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) 521 522 #define MAX_CMDBUF_SIZE CONFIG_SYS_CBSIZE 523 524 #define CTL_BACKSPACE ('\b') 525 #define DEL ((char)255) 526 #define DEL7 ((char)127) 527 #define CREAD_HIST_CHAR ('!') 528 529 #define getcmd_putch(ch) putc(ch) 530 #define getcmd_getch() getc() 531 #define getcmd_cbeep() getcmd_putch('\a') 532 533 #define HIST_MAX 20 534 #define HIST_SIZE MAX_CMDBUF_SIZE 535 536 static int hist_max = 0; 537 static int hist_add_idx = 0; 538 static int hist_cur = -1; 539 unsigned hist_num = 0; 540 541 char* hist_list[HIST_MAX]; 542 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ 543 544 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 545 546 static void hist_init(void) 547 { 548 int i; 549 550 hist_max = 0; 551 hist_add_idx = 0; 552 hist_cur = -1; 553 hist_num = 0; 554 555 for (i = 0; i < HIST_MAX; i++) { 556 hist_list[i] = hist_lines[i]; 557 hist_list[i][0] = '\0'; 558 } 559 } 560 561 static void cread_add_to_hist(char *line) 562 { 563 strcpy(hist_list[hist_add_idx], line); 564 565 if (++hist_add_idx >= HIST_MAX) 566 hist_add_idx = 0; 567 568 if (hist_add_idx > hist_max) 569 hist_max = hist_add_idx; 570 571 hist_num++; 572 } 573 574 static char* hist_prev(void) 575 { 576 char *ret; 577 int old_cur; 578 579 if (hist_cur < 0) 580 return NULL; 581 582 old_cur = hist_cur; 583 if (--hist_cur < 0) 584 hist_cur = hist_max; 585 586 if (hist_cur == hist_add_idx) { 587 hist_cur = old_cur; 588 ret = NULL; 589 } else 590 ret = hist_list[hist_cur]; 591 592 return (ret); 593 } 594 595 static char* hist_next(void) 596 { 597 char *ret; 598 599 if (hist_cur < 0) 600 return NULL; 601 602 if (hist_cur == hist_add_idx) 603 return NULL; 604 605 if (++hist_cur > hist_max) 606 hist_cur = 0; 607 608 if (hist_cur == hist_add_idx) { 609 ret = ""; 610 } else 611 ret = hist_list[hist_cur]; 612 613 return (ret); 614 } 615 616 #ifndef CONFIG_CMDLINE_EDITING 617 static void cread_print_hist_list(void) 618 { 619 int i; 620 unsigned long n; 621 622 n = hist_num - hist_max; 623 624 i = hist_add_idx + 1; 625 while (1) { 626 if (i > hist_max) 627 i = 0; 628 if (i == hist_add_idx) 629 break; 630 printf("%s\n", hist_list[i]); 631 n++; 632 i++; 633 } 634 } 635 #endif /* CONFIG_CMDLINE_EDITING */ 636 637 #define BEGINNING_OF_LINE() { \ 638 while (num) { \ 639 getcmd_putch(CTL_BACKSPACE); \ 640 num--; \ 641 } \ 642 } 643 644 #define ERASE_TO_EOL() { \ 645 if (num < eol_num) { \ 646 printf("%*s", (int)(eol_num - num), ""); \ 647 do { \ 648 getcmd_putch(CTL_BACKSPACE); \ 649 } while (--eol_num > num); \ 650 } \ 651 } 652 653 #define REFRESH_TO_EOL() { \ 654 if (num < eol_num) { \ 655 wlen = eol_num - num; \ 656 putnstr(buf + num, wlen); \ 657 num = eol_num; \ 658 } \ 659 } 660 661 static void cread_add_char(char ichar, int insert, unsigned long *num, 662 unsigned long *eol_num, char *buf, unsigned long len) 663 { 664 unsigned long wlen; 665 666 /* room ??? */ 667 if (insert || *num == *eol_num) { 668 if (*eol_num > len - 1) { 669 getcmd_cbeep(); 670 return; 671 } 672 (*eol_num)++; 673 } 674 675 if (insert) { 676 wlen = *eol_num - *num; 677 if (wlen > 1) { 678 memmove(&buf[*num+1], &buf[*num], wlen-1); 679 } 680 681 buf[*num] = ichar; 682 putnstr(buf + *num, wlen); 683 (*num)++; 684 while (--wlen) { 685 getcmd_putch(CTL_BACKSPACE); 686 } 687 } else { 688 /* echo the character */ 689 wlen = 1; 690 buf[*num] = ichar; 691 putnstr(buf + *num, wlen); 692 (*num)++; 693 } 