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_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) 54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); /* for do_reset() prototype */ 55 #endif 56 57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 58 59 #if defined(CONFIG_UPDATE_TFTP) 60 void update_tftp (void); 61 #endif /* CONFIG_UPDATE_TFTP */ 62 63 #define MAX_DELAY_STOP_STR 32 64 65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 66 static int abortboot(int); 67 #endif 68 69 #undef DEBUG_PARSER 70 71 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ 72 73 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 74 static char erase_seq[] = "\b \b"; /* erase sequence */ 75 static char tab_seq[] = " "; /* used to expand TABs */ 76 77 #ifdef CONFIG_BOOT_RETRY_TIME 78 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 79 static int retry_time = -1; /* -1 so can call readline before main_loop */ 80 #endif 81 82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 83 84 #ifndef CONFIG_BOOT_RETRY_MIN 85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 86 #endif 87 88 #ifdef CONFIG_MODEM_SUPPORT 89 int do_mdm_init = 0; 90 extern void mdm_init(void); /* defined in board.c */ 91 #endif 92 93 /*************************************************************************** 94 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 95 * returns: 0 - no key string, allow autoboot 96 * 1 - got key string, abort 97 */ 98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 99 # if defined(CONFIG_AUTOBOOT_KEYED) 100 static __inline__ int abortboot(int bootdelay) 101 { 102 int abort = 0; 103 uint64_t etime = endtick(bootdelay); 104 struct { 105 char* str; 106 u_int len; 107 int retry; 108 } 109 delaykey [] = { 110 { str: getenv ("bootdelaykey"), retry: 1 }, 111 { str: getenv ("bootdelaykey2"), retry: 1 }, 112 { str: getenv ("bootstopkey"), retry: 0 }, 113 { str: getenv ("bootstopkey2"), retry: 0 }, 114 }; 115 116 char presskey [MAX_DELAY_STOP_STR]; 117 u_int presskey_len = 0; 118 u_int presskey_max = 0; 119 u_int i; 120 121 # ifdef CONFIG_AUTOBOOT_PROMPT 122 printf(CONFIG_AUTOBOOT_PROMPT); 123 # endif 124 125 # ifdef CONFIG_AUTOBOOT_DELAY_STR 126 if (delaykey[0].str == NULL) 127 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 128 # endif 129 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 130 if (delaykey[1].str == NULL) 131 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 132 # endif 133 # ifdef CONFIG_AUTOBOOT_STOP_STR 134 if (delaykey[2].str == NULL) 135 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 136 # endif 137 # ifdef CONFIG_AUTOBOOT_STOP_STR2 138 if (delaykey[3].str == NULL) 139 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 140 # endif 141 142 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 143 delaykey[i].len = delaykey[i].str == NULL ? 144 0 : strlen (delaykey[i].str); 145 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 146 MAX_DELAY_STOP_STR : delaykey[i].len; 147 148 presskey_max = presskey_max > delaykey[i].len ? 149 presskey_max : delaykey[i].len; 150 151 # if DEBUG_BOOTKEYS 152 printf("%s key:<%s>\n", 153 delaykey[i].retry ? "delay" : "stop", 154 delaykey[i].str ? delaykey[i].str : "NULL"); 155 # endif 156 } 157 158 /* In order to keep up with incoming data, check timeout only 159 * when catch up. 160 */ 161 do { 162 if (tstc()) { 163 if (presskey_len < presskey_max) { 164 presskey [presskey_len ++] = getc(); 165 } 166 else { 167 for (i = 0; i < presskey_max - 1; i ++) 168 presskey [i] = presskey [i + 1]; 169 170 presskey [i] = getc(); 171 } 172 } 173 174 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 175 if (delaykey[i].len > 0 && 176 presskey_len >= delaykey[i].len && 177 memcmp (presskey + presskey_len - delaykey[i].len, 178 delaykey[i].str, 179 delaykey[i].len) == 0) { 180 # if DEBUG_BOOTKEYS 181 printf("got %skey\n", 182 delaykey[i].retry ? "delay" : "stop"); 183 # endif 184 185 # ifdef CONFIG_BOOT_RETRY_TIME 186 /* don't retry auto boot */ 187 if (! delaykey[i].retry) 188 retry_time = -1; 189 # endif 190 abort = 1; 191 } 192 } 193 } while (!abort && get_ticks() <= etime); 194 195 # if DEBUG_BOOTKEYS 196 if (!abort) 197 puts("key timeout\n"); 198 # endif 199 200 #ifdef CONFIG_SILENT_CONSOLE 201 if (abort) 202 gd->flags &= ~GD_FLG_SILENT; 203 #endif 204 205 return abort; 206 } 207 208 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 209 210 #ifdef CONFIG_MENUKEY 211 static int menukey = 0; 212 #endif 213 214 static __inline__ int abortboot(int bootdelay) 215 { 216 int abort = 0; 217 218 #ifdef CONFIG_MENUPROMPT 219 printf(CONFIG_MENUPROMPT); 220 #else 221 printf("Hit any key to stop autoboot: %2d ", bootdelay); 222 #endif 223 224 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 225 /* 226 * Check if key already pressed 227 * Don't check if bootdelay < 0 228 */ 229 if (bootdelay >= 0) { 230 if (tstc()) { /* we got a key press */ 231 (void) getc(); /* consume input */ 232 puts ("\b\b\b 0"); 233 abort = 1; /* don't auto boot */ 234 } 235 } 236 #endif 237 238 while ((bootdelay > 0) && (!abort)) { 239 int i; 240 241 --bootdelay; 242 /* delay 100 * 10ms */ 243 for (i=0; !abort && i<100; ++i) { 244 if (tstc()) { /* we got a key press */ 245 abort = 1; /* don't auto boot */ 246 bootdelay = 0; /* no more delay */ 247 # ifdef CONFIG_MENUKEY 248 menukey = getc(); 249 # else 250 (void) getc(); /* consume input */ 251 # endif 252 break; 253 } 254 udelay(10000); 255 } 256 257 printf("\b\b\b%2d ", bootdelay); 258 } 259 260 putc('\n'); 261 262 #ifdef CONFIG_SILENT_CONSOLE 263 if (abort) 264 gd->flags &= ~GD_FLG_SILENT; 265 #endif 266 267 return abort; 268 } 269 # endif /* CONFIG_AUTOBOOT_KEYED */ 270 #endif /* CONFIG_BOOTDELAY >= 0 */ 271 272 /****************************************************************************/ 273 274 void main_loop (void) 275 { 276 #ifndef CONFIG_SYS_HUSH_PARSER 277 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, }; 278 int len; 279 int rc = 1; 280 int flag; 281 #endif 282 283 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 284 char *s; 285 int bootdelay; 286 #endif 287 #ifdef CONFIG_PREBOOT 288 char *p; 289 #endif 290 #ifdef CONFIG_BOOTCOUNT_LIMIT 291 unsigned long bootcount = 0; 292 unsigned long bootlimit = 0; 293 char *bcs; 294 char bcs_set[16]; 295 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 296 297 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 298 ulong bmp = 0; /* default bitmap */ 299 extern int trab_vfd (ulong bitmap); 300 301 #ifdef CONFIG_MODEM_SUPPORT 302 if (do_mdm_init) 303 bmp = 1; /* alternate bitmap */ 304 #endif 305 trab_vfd (bmp); 306 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 307 308 #ifdef CONFIG_BOOTCOUNT_LIMIT 309 bootcount = bootcount_load(); 310 bootcount++; 311 bootcount_store (bootcount); 312 sprintf (bcs_set, "%lu", bootcount); 313 setenv ("bootcount", bcs_set); 314 bcs = getenv ("bootlimit"); 315 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 316 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 317 318 #ifdef CONFIG_MODEM_SUPPORT 319 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 320 if (do_mdm_init) { 321 char *str = strdup(getenv("mdm_cmd")); 322 setenv ("preboot", str); /* set or delete definition */ 323 if (str != NULL) 324 free (str); 325 mdm_init(); /* wait for modem connection */ 326 } 327 #endif /* CONFIG_MODEM_SUPPORT */ 328 329 #ifdef CONFIG_VERSION_VARIABLE 330 { 331 extern char version_string[]; 332 333 setenv ("ver", version_string); /* set version variable */ 334 } 335 #endif /* CONFIG_VERSION_VARIABLE */ 336 337 #ifdef CONFIG_SYS_HUSH_PARSER 338 u_boot_hush_start (); 339 #endif 340 341 #if defined(CONFIG_HUSH_INIT_VAR) 342 hush_init_var (); 343 #endif 344 345 #ifdef CONFIG_AUTO_COMPLETE 346 install_auto_complete(); 347 #endif 348 349 #ifdef CONFIG_PREBOOT 350 if ((p = getenv ("preboot")) != NULL) { 351 # ifdef CONFIG_AUTOBOOT_KEYED 352 int prev = disable_ctrlc(1); /* disable Control C checking */ 353 # endif 354 355 # ifndef CONFIG_SYS_HUSH_PARSER 356 run_command (p, 0); 357 # else 358 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 359 FLAG_EXIT_FROM_LOOP); 360 # endif 361 362 # ifdef CONFIG_AUTOBOOT_KEYED 363 