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 #include <version.h> 34 #ifdef CONFIG_MODEM_SUPPORT 35 #include <malloc.h> /* for free() prototype */ 36 #endif 37 38 #ifdef CONFIG_SYS_HUSH_PARSER 39 #include <hush.h> 40 #endif 41 42 #include <post.h> 43 #include <linux/ctype.h> 44 45 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING) 46 DECLARE_GLOBAL_DATA_PTR; 47 #endif 48 49 /* 50 * Board-specific Platform code can reimplement show_boot_progress () if needed 51 */ 52 void inline __show_boot_progress (int val) {} 53 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress"))); 54 55 #if defined(CONFIG_UPDATE_TFTP) 56 int update_tftp (ulong addr); 57 #endif /* CONFIG_UPDATE_TFTP */ 58 59 #define MAX_DELAY_STOP_STR 32 60 61 #undef DEBUG_PARSER 62 63 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ 64 65 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 66 static const char erase_seq[] = "\b \b"; /* erase sequence */ 67 static const char tab_seq[] = " "; /* used to expand TABs */ 68 69 #ifdef CONFIG_BOOT_RETRY_TIME 70 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 71 static int retry_time = -1; /* -1 so can call readline before main_loop */ 72 #endif 73 74 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 75 76 #ifndef CONFIG_BOOT_RETRY_MIN 77 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 78 #endif 79 80 #ifdef CONFIG_MODEM_SUPPORT 81 int do_mdm_init = 0; 82 extern void mdm_init(void); /* defined in board.c */ 83 #endif 84 85 /*************************************************************************** 86 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 87 * returns: 0 - no key string, allow autoboot 1 - got key string, abort 88 */ 89 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 90 # if defined(CONFIG_AUTOBOOT_KEYED) 91 #ifndef CONFIG_MENU 92 static inline 93 #endif 94 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 #ifndef CONFIG_MENU 209 static inline 210 #endif 211 int abortboot(int bootdelay) 212 { 213 int abort = 0; 214 215 #ifdef CONFIG_MENUPROMPT 216 printf(CONFIG_MENUPROMPT); 217 #else 218 printf("Hit any key to stop autoboot: %2d ", bootdelay); 219 #endif 220 221 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 222 /* 223 * Check if key already pressed 224 * Don't check if bootdelay < 0 225 */ 226 if (bootdelay >= 0) { 227 if (tstc()) { /* we got a key press */ 228 (void) getc(); /* consume input */ 229 puts ("\b\b\b 0"); 230 abort = 1; /* don't auto boot */ 231 } 232 } 233 #endif 234 235 while ((bootdelay > 0) && (!abort)) { 236 int i; 237 238 --bootdelay; 239 /* delay 100 * 10ms */ 240 for (i=0; !abort && i<100; ++i) { 241 if (tstc()) { /* we got a key press */ 242 abort = 1; /* don't auto boot */ 243 bootdelay = 0; /* no more delay */ 244 # ifdef CONFIG_MENUKEY 245 menukey = getc(); 246 # else 247 (void) getc(); /* consume input */ 248 # endif 249 break; 250 } 251 udelay(10000); 252 } 253 254 printf("\b\b\b%2d ", bootdelay); 255 } 256 257 putc('\n'); 258 259 #ifdef CONFIG_SILENT_CONSOLE 260 if (abort) 261 gd->flags &= ~GD_FLG_SILENT; 262 #endif 263 264 return abort; 265 } 266 # endif /* CONFIG_AUTOBOOT_KEYED */ 267 #endif /* CONFIG_BOOTDELAY >= 0 */ 268 269 /* 270 * Return 0 on success, or != 0 on error. 271 */ 272 #ifndef CONFIG_CMD_PXE 273 static inline 274 #endif 275 int run_command2(const char *cmd, int flag) 276 { 277 #ifndef CONFIG_SYS_HUSH_PARSER 278 /* 279 * run_command can return 0 or 1 for success, so clean up its result. 