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