bin/sh/exec.c

   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  * 3. 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 <paths.h>
  47 #include <stdlib.h>
  48
  49 /*
  50  * When commands are first encountered, they are entered in a hash table.
  51  * This ensures that a full path search will not have to be done for them
  52  * on each invocation.
  53  *
  54  * We should investigate converting to a linear search, even though that
  55  * would make the command name "hash" a misnomer.
  56  */
  57
  58 #include "shell.h"
  59 #include "main.h"
  60 #include "nodes.h"
  61 #include "parser.h"
  62 #include "redir.h"
  63 #include "eval.h"
  64 #include "exec.h"
  65 #include "builtins.h"
  66 #include "var.h"
  67 #include "options.h"
  68 #include "input.h"
  69 #include "output.h"
  70 #include "syntax.h"
  71 #include "memalloc.h"
  72 #include "error.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
  81
  82
  83 struct tblentry {
  84         struct tblentry *next;  /* next entry in hash chain */
  85         union param param;      /* definition of builtin function */
  86         int special;            /* flag for special builtin commands */
  87         signed char cmdtype;    /* index identifying command */
  88         char cmdname[];         /* name of command */
  89 };
  90
  91
  92 static struct tblentry *cmdtable[CMDTABLESIZE];
  93 static int cmdtable_cd = 0;     /* cmdtable contains cd-dependent entries */
  94 int exerrno = 0;                        /* Last exec error */
  95
  96
  97 static void tryexec(char *, char **, char **);
  98 static void printentry(struct tblentry *, int);
  99 static struct tblentry *cmdlookup(const char *, int);
 100 static void delete_cmd_entry(void);
 101 static void addcmdentry(const char *, struct cmdentry *);
 102
 103
 104
 105 /*
 106  * Exec a program.  Never returns.  If you change this routine, you may
 107  * have to change the find_command routine as well.
 108  *
 109  * The argv array may be changed and element argv[-1] should be writable.
 110  */
 111
 112 void
 113 shellexec(char **argv, char **envp, const char *path, int idx)
 114 {
 115         char *cmdname;
 116         int e;
 117
 118         if (strchr(argv[0], '/') != NULL) {
 119                 tryexec(argv[0], argv, envp);
 120                 e = errno;
 121         } else {
 122                 e = ENOENT;
 123                 while ((cmdname = padvance(&path, argv[0])) != NULL) {
 124                         if (--idx < 0 && pathopt == NULL) {
 125                                 tryexec(cmdname, argv, envp);
 126                                 if (errno != ENOENT && errno != ENOTDIR)
 127                                         e = errno;
 128                                 if (e == ENOEXEC)
 129                                         break;
 130                         }
 131                         stunalloc(cmdname);
 132                 }
 133         }
 134
 135         /* Map to POSIX errors */
 136         if (e == ENOENT || e == ENOTDIR) {
 137                 exerrno = 127;
 138                 exerror(EXEXEC, "%s: not found", argv[0]);
 139         } else {
 140                 exerrno = 126;
 141                 exerror(EXEXEC, "%s: %s", argv[0], strerror(e));
 142         }
 143 }
 144
 145
 146 static void
 147 tryexec(char *cmd, char **argv, char **envp)
 148 {
 149         int e, in;
 150         ssize_t n;
 151         char buf[256];
 152
 153         execve(cmd, argv, envp);
 154         e = errno;
 155         if (e == ENOEXEC) {
 156                 INTOFF;
 157                 in = open(cmd, O_RDONLY | O_NONBLOCK);
 158                 if (in != -1) {
 159                         n = pread(in, buf, sizeof buf, 0);
 160                         close(in);
 161                         if (n > 0 && memchr(buf, '\0', n) != NULL) {
 162                                 errno = ENOEXEC;
 163                                 return;
 164                         }
 165                 }
 166                 *argv = cmd;
 167                 *--argv = __DECONST(char *, _PATH_BSHELL);
 168                 execve(_PATH_BSHELL, argv, envp);
 169         }
 170         errno = e;
 171 }
 172
 173 /*
 174  * Do a path search.  The variable path (passed by reference) should be
 175  * set to the start of the path before the first call; padvance will update
 176  * this value as it proceeds.  Successive calls to padvance will return
 177  * the possible path expansions in sequence.  If an option (indicated by
 178  * a percent sign) appears in the path entry then the global variable
 179  * pathopt will be set to point to it; otherwise pathopt will be set to
 180  * NULL.
