1 /* 2 * (C) Copyright 2000-2003 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 /* 25 * Command Processor Table 26 */ 27 28 #include <common.h> 29 #include <command.h> 30 31 int 32 do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 33 { 34 extern char version_string[]; 35 printf ("\n%s\n", version_string); 36 return 0; 37 } 38 39 U_BOOT_CMD( 40 version, 1, 1, do_version, 41 "version - print monitor version\n", 42 NULL 43 ); 44 45 #if (CONFIG_COMMANDS & CFG_CMD_ECHO) 46 47 int 48 do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 49 { 50 int i, putnl = 1; 51 52 for (i = 1; i < argc; i++) { 53 char *p = argv[i], c; 54 55 if (i > 1) 56 putc(' '); 57 while ((c = *p++) != '\0') { 58 if (c == '\\' && *p == 'c') { 59 putnl = 0; 60 p++; 61 } else { 62 putc(c); 63 } 64 } 65 } 66 67 if (putnl) 68 putc('\n'); 69 return 0; 70 } 71 72 U_BOOT_CMD( 73 echo, CFG_MAXARGS, 1, do_echo, 74 "echo - echo args to console\n", 75 "[args..]\n" 76 " - echo args to console; \\c suppresses newline\n" 77 ); 78 79 #endif /* CFG_CMD_ECHO */ 80 81 #ifdef CFG_HUSH_PARSER 82 83 int 84 do_test (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 85 { 86 char **ap; 87 int left, adv, expr, last_expr, neg, last_cmp; 88 89 /* args? */ 90 if (argc < 3) 91 return 1; 92 93 #if 0 94 { 95 printf("test:"); 96 left = 1; 97 while (argv[left]) 98 printf(" %s", argv[left++]); 99 } 100 #endif 101 102 last_expr = 0; 103 left = argc - 1; ap = argv + 1; 104 if (left > 0 && strcmp(ap[0], "!") == 0) { 105 neg = 1; 106 ap++; 107 left--; 108 } else 109 neg = 0; 110 111 expr = -1; 112 last_cmp = -1; 113 last_expr = -1; 114 while (left > 0) { 115 116 if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0) 117 adv = 1; 118 else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0) 119 adv = 2; 120 else 121 adv = 3; 122 123 if (left < adv) { 124 expr = 1; 125 break; 126 } 127 128 if (adv == 1) { 129 if (strcmp(ap[0], "-o") == 0) { 130 last_expr = expr; 131 last_cmp = 0; 132 } else if (strcmp(ap[0], "-a") == 0) { 133 last_expr = expr; 134 last_cmp = 1; 135 } else { 136 expr = 1; 137 break; 138 } 139 } 140 141 if (adv == 2) { 142 if (strcmp(ap[0], "-z") == 0) 143 expr = strlen(ap[1]) == 0 ? 1 : 0; 144 else if (strcmp(ap[0], "-n") == 0) 145 expr = strlen(ap[1]) == 0 ? 0 : 1; 146 else { 147 expr = 1; 148 break; 149 } 150 151 if (last_cmp == 0) 152 expr = last_expr || expr; 153 else if (last_cmp == 1) 154 expr = last_expr && expr; 155 last_cmp = -1; 156 } 157 158 if (adv == 3) { 159 if (strcmp(ap[1], "=") == 0) 160 expr = strcmp(ap[0], ap[2]) == 0; 161 else if (strcmp(ap[1], "!=") == 0) 162 expr = strcmp(ap[0], ap[2]) != 0; 163 else if (strcmp(ap[1], ">") == 0) 164 expr = strcmp(ap[0], ap[2]) > 0; 165 else if (strcmp(ap[1], "<") == 0) 166 expr = strcmp(ap[0], ap[2]) < 0; 167 else if (strcmp(ap[1], "-eq") == 0) 168 expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10); 169 else if (strcmp(ap[1], "-ne") == 0) 170 expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10); 171 else if (strcmp(ap[1], "-lt") == 0) 172 expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10); 173 else if (strcmp(ap[1], "-le") == 0) 174 expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10); 175 else if (strcmp(ap[1], "-gt") == 0) 176 expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10); 177 else if (strcmp(ap[1], "-ge") == 0) 178 expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10); 179 else { 180 expr = 1; 181 break; 182 } 183 184 if (last_cmp == 0) 185 expr = last_expr || expr; 186 else if (last_cmp == 1) 187 expr = last_expr && expr; 188 last_cmp = -1; 189 } 190 191 ap += adv; left -= adv; 192 } 193 194 if (neg) 195 expr = !expr; 196 197 expr = !expr; 198 199 #if 0 200 printf(": returns %d\n", expr); 201 #endif 202 203 return expr; 204 } 205 206 U_BOOT_CMD( 207 test, CFG_MAXARGS, 1, do_test, 208 "test - minimal test like /bin/sh\n", 209 "[args..]