1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * Add to readline cmdline-editing by 6 * (C) Copyright 2005 7 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com> 8 * 9 * See file CREDITS for list of people who contributed to this 10 * project. 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License as 14 * published by the Free Software Foundation; either version 2 of 15 * the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 25 * MA 02111-1307 USA 26 */ 27 28 /* #define DEBUG */ 29 30 #include <common.h> 31 #include <watchdog.h> 32 #include <command.h> 33 #ifdef CONFIG_MODEM_SUPPORT 34 #include <malloc.h> /* for free() prototype */ 35 #endif 36 37 #ifdef CFG_HUSH_PARSER 38 #include <hush.h> 39 #endif 40 41 #include <post.h> 42 43 #ifdef CONFIG_SILENT_CONSOLE 44 DECLARE_GLOBAL_DATA_PTR; 45 #endif 46 47 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) 48 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */ 49 #endif 50 51 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 52 53 54 #define MAX_DELAY_STOP_STR 32 55 56 static int parse_line (char *, char *[]); 57 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 58 static int abortboot(int); 59 #endif 60 61 #undef DEBUG_PARSER 62 63 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */ 64 65 #ifndef CONFIG_CMDLINE_EDITING 66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 67 static char erase_seq[] = "\b \b"; /* erase sequence */ 68 static char tab_seq[] = " "; /* used to expand TABs */ 69 #endif /* CONFIG_CMDLINE_EDITING */ 70 71 #ifdef CONFIG_BOOT_RETRY_TIME 72 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 73 static int retry_time = -1; /* -1 so can call readline before main_loop */ 74 #endif 75 76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 77 78 #ifndef CONFIG_BOOT_RETRY_MIN 79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 80 #endif 81 82 #ifdef CONFIG_MODEM_SUPPORT 83 int do_mdm_init = 0; 84 extern void mdm_init(void); /* defined in board.c */ 85 #endif 86 87 /*************************************************************************** 88 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 89 * returns: 0 - no key string, allow autoboot 90 * 1 - got key string, abort 91 */ 92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 93 # if defined(CONFIG_AUTOBOOT_KEYED) 94 static __inline__ int abortboot(int bootdelay) 95 { 96 int abort = 0; 97 uint64_t etime = endtick(bootdelay); 98 struct { 99 char* str; 100 u_int len; 101 int retry; 102 } 103 delaykey [] = { 104 { str: getenv ("bootdelaykey"), retry: 1 }, 105 { str: getenv ("bootdelaykey2"), retry: 1 }, 106 { str: getenv ("bootstopkey"), retry: 0 }, 107 { str: getenv ("bootstopkey2"), retry: 0 }, 108 }; 109 110 char presskey [MAX_DELAY_STOP_STR]; 111 u_int presskey_len = 0; 112 u_int presskey_max = 0; 113 u_int i; 114 115 # ifdef CONFIG_AUTOBOOT_PROMPT 116 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay); 117 # endif 118 119 # ifdef CONFIG_AUTOBOOT_DELAY_STR 120 if (delaykey[0].str == NULL) 121 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 122 # endif 123 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 124 if (delaykey[1].str == NULL) 125 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 126 # endif 127 # ifdef CONFIG_AUTOBOOT_STOP_STR 128 if (delaykey[2].str == NULL) 129 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 130 # endif 131 # ifdef CONFIG_AUTOBOOT_STOP_STR2 132 if (delaykey[3].str == NULL) 133 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 134 # endif 135 136 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 137 delaykey[i].len = delaykey[i].str == NULL ? 138 0 : strlen (delaykey[i].str); 139 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 140 MAX_DELAY_STOP_STR : delaykey[i].len; 141 142 presskey_max = presskey_max > delaykey[i].len ? 