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 #if defined(CONFIG_UPDATE_TFTP) 58 void update_tftp (void); 59 #endif /* CONFIG_UPDATE_TFTP */ 60 61 #define MAX_DELAY_STOP_STR 32 62 63 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 64 static int abortboot(int); 65 #endif 66 67 #undef DEBUG_PARSER 68 69 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ 70 71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 72 static char erase_seq[] = "\b \b"; /* erase sequence */ 73 static char tab_seq[] = " "; /* used to expand TABs */ 74 75 #ifdef CONFIG_BOOT_RETRY_TIME 76 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 77 static int retry_time = -1; /* -1 so can call readline before main_loop */ 78 #endif 79 80 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 81 82 #ifndef CONFIG_BOOT_RETRY_MIN 83 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 84 #endif 85 86 #ifdef CONFIG_MODEM_SUPPORT 87 int do_mdm_init = 0; 88 extern void mdm_init(void); /* defined in board.c */ 89 #endif 90 91 /*************************************************************************** 92 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 93 * returns: 0 - no key string, allow autoboot 94 * 1 - got key string, abort 95 */ 96 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 97 # if defined(CONFIG_AUTOBOOT_KEYED) 98 static __inline__ int abortboot(int bootdelay) 99 { 100 int abort = 0; 101 uint64_t etime = endtick(bootdelay); 102 struct { 103 char* str; 104 u_int len; 105 int retry; 106 } 107 delaykey [] = { 108 { str: getenv ("bootdelaykey"), retry: 1 }, 109 { str: getenv ("bootdelaykey2"), retry: 1 }, 110 { str: getenv ("bootstopkey"), retry: 0 }, 111 { str: getenv ("bootstopkey2"), retry: 0 }, 112 }; 113 114 char presskey [MAX_DELAY_STOP_STR]; 115 u_int presskey_len = 0; 116 u_int presskey_max = 0; 117 u_int i; 118 119 # ifdef CONFIG_AUTOBOOT_PROMPT 120 printf(CONFIG_AUTOBOOT_PROMPT); 121 # endif 122 123 # ifdef CONFIG_AUTOBOOT_DELAY_STR 124 if (delaykey[0].str == NULL) 125 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 126 # endif 127 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 128 if (delaykey[1].str == NULL) 129 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 130 # endif 131 # ifdef CONFIG_AUTOBOOT_STOP_STR 132 if (delaykey[2].str == NULL) 133 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 134 # endif 135 # ifdef CONFIG_AUTOBOOT_STOP_STR2 136 if (delaykey[3].str == NULL) 137 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 138 # endif 139 140 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 141 delaykey[i].len = delaykey[i].str == NULL ? 142 0 : strlen (delaykey[i].str); 143 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 144 MAX_DELAY_STOP_STR : delaykey[i].len; 145 146 presskey_max = presskey_max > delaykey[i].len ? 147 presskey_max : delaykey[i].len; 148 149 # if DEBUG_BOOTKEYS 150 printf("%s key:<%s>\n", 151 delaykey[i].retry ? "delay" : "stop", 152 delaykey[i].str ? delaykey[i].str : "NULL"); 153 # endif 154 } 155 156 /* In order to keep up with incoming data, check timeout only 157 * when catch up. 158 */ 159 do { 160 if (tstc()) { 161 if (presskey_len < presskey_max) { 162 presskey [presskey_len ++] = getc(); 163 } 164 else { 165 for (i = 0; i < presskey_max - 1; i ++) 166 presskey [i] = presskey [i + 1]; 167 168 presskey [i] = getc(); 169 } 170 } 171 172 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 173 if (delaykey[i].len > 0 && 174 presskey_len >= delaykey[i].len && 175 memcmp (presskey + presskey_len - delaykey[i].len, 176 delaykey[i].str, 177 delaykey[i].len) == 0) { 178 # if DEBUG_BOOTKEYS 179 printf("got %skey\n", 180 delaykey[i].retry ? "delay" : "stop"); 181 # endif 182 183 # ifdef CONFIG_BOOT_RETRY_TIME 184 /* don't retry auto boot */ 185 if (! delaykey[i].retry) 186 retry_time = -1; 187 # endif 188 abort = 1; 189 } 190 } 191 } while (!abort && get_ticks() <= etime); 192 193 # if DEBUG_BOOTKEYS 194 if (!abort) 195 puts("key timeout\n"); 196 # endif 197 198 #ifdef CONFIG_SILENT_CONSOLE 199 if (abort) 200 gd->flags &= ~GD_FLG_SILENT; 201 #endif 202 203 return abort; 204 } 205 206 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 207 208 #ifdef CONFIG_MENUKEY 209 static int menukey = 0; 210 #endif 211 212 static __inline__ int abortboot(int bootdelay) 213 { 214 int abort = 0; 215 216 #ifdef CONFIG_MENUPROMPT 217 printf(CONFIG_MENUPROMPT); 218 #else 219 printf("Hit any key to stop autoboot: %2d ", bootdelay); 220 #endif 221 222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 223 /* 224 * Check if key already pressed 225 * Don't check if bootdelay < 0 226 */ 227 if (bootdelay >= 0) { 228 if (tstc()) { /* we got a key press */ 229 (void) getc(); /* consume input */ 230 puts ("\b\b\b 0"); 231 abort = 1; /* don't auto boot */ 232 } 233 } 234 #endif 235 236 while ((bootdelay > 0) && (!abort)) { 237 int i; 238 239 --bootdelay; 240 /* delay 100 * 10ms */ 241 for (i=0; !abort && i<100; ++i) { 242 if (tstc()) { /* we got a key press */ 243 abort = 1; /* don't auto boot */ 244 bootdelay = 0; /* no more delay */ 245 # ifdef CONFIG_MENUKEY 246 menukey = getc(); 247 # else 248 (void) getc(); /* consume input */ 249 # endif 250 break; 251 } 252 udelay(10000); 253 } 254 255 printf("\b\b\b%2d ", bootdelay); 256 } 257 258 putc('\n'); 259 260 #ifdef CONFIG_SILENT_CONSOLE 261 if (abort) 262 gd->flags &= ~GD_FLG_SILENT; 263 #endif 264 265 return abort; 266 } 267 # endif /* CONFIG_AUTOBOOT_KEYED */ 268 #endif /* CONFIG_BOOTDELAY >= 0 */ 269 270 /****************************************************************************/ 271 272 void main_loop (void) 273 { 274 #ifndef CONFIG_SYS_HUSH_PARSER 275 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, }; 276 int len; 277 int rc = 1; 278 int flag; 279 #endif 280 281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 282 char *s; 283 int bootdelay; 284 #endif 285 #ifdef CONFIG_PREBOOT 286 char *p; 287 #endif 288 #ifdef CONFIG_BOOTCOUNT_LIMIT 289 unsigned long bootcount = 0; 290 unsigned long bootlimit = 0; 291 char *bcs; 292 char bcs_set[16]; 293 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 294 295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 296 ulong bmp = 0; /* default bitmap */ 297 extern int trab_vfd (ulong bitmap); 298 299 #ifdef CONFIG_MODEM_SUPPORT 300 if (do_mdm_init) 301 bmp = 1; /* alternate bitmap */ 302 #endif 303 trab_vfd (bmp); 304 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 305 306 #ifdef CONFIG_BOOTCOUNT_LIMIT 307 bootcount = bootcount_load(); 308 bootcount++; 309 bootcount_store (bootcount); 310 sprintf (bcs_set, "%lu", bootcount); 311 setenv ("bootcount", bcs_set); 312 bcs = getenv ("bootlimit"); 313 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 314 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 315 316 #ifdef CONFIG_MODEM_SUPPORT 317 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 318 if (do_mdm_init) { 319 char *str = strdup(getenv("mdm_cmd")); 320 setenv ("preboot", str); /* set or delete definition */ 321 if (str != NULL) 322 free (str); 323 mdm_init(); /* wait for modem connection */ 324 } 325 #endif /* CONFIG_MODEM_SUPPORT */ 326 327 #ifdef CONFIG_VERSION_VARIABLE 328 { 329 extern char version_string[]; 330 331 setenv ("ver", version_string); /* set version variable */ 332 } 333 #endif /* CONFIG_VERSION_VARIABLE */ 334 335 #ifdef CONFIG_SYS_HUSH_PARSER 336 u_boot_hush_start (); 337 #endif 338 339 #if defined(CONFIG_HUSH_INIT_VAR) 340 hush_init_var (); 341 #endif 342 343 #ifdef CONFIG_AUTO_COMPLETE 344 install_auto_complete(); 345 #endif 346 347 #ifdef CONFIG_PREBOOT 348 if ((p = getenv ("preboot")) != NULL) { 349 # ifdef CONFIG_AUTOBOOT_KEYED 350 int prev = disable_ctrlc(1); /* disable Control C checking */ 351 # endif 352 353 # ifndef CONFIG_SYS_HUSH_PARSER 354 run_command (p, 0); 355 # else 356 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 357 FLAG_EXIT_FROM_LOOP); 358 # endif 359 360 # ifdef CONFIG_AUTOBOOT_KEYED 361 disable_ctrlc(prev); /* restore Control C checking */ 362 # endif 363 } 364 #endif /* CONFIG_PREBOOT */ 365 366 #if defined(CONFIG_UPDATE_TFTP) 367 update_tftp (); 368 #endif /* CONFIG_UPDATE_TFTP */ 369 370 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 371 s = getenv ("bootdelay"); 372 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 373 374 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 375 376 # ifdef CONFIG_BOOT_RETRY_TIME 377 init_cmd_timeout (); 378 # endif /* CONFIG_BOOT_RETRY_TIME */ 379 380 #ifdef CONFIG_POST 381 if (gd->flags & GD_FLG_POSTFAIL) { 382 s = getenv("failbootcmd"); 383 } 384 else 385 #endif /* CONFIG_POST */ 386 #ifdef CONFIG_BOOTCOUNT_LIMIT 387 if (bootlimit && (bootcount > bootlimit)) { 388 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 389 (unsigned)bootlimit); 390 s = getenv ("altbootcmd"); 391 } 392 else 393 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 394 s = getenv ("bootcmd"); 395 396 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 397 398 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 399 # ifdef CONFIG_AUTOBOOT_KEYED 400 int prev = disable_ctrlc(1); /* disable Control C checking */ 401 # endif 402 403 # ifndef CONFIG_SYS_HUSH_PARSER 404 run_command (s, 0); 405 # else 406 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 407 FLAG_EXIT_FROM_LOOP); 408 # endif 409 410 # ifdef CONFIG_AUTOBOOT_KEYED 411 disable_ctrlc(prev); /* restore Control C checking */ 412 # endif 413 } 414 415 # ifdef CONFIG_MENUKEY 416 if (menukey == CONFIG_MENUKEY) { 417 s = getenv("menucmd"); 418 if (s) { 419 # ifndef CONFIG_SYS_HUSH_PARSER 420 run_command (s, 0); 421 # else 422 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 423 FLAG_EXIT_FROM_LOOP); 424 # endif 425 } 426 } 427 #endif /* CONFIG_MENUKEY */ 428 #endif /* CONFIG_BOOTDELAY */ 429 430 /* 431 * Main Loop for Monitor Command Processing 432 */ 433 #ifdef CONFIG_SYS_HUSH_PARSER 434 parse_file_outer(); 435 /* This point is never reached */ 436 for (;;); 437 #else 438 for (;;) { 439 #ifdef CONFIG_BOOT_RETRY_TIME 440 if (rc >= 0) { 441 /* Saw enough of a valid command to 442 * restart the timeout. 