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 CFG_HUSH_PARSER 38 #include <hush.h> 39 #endif 40 41 #include <post.h> 42 43 #ifdef CONFIG_SILENT_CONSOLE 44 DECLARE_GLOBAL_DATA_PTR; 45 #endif 46 47 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY) 48 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */ 49 #endif 50 51 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); 52 53 54 #define MAX_DELAY_STOP_STR 32 55 56 static int parse_line (char *, char *[]); 57 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 58 static int abortboot(int); 59 #endif 60 61 #undef DEBUG_PARSER 62 63 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */ 64 65 #ifndef CONFIG_CMDLINE_EDITING 66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 67 static char erase_seq[] = "\b \b"; /* erase sequence */ 68 static char tab_seq[] = " "; /* used to expand TABs */ 69 #endif /* CONFIG_CMDLINE_EDITING */ 70 71 #ifdef CONFIG_BOOT_RETRY_TIME 72 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 73 static int retry_time = -1; /* -1 so can call readline before main_loop */ 74 #endif 75 76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 77 78 #ifndef CONFIG_BOOT_RETRY_MIN 79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 80 #endif 81 82 #ifdef CONFIG_MODEM_SUPPORT 83 int do_mdm_init = 0; 84 extern void mdm_init(void); /* defined in board.c */ 85 #endif 86 87 /*************************************************************************** 88 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 89 * returns: 0 - no key string, allow autoboot 90 * 1 - got key string, abort 91 */ 92 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 93 # if defined(CONFIG_AUTOBOOT_KEYED) 94 static __inline__ int abortboot(int bootdelay) 95 { 96 int abort = 0; 97 uint64_t etime = endtick(bootdelay); 98 struct 99 { 100 char* str; 101 u_int len; 102 int retry; 103 } 104 delaykey [] = 105 { 106 { str: getenv ("bootdelaykey"), retry: 1 }, 107 { str: getenv ("bootdelaykey2"), retry: 1 }, 108 { str: getenv ("bootstopkey"), retry: 0 }, 109 { str: getenv ("bootstopkey2"), retry: 0 }, 110 }; 111 112 char presskey [MAX_DELAY_STOP_STR]; 113 u_int presskey_len = 0; 114 u_int presskey_max = 0; 115 u_int i; 116 117 #ifdef CONFIG_SILENT_CONSOLE 118 if (gd->flags & GD_FLG_SILENT) { 119 /* Restore serial console */ 120 console_assign (stdout, "serial"); 121 console_assign (stderr, "serial"); 122 } 123 #endif 124 125 # ifdef CONFIG_AUTOBOOT_PROMPT 126 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay); 127 # endif 128 129 # ifdef CONFIG_AUTOBOOT_DELAY_STR 130 if (delaykey[0].str == NULL) 131 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 132 # endif 133 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 134 if (delaykey[1].str == NULL) 135 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 136 # endif 137 # ifdef CONFIG_AUTOBOOT_STOP_STR 138 if (delaykey[2].str == NULL) 139 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 140 # endif 141 # ifdef CONFIG_AUTOBOOT_STOP_STR2 142 if (delaykey[3].str == NULL) 143 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 144 # endif 145 146 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 147 delaykey[i].len = delaykey[i].str == NULL ? 148 0 : strlen (delaykey[i].str); 149 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 150 MAX_DELAY_STOP_STR : delaykey[i].len; 151 152 presskey_max = presskey_max > delaykey[i].len ? 153 presskey_max : delaykey[i].len; 154 155 # if DEBUG_BOOTKEYS 156 printf("%s key:<%s>\n", 157 delaykey[i].retry ? "delay" : "stop", 158 delaykey[i].str ? delaykey[i].str : "NULL"); 159 # endif 160 } 161 162 /* In order to keep up with incoming data, check timeout only 163 * when catch up. 164 */ 165 while (!abort && get_ticks() <= etime) { 166 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 167 if (delaykey[i].len > 0 && 168 presskey_len >= delaykey[i].len && 169 memcmp (presskey + presskey_len - delaykey[i].len, 170 delaykey[i].str, 171 delaykey[i].len) == 0) { 172 # if DEBUG_BOOTKEYS 173 printf("got %skey\n", 174 delaykey[i].retry ? "delay" : "stop"); 175 # endif 176 177 # ifdef CONFIG_BOOT_RETRY_TIME 178 /* don't retry auto boot */ 179 if (! delaykey[i].retry) 180 retry_time = -1; 181 # endif 182 abort = 1; 183 } 184 } 185 186 if (tstc()) { 187 if (presskey_len < presskey_max) { 188 presskey [presskey_len ++] = getc(); 189 } 190 else { 191 for (i = 0; i < presskey_max - 1; i ++) 192 presskey [i] = presskey [i + 1]; 193 194 presskey [i] = getc(); 195 } 196 } 197 } 198 # if DEBUG_BOOTKEYS 199 if (!abort) 200 puts ("key timeout\n"); 201 # endif 202 203 #ifdef CONFIG_SILENT_CONSOLE 204 if (abort) { 205 /* permanently enable normal console output */ 206 gd->flags &= ~(GD_FLG_SILENT); 207 } else if (gd->flags & GD_FLG_SILENT) { 208 /* Restore silent console */ 209 console_assign (stdout, "nulldev"); 210 console_assign (stderr, "nulldev"); 211 } 212 #endif 213 214 return abort; 215 } 216 217 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 218 219 #ifdef CONFIG_MENUKEY 220 static int menukey = 0; 221 #endif 222 223 static __inline__ int abortboot(int bootdelay) 224 { 225 int abort = 0; 226 227 #ifdef CONFIG_SILENT_CONSOLE 228 if (gd->flags & GD_FLG_SILENT) { 229 /* Restore serial console */ 230 console_assign (stdout, "serial"); 231 console_assign (stderr, "serial"); 232 } 233 #endif 234 235 #ifdef CONFIG_MENUPROMPT 236 printf(CONFIG_MENUPROMPT, bootdelay); 237 #else 238 printf("Hit any key to stop autoboot: %2d ", bootdelay); 239 #endif 240 241 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 242 /* 243 * Check if key already pressed 244 * Don't check if bootdelay < 0 245 */ 246 if (bootdelay >= 0) { 247 if (tstc()) { /* we got a key press */ 248 (void) getc(); /* consume input */ 249 puts ("\b\b\b 0"); 250 abort = 1; /* don't auto boot */ 251 } 252 } 253 #endif 254 255 while ((bootdelay > 0) && (!abort)) { 256 int i; 257 258 --bootdelay; 259 /* delay 100 * 10ms */ 260 for (i=0; !abort && i<100; ++i) { 261 if (tstc()) { /* we got a key press */ 262 abort = 1; /* don't auto boot */ 263 bootdelay = 0; /* no more delay */ 264 # ifdef CONFIG_MENUKEY 265 menukey = getc(); 266 # else 267 (void) getc(); /* consume input */ 268 # endif 269 break; 270 } 271 udelay (10000); 272 } 273 274 printf ("\b\b\b%2d ", bootdelay); 275 } 276 277 putc ('\n'); 278 279 #ifdef CONFIG_SILENT_CONSOLE 280 if (abort) { 281 /* permanently enable normal console output */ 282 gd->flags &= ~(GD_FLG_SILENT); 283 } else if (gd->flags & GD_FLG_SILENT) { 284 /* Restore silent console */ 285 console_assign (stdout, "nulldev"); 286 console_assign (stderr, "nulldev"); 287 } 288 #endif 289 290 return abort; 291 } 292 # endif /* CONFIG_AUTOBOOT_KEYED */ 293 #endif /* CONFIG_BOOTDELAY >= 0 */ 294 295 /****************************************************************************/ 296 297 void main_loop (void) 298 { 299 #ifndef CFG_HUSH_PARSER 300 static char lastcommand[CFG_CBSIZE] = { 0, }; 301 int len; 302 int rc = 1; 303 int flag; 304 #endif 305 306 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 307 char *s; 308 int bootdelay; 309 #endif 310 #ifdef CONFIG_PREBOOT 311 char *p; 312 #endif 313 #ifdef CONFIG_BOOTCOUNT_LIMIT 314 unsigned long bootcount = 0; 315 unsigned long bootlimit = 0; 316 char *bcs; 317 char bcs_set[16]; 318 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 319 320 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO) 321 ulong bmp = 0; /* default bitmap */ 322 extern int trab_vfd (ulong bitmap); 323 324 #ifdef CONFIG_MODEM_SUPPORT 325 if (do_mdm_init) 326 bmp = 1; /* alternate bitmap */ 327 #endif 328 trab_vfd (bmp); 329 #endif /* CONFIG_VFD && VFD_TEST_LOGO */ 330 331 #ifdef CONFIG_BOOTCOUNT_LIMIT 332 bootcount = bootcount_load(); 333 bootcount++; 334 bootcount_store (bootcount); 335 sprintf (bcs_set, "%lu", bootcount); 336 setenv ("bootcount", bcs_set); 337 bcs = getenv ("bootlimit"); 338 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 339 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 340 341 #ifdef CONFIG_MODEM_SUPPORT 342 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 343 if (do_mdm_init) { 344 char *str = strdup(getenv("mdm_cmd")); 345 setenv ("preboot", str); /* set or delete definition */ 346 if (str != NULL) 347 free (str); 348 mdm_init(); /* wait for modem connection */ 349 } 350 #endif /* CONFIG_MODEM_SUPPORT */ 351 352 #ifdef CONFIG_VERSION_VARIABLE 353 { 354 extern char version_string[]; 355 356 setenv ("ver", version_string); /* set version variable */ 357 } 358 #endif /* CONFIG_VERSION_VARIABLE */ 359 360 #ifdef CFG_HUSH_PARSER 361 u_boot_hush_start (); 362 #endif 363 364 #ifdef CONFIG_AUTO_COMPLETE 365 install_auto_complete(); 366 #endif 367 368 #ifdef CONFIG_PREBOOT 369 if ((p = getenv ("preboot")) != NULL) { 370 # ifdef CONFIG_AUTOBOOT_KEYED 371 int prev = disable_ctrlc(1); /* disable Control C checking */ 372 # endif 373 374 # ifndef CFG_HUSH_PARSER 375 run_command (p, 0); 376 # else 377 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 378 FLAG_EXIT_FROM_LOOP); 379 # endif 380 381 # ifdef CONFIG_AUTOBOOT_KEYED 382 disable_ctrlc(prev); /* restore Control C checking */ 383 # endif 384 } 385 #endif /* CONFIG_PREBOOT */ 386 387 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 388 s = getenv ("bootdelay"); 389 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 390 391 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 392 393 # ifdef CONFIG_BOOT_RETRY_TIME 394 init_cmd_timeout (); 395 # endif /* CONFIG_BOOT_RETRY_TIME */ 396 397 #ifdef CONFIG_BOOTCOUNT_LIMIT 398 if (bootlimit && (bootcount > bootlimit)) { 399 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 400 (unsigned)bootlimit); 401 s = getenv ("altbootcmd"); 402 } 403 else 404 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 405 s = getenv ("bootcmd"); 406 407 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 408 409 if (bootdelay >= 0 && s && !abortboot (bootdelay)) { 410 # ifdef CONFIG_AUTOBOOT_KEYED 411 int prev = disable_ctrlc(1); /* disable Control C checking */ 412 # endif 413 414 # ifndef CFG_HUSH_PARSER 415 run_command (s, 0); 416 # else 417 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 418 FLAG_EXIT_FROM_LOOP); 419 # endif 420 421 # ifdef CONFIG_AUTOBOOT_KEYED 422 disable_ctrlc(prev); /* restore Control C checking */ 423 # endif 424 } 425 426 # ifdef CONFIG_MENUKEY 427 if (menukey == CONFIG_MENUKEY) { 428 s = getenv("menucmd"); 429 if (s) { 430 # ifndef CFG_HUSH_PARSER 431 run_command (s, 0); 432 # else 433 parse_string_outer(s, FLAG_PARSE_SEMICOLON | 434 FLAG_EXIT_FROM_LOOP); 435 # endif 436 } 437 } 438 #endif /* CONFIG_MENUKEY */ 439 #endif /* CONFIG_BOOTDELAY */ 440 441 #ifdef CONFIG_AMIGAONEG3SE 442 { 443 extern void video_banner(void); 444 video_banner(); 445 } 446 #endif 447 448 /* 449 * Main Loop for Monitor Command Processing 450 */ 451 #ifdef CFG_HUSH_PARSER 452 parse_file_outer(); 453 /* This point is never reached */ 454 for (;;); 455 #else 456 for (;;) { 457 #ifdef CONFIG_BOOT_RETRY_TIME 458 if (rc >= 0) { 459 /* Saw enough of a valid command to 460 * restart the timeout. 461 */ 462 reset_cmd_timeout(); 463 } 464 #endif 465 len = readline (CFG_PROMPT); 466 467 flag = 0; /* assume no special flags for now */ 468 if (len > 0) 469 strcpy (lastcommand, console_buffer); 470 else if (len == 0) 471 flag |= CMD_FLAG_REPEAT; 472 #ifdef CONFIG_BOOT_RETRY_TIME 473 else if (len == -2) { 474 /* -2 means timed out, retry autoboot 475 */ 476 puts ("\nTimed out waiting for command\n"); 477 # ifdef CONFIG_RESET_TO_RETRY 478 /* Reinit board to run initialization code again */ 479 do_reset (NULL, 0, 0, NULL); 480 # else 481 return; /* retry autoboot */ 482 # endif 483 } 484 #endif 485 486 if (len == -1) 487 puts ("<INTERRUPT>\n"); 488 else 489 rc = run_command (lastcommand, flag); 490 491 if (rc <= 0) { 492 /* invalid command or not repeatable, forget it */ 493 lastcommand[0] = 0; 494 } 495 } 496 #endif /*CFG_HUSH_PARSER*/ 497 } 498 499 #ifdef CONFIG_BOOT_RETRY_TIME 500 /*************************************************************************** 501 * initialise command line timeout 502 */ 503 void init_cmd_timeout(void) 504 { 505 char *s = getenv ("bootretry"); 506 507 if (s != NULL) 508 