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
  45 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
  46 DECLARE_GLOBAL_DATA_PTR;
  47 #endif
  48
  49 /*
  50  * Board-specific Platform code can reimplement show_boot_progress () if needed
  51  */
  52 void inline __show_boot_progress (int val) {}
  53 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  54
  55 #if defined(CONFIG_UPDATE_TFTP)
  56 int update_tftp (ulong addr);
  57 #endif /* CONFIG_UPDATE_TFTP */
  58
  59 #define MAX_DELAY_STOP_STR 32
  60
  61 #undef DEBUG_PARSER
  62
  63 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
  64
  65 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
  66 static const char erase_seq[] = "\b \b";                /* erase sequence       */
  67 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
  68
  69 #ifdef CONFIG_BOOT_RETRY_TIME
  70 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
  71 static int      retry_time = -1; /* -1 so can call readline before main_loop */
  72 #endif
  73
  74 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
  75
  76 #ifndef CONFIG_BOOT_RETRY_MIN
  77 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
  78 #endif
  79
  80 #ifdef CONFIG_MODEM_SUPPORT
  81 int do_mdm_init = 0;
  82 extern void mdm_init(void); /* defined in board.c */
  83 #endif
  84
  85 /***************************************************************************
  86  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  87  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  88  */
  89 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  90 # if defined(CONFIG_AUTOBOOT_KEYED)
  91 #ifndef CONFIG_MENU
  92 static inline
  93 #endif
  94 int abortboot(int bootdelay)
  95 {
  96         int abort = 0;
  97         uint64_t etime = endtick(bootdelay);
  98         struct {
  99                 char* str;
 100                 u_int len;
 101                 int retry;
 102         }
 103         delaykey [] = {
 104                 { str: getenv ("bootdelaykey"),  retry: 1 },
 105                 { str: getenv ("bootdelaykey2"), retry: 1 },
 106                 { str: getenv ("bootstopkey"),   retry: 0 },
 107                 { str: getenv ("bootstopkey2"),  retry: 0 },
 108         };
 109
 110         char presskey [MAX_DELAY_STOP_STR];
 111         u_int presskey_len = 0;
 112         u_int presskey_max = 0;
 113         u_int i;
 114
 115 #  ifdef CONFIG_AUTOBOOT_PROMPT
 116         printf(CONFIG_AUTOBOOT_PROMPT);
 117 #  endif
 118
 119 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
 120         if (delaykey[0].str == NULL)
 121                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
 122 #  endif
 123 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
 124         if (delaykey[1].str == NULL)
 125                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
 126 #  endif
 127 #  ifdef CONFIG_AUTOBOOT_STOP_STR
 128         if (delaykey[2].str == NULL)
 129                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
 130 #  endif
 131 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
 132         if (delaykey[3].str == NULL)
 133                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
 134 #  endif
 135
 136         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 137                 delaykey[i].len = delaykey[i].str == NULL ?
 138                                     0 : strlen (delaykey[i].str);
 139                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
 140                                     MAX_DELAY_STOP_STR : delaykey[i].len;
 141
 142                 presskey_max = presskey_max > delaykey[i].len ?
 143                                     presskey_max : delaykey[i].len;
 144
 145 #  if DEBUG_BOOTKEYS
 146                 printf("%s key:<%s>\n",
 147                        delaykey[i].retry ? "delay" : "stop",
 148                        delaykey[i].str ? delaykey[i].str : "NULL");
 149 #  endif
 150         }
 151
 152         /* In order to keep up with incoming data, check timeout only
 153          * when catch up.
 154          */
 155         do {
 156                 if (tstc()) {
 157                         if (presskey_len < presskey_max) {
 158                                 presskey [presskey_len ++] = getc();
 159                         }
 160                         else {
 161                                 for (i = 0; i < presskey_max - 1; i ++)
 162                                         presskey [i] = presskey [i + 1];
 163
 164                                 presskey [i] = getc();
 165                         }
 166                 }
 167
 168                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
 169                         if (delaykey[i].len > 0 &&
 170                             presskey_len >= delaykey[i].len &&
 171                             memcmp (presskey + presskey_len - delaykey[i].len,
 172                                     delaykey[i].str,
 173                                     delaykey[i].len) == 0) {
 174 #  if DEBUG_BOOTKEYS
 175                                 printf("got %skey\n",
 176                                        delaykey[i].retry ? "delay" : "stop");
 177 #  endif
 178
 179 #  ifdef CONFIG_BOOT_RETRY_TIME
 180                                 /* don't retry auto boot */