disable_ctrlc(prev); /* restore Control C checking */ 364 # endif 365 } 366 #endif /* CONFIG_PREBOOT */ 367 368 #if defined(CONFIG_UPDATE_TFTP) 369 update_tftp (); 370 #endif /* CONFIG_UPDATE_TFTP */ 371 372 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 373 s = getenv ("bootdelay"); 374 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 375 376 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 377 378 # ifdef CONFIG_BOOT_RETRY_TIME 379 init_cmd_timeout (); 380 # endif /* CONFIG_BOOT_RETRY_TIME */ 381 382 #ifdef CONFIG_POST 383 if (gd->flags & GD_FLG_POSTFAIL) { 384 s = getenv("failbootcmd"); 385 } 386 else 387 #endif /* CONFIG_POST */ 388 #ifdef CONFIG_BOOTCOUNT_LIMIT 389 if (bootlimit && (bootcount > bootlimit)) { 390 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 391 (unsigned)bootlimit); 392 s = getenv ("altbootcmd"); 393 } 394 else 395 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 396 s = getenv ("bootcmd"); 397 398 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 399 400 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 401 # ifdef CONFIG_AUTOBOOT_KEYED 402 int prev = disable_ctrlc(1); /* disable Control C checking */ 403 # endif 404 405 # ifndef CONFIG_SYS_HUSH_PARSER 406 run_command (s, 0); 407 # else 408 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 409 FLAG_EXIT_FROM_LOOP); 410 # endif 411 412 # ifdef CONFIG_AUTOBOOT_KEYED 413 disable_ctrlc(prev); /* restore Control C checking */ 414 # endif 415 } 416 417 # ifdef CONFIG_MENUKEY 418 if (menukey == CONFIG_MENUKEY) { 419 s = getenv("menucmd"); 420 if (s) { 421 # ifndef CONFIG_SYS_HUSH_PARSER 422 run_command (s, 0); 423 # else 424 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 425 FLAG_EXIT_FROM_LOOP); 426 # endif 427 } 428 } 429 #endif /* CONFIG_MENUKEY */ 430 #endif /* CONFIG_BOOTDELAY */ 431 432 /* 433 * Main Loop for Monitor Command Processing 434 */ 435 #ifdef CONFIG_SYS_HUSH_PARSER 436 parse_file_outer(); 437 /* This point is never reached */ 438 for (;;); 439 #else 440 for (;;) { 441 #ifdef CONFIG_BOOT_RETRY_TIME 442 if (rc >= 0) { 443 /* Saw enough of a valid command to 444 * restart the timeout. 445 */ 446 reset_cmd_timeout(); 447 } 448 #endif 449 len = readline (CONFIG_SYS_PROMPT); 450 451 flag = 0; /* assume no special flags for now */ 452 if (len > 0) 453 strcpy (lastcommand, console_buffer); 454 else if (len == 0) 455 flag |= CMD_FLAG_REPEAT; 456 #ifdef CONFIG_BOOT_RETRY_TIME 457 else if (len == -2) { 458 /* -2 means timed out, retry autoboot 459 */ 460 puts ("\nTimed out waiting for command\n"); 461 # ifdef CONFIG_RESET_TO_RETRY 462 /* Reinit board to run initialization code again */ 463 do_reset (NULL, 0, 0, NULL); 464 # else 465 return; /* retry autoboot */ 466 # endif 467 } 468 #endif 469 470 if (len == -1) 471 puts ("<INTERRUPT>\n"); 472 else 473 rc = run_command (lastcommand, flag); 474 475 if (rc <= 0) { 476 /* invalid command or not repeatable, forget it */ 477 lastcommand[0] = 0; 478 } 479 } 480 #endif /*CONFIG_SYS_HUSH_PARSER*/ 481 } 482 483 #ifdef CONFIG_BOOT_RETRY_TIME 484 /*************************************************************************** 485 * initialize command line timeout 486 */ 487 void init_cmd_timeout(void) 488 { 489 char *s = getenv ("bootretry"); 490 491 if (s != NULL) 492 retry_time = (int)simple_strtol(s, NULL, 10); 493 else 494 retry_time = CONFIG_BOOT_RETRY_TIME; 495 496 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 497 retry_time = CONFIG_BOOT_RETRY_MIN; 498 } 499 500 /*************************************************************************** 501 * reset command line timeout to retry_time seconds 502 */ 503 void reset_cmd_timeout(void) 504 { 505 endtime = endtick(retry_time); 506 } 507 #endif 508 509 #ifdef CONFIG_CMDLINE_EDITING 510 511 /* 512 * cmdline-editing related codes from vivi. 513 * Author: Janghoon Lyu <nandy@mizi.com> 514 */ 515 516 #define putnstr(str,n) do { \ 517 printf ("%.*s", (int)n, str); \ 518 } while (0) 519 520 #define CTL_CH(c) ((c) - 'a' + 1) 521 #define CTL_BACKSPACE ('\b') 522 #define DEL ((char)255) 523 #define DEL7 ((char)127) 524 #define CREAD_HIST_CHAR ('!') 