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 /* 48 * Board-specific Platform code can reimplement show_boot_progress () if needed 49 */ 50 void inline __show_boot_progress (int val) {} 51 void inline show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress"))); 52 53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) 54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */ 55 #endif 56 57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 58 59 60 #define MAX_DELAY_STOP_STR 32 61 62 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 63 static int abortboot(int); 64 #endif 65 66 #undef DEBUG_PARSER 67 68 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */ 69 70 #ifndef CONFIG_CMDLINE_EDITING 71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 72 static char erase_seq[] = "\b \b"; /* erase sequence */ 73 static char tab_seq[] = " "; /* used to expand TABs */ 74 #endif /* CONFIG_CMDLINE_EDITING */ 75 76 #ifdef CONFIG_BOOT_RETRY_TIME 77 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 78 static int retry_time = -1; /* -1 so can call readline before main_loop */ 79 #endif 80 81 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 82 83 #ifndef CONFIG_BOOT_RETRY_MIN 84 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 85 #endif 86 87 #ifdef CONFIG_MODEM_SUPPORT 88 int do_mdm_init = 0; 89 extern void mdm_init(void); /* defined in board.c */ 90 #endif 91 92 /*************************************************************************** 93 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 94 * returns: 0 - no key string, allow autoboot 95 * 1 - got key string, abort 96 */ 97 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 98 # if defined(CONFIG_AUTOBOOT_KEYED) 99 static __inline__ int abortboot(int bootdelay) 100 { 101 int abort = 0; 102 uint64_t etime = endtick(bootdelay); 103 struct { 104 char* str; 105 u_int len; 106 int retry; 107 } 108 delaykey [] = { 109 { str: getenv ("bootdelaykey"), retry: 1 }, 110 { str: getenv ("bootdelaykey2"), retry: 1 }, 111 { str: getenv ("bootstopkey"), retry: 0 }, 112 { str: getenv ("bootstopkey2"), retry: 0 }, 113 }; 114 115 char presskey [MAX_DELAY_STOP_STR]; 116 u_int presskey_len = 0; 117 u_int presskey_max = 0; 118 u_int i; 119 120 # ifdef CONFIG_AUTOBOOT_PROMPT 121 printf(CONFIG_AUTOBOOT_PROMPT, bootdelay); 122 # endif 123 124 # ifdef CONFIG_AUTOBOOT_DELAY_STR 125 if (delaykey[0].str == NULL) 126 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 127 # endif 128 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 129 if (delaykey[1].str == NULL) 130 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 131 # endif 132 # ifdef CONFIG_AUTOBOOT_STOP_STR 133 if (delaykey[2].str == NULL) 134 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 135 # endif 136 # ifdef CONFIG_AUTOBOOT_STOP_STR2 137 if (delaykey[3].str == NULL) 138 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 139 # endif 140 141 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 142 delaykey[i].len = delaykey[i].str == NULL ? 143 0 : strlen (delaykey[i].str); 144 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 145 MAX_DELAY_STOP_STR : delaykey[i].len; 146 147 presskey_max = presskey_max > delaykey[i].len ? 148 presskey_max : delaykey[i].len; 149 150 # if DEBUG_BOOTKEYS 151 printf("%s key:<%s>\n", 152 delaykey[i].retry ? "delay" : "stop", 153 delaykey[i].str ? delaykey[i].str : "NULL"); 154 # endif 155 } 156 157 /* In order to keep up with incoming data, check timeout only 158 * when catch up. 159 */ 160 while (!abort && get_ticks() <= etime) { 161 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 162 if (delaykey[i].len > 0 && 163 presskey_len >= delaykey[i].len && 164 memcmp (presskey + presskey_len - delaykey[i].len, 165 delaykey[i].str, 166 delaykey[i].len) == 0) { 167 # if DEBUG_BOOTKEYS 168 printf("got %skey\n", 169 delaykey[i].retry ? "delay" : "stop"); 170 # endif 171 172 # ifdef CONFIG_BOOT_RETRY_TIME 173 /* don't retry auto boot */ 174 if (! delaykey[i].retry) 175 retry_time = -1; 176 # endif 177 abort = 1; 178 } 179 } 180 181 if (tstc()) { 182 if (presskey_len < presskey_max) { 183 presskey [presskey_len ++] = getc(); 184 } 185 else { 186 for (i = 0; i < presskey_max - 1; i ++) 187 presskey [i] = presskey [i + 1]; 188 189 presskey [i] = getc(); 190 } 191 } 192 } 193 # if DEBUG_BOOTKEYS 194 if (!abort) 195 puts("key timeout\n"); 196 # endif 197 198 #ifdef CONFIG_SILENT_CONSOLE 199 if (abort) 200 gd->flags &= ~GD_FLG_SILENT; 201 #endif 202 203 return abort; 204 } 205 206 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 207 208 #ifdef CONFIG_MENUKEY 209 static int menukey = 0; 210 #endif 211 212 static __inline__ int abortboot(int bootdelay) 213 { 214 int abort = 0; 215 216 #ifdef CONFIG_MENUPROMPT 217 printf(CONFIG_MENUPROMPT, bootdelay); 218 #else 219 printf("Hit any key to stop autoboot: %2d ", bootdelay); 220 #endif 221 222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 223 /* 224 * Check if key already pressed 225 * Don't check if bootdelay < 0 226 */ 227 if (bootdelay >= 0) { 228 if (tstc()) { /* we got a key press */ 229 (void) getc(); /* consume input */ 230 puts ("\b\b\b 0"); 231 abort = 1; /* don't auto boot */ 232 } 233 } 234 #endif 235 236 while ((bootdelay > 0) && (!abort)) { 237 int i; 238 239 --bootdelay; 240 /* delay 100 * 10ms */ 241 for (i=0; !abort && i<100; ++i) { 242 if (tstc()) { /* we got a key press */ 243 abort = 1; /* don't auto boot */ 244 bootdelay = 0; /* no more delay */ 245 # ifdef CONFIG_MENUKEY 246 menukey = getc(); 247 # else 248 (void) getc(); /* consume input */ 249 # endif 250 break; 251 } 252 udelay(10000); 253 } 254 255 printf("\b\b\b%2d ", bootdelay); 256 } 257 258 putc('\n'); 259 260 #ifdef CONFIG_SILENT_CONSOLE 261 if (abort) 262 gd->flags &= ~GD_FLG_SILENT; 263 #endif 264 265 return abort; 266 } 267 # endif /* CONFIG_AUTOBOOT_KEYED */ 268 #endif /* CONFIG_BOOTDELAY >= 0 */ 269 270 /****************************************************************************/ 271 272 void main_loop (void) 273 { 274 #ifndef CFG_HUSH_PARSER 275 static char lastcommand[CFG_CBSIZE] = { 0, }; 276 int len; 277 int rc = 1; 278 int flag; 279 #endif 280 281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 282 char *s; 283 int bootdelay; 284 #endif 285 #ifdef CONFIG_PREBOOT 286 char *p; 287 #endif 288 #ifdef CONFIG_BOOTCOUNT_LIMIT 289 unsigned long bootcount = 0; 290 unsigned long bootlimit = 0; 291 char *bcs; 292 char bcs_set[16]; 293 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 294 295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 296 ulong bmp = 0; /* default bitmap */ 297 extern int trab_vfd (ulong bitmap); 298 299 #ifdef CONFIG_MODEM_SUPPORT 300 if (do_mdm_init) 301 bmp = 1; /* alternate bitmap */ 302 #endif 303 trab_vfd (bmp); 304 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 305 306 #ifdef CONFIG_BOOTCOUNT_LIMIT 307 bootcount = bootcount_load(); 308 bootcount++; 309 bootcount_store (bootcount); 310 sprintf (bcs_set, "%lu", bootcount); 311 setenv ("bootcount", bcs_set); 312 bcs = getenv ("bootlimit"); 313 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 315 316 #ifdef CONFIG_MODEM_SUPPORT 317 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 318 if (do_mdm_init) { 319 char *str = strdup(getenv("mdm_cmd")); 320 setenv ("preboot", str); /* set or delete definition */ 321 if (str != NULL) 322 free (str); 323 mdm_init(); /* wait for modem connection */ 324 } 325 #endif /* CONFIG_MODEM_SUPPORT */ 326 327 #ifdef CONFIG_VERSION_VARIABLE 328 { 329 extern char version_string[]; 330 331 setenv ("ver", version_string); /* set version variable */ 332 } 333 #endif /* CONFIG_VERSION_VARIABLE */ 334 335 #ifdef CFG_HUSH_PARSER 336 u_boot_hush_start (); 337 #endif 338 339 #ifdef CONFIG_AUTO_COMPLETE 340 install_auto_complete(); 341 #endif 342 343 #ifdef CONFIG_PREBOOT 344 if ((p = getenv ("preboot")) != NULL) { 345 # ifdef CONFIG_AUTOBOOT_KEYED 346 int prev = disable_ctrlc(1); /* disable Control C checking */ 347 # endif 348 349 # ifndef CFG_HUSH_PARSER 350 run_command (p, 0); 351 # else 352 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 353 FLAG_EXIT_FROM_LOOP); 354 # endif 355 356 # ifdef CONFIG_AUTOBOOT_KEYED 357 disable_ctrlc(prev); /* restore Control C checking */ 358 # endif 359 } 360 #endif /* CONFIG_PREBOOT */ 361 362 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 363 s = getenv ("bootdelay"); 364 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 365 366 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 367 368 # ifdef CONFIG_BOOT_RETRY_TIME 369 init_cmd_timeout (); 370 # endif /* CONFIG_BOOT_RETRY_TIME */ 371 372 #ifdef CONFIG_BOOTCOUNT_LIMIT 373 if (bootlimit && (bootcount > bootlimit)) { 374 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 375 (unsigned)bootlimit); 376 s = getenv ("altbootcmd"); 377 } 378 else 379 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 380 s = getenv ("bootcmd"); 381 382 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 383 384 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 385 # ifdef CONFIG_AUTOBOOT_KEYED 386 int prev = disable_ctrlc(1); /* disable Control C checking */ 387 # endif 388 389 # ifndef CFG_HUSH_PARSER 390 run_command (s, 0); 391 # else 392 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 393 FLAG_EXIT_FROM_LOOP); 394 # endif 395 396 # ifdef CONFIG_AUTOBOOT_KEYED 397 disable_ctrlc(prev); /* restore Control C checking */ 398 # endif 399 } 400 401 # ifdef CONFIG_MENUKEY 402 if (menukey == CONFIG_MENUKEY) { 403 s = getenv("menucmd"); 404 if (s) { 405 # ifndef CFG_HUSH_PARSER 406 run_command (s, 0); 407 # else 408 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 409 FLAG_EXIT_FROM_LOOP); 410 # endif 411 } 412 } 413 #endif /* CONFIG_MENUKEY */ 414 #endif /* CONFIG_BOOTDELAY */ 415 416 #ifdef CONFIG_AMIGAONEG3SE 417 { 418 extern void video_banner(void); 419 video_banner(); 420 } 421 #endif 422 423 /* 424 * Main Loop for Monitor Command Processing 425 */ 426 #ifdef CFG_HUSH_PARSER 427 parse_file_outer(); 428 /* This point is never reached */ 429 for (;;); 430 #else 431 for (;;) { 432 #ifdef CONFIG_BOOT_RETRY_TIME 433 if (rc >= 0) { 434 /* Saw enough of a valid command to 435 * restart the timeout. 436 */ 437 reset_cmd_timeout(); 438 } 439 #endif 440 len = readline (CFG_PROMPT); 441 442 flag = 0; /* assume no special flags for now */ 443 if (len > 0) 444 strcpy (lastcommand, console_buffer); 445 else if (len == 0) 446 flag |= CMD_FLAG_REPEAT; 447 #ifdef CONFIG_BOOT_RETRY_TIME 448 else if (len == -2) { 449 /* -2 means timed out, retry autoboot 450 */ 451 puts ("\nTimed out waiting for command\n"); 452 # ifdef CONFIG_RESET_TO_RETRY 453 /* Reinit board to run initialization code again */ 454 do_reset (NULL, 0, 0, NULL); 455 # else 456 return; /* retry autoboot */ 457 # endif 458 } 459 #endif 460 461 if (len == -1) 462 puts ("<INTERRUPT>\n"); 463 else 464 rc = run_command (lastcommand, flag); 465 466 if (rc <= 0) { 467 /* invalid command or not repeatable, forget it */ 468 lastcommand[0] = 0; 469 } 470 } 471 #endif /*CFG_HUSH_PARSER*/ 472 } 473 474 #ifdef CONFIG_BOOT_RETRY_TIME 475 /*************************************************************************** 476 * initialize command line timeout 477 */ 478 void init_cmd_timeout(void) 479 { 480 char *s = getenv ("bootretry"); 481 482 if (s != NULL) 483 retry_time = (int)simple_strtol(s, NULL, 10); 484 else 485 retry_time = CONFIG_BOOT_RETRY_TIME; 486 487 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 488 retry_time = CONFIG_BOOT_RETRY_MIN; 489 } 490 491 /*************************************************************************** 492 * reset command line timeout to retry_time seconds 493 */ 494 void reset_cmd_timeout(void) 495 { 496 endtime = endtick(retry_time); 497 } 498 #endif 499 500 #ifdef CONFIG_CMDLINE_EDITING 501 502 /* 503 * cmdline-editing related codes from vivi. 504 * Author: Janghoon Lyu <nandy@mizi.com> 505 */ 506 507 #define putnstr(str,n) do { \ 508 printf ("%.