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_SILENT_CONSOLE 106 { 107 DECLARE_GLOBAL_DATA_PTR; 108 109 if (gd->flags & GD_FLG_SILENT) { 110 /* Restore serial console */ 111 console_assign (stdout, "serial"); 112 console_assign (stderr, "serial"); 113 } 114 } 115 #endif 116 117 # ifdef CONFIG_AUTOBOOT_PROMPT 118 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay); 119 # endif 120 121 # ifdef CONFIG_AUTOBOOT_DELAY_STR 122 if (delaykey[0].str == NULL) 123 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 124 # endif 125 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 126 if (delaykey[1].str == NULL) 127 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 128 # endif 129 # ifdef CONFIG_AUTOBOOT_STOP_STR 130 if (delaykey[2].str == NULL) 131 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 132 # endif 133 # ifdef CONFIG_AUTOBOOT_STOP_STR2 134 if (delaykey[3].str == NULL) 135 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 136 # endif 137 138 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 139 delaykey[i].len = delaykey[i].str == NULL ? 140 0 : strlen (delaykey[i].str); 141 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 142 MAX_DELAY_STOP_STR : delaykey[i].len; 143 144 presskey_max = presskey_max > delaykey[i].len ? 145 presskey_max : delaykey[i].len; 146 147 # if DEBUG_BOOTKEYS 148 printf("%s key:<%s>\n", 149 delaykey[i].retry ? "delay" : "stop", 150 delaykey[i].str ? delaykey[i].str : "NULL"); 151 # endif 152 } 153 154 /* In order to keep up with incoming data, check timeout only 155 * when catch up. 156 */ 157 while (!abort && get_ticks() <= etime) { 158 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 159 if (delaykey[i].len > 0 && 160 presskey_len >= delaykey[i].len && 161 memcmp (presskey + presskey_len - delaykey[i].len, 162 delaykey[i].str, 163 delaykey[i].len) == 0) { 164 # if DEBUG_BOOTKEYS 165 printf("got %skey\n", 166 delaykey[i].retry ? "delay" : "stop"); 167 # endif 168 169 # ifdef CONFIG_BOOT_RETRY_TIME 170 /* don't retry auto boot */ 171 if (! delaykey[i].retry) 172 retry_time = -1; 173 # endif 174 abort = 1; 175 } 176 } 177 178 if (tstc()) { 179 if (presskey_len < presskey_max) { 180 presskey [presskey_len ++] = getc(); 181 } 182 else { 183 for (i = 0; i < presskey_max - 1; i ++) 184 presskey [i] = presskey [i + 1]; 185 186 presskey [i] = getc(); 187 } 188 } 189 } 190 # if DEBUG_BOOTKEYS 191 if (!abort) 192 puts ("key timeout\n"); 193 # endif 194 195 #ifdef CONFIG_SILENT_CONSOLE 196 { 197 DECLARE_GLOBAL_DATA_PTR; 198 199 if (abort) { 200 /* permanently enable normal console output */ 201 gd->flags &= ~(GD_FLG_SILENT); 202 } else if (gd->flags & GD_FLG_SILENT) { 203 /* Restore silent console */ 204 console_assign (stdout, "nulldev"); 205 console_assign (stderr, "nulldev"); 206 } 207 } 208 #endif 209 210 return abort; 211 } 212 213 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 214 215 #ifdef CONFIG_MENUKEY 216 static int menukey = 0; 217 #endif 218 219 static __inline__ int abortboot(int bootdelay) 220 { 221 int abort = 0; 222 223 #ifdef CONFIG_SILENT_CONSOLE 224 { 225 DECLARE_GLOBAL_DATA_PTR; 226 227 if (gd->flags & GD_FLG_SILENT) { 228 /* Restore serial console */ 229 console_assign (stdout, "serial"); 230 console_assign (stderr, "serial"); 231 } 232 } 233 #endif 234 235 #ifdef CONFIG_MENUPROMPT 236 printf(CONFIG_MENUPROMPT, bootdelay); 237 #else 238 printf("Hit any key to stop autoboot: %2d ", bootdelay); 239 #endif 240 241 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 242 /* 243 * Check if key already pressed 244 * Don't check