443 */ 444 reset_cmd_timeout(); 445 } 446 #endif 447 len = readline (CONFIG_SYS_PROMPT); 448 449 flag = 0; /* assume no special flags for now */ 450 if (len > 0) 451 strcpy (lastcommand, console_buffer); 452 else if (len == 0) 453 flag |= CMD_FLAG_REPEAT; 454 #ifdef CONFIG_BOOT_RETRY_TIME 455 else if (len == -2) { 456 /* -2 means timed out, retry autoboot 457 */ 458 puts ("\nTimed out waiting for command\n"); 459 # ifdef CONFIG_RESET_TO_RETRY 460 /* Reinit board to run initialization code again */ 461 do_reset (NULL, 0, 0, NULL); 462 # else 463 return; /* retry autoboot */ 464 # endif 465 } 466 #endif 467 468 if (len == -1) 469 puts ("<INTERRUPT>\n"); 470 else 471 rc = run_command (lastcommand, flag); 472 473 if (rc <= 0) { 474 /* invalid command or not repeatable, forget it */ 475 lastcommand[0] = 0; 476 } 477 } 478 #endif /*CONFIG_SYS_HUSH_PARSER*/ 479 } 480 481 #ifdef CONFIG_BOOT_RETRY_TIME 482 /*************************************************************************** 483 * initialize command line timeout 484 */ 485 void init_cmd_timeout(void) 486 { 487 char *s = getenv ("bootretry"); 488 489 if (s != NULL) 490 retry_time = (int)simple_strtol(s, NULL, 10); 491 else 492 retry_time = CONFIG_BOOT_RETRY_TIME; 493 494 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 495 retry_time = CONFIG_BOOT_RETRY_MIN; 496 } 497 498 /*************************************************************************** 499 * reset command line timeout to retry_time seconds 500 */ 501 void reset_cmd_timeout(void) 502 { 503 endtime = endtick(retry_time); 504 } 505 #endif 506 507 #ifdef CONFIG_CMDLINE_EDITING 508 509 /* 510 * cmdline-editing related codes from vivi. 511 * Author: Janghoon Lyu <nandy@mizi.com> 512 */ 513 514 #define putnstr(str,n) do { \ 515 printf ("%.*s", (int)n, str); \ 516 } while (0) 517 518 #define CTL_CH(c) ((c) - 'a' + 1) 519 #define CTL_BACKSPACE ('\b') 520 #define DEL ((char)255) 521 #define DEL7 ((char)127) 522 #define CREAD_HIST_CHAR ('!') 523 524 #define getcmd_putch(ch) putc(ch) 525 #define getcmd_getch() getc() 526 #define getcmd_cbeep() getcmd_putch('\a') 527 528 #define HIST_MAX 20 529 #define HIST_SIZE CONFIG_SYS_CBSIZE 530 531 static int hist_max = 0; 532 static int hist_add_idx = 0; 533 static int hist_cur = -1; 534 unsigned hist_num = 0; 535 536 char* hist_list[HIST_MAX]; 537 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ 538 539 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 540 541 static void hist_init(void) 542 { 543 int i; 544 545 hist_max = 0; 546 hist_add_idx = 0; 547 hist_cur = -1; 548 hist_num = 0; 549 550 for (i = 0; i < HIST_MAX; i++) { 551 hist_list[i] = hist_lines[i]; 552 hist_list[i][0] = '\0'; 553 } 554 } 555 556 static void cread_add_to_hist(char *line) 557 { 558 strcpy(hist_list[hist_add_idx], line); 559 560 if (++hist_add_idx >= HIST_MAX) 561 hist_add_idx = 0; 562 563 if (hist_add_idx > hist_max) 564 hist_max = hist_add_idx; 565 566 hist_num++; 567 } 568 569 static char* hist_prev(void) 570 { 571 char *ret; 572 int old_cur; 573 574 if (hist_cur < 0) 575 return NULL; 576 577 old_cur = hist_cur; 578 if (--hist_cur < 0) 579 hist_cur = hist_max; 580 581 if (hist_cur == hist_add_idx) { 582 hist_cur = old_cur; 583 ret = NULL; 584 } else 585 ret = hist_list[hist_cur]; 586 587 return (ret); 588 } 589 590 static char* hist_next(void) 591 { 592 char *ret; 593 594 if (hist_cur < 0) 595 return NULL; 596 597 if (hist_cur == hist_add_idx) 598 return NULL; 599 600 if (++hist_cur > hist_max) 601 hist_cur = 0; 602 603 if (hist_cur == hist_add_idx) { 604 ret = ""; 605 } else 606 ret = hist_list[hist_cur]; 607 608 return (ret); 609 } 610 611 #ifndef CONFIG_CMDLINE_EDITING 612 static void cread_print_hist_list(void) 613 { 614 int i; 615 unsigned long n; 616 617 n = hist_num - hist_max; 618 619 i = hist_add_idx + 1; 620 while (1) { 