694 } 695 696 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 697 unsigned long *eol_num, char *buf, unsigned long len) 698 { 699 while (strsize--) { 700 cread_add_char(*str, insert, num, eol_num, buf, len); 701 str++; 702 } 703 } 704 705 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 706 { 707 unsigned long num = 0; 708 unsigned long eol_num = 0; 709 unsigned long wlen; 710 char ichar; 711 int insert = 1; 712 int esc_len = 0; 713 char esc_save[8]; 714 int init_len = strlen(buf); 715 716 if (init_len) 717 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 718 719 while (1) { 720 #ifdef CONFIG_BOOT_RETRY_TIME 721 while (!tstc()) { /* while no incoming data */ 722 if (retry_time >= 0 && get_ticks() > endtime) 723 return (-2); /* timed out */ 724 WATCHDOG_RESET(); 725 } 726 #endif 727 728 ichar = getcmd_getch(); 729 730 if ((ichar == '\n') || (ichar == '\r')) { 731 putc('\n'); 732 break; 733 } 734 735 /* 736 * handle standard linux xterm esc sequences for arrow key, etc. 737 */ 738 if (esc_len != 0) { 739 if (esc_len == 1) { 740 if (ichar == '[') { 741 esc_save[esc_len] = ichar; 742 esc_len = 2; 743 } else { 744 cread_add_str(esc_save, esc_len, insert, 745 &num, &eol_num, buf, *len); 746 esc_len = 0; 747 } 748 continue; 749 } 750 751 switch (ichar) { 752 753 case 'D': /* <- key */ 754 ichar = CTL_CH('b'); 755 esc_len = 0; 756 break; 757 case 'C': /* -> key */ 758 ichar = CTL_CH('f'); 759 esc_len = 0; 760 break; /* pass off to ^F handler */ 761 case 'H': /* Home key */ 762 ichar = CTL_CH('a'); 763 esc_len = 0; 764 break; /* pass off to ^A handler */ 765 case 'A': /* up arrow */ 766 ichar = CTL_CH('p'); 767 esc_len = 0; 768 break; /* pass off to ^P handler */ 769 case 'B': /* down arrow */ 770 ichar = CTL_CH('n'); 771 esc_len = 0; 772 break; /* pass off to ^N handler */ 773 default: 774 esc_save[esc_len++] = ichar; 775 cread_add_str(esc_save, esc_len, insert, 776 &num, &eol_num, buf, *len); 777 esc_len = 0; 778 continue; 779 } 780 } 781 782 switch (ichar) { 783 case 0x1b: 784 if (esc_len == 0) { 785 esc_save[esc_len] = ichar; 786 esc_len = 1; 787 } else { 788 puts("impossible condition #876\n"); 789 esc_len = 0; 790 } 791 break; 792 793 case CTL_CH('a'): 794 BEGINNING_OF_LINE(); 795 break; 796 case CTL_CH('c'): /* ^C - break */ 797 *buf = '\0'; /* discard input */ 798 return (-1); 799 case CTL_CH('f'): 800 if (num < eol_num) { 801 getcmd_putch(buf[num]); 802 num++; 803 } 804 break; 805 case CTL_CH('b'): 806 if (num) { 807 getcmd_putch(CTL_BACKSPACE); 808 num--; 809 } 810 break; 811 case CTL_CH('d'): 812 if (num < eol_num) { 813 wlen = eol_num - num - 1; 814 if (wlen) { 815 memmove(&buf[num], &buf[num+1], wlen); 816 putnstr(buf + num, wlen); 817 } 818 819 getcmd_putch(' '); 820 do { 821 getcmd_putch(CTL_BACKSPACE); 822 } while (wlen--); 823 eol_num--; 824 } 825 break; 826 case CTL_CH('k'): 827 ERASE_TO_EOL(); 828 break; 829 case CTL_CH('e'): 830 REFRESH_TO_EOL(); 831 break; 832 case CTL_CH('o'): 833 insert = !insert; 834 break; 835 case CTL_CH('x'): 836 case CTL_CH('u'): 837 BEGINNING_OF_LINE(); 838 ERASE_TO_EOL(); 839 break; 840 case DEL: 841 case DEL7: 842 case 8: 843 if (num) { 844 wlen = eol_num - num; 845 num--; 846 memmove(&buf[num], &buf[num+1], wlen); 847 getcmd_putch(CTL_BACKSPACE); 848 putnstr(buf + num, wlen); 849 getcmd_putch(' '); 850 do { 851 getcmd_putch(CTL_BACKSPACE); 852 } while (wlen--); 853 eol_num--; 854 } 855 break; 856 case CTL_CH('p'): 857 case