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  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define      DEBUG   */
  29
  30 #include <common.h>
  31 #include <watchdog.h>
  32 #include <command.h>
  33 #ifdef CONFIG_MODEM_SUPPORT
  34 #include <malloc.h>             /* for free() prototype */
  35 #endif
  36
  37 #ifdef CONFIG_SYS_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  52
  53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
  54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);                /* for do_reset() prototype */
  55 #endif
  56
  57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
  58
  59 #if defined(CONFIG_UPDATE_TFTP)
  60 void update_tftp (void);
  61 #endif /* CONFIG_UPDATE_TFTP */
  62
  63 #define MAX_DELAY_STOP_STR 32
  64
  65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  66 static int abortboot(int);
  67 #endif
  68
  69 #undef DEBUG_PARSER
  70
  71 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  72
  73 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  74 static char erase_seq[] = "\b \b";              /* erase sequence       */
  75 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  76
  77 #ifdef CONFIG_BOOT_RETRY_TIME
  78 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  79 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  80 #endif
  81
  82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  83
  84 #ifndef CONFIG_BOOT_RETRY_MIN
  85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  86 #endif
  87
  88 #ifdef CONFIG_MODEM_SUPPORT
  89 int do_mdm_init = 0;
  90 extern void mdm_init(void); /* defined in board.c */
  91 #endif
  92
  93 /***************************************************************************
  94  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  95  * returns: 0 -  no key string, allow autoboot
  96  *          1 - got key string, abort
  97  */
  98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  99 # if defined(CONFIG_AUTOBOOT_KEYED)
 100 static __inline__ int abortboot(int bootdelay)
 101 {
 102         int abort = 0;
 103         uint64_t etime = endtick(bootdelay);
 104         struct {
 105                 char* str;
 106                 u_int len;
 107                 int retry;
 108         }
 109         delaykey [] = {
 110                 { str: getenv ("bootdelaykey"),  retry: 1 },
 111                 { str: getenv ("bootdelaykey2"), retry: 1 },
 112                 { str: getenv ("bootstopkey"),   retry: 0 },
 113                 { str: getenv ("bootstopkey2"),  retry: 0 },
 114         };
 115
 116         char presskey [MAX_DELAY_STOP_STR];
 117         u_int presskey_len = 0;
 118         u_int presskey_max = 0;
 119         u_int i;
 120
 121 #  ifdef CONFIG_AUTOBOOT_PROMPT
 122         printf(CONFIG_AUTOBOOT_PROMPT);
 123 #  endif
 124
 125 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 126         if (delaykey[0].str == NULL)
 127                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 128 #  endif
 129 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 130         if (delaykey[1].str == NULL)
 131                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 132 #  endif
 133 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 134         if (delaykey[2].str == NULL)
 135                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 136 #  endif
 137 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 138         if (delaykey[3].str == NULL)
 139                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 140 #  endif
 141
 142         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 143                 delaykey[i].len = delaykey[i].str == NULL ?
 144                                     0 : strlen (delaykey[i].str);
 145                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 146                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 147
 148                 presskey_max = presskey_max > delaykey[i].len ?
 149                                     presskey_max : delaykey[i].len;
 150
 151 #  if DEBUG_BOOTKEYS
 152                 printf("%s key:<%s>\n",
 153                        delaykey[i].retry ? "delay" : "stop",
 154                        delaykey[i].str ? delaykey[i].str : "NULL");
 155 #  endif
 156         }
 157
 158         /* In order to keep up with incoming data, check timeout only
 159          * when catch up.
 160          */
 161         do {
 162                 if (tstc()) {
 163                         if (presskey_len < presskey_max) {
 164                                 presskey [presskey_len ++] = getc();
 165                         }
 166                         else {
 167                                 for (i = 0; i < presskey_max - 1; i ++)
 168                                         presskey [i] = presskey [i + 1];
 169
 170                                 presskey [i] = getc();
 171                         }
 172                 }
 173
 174                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 175                         if (delaykey[i].len > 0 &&
 176                             presskey_len >= delaykey[i].len &&
 177                             memcmp (presskey + presskey_len - delaykey[i].len,
 178                                     delaykey[i].str,
 179                                     delaykey[i].len) == 0) {
 180 #  if DEBUG_BOOTKEYS
 181                                 printf("got %skey\n",
 182                                        delaykey[i].retry ? "delay" : "stop");
 183 #  endif
 184
 185 #  ifdef CONFIG_BOOT_RETRY_TIME
