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 wlen; 719 char ichar; 720 int insert = 1; 721 int esc_len = 0; 722 char esc_save[8]; 723 int init_len = strlen(buf); 724 725 if (init_len) 726 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 727 728 while (1) { 729 #ifdef CONFIG_BOOT_RETRY_TIME 730 while (!tstc()) { /* while no incoming data */ 731 if (retry_time >= 0 && get_ticks() > endtime) 732 return (-2); /* timed out */ 733 } 734 #endif 735 736 ichar = getcmd_getch(); 737 738 if ((ichar == '\n') || (ichar == '\r')) { 739 putc('\n'); 740 break; 741 } 742 743 /* 744 * handle standard linux xterm esc sequences for arrow key, etc. 745 */ 746 if (esc_len != 0) { 747 if (esc_len == 1) { 748 if (ichar == '[') { 749 esc_save[esc_len] = ichar; 750 esc_len = 2; 751 } else { 752 cread_add_str(esc_save, esc_len, insert, 753 &num, &eol_num, buf, *len); 754 esc_len = 0; 755 } 756 continue; 757 } 758 759 switch (ichar) { 760 761 case 'D': /* <- key */ 762 ichar = CTL_CH('b'); 763 esc_len = 0; 764 break; 765 case 'C': /* -> key */ 766 ichar = CTL_CH('f'); 767 esc_len = 0; 768 break; /* pass off to ^F handler */ 769 case 'H': /* Home key */ 770 ichar = CTL_CH('a'); 771 esc_len = 0; 772 break; /* pass off to ^A handler */ 773 case 'A': /* up arrow */ 774 ichar = CTL_CH('p'); 775 esc_len = 0; 776 break; /* pass off to ^P handler */ 777 case 'B': /* down arrow */ 778 ichar = CTL_CH('n'); 779 esc_len = 0; 780 break; /* pass off to ^N handler */ 781 default: 782 esc_save[esc_len++] = ichar; 783 cread_add_str(esc_save, esc_len, insert, 784 &num, &eol_num, buf, *len); 785 esc_len = 0; 786 continue; 787 } 788 } 789 790 switch (ichar) { 791 case 0x1b: 792 if (esc_len == 0) { 793 esc_save[esc_len] = ichar; 794 esc_len = 1; 795 } else { 796 puts("impossible condition #876\n"); 797 esc_len = 0; 798 } 799 break; 800 801 case CTL_CH('a'): 802 BEGINNING_OF_LINE(); 803 break; 804 case CTL_CH('c'): /* ^C - break */ 805 *buf = '\0'; /* discard input */ 806 return (-1); 807 case CTL_CH('f'): 808 if (num < eol_num) { 809 getcmd_putch(buf[num]); 810 num++; 811 } 812 break; 813 case CTL_CH('b'): 814 if (num) { 815 getcmd_putch(CTL_BACKSPACE); 816 num--; 817 } 818 break; 819 case CTL_CH('d'): 820 if (num < eol_num) { 821 wlen = eol_num - num - 1; 822 if (wlen) { 823 memmove(&buf[num], &buf[num+1], wlen); 824 putnstr(buf + num, wlen); 825 } 826 827 getcmd_putch(' '); 828 do { 829 getcmd_putch(CTL_BACKSPACE); 830 } while (wlen--); 831 eol_num--; 832 } 833 break; 834 case CTL_CH('k'): 835 ERASE_TO_EOL(); 836 break; 837 case CTL_CH('e'): 838 REFRESH_TO_EOL(); 839 break; 840 case CTL_CH('o'): 841 insert = !insert; 842 break; 843 case CTL_CH('x'): 844 case CTL_CH('u'): 845 BEGINNING_OF_LINE(); 846 ERASE_TO_EOL(); 847 break; 848 case DEL: 849 case DEL7: 850 case 8: 851 if (num) { 852 wlen = eol_num - num; 853 num--; 854 memmove(&buf[num], &buf[num+1], wlen); 855 getcmd_putch(CTL_BACKSPACE); 856 putnstr(buf + num, wlen); 857 getcmd_putch(' '); 858 do { 859 getcmd_putch(CTL_BACKSPACE); 860 } while (wlen--); 861 eol_num--; 862 } 863 break; 864 case CTL_CH('p'): 865 case CTL_CH('n'): 866 { 867 char * hline; 868 869 esc_len = 0; 870 871 if (ichar == CTL_CH('p')) 872 hline = hist_prev(); 873 else 874 hline = hist_next(); 875 876 if (!hline) { 877 getcmd_cbeep(); 878 continue; 879 } 880 881 /* nuke the current line */ 882 /* first, go home */ 883 