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_SILENT_CONSOLE 116 if (gd->flags & GD_FLG_SILENT) { 117 /* Restore serial console */ 118 console_assign (stdout, "serial"); 119 console_assign (stderr, "serial"); 120 } 121 #endif 122 123 # ifdef CONFIG_AUTOBOOT_PROMPT 124 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay); 125 # endif 126 127 # ifdef CONFIG_AUTOBOOT_DELAY_STR 128 if (delaykey[0].str == NULL) 129 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 130 # endif 131 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 132 if (delaykey[1].str == NULL) 133 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 134 # endif 135 # ifdef CONFIG_AUTOBOOT_STOP_STR 136 if (delaykey[2].str == NULL) 137 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 138 # endif 139 # ifdef CONFIG_AUTOBOOT_STOP_STR2 140 if (delaykey[3].str == NULL) 141 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 142 # endif 143 144 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 145 delaykey[i].len = delaykey[i].str == NULL ? 146 0 : strlen (delaykey[i].str); 147 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 148 MAX_DELAY_STOP_STR : delaykey[i].len; 149 150 presskey_max = presskey_max > delaykey[i].len ? 151 presskey_max : delaykey[i].len; 152 153 # if DEBUG_BOOTKEYS 154 printf("%s key:<%s>\n", 155 delaykey[i].retry ? "delay" : "stop", 156 delaykey[i].str ? delaykey[i].str : "NULL"); 157 # endif 158 } 159 160 /* In order to keep up with incoming data, check timeout only 161 * when catch up. 162 */ 163 while (!abort && get_ticks() <= etime) { 164 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 165 if (delaykey[i].len > 0 && 166 presskey_len >= delaykey[i].len && 167 memcmp (presskey + presskey_len - delaykey[i].len, 168 delaykey[i].str, 169 delaykey[i].len) == 0) { 170 # if DEBUG_BOOTKEYS 171 printf("got %skey\n", 172 delaykey[i].retry ? "delay" : "stop"); 173 # endif 174 175 # ifdef CONFIG_BOOT_RETRY_TIME 176 /* don't retry auto boot */ 177 if (! delaykey[i].retry) 178 retry_time = -1; 179 # endif 180 abort = 1; 181 } 182 } 183 184 if (tstc()) { 185 if (presskey_len < presskey_max) { 186 presskey [presskey_len ++] = getc(); 187 } 188 else { 189 for (i = 0; i < presskey_max - 1; i ++) 190 presskey [i] = presskey [i + 1]; 191 192 presskey [i] = getc(); 193 } 194 } 195 } 196 # if DEBUG_BOOTKEYS 197 if (!abort) 198 puts ("key timeout\n"); 199 # endif 200 201 #ifdef CONFIG_SILENT_CONSOLE 202 if (abort) { 203 /* permanently enable normal console output */ 204 gd->flags &= ~(GD_FLG_SILENT); 205 } else if (gd->flags & GD_FLG_SILENT) { 206 /* Restore silent console */ 207 console_assign (stdout, "nulldev"); 208 console_assign (stderr, "nulldev"); 209 } 210 #endif 211 212 return abort; 213 } 214 215 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 216 217 #ifdef CONFIG_MENUKEY 218 static int menukey = 0; 219 #endif 220 221 static __inline__ int abortboot(int bootdelay) 222 { 223 int abort = 0; 224 225 #ifdef CONFIG_SILENT_CONSOLE 226 if (gd->flags & GD_FLG_SILENT) { 227 /* Restore serial console */ 228 console_assign (stdout, "serial"); 229 console_assign (stderr, "serial"); 230 } 231 #endif 232 233 #ifdef CONFIG_MENUPROMPT 234 printf(CONFIG_MENUPROMPT, bootdelay); 235 #else 236 printf("Hit