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 *argv[]); /* for do_reset() prototype */ 55 #endif 56 57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *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]; /* 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 #if defined(CONFIG_UPDATE_TFTP) 309 update_tftp (); 310 #endif /* CONFIG_UPDATE_TFTP */ 311 312 #ifdef CONFIG_BOOTCOUNT_LIMIT 313 bootcount = bootcount_load(); 314 bootcount++; 315 bootcount_store (bootcount); 316 sprintf (bcs_set, "%lu", bootcount); 317 setenv ("bootcount", bcs_set); 318 bcs = getenv ("bootlimit"); 319 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 320 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 321 322 #ifdef CONFIG_MODEM_SUPPORT 323 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 324 if (do_mdm_init) { 325 char *str = strdup(getenv("mdm_cmd")); 326 setenv ("preboot", str); /* set or delete definition */ 327 if (str != NULL) 328 free (str); 329 mdm_init(); /* wait for modem connection */ 330 } 331 #endif /* CONFIG_MODEM_SUPPORT */ 332 333 #ifdef CONFIG_VERSION_VARIABLE 334 { 335 extern char version_string[]; 336 337 setenv ("ver", version_string); /* set version variable */ 338 } 339 #endif /* CONFIG_VERSION_VARIABLE */ 340 341 #ifdef CONFIG_SYS_HUSH_PARSER 342 u_boot_hush_start (); 343 #endif 344 345 #if defined(CONFIG_HUSH_INIT_VAR) 346 hush_init_var (); 347 #endif 348 349 #ifdef CONFIG_AUTO_COMPLETE 350 install_auto_complete(); 351 #endif 352 353 #ifdef CONFIG_PREBOOT 354 if ((p = getenv ("preboot")) != NULL) { 355 # ifdef CONFIG_AUTOBOOT_KEYED 356 int prev = disable_ctrlc(1); /* disable Control C checking */ 357 # endif 358 359 # ifndef CONFIG_SYS_HUSH_PARSER 360 run_command (p, 0); 361 # else 362 parse_string_outer(p, FLAG_PARSE_SEMICOLON | 363 FLAG_EXIT_FROM_LOOP); 364 # endif 365 366 # ifdef CONFIG_AUTOBOOT_KEYED 367 disable_ctrlc(prev); /* restore Control C checking */ 368 # endif 369 } 370 #endif /* CONFIG_PREBOOT */ 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 #ifdef CONFIG_AMIGAONEG3SE 433 { 434 extern void video_banner(void); 435 video_banner(); 436 } 437 #endif 438 439 /* 440 * Main Loop for Monitor Command Processing 441 */ 442 #ifdef CONFIG_SYS_HUSH_PARSER 443 parse_file_outer(); 444 /* This point is never reached */ 445 for (;;); 446 #else 447 for (;;) { 448 #ifdef CONFIG_BOOT_RETRY_TIME 449 if (rc >= 0) { 450 /* Saw enough of a valid command to 451 * restart the timeout. 452 */ 453 reset_cmd_timeout(); 454 } 455 #endif 456 len = readline (CONFIG_SYS_PROMPT); 457 458 flag = 0; /* assume no special flags for now */ 459 if (len > 0) 460 strcpy (lastcommand, console_buffer); 461 else if (len == 0) 462 flag |= CMD_FLAG_REPEAT; 463 #ifdef CONFIG_BOOT_RETRY_TIME 464 else if (len == -2) { 465 /* -2 means timed out, retry autoboot 466 */ 467 puts ("\nTimed out waiting for command\n"); 468 # ifdef CONFIG_RESET_TO_RETRY 469 /* Reinit board to run initialization code again */ 470 do_reset (NULL, 0, 0, NULL); 471 # else 472 return; /* retry autoboot */ 473 # endif 474 } 475 #endif 476 477 if (len == -1) 478 puts ("<INTERRUPT>\n"); 479 else 480 rc = run_command (lastcommand, flag); 481 482 if (rc <= 0) { 483 /* invalid command or not repeatable, forget it */ 484 lastcommand[0] = 0; 485 } 486 } 487 #endif /*CONFIG_SYS_HUSH_PARSER*/ 488 } 489 490 #ifdef CONFIG_BOOT_RETRY_TIME 491 /*************************************************************************** 492 * initialize command line timeout 493 */ 494 void init_cmd_timeout(void) 495 { 496 char *s = getenv ("bootretry"); 497 498 if (s != NULL) 499 retry_time = (int)simple_strtol(s, NULL, 10); 500 else 501 retry_time = CONFIG_BOOT_RETRY_TIME; 502 503 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 504 retry_time = CONFIG_BOOT_RETRY_MIN; 505 } 506 507 /*************************************************************************** 508 * reset command line timeout to retry_time seconds 509 */ 510 void reset_cmd_timeout(void) 511 { 512 endtime = endtick(retry_time); 513 } 514 #endif 515 516 #ifdef CONFIG_CMDLINE_EDITING 517 518 /* 519 * cmdline-editing related codes from vivi. 520 * Author: Janghoon Lyu <nandy@mizi.com> 521 */ 522 523 #define putnstr(str,n) do { \ 524 printf ("%.*s", (int)n, str); \ 525 } while (0) 526 527 #define CTL_CH(c) ((c) - 'a' + 1) 528 529 #define MAX_CMDBUF_SIZE 256 530 531 #define CTL_BACKSPACE ('\b') 532 #define DEL ((char)255) 533 #define DEL7 ((char)127) 534 #define CREAD_HIST_CHAR ('!') 535 536 #define getcmd_putch(ch) putc(ch) 537 #define getcmd_getch() getc() 538 #define getcmd_cbeep() getcmd_putch('\a') 539 540 #define HIST_MAX 20 541 #define HIST_SIZE MAX_CMDBUF_SIZE 542 543 static int hist_max = 0; 544 static int hist_add_idx = 0; 545 static int hist_cur = -1; 546 unsigned hist_num = 0; 547 548 char* hist_list[HIST_MAX]; 549 char hist_lines[HIST_MAX][HIST_SIZE]; 550 551 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 552 553 static void hist_init(void) 554 { 555 int i; 556 557 hist_max = 0; 558 hist_add_idx = 0; 559 hist_cur = -1; 560 hist_num = 0; 561 562 for (i = 0; i < HIST_MAX; i++) { 563 hist_list[i] = hist_lines[i]; 564 hist_list[i][0] = '\0'; 565 } 566 } 567 568 static void cread_add_to_hist(char *line) 569 { 570 strcpy(hist_list[hist_add_idx], line); 571 572 if (++hist_add_idx >= HIST_MAX) 573 hist_add_idx = 0; 574 575 if (hist_add_idx > hist_max) 576 hist_max = hist_add_idx; 577 578 hist_num++; 579 } 580 581 static char* hist_prev(void) 582 { 583 char *ret; 584 int old_cur; 585 586 if (hist_cur < 0) 587 return NULL; 588 589 old_cur = hist_cur; 590 if (--hist_cur < 0) 591 hist_cur = hist_max; 592 593 if (hist_cur == hist_add_idx) { 594 hist_cur = old_cur; 595 ret = NULL; 596 } else 597 ret = hist_list[hist_cur]; 598 599 return (ret); 600 } 601 602 static char* hist_next(void) 603 { 604 char *ret; 605 606 if (hist_cur < 0) 607 return NULL; 608 609 if (hist_cur == hist_add_idx) 610 return NULL; 611 612 if (++hist_cur > hist_max) 613 hist_cur = 0; 614 615 if (hist_cur == hist_add_idx) { 616 ret = ""; 617 } else 618 ret = hist_list[hist_cur]; 619 620 return (ret); 621 } 622 623 #ifndef CONFIG_CMDLINE_EDITING 624 static void cread_print_hist_list(void) 625 { 626 int i; 627 unsigned long n; 628 629 n = hist_num - hist_max; 630 631 i = hist_add_idx + 1; 632 while (1) { 633 if (i > hist_max) 634 i = 0; 635 if (i == hist_add_idx) 636 break; 637 printf("%s\n", hist_list[i]); 638 n++; 639 i++; 640 } 641 } 642 #endif /* CONFIG_CMDLINE_EDITING */ 643 644 #define BEGINNING_OF_LINE() { \ 645 while (num) { \ 646 getcmd_putch(CTL_BACKSPACE); \ 647 num--; \ 648 } \ 649 } 650 651 #define ERASE_TO_EOL() { \ 652 if (num < eol_num) { \ 653 int tmp; \ 654 for (tmp = num; tmp < eol_num; tmp++) \ 655 getcmd_putch(' '); \ 656 while (tmp-- > num) \ 657 