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 /*
  48  * Board-specific Platform code can reimplement show_boot_progress () if needed
  49  */
  50 void inline __show_boot_progress (int val) {}
  51 void inline 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 *argv[]);               /* for do_reset() prototype */
  55 #endif
  56
  57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  58
  59
  60 #define MAX_DELAY_STOP_STR 32
  61
  62 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  63 static int abortboot(int);
  64 #endif
  65
  66 #undef DEBUG_PARSER
  67
  68 char        console_buffer[CFG_CBSIZE];         /* console I/O buffer   */
  69
  70 #ifndef CONFIG_CMDLINE_EDITING
  71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  72 static char erase_seq[] = "\b \b";              /* erase sequence       */
  73 static char   tab_seq[] = "        ";           /* used to expand TABs  */
  74 #endif /* CONFIG_CMDLINE_EDITING */
  75
  76 #ifdef CONFIG_BOOT_RETRY_TIME
  77 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  78 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  79 #endif
  80
  81 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  82
  83 #ifndef CONFIG_BOOT_RETRY_MIN
  84 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  85 #endif
  86
  87 #ifdef CONFIG_MODEM_SUPPORT
  88 int do_mdm_init = 0;
  89 extern void mdm_init(void); /* defined in board.c */
  90 #endif
  91
  92 /***************************************************************************
  93  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  94  * returns: 0 -  no key string, allow autoboot
  95  *          1 - got key string, abort
  96  */
  97 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  98 # if defined(CONFIG_AUTOBOOT_KEYED)
  99 static __inline__ int abortboot(int bootdelay)
 100 {
 101         int abort = 0;
 102         uint64_t etime = endtick(bootdelay);
 103         struct {
 104                 char* str;
 105                 u_int len;
 106                 int retry;
 107         }
 108         delaykey [] = {
 109                 { str: getenv ("bootdelaykey"),  retry: 1 },
 110                 { str: getenv ("bootdelaykey2"), retry: 1 },
 111                 { str: getenv ("bootstopkey"),   retry: 0 },
 112                 { str: getenv ("bootstopkey2"),  retry: 0 },
 113         };
 114
 115         char presskey [MAX_DELAY_STOP_STR];
 116         u_int presskey_len = 0;
 117         u_int presskey_max = 0;
 118         u_int i;
 119
 120 #  ifdef CONFIG_AUTOBOOT_PROMPT
 121         printf(CONFIG_AUTOBOOT_PROMPT, bootdelay);
 122 #  endif
 123
 124 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 125         if (delaykey[0].str == NULL)
 126                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 127 #  endif
 128 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 129         if (delaykey[1].str == NULL)
 130                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 131 #  endif
 132 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 133         if (delaykey[2].str == NULL)
 134                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 135 #  endif
 136 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 137         if (delaykey[3].str == NULL)
 138                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 139 #  endif
 140
 141         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 142                 delaykey[i].len = delaykey[i].str == NULL ?
 143                                     0 : strlen (delaykey[i].str);
 144                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 145                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 146
 147                 presskey_max = presskey_max > delaykey[i].len ?
 148                                     presskey_max : delaykey[i].len;
 149
 150 #  if DEBUG_BOOTKEYS
 151                 printf("%s key:<%s>\n",
 152                        delaykey[i].retry ? "delay" : "stop",
 153                        delaykey[i].str ? delaykey[i].str : "NULL");
 154 #  endif
 155         }
 156
 157         /* In order to keep up with incoming data, check timeout only
 158          * when catch up.
 159          */
 160         while (!abort && get_ticks() <= etime) {
 161                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 162                         if (delaykey[i].len > 0 &&
 163                             presskey_len >= delaykey[i].len &&
 164                             memcmp (presskey + presskey_len - delaykey[i].len,
 165                                     delaykey[i].str,
 166                                     delaykey[i].len) == 0) {
 167 #  if DEBUG_BOOTKEYS
 168                                 printf("got %skey\n",
 169                                        delaykey[i].retry ? "delay" : "stop");
 170 #  endif
 171
 172 #  ifdef CONFIG_BOOT_RETRY_TIME
 173                                 /* don't retry auto boot */
 174                                 if (! delaykey[i].retry)
 175                                         retry_time = -1;
 176 #  endif
 177                                 abort = 1;
 178                         }
 179                 }
 180
 181                 if (tstc()) {
 182                         if (presskey_len < presskey_max) {
 183                                 presskey [presskey_len ++] = getc();