any key to stop autoboot: %2d ", bootdelay); 237 #endif 238 239 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 240 /* 241 * Check if key already pressed 242 * Don't check if bootdelay < 0 243 */ 244 if (bootdelay >= 0) { 245 if (tstc()) { /* we got a key press */ 246 (void) getc(); /* consume input */ 247 puts ("\b\b\b 0"); 248 abort = 1; /* don't auto boot */ 249 } 250 } 251 #endif 252 253 while ((bootdelay > 0) && (!abort)) { 254 int i; 255 256 --bootdelay; 257 /* delay 100 * 10ms */ 258 for (i=0; !abort && i<100; ++i) { 259 if (tstc()) { /* we got a key press */ 260 abort = 1; /* don't auto boot */ 261 bootdelay = 0; /* no more delay */ 262 # ifdef CONFIG_MENUKEY 263 menukey = getc(); 264 # else 265 (void) getc(); /* consume input */ 266 # endif 267 break; 268 } 269 udelay (10000); 270 } 271 272 printf ("\b\b\b%2d ", bootdelay); 273 } 274 275 putc ('\n'); 276 277 #ifdef CONFIG_SILENT_CONSOLE 278 if (abort) { 279 /* permanently enable normal console output */ 280 gd->flags &= ~(GD_FLG_SILENT); 281 } else if (gd->flags & GD_FLG_SILENT) { 282 /* Restore silent console */ 283 console_assign (stdout, "nulldev"); 284 console_assign (stderr, "nulldev"); 285 } 286 #endif 287 288 return abort; 289 } 290 # endif /* CONFIG_AUTOBOOT_KEYED */ 291 #endif /* CONFIG_BOOTDELAY >= 0 */ 292 293 /****************************************************************************/ 294 295 void main_loop (void) 296 { 297 #ifndef CFG_HUSH_PARSER 298 static char lastcommand[CFG_CBSIZE] = { 0, }; 299 int len; 300 int rc = 1; 301 int flag; 302 #endif 303 304 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 305 char *s; 306 int bootdelay; 307 #endif 308 #ifdef CONFIG_PREBOOT 309 char *p; 310 #endif 311 #ifdef CONFIG_BOOTCOUNT_LIMIT 312 unsigned long bootcount = 0; 313 unsigned long bootlimit = 0; 314 char *bcs; 315 char bcs_set[16]; 316 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 317 318 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 319 ulong bmp = 0; /* default bitmap */ 320 extern int trab_vfd (ulong bitmap); 321 322 #ifdef CONFIG_MODEM_SUPPORT 323 if (do_mdm_init) 324 bmp = 1; /* alternate bitmap */ 325 #endif 326 trab_vfd (bmp); 327 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 328 329 #ifdef CONFIG_BOOTCOUNT_LIMIT 330 bootcount = bootcount_load(); 331 bootcount++; 332 bootcount_store (bootcount); 333 sprintf (bcs_set, "%lu", bootcount); 334 setenv ("bootcount", bcs_set); 335 bcs = getenv ("bootlimit"); 336 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 337 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 338 339 #ifdef CONFIG_MODEM_SUPPORT 340 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 341 if (do_mdm_init) { 342 char *str = strdup(getenv("mdm_cmd")); 343 setenv ("preboot", str); /* set or delete definition */ 344 if (str != NULL) 345 free (str); 346 mdm_init(); /* wait for modem connection */ 347 } 348 #endif /* CONFIG_MODEM_SUPPORT */ 349 350 #ifdef CONFIG_VERSION_VARIABLE 351 { 352 extern char version_string[]; 353 354 setenv ("ver", version_string); /* set version variable */ 355 } 356 #endif /* CONFIG_VERSION_VARIABLE */ 357 358 #ifdef CFG_HUSH_PARSER 359 u_boot_hush_start (); 360 #endif 361 362 #ifdef CONFIG_AUTO_COMPLETE 363 install_auto_complete(); 364 #endif 365 366 #ifdef CONFIG_PREBOOT 367 if ((p = getenv ("preboot")) != NULL) { 368 # ifdef CONFIG_AUTOBOOT_KEYED 369 int prev = disable_ctrlc(1); /* disable Control C checking */ 370 # endif 371 372 # ifndef CFG_HUSH_PARSER 373 run_command (p, 0); 374 # else 375 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 376 FLAG_EXIT_FROM_LOOP); 377 # endif 378 379 # ifdef CONFIG_AUTOBOOT_KEYED 380 disable_ctrlc(prev); /* restore Control C checking */ 381 # endif 382 } 383 #endif /* CONFIG_PREBOOT */ 384 385 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 386 s = getenv ("bootdelay"); 387 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 388 389 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 390 391 # ifdef CONFIG_BOOT_RETRY_TIME 392 init_cmd_timeout (); 393 # endif /* CONFIG_BOOT_RETRY_TIME */ 394 395 #ifdef CONFIG_BOOTCOUNT_LIMIT 396 if (bootlimit && (bootcount > bootlimit)) { 397 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 398 (unsigned)bootlimit); 399 s = getenv ("altbootcmd"); 400 } 401 else 402 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 403 s = getenv ("bootcmd"); 404 405 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 406 407 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 408 # ifdef CONFIG_AUTOBOOT_KEYED 409 int prev = disable_ctrlc(1); /* disable Control C checking */ 410 # endif 411 412 # ifndef CFG_HUSH_PARSER 413 run_command (s, 0); 414 # else 415 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 416 FLAG_EXIT_FROM_LOOP); 417 # endif 418 419 # ifdef CONFIG_AUTOBOOT_KEYED 420 disable_ctrlc(prev); /* restore Control C checking */ 421 # endif 422 } 423 424 # ifdef CONFIG_MENUKEY 425 if (menukey == CONFIG_MENUKEY) { 426 s = getenv("menucmd"); 427 if (s) { 428 # ifndef CFG_HUSH_PARSER 429 run_command (s, 0); 430 # else 431 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 432 FLAG_EXIT_FROM_LOOP); 433 # endif 434 } 435 } 436 #endif /* CONFIG_MENUKEY */ 437 #endif /* CONFIG_BOOTDELAY */ 438 439 #ifdef CONFIG_AMIGAONEG3SE 440 { 441 extern void video_banner(void); 442 video_banner(); 443 } 444 #endif 445 446 /* 447 * Main Loop for Monitor Command Processing 448 */ 449 #ifdef CFG_HUSH_PARSER 450 parse_file_outer(); 451 /* This point is never reached */ 452 for (;;); 453 #else 454 for (;;) { 455 #ifdef CONFIG_BOOT_RETRY_TIME 456 if (rc >= 0) { 457 /* Saw enough of a valid command to 458 * restart the timeout. 459 */ 460 reset_cmd_timeout(); 461 } 462 #endif 463 len = readline (CFG_PROMPT); 464 465 flag = 0; /* assume no special flags for now */ 466 if (len > 0) 467 strcpy (lastcommand, console_buffer); 468 else if (len == 0) 469 flag |= CMD_FLAG_REPEAT; 470 #ifdef CONFIG_BOOT_RETRY_TIME 471 else if (len == -2) { 472 /* -2 means timed out, retry autoboot 473 */ 474 puts ("\nTimed out waiting for command\n"); 475 # ifdef CONFIG_RESET_TO_RETRY 476 /* Reinit board to run initialization code again */ 477 do_reset (NULL, 0, 0, NULL); 478 # else 479 return; /* retry autoboot */ 480 # endif 481 } 482 #endif 483 484 if (len == -1) 485 puts ("<INTERRUPT>\n"); 486 else 487 rc = run_command (lastcommand, flag); 488 489 if (rc <= 0) { 490 /* invalid command or not repeatable, forget it */ 491 lastcommand[0] = 0; 492 } 493 } 494 #endif /*CFG_HUSH_PARSER*/ 495 } 496 497 #ifdef CONFIG_BOOT_RETRY_TIME 498 /*************************************************************************** 499 * initialize command line timeout 500 */ 501 void init_cmd_timeout(void) 502 { 503 char *s = getenv ("bootretry"); 504 505 if (s != NULL) 506 retry_time = (int)simple_strtol(s, NULL, 10); 507 else 508 retry_time = CONFIG_BOOT_RETRY_TIME; 509 510 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 511 retry_time = CONFIG_BOOT_RETRY_MIN; 512 } 513 514 /*************************************************************************** 515 * reset command line timeout to retry_time seconds 516 */ 517 void reset_cmd_timeout(void) 518 { 519 endtime = endtick(retry_time); 520 } 521 #endif 522 523 #ifdef CONFIG_CMDLINE_EDITING 524 525 /* 526 * cmdline-editing related codes from vivi. 527 * Author: Janghoon Lyu <nandy@mizi.com> 528 */ 529 530 #define putnstr(str,n) do { \ 531 printf ("%.*s", n, str); \ 532 } while (0) 533 534 #define CTL_CH(c) ((c) - 'a' + 1) 535 536 #define MAX_CMDBUF_SIZE 256 537 538 #define CTL_BACKSPACE ('\b') 539 #define DEL ((char)255) 540 #define DEL7 ((char)127) 541 #define CREAD_HIST_CHAR ('!') 542 543 #define getcmd_putch(ch) putc(ch) 544 #define getcmd_getch() getc() 545 #define getcmd_cbeep() getcmd_putch('\a') 546 547 #define HIST_MAX 20 548 #define HIST_SIZE MAX_CMDBUF_SIZE 549 550 static int hist_max = 0; 551 static int hist_add_idx = 0; 552 static int hist_cur = -1; 553 unsigned hist_num = 0; 554 555 char* hist_list[HIST_MAX]; 556 char hist_lines[HIST_MAX][HIST_SIZE]; 557 558 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 559 560 static void hist_init(void) 561 { 562 int i; 563 564 hist_max = 0; 565 hist_add_idx = 0; 566 hist_cur = -1; 567 hist_num = 0; 568 569 for (i = 0; i < HIST_MAX; i++) { 570 hist_list[i] = hist_lines[i]; 571 hist_list[i][0] = '\0'; 572 } 573 } 574 575 static void cread_add_to_hist(char *line) 576 { 577 strcpy(hist_list[hist_add_idx], line); 578 579 if (++hist_add_idx >= HIST_MAX) 580 hist_add_idx = 0; 581 582 if (hist_add_idx > hist_max) 583 hist_max = hist_add_idx; 584 585 hist_num++; 586 } 587 588 static char* hist_prev(void) 589 { 590 char *ret; 591 int old_cur; 592 593 if (hist_cur < 0) 594 return NULL; 595 596 old_cur = hist_cur; 597 if (--hist_cur < 0) 598 hist_cur = hist_max; 599 600 if (hist_cur == hist_add_idx) { 601 hist_cur = old_cur; 602 ret = NULL; 603 } else 604 ret = hist_list[hist_cur]; 605 606 return (ret); 607 } 608 609 static char* hist_next(void) 610 { 611 char *ret; 612 613 if (hist_cur < 0) 614 return NULL; 615 616 if (hist_cur == hist_add_idx) 617 return NULL; 618 619 if (++hist_cur > hist_max) 620 hist_cur = 0; 621 622 if (hist_cur == hist_add_idx) { 623 ret = ""; 624 } else 625 ret = hist_list[hist_cur]; 626 627 return (ret); 628 } 629 630 #ifndef CONFIG_CMDLINE_EDITING 631 static void cread_print_hist_list(void) 632 { 633 int i; 634 unsigned long n; 635 636 n = hist_num - hist_max; 637 638 i = hist_add_idx + 1; 639 while (1) { 640 if (i > hist_max) 641 i = 0; 642 if (i == hist_add_idx) 643 break; 644 printf("%s\n", hist_list[i]); 645 n++; 646 i++; 647 } 648 } 649 #endif /* CONFIG_CMDLINE_EDITING */ 650 651 #define BEGINNING_OF_LINE() { \ 652 while (num) { \ 653 getcmd_putch(CTL_BACKSPACE); \ 654 num--; \ 