143 presskey_max : delaykey[i].len; 144 145 # if DEBUG_BOOTKEYS 146 printf("%s key:<%s>\n", 147 delaykey[i].retry ? "delay" : "stop", 148 delaykey[i].str ? delaykey[i].str : "NULL"); 149 # endif 150 } 151 152 /* In order to keep up with incoming data, check timeout only 153 * when catch up. 154 */ 155 while (!abort && get_ticks() <= etime) { 156 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 157 if (delaykey[i].len > 0 && 158 presskey_len >= delaykey[i].len && 159 memcmp (presskey + presskey_len - delaykey[i].len, 160 delaykey[i].str, 161 delaykey[i].len) == 0) { 162 # if DEBUG_BOOTKEYS 163 printf("got %skey\n", 164 delaykey[i].retry ? "delay" : "stop"); 165 # endif 166 167 # ifdef CONFIG_BOOT_RETRY_TIME 168 /* don't retry auto boot */ 169 if (! delaykey[i].retry) 170 retry_time = -1; 171 # endif 172 abort = 1; 173 } 174 } 175 176 if (tstc()) { 177 if (presskey_len < presskey_max) { 178 presskey [presskey_len ++] = getc(); 179 } 180 else { 181 for (i = 0; i < presskey_max - 1; i ++) 182 presskey [i] = presskey [i + 1]; 183 184 presskey [i] = getc(); 185 } 186 } 187 } 188 # if DEBUG_BOOTKEYS 189 if (!abort) 190 puts ("key timeout\n"); 191 # endif 192 193 #ifdef CONFIG_SILENT_CONSOLE 194 if (abort) 195 gd->flags &= ~GD_FLG_SILENT; 196 #endif 197 198 return abort; 199 } 200 201 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 202 203 #ifdef CONFIG_MENUKEY 204 static int menukey = 0; 205 #endif 206 207 static __inline__ int abortboot(int bootdelay) 208 { 209 int abort = 0; 210 211 #ifdef CONFIG_MENUPROMPT 212 printf(CONFIG_MENUPROMPT, bootdelay); 213 #else 214 printf("Hit any key to stop autoboot: %2d ", bootdelay); 215 #endif 216 217 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 218 /* 219 * Check if key already pressed 220 * Don't check if bootdelay < 0 221 */ 222 if (bootdelay >= 0) { 223 if (tstc()) { /* we got a key press */ 224 (void) getc(); /* consume input */ 225 puts ("\b\b\b 0"); 226 abort = 1; /* don't auto boot */ 227 } 228 } 229 #endif 230 231 while ((bootdelay > 0) && (!abort)) { 232 int i; 233 234 --bootdelay; 235 /* delay 100 * 10ms */ 236 for (i=0; !abort && i<100; ++i) { 237 if (tstc()) { /* we got a key press */ 238 abort = 1; /* don't auto boot */ 239 bootdelay = 0; /* no more delay */ 240 # ifdef CONFIG_MENUKEY 241 menukey = getc(); 242 # else 243 (void) getc(); /* consume input */ 244 # endif 245 break; 246 } 247 udelay (10000); 248 } 249 250 printf ("\b\b\b%2d ", bootdelay); 251 } 252 253 putc ('\n'); 254 255 #ifdef CONFIG_SILENT_CONSOLE 256 if (abort) 257 gd->flags &= ~GD_FLG_SILENT; 258 #endif 259 260 return abort; 261 } 262 # endif /* CONFIG_AUTOBOOT_KEYED */ 263 #endif /* CONFIG_BOOTDELAY >= 0 */ 264 265 /****************************************************************************/ 266 267 void main_loop (void) 268 { 269 #ifndef CFG_HUSH_PARSER 270 static char lastcommand[CFG_CBSIZE] = { 0, }; 271 int len; 272 int rc = 1; 273 int flag; 274 #endif 275 276 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 277 char *s; 278 int bootdelay; 279 #endif 280 #ifdef CONFIG_PREBOOT 281 char *p; 282 #endif 283 #ifdef CONFIG_BOOTCOUNT_LIMIT 284 unsigned long bootcount = 0; 285 unsigned long bootlimit = 0; 286 char *bcs; 287 char bcs_set[16]; 288 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 289 290 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 291 ulong bmp = 0; /* default bitmap */ 292 extern int trab_vfd (ulong bitmap); 293 294 #ifdef CONFIG_MODEM_SUPPORT 295 if (do_mdm_init) 296 bmp = 1; /* alternate bitmap */ 297 #endif 298 trab_vfd (bmp); 299 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 300 301 #ifdef CONFIG_BOOTCOUNT_LIMIT 302 bootcount = bootcount_load(); 303 bootcount++; 304 bootcount_store (bootcount); 305 sprintf (bcs_set, "%lu", bootcount); 306 setenv ("bootcount", bcs_set); 307 bcs = getenv ("bootlimit"); 308 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 309 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 310 311 #ifdef CONFIG_MODEM_SUPPORT 312 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 313 if (do_mdm_init) { 314 char *str = strdup(getenv("mdm_cmd")); 315 setenv ("preboot", str); /* set or delete definition */ 316 if (str != NULL) 317 free (str); 318 mdm_init(); /* wait for modem connection */ 319 } 320 #endif /* CONFIG_MODEM_SUPPORT */ 321 322 #ifdef CONFIG_VERSION_VARIABLE 323 { 324 extern char version_string[]; 325 326 setenv ("ver", version_string); /* set version variable */ 327 } 328 #endif /* CONFIG_VERSION_VARIABLE */ 329 330 #ifdef CFG_HUSH_PARSER 331 u_boot_hush_start (); 332 #endif 333 334 #ifdef CONFIG_AUTO_COMPLETE 335 install_auto_complete(); 336 #endif 337 338 #ifdef CONFIG_PREBOOT 339 if ((p = getenv ("preboot")) != NULL) { 340 # ifdef CONFIG_AUTOBOOT_KEYED 341 int prev = disable_ctrlc(1); /* disable Control C checking */ 342 # endif 343 344 # ifndef CFG_HUSH_PARSER 345 run_command (p, 0); 346 # else 347 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 348 FLAG_EXIT_FROM_LOOP); 349 # endif 350 351 # ifdef CONFIG_AUTOBOOT_KEYED 352 disable_ctrlc(prev); /* restore Control C checking */ 353 # endif 354 } 355 #endif /* CONFIG_PREBOOT */ 356 357 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 358 s = getenv ("bootdelay"); 359 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 360 361 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 362 363 # ifdef CONFIG_BOOT_RETRY_TIME 364 init_cmd_timeout (); 365 # endif /* CONFIG_BOOT_RETRY_TIME */ 366 367 #ifdef CONFIG_BOOTCOUNT_LIMIT 368 if (bootlimit && (bootcount > bootlimit)) { 369 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 370 (unsigned)bootlimit); 371 s = getenv ("altbootcmd"); 372 } 373 else 374 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 375 s = getenv ("bootcmd"); 376 377 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 378 379 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 380 # ifdef CONFIG_AUTOBOOT_KEYED 381 int prev = disable_ctrlc(1); /* disable Control C checking */ 382 # endif 383 384 # ifndef CFG_HUSH_PARSER 385 run_command (s, 0); 386 # else 387 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 388 FLAG_EXIT_FROM_LOOP); 389 # endif 390 391 # ifdef CONFIG_AUTOBOOT_KEYED 392 disable_ctrlc(prev); /* restore Control C checking */ 393 # endif 394 } 395 396 # ifdef CONFIG_MENUKEY 397 if (menukey == CONFIG_MENUKEY) { 398 s = getenv("menucmd"); 399 if (s) { 400 # ifndef CFG_HUSH_PARSER 401 run_command (s, 0); 402 # else 403 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 404 FLAG_EXIT_FROM_LOOP); 405 # endif 406 } 407 } 408 #endif /* CONFIG_MENUKEY */ 409 #endif /* CONFIG_BOOTDELAY */ 410 411 #ifdef CONFIG_AMIGAONEG3SE 412 { 413 extern void video_banner(void); 414 video_banner(); 415 } 416 #endif 417 418 /* 419 * Main Loop for Monitor Command Processing 420 */ 421 #ifdef CFG_HUSH_PARSER 422 parse_file_outer(); 423 /* This point is never reached */ 424 for (;;); 425 #else 426 for (;;) { 427 #ifdef CONFIG_BOOT_RETRY_TIME 428 if (rc >= 0) { 429 /* Saw enough of a valid command to 430 * restart the timeout. 431 */ 432 reset_cmd_timeout(); 433 } 434 #endif 435 len = readline (CFG_PROMPT); 436 437 flag = 0; /* assume no special flags for now */ 438 if (len > 0) 439 strcpy (lastcommand, console_buffer); 440 else if (len == 0) 441 flag |= CMD_FLAG_REPEAT; 442 #ifdef CONFIG_BOOT_RETRY_TIME 443 else if (len == -2) { 444 /* -2 means timed out, retry autoboot 445 */ 446 puts ("\nTimed out waiting for command\n"); 447 # ifdef CONFIG_RESET_TO_RETRY 448 /* Reinit board to run initialization code again */ 449 do_reset (NULL, 0, 0, NULL); 450 # else 451 return; /* retry autoboot */ 452 # endif 453 } 454 #endif 455 456 if (len == -1) 457 puts ("<INTERRUPT>\n"); 458 else 459 rc = run_command (lastcommand, flag); 460 461 if (rc <= 0) { 462 /* invalid command or not repeatable, forget it */ 463 lastcommand[0] = 0; 464 } 465 } 466 #endif /*CFG_HUSH_PARSER*/ 467 } 468 469 #ifdef CONFIG_BOOT_RETRY_TIME 470 /*************************************************************************** 471 * initialize command line timeout 472 */ 473 void init_cmd_timeout(void) 474 { 475 char *s = getenv ("bootretry"); 476 477 if (s != NULL) 478 retry_time = (int)simple_strtol(s, NULL, 