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_MENUPROMPT 197 printf(CONFIG_MENUPROMPT, bootdelay); 198 #else 199 printf("Hit any key to stop autoboot: %2d ", bootdelay); 200 #endif 201 202 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 203 /* 204 * Check if key already pressed 205 * Don't check if bootdelay < 0 206 */ 207 if (bootdelay >= 0) { 208 if (tstc()) { /* we got a key press */ 209 (void) getc(); /* consume input */ 210 printf ("\b\b\b 0\n"); 211 return 1; /* don't auto boot */ 212 } 213 } 214 #endif 215 216 while (bootdelay > 0) { 217 int i; 218 219 --bootdelay; 220 /* delay 100 * 10ms */ 221 for (i=0; !abort && i<100; ++i) { 222 if (tstc()) { /* we got a key press */ 223 abort = 1; /* don't auto boot */ 224 bootdelay = 0; /* no more delay */ 225 # ifdef CONFIG_MENUKEY 226 menukey = getc(); 227 # else 228 (void) getc(); /* consume input */ 229 # endif 230 break; 231 } 232 udelay (10000); 233 } 234 235 printf ("\b\b\b%2d ", bootdelay); 236 } 237 238 putc ('\n'); 239 240 return abort; 241 } 242 # endif /* CONFIG_AUTOBOOT_KEYED */ 243 #endif /* CONFIG_BOOTDELAY >= 0 */ 244 245 /****************************************************************************/ 246 247 void main_loop (void) 248 { 249 #ifndef CFG_HUSH_PARSER 250 static char lastcommand[CFG_CBSIZE] = { 0, }; 251 int len; 252 int rc = 1; 253 int flag; 254 #endif 255 256 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 257 char *s; 258 int bootdelay; 259 #endif 260 #ifdef CONFIG_PREBOOT 261 char *p; 262 #endif 263 #ifdef CONFIG_BOOTCOUNT_LIMIT 264 unsigned long bootcount = 0; 265 unsigned long bootlimit = 0; 266 char *bcs; 267 char bcs_set[16]; 268 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 269 270 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 271 ulong bmp = 0; /* default bitmap */ 272 extern int trab_vfd (ulong bitmap); 273 274 #ifdef CONFIG_MODEM_SUPPORT 275 if (do_mdm_init) 276 bmp = 1; /* alternate bitmap */ 277 #endif 278 trab_vfd (bmp); 279 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 280 281 #ifdef CONFIG_BOOTCOUNT_LIMIT 282 bootcount = bootcount_load(); 283 bootcount++; 284 bootcount_store (bootcount); 285 sprintf (bcs_set, "%lu", bootcount); 286 setenv ("bootcount", bcs_set); 287 bcs = getenv ("bootlimit"); 288 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 289 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 290 291 #ifdef CONFIG_MODEM_SUPPORT 292 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 293 if (do_mdm_init) { 294 uchar *str = strdup(getenv("mdm_cmd")); 295 setenv ("preboot", str); /* set or delete definition */ 296 if (str != NULL) 297 free (str); 298 mdm_init(); /* wait for modem connection */ 299 } 300 #endif /* CONFIG_MODEM_SUPPORT */ 301 302 #ifdef CONFIG_VERSION_VARIABLE 303 { 304 extern char version_string[]; 305 306 setenv ("ver", version_string); /* set version variable */ 307 } 308 #endif /* CONFIG_VERSION_VARIABLE */ 309 310 #ifdef CFG_HUSH_PARSER 311 u_boot_hush_start (); 312 #endif 313 314 #ifdef CONFIG_PREBOOT 315 if ((p = getenv ("preboot")) != NULL) { 316 # ifdef CONFIG_AUTOBOOT_KEYED 317 int prev = disable_ctrlc(1); /* disable Control C checking */ 318 # endif 319 320 # ifndef CFG_HUSH_PARSER 321 run_command (p, 0); 322 # else 323 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 324 FLAG_EXIT_FROM_LOOP); 325 # endif 326 327 # ifdef CONFIG_AUTOBOOT_KEYED 328 disable_ctrlc(prev); /* restore Control C checking */ 329 # endif 330 } 331 #endif /* CONFIG_PREBOOT */ 332 333 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 334 