1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* #define DEBUG */ 25 26 #include <common.h> 27 #include <watchdog.h> 28 #include <command.h> 29 #include <malloc.h> 30 31 #ifdef CFG_HUSH_PARSER 32 #include <hush.h> 33 #endif 34 35 #include <post.h> 36 37 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) 38 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */ 39 #endif 40 41 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 42 43 44 #define MAX_DELAY_STOP_STR 32 45 46 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 47 static int parse_line (char *, char *[]); 48 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 49 static int abortboot(int); 50 #endif 51 52 #undef DEBUG_PARSER 53 54 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */ 55 56 static char erase_seq[] = "\b \b"; /* erase sequence */ 57 static char tab_seq[] = " "; /* used to expand TABs */ 58 59 #ifdef CONFIG_BOOT_RETRY_TIME 60 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 61 static int retry_time = -1; /* -1 so can call readline before main_loop */ 62 #endif 63 64 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 65 66 #ifndef CONFIG_BOOT_RETRY_MIN 67 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 68 #endif 69 70 #ifdef CONFIG_MODEM_SUPPORT 71 int do_mdm_init = 0; 72 extern void mdm_init(void); /* defined in board.c */ 73 #endif 74 75 /*************************************************************************** 76 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 77 * returns: 0 - no key string, allow autoboot 78 * 1 - got key string, abort 79 */ 80 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 81 # if defined(CONFIG_AUTOBOOT_KEYED) 82 static __inline__ int abortboot(int bootdelay) 83 { 84 int abort = 0; 85 uint64_t etime = endtick(bootdelay); 86 struct 87 { 88 char* str; 89 u_int len; 90 int retry; 91 } 92 delaykey [] = 93 { 94 { str: getenv ("bootdelaykey"), retry: 1 }, 95 { str: getenv ("bootdelaykey2"), retry: 1 }, 96 { str: getenv ("bootstopkey"), retry: 0 }, 97 { str: getenv ("bootstopkey2"), retry: 0 }, 98 }; 99 100 char presskey [MAX_DELAY_STOP_STR]; 101 u_int presskey_len = 0; 102 u_int presskey_max = 0; 103 u_int i; 104 105 # ifdef CONFIG_AUTOBOOT_PROMPT 106 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay); 107 # endif 108 109 # ifdef CONFIG_AUTOBOOT_DELAY_STR 110 if (delaykey[0].str == NULL) 111 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 112 # endif 113 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 114 if (delaykey[1].str == NULL) 115 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 116 # endif 117 # ifdef CONFIG_AUTOBOOT_STOP_STR 118 if (delaykey[2].str == NULL) 119 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 120 # endif 121 # ifdef CONFIG_AUTOBOOT_STOP_STR2 122 if (delaykey[3].str == NULL) 123 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 124 # endif 125 126 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 127 delaykey[i].len = delaykey[i].str == NULL ? 128 0 : strlen (delaykey[i].str); 129 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 130 MAX_DELAY_STOP_STR : delaykey[i].len; 131 132 presskey_max = presskey_max > delaykey[i].len ? 133 presskey_max : delaykey[i].len; 134 135 # if DEBUG_BOOTKEYS 136 printf("%s key:<%s>\n", 137 delaykey[i].retry ? "delay" : "stop", 138 delaykey[i].str ? delaykey[i].str : "NULL"); 139 # endif 140 } 141 142 /* In order to keep up with incoming data, check timeout only 143 * when catch up. 144 */ 145 while (!abort && get_ticks() <= etime) { 146 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 147 if (delaykey[i].len > 0 && 148 presskey_len >= delaykey[i].len && 149 memcmp (presskey + presskey_len - delaykey[i].len, 150 delaykey[i].str, 151 delaykey[i].len) == 0) { 152 # if DEBUG_BOOTKEYS 153 printf("got %skey\n", 154 delaykey[i].retry ? "delay" : "stop"); 155 # endif 156 157 # ifdef CONFIG_BOOT_RETRY_TIME 158 /* don't retry auto boot */ 159 if (! delaykey[i].retry) 160 retry_time = -1; 161 # endif 162 abort = 1; 163 } 164 } 165 166 if (tstc()) { 167 if (presskey_len < presskey_max) { 168 presskey [presskey_len ++] = getc(); 169 } 170 else { 171 for (i = 0; i < presskey_max - 1; i ++) 172 presskey [i] = presskey [i + 1]; 173 174 presskey [i] = getc(); 175 } 176 } 177 } 178 # if DEBUG_BOOTKEYS 179 if (!abort) 180 printf("key timeout\n"); 181 # endif 182 183 return abort; 184 } 185 186 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 187 188 #ifdef CONFIG_MENUKEY 189 static int menukey = 0; 190 #endif 191 192 static __inline__ int abortboot(int bootdelay) 193 { 194 int abort = 0; 195 196 #ifdef CONFIG_SILENT_CONSOLE 197 { 198 DECLARE_GLOBAL_DATA_PTR; 199 200 if (gd->flags & GD_FLG_SILENT) { 201 /* Restore serial console */ 202 console_assign (stdout, "serial"); 203 console_assign (stderr, "serial"); 204 } 205 } 206 #endif 207 208 #ifdef CONFIG_MENUPROMPT 209 printf(CONFIG_MENUPROMPT, bootdelay); 210 #else 211 printf("Hit any key to stop autoboot: %2d ", bootdelay); 212 #endif 213 214 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 215 /* 216 * Check if key already pressed 217 * Don't check if bootdelay < 0 218 */ 219 if (bootdelay >= 0) { 220 if (tstc()) { /* we got a key press */ 221 (void) getc(); /* consume input */ 222 printf ("\b\b\b 0"); 223 abort = 1; /* don't auto boot */ 224 } 225 } 226 #endif 227 228 while ((bootdelay > 0) && (!abort)) { 229 int i; 230 231 --bootdelay; 232 /* delay 100 * 10ms */ 233 for (i=0; !abort && i<100; ++i) { 234 if (tstc()) { /* we got a key press */ 235 abort = 1; /* don't auto boot */ 236 bootdelay = 0; /* no more delay */ 237 # ifdef CONFIG_MENUKEY 238 menukey = getc(); 239 # else 240 (void) getc(); /* consume input */ 241 # endif 242 break; 243 } 244 udelay (10000); 245 } 246 247 printf ("\b\b\b%2d ", bootdelay); 248 } 249 250 putc ('\n'); 251 252 #ifdef CONFIG_SILENT_CONSOLE 253 { 254 DECLARE_GLOBAL_DATA_PTR; 255 256 if (abort) { 257 /* permanently enable normal console output */ 258 gd->flags &= ~(GD_FLG_SILENT); 259 } else if (gd->flags & GD_FLG_SILENT) { 260 /* Restore silent console */ 261 console_assign (stdout, "nulldev"); 262 console_assign (stderr, "nulldev"); 263 } 264 } 265 #endif 266 267 return abort; 268 } 269 # endif /* CONFIG_AUTOBOOT_KEYED */ 270 #endif /* CONFIG_BOOTDELAY >= 0 */ 271 272 /****************************************************************************/ 273 274 void main_loop (void) 275 { 276 #ifndef CFG_HUSH_PARSER 277 static char lastcommand[CFG_CBSIZE] = { 0, }; 278 int len; 279 int rc = 1; 280 int flag; 281 #endif 282 283 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 284 char *s; 285 int bootdelay; 286 #endif 287 #ifdef CONFIG_PREBOOT 288 char *p; 289 #endif 290 #ifdef CONFIG_BOOTCOUNT_LIMIT 291 unsigned long bootcount = 0; 292 unsigned long bootlimit = 0; 293 char *bcs; 294 char bcs_set[16]; 295 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 296 297 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 298 ulong bmp = 0; /* default bitmap */ 299 extern int trab_vfd (ulong bitmap); 300 301 #ifdef CONFIG_MODEM_SUPPORT 302 if (do_mdm_init) 303 bmp = 1; /* alternate bitmap */ 304 #endif 305 trab_vfd (bmp); 306 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 307 308 #ifdef CONFIG_BOOTCOUNT_LIMIT 309 bootcount = bootcount_load(); 310 bootcount++; 311 bootcount_store (bootcount); 312 sprintf (bcs_set, "%lu", bootcount); 313 setenv ("bootcount", bcs_set); 314 bcs = getenv ("bootlimit"); 315 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 316 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 317 318 #ifdef CONFIG_MODEM_SUPPORT 319 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 