BEGINNING_OF_LINE(); 884 885 /* erase to end of line */ 886 ERASE_TO_EOL(); 887 888 /* copy new line into place and display */ 889 strcpy(buf, hline); 890 eol_num = strlen(buf); 891 REFRESH_TO_EOL(); 892 continue; 893 } 894 #ifdef CONFIG_AUTO_COMPLETE 895 case '\t': { 896 int num2, col; 897 898 /* do not autocomplete when in the middle */ 899 if (num < eol_num) { 900 getcmd_cbeep(); 901 break; 902 } 903 904 buf[num] = '\0'; 905 col = strlen(prompt) + eol_num; 906 num2 = num; 907 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 908 col = num2 - num; 909 num += col; 910 eol_num += col; 911 } 912 break; 913 } 914 #endif 915 default: 916 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 917 break; 918 } 919 } 920 *len = eol_num; 921 buf[eol_num] = '\0'; /* lose the newline */ 922 923 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 924 cread_add_to_hist(buf); 925 hist_cur = hist_add_idx; 926 927 return 0; 928 } 929 930 #endif /* CONFIG_CMDLINE_EDITING */ 931 932 /****************************************************************************/ 933 934 /* 935 * Prompt for input and read a line. 936 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 937 * time out when time goes past endtime (timebase time in ticks). 938 * Return: number of read characters 939 * -1 if break 940 * -2 if timed out 941 */ 942 int readline (const char *const prompt) 943 { 944 /* 945 * If console_buffer isn't 0-length the user will be prompted to modify 946 * it instead of entering it from scratch as desired. 947 */ 948 console_buffer[0] = '\0'; 949 950 return readline_into_buffer(prompt, console_buffer); 951 } 952 953 954 int readline_into_buffer (const char *const prompt, char * buffer) 955 { 956 char *p = buffer; 957 #ifdef CONFIG_CMDLINE_EDITING 958 unsigned int len=MAX_CMDBUF_SIZE; 959 int rc; 960 static int initted = 0; 961 962 /* 963 * History uses a global array which is not 964 * writable until after relocation to RAM. 965 * Revert to non-history version if still 966 * running from flash. 967 */ 968 if (gd->flags & GD_FLG_RELOC) { 969 if (!initted) { 970 hist_init(); 971 initted = 1; 972 } 973 974 if (prompt) 975 puts (prompt); 976 977 rc = cread_line(prompt, p, &len); 978 return rc < 0 ? rc : len; 979 980 } else { 981 #endif /* CONFIG_CMDLINE_EDITING */ 982 char * p_buf = p; 983 int n = 0; /* buffer index */ 984 int plen = 0; /* prompt length */ 985 int col; /* output column cnt */ 986 char c; 987 988 /* print prompt */ 989 if (prompt) { 990 plen = strlen (prompt); 991 puts (prompt); 992 } 993 col = plen; 994 995 for (;;) { 996 #ifdef CONFIG_BOOT_RETRY_TIME 997 while (!tstc()) { /* while no incoming data */ 998 if (retry_time >= 0 && get_ticks() > endtime) 999 return (-2); /* timed out */ 1000 } 1001 #endif 1002 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 1003 1004 #ifdef CONFIG_SHOW_ACTIVITY 1005 while (!tstc()) { 1006 extern void show_activity(int arg); 1007 show_activity(0); 1008 } 1009 #endif 1010 c = getc(); 1011 1012 /* 1013 * Special character handling 1014 */ 1015 switch (c) { 1016 case '\r': /* Enter */ 1017 case '\n': 1018 *p = '\0'; 1019 puts ("\r\n"); 1020 return (p - p_buf); 1021 1022 case '\0': /* nul */ 1023 continue; 1024 1025 case 0x03: /* ^C - break */ 1026 p_buf[0] = '\0'; /* discard input */ 1027 return (-1); 1028 1029 case 0x15: /* ^U - erase line */ 1030 while (col > plen) { 1031 