 181  */
 182
 183 const char *pathopt;
 184
 185 char *
 186 padvance(const char **path, const char *name)
 187 {
 188         const char *p, *start;
 189         char *q;
 190         size_t len, namelen;
 191
 192         if (*path == NULL)
 193                 return NULL;
 194         start = *path;
 195         for (p = start; *p && *p != ':' && *p != '%'; p++)
 196                 ; /* nothing */
 197         namelen = strlen(name);
 198         len = p - start + namelen + 2;  /* "2" is for '/' and '\0' */
 199         STARTSTACKSTR(q);
 200         CHECKSTRSPACE(len, q);
 201         if (p != start) {
 202                 memcpy(q, start, p - start);
 203                 q += p - start;
 204                 *q++ = '/';
 205         }
 206         memcpy(q, name, namelen + 1);
 207         pathopt = NULL;
 208         if (*p == '%') {
 209                 pathopt = ++p;
 210                 while (*p && *p != ':')  p++;
 211         }
 212         if (*p == ':')
 213                 *path = p + 1;
 214         else
 215                 *path = NULL;
 216         return stalloc(len);
 217 }
 218
 219
 220
 221 /*** Command hashing code ***/
 222
 223
 224 int
 225 hashcmd(int argc __unused, char **argv __unused)
 226 {
 227         struct tblentry **pp;
 228         struct tblentry *cmdp;
 229         int c;
 230         int verbose;
 231         struct cmdentry entry;
 232         char *name;
 233         int errors;
 234
 235         errors = 0;
 236         verbose = 0;
 237         while ((c = nextopt("rv")) != '\0') {
 238                 if (c == 'r') {
 239                         clearcmdentry();
 240                 } else if (c == 'v') {
 241                         verbose++;
 242                 }
 243         }
 244         if (*argptr == NULL) {
 245                 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
 246                         for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
 247                                 if (cmdp->cmdtype == CMDNORMAL)
 248                                         printentry(cmdp, verbose);
 249                         }
 250                 }
 251                 return 0;
 252         }
 253         while ((name = *argptr) != NULL) {
 254                 if ((cmdp = cmdlookup(name, 0)) != NULL
 255                  && cmdp->cmdtype == CMDNORMAL)
 256                         delete_cmd_entry();
 257                 find_command(name, &entry, DO_ERR, pathval());
 258                 if (entry.cmdtype == CMDUNKNOWN)
 259                         errors = 1;
 260                 else if (verbose) {
 261                         cmdp = cmdlookup(name, 0);
 262                         if (cmdp != NULL)
 263                                 printentry(cmdp, verbose);
 264                         else {
 265                                 outfmt(out2, "%s: not found\n", name);
 266                                 errors = 1;
 267                         }
 268                         flushall();
 269                 }
 270                 argptr++;
 271         }
 272         return errors;
 273 }
 274
 275
 276 static void
 277 printentry(struct tblentry *cmdp, int verbose)
 278 {
 279         int idx;
 280         const char *path;
 281         char *name;
 282
 283         if (cmdp->cmdtype == CMDNORMAL) {
 284                 idx = cmdp->param.index;
 285                 path = pathval();
 286                 do {
 287                         name = padvance(&path, cmdp->cmdname);
 288                         stunalloc(name);
 289                 } while (--idx >= 0);
 290                 out1str(name);
 291         } else if (cmdp->cmdtype == CMDBUILTIN) {
 292                 out1fmt("builtin %s", cmdp->cmdname);
 293         } else if (cmdp->cmdtype == CMDFUNCTION) {
 294                 out1fmt("function %s", cmdp->cmdname);
 295                 if (verbose) {
 296                         INTOFF;
 297                         name = commandtext(getfuncnode(cmdp->param.func));
 298                         out1c(' ');
 299                         out1str(name);
 300                         ckfree(name);
 301                         INTON;
 302                 }
 303 #ifdef DEBUG
 304         } else {
 305                 error("internal error: cmdtype %d", cmdp->cmdtype);
 306 #endif
 307         }
 308         out1c('\n');
 309 }
 310
 311
 312
 313 /*
 314  * Resolve a command name.  If you change this routine, you may have to
 315  * change the shellexec routine as well.