if bootdelay < 0 245 */ 246 if (bootdelay >= 0) { 247 if (tstc()) { /* we got a key press */ 248 (void) getc(); /* consume input */ 249 puts ("\b\b\b 0"); 250 abort = 1; /* don't auto boot */ 251 } 252 } 253 #endif 254 255 while ((bootdelay > 0) && (!abort)) { 256 int i; 257 258 --bootdelay; 259 /* delay 100 * 10ms */ 260 for (i=0; !abort && i<100; ++i) { 261 if (tstc()) { /* we got a key press */ 262 abort = 1; /* don't auto boot */ 263 bootdelay = 0; /* no more delay */ 264 # ifdef CONFIG_MENUKEY 265 menukey = getc(); 266 # else 267 (void) getc(); /* consume input */ 268 # endif 269 break; 270 } 271 udelay (10000); 272 } 273 274 printf ("\b\b\b%2d ", bootdelay); 275 } 276 277 putc ('\n'); 278 279 #ifdef CONFIG_SILENT_CONSOLE 280 { 281 DECLARE_GLOBAL_DATA_PTR; 282 283 if (abort) { 284 /* permanently enable normal console output */ 285 gd->flags &= ~(GD_FLG_SILENT); 286 } else if (gd->flags & GD_FLG_SILENT) { 287 /* Restore silent console */ 288 console_assign (stdout, "nulldev"); 289 console_assign (stderr, "nulldev"); 290 } 291 } 292 #endif 293 294 return abort; 295 } 296 # endif /* CONFIG_AUTOBOOT_KEYED */ 297 #endif /* CONFIG_BOOTDELAY >= 0 */ 298 299 /****************************************************************************/ 300 301 void main_loop (void) 302 { 303 #ifndef CFG_HUSH_PARSER 304 static char lastcommand[CFG_CBSIZE] = { 0, }; 305 int len; 306 int rc = 1; 307 int flag; 308 #endif 309 310 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 311 char *s; 312 int bootdelay; 313 #endif 314 #ifdef CONFIG_PREBOOT 315 char *p; 316 #endif 317 #ifdef CONFIG_BOOTCOUNT_LIMIT 318 unsigned long bootcount = 0; 319 unsigned long bootlimit = 0; 320 char *bcs; 321 char bcs_set[16]; 322 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 323 324 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 325 ulong bmp = 0; /* default bitmap */ 326 extern int trab_vfd (ulong bitmap); 327 328 #ifdef CONFIG_MODEM_SUPPORT 329 if (do_mdm_init) 330 bmp = 1; /* alternate bitmap */ 331 #endif 332 trab_vfd (bmp); 333 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 334 335 #ifdef CONFIG_BOOTCOUNT_LIMIT 336 bootcount = bootcount_load(); 337 bootcount++; 338 bootcount_store (bootcount); 339 sprintf (bcs_set, "%lu", bootcount); 340 setenv ("bootcount", bcs_set); 341 bcs = getenv ("bootlimit"); 342 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 343 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 344 345 #ifdef CONFIG_MODEM_SUPPORT 346 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 347 if (do_mdm_init) { 348 uchar *str = strdup(getenv("mdm_cmd")); 349 setenv ("preboot", str); /* set or delete definition */ 350 if (str != NULL) 351 free (str); 352 mdm_init(); /* wait for modem connection */ 353 } 354 #endif /* CONFIG_MODEM_SUPPORT */ 355 356 #ifdef CONFIG_VERSION_VARIABLE 357 { 358 extern char version_string[]; 359 360 setenv ("ver", version_string); /* set version variable */ 361 } 362 #endif /* CONFIG_VERSION_VARIABLE */ 363 364 #ifdef CFG_HUSH_PARSER 365 u_boot_hush_start (); 366 #endif 367 368 #ifdef CONFIG_PREBOOT 369 if ((p = getenv ("preboot")) != NULL) { 370 # ifdef CONFIG_AUTOBOOT_KEYED 371 int prev = disable_ctrlc(1); /* disable Control C checking */ 372 # endif 373 374 # ifndef CFG_HUSH_PARSER 375 run_command (p, 0); 376 # else 377 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 378 FLAG_EXIT_FROM_LOOP); 379 # endif 380 381 # ifdef CONFIG_AUTOBOOT_KEYED 382 disable_ctrlc(prev); /* restore Control C checking */ 383 # endif 384 } 385 #endif /* CONFIG_PREBOOT */ 386 387 