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 CONFIG_SYS_HUSH_PARSER 38 #include <hush.h> 39 #endif 40 41 #include <post.h> 42 43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING) 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 show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress"))); 52 53 #if defined(CONFIG_UPDATE_TFTP) 54 void update_tftp (void); 55 #endif /* CONFIG_UPDATE_TFTP */ 56 57 #define MAX_DELAY_STOP_STR 32 58 59 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 60 static int abortboot(int); 61 #endif 62 63 #undef DEBUG_PARSER 64 65 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ 66 67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 68 static char erase_seq[] = "\b \b"; /* erase sequence */ 69 static char tab_seq[] = " "; /* used to expand TABs */ 70 71 #ifdef CONFIG_BOOT_RETRY_TIME 72 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 73 static int retry_time = -1; /* -1 so can call readline before main_loop */ 74 #endif 75 76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 77 78 #ifndef CONFIG_BOOT_RETRY_MIN 79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 80 #endif 81 82 #ifdef CONFIG_MODEM_SUPPORT 83 int do_mdm_init = 0; 84 extern void mdm_init(void); /* defined in board.c */ 85 #endif 86 87 /*************************************************************************** 88 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 89 * returns: 0 - no key string, allow autoboot 90 * 1 - got key string, abort 91 */ 92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 93 # if defined(CONFIG_AUTOBOOT_KEYED) 94 static __inline__ int abortboot(int bootdelay) 95 { 96 int abort = 0; 97 uint64_t etime = endtick(bootdelay); 98 struct { 99 char* str; 100 u_int len; 101 int retry; 102 } 103 delaykey [] = { 104 { str: getenv ("bootdelaykey"), retry: 1 }, 105 { str: getenv ("bootdelaykey2"), retry: 1 }, 106 { str: getenv ("bootstopkey"), retry: 0 }, 107 { str: getenv ("bootstopkey2"), retry: 0 }, 108 }; 109 110 char presskey [MAX_DELAY_STOP_STR]; 111 u_int presskey_len = 0; 112 u_int presskey_max = 0; 113 u_int i; 114 115 # ifdef CONFIG_AUTOBOOT_PROMPT 116 printf(CONFIG_AUTOBOOT_PROMPT); 117 # endif 118 119 # ifdef CONFIG_AUTOBOOT_DELAY_STR 120 if (delaykey[0].str == NULL) 121 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 122 # endif 123 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 124 if (delaykey[1].str == NULL) 125 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 126 # endif 127 # ifdef CONFIG_AUTOBOOT_STOP_STR 128 if (delaykey[2].str == NULL) 129 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 130 # endif 131 # ifdef CONFIG_AUTOBOOT_STOP_STR2 132 if (delaykey[3].str == NULL) 133 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 134 # endif 135 136 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 137 delaykey[i].len = delaykey[i].str == NULL ? 138 0 : strlen (delaykey[i].str); 139 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 140 MAX_DELAY_STOP_STR : delaykey[i].len; 141 142 presskey_max = presskey_max > delaykey[i].len ? 143 presskey_max : delaykey[i].len; 144 145 # if DEBUG_BOOTKEYS 146 printf("%s key:<%s>\n", 147 delaykey[i].retry ? "delay" : "stop", 148 delaykey[i].str ? delaykey[i].str : "NULL"); 149 # endif 150 } 151 152 /* In order to keep up with incoming data, check timeout only 153 * when catch up. 154 */ 155 do { 156 if (tstc()) { 157 if (presskey_len < presskey_max) { 158 presskey [presskey_len ++] = getc(); 159 } 160 else { 161 for (i = 0; i < presskey_max - 1; i ++) 162 presskey [i] = presskey [i + 1]; 163 164 presskey [i] = getc(); 165 } 166 } 167 168 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 169 if (delaykey[i].len > 0 && 170 presskey_len >= delaykey[i].len && 171 memcmp (presskey + presskey_len - delaykey[i].len, 172 delaykey[i].str, 173 delaykey[i].len) == 0) { 174 # if DEBUG_BOOTKEYS 175 printf("got %skey\n", 176 delaykey[i].retry ? "delay" : "stop"); 177 # endif 178 179 # ifdef CONFIG_BOOT_RETRY_TIME 180 /* don't retry auto boot */ 181 if (! delaykey[i].retry) 182 retry_time = -1; 183 # endif 184 abort = 1; 185 } 186 } 187 } while (!abort && get_ticks() <= etime); 188 189 # if DEBUG_BOOTKEYS 190 if (!abort) 191 puts("key timeout\n"); 192 # endif 193 194 #ifdef CONFIG_SILENT_CONSOLE 195 if (abort) 196 gd->flags &= ~GD_FLG_SILENT; 197 #endif 198 199 return abort; 200 } 201 202 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 203 204 #ifdef CONFIG_MENUKEY 205 static int menukey = 0; 206 #endif 207 208 static __inline__ int abortboot(int bootdelay) 209 { 210 int abort = 0; 211 212 #ifdef CONFIG_MENUPROMPT 213 printf(CONFIG_MENUPROMPT); 214 #else 215 printf("Hit any key to stop autoboot: %2d ", bootdelay); 216 #endif 217 218 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 219 /* 220 * Check if key already pressed 221 * Don't check if bootdelay < 0 222 */ 223 if (bootdelay >= 0) { 224 if (tstc()) { /* we got a key press */ 225 (void) getc(); /* consume input */ 226 puts ("\b\b\b 0"); 227 abort = 1; /* don't auto boot */ 228 } 229 } 230 #endif 231 232 while ((bootdelay > 0) && (!abort)) { 233 int i; 234 235 --bootdelay; 236 /* delay 100 * 10ms */ 237 for (i=0; !abort && i<100; ++i) { 238 if (tstc()) { /* we got a key press */ 239 abort = 1; /* don't auto boot */ 240 bootdelay = 0; /* no more delay */ 241 # ifdef CONFIG_MENUKEY 242 menukey = getc(); 243 # else 244 (void) getc(); /* consume input */ 245 # endif 246 break; 247 } 248 udelay(10000); 249 } 250 251 printf("\b\b\b%2d ", bootdelay); 252 } 253 254 putc('\n'); 255 256 #ifdef CONFIG_SILENT_CONSOLE 257 if (abort) 258 gd->flags &= ~GD_FLG_SILENT; 259 #endif 260 261 return abort; 262 } 263 # endif /* CONFIG_AUTOBOOT_KEYED */ 264 #endif /* CONFIG_BOOTDELAY >= 0 */ 265 266 /****************************************************************************/ 267 268 void main_loop (void) 269 { 270 #ifndef CONFIG_SYS_HUSH_PARSER 271 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, }; 272 int len; 273 int rc = 1; 274 int flag; 275 #endif 276 277 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 278 char *s; 279 int bootdelay; 280 #endif 281 #ifdef CONFIG_PREBOOT 282 char *p; 283 #endif 284 #ifdef CONFIG_BOOTCOUNT_LIMIT 285 unsigned long bootcount = 0; 286 unsigned long bootlimit = 0; 287 char *bcs; 288 char bcs_set[16]; 289 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 290 291 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 292 ulong bmp = 0; /* default bitmap */ 293 extern int trab_vfd (ulong bitmap); 294 295 #ifdef CONFIG_MODEM_SUPPORT 296 if (do_mdm_init) 297 bmp = 1; /* alternate bitmap */ 298 #endif 299 trab_vfd (bmp); 300 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 301 302 #ifdef CONFIG_BOOTCOUNT_LIMIT 303 bootcount = bootcount_load(); 304 bootcount++; 305 bootcount_store (bootcount); 306 sprintf (bcs_set, "%lu", bootcount); 307 setenv ("bootcount", bcs_set); 308 bcs = getenv ("bootlimit"); 309 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 310 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 311 312 #ifdef CONFIG_MODEM_SUPPORT 313 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 314 if (do_mdm_init) { 315 char *str = strdup(getenv("mdm_cmd")); 316 setenv ("preboot", str); /* set or delete definition */ 317 if (str != NULL) 318 free (str); 319 mdm_init(); /* wait for modem connection */ 320 } 321 #endif /* CONFIG_MODEM_SUPPORT */ 322 323 #ifdef CONFIG_VERSION_VARIABLE 324 { 325 extern char version_string[]; 326 327 setenv ("ver", version_string); /* set version