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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         len = p - start + strlen(name) + 2;     /* "2" is for '/' and '\0' */
192         while (stackblocksize() < len)
193                 growstackblock();
194         q = stackblock();
195         if (p != start) {
196                 memcpy(q, start, p - start);
197                 q += p - start;
198                 *q++ = '/';
199         }
200         strcpy(q, name);
201         pathopt = NULL;
202         if (*p == '%') {
203                 pathopt = ++p;
204                 while (*p && *p != ':')  p++;
205         }
206         if (*p == ':')
207                 *path = p + 1;
208         else
209                 *path = NULL;
210         return stalloc(len);
211 }
212
213
214
215 /*** Command hashing code ***/
216
217
218 int
219 hashcmd(int argc __unused, char **argv __unused)
220 {
221         struct tblentry **pp;
222         struct tblentry *cmdp;
223         int c;
224         int verbose;
225         struct cmdentry entry;
226         char *name;
227
228         verbose = 0;
229         while ((c = nextopt("rv")) != '\0') {
230                 if (c == 'r') {
231                         clearcmdentry(0);
232                 } else if (c == 'v') {
233                         verbose++;
234                 }
235         }
236         if (*argptr == NULL) {
237                 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
238                         for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
239                                 if (cmdp->cmdtype == CMDNORMAL)
240                                         printentry(cmdp, verbose);
241                         }
242                 }
243                 return 0;
244         }
245         while ((name = *argptr) != NULL) {
246                 if ((cmdp = cmdlookup(name, 0)) != NULL
247                  && (cmdp->cmdtype == CMDNORMAL
248                      || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
249                         delete_cmd_entry();
250                 find_command(name, &entry, 1, pathval());
251                 if (verbose) {
252                         if (entry.cmdtype != CMDUNKNOWN) {      /* if no error msg */
253                                 cmdp = cmdlookup(name, 0);
254                                 if (cmdp != NULL)
255                                         printentry(cmdp, verbose);
256                                 else
257                                         outfmt(&errout, "%s: not found\n", name);
258                         }
259                         flushall();
260                 }
261                 argptr++;
262         }
263         return 0;
264 }
265
266
267 STATIC void
268 printentry(struct tblentry *cmdp, int verbose)
269 {
270         int index;
271         char *path;
272         char *name;
273
274         if (cmdp->cmdtype == CMDNORMAL) {
275                 index = cmdp->param.index;
276                 path = pathval();
277                 do {
278                         name = padvance(&path, cmdp->cmdname);
279                         stunalloc(name);
280                 } while (--index >= 0);
281                 out1str(name);
282         } else if (cmdp->cmdtype == CMDBUILTIN) {
283                 out1fmt("builtin %s", cmdp->cmdname);
284         } else if (cmdp->cmdtype == CMDFUNCTION) {
285                 out1fmt("function %s", cmdp->cmdname);
286                 if (verbose) {
287                         INTOFF;
288                         name = commandtext(cmdp->param.func);
289                         out1c(' ');
290                         out1str(name);
291                         ckfree(name);
292                         INTON;
293                 }
294 #ifdef DEBUG
295         } else {
296                 error("internal error: cmdtype %d", cmdp->cmdtype);
297 #endif
298         }
299         if (cmdp->rehash)
300                 out1c('*');
301         out1c('\n');
302 }
303
304
305
306 /*
307  * Resolve a command name.  If you change this routine, you may have to
308  * change the shellexec routine as well.