s = getenv ("bootdelay"); 335 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 336 337 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 338 339 # ifdef CONFIG_BOOT_RETRY_TIME 340 init_cmd_timeout (); 341 # endif /* CONFIG_BOOT_RETRY_TIME */ 342 343 #ifdef CONFIG_BOOTCOUNT_LIMIT 344 if (bootlimit && (bootcount > bootlimit)) { 345 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 346 (unsigned)bootlimit); 347 s = getenv ("altbootcmd"); 348 } 349 else 350 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 351 s = getenv ("bootcmd"); 352 353 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 354 355 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 356 # ifdef CONFIG_AUTOBOOT_KEYED 357 int prev = disable_ctrlc(1); /* disable Control C checking */ 358 # endif 359 360 # ifndef CFG_HUSH_PARSER 361 run_command (s, 0); 362 # else 363 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 364 FLAG_EXIT_FROM_LOOP); 365 # endif 366 367 # ifdef CONFIG_AUTOBOOT_KEYED 368 disable_ctrlc(prev); /* restore Control C checking */ 369 # endif 370 } 371 372 # ifdef CONFIG_MENUKEY 373 if (menukey == CONFIG_MENUKEY) { 374 s = getenv("menucmd"); 375 if (s) { 376 # ifndef CFG_HUSH_PARSER 377 run_command (s, bd, 0); 378 # else 379 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 380 FLAG_EXIT_FROM_LOOP); 381 # endif 382 } 383 } 384 #endif /* CONFIG_MENUKEY */ 385 #endif /* CONFIG_BOOTDELAY */ 386 387 #ifdef CONFIG_AMIGAONEG3SE 388 { 389 extern void video_banner(void); 390 video_banner(); 391 } 392 #endif 393 394 /* 395 * Main Loop for Monitor Command Processing 396 */ 397 #ifdef CFG_HUSH_PARSER 398 parse_file_outer(); 399 /* This point is never reached */ 400 for (;;); 401 #else 402 for (;;) { 403 #ifdef CONFIG_BOOT_RETRY_TIME 404 if (rc >= 0) { 405 /* Saw enough of a valid command to 406 * restart the timeout. 407 */ 408 reset_cmd_timeout(); 409 } 410 #endif 411 len = readline (CFG_PROMPT); 412 413 flag = 0; /* assume no special flags for now */ 414 if (len > 0) 415 strcpy (lastcommand, console_buffer); 416 else if (len == 0) 417 flag |= CMD_FLAG_REPEAT; 418 #ifdef CONFIG_BOOT_RETRY_TIME 419 else if (len == -2) { 420 /* -2 means timed out, retry autoboot 421 */ 422 printf("\nTimed out waiting for command\n"); 423 # ifdef CONFIG_RESET_TO_RETRY 424 /* Reinit board to run initialization code again */ 425 do_reset (NULL, 0, 0, NULL); 426 # else 427 return; /* retry autoboot */ 428 # endif 429 } 430 #endif 431 432 if (len == -1) 433 printf ("<INTERRUPT>\n"); 434 else 435 rc = run_command (lastcommand, flag); 436 437 if (rc <= 0) { 438 /* invalid command or not repeatable, forget it */ 439 lastcommand[0] = 0; 440 } 441 } 442 #endif /*CFG_HUSH_PARSER*/ 443 } 444 445 #ifdef CONFIG_BOOT_RETRY_TIME 446 /*************************************************************************** 447 * initialise command line timeout 448 */ 449 void init_cmd_timeout(void) 450 { 451 char *s = getenv ("bootretry"); 452 453 if (s != NULL) 454 retry_time = (int)simple_strtoul(s, NULL, 10); 455 else 456 retry_time = CONFIG_BOOT_RETRY_TIME; 457 458 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 459 retry_time = CONFIG_BOOT_RETRY_MIN; 460 } 461 462 /*************************************************************************** 463 * reset command line timeout to retry_time seconds 464 */ 465 void reset_cmd_timeout(void) 466 { 467 endtime = endtick(retry_time); 468 } 469 #endif 470 471 /****************************************************************************/ 472 473 /* 474 * Prompt for input and read a line. 475 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 476 * time out when time goes past endtime (timebase time in ticks). 