1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)exec.c 8.4 (Berkeley) 6/8/95"; 36 #endif 37 #endif /* not lint */ 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <unistd.h> 44 #include <fcntl.h> 45 #include <errno.h> 46 #include <stdlib.h> 47 48 /* 49 * When commands are first encountered, they are entered in a hash table. 50 * This ensures that a full path search will not have to be done for them 51 * on each invocation. 52 * 53 * We should investigate converting to a linear search, even though that 54 * would make the command name "hash" a misnomer. 55 */ 56 57 #include "shell.h" 58 #include "main.h" 59 #include "nodes.h" 60 #include "parser.h" 61 #include "redir.h" 62 #include "eval.h" 63 #include "exec.h" 64 #include "builtins.h" 65 #include "var.h" 66 #include "options.h" 67 #include "input.h" 68 #include "output.h" 69 #include "syntax.h" 70 #include "memalloc.h" 71 #include "error.h" 72 #include "init.h" 73 #include "mystring.h" 74 #include "show.h" 75 #include "jobs.h" 76 #include "alias.h" 77 78 79 #define CMDTABLESIZE 31 /* should be prime */ 80 #define ARB 1 /* actual size determined at run time */ 81 82 83 84 struct tblentry { 85 struct tblentry *next; /* next entry in hash chain */ 86 union param param; /* definition of builtin function */ 87 int special; /* flag for special builtin commands */ 88 short cmdtype; /* index identifying command */ 89 char rehash; /* if set, cd done since entry created */ 90 char cmdname[ARB]; /* name of command */ 91 }; 92 93 94 STATIC struct tblentry *cmdtable[CMDTABLESIZE]; 95 STATIC int builtinloc = -1; /* index in path of %builtin, or -1 */ 96 int exerrno = 0; /* Last exec error */ 97 98 99 STATIC void tryexec(char *, char **, char **); 100 STATIC void printentry(struct tblentry *, int); 101 STATIC struct tblentry *cmdlookup(char *, int); 102 STATIC void delete_cmd_entry(void); 103 104 105 106 /* 107 * Exec a program. Never returns. If you change this routine, you may 108 * have to change the find_command routine as well. 109 */ 110 111 void 112 shellexec(char **argv, char **envp, char *path, int index) 113 { 114 char *cmdname; 115 int e; 116 117 if (strchr(argv[0], '/') != NULL) { 118 tryexec(argv[0], argv, envp); 119 e = errno; 120 } else { 121 e = ENOENT; 122 while ((cmdname = padvance(&path, argv[0])) != NULL) { 123 if (--index < 0 && pathopt == NULL) { 124 tryexec(cmdname, argv, envp); 125 if (errno != ENOENT && errno != ENOTDIR) 126 e = errno; 127 } 128 stunalloc(cmdname); 129 } 130 } 131 132 /* Map to POSIX errors */ 133 switch (e) { 134 case EACCES: 135 exerrno = 126; 136 break; 137 case ENOENT: 138 exerrno = 127; 139 break; 140 default: 141 exerrno = 2; 142 break; 143 } 144 if (e == ENOENT || e == ENOTDIR) 145 exerror(EXEXEC, "%s: not found", argv[0]); 146 exerror(EXEXEC, "%s: %s", argv[0], strerror(e)); 147 } 148 149 150 STATIC void 151 tryexec(char *cmd, char **argv, char **envp) 152 { 153 int e; 154 155 execve(cmd, argv, envp); 156 e = errno; 157 if (e == ENOEXEC) { 158 initshellproc(); 159 setinputfile(cmd, 0); 160 commandname = arg0 = savestr(argv[0]); 161 setparam(argv + 1); 162 exraise(EXSHELLPROC); 163 /*NOTREACHED*/ 164 } 165 errno = e; 166 } 167 168 /* 169 * Do a path search. The variable path (passed by reference) should be 170 * set to the start of the path before the first call; padvance will update 171 * this value as it proceeds. Successive calls to padvance will return 172 * the possible path expansions in sequence. If an option (indicated by 173 * a percent sign) appears in the path entry then the global variable 174 * pathopt will be set to point to it; otherwise