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 int tmp; \ 647 for (tmp = num; tmp < eol_num; tmp++) \ 648 getcmd_putch(' '); \ 649 while (tmp-- > num) \ 650 getcmd_putch(CTL_BACKSPACE); \ 651 eol_num = num; \ 652 } \ 653 } 654 655 #define REFRESH_TO_EOL() { \ 656 if (num < eol_num) { \ 657 wlen = eol_num - num; \ 658 putnstr(buf + num, wlen); \ 659 num = eol_num; \ 660 } \ 661 } 662 663 static void cread_add_char(char ichar, int insert, unsigned long *num, 664 unsigned long *eol_num, char *buf, unsigned long len) 665 { 666 unsigned long wlen; 667 668 /* room ??? */ 669 if (insert || *num == *eol_num) { 670 if (*eol_num > len - 1) { 671 getcmd_cbeep(); 672 return; 673 } 674 (*eol_num)++; 675 } 676 677 if (insert) { 678 wlen = *eol_num - *num; 679 if (wlen > 1) { 680 memmove(&buf[*num+1], &buf[*num], wlen-1); 681 } 682 683 buf[*num] = ichar; 684 putnstr(buf + *num, wlen); 685 (*num)++; 686 while (--wlen) { 687 getcmd_putch(CTL_BACKSPACE); 688 } 689 } else { 690 /* echo the character */ 691 wlen = 1; 692 buf[*num] = ichar; 693 putnstr(buf + *num, wlen); 694 (*num)++; 695 } 696 } 697 698 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 699 unsigned long *eol_num, char *buf, unsigned long len) 700 { 701 while (strsize--) { 702 cread_add_char(*str, insert, num, eol_num, buf, len); 703 str++; 704 } 705 } 706 707 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 708 { 709 unsigned long num = 0; 710 unsigned long eol_num = 0; 711 unsigned long wlen; 712 char ichar; 713 int insert = 1; 714 int esc_len = 0; 715 char esc_save[8]; 716 int init_len = strlen(buf); 717 718 if (init_len) 719 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 720 721 while (1) { 722 #ifdef CONFIG_BOOT_RETRY_TIME 723 while (!tstc()) { /* while no incoming data */ 724 if (retry_time >= 0 && get_ticks() > endtime) 725 return (-2); /* timed out */ 726 WATCHDOG_RESET(); 727 } 728 #endif 729 730 ichar = getcmd_getch(); 731 732 if ((ichar == '\n') || (ichar == '\r')) { 733 putc('\n'); 734 break; 735 } 736 737 /* 738 * handle standard linux xterm esc sequences for arrow key, etc. 739 */ 740 if (esc_len != 0) { 741 if (esc_len == 1) { 742 if (ichar == '[') { 743 esc_save[esc_len] = ichar; 744 esc_len = 2; 745 } else { 746 cread_add_str(esc_save, esc_len, insert, 747 &num, &eol_num, buf, *len); 748 esc_len = 0; 749 } 750 continue; 751 } 752 753 switch (ichar) { 754 755 case 'D': /* <- key */ 756 ichar = CTL_CH('b'); 757 esc_len = 0; 758 break; 759 case 'C': /* -> key */ 760 ichar = CTL_CH('f'); 761 esc_len = 0; 762 break; /* pass off to ^F handler */ 763 case 'H': /* Home key */ 764 ichar = CTL_CH('a'); 765 esc_len = 0; 766 break; /* pass off to ^A handler */ 767 case 'A': /* up arrow */ 768 ichar = CTL_CH('p'); 769 esc_len = 0; 770 break; /* pass off to ^P handler */ 771 case 'B': /* down arrow */ 772 ichar = CTL_CH('n'); 773 esc_len = 0; 774 break; /* pass off to ^N handler */ 775 default: 776 esc_save[esc_len++] = ichar; 777 cread_add_str(esc_save, esc_len, insert, 778 &num, &eol_num, buf, *len); 779 esc_len = 0; 780 continue; 781 } 782 } 783 784 switch (ichar) { 785 case 0x1b: 786 if (esc_len == 0) { 787 esc_save[esc_len] = ichar; 788 esc_len = 1; 789 } else { 790 puts("impossible condition #876\n"); 791 esc_len = 0; 792 } 793 break; 794 795 case CTL_CH('a'): 796 BEGINNING_OF_LINE(); 797 break; 798 case CTL_CH('c'): /* ^C - break */ 799 *buf = '\0'; /* discard input */ 800 return (-1); 801 case CTL_CH('f'): 802 if (num < eol_num) { 803 getcmd_putch(buf[num]); 804 num++; 805 } 806 break; 807 case CTL_CH('b'): 808 if (num) { 809 getcmd_putch(CTL_BACKSPACE); 810 num--; 811 } 812 break; 813 case CTL_CH('d'): 814 if (num < eol_num) { 815 wlen = eol_num - num - 1; 816 if (wlen) { 817 memmove(&buf[num], &buf[num+1], wlen); 818 putnstr(buf + num, wlen); 819 } 820 821 getcmd_putch(' '); 822 do { 823 getcmd_putch(CTL_BACKSPACE); 824 } while (wlen--); 825 eol_num--; 826 } 827 break; 828 case CTL_CH('k'): 829 ERASE_TO_EOL(); 830 break; 831 case CTL_CH('e'): 832 REFRESH_TO_EOL(); 833 break; 834 case CTL_CH('o'): 835 insert = !insert; 836 break; 837 case CTL_CH('x'): 838 case CTL_CH('u'): 839 BEGINNING_OF_LINE(); 840 ERASE_TO_EOL(); 841 break; 842 case DEL: 843 case DEL7: 844 case 8: 845 if (num) { 846 wlen = eol_num - num; 847 num--; 848 memmove(&buf[num], &buf[num+1], wlen); 849 getcmd_putch(CTL_BACKSPACE); 850 putnstr(buf + num, wlen); 851 getcmd_putch(' '); 852 do { 853 getcmd_putch(CTL_BACKSPACE); 854 } while (wlen--); 855 eol_num--; 856 } 857 break; 858 case CTL_CH('p'): 859 case CTL_CH('n'): 860 { 861 char * hline; 862 863 esc_len = 0; 864 865 if (ichar == CTL_CH('p')) 866 hline = hist_prev(); 867 else 868 hline = hist_next(); 869 870 if (!hline) { 871 getcmd_cbeep(); 872 continue; 873 } 874 875 /* nuke the current line */ 876 /* first, go home */ 877 BEGINNING_OF_LINE(); 878 879 /* erase to end of line */ 880 ERASE_TO_EOL(); 881 882 /* copy new line into place and display */ 883 strcpy(buf, hline); 884 eol_num = strlen(buf); 885 REFRESH_TO_EOL(); 886 continue; 887 } 888 #ifdef CONFIG_AUTO_COMPLETE 889 case '\t': { 890 int num2, col; 891 892 /* do not autocomplete when in the middle */ 893 if (num < eol_num) { 894 getcmd_cbeep(); 895 break; 896 } 897 898 buf[num] = '\0'; 899 col = strlen(prompt) + eol_num; 900 num2 = num; 901 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 902 col = num2 - num; 903 num += col; 904 eol_num += col; 905 } 906 break; 907 } 908 #endif 909 default: 910 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 911 break; 912 } 913 } 914 *len = eol_num; 915 buf[eol_num] = '\0'; /* lose the newline */ 916 917 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 918 cread_add_to_hist(buf); 919 hist_cur = hist_add_idx; 920 921 return 0; 922 } 923 924 #endif /* CONFIG_CMDLINE_EDITING */ 925 926 /****************************************************************************/ 927 928 /* 929 * Prompt for input and read a line. 930 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 931 * time out when time goes past endtime (timebase time in ticks). 932 * Return: number of read characters 933 * -1 if break 934 * -2 if timed out 935 */ 936 int readline (const char *const prompt) 937 { 938 /* 939 * If console_buffer isn't 0-length the user will be prompted to modify 940 * it instead of entering it from scratch as desired. 941 */ 942 console_buffer[0] = '\0'; 943 944 return readline_into_buffer(prompt, console_buffer); 945 } 946 947 948 int readline_into_buffer (const char *const prompt, char * buffer) 949 { 950 char *p = buffer; 951 #ifdef CONFIG_CMDLINE_EDITING 952 unsigned int len=MAX_CMDBUF_SIZE; 953 int rc; 954 static int initted = 0; 955 956 /* 957 * History uses a global array which is not 958 * writable until after relocation to RAM. 959 * Revert to non-history version if still 960 * running from flash. 