477 * Return: number of read characters 478 * -1 if break 479 * -2 if timed out 480 */ 481 int readline (const char *const prompt) 482 { 483 char *p = console_buffer; 484 int n = 0; /* buffer index */ 485 int plen = 0; /* prompt length */ 486 int col; /* output column cnt */ 487 char c; 488 489 /* print prompt */ 490 if (prompt) { 491 plen = strlen (prompt); 492 puts (prompt); 493 } 494 col = plen; 495 496 for (;;) { 497 #ifdef CONFIG_BOOT_RETRY_TIME 498 while (!tstc()) { /* while no incoming data */ 499 if (retry_time >= 0 && get_ticks() > endtime) 500 return (-2); /* timed out */ 501 } 502 #endif 503 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 504 505 #ifdef CONFIG_SHOW_ACTIVITY 506 while (!tstc()) { 507 extern void show_activity(int arg); 508 show_activity(0); 509 } 510 #endif 511 c = getc(); 512 513 /* 514 * Special character handling 515 */ 516 switch (c) { 517 case '\r': /* Enter */ 518 case '\n': 519 *p = '\0'; 520 puts ("\r\n"); 521 return (p - console_buffer); 522 523 case 0x03: /* ^C - break */ 524 console_buffer[0] = '\0'; /* discard input */ 525 return (-1); 526 527 case 0x15: /* ^U - erase line */ 528 while (col > plen) { 529 puts (erase_seq); 530 --col; 531 } 532 p = console_buffer; 533 n = 0; 534 continue; 535 536 case 0x17: /* ^W - erase word */ 537 p=delete_char(console_buffer, p, &col, &n, plen); 538 while ((n > 0) && (*p != ' ')) { 539 p=delete_char(console_buffer, p, &col, &n, plen); 540 } 541 continue; 542 543 case 0x08: /* ^H - backspace */ 544 case 0x7F: /* DEL - backspace */ 545 p=delete_char(console_buffer, p, &col, &n, plen); 546 continue; 547 548 default: 549 /* 550 * Must be a normal character then 551 */ 552 if (n < CFG_CBSIZE-2) { 553 if (c == '\t') { /* expand TABs */ 554 puts (tab_seq+(col&07)); 555 col += 8 - (col&07); 556 } else { 557 ++col; /* echo input */ 558 putc (c); 559 } 560 *p++ = c; 561 ++n; 562 } else { /* Buffer full */ 563 putc ('\a'); 564 } 565 } 566 } 567 } 568 569 /****************************************************************************/ 570 571 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 572 { 573 char *s; 574 575 if (*np == 0) { 576 return (p); 577 } 578 579 if (*(--p) == '\t') { /* will retype the whole line */ 580 while (*colp > plen) { 581 puts (erase_seq); 582 (*colp)--; 583 } 584 for (s=buffer; s<p; ++s) { 585 if (*s == '\t') { 586 puts (tab_seq+((*colp) & 07)); 587 *colp += 8 - ((*colp) & 07); 588 } else { 589 ++(*colp); 590 putc (*s); 591 } 592 } 593 } else { 594 puts (erase_seq); 595 (*colp)--; 596 } 597 (*np)--; 598 return (p); 599 } 600 601 /****************************************************************************/ 602 603 int parse_line (char *line, char *argv[]) 604 { 605 int nargs = 0; 606 607 #ifdef DEBUG_PARSER 608 printf ("parse_line: \"%s\"\n", line); 609 #endif 610 while (nargs < CFG_MAXARGS) { 611 612 /* skip any white space */ 613 while ((*line == ' ') || (*line == '\t')) { 614 ++line; 615 } 616 617 if (*line == '\0') { /* end of line, no more args */ 618 argv[nargs] = NULL; 619 #ifdef DEBUG_PARSER 620 printf ("parse_line: nargs=%d\n", nargs); 621 #endif 622 return (nargs); 623 } 624 625 argv[nargs++] = line; /* begin of argument string */ 626 627 /* find end of string */ 628 while (*line && (*line != ' ') && (*line != '\t')) { 629 ++line; 630 } 631 632 if (*line == '\0') { /* end of line, no more args */ 633 argv[nargs] = NULL; 634 #ifdef DEBUG_PARSER 635 printf ("parse_line: nargs=%d\n", nargs); 636 #endif 637 return (nargs); 638 } 639 640 *line++ = '\0'; /* terminate current arg */ 641 } 642 643 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 644 645 #ifdef DEBUG_PARSER 646 printf ("parse_line: nargs=%d\n", nargs); 647 #endif 648 return (nargs); 649 } 650 651 /****************************************************************************/ 652 653 static void process_macros (const char *input, char *output) 654 { 655 char c, prev; 656 const char *varname_start = NULL; 657 int inputcnt = strlen (input); 658 int outputcnt = CFG_CBSIZE; 659 int state = 0; /* 0 = waiting for '$' */ 660 /* 1 = waiting for '(' */ 661 /* 2 = waiting for ')' */ 662 /* 3 = waiting for ''' */ 663 #ifdef DEBUG_PARSER 664 char *output_start = output; 665 666 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input); 667 #endif 668 669 prev = '\0'; /* previous character */ 670 671 while (inputcnt && outputcnt) { 672 c = *input++; 673 inputcnt--; 674 675 if (state!=3) { 676 /* remove one level of escape characters */ 677 if ((c == '\\') && (prev != '\\')) { 678 if (inputcnt-- == 0) 679 break; 680 prev = c; 681 c = *input++; 682 } 683 } 684 685 switch (state) { 686 case 0: /* Waiting for (unescaped) $ */ 687 if ((c == '\'') && (prev != '\\')) { 688 state = 3; 689 break; 690 } 691 if ((c == '$') && (prev != '\\')) { 692 state++; 693 } else { 694 *(output++) = c; 695 outputcnt--; 696 } 697 break; 698 case 1: /* Waiting for ( */ 699 if (c == '(') { 700 state++; 701 varname_start = input; 702 } else { 703 state = 0; 704 *(output++) = '$'; 705 outputcnt--; 706 707 if (outputcnt) { 708 *(output++) = c; 709 outputcnt--; 710 } 711 } 712 break; 713 case 2: /* Waiting for ) */ 714 if (c == ')') { 715 int i; 716 char envname[CFG_CBSIZE], *envval; 717 int envcnt = input-varname_start-1; /* Varname # of chars */ 718 719 /* Get the varname */ 720 for (i = 0; i < envcnt; i++) { 721 envname[i] = varname_start[i]; 722 } 723 envname[i] = 0; 724 725 /* Get its value */ 726 envval = getenv (envname); 727 728 /* Copy into the line if it exists */ 729 if (envval != NULL) 730 while ((*envval) && outputcnt) { 731 *(output++) = *(envval++); 732 outputcnt--; 733 } 734 /* Look for another '$' */ 735 state = 0; 736 } 737 break; 738 case 3: /* Waiting for ' */ 739 if ((c == '\'') && (prev != '\\')) { 740 state = 0; 741 } else { 742 *(output++) = c; 743 outputcnt--; 744 } 745 break; 746 } 747 prev = c; 748 } 749 750 if (outputcnt) 751 *output = 0; 752 753 #ifdef DEBUG_PARSER 754 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 755 strlen(output_start), output_start); 756 #endif 757 } 758 759 /**************************************************************************** 760 * returns: 761 * 1 - command executed, repeatable 762 * 0 - command executed but not repeatable, interrupted commands are 763 * always considered not repeatable 764 * -1 - not executed (unrecognized, bootd recursion or too many args) 765 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 766 * considered unrecognized) 767 * 768 * WARNING: 769 * 770 * We must create a temporary copy of the command since the command we get 771 * may be the result from getenv(), which returns a pointer directly to 772 * the environment data, which may change magicly when the command we run 773 * creates or modifies environment variables (like "bootp" does). 