CTL_CH('n'): 858 { 859 char * hline; 860 861 esc_len = 0; 862 863 if (ichar == CTL_CH('p')) 864 hline = hist_prev(); 865 else 866 hline = hist_next(); 867 868 if (!hline) { 869 getcmd_cbeep(); 870 continue; 871 } 872 873 /* nuke the current line */ 874 /* first, go home */ 875 BEGINNING_OF_LINE(); 876 877 /* erase to end of line */ 878 ERASE_TO_EOL(); 879 880 /* copy new line into place and display */ 881 strcpy(buf, hline); 882 eol_num = strlen(buf); 883 REFRESH_TO_EOL(); 884 continue; 885 } 886 #ifdef CONFIG_AUTO_COMPLETE 887 case '\t': { 888 int num2, col; 889 890 /* do not autocomplete when in the middle */ 891 if (num < eol_num) { 892 getcmd_cbeep(); 893 break; 894 } 895 896 buf[num] = '\0'; 897 col = strlen(prompt) + eol_num; 898 num2 = num; 899 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 900 col = num2 - num; 901 num += col; 902 eol_num += col; 903 } 904 break; 905 } 906 #endif 907 default: 908 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 909 break; 910 } 911 } 912 *len = eol_num; 913 buf[eol_num] = '\0'; /* lose the newline */ 914 915 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 916 cread_add_to_hist(buf); 917 hist_cur = hist_add_idx; 918 919 return 0; 920 } 921 922 #endif /* CONFIG_CMDLINE_EDITING */ 923 924 /****************************************************************************/ 925 926 /* 927 * Prompt for input and read a line. 928 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 929 * time out when time goes past endtime (timebase time in ticks). 930 * Return: number of read characters 931 * -1 if break 932 * -2 if timed out 933 */ 934 int readline (const char *const prompt) 935 { 936 /* 937 * If console_buffer isn't 0-length the user will be prompted to modify 938 * it instead of entering it from scratch as desired. 939 */ 940 console_buffer[0] = '\0'; 941 942 return readline_into_buffer(prompt, console_buffer); 943 } 944 945 946 int readline_into_buffer (const char *const prompt, char * buffer) 947 { 948 char *p = buffer; 949 #ifdef CONFIG_CMDLINE_EDITING 950 unsigned int len=MAX_CMDBUF_SIZE; 951 int rc; 952 static int initted = 0; 953 954 /* 955 * History uses a global array which is not 956 * writable until after relocation to RAM. 957 * Revert to non-history version if still 958 * running from flash. 959 */ 960 if (gd->flags & GD_FLG_RELOC) { 961 if (!initted) { 962 hist_init(); 963 initted = 1; 964 } 965 966 if (prompt) 967 puts (prompt); 968 969 rc = cread_line(prompt, p, &len); 970 return rc < 0 ? rc : len; 971 972 } else { 973 #endif /* CONFIG_CMDLINE_EDITING */ 974 char * p_buf = p; 975 int n = 0; /* buffer index */ 976 int plen = 0; /* prompt length */ 977 int col; /* output column cnt */ 978 char c; 979 980 /* print prompt */ 981 if (prompt) { 982 plen = strlen (prompt); 983 puts (prompt); 984 } 985 col = plen; 986 987 for (;;) { 988 #ifdef CONFIG_BOOT_RETRY_TIME 989 while (!tstc()) { /* while no incoming data */ 990 if (retry_time >= 0 && get_ticks() > endtime) 991 return (-2); /* timed out */ 992 WATCHDOG_RESET(); 993 } 994 #endif 995 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 996 997 #ifdef CONFIG_SHOW_ACTIVITY 998 while (!tstc()) { 999 extern void show_activity(int arg); 1000 show_activity(0); 1001 WATCHDOG_RESET(); 1002 } 1003 #endif 1004 c = getc(); 1005 1006 /* 1007 * Special character handling 1008 */ 1009 switch (c) { 1010 case '\r': /* Enter */ 1011 case '\n': 1012 *p = '\0'; 1013 puts ("\r\n"); 1014 