getcmd_putch(CTL_BACKSPACE); \ 658 eol_num = num; \ 659 } \ 660 } 661 662 #define REFRESH_TO_EOL() { \ 663 if (num < eol_num) { \ 664 wlen = eol_num - num; \ 665 putnstr(buf + num, wlen); \ 666 num = eol_num; \ 667 } \ 668 } 669 670 static void cread_add_char(char ichar, int insert, unsigned long *num, 671 unsigned long *eol_num, char *buf, unsigned long len) 672 { 673 unsigned long wlen; 674 675 /* room ??? */ 676 if (insert || *num == *eol_num) { 677 if (*eol_num > len - 1) { 678 getcmd_cbeep(); 679 return; 680 } 681 (*eol_num)++; 682 } 683 684 if (insert) { 685 wlen = *eol_num - *num; 686 if (wlen > 1) { 687 memmove(&buf[*num+1], &buf[*num], wlen-1); 688 } 689 690 buf[*num] = ichar; 691 putnstr(buf + *num, wlen); 692 (*num)++; 693 while (--wlen) { 694 getcmd_putch(CTL_BACKSPACE); 695 } 696 } else { 697 /* echo the character */ 698 wlen = 1; 699 buf[*num] = ichar; 700 putnstr(buf + *num, wlen); 701 (*num)++; 702 } 703 } 704 705 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 706 unsigned long *eol_num, char *buf, unsigned long len) 707 { 708 while (strsize--) { 709 cread_add_char(*str, insert, num, eol_num, buf, len); 710 str++; 711 } 712 } 713 714 static int cread_line(const char *const prompt, char *buf, unsigned int *len) 715 { 716 unsigned long num = 0; 717 unsigned long eol_num = 0; 718 unsigned long rlen; 719 unsigned long wlen; 720 char ichar; 721 int insert = 1; 722 int esc_len = 0; 723 int rc = 0; 724 char esc_save[8]; 725 726 while (1) { 727 rlen = 1; 728 #ifdef CONFIG_BOOT_RETRY_TIME 729 while (!tstc()) { /* while no incoming data */ 730 if (retry_time >= 0 && get_ticks() > endtime) 731 return (-2); /* timed out */ 732 } 733 #endif 734 735 ichar = getcmd_getch(); 736 737 if ((ichar == '\n') || (ichar == '\r')) { 738 putc('\n'); 739 break; 740 } 741 742 /* 743 * handle standard linux xterm esc sequences for arrow key, etc. 744 */ 745 if (esc_len != 0) { 746 if (esc_len == 1) { 747 if (ichar == '[') { 748 esc_save[esc_len] = ichar; 749 esc_len = 2; 750 } else { 751 cread_add_str(esc_save, esc_len, insert, 752 &num, &eol_num, buf, *len); 753 esc_len = 0; 754 } 755 continue; 756 } 757 758 switch (ichar) { 759 760 case 'D': /* <- key */ 761 ichar = CTL_CH('b'); 762 esc_len = 0; 763 break; 764 case 'C': /* -> key */ 765 ichar = CTL_CH('f'); 766 esc_len = 0; 767 break; /* pass off to ^F handler */ 768 case 'H': /* Home key */ 769 ichar = CTL_CH('a'); 770 esc_len = 0; 771 break; /* pass off to ^A handler */ 772 case 'A': /* up arrow */ 773 ichar = CTL_CH('p'); 774 esc_len = 0; 775 break; /* pass off to ^P handler */ 776 case 'B': /* down arrow */ 777 ichar = CTL_CH('n'); 778 esc_len = 0; 779 break; /* pass off to ^N handler */ 780 default: 781 esc_save[esc_len++] = ichar; 782 cread_add_str(esc_save, esc_len, insert, 783 &num, &eol_num, buf, *len); 784 esc_len = 0; 785 continue; 786 } 787 } 788 789 switch (ichar) { 790 case 0x1b: 791 if (esc_len == 0) { 792 esc_save[esc_len] = ichar; 793 esc_len = 1; 794 } else { 795 puts("impossible condition #876\n"); 796 esc_len = 0; 797 } 798 break; 799 800 case CTL_CH('a'): 801 BEGINNING_OF_LINE(); 802 break; 803 case CTL_CH('c'): /* ^C - break */ 804 *buf = '\0'; /* discard input */ 805 return (-1); 806 case CTL_CH('f'): 807 if (num < eol_num) { 808 getcmd_putch(buf[num]); 809 num++; 810 } 811 break; 812 case CTL_CH('b'): 813 if (num) { 814 getcmd_putch(CTL_BACKSPACE); 815 num--; 