 184                         }
 185                         else {
 186                                 for (i = 0; i < presskey_max - 1; i ++)
 187                                         presskey [i] = presskey [i + 1];
 188
 189                                 presskey [i] = getc();
 190                         }
 191                 }
 192         }
 193 #  if DEBUG_BOOTKEYS
 194         if (!abort)
 195                 puts("key timeout\n");
 196 #  endif
 197
 198 #ifdef CONFIG_SILENT_CONSOLE
 199         if (abort)
 200                 gd->flags &= ~GD_FLG_SILENT;
 201 #endif
 202
 203         return abort;
 204 }
 205
 206 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 207
 208 #ifdef CONFIG_MENUKEY
 209 static int menukey = 0;
 210 #endif
 211
 212 static __inline__ int abortboot(int bootdelay)
 213 {
 214         int abort = 0;
 215
 216 #ifdef CONFIG_MENUPROMPT
 217         printf(CONFIG_MENUPROMPT, bootdelay);
 218 #else
 219         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 220 #endif
 221
 222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 223         /*
 224          * Check if key already pressed
 225          * Don't check if bootdelay < 0
 226          */
 227         if (bootdelay >= 0) {
 228                 if (tstc()) {   /* we got a key press   */
 229                         (void) getc();  /* consume input        */
 230                         puts ("\b\b\b 0");
 231                         abort = 1;      /* don't auto boot      */
 232                 }
 233         }
 234 #endif
 235
 236         while ((bootdelay > 0) && (!abort)) {
 237                 int i;
 238
 239                 --bootdelay;
 240                 /* delay 100 * 10ms */
 241                 for (i=0; !abort && i<100; ++i) {
 242                         if (tstc()) {   /* we got a key press   */
 243                                 abort  = 1;     /* don't auto boot      */
 244                                 bootdelay = 0;  /* no more delay        */
 245 # ifdef CONFIG_MENUKEY
 246                                 menukey = getc();
 247 # else
 248                                 (void) getc();  /* consume input        */
 249 # endif
 250                                 break;
 251                         }
 252                         udelay(10000);
 253                 }
 254
 255                 printf("\b\b\b%2d ", bootdelay);
 256         }
 257
 258         putc('\n');
 259
 260 #ifdef CONFIG_SILENT_CONSOLE
 261         if (abort)
 262                 gd->flags &= ~GD_FLG_SILENT;
 263 #endif
 264
 265         return abort;
 266 }
 267 # endif /* CONFIG_AUTOBOOT_KEYED */
 268 #endif  /* CONFIG_BOOTDELAY >= 0  */
 269
 270 /****************************************************************************/
 271
 272 void main_loop (void)
 273 {
 274 #ifndef CFG_HUSH_PARSER
 275         static char lastcommand[CFG_CBSIZE] = { 0, };
 276         int len;
 277         int rc = 1;
 278         int flag;
 279 #endif
 280
 281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 282         char *s;
 283         int bootdelay;
 284 #endif
 285 #ifdef CONFIG_PREBOOT
 286         char *p;
 287 #endif
 288 #ifdef CONFIG_BOOTCOUNT_LIMIT
 289         unsigned long bootcount = 0;
 290         unsigned long bootlimit = 0;
 291         char *bcs;
 292         char bcs_set[16];
 293 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 294
 295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
 296         ulong bmp = 0;          /* default bitmap */
 297         extern int trab_vfd (ulong bitmap);
 298
 299 #ifdef CONFIG_MODEM_SUPPORT
 300         if (do_mdm_init)
 301                 bmp = 1;        /* alternate bitmap */
 302 #endif
 303         trab_vfd (bmp);
 304 #endif  /* CONFIG_VFD && VFD_TEST_LOGO */
 305
 306 #ifdef CONFIG_BOOTCOUNT_LIMIT
 307         bootcount = bootcount_load();
 308         bootcount++;
 309         bootcount_store (bootcount);
 310         sprintf (bcs_set, "%lu", bootcount);
 311         setenv ("bootcount", bcs_set);
 312         bcs = getenv ("bootlimit");
 313         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 315
 316 #ifdef CONFIG_MODEM_SUPPORT
 317         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 318         if (do_mdm_init) {
 319                 char *str = strdup(getenv("mdm_cmd"));
 320                 setenv ("preboot", str);  /* set or delete definition */
 321                 if (str != NULL)
 322                         free (str);
 323                 mdm_init(); /* wait for modem connection */
 324         }
 325 #endif  /* CONFIG_MODEM_SUPPORT */
 326
 327 #ifdef CONFIG_VERSION_VARIABLE
 328         {
 329                 extern char version_string[];
 330
 331                 setenv ("ver", version_string);  /* set version variable */
 332         }
 333 #endif /* CONFIG_VERSION_VARIABLE */
 334
 335 #ifdef CFG_HUSH_PARSER
 336         u_boot_hush_start ();
 337 #endif
 338
 339 #ifdef CONFIG_AUTO_COMPLETE
 340         install_auto_complete();
 341 #endif
 342
 343 #ifdef CONFIG_PREBOOT
 344         if ((p = getenv ("preboot")) != NULL) {
 345 # ifdef CONFIG_AUTOBOOT_KEYED
 346                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 347 # endif
 348
 349 # ifndef CFG_HUSH_PARSER
 350                 run_command (p, 0);
 351 # else
 352                 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