 186                                 /* don't retry auto boot */
 187                                 if (! delaykey[i].retry)
 188                                         retry_time = -1;
 189 #  endif
 190                                 abort = 1;
 191                         }
 192                 }
 193         } while (!abort && get_ticks() <= etime);
 194
 195 #  if DEBUG_BOOTKEYS
 196         if (!abort)
 197                 puts("key timeout\n");
 198 #  endif
 199
 200 #ifdef CONFIG_SILENT_CONSOLE
 201         if (abort)
 202                 gd->flags &= ~GD_FLG_SILENT;
 203 #endif
 204
 205         return abort;
 206 }
 207
 208 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 209
 210 #ifdef CONFIG_MENUKEY
 211 static int menukey = 0;
 212 #endif
 213
 214 static __inline__ int abortboot(int bootdelay)
 215 {
 216         int abort = 0;
 217
 218 #ifdef CONFIG_MENUPROMPT
 219         printf(CONFIG_MENUPROMPT);
 220 #else
 221         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 222 #endif
 223
 224 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 225         /*
 226          * Check if key already pressed
 227          * Don't check if bootdelay < 0
 228          */
 229         if (bootdelay >= 0) {
 230                 if (tstc()) {   /* we got a key press   */
 231                         (void) getc();  /* consume input        */
 232                         puts ("\b\b\b 0");
 233                         abort = 1;      /* don't auto boot      */
 234                 }
 235         }
 236 #endif
 237
 238         while ((bootdelay > 0) && (!abort)) {
 239                 int i;
 240
 241                 --bootdelay;
 242                 /* delay 100 * 10ms */
 243                 for (i=0; !abort && i<100; ++i) {
 244                         if (tstc()) {   /* we got a key press   */
 245                                 abort  = 1;     /* don't auto boot      */
 246                                 bootdelay = 0;  /* no more delay        */
 247 # ifdef CONFIG_MENUKEY
 248                                 menukey = getc();
 249 # else
 250                                 (void) getc();  /* consume input        */
 251 # endif
 252                                 break;
 253                         }
 254                         udelay(10000);
 255                 }
 256
 257                 printf("\b\b\b%2d ", bootdelay);
 258         }
 259
 260         putc('\n');
 261
 262 #ifdef CONFIG_SILENT_CONSOLE
 263         if (abort)
 264                 gd->flags &= ~GD_FLG_SILENT;
 265 #endif
 266
 267         return abort;
 268 }
 269 # endif /* CONFIG_AUTOBOOT_KEYED */
 270 #endif  /* CONFIG_BOOTDELAY >= 0  */
 271
 272 /****************************************************************************/
 273
 274 void main_loop (void)
 275 {
 276 #ifndef CONFIG_SYS_HUSH_PARSER
 277         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 278         int len;
 279         int rc = 1;
 280         int flag;
 281 #endif
 282
 283 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 284         char *s;
 285         int bootdelay;
 286 #endif
 287 #ifdef CONFIG_PREBOOT
 288         char *p;
 289 #endif
 290 #ifdef CONFIG_BOOTCOUNT_LIMIT
 291         unsigned long bootcount = 0;
 292         unsigned long bootlimit = 0;
 293         char *bcs;
 294         char bcs_set[16];
 295 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 296
 297 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 298         ulong bmp = 0;          /* default bitmap */
 299         extern int trab_vfd (ulong bitmap);
 300
 301 #ifdef CONFIG_MODEM_SUPPORT
 302         if (do_mdm_init)
 303                 bmp = 1;        /* alternate bitmap */
 304 #endif
 305         trab_vfd (bmp);
 306 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 307
 308 #ifdef CONFIG_BOOTCOUNT_LIMIT
 309         bootcount = bootcount_load();
 310         bootcount++;
 311         bootcount_store (bootcount);
 312         sprintf (bcs_set, "%lu", bootcount);
 313         setenv ("bootcount", bcs_set);
 314         bcs = getenv ("bootlimit");
 315         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 316 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 317
 318 #ifdef CONFIG_MODEM_SUPPORT
 319         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 320         if (do_mdm_init) {
 321                 char *str = strdup(getenv("mdm_cmd"));
 322                 setenv ("preboot", str);  /* set or delete definition */
 323                 if (str != NULL)
 324                         free (str);
 325                 mdm_init(); /* wait for modem connection */
 326         }
 327 #endif  /* CONFIG_MODEM_SUPPORT */
 328
 329 #ifdef CONFIG_VERSION_VARIABLE
 330         {
 331                 extern char version_string[];
 332
 333                 setenv ("ver", version_string);  /* set version variable */
 334         }
 335 #endif /* CONFIG_VERSION_VARIABLE */
 336
 337 #ifdef CONFIG_SYS_HUSH_PARSER
 338         u_boot_hush_start ();
 339 #endif
 340
 341 #if defined(CONFIG_HUSH_INIT_VAR)
 342         hush_init_var ();
 343 #endif
 344
 345 #ifdef CONFIG_AUTO_COMPLETE
 346         install_auto_complete();
 347 #endif
 348
 349 #ifdef CONFIG_PREBOOT
 350         if ((p = getenv ("preboot")) != NULL) {
 351 # ifdef CONFIG_AUTOBOOT_KEYED
 352                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 353 # endif
 354
 355 # ifndef CONFIG_SYS_HUSH_PARSER
 356                 run_command (p, 0);
 357 # else
 358                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 359                                     FLAG_EXIT_FROM_LOOP);
 360 # endif