pathopt will be set to 175 * NULL. 176 */ 177 178 char *pathopt; 179 180 char * 181 padvance(char **path, char *name) 182 { 183 char *p, *q; 184 char *start; 185 int len; 186 187 if (*path == NULL) 188 return NULL; 189 start = *path; 190 for (p = start; *p && *p != ':' && *p != '%'; p++) 191 ; /* nothing */ 192 len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */ 193 while (stackblocksize() < len) 194 growstackblock(); 195 q = stackblock(); 196 if (p != start) { 197 memcpy(q, start, p - start); 198 q += p - start; 199 *q++ = '/'; 200 } 201 strcpy(q, name); 202 pathopt = NULL; 203 if (*p == '%') { 204 pathopt = ++p; 205 while (*p && *p != ':') p++; 206 } 207 if (*p == ':') 208 *path = p + 1; 209 else 210 *path = NULL; 211 return stalloc(len); 212 } 213 214 215 216 /*** Command hashing code ***/ 217 218 219 int 220 hashcmd(int argc __unused, char **argv __unused) 221 { 222 struct tblentry **pp; 223 struct tblentry *cmdp; 224 int c; 225 int verbose; 226 struct cmdentry entry; 227 char *name; 228 229 verbose = 0; 230 while ((c = nextopt("rv")) != '\0') { 231 if (c == 'r') { 232 clearcmdentry(0); 233 } else if (c == 'v') { 234 verbose++; 235 } 236 } 237 if (*argptr == NULL) { 238 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { 239 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { 240 if (cmdp->cmdtype == CMDNORMAL) 241 printentry(cmdp, verbose); 242 } 243 } 244 return 0; 245 } 246 while ((name = *argptr) != NULL) { 247 if ((cmdp = cmdlookup(name, 0)) != NULL 248 && (cmdp->cmdtype == CMDNORMAL 249 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0))) 250 delete_cmd_entry(); 251 find_command(name, &entry, 1, pathval()); 252 if (verbose) { 253 if (entry.cmdtype != CMDUNKNOWN) { /* if no error msg */ 254 cmdp = cmdlookup(name, 0); 255 if (cmdp != NULL) 256 printentry(cmdp, verbose); 257 else 258 outfmt(&errout, "%s: not found\n", name); 259 } 260 flushall(); 261 } 262 argptr++; 263 } 264 return 0; 265 } 266 267 268 STATIC void 269 printentry(struct tblentry *cmdp, int verbose) 270 { 271 int index; 272 char *path; 273 char *name; 274 275 if (cmdp->cmdtype == CMDNORMAL) { 276 index = cmdp->param.index; 277 path = pathval(); 278 do { 279 name = padvance(&path, cmdp->cmdname); 280 stunalloc(name); 281 } while (--index >= 0); 282 out1str(name); 283 } else if (cmdp->cmdtype == CMDBUILTIN) { 284 out1fmt("builtin %s", cmdp->cmdname); 285 } else if (cmdp->cmdtype == CMDFUNCTION) { 286 out1fmt("function %s", cmdp->cmdname); 287 if (verbose) { 288 INTOFF; 289 name = commandtext(cmdp->param.func); 290 out1c(' '); 291 out1str(name); 292 ckfree(name); 293 INTON; 294 } 295 #ifdef DEBUG 296 } else { 297 error("internal error: cmdtype %d", cmdp->cmdtype); 298 #endif 299 } 300 if (cmdp->rehash) 301 out1c('*'); 302 out1c('\n'); 303 } 304 305 306 307 /* 308 * Resolve a command name. If you change this routine, you may have to 309 * change the shellexec routine as well. 310 */ 311 312 void 313 find_command(char *name, struct cmdentry *entry, int printerr, char *path) 314 { 315 struct tblentry *cmdp; 316 int index; 317 int prev; 318 char *fullname; 319 struct stat statb; 320 int e; 321 int i; 322 int spec; 323 324 /* If name contains a slash, don't use the hash table */ 325 if (strchr(name, '/') != NULL) { 326 entry->cmdtype = CMDNORMAL; 327 entry->u.index = 0; 328 return; 329 } 330 331 /* If name is in the table, and not invalidated by cd, we're done */ 332 if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->rehash == 0) 333 goto success; 334 335 /* If %builtin not in path, check for builtin next */ 336 if (builtinloc < 0 && (i = find_builtin(name, &spec)) >= 