return (p - p_buf); 1015 1016 case '\0': /* nul */ 1017 continue; 1018 1019 case 0x03: /* ^C - break */ 1020 p_buf[0] = '\0'; /* discard input */ 1021 return (-1); 1022 1023 case 0x15: /* ^U - erase line */ 1024 while (col > plen) { 1025 puts (erase_seq); 1026 --col; 1027 } 1028 p = p_buf; 1029 n = 0; 1030 continue; 1031 1032 case 0x17: /* ^W - erase word */ 1033 p=delete_char(p_buf, p, &col, &n, plen); 1034 while ((n > 0) && (*p != ' ')) { 1035 p=delete_char(p_buf, p, &col, &n, plen); 1036 } 1037 continue; 1038 1039 case 0x08: /* ^H - backspace */ 1040 case 0x7F: /* DEL - backspace */ 1041 p=delete_char(p_buf, p, &col, &n, plen); 1042 continue; 1043 1044 default: 1045 /* 1046 * Must be a normal character then 1047 */ 1048 if (n < CONFIG_SYS_CBSIZE-2) { 1049 if (c == '\t') { /* expand TABs */ 1050 #ifdef CONFIG_AUTO_COMPLETE 1051 /* if auto completion triggered just continue */ 1052 *p = '\0'; 1053 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1054 p = p_buf + n; /* reset */ 1055 continue; 1056 } 1057 #endif 1058 puts (tab_seq+(col&07)); 1059 col += 8 - (col&07); 1060 } else { 1061 ++col; /* echo input */ 1062 putc (c); 1063 } 1064 *p++ = c; 1065 ++n; 1066 } else { /* Buffer full */ 1067 putc ('\a'); 1068 } 1069 } 1070 } 1071 #ifdef CONFIG_CMDLINE_EDITING 1072 } 1073 #endif 1074 } 1075 1076 /****************************************************************************/ 1077 1078 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1079 { 1080 char *s; 1081 1082 if (*np == 0) { 1083 return (p); 1084 } 1085 1086 if (*(--p) == '\t') { /* will retype the whole line */ 1087 while (*colp > plen) { 1088 puts (erase_seq); 1089 (*colp)--; 1090 } 1091 for (s=buffer; s<p; ++s) { 1092 if (*s == '\t') { 1093 puts (tab_seq+((*colp) & 07)); 1094 *colp += 8 - ((*colp) & 07); 1095 } else { 1096 ++(*colp); 1097 putc (*s); 1098 } 1099 } 1100 } else { 1101 puts (erase_seq); 1102 (*colp)--; 1103 } 1104 (*np)--; 1105 return (p); 1106 } 1107 1108 /****************************************************************************/ 1109 1110 int parse_line (char *line, char *argv[]) 1111 { 1112 int nargs = 0; 1113 1114 #ifdef DEBUG_PARSER 1115 printf ("parse_line: \"%s\"\n", line); 1116 #endif 1117 while (nargs < CONFIG_SYS_MAXARGS) { 1118 1119 /* skip any white space */ 1120 while ((*line == ' ') || (*line == '\t')) { 1121 ++line; 1122 } 1123 1124 if (*line == '\0') { /* end of line, no more args */ 1125 argv[nargs] = NULL; 1126 #ifdef DEBUG_PARSER 1127 printf ("parse_line: nargs=%d\n", nargs); 1128 #endif 1129 return (nargs); 1130 } 1131 1132 argv[nargs++] = line; /* begin of argument string */ 1133 1134 /* find end of string */ 1135 while (*line && (*line != ' ') && (*line != '\t')) { 1136 ++line; 1137 } 1138 1139 if (*line == '\0') { /* end of line, no more args */ 1140 argv[nargs] = NULL; 1141 #ifdef DEBUG_PARSER 1142 printf ("parse_line: nargs=%d\n", nargs); 1143 #endif 1144 return (nargs); 1145 } 1146 1147 *line++ = '\0'; /* terminate current arg */ 1148 } 1149 1150 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1151 1152 #ifdef DEBUG_PARSER 1153 printf ("parse_line: nargs=%d\n", nargs); 1154 #endif 1155 return (nargs); 1156 } 1157 1158 /****************************************************************************/ 1159 1160 static void process_macros (const char *input, char *output) 1161 { 1162 char c, prev; 1163 const char *varname_start = NULL; 1164 int inputcnt = strlen (input); 1165 int