 361
 362 # ifdef CONFIG_AUTOBOOT_KEYED
 363                 disable_ctrlc(prev);    /* restore Control C checking */
 364 # endif
 365         }
 366 #endif /* CONFIG_PREBOOT */
 367
 368 #if defined(CONFIG_UPDATE_TFTP)
 369         update_tftp ();
 370 #endif /* CONFIG_UPDATE_TFTP */
 371
 372 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 373         s = getenv ("bootdelay");
 374         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 375
 376         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 377
 378 # ifdef CONFIG_BOOT_RETRY_TIME
 379         init_cmd_timeout ();
 380 # endif /* CONFIG_BOOT_RETRY_TIME */
 381
 382 #ifdef CONFIG_POST
 383         if (gd->flags & GD_FLG_POSTFAIL) {
 384                 s = getenv("failbootcmd");
 385         }
 386         else
 387 #endif /* CONFIG_POST */
 388 #ifdef CONFIG_BOOTCOUNT_LIMIT
 389         if (bootlimit && (bootcount > bootlimit)) {
 390                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 391                         (unsigned)bootlimit);
 392                 s = getenv ("altbootcmd");
 393         }
 394         else
 395 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 396                 s = getenv ("bootcmd");
 397
 398         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 399
 400         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 401 # ifdef CONFIG_AUTOBOOT_KEYED
 402                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 403 # endif
 404
 405 # ifndef CONFIG_SYS_HUSH_PARSER
 406                 run_command (s, 0);
 407 # else
 408                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 409                                     FLAG_EXIT_FROM_LOOP);
 410 # endif
 411
 412 # ifdef CONFIG_AUTOBOOT_KEYED
 413                 disable_ctrlc(prev);    /* restore Control C checking */
 414 # endif
 415         }
 416
 417 # ifdef CONFIG_MENUKEY
 418         if (menukey == CONFIG_MENUKEY) {
 419             s = getenv("menucmd");
 420             if (s) {
 421 # ifndef CONFIG_SYS_HUSH_PARSER
 422                 run_command (s, 0);
 423 # else
 424                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 425                                     FLAG_EXIT_FROM_LOOP);
 426 # endif
 427             }
 428         }
 429 #endif /* CONFIG_MENUKEY */
 430 #endif /* CONFIG_BOOTDELAY */
 431
 432         /*
 433          * Main Loop for Monitor Command Processing
 434          */
 435 #ifdef CONFIG_SYS_HUSH_PARSER
 436         parse_file_outer();
 437         /* This point is never reached */
 438         for (;;);
 439 #else
 440         for (;;) {
 441 #ifdef CONFIG_BOOT_RETRY_TIME
 442                 if (rc >= 0) {
 443                         /* Saw enough of a valid command to
 444                          * restart the timeout.
 445                          */
 446                         reset_cmd_timeout();
 447                 }
 448 #endif
 449                 len = readline (CONFIG_SYS_PROMPT);
 450
 451                 flag = 0;       /* assume no special flags for now */
 452                 if (len > 0)
 453                         strcpy (lastcommand, console_buffer);
 454                 else if (len == 0)
 455                         flag |= CMD_FLAG_REPEAT;
 456 #ifdef CONFIG_BOOT_RETRY_TIME
 457                 else if (len == -2) {
 458                         /* -2 means timed out, retry autoboot
 459                          */
 460                         puts ("\nTimed out waiting for command\n");
 461 # ifdef CONFIG_RESET_TO_RETRY
 462                         /* Reinit board to run initialization code again */
 463                         do_reset (NULL, 0, 0, NULL);
 464 # else
 465                         return;         /* retry autoboot */
 466 # endif
 467                 }
 468 #endif
 469
 470                 if (len == -1)
 471                         puts ("<INTERRUPT>\n");
 472                 else
 473                         rc = run_command (lastcommand, flag);
 474
 475                 if (rc <= 0) {
 476                         /* invalid command or not repeatable, forget it */
 477                         lastcommand[0] = 0;
 478                 }
 479         }
 480 #endif /*CONFIG_SYS_HUSH_PARSER*/
 481 }
 482
 483 #ifdef CONFIG_BOOT_RETRY_TIME
 484 /***************************************************************************
 485  * initialize command line timeout
 486  */
 487 void init_cmd_timeout(void)
 488 {
 489         char *s = getenv ("bootretry");
 490
 491         if (s != NULL)
 492                 retry_time = (int)simple_strtol(s, NULL, 10);
 493         else
 494                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 495
 496         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 497                 retry_time = CONFIG_BOOT_RETRY_MIN;
 498 }
 499
 500 /***************************************************************************
 501  * reset command line timeout to retry_time seconds
 502  */
 503 void reset_cmd_timeout(void)
 504 {
 505         endtime = endtick(retry_time);
 506 }
 507 #endif
 508
 509 #ifdef CONFIG_CMDLINE_EDITING
 510
 511 /*
 512  * cmdline-editing related codes from vivi.
 513  * Author: Janghoon Lyu <nandy@mizi.com>
 514  */
 515
 516 #define putnstr(str,n)  do {                    \
 517                 printf ("%.*s", (int)n, str);   \
 518         } while (0)
 519
 520 #define CTL_CH(c)               ((c) - 'a' + 1)
 521 #define CTL_BACKSPACE           ('\b')
 522 #define DEL                     ((char)255)
 523 #define DEL7                    ((char)127)
 524 #define CREAD_HIST_CHAR         ('!')