961 */ 962 if (gd->flags & GD_FLG_RELOC) { 963 if (!initted) { 964 hist_init(); 965 initted = 1; 966 } 967 968 if (prompt) 969 puts (prompt); 970 971 rc = cread_line(prompt, p, &len); 972 return rc < 0 ? rc : len; 973 974 } else { 975 #endif /* CONFIG_CMDLINE_EDITING */ 976 char * p_buf = p; 977 int n = 0; /* buffer index */ 978 int plen = 0; /* prompt length */ 979 int col; /* output column cnt */ 980 char c; 981 982 /* print prompt */ 983 if (prompt) { 984 plen = strlen (prompt); 985 puts (prompt); 986 } 987 col = plen; 988 989 for (;;) { 990 #ifdef CONFIG_BOOT_RETRY_TIME 991 while (!tstc()) { /* while no incoming data */ 992 if (retry_time >= 0 && get_ticks() > endtime) 993 return (-2); /* timed out */ 994 WATCHDOG_RESET(); 995 } 996 #endif 997 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 998 999 #ifdef CONFIG_SHOW_ACTIVITY 1000 while (!tstc()) { 1001 extern void show_activity(int arg); 1002 show_activity(0); 1003 WATCHDOG_RESET(); 1004 } 1005 #endif 1006 c = getc(); 1007 1008 /* 1009 * Special character handling 1010 */ 1011 switch (c) { 1012 case '\r': /* Enter */ 1013 case '\n': 1014 *p = '\0'; 1015 puts ("\r\n"); 1016 return (p - p_buf); 1017 1018 case '\0': /* nul */ 1019 continue; 1020 1021 case 0x03: /* ^C - break */ 1022 p_buf[0] = '\0'; /* discard input */ 1023 return (-1); 1024 1025 case 0x15: /* ^U - erase line */ 1026 while (col > plen) { 1027 puts (erase_seq); 1028 --col; 1029 } 1030 p = p_buf; 1031 n = 0; 1032 continue; 1033 1034 case 0x17: /* ^W - erase word */ 1035 p=delete_char(p_buf, p, &col, &n, plen); 1036 while ((n > 0) && (*p != ' ')) { 1037 p=delete_char(p_buf, p, &col, &n, plen); 1038 } 1039 continue; 1040 1041 case 0x08: /* ^H - backspace */ 1042 case 0x7F: /* DEL - backspace */ 1043 p=delete_char(p_buf, p, &col, &n, plen); 1044 continue; 1045 1046 default: 1047 /* 1048 * Must be a normal character then 1049 */ 1050 if (n < CONFIG_SYS_CBSIZE-2) { 1051 if (c == '\t') { /* expand TABs */ 1052 #ifdef CONFIG_AUTO_COMPLETE 1053 /* if auto completion triggered just continue */ 1054 *p = '\0'; 1055 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1056 p = p_buf + n; /* reset */ 1057 continue; 1058 } 1059 #endif 1060 puts (tab_seq+(col&07)); 1061 col += 8 - (col&07); 1062 } else { 1063 ++col; /* echo input */ 1064 putc (c); 1065 } 1066 *p++ = c; 1067 ++n; 1068 } else { /* Buffer full */ 1069 putc ('\a'); 1070 } 1071 } 1072 } 1073 #ifdef CONFIG_CMDLINE_EDITING 1074 } 1075 #endif 1076 } 1077 1078 /****************************************************************************/ 1079 1080 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1081 { 1082 char *s; 1083 1084 if (*np == 0) { 1085 return (p); 1086 } 1087 1088 if (*(--p) == '\t') { /* will retype the whole line */ 1089 while (*colp > plen) { 1090 puts (erase_seq); 1091 (*colp)--; 1092 } 1093 for (s=buffer; s<p; ++s) { 1094 if (*s == '\t') { 1095 puts (tab_seq+((*colp) & 07)); 1096 *colp += 8 - ((*colp) & 07); 1097 } else { 1098 ++(*colp); 1099 putc (*s); 1100 } 1101 } 1102 } else { 1103 puts (erase_seq); 1104 (*colp)--; 1105 } 1106 (*np)--; 1107 return (p); 1108 } 1109 1110 /****************************************************************************/ 1111 1112 int parse_line (char *line, char *argv[]) 1113 { 1114 int nargs = 0; 1115 1116 #ifdef DEBUG_PARSER 1117 printf ("parse_line: \"%s\"\n", line); 1118 #endif 1119 while (nargs < CONFIG_SYS_MAXARGS) { 1120 1121 /* skip any white space */ 1122 while ((*line == ' ') || (*line == '\t')) { 1123 ++line; 1124 } 1125 1126 if (*line == '\0') { /* end of line, no more args */ 1127 argv[nargs] = NULL; 1128 #ifdef DEBUG_PARSER 1129 printf ("parse_line: nargs=%d\n", nargs); 1130 #endif 1131 return (nargs); 1132 } 1133 1134 argv[nargs++] = line; /* begin of argument string */ 1135 1136 /* find end of string */ 1137 while (*line && (*line != ' ') && (*line != '\t')) { 1138 ++line; 1139 } 1140 1141 if (*line == '\0') { /* end of line, no more args */ 1142 argv[nargs] = NULL; 1143 #ifdef DEBUG_PARSER 1144 printf ("parse_line: nargs=%d\n", nargs); 1145 #endif 1146 return (nargs); 1147 } 1148 1149 *line++ = '\0'; /* terminate current arg */ 1150 } 1151 1152 