur < 0)
 622                 return NULL;
 623
 624         old_cur = hist_cur;
 625         if (--hist_cur < 0)
 626                 hist_cur = hist_max;
 627
 628         if (hist_cur == hist_add_idx) {
 629                 hist_cur = old_cur;
 630                 ret = NULL;
 631         } else
 632                 ret = hist_list[hist_cur];
 633
 634         return (ret);
 635 }
 636
 637 static char* hist_next(void)
 638 {
 639         char *ret;
 640
 641         if (hist_cur < 0)
 642                 return NULL;
 643
 644         if (hist_cur == hist_add_idx)
 645                 return NULL;
 646
 647         if (++hist_cur > hist_max)
 648                 hist_cur = 0;
 649
 650         if (hist_cur == hist_add_idx) {
 651                 ret = "";
 652         } else
 653                 ret = hist_list[hist_cur];
 654
 655         return (ret);
 656 }
 657
 658 #ifndef CONFIG_CMDLINE_EDITING
 659 static void cread_print_hist_list(void)
 660 {
 661         int i;
 662         unsigned long n;
 663
 664         n = hist_num - hist_max;
 665
 666         i = hist_add_idx + 1;
 667         while (1) {
 668                 if (i > hist_max)
 669                         i = 0;
 670                 if (i == hist_add_idx)
 671                         break;
 672                 printf("%s\n", hist_list[i]);
 673                 n++;
 674                 i++;
 675         }
 676 }
 677 #endif /* CONFIG_CMDLINE_EDITING */
 678
 679 #define BEGINNING_OF_LINE() {                   \
 680         while (num) {                           \
 681                 getcmd_putch(CTL_BACKSPACE);    \
 682                 num--;                          \
 683         }                                       \
 684 }
 685
 686 #define ERASE_TO_EOL() {                                \
 687         if (num < eol_num) {                            \
 688                 printf("%*s", (int)(eol_num - num), ""); \
 689                 do {                                    \
 690                         getcmd_putch(CTL_BACKSPACE);    \
 691                 } while (--eol_num > num);              \
 692         }                                               \
 693 }
 694
 695 #define REFRESH_TO_EOL() {                      \
 696         if (num < eol_num) {                    \
 697                 wlen = eol_num - num;           \
 698                 putnstr(buf + num, wlen);       \
 699                 num = eol_num;                  \
 700         }                                       \
 701 }
 702
 703 static void cread_add_char(char ichar, int insert, unsigned long *num,
 704                unsigned long *eol_num, char *buf, unsigned long len)
 705 {
 706         unsigned long wlen;
 707
 708         /* room ??? */
 709         if (insert || *num == *eol_num) {
 710                 if (*eol_num > len - 1) {
 711                         getcmd_cbeep();
 712                         return;
 713                 }
 714                 (*eol_num)++;
 715         }
 716
 717         if (insert) {
 718                 wlen = *eol_num - *num;
 719                 if (wlen > 1) {
 720                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 721                 }
 722
 723                 buf[*num] = ichar;
 724                 putnstr(buf + *num, wlen);
 725                 (*num)++;
 726                 while (--wlen) {
 727                         getcmd_putch(CTL_BACKSPACE);
 728                 }
 729         } else {
 730                 /* echo the character */
 731                 wlen = 1;
 732                 buf[*num] = ichar;
 733                 putnstr(buf + *num, wlen);
 734                 (*num)++;
 735         }
 736 }
 737
 738 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 739               unsigned long *eol_num, char *buf, unsigned long len)
 740 {
 741         while (strsize--) {
 742                 cread_add_char(*str, insert, num, eol_num, buf, len);
 743                 str++;
 744         }
 745 }
 746
 747 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
 748                 int timeout)
 749 {
 750         unsigned long num = 0;
 751         unsigned long eol_num = 0;
 752         unsigned long wlen;
 753         char ichar;
 754         int insert = 1;
 755         int esc_len = 0;
 756         char esc_save[8];
 757         int init_len = strlen(buf);
 758         int first = 1;
 759
 760         if (init_len)
 761                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 762
 763         while (1) {
 764 #ifdef CONFIG_BOOT_RETRY_TIME
 765                 while (!tstc()) {       /* while no incoming data */
 766                         if (retry_time >= 0 && get_ticks() > endtime)
 767                                 return (-2);    /* timed out */
 768                         WATCHDOG_RESET();
 769                 }
 770 #endif
 771                 if (first && timeout) {
 772                         uint64_t etime = endtick(timeout);
 773
 774                         while (!tstc()) {       /* while no incoming data */
 775                                 if (get_ticks() >= etime)
 776                                         return -2;      /* timed out */
 777                                 WATCHDOG_RESET();
 778                         }
 779                         first = 0;
 780                 }
 781
 782                 ichar = getcmd_getch();
 783
 784                 if ((ichar == '\n') || (ichar == '\r')) {
 785                         putc('\n');
 786                         break;
 787                 }
 788
 789                 /*
 790                  * handle standard linux xterm esc sequences for arrow key, etc.