 525
 526 #define getcmd_putch(ch)        putc(ch)
 527 #define getcmd_getch()          getc()
 528 #define getcmd_cbeep()          getcmd_putch('\a')
 529
 530 #define HIST_MAX                20
 531 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 532
 533 static int hist_max = 0;
 534 static int hist_add_idx = 0;
 535 static int hist_cur = -1;
 536 unsigned hist_num = 0;
 537
 538 char* hist_list[HIST_MAX];
 539 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 540
 541 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 542
 543 static void hist_init(void)
 544 {
 545         int i;
 546
 547         hist_max = 0;
 548         hist_add_idx = 0;
 549         hist_cur = -1;
 550         hist_num = 0;
 551
 552         for (i = 0; i < HIST_MAX; i++) {
 553                 hist_list[i] = hist_lines[i];
 554                 hist_list[i][0] = '\0';
 555         }
 556 }
 557
 558 static void cread_add_to_hist(char *line)
 559 {
 560         strcpy(hist_list[hist_add_idx], line);
 561
 562         if (++hist_add_idx >= HIST_MAX)
 563                 hist_add_idx = 0;
 564
 565         if (hist_add_idx > hist_max)
 566                 hist_max = hist_add_idx;
 567
 568         hist_num++;
 569 }
 570
 571 static char* hist_prev(void)
 572 {
 573         char *ret;
 574         int old_cur;
 575
 576         if (hist_cur < 0)
 577                 return NULL;
 578
 579         old_cur = hist_cur;
 580         if (--hist_cur < 0)
 581                 hist_cur = hist_max;
 582
 583         if (hist_cur == hist_add_idx) {
 584                 hist_cur = old_cur;
 585                 ret = NULL;
 586         } else
 587                 ret = hist_list[hist_cur];
 588
 589         return (ret);
 590 }
 591
 592 static char* hist_next(void)
 593 {
 594         char *ret;
 595
 596         if (hist_cur < 0)
 597                 return NULL;
 598
 599         if (hist_cur == hist_add_idx)
 600                 return NULL;
 601
 602         if (++hist_cur > hist_max)
 603                 hist_cur = 0;
 604
 605         if (hist_cur == hist_add_idx) {
 606                 ret = "";
 607         } else
 608                 ret = hist_list[hist_cur];
 609
 610         return (ret);
 611 }
 612
 613 #ifndef CONFIG_CMDLINE_EDITING
 614 static void cread_print_hist_list(void)
 615 {
 616         int i;
 617         unsigned long n;
 618
 619         n = hist_num - hist_max;
 620
 621         i = hist_add_idx + 1;
 622         while (1) {
 623                 if (i > hist_max)
 624                         i = 0;
 625                 if (i == hist_add_idx)
 626                         break;
 627                 printf("%s\n", hist_list[i]);
 628                 n++;
 629                 i++;
 630         }
 631 }
 632 #endif /* CONFIG_CMDLINE_EDITING */
 633
 634 #define BEGINNING_OF_LINE() {                   \
 635         while (num) {                           \
 636                 getcmd_putch(CTL_BACKSPACE);    \
 637                 num--;                          \
 638         }                                       \
 639 }
 640
 641 #define ERASE_TO_EOL() {                                \
 642         if (num < eol_num) {                            \
 643                 printf("%*s", (int)(eol_num - num), ""); \
 644                 do {                                    \
 645                         getcmd_putch(CTL_BACKSPACE);    \
 646                 } while (--eol_num > num);              \
 647         }                                               \
 648 }
 649
 650 #define REFRESH_TO_EOL() {                      \
 651         if (num < eol_num) {                    \
 652                 wlen = eol_num - num;           \
 653                 putnstr(buf + num, wlen);       \
 654                 num = eol_num;                  \
 655         }                                       \
 656 }
 657
 658 static void cread_add_char(char ichar, int insert, unsigned long *num,
 659                unsigned long *eol_num, char *buf, unsigned long len)
 660 {
 661         unsigned long wlen;
 662
 663         /* room ??? */
 664         if (insert || *num == *eol_num) {
 665                 if (*eol_num > len - 1) {
 666                         getcmd_cbeep();
 667                         return;
 668                 }
 669                 (*eol_num)++;
 670         }
 671
 672         if (insert) {
 673                 wlen = *eol_num - *num;
 674                 if (wlen > 1) {
 675                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 676                 }
 677
 678                 buf[*num] = ichar;
 679                 putnstr(buf + *num, wlen);
 680                 (*num)++;
 681                 while (--wlen) {
 682                         getcmd_putch(CTL_BACKSPACE);
 683                 }
 684         } else {
 685                 /* echo the character */
 686                 wlen = 1;
 687                 buf[*num] = ichar;
 688                 putnstr(buf + *num, wlen);
 689                 (*num)++;
 690         }
 691 }
 692
 693 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 694               unsigned long *eol_num, char *buf, unsigned long len)
 695 {
 696         while (strsize--) {
 697                 cread_add_char(*str, insert, num, eol_num, buf, len);
 698                 str++;
 699         }
 700 }
 701
 702 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 703 {
 704         unsigned long num = 0;
 705         unsigned long eol_num = 0;
 706         unsigned long wlen;
 707         char ichar;
 708         int insert = 1;
 709         int esc_len = 0;
 710         char esc_save[8];
 711         int init_len = strlen(buf);
 712
 713         if (init_len)
 714                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 715
 716         while (1) {
 717 #ifdef CONFIG_BOOT_RETRY_TIME
 718                 while (!tstc()) {       /* while no incoming data */
 719                         if (retry_time >= 0 && get_ticks() > endtime)
 720                                 return (-2);    /* timed out */
 721                         WATCHDOG_RESET();
 722                 }
 723 #endif
 724
 725                 ichar = getcmd_getch();
 726
 727                 if ((ichar == '\n') || (ichar == '\r')) {
 728                         putc('\n');
 729                         break;
 730                 }
 731
 732                 /*
 733                  * handle standard linux xterm esc sequences for arrow key, etc.