774 */ 775 776 int run_command (const char *cmd, int flag) 777 { 778 cmd_tbl_t *cmdtp; 779 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 780 char *token; /* start of token in cmdbuf */ 781 char *sep; /* end of token (separator) in cmdbuf */ 782 char finaltoken[CFG_CBSIZE]; 783 char *str = cmdbuf; 784 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 785 int argc, inquotes; 786 int repeatable = 1; 787 int rc = 0; 788 789 #ifdef DEBUG_PARSER 790 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 791 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 792 puts ("\"\n"); 793 #endif 794 795 clear_ctrlc(); /* forget any previous Control C */ 796 797 if (!cmd || !*cmd) { 798 return -1; /* empty command */ 799 } 800 801 if (strlen(cmd) >= CFG_CBSIZE) { 802 puts ("## Command too long!\n"); 803 return -1; 804 } 805 806 strcpy (cmdbuf, cmd); 807 808 /* Process separators and check for invalid 809 * repeatable commands 810 */ 811 812 #ifdef DEBUG_PARSER 813 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 814 #endif 815 while (*str) { 816 817 /* 818 * Find separator, or string end 819 * Allow simple escape of ';' by writing "\;" 820 */ 821 for (inquotes = 0, sep = str; *sep; sep++) { 822 if ((*sep=='\'') && 823 (*(sep-1) != '\\')) 824 inquotes=!inquotes; 825 826 if (!inquotes && 827 (*sep == ';') && /* separator */ 828 ( sep != str) && /* past string start */ 829 (*(sep-1) != '\\')) /* and NOT escaped */ 830 break; 831 } 832 833 /* 834 * Limit the token to data between separators 835 */ 836 token = str; 837 if (*sep) { 838 str = sep + 1; /* start of command for next pass */ 839 *sep = '\0'; 840 } 841 else 842 str = sep; /* no more commands for next pass */ 843 #ifdef DEBUG_PARSER 844 printf ("token: \"%s\"\n", token); 845 #endif 846 847 /* find macros in this token and replace them */ 848 process_macros (token, finaltoken); 849 850 /* Extract arguments */ 851 argc = parse_line (finaltoken, argv); 852 853 /* Look up command in command table */ 854 if ((cmdtp = find_cmd(argv[0])) == NULL) { 855 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 856 rc = -1; /* give up after bad command */ 857 continue; 858 } 859 860 /* found - check max args */ 861 if (argc > cmdtp->maxargs) { 862 printf ("Usage:\n%s\n", cmdtp->usage); 863 rc = -1; 864 continue; 865 } 866 867 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 868 /* avoid "bootd" recursion */ 869 if (cmdtp->cmd == do_bootd) { 870 #ifdef DEBUG_PARSER 871 printf ("[%s]\n", finaltoken); 872 #endif 873 if (flag & CMD_FLAG_BOOTD) { 874 printf ("'bootd' recursion detected\n"); 875 rc = -1; 876 continue; 877 } 878 else 879 flag |= CMD_FLAG_BOOTD; 880 } 881 #endif /* CFG_CMD_BOOTD */ 882 883 /* OK - call function to do the command */ 884 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 885 rc = -1; 886 } 887 888 repeatable &= cmdtp->repeatable; 889 890 /* Did the user stop this? */ 891 if (had_ctrlc ()) 892 return 0; /* if stopped then not repeatable */ 893 } 894 895 return rc ? rc : repeatable; 896 } 897 898 /****************************************************************************/ 899 900 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 901 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 902 { 903 int i; 904 905 if (argc < 2) { 906 printf ("Usage:\n%s\n", cmdtp->usage); 907 return 1; 908 } 909 910 for (i=1; i<argc; ++i) { 911 char *arg; 912 913 if ((arg = getenv (argv[i])) == NULL) { 914 printf ("## Error: \"%s\" not defined\n", argv[i]); 915 return 1; 916 } 917 #ifndef CFG_HUSH_PARSER 918 if (run_command (arg, flag) == -1) 919 return 1; 920 #else 921 if (parse_string_outer(arg, 922 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 923 return 1; 924 #endif 925 } 926 return 0; 927 } 928 #endif /* CFG_CMD_RUN */ 929