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 388 s = getenv ("bootdelay"); 389 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 390 391 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 392 393 # ifdef CONFIG_BOOT_RETRY_TIME 394 init_cmd_timeout (); 395 # endif /* CONFIG_BOOT_RETRY_TIME */ 396 397 #ifdef CONFIG_BOOTCOUNT_LIMIT 398 if (bootlimit && (bootcount > bootlimit)) { 399 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 400 (unsigned)bootlimit); 401 s = getenv ("altbootcmd"); 402 } 403 else 404 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 405 s = getenv ("bootcmd"); 406 407 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 408 409 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 410 # ifdef CONFIG_AUTOBOOT_KEYED 411 int prev = disable_ctrlc(1); /* disable Control C checking */ 412 # endif 413 414 # ifndef CFG_HUSH_PARSER 415 run_command (s, 0); 416 # else 417 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 418 FLAG_EXIT_FROM_LOOP); 419 # endif 420 421 # ifdef CONFIG_AUTOBOOT_KEYED 422 disable_ctrlc(prev); /* restore Control C checking */ 423 # endif 424 } 425 426 # ifdef CONFIG_MENUKEY 427 if (menukey == CONFIG_MENUKEY) { 428 s = getenv("menucmd"); 429 if (s) { 430 # ifndef CFG_HUSH_PARSER 431 run_command (s, bd, 0); 432 # else 433 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 434 FLAG_EXIT_FROM_LOOP); 435 # endif 436 } 437 } 438 #endif /* CONFIG_MENUKEY */ 439 #endif /* CONFIG_BOOTDELAY */ 440 441 #ifdef CONFIG_AMIGAONEG3SE 442 { 443 extern void video_banner(void); 444 video_banner(); 445 } 446 #endif 447 448 /* 449 * Main Loop for Monitor Command Processing 450 */ 451 #ifdef CFG_HUSH_PARSER 452 parse_file_outer(); 453 /* This point is never reached */ 454 for (;;); 455 #else 456 for (;;) { 457 #ifdef CONFIG_BOOT_RETRY_TIME 458 if (rc >= 0) { 459 /* Saw enough of a valid command to 460 * restart the timeout. 461 */ 462 reset_cmd_timeout(); 463 } 464 #endif 465 len = readline (CFG_PROMPT); 466 467 flag = 0; /* assume no special flags for now */ 468 if (len > 0) 469 strcpy (lastcommand, console_buffer); 470 else if (len == 0) 471 flag |= CMD_FLAG_REPEAT; 472 #ifdef CONFIG_BOOT_RETRY_TIME 473 else if (len == -2) { 474 /* -2 means timed out, retry autoboot 475 */ 476 puts ("\nTimed out waiting for command\n"); 477 # ifdef CONFIG_RESET_TO_RETRY 478 /* Reinit board to run initialization code again */ 479 do_reset (NULL, 0, 0, NULL); 480 # else 481 return; /* retry autoboot */ 482 # endif 483 } 484 #endif 485 486 if (len == -1) 487 puts ("<INTERRUPT>\n"); 488 else 489 rc = run_command (lastcommand, flag); 490 491 if (rc <= 0) { 492 /* invalid command or not repeatable, forget it */ 493 lastcommand[0] = 0; 494 } 495 } 496 #endif /*CFG_HUSH_PARSER*/ 497 } 498 499 #ifdef CONFIG_BOOT_RETRY_TIME 500 /*************************************************************************** 501 * initialise command line timeout 502 */ 503 void init_cmd_timeout(void) 504 { 505 char *s = getenv ("bootretry"); 506 507 if (s != NULL) 508 retry_time = (int)simple_strtol(s, NULL, 10); 509 else 510 retry_time = CONFIG_BOOT_RETRY_TIME; 511 512 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 513 retry_time = CONFIG_BOOT_RETRY_MIN; 514 } 515 516 /*************************************************************************** 517 * reset command line timeout to retry_time seconds 518 */ 519 void reset_cmd_timeout(void) 520 { 521 endtime = endtick(retry_time); 522 } 523 #endif 524 525 /****************************************************************************/ 526 527 /* 528 * Prompt for input and read a line. 529 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 530 * time out when time goes past endtime (timebase time in ticks). 