280 */ 281 if (run_command(cmd, flag) == -1) 282 return 1; 283 284 return 0; 285 #else 286 return parse_string_outer(cmd, 287 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP); 288 #endif 289 } 290 291 /****************************************************************************/ 292 293 void main_loop (void) 294 { 295 #ifndef CONFIG_SYS_HUSH_PARSER 296 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, }; 297 int len; 298 int rc = 1; 299 int flag; 300 #endif 301 302 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 303 char *s; 304 int bootdelay; 305 #endif 306 #ifdef CONFIG_PREBOOT 307 char *p; 308 #endif 309 #ifdef CONFIG_BOOTCOUNT_LIMIT 310 unsigned long bootcount = 0; 311 unsigned long bootlimit = 0; 312 char *bcs; 313 char bcs_set[16]; 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 315 316 #ifdef CONFIG_BOOTCOUNT_LIMIT 317 bootcount = bootcount_load(); 318 bootcount++; 319 bootcount_store (bootcount); 320 sprintf (bcs_set, "%lu", bootcount); 321 setenv ("bootcount", bcs_set); 322 bcs = getenv ("bootlimit"); 323 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 324 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 325 326 #ifdef CONFIG_MODEM_SUPPORT 327 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 328 if (do_mdm_init) { 329 char *str = strdup(getenv("mdm_cmd")); 330 setenv ("preboot", str); /* set or delete definition */ 331 if (str != NULL) 332 free (str); 333 mdm_init(); /* wait for modem connection */ 334 } 335 #endif /* CONFIG_MODEM_SUPPORT */ 336 337 #ifdef CONFIG_VERSION_VARIABLE 338 { 339 setenv ("ver", version_string); /* set version variable */ 340 } 341 #endif /* CONFIG_VERSION_VARIABLE */ 342 343 #ifdef CONFIG_SYS_HUSH_PARSER 344 u_boot_hush_start (); 345 #endif 346 347 #if defined(CONFIG_HUSH_INIT_VAR) 348 hush_init_var (); 349 #endif 350 351 #ifdef CONFIG_PREBOOT 352 if ((p = getenv ("preboot")) != NULL) { 353 # ifdef CONFIG_AUTOBOOT_KEYED 354 int prev = disable_ctrlc(1); /* disable Control C checking */ 355 # endif 356 357 run_command2(p, 0); 358 359 # ifdef CONFIG_AUTOBOOT_KEYED 360 disable_ctrlc(prev); /* restore Control C checking */ 361 # endif 362 } 363 #endif /* CONFIG_PREBOOT */ 364 365 #if defined(CONFIG_UPDATE_TFTP) 366 update_tftp (0UL); 367 #endif /* CONFIG_UPDATE_TFTP */ 368 369 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 370 s = getenv ("bootdelay"); 371 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 372 373 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 374 375 # ifdef CONFIG_BOOT_RETRY_TIME 376 init_cmd_timeout (); 377 # endif /* CONFIG_BOOT_RETRY_TIME */ 378 379 #ifdef CONFIG_POST 380 if (gd->flags & GD_FLG_POSTFAIL) { 381 s = getenv("failbootcmd"); 382 } 383 else 384 #endif /* CONFIG_POST */ 385 #ifdef CONFIG_BOOTCOUNT_LIMIT 386 if (bootlimit && (bootcount > bootlimit)) { 387 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 388 (unsigned)bootlimit); 389 s = getenv ("altbootcmd"); 390 } 391 else 392 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 393 s = getenv ("bootcmd"); 394 395 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 396 397 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 398 # ifdef CONFIG_AUTOBOOT_KEYED 399 int prev = disable_ctrlc(1); /* disable Control C checking */ 400 # endif 401 402 run_command2(s, 0); 403 404 # ifdef CONFIG_AUTOBOOT_KEYED 405 disable_ctrlc(prev); /* restore Control C checking */ 406 # endif 407 } 408 409 # ifdef CONFIG_MENUKEY 410 if (menukey == CONFIG_MENUKEY) { 411 s = getenv("menucmd"); 412 if (s) 413 run_command2(s, 0); 414 } 415 #endif /* CONFIG_MENUKEY */ 416 #endif /* CONFIG_BOOTDELAY */ 417 418 /* 419 * Main Loop for Monitor Command Processing 420 */ 421 #ifdef CONFIG_SYS_HUSH_PARSER 422 parse_file_outer(); 423 /* This point is never reached */ 424 for (;;); 425 #else 426 for (;;) { 427 #ifdef CONFIG_BOOT_RETRY_TIME 428 if (rc >= 0) { 429 /* Saw enough of a valid command to 430 * restart the timeout. 