 316  */
 317
 318 void
 319 find_command(const char *name, struct cmdentry *entry, int act,
 320     const char *path)
 321 {
 322         struct tblentry *cmdp, loc_cmd;
 323         int idx;
 324         char *fullname;
 325         struct stat statb;
 326         int e;
 327         int i;
 328         int spec;
 329         int cd;
 330
 331         /* If name contains a slash, don't use the hash table */
 332         if (strchr(name, '/') != NULL) {
 333                 entry->cmdtype = CMDNORMAL;
 334                 entry->u.index = 0;
 335                 return;
 336         }
 337
 338         cd = 0;
 339
 340         /* If name is in the table, and not invalidated by cd, we're done */
 341         if ((cmdp = cmdlookup(name, 0)) != NULL) {
 342                 if (cmdp->cmdtype == CMDFUNCTION && act & DO_NOFUNC)
 343                         cmdp = NULL;
 344                 else
 345                         goto success;
 346         }
 347
 348         /* Check for builtin next */
 349         if ((i = find_builtin(name, &spec)) >= 0) {
 350                 INTOFF;
 351                 cmdp = cmdlookup(name, 1);
 352                 if (cmdp->cmdtype == CMDFUNCTION)
 353                         cmdp = &loc_cmd;
 354                 cmdp->cmdtype = CMDBUILTIN;
 355                 cmdp->param.index = i;
 356                 cmdp->special = spec;
 357                 INTON;
 358                 goto success;
 359         }
 360
 361         /* We have to search path. */
 362
 363         e = ENOENT;
 364         idx = -1;
 365         for (;(fullname = padvance(&path, name)) != NULL; stunalloc(fullname)) {
 366                 idx++;
 367                 if (pathopt) {
 368                         if (strncmp(pathopt, "func", 4) == 0) {
 369                                 /* handled below */
 370                         } else {
 371                                 continue; /* ignore unimplemented options */
 372                         }
 373                 }
 374                 if (fullname[0] != '/')
 375                         cd = 1;
 376                 if (stat(fullname, &statb) < 0) {
 377                         if (errno != ENOENT && errno != ENOTDIR)
 378                                 e = errno;
 379                         continue;
 380                 }
 381                 e = EACCES;     /* if we fail, this will be the error */
 382                 if (!S_ISREG(statb.st_mode))
 383                         continue;
 384                 if (pathopt) {          /* this is a %func directory */
 385                         readcmdfile(fullname);
 386                         if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
 387                                 error("%s not defined in %s", name, fullname);
 388                         stunalloc(fullname);
 389                         goto success;
 390                 }
 391 #ifdef notdef
 392                 if (statb.st_uid == geteuid()) {
 393                         if ((statb.st_mode & 0100) == 0)
 394                                 goto loop;
 395                 } else if (statb.st_gid == getegid()) {
 396                         if ((statb.st_mode & 010) == 0)
 397                                 goto loop;
 398                 } else {
 399                         if ((statb.st_mode & 01) == 0)
 400                                 goto loop;
 401                 }
 402 #endif
 403                 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
 404                 INTOFF;
 405                 stunalloc(fullname);
 406                 cmdp = cmdlookup(name, 1);
 407                 if (cmdp->cmdtype == CMDFUNCTION)
 408                         cmdp = &loc_cmd;
 409                 cmdp->cmdtype = CMDNORMAL;
 410                 cmdp->param.index = idx;
 411                 INTON;
 412                 goto success;
 413         }
 414
 415         if (act & DO_ERR) {
 416                 if (e == ENOENT || e == ENOTDIR)
 417                         outfmt(out2, "%s: not found\n", name);
 418                 else
 419                         outfmt(out2, "%s: %s\n", name, strerror(e));
 420         }
 421         entry->cmdtype = CMDUNKNOWN;
 422         entry->u.index = 0;
 423         return;
 424
 425 success:
 426                 if (cd)
 427                         cmdtable_cd = 1;
 428                 entry->cmdtype = cmdp->cmdtype;
 429                 entry->u = cmdp->param;
 430                 entry->special = cmdp->special;
 431 }
 432
 433
 434
 435 /*
 436  * Search the table of builtin commands.
 437  */
 438
 439 int
 440 find_builtin(const char *name, int *special)
 441 {
 442         const struct builtincmd *bp;
 443
 444         for (bp = builtincmd ; bp->name ; bp++) {
 445                 if (*bp->name == *name && equal(bp->name, name)) {
 446                         *special = bp->special;
 447                         return bp->code;
 448                 }
 449         }
 450         return -1;
 451 }
 452
 453
 454
 455 /*
 456  * Called when a cd is done.  If any entry in cmdtable depends on the current
 457  * directory, simply clear cmdtable completely.
 458  */
 459
 460 void
 461 hashcd(void)
 462 {
 463         if (cmdtable_cd)
 464                 clearcmdentry();
 465 }
 466
 467
 468
 469 /*
 470  * Called before PATH is changed.  The argument is the new value of PATH;
 471  * pathval() still returns the old value at this point.  Called with
 472  * interrupts off.