\n" 210 " - test functionality\n" 211 ); 212 213 int 214 do_exit (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 215 { 216 int r; 217 218 r = 0; 219 if (argc > 1) 220 r = simple_strtoul(argv[1], NULL, 10); 221 222 return -r - 2; 223 } 224 225 U_BOOT_CMD( 226 exit, 2, 1, do_exit, 227 "exit - exit script\n", 228 " - exit functionality\n" 229 ); 230 231 232 #endif 233 234 /* 235 * Use puts() instead of printf() to avoid printf buffer overflow 236 * for long help messages 237 */ 238 int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 239 { 240 int i; 241 int rcode = 0; 242 243 if (argc == 1) { /*show list of commands */ 244 245 int cmd_items = &__u_boot_cmd_end - 246 &__u_boot_cmd_start; /* pointer arith! */ 247 cmd_tbl_t *cmd_array[cmd_items]; 248 int i, j, swaps; 249 250 /* Make array of commands from .uboot_cmd section */ 251 cmdtp = &__u_boot_cmd_start; 252 for (i = 0; i < cmd_items; i++) { 253 cmd_array[i] = cmdtp++; 254 } 255 256 /* Sort command list (trivial bubble sort) */ 257 for (i = cmd_items - 1; i > 0; --i) { 258 swaps = 0; 259 for (j = 0; j < i; ++j) { 260 if (strcmp (cmd_array[j]->name, 261 cmd_array[j + 1]->name) > 0) { 262 cmd_tbl_t *tmp; 263 tmp = cmd_array[j]; 264 cmd_array[j] = cmd_array[j + 1]; 265 cmd_array[j + 1] = tmp; 266 ++swaps; 267 } 268 } 269 if (!swaps) 270 break; 271 } 272 273 /* print short help (usage) */ 274 for (i = 0; i < cmd_items; i++) { 275 const char *usage = cmd_array[i]->usage; 276 277 /* allow user abort */ 278 if (ctrlc ()) 279 return 1; 280 if (usage == NULL) 281 continue; 282 puts (usage); 283 } 284 return 0; 285 } 286 /* 287 * command help (long version) 288 */ 289 for (i = 1; i < argc; ++i) { 290 if ((cmdtp = find_cmd (argv[i])) != NULL) { 291 #ifdef CFG_LONGHELP 292 /* found - print (long) help info */ 293 puts (cmdtp->name); 294 putc (' '); 295 if (cmdtp->help) { 296 puts (cmdtp->help); 297 } else { 298 puts ("- No help available.\n"); 299 rcode = 1; 300 } 301 putc ('\n'); 302 #else /* no long help available */ 303 if (cmdtp->usage) 304 puts (cmdtp->usage); 305 #endif /* CFG_LONGHELP */ 306 } else { 307 printf ("Unknown command '%s' - try 'help'" 308 " without arguments for list of all" 309 " known commands\n\n", argv[i] 310 ); 311 rcode = 1; 312 } 313 } 314 return rcode; 315 } 316 317 318 U_BOOT_CMD( 319 help, CFG_MAXARGS, 1, do_help, 320 "help - print online help\n", 321 "[command ...]\n" 322 " - show help information (for 'command')\n" 323 "'help' prints online help for the monitor commands.\n\n" 324 "Without arguments, it prints a short usage message for all commands.\n\n" 325 "To get detailed help information for specific commands you can type\n" 326 "'help' with one or more command names as arguments.