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 CFG_HUSH_PARSER
  38 #include <hush.h>
  39 #endif
  40
  41 #include <post.h>
  42
  43 #ifdef CONFIG_SILENT_CONSOLE
  44 DECLARE_GLOBAL_DATA_PTR;
  45 #endif
  46
  47 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
  48 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);               /* for do_reset() prototype */
  49 #endif
  50
  51 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  52
  53
  54 #define MAX_DELAY_STOP_STR 32
  55
  56 static int parse_line (char *, char *[]);
  57 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  58 static int abortboot(int);
  59 #endif
  60
  61 #undef DEBUG_PARSER
  62
  63 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
  64
  65 #ifndef CONFIG_CMDLINE_EDITING
  66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  67 static char erase_seq[] = "\b \b";              /* erase sequence       */
  68 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  69 #endif /* CONFIG_CMDLINE_EDITING */
  70
  71 #ifdef CONFIG_BOOT_RETRY_TIME
  72 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  73 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  74 #endif
  75
  76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  77
  78 #ifndef CONFIG_BOOT_RETRY_MIN
  79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  80 #endif
  81
  82 #ifdef CONFIG_MODEM_SUPPORT
  83 int do_mdm_init = 0;
  84 extern void mdm_init(void); /* defined in board.c */
  85 #endif
  86
  87 /***************************************************************************
  88  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  89  * returns: 0 -  no key string, allow autoboot
  90  *          1 - got key string, abort
  91  */
  92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  93 # if defined(CONFIG_AUTOBOOT_KEYED)
  94 static __inline__ int abortboot(int bootdelay)
  95 {
  96         int abort = 0;
  97         uint64_t etime = endtick(bootdelay);
  98         struct {
  99                 char* str;
 100                 u_int len;
 101                 int retry;
 102         }
 103         delaykey [] = {
 104                 { str: getenv ("bootdelaykey"),  retry: 1 },
 105                 { str: getenv ("bootdelaykey2"), retry: 1 },
 106                 { str: getenv ("bootstopkey"),   retry: 0 },
 107                 { str: getenv ("bootstopkey2"),  retry: 0 },
 108         };
 109
 110         char presskey [MAX_DELAY_STOP_STR];
 111         u_int presskey_len = 0;
 112         u_int presskey_max = 0;
 113         u_int i;
 114
 115 #ifdef CONFIG_SILENT_CONSOLE
 116         if (gd->flags & GD_FLG_SILENT) {
 117                 /* Restore serial console */
 118                 console_assign (stdout, "serial");
 119                 console_assign (stderr, "serial");
 120         }
 121 #endif
 122
 123 #  ifdef CONFIG_AUTOBOOT_PROMPT
 124         printf (CONFIG_AUTOBOOT_PROMPT, bootdelay);
 125 #  endif
 126
 127 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 128         if (delaykey[0].str == NULL)
 129                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 130 #  endif
 131 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 132         if (delaykey[1].str == NULL)
 133                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 134 #  endif
 135 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 136         if (delaykey[2].str == NULL)
 137                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 138 #  endif
 139 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 140         if (delaykey[3].str == NULL)
 141                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 142 #  endif
 143
 144         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 145                 delaykey[i].len = delaykey[i].str == NULL ?
 146                                     0 : strlen (delaykey[i].str);
 147                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 148                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 149
 150                 presskey_max = presskey_max > delaykey[i].len ?
 151                                     presskey_max : delaykey[i].len;
 152
 153 #  if DEBUG_BOOTKEYS
 154                 printf("%s key:<%s>\n",
 155                        delaykey[i].retry ? "delay" : "stop",
 156                        delaykey[i].str ? delaykey[i].str : "NULL");
 157 #  endif
 158         }
 159
 160         /* In order to keep up with incoming data, check timeout only
 161          * when catch up.