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1153 1154 #ifdef DEBUG_PARSER 1155 printf ("parse_line: nargs=%d\n", nargs); 1156 #endif 1157 return (nargs); 1158 } 1159 1160 /****************************************************************************/ 1161 1162 static void process_macros (const char *input, char *output) 1163 { 1164 char c, prev; 1165 const char *varname_start = NULL; 1166 int inputcnt = strlen (input); 1167 int outputcnt = CONFIG_SYS_CBSIZE; 1168 int state = 0; /* 0 = waiting for '$' */ 1169 1170 /* 1 = waiting for '(' or '{' */ 1171 /* 2 = waiting for ')' or '}' */ 1172 /* 3 = waiting for ''' */ 1173 #ifdef DEBUG_PARSER 1174 char *output_start = output; 1175 1176 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1177 input); 1178 #endif 1179 1180 prev = '\0'; /* previous character */ 1181 1182 while (inputcnt && outputcnt) { 1183 c = *input++; 1184 inputcnt--; 1185 1186 if (state != 3) { 1187 /* remove one level of escape characters */ 1188 if ((c == '\\') && (prev != '\\')) { 1189 if (inputcnt-- == 0) 1190 break; 1191 prev = c; 1192 c = *input++; 1193 } 1194 } 1195 1196 switch (state) { 1197 case 0: /* Waiting for (unescaped) $ */ 1198 if ((c == '\'') && (prev != '\\')) { 1199 state = 3; 1200 break; 1201 } 1202 if ((c == '$') && (prev != '\\')) { 1203 state++; 1204 } else { 1205 *(output++) = c; 1206 outputcnt--; 1207 } 1208 break; 1209 case 1: /* Waiting for ( */ 1210 if (c == '(' || c == '{') { 1211 state++; 1212 varname_start = input; 1213 } else { 1214 state = 0; 1215 *(output++) = '$'; 1216 outputcnt--; 1217 1218 if (outputcnt) { 1219 *(output++) = c; 1220 outputcnt--; 1221 } 1222 } 1223 break; 1224 case 2: /* Waiting for ) */ 1225 if (c == ')' || c == '}') { 1226 int i; 1227 char envname[CONFIG_SYS_CBSIZE], *envval; 1228 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1229 1230 /* Get the varname */ 1231 for (i = 0; i < envcnt; i++) { 1232 envname[i] = varname_start[i]; 1233 } 1234 envname[i] = 0; 1235 1236 /* Get its value */ 1237 envval = getenv (envname); 1238 1239 /* Copy into the line if it exists */ 1240 if (envval != NULL) 1241 while ((*envval) && outputcnt) { 1242 *(output++) = *(envval++); 1243 outputcnt--; 1244 } 1245 /* Look for another '$' */ 1246 state = 0; 1247 } 1248 break; 1249 case 3: /* Waiting for ' */ 1250 if ((c == '\'') && (prev != '\\')) { 1251 state = 0; 1252 } else { 1253 *(output++) = c; 1254 outputcnt--; 1255 } 1256 break; 1257 } 1258 prev = c; 1259 } 1260 1261 if (outputcnt) 1262 *output = 0; 1263 else 1264 *(output - 1) = 0; 1265 1266 #ifdef DEBUG_PARSER 1267 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1268 strlen (output_start), output_start); 1269 #endif 1270 } 1271 1272 /**************************************************************************** 1273 * returns: 1274 * 1 - command executed, repeatable 1275 * 0 - command executed but not repeatable, interrupted commands are 1276 * always considered not repeatable 1277 * -1 - not executed (unrecognized, bootd recursion or too many args) 1278 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1279 * considered unrecognized) 1280 * 1281 * WARNING: 1282 * 1283 * We must create a temporary copy of the command since the command we get 1284 * may be the result from getenv(), which returns a pointer directly to 1285 * the environment data, which may change magicly when the command we run 1286 * creates or modifies environment variables (like "bootp" does). 