431 */ 432 reset_cmd_timeout(); 433 } 434 #endif 435 len = readline (CONFIG_SYS_PROMPT); 436 437 flag = 0; /* assume no special flags for now */ 438 if (len > 0) 439 strcpy (lastcommand, console_buffer); 440 else if (len == 0) 441 flag |= CMD_FLAG_REPEAT; 442 #ifdef CONFIG_BOOT_RETRY_TIME 443 else if (len == -2) { 444 /* -2 means timed out, retry autoboot 445 */ 446 puts ("\nTimed out waiting for command\n"); 447 # ifdef CONFIG_RESET_TO_RETRY 448 /* Reinit board to run initialization code again */ 449 do_reset (NULL, 0, 0, NULL); 450 # else 451 return; /* retry autoboot */ 452 # endif 453 } 454 #endif 455 456 if (len == -1) 457 puts ("<INTERRUPT>\n"); 458 else 459 rc = run_command (lastcommand, flag); 460 461 if (rc <= 0) { 462 /* invalid command or not repeatable, forget it */ 463 lastcommand[0] = 0; 464 } 465 } 466 #endif /*CONFIG_SYS_HUSH_PARSER*/ 467 } 468 469 #ifdef CONFIG_BOOT_RETRY_TIME 470 /*************************************************************************** 471 * initialize command line timeout 472 */ 473 void init_cmd_timeout(void) 474 { 475 char *s = getenv ("bootretry"); 476 477 if (s != NULL) 478 retry_time = (int)simple_strtol(s, NULL, 10); 479 else 480 retry_time = CONFIG_BOOT_RETRY_TIME; 481 482 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 483 retry_time = CONFIG_BOOT_RETRY_MIN; 484 } 485 486 /*************************************************************************** 487 * reset command line timeout to retry_time seconds 488 */ 489 void reset_cmd_timeout(void) 490 { 491 endtime = endtick(retry_time); 492 } 493 #endif 494 495 #ifdef CONFIG_CMDLINE_EDITING 496 497 /* 498 * cmdline-editing related codes from vivi. 499 * Author: Janghoon Lyu <nandy@mizi.com> 500 */ 501 502 #define putnstr(str,n) do { \ 503 printf ("%.*s", (int)n, str); \ 504 } while (0) 505 506 #define CTL_CH(c) ((c) - 'a' + 1) 507 #define CTL_BACKSPACE ('\b') 508 #define DEL ((char)255) 509 #define DEL7 ((char)127) 510 #define CREAD_HIST_CHAR ('!') 511 512 #define getcmd_putch(ch) putc(ch) 513 #define getcmd_getch() getc() 514 #define getcmd_cbeep() getcmd_putch('\a') 515 516 #define HIST_MAX 20 517 #define HIST_SIZE CONFIG_SYS_CBSIZE 518 519 static int hist_max = 0; 520 static int hist_add_idx = 0; 521 static int hist_cur = -1; 522 unsigned hist_num = 0; 523 524 char* hist_list[HIST_MAX]; 525 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ 526 527 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 528 529 static void hist_init(void) 530 { 531 int i; 532 533 hist_max = 0; 534 hist_add_idx = 0; 535 hist_cur = -1; 536 hist_num = 0; 537 538 for (i = 0; i < HIST_MAX; i++) { 539 hist_list[i] = hist_lines[i]; 540 hist_list[i][0] = '\0'; 541 } 542 } 543 544 static void cread_add_to_hist(char *line) 545 { 546 strcpy(hist_list[hist_add_idx], line); 547 548 if (++hist_add_idx >= HIST_MAX) 549 hist_add_idx = 0; 550 551 if (hist_add_idx > hist_max) 552 hist_max = hist_add_idx; 553 554 hist_num++; 555 } 556 557 static char* hist_prev(void) 558 { 559 char *ret; 560 int old_cur; 561 562 if (hist_cur < 0) 563 return NULL; 564 565 old_cur = hist_cur; 566 if (--hist_cur < 0) 567 hist_cur = hist_max; 568 569 if (hist_cur == hist_add_idx) { 570 hist_cur = old_cur; 571 ret = NULL; 572 } else 573 ret = hist_list[hist_cur]; 574 575 return (ret); 576 } 577 578 static char* hist_next(void) 579 { 580 char *ret; 581 582 if (hist_cur < 0) 583 return NULL; 584 585 if (hist_cur == hist_add_idx) 586 return NULL; 587 588 if (++hist_cur > hist_max) 589 hist_cur = 0; 590 591 if (hist_cur == hist_add_idx) { 592 ret = ""; 593 } else 594 ret = hist_list[hist_cur]; 595 596 return (ret); 597 } 598 599 #ifndef CONFIG_CMDLINE_EDITING 600 static void cread_print_hist_list(void) 601 { 602 int i; 603 unsigned long n; 604 605 n = hist_num - hist_max; 606 607 i = hist_add_idx + 1; 