 353                                     FLAG_EXIT_FROM_LOOP);
 354 # endif
 355
 356 # ifdef CONFIG_AUTOBOOT_KEYED
 357                 disable_ctrlc(prev);    /* restore Control C checking */
 358 # endif
 359         }
 360 #endif /* CONFIG_PREBOOT */
 361
 362 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 363         s = getenv ("bootdelay");
 364         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 365
 366         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 367
 368 # ifdef CONFIG_BOOT_RETRY_TIME
 369         init_cmd_timeout ();
 370 # endif /* CONFIG_BOOT_RETRY_TIME */
 371
 372 #ifdef CONFIG_BOOTCOUNT_LIMIT
 373         if (bootlimit && (bootcount > bootlimit)) {
 374                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 375                         (unsigned)bootlimit);
 376                 s = getenv ("altbootcmd");
 377         }
 378         else
 379 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 380                 s = getenv ("bootcmd");
 381
 382         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 383
 384         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 385 # ifdef CONFIG_AUTOBOOT_KEYED
 386                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 387 # endif
 388
 389 # ifndef CFG_HUSH_PARSER
 390                 run_command (s, 0);
 391 # else
 392                 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
 393                                     FLAG_EXIT_FROM_LOOP);
 394 # endif
 395
 396 # ifdef CONFIG_AUTOBOOT_KEYED
 397                 disable_ctrlc(prev);    /* restore Control C checking */
 398 # endif
 399         }
 400
 401 # ifdef CONFIG_MENUKEY
 402         if (menukey == CONFIG_MENUKEY) {
 403             s = getenv("menucmd");
 404             if (s) {
 405 # ifndef CFG_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         }
 413 #endif /* CONFIG_MENUKEY */
 414 #endif  /* CONFIG_BOOTDELAY */
 415
 416 #ifdef CONFIG_AMIGAONEG3SE
 417         {
 418             extern void video_banner(void);
 419             video_banner();
 420         }
 421 #endif
 422
 423         /*
 424          * Main Loop for Monitor Command Processing
 425          */
 426 #ifdef CFG_HUSH_PARSER
 427         parse_file_outer();
 428         /* This point is never reached */
 429         for (;;);
 430 #else
 431         for (;;) {
 432 #ifdef CONFIG_BOOT_RETRY_TIME
 433                 if (rc >= 0) {
 434                         /* Saw enough of a valid command to
 435                          * restart the timeout.
 436                          */
 437                         reset_cmd_timeout();
 438                 }
 439 #endif
 440                 len = readline (CFG_PROMPT);
 441
 442                 flag = 0;       /* assume no special flags for now */
 443                 if (len > 0)
 444                         strcpy (lastcommand, console_buffer);
 445                 else if (len == 0)
 446                         flag |= CMD_FLAG_REPEAT;
 447 #ifdef CONFIG_BOOT_RETRY_TIME
 448                 else if (len == -2) {
 449                         /* -2 means timed out, retry autoboot
 450                          */
 451                         puts ("\nTimed out waiting for command\n");
 452 # ifdef CONFIG_RESET_TO_RETRY
 453                         /* Reinit board to run initialization code again */
 454                         do_reset (NULL, 0, 0, NULL);
 455 # else
 456                         return;         /* retry autoboot */
 457 # endif
 458                 }
 459 #endif
 460
 461                 if (len == -1)
 462                         puts ("<INTERRUPT>\n");
 463                 else
 464                         rc = run_command (lastcommand, flag);
 465
 466                 if (rc <= 0) {
 467                         /* invalid command or not repeatable, forget it */
 468                         lastcommand[0] = 0;
 469                 }
 470         }
 471 #endif /*CFG_HUSH_PARSER*/
 472 }
 473
 474 #ifdef CONFIG_BOOT_RETRY_TIME
 475 /***************************************************************************
 476  * initialize command line timeout
 477  */
 478 void init_cmd_timeout(void)
 479 {
 480         char *s = getenv ("bootretry");
 481
 482         if (s != NULL)
 483                 retry_time = (int)simple_strtol(s, NULL, 10);
 484         else
 485                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 486
 487         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 488                 retry_time = CONFIG_BOOT_RETRY_MIN;
 489 }
 490
 491 /***************************************************************************
 492  * reset command line timeout to retry_time seconds
 493  */
 494 void reset_cmd_timeout(void)
 495 {
 496         endtime = endtick(retry_time);
 497 }
 498 #endif
 499
 500 #ifdef CONFIG_CMDLINE_EDITING
 501
 502 /*
 503  * cmdline-editing related codes from vivi.
 504  * Author: Janghoon Lyu <nandy@mizi.com>
 505  */
 506
 507 #define putnstr(str,n)  do {                    \
 508                 printf ("%.*s", n, str);        \
 509         } while (0)
 510
 511 #define CTL_CH(c)               ((c) - 'a' + 1)
 512
 513 #define MAX_CMDBUF_SIZE         256
 514
 515 #define CTL_BACKSPACE           ('\b')
 516 #define DEL                     ((char)255)
 517 #define DEL7                    ((char)127)
 518 #define CREAD_HIST_CHAR         ('!')