puts (erase_seq); 1032 --col; 1033 } 1034 p = p_buf; 1035 n = 0; 1036 continue; 1037 1038 case 0x17: /* ^W - erase word */ 1039 p=delete_char(p_buf, p, &col, &n, plen); 1040 while ((n > 0) && (*p != ' ')) { 1041 p=delete_char(p_buf, p, &col, &n, plen); 1042 } 1043 continue; 1044 1045 case 0x08: /* ^H - backspace */ 1046 case 0x7F: /* DEL - backspace */ 1047 p=delete_char(p_buf, p, &col, &n, plen); 1048 continue; 1049 1050 default: 1051 /* 1052 * Must be a normal character then 1053 */ 1054 if (n < CONFIG_SYS_CBSIZE-2) { 1055 if (c == '\t') { /* expand TABs */ 1056 #ifdef CONFIG_AUTO_COMPLETE 1057 /* if auto completion triggered just continue */ 1058 *p = '\0'; 1059 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1060 p = p_buf + n; /* reset */ 1061 continue; 1062 } 1063 #endif 1064 puts (tab_seq+(col&07)); 1065 col += 8 - (col&07); 1066 } else { 1067 ++col; /* echo input */ 1068 putc (c); 1069 } 1070 *p++ = c; 1071 ++n; 1072 } else { /* Buffer full */ 1073 putc ('\a'); 1074 } 1075 } 1076 } 1077 #ifdef CONFIG_CMDLINE_EDITING 1078 } 1079 #endif 1080 } 1081 1082 /****************************************************************************/ 1083 1084 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1085 { 1086 char *s; 1087 1088 if (*np == 0) { 1089 return (p); 1090 } 1091 1092 if (*(--p) == '\t') { /* will retype the whole line */ 1093 while (*colp > plen) { 1094 puts (erase_seq); 1095 (*colp)--; 1096 } 1097 for (s=buffer; s<p; ++s) { 1098 if (*s == '\t') { 1099 puts (tab_seq+((*colp) & 07)); 1100 *colp += 8 - ((*colp) & 07); 1101 } else { 1102 ++(*colp); 1103 putc (*s); 1104 } 1105 } 1106 } else { 1107 puts (erase_seq); 1108 (*colp)--; 1109 } 1110 (*np)--; 1111 return (p); 1112 } 1113 1114 /****************************************************************************/ 1115 1116 int parse_line (char *line, char *argv[]) 1117 { 1118 int nargs = 0; 1119 1120 #ifdef DEBUG_PARSER 1121 printf ("parse_line: \"%s\"\n", line); 1122 #endif 1123 while (nargs < CONFIG_SYS_MAXARGS) { 1124 1125 /* skip any white space */ 1126 while ((*line == ' ') || (*line == '\t')) { 1127 ++line; 1128 } 1129 1130 if (*line == '\0') { /* end of line, no more args */ 1131 argv[nargs] = NULL; 1132 #ifdef DEBUG_PARSER 1133 printf ("parse_line: nargs=%d\n", nargs); 1134 #endif 1135 return (nargs); 1136 } 1137 1138 argv[nargs++] = line; /* begin of argument string */ 1139 1140 /* find end of string */ 1141 while (*line && (*line != ' ') && (*line != '\t')) { 1142 ++line; 1143 } 1144 1145 if (*line == '\0') { /* end of line, no more args */ 1146 argv[nargs] = NULL; 1147 #ifdef DEBUG_PARSER 1148 printf ("parse_line: nargs=%d\n", nargs); 1149 #endif 1150 return (nargs); 1151 } 1152 1153 *line++ = '\0'; /* terminate current arg */ 1154 } 1155 1156 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1157 1158 #ifdef DEBUG_PARSER 1159 printf ("parse_line: nargs=%d\n", nargs); 1160 #endif 1161 return (nargs); 1162 } 1163 1164 /****************************************************************************/ 1165 1166 static void process_macros (const char *input, char *output) 1167 { 1168 char c, prev; 1169 const char *varname_start = NULL; 1170 int inputcnt = strlen (input); 1171 int outputcnt = CONFIG_SYS_CBSIZE; 1172 int state = 0; /* 0 = waiting for '$' */ 1173 1174 /* 1 = waiting for '(' or '{' */ 1175 /* 2 = waiting for ')' or '}' */ 1176 /* 