608 while (1) { 609 if (i > hist_max) 610 i = 0; 611 if (i == hist_add_idx) 612 break; 613 printf("%s\n", hist_list[i]); 614 n++; 615 i++; 616 } 617 } 618 #endif /* CONFIG_CMDLINE_EDITING */ 619 620 #define BEGINNING_OF_LINE() { \ 621 while (num) { \ 622 getcmd_putch(CTL_BACKSPACE); \ 623 num--; \ 624 } \ 625 } 626 627 #define ERASE_TO_EOL() { \ 628 if (num < eol_num) { \ 629 printf("%*s", (int)(eol_num - num), ""); \ 630 do { \ 631 getcmd_putch(CTL_BACKSPACE); \ 632 } while (--eol_num > num); \ 633 } \ 634 } 635 636 #define REFRESH_TO_EOL() { \ 637 if (num < eol_num) { \ 638 wlen = eol_num - num; \ 639 putnstr(buf + num, wlen); \ 640 num = eol_num; \ 641 } \ 642 } 643 644 static void cread_add_char(char ichar, int insert, unsigned long *num, 645 unsigned long *eol_num, char *buf, unsigned long len) 646 { 647 unsigned long wlen; 648 649 /* room ??? */ 650 if (insert || *num == *eol_num) { 651 if (*eol_num > len - 1) { 652 getcmd_cbeep(); 653 return; 654 } 655 (*eol_num)++; 656 } 657 658 if (insert) { 659 wlen = *eol_num - *num; 660 if (wlen > 1) { 661 memmove(&buf[*num+1], &buf[*num], wlen-1); 662 } 663 664 buf[*num] = ichar; 665 putnstr(buf + *num, wlen); 666 (*num)++; 667 while (--wlen) { 668 getcmd_putch(CTL_BACKSPACE); 669 } 670 } else { 671 /* echo the character */ 672 wlen = 1; 673 buf[*num] = ichar; 674 putnstr(buf + *num, wlen); 675 (*num)++; 676 } 677 } 678 679 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 680 unsigned long *eol_num, char *buf, unsigned long len) 681 { 682 while (strsize--) { 683 cread_add_char(*str, insert, num, eol_num, buf, len); 684 str++; 685 } 686 } 687 688 static int cread_line(const char *const prompt, char *buf, unsigned int *len, 689 int timeout) 690 { 691 unsigned long num = 0; 692 unsigned long eol_num = 0; 693 unsigned long wlen; 694 char ichar; 695 int insert = 1; 696 int esc_len = 0; 697 char esc_save[8]; 698 int init_len = strlen(buf); 699 int first = 1; 700 701 if (init_len) 702 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 703 704 while (1) { 705 #ifdef CONFIG_BOOT_RETRY_TIME 706 while (!tstc()) { /* while no incoming data */ 707 if (retry_time >= 0 && get_ticks() > endtime) 708 return (-2); /* timed out */ 709 WATCHDOG_RESET(); 710 } 711 #endif 712 if (first && timeout) { 713 uint64_t etime = endtick(timeout); 714 715 while (!tstc()) { /* while no incoming data */ 716 if (get_ticks() >= etime) 717 return -2; /* timed out */ 718 WATCHDOG_RESET(); 719 } 720 first = 0; 721 } 722 723 ichar = getcmd_getch(); 724 725 if ((ichar == '\n') || (ichar == '\r')) { 726 putc('\n'); 727 break; 728 } 729 730 /* 731 * handle standard linux xterm esc sequences for arrow key, etc. 732 */ 733 if (esc_len != 0) { 734 if (esc_len == 1) { 735 if (ichar == '[') { 736 esc_save[esc_len] = ichar; 737 esc_len = 2; 738 } else { 739 cread_add_str(esc_save, esc_len, insert, 740 &num, &eol_num, buf, *len); 741 esc_len = 0; 742 } 743 continue; 744 } 745 746 switch (ichar) { 747 748 case 'D': /* <- key */ 749 ichar = CTL_CH('b'); 750 esc_len = 0; 751 break; 752 case 'C': /* -> key */ 753 ichar = CTL_CH('f'); 754 esc_len = 0; 755 break; /* pass off to ^F handler */ 756 case 'H': /* Home key */ 757 ichar = CTL_CH('a'); 758 esc_len = 0; 759 break; /* pass off to ^A handler */ 760 case 'A': /* up arrow */ 761 ichar = CTL_CH('p'); 762 esc_len = 0; 763 break; /* pass off to ^P handler */ 764 case 'B': /* down arrow */ 765 ichar = CTL_CH('n'); 766 esc_len = 0; 767 break; /* pass off to ^N handler */ 768 default: 769 esc_save[esc_len++] = ichar; 770 cread_add_str(esc_save, esc_len, insert, 771 &num, &eol_num, buf, *len); 772 esc_len = 0; 773 continue; 774 } 775 } 776 777 switch (ichar) { 778 case 0x1b: 779 if (esc_len == 0) { 780 esc_save[esc_len] = ichar; 