525 526 #define getcmd_putch(ch) putc(ch) 527 #define getcmd_getch() getc() 528 #define getcmd_cbeep() getcmd_putch('\a') 529 530 #define HIST_MAX 20 531 #define HIST_SIZE CONFIG_SYS_CBSIZE 532 533 static int hist_max = 0; 534 static int hist_add_idx = 0; 535 static int hist_cur = -1; 536 unsigned hist_num = 0; 537 538 char* hist_list[HIST_MAX]; 539 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ 540 541 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 542 543 static void hist_init(void) 544 { 545 int i; 546 547 hist_max = 0; 548 hist_add_idx = 0; 549 hist_cur = -1; 550 hist_num = 0; 551 552 for (i = 0; i < HIST_MAX; i++) { 553 hist_list[i] = hist_lines[i]; 554 hist_list[i][0] = '\0'; 555 } 556 } 557 558 static void cread_add_to_hist(char *line) 559 { 560 strcpy(hist_list[hist_add_idx], line); 561 562 if (++hist_add_idx >= HIST_MAX) 563 hist_add_idx = 0; 564 565 if (hist_add_idx > hist_max) 566 hist_max = hist_add_idx; 567 568 hist_num++; 569 } 570 571 static char* hist_prev(void) 572 { 573 char *ret; 574 int old_cur; 575 576 if (hist_cur < 0) 577 return NULL; 578 579 old_cur = hist_cur; 580 if (--hist_cur < 0) 581 hist_cur = hist_max; 582 583 if (hist_cur == hist_add_idx) { 584 hist_cur = old_cur; 585 ret = NULL; 586 } else 587 ret = hist_list[hist_cur]; 588 589 return (ret); 590 } 591 592 static char* hist_next(void) 593 { 594 char *ret; 595 596 if (hist_cur < 0) 597 return NULL; 598 599 if (hist_cur == hist_add_idx) 600 return NULL; 601 602 if (++hist_cur > hist_max) 603 hist_cur = 0; 604 605 if (hist_cur == hist_add_idx) { 606 ret = ""; 607 } else 608 ret = hist_list[hist_cur]; 609 610 return (ret); 611 } 612 613 #ifndef CONFIG_CMDLINE_EDITING 614 static void cread_print_hist_list(void) 615 { 616 int i; 617 unsigned long n; 618 619 n = hist_num - hist_max; 620 621 i = hist_add_idx + 1; 622 while (1) { 623 if (i > hist_max) 624 i = 0; 625 if (i == hist_add_idx) 626 break; 627 printf("%s\n", hist_list[i]); 628 n++; 629 i++; 630 } 631 } 632 #endif /* CONFIG_CMDLINE_EDITING */ 633 634 #define BEGINNING_OF_LINE() { \ 635 while (num) { \ 636 getcmd_putch(CTL_BACKSPACE); \ 637 num--; \ 638 } \ 639 } 640 641 #define ERASE_TO_EOL() { \ 642 if (num < eol_num) { \ 643 printf("%*s", (int)(eol_num - num), ""); \ 644 do { \ 645 getcmd_putch(CTL_BACKSPACE); \ 646 } while (--eol_num > num); \ 647 } \ 648 } 649 650 #define REFRESH_TO_EOL() { \ 651 if (num < eol_num) { \ 652 wlen = eol_num - num; \ 653 putnstr(buf + num, wlen); \ 654 num = eol_num; \ 655 } \ 656 } 657 658 static void cread_add_char(char ichar, int insert, unsigned long *num, 659 unsigned long *eol_num, char *buf, unsigned long len) 660 { 661 unsigned long wlen; 662 663 /* room ??? */ 664 if (insert || *num == *eol_num) { 665 if (*eol_num > len - 1) { 666 getcmd_cbeep(); 667 return; 668 } 669 (*eol_num)++; 670 } 671 672 if (insert) { 673 wlen = *eol_num - *num; 674 if (wlen > 1) { 675 memmove(&buf[*num+1], &buf[*num], wlen-1); 676 } 677 678 buf[*num] = ichar; 679 putnstr(buf + *num, wlen); 680 (*num)++; 681 while (--wlen) { 682 getcmd_putch(CTL_BACKSPACE); 683 } 684 } else { 685 /* echo the character */ 686 wlen = 1; 687 buf[*num] = ichar; 688 putnstr(buf + *num, wlen); 689 (*num)++; 690 } 691 } 692 693 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 694 unsigned long *eol_num, char *buf, unsigned long len) 695 { 696 while (strsize--) { 697 cread_add_char(*str, insert, num, eol_num, buf, len); 698 str++; 699 } 700 } 701 702 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 703 { 704 unsigned long num = 0; 705 unsigned long eol_num = 0; 706 unsigned long wlen; 707 char ichar; 708 int insert = 1; 709 int esc_len = 0; 710 char esc_save[8]; 711 int init_len = strlen(buf); 712 713 if (init_len) 714 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 715 716 while (1) { 717 #ifdef CONFIG_BOOT_RETRY_TIME 718 while (!tstc()) { /* while no incoming data */ 719 if (retry_time >= 0 && get_ticks() > endtime) 720 return (-2); /* timed out */ 721 WATCHDOG_RESET(); 722 } 723 #endif 724 725 ichar = getcmd_getch(); 726 727 if ((ichar == '\n') || (ichar == '\r')) { 728 putc('\n'); 729 break; 730 } 731 732 /* 733 * handle standard linux xterm esc sequences for arrow key, etc. 734 */ 735 if (esc_len != 0) { 736 if (esc_len == 1) { 737 if (ichar == '[') { 738 esc_save[esc_len] = ichar; 739 esc_len = 2; 740 } else { 741 cread_add_str(esc_save, esc_len, insert, 742 &num, &eol_num, buf, *len); 743 esc_len = 0; 744 } 745 continue; 746 } 747 748 switch (ichar) { 749 750 case 'D': /* <- key */ 751 ichar = CTL_CH('b'); 752 esc_len = 0; 753 break; 754 case 'C': /* -> key */ 755 ichar = CTL_CH('f'); 756 esc_len = 0; 757 break; /* pass off to ^F handler */ 758 case 'H': /* Home key */ 759 ichar = CTL_CH('a'); 760 esc_len = 0; 761 break; /* pass off to ^A handler */ 762 case 'A': /* up arrow */ 763 ichar = CTL_CH('p'); 764 esc_len = 0; 765 break; /* pass off to ^P handler */ 766 case 'B': /* down arrow */ 767 ichar = CTL_CH('n'); 768 esc_len = 0; 769 break; /* pass off to ^N handler */ 770 default: 771 esc_save[esc_len++] = ichar; 772 cread_add_str(esc_save, esc_len, insert, 773 &num, &eol_num, buf, *len); 774 esc_len = 0; 775 continue; 776 } 777 } 778 779 switch (ichar) { 780 case 0x1b: 781 if (esc_len == 0) { 782 esc_save[esc_len] = ichar; 783 esc_len = 1; 784 } else { 785 puts("impossible condition #876\n"); 786 esc_len = 0; 787 } 788 break; 789 790 case CTL_CH('a'): 791 BEGINNING_OF_LINE(); 792 break; 793 case CTL_CH('c'): /* ^C - break */ 794 *buf = '\0'; /* discard input */ 795 return (-1); 796 case CTL_CH('f'): 797 if (num < eol_num) { 798 getcmd_putch(buf[num]); 799 num++; 800 } 801 break; 802 case CTL_CH('b'): 803 if (num) { 804 getcmd_putch(CTL_BACKSPACE); 805 num--; 806 } 807 break; 808 case CTL_CH('d'): 809 if (num < eol_num) { 810 wlen = eol_num - num - 1; 811 if (wlen) { 812 memmove(&buf[num], &buf[num+1], wlen); 813 putnstr(buf + num, wlen); 814 } 815 816 getcmd_putch(' '); 817 do { 818 getcmd_putch(CTL_BACKSPACE); 819 } while (wlen--); 820 eol_num--; 821 } 822 break; 823 case CTL_CH('k'): 824 ERASE_TO_EOL(); 825 break; 826 case CTL_CH('e'): 827 REFRESH_TO_EOL(); 828 break; 829 case CTL_CH('o'): 830 insert = !insert; 831 break; 832 case CTL_CH('x'): 833 case CTL_CH('u'): 834 BEGINNING_OF_LINE(); 835 ERASE_TO_EOL(); 836 break; 837 case DEL: 838 case DEL7: 839 case 8: 840 if (num) { 841 wlen = eol_num - num; 842 num--; 843 memmove(&buf[num], &buf[num+1], wlen); 844 getcmd_putch(CTL_BACKSPACE); 845 putnstr(buf + num, wlen); 846 getcmd_putch(' '); 847 do { 848 getcmd_putch(CTL_BACKSPACE); 849 } while (wlen--); 850 eol_num--; 851 } 852 break; 853 case CTL_CH('p'): 854 case CTL_CH('n'): 855 { 856 char * hline; 857 858 esc_len = 0; 859 860 if (ichar == CTL_CH('p')) 861 hline = hist_prev(); 862 else 863 hline = hist_next(); 864 865 if (!hline) { 866 getcmd_cbeep(); 867 continue; 868 } 869 870 /* nuke the current line */ 871 /* first, go home */ 872 BEGINNING_OF_LINE(); 873 874 /* erase to end of line */ 875 ERASE_TO_EOL(); 876 877 /* copy new line into place and display */ 878 strcpy(buf, hline); 879 eol_num = strlen(buf); 880 REFRESH_TO_EOL(); 881 continue; 882 } 883 #ifdef CONFIG_AUTO_COMPLETE 884 case '\t': { 885 int num2, col; 886 887 /* do not autocomplete when in the middle */ 888 if (num < eol_num) { 889 getcmd_cbeep(); 890 break; 891 } 892 893 buf[num] = '\0'; 894 col = strlen(prompt) + eol_num; 895 num2 = num; 896 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 897 col = num2 - num; 898 num += col; 899 eol_num += col; 900 } 901 break; 902 } 903 #endif 904 default: 905 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 906 break; 907 } 908 } 909 *len = eol_num; 910 buf[eol_num] = '\0'; /* lose the newline */ 911 912 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 913 cread_add_to_hist(buf); 914 hist_cur = hist_add_idx; 915 916 return 0; 917 } 918 919 #endif /* CONFIG_CMDLINE_EDITING */ 920 921 /****************************************************************************/ 922 923 /* 924 * Prompt for input and read a line. 925 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 926 * time out when time goes past endtime (timebase time in ticks). 