3 = waiting for ''' */ 1177 #ifdef DEBUG_PARSER 1178 char *output_start = output; 1179 1180 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1181 input); 1182 #endif 1183 1184 prev = '\0'; /* previous character */ 1185 1186 while (inputcnt && outputcnt) { 1187 c = *input++; 1188 inputcnt--; 1189 1190 if (state != 3) { 1191 /* remove one level of escape characters */ 1192 if ((c == '\\') && (prev != '\\')) { 1193 if (inputcnt-- == 0) 1194 break; 1195 prev = c; 1196 c = *input++; 1197 } 1198 } 1199 1200 switch (state) { 1201 case 0: /* Waiting for (unescaped) $ */ 1202 if ((c == '\'') && (prev != '\\')) { 1203 state = 3; 1204 break; 1205 } 1206 if ((c == '$') && (prev != '\\')) { 1207 state++; 1208 } else { 1209 *(output++) = c; 1210 outputcnt--; 1211 } 1212 break; 1213 case 1: /* Waiting for ( */ 1214 if (c == '(' || c == '{') { 1215 state++; 1216 varname_start = input; 1217 } else { 1218 state = 0; 1219 *(output++) = '$'; 1220 outputcnt--; 1221 1222 if (outputcnt) { 1223 *(output++) = c; 1224 outputcnt--; 1225 } 1226 } 1227 break; 1228 case 2: /* Waiting for ) */ 1229 if (c == ')' || c == '}') { 1230 int i; 1231 char envname[CONFIG_SYS_CBSIZE], *envval; 1232 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1233 1234 /* Get the varname */ 1235 for (i = 0; i < envcnt; i++) { 1236 envname[i] = varname_start[i]; 1237 } 1238 envname[i] = 0; 1239 1240 /* Get its value */ 1241 envval = getenv (envname); 1242 1243 /* Copy into the line if it exists */ 1244 if (envval != NULL) 1245 while ((*envval) && outputcnt) { 1246 *(output++) = *(envval++); 1247 outputcnt--; 1248 } 1249 /* Look for another '$' */ 1250 state = 0; 1251 } 1252 break; 1253 case 3: /* Waiting for ' */ 1254 if ((c == '\'') && (prev != '\\')) { 1255 state = 0; 1256 } else { 1257 *(output++) = c; 1258 outputcnt--; 1259 } 1260 break; 1261 } 1262 prev = c; 1263 } 1264 1265 if (outputcnt) 1266 *output = 0; 1267 else 1268 *(output - 1) = 0; 1269 1270 #ifdef DEBUG_PARSER 1271 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1272 strlen (output_start), output_start); 1273 #endif 1274 } 1275 1276 /**************************************************************************** 1277 * returns: 1278 * 1 - command executed, repeatable 1279 * 0 - command executed but not repeatable, interrupted commands are 1280 * always considered not repeatable 1281 * -1 - not executed (unrecognized, bootd recursion or too many args) 1282 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1283 * considered unrecognized) 1284 * 1285 * WARNING: 1286 * 1287 * We must create a temporary copy of the command since the command we get 1288 * may be the result from getenv(), which returns a pointer directly to 1289 * the environment data, which may change magicly when the command we run 1290 * creates or modifies environment variables (like "bootp" does). 1291 */ 1292 1293 int run_command (const char *cmd, int flag) 1294 { 1295 cmd_tbl_t *cmdtp; 1296 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1297 char *token; /* start of token in cmdbuf */ 1298 char *sep; /* end of token (separator) in cmdbuf */ 1299 char finaltoken[CONFIG_SYS_CBSIZE]; 1300 char *str = cmdbuf; 1301 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1302 int argc, inquotes; 1303 int repeatable = 1; 1304 int rc = 0; 1305 1306 #ifdef DEBUG_PARSER 1307 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1308 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1309 puts ("\"\n"); 1310 #endif 1311 1312 clear_ctrlc(); /* forget any previous Control C */ 1313 1314 if (!cmd || !