621 if (i > hist_max) 622 i = 0; 623 if (i == hist_add_idx) 624 break; 625 printf("%s\n", hist_list[i]); 626 n++; 627 i++; 628 } 629 } 630 #endif /* CONFIG_CMDLINE_EDITING */ 631 632 #define BEGINNING_OF_LINE() { \ 633 while (num) { \ 634 getcmd_putch(CTL_BACKSPACE); \ 635 num--; \ 636 } \ 637 } 638 639 #define ERASE_TO_EOL() { \ 640 if (num < eol_num) { \ 641 printf("%*s", (int)(eol_num - num), ""); \ 642 do { \ 643 getcmd_putch(CTL_BACKSPACE); \ 644 } while (--eol_num > num); \ 645 } \ 646 } 647 648 #define REFRESH_TO_EOL() { \ 649 if (num < eol_num) { \ 650 wlen = eol_num - num; \ 651 putnstr(buf + num, wlen); \ 652 num = eol_num; \ 653 } \ 654 } 655 656 static void cread_add_char(char ichar, int insert, unsigned long *num, 657 unsigned long *eol_num, char *buf, unsigned long len) 658 { 659 unsigned long wlen; 660 661 /* room ??? */ 662 if (insert || *num == *eol_num) { 663 if (*eol_num > len - 1) { 664 getcmd_cbeep(); 665 return; 666 } 667 (*eol_num)++; 668 } 669 670 if (insert) { 671 wlen = *eol_num - *num; 672 if (wlen > 1) { 673 memmove(&buf[*num+1], &buf[*num], wlen-1); 674 } 675 676 buf[*num] = ichar; 677 putnstr(buf + *num, wlen); 678 (*num)++; 679 while (--wlen) { 680 getcmd_putch(CTL_BACKSPACE); 681 } 682 } else { 683 /* echo the character */ 684 wlen = 1; 685 buf[*num] = ichar; 686 putnstr(buf + *num, wlen); 687 (*num)++; 688 } 689 } 690 691 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 692 unsigned long *eol_num, char *buf, unsigned long len) 693 { 694 while (strsize--) { 695 cread_add_char(*str, insert, num, eol_num, buf, len); 696 str++; 697 } 698 } 699 700 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 701 { 702 unsigned long num = 0; 703 unsigned long eol_num = 0; 704 unsigned long wlen; 705 char ichar; 706 int insert = 1; 707 int esc_len = 0; 708 char esc_save[8]; 709 int init_len = strlen(buf); 710 711 if (init_len) 712 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 713 714 while (1) { 715 #ifdef CONFIG_BOOT_RETRY_TIME 716 while (!tstc()) { /* while no incoming data */ 717 if (retry_time >= 0 && get_ticks() > endtime) 718 return (-2); /* timed out */ 719 WATCHDOG_RESET(); 720 } 721 #endif 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); 938 } 939 940 941 int readline_into_buffer (const char *const prompt, char * buffer) 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); 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 ((*line == ' ') || (*line == '\t')) { 1116 ++line; 1117 } 1118 1119 if (*line == '\0') { /* end of line, no more args */ 1120 argv[nargs] = NULL; 1121 #ifdef DEBUG_PARSER 1122 printf ("parse_line: nargs=%d\n", nargs); 1123 #endif 1124 return (nargs); 1125 } 1126 1127 argv[nargs++] = line; /* begin of argument string */ 1128 1129 /* find end of string */ 1130 while (*line && (*line != ' ') && (*line != '\t')) { 1131 ++line; 1132 } 1133 1134 if (*line == '\0') { /* end of line, no more args */ 1135 argv[nargs] = NULL; 1136 #ifdef DEBUG_PARSER 1137 printf ("parse_line: nargs=%d\n", nargs); 1138 #endif 1139 return (nargs); 1140 } 1141 1142 *line++ = '\0'; /* terminate current arg */ 1143 } 1144 1145 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1146 1147 #ifdef DEBUG_PARSER 1148 printf ("parse_line: nargs=%d\n", nargs); 1149 #endif 1150 return (nargs); 1151 } 1152 1153 /****************************************************************************/ 1154 1155 static void process_macros (const char *input, char *output) 1156 { 1157 char c, prev; 1158 