 791                  */
 792                 if (esc_len != 0) {
 793                         if (esc_len == 1) {
 794                                 if (ichar == '[') {
 795                                         esc_save[esc_len] = ichar;
 796                                         esc_len = 2;
 797                                 } else {
 798                                         cread_add_str(esc_save, esc_len, insert,
 799                                                       &num, &eol_num, buf, *len);
 800                                         esc_len = 0;
 801                                 }
 802                                 continue;
 803                         }
 804
 805                         switch (ichar) {
 806
 807                         case 'D':       /* <- key */
 808                                 ichar = CTL_CH('b');
 809                                 esc_len = 0;
 810                                 break;
 811                         case 'C':       /* -> key */
 812                                 ichar = CTL_CH('f');
 813                                 esc_len = 0;
 814                                 break;  /* pass off to ^F handler */
 815                         case 'H':       /* Home key */
 816                                 ichar = CTL_CH('a');
 817                                 esc_len = 0;
 818                                 break;  /* pass off to ^A handler */
 819                         case 'A':       /* up arrow */
 820                                 ichar = CTL_CH('p');
 821                                 esc_len = 0;
 822                                 break;  /* pass off to ^P handler */
 823                         case 'B':       /* down arrow */
 824                                 ichar = CTL_CH('n');
 825                                 esc_len = 0;
 826                                 break;  /* pass off to ^N handler */
 827                         default:
 828                                 esc_save[esc_len++] = ichar;
 829                                 cread_add_str(esc_save, esc_len, insert,
 830                                               &num, &eol_num, buf, *len);
 831                                 esc_len = 0;
 832                                 continue;
 833                         }
 834                 }
 835
 836                 switch (ichar) {
 837                 case 0x1b:
 838                         if (esc_len == 0) {
 839                                 esc_save[esc_len] = ichar;
 840                                 esc_len = 1;
 841                         } else {
 842                                 puts("impossible condition #876\n");
 843                                 esc_len = 0;
 844                         }
 845                         break;
 846
 847                 case CTL_CH('a'):
 848                         BEGINNING_OF_LINE();
 849                         break;
 850                 case CTL_CH('c'):       /* ^C - break */
 851                         *buf = '\0';    /* discard input */
 852                         return (-1);
 853                 case CTL_CH('f'):
 854                         if (num < eol_num) {
 855                                 getcmd_putch(buf[num]);
 856                                 num++;
 857                         }
 858                         break;
 859                 case CTL_CH('b'):
 860                         if (num) {
 861                                 getcmd_putch(CTL_BACKSPACE);
 862                                 num--;
 863                         }
 864                         break;
 865                 case CTL_CH('d'):
 866                         if (num < eol_num) {
 867                                 wlen = eol_num - num - 1;
 868                                 if (wlen) {
 869                                         memmove(&buf[num], &buf[num+1], wlen);
 870                                         putnstr(buf + num, wlen);
 871                                 }
 872
 873                                 getcmd_putch(' ');
 874                                 do {
 875                                         getcmd_putch(CTL_BACKSPACE);
 876                                 } while (wlen--);
 877                                 eol_num--;
 878                         }
 879                         break;
 880                 case CTL_CH('k'):
 881                         ERASE_TO_EOL();
 882                         break;
 883                 case CTL_CH('e'):
 884                         REFRESH_TO_EOL();
 885                         break;
 886                 case CTL_CH('o'):
 887                         insert = !insert;
 888                         break;