*cmd) { 1315 return -1; /* empty command */ 1316 } 1317 1318 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1319 puts ("## Command too long!\n"); 1320 return -1; 1321 } 1322 1323 strcpy (cmdbuf, cmd); 1324 1325 /* Process separators and check for invalid 1326 * repeatable commands 1327 */ 1328 1329 #ifdef DEBUG_PARSER 1330 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1331 #endif 1332 while (*str) { 1333 1334 /* 1335 * Find separator, or string end 1336 * Allow simple escape of ';' by writing "\;" 1337 */ 1338 for (inquotes = 0, sep = str; *sep; sep++) { 1339 if ((*sep=='\'') && 1340 (*(sep-1) != '\\')) 1341 inquotes=!inquotes; 1342 1343 if (!inquotes && 1344 (*sep == ';') && /* separator */ 1345 ( sep != str) && /* past string start */ 1346 (*(sep-1) != '\\')) /* and NOT escaped */ 1347 break; 1348 } 1349 1350 /* 1351 * Limit the token to data between separators 1352 */ 1353 token = str; 1354 if (*sep) { 1355 str = sep + 1; /* start of command for next pass */ 1356 *sep = '\0'; 1357 } 1358 else 1359 str = sep; /* no more commands for next pass */ 1360 #ifdef DEBUG_PARSER 1361 printf ("token: \"%s\"\n", token); 1362 #endif 1363 1364 /* find macros in this token and replace them */ 1365 process_macros (token, finaltoken); 1366 1367 /* Extract arguments */ 1368 if ((argc = parse_line (finaltoken, argv)) == 0) { 1369 rc = -1; /* no command at all */ 1370 continue; 1371 } 1372 1373 /* Look up command in command table */ 1374 if ((cmdtp = find_cmd(argv[0])) == NULL) { 1375 printf ("Unknown command '%s' - try 'help'\n", argv[0]); 1376 rc = -1; /* give up after bad command */ 1377 continue; 1378 } 1379 1380 /* found - check max args */ 1381 if (argc > cmdtp->maxargs) { 1382 cmd_usage(cmdtp); 1383 rc = -1; 1384 continue; 1385 } 1386 1387 #if defined(CONFIG_CMD_BOOTD) 1388 /* avoid "bootd" recursion */ 1389 if (cmdtp->cmd == do_bootd) { 1390 #ifdef DEBUG_PARSER 1391 printf ("[%s]\n", finaltoken); 1392 #endif 1393 if (flag & CMD_FLAG_BOOTD) { 1394 puts ("'bootd' recursion detected\n"); 1395 rc = -1; 1396 continue; 1397 } else { 1398 flag |= CMD_FLAG_BOOTD; 1399 } 1400 } 1401 #endif 1402 1403 /* OK - call function to do the command */ 1404 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) { 1405 rc = -1; 1406 } 1407 1408 repeatable &= cmdtp->repeatable; 1409 1410 /* Did the user stop this? */ 1411 if (had_ctrlc ()) 1412 return -1; /* if stopped then not repeatable */ 1413 } 1414 1415 return rc ? rc : repeatable; 1416 } 1417 1418 /****************************************************************************/ 1419 1420 #if defined(CONFIG_CMD_RUN) 1421 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 1422 { 1423 int i; 1424 1425 if (argc < 2) { 1426 cmd_usage(cmdtp); 1427 return 1; 1428 } 1429 1430 for (i=1; i<argc; ++i) { 1431 char *arg; 1432 1433 if ((arg = getenv (argv[i])) == NULL) { 1434 printf ("## Error: \"%s\" not defined\n", argv[i]); 1435 return 1; 1436 } 1437 #ifndef CONFIG_SYS_HUSH_PARSER 1438 if (run_command (arg, flag) == -1) 1439 return 1; 1440 #else 1441 if (parse_string_outer(arg, 1442 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) 1443 return 1; 1444 #endif 1445 } 1446 return 0; 1447 } 1448 #endif 1449