 162          */
 163         while (!abort && get_ticks() <= etime) {
 164                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 165                         if (delaykey[i].len > 0 &&
 166                             presskey_len >= delaykey[i].len &&
 167                             memcmp (presskey + presskey_len - delaykey[i].len,
 168                                     delaykey[i].str,
 169                                     delaykey[i].len) == 0) {
 170 #  if DEBUG_BOOTKEYS
 171                                 printf("got %skey\n",
 172                                        delaykey[i].retry ? "delay" : "stop");
 173 #  endif
 174
 175 #  ifdef CONFIG_BOOT_RETRY_TIME
 176                                 /* don't retry auto boot */
 177                                 if (! delaykey[i].retry)
 178                                         retry_time = -1;
 179 #  endif
 180                                 abort = 1;
 181                         }
 182                 }
 183
 184                 if (tstc()) {
 185                         if (presskey_len < presskey_max) {
 186                                 presskey [presskey_len ++] = getc();
 187                         }
 188                         else {
 189                                 for (i = 0; i < presskey_max - 1; i ++)
 190                                         presskey [i] = presskey [i + 1];
 191
 192                                 presskey [i] = getc();
 193                         }
 194                 }
 195         }
 196 #  if DEBUG_BOOTKEYS
 197         if (!abort)
 198                 puts ("key timeout\n");
 199 #  endif
 200
 201 #ifdef CONFIG_SILENT_CONSOLE
 202         if (abort) {
 203                 /* permanently enable normal console output */
 204                 gd->flags &= ~(GD_FLG_SILENT);
 205         } else if (gd->flags & GD_FLG_SILENT) {
 206                 /* Restore silent console */
 207                 console_assign (stdout, "nulldev");
 208                 console_assign (stderr, "nulldev");
 209         }
 210 #endif
 211
 212         return abort;
 213 }
 214
 215 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 216
 217 #ifdef CONFIG_MENUKEY
 218 static int menukey = 0;
 219 #endif
 220
 221 static __inline__ int abortboot(int bootdelay)
 222 {
 223         int abort = 0;
 224
 225 #ifdef CONFIG_SILENT_CONSOLE
 226         if (gd->flags & GD_FLG_SILENT) {
 227                 /* Restore serial console */
 228                 console_assign (stdout, "serial");
 229                 console_assign (stderr, "serial");
 230         }
 231 #endif
 232
 233 #ifdef CONFIG_MENUPROMPT
 234         printf(CONFIG_MENUPROMPT, bootdelay);
 235 #else
 236         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 237 #endif
 238
 239 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 240         /*
 241          * Check if key already pressed
 242          * Don't check if bootdelay < 0
 243          */
 244         if (bootdelay >= 0) {
 245                 if (tstc()) {   /* we got a key press   */
 246                         (void) getc();  /* consume input        */
 247                         puts ("\b\b\b 0");
 248                         abort = 1;      /* don't auto boot      */
 249                 }
 250         }
 251 #endif
 252
 253         while ((bootdelay > 0) && (!abort)) {
 254                 int i;
 255
 256                 --bootdelay;
 257                 /* delay 100 * 10ms */
 258                 for (i=0; !abort && i<100; ++i) {
 259                         if (tstc()) {   /* we got a key press   */
 260                                 abort  = 1;     /* don't auto boot      */
 261                                 bootdelay = 0;  /* no more delay        */
 262 # ifdef CONFIG_MENUKEY
 263                                 menukey = getc();
 264 # else
 265                                 (void) getc();  /* consume input        */
 266 # endif
 267                                 break;
 268                         }
 269                         udelay (10000);
 270                 }
 271
 272                 printf ("\b\b\b%2d ", bootdelay);
 273         }
 274
 275         putc ('\n');
 276
 277 #ifdef CONFIG_SILENT_CONSOLE
 278         if (abort) {
 279                 /* permanently enable normal console output */
 280                 gd->flags &= ~(GD_FLG_SILENT);
 281         } else if (gd->flags & GD_FLG_SILENT) {
 282                 /* Restore silent console */
 283                 console_assign (stdout, "nulldev");
 284                 console_assign (stderr, "nulldev");
 285         }
 286 #endif
 287
 288         return abort;
 289 }
 290 # endif /* CONFIG_AUTOBOOT_KEYED */
 291 #endif  /* CONFIG_BOOTDELAY >= 0  */
 292
 293 /****************************************************************************/
 294
 295 void main_loop (void)
 296 {
 297 #ifndef CFG_HUSH_PARSER
 298         static char lastcommand[CFG_CBSIZE] = { 0, };
 299         int len;
 300         int rc = 1;
 301         int flag;
 302 #endif
 303
 304 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 305         char *s;
 306         int bootdelay;
 307 #endif
 308 #ifdef CONFIG_PREBOOT
 309         char *p;
 310 #endif
 311 #ifdef CONFIG_BOOTCOUNT_LIMIT
 312         unsigned long bootcount = 0;
 313         unsigned long bootlimit = 0;
 314         char *bcs;
 315         char bcs_set[16];
 316 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 317
 318 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 319         ulong bmp = 0;          /* default bitmap */
 320         extern int trab_vfd (ulong bitmap);
 321
 322 #ifdef CONFIG_MODEM_SUPPORT
 323         if (do_mdm_init)
 324                 bmp = 1;        /* alternate bitmap */
 325 #endif
 326         trab_vfd (bmp);
 327 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 328
 329 #ifdef CONFIG_BOOTCOUNT_LIMIT
 330         bootcount = bootcount_load();
 331         bootcount++;
 332         bootcount_store (bootcount);
 333         sprintf (bcs_set, "%lu", bootcount);
 334         setenv ("bootcount", bcs_set);
 335         bcs = getenv ("bootlimit");
 336         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 337 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 338
 339 #ifdef CONFIG_MODEM_SUPPORT
 340         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 341         if (do_mdm_init) {
 342                 char *str = strdup(getenv("mdm_cmd"));
 343                 setenv ("preboot", str);  /* set or delete definition */