 889                 case CTL_CH('x'):
 890                 case CTL_CH('u'):
 891                         BEGINNING_OF_LINE();
 892                         ERASE_TO_EOL();
 893                         break;
 894                 case DEL:
 895                 case DEL7:
 896                 case 8:
 897                         if (num) {
 898                                 wlen = eol_num - num;
 899                                 num--;
 900                                 memmove(&buf[num], &buf[num+1], wlen);
 901                                 getcmd_putch(CTL_BACKSPACE);
 902                                 putnstr(buf + num, wlen);
 903                                 getcmd_putch(' ');
 904                                 do {
 905                                         getcmd_putch(CTL_BACKSPACE);
 906                                 } while (wlen--);
 907                                 eol_num--;
 908                         }
 909                         break;
 910                 case CTL_CH('p'):
 911                 case CTL_CH('n'):
 912                 {
 913                         char * hline;
 914
 915                         esc_len = 0;
 916
 917                         if (ichar == CTL_CH('p'))
 918                                 hline = hist_prev();
 919                         else
 920                                 hline = hist_next();
 921
 922                         if (!hline) {
 923                                 getcmd_cbeep();
 924                                 continue;
 925                         }
 926
 927                         /* nuke the current line */
 928                         /* first, go home */
 929                         BEGINNING_OF_LINE();
 930
 931                         /* erase to end of line */
 932                         ERASE_TO_EOL();
 933
 934                         /* copy new line into place and display */
 935                         strcpy(buf, hline);
 936                         eol_num = strlen(buf);
 937                         REFRESH_TO_EOL();
 938                         continue;
 939                 }
 940 #ifdef CONFIG_AUTO_COMPLETE
 941                 case '\t': {
 942                         int num2, col;
 943
 944                         /* do not autocomplete when in the middle */
 945                         if (num < eol_num) {
 946                                 getcmd_cbeep();
 947                                 break;
 948                         }
 949
 950                         buf[num] = '\0';
 951                         col = strlen(prompt) + eol_num;
 952                         num2 = num;
 953                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 954                                 col = num2 - num;
 955                                 num += col;
 956                                 eol_num += col;
 957                         }
 958                         break;
 959                 }
 960 #endif
 961                 default:
 962                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 963                         break;
 964                 }
 965         }
 966         *len = eol_num;
 967         buf[eol_num] = '\0';    /* lose the newline */
 968
 969         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 970                 cread_add_to_hist(buf);
 971         hist_cur = hist_add_idx;
 972
 973         return 0;
 974 }
 975
 976 #endif /* CONFIG_CMDLINE_EDITING */
 977
 978 /****************************************************************************/
 979
 980 /*
 981  * Prompt for input and read a line.
 982  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 983  * time out when time goes past endtime (timebase time in ticks).
 984  * Return:      number of read characters
 985  *              -1 if break
 986  *              -2 if timed out
 987  */
 988 int readline (const char *const prompt)
 989 {
 990         /*
 991          * If console_buffer isn't 0-length the user will be prompted to modify
 992          * it instead of entering it from scratch as desired.
 993          */
 994         console_buffer[0] = '\0';
 995
 996         return readline_into_buffer(prompt, console_buffer, 0);
 997 }
 998
 999
1000 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1001 {
1002         char *p = buffer;
1003 #ifdef CONFIG_CMDLINE_EDITING
1004         unsigned int len = CONFIG_SYS_CBSIZE;
1005         int rc;
1006         static int initted = 0;
1007
1008         /*
1009          * History uses a global array which is not
1010          * writable until after relocation to RAM.
1011          * Revert to non-history version if still
1012          * running from flash.