816 } 817 break; 818 case CTL_CH('d'): 819 if (num < eol_num) { 820 wlen = eol_num - num - 1; 821 if (wlen) { 822 memmove(&buf[num], &buf[num+1], wlen); 823 putnstr(buf + num, wlen); 824 } 825 826 getcmd_putch(' '); 827 do { 828 getcmd_putch(CTL_BACKSPACE); 829 } while (wlen--); 830 eol_num--; 831 } 832 break; 833 case CTL_CH('k'): 834 ERASE_TO_EOL(); 835 break; 836 case CTL_CH('e'): 837 REFRESH_TO_EOL(); 838 break; 839 case CTL_CH('o'): 840 insert = !insert; 841 break; 842 case CTL_CH('x'): 843 case CTL_CH('u'): 844 BEGINNING_OF_LINE(); 845 ERASE_TO_EOL(); 846 break; 847 case DEL: 848 case DEL7: 849 case 8: 850 if (num) { 851 wlen = eol_num - num; 852 num--; 853 memmove(&buf[num], &buf[num+1], wlen); 854 getcmd_putch(CTL_BACKSPACE); 855 putnstr(buf + num, wlen); 856 getcmd_putch(' '); 857 do { 858 getcmd_putch(CTL_BACKSPACE); 859 } while (wlen--); 860 eol_num--; 861 } 862 break; 863 case CTL_CH('p'): 864 case CTL_CH('n'): 865 { 866 char * hline; 867 868 esc_len = 0; 869 870 if (ichar == CTL_CH('p')) 871 hline = hist_prev(); 872 else 873 hline = hist_next(); 874 875 if (!hline) { 876 getcmd_cbeep(); 877 continue; 878 } 879 880 /* nuke the current line */ 881 /* first, go home */ 882 BEGINNING_OF_LINE(); 883 884 /* erase to end of line */ 885 ERASE_TO_EOL(); 886 887 /* copy new line into place and display */ 888 strcpy(buf, hline); 889 eol_num = strlen(buf); 890 REFRESH_TO_EOL(); 891 continue; 892 } 893 #ifdef CONFIG_AUTO_COMPLETE 894 case '\t': { 895 int num2, col; 896 897 /* do not autocomplete when in the middle */ 898 if (num < eol_num) { 899 getcmd_cbeep(); 900 break; 901 } 902 903 buf[num] = '\0'; 904 col = strlen(prompt) + eol_num; 905 num2 = num; 906 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 907 col = num2 - num; 908 num += col; 909 eol_num += col; 910 } 911 break; 912 } 913 #endif 914 default: 915 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 916 break; 917 } 918 } 919 *len = eol_num; 920 buf[eol_num] = '\0'; /* lose the newline */ 921 922 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 923 cread_add_to_hist(buf); 924 hist_cur = hist_add_idx; 925 926 return (rc); 927 } 928 929 #endif /* CONFIG_CMDLINE_EDITING */ 930 931 /****************************************************************************/ 932 933 /* 934 * Prompt for input and read a line. 935 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 936 * time out when time goes past endtime (timebase time in ticks). 937 * Return: number of read characters 938 * -1 if break 939 * -2 if timed out 940 */ 941 int readline (const char *const prompt) 942 { 943 return readline_into_buffer(prompt, console_buffer); 944 } 945 946 947 int readline_into_buffer (const char *const prompt, char * buffer) 948 { 949 char *p = buffer; 950 #ifdef CONFIG_CMDLINE_EDITING 951 unsigned int len=MAX_CMDBUF_SIZE; 952 int rc; 953 static int initted = 0; 954 955 /* 956 * History uses a global array which is not 957 * writable until after relocation to RAM. 958 * Revert to non-history version if still 959 * running from flash. 