 344                 if (str != NULL)
 345                         free (str);
 346                 mdm_init(); /* wait for modem connection */
 347         }
 348 #endif  /* CONFIG_MODEM_SUPPORT */
 349
 350 #ifdef CONFIG_VERSION_VARIABLE
 351         {
 352                 extern char version_string[];
 353
 354                 setenv ("ver", version_string);  /* set version variable */
 355         }
 356 #endif /* CONFIG_VERSION_VARIABLE */
 357
 358 #ifdef CFG_HUSH_PARSER
 359         u_boot_hush_start ();
 360 #endif
 361
 362 #ifdef CONFIG_AUTO_COMPLETE
 363         install_auto_complete();
 364 #endif
 365
 366 #ifdef CONFIG_PREBOOT
 367         if ((p = getenv ("preboot")) != NULL) {
 368 # ifdef CONFIG_AUTOBOOT_KEYED
 369                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 370 # endif
 371
 372 # ifndef CFG_HUSH_PARSER
 373                 run_command (p, 0);
 374 # else
 375                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 376                                     FLAG_EXIT_FROM_LOOP);
 377 # endif
 378
 379 # ifdef CONFIG_AUTOBOOT_KEYED
 380                 disable_ctrlc(prev);    /* restore Control C checking */
 381 # endif
 382         }
 383 #endif /* CONFIG_PREBOOT */
 384
 385 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 386         s = getenv ("bootdelay");
 387         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 388
 389         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 390
 391 # ifdef CONFIG_BOOT_RETRY_TIME
 392         init_cmd_timeout ();
 393 # endif /* CONFIG_BOOT_RETRY_TIME */
 394
 395 #ifdef CONFIG_BOOTCOUNT_LIMIT
 396         if (bootlimit && (bootcount > bootlimit)) {
 397                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 398                         (unsigned)bootlimit);
 399                 s = getenv ("altbootcmd");
 400         }
 401         else
 402 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 403                 s = getenv ("bootcmd");
 404
 405         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 406
 407         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 408 # ifdef CONFIG_AUTOBOOT_KEYED
 409                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 410 # endif
 411
 412 # ifndef CFG_HUSH_PARSER
 413                 run_command (s, 0);
 414 # else
 415                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 416                                     FLAG_EXIT_FROM_LOOP);
 417 # endif
 418
 419 # ifdef CONFIG_AUTOBOOT_KEYED
 420                 disable_ctrlc(prev);    /* restore Control C checking */
 421 # endif
 422         }
 423
 424 # ifdef CONFIG_MENUKEY
 425         if (menukey == CONFIG_MENUKEY) {
 426             s = getenv("menucmd");
 427             if (s) {
 428 # ifndef CFG_HUSH_PARSER
 429                 run_command (s, 0);
 430 # else
 431                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 432                                     FLAG_EXIT_FROM_LOOP);
 433 # endif
 434             }
 435         }
 436 #endif /* CONFIG_MENUKEY */
 437 #endif  /* CONFIG_BOOTDELAY */
 438
 439 #ifdef CONFIG_AMIGAONEG3SE
 440         {
 441             extern void video_banner(void);
 442             video_banner();
 443         }
 444 #endif
 445
 446         /*
 447          * Main Loop for Monitor Command Processing
 448          */
 449 #ifdef CFG_HUSH_PARSER
 450         parse_file_outer();
 451         /* This point is never reached */
 452         for (;;);
 453 #else
 454         for (;;) {
 455 #ifdef CONFIG_BOOT_RETRY_TIME
 456                 if (rc >= 0) {
 457                         /* Saw enough of a valid command to
 458                          * restart the timeout.
 459                          */
 460                         reset_cmd_timeout();
 461                 }
 462 #endif
 463                 len = readline (CFG_PROMPT);
 464
 465                 flag = 0;       /* assume no special flags for now */
 466                 if (len > 0)
 467                         strcpy (lastcommand, console_buffer);
 468                 else if (len == 0)
 469                         flag |= CMD_FLAG_REPEAT;
 470 #ifdef CONFIG_BOOT_RETRY_TIME
 471                 else if (len == -2) {
 472                         /* -2 means timed out, retry autoboot
 473                          */
 474                         puts ("\nTimed out waiting for command\n");
 475 # ifdef CONFIG_RESET_TO_RETRY
 476                         /* Reinit board to run initialization code again */
 477                         do_reset (NULL, 0, 0, NULL);
 478 # else
 479                         return;         /* retry autoboot */
 480 # endif
 481                 }
 482 #endif
 483
 484                 if (len == -1)
 485                         puts ("<INTERRUPT>\n");
 486                 else
 487                         rc = run_command (lastcommand, flag);
 488
 489                 if (rc <= 0) {
 490                         /* invalid command or not repeatable, forget it */
 491                         lastcommand[0] = 0;
 492                 }
 493         }
 494 #endif /*CFG_HUSH_PARSER*/
 495 }
 496
 497 #ifdef CONFIG_BOOT_RETRY_TIME
 498 /***************************************************************************
 499  * initialize command line timeout
 500  */
 501 void init_cmd_timeout(void)
 502 {
 503         char *s = getenv ("bootretry");
 504
 505         if (s != NULL)
 506                 retry_time = (int)simple_strtol(s, NULL, 10);
 507         else
 508                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 509
 510         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 511                 retry_time = CONFIG_BOOT_RETRY_MIN;
 512 }
 513
 514 /***************************************************************************
 515  * reset command line timeout to retry_time seconds
 516  */
 517 void reset_cmd_timeout(void)
 518 {
 519         endtime = endtick(retry_time);
 520 }
 521 #endif
 522
 523 #ifdef CONFIG_CMDLINE_EDITING
 524
 525 /*
 526  * cmdline-editing related codes from vivi.
 527  * Author: Janghoon Lyu <nandy@mizi.com>
 528  */
 529
 530 #define putnstr(str,n)  do {                    \
 531                 printf ("%.*s", n, str);        \
 532         } while (0)
 533
 534 #define CTL_CH(c)               ((c) - 'a' + 1)
 535
 536 #define MAX_CMDBUF_SIZE         256
 537
 538 #define CTL_BACKSPACE           ('\b')
 539 #define DEL                     ((char)255)
 540 #define DEL7                    ((char)127)
 541 #define CREAD_HIST_CHAR         ('!')