655 } \ 656 } 657 658 #define ERASE_TO_EOL() { \ 659 if (num < eol_num) { \ 660 int tmp; \ 661 for (tmp = num; tmp < eol_num; tmp++) \ 662 getcmd_putch(' '); \ 663 while (tmp-- > num) \ 664 getcmd_putch(CTL_BACKSPACE); \ 665 eol_num = num; \ 666 } \ 667 } 668 669 #define REFRESH_TO_EOL() { \ 670 if (num < eol_num) { \ 671 wlen = eol_num - num; \ 672 putnstr(buf + num, wlen); \ 673 num = eol_num; \ 674 } \ 675 } 676 677 static void cread_add_char(char ichar, int insert, unsigned long *num, 678 unsigned long *eol_num, char *buf, unsigned long len) 679 { 680 unsigned long wlen; 681 682 /* room ??? */ 683 if (insert || *num == *eol_num) { 684 if (*eol_num > len - 1) { 685 getcmd_cbeep(); 686 return; 687 } 688 (*eol_num)++; 689 } 690 691 if (insert) { 692 wlen = *eol_num - *num; 693 if (wlen > 1) { 694 memmove(&buf[*num+1], &buf[*num], wlen-1); 695 } 696 697 buf[*num] = ichar; 698 putnstr(buf + *num, wlen); 699 (*num)++; 700 while (--wlen) { 701 getcmd_putch(CTL_BACKSPACE); 702 } 703 } else { 704 /* echo the character */ 705 wlen = 1; 706 buf[*num] = ichar; 707 putnstr(buf + *num, wlen); 708 (*num)++; 709 } 710 } 711 712 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 713 unsigned long *eol_num, char *buf, unsigned long len) 714 { 715 while (strsize--) { 716 cread_add_char(*str, insert, num, eol_num, buf, len); 717 str++; 718 } 719 } 720 721 static int cread_line(char *buf, unsigned int *len) 722 { 723 unsigned long num = 0; 724 unsigned long eol_num = 0; 725 unsigned long rlen; 726 unsigned long wlen; 727 char ichar; 728 int insert = 1; 729 int esc_len = 0; 730 int rc = 0; 731 char esc_save[8]; 732 733 while (1) { 734 rlen = 1; 735 ichar = getcmd_getch(); 736 737 if ((ichar == '\n') || (ichar == '\r')) { 738 putc('\n'); 739 break; 740 } 741 742 /* 743 * handle standard linux xterm esc sequences for arrow key, etc. 744 */ 745 if (esc_len != 0) { 746 if (esc_len == 1) { 747 if (ichar == '[') { 748 esc_save[esc_len] = ichar; 749 esc_len = 2; 750 } else { 751 cread_add_str(esc_save, esc_len, insert, 752 &num, &eol_num, buf, *len); 753 esc_len = 0; 754 } 755 continue; 756 } 757 758 switch (ichar) { 759 760 case 'D': /* <- key */ 761 ichar = CTL_CH('b'); 762 esc_len = 0; 763 break; 764 case 'C': /* -> key */ 765 ichar = CTL_CH('f'); 766 esc_len = 0; 767 break; /* pass off to ^F handler */ 768 case 'H': /* Home key */ 769 ichar = CTL_CH('a'); 770 esc_len = 0; 771 break; /* pass off to ^A handler */ 772 case 'A': /* up arrow */ 773 ichar = CTL_CH('p'); 774 esc_len = 0; 775 break; /* pass off to ^P handler */ 776 case 'B': /* down arrow */ 777 ichar = CTL_CH('n'); 778 esc_len = 0; 779 break; /* pass off to ^N handler */ 780 default: 781 esc_save[esc_len++] = ichar; 782 cread_add_str(esc_save, esc_len, insert, 783 &num, &eol_num, buf, *len); 784 esc_len = 0; 785 continue; 786 } 787 } 788 789 switch (ichar) { 790 case 0x1b: 791 if (esc_len == 0) { 792 esc_save[esc_len] = ichar; 793 esc_len = 1; 794 } else { 795 puts("impossible condition #876\n"); 796 esc_len = 0; 797 } 798 break; 799 800 case CTL_CH('a'): 801 BEGINNING_OF_LINE(); 802 break; 803 case CTL_CH('c'): /* ^C - break */ 804 *buf = '\0'; /* discard input */ 805 return (-1); 806 case CTL_CH('f'): 807 if (num < eol_num) { 808 getcmd_putch(buf[num]); 