960 */ 961 if (gd->flags & GD_FLG_RELOC) { 962 if (!initted) { 963 hist_init(); 964 initted = 1; 965 } 966 967 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 } 993 #endif 994 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 995 996 #ifdef CONFIG_SHOW_ACTIVITY 997 while (!tstc()) { 998 extern void show_activity(int arg); 999 show_activity(0); 1000 } 1001 #endif 1002 c = getc(); 1003 1004 /* 1005 * Special character handling 1006 */ 1007 switch (c) { 1008 case '\r': /* Enter */ 1009 case '\n': 1010 *p = '\0'; 1011 puts ("\r\n"); 1012 return (p - p_buf); 1013 1014 case '\0': /* nul */ 1015 continue; 1016 1017 case 0x03: /* ^C - break */ 1018 p_buf[0] = '\0'; /* discard input */ 1019 return (-1); 1020 1021 case 0x15: /* ^U - erase line */ 1022 while (col > plen) { 1023 puts (erase_seq); 1024 --col; 1025 } 1026 p = p_buf; 1027 n = 0; 1028 continue; 1029 1030 case 0x17: /* ^W - erase word */ 1031 p=delete_char(p_buf, p, &col, &n, plen); 1032 while ((n > 0) && (*p != ' ')) { 1033 p=delete_char(p_buf, p, &col, &n, plen); 1034 } 1035 continue; 1036 1037 case 0x08: /* ^H - backspace */ 1038 case 0x7F: /* DEL - backspace */ 1039 p=delete_char(p_buf, p, &col, &n, plen); 1040 continue; 1041 1042 default: 1043 /* 1044 * Must be a normal character then 1045 */ 1046 if (n < CONFIG_SYS_CBSIZE-2) { 1047 if (c == '\t') { /* expand TABs */ 1048 #ifdef CONFIG_AUTO_COMPLETE 1049 /* if auto completion triggered just continue */ 1050 *p = '\0'; 1051 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1052 p = p_buf + n; /* reset */ 1053 continue; 1054 } 1055 #endif 1056 puts (tab_seq+(col&07)); 1057 col += 8 - (col&07); 1058 } else { 1059 ++col; /* echo input */ 1060 putc (c); 1061 } 1062 *p++ = c; 1063 ++n; 1064 } else { /* Buffer full */ 1065 putc ('\a'); 1066 } 1067 } 1068 } 1069 #ifdef CONFIG_CMDLINE_EDITING 1070 } 1071 #endif 1072 } 1073 1074 /****************************************************************************/ 1075 1076 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1077 { 1078 char *s; 1079 1080 if (*np == 0) { 1081 return (p); 1082 } 1083 1084 if (*(--p) == '\t') { /* will retype the whole line */ 1085 while (*colp > plen) { 1086 puts (erase_seq); 1087 (*colp)--; 1088 } 1089 for (s=buffer; s<p; ++s) { 1090 if (*s == '\t') { 1091 puts (tab_seq+((*colp) & 07)); 1092 *colp += 8 - ((*colp) & 07); 1093 } else { 1094 ++(*colp); 1095 putc (*s); 1096 } 1097 } 1098 } else { 1099 puts (erase_seq); 1100 (*colp)--; 1101 } 1102 (*np)--; 1103 return (p); 1104 } 1105 1106 /****************************************************************************/ 1107 1108 int parse_line (char *line, char *argv[]) 1109 { 1110 int nargs = 0; 1111 1112 #ifdef DEBUG_PARSER 1113 printf ("parse_line: \"%s\"\n", line); 1114 #endif 1115 while (nargs < CONFIG_SYS_MAXARGS) { 1116 1117 /* skip any white space */ 1118 while ((*line == ' ') || (*line == '\t')) { 1119 ++line; 1120 } 1121 1122 if (*line == '\0') { /* end of line, no more args */ 1123 argv[nargs] = NULL; 1124 #ifdef DEBUG_PARSER 1125 printf ("parse_line: nargs=%d\n", nargs); 1126 #endif 1127 return (nargs); 1128 } 1129 1130 argv[nargs++] = line; /* begin of argument string */ 1131 1132 /* find end of string */ 1133 while (*line && (*line != ' ') && (*line != '\t')) { 1134 ++line; 1135 } 1136 1137 if (*line == '\0') { /* end of line, no more args */ 1138 argv[nargs] = NULL; 1139 #ifdef DEBUG_PARSER 1140 printf ("parse_line: nargs=%d\n", nargs); 1141 #endif 1142 return (nargs); 1143 } 1144 1145 *line++ = '\0'; /* terminate current arg */ 1146 } 1147 1148 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1149 1150 #ifdef DEBUG_PARSER 1151 printf ("parse_line: nargs=%d\n", nargs); 1152 #endif 1153 return (nargs); 1154 } 1155 