1013          */
1014         if (gd->flags & GD_FLG_RELOC) {
1015                 if (!initted) {
1016                         hist_init();
1017                         initted = 1;
1018                 }
1019
1020                 if (prompt)
1021                         puts (prompt);
1022
1023                 rc = cread_line(prompt, p, &len, timeout);
1024                 return rc < 0 ? rc : len;
1025
1026         } else {
1027 #endif  /* CONFIG_CMDLINE_EDITING */
1028         char * p_buf = p;
1029         int     n = 0;                          /* buffer index         */
1030         int     plen = 0;                       /* prompt length        */
1031         int     col;                            /* output column cnt    */
1032         char    c;
1033
1034         /* print prompt */
1035         if (prompt) {
1036                 plen = strlen (prompt);
1037                 puts (prompt);
1038         }
1039         col = plen;
1040
1041         for (;;) {
1042 #ifdef CONFIG_BOOT_RETRY_TIME
1043                 while (!tstc()) {       /* while no incoming data */
1044                         if (retry_time >= 0 && get_ticks() > endtime)
1045                                 return (-2);    /* timed out */
1046                         WATCHDOG_RESET();
1047                 }
1048 #endif
1049                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
1050
1051 #ifdef CONFIG_SHOW_ACTIVITY
1052                 while (!tstc()) {
1053                         show_activity(0);
1054                         WATCHDOG_RESET();
1055                 }
1056 #endif
1057                 c = getc();
1058
1059                 /*
1060                  * Special character handling
1061                  */
1062                 switch (c) {
1063                 case '\r':                      /* Enter                */
1064                 case '\n':
1065                         *p = '\0';
1066                         puts ("\r\n");
1067                         return p - p_buf;
1068
1069                 case '\0':                      /* nul                  */
1070                         continue;
1071
1072                 case 0x03:                      /* ^C - break           */
1073                         p_buf[0] = '\0';        /* discard input */
1074                         return -1;
1075
1076                 case 0x15:                      /* ^U - erase line      */
1077                         while (col > plen) {
1078                                 puts (erase_seq);
1079                                 --col;
1080                         }
1081                         p = p_buf;
1082                         n = 0;
1083                         continue;
1084
1085                 case 0x17:                      /* ^W - erase word      */
1086                         p=delete_char(p_buf, p, &col, &n, plen);
1087                         while ((n > 0) && (*p != ' ')) {
1088                                 p=delete_char(p_buf, p, &col, &n, plen);
1089                         }
1090                         continue;
1091
1092                 case 0x08:                      /* ^H  - backspace      */
1093                 case 0x7F:                      /* DEL - backspace      */
1094                         p=delete_char(p_buf, p, &col, &n, plen);
1095                         continue;
1096
1097                 default:
1098                         /*
1099                          * Must be a normal character then
1100                          */
1101                         if (n < CONFIG_SYS_CBSIZE-2) {
1102                                 if (c == '\t') {        /* expand TABs */
1103 #ifdef CONFIG_AUTO_COMPLETE
1104                                         /* if auto completion triggered just continue */
1105                                         *p = '\0';
1106                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1107                                                 p = p_buf + n;  /* reset */
1108                                                 continue;
1109                                         }
1110 #endif
1111                                         puts (tab_seq+(col&07));
1112                                         col += 8 - (col&07);
1113                                 } else {
1114                                         char buf[2];
1115
1116                                         /*
1117                                          * Echo input using puts() to force an
1118                                          * LCD flush if we are using an LCD
1119                                          */
1120                                         ++col;
1121                                         buf[0] = c;
1122                                         buf[1] = '\0';
1123                                         puts(buf);
1124                                 }
1125                                 *p++ = c;
1126                                 ++n;
1127                         } else {                        /* Buffer full          */
1128                                 putc ('\a');
1129                         }
1130                 }
1131         }
1132 #ifdef CONFIG_CMDLINE_EDITING
1133         }
1134 #endif
1135 }
1136
1137 /****************************************************************************/
1138
1139 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1140 {
1141         char *s;
1142
1143         if (*np == 0) {
1144                 return (p);
1145         }
1146
1147         if (*(--p) == '\t') {                   /* will retype the whole line   */