320 if (do_mdm_init) { 321 uchar *str = strdup(getenv("mdm_cmd")); 322 setenv ("preboot", str); /* set or delete definition */ 323 if (str != NULL) 324 free (str); 325 mdm_init(); /* wait for modem connection */ 326 } 327 #endif /* CONFIG_MODEM_SUPPORT */ 328 329 #ifdef CONFIG_VERSION_VARIABLE 330 { 331 extern char version_string[]; 332 333 setenv ("ver", version_string); /* set version variable */ 334 } 335 #endif /* CONFIG_VERSION_VARIABLE */ 336 337 #ifdef CFG_HUSH_PARSER 338 u_boot_hush_start (); 339 #endif 340 341 #ifdef CONFIG_PREBOOT 342 if ((p = getenv ("preboot")) != NULL) { 343 # ifdef CONFIG_AUTOBOOT_KEYED 344 int prev = disable_ctrlc(1); /* disable Control C checking */ 345 # endif 346 347 # ifndef CFG_HUSH_PARSER 348 run_command (p, 0); 349 # else 350 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 351 FLAG_EXIT_FROM_LOOP); 352 # endif 353 354 # ifdef CONFIG_AUTOBOOT_KEYED 355 disable_ctrlc(prev); /* restore Control C checking */ 356 # endif 357 } 358 #endif /* CONFIG_PREBOOT */ 359 360 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 361 s = getenv ("bootdelay"); 362 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 363 364 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 365 366 # ifdef CONFIG_BOOT_RETRY_TIME 367 init_cmd_timeout (); 368 # endif /* CONFIG_BOOT_RETRY_TIME */ 369 370 #ifdef CONFIG_BOOTCOUNT_LIMIT 371 if (bootlimit && (bootcount > bootlimit)) { 372 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 373 (unsigned)bootlimit); 374 s = getenv ("altbootcmd"); 375 } 376 else 377 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 378 s = getenv ("bootcmd"); 379 380 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 381 382 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 383 # ifdef CONFIG_AUTOBOOT_KEYED 384 int prev = disable_ctrlc(1); /* disable Control C checking */ 385 # endif 386 387 # ifndef CFG_HUSH_PARSER 388 run_command (s, 0); 389 # else 390 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 391 FLAG_EXIT_FROM_LOOP); 392 # endif 393 394 # ifdef CONFIG_AUTOBOOT_KEYED 395 disable_ctrlc(prev); /* restore Control C checking */ 396 # endif 397 } 398 399 # ifdef CONFIG_MENUKEY 400 if (menukey == CONFIG_MENUKEY) { 401 s = getenv("menucmd"); 402 if (s) { 403 # ifndef CFG_HUSH_PARSER 404 run_command (s, bd, 0); 405 # else 406 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 407 FLAG_EXIT_FROM_LOOP); 408 # endif 409 } 410 } 411 #endif /* CONFIG_MENUKEY */ 412 #endif /* CONFIG_BOOTDELAY */ 413 414 #ifdef CONFIG_AMIGAONEG3SE 415 { 416 extern void video_banner(void); 417 video_banner(); 418 } 419 #endif 420 421 /* 422 * Main Loop for Monitor Command Processing 423 */ 424 #ifdef CFG_HUSH_PARSER 425 parse_file_outer(); 426 /* This point is never reached */ 427 for (;;); 428 #else 429 for (;;) { 430 #ifdef CONFIG_BOOT_RETRY_TIME 431 if (rc >= 0) { 432 /* Saw enough of a valid command to 433 * restart the timeout. 434 */ 435 reset_cmd_timeout(); 436 } 437 #endif 438 len = readline (CFG_PROMPT); 439 440 flag = 0; /* assume no special flags for now */ 441 if (len > 0) 442 strcpy (lastcommand, console_buffer); 443 else if (len == 0) 444 flag |= CMD_FLAG_REPEAT; 445 #ifdef CONFIG_BOOT_RETRY_TIME 446 else if (len == -2) { 447 /* -2 means timed out, retry autoboot 448 */ 449 printf("\nTimed out waiting for command\n"); 450 # ifdef CONFIG_RESET_TO_RETRY 451 /* Reinit board to run initialization code again */ 452 do_reset (NULL, 0, 0, NULL); 453 # else 454 return; /* retry autoboot */ 455 # endif 456 } 457 #endif 458 459 if (len == -1) 460 printf ("<INTERRUPT>\n"); 461 else 462 rc = run_command (lastcommand, flag); 463 464 if (rc <= 0) { 465 /* invalid command or not repeatable, forget it */ 466 lastcommand[0] = 0; 467 } 468 } 469 #endif /*CFG_HUSH_PARSER*/ 470 } 471 472 #ifdef CONFIG_BOOT_RETRY_TIME 473 /*************************************************************************** 474 * initialise command line timeout 475 */ 476 void init_cmd_timeout(void) 477 { 478 char *s = getenv ("bootretry"); 479 480 if (s != NULL) 481 retry_time = (int)simple_strtoul(s, NULL, 10); 482 else 483 retry_time = CONFIG_BOOT_RETRY_TIME; 484 485 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 486 retry_time = CONFIG_BOOT_RETRY_MIN; 487 } 488 489 /*************************************************************************** 490 * reset command line timeout to retry_time seconds 491 */ 492 void reset_cmd_timeout(void) 493 { 494 endtime = endtick(retry_time); 495 } 496 #endif 497 498 /****************************************************************************/ 499 500 /* 501 * Prompt for input and read a line. 502 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 503 * time out when time goes past endtime (timebase time in ticks). 504 * Return: number of read characters 505 * -1 if break 506 * -2 if timed out 507 */ 508 int readline (const char *const prompt) 509 { 510 char *p = console_buffer; 511 int n = 0; /* buffer index */ 512 int plen = 0; /* prompt length */ 513 int col; /* output column cnt */ 514 char c; 515 516 /* print prompt */ 517 if (prompt) { 518 plen = strlen (prompt); 519 puts (prompt); 520 } 521 col = plen; 522 523 for (;;) { 524 #ifdef CONFIG_BOOT_RETRY_TIME 525 while (!tstc()) { /* while no incoming data */ 526 if (retry_time >= 0 && get_ticks() > endtime) 527 return (-2); /* timed out */ 528 } 529 #endif 530 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 531 532 #ifdef CONFIG_SHOW_ACTIVITY 533 while (!tstc()) { 534 extern void show_activity(int arg); 535 show_activity(0); 536 } 537 #endif 538 c = getc(); 539 540 /* 541 * Special character handling 542 */ 543 switch (c) { 544 case '\r': /* Enter */ 545 case '\n': 546 *p = '\0'; 547 puts ("\r\n"); 548 return (p - console_buffer); 549 550 case 0x03: /* ^C - break */ 551 console_buffer[0] = '\0'; /* discard input */ 552 return (-1); 553 554 case 0x15: /* ^U - erase line */ 555 while (col > plen) { 556 puts (erase_seq); 557 --col; 558 } 559 p = console_buffer; 560 n = 0; 561 continue; 562 563 case 0x17: /* ^W - erase word */ 564 p=delete_char(console_buffer, p, &col, &n, plen); 565 while ((n > 0) && (*p != ' ')) { 566 p=delete_char(console_buffer, p, &col, &n, plen); 567 } 568 continue; 569 570 case 0x08: /* ^H - backspace */ 571 case 0x7F: /* DEL - backspace */ 572 p=delete_char(console_buffer, p, &col, &n, plen); 573 continue; 574 575 default: 576 /* 577 * Must be a normal character then 578 */ 579 if (n < CFG_CBSIZE-2) { 580 if (c == '\t') { /* expand TABs */ 581 puts (tab_seq+(col&07)); 582 col += 8 - (col&07); 583 } else { 584 ++col; /* echo input */ 585 putc (c); 586 } 587 *p++ = c; 588 ++n; 589 } else { /* Buffer full */ 590 putc ('\a'); 591 } 592 } 593 } 594 } 595 596 /****************************************************************************/ 597 598 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 599 { 600 char *s; 601 602 if (*np == 0) { 603 return (p); 604 } 605 606 if (*(--p) == '\t') { /* will retype the whole line */ 607 while (*colp > plen) { 608 puts (erase_seq); 609 (*colp)--; 610 } 611 for (s=buffer; s<p; ++s) { 612 if (*s == '\t') { 613 puts (tab_seq+((*colp) & 07)); 614 *colp += 8 - ((*colp) & 07); 615 } else { 616 ++(*colp); 617 putc (*s); 618 } 619 } 620 } else { 621 puts (erase_seq); 622 (*colp)--; 623 } 624 (*np)--; 625 return (p); 626 } 627 628 /****************************************************************************/ 629 630 int parse_line (char *line, char *argv[]) 631 { 632 int nargs = 0; 633 634 #ifdef DEBUG_PARSER 635 printf ("parse_line: \"%s\"\n", line); 636 #endif 637 while (nargs < CFG_MAXARGS) { 638 639 /* skip any white space */ 640 while ((*line == ' ') || (*line == '\t')) { 641 ++line; 642 } 643 644 if (*line == '\0') { /* end of line, no more args */ 645 argv[nargs] = NULL; 646 #ifdef DEBUG_PARSER 647 printf ("parse_line: nargs=%d\n", nargs); 648 #endif 649 return (nargs); 650 } 651 652 argv[nargs++] = line; /* begin of argument string */ 653 654 /* find end of string */ 655 while (*line && (*line != ' ') && (*line != '\t')) { 656 ++line; 657 } 658 659 if (*line == '\0') { /* end of line, no more args */ 660 argv[nargs] = NULL; 661 #ifdef DEBUG_PARSER 662 printf ("parse_line: nargs=%d\n", nargs); 663 #endif 664 return (nargs); 665 } 666 667 *line++ = '\0'; /* terminate current arg */ 668 } 669 670 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 671 672 #ifdef DEBUG_PARSER 673 printf ("parse_line: nargs=%d\n", nargs); 674 #endif 675 return (nargs); 676 } 677 678 /****************************************************************************/ 679 680 static void process_macros (const char *input, char *output) 681 { 682 char c, prev; 683 const char *varname_start = NULL; 684 int inputcnt = strlen (input); 685 int outputcnt = CFG_CBSIZE; 686 int state = 0; /* 0 = waiting for '$' */ 687 /* 1 = waiting for '(' */ 688 /* 2 = waiting for ')' */ 689 /* 3 = waiting for ''' */ 690 #ifdef DEBUG_PARSER 691 char *output_start = output; 692 693 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input); 694 #endif 695 696 prev = '\0'; /* previous character */ 697 698 while (inputcnt && outputcnt) { 699 c = *input++; 700 inputcnt--; 701 702 if (state!=3) { 703 /* remove one level of escape characters */ 704 if ((c == '\\') && (prev != '\\')) { 705 if (inputcnt-- == 0) 706 break; 707 prev = c; 708 c = *input++; 709 } 710 } 711 712 switch (state) { 713 case 0: /* Waiting for (unescaped) $ */ 714 if ((c == '\'') && (prev != '\\')) { 715 state = 3; 716 break; 717 } 718 if ((c == '$') && (prev != '\\')) { 719 state++; 720 } else { 721 *(output++) = c; 722 outputcnt--; 723 } 724 break; 725 case 1: /* Waiting for ( */ 726 if (c == '(') { 727 state++; 728 varname_start = input; 729 } else { 730 state = 0; 731 *(output++) = '$'; 732 outputcnt--; 733 734 if (outputcnt) { 735 *(output++) = c; 736 outputcnt--; 737 } 738 } 739 break; 740 case 2: /* Waiting for ) */ 741 if (c == ')') { 742 int i; 743 char envname[CFG_CBSIZE], *envval; 744 int envcnt = input-varname_start-1; /* Varname # of chars */ 745 746 /* Get the varname */ 747 for (i = 0; i < envcnt; i++) { 748 envname[i] = varname_start[i]; 749 } 750 envname[i] = 0; 751 752 /* Get its value */ 753 envval = getenv (envname); 754 755 /* Copy into the line if it exists */ 756 if (envval != NULL) 757 while ((*envval) && outputcnt) { 758 *(output++) = *(envval++); 759 outputcnt--; 760 } 761 /* Look for another '$' */ 762 state = 0; 763 } 764 break; 765 case 3: /* Waiting for ' */ 766 if ((c == '\'') && (prev != '\\')) { 767 state = 0; 768 } else { 769 *(output++) = c; 770 outputcnt--; 771 } 772 break; 773 } 774 prev = c; 775 } 776 777 if (outputcnt) 778 *output = 0; 779 780 #ifdef DEBUG_PARSER 781 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 782 strlen(output_start), output_start); 783 #endif 784 } 785 786 /**************************************************************************** 787 * returns: 788 * 1 - command executed, repeatable 789 * 0 - command executed but not repeatable, interrupted commands are 790 * always considered not repeatable 791 * -1 - not executed (unrecognized, bootd recursion or too many args) 792 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 793 * considered unrecognized) 794 * 795 * WARNING: 796 * 797 * We must create a temporary copy of the command since the command we get 798 * may be the result from getenv(), which returns a pointer directly to 799 * the environment data, which may change magicly when the command we run 800 * creates or modifies environment variables (like "bootp" does). 