 542
 543 #define getcmd_putch(ch)        putc(ch)
 544 #define getcmd_getch()          getc()
 545 #define getcmd_cbeep()          getcmd_putch('\a')
 546
 547 #define HIST_MAX                20
 548 #define HIST_SIZE               MAX_CMDBUF_SIZE
 549
 550 static int hist_max = 0;
 551 static int hist_add_idx = 0;
 552 static int hist_cur = -1;
 553 unsigned hist_num = 0;
 554
 555 char* hist_list[HIST_MAX];
 556 char hist_lines[HIST_MAX][HIST_SIZE];
 557
 558 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 559
 560 static void hist_init(void)
 561 {
 562         int i;
 563
 564         hist_max = 0;
 565         hist_add_idx = 0;
 566         hist_cur = -1;
 567         hist_num = 0;
 568
 569         for (i = 0; i < HIST_MAX; i++) {
 570                 hist_list[i] = hist_lines[i];
 571                 hist_list[i][0] = '\0';
 572         }
 573 }
 574
 575 static void cread_add_to_hist(char *line)
 576 {
 577         strcpy(hist_list[hist_add_idx], line);
 578
 579         if (++hist_add_idx >= HIST_MAX)
 580                 hist_add_idx = 0;
 581
 582         if (hist_add_idx > hist_max)
 583                 hist_max = hist_add_idx;
 584
 585         hist_num++;
 586 }
 587
 588 static char* hist_prev(void)
 589 {
 590         char *ret;
 591         int old_cur;
 592
 593         if (hist_cur < 0)
 594                 return NULL;
 595
 596         old_cur = hist_cur;
 597         if (--hist_cur < 0)
 598                 hist_cur = hist_max;
 599
 600         if (hist_cur == hist_add_idx) {
 601                 hist_cur = old_cur;
 602                 ret = NULL;
 603         } else
 604                 ret = hist_list[hist_cur];
 605
 606         return (ret);
 607 }
 608
 609 static char* hist_next(void)
 610 {
 611         char *ret;
 612
 613         if (hist_cur < 0)
 614                 return NULL;
 615
 616         if (hist_cur == hist_add_idx)
 617                 return NULL;
 618
 619         if (++hist_cur > hist_max)
 620                 hist_cur = 0;
 621
 622         if (hist_cur == hist_add_idx) {
 623                 ret = "";
 624         } else
 625                 ret = hist_list[hist_cur];
 626
 627         return (ret);
 628 }
 629
 630 #ifndef CONFIG_CMDLINE_EDITING
 631 static void cread_print_hist_list(void)
 632 {
 633         int i;
 634         unsigned long n;
 635
 636         n = hist_num - hist_max;
 637
 638         i = hist_add_idx + 1;
 639         while (1) {
 640                 if (i > hist_max)
 641                         i = 0;
 642                 if (i == hist_add_idx)
 643                         break;
 644                 printf("%s\n", hist_list[i]);
 645                 n++;
 646                 i++;
 647         }
 648 }
 649 #endif /* CONFIG_CMDLINE_EDITING */
 650
 651 #define BEGINNING_OF_LINE() {                   \
 652         while (num) {                           \
 653                 getcmd_putch(CTL_BACKSPACE);    \
 654                 num--;                          \
 655         }                                       \
 656 }
 657
 658 #define ERASE_TO_EOL() {                                \
 659         if (num < eol_num) {                            \
 660                 int tmp;                                \
 661                 for (tmp = num; tmp < eol_num; tmp++)   \
 662                         getcmd_putch(' ');              \
 663                 while (tmp-- > num)                     \
 664                         getcmd_putch(CTL_BACKSPACE);    \
 665                 eol_num = num;                          \
 666         }                                               \
 667 }
 668
 669 #define REFRESH_TO_EOL() {                      \
 670         if (num < eol_num) {                    \
 671                 wlen = eol_num - num;           \
 672                 putnstr(buf + num, wlen);       \
 673                 num = eol_num;                  \
 674         }                                       \
 675 }
 676
 677 static void cread_add_char(char ichar, int insert, unsigned long *num,
 678                unsigned long *eol_num, char *buf, unsigned long len)
 679 {
 680         unsigned long wlen;
 681
 682         /* room ??? */
 683         if (insert || *num == *eol_num) {
 684                 if (*eol_num > len - 1) {
 685                         getcmd_cbeep();
 686                         return;
 687                 }
 688                 (*eol_num)++;
 689         }
 690
 691         if (insert) {
 692                 wlen = *eol_num - *num;
 693                 if (wlen > 1) {
 694                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 695                 }
 696
 697                 buf[*num] = ichar;
 698                 putnstr(buf + *num, wlen);
 699                 (*num)++;
 700                 while (--wlen) {
 701                         getcmd_putch(CTL_BACKSPACE);
 702                 }
 703         } else {
 704                 /* echo the character */
 705                 wlen = 1;
 706                 buf[*num] = ichar;
 707                 putnstr(buf + *num, wlen);
 708                 (*num)++;
 709         }
 710 }
 711
 712 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 713               unsigned long *eol_num, char *buf, unsigned long len)
 714 {
 715         while (strsize--) {
 716                 cread_add_char(*str, insert, num, eol_num, buf, len);
 717                 str++;
 718         }
 719 }
 720
 721 static int cread_line(char *buf, unsigned int *len)
 722 {
 723         unsigned long num = 0;
 724         unsigned long eol_num = 0;
 725         unsigned long rlen;
 726         unsigned long wlen;
 727         char ichar;
 728         int insert = 1;
 729         int esc_len = 0;
 730         int rc = 0;
 731         char esc_save[8];
 732
 733         while (1) {
 734                 rlen = 1;
 735                 ichar = getcmd_getch();
 736
 737                 if ((ichar == '\n') || (ichar == '\r')) {
 738                         putc('\n');
 739                         break;
 740                 }
 741
 742                 /*
 743                  * handle standard linux xterm esc sequences for arrow key, etc.
