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 #include <fdtdec.h> 34 #include <malloc.h> 35 #include <version.h> 36 #ifdef CONFIG_MODEM_SUPPORT 37 #include <malloc.h> /* for free() prototype */ 38 #endif 39 40 #ifdef CONFIG_SYS_HUSH_PARSER 41 #include <hush.h> 42 #endif 43 44 #ifdef CONFIG_OF_CONTROL 45 #include <fdtdec.h> 46 #endif 47 48 #ifdef CONFIG_OF_LIBFDT 49 #include <fdt_support.h> 50 #endif /* CONFIG_OF_LIBFDT */ 51 52 #include <post.h> 53 #include <linux/ctype.h> 54 #include <menu.h> 55 56 DECLARE_GLOBAL_DATA_PTR; 57 58 /* 59 * Board-specific Platform code can reimplement show_boot_progress () if needed 60 */ 61 void inline __show_boot_progress (int val) {} 62 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress"))); 63 64 #if defined(CONFIG_UPDATE_TFTP) 65 int update_tftp (ulong addr); 66 #endif /* CONFIG_UPDATE_TFTP */ 67 68 #define MAX_DELAY_STOP_STR 32 69 70 #undef DEBUG_PARSER 71 72 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ 73 74 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen); 75 static const char erase_seq[] = "\b \b"; /* erase sequence */ 76 static const char tab_seq[] = " "; /* used to expand TABs */ 77 78 #ifdef CONFIG_BOOT_RETRY_TIME 79 static uint64_t endtime = 0; /* must be set, default is instant timeout */ 80 static int retry_time = -1; /* -1 so can call readline before main_loop */ 81 #endif 82 83 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 84 85 #ifndef CONFIG_BOOT_RETRY_MIN 86 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME 87 #endif 88 89 #ifdef CONFIG_MODEM_SUPPORT 90 int do_mdm_init = 0; 91 extern void mdm_init(void); /* defined in board.c */ 92 #endif 93 94 /*************************************************************************** 95 * Watch for 'delay' seconds for autoboot stop or autoboot delay string. 96 * returns: 0 - no key string, allow autoboot 1 - got key string, abort 97 */ 98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 99 # if defined(CONFIG_AUTOBOOT_KEYED) 100 #ifndef CONFIG_MENU 101 static inline 102 #endif 103 int abortboot(int bootdelay) 104 { 105 int abort = 0; 106 uint64_t etime = endtick(bootdelay); 107 struct { 108 char* str; 109 u_int len; 110 int retry; 111 } 112 delaykey [] = { 113 { str: getenv ("bootdelaykey"), retry: 1 }, 114 { str: getenv ("bootdelaykey2"), retry: 1 }, 115 { str: getenv ("bootstopkey"), retry: 0 }, 116 { str: getenv ("bootstopkey2"), retry: 0 }, 117 }; 118 119 char presskey [MAX_DELAY_STOP_STR]; 120 u_int presskey_len = 0; 121 u_int presskey_max = 0; 122 u_int i; 123 124 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK 125 if (bootdelay == 0) 126 return 0; 127 #endif 128 129 # ifdef CONFIG_AUTOBOOT_PROMPT 130 printf(CONFIG_AUTOBOOT_PROMPT); 131 # endif 132 133 # ifdef CONFIG_AUTOBOOT_DELAY_STR 134 if (delaykey[0].str == NULL) 135 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR; 136 # endif 137 # ifdef CONFIG_AUTOBOOT_DELAY_STR2 138 if (delaykey[1].str == NULL) 139 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2; 140 # endif 141 # ifdef CONFIG_AUTOBOOT_STOP_STR 142 if (delaykey[2].str == NULL) 143 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR; 144 # endif 145 # ifdef CONFIG_AUTOBOOT_STOP_STR2 146 if (delaykey[3].str == NULL) 147 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2; 148 # endif 149 150 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 151 delaykey[i].len = delaykey[i].str == NULL ? 152 0 : strlen (delaykey[i].str); 153 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ? 154 MAX_DELAY_STOP_STR : delaykey[i].len; 155 156 presskey_max = presskey_max > delaykey[i].len ? 157 presskey_max : delaykey[i].len; 158 159 # if DEBUG_BOOTKEYS 160 printf("%s key:<%s>\n", 161 delaykey[i].retry ? "delay" : "stop", 162 delaykey[i].str ? delaykey[i].str : "NULL"); 163 # endif 164 } 165 166 /* In order to keep up with incoming data, check timeout only 167 * when catch up. 168 */ 169 do { 170 if (tstc()) { 171 if (presskey_len < presskey_max) { 172 presskey [presskey_len ++] = getc(); 173 } 174 else { 175 for (i = 0; i < presskey_max - 1; i ++) 176 presskey [i] = presskey [i + 1]; 177 178 presskey [i] = getc(); 179 } 180 } 181 182 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) { 183 if (delaykey[i].len > 0 && 184 presskey_len >= delaykey[i].len && 185 memcmp (presskey + presskey_len - delaykey[i].len, 186 delaykey[i].str, 187 delaykey[i].len) == 0) { 188 # if DEBUG_BOOTKEYS 189 printf("got %skey\n", 190 delaykey[i].retry ? "delay" : "stop"); 191 # endif 192 193 # ifdef CONFIG_BOOT_RETRY_TIME 194 /* don't retry auto boot */ 195 if (! delaykey[i].retry) 196 retry_time = -1; 197 # endif 198 abort = 1; 199 } 200 } 201 } while (!abort && get_ticks() <= etime); 202 203 # if DEBUG_BOOTKEYS 204 if (!abort) 205 puts("key timeout\n"); 206 # endif 207 208 #ifdef CONFIG_SILENT_CONSOLE 209 if (abort) 210 gd->flags &= ~GD_FLG_SILENT; 211 #endif 212 213 return abort; 214 } 215 216 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */ 217 218 #ifdef CONFIG_MENUKEY 219 static int menukey = 0; 220 #endif 221 222 #ifndef CONFIG_MENU 223 static inline 224 #endif 225 int abortboot(int bootdelay) 226 { 227 int abort = 0; 228 229 #ifdef CONFIG_MENUPROMPT 230 printf(CONFIG_MENUPROMPT); 231 #else 232 if (bootdelay >= 0) 233 printf("Hit any key to stop autoboot: %2d ", bootdelay); 234 #endif 235 236 #if defined CONFIG_ZERO_BOOTDELAY_CHECK 237 /* 238 * Check if key already pressed 239 * Don't check if bootdelay < 0 240 */ 241 if (bootdelay >= 0) { 242 if (tstc()) { /* we got a key press */ 243 (void) getc(); /* consume input */ 244 puts ("\b\b\b 0"); 245 abort = 1; /* don't auto boot */ 246 } 247 } 248 #endif 249 250 while ((bootdelay > 0) && (!abort)) { 251 int i; 252 253 --bootdelay; 254 /* delay 100 * 10ms */ 255 for (i=0; !abort && i<100; ++i) { 256 if (tstc()) { /* we got a key press */ 257 abort = 1; /* don't auto boot */ 258 bootdelay = 0; /* no more delay */ 259 # ifdef CONFIG_MENUKEY 260 menukey = getc(); 261 # else 262 (void) getc(); /* consume input */ 263 # endif 264 break; 265 } 266 udelay(10000); 267 } 268 269 printf("\b\b\b%2d ", bootdelay); 270 } 271 272 putc('\n'); 273 274 #ifdef CONFIG_SILENT_CONSOLE 275 if (abort) 276 gd->flags &= ~GD_FLG_SILENT; 277 #endif 278 279 return abort; 280 } 281 # endif /* CONFIG_AUTOBOOT_KEYED */ 282 #endif /* CONFIG_BOOTDELAY >= 0 */ 283 284 /* 285 * Runs the given boot command securely. Specifically: 286 * - Doesn't run the command with the shell (run_command or parse_string_outer), 287 * since that's a lot of code surface that an attacker might exploit. 288 * Because of this, we don't do any argument parsing--the secure boot command 289 * has to be a full-fledged u-boot command. 290 * - Doesn't check for keypresses before booting, since that could be a 291 * security hole; also disables Ctrl-C. 292 * - Doesn't allow the command to return. 293 * 294 * Upon any failures, this function will drop into an infinite loop after 295 * printing the error message to console. 296 */ 297 298 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) && \ 299 defined(CONFIG_OF_CONTROL) 300 static void secure_boot_cmd(char *cmd) 301 { 302 cmd_tbl_t *cmdtp; 303 int rc; 304 305 if (!cmd) { 306 printf("## Error: Secure boot command not specified\n"); 307 goto err; 308 } 309 310 /* Disable Ctrl-C just in case some command is used that checks it. */ 311 disable_ctrlc(1); 312 313 /* Find the command directly. */ 314 cmdtp = find_cmd(cmd); 315 if (!cmdtp) { 316 printf("## Error: \"%s\" not defined\n", cmd); 317 goto err; 318 } 319 320 /* Run the command, forcing no flags and faking argc and argv. */ 321 rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd); 322 323 /* Shouldn't ever return from boot command. */ 324 printf("## Error: \"%s\" returned (code %d)\n", cmd, rc); 325 326 err: 327 /* 328 * Not a whole lot to do here. Rebooting won't help much, since we'll 329 * just end up right back here. Just loop. 330 */ 331 hang(); 332 } 333 334 static void process_fdt_options(const void *blob) 335 { 336 ulong addr; 337 338 /* Add an env variable to point to a kernel payload, if available */ 339 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0); 340 if (addr) 341 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 342 343 /* Add an env variable to point to a root disk, if available */ 344 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0); 345 if (addr) 346 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr)); 347 } 348 #endif /* CONFIG_OF_CONTROL */ 349 350 351 /****************************************************************************/ 352 353 void main_loop (void) 354 { 355 #ifndef CONFIG_SYS_HUSH_PARSER 356 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, }; 357 int len; 358 int rc = 1; 359 int flag; 360 #endif 361 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) && \ 362 defined(CONFIG_OF_CONTROL) 363 char *env; 364 #endif 365 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 366 char *s; 367 int bootdelay; 368 #endif 369 #ifdef CONFIG_PREBOOT 370 char *p; 371 #endif 372 #ifdef CONFIG_BOOTCOUNT_LIMIT 373 unsigned long bootcount = 0; 374 unsigned long bootlimit = 0; 375 char *bcs; 376 char bcs_set[16]; 377 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 378 379 #ifdef CONFIG_BOOTCOUNT_LIMIT 380 bootcount = bootcount_load(); 381 bootcount++; 382 bootcount_store (bootcount); 383 sprintf (bcs_set, "%lu", bootcount); 384 setenv ("bootcount", bcs_set); 385 bcs = getenv ("bootlimit"); 386 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0; 387 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 388 389 #ifdef CONFIG_MODEM_SUPPORT 390 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init); 391 if (do_mdm_init) { 392 char *str = strdup(getenv("mdm_cmd")); 393 setenv ("preboot", str); /* set or delete definition */ 394 if (str != NULL) 395 free (str); 396 mdm_init(); /* wait for modem connection */ 397 } 398 #endif /* CONFIG_MODEM_SUPPORT */ 399 400 #ifdef CONFIG_VERSION_VARIABLE 401 { 402 setenv ("ver", version_string); /* set version variable */ 403 } 404 #endif /* CONFIG_VERSION_VARIABLE */ 405 406 #ifdef CONFIG_SYS_HUSH_PARSER 407 u_boot_hush_start (); 408 #endif 409 410 #if defined(CONFIG_HUSH_INIT_VAR) 411 hush_init_var (); 412 #endif 413 414 #ifdef CONFIG_PREBOOT 415 if ((p = getenv ("preboot")) != NULL) { 416 # ifdef CONFIG_AUTOBOOT_KEYED 417 int prev = disable_ctrlc(1); /* disable Control C checking */ 418 # endif 419 420 run_command_list(p, -1, 0); 421 422 # ifdef CONFIG_AUTOBOOT_KEYED 423 disable_ctrlc(prev); /* restore Control C checking */ 424 # endif 425 } 426 #endif /* CONFIG_PREBOOT */ 427 428 #if defined(CONFIG_UPDATE_TFTP) 429 update_tftp (0UL); 430 #endif /* CONFIG_UPDATE_TFTP */ 431 432 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0) 433 s = getenv ("bootdelay"); 434 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY; 435 436 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay); 437 438 #if defined(CONFIG_MENU_SHOW) 439 bootdelay = menu_show(bootdelay); 440 #endif 441 # ifdef CONFIG_BOOT_RETRY_TIME 442 init_cmd_timeout (); 443 # endif /* CONFIG_BOOT_RETRY_TIME */ 444 445 #ifdef CONFIG_POST 446 if (gd->flags & GD_FLG_POSTFAIL) { 447 s = getenv("failbootcmd"); 448 } 449 else 450 #endif /* CONFIG_POST */ 451 #ifdef CONFIG_BOOTCOUNT_LIMIT 452 if (bootlimit && (bootcount > bootlimit)) { 453 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n", 454 (unsigned)bootlimit); 455 s = getenv ("altbootcmd"); 456 } 457 else 458 #endif /* CONFIG_BOOTCOUNT_LIMIT */ 459 s = getenv ("bootcmd"); 460 #ifdef CONFIG_OF_CONTROL 461 /* Allow the fdt to override the boot command */ 462 env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd"); 463 if (env) 464 s = env; 465 466 process_fdt_options(gd->fdt_blob); 467 468 /* 469 * If the bootsecure option was chosen, use secure_boot_cmd(). 470 * Always use 'env' in this case, since bootsecure requres that the 471 * bootcmd was specified in the FDT too. 472 */ 473 if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0)) 474 secure_boot_cmd(env); 475 476 #endif /* CONFIG_OF_CONTROL */ 477 478 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>"); 479 480 if (bootdelay != -1 && s && !abortboot(bootdelay)) { 481 # ifdef CONFIG_AUTOBOOT_KEYED 482 int prev = disable_ctrlc(1); /* disable Control C checking */ 483 # endif 484 485 run_command_list(s, -1, 0); 486 487 # ifdef CONFIG_AUTOBOOT_KEYED 488 disable_ctrlc(prev); /* restore Control C checking */ 489 # endif 490 } 491 492 # ifdef CONFIG_MENUKEY 493 if (menukey == CONFIG_MENUKEY) { 494 s = getenv("menucmd"); 495 if (s) 496 run_command_list(s, -1, 0); 497 } 498 #endif /* CONFIG_MENUKEY */ 499 #endif /* CONFIG_BOOTDELAY */ 500 501 #if defined CONFIG_OF_CONTROL 502 set_working_fdt_addr((void *)gd->fdt_blob); 503 #endif /* CONFIG_OF_CONTROL */ 504 505 /* 506 * Main Loop for Monitor Command Processing 507 */ 508 #ifdef CONFIG_SYS_HUSH_PARSER 509 parse_file_outer(); 510 /* This point is never reached */ 511 for (;;); 512 #else 513 for (;;) { 514 #ifdef CONFIG_BOOT_RETRY_TIME 515 if (rc >= 0) { 516 /* Saw enough of a valid command to 517 * restart the timeout. 518 */ 519 reset_cmd_timeout(); 520 } 521 #endif 522 len = readline (CONFIG_SYS_PROMPT); 523 524 flag = 0; /* assume no special flags for now */ 525 if (len > 0) 526 strcpy (lastcommand, console_buffer); 527 else if (len == 0) 528 flag |= CMD_FLAG_REPEAT; 529 #ifdef CONFIG_BOOT_RETRY_TIME 530 else if (len == -2) { 531 /* -2 means timed out, retry autoboot 532 */ 533 puts ("\nTimed out waiting for command\n"); 534 # ifdef CONFIG_RESET_TO_RETRY 535 /* Reinit board to run initialization code again */ 536 do_reset (NULL, 0, 0, NULL); 537 # else 538 return; /* retry autoboot */ 539 # endif 540 } 541 #endif 542 543 if (len == -1) 544 puts ("<INTERRUPT>\n"); 545 else 546 rc = run_command(lastcommand, flag); 547 548 if (rc <= 0) { 549 /* invalid command or not repeatable, forget it */ 550 lastcommand[0] = 0; 551 } 552 } 553 #endif /*CONFIG_SYS_HUSH_PARSER*/ 554 } 555 556 #ifdef CONFIG_BOOT_RETRY_TIME 557 /*************************************************************************** 558 * initialize command line timeout 559 */ 560 void