variable */ 328 } 329 #endif /* CONFIG_VERSION_VARIABLE */ 330 331 #ifdef CONFIG_SYS_HUSH_PARSER 332 u_boot_hush_start (); 333 #endif 334 335 #if defined(CONFIG_HUSH_INIT_VAR) 336 hush_init_var (); 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 CONFIG_SYS_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_UPDATE_TFTP) 363 update_tftp (); 364 #endif /* CONFIG_UPDATE_TFTP */ 365 366 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 367 s = getenv ("bootdelay"); 368 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 369 370 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 371 372 # ifdef CONFIG_BOOT_RETRY_TIME 373 init_cmd_timeout (); 374 # endif /* CONFIG_BOOT_RETRY_TIME */ 375 376 #ifdef CONFIG_POST 377 if (gd->flags & GD_FLG_POSTFAIL) { 378 s = getenv("failbootcmd"); 379 } 380 else 381 #endif /* CONFIG_POST */ 382 #ifdef CONFIG_BOOTCOUNT_LIMIT 383 if (bootlimit && (bootcount > bootlimit)) { 384 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 385 (unsigned)bootlimit); 386 s = getenv ("altbootcmd"); 387 } 388 else 389 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 390 s = getenv ("bootcmd"); 391 392 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 393 394 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 395 # ifdef CONFIG_AUTOBOOT_KEYED 396 int prev = disable_ctrlc(1); /* disable Control C checking */ 397 # endif 398 399 # ifndef CONFIG_SYS_HUSH_PARSER 400 run_command (s, 0); 401 # else 402 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 403 FLAG_EXIT_FROM_LOOP); 404 # endif 405 406 # ifdef CONFIG_AUTOBOOT_KEYED 407 disable_ctrlc(prev); /* restore Control C checking */ 408 # endif 409 } 410 411 # ifdef CONFIG_MENUKEY 412 if (menukey == CONFIG_MENUKEY) { 413 s = getenv("menucmd"); 414 if (s) { 415 # ifndef CONFIG_SYS_HUSH_PARSER 416 run_command (s, 0); 417 # else 418 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 419 FLAG_EXIT_FROM_LOOP); 420 # endif 421 } 422 } 423 #endif /* CONFIG_MENUKEY */ 424 #endif /* CONFIG_BOOTDELAY */ 425 426 /* 427 * Main Loop for Monitor Command Processing 428 */ 429 #ifdef CONFIG_SYS_HUSH_PARSER 430 parse_file_outer(); 431 /* This point is never reached */ 432 for (;;); 433 #else 434 for (;;) { 435 #ifdef CONFIG_BOOT_RETRY_TIME 436 if (rc >= 0) { 437 /* Saw enough of a valid command to 438 * restart the timeout. 439 */ 440 reset_cmd_timeout(); 441 } 442 #endif 443 len = readline (CONFIG_SYS_PROMPT); 444 445 flag = 0; /* assume no special flags for now */ 446 if (len > 0) 447 strcpy (lastcommand, console_buffer); 448 else if (len == 0) 449 flag |= CMD_FLAG_REPEAT; 450 #ifdef CONFIG_BOOT_RETRY_TIME 451 else if (len == -2) { 452 /* -2 means timed out, retry autoboot 453 */ 454 puts ("\nTimed out waiting for command\n"); 455 # ifdef CONFIG_RESET_TO_RETRY 456 /* Reinit board to run initialization code again */ 457 do_reset (NULL, 0, 0, NULL); 458 # else 459 return; /* retry autoboot */ 460 # endif 461 } 462 #endif 463 464 if (len == -1) 465 puts ("<INTERRUPT>\n"); 466 else 467 rc = run_command (lastcommand, flag); 468 469 if (rc <= 0) { 470 /* invalid command or not repeatable, forget it */ 471 lastcommand[0] = 0; 472 } 473 } 474 #endif /*CONFIG_SYS_HUSH_PARSER*/ 475 } 476 477 #ifdef CONFIG_BOOT_RETRY_TIME 478 /*************************************************************************** 479 * initialize command line timeout 480 */ 481 void init_cmd_timeout(void) 482 { 483 char *s = getenv ("bootretry"); 484 485 if (s != NULL) 486 retry_time = (int)simple_strtol(s, NULL, 10); 487 else 488 retry_time = CONFIG_BOOT_RETRY_TIME; 489 490 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 491 retry_time = CONFIG_BOOT_RETRY_MIN; 492 } 493 494 /*************************************************************************** 495 * reset command line timeout to retry_time seconds 496 */ 497 void reset_cmd_timeout(void) 498 { 499 endtime = endtick(retry_time); 500 } 501 #endif 502 503 #ifdef CONFIG_CMDLINE_EDITING 504 505 /* 506 * cmdline-editing related codes from vivi. 507 * Author: Janghoon Lyu <nandy@mizi.com> 508 */ 509 510 #define putnstr(str,n) do { \ 511 printf ("%.