1156 /****************************************************************************/ 1157 1158 static void process_macros (const char *input, char *output) 1159 { 1160 char c, prev; 1161 const char *varname_start = NULL; 1162 int inputcnt = strlen (input); 1163 int outputcnt = CONFIG_SYS_CBSIZE; 1164 int state = 0; /* 0 = waiting for '$' */ 1165 1166 /* 1 = waiting for '(' or '{' */ 1167 /* 2 = waiting for ')' or '}' */ 1168 /* 3 = waiting for ''' */ 1169 #ifdef DEBUG_PARSER 1170 char *output_start = output; 1171 1172 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1173 input); 1174 #endif 1175 1176 prev = '\0'; /* previous character */ 1177 1178 while (inputcnt && outputcnt) { 1179 c = *input++; 1180 inputcnt--; 1181 1182 if (state != 3) { 1183 /* remove one level of escape characters */ 1184 if ((c == '\\') && (prev != '\\')) { 1185 if (inputcnt-- == 0) 1186 break; 1187 prev = c; 1188 c = *input++; 1189 } 1190 } 1191 1192 switch (state) { 1193 case 0: /* Waiting for (unescaped) $ */ 1194 if ((c == '\'') && (prev != '\\')) { 1195 state = 3; 1196 break; 1197 } 1198 if ((c == '$') && (prev != '\\')) { 1199 state++; 1200 } else { 1201 *(output++) = c; 1202 outputcnt--; 1203 } 1204 break; 1205 case 1: /* Waiting for ( */ 1206 if (c == '(' || c == '{') { 1207 state++; 1208 varname_start = input; 1209 } else { 1210 state = 0; 1211 *(output++) = '$'; 1212 outputcnt--; 1213 1214 if (outputcnt) { 1215 *(output++) = c; 1216 outputcnt--; 1217 } 1218 } 1219 break; 1220 case 2: /* Waiting for ) */ 1221 if (c == ')' || c == '}') { 1222 int i; 1223 char envname[CONFIG_SYS_CBSIZE], *envval; 1224 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1225 1226 /* Get the varname */ 1227 for (i = 0; i < envcnt; i++) { 1228 envname[i] = varname_start[i]; 1229 } 1230 envname[i] = 0; 1231 1232 /* Get its value */ 1233 envval = getenv (envname); 1234 1235 /* Copy into the line if it exists */ 1236 if (envval != NULL) 1237 while ((*envval) && outputcnt) { 1238 *(output++) = *(envval++); 1239 outputcnt--; 1240 } 1241 /* Look for another '$' */ 1242 state = 0; 1243 } 1244 break; 1245 case 3: /* Waiting for ' */ 1246 if ((c == '\'') && (prev != '\\')) { 1247 state = 0; 1248 } else { 1249 *(output++) = c; 1250 outputcnt--; 1251 } 1252 break; 1253 } 1254 prev = c; 1255 } 1256 1257 if (outputcnt) 1258 *output = 0; 1259 else 1260 *(output - 1) = 0; 1261 1262 #ifdef DEBUG_PARSER 1263 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1264 strlen (output_start), output_start); 1265 #endif 1266 } 1267 1268 /**************************************************************************** 1269 * returns: 1270 * 1 - command executed, repeatable 1271 * 0 - command executed but not repeatable, interrupted commands are 1272 * always considered not repeatable 1273 * -1 - not executed (unrecognized, bootd recursion or too many args) 1274 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1275 * considered unrecognized) 1276 * 1277 * WARNING: 1278 * 1279 * We must create a temporary copy of the command since the command we get 1280 * may be the result from getenv(), which returns a pointer directly to 1281 * the environment data, which may change magicly when the command we run 1282 * creates or modifies environment variables (like "bootp" does). 