outputcnt = CONFIG_SYS_CBSIZE; 1166 int state = 0; /* 0 = waiting for '$' */ 1167 1168 /* 1 = waiting for '(' or '{' */ 1169 /* 2 = waiting for ')' or '}' */ 1170 /* 3 = waiting for ''' */ 1171 #ifdef DEBUG_PARSER 1172 char *output_start = output; 1173 1174 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1175 input); 1176 #endif 1177 1178 prev = '\0'; /* previous character */ 1179 1180 while (inputcnt && outputcnt) { 1181 c = *input++; 1182 inputcnt--; 1183 1184 if (state != 3) { 1185 /* remove one level of escape characters */ 1186 if ((c == '\\') && (prev != '\\')) { 1187 if (inputcnt-- == 0) 1188 break; 1189 prev = c; 1190 c = *input++; 1191 } 1192 } 1193 1194 switch (state) { 1195 case 0: /* Waiting for (unescaped) $ */ 1196 if ((c == '\'') && (prev != '\\')) { 1197 state = 3; 1198 break; 1199 } 1200 if ((c == '$') && (prev != '\\')) { 1201 state++; 1202 } else { 1203 *(output++) = c; 1204 outputcnt--; 1205 } 1206 break; 1207 case 1: /* Waiting for ( */ 1208 if (c == '(' || c == '{') { 1209 state++; 1210 varname_start = input; 1211 } else { 1212 state = 0; 1213 *(output++) = '$'; 1214 outputcnt--; 1215 1216 if (outputcnt) { 1217 *(output++) = c; 1218 outputcnt--; 1219 } 1220 } 1221 break; 1222 case 2: /* Waiting for ) */ 1223 if (c == ')' || c == '}') { 1224 int i; 1225 char envname[CONFIG_SYS_CBSIZE], *envval; 1226 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1227 1228 /* Get the varname */ 1229 for (i = 0; i < envcnt; i++) { 1230 envname[i] = varname_start[i]; 1231 } 1232 envname[i] = 0; 1233 1234 /* Get its value */ 1235 envval = getenv (envname); 1236 1237 /* Copy into the line if it exists */ 1238 if (envval != NULL) 1239 while ((*envval) && outputcnt) { 1240 *(output++) = *(envval++); 1241 outputcnt--; 1242 } 1243 /* Look for another '$' */ 1244 state = 0; 1245 } 1246 break; 1247 case 3: /* Waiting for ' */ 1248 if ((c == '\'') && (prev != '\\')) { 1249 state = 0; 1250 } else { 1251 *(output++) = c; 1252 outputcnt--; 1253 } 1254 break; 1255 } 1256 prev = c; 1257 } 1258 1259 if (outputcnt) 1260 *output = 0; 1261 else 1262 *(output - 1) = 0; 1263 1264 #ifdef DEBUG_PARSER 1265 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1266 strlen (output_start), output_start); 1267 #endif 1268 } 1269 1270 /**************************************************************************** 1271 * returns: 1272 * 1 - command executed, repeatable 1273 * 0 - command executed but not repeatable, interrupted commands are 1274 * always considered not repeatable 1275 * -1 - not executed (unrecognized, bootd recursion or too many args) 1276 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1277 * considered unrecognized) 1278 * 1279 * WARNING: 1280 * 1281 * We must create a temporary copy of the command since the command we get 1282 * may be the result from getenv(), which returns a pointer directly to 1283 * the environment data, which may change magicly when the command we run 1284 * creates or modifies environment variables (like "bootp" does). 1285 */ 1286 1287 int run_command (const char *cmd, int flag) 1288 { 1289 cmd_tbl_t *cmdtp; 1290 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1291 char *token; /* start of token in cmdbuf */ 1292 char *sep; /* end of token (separator) in cmdbuf */ 1293 char finaltoken[CONFIG_SYS_CBSIZE]; 1294 char *str = cmdbuf; 1295 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1296 int argc, inquotes; 1297 int repeatable = 1; 1298 int rc = 0; 1299 1300 #ifdef DEBUG_PARSER 1301 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1302 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1303 puts ("\"\n"); 1304 #endif 1305 1306 clear_ctrlc(); /* forget any previous Control C */ 1307 1308 if (!cmd || !