0) { 337 INTOFF; 338 cmdp = cmdlookup(name, 1); 339 cmdp->cmdtype = CMDBUILTIN; 340 cmdp->param.index = i; 341 cmdp->special = spec; 342 INTON; 343 goto success; 344 } 345 346 /* We have to search path. */ 347 prev = -1; /* where to start */ 348 if (cmdp) { /* doing a rehash */ 349 if (cmdp->cmdtype == CMDBUILTIN) 350 prev = builtinloc; 351 else 352 prev = cmdp->param.index; 353 } 354 355 e = ENOENT; 356 index = -1; 357 loop: 358 while ((fullname = padvance(&path, name)) != NULL) { 359 stunalloc(fullname); 360 index++; 361 if (pathopt) { 362 if (prefix("builtin", pathopt)) { 363 if ((i = find_builtin(name, &spec)) < 0) 364 goto loop; 365 INTOFF; 366 cmdp = cmdlookup(name, 1); 367 cmdp->cmdtype = CMDBUILTIN; 368 cmdp->param.index = i; 369 cmdp->special = spec; 370 INTON; 371 goto success; 372 } else if (prefix("func", pathopt)) { 373 /* handled below */ 374 } else { 375 goto loop; /* ignore unimplemented options */ 376 } 377 } 378 /* if rehash, don't redo absolute path names */ 379 if (fullname[0] == '/' && index <= prev) { 380 if (index < prev) 381 goto loop; 382 TRACE(("searchexec \"%s\": no change\n", name)); 383 goto success; 384 } 385 if (stat(fullname, &statb) < 0) { 386 if (errno != ENOENT && errno != ENOTDIR) 387 e = errno; 388 goto loop; 389 } 390 e = EACCES; /* if we fail, this will be the error */ 391 if (!S_ISREG(statb.st_mode)) 392 goto loop; 393 if (pathopt) { /* this is a %func directory */ 394 stalloc(strlen(fullname) + 1); 395 readcmdfile(fullname); 396 if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION) 397 error("%s not defined in %s", name, fullname); 398 stunalloc(fullname); 399 goto success; 400 } 401 #ifdef notdef 402 if (statb.st_uid == geteuid()) { 403 if ((statb.st_mode & 0100) == 0) 404 goto loop; 405 } else if (statb.st_gid == getegid()) { 406 if ((statb.st_mode & 010) == 0) 407 goto loop; 408 } else { 409 if ((statb.st_mode & 01) == 0) 410 goto loop; 411 } 412 #endif 413 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname)); 414 INTOFF; 415 cmdp = cmdlookup(name, 1); 416 cmdp->cmdtype = CMDNORMAL; 417 cmdp->param.index = index; 418 INTON; 419 goto success; 420 } 421 422 /* We failed. If there was an entry for this command, delete it */ 423 if (cmdp) 424 delete_cmd_entry(); 425 if (printerr) { 426 if (e == ENOENT || e == ENOTDIR) 427 outfmt(out2, "%s: not found\n", name); 428 else 429 outfmt(out2, "%s: %s\n", name, strerror(e)); 430 } 431 entry->cmdtype = CMDUNKNOWN; 432 return; 433 434 success: 435 cmdp->rehash = 0; 436 entry->cmdtype = cmdp->cmdtype; 437 entry->u = cmdp->param; 438 entry->special = cmdp->special; 439 } 440 441 442 443 /* 444 * Search the table of builtin commands. 445 */ 446 447 int 448 find_builtin(char *name, int *special) 449 { 450 const struct builtincmd *bp; 451 452 for (bp = builtincmd ; bp->name ; bp++) { 453 if (*bp->name == *name && equal(bp->name, name)) { 454 *special = bp->special; 455 return bp->code; 456 } 457 } 458 return -1; 459 } 460 461 462 463 /* 464 * Called when a cd is done. Marks all commands so the next time they 465 * are executed they will be rehashed. 