*s", (int)n, str); \ 512 } while (0) 513 514 #define CTL_CH(c) ((c) - 'a' + 1) 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 CONFIG_SYS_CBSIZE 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 + 1]; /* Save room for NULL */ 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 printf("%*s", (int)(eol_num - num), ""); \ 638 do { \ 639 getcmd_putch(CTL_BACKSPACE); \ 640 } while (--eol_num > num); \ 641 } \ 642 } 643 644 #define REFRESH_TO_EOL() { \ 645 if (num < eol_num) { \ 646 wlen = eol_num - num; \ 647 putnstr(buf + num, wlen); \ 648 num = eol_num; \ 649 } \ 650 } 651 652 static void cread_add_char(char ichar, int insert, unsigned long *num, 653 unsigned long *eol_num, char *buf, unsigned long len) 654 { 655 unsigned long wlen; 656 657 /* room ??? */ 658 if (insert || *num == *eol_num) { 659 if (*eol_num > len - 1) { 660 getcmd_cbeep(); 661 return; 662 } 663 (*eol_num)++; 664 } 665 666 if (insert) { 667 wlen = *eol_num - *num; 668 if (wlen > 1) { 669 memmove(&buf[*num+1], &buf[*num], wlen-1); 670 } 671 672 buf[*num] = ichar; 673 putnstr(buf + *num, wlen); 674 (*num)++; 675 while (--wlen) { 676 getcmd_putch(CTL_BACKSPACE); 677 } 678 } else { 679 /* echo the character */ 680 wlen = 1; 681 buf[*num] = ichar; 682 putnstr(buf + *num, wlen); 683 (*num)++; 684 } 685 } 686 687 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 688 unsigned long *eol_num, char *buf, unsigned long len) 689 { 690 while (strsize--) { 691 cread_add_char(*str, insert, num, eol_num, buf, len); 692 str++; 693 } 694 } 695 696 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 697 { 698 unsigned long num = 0; 699 unsigned long eol_num = 0; 700 unsigned long wlen; 701 char ichar; 702 int insert = 1; 703 int esc_len = 0; 704 char esc_save[8]; 705 int init_len = strlen(buf); 706 707 if (init_len) 708 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 709 710 while (1) { 711 #ifdef CONFIG_BOOT_RETRY_TIME 712 while (!tstc()) { /* while no incoming data */ 713 if (retry_time >= 0 && get_ticks() > endtime) 714 return (-2); /* timed out */ 715 WATCHDOG_RESET(); 716 } 717 #endif 718 719 ichar = getcmd_getch(); 720 721 if ((ichar == '\n') || (ichar == '\r')) { 722 putc('\n'); 723 break; 724 } 725 726 /* 727 * handle standard linux xterm esc sequences for arrow key, etc. 728 */ 729 if (esc_len != 0) { 730 if (esc_len == 1) { 731 if (ichar == '[') { 732 esc_save[esc_len] = ichar; 733 esc_len = 2; 734 } else { 735 cread_add_str(esc_save, esc_len, insert, 736 &num, &eol_num, buf, *len); 737 esc_len = 0; 738 } 739 continue; 740 } 741 742 switch (ichar) { 743 744 case 'D': /* <- key */ 745 ichar = CTL_CH('b'); 746 esc_len = 0; 747 break; 748 case 'C': /* -> key */ 749 ichar = CTL_CH('f'); 750 esc_len = 0; 751 break; /* pass off to ^F handler */ 752 case 'H': /* Home key */ 753 ichar = CTL_CH('a'); 754 esc_len = 0; 755 break; /* pass off to ^A handler */ 756 case 'A': /* up arrow */ 757 ichar = CTL_CH('p'); 758 esc_len = 0; 759 break; /* pass off to ^P handler */ 760 case 'B': /* down arrow */ 761 ichar = CTL_CH('n'); 762 esc_len = 0; 763 break; /* pass off to ^N handler */ 764 default: 765 esc_save[esc_len++] = ichar; 766 cread_add_str(esc_save, esc_len, insert, 767 &num, &eol_num, buf, *len); 768 esc_len = 0; 769 continue; 770 } 771 } 772 773 switch (ichar) { 774 case 0x1b: 775 if (esc_len == 0) { 776 esc_save[esc_len] = ichar; 777 esc_len = 1; 778 } else { 779 puts("impossible condition #876\n"); 780 esc_len = 0; 781 } 782 break; 783 784 case CTL_CH('a'): 785 BEGINNING_OF_LINE(); 786 break; 787 case CTL_CH('c'): /* ^C - break */ 788 *buf = '\0'; /* discard input */ 789 return (-1); 790 case CTL_CH('f'): 791 if (num < eol_num) { 792 getcmd_putch(buf[num]); 793 num++; 794 } 795 break; 796 case CTL_CH('b'): 797 if (num) { 798 getcmd_putch(CTL_BACKSPACE); 799 num--; 800 } 801 break; 802 case CTL_CH('d'): 803 if (num < eol_num) { 804 wlen = eol_num - num - 1; 805 if (wlen) { 806 memmove(&buf[num], &buf[num+1], wlen); 807 putnstr(buf + num, wlen); 808 } 809 810 getcmd_putch(' '); 811 do { 812 getcmd_putch(CTL_BACKSPACE); 813 } while (wlen--); 814 eol_num--; 815 } 816 break; 817 case CTL_CH('k'): 818 ERASE_TO_EOL(); 819 break; 820 case CTL_CH('e'): 821 REFRESH_TO_EOL(); 822 break; 823 case CTL_CH('o'): 824 insert = !insert; 825 break; 826 case CTL_CH('x'): 827 case CTL_CH('u'): 828 BEGINNING_OF_LINE(); 829 ERASE_TO_EOL(); 830 break; 831 case DEL: 832 case DEL7: 833 case 8: 834 if (num) { 835 wlen = eol_num - num; 836 num--; 837 memmove(&buf[num], &buf[num+1], wlen); 838 getcmd_putch(CTL_BACKSPACE); 839 putnstr(buf + num, wlen); 840 getcmd_putch(' '); 841 do { 842 getcmd_putch(CTL_BACKSPACE); 843 } while (wlen--); 844 eol_num--; 845 } 846 break; 847 case CTL_CH('p'): 848 case CTL_CH('n'): 849 { 850 char * hline; 851 852 esc_len = 0; 853 854 if (ichar == CTL_CH('p')) 855 hline = hist_prev(); 856 else 857 hline = hist_next(); 858 859 if (!hline) { 860 getcmd_cbeep(); 861 continue; 862 } 863 864 /* nuke the current line */ 865 /* first, go home */ 866 BEGINNING_OF_LINE(); 867 868 /* erase to end of line */ 869 ERASE_TO_EOL(); 870 871 /* copy new line into place and display */ 872 strcpy(buf, hline); 873 eol_num = strlen(buf); 874 REFRESH_TO_EOL(); 875 continue; 876 } 877 #ifdef CONFIG_AUTO_COMPLETE 878 case '\t': { 879 int num2, col; 880 881 /* do not autocomplete when in the middle */ 882 if (num < eol_num) { 883 getcmd_cbeep(); 884 break; 885 } 886 887 buf[num] = '\0'; 888 col = strlen(prompt) + eol_num; 889 num2 = num; 890 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 891 col = num2 - num; 892 num += col; 893 eol_num += col; 894 } 895 break; 896 } 897 #endif 898 default: 899 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 900 break; 901 } 902 } 903 *len = eol_num; 904 buf[eol_num] = '\0'; /* lose the newline */ 905 906 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 907 cread_add_to_hist(buf); 908 hist_cur = hist_add_idx; 909 910 return 0; 911 } 912 913 #endif /* CONFIG_CMDLINE_EDITING */ 914 915 /****************************************************************************/ 916 917 /* 918 * Prompt for input and read a line. 919 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 920 * time out when time goes past endtime (timebase time in ticks). 921 * Return: number of read characters 922 * -1 if break 923 * -2 if timed out 924 */ 925 int readline (const char *const prompt) 926 { 927 /* 928 * If console_buffer isn't 0-length the user will be prompted to modify 929 * it instead of entering it from scratch as desired. 930 */ 931 console_buffer[0] = '\0'; 932 933 return readline_into_buffer(prompt, console_buffer); 934 } 935 936 937 int readline_into_buffer (const char *const prompt, char * buffer) 938 { 939 char *p = buffer; 940 #ifdef CONFIG_CMDLINE_EDITING 941 unsigned int len = CONFIG_SYS_CBSIZE; 942 int rc; 943 static int initted = 0; 944 945 /* 946 * History uses a global array which is not 947 * writable until after relocation to RAM. 948 * Revert to non-history version if still 949 * running from flash. 