*s", n, str); \ 509 } while (0) 510 511 #define CTL_CH(c) ((c) - 'a' + 1) 512 513 #define MAX_CMDBUF_SIZE 256 514 515 #define CTL_BACKSPACE ('\b') 516 #define DEL ((char)255) 517 #define DEL7 ((char)127) 518 #define CREAD_HIST_CHAR ('!') 519 520 #define getcmd_putch(ch) putc(ch) 521 #define getcmd_getch() getc() 522 #define getcmd_cbeep() getcmd_putch('\a') 523 524 #define HIST_MAX 20 525 #define HIST_SIZE MAX_CMDBUF_SIZE 526 527 static int hist_max = 0; 528 static int hist_add_idx = 0; 529 static int hist_cur = -1; 530 unsigned hist_num = 0; 531 532 char* hist_list[HIST_MAX]; 533 char hist_lines[HIST_MAX][HIST_SIZE]; 534 535 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 536 537 static void hist_init(void) 538 { 539 int i; 540 541 hist_max = 0; 542 hist_add_idx = 0; 543 hist_cur = -1; 544 hist_num = 0; 545 546 for (i = 0; i < HIST_MAX; i++) { 547 hist_list[i] = hist_lines[i]; 548 hist_list[i][0] = '\0'; 549 } 550 } 551 552 static void cread_add_to_hist(char *line) 553 { 554 strcpy(hist_list[hist_add_idx], line); 555 556 if (++hist_add_idx >= HIST_MAX) 557 hist_add_idx = 0; 558 559 if (hist_add_idx > hist_max) 560 hist_max = hist_add_idx; 561 562 hist_num++; 563 } 564 565 static char* hist_prev(void) 566 { 567 char *ret; 568 int old_cur; 569 570 if (hist_cur < 0) 571 return NULL; 572 573 old_cur = hist_cur; 574 if (--hist_cur < 0) 575 hist_cur = hist_max; 576 577 if (hist_cur == hist_add_idx) { 578 hist_cur = old_cur; 579 ret = NULL; 580 } else 581 ret = hist_list[hist_cur]; 582 583 return (ret); 584 } 585 586 static char* hist_next(void) 587 { 588 char *ret; 589 590 if (hist_cur < 0) 591 return NULL; 592 593 if (hist_cur == hist_add_idx) 594 return NULL; 595 596 if (++hist_cur > hist_max) 597 hist_cur = 0; 598 599 if (hist_cur == hist_add_idx) { 600 ret = ""; 601 } else 602 ret = hist_list[hist_cur]; 603 604 return (ret); 605 } 606 607 #ifndef CONFIG_CMDLINE_EDITING 608 static void cread_print_hist_list(void) 609 { 610 int i; 611 unsigned long n; 612 613 n = hist_num - hist_max; 614 615 i = hist_add_idx + 1; 616 while (1) { 617 if (i > hist_max) 618 i = 0; 619 if (i == hist_add_idx) 620 break; 621 printf("%s\n", hist_list[i]); 622 n++; 623 i++; 624 } 625 } 626 #endif /* CONFIG_CMDLINE_EDITING */ 627 628 #define BEGINNING_OF_LINE() { \ 629 while (num) { \ 630 getcmd_putch(CTL_BACKSPACE); \ 631 num--; \ 632 } \ 633 } 634 635 #define ERASE_TO_EOL() { \ 636 if (num < eol_num) { \ 637 int tmp; \ 638 for (tmp = num; tmp < eol_num; tmp++) \ 639 getcmd_putch(' '); \ 640 while (tmp-- > num) \ 641 getcmd_putch(CTL_BACKSPACE); \ 642 eol_num = num; \ 643 } \ 644 } 645 646 #define REFRESH_TO_EOL() { \ 647 if (num < eol_num) { \ 648 wlen = eol_num - num; \ 649 putnstr(buf + num, wlen); \ 650 num = eol_num; \ 651 } \ 652 } 653 654 static void cread_add_char(char ichar, int insert, unsigned long *num, 655 unsigned long *eol_num, char *buf, unsigned long len) 656 { 657 unsigned long wlen; 658 659 /* room ??? */ 660 if (insert || *num == *eol_num) { 661 if (*eol_num > len - 1) { 662 getcmd_cbeep(); 663 return; 664 } 665 (*eol_num)++; 666 } 667 668 if (insert) { 669 wlen = *eol_num - *num; 670 if (wlen > 1) { 671 memmove(&buf[*num+1], &buf[*num], wlen-1); 672 } 673 674 buf[*num] = ichar; 675 putnstr(buf + *num, wlen); 676 (*num)++; 677 while (--wlen) { 678 getcmd_putch(CTL_BACKSPACE); 679 } 680 } else { 681 /* echo the character */ 682 wlen = 1; 683 buf[*num] = ichar; 684 putnstr(buf + *num, wlen); 685 (*num)++; 686 } 687 } 688 689 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 690 unsigned long *eol_num, char *buf, unsigned long len) 691 { 692 while (strsize--) { 693 cread_add_char(*str, insert, num, eol_num, buf, len); 694 str++; 695 } 696 } 697 698 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 699 { 700 unsigned long num = 0; 701 unsigned long eol_num = 0; 702 unsigned long rlen; 703 unsigned long wlen; 704 char ichar; 705 int insert = 1; 706 int esc_len = 0; 707 int rc = 0; 708 char esc_save[8]; 709 710 while (1) { 711 rlen = 1; 712 ichar = getcmd_getch(); 713 714 if ((ichar == '\n') || (ichar == '\r')) { 715 putc('\n'); 716 break; 717 } 718 719 /* 720 * handle standard linux xterm esc sequences for arrow key, etc. 721 */ 722 if (esc_len != 0) { 723 if (esc_len == 1) { 724 if (ichar == '[') { 725 esc_save[esc_len] = ichar; 726 esc_len = 2; 727 } else { 728 cread_add_str(esc_save, esc_len, insert, 729 &num, &eol_num, buf, *len); 730 esc_len = 0; 731 } 732 continue; 733 } 734 735 switch (ichar) { 736 737 case 'D': /* <- key */ 738 ichar = CTL_CH('b'); 739 esc_len = 0; 740 break; 741 case 'C': /* -> key */ 742 ichar = CTL_CH('f'); 743 esc_len = 0; 744 break; /* pass off to ^F handler */ 745 case 'H': /* Home key */ 746 ichar = CTL_CH('a'); 747 esc_len = 0; 748 break; /* pass off to ^A handler */ 749 case 'A': /* up arrow */ 750 ichar = CTL_CH('p'); 751 esc_len = 0; 752 break; /* pass off to ^P handler */ 753 case 'B': /* down arrow */ 754 ichar = CTL_CH('n'); 755 esc_len = 0; 756 break; /* pass off to ^N handler */ 757 default: 758 esc_save[esc_len++] = ichar; 759 cread_add_str(esc_save, esc_len, insert, 760 &num, &eol_num, buf, *len); 761 esc_len = 0; 762 continue; 763 } 764 } 765 766 switch (ichar) { 767 case 0x1b: 768 if (esc_len == 0) { 769 esc_save[esc_len] = ichar; 770 esc_len = 1; 771 } else { 772 puts("impossible condition #876\n"); 773 esc_len = 0; 774 } 775 break; 776 777 case CTL_CH('a'): 778 BEGINNING_OF_LINE(); 779 break; 780 case CTL_CH('c'): /* ^C - break */ 781 *buf = '\0'; /* discard input */ 782 return (-1); 783 case CTL_CH('f'): 784 if (num < eol_num) { 785 getcmd_putch(buf[num]); 786 num++; 787 } 788 break; 789 case CTL_CH('b'): 790 if (num) { 791 getcmd_putch(CTL_BACKSPACE); 792 num--; 793 } 794 break; 795 case CTL_CH('d'): 796 if (num < eol_num) { 797 wlen = eol_num - num - 1; 798 if (wlen) { 799 memmove(&buf[num], &buf[num+1], wlen); 800 putnstr(buf + num, wlen); 801 } 802 803 getcmd_putch(' '); 804 do { 805 getcmd_putch(CTL_BACKSPACE); 806 } while (wlen--); 807 eol_num--; 808 } 809 break; 810 case CTL_CH('k'): 811 ERASE_TO_EOL(); 812 break; 813 case CTL_CH('e'): 814 REFRESH_TO_EOL(); 815 break; 816 case CTL_CH('o'): 817 insert = !insert; 818 break; 819 case CTL_CH('x'): 820 case CTL_CH('u'): 821 BEGINNING_OF_LINE(); 822 ERASE_TO_EOL(); 823 break; 824 case DEL: 825 case DEL7: 826 case 8: 827 if (num) { 828 wlen = eol_num - num; 829 num--; 830 memmove(&buf[num], &buf[num+1], wlen); 831 getcmd_putch(CTL_BACKSPACE); 832 putnstr(buf + num, wlen); 833 getcmd_putch(' '); 834 do { 835 getcmd_putch(CTL_BACKSPACE); 836 } while (wlen--); 837 eol_num--; 838 } 839 break; 840 case CTL_CH('p'): 841 case CTL_CH('n'): 842 { 843 char * hline; 844 845 esc_len = 0; 846 847 if (ichar == CTL_CH('p')) 848 hline = hist_prev(); 849 else 850 hline = hist_next(); 851 852 if (!hline) { 853 getcmd_cbeep(); 854 continue; 855 } 856 857 /* nuke the current line */ 858 /* first, go home */ 859 BEGINNING_OF_LINE(); 860 861 /* erase to end of line */ 862 ERASE_TO_EOL(); 863 864 /* copy new line into place and display */ 865 strcpy(buf, hline); 866 eol_num = strlen(buf); 867 REFRESH_TO_EOL(); 868 continue; 869 } 870 #ifdef CONFIG_AUTO_COMPLETE 871 case '\t': { 872 int num2, col; 873 874 /* do not autocomplete when in the middle */ 875 if (num < eol_num) { 876 getcmd_cbeep(); 877 break; 878 } 879 880 buf[num] = '\0'; 881 col = strlen(prompt) + eol_num; 882 num2 = num; 883 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 884 col = num2 - num; 885 num += col; 886 eol_num += col; 887 } 888 break; 889 } 890 #endif 891 default: 892 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 893 break; 894 } 895 } 896 *len = eol_num; 897 buf[eol_num] = '\0'; /* lose the newline */ 898 899 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 900 cread_add_to_hist(buf); 901 hist_cur = hist_add_idx; 902 903 return (rc); 904 } 905 906 #endif /* CONFIG_CMDLINE_EDITING */ 907 908 /****************************************************************************/ 909 910 /* 911 * Prompt for input and read a line. 912 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 913 * time out when time goes past endtime (timebase time in ticks). 