466 */ 467 468 void 469 hashcd(void) 470 { 471 struct tblentry **pp; 472 struct tblentry *cmdp; 473 474 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { 475 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { 476 if (cmdp->cmdtype == CMDNORMAL 477 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)) 478 cmdp->rehash = 1; 479 } 480 } 481 } 482 483 484 485 /* 486 * Called before PATH is changed. The argument is the new value of PATH; 487 * pathval() still returns the old value at this point. Called with 488 * interrupts off. 489 */ 490 491 void 492 changepath(const char *newval) 493 { 494 const char *old, *new; 495 int index; 496 int firstchange; 497 int bltin; 498 499 old = pathval(); 500 new = newval; 501 firstchange = 9999; /* assume no change */ 502 index = 0; 503 bltin = -1; 504 for (;;) { 505 if (*old != *new) { 506 firstchange = index; 507 if ((*old == '\0' && *new == ':') 508 || (*old == ':' && *new == '\0')) 509 firstchange++; 510 old = new; /* ignore subsequent differences */ 511 } 512 if (*new == '\0') 513 break; 514 if (*new == '%' && bltin < 0 && prefix("builtin", new + 1)) 515 bltin = index; 516 if (*new == ':') { 517 index++; 518 } 519 new++, old++; 520 } 521 if (builtinloc < 0 && bltin >= 0) 522 builtinloc = bltin; /* zap builtins */ 523 if (builtinloc >= 0 && bltin < 0) 524 firstchange = 0; 525 clearcmdentry(firstchange); 526 builtinloc = bltin; 527 } 528 529 530 /* 531 * Clear out command entries. The argument specifies the first entry in 532 * PATH which has changed. 533 */ 534 535 void 536 clearcmdentry(int firstchange) 537 { 538 struct tblentry **tblp; 539 struct tblentry **pp; 540 struct tblentry *cmdp; 541 542 INTOFF; 543 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) { 544 pp = tblp; 545 while ((cmdp = *pp) != NULL) { 546 if ((cmdp->cmdtype == CMDNORMAL && 547 cmdp->param.index >= firstchange) 548 || (cmdp->cmdtype == CMDBUILTIN && 549 builtinloc >= firstchange)) { 550 *pp = cmdp->next; 551 ckfree(cmdp); 552 } else { 553 pp = &cmdp->next; 554 } 555 } 556 } 557 INTON; 558 } 559 560 561 /* 562 * Delete all functions. 563 */ 564 565 #ifdef mkinit 566 MKINIT void deletefuncs(void); 567 568 SHELLPROC { 569 deletefuncs(); 570 } 571 #endif 572 573 void 574 deletefuncs(void) 575 { 576 struct tblentry **tblp; 577 struct tblentry **pp; 578 struct tblentry *cmdp; 579 580 INTOFF; 581 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) { 582 pp = tblp; 583 while ((cmdp = *pp) != NULL) { 584 if (cmdp->cmdtype == CMDFUNCTION) { 585 *pp = cmdp->next; 586 freefunc(cmdp->param.func); 587 ckfree(cmdp); 588 } else { 589 pp = &cmdp->next; 590 } 591 } 592 } 593 INTON; 594 } 595 596 597 598 /* 599 * Locate a command in the command hash table. If "add" is nonzero, 600 * add the command to the table if it is not already present. The 601 * variable "lastcmdentry" is set to point to the address of the link 602 * pointing to the entry, so that delete_cmd_entry can delete the 603 * entry. 604 */ 605 606 STATIC struct tblentry **lastcmdentry; 607 608 609 STATIC struct tblentry * 610 cmdlookup(char *name, int add) 611 { 612 int hashval; 613 char *p; 614 struct tblentry *cmdp; 615 struct tblentry **pp; 616 617 p = name; 618 hashval = *p << 4; 619 while (*p) 620 hashval += *p++; 621 hashval &= 0x7FFF; 622 pp = &cmdtable[hashval % CMDTABLESIZE]; 623 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { 624 if (equal(cmdp->cmdname, name)) 625 break; 626 pp = &cmdp->next; 627 } 628 if (add && cmdp == NULL) { 629 INTOFF; 630 cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB 631 + strlen(name) + 1); 632 cmdp->next = NULL; 633 cmdp->cmdtype = CMDUNKNOWN; 634 cmdp->rehash = 0; 635 strcpy(cmdp->cmdname, name); 636 INTON; 637 } 638 lastcmdentry = pp; 639 return cmdp; 640 } 641 642 /* 643 * Delete the command entry returned on the last lookup. 