 181                                 if (! delaykey[i].retry)
 182                                         retry_time = -1;
 183 #  endif
 184                                 abort = 1;
 185                         }
 186                 }
 187         } while (!abort && get_ticks() <= etime);
 188
 189 #  if DEBUG_BOOTKEYS
 190         if (!abort)
 191                 puts("key timeout\n");
 192 #  endif
 193
 194 #ifdef CONFIG_SILENT_CONSOLE
 195         if (abort)
 196                 gd->flags &= ~GD_FLG_SILENT;
 197 #endif
 198
 199         return abort;
 200 }
 201
 202 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 203
 204 #ifdef CONFIG_MENUKEY
 205 static int menukey = 0;
 206 #endif
 207
 208 #ifndef CONFIG_MENU
 209 static inline
 210 #endif
 211 int abortboot(int bootdelay)
 212 {
 213         int abort = 0;
 214
 215 #ifdef CONFIG_MENUPROMPT
 216         printf(CONFIG_MENUPROMPT);
 217 #else
 218         printf("Hit any key to stop autoboot: %2d ", bootdelay);
 219 #endif
 220
 221 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 222         /*
 223          * Check if key already pressed
 224          * Don't check if bootdelay < 0
 225          */
 226         if (bootdelay >= 0) {
 227                 if (tstc()) {   /* we got a key press   */
 228                         (void) getc();  /* consume input        */
 229                         puts ("\b\b\b 0");
 230                         abort = 1;      /* don't auto boot      */
 231                 }
 232         }
 233 #endif
 234
 235         while ((bootdelay > 0) && (!abort)) {
 236                 int i;
 237
 238                 --bootdelay;
 239                 /* delay 100 * 10ms */
 240                 for (i=0; !abort && i<100; ++i) {
 241                         if (tstc()) {   /* we got a key press   */
 242                                 abort  = 1;     /* don't auto boot      */
 243                                 bootdelay = 0;  /* no more delay        */
 244 # ifdef CONFIG_MENUKEY
 245                                 menukey = getc();
 246 # else
 247                                 (void) getc();  /* consume input        */
 248 # endif
 249                                 break;
 250                         }
 251                         udelay(10000);
 252                 }
 253
 254                 printf("\b\b\b%2d ", bootdelay);
 255         }
 256
 257         putc('\n');
 258
 259 #ifdef CONFIG_SILENT_CONSOLE
 260         if (abort)
 261                 gd->flags &= ~GD_FLG_SILENT;
 262 #endif
 263
 264         return abort;
 265 }
 266 # endif /* CONFIG_AUTOBOOT_KEYED */
 267 #endif  /* CONFIG_BOOTDELAY >= 0  */
 268
 269 /*
 270  * Return 0 on success, or != 0 on error.
 271  */
 272 static inline
 273 int run_command2(const char *cmd, int flag)
 274 {
 275 #ifndef CONFIG_SYS_HUSH_PARSER
 276         /*
 277          * run_command can return 0 or 1 for success, so clean up its result.
 278          */
 279         if (run_command(cmd, flag) == -1)
 280                 return 1;
 281
 282         return 0;
 283 #else
 284         return parse_string_outer(cmd,
 285                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
 286 #endif
 287 }
 288
 289 /****************************************************************************/
 290
 291 void main_loop (void)
 292 {
 293 #ifndef CONFIG_SYS_HUSH_PARSER
 294         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
 295         int len;
 296         int rc = 1;
 297         int flag;
 298 #endif
 299
 300 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 301         char *s;
 302         int bootdelay;
 303 #endif
 304 #ifdef CONFIG_PREBOOT
 305         char *p;
 306 #endif
 307 #ifdef CONFIG_BOOTCOUNT_LIMIT
 308         unsigned long bootcount = 0;
 309         unsigned long bootlimit = 0;
 310         char *bcs;
 311         char bcs_set[16];
 312 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 313
 314 #ifdef CONFIG_BOOTCOUNT_LIMIT
 315         bootcount = bootcount_load();
 316         bootcount++;
 317         bootcount_store (bootcount);
 318         sprintf (bcs_set, "%lu", bootcount);
 319         setenv ("bootcount", bcs_set);
 320         bcs = getenv ("bootlimit");
 321         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
 322 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 323
 324 #ifdef CONFIG_MODEM_SUPPORT
 325         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
 326         if (do_mdm_init) {
 327                 char *str = strdup(getenv("mdm_cmd"));
 328                 setenv ("preboot", str);  /* set or delete definition */
 329                 if (str != NULL)
 330                         free (str);
 331                 mdm_init(); /* wait for modem connection */
 332         }
 333 #endif  /* CONFIG_MODEM_SUPPORT */
 334
 335 #ifdef CONFIG_VERSION_VARIABLE
 336         {
 337                 setenv ("ver", version_string);  /* set version variable */
 338         }
 339 #endif /* CONFIG_VERSION_VARIABLE */
 340
 341 #ifdef CONFIG_SYS_HUSH_PARSER
 342         u_boot_hush_start ();
 343 #endif
 344
 345 #if defined(CONFIG_HUSH_INIT_VAR)
 346         hush_init_var ();
 347 #endif
 348
 349 #ifdef CONFIG_PREBOOT
 350         if ((p = getenv ("preboot")) != NULL) {
 351 # ifdef CONFIG_AUTOBOOT_KEYED