 519
 520 #define getcmd_putch(ch)        putc(ch)
 521 #define getcmd_getch()          getc()
 522 #define getcmd_cbeep()          getcmd_putch('\a')
 523
 524 #define HIST_MAX                20
 525 #define HIST_SIZE               MAX_CMDBUF_SIZE
 526
 527 static int hist_max = 0;
 528 static int hist_add_idx = 0;
 529 static int hist_cur = -1;
 530 unsigned hist_num = 0;
 531
 532 char* hist_list[HIST_MAX];
 533 char hist_lines[HIST_MAX][HIST_SIZE];
 534
 535 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 536
 537 static void hist_init(void)
 538 {
 539         int i;
 540
 541         hist_max = 0;
 542         hist_add_idx = 0;
 543         hist_cur = -1;
 544         hist_num = 0;
 545
 546         for (i = 0; i < HIST_MAX; i++) {
 547                 hist_list[i] = hist_lines[i];
 548                 hist_list[i][0] = '\0';
 549         }
 550 }
 551
 552 static void cread_add_to_hist(char *line)
 553 {
 554         strcpy(hist_list[hist_add_idx], line);
 555
 556         if (++hist_add_idx >= HIST_MAX)
 557                 hist_add_idx = 0;
 558
 559         if (hist_add_idx > hist_max)
 560                 hist_max = hist_add_idx;
 561
 562         hist_num++;
 563 }
 564
 565 static char* hist_prev(void)
 566 {
 567         char *ret;
 568         int old_cur;
 569
 570         if (hist_cur < 0)
 571                 return NULL;
 572
 573         old_cur = hist_cur;
 574         if (--hist_cur < 0)
 575                 hist_cur = hist_max;
 576
 577         if (hist_cur == hist_add_idx) {
 578                 hist_cur = old_cur;
 579                 ret = NULL;
 580         } else
 581                 ret = hist_list[hist_cur];
 582
 583         return (ret);
 584 }
 585
 586 static char* hist_next(void)
 587 {
 588         char *ret;
 589
 590         if (hist_cur < 0)
 591                 return NULL;
 592
 593         if (hist_cur == hist_add_idx)
 594                 return NULL;
 595
 596         if (++hist_cur > hist_max)
 597                 hist_cur = 0;
 598
 599         if (hist_cur == hist_add_idx) {
 600                 ret = "";
 601         } else
 602                 ret = hist_list[hist_cur];
 603
 604         return (ret);
 605 }
 606
 607 #ifndef CONFIG_CMDLINE_EDITING
 608 static void cread_print_hist_list(void)
 609 {
 610         int i;
 611         unsigned long n;
 612
 613         n = hist_num - hist_max;
 614
 615         i = hist_add_idx + 1;
 616         while (1) {
 617                 if (i > hist_max)
 618                         i = 0;
 619                 if (i == hist_add_idx)
 620                         break;
 621                 printf("%s\n", hist_list[i]);
 622                 n++;
 623                 i++;
 624         }
 625 }
 626 #endif /* CONFIG_CMDLINE_EDITING */
 627
 628 #define BEGINNING_OF_LINE() {                   \
 629         while (num) {                           \
 630                 getcmd_putch(CTL_BACKSPACE);    \
 631                 num--;                          \
 632         }                                       \
 633 }
 634
 635 #define ERASE_TO_EOL() {                                \
 636         if (num < eol_num) {                            \
 637                 int tmp;                                \
 638                 for (tmp = num; tmp < eol_num; tmp++)   \
 639                         getcmd_putch(' ');              \
 640                 while (tmp-- > num)                     \
 641                         getcmd_putch(CTL_BACKSPACE);    \
 642                 eol_num = num;                          \
 643         }                                               \
 644 }
 645
 646 #define REFRESH_TO_EOL() {                      \
 647         if (num < eol_num) {                    \
 648                 wlen = eol_num - num;           \
 649                 putnstr(buf + num, wlen);       \
 650                 num = eol_num;                  \
 651         }                                       \
 652 }
 653
 654 static void cread_add_char(char ichar, int insert, unsigned long *num,
 655                unsigned long *eol_num, char *buf, unsigned long len)
 656 {
 657         unsigned long wlen;
 658
 659         /* room ??? */
 660         if (insert || *num == *eol_num) {
 661                 if (*eol_num > len - 1) {
 662                         getcmd_cbeep();
 663                         return;
 664                 }
 665                 (*eol_num)++;
 666         }
 667
 668         if (insert) {
 669                 wlen = *eol_num - *num;
 670                 if (wlen > 1) {
 671                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 672                 }
 673
 674                 buf[*num] = ichar;
 675                 putnstr(buf + *num, wlen);
 676                 (*num)++;
 677                 while (--wlen) {
 678                         getcmd_putch(CTL_BACKSPACE);
 679                 }
 680         } else {
 681                 /* echo the character */
 682                 wlen = 1;
 683                 buf[*num] = ichar;
 684                 putnstr(buf + *num, wlen);
 685                 (*num)++;
 686         }
 687 }
 688
 689 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 690               unsigned long *eol_num, char *buf, unsigned long len)
 691 {
 692         while (strsize--) {
 693                 cread_add_char(*str, insert, num, eol_num, buf, len);
 694                 str++;
 695         }
 696 }
 697
 698 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 699 {
 700         unsigned long num = 0;
 701         unsigned long eol_num = 0;
 702         unsigned long rlen;
 703         unsigned long wlen;
 704         char ichar;
 705         int insert = 1;
 706         int esc_len = 0;
 707         int rc = 0;
 708         char esc_save[8];
 709
 710         while (1) {
 711                 rlen = 1;
 712                 ichar = getcmd_getch();
 713
 714                 if ((ichar == '\n') || (ichar == '\r')) {
 715                         putc('\n');
 716                         break;
 717                 }
 718
 719                 /*
 720                  * handle standard linux xterm esc sequences for arrow key, etc.