1148                 while (*colp > plen) {
1149                         puts (erase_seq);
1150                         (*colp)--;
1151                 }
1152                 for (s=buffer; s<p; ++s) {
1153                         if (*s == '\t') {
1154                                 puts (tab_seq+((*colp) & 07));
1155                                 *colp += 8 - ((*colp) & 07);
1156                         } else {
1157                                 ++(*colp);
1158                                 putc (*s);
1159                         }
1160                 }
1161         } else {
1162                 puts (erase_seq);
1163                 (*colp)--;
1164         }
1165         (*np)--;
1166         return (p);
1167 }
1168
1169 /****************************************************************************/
1170
1171 int parse_line (char *line, char *argv[])
1172 {
1173         int nargs = 0;
1174
1175         debug_parser("parse_line: \"%s\"\n", line);
1176         while (nargs < CONFIG_SYS_MAXARGS) {
1177
1178                 /* skip any white space */
1179                 while (isblank(*line))
1180                         ++line;
1181
1182                 if (*line == '\0') {    /* end of line, no more args    */
1183                         argv[nargs] = NULL;
1184                         debug_parser("parse_line: nargs=%d\n", nargs);
1185                         return nargs;
1186                 }
1187
1188                 argv[nargs++] = line;   /* begin of argument string     */
1189
1190                 /* find end of string */
1191                 while (*line && !isblank(*line))
1192                         ++line;
1193
1194                 if (*line == '\0') {    /* end of line, no more args    */
1195                         argv[nargs] = NULL;
1196                         debug_parser("parse_line: nargs=%d\n", nargs);
1197                         return nargs;
1198                 }
1199
1200                 *line++ = '\0';         /* terminate current arg         */
1201         }
1202
1203         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1204
1205         debug_parser("parse_line: nargs=%d\n", nargs);
1206         return (nargs);
1207 }
1208
1209 /****************************************************************************/
1210
1211 #ifndef CONFIG_SYS_HUSH_PARSER
1212 static void process_macros (const char *input, char *output)
1213 {
1214         char c, prev;
1215         const char *varname_start = NULL;
1216         int inputcnt = strlen (input);
1217         int outputcnt = CONFIG_SYS_CBSIZE;
1218         int state = 0;          /* 0 = waiting for '$'  */
1219
1220         /* 1 = waiting for '(' or '{' */
1221         /* 2 = waiting for ')' or '}' */
1222         /* 3 = waiting for '''  */
1223         char *output_start = output;
1224
1225         debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
1226                      input);
1227
1228         prev = '\0';            /* previous character   */
1229
1230         while (inputcnt && outputcnt) {
1231                 c = *input++;
1232                 inputcnt--;
1233
1234                 if (state != 3) {
1235                         /* remove one level of escape characters */
1236                         if ((c == '\\') && (prev != '\\')) {
1237                                 if (inputcnt-- == 0)
1238                                         break;
1239                                 prev = c;
1240                                 c = *input++;
1241                         }
1242                 }
1243
1244                 switch (state) {
1245                 case 0: /* Waiting for (unescaped) $    */
1246                         if ((c == '\'') && (prev != '\\')) {
1247                                 state = 3;
1248                                 break;
1249                         }
1250                         if ((c == '$') && (prev != '\\')) {
1251                                 state++;
1252                         } else {
1253                                 *(output++) = c;
1254                                 outputcnt--;
1255                         }
1256                         break;
1257                 case 1: /* Waiting for (        */
1258                         if (c == '(' || c == '{') {
1259                                 state++;
1260                                 varname_start = input;
1261                         } else {
1262                                 state = 0;
1263                                 *(output++) = '$';
1264                                 outputcnt--;
1265
1266                                 if (outputcnt) {
1267                                         *(output++) = c;
1268                                         outputcnt--;
1269                                 }
1270                         }
1271                         break;
1272                 case 2: /* Waiting for )        */
1273                         if (c == ')' || c == '}') {
1274                                 int i;
1275                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1276                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1277
1278                                 /* Get the varname */
1279                                 for (i = 0; i < envcnt; i++) {
1280                                         envname[i] = varname_start[i];
1281                                 }
1282                                 envname[i] = 0;
1283
1284                                 /* Get its value */
1285                                 envval = getenv (envname);