 352                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 353 # endif
 354
 355                 run_command2(p, 0);
 356
 357 # ifdef CONFIG_AUTOBOOT_KEYED
 358                 disable_ctrlc(prev);    /* restore Control C checking */
 359 # endif
 360         }
 361 #endif /* CONFIG_PREBOOT */
 362
 363 #if defined(CONFIG_UPDATE_TFTP)
 364         update_tftp (0UL);
 365 #endif /* CONFIG_UPDATE_TFTP */
 366
 367 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 368         s = getenv ("bootdelay");
 369         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 370
 371         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 372
 373 # ifdef CONFIG_BOOT_RETRY_TIME
 374         init_cmd_timeout ();
 375 # endif /* CONFIG_BOOT_RETRY_TIME */
 376
 377 #ifdef CONFIG_POST
 378         if (gd->flags & GD_FLG_POSTFAIL) {
 379                 s = getenv("failbootcmd");
 380         }
 381         else
 382 #endif /* CONFIG_POST */
 383 #ifdef CONFIG_BOOTCOUNT_LIMIT
 384         if (bootlimit && (bootcount > bootlimit)) {
 385                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 386                         (unsigned)bootlimit);
 387                 s = getenv ("altbootcmd");
 388         }
 389         else
 390 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 391                 s = getenv ("bootcmd");
 392
 393         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 394
 395         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
 396 # ifdef CONFIG_AUTOBOOT_KEYED
 397                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 398 # endif
 399
 400                 run_command2(s, 0);
 401
 402 # ifdef CONFIG_AUTOBOOT_KEYED
 403                 disable_ctrlc(prev);    /* restore Control C checking */
 404 # endif
 405         }
 406
 407 # ifdef CONFIG_MENUKEY
 408         if (menukey == CONFIG_MENUKEY) {
 409                 s = getenv("menucmd");
 410                 if (s)
 411                         run_command2(s, 0);
 412         }
 413 #endif /* CONFIG_MENUKEY */
 414 #endif /* CONFIG_BOOTDELAY */
 415
 416         /*
 417          * Main Loop for Monitor Command Processing
 418          */
 419 #ifdef CONFIG_SYS_HUSH_PARSER
 420         parse_file_outer();
 421         /* This point is never reached */
 422         for (;;);
 423 #else
 424         for (;;) {
 425 #ifdef CONFIG_BOOT_RETRY_TIME
 426                 if (rc >= 0) {
 427                         /* Saw enough of a valid command to
 428                          * restart the timeout.
 429                          */
 430                         reset_cmd_timeout();
 431                 }
 432 #endif
 433                 len = readline (CONFIG_SYS_PROMPT);
 434
 435                 flag = 0;       /* assume no special flags for now */
 436                 if (len > 0)
 437                         strcpy (lastcommand, console_buffer);
 438                 else if (len == 0)
 439                         flag |= CMD_FLAG_REPEAT;
 440 #ifdef CONFIG_BOOT_RETRY_TIME
 441                 else if (len == -2) {
 442                         /* -2 means timed out, retry autoboot
 443                          */
 444                         puts ("\nTimed out waiting for command\n");
 445 # ifdef CONFIG_RESET_TO_RETRY
 446                         /* Reinit board to run initialization code again */
 447                         do_reset (NULL, 0, 0, NULL);
 448 # else
 449                         return;         /* retry autoboot */
 450 # endif
 451                 }
 452 #endif
 453
 454                 if (len == -1)
 455                         puts ("<INTERRUPT>\n");
 456                 else
 457                         rc = run_command (lastcommand, flag);
 458
 459                 if (rc <= 0) {
 460                         /* invalid command or not repeatable, forget it */
 461                         lastcommand[0] = 0;
 462                 }
 463         }
 464 #endif /*CONFIG_SYS_HUSH_PARSER*/
 465 }
 466
 467 #ifdef CONFIG_BOOT_RETRY_TIME
 468 /***************************************************************************
 469  * initialize command line timeout
 470  */
 471 void init_cmd_timeout(void)
 472 {
 473         char *s = getenv ("bootretry");
 474
 475         if (s != NULL)
 476                 retry_time = (int)simple_strtol(s, NULL, 10);
 477         else
 478                 retry_time =  CONFIG_BOOT_RETRY_TIME;
 479
 480         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
 481                 retry_time = CONFIG_BOOT_RETRY_MIN;
 482 }
 483
 484 /***************************************************************************
 485  * reset command line timeout to retry_time seconds
 486  */
 487 void reset_cmd_timeout(void)
 488 {
 489         endtime = endtick(retry_time);
 490 }
 491 #endif
 492
 493 #ifdef CONFIG_CMDLINE_EDITING
 494
 495 /*
 496  * cmdline-editing related codes from vivi.
 497  * Author: Janghoon Lyu <nandy@mizi.com>
 498  */
 499
 500 #define putnstr(str,n)  do {                    \
 501                 printf ("%.*s", (int)n, str);   \
 502         } while (0)
 503
 504 #define CTL_CH(c)               ((c) - 'a' + 1)
 505 #define CTL_BACKSPACE           ('\b')
 506 #define DEL                     ((char)255)
 507 #define DEL7                    ((char)127)
 508 #define CREAD_HIST_CHAR         ('!')