801 */ 802 803 int run_command (const char *cmd, int flag) 804 { 805 cmd_tbl_t *cmdtp; 806 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 807 char *token; /* start of token in cmdbuf */ 808 char *sep; /* end of token (separator) in cmdbuf */ 809 char finaltoken[CFG_CBSIZE]; 810 char *str = cmdbuf; 811 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 812 int argc, inquotes; 813 int repeatable = 1; 814 int rc = 0; 815 816 #ifdef DEBUG_PARSER 817 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 818 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 819 puts ("\"\n"); 820 #endif 821 822 clear_ctrlc(); /* forget any previous Control C */ 823 824 if (!cmd || !*cmd) { 825 return -1; /* empty command */ 826 } 827 828 if (strlen(cmd) >= CFG_CBSIZE) { 829 puts ("## Command too long!\n"); 830 return -1; 831 } 832 833 strcpy (cmdbuf, cmd); 834 835 /* Process separators and check for invalid 836 * repeatable commands 837 */ 838 839 #ifdef DEBUG_PARSER 840 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 841 #endif 842 while (*str) { 843 844 /* 845 * Find separator, or string end 846 * Allow simple escape of ';' by writing "\;" 847 */ 848 for (inquotes = 0, sep = str; *sep; sep++) { 849 if ((*sep=='\'') && 850 (*(sep-1) != '\\')) 851 inquotes=!inquotes; 852 853 if (!inquotes && 854 (*sep == ';') && /* separator */ 855 ( sep != str) && /* past string start */ 856 (*(sep-1) != '\\')) /* and NOT escaped */ 857 break; 858 } 859 860 /* 861 * Limit the token to data between separators 862 */ 863 token = str; 864 if (*sep) { 865 str = sep + 1; /* start of command for next pass */ 866 *sep = '\0'; 867 } 868 else 869 str = sep; /* no more commands for next pass */ 870 #ifdef DEBUG_PARSER 871 printf ("token: \"%s\"\n", token); 872 #endif 873 874 /* find macros in this token and replace them */ 875 process_macros (token, finaltoken); 876 877 /* Extract arguments */ 878 argc = parse_line (finaltoken, argv); 879 880 /* Look up command in command table */ 881 if ((cmdtp = find_cmd(argv[0])) == NULL) { 882 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 883 rc = -1; /* give up after bad command */ 884 continue; 885 } 886 887 /* found - check max args */ 888 if (argc > cmdtp->maxargs) { 889 printf ("Usage:\n%s\n", cmdtp->usage); 890 rc = -1; 891 continue; 892 } 893 894 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 895 /* avoid "bootd" recursion */ 896 if (cmdtp->cmd == do_bootd) { 897 #ifdef DEBUG_PARSER 898 printf ("[%s]\n", finaltoken); 899 #endif 900 if (flag & CMD_FLAG_BOOTD) { 901 printf ("'bootd' recursion detected\n"); 902 rc = -1; 903 continue; 904 } 905 else 906 flag |= CMD_FLAG_BOOTD; 907 } 908 #endif /* CFG_CMD_BOOTD */ 909 910 /* OK - call function to do the command */ 911 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 912 rc = -1; 913 } 914 915 repeatable &= cmdtp->repeatable; 916 917 /* Did the user stop this? */ 918 if (had_ctrlc ()) 919 return 0; /* if stopped then not repeatable */ 920 } 921 922 return rc ? rc : repeatable; 923 } 924 925 /****************************************************************************/ 926 927 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 928 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 929 { 930 int i; 931 932 if (argc < 2) { 933 printf ("Usage:\n%s\n", cmdtp->usage); 934 return 1; 935 } 936 937 for (i=1; i<argc; ++i) { 938 char *arg; 939 940 if ((arg = getenv (argv[i])) == NULL) { 941 printf ("## Error: \"%s\" not defined\n", argv[i]); 942 return 1; 943 } 944 #ifndef CFG_HUSH_PARSER 945 if (run_command (arg, flag) == -1) 946 return 1; 947 #else 948 if (parse_string_outer(arg, 949 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 950 return 1; 951 #endif 952 } 953 return 0; 954 } 955 #endif /* CFG_CMD_RUN */ 956