 721                  */
 722                 if (esc_len != 0) {
 723                         if (esc_len == 1) {
 724                                 if (ichar == '[') {
 725                                         esc_save[esc_len] = ichar;
 726                                         esc_len = 2;
 727                                 } else {
 728                                         cread_add_str(esc_save, esc_len, insert,
 729                                                       &num, &eol_num, buf, *len);
 730                                         esc_len = 0;
 731                                 }
 732                                 continue;
 733                         }
 734
 735                         switch (ichar) {
 736
 737                         case 'D':       /* <- key */
 738                                 ichar = CTL_CH('b');
 739                                 esc_len = 0;
 740                                 break;
 741                         case 'C':       /* -> key */
 742                                 ichar = CTL_CH('f');
 743                                 esc_len = 0;
 744                                 break;  /* pass off to ^F handler */
 745                         case 'H':       /* Home key */
 746                                 ichar = CTL_CH('a');
 747                                 esc_len = 0;
 748                                 break;  /* pass off to ^A handler */
 749                         case 'A':       /* up arrow */
 750                                 ichar = CTL_CH('p');
 751                                 esc_len = 0;
 752                                 break;  /* pass off to ^P handler */
 753                         case 'B':       /* down arrow */
 754                                 ichar = CTL_CH('n');
 755                                 esc_len = 0;
 756                                 break;  /* pass off to ^N handler */
 757                         default:
 758                                 esc_save[esc_len++] = ichar;
 759                                 cread_add_str(esc_save, esc_len, insert,
 760                                               &num, &eol_num, buf, *len);
 761                                 esc_len = 0;
 762                                 continue;
 763                         }
 764                 }
 765
 766                 switch (ichar) {
 767                 case 0x1b:
 768                         if (esc_len == 0) {
 769                                 esc_save[esc_len] = ichar;
 770                                 esc_len = 1;
 771                         } else {
 772                                 puts("impossible condition #876\n");
 773                                 esc_len = 0;
 774                         }
 775                         break;
 776
 777                 case CTL_CH('a'):
 778                         BEGINNING_OF_LINE();
 779                         break;
 780                 case CTL_CH('c'):       /* ^C - break */
 781                         *buf = '\0';    /* discard input */
 782                         return (-1);
 783                 case CTL_CH('f'):
 784                         if (num < eol_num) {
 785                                 getcmd_putch(buf[num]);
 786                                 num++;
 787                         }
 788                         break;
 789                 case CTL_CH('b'):
 790                         if (num) {
 791                                 getcmd_putch(CTL_BACKSPACE);
 792                                 num--;
 793                         }
 794                         break;
 795                 case CTL_CH('d'):
 796                         if (num < eol_num) {
 797                                 wlen = eol_num - num - 1;
 798                                 if (wlen) {
 799                                         memmove(&buf[num], &buf[num+1], wlen);
 800                                         putnstr(buf + num, wlen);
 801                                 }
 802
 803                                 getcmd_putch(' ');
 804                                 do {
 805                                         getcmd_putch(CTL_BACKSPACE);
 806                                 } while (wlen--);
 807                                 eol_num--;
 808                         }
 809                         break;
 810                 case CTL_CH('k'):
 811                         ERASE_TO_EOL();
 812                         break;
 813                 case CTL_CH('e'):
 814                         REFRESH_TO_EOL();
 815                         break;
 816                 case CTL_CH('o'):
 817                         insert = !insert;
 818                         break;
 819                 case CTL_CH('x'):
 820                 case CTL_CH('u'):
 821                         BEGINNING_OF_LINE();
 822                         ERASE_TO_EOL();
 823                         break;
 824                 case DEL:
 825                 case DEL7:
 826                 case 8:
 827                         if (num) {
 828                                 wlen = eol_num - num;
 829                                 num--;
 830                                 memmove(&buf[num], &buf[num+1], wlen);
 831                                 getcmd_putch(CTL_BACKSPACE);
 832                                 putnstr(buf + num, wlen);
 833                                 getcmd_putch(' ');
 834                                 do {
 835                                         getcmd_putch(CTL_BACKSPACE);
 836                                 } while (wlen--);
 837                                 eol_num--;
 838                         }
 839                         break;
 840                 case CTL_CH('p'):
 841                 case CTL_CH('n'):
 842                 {
 843                         char * hline;
 844
 845                         esc_len = 0;
 846
 847                         if (ichar == CTL_CH('p'))
 848                                 hline = hist_prev();
 849                         else
 850                                 hline = hist_next();
 851
 852                         if (!hline) {
 853                                 getcmd_cbeep();
 854                                 continue;
 855                         }
 856
 857                         /* nuke the current line */
 858                         /* first, go home */
 859                         BEGINNING_OF_LINE();
 860
 861                         /* erase to end of line */
 862                         ERASE_TO_EOL();
 863
 864                         /* copy new line into place and display */
 865                         strcpy(buf, hline);
 866                         eol_num = strlen(buf);
 867                         REFRESH_TO_EOL();
 868                         continue;
 869                 }
 870 #ifdef CONFIG_AUTO_COMPLETE
 871                 case '\t': {
 872                         int num2, col;
 873
 874                         /* do not autocomplete when in the middle */
 875                         if (num < eol_num) {
 876                                 getcmd_cbeep();
 877                                 break;
 878                         }
 879
 880                         buf[num] = '\0';
 881                         col = strlen(prompt) + eol_num;
 882                         num2 = num;
 883                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 884                                 col = num2 - num;
 885                                 num += col;
 886                                 eol_num += col;
 887                         }
 888                         break;
 889                 }
 890 #endif
 891                 default:
 892                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 893                         break;
 894                 }
 895         }
 896         *len = eol_num;
 897         buf[eol_num] = '\0';    /* lose the newline */
 898
 899         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 900                 cread_add_to_hist(buf);
 901         hist_cur = hist_add_idx;
 902
 903         return (rc);
 904 }
 905
 906 #endif /* CONFIG_CMDLINE_EDITING */
 907
 908 /****************************************************************************/
 909
 910 /*
 911  * Prompt for input and read a line.