 509
 510 #define getcmd_putch(ch)        putc(ch)
 511 #define getcmd_getch()          getc()
 512 #define getcmd_cbeep()          getcmd_putch('\a')
 513
 514 #define HIST_MAX                20
 515 #define HIST_SIZE               CONFIG_SYS_CBSIZE
 516
 517 static int hist_max = 0;
 518 static int hist_add_idx = 0;
 519 static int hist_cur = -1;
 520 unsigned hist_num = 0;
 521
 522 char* hist_list[HIST_MAX];
 523 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
 524
 525 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
 526
 527 static void hist_init(void)
 528 {
 529         int i;
 530
 531         hist_max = 0;
 532         hist_add_idx = 0;
 533         hist_cur = -1;
 534         hist_num = 0;
 535
 536         for (i = 0; i < HIST_MAX; i++) {
 537                 hist_list[i] = hist_lines[i];
 538                 hist_list[i][0] = '\0';
 539         }
 540 }
 541
 542 static void cread_add_to_hist(char *line)
 543 {
 544         strcpy(hist_list[hist_add_idx], line);
 545
 546         if (++hist_add_idx >= HIST_MAX)
 547                 hist_add_idx = 0;
 548
 549         if (hist_add_idx > hist_max)
 550                 hist_max = hist_add_idx;
 551
 552         hist_num++;
 553 }
 554
 555 static char* hist_prev(void)
 556 {
 557         char *ret;
 558         int old_cur;
 559
 560         if (hist_cur < 0)
 561                 return NULL;
 562
 563         old_cur = hist_cur;
 564         if (--hist_cur < 0)
 565                 hist_cur = hist_max;
 566
 567         if (hist_cur == hist_add_idx) {
 568                 hist_cur = old_cur;
 569                 ret = NULL;
 570         } else
 571                 ret = hist_list[hist_cur];
 572
 573         return (ret);
 574 }
 575
 576 static char* hist_next(void)
 577 {
 578         char *ret;
 579
 580         if (hist_cur < 0)
 581                 return NULL;
 582
 583         if (hist_cur == hist_add_idx)
 584                 return NULL;
 585
 586         if (++hist_cur > hist_max)
 587                 hist_cur = 0;
 588
 589         if (hist_cur == hist_add_idx) {
 590                 ret = "";
 591         } else
 592                 ret = hist_list[hist_cur];
 593
 594         return (ret);
 595 }
 596
 597 #ifndef CONFIG_CMDLINE_EDITING
 598 static void cread_print_hist_list(void)
 599 {
 600         int i;
 601         unsigned long n;
 602
 603         n = hist_num - hist_max;
 604
 605         i = hist_add_idx + 1;
 606         while (1) {
 607                 if (i > hist_max)
 608                         i = 0;
 609                 if (i == hist_add_idx)
 610                         break;
 611                 printf("%s\n", hist_list[i]);
 612                 n++;
 613                 i++;
 614         }
 615 }
 616 #endif /* CONFIG_CMDLINE_EDITING */
 617
 618 #define BEGINNING_OF_LINE() {                   \
 619         while (num) {                           \
 620                 getcmd_putch(CTL_BACKSPACE);    \
 621                 num--;                          \
 622         }                                       \
 623 }
 624
 625 #define ERASE_TO_EOL() {                                \
 626         if (num < eol_num) {                            \
 627                 printf("%*s", (int)(eol_num - num), ""); \
 628                 do {                                    \
 629                         getcmd_putch(CTL_BACKSPACE);    \
 630                 } while (--eol_num > num);              \
 631         }                                               \
 632 }
 633
 634 #define REFRESH_TO_EOL() {                      \
 635         if (num < eol_num) {                    \
 636                 wlen = eol_num - num;           \
 637                 putnstr(buf + num, wlen);       \
 638                 num = eol_num;                  \
 639         }                                       \
 640 }
 641
 642 static void cread_add_char(char ichar, int insert, unsigned long *num,
 643                unsigned long *eol_num, char *buf, unsigned long len)
 644 {
 645         unsigned long wlen;
 646
 647         /* room ??? */
 648         if (insert || *num == *eol_num) {
 649                 if (*eol_num > len - 1) {
 650                         getcmd_cbeep();
 651                         return;
 652                 }
 653                 (*eol_num)++;
 654         }
 655
 656         if (insert) {
 657                 wlen = *eol_num - *num;
 658                 if (wlen > 1) {
 659                         memmove(&buf[*num+1], &buf[*num], wlen-1);
 660                 }
 661
 662                 buf[*num] = ichar;
 663                 putnstr(buf + *num, wlen);
 664                 (*num)++;
 665                 while (--wlen) {
 666                         getcmd_putch(CTL_BACKSPACE);
 667                 }
 668         } else {
 669                 /* echo the character */
 670                 wlen = 1;
 671                 buf[*num] = ichar;
 672                 putnstr(buf + *num, wlen);
 673                 (*num)++;
 674         }
 675 }
 676
 677 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
 678               unsigned long *eol_num, char *buf, unsigned long len)
 679 {
 680         while (strsize--) {
 681                 cread_add_char(*str, insert, num, eol_num, buf, len);
 682                 str++;
 683         }
 684 }
 685
 686 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
 687 {
 688         unsigned long num = 0;
 689         unsigned long eol_num = 0;
 690         unsigned long wlen;
 691         char ichar;
 692         int insert = 1;
 693         int esc_len = 0;
 694         char esc_save[8];
 695         int init_len = strlen(buf);
 696
 697         if (init_len)
 698                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
 699
 700         while (1) {
 701 #ifdef CONFIG_BOOT_RETRY_TIME
 702                 while (!tstc()) {       /* while no incoming data */
 703                         if (retry_time >= 0 && get_ticks() > endtime)
 704                                 return (-2);    /* timed out */
 705                         WATCHDOG_RESET();
 706                 }
 707 #endif
 708
 709                 ichar = getcmd_getch();
 710
 711                 if ((ichar == '\n') || (ichar == '\r')) {
 712                         putc('\n');
 713                         break;
 714                 }
 715
 716                 /*
 717                  * handle standard linux xterm esc sequences for arrow key, etc.