 734                  */
 735                 if (esc_len != 0) {
 736                         if (esc_len == 1) {
 737                                 if (ichar == '[') {
 738                                         esc_save[esc_len] = ichar;
 739                                         esc_len = 2;
 740                                 } else {
 741                                         cread_add_str(esc_save, esc_len, insert,
 742                                                       &num, &eol_num, buf, *len);
 743                                         esc_len = 0;
 744                                 }
 745                                 continue;
 746                         }
 747
 748                         switch (ichar) {
 749
 750                         case 'D':       /* <- key */
 751                                 ichar = CTL_CH('b');
 752                                 esc_len = 0;
 753                                 break;
 754                         case 'C':       /* -> key */
 755                                 ichar = CTL_CH('f');
 756                                 esc_len = 0;
 757                                 break;  /* pass off to ^F handler */
 758                         case 'H':       /* Home key */
 759                                 ichar = CTL_CH('a');
 760                                 esc_len = 0;
 761                                 break;  /* pass off to ^A handler */
 762                         case 'A':       /* up arrow */
 763                                 ichar = CTL_CH('p');
 764                                 esc_len = 0;
 765                                 break;  /* pass off to ^P handler */
 766                         case 'B':       /* down arrow */
 767                                 ichar = CTL_CH('n');
 768                                 esc_len = 0;
 769                                 break;  /* pass off to ^N handler */
 770                         default:
 771                                 esc_save[esc_len++] = ichar;
 772                                 cread_add_str(esc_save, esc_len, insert,
 773                                               &num, &eol_num, buf, *len);
 774                                 esc_len = 0;
 775                                 continue;
 776                         }
 777                 }
 778
 779                 switch (ichar) {
 780                 case 0x1b:
 781                         if (esc_len == 0) {
 782                                 esc_save[esc_len] = ichar;
 783                                 esc_len = 1;
 784                         } else {
 785                                 puts("impossible condition #876\n");
 786                                 esc_len = 0;
 787                         }
 788                         break;
 789
 790                 case CTL_CH('a'):
 791                         BEGINNING_OF_LINE();
 792                         break;
 793                 case CTL_CH('c'):       /* ^C - break */
 794                         *buf = '\0';    /* discard input */
 795                         return (-1);
 796                 case CTL_CH('f'):
 797                         if (num < eol_num) {
 798                                 getcmd_putch(buf[num]);
 799                                 num++;
 800                         }
 801                         break;
 802                 case CTL_CH('b'):
 803                         if (num) {
 804                                 getcmd_putch(CTL_BACKSPACE);
 805                                 num--;
 806                         }
 807                         break;
 808                 case CTL_CH('d'):
 809                         if (num < eol_num) {
 810                                 wlen = eol_num - num - 1;
 811                                 if (wlen) {
 812                                         memmove(&buf[num], &buf[num+1], wlen);
 813                                         putnstr(buf + num, wlen);
 814                                 }
 815
 816                                 getcmd_putch(' ');
 817                                 do {
 818                                         getcmd_putch(CTL_BACKSPACE);
 819                                 } while (wlen--);
 820                                 eol_num--;
 821                         }
 822                         break;
 823                 case CTL_CH('k'):
 824                         ERASE_TO_EOL();
 825                         break;
 826                 case CTL_CH('e'):
 827                         REFRESH_TO_EOL();
 828                         break;
 829                 case CTL_CH('o'):
 830                         insert = !insert;
 831                         break;
 832                 case CTL_CH('x'):
 833                 case CTL_CH('u'):
 834                         BEGINNING_OF_LINE();
 835                         ERASE_TO_EOL();
 836                         break;
 837                 case DEL:
 838                 case DEL7:
 839                 case 8:
 840                         if (num) {
 841                                 wlen = eol_num - num;
 842                                 num--;
 843                                 memmove(&buf[num], &buf[num+1], wlen);
 844                                 getcmd_putch(CTL_BACKSPACE);
 845                                 putnstr(buf + num, wlen);
 846                                 getcmd_putch(' ');
 847                                 do {
 848                                         getcmd_putch(CTL_BACKSPACE);
 849                                 } while (wlen--);
 850                                 eol_num--;
 851                         }
 852                         break;
 853                 case CTL_CH('p'):
 854                 case CTL_CH('n'):
 855                 {
 856                         char * hline;
 857
 858                         esc_len = 0;
 859
 860                         if (ichar == CTL_CH('p'))
 861                                 hline = hist_prev();
 862                         else
 863                                 hline = hist_next();
 864
 865                         if (!hline) {
 866                                 getcmd_cbeep();
 867                                 continue;
 868                         }
 869
 870                         /* nuke the current line */
 871                         /* first, go home */
 872                         BEGINNING_OF_LINE();
 873
 874                         /* erase to end of line */
 875                         ERASE_TO_EOL();
 876
 877                         /* copy new line into place and display */
 878                         strcpy(buf, hline);
 879                         eol_num = strlen(buf);
 880                         REFRESH_TO_EOL();
 881                         continue;
 882                 }
 883 #ifdef CONFIG_AUTO_COMPLETE
 884                 case '\t': {
 885                         int num2, col;
 886
 887                         /* do not autocomplete when in the middle */
 888                         if (num < eol_num) {
 889                                 getcmd_cbeep();
 890                                 break;
 891                         }
 892
 893                         buf[num] = '\0';
 894                         col = strlen(prompt) + eol_num;
 895                         num2 = num;
 896                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 897                                 col = num2 - num;
 898                                 num += col;
 899                                 eol_num += col;
 900                         }
 901                         break;
 902                 }
 903 #endif
 904                 default:
 905                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 906                         break;
 907                 }
 908         }
 909         *len = eol_num;
 910         buf[eol_num] = '\0';    /* lose the newline */
 911
 912         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 913                 cread_add_to_hist(buf);
 914         hist_cur = hist_add_idx;
 915
 916         return 0;
 917 }
 918
 919 #endif /* CONFIG_CMDLINE_EDITING */
 920
 921 /****************************************************************************/
 922
 923 /*
 924  * Prompt for input and read a line.