10); 479 else 480 retry_time = CONFIG_BOOT_RETRY_TIME; 481 482 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 483 retry_time = CONFIG_BOOT_RETRY_MIN; 484 } 485 486 /*************************************************************************** 487 * reset command line timeout to retry_time seconds 488 */ 489 void reset_cmd_timeout(void) 490 { 491 endtime = endtick(retry_time); 492 } 493 #endif 494 495 #ifdef CONFIG_CMDLINE_EDITING 496 497 /* 498 * cmdline-editing related codes from vivi. 499 * Author: Janghoon Lyu <nandy@mizi.com> 500 */ 501 502 #define putnstr(str,n) do { \ 503 printf ("%.*s", n, str); \ 504 } while (0) 505 506 #define CTL_CH(c) ((c) - 'a' + 1) 507 508 #define MAX_CMDBUF_SIZE 256 509 510 #define CTL_BACKSPACE ('\b') 511 #define DEL ((char)255) 512 #define DEL7 ((char)127) 513 #define CREAD_HIST_CHAR ('!') 514 515 #define getcmd_putch(ch) putc(ch) 516 #define getcmd_getch() getc() 517 #define getcmd_cbeep() getcmd_putch('\a') 518 519 #define HIST_MAX 20 520 #define HIST_SIZE MAX_CMDBUF_SIZE 521 522 static int hist_max = 0; 523 static int hist_add_idx = 0; 524 static int hist_cur = -1; 525 unsigned hist_num = 0; 526 527 char* hist_list[HIST_MAX]; 528 char hist_lines[HIST_MAX][HIST_SIZE]; 529 530 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 531 532 static void hist_init(void) 533 { 534 int i; 535 536 hist_max = 0; 537 hist_add_idx = 0; 538 hist_cur = -1; 539 hist_num = 0; 540 541 for (i = 0; i < HIST_MAX; i++) { 542 hist_list[i] = hist_lines[i]; 543 hist_list[i][0] = '\0'; 544 } 545 } 546 547 static void cread_add_to_hist(char *line) 548 { 549 strcpy(hist_list[hist_add_idx], line); 550 551 if (++hist_add_idx >= HIST_MAX) 552 hist_add_idx = 0; 553 554 if (hist_add_idx > hist_max) 555 hist_max = hist_add_idx; 556 557 hist_num++; 558 } 559 560 static char* hist_prev(void) 561 { 562 char *ret; 563 int old_cur; 564 565 if (hist_cur < 0) 566 return NULL; 567 568 old_cur = hist_cur; 569 if (--hist_cur < 0) 570 hist_cur = hist_max; 571 572 if (hist_cur == hist_add_idx) { 573 hist_cur = old_cur; 574 ret = NULL; 575 } else 576 ret = hist_list[hist_cur]; 577 578 return (ret); 579 } 580 581 static char* hist_next(void) 582 { 583 char *ret; 584 585 if (hist_cur < 0) 586 return NULL; 587 588 if (hist_cur == hist_add_idx) 589 return NULL; 590 591 if (++hist_cur > hist_max) 592 hist_cur = 0; 593 594 if (hist_cur == hist_add_idx) { 595 ret = ""; 596 } else 597 ret = hist_list[hist_cur]; 598 599 return (ret); 600 } 601 602 #ifndef CONFIG_CMDLINE_EDITING 603 static void cread_print_hist_list(void) 604 { 605 int i; 606 unsigned long n; 607 608 n = hist_num - hist_max; 609 610 i = hist_add_idx + 1; 611 while (1) { 612 if (i > hist_max) 613 i = 0; 614 if (i == hist_add_idx) 615 break; 616 printf("%s\n", hist_list[i]); 617 n++; 618 i++; 619 } 620 } 621 #endif /* CONFIG_CMDLINE_EDITING */ 622 623 #define BEGINNING_OF_LINE() { \ 624 while (num) { \ 625 getcmd_putch(CTL_BACKSPACE); \ 626 num--; \ 627 } \ 628 } 629 630 #define ERASE_TO_EOL() { \ 631 if (num < eol_num) { \ 632 int tmp; \ 633 for (tmp = num; tmp < eol_num; tmp++) \ 634 getcmd_putch(' '); \ 635 while (tmp-- > num) \ 636 getcmd_putch(CTL_BACKSPACE); \ 637 eol_num = num; \ 638 } \ 639 } 640 641 #define REFRESH_TO_EOL() { \ 642 if (num < eol_num) { \ 643 wlen = eol_num - num; \ 644 putnstr(buf + num, wlen); \ 645 num = eol_num; \ 646 } \ 647 } 648 649 static void cread_add_char(char ichar, int insert, unsigned long *num, 650 unsigned long *eol_num, char *buf, unsigned long len) 651 { 652 unsigned long wlen; 653 654 /* room ??? */ 655 if (insert || *num == *eol_num) { 656 if (*eol_num > len - 1) { 657 getcmd_cbeep(); 658 return; 659 } 660 (*eol_num)++; 661 } 662 663 if (insert) { 664 wlen = *eol_num - *num; 665 if (wlen > 1) { 666 memmove(&buf[*num+1], &buf[*num], wlen-1); 667 } 668 669 buf[*num] = ichar; 670 putnstr(buf + *num, wlen); 671 (*num)++; 672 while (--wlen) { 673 getcmd_putch(CTL_BACKSPACE); 674 } 675 } else { 676 /* echo the character */ 677 wlen = 1; 678 