 744                  */
 745                 if (esc_len != 0) {
 746                         if (esc_len == 1) {
 747                                 if (ichar == '[') {
 748                                         esc_save[esc_len] = ichar;
 749                                         esc_len = 2;
 750                                 } else {
 751                                         cread_add_str(esc_save, esc_len, insert,
 752                                                       &num, &eol_num, buf, *len);
 753                                         esc_len = 0;
 754                                 }
 755                                 continue;
 756                         }
 757
 758                         switch (ichar) {
 759
 760                         case 'D':       /* <- key */
 761                                 ichar = CTL_CH('b');
 762                                 esc_len = 0;
 763                                 break;
 764                         case 'C':       /* -> key */
 765                                 ichar = CTL_CH('f');
 766                                 esc_len = 0;
 767                                 break;  /* pass off to ^F handler */
 768                         case 'H':       /* Home key */
 769                                 ichar = CTL_CH('a');
 770                                 esc_len = 0;
 771                                 break;  /* pass off to ^A handler */
 772                         case 'A':       /* up arrow */
 773                                 ichar = CTL_CH('p');
 774                                 esc_len = 0;
 775                                 break;  /* pass off to ^P handler */
 776                         case 'B':       /* down arrow */
 777                                 ichar = CTL_CH('n');
 778                                 esc_len = 0;
 779                                 break;  /* pass off to ^N handler */
 780                         default:
 781                                 esc_save[esc_len++] = ichar;
 782                                 cread_add_str(esc_save, esc_len, insert,
 783                                               &num, &eol_num, buf, *len);
 784                                 esc_len = 0;
 785                                 continue;
 786                         }
 787                 }
 788
 789                 switch (ichar) {
 790                 case 0x1b:
 791                         if (esc_len == 0) {
 792                                 esc_save[esc_len] = ichar;
 793                                 esc_len = 1;
 794                         } else {
 795                                 puts("impossible condition #876\n");
 796                                 esc_len = 0;
 797                         }
 798                         break;
 799
 800                 case CTL_CH('a'):
 801                         BEGINNING_OF_LINE();
 802                         break;
 803                 case CTL_CH('c'):       /* ^C - break */
 804                         *buf = '\0';    /* discard input */
 805                         return (-1);
 806                 case CTL_CH('f'):
 807                         if (num < eol_num) {
 808                                 getcmd_putch(buf[num]);
 809                                 num++;
 810                         }
 811                         break;
 812                 case CTL_CH('b'):
 813                         if (num) {
 814                                 getcmd_putch(CTL_BACKSPACE);
 815                                 num--;
 816                         }
 817                         break;
 818                 case CTL_CH('d'):
 819                         if (num < eol_num) {
 820                                 wlen = eol_num - num - 1;
 821                                 if (wlen) {
 822                                         memmove(&buf[num], &buf[num+1], wlen);
 823                                         putnstr(buf + num, wlen);
 824                                 }
 825
 826                                 getcmd_putch(' ');
 827                                 do {
 828                                         getcmd_putch(CTL_BACKSPACE);
 829                                 } while (wlen--);
 830                                 eol_num--;
 831                         }
 832                         break;
 833                 case CTL_CH('k'):
 834                         ERASE_TO_EOL();
 835                         break;
 836                 case CTL_CH('e'):
 837                         REFRESH_TO_EOL();
 838                         break;
 839                 case CTL_CH('o'):
 840                         insert = !insert;
 841                         break;
 842                 case CTL_CH('x'):
 843                         BEGINNING_OF_LINE();
 844                         ERASE_TO_EOL();
 845                         break;
 846                 case DEL:
 847                 case DEL7:
 848                 case 8:
 849                         if (num) {
 850                                 wlen = eol_num - num;
 851                                 num--;
 852                                 memmove(&buf[num], &buf[num+1], wlen);
 853                                 getcmd_putch(CTL_BACKSPACE);
 854                                 putnstr(buf + num, wlen);
 855                                 getcmd_putch(' ');
 856                                 do {
 857                                         getcmd_putch(CTL_BACKSPACE);
 858                                 } while (wlen--);
 859                                 eol_num--;
 860                         }
 861                         break;
 862                 case CTL_CH('p'):
 863                 case CTL_CH('n'):
 864                 {
 865                         char * hline;
 866
 867                         esc_len = 0;
 868
 869                         if (ichar == CTL_CH('p'))
 870                                 hline = hist_prev();
 871                         else
 872                                 hline = hist_next();
 873
 874                         if (!hline) {
 875                                 getcmd_cbeep();
 876                                 continue;
 877                         }
 878
 879                         /* nuke the current line */
 880                         /* first, go home */
 881                         BEGINNING_OF_LINE();
 882
 883                         /* erase to end of line */
 884                         ERASE_TO_EOL();
 885
 886                         /* copy new line into place and display */
 887                         strcpy(buf, hline);
 888                         eol_num = strlen(buf);
 889                         REFRESH_TO_EOL();
 890                         continue;
 891                 }
 892                 default:
 893                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 894                         break;
 895                 }
 896         }
 897         *len = eol_num;
 898         buf[eol_num] = '\0';    /* lose the newline */
 899
 900         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 901                 cread_add_to_hist(buf);
 902         hist_cur = hist_add_idx;
 903
 904         return (rc);
 905 }
 906
 907 #endif /* CONFIG_CMDLINE_EDITING */
 908
 909 /****************************************************************************/
 910
 911 /*
 912  * Prompt for input and read a line.