*cmd) { 1309 return -1; /* empty command */ 1310 } 1311 1312 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1313 puts ("## Command too long!\n"); 1314 return -1; 1315 } 1316 1317 strcpy (cmdbuf, cmd); 1318 1319 /* Process separators and check for invalid 1320 * repeatable commands 1321 */ 1322 1323 #ifdef DEBUG_PARSER 1324 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1325 #endif 1326 while (*str) { 1327 1328 /* 1329 * Find separator, or string end 1330 * Allow simple escape of ';' by writing "\;" 1331 */ 1332 for (inquotes = 0, sep = str; *sep; sep++) { 1333 if ((*sep=='\'') && 1334 (*(sep-1) != '\\')) 1335 inquotes=!inquotes; 1336 1337 if (!inquotes && 1338 (*sep == ';') && /* separator */ 1339 ( sep != str) && /* past string start */ 1340 (*(sep-1) != '\\')) /* and NOT escaped */ 1341 break; 1342 } 1343 1344 /* 1345 * Limit the token to data between separators 1346 */ 1347 token = str; 1348 if (*sep) { 1349 str = sep + 1; /* start of command for next pass */ 1350 *sep = '\0'; 1351 } 1352 else 1353 str = sep; /* no more commands for next pass */ 1354 #ifdef DEBUG_PARSER 1355 printf ("token: \"%s\"\n", token); 1356 #endif 1357 1358 /* find macros in this token and replace them */ 1359 process_macros (token, finaltoken); 1360 1361 /* Extract arguments */ 1362 if ((argc = parse_line (finaltoken, argv)) == 0) { 1363 rc = -1; /* no command at all */ 1364 continue; 1365 } 1366 1367 /* Look up command in command table */ 1368 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1369 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1370 rc = -1; /* give up after bad command */ 1371 continue; 1372 } 1373 1374 /* found - check max args */ 1375 if (argc > cmdtp->maxargs) { 1376 cmd_usage(cmdtp); 1377 rc = -1; 1378 continue; 1379 } 1380 1381 #if defined(CONFIG_CMD_BOOTD) 1382 /* avoid "bootd" recursion */ 1383 if (cmdtp->cmd == do_bootd) { 1384 #ifdef DEBUG_PARSER 1385 printf ("[%s]\n", finaltoken); 1386 #endif 1387 if (flag & CMD_FLAG_BOOTD) { 1388 puts ("'bootd' recursion detected\n"); 1389 rc = -1; 1390 continue; 1391 } else { 1392 flag |= CMD_FLAG_BOOTD; 1393 } 1394 } 1395 #endif 1396 1397 /* OK - call function to do the command */ 1398 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1399 rc = -1; 1400 } 1401 1402 repeatable &= cmdtp->repeatable; 1403 1404 /* Did the user stop this? */ 1405 if (had_ctrlc ()) 1406 return -1; /* if stopped then not repeatable */ 1407 } 1408 1409 return rc ? rc : repeatable; 1410 } 1411 1412 /****************************************************************************/ 1413 1414 #if defined(CONFIG_CMD_RUN) 1415 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1416 { 1417 int i; 1418 1419 if (argc < 2) 1420 return cmd_usage(cmdtp); 1421 1422 for (i=1; i<argc; ++i) { 1423 char *arg; 1424 1425 if ((arg = getenv (argv[i])) == NULL) { 1426 printf ("## Error: \"%s\" not defined\n", argv[i]); 1427 return 1; 1428 } 1429 #ifndef CONFIG_SYS_HUSH_PARSER 1430 if (run_command (arg, flag) == -1) 1431 return 1; 1432 #else 1433 if (parse_string_outer(arg, 1434 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1435 return 1; 1436 #endif 1437 } 1438 return 0; 1439 } 1440 #endif 1441