950 */ 951 if (gd->flags & GD_FLG_RELOC) { 952 if (!initted) { 953 hist_init(); 954 initted = 1; 955 } 956 957 if (prompt) 958 puts (prompt); 959 960 rc = cread_line(prompt, p, &len); 961 return rc < 0 ? rc : len; 962 963 } else { 964 #endif /* CONFIG_CMDLINE_EDITING */ 965 char * p_buf = p; 966 int n = 0; /* buffer index */ 967 int plen = 0; /* prompt length */ 968 int col; /* output column cnt */ 969 char c; 970 971 /* print prompt */ 972 if (prompt) { 973 plen = strlen (prompt); 974 puts (prompt); 975 } 976 col = plen; 977 978 for (;;) { 979 #ifdef CONFIG_BOOT_RETRY_TIME 980 while (!tstc()) { /* while no incoming data */ 981 if (retry_time >= 0 && get_ticks() > endtime) 982 return (-2); /* timed out */ 983 WATCHDOG_RESET(); 984 } 985 #endif 986 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 987 988 #ifdef CONFIG_SHOW_ACTIVITY 989 while (!tstc()) { 990 extern void show_activity(int arg); 991 show_activity(0); 992 WATCHDOG_RESET(); 993 } 994 #endif 995 c = getc(); 996 997 /* 998 * Special character handling 999 */ 1000 switch (c) { 1001 case '\r': /* Enter */ 1002 case '\n': 1003 *p = '\0'; 1004 puts ("\r\n"); 1005 return (p - p_buf); 1006 1007 case '\0': /* nul */ 1008 continue; 1009 1010 case 0x03: /* ^C - break */ 1011 p_buf[0] = '\0'; /* discard input */ 1012 return (-1); 1013 1014 case 0x15: /* ^U - erase line */ 1015 while (col > plen) { 1016 puts (erase_seq); 1017 --col; 1018 } 1019 p = p_buf; 1020 n = 0; 1021 continue; 1022 1023 case 0x17: /* ^W - erase word */ 1024 p=delete_char(p_buf, p, &col, &n, plen); 1025 while ((n > 0) && (*p != ' ')) { 1026 p=delete_char(p_buf, p, &col, &n, plen); 1027 } 1028 continue; 1029 1030 case 0x08: /* ^H - backspace */ 1031 case 0x7F: /* DEL - backspace */ 1032 p=delete_char(p_buf, p, &col, &n, plen); 1033 continue; 1034 1035 default: 1036 /* 1037 * Must be a normal character then 1038 */ 1039 if (n < CONFIG_SYS_CBSIZE-2) { 1040 if (c == '\t') { /* expand TABs */ 1041 #ifdef CONFIG_AUTO_COMPLETE 1042 /* if auto completion triggered just continue */ 1043 *p = '\0'; 1044 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1045 p = p_buf + n; /* reset */ 1046 continue; 1047 } 1048 #endif 1049 puts (tab_seq+(col&07)); 1050 col += 8 - (col&07); 1051 } else { 1052 ++col; /* echo input */ 1053 putc (c); 1054 } 1055 *p++ = c; 1056 ++n; 1057 } else { /* Buffer full */ 1058 putc ('\a'); 1059 } 1060 } 1061 } 1062 #ifdef CONFIG_CMDLINE_EDITING 1063 } 1064 #endif 1065 } 1066 1067 /****************************************************************************/ 1068 1069 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1070 { 1071 char *s; 1072 1073 if (*np == 0) { 1074 return (p); 1075 } 1076 1077 if (*(--p) == '\t') { /* will retype the whole line */ 1078 while (*colp > plen) { 1079 puts (erase_seq); 1080 (*colp)--; 1081 } 1082 for (s=buffer; s<p; ++s) { 1083 if (*s == '\t') { 1084 puts (tab_seq+((*colp) & 07)); 1085 *colp += 8 - ((*colp) & 07); 1086 } else { 1087 ++(*colp); 1088 putc (*s); 1089 } 1090 } 1091 } else { 1092 puts (erase_seq); 1093 (*colp)--; 1094 } 1095 (*np)--; 1096 return (p); 1097 } 1098 1099 /****************************************************************************/ 1100 1101 int parse_line (char *line, char *argv[]) 1102 { 1103 int nargs = 0; 1104 1105 #ifdef DEBUG_PARSER 1106 printf ("parse_line: \"%s\"\n", line); 1107 #endif 1108 while (nargs < CONFIG_SYS_MAXARGS) { 1109 1110 /* skip any white space */ 1111 while ((*line == ' ') || (*line == '\t')) { 1112 ++line; 1113 } 1114 1115 if (*line == '\0') { /* end of line, no more args */ 1116 argv[nargs] = NULL; 1117 #ifdef DEBUG_PARSER 1118 printf ("parse_line: nargs=%d\n", nargs); 1119 #endif 1120 return (nargs); 1121 } 1122 1123 argv[nargs++] = line; /* begin of argument string */ 1124 1125 /* find end of string */ 1126 while (*line && (*line != ' ') && (*line != '\t')) { 1127 ++line; 1128 } 1129 1130 if (*line == '\0') { /* end of line, no more args */ 1131 argv[nargs] = NULL; 1132 #ifdef DEBUG_PARSER 1133 printf ("parse_line: nargs=%d\n", nargs); 1134 #endif 1135 return (nargs); 1136 } 1137 1138 *line++ = '\0'; /* terminate current arg */ 1139 } 1140 1141 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1142 1143 #ifdef DEBUG_PARSER 1144 printf ("parse_line: nargs=%d\n", nargs); 1145 #endif 1146 return (nargs); 1147 } 1148 1149 /****************************************************************************/ 1150 1151 static void process_macros (const char *input, char *output) 1152 { 1153 char c, prev; 1154 const char *varname_start = NULL; 1155 int inputcnt = strlen (input); 1156 int outputcnt = CONFIG_SYS_CBSIZE; 1157 int state = 0; /* 0 = waiting for '$' */ 1158 1159 /* 1 = waiting for '(' or '{' */ 1160 /* 2 = waiting for ')' or '}' */ 1161 /* 3 = waiting for ''' */ 1162 #ifdef DEBUG_PARSER 1163 char *output_start = output; 1164 1165 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1166 input); 1167 #endif 1168 1169 prev = '\0'; /* previous character */ 1170 1171 while (inputcnt && outputcnt) { 1172 c = *input++; 1173 inputcnt--; 1174 1175 if (state != 3) { 1176 /* remove one level of escape characters */ 1177 if ((c == '\\') && (prev != '\\')) { 1178 if (inputcnt-- == 0) 1179 break; 1180 prev = c; 1181 c = *input++; 1182 } 1183 } 1184 1185 switch (state) { 1186 case 0: /* Waiting for (unescaped) $ */ 1187 if ((c == '\'') && (prev != '\\')) { 1188 state = 3; 1189 break; 1190 } 1191 if ((c == '$') && (prev != '\\')) { 1192 state++; 1193 } else { 1194 *(output++) = c; 1195 outputcnt--; 1196 } 1197 break; 1198 case 1: /* Waiting for ( */ 1199 if (c == '(' || c == '{') { 1200 state++; 1201 varname_start = input; 1202 } else { 1203 state = 0; 1204 *(output++) = '$'; 1205 outputcnt--; 1206 1207 if (outputcnt) { 1208 *(output++) = c; 1209 outputcnt--; 1210 } 1211 } 1212 break; 1213 case 2: /* Waiting for ) */ 1214 if (c == ')' || c == '}') { 1215 int i; 1216 char envname[CONFIG_SYS_CBSIZE], *envval; 1217 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1218 1219 /* Get the varname */ 1220 for (i = 0; i < envcnt; i++) { 1221 envname[i] = varname_start[i]; 1222 } 1223 envname[i] = 0; 1224 1225 /* Get its value */ 1226 envval = getenv (envname); 1227 1228 /* Copy into the line if it exists */ 1229 if (envval != NULL) 1230 while ((*envval) && outputcnt) { 1231 *(output++) = *(envval++); 1232 outputcnt--; 1233 } 1234 /* Look for another '$' */ 1235 state = 0; 1236 } 1237 break; 1238 case 3: /* Waiting for ' */ 1239 if ((c == '\'') && (prev != '\\')) { 1240 state = 0; 1241 } else { 1242 *(output++) = c; 1243 outputcnt--; 1244 } 1245 break; 1246 } 1247 prev = c; 1248 } 1249 1250 if (outputcnt) 1251 *output = 0; 1252 else 1253 *(output - 1) = 0; 1254 1255 #ifdef DEBUG_PARSER 1256 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1257 strlen (output_start), output_start); 1258 #endif 1259 } 1260 1261 /**************************************************************************** 1262 * returns: 1263 * 1 - command executed, repeatable 1264 * 0 - command executed but not repeatable, interrupted commands are 1265 * always considered not repeatable 1266 * -1 - not executed (unrecognized, bootd recursion or too many args) 1267 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1268 * considered unrecognized) 1269 * 1270 * WARNING: 1271 * 1272 * We must create a temporary copy of the command since the command we get 1273 * may be the result from getenv(), which returns a pointer directly to 1274 * the environment data, which may change magicly when the command we run 1275 * creates or modifies environment variables (like "bootp" does). 