644 */ 645 646 STATIC void 647 delete_cmd_entry(void) 648 { 649 struct tblentry *cmdp; 650 651 INTOFF; 652 cmdp = *lastcmdentry; 653 *lastcmdentry = cmdp->next; 654 ckfree(cmdp); 655 INTON; 656 } 657 658 659 660 /* 661 * Add a new command entry, replacing any existing command entry for 662 * the same name. 663 */ 664 665 void 666 addcmdentry(char *name, struct cmdentry *entry) 667 { 668 struct tblentry *cmdp; 669 670 INTOFF; 671 cmdp = cmdlookup(name, 1); 672 if (cmdp->cmdtype == CMDFUNCTION) { 673 freefunc(cmdp->param.func); 674 } 675 cmdp->cmdtype = entry->cmdtype; 676 cmdp->param = entry->u; 677 INTON; 678 } 679 680 681 /* 682 * Define a shell function. 683 */ 684 685 void 686 defun(char *name, union node *func) 687 { 688 struct cmdentry entry; 689 690 INTOFF; 691 entry.cmdtype = CMDFUNCTION; 692 entry.u.func = copyfunc(func); 693 addcmdentry(name, &entry); 694 INTON; 695 } 696 697 698 /* 699 * Delete a function if it exists. 700 */ 701 702 int 703 unsetfunc(char *name) 704 { 705 struct tblentry *cmdp; 706 707 if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) { 708 freefunc(cmdp->param.func); 709 delete_cmd_entry(); 710 return (0); 711 } 712 return (0); 713 } 714 715 /* 716 * Shared code for the following builtin commands: 717 * type, command -v, command -V 718 */ 719 720 int 721 typecmd_impl(int argc, char **argv, int cmd) 722 { 723 struct cmdentry entry; 724 struct tblentry *cmdp; 725 char **pp; 726 struct alias *ap; 727 int i; 728 int error = 0; 729 extern char *const parsekwd[]; 730 731 for (i = 1; i < argc; i++) { 732 /* First look at the keywords */ 733 for (pp = (char **)parsekwd; *pp; pp++) 734 if (**pp == *argv[i] && equal(*pp, argv[i])) 735 break; 736 737 if (*pp) { 738 if (cmd == TYPECMD_SMALLV) 739 out1fmt("%s\n", argv[i]); 740 else 741 out1fmt("%s is a shell keyword\n", argv[i]); 742 continue; 743 } 744 745 /* Then look at the aliases */ 746 if ((ap = lookupalias(argv[i], 1)) != NULL) { 747 if (cmd == TYPECMD_SMALLV) 748 out1fmt("alias %s='%s'\n", argv[i], ap->val); 749 else 750 out1fmt("%s is an alias for %s\n", argv[i], 751 ap->val); 752 continue; 753 } 754 755 /* Then check if it is a tracked alias */ 756 if ((cmdp = cmdlookup(argv[i], 0)) != NULL) { 757 entry.cmdtype = cmdp->cmdtype; 758 entry.u = cmdp->param; 759 entry.special = cmdp->special; 760 } 761 else { 762 /* Finally use brute force */ 763 find_command(argv[i], &entry, 0, pathval()); 764 } 765 766 switch (entry.cmdtype) { 767 case CMDNORMAL: { 768 if (strchr(argv[i], '/') == NULL) { 769 char *path = pathval(), *name; 770 int j = entry.u.index; 771 do { 772 name = padvance(&path, argv[i]); 773 stunalloc(name); 774 } while (--j >= 0); 775 if (cmd == TYPECMD_SMALLV) 776 out1fmt("%s\n", name); 777 else 778 out1fmt("%s is%s %s\n", argv[i], 779 (cmdp && cmd == TYPECMD_TYPE) ? 780 " a tracked alias for" : "", 781 name); 782 } else { 783 if (eaccess(argv[i], X_OK) == 0) { 784 if (cmd == TYPECMD_SMALLV) 785 out1fmt("%s\n", argv[i]); 786 else 787 out1fmt("%s is %s\n", argv[i], 788 argv[i]); 789 } else { 790 if (cmd != TYPECMD_SMALLV) 791 outfmt(out2, "%s: %s\n", 792 argv[i], strerror(errno)); 793 error |= 127; 794 } 795 } 796 break; 797 } 798 case CMDFUNCTION: 799 if (cmd == TYPECMD_SMALLV) 800 out1fmt("%s\n", argv[i]); 801 else 802 out1fmt("%s is a shell function\n", argv[i]); 803 break; 804 805 case CMDBUILTIN: 806 if (cmd == TYPECMD_SMALLV) 807 out1fmt("%s\n", argv[i]); 808 else if (entry.special) 809 out1fmt("%s is a special shell builtin\n", 810 argv[i]); 811 else 812 out1fmt("%s is a shell builtin\n", argv[i]); 813 break; 814 815 default: 816 if (cmd != TYPECMD_SMALLV) 817 outfmt(out2, "%s: not found\n", argv[i]); 818 error |= 127; 819 break; 820 } 821 } 822 return error; 823 } 824 825 /* 826 * Locate and print what a word is... 827 */ 828 829 int 830 typecmd(int argc, char **argv) 831 { 832 return typecmd_impl(argc, argv, TYPECMD_TYPE); 833 } 834