781 esc_len = 1; 782 } else { 783 puts("impossible condition #876\n"); 784 esc_len = 0; 785 } 786 break; 787 788 case CTL_CH('a'): 789 BEGINNING_OF_LINE(); 790 break; 791 case CTL_CH('c'): /* ^C - break */ 792 *buf = '\0'; /* discard input */ 793 return (-1); 794 case CTL_CH('f'): 795 if (num < eol_num) { 796 getcmd_putch(buf[num]); 797 num++; 798 } 799 break; 800 case CTL_CH('b'): 801 if (num) { 802 getcmd_putch(CTL_BACKSPACE); 803 num--; 804 } 805 break; 806 case CTL_CH('d'): 807 if (num < eol_num) { 808 wlen = eol_num - num - 1; 809 if (wlen) { 810 memmove(&buf[num], &buf[num+1], wlen); 811 putnstr(buf + num, wlen); 812 } 813 814 getcmd_putch(' '); 815 do { 816 getcmd_putch(CTL_BACKSPACE); 817 } while (wlen--); 818 eol_num--; 819 } 820 break; 821 case CTL_CH('k'): 822 ERASE_TO_EOL(); 823 break; 824 case CTL_CH('e'): 825 REFRESH_TO_EOL(); 826 break; 827 case CTL_CH('o'): 828 insert = !insert; 829 break; 830 case CTL_CH('x'): 831 case CTL_CH('u'): 832 BEGINNING_OF_LINE(); 833 ERASE_TO_EOL(); 834 break; 835 case DEL: 836 case DEL7: 837 case 8: 838 if (num) { 839 wlen = eol_num - num; 840 num--; 841 memmove(&buf[num], &buf[num+1], wlen); 842 getcmd_putch(CTL_BACKSPACE); 843 putnstr(buf + num, wlen); 844 getcmd_putch(' '); 845 do { 846 getcmd_putch(CTL_BACKSPACE); 847 } while (wlen--); 848 eol_num--; 849 } 850 break; 851 case CTL_CH('p'): 852 case CTL_CH('n'): 853 { 854 char * hline; 855 856 esc_len = 0; 857 858 if (ichar == CTL_CH('p')) 859 hline = hist_prev(); 860 else 861 hline = hist_next(); 862 863 if (!hline) { 864 getcmd_cbeep(); 865 continue; 866 } 867 868 /* nuke the current line */ 869 /* first, go home */ 870 BEGINNING_OF_LINE(); 871 872 /* erase to end of line */ 873 ERASE_TO_EOL(); 874 875 /* copy new line into place and display */ 876 strcpy(buf, hline); 877 eol_num = strlen(buf); 878 REFRESH_TO_EOL(); 879 continue; 880 } 881 #ifdef CONFIG_AUTO_COMPLETE 882 case '\t': { 883 int num2, col; 884 885 /* do not autocomplete when in the middle */ 886 if (num < eol_num) { 887 getcmd_cbeep(); 888 break; 889 } 890 891 buf[num] = '\0'; 892 col = strlen(prompt) + eol_num; 893 num2 = num; 894 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 895 col = num2 - num; 896 num += col; 897 eol_num += col; 898 } 899 break; 900 } 901 #endif 902 default: 903 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 904 break; 905 } 906 } 907 *len = eol_num; 908 buf[eol_num] = '\0'; /* lose the newline */ 909 910 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 911 cread_add_to_hist(buf); 912 hist_cur = hist_add_idx; 913 914 return 0; 915 } 916 917 #endif /* CONFIG_CMDLINE_EDITING */ 918 919 /****************************************************************************/ 920 921 /* 922 * Prompt for input and read a line. 923 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 924 * time out when time goes past endtime (timebase time in ticks). 925 * Return: number of read characters 926 * -1 if break 927 * -2 if timed out 928 */ 929 int readline (const char *const prompt) 930 { 931 /* 932 * If console_buffer isn't 0-length the user will be prompted to modify 933 * it instead of entering it from scratch as desired. 934 */ 935 console_buffer[0] = '\0'; 936 937 return readline_into_buffer(prompt, console_buffer, 0); 938 } 939 940 941 int readline_into_buffer(const char *const prompt, char *buffer, int timeout) 942 { 943 char *p = buffer; 944 #ifdef CONFIG_CMDLINE_EDITING 945 unsigned int len = CONFIG_SYS_CBSIZE; 946 int rc; 947 static int initted = 0; 948 949 /* 950 * History uses a global array which is not 951 * writable until after relocation to RAM. 952 * Revert to non-history version if still 953 * running from flash. 