309  */
310
311 void
312 find_command(char *name, struct cmdentry *entry, int printerr, char *path)
313 {
314         struct tblentry *cmdp;
315         int index;
316         int prev;
317         char *fullname;
318         struct stat statb;
319         int e;
320         int i;
321         int spec;
322
323         /* If name contains a slash, don't use the hash table */
324         if (strchr(name, '/') != NULL) {
325                 entry->cmdtype = CMDNORMAL;
326                 entry->u.index = 0;
327                 return;
328         }
329
330         /* If name is in the table, and not invalidated by cd, we're done */
331         if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->rehash == 0)
332                 goto success;
333
334         /* If %builtin not in path, check for builtin next */
335         if (builtinloc < 0 && (i = find_builtin(name, &spec)) >= 0) {
336                 INTOFF;
337                 cmdp = cmdlookup(name, 1);
338                 cmdp->cmdtype = CMDBUILTIN;
339                 cmdp->param.index = i;
340                 cmdp->special = spec;
341                 INTON;
342                 goto success;
343         }
344
345         /* We have to search path. */
346         prev = -1;              /* where to start */
347         if (cmdp) {             /* doing a rehash */
348                 if (cmdp->cmdtype == CMDBUILTIN)
349                         prev = builtinloc;
350                 else
351                         prev = cmdp->param.index;
352         }
353
354         e = ENOENT;
355         index = -1;
356 loop:
357         while ((fullname = padvance(&path, name)) != NULL) {
358                 stunalloc(fullname);
359                 index++;
360                 if (pathopt) {
361                         if (prefix("builtin", pathopt)) {
362                                 if ((i = find_builtin(name, &spec)) < 0)
363                                         goto loop;
364                                 INTOFF;
365                                 cmdp = cmdlookup(name, 1);
366                                 cmdp->cmdtype = CMDBUILTIN;
367                                 cmdp->param.index = i;
368                                 cmdp->special = spec;
369                                 INTON;
370                                 goto success;
371                         } else if (prefix("func", pathopt)) {
372                                 /* handled below */
373                         } else {
374                                 goto loop;      /* ignore unimplemented options */
375                         }
376                 }
377                 /* if rehash, don't redo absolute path names */
378                 if (fullname[0] == '/' && index <= prev) {
379                         if (index < prev)
380                                 goto loop;
381                         TRACE(("searchexec \"%s\": no change\n", name));
382                         goto success;
383                 }
384                 if (stat(fullname, &statb) < 0) {
385                         if (errno != ENOENT && errno != ENOTDIR)
386                                 e = errno;
387                         goto loop;
388                 }
389                 e = EACCES;     /* if we fail, this will be the error */
390                 if (!S_ISREG(statb.st_mode))
391                         goto loop;
392                 if (pathopt) {          /* this is a %func directory */
393                         stalloc(strlen(fullname) + 1);
394                         readcmdfile(fullname);
395                         if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
396                                 error("%s not defined in %s", name, fullname);
397                         stunalloc(fullname);
398                         goto success;
399                 }
400 #ifdef notdef
401                 if (statb.st_uid == geteuid()) {
402                         if ((statb.st_mode & 0100) == 0)
403                                 goto loop;
404                 } else if (statb.st_gid == getegid()) {
405                         if ((statb.st_mode & 010) == 0)
406                                 goto loop;
407                 } else {
408                         if ((statb.st_mode & 01) == 0)
409                                 goto loop;
410                 }
411 #endif
412                 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
413                 INTOFF;
414                 cmdp = cmdlookup(name, 1);
415                 cmdp->cmdtype = CMDNORMAL;
416                 cmdp->param.index = index;
417                 INTON;
418                 goto success;
419         }
420
421         /* We failed.  If there was an entry for this command, delete it */
422         if (cmdp)
423                 delete_cmd_entry();
424         if (printerr) {
425                 if (e == ENOENT || e == ENOTDIR)
426                         outfmt(out2, "%s: not found\n", name);
427                 else
428                         outfmt(out2, "%s: %s\n", name, strerror(e));
429         }
430         entry->cmdtype = CMDUNKNOWN;
431         return;
432
433 success:
434         cmdp->rehash = 0;
435         entry->cmdtype = cmdp->cmdtype;
436         entry->u = cmdp->param;
437         entry->special = cmdp->special;
438 }
439
440
441
442 /*
443  * Search the table of builtin commands.
444  */
445
446 int
447 find_builtin(char *name, int *special)
448 {
449         const struct builtincmd *bp;
450
451         for (bp = builtincmd ; bp->name ; bp++) {
452                 if (*bp->name == *name && equal(bp->name, name)) {
453                         *special = bp->special;
454                         return bp->code;
455                 }
456         }
457         return -1;
458 }
459
460
461
462 /*
463  * Called when a cd is done.  Marks all commands so the next time they
464  * are executed they will be rehashed.
465  */
466
467 void
468 hashcd(void)
469 {
470         struct tblentry **pp;
471         struct tblentry *cmdp;
472
473         for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
474                 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
475                         if (cmdp->cmdtype == CMDNORMAL
476                          || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0))
477                                 cmdp->rehash = 1;
478                 }
479         }
480 }
481
482
483
484 /*
485  * Called before PATH is changed.  The argument is the new value of PATH;
486  * pathval() still returns the old value at this point.  Called with
487  * interrupts off.
488  */
489
490 void
491 changepath(const char *newval)
492 {
493         const char *old, *new;
494         int index;
495         int firstchange;
496         int bltin;
497
498         old = pathval();
499         new = newval;
500         firstchange = 9999;     /* assume no change */
501         index = 0;
502         bltin = -1;
503         for (;;) {
504                 if (*old != *new) {
505                         firstchange = index;
506                         if ((*old == '\0' && *new == ':')
507                          || (*old == ':' && *new == '\0'))
508                                 firstchange++;
509                         old = new;      /* ignore subsequent differences */
510                 }
511                 if (*new == '\0')
512                         break;
513                 if (*new == '%' && bltin < 0 && prefix("builtin", new + 1))
514                         bltin = index;
515                 if (*new == ':') {
516                         index++;
517                 }
518                 new++, old++;
519         }
520         if (builtinloc < 0 && bltin >= 0)
521                 builtinloc = bltin;             /* zap builtins */
522         if (builtinloc >= 0 && bltin < 0)
523                 firstchange = 0;
524         clearcmdentry(firstchange);
525         builtinloc = bltin;
526 }
527
528
529 /*
530  * Clear out command entries.  The argument specifies the first entry in
531  * PATH which has changed.