1283 */ 1284 1285 int run_command (const char *cmd, int flag) 1286 { 1287 cmd_tbl_t *cmdtp; 1288 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1289 char *token; /* start of token in cmdbuf */ 1290 char *sep; /* end of token (separator) in cmdbuf */ 1291 char finaltoken[CONFIG_SYS_CBSIZE]; 1292 char *str = cmdbuf; 1293 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1294 int argc, inquotes; 1295 int repeatable = 1; 1296 int rc = 0; 1297 1298 #ifdef DEBUG_PARSER 1299 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1300 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1301 puts ("\"\n"); 1302 #endif 1303 1304 clear_ctrlc(); /* forget any previous Control C */ 1305 1306 if (!cmd || !*cmd) { 1307 return -1; /* empty command */ 1308 } 1309 1310 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1311 puts ("## Command too long!\n"); 1312 return -1; 1313 } 1314 1315 strcpy (cmdbuf, cmd); 1316 1317 /* Process separators and check for invalid 1318 * repeatable commands 1319 */ 1320 1321 #ifdef DEBUG_PARSER 1322 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1323 #endif 1324 while (*str) { 1325 1326 /* 1327 * Find separator, or string end 1328 * Allow simple escape of ';' by writing "\;" 1329 */ 1330 for (inquotes = 0, sep = str; *sep; sep++) { 1331 if ((*sep=='\'') && 1332 (*(sep-1) != '\\')) 1333 inquotes=!inquotes; 1334 1335 if (!inquotes && 1336 (*sep == ';') && /* separator */ 1337 ( sep != str) && /* past string start */ 1338 (*(sep-1) != '\\')) /* and NOT escaped */ 1339 break; 1340 } 1341 1342 /* 1343 * Limit the token to data between separators 1344 */ 1345 token = str; 1346 if (*sep) { 1347 str = sep + 1; /* start of command for next pass */ 1348 *sep = '\0'; 1349 } 1350 else 1351 str = sep; /* no more commands for next pass */ 1352 #ifdef DEBUG_PARSER 1353 printf ("token: \"%s\"\n", token); 1354 #endif 1355 1356 /* find macros in this token and replace them */ 1357 process_macros (token, finaltoken); 1358 1359 /* Extract arguments */ 1360 if ((argc = parse_line (finaltoken, argv)) == 0) { 1361 rc = -1; /* no command at all */ 1362 continue; 1363 } 1364 1365 /* Look up command in command table */ 1366 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1367 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1368 rc = -1; /* give up after bad command */ 1369 continue; 1370 } 1371 1372 /* found - check max args */ 1373 if (argc > cmdtp->maxargs) { 1374 cmd_usage(cmdtp); 1375 rc = -1; 1376 continue; 1377 } 1378 1379 #if defined(CONFIG_CMD_BOOTD) 1380 /* avoid "bootd" recursion */ 1381 if (cmdtp->cmd == do_bootd) { 1382 #ifdef DEBUG_PARSER 1383 printf ("[%s]\n", finaltoken); 1384 #endif 1385 if (flag & CMD_FLAG_BOOTD) { 1386 puts ("'bootd' recursion detected\n"); 1387 rc = -1; 1388 continue; 1389 } else { 1390 flag |= CMD_FLAG_BOOTD; 1391 } 1392 } 1393 #endif 1394 1395 /* OK - call function to do the command */ 1396 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1397 rc = -1; 1398 } 1399 1400 repeatable &= cmdtp->repeatable; 1401 1402 /* Did the user stop this? */ 1403 if (had_ctrlc ()) 1404 return -1; /* if stopped then not repeatable */ 1405 } 1406 1407 return rc ? rc : repeatable; 1408 } 1409 1410 /****************************************************************************/ 1411 1412 #if defined(CONFIG_CMD_RUN) 1413 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1414 { 1415 int i; 1416 1417 if (argc < 2) { 1418 cmd_usage(cmdtp); 1419 return 1; 1420 } 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