retry_time = (int)simple_strtol(s, NULL, 10); 509 else 510 retry_time = CONFIG_BOOT_RETRY_TIME; 511 512 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 513 retry_time = CONFIG_BOOT_RETRY_MIN; 514 } 515 516 /*************************************************************************** 517 * reset command line timeout to retry_time seconds 518 */ 519 void reset_cmd_timeout(void) 520 { 521 endtime = endtick(retry_time); 522 } 523 #endif 524 525 #ifdef CONFIG_CMDLINE_EDITING 526 527 /* 528 * cmdline-editing related codes from vivi. 529 * Author: Janghoon Lyu <nandy@mizi.com> 530 */ 531 532 #if 1 /* avoid redundand code -- wd */ 533 #define putnstr(str,n) do { \ 534 printf ("%.*s", n, str); \ 535 } while (0) 536 #else 537 void putnstr(const char *str, size_t n) 538 { 539 if (str == NULL) 540 return; 541 542 while (n && *str != '\0') { 543 putc(*str); 544 str++; 545 n--; 546 } 547 } 548 #endif 549 550 #define CTL_CH(c) ((c) - 'a' + 1) 551 552 #define MAX_CMDBUF_SIZE 256 553 554 #define CTL_BACKSPACE ('\b') 555 #define DEL ((char)255) 556 #define DEL7 ((char)127) 557 #define CREAD_HIST_CHAR ('!') 558 559 #define getcmd_putch(ch) putc(ch) 560 #define getcmd_getch() getc() 561 #define getcmd_cbeep() getcmd_putch('\a') 562 563 #define HIST_MAX 20 564 #define HIST_SIZE MAX_CMDBUF_SIZE 565 566 static int hist_max = 0; 567 static int hist_add_idx = 0; 568 static int hist_cur = -1; 569 unsigned hist_num = 0; 570 571 char* hist_list[HIST_MAX]; 572 char hist_lines[HIST_MAX][HIST_SIZE]; 573 574 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 575 576 static void hist_init(void) 577 { 578 int i; 579 580 hist_max = 0; 581 hist_add_idx = 0; 582 hist_cur = -1; 583 hist_num = 0; 584 585 for (i = 0; i < HIST_MAX; i++) { 586 hist_list[i] = hist_lines[i]; 587 hist_list[i][0] = '\0'; 588 } 589 } 590 591 static void cread_add_to_hist(char *line) 592 { 593 strcpy(hist_list[hist_add_idx], line); 594 595 if (++hist_add_idx >= HIST_MAX) 596 hist_add_idx = 0; 597 598 if (hist_add_idx > hist_max) 599 hist_max = hist_add_idx; 600 601 hist_num++; 602 } 603 604 static char* hist_prev(void) 605 { 606 char *ret; 607 int old_cur; 608 609 if (hist_cur < 0) 610 return NULL; 611 612 old_cur = hist_cur; 613 if (--hist_cur < 0) 614 hist_cur = hist_max; 615 616 if (hist_cur == hist_add_idx) { 617 hist_cur = old_cur; 618 ret = NULL; 619 } else 620 ret = hist_list[hist_cur]; 621 622 return (ret); 623 } 624 625 static char* hist_next(void) 626 { 627 char *ret; 628 629 if (hist_cur < 0) 630 return NULL; 631 632 if (hist_cur == hist_add_idx) 633 return NULL; 634 635 if (++hist_cur > hist_max) 636 hist_cur = 0; 637 638 if (hist_cur == hist_add_idx) { 639 ret = ""; 640 } else 641 ret = hist_list[hist_cur]; 642 643 return (ret); 644 } 645 646 #ifndef CONFIG_CMDLINE_EDITING 647 static void cread_print_hist_list(void) 648 { 649 int i; 650 unsigned long n; 651 652 n = hist_num - hist_max; 653 654 i = hist_add_idx + 1; 655 while (1) { 656 if (i > hist_max) 657 i = 0; 658 if (i == hist_add_idx) 659 break; 660 printf("%s\n", hist_list[i]); 661 n++; 662 i++; 663 } 664 } 665 #endif /* CONFIG_CMDLINE_EDITING */ 666 667 #define BEGINNING_OF_LINE() { \ 668 while (num) { \ 669 getcmd_putch(CTL_BACKSPACE); \ 670 num--; \ 671 } \ 672 } 673 674 #define ERASE_TO_EOL() { \ 675 if (num < eol_num) { \ 676 int tmp; \ 677 for (tmp = num; tmp < eol_num; tmp++) \ 678 getcmd_putch(' '); \ 679 while (tmp-- > num) \ 680 getcmd_putch(CTL_BACKSPACE); \ 681 eol_num = num; \ 682 } \ 683 } 684 685 #define REFRESH_TO_EOL() { \ 686 if (num < eol_num) { \ 687 wlen = eol_num - num; \ 688 putnstr(buf + num, wlen); \ 689 num = eol_num; \ 690 } \ 691 } 692 693 static void cread_add_char(char ichar, int insert, unsigned long *num, 694 unsigned long *eol_num, char *buf, unsigned long len) 695 { 696 unsigned long wlen; 697 698 /* room ??? */ 699 if (insert || *num == *eol_num) { 700 if (*eol_num > len - 1) { 701 getcmd_cbeep(); 702 return; 703 } 704 (*eol_num)++; 705 } 706 707 if (insert) { 708 wlen = *eol_num - *num; 709 if (wlen > 1) { 710 memmove(&buf[*num+1], &buf[*num], wlen-1); 