init_cmd_timeout(void) 561 { 562 char *s = getenv ("bootretry"); 563 564 if (s != NULL) 565 retry_time = (int)simple_strtol(s, NULL, 10); 566 else 567 retry_time = CONFIG_BOOT_RETRY_TIME; 568 569 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN) 570 retry_time = CONFIG_BOOT_RETRY_MIN; 571 } 572 573 /*************************************************************************** 574 * reset command line timeout to retry_time seconds 575 */ 576 void reset_cmd_timeout(void) 577 { 578 endtime = endtick(retry_time); 579 } 580 #endif 581 582 #ifdef CONFIG_CMDLINE_EDITING 583 584 /* 585 * cmdline-editing related codes from vivi. 586 * Author: Janghoon Lyu <nandy@mizi.com> 587 */ 588 589 #define putnstr(str,n) do { \ 590 printf ("%.*s", (int)n, str); \ 591 } while (0) 592 593 #define CTL_CH(c) ((c) - 'a' + 1) 594 #define CTL_BACKSPACE ('\b') 595 #define DEL ((char)255) 596 #define DEL7 ((char)127) 597 #define CREAD_HIST_CHAR ('!') 598 599 #define getcmd_putch(ch) putc(ch) 600 #define getcmd_getch() getc() 601 #define getcmd_cbeep() getcmd_putch('\a') 602 603 #define HIST_MAX 20 604 #define HIST_SIZE CONFIG_SYS_CBSIZE 605 606 static int hist_max; 607 static int hist_add_idx; 608 static int hist_cur = -1; 609 static unsigned hist_num; 610 611 static char *hist_list[HIST_MAX]; 612 static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ 613 614 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) 615 616 static void hist_init(void) 617 { 618 int i; 619 620 hist_max = 0; 621 hist_add_idx = 0; 622 hist_cur = -1; 623 hist_num = 0; 624 625 for (i = 0; i < HIST_MAX; i++) { 626 hist_list[i] = hist_lines[i]; 627 hist_list[i][0] = '\0'; 628 } 629 } 630 631 static void cread_add_to_hist(char *line) 632 { 633 strcpy(hist_list[hist_add_idx], line); 634 635 if (++hist_add_idx >= HIST_MAX) 636 hist_add_idx = 0; 637 638 if (hist_add_idx > hist_max) 639 hist_max = hist_add_idx; 640 641 hist_num++; 642 } 643 644 static char* hist_prev(void) 645 { 646 char *ret; 647 int old_cur; 648 649 if (hist_cur < 0) 650 return NULL; 651 652 old_cur = hist_cur; 653 if (--hist_cur < 0) 654 hist_cur = hist_max; 655 656 if (hist_cur == hist_add_idx) { 657 hist_cur = old_cur; 658 ret = NULL; 659 } else 660 ret = hist_list[hist_cur]; 661 662 return (ret); 663 } 664 665 static char* hist_next(void) 666 { 667 char *ret; 668 669 if (hist_cur < 0) 670 return NULL; 671 672 if (hist_cur == hist_add_idx) 673 return NULL; 674 675 if (++hist_cur > hist_max) 676 hist_cur = 0; 677 678 if (hist_cur == hist_add_idx) { 679 ret = ""; 680 } else 681 ret = hist_list[hist_cur]; 682 683 return (ret); 684 } 685 686 #ifndef CONFIG_CMDLINE_EDITING 687 static void cread_print_hist_list(void) 688 { 689 int i; 690 unsigned long n; 691 692 n = hist_num - hist_max; 693 694 i = hist_add_idx + 1; 695 while (1) { 696 if (i > hist_max) 697 i = 0; 698 if (i == hist_add_idx) 699 break; 700 printf("%s\n", hist_list[i]); 701 n++; 702 i++; 703 } 704 } 705 #endif /* CONFIG_CMDLINE_EDITING */ 706 707 #define BEGINNING_OF_LINE() { \ 708 while (num) { \ 709 getcmd_putch(CTL_BACKSPACE); \ 710 num--; \ 711 } \ 712 } 713 714 #define ERASE_TO_EOL() { \ 715 if (num < eol_num) { \ 716 printf("%*s", (int)(eol_num - num), ""); \ 717 do { \ 718 getcmd_putch(CTL_BACKSPACE); \ 719 } while (--eol_num > num); \ 720 } \ 721 } 722 723 #define REFRESH_TO_EOL() { \ 724 if (num < eol_num) { \ 725 wlen = eol_num - num; \ 726 putnstr(buf + num, wlen); \ 727 num = eol_num; \ 728 } \ 729 } 730 731 static void cread_add_char(char ichar, int insert, unsigned long *num, 732 unsigned long *eol_num, char *buf, unsigned long len) 733 { 734 unsigned long wlen; 735 736 /* room ??? */ 737 if (insert || *num == *eol_num) { 738 if (*eol_num > len - 1) { 739 getcmd_cbeep(); 740 return; 741 } 742 (*eol_num)++; 743 } 744 745 if (insert) { 746 wlen = *eol_num - *num; 747 if (wlen > 1) { 748 memmove(&buf[*num+1], &buf[*num], wlen-1); 749 } 750 751 buf[*num] = ichar; 752 putnstr(buf + *num, wlen); 753 (*num)++; 754 while (--wlen) { 755 getcmd_putch(CTL_BACKSPACE); 756 } 757 } else { 758 /* echo the character */ 759 wlen = 1; 760 buf[*num] = ichar; 761 putnstr(buf + *num, wlen); 762 (*num)++; 763 } 764 } 765 766 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num, 767 unsigned long *eol_num, char *buf, unsigned long len) 768 { 769 while (strsize--) { 770 cread_add_char(*str, insert, num, eol_num, buf, len); 771 str++; 772 } 773 } 774 775 static int cread_line(const char *const prompt, char *buf, unsigned int *len, 776 int timeout) 777 { 778 unsigned long num = 0; 779 unsigned long eol_num = 0; 780 unsigned long wlen; 781 char ichar; 782 int insert = 1; 783 int esc_len = 0; 784 char esc_save[8]; 785 int init_len = strlen(buf); 786 int first = 1; 787 788 if (init_len) 789 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); 790 791 while (1) { 792 #ifdef CONFIG_BOOT_RETRY_TIME 793 while (!tstc()) { /* while no incoming data */ 794 if (retry_time >= 0 && get_ticks() > endtime) 795 return (-2); /* timed out */ 796 WATCHDOG_RESET(); 797 } 798 #endif 799 if (first && timeout) { 800 uint64_t etime = endtick(timeout); 801 802 while (!tstc()) { /* while no incoming data */ 803 if (get_ticks() >= etime) 804 return -2; /* timed out */ 805 WATCHDOG_RESET(); 806 } 807 first = 0; 808 } 809 810 ichar = getcmd_getch(); 811 812 if ((ichar == '\n') || (ichar == '\r')) { 813 putc('\n'); 814 break; 815 } 816 817 /* 818 * handle standard linux xterm esc sequences for arrow key, etc. 819 */ 820 if (esc_len != 0) { 821 if (esc_len == 1) { 822 if (ichar == '[') { 823 esc_save[esc_len] = ichar; 824 esc_len = 2; 825 } else { 826 cread_add_str(esc_save, esc_len, insert, 827 &num, &eol_num, buf, *len); 828 esc_len = 0; 829 } 830 continue; 831 } 832 833 switch (ichar) { 834 835 case 'D': /* <- key */ 836 ichar = CTL_CH('b'); 837 esc_len = 0; 838 break; 839 case 'C': /* -> key */ 840 ichar = CTL_CH('f'); 841 esc_len = 0; 842 break; /* pass off to ^F handler */ 843 case 'H': /* Home key */ 844 ichar = CTL_CH('a'); 845 esc_len = 0; 846 break; /* pass off to ^A handler */ 847 case 'A': /* up arrow */ 848 ichar = CTL_CH('p'); 849 esc_len = 0; 850 break; /* pass off to ^P handler */ 851 case 'B': /* down arrow */ 852 ichar = CTL_CH('n'); 853 esc_len = 0; 854 break; /* pass off to ^N handler */ 855 default: 856 esc_save[esc_len++] = ichar; 857 cread_add_str(esc_save, esc_len, insert, 858 &num, &eol_num, buf, *len); 859 esc_len = 0; 860 continue; 861 } 862 } 863 864 switch (ichar) { 865 case 0x1b: 866 if (esc_len == 0) { 867 esc_save[esc_len] = ichar; 868 esc_len = 1; 869 } else { 870 puts("impossible condition #876\n"); 871 esc_len = 0; 872 } 873 break; 874 875 case CTL_CH('a'): 876 BEGINNING_OF_LINE(); 877 break; 878 case CTL_CH('c'): /* ^C - break */ 879 *buf = '\0'; /* discard input */ 880 return (-1); 881 case CTL_CH('f'): 882 if (num < eol_num) { 883 getcmd_putch(buf[num]); 884 num++; 885 } 886 break; 887 case CTL_CH('b'): 888 if (num) { 889 getcmd_putch(CTL_BACKSPACE); 890 num--; 891 } 892 break; 893 case CTL_CH('d'): 894 if (num < eol_num) { 895 wlen = eol_num - num - 1; 896 if (wlen) { 897 memmove(&buf[num], &buf[num+1], wlen); 898 putnstr(buf + num, wlen); 899 } 900 901 getcmd_putch(' '); 902 do { 903 getcmd_putch(CTL_BACKSPACE); 904 } while (wlen--); 905 eol_num--; 906 } 907 break; 908 case CTL_CH('k'): 909 ERASE_TO_EOL(); 910 break; 911 case CTL_CH('e'): 912 REFRESH_TO_EOL(); 913 break; 914 case CTL_CH('o'): 915 insert = !insert; 916 break; 917 case CTL_CH('x'): 918 case CTL_CH('u'): 919 BEGINNING_OF_LINE(); 920 ERASE_TO_EOL(); 921 break; 922 case DEL: 923 case DEL7: 924 case 8: 925 if (num) { 926 wlen = eol_num - num; 927 num--; 928 memmove(&buf[num], &buf[num+1], wlen); 929 getcmd_putch(CTL_BACKSPACE); 930 putnstr(buf + num, wlen); 931 getcmd_putch(' '); 932 do { 933 getcmd_putch(CTL_BACKSPACE); 934 } while (wlen--); 935 eol_num--; 936 } 937 break; 938 case CTL_CH('p'): 939 case CTL_CH('n'): 940 { 941 char * hline; 942 943 esc_len = 0; 944 945 if (ichar == CTL_CH('p')) 946 hline = hist_prev(); 947 else 948 hline = hist_next(); 949 950 if (!hline) { 951 getcmd_cbeep(); 952 continue; 953 } 954 955 /* nuke the current line */ 956 /* first, go home */ 957 BEGINNING_OF_LINE(); 958 959 /* erase to end of line */ 960 ERASE_TO_EOL(); 961 962 /* copy new line into place and display */ 963 strcpy(buf, hline); 964 eol_num = strlen(buf); 965 REFRESH_TO_EOL(); 966 continue; 967 } 968 #ifdef CONFIG_AUTO_COMPLETE 969 case '\t': { 970 int num2, col; 971 972 /* do not autocomplete when in the middle */ 973 if (num < eol_num) { 974 getcmd_cbeep(); 975 break; 976 } 977 978 buf[num] = '\0'; 979 col = strlen(prompt) + eol_num; 980 num2 = num; 981 if (cmd_auto_complete(prompt, buf, &num2, &col)) { 982 col = num2 - num; 983 num += col; 984 eol_num += col; 985 } 986 break; 987 } 988 #endif 989 default: 990 cread_add_char(ichar, insert, &num, &eol_num, buf, *len); 991 break; 992 } 993 } 994 *len = eol_num; 995 buf[eol_num] = '\0'; /* lose the newline */ 996 997 if (buf[0] && buf[0] != CREAD_HIST_CHAR) 998 cread_add_to_hist(buf); 999 hist_cur = hist_add_idx; 1000 1001 return 0; 1002 } 1003 1004 #endif /* CONFIG_CMDLINE_EDITING */ 1005 1006 /****************************************************************************/ 1007 1008 /* 1009 * Prompt for input and read a line. 1010 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 1011 * time out when time goes past endtime (timebase time in ticks). 