1287 */ 1288 1289 int run_command (const char *cmd, int flag) 1290 { 1291 cmd_tbl_t *cmdtp; 1292 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1293 char *token; /* start of token in cmdbuf */ 1294 char *sep; /* end of token (separator) in cmdbuf */ 1295 char finaltoken[CONFIG_SYS_CBSIZE]; 1296 char *str = cmdbuf; 1297 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1298 int argc, inquotes; 1299 int repeatable = 1; 1300 int rc = 0; 1301 1302 #ifdef DEBUG_PARSER 1303 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1304 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1305 puts ("\"\n"); 1306 #endif 1307 1308 clear_ctrlc(); /* forget any previous Control C */ 1309 1310 if (!cmd || !*cmd) { 1311 return -1; /* empty command */ 1312 } 1313 1314 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1315 puts ("## Command too long!\n"); 1316 return -1; 1317 } 1318 1319 strcpy (cmdbuf, cmd); 1320 1321 /* Process separators and check for invalid 1322 * repeatable commands 1323 */ 1324 1325 #ifdef DEBUG_PARSER 1326 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1327 #endif 1328 while (*str) { 1329 1330 /* 1331 * Find separator, or string end 1332 * Allow simple escape of ';' by writing "\;" 1333 */ 1334 for (inquotes = 0, sep = str; *sep; sep++) { 1335 if ((*sep=='\'') && 1336 (*(sep-1) != '\\')) 1337 inquotes=!inquotes; 1338 1339 if (!inquotes && 1340 (*sep == ';') && /* separator */ 1341 ( sep != str) && /* past string start */ 1342 (*(sep-1) != '\\')) /* and NOT escaped */ 1343 break; 1344 } 1345 1346 /* 1347 * Limit the token to data between separators 1348 */ 1349 token = str; 1350 if (*sep) { 1351 str = sep + 1; /* start of command for next pass */ 1352 *sep = '\0'; 1353 } 1354 else 1355 str = sep; /* no more commands for next pass */ 1356 #ifdef DEBUG_PARSER 1357 printf ("token: \"%s\"\n", token); 1358 #endif 1359 1360 /* find macros in this token and replace them */ 1361 process_macros (token, finaltoken); 1362 1363 /* Extract arguments */ 1364 if ((argc = parse_line (finaltoken, argv)) == 0) { 1365 rc = -1; /* no command at all */ 1366 continue; 1367 } 1368 1369 /* Look up command in command table */ 1370 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1371 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1372 rc = -1; /* give up after bad command */ 1373 continue; 1374 } 1375 1376 /* found - check max args */ 1377 if (argc > cmdtp->maxargs) { 1378 cmd_usage(cmdtp); 1379 rc = -1; 1380 continue; 1381 } 1382 1383 #if defined(CONFIG_CMD_BOOTD) 1384 /* avoid "bootd" recursion */ 1385 if (cmdtp->cmd == do_bootd) { 1386 #ifdef DEBUG_PARSER 1387 printf ("[%s]\n", finaltoken); 1388 #endif 1389 if (flag & CMD_FLAG_BOOTD) { 1390 puts ("'bootd' recursion detected\n"); 1391 rc = -1; 1392 continue; 1393 } else { 1394 flag |= CMD_FLAG_BOOTD; 1395 } 1396 } 1397 #endif 1398 1399 /* OK - call function to do the command */ 1400 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1401 rc = -1; 1402 } 1403 1404 repeatable &= cmdtp->repeatable; 1405 1406 /* Did the user stop this? */ 1407 if (had_ctrlc ()) 1408 return -1; /* if stopped then not repeatable */ 1409 } 1410 1411 return rc ? rc : repeatable; 1412 } 1413 1414 /****************************************************************************/ 1415 1416 #if defined(CONFIG_CMD_RUN) 1417 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1418 { 1419 int i; 1420 1421 if (argc < 2) { 1422 cmd_usage(cmdtp); 1423 return 1; 1424 } 1425 1426 for (i=1; i<argc; ++i) { 1427 char *arg; 1428 1429 if ((arg = getenv (argv[i])) == NULL) { 1430 printf ("## Error: \"%s\" not defined\n", argv[i]); 1431 return 1; 1432 } 1433 #ifndef CONFIG_SYS_HUSH_PARSER 1434 if (run_command (arg, flag) == -1) 1435 return 1; 1436 #else 1437 if (parse_string_outer(arg, 1438 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1439 return 1; 1440 #endif 1441 } 1442 return 0; 1443 } 1444 #endif 1445