buf[*num] = ichar; 679 putnstr(buf + *num, wlen); 680 (*num)++; 681 } 682 } 683 684 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 685 unsigned long *eol_num, char *buf, unsigned long len) 686 { 687 while (strsize--) { 688 cread_add_char(*str, insert, num, eol_num, buf, len); 689 str++; 690 } 691 } 692 693 static int cread_line(char *buf, unsigned int *len) 694 { 695 unsigned long num = 0; 696 unsigned long eol_num = 0; 697 unsigned long rlen; 698 unsigned long wlen; 699 char ichar; 700 int insert = 1; 701 int esc_len = 0; 702 int rc = 0; 703 char esc_save[8]; 704 705 while (1) { 706 rlen = 1; 707 ichar = getcmd_getch(); 708 709 if ((ichar == '\n') || (ichar == '\r')) { 710 putc('\n'); 711 break; 712 } 713 714 /* 715 * handle standard linux xterm esc sequences for arrow key, etc. 716 */ 717 if (esc_len != 0) { 718 if (esc_len == 1) { 719 if (ichar == '[') { 720 esc_save[esc_len] = ichar; 721 esc_len = 2; 722 } else { 723 cread_add_str(esc_save, esc_len, insert, 724 &num, &eol_num, buf, *len); 725 esc_len = 0; 726 } 727 continue; 728 } 729 730 switch (ichar) { 731 732 case 'D': /* <- key */ 733 ichar = CTL_CH('b'); 734 esc_len = 0; 735 break; 736 case 'C': /* -> key */ 737 ichar = CTL_CH('f'); 738 esc_len = 0; 739 break; /* pass off to ^F handler */ 740 case 'H': /* Home key */ 741 ichar = CTL_CH('a'); 742 esc_len = 0; 743 break; /* pass off to ^A handler */ 744 case 'A': /* up arrow */ 745 ichar = CTL_CH('p'); 746 esc_len = 0; 747 break; /* pass off to ^P handler */ 748 case 'B': /* down arrow */ 749 ichar = CTL_CH('n'); 750 esc_len = 0; 751 break; /* pass off to ^N handler */ 752 default: 753 esc_save[esc_len++] = ichar; 754 cread_add_str(esc_save, esc_len, insert, 755 &num, &eol_num, buf, *len); 756 esc_len = 0; 757 continue; 758 } 759 } 760 761 switch (ichar) { 762 case 0x1b: 763 if (esc_len == 0) { 764 esc_save[esc_len] = ichar; 765 esc_len = 1; 766 } else { 767 puts("impossible condition #876\n"); 768 esc_len = 0; 769 } 770 break; 771 772 case CTL_CH('a'): 773 BEGINNING_OF_LINE(); 774 break; 775 case CTL_CH('c'): /* ^C - break */ 776 *buf = '\0'; /* discard input */ 777 return (-1); 778 case CTL_CH('f'): 779 if (num < eol_num) { 780 getcmd_putch(buf[num]); 781 num++; 782 } 783 break; 784 case CTL_CH('b'): 785 if (num) { 786 getcmd_putch(CTL_BACKSPACE); 787 num--; 788 } 789 break; 790 case CTL_CH('d'): 791 if (num < eol_num) { 792 wlen = eol_num - num - 1; 793 if (wlen) { 794 memmove(&buf[num], &buf[num+1], wlen); 795 putnstr(buf + num, wlen); 796 } 797 798 getcmd_putch(' '); 799 do { 800 getcmd_putch(CTL_BACKSPACE); 801 } while (wlen--); 802 eol_num--; 803 } 804 break; 805 case CTL_CH('k'): 806 ERASE_TO_EOL(); 807 break; 808 case CTL_CH('e'): 809 REFRESH_TO_EOL(); 810 break; 811 case CTL_CH('o'): 812 insert = !insert; 813 break; 814 case CTL_CH('x'): 815 BEGINNING_OF_LINE(); 816 ERASE_TO_EOL(); 817 break; 818 case DEL: 819 case DEL7: 820 case 8: 821 if (num) { 822 wlen = eol_num - num; 823 num--; 824 memmove(&buf[num], &buf[num+1], wlen); 825 getcmd_putch(CTL_BACKSPACE); 826 putnstr(buf + num, wlen); 827 getcmd_putch(' '); 828 do { 829 getcmd_putch(CTL_BACKSPACE); 830 } while (wlen--); 831 eol_num--; 832 } 833 break; 834 case CTL_CH('p'): 835 case CTL_CH('n'): 836 { 837 char * hline; 838 839 esc_len = 0; 840 841 if (ichar == CTL_CH('p')) 842 hline = hist_prev(); 843 else 844 hline = hist_next(); 845 846 if (!hline) { 847 getcmd_cbeep(); 848 continue; 849 } 850 851 /* nuke the current line */ 852 /* first, go home */ 853 BEGINNING_OF_LINE(); 854 855 /* erase to end of line */ 856 ERASE_TO_EOL(); 857 858 /* copy new line into place and display */ 859 strcpy(buf, hline); 860 eol_num = strlen(buf); 861 REFRESH_TO_EOL(); 862 continue; 863 } 864 default: 865 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 866 break; 867 } 868 } 869 *len = eol_num; 870 buf[eol_num] = '\0'; /* lose the newline */ 871 872 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 873 cread_add_to_hist(buf); 874 hist_cur = hist_add_idx; 875 876 return (rc); 877 } 878 879 #endif /* CONFIG_CMDLINE_EDITING */ 880 881 /****************************************************************************/ 882 883 /* 884 * Prompt for input and read a line. 885 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 886 * time out when time goes past endtime (timebase time in ticks). 