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