 925  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 926  * time out when time goes past endtime (timebase time in ticks).
 927  * Return:      number of read characters
 928  *              -1 if break
 929  *              -2 if timed out
 930  */
 931 int readline (const char *const prompt)
 932 {
 933         /*
 934          * If console_buffer isn't 0-length the user will be prompted to modify
 935          * it instead of entering it from scratch as desired.
 936          */
 937         console_buffer[0] = '\0';
 938
 939         return readline_into_buffer(prompt, console_buffer);
 940 }
 941
 942
 943 int readline_into_buffer (const char *const prompt, char * buffer)
 944 {
 945         char *p = buffer;
 946 #ifdef CONFIG_CMDLINE_EDITING
 947         unsigned int len = CONFIG_SYS_CBSIZE;
 948         int rc;
 949         static int initted = 0;
 950
 951         /*
 952          * History uses a global array which is not
 953          * writable until after relocation to RAM.
 954          * Revert to non-history version if still
 955          * running from flash.
 956          */
 957         if (gd->flags & GD_FLG_RELOC) {
 958                 if (!initted) {
 959                         hist_init();
 960                         initted = 1;
 961                 }
 962
 963                 if (prompt)
 964                         puts (prompt);
 965
 966                 rc = cread_line(prompt, p, &len);
 967                 return rc < 0 ? rc : len;
 968
 969         } else {
 970 #endif  /* CONFIG_CMDLINE_EDITING */
 971         char * p_buf = p;
 972         int     n = 0;                          /* buffer index         */
 973         int     plen = 0;                       /* prompt length        */
 974         int     col;                            /* output column cnt    */
 975         char    c;
 976
 977         /* print prompt */
 978         if (prompt) {
 979                 plen = strlen (prompt);
 980                 puts (prompt);
 981         }
 982         col = plen;
 983
 984         for (;;) {
 985 #ifdef CONFIG_BOOT_RETRY_TIME
 986                 while (!tstc()) {       /* while no incoming data */
 987                         if (retry_time >= 0 && get_ticks() > endtime)
 988                                 return (-2);    /* timed out */
 989                         WATCHDOG_RESET();
 990                 }
 991 #endif
 992                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 993
 994 #ifdef CONFIG_SHOW_ACTIVITY
 995                 while (!tstc()) {
 996                         extern void show_activity(int arg);
 997                         show_activity(0);
 998                         WATCHDOG_RESET();
 999                 }
1000 #endif
1001                 c = getc();
1002
1003                 /*
1004                  * Special character handling
1005                  */
1006                 switch (c) {
1007                 case '\r':                              /* Enter                */
1008                 case '\n':
1009                         *p = '\0';
1010                         puts ("\r\n");
1011                         return (p - p_buf);
1012
1013                 case '\0':                              /* nul                  */
1014                         continue;
1015
1016                 case 0x03:                              /* ^C - break           */
1017                         p_buf[0] = '\0';        /* discard input */
1018                         return (-1);
1019
1020                 case 0x15:                              /* ^U - erase line      */
1021                         while (col > plen) {
1022                                 puts (erase_seq);
1023                                 --col;
1024                         }
1025                         p = p_buf;
1026                         n = 0;
1027                         continue;
1028
1029                 case 0x17:                              /* ^W - erase word      */
1030                         p=delete_char(p_buf, p, &col, &n, plen);
1031                         while ((n > 0) && (*p != ' ')) {
1032                                 p=delete_char(p_buf, p, &col, &n, plen);
1033                         }
1034                         continue;
1035
1036                 case 0x08:                              /* ^H  - backspace      */
1037                 case 0x7F:                              /* DEL - backspace      */
1038                         p=delete_char(p_buf, p, &col, &n, plen);
1039                         continue;
1040
1041                 default:
1042                         /*
1043                          * Must be a normal character then
1044                          */
1045                         if (n < CONFIG_SYS_CBSIZE-2) {
1046                                 if (c == '\t') {        /* expand TABs          */
1047 #ifdef CONFIG_AUTO_COMPLETE
1048                                         /* if auto completion triggered just continue */
1049                                         *p = '\0';
1050                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1051                                                 p = p_buf + n;  /* reset */
1052                                                 continue;
1053                                         }
1054 #endif
1055                                         puts (tab_seq+(col&07));
1056                                         col += 8 - (col&07);
1057                                 } else {
1058                                         ++col;          /* echo input           */
1059                                         putc (c);
1060                                 }
1061                                 *p++ = c;
1062                                 ++n;
1063                         } else {                        /* Buffer full          */
1064                                 putc ('\a');
1065                         }
1066                 }
1067         }
1068 #ifdef CONFIG_CMDLINE_EDITING
1069         }
1070 #endif
1071 }
1072
1073 /****************************************************************************/
1074
1075 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1076 {
1077         char *s;
1078
1079         if (*np == 0) {
1080                 return (p);
1081         }
1082
1083         if (*(--p) == '\t') {                   /* will retype the whole line   */
1084                 while (*colp > plen) {
1085                         puts (erase_seq);
1086                         (*colp)--;
1087                 }
1088                 for (s=buffer; s<p; ++s) {
1089                         if (*s == '\t') {
1090                                 puts (tab_seq+((*colp) & 07));
1091                                 *colp += 8 - ((*colp) & 07);
1092                         } else {
1093                                 ++(*colp);
1094                                 putc (*s);
1095                         }
1096                 }
1097         } else {
1098                 puts (erase_seq);
1099                 (*colp)--;
1100         }
1101         (*np)--;
1102         return (p);
1103 }
1104