1012 * Return: number of read characters 1013 * -1 if break 1014 * -2 if timed out 1015 */ 1016 int readline (const char *const prompt) 1017 { 1018 /* 1019 * If console_buffer isn't 0-length the user will be prompted to modify 1020 * it instead of entering it from scratch as desired. 1021 */ 1022 console_buffer[0] = '\0'; 1023 1024 return readline_into_buffer(prompt, console_buffer, 0); 1025 } 1026 1027 1028 int readline_into_buffer(const char *const prompt, char *buffer, int timeout) 1029 { 1030 char *p = buffer; 1031 #ifdef CONFIG_CMDLINE_EDITING 1032 unsigned int len = CONFIG_SYS_CBSIZE; 1033 int rc; 1034 static int initted = 0; 1035 1036 /* 1037 * History uses a global array which is not 1038 * writable until after relocation to RAM. 1039 * Revert to non-history version if still 1040 * running from flash. 1041 */ 1042 if (gd->flags & GD_FLG_RELOC) { 1043 if (!initted) { 1044 hist_init(); 1045 initted = 1; 1046 } 1047 1048 if (prompt) 1049 puts (prompt); 1050 1051 rc = cread_line(prompt, p, &len, timeout); 1052 return rc < 0 ? rc : len; 1053 1054 } else { 1055 #endif /* CONFIG_CMDLINE_EDITING */ 1056 char * p_buf = p; 1057 int n = 0; /* buffer index */ 1058 int plen = 0; /* prompt length */ 1059 int col; /* output column cnt */ 1060 char c; 1061 1062 /* print prompt */ 1063 if (prompt) { 1064 plen = strlen (prompt); 1065 puts (prompt); 1066 } 1067 col = plen; 1068 1069 for (;;) { 1070 #ifdef CONFIG_BOOT_RETRY_TIME 1071 while (!tstc()) { /* while no incoming data */ 1072 if (retry_time >= 0 && get_ticks() > endtime) 1073 return (-2); /* timed out */ 1074 WATCHDOG_RESET(); 1075 } 1076 #endif 1077 WATCHDOG_RESET(); /* Trigger watchdog, if needed */ 1078 1079 #ifdef CONFIG_SHOW_ACTIVITY 1080 while (!tstc()) { 1081 show_activity(0); 1082 WATCHDOG_RESET(); 1083 } 1084 #endif 1085 c = getc(); 1086 1087 /* 1088 * Special character handling 1089 */ 1090 switch (c) { 1091 case '\r': /* Enter */ 1092 case '\n': 1093 *p = '\0'; 1094 puts ("\r\n"); 1095 return (p - p_buf); 1096 1097 case '\0': /* nul */ 1098 continue; 1099 1100 case 0x03: /* ^C - break */ 1101 p_buf[0] = '\0'; /* discard input */ 1102 return (-1); 1103 1104 case 0x15: /* ^U - erase line */ 1105 while (col > plen) { 1106 puts (erase_seq); 1107 --col; 1108 } 1109 p = p_buf; 1110 n = 0; 1111 continue; 1112 1113 case 0x17: /* ^W - erase word */ 1114 p=delete_char(p_buf, p, &col, &n, plen); 1115 while ((n > 0) && (*p != ' ')) { 1116 p=delete_char(p_buf, p, &col, &n, plen); 1117 } 1118 continue; 1119 1120 case 0x08: /* ^H - backspace */ 1121 case 0x7F: /* DEL - backspace */ 1122 p=delete_char(p_buf, p, &col, &n, plen); 1123 continue; 1124 1125 default: 1126 /* 1127 * Must be a normal character then 1128 */ 1129 if (n < CONFIG_SYS_CBSIZE-2) { 1130 if (c == '\t') { /* expand TABs */ 1131 #ifdef CONFIG_AUTO_COMPLETE 1132 /* if auto completion triggered just continue */ 1133 *p = '\0'; 1134 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) { 1135 p = p_buf + n; /* reset */ 1136 continue; 1137 } 1138 #endif 1139 puts (tab_seq+(col&07)); 1140 col += 8 - (col&07); 1141 } else { 1142 ++col; /* echo input */ 1143 putc (c); 1144 } 1145 *p++ = c; 1146 ++n; 1147 } else { /* Buffer full */ 1148 putc ('\a'); 1149 } 1150 } 1151 } 1152 #ifdef CONFIG_CMDLINE_EDITING 1153 } 1154 #endif 1155 } 1156 1157 /****************************************************************************/ 1158 1159 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen) 1160 { 1161 char *s; 1162 1163 if (*np == 0) { 1164 return (p); 1165 } 1166 1167 if (*(--p) == '\t') { /* will retype the whole line */ 1168 while (*colp > plen) { 1169 puts (erase_seq); 1170 (*colp)--; 1171 } 1172 for (s=buffer; s<p; ++s) { 1173 if (*s == '\t') { 1174 puts (tab_seq+((*colp) & 07)); 1175 *colp += 8 - ((*colp) & 07); 1176 } else { 1177 ++(*colp); 1178 putc (*s); 1179 } 1180 } 1181 } else { 1182 puts (erase_seq); 1183 (*colp)--; 1184 } 1185 (*np)--; 1186 return (p); 1187 } 1188 1189 /****************************************************************************/ 1190 1191 int parse_line (char *line, char *argv[]) 1192 { 1193 int nargs = 0; 1194 1195 #ifdef DEBUG_PARSER 1196 printf ("parse_line: \"%s\"\n", line); 1197 #endif 1198 while (nargs < CONFIG_SYS_MAXARGS) { 1199 1200 /* skip any white space */ 1201 while (isblank(*line)) 1202 ++line; 1203 1204 if (*line == '\0') { /* end of line, no more args */ 1205 argv[nargs] = NULL; 1206 #ifdef DEBUG_PARSER 1207 printf ("parse_line: nargs=%d\n", nargs); 1208 #endif 1209 return (nargs); 1210 } 1211 1212 argv[nargs++] = line; /* begin of argument string */ 1213 1214 /* find end of string */ 1215 while (*line && !isblank(*line)) 1216 ++line; 1217 1218 if (*line == '\0') { /* end of line, no more args */ 1219 argv[nargs] = NULL; 1220 #ifdef