531 * Return: number of read characters 532 * -1 if break 533 * -2 if timed out 534 */ 535 int readline (const char *const prompt) 536 { 537 char *p = console_buffer; 538 int n = 0; /* buffer index */ 539 int plen = 0; /* prompt length */ 540 int col; /* output column cnt */ 541 char c; 542 543 /* print prompt */ 544 if (prompt) { 545 plen = strlen (prompt); 546 puts (prompt); 547 } 548 col = plen; 549 550 for (;;) { 551 #ifdef CONFIG_BOOT_RETRY_TIME 552 while (!tstc()) { /* while no incoming data */ 553 if (retry_time >= 0 && get_ticks() > endtime) 554 return (-2); /* timed out */ 555 } 556 #endif 557 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 558 559 #ifdef CONFIG_SHOW_ACTIVITY 560 while (!tstc()) { 561 extern void show_activity(int arg); 562 show_activity(0); 563 } 564 #endif 565 c = getc(); 566 567 /* 568 * Special character handling 569 */ 570 switch (c) { 571 case '\r': /* Enter */ 572 case '\n': 573 *p = '\0'; 574 puts ("\r\n"); 575 return (p - console_buffer); 576 577 case '\0': /* nul */ 578 continue; 579 580 case 0x03: /* ^C - break */ 581 console_buffer[0] = '\0'; /* discard input */ 582 return (-1); 583 584 case 0x15: /* ^U - erase line */ 585 while (col > plen) { 586 puts (erase_seq); 587 --col; 588 } 589 p = console_buffer; 590 n = 0; 591 continue; 592 593 case 0x17: /* ^W - erase word */ 594 p=delete_char(console_buffer, p, &col, &n, plen); 595 while ((n > 0) && (*p != ' ')) { 596 p=delete_char(console_buffer, p, &col, &n, plen); 597 } 598 continue; 599 600 case 0x08: /* ^H - backspace */ 601 case 0x7F: /* DEL - backspace */ 602 p=delete_char(console_buffer, p, &col, &n, plen); 603 continue; 604 605 default: 606 /* 607 * Must be a normal character then 608 */ 609 if (n < CFG_CBSIZE-2) { 610 if (c == '\t') { /* expand TABs */ 611 puts (tab_seq+(col&07)); 612 col += 8 - (col&07); 613 } else { 614 ++col; /* echo input */ 615 putc (c); 616 } 617 *p++ = c; 618 ++n; 619 } else { /* Buffer full */ 620 putc ('\a'); 621 } 622 } 623 } 624 } 625 626 /****************************************************************************/ 627 628 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 629 { 630 char *s; 631 632 if (*np == 0) { 633 return (p); 634 } 635 636 if (*(--p) == '\t') { /* will retype the whole line */ 637 while (*colp > plen) { 638 puts (erase_seq); 639 (*colp)--; 640 } 641 for (s=buffer; s<p; ++s) { 642 if (*s == '\t') { 643 puts (tab_seq+((*colp) & 07)); 644 *colp += 8 - ((*colp) & 07); 645 } else { 646 ++(*colp); 647 putc (*s); 648 } 649 } 650 } else { 651 puts (erase_seq); 652 (*colp)--; 653 } 654 (*np)--; 655 return (p); 656 } 657 658 /****************************************************************************/ 659 660 int parse_line (char *line, char *argv[]) 661 { 662 int nargs = 0; 663 664 #ifdef DEBUG_PARSER 665 printf ("parse_line: \"%s\"\n", line); 666 #endif 667 while (nargs < CFG_MAXARGS) { 668 669 /* skip any white space */ 670 while ((*line == ' ') || (*line == '\t')) { 671 ++line; 672 } 673 674 if (*line == '\0') { /* end of line, no more args */ 675 argv[nargs] = NULL; 676 #ifdef DEBUG_PARSER 677 printf ("parse_line: nargs=%d\n", nargs); 678 #endif 679 return (nargs); 680 } 681 682 argv[nargs++] = line; /* begin of argument string */ 683 684 /* find end of string */ 685 while (*line && (*line != ' ') && (*line != '\t')) { 686 ++line; 687 } 688 689 if (*line == '\0') { /* end of line, no more args */ 690 argv[nargs] = NULL; 691 #ifdef