 473  */
 474
 475 void
 476 changepath(const char *newval __unused)
 477 {
 478         clearcmdentry();
 479 }
 480
 481
 482 /*
 483  * Clear out command entries.  The argument specifies the first entry in
 484  * PATH which has changed.
 485  */
 486
 487 void
 488 clearcmdentry(void)
 489 {
 490         struct tblentry **tblp;
 491         struct tblentry **pp;
 492         struct tblentry *cmdp;
 493
 494         INTOFF;
 495         for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
 496                 pp = tblp;
 497                 while ((cmdp = *pp) != NULL) {
 498                         if (cmdp->cmdtype == CMDNORMAL) {
 499                                 *pp = cmdp->next;
 500                                 ckfree(cmdp);
 501                         } else {
 502                                 pp = &cmdp->next;
 503                         }
 504                 }
 505         }
 506         cmdtable_cd = 0;
 507         INTON;
 508 }
 509
 510
 511 /*
 512  * Locate a command in the command hash table.  If "add" is nonzero,
 513  * add the command to the table if it is not already present.  The
 514  * variable "lastcmdentry" is set to point to the address of the link
 515  * pointing to the entry, so that delete_cmd_entry can delete the
 516  * entry.
 517  */
 518
 519 static struct tblentry **lastcmdentry;
 520
 521
 522 static struct tblentry *
 523 cmdlookup(const char *name, int add)
 524 {
 525         int hashval;
 526         const char *p;
 527         struct tblentry *cmdp;
 528         struct tblentry **pp;
 529         size_t len;
 530
 531         p = name;
 532         hashval = *p << 4;
 533         while (*p)
 534                 hashval += *p++;
 535         hashval &= 0x7FFF;
 536         pp = &cmdtable[hashval % CMDTABLESIZE];
 537         for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
 538                 if (equal(cmdp->cmdname, name))
 539                         break;
 540                 pp = &cmdp->next;
 541         }
 542         if (add && cmdp == NULL) {
 543                 INTOFF;
 544                 len = strlen(name);
 545                 cmdp = *pp = ckmalloc(sizeof (struct tblentry) + len + 1);
 546                 cmdp->next = NULL;
 547                 cmdp->cmdtype = CMDUNKNOWN;
 548                 memcpy(cmdp->cmdname, name, len + 1);
 549                 INTON;
 550         }
 551         lastcmdentry = pp;
 552         return cmdp;
 553 }
 554
 555 /*
 556  * Delete the command entry returned on the last lookup.
 557  */
 558
 559 static void
 560 delete_cmd_entry(void)
 561 {
 562         struct tblentry *cmdp;
 563
 564         INTOFF;
 565         cmdp = *lastcmdentry;
 566         *lastcmdentry = cmdp->next;
 567         ckfree(cmdp);
 568         INTON;
 569 }
 570
 571
 572
 573 /*
 574  * Add a new command entry, replacing any existing command entry for
 575  * the same name.
 576  */
 577
 578 static void
 579 addcmdentry(const char *name, struct cmdentry *entry)
 580 {
 581         struct tblentry *cmdp;
 582
 583         INTOFF;
 584         cmdp = cmdlookup(name, 1);
 585         if (cmdp->cmdtype == CMDFUNCTION) {
 586                 unreffunc(cmdp->param.func);
 587         }
 588         cmdp->cmdtype = entry->cmdtype;
 589         cmdp->param = entry->u;
 590         INTON;
 591 }
 592
 593
 594 /*
 595  * Define a shell function.
 596  */
 597
 598 void
 599 defun(const char *name, union node *func)
 600 {
 601         struct cmdentry entry;
 602
 603         INTOFF;
 604         entry.cmdtype = CMDFUNCTION;
 605         entry.u.func = copyfunc(func);
 606         addcmdentry(name, &entry);
 607         INTON;
 608 }
 609
 610
 611 /*
 612  * Delete a function if it exists.
 613  * Called with interrupts off.
 614  */
 615
 616 int
 617 unsetfunc(const char *name)
 618 {
 619         struct tblentry *cmdp;
 620
 621         if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
 622                 unreffunc(cmdp->param.func);
 623                 delete_cmd_entry();
 624                 return (0);
 625         }
 626         return (0);
 627 }
 628
 629
 630 /*
 631  * Check if a function by a certain name exists.