954 */ 955 if (gd->flags & GD_FLG_RELOC) { 956 if (!initted) { 957 hist_init(); 958 initted = 1; 959 } 960 961 if (prompt) 962 puts (prompt); 963 964 rc = cread_line(prompt, p, &len, timeout); 965 return rc < 0 ? rc : len; 966 967 } else { 968 #endif /* CONFIG_CMDLINE_EDITING */ 969 char * p_buf = p; 970 int n = 0; /* buffer index */ 971 int plen = 0; /* prompt length */ 972 int col; /* output column cnt */ 973 char c; 974 975 /* print prompt */ 976 if (prompt) { 977 plen = strlen (prompt); 978 puts (prompt); 979 } 980 col = plen; 981 982 for (;;) { 983 #ifdef CONFIG_BOOT_RETRY_TIME 984 while (!tstc()) { /* while no incoming data */ 985 if (retry_time >= 0 && get_ticks() > endtime) 986 return (-2); /* timed out */ 987 WATCHDOG_RESET(); 988 } 989 #endif 990 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 991 992 #ifdef CONFIG_SHOW_ACTIVITY 993 while (!tstc()) { 994 extern void show_activity(int arg); 995 show_activity(0); 996 WATCHDOG_RESET(); 997 } 998 #endif 999 c = getc(); 1000 1001 /* 1002 * Special character handling 1003 */ 1004 switch (c) { 1005 case '\r': /* Enter */ 1006 case '\n': 1007 *p = '\0'; 1008 puts ("\r\n"); 1009 return (p - p_buf); 1010 1011 case '\0': /* nul */ 1012 continue; 1013 1014 case 0x03: /* ^C - break */ 1015 p_buf[0] = '\0'; /* discard input */ 1016 return (-1); 1017 1018 case 0x15: /* ^U - erase line */ 1019 while (col > plen) { 1020 puts (erase_seq); 1021 --col; 1022 } 1023 p = p_buf; 1024 n = 0; 1025 continue; 1026 1027 case 0x17: /* ^W - erase word */ 1028 p=delete_char(p_buf, p, &col, &n, plen); 1029 while ((n > 0) && (*p != ' ')) { 1030 p=delete_char(p_buf, p, &col, &n, plen); 1031 } 1032 continue; 1033 1034 case 0x08: /* ^H - backspace */ 1035 case 0x7F: /* DEL - backspace */ 1036 p=delete_char(p_buf, p, &col, &n, plen); 1037 continue; 1038 1039 default: 1040 /* 1041 * Must be a normal character then 1042 */ 1043 if (n < CONFIG_SYS_CBSIZE-2) { 1044 if (c == '\t') { /* expand TABs */ 1045 #ifdef CONFIG_AUTO_COMPLETE 1046 /* if auto completion triggered just continue */ 1047 *p = '\0'; 1048 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1049 p = p_buf + n; /* reset */ 1050 continue; 1051 } 1052 #endif 1053 puts (tab_seq+(col&07)); 1054 col += 8 - (col&07); 1055 } else { 1056 ++col; /* echo input */ 1057 putc (c); 1058 } 1059 *p++ = c; 1060 ++n; 1061 } else { /* Buffer full */ 1062 putc ('\a'); 1063 } 1064 } 1065 } 1066 #ifdef CONFIG_CMDLINE_EDITING 1067 } 1068 #endif 1069 } 1070 1071 /****************************************************************************/ 1072 1073 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1074 { 1075 char *s; 1076 1077 if (*np == 0) { 1078 return (p); 1079 } 1080 1081 if (*(--p) == '\t') { /* will retype the whole line */ 1082 while (*colp > plen) { 1083 puts (erase_seq); 1084 (*colp)--; 1085 } 1086 for (s=buffer; s<p; ++s) { 1087 if (*s == '\t') { 1088 puts (tab_seq+((*colp) & 07)); 1089 *colp += 8 - ((*colp) & 07); 1090 } else { 1091 ++(*colp); 1092 putc (*s); 1093 } 1094 } 1095 } else { 1096 puts (erase_seq); 1097 (*colp)--; 1098 } 1099 (*np)--; 1100 return (p); 1101 } 1102 1103 /****************************************************************************/ 1104 1105 int parse_line (char *line, char *argv[]) 1106 { 1107 int nargs = 0; 1108 1109 #ifdef DEBUG_PARSER 1110 printf ("parse_line: \"%s\"\n", line); 1111 #endif 1112 while (nargs < CONFIG_SYS_MAXARGS) { 1113 1114 /* skip any white space */ 1115 while (isblank(*line)) 1116 ++line; 1117 1118 if (*line == '\0') { /* end of line, no more args */ 1119 argv[nargs] = NULL; 1120 #ifdef DEBUG_PARSER 1121 printf ("parse_line: nargs=%d\n", nargs); 1122 #endif 1123 return (nargs); 1124 } 1125 1126 argv[nargs++] = line; /* begin of argument string */ 1127 1128 /* find end of string */ 1129 while (*line && !isblank(*line)) 1130 ++line; 1131 1132 if (*line == '\0') { /* end of line, no more args */ 1133 argv[nargs] = NULL; 1134 #ifdef DEBUG_PARSER 1135 printf ("parse_line: nargs=%d\n", nargs); 1136 #endif 1137 return (nargs); 1138 } 1139 1140 *line++ = '\0'; /* terminate current arg */ 1141 } 1142 1143 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1144 1145 #ifdef DEBUG_PARSER 1146 printf ("parse_line: nargs=%d\n", nargs); 1147 #endif 1148 return (nargs); 1149 } 1150 1151 /****************************************************************************/ 1152 1153 static void process_macros (const char *input, char *output) 1154 { 1155 char c, prev; 1156 const char *varname_start = NULL; 1157 int inputcnt = strlen (input); 1158 int outputcnt = CONFIG_SYS_CBSIZE; 1159 int state = 0; /* 0 = waiting for '$' */ 1160 1161 /* 1 = waiting for '(' or '{' */ 1162 /* 2 = waiting for ')' or '}' */ 1163 /* 3 = waiting for ''' */ 1164 #ifdef DEBUG_PARSER 1165 char *output_start = output; 1166 1167 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1168 input); 1169 #endif 1170 1171 prev = '\0'; /* previous character */ 1172 1173 while (inputcnt && outputcnt) { 1174 c = *input++; 1175 inputcnt--; 1176 1177 if (state != 3) { 1178 /* remove one level of escape characters */ 1179 if ((c == '\\') && (prev != '\\')) { 1180 if (inputcnt-- == 0) 1181 break; 1182 prev = c; 1183 c = *input++; 1184 } 1185 } 1186 1187 switch (state) { 1188 case 0: /* Waiting for (unescaped) $ */ 1189 if ((c == '\'') && (prev != '\\')) { 1190 state = 3; 1191 break; 1192 } 1193 if ((c == '$') && (prev != '\\')) { 1194 state++; 1195 } else { 1196 *(output++) = c; 1197 outputcnt--; 1198 } 1199 break; 1200 case 1: /* Waiting for ( */ 1201 if (c == '(' || c == '{') { 1202 state++; 1203 varname_start = input; 1204 } else { 1205 state = 0; 1206 *(output++) = '$'; 1207 outputcnt--; 1208 1209 if (outputcnt) { 1210 *(output++) = c; 1211 outputcnt--; 1212 } 1213 } 1214 break; 1215 case 2: /* Waiting for ) */ 1216 if (c == ')' || c == '}') { 1217 int i; 1218 char envname[CONFIG_SYS_CBSIZE], *envval; 1219 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1220 1221 /* Get the varname */ 1222 for (i = 0; i < envcnt; i++) { 1223 envname[i] = varname_start[i]; 1224 } 1225 envname[i] = 0; 1226 1227 /* Get its value */ 1228 envval = getenv (envname); 1229 1230 /* Copy into the line if it exists */ 1231 if (envval != NULL) 1232 while ((*envval) && outputcnt) { 1233 *(output++) = *(envval++); 1234 outputcnt--; 1235 } 1236 /* Look for another '$' */ 1237 state = 0; 1238 } 1239 break; 1240 case 3: /* Waiting for ' */ 1241 if ((c == '\'') && (prev != '\\')) { 1242 state = 0; 1243 } else { 1244 *(output++) = c; 1245 outputcnt--; 1246 } 1247 break; 1248 } 1249 prev = c; 1250 } 1251 1252 if (outputcnt) 1253 *output = 0; 1254 else 1255 *(output - 1) = 0; 1256 1257 #ifdef DEBUG_PARSER 1258 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1259 strlen (output_start), output_start); 1260 #endif 1261 } 1262 1263 /**************************************************************************** 1264 * returns: 1265 * 1 - command executed, repeatable 1266 * 0 - command executed but not repeatable, interrupted commands are 1267 * always considered not repeatable 1268 * -1 - not executed (unrecognized, bootd recursion or too many args) 1269 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1270 * considered unrecognized) 1271 * 1272 * WARNING: 1273 * 1274 * We must create a temporary copy of the command since the command we get 1275 * may be the result from getenv(), which returns a pointer directly to 1276 * the environment data, which may change magicly when the command we run 1277 * creates or modifies environment variables (like "bootp" does). 