\n" 327 ); 328 329 /* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */ 330 #ifdef CFG_LONGHELP 331 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = { 332 "?", CFG_MAXARGS, 1, do_help, 333 "? - alias for 'help'\n", 334 NULL 335 }; 336 #else 337 cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = { 338 "?", CFG_MAXARGS, 1, do_help, 339 "? - alias for 'help'\n" 340 }; 341 #endif /* CFG_LONGHELP */ 342 343 /*************************************************************************** 344 * find command table entry for a command 345 */ 346 cmd_tbl_t *find_cmd (const char *cmd) 347 { 348 cmd_tbl_t *cmdtp; 349 cmd_tbl_t *cmdtp_temp = &__u_boot_cmd_start; /*Init value */ 350 const char *p; 351 int len; 352 int n_found = 0; 353 354 /* 355 * Some commands allow length modifiers (like "cp.b"); 356 * compare command name only until first dot. 357 */ 358 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd); 359 360 for (cmdtp = &__u_boot_cmd_start; 361 cmdtp != &__u_boot_cmd_end; 362 cmdtp++) { 363 if (strncmp (cmd, cmdtp->name, len) == 0) { 364 if (len == strlen (cmdtp->name)) 365 return cmdtp; /* full match */ 366 367 cmdtp_temp = cmdtp; /* abbreviated command ? */ 368 n_found++; 369 } 370 } 371 if (n_found == 1) { /* exactly one match */ 372 return cmdtp_temp; 373 } 374 375 return NULL; /* not found or ambiguous command */ 376 } 377 378 #ifdef CONFIG_AUTO_COMPLETE 379 380 int var_complete(int argc, char *argv[], char last_char, int maxv, char *cmdv[]) 381 { 382 static char tmp_buf[512]; 383 int space; 384 385 space = last_char == '\0' || last_char == ' ' || last_char == '\t'; 386 387 if (space && argc == 1) 388 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf); 389 390 if (!space && argc == 2) 391 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf); 392 393 return 0; 394 } 395 396 static void install_auto_complete_handler(const char *cmd, 397 int (*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[])) 398 { 399 cmd_tbl_t *cmdtp; 400 401 cmdtp = find_cmd(cmd); 402 if (cmdtp == NULL) 403 return; 404 405 cmdtp->complete = complete; 406 } 407 408 void install_auto_complete(void) 409 { 410 install_auto_complete_handler("printenv", var_complete); 411 install_auto_complete_handler("setenv", var_complete); 412 #if (CONFIG_COMMANDS & CFG_CMD_RUN) 413 install_auto_complete_handler("run", var_complete); 414 #endif 415 } 416 417 /*************************************************************************************/ 418 419 static int complete_cmdv(int argc, char *argv[], char last_char, int maxv, char *cmdv[]) 420 { 421 cmd_tbl_t *cmdtp; 422 const char *p; 423 int len, clen; 424 int n_found = 0; 425 const char *cmd; 426 427 /* sanity? */ 428 if (maxv < 2) 429 return -2; 430 431 cmdv[0] = NULL; 432 433 if (argc == 0) { 434 /* output full list of commands */ 435 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) { 436 if (n_found >= maxv - 2) { 437 cmdv[n_found++] = "..."; 438 break; 439 } 440 cmdv[n_found++] = cmdtp->name; 441 } 442 cmdv[n_found] = NULL; 443 return n_found; 444 } 445 446 /* more than one arg or one but the start of the next */ 447 if (argc > 1 || (last_char == '\0' || last_char == ' ' || last_char == '\t')) { 448 cmdtp = find_cmd(argv[0]); 449 if (cmdtp == NULL || cmdtp->complete == NULL) { 450 cmdv[0] = NULL; 451 return 0; 452 } 453 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv); 454 } 455 456 cmd = argv[0]; 457 /* 458 * Some commands allow length modifiers (like "cp.b"); 459 * compare command name only until first dot. 460 */ 461 p = strchr(cmd, '.'); 462 if (p == NULL) 463 len = strlen(cmd); 464 else 465 len = p - cmd; 466 467 /* return the partial matches */ 468 for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) { 469 470 clen = strlen(cmdtp->name); 471 if (clen < len) 472 continue; 473 474 if (memcmp(cmd, cmdtp->name, len) != 0) 475 continue; 476 477 /* too many! */ 478 if (n_found >= maxv - 2) { 479 cmdv[n_found++] = "..."; 480 break; 481 } 482 483 cmdv[n_found++] = cmdtp->name; 484 } 485 486 cmdv[n_found] = NULL; 