927 * Return: number of read characters 928 * -1 if break 929 * -2 if timed out 930 */ 931 int readline (const char *const prompt) 932 { 933 /* 934 * If console_buffer isn't 0-length the user will be prompted to modify 935 * it instead of entering it from scratch as desired. 936 */ 937 console_buffer[0] = '\0'; 938 939 return readline_into_buffer(prompt, console_buffer); 940 } 941 942 943 int readline_into_buffer (const char *const prompt, char * buffer) 944 { 945 char *p = buffer; 946 #ifdef CONFIG_CMDLINE_EDITING 947 unsigned int len = CONFIG_SYS_CBSIZE; 948 int rc; 949 static int initted = 0; 950 951 /* 952 * History uses a global array which is not 953 * writable until after relocation to RAM. 954 * Revert to non-history version if still 955 * running from flash. 956 */ 957 if (gd->flags & GD_FLG_RELOC) { 958 if (!initted) { 959 hist_init(); 960 initted = 1; 961 } 962 963 if (prompt) 964 puts (prompt); 965 966 rc = cread_line(prompt, p, &len); 967 return rc < 0 ? rc : len; 968 969 } else { 970 #endif /* CONFIG_CMDLINE_EDITING */ 971 char * p_buf = p; 972 int n = 0; /* buffer index */ 973 int plen = 0; /* prompt length */ 974 int col; /* output column cnt */ 975 char c; 976 977 /* print prompt */ 978 if (prompt) { 979 plen = strlen (prompt); 980 puts (prompt); 981 } 982 col = plen; 983 984 for (;;) { 985 #ifdef CONFIG_BOOT_RETRY_TIME 986 while (!tstc()) { /* while no incoming data */ 987 if (retry_time >= 0 && get_ticks() > endtime) 988 return (-2); /* timed out */ 989 WATCHDOG_RESET(); 990 } 991 #endif 992 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 993 994 #ifdef CONFIG_SHOW_ACTIVITY 995 while (!tstc()) { 996 extern void show_activity(int arg); 997 show_activity(0); 998 WATCHDOG_RESET(); 999 } 1000 #endif 1001 c = getc(); 1002 1003 /* 1004 * Special character handling 1005 */ 1006 switch (c) { 1007 case '\r': /* Enter */ 1008 case '\n': 1009 *p = '\0'; 1010 puts ("\r\n"); 1011 return (p - p_buf); 1012 1013 case '\0': /* nul */ 1014 continue; 1015 1016 case 0x03: /* ^C - break */ 1017 p_buf[0] = '\0'; /* discard input */ 1018 return (-1); 1019 1020 case 0x15: /* ^U - erase line */ 1021 while (col > plen) { 1022 puts (erase_seq); 1023 --col; 1024 } 1025 p = p_buf; 1026 n = 0; 1027 continue; 1028 1029 case 0x17: /* ^W - erase word */ 1030 p=delete_char(p_buf, p, &col, &n, plen); 1031 while ((n > 0) && (*p != ' ')) { 1032 p=delete_char(p_buf, p, &col, &n, plen); 1033 } 1034 continue; 1035 1036 case 0x08: /* ^H - backspace */ 1037 case 0x7F: /* DEL - backspace */ 1038 p=delete_char(p_buf, p, &col, &n, plen); 1039 continue; 1040 1041 default: 1042 /* 1043 * Must be a normal character then 1044 */ 1045 if (n < CONFIG_SYS_CBSIZE-2) { 1046 if (c == '\t') { /* expand TABs */ 1047 #ifdef CONFIG_AUTO_COMPLETE 1048 /* if auto completion triggered just continue */ 1049 *p = '\0'; 1050 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1051 p = p_buf + n; /* reset */ 1052 continue; 1053 } 1054 #endif 1055 puts (tab_seq+(col&07)); 1056 col += 8 - (col&07); 1057 } else { 1058 ++col; /* echo input */ 1059 putc (c); 1060 } 1061 *p++ = c; 1062 ++n; 1063 } else { /* Buffer full */ 1064 putc ('\a'); 1065 } 1066 } 1067 } 1068 #ifdef CONFIG_CMDLINE_EDITING 1069 } 1070 #endif 1071 } 1072 1073 /****************************************************************************/ 1074 1075 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1076 { 1077 char *s; 1078 1079 if (*np == 0) { 1080 return (p); 1081 } 1082 1083 if (*(--p) == '\t') { /* will retype the whole line */ 1084 while (*colp > plen) { 1085 puts (erase_seq); 1086 (*colp)--; 1087 } 1088 for (s=buffer; s<p; ++s) { 1089 if (*s == '\t') { 1090 puts (tab_seq+((*colp) & 07)); 1091 *colp += 8 - ((*colp) & 07); 1092 } else { 1093 ++(*colp); 1094 putc (*s); 1095 } 1096 } 1097 } else { 1098 puts (erase_seq); 1099 (*colp)--; 1100 } 1101 (*np)--; 1102 return (p); 1103 } 1104 1105 /****************************************************************************/ 1106 1107 int parse_line (char *line, char *argv[]) 1108 { 1109 int nargs = 0; 1110 1111 #ifdef