DEBUG_PARSER 692 printf ("parse_line: nargs=%d\n", nargs); 693 #endif 694 return (nargs); 695 } 696 697 *line++ = '\0'; /* terminate current arg */ 698 } 699 700 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 701 702 #ifdef DEBUG_PARSER 703 printf ("parse_line: nargs=%d\n", nargs); 704 #endif 705 return (nargs); 706 } 707 708 /****************************************************************************/ 709 710 static void process_macros (const char *input, char *output) 711 { 712 char c, prev; 713 const char *varname_start = NULL; 714 int inputcnt = strlen (input); 715 int outputcnt = CFG_CBSIZE; 716 int state = 0; /* 0 = waiting for '$' */ 717 /* 1 = waiting for '(' */ 718 /* 2 = waiting for ')' */ 719 /* 3 = waiting for ''' */ 720 #ifdef DEBUG_PARSER 721 char *output_start = output; 722 723 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input); 724 #endif 725 726 prev = '\0'; /* previous character */ 727 728 while (inputcnt && outputcnt) { 729 c = *input++; 730 inputcnt--; 731 732 if (state!=3) { 733 /* remove one level of escape characters */ 734 if ((c == '\\') && (prev != '\\')) { 735 if (inputcnt-- == 0) 736 break; 737 prev = c; 738 c = *input++; 739 } 740 } 741 742 switch (state) { 743 case 0: /* Waiting for (unescaped) $ */ 744 if ((c == '\'') && (prev != '\\')) { 745 state = 3; 746 break; 747 } 748 if ((c == '$') && (prev != '\\')) { 749 state++; 750 } else { 751 *(output++) = c; 752 outputcnt--; 753 } 754 break; 755 case 1: /* Waiting for ( */ 756 if (c == '(') { 757 state++; 758 varname_start = input; 759 } else { 760 state = 0; 761 *(output++) = '$'; 762 outputcnt--; 763 764 if (outputcnt) { 765 *(output++) = c; 766 outputcnt--; 767 } 768 } 769 break; 770 case 2: /* Waiting for ) */ 771 if (c == ')') { 772 int i; 773 char envname[CFG_CBSIZE], *envval; 774 int envcnt = input-varname_start-1; /* Varname # of chars */ 775 776 /* Get the varname */ 777 for (i = 0; i < envcnt; i++) { 778 envname[i] = varname_start[i]; 779 } 780 envname[i] = 0; 781 782 /* Get its value */ 783 envval = getenv (envname); 784 785 /* Copy into the line if it exists */ 786 if (envval != NULL) 787 while ((*envval) && outputcnt) { 788 *(output++) = *(envval++); 789 outputcnt--; 790 } 791 /* Look for another '$' */ 792 state = 0; 793 } 794 break; 795 case 3: /* Waiting for ' */ 796 if ((c == '\'') && (prev != '\\')) { 797 state = 0; 798 } else { 799 *(output++) = c; 800 outputcnt--; 801 } 802 break; 803 } 804 prev = c; 805 } 806 807 if (outputcnt) 808 *output = 0; 809 810 #ifdef DEBUG_PARSER 811 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 812 strlen(output_start), output_start); 813 #endif 814 } 815 816 /**************************************************************************** 817 * returns: 818 * 1 - command executed, repeatable 819 * 0 - command executed but not repeatable, interrupted commands are 820 * always considered not repeatable 821 * -1 - not executed (unrecognized, bootd recursion or too many args) 822 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 823 * considered unrecognized) 824 * 825 * WARNING: 826 * 827 * We must create a temporary copy of the command since the command we get 828 * may be the result from getenv(), which returns a pointer directly to 829 * the environment data, which may change magicly when the command we run 830 * creates or modifies environment variables (like "bootp" does). 