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