 718                  */
 719                 if (esc_len != 0) {
 720                         if (esc_len == 1) {
 721                                 if (ichar == '[') {
 722                                         esc_save[esc_len] = ichar;
 723                                         esc_len = 2;
 724                                 } else {
 725                                         cread_add_str(esc_save, esc_len, insert,
 726                                                       &num, &eol_num, buf, *len);
 727                                         esc_len = 0;
 728                                 }
 729                                 continue;
 730                         }
 731
 732                         switch (ichar) {
 733
 734                         case 'D':       /* <- key */
 735                                 ichar = CTL_CH('b');
 736                                 esc_len = 0;
 737                                 break;
 738                         case 'C':       /* -> key */
 739                                 ichar = CTL_CH('f');
 740                                 esc_len = 0;
 741                                 break;  /* pass off to ^F handler */
 742                         case 'H':       /* Home key */
 743                                 ichar = CTL_CH('a');
 744                                 esc_len = 0;
 745                                 break;  /* pass off to ^A handler */
 746                         case 'A':       /* up arrow */
 747                                 ichar = CTL_CH('p');
 748                                 esc_len = 0;
 749                                 break;  /* pass off to ^P handler */
 750                         case 'B':       /* down arrow */
 751                                 ichar = CTL_CH('n');
 752                                 esc_len = 0;
 753                                 break;  /* pass off to ^N handler */
 754                         default:
 755                                 esc_save[esc_len++] = ichar;
 756                                 cread_add_str(esc_save, esc_len, insert,
 757                                               &num, &eol_num, buf, *len);
 758                                 esc_len = 0;
 759                                 continue;
 760                         }
 761                 }
 762
 763                 switch (ichar) {
 764                 case 0x1b:
 765                         if (esc_len == 0) {
 766                                 esc_save[esc_len] = ichar;
 767                                 esc_len = 1;
 768                         } else {
 769                                 puts("impossible condition #876\n");
 770                                 esc_len = 0;
 771                         }
 772                         break;
 773
 774                 case CTL_CH('a'):
 775                         BEGINNING_OF_LINE();
 776                         break;
 777                 case CTL_CH('c'):       /* ^C - break */
 778                         *buf = '\0';    /* discard input */
 779                         return (-1);
 780                 case CTL_CH('f'):
 781                         if (num < eol_num) {
 782                                 getcmd_putch(buf[num]);
 783                                 num++;
 784                         }
 785                         break;
 786                 case CTL_CH('b'):
 787                         if (num) {
 788                                 getcmd_putch(CTL_BACKSPACE);
 789                                 num--;
 790                         }
 791                         break;
 792                 case CTL_CH('d'):
 793                         if (num < eol_num) {
 794                                 wlen = eol_num - num - 1;
 795                                 if (wlen) {
 796                                         memmove(&buf[num], &buf[num+1], wlen);
 797                                         putnstr(buf + num, wlen);
 798                                 }
 799
 800                                 getcmd_putch(' ');
 801                                 do {
 802                                         getcmd_putch(CTL_BACKSPACE);
 803                                 } while (wlen--);
 804                                 eol_num--;
 805                         }
 806                         break;
 807                 case CTL_CH('k'):
 808                         ERASE_TO_EOL();
 809                         break;
 810                 case CTL_CH('e'):
 811                         REFRESH_TO_EOL();
 812                         break;
 813                 case CTL_CH('o'):
 814                         insert = !insert;
 815                         break;
 816                 case CTL_CH('x'):
 817                 case CTL_CH('u'):
 818                         BEGINNING_OF_LINE();
 819                         ERASE_TO_EOL();
 820                         break;
 821                 case DEL:
 822                 case DEL7:
 823                 case 8:
 824                         if (num) {
 825                                 wlen = eol_num - num;
 826                                 num--;
 827                                 memmove(&buf[num], &buf[num+1], wlen);
 828                                 getcmd_putch(CTL_BACKSPACE);
 829                                 putnstr(buf + num, wlen);
 830                                 getcmd_putch(' ');
 831                                 do {
 832                                         getcmd_putch(CTL_BACKSPACE);
 833                                 } while (wlen--);
 834                                 eol_num--;
 835                         }
 836                         break;
 837                 case CTL_CH('p'):
 838                 case CTL_CH('n'):
 839                 {
 840                         char * hline;
 841
 842                         esc_len = 0;
 843
 844                         if (ichar == CTL_CH('p'))
 845                                 hline = hist_prev();
 846                         else
 847                                 hline = hist_next();
 848
 849                         if (!hline) {
 850                                 getcmd_cbeep();
 851                                 continue;
 852                         }
 853
 854                         /* nuke the current line */
 855                         /* first, go home */
 856                         BEGINNING_OF_LINE();
 857
 858                         /* erase to end of line */
 859                         ERASE_TO_EOL();
 860
 861                         /* copy new line into place and display */
 862                         strcpy(buf, hline);
 863                         eol_num = strlen(buf);
 864                         REFRESH_TO_EOL();
 865                         continue;
 866                 }
 867 #ifdef CONFIG_AUTO_COMPLETE
 868                 case '\t': {
 869                         int num2, col;
 870
 871                         /* do not autocomplete when in the middle */
 872                         if (num < eol_num) {
 873                                 getcmd_cbeep();
 874                                 break;
 875                         }
 876
 877                         buf[num] = '\0';
 878                         col = strlen(prompt) + eol_num;
 879                         num2 = num;
 880                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
 881                                 col = num2 - num;
 882                                 num += col;
 883                                 eol_num += col;
 884                         }
 885                         break;
 886                 }
 887 #endif
 888                 default:
 889                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
 890                         break;
 891                 }
 892         }
 893         *len = eol_num;
 894         buf[eol_num] = '\0';    /* lose the newline */
 895
 896         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
 897                 cread_add_to_hist(buf);
 898         hist_cur = hist_add_idx;
 899
 900         return 0;
 901 }
 902
 903 #endif /* CONFIG_CMDLINE_EDITING */
 904
 905 /****************************************************************************/
 906
 907 /*
 908  * Prompt for input and read a line.