 913  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 914  * time out when time goes past endtime (timebase time in ticks).
 915  * Return:      number of read characters
 916  *              -1 if break
 917  *              -2 if timed out
 918  */
 919 int readline (const char *const prompt)
 920 {
 921 #ifdef CONFIG_CMDLINE_EDITING
 922         char *p = console_buffer;
 923         unsigned int len=MAX_CMDBUF_SIZE;
 924         int rc;
 925         static int initted = 0;
 926
 927         if (!initted) {
 928                 hist_init();
 929                 initted = 1;
 930         }
 931
 932         puts (prompt);
 933
 934         rc = cread_line(p, &len);
 935         return rc < 0 ? rc : len;
 936 #else
 937         char   *p = console_buffer;
 938         int     n = 0;                          /* buffer index         */
 939         int     plen = 0;                       /* prompt length        */
 940         int     col;                            /* output column cnt    */
 941         char    c;
 942
 943         /* print prompt */
 944         if (prompt) {
 945                 plen = strlen (prompt);
 946                 puts (prompt);
 947         }
 948         col = plen;
 949
 950         for (;;) {
 951 #ifdef CONFIG_BOOT_RETRY_TIME
 952                 while (!tstc()) {       /* while no incoming data */
 953                         if (retry_time >= 0 && get_ticks() > endtime)
 954                                 return (-2);    /* timed out */
 955                 }
 956 #endif
 957                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 958
 959 #ifdef CONFIG_SHOW_ACTIVITY
 960                 while (!tstc()) {
 961                         extern void show_activity(int arg);
 962                         show_activity(0);
 963                 }
 964 #endif
 965                 c = getc();
 966
 967                 /*
 968                  * Special character handling
 969                  */
 970                 switch (c) {
 971                 case '\r':                              /* Enter                */
 972                 case '\n':
 973                         *p = '\0';
 974                         puts ("\r\n");
 975                         return (p - console_buffer);
 976
 977                 case '\0':                              /* nul                  */
 978                         continue;
 979
 980                 case 0x03:                              /* ^C - break           */
 981                         console_buffer[0] = '\0';       /* discard input */
 982                         return (-1);
 983
 984                 case 0x15:                              /* ^U - erase line      */
 985                         while (col > plen) {
 986                                 puts (erase_seq);
 987                                 --col;
 988                         }
 989                         p = console_buffer;
 990                         n = 0;
 991                         continue;
 992
 993                 case 0x17:                              /* ^W - erase word      */
 994                         p=delete_char(console_buffer, p, &col, &n, plen);
 995                         while ((n > 0) && (*p != ' ')) {
 996                                 p=delete_char(console_buffer, p, &col, &n, plen);
 997                         }
 998                         continue;
 999
1000                 case 0x08:                              /* ^H  - backspace      */
1001                 case 0x7F:                              /* DEL - backspace      */
1002                         p=delete_char(console_buffer, p, &col, &n, plen);
1003                         continue;
1004
1005                 default:
1006                         /*
1007                          * Must be a normal character then
1008                          */
1009                         if (n < CFG_CBSIZE-2) {
1010                                 if (c == '\t') {        /* expand TABs          */
1011 #ifdef CONFIG_AUTO_COMPLETE
1012                                         /* if auto completion triggered just continue */
1013                                         *p = '\0';
1014                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1015                                                 p = console_buffer + n; /* reset */
1016                                                 continue;
1017                                         }
1018 #endif
1019                                         puts (tab_seq+(col&07));
1020                                         col += 8 - (col&07);
1021                                 } else {
1022                                         ++col;          /* echo input           */
1023                                         putc (c);
1024                                 }
1025                                 *p++ = c;
1026                                 ++n;
1027                         } else {                        /* Buffer full          */
1028                                 putc ('\a');
1029                         }
1030                 }
1031         }
1032 #endif /* CONFIG_CMDLINE_EDITING */
1033 }
1034
1035 /****************************************************************************/
1036
1037 #ifndef CONFIG_CMDLINE_EDITING
1038 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1039 {
1040         char *s;
1041
1042         if (*np == 0) {
1043                 return (p);
1044         }
1045
1046         if (*(--p) == '\t') {                   /* will retype the whole line   */
1047                 while (*colp > plen) {
1048                         puts (erase_seq);
1049                         (*colp)--;
1050                 }
1051                 for (s=buffer; s<p; ++s) {
1052                         if (*s == '\t') {
1053                                 puts (tab_seq+((*colp) & 07));
1054                                 *colp += 8 - ((*colp) & 07);
1055                         } else {
1056                                 ++(*colp);
1057                                 putc (*s);
1058                         }
1059                 }
1060         } else {
1061                 puts (erase_seq);
1062                 (*colp)--;
1063         }
1064         (*np)--;
1065         return (p);
1066 }
1067 #endif /* CONFIG_CMDLINE_EDITING */
1068
1069 /****************************************************************************/
1070
1071 int parse_line (char *line, char *argv[])
1072 {
1073         int nargs = 0;
1074
1075 #ifdef DEBUG_PARSER
1076         printf ("parse_line: \"%s\"\n", line);
1077 #endif
1078         while (nargs < CFG_MAXARGS) {
1079
1080                 /* skip any white space */