711 } 712 713 buf[*num] = ichar; 714 putnstr(buf + *num, wlen); 715 (*num)++; 716 while (--wlen) { 717 getcmd_putch(CTL_BACKSPACE); 718 } 719 } else { 720 /* echo the character */ 721 wlen = 1; 722 buf[*num] = ichar; 723 putnstr(buf + *num, wlen); 724 (*num)++; 725 } 726 } 727 728 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 729 unsigned long *eol_num, char *buf, unsigned long len) 730 { 731 while (strsize--) { 732 cread_add_char(*str, insert, num, eol_num, buf, len); 733 str++; 734 } 735 } 736 737 static int cread_line(char *buf, unsigned int *len) 738 { 739 unsigned long num = 0; 740 unsigned long eol_num = 0; 741 unsigned long rlen; 742 unsigned long wlen; 743 char ichar; 744 int insert = 1; 745 int esc_len = 0; 746 int rc = 0; 747 char esc_save[8]; 748 749 while (1) { 750 rlen = 1; 751 ichar = getcmd_getch(); 752 753 if ((ichar == '\n') || (ichar == '\r')) { 754 putc('\n'); 755 break; 756 } 757 758 /* 759 * handle standard linux xterm esc sequences for arrow key, etc. 760 */ 761 if (esc_len != 0) { 762 if (esc_len == 1) { 763 if (ichar == '[') { 764 esc_save[esc_len] = ichar; 765 esc_len = 2; 766 } else { 767 cread_add_str(esc_save, esc_len, insert, 768 &num, &eol_num, buf, *len); 769 esc_len = 0; 770 } 771 continue; 772 } 773 774 switch (ichar) { 775 776 case 'D': /* <- key */ 777 ichar = CTL_CH('b'); 778 esc_len = 0; 779 break; 780 case 'C': /* -> key */ 781 ichar = CTL_CH('f'); 782 esc_len = 0; 783 break; /* pass off to ^F handler */ 784 case 'H': /* Home key */ 785 ichar = CTL_CH('a'); 786 esc_len = 0; 787 break; /* pass off to ^A handler */ 788 case 'A': /* up arrow */ 789 ichar = CTL_CH('p'); 790 esc_len = 0; 791 break; /* pass off to ^P handler */ 792 case 'B': /* down arrow */ 793 ichar = CTL_CH('n'); 794 esc_len = 0; 795 break; /* pass off to ^N handler */ 796 default: 797 esc_save[esc_len++] = ichar; 798 cread_add_str(esc_save, esc_len, insert, 799 &num, &eol_num, buf, *len); 800 esc_len = 0; 801 continue; 802 } 803 } 804 805 switch (ichar) { 806 case 0x1b: 807 if (esc_len == 0) { 808 esc_save[esc_len] = ichar; 809 esc_len = 1; 810 } else { 811 puts("impossible condition #876\n"); 812 esc_len = 0; 813 } 814 break; 815 816 case CTL_CH('a'): 817 BEGINNING_OF_LINE(); 818 break; 819 case CTL_CH('c'): /* ^C - break */ 820 *buf = '\0'; /* discard input */ 821 return (-1); 822 case CTL_CH('f'): 823 if (num < eol_num) { 824 getcmd_putch(buf[num]); 825 num++; 826 } 827 break; 828 case CTL_CH('b'): 829 if (num) { 830 getcmd_putch(CTL_BACKSPACE); 831 num--; 832 } 833 break; 834 case CTL_CH('d'): 835 if (num < eol_num) { 836 wlen = eol_num - num - 1; 837 if (wlen) { 838 memmove(&buf[num], &buf[num+1], wlen); 839 putnstr(buf + num, wlen); 840 } 841 842 getcmd_putch(' '); 843 do { 844 getcmd_putch(CTL_BACKSPACE); 845 } while (wlen--); 846 eol_num--; 847 } 848 break; 849 case CTL_CH('k'): 850 ERASE_TO_EOL(); 851 break; 852 case CTL_CH('e'): 853 REFRESH_TO_EOL(); 854 break; 855 case CTL_CH('o'): 856 insert = !insert; 857 break; 858 case CTL_CH('x'): 859 BEGINNING_OF_LINE(); 860 ERASE_TO_EOL(); 861 break; 862 case DEL: 863 case DEL7: 864 case 8: 865 if (num) { 866 wlen = eol_num - num; 867 num--; 868 memmove(&buf[num], &buf[num+1], wlen); 869 getcmd_putch(CTL_BACKSPACE); 870 putnstr(buf + num, wlen); 871 getcmd_putch(' '); 872 do { 873 getcmd_putch(CTL_BACKSPACE); 874 } while (wlen--); 875 eol_num--; 876 } 877 break; 878 case CTL_CH('p'): 879 case CTL_CH('n'): 880 { 881 char * hline; 882 883 esc_len = 0; 884 885 if (ichar == CTL_CH('p')) 886 hline = hist_prev(); 887 else 888 hline = hist_next(); 889 890 if (!hline) { 891 getcmd_cbeep(); 892 continue; 893 } 894 895 /* nuke the current line */ 896 /* first, go home */ 897 BEGINNING_OF_LINE(); 898 899 /* erase to end of line */ 900 ERASE_TO_EOL(); 901 902 /* copy new line into place and display */ 903 strcpy(buf, hline); 904 eol_num = strlen(buf); 905 REFRESH_TO_EOL(); 906 continue; 907 } 908 default: 909 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 910 break; 911 } 912 } 913 *len = eol_num; 914 buf[eol_num] = '\0'; /* lose the newline */ 915 916 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 917 cread_add_to_hist(buf); 918 hist_cur = hist_add_idx; 919 920 return (rc); 921 } 922 923 #endif /* CONFIG_CMDLINE_EDITING */ 924 925 /****************************************************************************/ 926 927 /* 928 * Prompt for input and read a line. 929 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 930 * time out when time goes past endtime (timebase time in ticks). 