 909  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
 910  * time out when time goes past endtime (timebase time in ticks).
 911  * Return:      number of read characters
 912  *              -1 if break
 913  *              -2 if timed out
 914  */
 915 int readline (const char *const prompt)
 916 {
 917         /*
 918          * If console_buffer isn't 0-length the user will be prompted to modify
 919          * it instead of entering it from scratch as desired.
 920          */
 921         console_buffer[0] = '\0';
 922
 923         return readline_into_buffer(prompt, console_buffer);
 924 }
 925
 926
 927 int readline_into_buffer (const char *const prompt, char * buffer)
 928 {
 929         char *p = buffer;
 930 #ifdef CONFIG_CMDLINE_EDITING
 931         unsigned int len = CONFIG_SYS_CBSIZE;
 932         int rc;
 933         static int initted = 0;
 934
 935         /*
 936          * History uses a global array which is not
 937          * writable until after relocation to RAM.
 938          * Revert to non-history version if still
 939          * running from flash.
 940          */
 941         if (gd->flags & GD_FLG_RELOC) {
 942                 if (!initted) {
 943                         hist_init();
 944                         initted = 1;
 945                 }
 946
 947                 if (prompt)
 948                         puts (prompt);
 949
 950                 rc = cread_line(prompt, p, &len);
 951                 return rc < 0 ? rc : len;
 952
 953         } else {
 954 #endif  /* CONFIG_CMDLINE_EDITING */
 955         char * p_buf = p;
 956         int     n = 0;                          /* buffer index         */
 957         int     plen = 0;                       /* prompt length        */
 958         int     col;                            /* output column cnt    */
 959         char    c;
 960
 961         /* print prompt */
 962         if (prompt) {
 963                 plen = strlen (prompt);
 964                 puts (prompt);
 965         }
 966         col = plen;
 967
 968         for (;;) {
 969 #ifdef CONFIG_BOOT_RETRY_TIME
 970                 while (!tstc()) {       /* while no incoming data */
 971                         if (retry_time >= 0 && get_ticks() > endtime)
 972                                 return (-2);    /* timed out */
 973                         WATCHDOG_RESET();
 974                 }
 975 #endif
 976                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
 977
 978 #ifdef CONFIG_SHOW_ACTIVITY
 979                 while (!tstc()) {
 980                         extern void show_activity(int arg);
 981                         show_activity(0);
 982                         WATCHDOG_RESET();
 983                 }
 984 #endif
 985                 c = getc();
 986
 987                 /*
 988                  * Special character handling
 989                  */
 990                 switch (c) {
 991                 case '\r':                              /* Enter                */
 992                 case '\n':
 993                         *p = '\0';
 994                         puts ("\r\n");
 995                         return (p - p_buf);
 996
 997                 case '\0':                              /* nul                  */
 998                         continue;
 999
1000                 case 0x03:                              /* ^C - break           */
1001                         p_buf[0] = '\0';        /* discard input */
1002                         return (-1);
1003
1004                 case 0x15:                              /* ^U - erase line      */
1005                         while (col > plen) {
1006                                 puts (erase_seq);
1007                                 --col;
1008                         }
1009                         p = p_buf;
1010                         n = 0;
1011                         continue;
1012
1013                 case 0x17:                              /* ^W - erase word      */
1014                         p=delete_char(p_buf, p, &col, &n, plen);
1015                         while ((n > 0) && (*p != ' ')) {
1016                                 p=delete_char(p_buf, p, &col, &n, plen);
1017                         }
1018                         continue;
1019
1020                 case 0x08:                              /* ^H  - backspace      */
1021                 case 0x7F:                              /* DEL - backspace      */
1022                         p=delete_char(p_buf, p, &col, &n, plen);
1023                         continue;
1024
1025                 default:
1026                         /*
1027                          * Must be a normal character then
1028                          */
1029                         if (n < CONFIG_SYS_CBSIZE-2) {
1030                                 if (c == '\t') {        /* expand TABs          */
1031 #ifdef CONFIG_AUTO_COMPLETE
1032                                         /* if auto completion triggered just continue */
1033                                         *p = '\0';
1034                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1035                                                 p = p_buf + n;  /* reset */
1036                                                 continue;
1037                                         }
1038 #endif
1039                                         puts (tab_seq+(col&07));
1040                                         col += 8 - (col&07);
1041                                 } else {
1042                                         ++col;          /* echo input           */
1043                                         putc (c);
1044                                 }
1045                                 *p++ = c;
1046                                 ++n;
1047                         } else {                        /* Buffer full          */
1048                                 putc ('\a');
1049                         }
1050                 }
1051         }
1052 #ifdef CONFIG_CMDLINE_EDITING
1053         }
1054 #endif
1055 }
1056
1057 /****************************************************************************/
1058
1059 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1060 {
1061         char *s;
1062
1063         if (*np == 0) {
1064                 return (p);
1065         }
1066
1067         if (*(--p) == '\t') {                   /* will retype the whole line   */
1068                 while (*colp > plen) {
1069                         puts (erase_seq);
1070                         (*colp)--;
1071                 }
1072                 for (s=buffer; s<p; ++s) {
1073                         if (*s == '\t') {
1074                                 puts (tab_seq+((*colp) & 07));
1075                                 *colp += 8 - ((*colp) & 07);
1076                         } else {
1077                                 ++(*colp);
1078                                 putc (*s);
1079                         }
1080                 }
1081         } else {
1082                 puts (erase_seq);
1083                 (*colp)--;
1084         }
1085         (*np)--;