 632  */
 633 int
 634 isfunc(const char *name)
 635 {
 636         struct tblentry *cmdp;
 637         cmdp = cmdlookup(name, 0);
 638         return (cmdp != NULL && cmdp->cmdtype == CMDFUNCTION);
 639 }
 640
 641
 642 /*
 643  * Shared code for the following builtin commands:
 644  *    type, command -v, command -V
 645  */
 646
 647 int
 648 typecmd_impl(int argc, char **argv, int cmd, const char *path)
 649 {
 650         struct cmdentry entry;
 651         struct tblentry *cmdp;
 652         const char * const *pp;
 653         struct alias *ap;
 654         int i;
 655         int error1 = 0;
 656
 657         if (path != pathval())
 658                 clearcmdentry();
 659
 660         for (i = 1; i < argc; i++) {
 661                 /* First look at the keywords */
 662                 for (pp = parsekwd; *pp; pp++)
 663                         if (**pp == *argv[i] && equal(*pp, argv[i]))
 664                                 break;
 665
 666                 if (*pp) {
 667                         if (cmd == TYPECMD_SMALLV)
 668                                 out1fmt("%s\n", argv[i]);
 669                         else
 670                                 out1fmt("%s is a shell keyword\n", argv[i]);
 671                         continue;
 672                 }
 673
 674                 /* Then look at the aliases */
 675                 if ((ap = lookupalias(argv[i], 1)) != NULL) {
 676                         if (cmd == TYPECMD_SMALLV) {
 677                                 out1fmt("alias %s=", argv[i]);
 678                                 out1qstr(ap->val);
 679                                 outcslow('\n', out1);
 680                         } else
 681                                 out1fmt("%s is an alias for %s\n", argv[i],
 682                                     ap->val);
 683                         continue;
 684                 }
 685
 686                 /* Then check if it is a tracked alias */
 687                 if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
 688                         entry.cmdtype = cmdp->cmdtype;
 689                         entry.u = cmdp->param;
 690                         entry.special = cmdp->special;
 691                 }
 692                 else {
 693                         /* Finally use brute force */
 694                         find_command(argv[i], &entry, 0, path);
 695                 }
 696
 697                 switch (entry.cmdtype) {
 698                 case CMDNORMAL: {
 699                         if (strchr(argv[i], '/') == NULL) {
 700                                 const char *path2 = path;
 701                                 char *name;
 702                                 int j = entry.u.index;
 703                                 do {
 704                                         name = padvance(&path2, argv[i]);
 705                                         stunalloc(name);
 706                                 } while (--j >= 0);
 707                                 if (cmd == TYPECMD_SMALLV)
 708                                         out1fmt("%s\n", name);
 709                                 else
 710                                         out1fmt("%s is%s %s\n", argv[i],
 711                                             (cmdp && cmd == TYPECMD_TYPE) ?
 712                                                 " a tracked alias for" : "",
 713                                             name);
 714                         } else {
 715                                 if (eaccess(argv[i], X_OK) == 0) {
 716                                         if (cmd == TYPECMD_SMALLV)
 717                                                 out1fmt("%s\n", argv[i]);
 718                                         else
 719                                                 out1fmt("%s is %s\n", argv[i],
 720                                                     argv[i]);
 721                                 } else {
 722                                         if (cmd != TYPECMD_SMALLV)
 723                                                 outfmt(out2, "%s: %s\n",
 724                                                     argv[i], strerror(errno));
 725                                         error1 |= 127;
 726                                 }
 727                         }
 728                         break;
 729                 }
 730                 case CMDFUNCTION:
 731                         if (cmd == TYPECMD_SMALLV)
 732                                 out1fmt("%s\n", argv[i]);
 733                         else
 734                                 out1fmt("%s is a shell function\n", argv[i]);
 735                         break;
 736
 737                 case CMDBUILTIN:
 738                         if (cmd == TYPECMD_SMALLV)
 739                                 out1fmt("%s\n", argv[i]);
 740                         else if (entry.special)
 741                                 out1fmt("%s is a special shell builtin\n",
 742                                     argv[i]);
 743                         else
 744                                 out1fmt("%s is a shell builtin\n", argv[i]);
 745                         break;
 746
 747                 default:
 748                         if (cmd != TYPECMD_SMALLV)
 749                                 outfmt(out2, "%s: not found\n", argv[i]);
 750                         error1 |= 127;
 751                         break;
 752                 }
 753         }
 754
 755         if (path != pathval())
 756                 clearcmdentry();
 757
 758         return error1;
 759 }
 760
 761 /*
 762  * Locate and print what a word is...
 763  */
 764
 765 int
 766 typecmd(int argc, char **argv)
 767 {
 768         if (argc > 2 && strcmp(argv[1], "--") == 0)
 769                 argc--, argv++;
 770         return typecmd_impl(argc, argv, TYPECMD_TYPE, bltinlookup("PATH", 1));
 771 }