 912  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 913  * time out when time goes past endtime (timebase time in ticks).
 914  * Return:      number of read characters
 915  *              -1 if break
 916  *              -2 if timed out
 917  */
 918 int readline (const char *const prompt)
 919 {
 920         return readline_into_buffer(prompt, console_buffer);
 921 }
 922
 923
 924 int readline_into_buffer (const char *const prompt, char * buffer)
 925 {
 926         char *p = buffer;
 927 #ifdef CONFIG_CMDLINE_EDITING
 928         unsigned int len=MAX_CMDBUF_SIZE;
 929         int rc;
 930         static int initted = 0;
 931
 932         if (!initted) {
 933                 hist_init();
 934                 initted = 1;
 935         }
 936
 937         puts (prompt);
 938
 939         rc = cread_line(prompt, p, &len);
 940         return rc < 0 ? rc : len;
 941 #else
 942         char * p_buf = p;
 943         int     n = 0;                          /* buffer index         */
 944         int     plen = 0;                       /* prompt length        */
 945         int     col;                            /* output column cnt    */
 946         char    c;
 947
 948         /* print prompt */
 949         if (prompt) {
 950                 plen = strlen (prompt);
 951                 puts (prompt);
 952         }
 953         col = plen;
 954
 955         for (;;) {
 956 #ifdef CONFIG_BOOT_RETRY_TIME
 957                 while (!tstc()) {       /* while no incoming data */
 958                         if (retry_time >= 0 && get_ticks() > endtime)
 959                                 return (-2);    /* timed out */
 960                 }
 961 #endif
 962                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 963
 964 #ifdef CONFIG_SHOW_ACTIVITY
 965                 while (!tstc()) {
 966                         extern void show_activity(int arg);
 967                         show_activity(0);
 968                 }
 969 #endif
 970                 c = getc();
 971
 972                 /*
 973                  * Special character handling
 974                  */
 975                 switch (c) {
 976                 case '\r':                              /* Enter                */
 977                 case '\n':
 978                         *p = '\0';
 979                         puts ("\r\n");
 980                         return (p - p_buf);
 981
 982                 case '\0':                              /* nul                  */
 983                         continue;
 984
 985                 case 0x03:                              /* ^C - break           */
 986                         p_buf[0] = '\0';        /* discard input */
 987                         return (-1);
 988
 989                 case 0x15:                              /* ^U - erase line      */
 990                         while (col > plen) {
 991                                 puts (erase_seq);
 992                                 --col;
 993                         }
 994                         p = p_buf;
 995                         n = 0;
 996                         continue;
 997
 998                 case 0x17:                              /* ^W - erase word      */
 999                         p=delete_char(p_buf, p, &col, &n, plen);
1000                         while ((n > 0) && (*p != ' ')) {
1001                                 p=delete_char(p_buf, p, &col, &n, plen);
1002                         }
1003                         continue;
1004
1005                 case 0x08:                              /* ^H  - backspace      */
1006                 case 0x7F:                              /* DEL - backspace      */
1007                         p=delete_char(p_buf, p, &col, &n, plen);
1008                         continue;
1009
1010                 default:
1011                         /*
1012                          * Must be a normal character then
1013                          */
1014                         if (n < CFG_CBSIZE-2) {
1015                                 if (c == '\t') {        /* expand TABs          */
1016 #ifdef CONFIG_AUTO_COMPLETE
1017                                         /* if auto completion triggered just continue */
1018                                         *p = '\0';
1019                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1020                                                 p = p_buf + n;  /* reset */
1021                                                 continue;
1022                                         }
1023 #endif
1024                                         puts (tab_seq+(col&07));
1025                                         col += 8 - (col&07);
1026                                 } else {
1027                                         ++col;          /* echo input           */
1028                                         putc (c);
1029                                 }
1030                                 *p++ = c;
1031                                 ++n;
1032                         } else {                        /* Buffer full          */
1033                                 putc ('\a');
1034                         }
1035                 }
1036         }
1037 #endif /* CONFIG_CMDLINE_EDITING */
1038 }
1039
1040 /****************************************************************************/
1041
1042 #ifndef CONFIG_CMDLINE_EDITING
1043 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1044 {
1045         char *s;
1046
1047         if (*np == 0) {
1048                 return (p);
1049         }
1050
1051         if (*(--p) == '\t') {                   /* will retype the whole line   */
1052                 while (*colp > plen) {
1053                         puts (erase_seq);
1054                         (*colp)--;
1055                 }
1056                 for (s=buffer; s<p; ++s) {
1057                         if (*s == '\t') {
1058                                 puts (tab_seq+((*colp) & 07));
1059                                 *colp += 8 - ((*colp) & 07);
1060                         } else {
1061                                 ++(*colp);
1062                                 putc (*s);
1063                         }
1064                 }
1065         } else {
1066                 puts (erase_seq);
1067                 (*colp)--;
1068         }
1069         (*np)--;
1070         return (p);
1071 }
1072 #endif /* CONFIG_CMDLINE_EDITING */
1073
1074 /****************************************************************************/
1075
1076 int parse_line (char *line, char *argv[])
1077 {
1078         int nargs = 0;
1079
1080 #ifdef DEBUG_PARSER
1081         printf ("parse_line: \"%s\"\n", line);
1082 #endif
1083         while (nargs < CFG_MAXARGS) {
1084
1085                 /* skip any white space */