487 return n_found; 488 } 489 490 static int make_argv(char *s, int argvsz, char *argv[]) 491 { 492 int argc = 0; 493 494 /* split into argv */ 495 while (argc < argvsz - 1) { 496 497 /* skip any white space */ 498 while ((*s == ' ') || (*s == '\t')) 499 ++s; 500 501 if (*s == '\0') /* end of s, no more args */ 502 break; 503 504 argv[argc++] = s; /* begin of argument string */ 505 506 /* find end of string */ 507 while (*s && (*s != ' ') && (*s != '\t')) 508 ++s; 509 510 if (*s == '\0') /* end of s, no more args */ 511 break; 512 513 *s++ = '\0'; /* terminate current arg */ 514 } 515 argv[argc] = NULL; 516 517 return argc; 518 } 519 520 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char *argv[]) 521 { 522 int ll = leader != NULL ? strlen(leader) : 0; 523 int sl = sep != NULL ? strlen(sep) : 0; 524 int len, i; 525 526 if (banner) { 527 puts("\n"); 528 puts(banner); 529 } 530 531 i = linemax; /* force leader and newline */ 532 while (*argv != NULL) { 533 len = strlen(*argv) + sl; 534 if (i + len >= linemax) { 535 puts("\n"); 536 if (leader) 537 puts(leader); 538 i = ll - sl; 539 } else if (sep) 540 puts(sep); 541 puts(*argv++); 542 i += len; 543 } 544 printf("\n"); 545 } 546 547 static int find_common_prefix(char *argv[]) 548 { 549 int i, len; 550 char *anchor, *s, *t; 551 552 if (*argv == NULL) 553 return 0; 554 555 /* begin with max */ 556 anchor = *argv++; 557 len = strlen(anchor); 558 while ((t = *argv++) != NULL) { 559 s = anchor; 560 for (i = 0; i < len; i++, t++, s++) { 561 if (*t != *s) 562 break; 563 } 564 len = s - anchor; 565 } 566 return len; 567 } 568 569 static char tmp_buf[CFG_CBSIZE]; /* copy of console I/O buffer */ 570 571 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp) 572 { 573 int n = *np, col = *colp; 574 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */ 575 char *cmdv[20]; 576 char *s, *t; 577 const char *sep; 578 int i, j, k, len, seplen, argc; 579 int cnt; 580 char last_char; 581 582 if (strcmp(prompt, CFG_PROMPT) != 0) 583 return 0; /* not in normal console */ 584 585 cnt = strlen(buf); 586 if (cnt >= 1) 587 last_char = buf[cnt - 1]; 588 else 589 last_char = '\0'; 590 591 /* copy to secondary buffer which will be affected */ 592 strcpy(tmp_buf, buf); 593 594 /* separate into argv */ 595 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv); 596 597 /* do the completion and return the possible completions */ 598 i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv); 599 600 /* no match; bell and out */ 601 if (i == 0) { 602 if (argc > 1) /* allow tab for non command */ 603 return 0; 604 putc('\a'); 605 return 1; 606 } 607 608 s = NULL; 609 len = 0; 610 sep = NULL; 611 seplen = 0; 612 if (i == 1) { /* one match; perfect */ 613 k = strlen(argv[argc - 1]); 614 s = cmdv[0] + k; 615 len = strlen(s); 616 sep = " "; 617 seplen = 1; 618 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */ 619 k = strlen(argv[argc - 1]); 620 j -= k; 621 if (j > 0) { 622 s = cmdv[0] + k; 623 len = j; 624 } 625 } 626 627 if (s != NULL) { 628 k = len + seplen; 629 /* make sure it fits */ 630 if (n + k >= CFG_CBSIZE - 2) { 631 putc('\a'); 632 return 1; 633 } 634 635 t = buf + cnt; 636 for (i = 0; i < len; i++) 637 *t++ = *s++; 638 if (sep != NULL) 639 for (i = 0; i < seplen; i++) 640 *t++ = sep[i]; 641 *t = '\0'; 642 n += k; 643 col += k; 644 puts(t - k); 645 if (sep == NULL) 646 putc('\a'); 647 *np = n; 648 *colp = col; 649 } else { 650 print_argv(NULL, " ", " ", 78, cmdv); 651 652 puts(prompt); 653 puts(buf); 654 } 655 return 1; 656 } 657 658 #endif 659