1278 */ 1279 1280 int run_command (const char *cmd, int flag) 1281 { 1282 cmd_tbl_t *cmdtp; 1283 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1284 char *token; /* start of token in cmdbuf */ 1285 char *sep; /* end of token (separator) in cmdbuf */ 1286 char finaltoken[CONFIG_SYS_CBSIZE]; 1287 char *str = cmdbuf; 1288 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1289 int argc, inquotes; 1290 int repeatable = 1; 1291 int rc = 0; 1292 1293 #ifdef DEBUG_PARSER 1294 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1295 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1296 puts ("\"\n"); 1297 #endif 1298 1299 clear_ctrlc(); /* forget any previous Control C */ 1300 1301 if (!cmd || !*cmd) { 1302 return -1; /* empty command */ 1303 } 1304 1305 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1306 puts ("## Command too long!\n"); 1307 return -1; 1308 } 1309 1310 strcpy (cmdbuf, cmd); 1311 1312 /* Process separators and check for invalid 1313 * repeatable commands 1314 */ 1315 1316 #ifdef DEBUG_PARSER 1317 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1318 #endif 1319 while (*str) { 1320 1321 /* 1322 * Find separator, or string end 1323 * Allow simple escape of ';' by writing "\;" 1324 */ 1325 for (inquotes = 0, sep = str; *sep; sep++) { 1326 if ((*sep=='\'') && 1327 (*(sep-1) != '\\')) 1328 inquotes=!inquotes; 1329 1330 if (!inquotes && 1331 (*sep == ';') && /* separator */ 1332 ( sep != str) && /* past string start */ 1333 (*(sep-1) != '\\')) /* and NOT escaped */ 1334 break; 1335 } 1336 1337 /* 1338 * Limit the token to data between separators 1339 */ 1340 token = str; 1341 if (*sep) { 1342 str = sep + 1; /* start of command for next pass */ 1343 *sep = '\0'; 1344 } 1345 else 1346 str = sep; /* no more commands for next pass */ 1347 #ifdef DEBUG_PARSER 1348 printf ("token: \"%s\"\n", token); 1349 #endif 1350 1351 /* find macros in this token and replace them */ 1352 process_macros (token, finaltoken); 1353 1354 /* Extract arguments */ 1355 if ((argc = parse_line (finaltoken, argv)) == 0) { 1356 rc = -1; /* no command at all */ 1357 continue; 1358 } 1359 1360 /* Look up command in command table */ 1361 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1362 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1363 rc = -1; /* give up after bad command */ 1364 continue; 1365 } 1366 1367 /* found - check max args */ 1368 if (argc > cmdtp->maxargs) { 1369 cmd_usage(cmdtp); 1370 rc = -1; 1371 continue; 1372 } 1373 1374 #if defined(CONFIG_CMD_BOOTD) 1375 /* avoid "bootd" recursion */ 1376 if (cmdtp->cmd == do_bootd) { 1377 #ifdef DEBUG_PARSER 1378 printf ("[%s]\n", finaltoken); 1379 #endif 1380 if (flag & CMD_FLAG_BOOTD) { 1381 puts ("'bootd' recursion detected\n"); 1382 rc = -1; 1383 continue; 1384 } else { 1385 flag |= CMD_FLAG_BOOTD; 1386 } 1387 } 1388 #endif 1389 1390 /* OK - call function to do the command */ 1391 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1392 rc = -1; 1393 } 1394 1395 repeatable &= cmdtp->repeatable; 1396 1397 /* Did the user stop this? */ 1398 if (had_ctrlc ()) 1399 return -1; /* if stopped then not repeatable */ 1400 } 1401 1402 return rc ? rc : repeatable; 1403 } 1404 1405 /****************************************************************************/ 1406 1407 #if defined(CONFIG_CMD_RUN) 1408 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1409 { 1410 int i; 1411 1412 if (argc < 2) 1413 return cmd_usage(cmdtp); 1414 1415 for (i=1; i<argc; ++i) { 1416 char *arg; 1417 1418 if ((arg = getenv (argv[i])) == NULL) { 1419 printf ("## Error: \"%s\" not defined\n", argv[i]); 1420 return 1; 1421 } 1422 1423 if (run_command2(arg, flag) != 0) 1424 return 1; 1425 } 1426 return 0; 1427 } 1428 #endif 1429