1105 /****************************************************************************/
1106
1107 int parse_line (char *line, char *argv[])
1108 {
1109         int nargs = 0;
1110
1111 #ifdef DEBUG_PARSER
1112         printf ("parse_line: \"%s\"\n", line);
1113 #endif
1114         while (nargs < CONFIG_SYS_MAXARGS) {
1115
1116                 /* skip any white space */
1117                 while ((*line == ' ') || (*line == '\t')) {
1118                         ++line;
1119                 }
1120
1121                 if (*line == '\0') {    /* end of line, no more args    */
1122                         argv[nargs] = NULL;
1123 #ifdef DEBUG_PARSER
1124                 printf ("parse_line: nargs=%d\n", nargs);
1125 #endif
1126                         return (nargs);
1127                 }
1128
1129                 argv[nargs++] = line;   /* begin of argument string     */
1130
1131                 /* find end of string */
1132                 while (*line && (*line != ' ') && (*line != '\t')) {
1133                         ++line;
1134                 }
1135
1136                 if (*line == '\0') {    /* end of line, no more args    */
1137                         argv[nargs] = NULL;
1138 #ifdef DEBUG_PARSER
1139                 printf ("parse_line: nargs=%d\n", nargs);
1140 #endif
1141                         return (nargs);
1142                 }
1143
1144                 *line++ = '\0';         /* terminate current arg         */
1145         }
1146
1147         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1148
1149 #ifdef DEBUG_PARSER
1150         printf ("parse_line: nargs=%d\n", nargs);
1151 #endif
1152         return (nargs);
1153 }
1154
1155 /****************************************************************************/
1156
1157 static void process_macros (const char *input, char *output)
1158 {
1159         char c, prev;
1160         const char *varname_start = NULL;
1161         int inputcnt = strlen (input);
1162         int outputcnt = CONFIG_SYS_CBSIZE;
1163         int state = 0;          /* 0 = waiting for '$'  */
1164
1165         /* 1 = waiting for '(' or '{' */
1166         /* 2 = waiting for ')' or '}' */
1167         /* 3 = waiting for '''  */
1168 #ifdef DEBUG_PARSER
1169         char *output_start = output;
1170
1171         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1172                 input);
1173 #endif
1174
1175         prev = '\0';            /* previous character   */
1176
1177         while (inputcnt && outputcnt) {
1178                 c = *input++;
1179                 inputcnt--;
1180
1181                 if (state != 3) {
1182                         /* remove one level of escape characters */
1183                         if ((c == '\\') && (prev != '\\')) {
1184                                 if (inputcnt-- == 0)
1185                                         break;
1186                                 prev = c;
1187                                 c = *input++;
1188                         }
1189                 }
1190
1191                 switch (state) {
1192                 case 0: /* Waiting for (unescaped) $    */
1193                         if ((c == '\'') && (prev != '\\')) {
1194                                 state = 3;
1195                                 break;
1196                         }
1197                         if ((c == '$') && (prev != '\\')) {
1198                                 state++;
1199                         } else {
1200                                 *(output++) = c;
1201                                 outputcnt--;
1202                         }
1203                         break;
1204                 case 1: /* Waiting for (        */
1205                         if (c == '(' || c == '{') {
1206                                 state++;
1207                                 varname_start = input;
1208                         } else {
1209                                 state = 0;
1210                                 *(output++) = '$';
1211                                 outputcnt--;
1212
1213                                 if (outputcnt) {
1214                                         *(output++) = c;
1215                                         outputcnt--;
1216                                 }
1217                         }
1218                         break;
1219                 case 2: /* Waiting for )        */
1220                         if (c == ')' || c == '}') {
1221                                 int i;
1222                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1223                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1224
1225                                 /* Get the varname */
1226                                 for (i = 0; i < envcnt; i++) {
1227                                         envname[i] = varname_start[i];
1228                                 }
1229                                 envname[i] = 0;
1230
1231                                 /* Get its value */
1232                                 envval = getenv (envname);
1233
1234                                 /* Copy into the line if it exists */
1235                                 if (envval != NULL)
1236                                         while ((*envval) && outputcnt) {
1237                                                 *(output++) = *(envval++);
1238                                                 outputcnt--;
1239                                         }
1240                                 /* Look for another '$' */
1241                                 state = 0;
1242                         }
1243                         break;
1244                 case 3: /* Waiting for '        */
1245                         if ((c == '\'') && (prev != '\\')) {
1246                                 state = 0;
1247                         } else {
1248                                 *(output++) = c;
1249                                 outputcnt--;
1250                         }
1251                         break;
1252                 }
1253                 prev = c;
1254         }
1255
1256         if (outputcnt)
1257                 *output = 0;
1258         else
1259                 *(output - 1) = 0;
1260
1261 #ifdef DEBUG_PARSER
1262         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1263                 strlen (output_start), output_start);
1264 #endif
1265 }
1266
1267 /****************************************************************************
1268  * returns:
1269  *      1  - command executed, repeatable
1270  *      0  - command executed but not repeatable, interrupted commands are
1271  *           always considered not repeatable
1272  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1273  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1274  *           considered unrecognized)
1275  *
1276  * WARNING:
1277  *
1278  * We must create a temporary copy of the command since the command we get
1279  * may be the result from getenv(), which returns a pointer directly to
1280  * the environment data, which may change magicly when the command we run
1281  * creates or modifies environment variables (like "bootp" does).