931 * Return: number of read characters 932 * -1 if break 933 * -2 if timed out 934 */ 935 int readline (const char *const prompt) 936 { 937 #ifdef CONFIG_CMDLINE_EDITING 938 char *p = console_buffer; 939 unsigned int len=MAX_CMDBUF_SIZE; 940 static int initted = 0; 941 942 if (!initted) { 943 hist_init(); 944 initted = 1; 945 } 946 947 puts (prompt); 948 949 cread_line(p, &len); 950 return len; 951 #else 952 char *p = console_buffer; 953 int n = 0; /* buffer index */ 954 int plen = 0; /* prompt length */ 955 int col; /* output column cnt */ 956 char c; 957 958 /* print prompt */ 959 if (prompt) { 960 plen = strlen (prompt); 961 puts (prompt); 962 } 963 col = plen; 964 965 for (;;) { 966 #ifdef CONFIG_BOOT_RETRY_TIME 967 while (!tstc()) { /* while no incoming data */ 968 if (retry_time >= 0 && get_ticks() > endtime) 969 return (-2); /* timed out */ 970 } 971 #endif 972 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 973 974 #ifdef CONFIG_SHOW_ACTIVITY 975 while (!tstc()) { 976 extern void show_activity(int arg); 977 show_activity(0); 978 } 979 #endif 980 c = getc(); 981 982 /* 983 * Special character handling 984 */ 985 switch (c) { 986 case '\r': /* Enter */ 987 case '\n': 988 *p = '\0'; 989 puts ("\r\n"); 990 return (p - console_buffer); 991 992 case '\0': /* nul */ 993 continue; 994 995 case 0x03: /* ^C - break */ 996 console_buffer[0] = '\0'; /* discard input */ 997 return (-1); 998 999 case 0x15: /* ^U - erase line */ 1000 while (col > plen) { 1001 puts (erase_seq); 1002 --col; 1003 } 1004 p = console_buffer; 1005 n = 0; 1006 continue; 1007 1008 case 0x17: /* ^W - erase word */ 1009 p=delete_char(console_buffer, p, &col, &n, plen); 1010 while ((n > 0) && (*p != ' ')) { 1011 p=delete_char(console_buffer, p, &col, &n, plen); 1012 } 1013 continue; 1014 1015 case 0x08: /* ^H - backspace */ 1016 case 0x7F: /* DEL - backspace */ 1017 p=delete_char(console_buffer, p, &col, &n, plen); 1018 continue; 1019 1020 default: 1021 /* 1022 * Must be a normal character then 1023 */ 1024 if (n < CFG_CBSIZE-2) { 1025 if (c == '\t') { /* expand TABs */ 1026 #ifdef CONFIG_AUTO_COMPLETE 1027 /* if auto completion triggered just continue */ 1028 *p = '\0'; 1029 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1030 p = console_buffer + n; /* reset */ 1031 continue; 1032 } 1033 #endif 1034 puts (tab_seq+(col&07)); 1035 col += 8 - (col&07); 1036 } else { 1037 ++col; /* echo input */ 1038 putc (c); 1039 } 1040 *p++ = c; 1041 ++n; 1042 } else { /* Buffer full */ 1043 putc ('\a'); 1044 } 1045 } 1046 } 1047 #endif /* CONFIG_CMDLINE_EDITING */ 1048 } 1049 1050 /****************************************************************************/ 1051 1052 #ifndef CONFIG_CMDLINE_EDITING 1053 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1054 { 1055 char *s; 1056 1057 if (*np == 0) { 1058 return (p); 1059 } 1060 1061 if (*(--p) == '\t') { /* will retype the whole line */ 1062 while (*colp > plen) { 1063 puts (erase_seq); 1064 (*colp)--; 1065 } 1066 for (s=buffer; s<p; ++s) { 1067 if (*s == '\t') { 1068 puts (tab_seq+((*colp) & 07)); 1069 *colp += 8 - ((*colp) & 07); 1070 } else { 1071 ++(*colp); 1072 putc (*s); 1073 } 1074 } 1075 } else { 1076 puts (erase_seq); 1077 (*colp)--; 1078 } 1079 (*np)--; 1080 return (p); 1081 } 1082 #endif /* CONFIG_CMDLINE_EDITING */ 1083 1084 /****************************************************************************/ 1085 1086 int parse_line (char *line, char *argv[]) 1087 { 1088 int nargs = 0; 1089 1090 #ifdef DEBUG_PARSER 1091 printf ("parse_line: \"%s\"\n", line); 1092 #endif 1093 while (nargs < CFG_MAXARGS) { 1094 1095 /* skip any white space */ 1096 while ((*line == ' ') || (*line == '\t')) { 1097 ++line; 1098 } 1099 1100 if (*line == '\0') { /* end of line, no more args */ 1101 argv[nargs] = NULL; 1102 #ifdef DEBUG_PARSER 1103 printf ("parse_line: nargs=%d\n", nargs); 1104 #endif 1105 return (nargs); 1106 } 1107 1108 argv[nargs++] = line; /* begin of argument string */ 1109 1110 /* find end of string */ 1111 while (*line && (*line != ' ') && (*line != '\t')) { 1112 ++line; 1113 } 1114 1115 if (*line == '\0') { /* end of line, no more args */ 1116 argv[nargs] = NULL; 1117 #ifdef DEBUG_PARSER 1118 printf ("parse_line: nargs=%d\n", nargs); 1119 #endif 1120 return (nargs); 1121 } 1122 1123 *line++ = '\0'; /* terminate current arg */ 1124 } 1125 1126 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS); 1127 1128 #ifdef DEBUG_PARSER 1129 printf ("parse_line: nargs=%d\n", nargs); 1130 #endif 1131 return (nargs); 1132 } 1133 1134 /****************************************************************************/ 1135 1136 static void process_macros (const char *input, char *output) 1137 { 1138 char c, prev; 1139 const char *varname_start = NULL; 1140 int inputcnt = strlen (input); 1141 int outputcnt = CFG_CBSIZE; 1142 int state = 0; /* 0 = waiting for '$' */ 1143 /* 1 = waiting for '(' or '{' */ 1144 /* 2 = waiting for ')' or '}' */ 1145 /* 3 = waiting for ''' */ 1146 #ifdef DEBUG_PARSER 1147 char *output_start = output; 1148 1149 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input); 1150 #endif 1151 1152 prev = '\0'; /* previous character */ 1153 1154 while (inputcnt && outputcnt) { 1155 c = *input++; 1156 inputcnt--; 1157 1158 if (state!=3) { 1159 /* remove one level of escape characters */ 1160 if ((c == '\\') && (prev != '\\')) { 1161 if (inputcnt-- == 0) 1162 break; 1163 prev = c; 1164 c = *input++; 1165 } 1166 } 1167 1168 switch (state) { 1169 case 0: /* Waiting for (unescaped) $ */ 1170 if ((c == '\'') && (prev != '\\')) { 1171 state = 3; 1172 break; 1173 } 1174 if ((c == '$') && (prev != '\\')) { 1175 state++; 1176 } else { 1177 *(output++) = c; 1178 outputcnt--; 1179 } 1180 break; 1181 case 1: /* Waiting for ( */ 1182 if (c == '(' || c == '{') { 1183 state++; 1184 varname_start = input; 1185 } else { 1186 state = 0; 1187 *(output++) = '$'; 1188 outputcnt--; 1189 1190 if (outputcnt) { 1191 *(output++) = c; 1192 outputcnt--; 1193 } 1194 } 1195 break; 1196 case 2: /* Waiting for ) */ 1197 if (c == ')' || c == '}') { 1198 int i; 1199 char envname[CFG_CBSIZE], *envval; 1200 int envcnt = input-varname_start-1; /* Varname # of chars */ 1201 1202 /* Get the varname */ 1203 for (i = 0; i < envcnt; i++) { 1204 envname[i] = varname_start[i]; 1205 } 1206 envname[i] = 0; 1207 1208 /* Get its value */ 1209 envval = getenv (envname); 1210 1211 /* Copy into the line if it exists */ 1212 if (envval != NULL) 1213 while ((*envval) && outputcnt) { 1214 *(output++) = *(envval++); 1215 outputcnt--; 1216 } 1217 /* Look for another '$' */ 1218 state = 0; 1219 } 1220 break; 1221 case 3: /* Waiting for ' */ 1222 if ((c == '\'') && (prev != '\\')) { 1223 state = 0; 1224 } else { 1225 *(output++) = c; 1226 outputcnt--; 1227 } 1228 break; 1229 } 1230 prev = c; 1231 } 1232 1233 if (outputcnt) 1234 *output = 0; 1235 1236 #ifdef DEBUG_PARSER 1237 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1238 strlen(output_start), output_start); 1239 #endif 1240 } 1241 1242 /**************************************************************************** 1243 * returns: 1244 * 1 - command executed, repeatable 1245 * 0 - command executed but not repeatable, interrupted commands are 1246 * always considered not repeatable 1247 * -1 - not executed (unrecognized, bootd recursion or too many args) 1248 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is 1249 * considered unrecognized) 1250 * 1251 * WARNING: 1252 * 1253 * We must create a temporary copy of the command since the command we get 1254 * may be the result from getenv(), which returns a pointer directly to 1255 * the environment data, which may change magicly when the command we run 1256 * creates or modifies environment variables (like "bootp" does). 