1286
1287                                 /* Copy into the line if it exists */
1288                                 if (envval != NULL)
1289                                         while ((*envval) && outputcnt) {
1290                                                 *(output++) = *(envval++);
1291                                                 outputcnt--;
1292                                         }
1293                                 /* Look for another '$' */
1294                                 state = 0;
1295                         }
1296                         break;
1297                 case 3: /* Waiting for '        */
1298                         if ((c == '\'') && (prev != '\\')) {
1299                                 state = 0;
1300                         } else {
1301                                 *(output++) = c;
1302                                 outputcnt--;
1303                         }
1304                         break;
1305                 }
1306                 prev = c;
1307         }
1308
1309         if (outputcnt)
1310                 *output = 0;
1311         else
1312                 *(output - 1) = 0;
1313
1314         debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1315                      strlen(output_start), output_start);
1316 }
1317
1318 /****************************************************************************
1319  * returns:
1320  *      1  - command executed, repeatable
1321  *      0  - command executed but not repeatable, interrupted commands are
1322  *           always considered not repeatable
1323  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1324  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1325  *           considered unrecognized)
1326  *
1327  * WARNING:
1328  *
1329  * We must create a temporary copy of the command since the command we get
1330  * may be the result from getenv(), which returns a pointer directly to
1331  * the environment data, which may change magicly when the command we run
1332  * creates or modifies environment variables (like "bootp" does).
1333  */
1334 static int builtin_run_command(const char *cmd, int flag)
1335 {
1336         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1337         char *token;                    /* start of token in cmdbuf     */
1338         char *sep;                      /* end of token (separator) in cmdbuf */
1339         char finaltoken[CONFIG_SYS_CBSIZE];
1340         char *str = cmdbuf;
1341         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1342         int argc, inquotes;
1343         int repeatable = 1;
1344         int rc = 0;
1345
1346         debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
1347         if (DEBUG_PARSER) {
1348                 /* use puts - string may be loooong */
1349                 puts(cmd ? cmd : "NULL");
1350                 puts("\"\n");
1351         }
1352         clear_ctrlc();          /* forget any previous Control C */
1353
1354         if (!cmd || !*cmd) {
1355                 return -1;      /* empty command */
1356         }
1357
1358         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1359                 puts ("## Command too long!\n");
1360                 return -1;
1361         }
1362
1363         strcpy (cmdbuf, cmd);
1364
1365         /* Process separators and check for invalid
1366          * repeatable commands
1367          */
1368
1369         debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
1370         while (*str) {
1371
1372                 /*
1373                  * Find separator, or string end
1374                  * Allow simple escape of ';' by writing "\;"
1375                  */
1376                 for (inquotes = 0, sep = str; *sep; sep++) {
1377                         if ((*sep=='\'') &&
1378                             (*(sep-1) != '\\'))
1379                                 inquotes=!inquotes;
1380
1381                         if (!inquotes &&
1382                             (*sep == ';') &&    /* separator            */
1383                             ( sep != str) &&    /* past string start    */
1384                             (*(sep-1) != '\\')) /* and NOT escaped      */
1385                                 break;
1386                 }
1387
1388                 /*
1389                  * Limit the token to data between separators
1390                  */
1391                 token = str;
1392                 if (*sep) {
1393                         str = sep + 1;  /* start of command for next pass */
1394                         *sep = '\0';
1395                 }
1396                 else
1397                         str = sep;      /* no more commands for next pass */
1398                 debug_parser("token: \"%s\"\n", token);
1399
1400                 /* find macros in this token and replace them */
1401                 process_macros (token, finaltoken);
1402
1403                 /* Extract arguments */
1404                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1405                         rc = -1;        /* no command at all */
1406                         continue;
1407                 }
1408
1409                 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1410                         rc = -1;
1411
1412                 /* Did the user stop this? */
1413                 if (had_ctrlc ())
1414                         return -1;      /* if stopped then not repeatable */
1415         }
1416
1417         return rc ? rc : repeatable;
1418 }
1419 #endif
1420
1421 /*
1422  * Run a command using the selected parser.