DEBUG_PARSER 1112 printf ("parse_line: \"%s\"\n", line); 1113 #endif 1114 while (nargs < CONFIG_SYS_MAXARGS) { 1115 1116 /* skip any white space */ 1117 while ((*line == ' ') || (*line == '\t')) { 1118 ++line; 1119 } 1120 1121 if (*line == '\0') { /* end of line, no more args */ 1122 argv[nargs] = NULL; 1123 #ifdef DEBUG_PARSER 1124 printf ("parse_line: nargs=%d\n", nargs); 1125 #endif 1126 return (nargs); 1127 } 1128 1129 argv[nargs++] = line; /* begin of argument string */ 1130 1131 /* find end of string */ 1132 while (*line && (*line != ' ') && (*line != '\t')) { 1133 ++line; 1134 } 1135 1136 if (*line == '\0') { /* end of line, no more args */ 1137 argv[nargs] = NULL; 1138 #ifdef DEBUG_PARSER 1139 printf ("parse_line: nargs=%d\n", nargs); 1140 #endif 1141 return (nargs); 1142 } 1143 1144 *line++ = '\0'; /* terminate current arg */ 1145 } 1146 1147 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1148 1149 #ifdef DEBUG_PARSER 1150 printf ("parse_line: nargs=%d\n", nargs); 1151 #endif 1152 return (nargs); 1153 } 1154 1155 /****************************************************************************/ 1156 1157 static void process_macros (const char *input, char *output) 1158 { 1159 char c, prev; 1160 const char *varname_start = NULL; 1161 int inputcnt = strlen (input); 1162 int outputcnt = CONFIG_SYS_CBSIZE; 1163 int state = 0; /* 0 = waiting for '$' */ 1164 1165 /* 1 = waiting for '(' or '{' */ 1166 /* 2 = waiting for ')' or '}' */ 1167 /* 3 = waiting for ''' */ 1168 #ifdef DEBUG_PARSER 1169 char *output_start = output; 1170 1171 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1172 input); 1173 #endif 1174 1175 prev = '\0'; /* previous character */ 1176 1177 while (inputcnt && outputcnt) { 1178 c = *input++; 1179 inputcnt--; 1180 1181 if (state != 3) { 1182 /* remove one level of escape characters */ 1183 if ((c == '\\') && (prev != '\\')) { 1184 if (inputcnt-- == 0) 1185 break; 1186 prev = c; 1187 c = *input++; 1188 } 1189 } 1190 1191 switch (state) { 1192 case 0: /* Waiting for (unescaped) $ */ 1193 if ((c == '\'') && (prev != '\\')) { 1194 state = 3; 1195 break; 1196 } 1197 if ((c == '$') && (prev != '\\')) { 1198 state++; 1199 } else { 1200 *(output++) = c; 1201 outputcnt--; 1202 } 1203 break; 1204 case 1: /* Waiting for ( */ 1205 if (c == '(' || c == '{') { 1206 state++; 1207 varname_start = input; 1208 } else { 1209 state = 0; 1210 *(output++) = '$'; 1211 outputcnt--; 1212 1213 if (outputcnt) { 1214 *(output++) = c; 1215 outputcnt--; 1216 } 1217 } 1218 break; 1219 case 2: /* Waiting for ) */ 1220 if (c == ')' || c == '}') { 1221 int i; 1222 char envname[CONFIG_SYS_CBSIZE], *envval; 1223 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1224 1225 /* Get the varname */ 1226 for (i = 0; i < envcnt; i++) { 1227 envname[i] = varname_start[i]; 1228 } 1229 envname[i] = 0; 1230 1231 /* Get its value */ 1232 envval = getenv (envname); 1233 1234 /* Copy into the line if it exists */ 1235 if (envval != NULL) 1236 while ((*envval) && outputcnt) { 1237 *(output++) = *(envval++); 1238 outputcnt--; 1239 } 1240 /* Look for another '$' */ 1241 state = 0; 1242 } 1243 break; 1244 case 3: /* Waiting for ' */ 1245 if ((c == '\'') && (prev != '\\')) { 1246 state = 0; 1247 } else { 1248 *(output++) = c; 1249 outputcnt--; 1250 } 1251 break; 1252 } 1253 prev = c; 1254 } 1255 1256 if (outputcnt) 1257 *output = 0; 1258 else 1259 *(output - 1) = 0; 1260 1261 #ifdef DEBUG_PARSER 1262 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1263 strlen (output_start), output_start); 1264 #endif 1265 } 1266 1267 /**************************************************************************** 1268 * returns: 1269 * 1 - command executed, repeatable 1270 * 0 - command executed but not repeatable, interrupted commands are 1271 * always considered not repeatable 1272 * -1 - not executed (unrecognized, bootd recursion or too many args) 1273 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1274 * considered unrecognized) 1275 * 1276 * WARNING: 1277 * 1278 * We must create a temporary copy of the command since the command we get 1279 * may be the result from getenv(), which returns a pointer directly to 1280 * the environment data, which may change magicly when the command we run 1281 * creates or modifies environment variables (like "bootp" does). 