831 */ 832 833 int run_command (const char *cmd, int flag) 834 { 835 cmd_tbl_t *cmdtp; 836 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 837 char *token; /* start of token in cmdbuf */ 838 char *sep; /* end of token (separator) in cmdbuf */ 839 char finaltoken[CFG_CBSIZE]; 840 char *str = cmdbuf; 841 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 842 int argc, inquotes; 843 int repeatable = 1; 844 int rc = 0; 845 846 #ifdef DEBUG_PARSER 847 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 848 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 849 puts ("\"\n"); 850 #endif 851 852 clear_ctrlc(); /* forget any previous Control C */ 853 854 if (!cmd || !*cmd) { 855 return -1; /* empty command */ 856 } 857 858 if (strlen(cmd) >= CFG_CBSIZE) { 859 puts ("## Command too long!\n"); 860 return -1; 861 } 862 863 strcpy (cmdbuf, cmd); 864 865 /* Process separators and check for invalid 866 * repeatable commands 867 */ 868 869 #ifdef DEBUG_PARSER 870 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 871 #endif 872 while (*str) { 873 874 /* 875 * Find separator, or string end 876 * Allow simple escape of ';' by writing "\;" 877 */ 878 for (inquotes = 0, sep = str; *sep; sep++) { 879 if ((*sep=='\'') && 880 (*(sep-1) != '\\')) 881 inquotes=!inquotes; 882 883 if (!inquotes && 884 (*sep == ';') && /* separator */ 885 ( sep != str) && /* past string start */ 886 (*(sep-1) != '\\')) /* and NOT escaped */ 887 break; 888 } 889 890 /* 891 * Limit the token to data between separators 892 */ 893 token = str; 894 if (*sep) { 895 str = sep + 1; /* start of command for next pass */ 896 *sep = '\0'; 897 } 898 else 899 str = sep; /* no more commands for next pass */ 900 #ifdef DEBUG_PARSER 901 printf ("token: \"%s\"\n", token); 902 #endif 903 904 /* find macros in this token and replace them */ 905 process_macros (token, finaltoken); 906 907 /* Extract arguments */ 908 argc = parse_line (finaltoken, argv); 909 910 /* Look up command in command table */ 911 if ((cmdtp = find_cmd(argv[0])) == NULL) { 912 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 913 rc = -1; /* give up after bad command */ 914 continue; 915 } 916 917 /* found - check max args */ 918 if (argc > cmdtp->maxargs) { 919 printf ("Usage:\n%s\n", cmdtp->usage); 920 rc = -1; 921 continue; 922 } 923 924 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 925 /* avoid "bootd" recursion */ 926 if (cmdtp->cmd == do_bootd) { 927 #ifdef DEBUG_PARSER 928 printf ("[%s]\n", finaltoken); 929 #endif 930 if (flag & CMD_FLAG_BOOTD) { 931 puts ("'bootd' recursion detected\n"); 932 rc = -1; 933 continue; 934 } 935 else 936 flag |= CMD_FLAG_BOOTD; 937 } 938 #endif /* CFG_CMD_BOOTD */ 939 940 /* OK - call function to do the command */ 941 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 942 rc = -1; 943 } 944 945 repeatable &= cmdtp->repeatable; 946 947 /* Did the user stop this? */ 948 if (had_ctrlc ()) 949 return 0; /* if stopped then not repeatable */ 950 } 951 952 return rc ? rc : repeatable; 953 } 954 955 /****************************************************************************/ 956 957 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 958 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 959 { 960 int i; 961 962 if (argc < 2) { 963 printf ("Usage:\n%s\n", cmdtp->usage); 964 return 1; 965 } 966 967 for (i=1; i<argc; ++i) { 968 char *arg; 969 970 if ((arg = getenv (argv[i])) == NULL) { 971 printf ("## Error: \"%s\" not defined\n", argv[i]); 972 return 1; 973 } 974 #ifndef CFG_HUSH_PARSER 975 if (run_command (arg, flag) == -1) 976 return 1; 977 #else 978 if (parse_string_outer(arg, 979 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 980 return 1; 981 #endif 982 } 983 return 0; 984 } 985 #endif /* CFG_CMD_RUN */ 986