1086                 while ((*line == ' ') || (*line == '\t')) {
1087                         ++line;
1088                 }
1089
1090                 if (*line == '\0') {    /* end of line, no more args    */
1091                         argv[nargs] = NULL;
1092 #ifdef DEBUG_PARSER
1093                 printf ("parse_line: nargs=%d\n", nargs);
1094 #endif
1095                         return (nargs);
1096                 }
1097
1098                 argv[nargs++] = line;   /* begin of argument string     */
1099
1100                 /* find end of string */
1101                 while (*line && (*line != ' ') && (*line != '\t')) {
1102                         ++line;
1103                 }
1104
1105                 if (*line == '\0') {    /* end of line, no more args    */
1106                         argv[nargs] = NULL;
1107 #ifdef DEBUG_PARSER
1108                 printf ("parse_line: nargs=%d\n", nargs);
1109 #endif
1110                         return (nargs);
1111                 }
1112
1113                 *line++ = '\0';         /* terminate current arg         */
1114         }
1115
1116         printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
1117
1118 #ifdef DEBUG_PARSER
1119         printf ("parse_line: nargs=%d\n", nargs);
1120 #endif
1121         return (nargs);
1122 }
1123
1124 /****************************************************************************/
1125
1126 static void process_macros (const char *input, char *output)
1127 {
1128         char c, prev;
1129         const char *varname_start = NULL;
1130         int inputcnt = strlen (input);
1131         int outputcnt = CFG_CBSIZE;
1132         int state = 0;          /* 0 = waiting for '$'  */
1133
1134         /* 1 = waiting for '(' or '{' */
1135         /* 2 = waiting for ')' or '}' */
1136         /* 3 = waiting for '''  */
1137 #ifdef DEBUG_PARSER
1138         char *output_start = output;
1139
1140         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1141                 input);
1142 #endif
1143
1144         prev = '\0';            /* previous character   */
1145
1146         while (inputcnt && outputcnt) {
1147                 c = *input++;
1148                 inputcnt--;
1149
1150                 if (state != 3) {
1151                         /* remove one level of escape characters */
1152                         if ((c == '\\') && (prev != '\\')) {
1153                                 if (inputcnt-- == 0)
1154                                         break;
1155                                 prev = c;
1156                                 c = *input++;
1157                         }
1158                 }
1159
1160                 switch (state) {
1161                 case 0: /* Waiting for (unescaped) $    */
1162                         if ((c == '\'') && (prev != '\\')) {
1163                                 state = 3;
1164                                 break;
1165                         }
1166                         if ((c == '$') && (prev != '\\')) {
1167                                 state++;
1168                         } else {
1169                                 *(output++) = c;
1170                                 outputcnt--;
1171                         }
1172                         break;
1173                 case 1: /* Waiting for (        */
1174                         if (c == '(' || c == '{') {
1175                                 state++;
1176                                 varname_start = input;
1177                         } else {
1178                                 state = 0;
1179                                 *(output++) = '$';
1180                                 outputcnt--;
1181
1182                                 if (outputcnt) {
1183                                         *(output++) = c;
1184                                         outputcnt--;
1185                                 }
1186                         }
1187                         break;
1188                 case 2: /* Waiting for )        */
1189                         if (c == ')' || c == '}') {
1190                                 int i;
1191                                 char envname[CFG_CBSIZE], *envval;
1192                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1193
1194                                 /* Get the varname */
1195                                 for (i = 0; i < envcnt; i++) {
1196                                         envname[i] = varname_start[i];
1197                                 }
1198                                 envname[i] = 0;
1199
1200                                 /* Get its value */
1201                                 envval = getenv (envname);
1202
1203                                 /* Copy into the line if it exists */
1204                                 if (envval != NULL)
1205                                         while ((*envval) && outputcnt) {
1206                                                 *(output++) = *(envval++);
1207                                                 outputcnt--;
1208                                         }
1209                                 /* Look for another '$' */
1210                                 state = 0;
1211                         }
1212                         break;
1213                 case 3: /* Waiting for '        */
1214                         if ((c == '\'') && (prev != '\\')) {
1215                                 state = 0;
1216                         } else {
1217                                 *(output++) = c;
1218                                 outputcnt--;
1219                         }
1220                         break;
1221                 }
1222                 prev = c;
1223         }
1224
1225         if (outputcnt)
1226                 *output = 0;
1227         else
1228                 *(output - 1) = 0;
1229
1230 #ifdef DEBUG_PARSER
1231         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1232                 strlen (output_start), output_start);
1233 #endif
1234 }
1235
1236 /****************************************************************************
1237  * returns:
1238  *      1  - command executed, repeatable
1239  *      0  - command executed but not repeatable, interrupted commands are
1240  *           always considered not repeatable
1241  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1242  *           (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
1243  *           considered unrecognized)
1244  *
1245  * WARNING:
1246  *
1247  * We must create a temporary copy of the command since the command we get
1248  * may be the result from getenv(), which returns a pointer directly to
1249  * the environment data, which may change magicly when the command we run
1250  * creates or modifies environment variables (like "bootp" does).