1081                 while ((*line == ' ') || (*line == '\t')) {
1082                         ++line;
1083                 }
1084
1085                 if (*line == '\0') {    /* end of line, no more args    */
1086                         argv[nargs] = NULL;
1087 #ifdef DEBUG_PARSER
1088                 printf ("parse_line: nargs=%d\n", nargs);
1089 #endif
1090                         return (nargs);
1091                 }
1092
1093                 argv[nargs++] = line;   /* begin of argument string     */
1094
1095                 /* find end of string */
1096                 while (*line && (*line != ' ') && (*line != '\t')) {
1097                         ++line;
1098                 }
1099
1100                 if (*line == '\0') {    /* end of line, no more args    */
1101                         argv[nargs] = NULL;
1102 #ifdef DEBUG_PARSER
1103                 printf ("parse_line: nargs=%d\n", nargs);
1104 #endif
1105                         return (nargs);
1106                 }
1107
1108                 *line++ = '\0';         /* terminate current arg         */
1109         }
1110
1111         printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
1112
1113 #ifdef DEBUG_PARSER
1114         printf ("parse_line: nargs=%d\n", nargs);
1115 #endif
1116         return (nargs);
1117 }
1118
1119 /****************************************************************************/
1120
1121 static void process_macros (const char *input, char *output)
1122 {
1123         char c, prev;
1124         const char *varname_start = NULL;
1125         int inputcnt = strlen (input);
1126         int outputcnt = CFG_CBSIZE;
1127         int state = 0;          /* 0 = waiting for '$'  */
1128
1129         /* 1 = waiting for '(' or '{' */
1130         /* 2 = waiting for ')' or '}' */
1131         /* 3 = waiting for '''  */
1132 #ifdef DEBUG_PARSER
1133         char *output_start = output;
1134
1135         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1136                 input);
1137 #endif
1138
1139         prev = '\0';            /* previous character   */
1140
1141         while (inputcnt && outputcnt) {
1142                 c = *input++;
1143                 inputcnt--;
1144
1145                 if (state != 3) {
1146                         /* remove one level of escape characters */
1147                         if ((c == '\\') && (prev != '\\')) {
1148                                 if (inputcnt-- == 0)
1149                                         break;
1150                                 prev = c;
1151                                 c = *input++;
1152                         }
1153                 }
1154
1155                 switch (state) {
1156                 case 0: /* Waiting for (unescaped) $    */
1157                         if ((c == '\'') && (prev != '\\')) {
1158                                 state = 3;
1159                                 break;
1160                         }
1161                         if ((c == '$') && (prev != '\\')) {
1162                                 state++;
1163                         } else {
1164                                 *(output++) = c;
1165                                 outputcnt--;
1166                         }
1167                         break;
1168                 case 1: /* Waiting for (        */
1169                         if (c == '(' || c == '{') {
1170                                 state++;
1171                                 varname_start = input;
1172                         } else {
1173                                 state = 0;
1174                                 *(output++) = '$';
1175                                 outputcnt--;
1176
1177                                 if (outputcnt) {
1178                                         *(output++) = c;
1179                                         outputcnt--;
1180                                 }
1181                         }
1182                         break;
1183                 case 2: /* Waiting for )        */
1184                         if (c == ')' || c == '}') {
1185                                 int i;
1186                                 char envname[CFG_CBSIZE], *envval;
1187                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1188
1189                                 /* Get the varname */
1190                                 for (i = 0; i < envcnt; i++) {
1191                                         envname[i] = varname_start[i];
1192                                 }
1193                                 envname[i] = 0;
1194
1195                                 /* Get its value */
1196                                 envval = getenv (envname);
1197
1198                                 /* Copy into the line if it exists */
1199                                 if (envval != NULL)
1200                                         while ((*envval) && outputcnt) {
1201                                                 *(output++) = *(envval++);
1202                                                 outputcnt--;
1203                                         }
1204                                 /* Look for another '$' */
1205                                 state = 0;
1206                         }
1207                         break;
1208                 case 3: /* Waiting for '        */
1209                         if ((c == '\'') && (prev != '\\')) {
1210                                 state = 0;
1211                         } else {
1212                                 *(output++) = c;
1213                                 outputcnt--;
1214                         }
1215                         break;
1216                 }
1217                 prev = c;
1218         }
1219
1220         if (outputcnt)
1221                 *output = 0;
1222
1223 #ifdef DEBUG_PARSER
1224         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1225                 strlen (output_start), output_start);
1226 #endif
1227 }
1228
1229 /****************************************************************************
1230  * returns:
1231  *      1  - command executed, repeatable
1232  *      0  - command executed but not repeatable, interrupted commands are
1233  *           always considered not repeatable
1234  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1235  *           (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
1236  *           considered unrecognized)
1237  *
1238  * WARNING:
1239  *
1240  * We must create a temporary copy of the command since the command we get
1241  * may be the result from getenv(), which returns a pointer directly to
1242  * the environment data, which may change magicly when the command we run
1243  * creates or modifies environment variables (like "bootp" does).