809 num++; 810 } 811 break; 812 case CTL_CH('b'): 813 if (num) { 814 getcmd_putch(CTL_BACKSPACE); 815 num--; 816 } 817 break; 818 case CTL_CH('d'): 819 if (num < eol_num) { 820 wlen = eol_num - num - 1; 821 if (wlen) { 822 memmove(&buf[num], &buf[num+1], wlen); 823 putnstr(buf + num, wlen); 824 } 825 826 getcmd_putch(' '); 827 do { 828 getcmd_putch(CTL_BACKSPACE); 829 } while (wlen--); 830 eol_num--; 831 } 832 break; 833 case CTL_CH('k'): 834 ERASE_TO_EOL(); 835 break; 836 case CTL_CH('e'): 837 REFRESH_TO_EOL(); 838 break; 839 case CTL_CH('o'): 840 insert = !insert; 841 break; 842 case CTL_CH('x'): 843 BEGINNING_OF_LINE(); 844 ERASE_TO_EOL(); 845 break; 846 case DEL: 847 case DEL7: 848 case 8: 849 if (num) { 850 wlen = eol_num - num; 851 num--; 852 memmove(&buf[num], &buf[num+1], wlen); 853 getcmd_putch(CTL_BACKSPACE); 854 putnstr(buf + num, wlen); 855 getcmd_putch(' '); 856 do { 857 getcmd_putch(CTL_BACKSPACE); 858 } while (wlen--); 859 eol_num--; 860 } 861 break; 862 case CTL_CH('p'): 863 case CTL_CH('n'): 864 { 865 char * hline; 866 867 esc_len = 0; 868 869 if (ichar == CTL_CH('p')) 870 hline = hist_prev(); 871 else 872 hline = hist_next(); 873 874 if (!hline) { 875 getcmd_cbeep(); 876 continue; 877 } 878 879 /* nuke the current line */ 880 /* first, go home */ 881 BEGINNING_OF_LINE(); 882 883 /* erase to end of line */ 884 ERASE_TO_EOL(); 885 886 /* copy new line into place and display */ 887 strcpy(buf, hline); 888 eol_num = strlen(buf); 889 REFRESH_TO_EOL(); 890 continue; 891 } 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(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 1223 #ifdef DEBUG_PARSER 1224 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1225 strlen (output_start), output_start); 1226 #endif 1227 } 1228 1229 /**************************************************************************** 1230 * returns: 1231 * 1 - command executed, repeatable 1232 * 0 - command executed but not repeatable, interrupted commands are 1233 * always considered not repeatable 1234 * -1 - not executed (unrecognized, bootd recursion or too many args) 1235 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 1236 * considered unrecognized) 1237 * 1238 * WARNING: 1239 * 1240 * We must create a temporary copy of the command since the command we get 1241 * may be the result from getenv(), which returns a pointer directly to 1242 * the environment data, which may change magicly when the command we run 1243 * creates or modifies environment variables (like "bootp" does). 1244 */ 1245 1246 int run_command (const char *cmd, int flag) 1247 { 1248 cmd_tbl_t *cmdtp; 1249 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 1250 char *token; /* start of token in cmdbuf */ 1251 char *sep; /* end of token (separator) in cmdbuf */ 1252 char finaltoken[CFG_CBSIZE]; 1253 char *str = cmdbuf; 1254 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 1255 int argc, inquotes; 1256 int repeatable = 1; 1257 int rc = 0; 1258 1259 #ifdef DEBUG_PARSER 1260 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1261 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1262 puts ("\"\n"); 1263 #endif 1264 1265 clear_ctrlc(); /* forget any previous Control C */ 1266 1267 if (!cmd || !