1086         return (p);
1087 }
1088
1089 /****************************************************************************/
1090
1091 int parse_line (char *line, char *argv[])
1092 {
1093         int nargs = 0;
1094
1095 #ifdef DEBUG_PARSER
1096         printf ("parse_line: \"%s\"\n", line);
1097 #endif
1098         while (nargs < CONFIG_SYS_MAXARGS) {
1099
1100                 /* skip any white space */
1101                 while (isblank(*line))
1102                         ++line;
1103
1104                 if (*line == '\0') {    /* end of line, no more args    */
1105                         argv[nargs] = NULL;
1106 #ifdef DEBUG_PARSER
1107                 printf ("parse_line: nargs=%d\n", nargs);
1108 #endif
1109                         return (nargs);
1110                 }
1111
1112                 argv[nargs++] = line;   /* begin of argument string     */
1113
1114                 /* find end of string */
1115                 while (*line && !isblank(*line))
1116                         ++line;
1117
1118                 if (*line == '\0') {    /* end of line, no more args    */
1119                         argv[nargs] = NULL;
1120 #ifdef DEBUG_PARSER
1121                 printf ("parse_line: nargs=%d\n", nargs);
1122 #endif
1123                         return (nargs);
1124                 }
1125
1126                 *line++ = '\0';         /* terminate current arg         */
1127         }
1128
1129         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1130
1131 #ifdef DEBUG_PARSER
1132         printf ("parse_line: nargs=%d\n", nargs);
1133 #endif
1134         return (nargs);
1135 }
1136
1137 /****************************************************************************/
1138
1139 static void process_macros (const char *input, char *output)
1140 {
1141         char c, prev;
1142         const char *varname_start = NULL;
1143         int inputcnt = strlen (input);
1144         int outputcnt = CONFIG_SYS_CBSIZE;
1145         int state = 0;          /* 0 = waiting for '$'  */
1146
1147         /* 1 = waiting for '(' or '{' */
1148         /* 2 = waiting for ')' or '}' */
1149         /* 3 = waiting for '''  */
1150 #ifdef DEBUG_PARSER
1151         char *output_start = output;
1152
1153         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1154                 input);
1155 #endif
1156
1157         prev = '\0';            /* previous character   */
1158
1159         while (inputcnt && outputcnt) {
1160                 c = *input++;
1161                 inputcnt--;
1162
1163                 if (state != 3) {
1164                         /* remove one level of escape characters */
1165                         if ((c == '\\') && (prev != '\\')) {
1166                                 if (inputcnt-- == 0)
1167                                         break;
1168                                 prev = c;
1169                                 c = *input++;
1170                         }
1171                 }
1172
1173                 switch (state) {
1174                 case 0: /* Waiting for (unescaped) $    */
1175                         if ((c == '\'') && (prev != '\\')) {
1176                                 state = 3;
1177                                 break;
1178                         }
1179                         if ((c == '$') && (prev != '\\')) {
1180                                 state++;
1181                         } else {
1182                                 *(output++) = c;
1183                                 outputcnt--;
1184                         }
1185                         break;
1186                 case 1: /* Waiting for (        */
1187                         if (c == '(' || c == '{') {
1188                                 state++;
1189                                 varname_start = input;
1190                         } else {
1191                                 state = 0;
1192                                 *(output++) = '$';
1193                                 outputcnt--;
1194
1195                                 if (outputcnt) {
1196                                         *(output++) = c;
1197                                         outputcnt--;
1198                                 }
1199                         }
1200                         break;
1201                 case 2: /* Waiting for )        */
1202                         if (c == ')' || c == '}') {
1203                                 int i;
1204                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1205                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1206
1207                                 /* Get the varname */
1208                                 for (i = 0; i < envcnt; i++) {
1209                                         envname[i] = varname_start[i];
1210                                 }
1211                                 envname[i] = 0;
1212
1213                                 /* Get its value */
1214                                 envval = getenv (envname);
1215
1216                                 /* Copy into the line if it exists */
1217                                 if (envval != NULL)
1218                                         while ((*envval) && outputcnt) {
1219                                                 *(output++) = *(envval++);
1220                                                 outputcnt--;
1221                                         }
1222                                 /* Look for another '$' */
1223                                 state = 0;
1224                         }
1225                         break;
1226                 case 3: /* Waiting for '        */
1227                         if ((c == '\'') && (prev != '\\')) {
1228                                 state = 0;
1229                         } else {
1230                                 *(output++) = c;
1231                                 outputcnt--;
1232                         }
1233                         break;
1234                 }
1235                 prev = c;
1236         }
1237
1238         if (outputcnt)
1239                 *output = 0;
1240         else
1241                 *(output - 1) = 0;
1242
1243 #ifdef DEBUG_PARSER
1244         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1245                 strlen (output_start), output_start);
1246 #endif
1247 }
1248
1249 /****************************************************************************
1250  * returns:
1251  *      1  - command executed, repeatable
1252  *      0  - command executed but not repeatable, interrupted commands are
1253  *           always considered not repeatable
1254  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1255  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1256  *           considered unrecognized)
1257  *
1258  * WARNING:
1259  *
1260  * We must create a temporary copy of the command since the command we get
1261  * may be the result from getenv(), which returns a pointer directly to
1262  * the environment data, which may change magicly when the command we run
1263  * creates or modifies environment variables (like "bootp" does).