DEBUG_PARSER 1221 printf ("parse_line: nargs=%d\n", nargs); 1222 #endif 1223 return (nargs); 1224 } 1225 1226 *line++ = '\0'; /* terminate current arg */ 1227 } 1228 1229 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS); 1230 1231 #ifdef DEBUG_PARSER 1232 printf ("parse_line: nargs=%d\n", nargs); 1233 #endif 1234 return (nargs); 1235 } 1236 1237 /****************************************************************************/ 1238 1239 #ifndef CONFIG_SYS_HUSH_PARSER 1240 static void process_macros (const char *input, char *output) 1241 { 1242 char c, prev; 1243 const char *varname_start = NULL; 1244 int inputcnt = strlen (input); 1245 int outputcnt = CONFIG_SYS_CBSIZE; 1246 int state = 0; /* 0 = waiting for '$' */ 1247 1248 /* 1 = waiting for '(' or '{' */ 1249 /* 2 = waiting for ')' or '}' */ 1250 /* 3 = waiting for ''' */ 1251 #ifdef DEBUG_PARSER 1252 char *output_start = output; 1253 1254 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input), 1255 input); 1256 #endif 1257 1258 prev = '\0'; /* previous character */ 1259 1260 while (inputcnt && outputcnt) { 1261 c = *input++; 1262 inputcnt--; 1263 1264 if (state != 3) { 1265 /* remove one level of escape characters */ 1266 if ((c == '\\') && (prev != '\\')) { 1267 if (inputcnt-- == 0) 1268 break; 1269 prev = c; 1270 c = *input++; 1271 } 1272 } 1273 1274 switch (state) { 1275 case 0: /* Waiting for (unescaped) $ */ 1276 if ((c == '\'') && (prev != '\\')) { 1277 state = 3; 1278 break; 1279 } 1280 if ((c == '$') && (prev != '\\')) { 1281 state++; 1282 } else { 1283 *(output++) = c; 1284 outputcnt--; 1285 } 1286 break; 1287 case 1: /* Waiting for ( */ 1288 if (c == '(' || c == '{') { 1289 state++; 1290 varname_start = input; 1291 } else { 1292 state = 0; 1293 *(output++) = '$'; 1294 outputcnt--; 1295 1296 if (outputcnt) { 1297 *(output++) = c; 1298 outputcnt--; 1299 } 1300 } 1301 break; 1302 case 2: /* Waiting for ) */ 1303 if (c == ')' || c == '}') { 1304 int i; 1305 char envname[CONFIG_SYS_CBSIZE], *envval; 1306 int envcnt = input - varname_start - 1; /* Varname # of chars */ 1307 1308 /* Get the varname */ 1309 for (i = 0; i < envcnt; i++) { 1310 envname[i] = varname_start[i]; 1311 } 1312 envname[i] = 0; 1313 1314 /* Get its value */ 1315 envval = getenv (envname); 1316 1317 /* Copy into the line if it exists */ 1318 if (envval != NULL) 1319 while ((*envval) && outputcnt) { 1320 *(output++) = *(envval++); 1321 outputcnt--; 1322 } 1323 /* Look for another '$' */ 1324 state = 0; 1325 } 1326 break; 1327 case 3: /* Waiting for ' */ 1328 if ((c == '\'') && (prev != '\\')) { 1329 state = 0; 1330 } else { 1331 *(output++) = c; 1332 outputcnt--; 1333 } 1334 break; 1335 } 1336 prev = c; 1337 } 1338 1339 if (outputcnt) 1340 *output = 0; 1341 else 1342 *(output - 1) = 0; 1343 1344 #ifdef DEBUG_PARSER 1345 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n", 1346 strlen (output_start), output_start); 1347 #endif 1348 } 1349 1350 /**************************************************************************** 1351 * returns: 1352 * 1 - command executed, repeatable 1353 * 0 - command executed but not repeatable, interrupted commands are 1354 * always considered not repeatable 1355 * -1 - not executed (unrecognized, bootd recursion or too many args) 1356 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 1357 * considered unrecognized) 1358 * 1359 * WARNING: 1360 * 1361 * We must create a temporary copy of the command since the command we get 1362 * may be the result from getenv(), which returns a pointer directly to 1363 * the environment data, which may change magicly when the command we run 1364 * creates or modifies environment variables (like "bootp" does). 1365 */ 1366 static int builtin_run_command(const char *cmd, int flag) 1367 { 1368 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */ 1369 char *token; /* start of token in cmdbuf */ 1370 char *sep; /* end of token (separator) in cmdbuf */ 1371 char finaltoken[CONFIG_SYS_CBSIZE]; 1372 char *str = cmdbuf; 1373 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */ 1374 int argc, inquotes; 1375 int repeatable = 1; 1376 int rc = 0; 1377 1378 #ifdef DEBUG_PARSER 1379 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd); 1380 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */ 1381 puts ("\"\n"); 1382 #endif 1383 1384 clear_ctrlc(); /* forget any previous Control C */ 1385 1386 if (!cmd || !*cmd) { 1387 return -1; /* empty command */ 1388 } 1389 1390 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) { 1391 puts ("## Command too long!