*cmd) { 1268 return -1; /* empty command */ 1269 } 1270 1271 if (strlen(cmd) >= CFG_CBSIZE) { 1272 puts ("## Command too long!\n"); 1273 return -1; 1274 } 1275 1276 strcpy (cmdbuf, cmd); 1277 1278 /* Process separators and check for invalid 1279 * repeatable commands 1280 */ 1281 1282 #ifdef DEBUG_PARSER 1283 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1284 #endif 1285 while (*str) { 1286 1287 /* 1288 * Find separator, or string end 1289 * Allow simple escape of ';' by writing "\;" 1290 */ 1291 for (inquotes = 0, sep = str; *sep; sep++) { 1292 if ((*sep=='\'') && 1293 (*(sep-1) != '\\')) 1294 inquotes=!inquotes; 1295 1296 if (!inquotes && 1297 (*sep == ';') && /* separator */ 1298 ( sep != str) && /* past string start */ 1299 (*(sep-1) != '\\')) /* and NOT escaped */ 1300 break; 1301 } 1302 1303 /* 1304 * Limit the token to data between separators 1305 */ 1306 token = str; 1307 if (*sep) { 1308 str = sep + 1; /* start of command for next pass */ 1309 *sep = '\0'; 1310 } 1311 else 1312 str = sep; /* no more commands for next pass */ 1313 #ifdef DEBUG_PARSER 1314 printf ("token: \"%s\"\n", token); 1315 #endif 1316 1317 /* find macros in this token and replace them */ 1318 process_macros (token, finaltoken); 1319 1320 /* Extract arguments */ 1321 if ((argc = parse_line (finaltoken, argv)) == 0) { 1322 rc = -1; /* no command at all */ 1323 continue; 1324 } 1325 1326 /* Look up command in command table */ 1327 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1328 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1329 rc = -1; /* give up after bad command */ 1330 continue; 1331 } 1332 1333 /* found - check max args */ 1334 if (argc > cmdtp->maxargs) { 1335 printf ("Usage:\n%s\n", cmdtp->usage); 1336 rc = -1; 1337 continue; 1338 } 1339 1340 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 1341 /* avoid "bootd" recursion */ 1342 if (cmdtp->cmd == do_bootd) { 1343 #ifdef DEBUG_PARSER 1344 printf ("[%s]\n", finaltoken); 1345 #endif 1346 if (flag & CMD_FLAG_BOOTD) { 1347 puts ("'bootd' recursion detected\n"); 1348 rc = -1; 1349 continue; 1350 } else { 1351 flag |= CMD_FLAG_BOOTD; 1352 } 1353 } 1354 #endif /* CFG_CMD_BOOTD */ 1355 1356 /* OK - call function to do the command */ 1357 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1358 rc = -1; 1359 } 1360 1361 repeatable &= cmdtp->repeatable; 1362 1363 /* Did the user stop this? */ 1364 if (had_ctrlc ()) 1365 return 0; /* if stopped then not repeatable */ 1366 } 1367 1368 return rc ? rc : repeatable; 1369 } 1370 1371 /****************************************************************************/ 1372 1373 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 1374 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1375 { 1376 int i; 1377 1378 if (argc < 2) { 1379 printf ("Usage:\n%s\n", cmdtp->usage); 1380 return 1; 1381 } 1382 1383 for (i=1; i<argc; ++i) { 1384 char *arg; 1385 1386 if ((arg = getenv (argv[i])) == NULL) { 1387 printf ("## Error: \"%s\" not defined\n", argv[i]); 1388 return 1; 1389 } 1390 #ifndef CFG_HUSH_PARSER 1391 if (run_command (arg, flag) == -1) 1392 return 1; 1393 #else 1394 if (parse_string_outer(arg, 1395 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1396 return 1; 1397 #endif 1398 } 1399 return 0; 1400 } 1401 #endif /* CFG_CMD_RUN */ 1402