const char *varname_start = NULL; 1159 int inputcnt = strlen (input); 1160 int outputcnt = CONFIG_SYS_CBSIZE; 1161 int state = 0; /* 0 = waiting for '$' */ 1162 1163 /* 1 = waiting for '(' or '{' */ 1164 /* 2 = waiting for ')' or '}' */ 1165 /* 3 = waiting for ''' */ 1166 #ifdef DEBUG_PARSER 1167 char *output_start = output; 1168 1169 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1170 input); 1171 #endif 1172 1173 prev = '\0'; /* previous character */ 1174 1175 while (inputcnt && outputcnt) { 1176 c = *input++; 1177 inputcnt--; 1178 1179 if (state != 3) { 1180 /* remove one level of escape characters */ 1181 if ((c == '\\') && (prev != '\\')) { 1182 if (inputcnt-- == 0) 1183 break; 1184 prev = c; 1185 c = *input++; 1186 } 1187 } 1188 1189 switch (state) { 1190 case 0: /* Waiting for (unescaped) $ */ 1191 if ((c == '\'') && (prev != '\\')) { 1192 state = 3; 1193 break; 1194 } 1195 if ((c == '$') && (prev != '\\')) { 1196 state++; 1197 } else { 1198 *(output++) = c; 1199 outputcnt--; 1200 } 1201 break; 1202 case 1: /* Waiting for ( */ 1203 if (c == '(' || c == '{') { 1204 state++; 1205 varname_start = input; 1206 } else { 1207 state = 0; 1208 *(output++) = '$'; 1209 outputcnt--; 1210 1211 if (outputcnt) { 1212 *(output++) = c; 1213 outputcnt--; 1214 } 1215 } 1216 break; 1217 case 2: /* Waiting for ) */ 1218 if (c == ')' || c == '}') { 1219 int i; 1220 char envname[CONFIG_SYS_CBSIZE], *envval; 1221 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1222 1223 /* Get the varname */ 1224 for (i = 0; i < envcnt; i++) { 1225 envname[i] = varname_start[i]; 1226 } 1227 envname[i] = 0; 1228 1229 /* Get its value */ 1230 envval = getenv (envname); 1231 1232 /* Copy into the line if it exists */ 1233 if (envval != NULL) 1234 while ((*envval) && outputcnt) { 1235 *(output++) = *(envval++); 1236 outputcnt--; 1237 } 1238 /* Look for another '$' */ 1239 state = 0; 1240 } 1241 break; 1242 case 3: /* Waiting for ' */ 1243 if ((c == '\'') && (prev != '\\')) { 1244 state = 0; 1245 } else { 1246 *(output++) = c; 1247 outputcnt--; 1248 } 1249 break; 1250 } 1251 prev = c; 1252 } 1253 1254 if (outputcnt) 1255 *output = 0; 1256 else 1257 *(output - 1) = 0; 1258 1259 #ifdef DEBUG_PARSER 1260 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1261 strlen (output_start), output_start); 1262 #endif 1263 } 1264 1265 /**************************************************************************** 1266 * returns: 1267 * 1 - command executed, repeatable 1268 * 0 - command executed but not repeatable, interrupted commands are 1269 * always considered not repeatable 1270 * -1 - not executed (unrecognized, bootd recursion or too many args) 1271 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1272 * considered unrecognized) 1273 * 1274 * WARNING: 1275 * 1276 * We must create a temporary copy of the command since the command we get 1277 * may be the result from getenv(), which returns a pointer directly to 1278 * the environment data, which may change magicly when the command we run 1279 * creates or modifies environment variables (like "bootp" does). 1280 */ 1281 1282 int run_command (const char *cmd, int flag) 1283 { 1284 cmd_tbl_t *cmdtp; 1285 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1286 char *token; /* start of token in cmdbuf */ 1287 char *sep; /* end of token (separator) in cmdbuf */ 1288 char finaltoken[CONFIG_SYS_CBSIZE]; 1289 char *str = cmdbuf; 1290 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1291 int argc, inquotes; 1292 int repeatable = 1; 1293 int rc = 0; 1294 1295 #ifdef DEBUG_PARSER 1296 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1297 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1298 puts ("\"\n"); 1299 #endif 1300 1301 clear_ctrlc(); /* forget any previous Control C */ 1302 1303 if (!cmd || !