914 * Return: number of read characters 915 * -1 if break 916 * -2 if timed out 917 */ 918 int readline (const char *const prompt) 919 { 920 return readline_into_buffer(prompt, console_buffer); 921 } 922 923 924 int readline_into_buffer (const char *const prompt, char * buffer) 925 { 926 char *p = buffer; 927 #ifdef CONFIG_CMDLINE_EDITING 928 unsigned int len=MAX_CMDBUF_SIZE; 929 int rc; 930 static int initted = 0; 931 932 if (!initted) { 933 hist_init(); 934 initted = 1; 935 } 936 937 puts (prompt); 938 939 rc = cread_line(prompt, p, &len); 940 return rc < 0 ? rc : len; 941 #else 942 char * p_buf = p; 943 int n = 0; /* buffer index */ 944 int plen = 0; /* prompt length */ 945 int col; /* output column cnt */ 946 char c; 947 948 /* print prompt */ 949 if (prompt) { 950 plen = strlen (prompt); 951 puts (prompt); 952 } 953 col = plen; 954 955 for (;;) { 956 #ifdef CONFIG_BOOT_RETRY_TIME 957 while (!tstc()) { /* while no incoming data */ 958 if (retry_time >= 0 && get_ticks() > endtime) 959 return (-2); /* timed out */ 960 } 961 #endif 962 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 963 964 #ifdef CONFIG_SHOW_ACTIVITY 965 while (!tstc()) { 966 extern void show_activity(int arg); 967 show_activity(0); 968 } 969 #endif 970 c = getc(); 971 972 /* 973 * Special character handling 974 */ 975 switch (c) { 976 case '\r': /* Enter */ 977 case '\n': 978 *p = '\0'; 979 puts ("\r\n"); 980 return (p - p_buf); 981 982 case '\0': /* nul */ 983 continue; 984 985 case 0x03: /* ^C - break */ 986 p_buf[0] = '\0'; /* discard input */ 987 return (-1); 988 989 case 0x15: /* ^U - erase line */ 990 while (col > plen) { 991 puts (erase_seq); 992 --col; 993 } 994 p = p_buf; 995 n = 0; 996 continue; 997 998 case 0x17: /* ^W - erase word */ 999 p=delete_char(p_buf, p, &col, &n, plen); 1000 while ((n > 0) && (*p != ' ')) { 1001 p=delete_char(p_buf, p, &col, &n, plen); 1002 } 1003 continue; 1004 1005 case 0x08: /* ^H - backspace */ 1006 case 0x7F: /* DEL - backspace */ 1007 p=delete_char(p_buf, p, &col, &n, plen); 1008 continue; 1009 1010 default: 1011 /* 1012 * Must be a normal character then 1013 */ 1014 if (n < CFG_CBSIZE-2) { 1015 if (c == '\t') { /* expand TABs */ 1016 #ifdef CONFIG_AUTO_COMPLETE 1017 /* if auto completion triggered just continue */ 1018 *p = '\0'; 1019 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1020 p = p_buf + n; /* reset */ 1021 continue; 1022 } 1023 #endif 1024 puts (tab_seq+(col&07)); 1025 col += 8 - (col&07); 1026 } else { 1027 ++col; /* echo input */ 1028 putc (c); 1029 } 1030 *p++ = c; 1031 ++n; 1032 } else { /* Buffer full */ 1033 putc ('\a'); 1034 } 1035 } 1036 } 1037 #endif /* CONFIG_CMDLINE_EDITING */ 1038 } 1039 1040 /****************************************************************************/ 1041 1042 #ifndef CONFIG_CMDLINE_EDITING 1043 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1044 { 1045 char *s; 1046 1047 if (*np == 0) { 1048 return (p); 1049 } 1050 1051 if (*(--p) == '\t') { /* will retype the whole line */ 1052 while (*colp > plen) { 1053 puts (erase_seq); 1054 (*colp)--; 1055 } 1056 for (s=buffer; s<p; ++s) { 1057 if (*s == '\t') { 1058 puts (tab_seq+((*colp) & 07)); 1059 *colp += 8 - ((*colp) & 07); 1060 } else { 1061 ++(*colp); 1062 putc (*s); 1063 } 1064 } 1065 } else { 1066 puts (erase_seq); 1067 (*colp)--; 1068 } 1069 (*np)--; 1070 return (p); 1071 } 1072 #endif /* CONFIG_CMDLINE_EDITING */ 1073 1074 /****************************************************************************/ 1075 1076 int parse_line (char *line, char *argv[]) 1077 { 1078 int nargs = 0; 1079 1080 #ifdef DEBUG_PARSER 1081 printf ("parse_line: \"%s\"\n", line); 1082 #endif 1083 while (nargs < CFG_MAXARGS) { 1084 1085 /* skip any white space */ 1086 while ((*line == ' ') || (*line == '\t')) { 1087 ++line; 1088 } 1089 1090 