887 * Return: number of read characters 888 * -1 if break 889 * -2 if timed out 890 */ 891 int readline (const char *const prompt) 892 { 893 #ifdef CONFIG_CMDLINE_EDITING 894 char *p = console_buffer; 895 unsigned int len=MAX_CMDBUF_SIZE; 896 int rc; 897 static int initted = 0; 898 899 if (!initted) { 900 hist_init(); 901 initted = 1; 902 } 903 904 puts (prompt); 905 906 rc = cread_line(p, &len); 907 return rc < 0 ? rc : len; 908 #else 909 char *p = console_buffer; 910 int n = 0; /* buffer index */ 911 int plen = 0; /* prompt length */ 912 int col; /* output column cnt */ 913 char c; 914 915 /* print prompt */ 916 if (prompt) { 917 plen = strlen (prompt); 918 puts (prompt); 919 } 920 col = plen; 921 922 for (;;) { 923 #ifdef CONFIG_BOOT_RETRY_TIME 924 while (!tstc()) { /* while no incoming data */ 925 if (retry_time >= 0 && get_ticks() > endtime) 926 return (-2); /* timed out */ 927 } 928 #endif 929 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 930 931 #ifdef CONFIG_SHOW_ACTIVITY 932 while (!tstc()) { 933 extern void show_activity(int arg); 934 show_activity(0); 935 } 936 #endif 937 c = getc(); 938 939 /* 940 * Special character handling 941 */ 942 switch (c) { 943 case '\r': /* Enter */ 944 case '\n': 945 *p = '\0'; 946 puts ("\r\n"); 947 return (p - console_buffer); 948 949 case '\0': /* nul */ 950 continue; 951 952 case 0x03: /* ^C - break */ 953 console_buffer[0] = '\0'; /* discard input */ 954 return (-1); 955 956 case 0x15: /* ^U - erase line */ 957 while (col > plen) { 958 puts (erase_seq); 959 --col; 960 } 961 p = console_buffer; 962 n = 0; 963 continue; 964 965 case 0x17: /* ^W - erase word */ 966 p=delete_char(console_buffer, p, &col, &n, plen); 967 while ((n > 0) && (*p != ' ')) { 968 p=delete_char(console_buffer, p, &col, &n, plen); 969 } 970 continue; 971 972 case 0x08: /* ^H - backspace */ 973 case 0x7F: /* DEL - backspace */ 974 p=delete_char(console_buffer, p, &col, &n, plen); 975 continue; 976 977 default: 978 /* 979 * Must be a normal character then 980 */ 981 if (n < CFG_CBSIZE-2) { 982 if (c == '\t') { /* expand TABs */ 983 #ifdef CONFIG_AUTO_COMPLETE 984 /* if auto completion triggered just continue */ 985 *p = '\0'; 986 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 987 p = console_buffer + n; /* reset */ 988 continue; 989 } 990 #endif 991 puts (tab_seq+(col&07)); 992 col += 8 - (col&07); 993 } else { 994 ++col; /* echo input */ 995 putc (c); 996 } 997 *p++ = c; 998 ++n; 999 } else { /* Buffer full */ 1000 putc ('\a'); 1001 } 1002 } 1003 } 1004 #endif /* CONFIG_CMDLINE_EDITING */ 1005 } 1006 1007 /****************************************************************************/ 1008 1009 #ifndef CONFIG_CMDLINE_EDITING 1010 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1011 { 1012 char *s; 1013 1014 if (*np == 0) { 1015 return (p); 1016 } 1017 1018 if (*(--p) == '\t') { /* will retype the whole line */ 1019 while (*colp > plen) { 1020 puts (erase_seq); 1021 (*colp)--; 1022 } 1023 for (s=buffer; s<p; ++s) { 1024 if (*s == '\t') { 1025 puts (tab_seq+((*colp) & 07)); 1026 *colp += 8 - ((*colp) & 07); 1027 } else { 1028 ++(*colp); 1029 putc (*s); 1030 } 1031 } 1032 } else { 1033 puts (erase_seq); 1034 (*colp)--; 1035 } 1036 (*np)--; 1037 return (p); 1038 } 1039 #endif /* CONFIG_CMDLINE_EDITING */ 1040 1041 /****************************************************************************/ 1042 1043 int parse_line (char *line, char *argv[]) 1044 { 1045 int nargs = 0; 1046 1047 #ifdef DEBUG_PARSER 1048 printf ("parse_line: \"%s\"\n", line); 1049 #endif 1050 while (nargs < CFG_MAXARGS) { 1051 1052 /* skip any white space */ 1053 while ((*line == ' ') || (*line == '\t')) { 1054 ++line; 1055 } 1056 1057 if (*line == '\0') { /* end of line, no more args */ 1058 argv[nargs] = NULL; 1059 #ifdef DEBUG_PARSER 1060 printf ("parse_line: nargs=%d\n", nargs); 1061 #endif 1062 return (nargs); 1063 } 1064 1065 argv[nargs++] = line; /* begin of argument string */ 1066 1067 /* find end of string */ 1068 while (*line && (*line != ' ') && (*line != '\t')) { 1069 ++line; 1070 } 1071 1072 if (*line == '\0') { /* end of line, no more args */ 1073 argv[nargs] = NULL; 1074 #ifdef DEBUG_PARSER 1075 printf ("parse_line: nargs=%d\n", nargs); 1076 #endif 1077 return (nargs); 1078 } 1079 1080 *line++ = '\0'; /* terminate current arg */ 1081 } 1082 1083 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 1084 1085 #ifdef DEBUG_PARSER 1086 printf ("parse_line: nargs=%d\n", nargs); 1087 #endif 1088 return (nargs); 1089 } 1090 1091 /****************************************************************************/ 1092 1093 static void process_macros (const char *input, char *output) 1094 { 1095 char c, prev; 1096 const char *varname_start = NULL; 1097 int inputcnt = strlen (input); 1098 int outputcnt = CFG_CBSIZE; 1099 int state = 0; /* 0 = waiting for '$' */ 1100 1101 /* 1 = waiting for '(' or '{' */ 1102 /* 2 = waiting for ')' or '}' */ 1103 /* 3 = waiting for ''' */ 1104 #ifdef DEBUG_PARSER 1105 char *output_start = output; 1106 1107 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1108 input); 1109 #endif 1110 1111 prev = '\0'; /* previous character */ 1112 1113 while (inputcnt && outputcnt) { 1114 c = *input++; 1115 inputcnt--; 1116 1117 if (state != 3) { 1118 /* remove one level of escape characters */ 1119 if ((c == '\\') && (prev != '\\')) { 1120 if (inputcnt-- == 0) 1121 break; 1122 prev = c; 1123 c = *input++; 1124 } 1125 } 1126 1127 switch (state) { 1128 case 0: /* Waiting for (unescaped) $ */ 1129 if ((c == '\'') && (prev != '\\')) { 1130 state = 3; 1131 break; 1132 } 1133 if ((c == '$') && (prev != '\\')) { 1134 state++; 1135 } else { 1136 *(output++) = c; 1137 outputcnt--; 1138 } 1139 break; 1140 case 1: /* Waiting for ( */ 1141 if (c == '(' || c == '{') { 1142 state++; 1143 varname_start = input; 1144 } else { 1145 state = 0; 1146 *(output++) = '$'; 1147 outputcnt--; 1148 1149 if (outputcnt) { 1150 *(output++) = c; 1151 outputcnt--; 1152 } 1153 } 1154 break; 1155 case 2: /* Waiting for ) */ 1156 if (c == ')' || c == '}') { 1157 int i; 1158 char envname[CFG_CBSIZE], *envval; 1159 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1160 1161 /* Get the varname */ 1162 for (i = 0; i < envcnt; i++) { 1163 envname[i] = varname_start[i]; 1164 } 1165 envname[i] = 0; 1166 1167 /* Get its value */ 1168 envval = getenv (envname); 1169 1170 /* Copy into the line if it exists */ 1171 if (envval != NULL) 1172 while ((*envval) && outputcnt) { 1173 *(output++) = *(envval++); 1174 outputcnt--; 1175 } 1176 /* Look for another '$' */ 1177 state = 0; 1178 } 1179 break; 1180 case 3: /* Waiting for ' */ 1181 if ((c == '\'') && (prev != '\\')) { 1182 state = 0; 1183 } else { 1184 *(output++) = c; 1185 outputcnt--; 1186 } 1187 break; 1188 } 1189 prev = c; 1190 } 1191 1192 if (outputcnt) 1193 *output = 0; 1194 1195 #ifdef DEBUG_PARSER 1196 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1197 strlen (output_start), output_start); 1198 #endif 1199 } 1200 1201 /**************************************************************************** 1202 * returns: 1203 * 1 - command executed, repeatable 1204 * 0 - command executed but not repeatable, interrupted commands are 1205 * always considered not repeatable 1206 * -1 - not executed (unrecognized, bootd recursion or too many args) 1207 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 1208 * considered unrecognized) 1209 * 1210 * WARNING: 1211 * 1212 * We must create a temporary copy of the command since the command we get 1213 * may be the result from getenv(), which returns a pointer directly to 1214 * the environment data, which may change magicly when the command we run 1215 * creates or modifies environment variables (like "bootp" does). 