1423  *
1424  * @param cmd   Command to run
1425  * @param flag  Execution flags (CMD_FLAG_...)
1426  * @return 0 on success, or != 0 on error.
1427  */
1428 int run_command(const char *cmd, int flag)
1429 {
1430 #ifndef CONFIG_SYS_HUSH_PARSER
1431         /*
1432          * builtin_run_command can return 0 or 1 for success, so clean up
1433          * its result.
1434          */
1435         if (builtin_run_command(cmd, flag) == -1)
1436                 return 1;
1437
1438         return 0;
1439 #else
1440         return parse_string_outer(cmd,
1441                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1442 #endif
1443 }
1444
1445 #ifndef CONFIG_SYS_HUSH_PARSER
1446 /**
1447  * Execute a list of command separated by ; or \n using the built-in parser.
1448  *
1449  * This function cannot take a const char * for the command, since if it
1450  * finds newlines in the string, it replaces them with \0.
1451  *
1452  * @param cmd   String containing list of commands
1453  * @param flag  Execution flags (CMD_FLAG_...)
1454  * @return 0 on success, or != 0 on error.
1455  */
1456 static int builtin_run_command_list(char *cmd, int flag)
1457 {
1458         char *line, *next;
1459         int rcode = 0;
1460
1461         /*
1462          * Break into individual lines, and execute each line; terminate on
1463          * error.
1464          */
1465         line = next = cmd;
1466         while (*next) {
1467                 if (*next == '\n') {
1468                         *next = '\0';
1469                         /* run only non-empty commands */
1470                         if (*line) {
1471                                 debug("** exec: \"%s\"\n", line);
1472                                 if (builtin_run_command(line, 0) < 0) {
1473                                         rcode = 1;
1474                                         break;
1475                                 }
1476                         }
1477                         line = next + 1;
1478                 }
1479                 ++next;
1480         }
1481         if (rcode == 0 && *line)
1482                 rcode = (builtin_run_command(line, 0) >= 0);
1483
1484         return rcode;
1485 }
1486 #endif
1487
1488 int run_command_list(const char *cmd, int len, int flag)
1489 {
1490         int need_buff = 1;
1491         char *buff = (char *)cmd;       /* cast away const */
1492         int rcode = 0;
1493
1494         if (len == -1) {
1495                 len = strlen(cmd);
1496 #ifdef CONFIG_SYS_HUSH_PARSER
1497                 /* hush will never change our string */
1498                 need_buff = 0;
1499 #else
1500                 /* the built-in parser will change our string if it sees \n */
1501                 need_buff = strchr(cmd, '\n') != NULL;
1502 #endif
1503         }
1504         if (need_buff) {
1505                 buff = malloc(len + 1);
1506                 if (!buff)
1507                         return 1;
1508                 memcpy(buff, cmd, len);
1509                 buff[len] = '\0';
1510         }
1511 #ifdef CONFIG_SYS_HUSH_PARSER
1512         rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1513 #else
1514         /*
1515          * This function will overwrite any \n it sees with a \0, which
1516          * is why it can't work with a const char *. Here we are making
1517          * using of internal knowledge of this function, to avoid always
1518          * doing a malloc() which is actually required only in a case that
1519          * is pretty rare.
1520          */
1521         rcode = builtin_run_command_list(buff, flag);
1522         if (need_buff)
1523                 free(buff);
1524 #endif
1525
1526         return rcode;
1527 }
1528
1529 /****************************************************************************/
1530
1531 #if defined(CONFIG_CMD_RUN)
1532 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1533 {
1534         int i;
1535
1536         if (argc < 2)
1537                 return CMD_RET_USAGE;
1538
1539         for (i=1; i<argc; ++i) {
1540                 char *arg;
1541
1542                 if ((arg = getenv (argv[i])) == NULL) {
1543                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1544                         return 1;
1545                 }
1546
1547                 if (run_command(arg, flag) != 0)
1548                         return 1;
1549         }
1550         return 0;
1551 }
1552 #endif