if (*line == '\0') { /* end of line, no more args */ 1091 argv[nargs] = NULL; 1092 #ifdef DEBUG_PARSER 1093 printf ("parse_line: nargs=%d\n", nargs); 1094 #endif 1095 return (nargs); 1096 } 1097 1098 argv[nargs++] = line; /* begin of argument string */ 1099 1100 /* find end of string */ 1101 while (*line && (*line != ' ') && (*line != '\t')) { 1102 ++line; 1103 } 1104 1105 if (*line == '\0') { /* end of line, no more args */ 1106 argv[nargs] = NULL; 1107 #ifdef DEBUG_PARSER 1108 printf ("parse_line: nargs=%d\n", nargs); 1109 #endif 1110 return (nargs); 1111 } 1112 1113 *line++ = '\0'; /* terminate current arg */ 1114 } 1115 1116 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 1117 1118 #ifdef DEBUG_PARSER 1119 printf ("parse_line: nargs=%d\n", nargs); 1120 #endif 1121 return (nargs); 1122 } 1123 1124 /****************************************************************************/ 1125 1126 static void process_macros (const char *input, char *output) 1127 { 1128 char c, prev; 1129 const char *varname_start = NULL; 1130 int inputcnt = strlen (input); 1131 int outputcnt = CFG_CBSIZE; 1132 int state = 0; /* 0 = waiting for '$' */ 1133 1134 /* 1 = waiting for '(' or '{' */ 1135 /* 2 = waiting for ')' or '}' */ 1136 /* 3 = waiting for ''' */ 1137 #ifdef DEBUG_PARSER 1138 char *output_start = output; 1139 1140 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1141 input); 1142 #endif 1143 1144 prev = '\0'; /* previous character */ 1145 1146 while (inputcnt && outputcnt) { 1147 c = *input++; 1148 inputcnt--; 1149 1150 if (state != 3) { 1151 /* remove one level of escape characters */ 1152 if ((c == '\\') && (prev != '\\')) { 1153 if (inputcnt-- == 0) 1154 break; 1155 prev = c; 1156 c = *input++; 1157 } 1158 } 1159 1160 switch (state) { 1161 case 0: /* Waiting for (unescaped) $ */ 1162 if ((c == '\'') && (prev != '\\')) { 1163 state = 3; 1164 break; 1165 } 1166 if ((c == '$') && (prev != '\\')) { 1167 state++; 1168 } else { 1169 *(output++) = c; 1170 outputcnt--; 1171 } 1172 break; 1173 case 1: /* Waiting for ( */ 1174 if (c == '(' || c == '{') { 1175 state++; 1176 varname_start = input; 1177 } else { 1178 state = 0; 1179 *(output++) = '$'; 1180 outputcnt--; 1181 1182 if (outputcnt) { 1183 *(output++) = c; 1184 outputcnt--; 1185 } 1186 } 1187 break; 1188 case 2: /* Waiting for ) */ 1189 if (c == ')' || c == '}') { 1190 int i; 1191 char envname[CFG_CBSIZE], *envval; 1192 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1193 1194 /* Get the varname */ 1195 for (i = 0; i < envcnt; i++) { 1196 envname[i] = varname_start[i]; 1197 } 1198 envname[i] = 0; 1199 1200 /* Get its value */ 1201 envval = getenv (envname); 1202 1203 /* Copy into the line if it exists */ 1204 if (envval != NULL) 1205 while ((*envval) && outputcnt) { 1206 *(output++) = *(envval++); 1207 outputcnt--; 1208 } 1209 /* Look for another '$' */ 1210 state = 0; 1211 } 1212 break; 1213 case 3: /* Waiting for ' */ 1214 if ((c == '\'') && (prev != '\\')) { 1215 state = 0; 1216 } else { 1217 *(output++) = c; 1218 outputcnt--; 1219 } 1220 break; 1221 } 1222 prev = c; 1223 } 1224 1225 if (outputcnt) 1226 *output = 0; 1227 else 1228 *(output - 1) = 0; 1229 1230 #ifdef DEBUG_PARSER 1231 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1232 strlen (output_start), output_start); 1233 #endif 1234 } 1235 1236 /**************************************************************************** 1237 * returns: 1238 * 1 - command executed, repeatable 1239 * 0 - command executed but not repeatable, interrupted commands are 1240 * always considered not repeatable 1241 * -1 - not executed (unrecognized, bootd recursion or too many args) 1242 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 1243 * considered unrecognized) 1244 * 1245 * WARNING: 1246 * 1247 * We must create a temporary copy of the command since the command we get 1248 * may be the result from getenv(), which returns a pointer directly to 1249 * the environment data, which may change magicly when the command we run 1250 * creates or modifies environment variables (like "bootp" does). 