1216 */ 1217 1218 int run_command (const char *cmd, int flag) 1219 { 1220 cmd_tbl_t *cmdtp; 1221 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 1222 char *token; /* start of token in cmdbuf */ 1223 char *sep; /* end of token (separator) in cmdbuf */ 1224 char finaltoken[CFG_CBSIZE]; 1225 char *str = cmdbuf; 1226 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 1227 int argc, inquotes; 1228 int repeatable = 1; 1229 int rc = 0; 1230 1231 #ifdef DEBUG_PARSER 1232 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1233 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1234 puts ("\"\n"); 1235 #endif 1236 1237 clear_ctrlc(); /* forget any previous Control C */ 1238 1239 if (!cmd || !*cmd) { 1240 return -1; /* empty command */ 1241 } 1242 1243 if (strlen(cmd) >= CFG_CBSIZE) { 1244 puts ("## Command too long!\n"); 1245 return -1; 1246 } 1247 1248 strcpy (cmdbuf, cmd); 1249 1250 /* Process separators and check for invalid 1251 * repeatable commands 1252 */ 1253 1254 #ifdef DEBUG_PARSER 1255 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1256 #endif 1257 while (*str) { 1258 1259 /* 1260 * Find separator, or string end 1261 * Allow simple escape of ';' by writing "\;" 1262 */ 1263 for (inquotes = 0, sep = str; *sep; sep++) { 1264 if ((*sep=='\'') && 1265 (*(sep-1) != '\\')) 1266 inquotes=!inquotes; 1267 1268 if (!inquotes && 1269 (*sep == ';') && /* separator */ 1270 ( sep != str) && /* past string start */ 1271 (*(sep-1) != '\\')) /* and NOT escaped */ 1272 break; 1273 } 1274 1275 /* 1276 * Limit the token to data between separators 1277 */ 1278 token = str; 1279 if (*sep) { 1280 str = sep + 1; /* start of command for next pass */ 1281 *sep = '\0'; 1282 } 1283 else 1284 str = sep; /* no more commands for next pass */ 1285 #ifdef DEBUG_PARSER 1286 printf ("token: \"%s\"\n", token); 1287 #endif 1288 1289 /* find macros in this token and replace them */ 1290 process_macros (token, finaltoken); 1291 1292 /* Extract arguments */ 1293 if ((argc = parse_line (finaltoken, argv)) == 0) { 1294 rc = -1; /* no command at all */ 1295 continue; 1296 } 1297 1298 /* Look up command in command table */ 1299 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1300 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1301 rc = -1; /* give up after bad command */ 1302 continue; 1303 } 1304 1305 /* found - check max args */ 1306 if (argc > cmdtp->maxargs) { 1307 printf ("Usage:\n%s\n", cmdtp->usage); 1308 rc = -1; 1309 continue; 1310 } 1311 1312 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 1313 /* avoid "bootd" recursion */ 1314 if (cmdtp->cmd == do_bootd) { 1315 #ifdef DEBUG_PARSER 1316 printf ("[%s]\n", finaltoken); 1317 #endif 1318 if (flag & CMD_FLAG_BOOTD) { 1319 puts ("'bootd' recursion detected\n"); 1320 rc = -1; 1321 continue; 1322 } else { 1323 flag |= CMD_FLAG_BOOTD; 1324 } 1325 } 1326 #endif /* CFG_CMD_BOOTD */ 1327 1328 /* OK - call function to do the command */ 1329 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1330 rc = -1; 1331 } 1332 1333 repeatable &= cmdtp->repeatable; 1334 1335 /* Did the user stop this? */ 1336 if (had_ctrlc ()) 1337 return 0; /* if stopped then not repeatable */ 1338 } 1339 1340 return rc ? rc : repeatable; 1341 } 1342 1343 /****************************************************************************/ 1344 1345 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 1346 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1347 { 1348 int i; 1349 1350 if (argc < 2) { 1351 printf ("Usage:\n%s\n", cmdtp->usage); 1352 return 1; 1353 } 1354 1355 for (i=1; i<argc; ++i) { 1356 char *arg; 1357 1358 if ((arg = getenv (argv[i])) == NULL) { 1359 printf ("## Error: \"%s\" not defined\n", argv[i]); 1360 return 1; 1361 } 1362 #ifndef CFG_HUSH_PARSER 1363 if (run_command (arg, flag) == -1) 1364 return 1; 1365 #else 1366 if (parse_string_outer(arg, 1367 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1368 return 1; 1369 #endif 1370 } 1371 return 0; 1372 } 1373 #endif /* CFG_CMD_RUN */ 1374