*cmd) { 1304 return -1; /* empty command */ 1305 } 1306 1307 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1308 puts ("## Command too long!\n"); 1309 return -1; 1310 } 1311 1312 strcpy (cmdbuf, cmd); 1313 1314 /* Process separators and check for invalid 1315 * repeatable commands 1316 */ 1317 1318 #ifdef DEBUG_PARSER 1319 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1320 #endif 1321 while (*str) { 1322 1323 /* 1324 * Find separator, or string end 1325 * Allow simple escape of ';' by writing "\;" 1326 */ 1327 for (inquotes = 0, sep = str; *sep; sep++) { 1328 if ((*sep=='\'') && 1329 (*(sep-1) != '\\')) 1330 inquotes=!inquotes; 1331 1332 if (!inquotes && 1333 (*sep == ';') && /* separator */ 1334 ( sep != str) && /* past string start */ 1335 (*(sep-1) != '\\')) /* and NOT escaped */ 1336 break; 1337 } 1338 1339 /* 1340 * Limit the token to data between separators 1341 */ 1342 token = str; 1343 if (*sep) { 1344 str = sep + 1; /* start of command for next pass */ 1345 *sep = '\0'; 1346 } 1347 else 1348 str = sep; /* no more commands for next pass */ 1349 #ifdef DEBUG_PARSER 1350 printf ("token: \"%s\"\n", token); 1351 #endif 1352 1353 /* find macros in this token and replace them */ 1354 process_macros (token, finaltoken); 1355 1356 /* Extract arguments */ 1357 if ((argc = parse_line (finaltoken, argv)) == 0) { 1358 rc = -1; /* no command at all */ 1359 continue; 1360 } 1361 1362 /* Look up command in command table */ 1363 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1364 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1365 rc = -1; /* give up after bad command */ 1366 continue; 1367 } 1368 1369 /* found - check max args */ 1370 if (argc > cmdtp->maxargs) { 1371 cmd_usage(cmdtp); 1372 rc = -1; 1373 continue; 1374 } 1375 1376 #if defined(CONFIG_CMD_BOOTD) 1377 /* avoid "bootd" recursion */ 1378 if (cmdtp->cmd == do_bootd) { 1379 #ifdef DEBUG_PARSER 1380 printf ("[%s]\n", finaltoken); 1381 #endif 1382 if (flag & CMD_FLAG_BOOTD) { 1383 puts ("'bootd' recursion detected\n"); 1384 rc = -1; 1385 continue; 1386 } else { 1387 flag |= CMD_FLAG_BOOTD; 1388 } 1389 } 1390 #endif 1391 1392 /* OK - call function to do the command */ 1393 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1394 rc = -1; 1395 } 1396 1397 repeatable &= cmdtp->repeatable; 1398 1399 /* Did the user stop this? */ 1400 if (had_ctrlc ()) 1401 return -1; /* if stopped then not repeatable */ 1402 } 1403 1404 return rc ? rc : repeatable; 1405 } 1406 1407 /****************************************************************************/ 1408 1409 #if defined(CONFIG_CMD_RUN) 1410 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1411 { 1412 int i; 1413 1414 if (argc < 2) 1415 return cmd_usage(cmdtp); 1416 1417 for (i=1; i<argc; ++i) { 1418 char *arg; 1419 1420 if ((arg = getenv (argv[i])) == NULL) { 1421 printf ("## Error: \"%s\" not defined\n", argv[i]); 1422 return 1; 1423 } 1424 #ifndef CONFIG_SYS_HUSH_PARSER 1425 if (run_command (arg, flag) == -1) 1426 return 1; 1427 #else 1428 if (parse_string_outer(arg, 1429 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1430 return 1; 1431 #endif 1432 } 1433 return 0; 1434 } 1435 #endif 1436