1244  */
1245
1246 int run_command (const char *cmd, int flag)
1247 {
1248         cmd_tbl_t *cmdtp;
1249         char cmdbuf[CFG_CBSIZE];        /* working copy of cmd          */
1250         char *token;                    /* start of token in cmdbuf     */
1251         char *sep;                      /* end of token (separator) in cmdbuf */
1252         char finaltoken[CFG_CBSIZE];
1253         char *str = cmdbuf;
1254         char *argv[CFG_MAXARGS + 1];    /* NULL terminated      */
1255         int argc, inquotes;
1256         int repeatable = 1;
1257         int rc = 0;
1258
1259 #ifdef DEBUG_PARSER
1260         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1261         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1262         puts ("\"\n");
1263 #endif
1264
1265         clear_ctrlc();          /* forget any previous Control C */
1266
1267         if (!cmd || !*cmd) {
1268                 return -1;      /* empty command */
1269         }
1270
1271         if (strlen(cmd) >= CFG_CBSIZE) {
1272                 puts ("## Command too long!\n");
1273                 return -1;
1274         }
1275
1276         strcpy (cmdbuf, cmd);
1277
1278         /* Process separators and check for invalid
1279          * repeatable commands
1280          */
1281
1282 #ifdef DEBUG_PARSER
1283         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1284 #endif
1285         while (*str) {
1286
1287                 /*
1288                  * Find separator, or string end
1289                  * Allow simple escape of ';' by writing "\;"
1290                  */
1291                 for (inquotes = 0, sep = str; *sep; sep++) {
1292                         if ((*sep=='\'') &&
1293                             (*(sep-1) != '\\'))
1294                                 inquotes=!inquotes;
1295
1296                         if (!inquotes &&
1297                             (*sep == ';') &&    /* separator            */
1298                             ( sep != str) &&    /* past string start    */
1299                             (*(sep-1) != '\\')) /* and NOT escaped      */
1300                                 break;
1301                 }
1302
1303                 /*
1304                  * Limit the token to data between separators
1305                  */
1306                 token = str;
1307                 if (*sep) {
1308                         str = sep + 1;  /* start of command for next pass */
1309                         *sep = '\0';
1310                 }
1311                 else
1312                         str = sep;      /* no more commands for next pass */
1313 #ifdef DEBUG_PARSER
1314                 printf ("token: \"%s\"\n", token);
1315 #endif
1316
1317                 /* find macros in this token and replace them */
1318                 process_macros (token, finaltoken);
1319
1320                 /* Extract arguments */
1321                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1322                         rc = -1;        /* no command at all */
1323                         continue;
1324                 }
1325
1326                 /* Look up command in command table */
1327                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1328                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1329                         rc = -1;        /* give up after bad command */
1330                         continue;
1331                 }
1332
1333                 /* found - check max args */
1334                 if (argc > cmdtp->maxargs) {
1335                         printf ("Usage:\n%s\n", cmdtp->usage);
1336                         rc = -1;
1337                         continue;
1338                 }
1339
1340 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
1341                 /* avoid "bootd" recursion */
1342                 if (cmdtp->cmd == do_bootd) {
1343 #ifdef DEBUG_PARSER
1344                         printf ("[%s]\n", finaltoken);
1345 #endif
1346                         if (flag & CMD_FLAG_BOOTD) {
1347                                 puts ("'bootd' recursion detected\n");
1348                                 rc = -1;
1349                                 continue;
1350                         } else {
1351                                 flag |= CMD_FLAG_BOOTD;
1352                         }
1353                 }
1354 #endif  /* CFG_CMD_BOOTD */
1355
1356                 /* OK - call function to do the command */
1357                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1358                         rc = -1;
1359                 }
1360
1361                 repeatable &= cmdtp->repeatable;
1362
1363                 /* Did the user stop this? */
1364                 if (had_ctrlc ())
1365                         return 0;       /* if stopped then not repeatable */
1366         }
1367
1368         return rc ? rc : repeatable;
1369 }
1370
1371 /****************************************************************************/
1372
1373 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
1374 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1375 {
1376         int i;
1377
1378         if (argc < 2) {
1379                 printf ("Usage:\n%s\n", cmdtp->usage);
1380                 return 1;
1381         }
1382
1383         for (i=1; i<argc; ++i) {
1384                 char *arg;
1385
1386                 if ((arg = getenv (argv[i])) == NULL) {
1387                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1388                         return 1;
1389                 }
1390 #ifndef CFG_HUSH_PARSER
1391                 if (run_command (arg, flag) == -1)
1392                         return 1;
1393 #else
1394                 if (parse_string_outer(arg,
1395                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1396                         return 1;
1397 #endif
1398         }
1399         return 0;
1400 }
1401 #endif  /* CFG_CMD_RUN */