1251 */ 1252 1253 int run_command (const char *cmd, int flag) 1254 { 1255 cmd_tbl_t *cmdtp; 1256 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 1257 char *token; /* start of token in cmdbuf */ 1258 char *sep; /* end of token (separator) in cmdbuf */ 1259 char finaltoken[CFG_CBSIZE]; 1260 char *str = cmdbuf; 1261 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 1262 int argc, inquotes; 1263 int repeatable = 1; 1264 int rc = 0; 1265 1266 #ifdef DEBUG_PARSER 1267 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1268 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1269 puts ("\"\n"); 1270 #endif 1271 1272 clear_ctrlc(); /* forget any previous Control C */ 1273 1274 if (!cmd || !*cmd) { 1275 return -1; /* empty command */ 1276 } 1277 1278 if (strlen(cmd) >= CFG_CBSIZE) { 1279 puts ("## Command too long!\n"); 1280 return -1; 1281 } 1282 1283 strcpy (cmdbuf, cmd); 1284 1285 /* Process separators and check for invalid 1286 * repeatable commands 1287 */ 1288 1289 #ifdef DEBUG_PARSER 1290 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1291 #endif 1292 while (*str) { 1293 1294 /* 1295 * Find separator, or string end 1296 * Allow simple escape of ';' by writing "\;" 1297 */ 1298 for (inquotes = 0, sep = str; *sep; sep++) { 1299 if ((*sep=='\'') && 1300 (*(sep-1) != '\\')) 1301 inquotes=!inquotes; 1302 1303 if (!inquotes && 1304 (*sep == ';') && /* separator */ 1305 ( sep != str) && /* past string start */ 1306 (*(sep-1) != '\\')) /* and NOT escaped */ 1307 break; 1308 } 1309 1310 /* 1311 * Limit the token to data between separators 1312 */ 1313 token = str; 1314 if (*sep) { 1315 str = sep + 1; /* start of command for next pass */ 1316 *sep = '\0'; 1317 } 1318 else 1319 str = sep; /* no more commands for next pass */ 1320 #ifdef DEBUG_PARSER 1321 printf ("token: \"%s\"\n", token); 1322 #endif 1323 1324 /* find macros in this token and replace them */ 1325 process_macros (token, finaltoken); 1326 1327 /* Extract arguments */ 1328 if ((argc = parse_line (finaltoken, argv)) == 0) { 1329 rc = -1; /* no command at all */ 1330 continue; 1331 } 1332 1333 /* Look up command in command table */ 1334 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1335 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1336 rc = -1; /* give up after bad command */ 1337 continue; 1338 } 1339 1340 /* found - check max args */ 1341 if (argc > cmdtp->maxargs) { 1342 printf ("Usage:\n%s\n", cmdtp->usage); 1343 rc = -1; 1344 continue; 1345 } 1346 1347 #if defined(CONFIG_CMD_BOOTD) 1348 /* avoid "bootd" recursion */ 1349 if (cmdtp->cmd == do_bootd) { 1350 #ifdef DEBUG_PARSER 1351 printf ("[%s]\n", finaltoken); 1352 #endif 1353 if (flag & CMD_FLAG_BOOTD) { 1354 puts ("'bootd' recursion detected\n"); 1355 rc = -1; 1356 continue; 1357 } else { 1358 flag |= CMD_FLAG_BOOTD; 1359 } 1360 } 1361 #endif 1362 1363 /* OK - call function to do the command */ 1364 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1365 rc = -1; 1366 } 1367 1368 repeatable &= cmdtp->repeatable; 1369 1370 /* Did the user stop this? */ 1371 if (had_ctrlc ()) 1372 return -1; /* if stopped then not repeatable */ 1373 } 1374 1375 return rc ? rc : repeatable; 1376 } 1377 1378 /****************************************************************************/ 1379 1380 #if defined(CONFIG_CMD_RUN) 1381 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1382 { 1383 int i; 1384 1385 if (argc < 2) { 1386 printf ("Usage:\n%s\n", cmdtp->usage); 1387 return 1; 1388 } 1389 1390 for (i=1; i<argc; ++i) { 1391 char *arg; 1392 1393 if ((arg = getenv (argv[i])) == NULL) { 1394 printf ("## Error: \"%s\" not defined\n", argv[i]); 1395 return 1; 1396 } 1397 #ifndef CFG_HUSH_PARSER 1398 if (run_command (arg, flag) == -1) 1399 return 1; 1400 #else 1401 if (parse_string_outer(arg, 1402 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1403 return 1; 1404 #endif 1405 } 1406 return 0; 1407 } 1408 #endif 1409