1282 */ 1283 1284 int run_command (const char *cmd, int flag) 1285 { 1286 cmd_tbl_t *cmdtp; 1287 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1288 char *token; /* start of token in cmdbuf */ 1289 char *sep; /* end of token (separator) in cmdbuf */ 1290 char finaltoken[CONFIG_SYS_CBSIZE]; 1291 char *str = cmdbuf; 1292 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1293 int argc, inquotes; 1294 int repeatable = 1; 1295 int rc = 0; 1296 1297 #ifdef DEBUG_PARSER 1298 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1299 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1300 puts ("\"\n"); 1301 #endif 1302 1303 clear_ctrlc(); /* forget any previous Control C */ 1304 1305 if (!cmd || !*cmd) { 1306 return -1; /* empty command */ 1307 } 1308 1309 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1310 puts ("## Command too long!\n"); 1311 return -1; 1312 } 1313 1314 strcpy (cmdbuf, cmd); 1315 1316 /* Process separators and check for invalid 1317 * repeatable commands 1318 */ 1319 1320 #ifdef DEBUG_PARSER 1321 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1322 #endif 1323 while (*str) { 1324 1325 /* 1326 * Find separator, or string end 1327 * Allow simple escape of ';' by writing "\;" 1328 */ 1329 for (inquotes = 0, sep = str; *sep; sep++) { 1330 if ((*sep=='\'') && 1331 (*(sep-1) != '\\')) 1332 inquotes=!inquotes; 1333 1334 if (!inquotes && 1335 (*sep == ';') && /* separator */ 1336 ( sep != str) && /* past string start */ 1337 (*(sep-1) != '\\')) /* and NOT escaped */ 1338 break; 1339 } 1340 1341 /* 1342 * Limit the token to data between separators 1343 */ 1344 token = str; 1345 if (*sep) { 1346 str = sep + 1; /* start of command for next pass */ 1347 *sep = '\0'; 1348 } 1349 else 1350 str = sep; /* no more commands for next pass */ 1351 #ifdef DEBUG_PARSER 1352 printf ("token: \"%s\"\n", token); 1353 #endif 1354 1355 /* find macros in this token and replace them */ 1356 process_macros (token, finaltoken); 1357 1358 /* Extract arguments */ 1359 if ((argc = parse_line (finaltoken, argv)) == 0) { 1360 rc = -1; /* no command at all */ 1361 continue; 1362 } 1363 1364 /* Look up command in command table */ 1365 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1366 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1367 rc = -1; /* give up after bad command */ 1368 continue; 1369 } 1370 1371 /* found - check max args */ 1372 if (argc > cmdtp->maxargs) { 1373 cmd_usage(cmdtp); 1374 rc = -1; 1375 continue; 1376 } 1377 1378 #if defined(CONFIG_CMD_BOOTD) 1379 /* avoid "bootd" recursion */ 1380 if (cmdtp->cmd == do_bootd) { 1381 #ifdef DEBUG_PARSER 1382 printf ("[%s]\n", finaltoken); 1383 #endif 1384 if (flag & CMD_FLAG_BOOTD) { 1385 puts ("'bootd' recursion detected\n"); 1386 rc = -1; 1387 continue; 1388 } else { 1389 flag |= CMD_FLAG_BOOTD; 1390 } 1391 } 1392 #endif 1393 1394 /* OK - call function to do the command */ 1395 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1396 rc = -1; 1397 } 1398 1399 repeatable &= cmdtp->repeatable; 1400 1401 /* Did the user stop this? */ 1402 if (had_ctrlc ()) 1403 return -1; /* if stopped then not repeatable */ 1404 } 1405 1406 return rc ? rc : repeatable; 1407 } 1408 1409 /****************************************************************************/ 1410 1411 #if defined(CONFIG_CMD_RUN) 1412 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1413 { 1414 int i; 1415 1416 if (argc < 2) 1417 return cmd_usage(cmdtp); 1418 1419 for (i=1; i<argc; ++i) { 1420 char *arg; 1421 1422 if ((arg = getenv (argv[i])) == NULL) { 1423 printf ("## Error: \"%s\" not defined\n", argv[i]); 1424 return 1; 1425 } 1426 #ifndef CONFIG_SYS_HUSH_PARSER 1427 if (run_command (arg, flag) == -1) 1428 return 1; 1429 #else 1430 if (parse_string_outer(arg, 1431 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1432 return 1; 1433 #endif 1434 } 1435 return 0; 1436 } 1437 #endif 1438