1282  */
1283
1284 int run_command (const char *cmd, int flag)
1285 {
1286         cmd_tbl_t *cmdtp;
1287         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1288         char *token;                    /* start of token in cmdbuf     */
1289         char *sep;                      /* end of token (separator) in cmdbuf */
1290         char finaltoken[CONFIG_SYS_CBSIZE];
1291         char *str = cmdbuf;
1292         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1293         int argc, inquotes;
1294         int repeatable = 1;
1295         int rc = 0;
1296
1297 #ifdef DEBUG_PARSER
1298         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1299         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1300         puts ("\"\n");
1301 #endif
1302
1303         clear_ctrlc();          /* forget any previous Control C */
1304
1305         if (!cmd || !*cmd) {
1306                 return -1;      /* empty command */
1307         }
1308
1309         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1310                 puts ("## Command too long!\n");
1311                 return -1;
1312         }
1313
1314         strcpy (cmdbuf, cmd);
1315
1316         /* Process separators and check for invalid
1317          * repeatable commands
1318          */
1319
1320 #ifdef DEBUG_PARSER
1321         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1322 #endif
1323         while (*str) {
1324
1325                 /*
1326                  * Find separator, or string end
1327                  * Allow simple escape of ';' by writing "\;"
1328                  */
1329                 for (inquotes = 0, sep = str; *sep; sep++) {
1330                         if ((*sep=='\'') &&
1331                             (*(sep-1) != '\\'))
1332                                 inquotes=!inquotes;
1333
1334                         if (!inquotes &&
1335                             (*sep == ';') &&    /* separator            */
1336                             ( sep != str) &&    /* past string start    */
1337                             (*(sep-1) != '\\')) /* and NOT escaped      */
1338                                 break;
1339                 }
1340
1341                 /*
1342                  * Limit the token to data between separators
1343                  */
1344                 token = str;
1345                 if (*sep) {
1346                         str = sep + 1;  /* start of command for next pass */
1347                         *sep = '\0';
1348                 }
1349                 else
1350                         str = sep;      /* no more commands for next pass */
1351 #ifdef DEBUG_PARSER
1352                 printf ("token: \"%s\"\n", token);
1353 #endif
1354
1355                 /* find macros in this token and replace them */
1356                 process_macros (token, finaltoken);
1357
1358                 /* Extract arguments */
1359                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1360                         rc = -1;        /* no command at all */
1361                         continue;
1362                 }
1363
1364                 /* Look up command in command table */
1365                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1366                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1367                         rc = -1;        /* give up after bad command */
1368                         continue;
1369                 }
1370
1371                 /* found - check max args */
1372                 if (argc > cmdtp->maxargs) {
1373                         cmd_usage(cmdtp);
1374                         rc = -1;
1375                         continue;
1376                 }
1377
1378 #if defined(CONFIG_CMD_BOOTD)
1379                 /* avoid "bootd" recursion */
1380                 if (cmdtp->cmd == do_bootd) {
1381 #ifdef DEBUG_PARSER
1382                         printf ("[%s]\n", finaltoken);
1383 #endif
1384                         if (flag & CMD_FLAG_BOOTD) {
1385                                 puts ("'bootd' recursion detected\n");
1386                                 rc = -1;
1387                                 continue;
1388                         } else {
1389                                 flag |= CMD_FLAG_BOOTD;
1390                         }
1391                 }
1392 #endif
1393
1394                 /* OK - call function to do the command */
1395                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1396                         rc = -1;
1397                 }
1398
1399                 repeatable &= cmdtp->repeatable;
1400
1401                 /* Did the user stop this? */
1402                 if (had_ctrlc ())
1403                         return -1;      /* if stopped then not repeatable */
1404         }
1405
1406         return rc ? rc : repeatable;
1407 }
1408
1409 /****************************************************************************/
1410
1411 #if defined(CONFIG_CMD_RUN)
1412 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1413 {
1414         int i;
1415
1416         if (argc < 2)
1417                 return cmd_usage(cmdtp);
1418
1419         for (i=1; i<argc; ++i) {
1420                 char *arg;
1421
1422                 if ((arg = getenv (argv[i])) == NULL) {
1423                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1424                         return 1;
1425                 }
1426 #ifndef CONFIG_SYS_HUSH_PARSER
1427                 if (run_command (arg, flag) == -1)
1428                         return 1;
1429 #else
1430                 if (parse_string_outer(arg,
1431                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1432                         return 1;
1433 #endif
1434         }
1435         return 0;
1436 }
1437 #endif