\n"); 1392 return -1; 1393 } 1394 1395 strcpy (cmdbuf, cmd); 1396 1397 /* Process separators and check for invalid 1398 * repeatable commands 1399 */ 1400 1401 #ifdef DEBUG_PARSER 1402 printf ("[PROCESS_SEPARATORS] %s\n", cmd); 1403 #endif 1404 while (*str) { 1405 1406 /* 1407 * Find separator, or string end 1408 * Allow simple escape of ';' by writing "\;" 1409 */ 1410 for (inquotes = 0, sep = str; *sep; sep++) { 1411 if ((*sep=='\'') && 1412 (*(sep-1) != '\\')) 1413 inquotes=!inquotes; 1414 1415 if (!inquotes && 1416 (*sep == ';') && /* separator */ 1417 ( sep != str) && /* past string start */ 1418 (*(sep-1) != '\\')) /* and NOT escaped */ 1419 break; 1420 } 1421 1422 /* 1423 * Limit the token to data between separators 1424 */ 1425 token = str; 1426 if (*sep) { 1427 str = sep + 1; /* start of command for next pass */ 1428 *sep = '\0'; 1429 } 1430 else 1431 str = sep; /* no more commands for next pass */ 1432 #ifdef DEBUG_PARSER 1433 printf ("token: \"%s\"\n", token); 1434 #endif 1435 1436 /* find macros in this token and replace them */ 1437 process_macros (token, finaltoken); 1438 1439 /* Extract arguments */ 1440 if ((argc = parse_line (finaltoken, argv)) == 0) { 1441 rc = -1; /* no command at all */ 1442 continue; 1443 } 1444 1445 if (cmd_process(flag, argc, argv, &repeatable)) 1446 rc = -1; 1447 1448 /* Did the user stop this? */ 1449 if (had_ctrlc ()) 1450 return -1; /* if stopped then not repeatable */ 1451 } 1452 1453 return rc ? rc : repeatable; 1454 } 1455 #endif 1456 1457 /* 1458 * Run a command using the selected parser. 1459 * 1460 * @param cmd Command to run 1461 * @param flag Execution flags (CMD_FLAG_...) 1462 * @return 0 on success, or != 0 on error. 1463 */ 1464 int run_command(const char *cmd, int flag) 1465 { 1466 #ifndef CONFIG_SYS_HUSH_PARSER 1467 /* 1468 * builtin_run_command can return 0 or 1 for success, so clean up 1469 * its result. 1470 */ 1471 if (builtin_run_command(cmd, flag) == -1) 1472 return 1; 1473 1474 return 0; 1475 #else 1476 return parse_string_outer(cmd, 1477 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP); 1478 #endif 1479 } 1480 1481 #ifndef CONFIG_SYS_HUSH_PARSER 1482 /** 1483 * Execute a list of command separated by ; or \n using the built-in parser. 1484 * 1485 * This function cannot take a const char * for the command, since if it 1486 * finds newlines in the string, it replaces them with \0. 1487 * 1488 * @param cmd String containing list of commands 1489 * @param flag Execution flags (CMD_FLAG_...) 1490 * @return 0 on success, or != 0 on error. 1491 */ 1492 static int builtin_run_command_list(char *cmd, int flag) 1493 { 1494 char *line, *next; 1495 int rcode = 0; 1496 1497 /* 1498 * Break into individual lines, and execute each line; terminate on 1499 * error. 1500 */ 1501 line = next = cmd; 1502 while (*next) { 1503 if (*next == '\n') { 1504 *next = '\0'; 1505 /* run only non-empty commands */ 1506 if (*line) { 1507 debug("** exec: \"%s\"\n", line); 1508 if (builtin_run_command(line, 0) < 0) { 1509 rcode = 1; 1510 break; 1511 } 1512 } 1513 line = next + 1; 1514 } 1515 ++next; 1516 } 1517 if (rcode == 0 && *line) 1518 rcode = (builtin_run_command(line, 0) >= 0); 1519 1520 return rcode; 1521 } 1522 #endif 1523 1524 int run_command_list(const char *cmd, int len, int flag) 1525 { 1526 int need_buff = 1; 1527 char *buff = (char *)cmd; /* cast away const */ 1528 int rcode = 0; 1529 1530 if (len == -1) { 1531 len = strlen(cmd); 1532 #ifdef CONFIG_SYS_HUSH_PARSER 1533 /* hush will never change our string */ 1534 need_buff = 0; 1535 #else 1536 /* the built-in parser will change our string if it sees \n */ 1537 need_buff = strchr(cmd, '\n') != NULL; 1538 #endif 1539 } 1540 if (need_buff) { 1541 buff = malloc(len + 1); 1542 if (!buff) 1543 return 1; 1544 memcpy(buff, cmd, len); 1545 buff[len] = '\0'; 1546 } 1547 #ifdef CONFIG_SYS_HUSH_PARSER 1548 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON); 1549 #else 1550 /* 1551 * This function will overwrite any \n it sees with a \0, which 1552 * is why it can't work with a const char *. Here we are making 1553 * using of internal knowledge of this function, to avoid always 1554 * doing a malloc() which is actually required only in a case that 1555 * is pretty rare. 1556 */ 1557 rcode = builtin_run_command_list(buff, flag); 1558 if (need_buff) 1559 free(buff); 1560 #endif 1561 1562 return rcode; 1563 } 1564 1565 /****************************************************************************/ 1566 1567 #if defined(CONFIG_CMD_RUN) 1568 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 1569 { 1570 int i; 1571 1572 if (argc < 2) 1573 return CMD_RET_USAGE; 1574 1575 for (i=1; i<argc; ++i) { 1576 char *arg; 1577 1578 if ((arg = getenv (argv[i])) == NULL) { 1579 printf ("## Error: \"%s\" not defined\n", argv[i]); 1580 return 1; 1581 } 1582 1583 if (run_command(arg, flag) != 0) 1584 return 1; 1585 } 1586 return 0; 1587 } 1588 #endif 1589