1264  */
1265
1266 int run_command (const char *cmd, int flag)
1267 {
1268         cmd_tbl_t *cmdtp;
1269         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1270         char *token;                    /* start of token in cmdbuf     */
1271         char *sep;                      /* end of token (separator) in cmdbuf */
1272         char finaltoken[CONFIG_SYS_CBSIZE];
1273         char *str = cmdbuf;
1274         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1275         int argc, inquotes;
1276         int repeatable = 1;
1277         int rc = 0;
1278
1279 #ifdef DEBUG_PARSER
1280         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1281         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1282         puts ("\"\n");
1283 #endif
1284
1285         clear_ctrlc();          /* forget any previous Control C */
1286
1287         if (!cmd || !*cmd) {
1288                 return -1;      /* empty command */
1289         }
1290
1291         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1292                 puts ("## Command too long!\n");
1293                 return -1;
1294         }
1295
1296         strcpy (cmdbuf, cmd);
1297
1298         /* Process separators and check for invalid
1299          * repeatable commands
1300          */
1301
1302 #ifdef DEBUG_PARSER
1303         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1304 #endif
1305         while (*str) {
1306
1307                 /*
1308                  * Find separator, or string end
1309                  * Allow simple escape of ';' by writing "\;"
1310                  */
1311                 for (inquotes = 0, sep = str; *sep; sep++) {
1312                         if ((*sep=='\'') &&
1313                             (*(sep-1) != '\\'))
1314                                 inquotes=!inquotes;
1315
1316                         if (!inquotes &&
1317                             (*sep == ';') &&    /* separator            */
1318                             ( sep != str) &&    /* past string start    */
1319                             (*(sep-1) != '\\')) /* and NOT escaped      */
1320                                 break;
1321                 }
1322
1323                 /*
1324                  * Limit the token to data between separators
1325                  */
1326                 token = str;
1327                 if (*sep) {
1328                         str = sep + 1;  /* start of command for next pass */
1329                         *sep = '\0';
1330                 }
1331                 else
1332                         str = sep;      /* no more commands for next pass */
1333 #ifdef DEBUG_PARSER
1334                 printf ("token: \"%s\"\n", token);
1335 #endif
1336
1337                 /* find macros in this token and replace them */
1338                 process_macros (token, finaltoken);
1339
1340                 /* Extract arguments */
1341                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1342                         rc = -1;        /* no command at all */
1343                         continue;
1344                 }
1345
1346                 /* Look up command in command table */
1347                 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1348                         printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1349                         rc = -1;        /* give up after bad command */
1350                         continue;
1351                 }
1352
1353                 /* found - check max args */
1354                 if (argc > cmdtp->maxargs) {
1355                         cmd_usage(cmdtp);
1356                         rc = -1;
1357                         continue;
1358                 }
1359
1360 #if defined(CONFIG_CMD_BOOTD)
1361                 /* avoid "bootd" recursion */
1362                 if (cmdtp->cmd == do_bootd) {
1363 #ifdef DEBUG_PARSER
1364                         printf ("[%s]\n", finaltoken);
1365 #endif
1366                         if (flag & CMD_FLAG_BOOTD) {
1367                                 puts ("'bootd' recursion detected\n");
1368                                 rc = -1;
1369                                 continue;
1370                         } else {
1371                                 flag |= CMD_FLAG_BOOTD;
1372                         }
1373                 }
1374 #endif
1375
1376                 /* OK - call function to do the command */
1377                 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1378                         rc = -1;
1379                 }
1380
1381                 repeatable &= cmdtp->repeatable;
1382
1383                 /* Did the user stop this? */
1384                 if (had_ctrlc ())
1385                         return -1;      /* if stopped then not repeatable */
1386         }
1387
1388         return rc ? rc : repeatable;
1389 }
1390
1391 /****************************************************************************/
1392
1393 #if defined(CONFIG_CMD_RUN)
1394 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1395 {
1396         int i;
1397
1398         if (argc < 2)
1399                 return cmd_usage(cmdtp);
1400
1401         for (i=1; i<argc; ++i) {
1402                 char *arg;
1403
1404                 if ((arg = getenv (argv[i])) == NULL) {
1405                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1406                         return 1;
1407                 }
1408
1409                 if (run_command2(arg, flag) != 0)
1410                         return 1;
1411         }
1412         return 0;
1413 }
1414 #endif