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