1257 */ 1258 1259 int run_command (const char *cmd, int flag) 1260 { 1261 cmd_tbl_t *cmdtp; 1262 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */ 1263 char *token; /* start of token in cmdbuf */ 1264 char *sep; /* end of token (separator) in cmdbuf */ 1265 char finaltoken[CFG_CBSIZE]; 1266 char *str = cmdbuf; 1267 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 1268 int argc, inquotes; 1269 int repeatable = 1; 1270 int rc = 0; 1271 1272 #ifdef DEBUG_PARSER 1273 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1274 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1275 puts ("\"\n"); 1276 #endif 1277 1278 clear_ctrlc(); /* forget any previous Control C */ 1279 1280 if (!cmd || !*cmd) { 1281 return -1; /* empty command */ 1282 } 1283 1284 if (strlen(cmd) >= CFG_CBSIZE) { 1285 puts ("## Command too long!\n"); 1286 return -1; 1287 } 1288 1289 strcpy (cmdbuf, cmd); 1290 1291 /* Process separators and check for invalid 1292 * repeatable commands 1293 */ 1294 1295 #ifdef DEBUG_PARSER 1296 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1297 #endif 1298 while (*str) { 1299 1300 /* 1301 * Find separator, or string end 1302 * Allow simple escape of ';' by writing "\;" 1303 */ 1304 for (inquotes = 0, sep = str; *sep; sep++) { 1305 if ((*sep=='\'') && 1306 (*(sep-1) != '\\')) 1307 inquotes=!inquotes; 1308 1309 if (!inquotes && 1310 (*sep == ';') && /* separator */ 1311 ( sep != str) && /* past string start */ 1312 (*(sep-1) != '\\')) /* and NOT escaped */ 1313 break; 1314 } 1315 1316 /* 1317 * Limit the token to data between separators 1318 */ 1319 token = str; 1320 if (*sep) { 1321 str = sep + 1; /* start of command for next pass */ 1322 *sep = '\0'; 1323 } 1324 else 1325 str = sep; /* no more commands for next pass */ 1326 #ifdef DEBUG_PARSER 1327 printf ("token: \"%s\"\n", token); 1328 #endif 1329 1330 /* find macros in this token and replace them */ 1331 process_macros (token, finaltoken); 1332 1333 /* Extract arguments */ 1334 if ((argc = parse_line (finaltoken, argv)) == 0) { 1335 rc = -1; /* no command at all */ 1336 continue; 1337 } 1338 1339 /* Look up command in command table */ 1340 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1341 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1342 rc = -1; /* give up after bad command */ 1343 continue; 1344 } 1345 1346 /* found - check max args */ 1347 if (argc > cmdtp->maxargs) { 1348 printf ("Usage:\n%s\n", cmdtp->usage); 1349 rc = -1; 1350 continue; 1351 } 1352 1353 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD) 1354 /* avoid "bootd" recursion */ 1355 if (cmdtp->cmd == do_bootd) { 1356 #ifdef DEBUG_PARSER 1357 printf ("[%s]\n", finaltoken); 1358 #endif 1359 if (flag & CMD_FLAG_BOOTD) { 1360 puts ("'bootd' recursion detected\n"); 1361 rc = -1; 1362 continue; 1363 } else { 1364 flag |= CMD_FLAG_BOOTD; 1365 } 1366 } 1367 #endif /* CFG_CMD_BOOTD */ 1368 1369 /* OK - call function to do the command */ 1370 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1371 rc = -1; 1372 } 1373 1374 repeatable &= cmdtp->repeatable; 1375 1376 /* Did the user stop this? */ 1377 if (had_ctrlc ()) 1378 return 0; /* if stopped then not repeatable */ 1379 } 1380 1381 return rc ? rc : repeatable; 1382 } 1383 1384 /****************************************************************************/ 1385 1386 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 1387 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1388 { 1389 int i; 1390 1391 if (argc < 2) { 1392 printf ("Usage:\n%s\n", cmdtp->usage); 1393 return 1; 1394 } 1395 1396 for (i=1; i<argc; ++i) { 1397 char *arg; 1398 1399 if ((arg = getenv (argv[i])) == NULL) { 1400 printf ("## Error: \"%s\" not defined\n", argv[i]); 1401 return 1; 1402 } 1403 #ifndef CFG_HUSH_PARSER 1404 if (run_command (arg, flag) == -1) 1405 return 1; 1406 #else 1407 if (parse_string_outer(arg, 1408 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1409 return 1; 1410 #endif 1411 } 1412 return 0; 1413 } 1414 #endif /* CFG_CMD_RUN */ 1415