1276 */ 1277 1278 int run_command (const char *cmd, int flag) 1279 { 1280 cmd_tbl_t *cmdtp; 1281 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1282 char *token; /* start of token in cmdbuf */ 1283 char *sep; /* end of token (separator) in cmdbuf */ 1284 char finaltoken[CONFIG_SYS_CBSIZE]; 1285 char *str = cmdbuf; 1286 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1287 int argc, inquotes; 1288 int repeatable = 1; 1289 int rc = 0; 1290 1291 #ifdef DEBUG_PARSER 1292 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1293 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1294 puts ("\"\n"); 1295 #endif 1296 1297 clear_ctrlc(); /* forget any previous Control C */ 1298 1299 if (!cmd || !*cmd) { 1300 return -1; /* empty command */ 1301 } 1302 1303 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1304 puts ("## Command too long!\n"); 1305 return -1; 1306 } 1307 1308 strcpy (cmdbuf, cmd); 1309 1310 /* Process separators and check for invalid 1311 * repeatable commands 1312 */ 1313 1314 #ifdef DEBUG_PARSER 1315 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1316 #endif 1317 while (*str) { 1318 1319 /* 1320 * Find separator, or string end 1321 * Allow simple escape of ';' by writing "\;" 1322 */ 1323 for (inquotes = 0, sep = str; *sep; sep++) { 1324 if ((*sep=='\'') && 1325 (*(sep-1) != '\\')) 1326 inquotes=!inquotes; 1327 1328 if (!inquotes && 1329 (*sep == ';') && /* separator */ 1330 ( sep != str) && /* past string start */ 1331 (*(sep-1) != '\\')) /* and NOT escaped */ 1332 break; 1333 } 1334 1335 /* 1336 * Limit the token to data between separators 1337 */ 1338 token = str; 1339 if (*sep) { 1340 str = sep + 1; /* start of command for next pass */ 1341 *sep = '\0'; 1342 } 1343 else 1344 str = sep; /* no more commands for next pass */ 1345 #ifdef DEBUG_PARSER 1346 printf ("token: \"%s\"\n", token); 1347 #endif 1348 1349 /* find macros in this token and replace them */ 1350 process_macros (token, finaltoken); 1351 1352 /* Extract arguments */ 1353 if ((argc = parse_line (finaltoken, argv)) == 0) { 1354 rc = -1; /* no command at all */ 1355 continue; 1356 } 1357 1358 /* Look up command in command table */ 1359 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1360 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1361 rc = -1; /* give up after bad command */ 1362 continue; 1363 } 1364 1365 /* found - check max args */ 1366 if (argc > cmdtp->maxargs) { 1367 cmd_usage(cmdtp); 1368 rc = -1; 1369 continue; 1370 } 1371 1372 #if defined(CONFIG_CMD_BOOTD) 1373 /* avoid "bootd" recursion */ 1374 if (cmdtp->cmd == do_bootd) { 1375 #ifdef DEBUG_PARSER 1376 printf ("[%s]\n", finaltoken); 1377 #endif 1378 if (flag & CMD_FLAG_BOOTD) { 1379 puts ("'bootd' recursion detected\n"); 1380 rc = -1; 1381 continue; 1382 } else { 1383 flag |= CMD_FLAG_BOOTD; 1384 } 1385 } 1386 #endif 1387 1388 /* OK - call function to do the command */ 1389 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1390 rc = -1; 1391 } 1392 1393 repeatable &= cmdtp->repeatable; 1394 1395 /* Did the user stop this? */ 1396 if (had_ctrlc ()) 1397 return -1; /* if stopped then not repeatable */ 1398 } 1399 1400 return rc ? rc : repeatable; 1401 } 1402 1403 /****************************************************************************/ 1404 1405 #if defined(CONFIG_CMD_RUN) 1406 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1407 { 1408 int i; 1409 1410 if (argc < 2) 1411 return cmd_usage(cmdtp); 1412 1413 for (i=1; i<argc; ++i) { 1414 char *arg; 1415 1416 if ((arg = getenv (argv[i])) == NULL) { 1417 printf ("## Error: \"%s\" not defined\n", argv[i]); 1418 return 1; 1419 } 1420 #ifndef CONFIG_SYS_HUSH_PARSER 1421 if (run_command (arg, flag) == -1) 1422 return 1; 1423 #else 1424 if (parse_string_outer(arg, 1425 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1426 return 1; 1427 #endif 1428 } 1429 return 0; 1430 } 1431 #endif 1432