1251  */
1252
1253 int run_command (const char *cmd, int flag)
1254 {
1255         cmd_tbl_t *cmdtp;
1256         char cmdbuf[CFG_CBSIZE];        /* working copy of cmd          */
1257         char *token;                    /* start of token in cmdbuf     */
1258         char *sep;                      /* end of token (separator) in cmdbuf */
1259         char finaltoken[CFG_CBSIZE];
1260         char *str = cmdbuf;
1261         char *argv[CFG_MAXARGS + 1];    /* NULL terminated      */
1262         int argc, inquotes;
1263         int repeatable = 1;
1264         int rc = 0;
1265
1266 #ifdef DEBUG_PARSER
1267         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1268         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1269         puts ("\"\n");
1270 #endif
1271
1272         clear_ctrlc();          /* forget any previous Control C */
1273
1274         if (!cmd || !*cmd) {
1275                 return -1;      /* empty command */
1276         }
1277
1278         if (strlen(cmd) >= CFG_CBSIZE) {
1279                 puts ("## Command too long!\n");
1280                 return -1;
1281         }
1282
1283         strcpy (cmdbuf, cmd);
1284
1285         /* Process separators and check for invalid
1286          * repeatable commands
1287          */
1288
1289 #ifdef DEBUG_PARSER
1290         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1291 #endif
1292         while (*str) {
1293
1294                 /*
1295                  * Find separator, or string end
1296                  * Allow simple escape of ';' by writing "\;"
1297                  */
1298                 for (inquotes = 0, sep = str; *sep; sep++) {
1299                         if ((*sep=='\'') &&
1300                             (*(sep-1) != '\\'))
1301                                 inquotes=!inquotes;
1302
1303                         if (!inquotes &&
1304                             (*sep == ';') &&    /* separator            */
1305                             ( sep != str) &&    /* past string start    */
1306                             (*(sep-1) != '\\')) /* and NOT escaped      */
1307                                 break;
1308                 }
1309
1310                 /*
1311                  * Limit the token to data between separators
1312                  */
1313                 token = str;
1314                 if (*sep) {
1315                         str = sep + 1;  /* start of command for next pass */
1316                         *sep = '\0';
1317                 }
1318                 else
1319                         str = sep;      /* no more commands for next pass */
1320 #ifdef DEBUG_PARSER
1321                 printf ("token: \"%s\"\n", token);
1322 #endif
1323
1324                 /* find macros in this token and replace them */
1325                 process_macros (token, finaltoken);
1326
1327                 /* Extract arguments */
1328                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1329                         rc = -1;        /* no command at all */
1330                         continue;
1331                 }
1332
1333                 /* Look up command in command table */
1334                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1335                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1336                         rc = -1;        /* give up after bad command */
1337                         continue;
1338                 }
1339
1340                 /* found - check max args */
1341                 if (argc > cmdtp->maxargs) {
1342                         printf ("Usage:\n%s\n", cmdtp->usage);
1343                         rc = -1;
1344                         continue;
1345                 }
1346
1347 #if defined(CONFIG_CMD_BOOTD)
1348                 /* avoid "bootd" recursion */
1349                 if (cmdtp->cmd == do_bootd) {
1350 #ifdef DEBUG_PARSER
1351                         printf ("[%s]\n", finaltoken);
1352 #endif
1353                         if (flag & CMD_FLAG_BOOTD) {
1354                                 puts ("'bootd' recursion detected\n");
1355                                 rc = -1;
1356                                 continue;
1357                         } else {
1358                                 flag |= CMD_FLAG_BOOTD;
1359                         }
1360                 }
1361 #endif
1362
1363                 /* OK - call function to do the command */
1364                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1365                         rc = -1;
1366                 }
1367
1368                 repeatable &= cmdtp->repeatable;
1369
1370                 /* Did the user stop this? */
1371                 if (had_ctrlc ())
1372                         return -1;      /* if stopped then not repeatable */
1373         }
1374
1375         return rc ? rc : repeatable;
1376 }
1377
1378 /****************************************************************************/
1379
1380 #if defined(CONFIG_CMD_RUN)
1381 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1382 {
1383         int i;
1384
1385         if (argc < 2) {
1386                 printf ("Usage:\n%s\n", cmdtp->usage);
1387                 return 1;
1388         }
1389
1390         for (i=1; i<argc; ++i) {
1391                 char *arg;
1392
1393                 if ((arg = getenv (argv[i])) == NULL) {
1394                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1395                         return 1;
1396                 }
1397 #ifndef CFG_HUSH_PARSER
1398                 if (run_command (arg, flag) == -1)
1399                         return 1;
1400 #else
1401                 if (parse_string_outer(arg,
1402                     FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1403                         return 1;
1404 #endif
1405         }
1406         return 0;
1407 }
1408 #endif