532  */
533
534 void
535 clearcmdentry(int firstchange)
536 {
537         struct tblentry **tblp;
538         struct tblentry **pp;
539         struct tblentry *cmdp;
540
541         INTOFF;
542         for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
543                 pp = tblp;
544                 while ((cmdp = *pp) != NULL) {
545                         if ((cmdp->cmdtype == CMDNORMAL &&
546                              cmdp->param.index >= firstchange)
547                          || (cmdp->cmdtype == CMDBUILTIN &&
548                              builtinloc >= firstchange)) {
549                                 *pp = cmdp->next;
550                                 ckfree(cmdp);
551                         } else {
552                                 pp = &cmdp->next;
553                         }
554                 }
555         }
556         INTON;
557 }
558
559
560 /*
561  * Delete all functions.
562  */
563
564 #ifdef mkinit
565 MKINIT void deletefuncs(void);
566
567 SHELLPROC {
568         deletefuncs();
569 }
570 #endif
571
572 void
573 deletefuncs(void)
574 {
575         struct tblentry **tblp;
576         struct tblentry **pp;
577         struct tblentry *cmdp;
578
579         INTOFF;
580         for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
581                 pp = tblp;
582                 while ((cmdp = *pp) != NULL) {
583                         if (cmdp->cmdtype == CMDFUNCTION) {
584                                 *pp = cmdp->next;
585                                 freefunc(cmdp->param.func);
586                                 ckfree(cmdp);
587                         } else {
588                                 pp = &cmdp->next;
589                         }
590                 }
591         }
592         INTON;
593 }
594
595
596
597 /*
598  * Locate a command in the command hash table.  If "add" is nonzero,
599  * add the command to the table if it is not already present.  The
600  * variable "lastcmdentry" is set to point to the address of the link
601  * pointing to the entry, so that delete_cmd_entry can delete the
602  * entry.
603  */
604
605 STATIC struct tblentry **lastcmdentry;
606
607
608 STATIC struct tblentry *
609 cmdlookup(char *name, int add)
610 {
611         int hashval;
612         char *p;
613         struct tblentry *cmdp;
614         struct tblentry **pp;
615
616         p = name;
617         hashval = *p << 4;
618         while (*p)
619                 hashval += *p++;
620         hashval &= 0x7FFF;
621         pp = &cmdtable[hashval % CMDTABLESIZE];
622         for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
623                 if (equal(cmdp->cmdname, name))
624                         break;
625                 pp = &cmdp->next;
626         }
627         if (add && cmdp == NULL) {
628                 INTOFF;
629                 cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB
630                                         + strlen(name) + 1);
631                 cmdp->next = NULL;
632                 cmdp->cmdtype = CMDUNKNOWN;
633                 cmdp->rehash = 0;
634                 strcpy(cmdp->cmdname, name);
635                 INTON;
636         }
637         lastcmdentry = pp;
638         return cmdp;
639 }
640
641 /*
642  * Delete the command entry returned on the last lookup.
643  */
644
645 STATIC void
646 delete_cmd_entry(void)
647 {
648         struct tblentry *cmdp;
649
650         INTOFF;
651         cmdp = *lastcmdentry;
652         *lastcmdentry = cmdp->next;
653         ckfree(cmdp);
654         INTON;
655 }
656
657
658
659 /*
660  * Add a new command entry, replacing any existing command entry for
661  * the same name.
662  */
663
664 void
665 addcmdentry(char *name, struct cmdentry *entry)
666 {
667         struct tblentry *cmdp;
668
669         INTOFF;
670         cmdp = cmdlookup(name, 1);
671         if (cmdp->cmdtype == CMDFUNCTION) {
672                 freefunc(cmdp->param.func);
673         }
674         cmdp->cmdtype = entry->cmdtype;
675         cmdp->param = entry->u;
676         INTON;
677 }
678
679
680 /*
681  * Define a shell function.
682  */
683
684 void
685 defun(char *name, union node *func)
686 {
687         struct cmdentry entry;
688
689         INTOFF;
690         entry.cmdtype = CMDFUNCTION;
691         entry.u.func = copyfunc(func);
692         addcmdentry(name, &entry);
693         INTON;
694 }
695
696
697 /*
698  * Delete a function if it exists.
699  */
700
701 int
702 unsetfunc(char *name)
703 {
704         struct tblentry *cmdp;
705
706         if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
707                 freefunc(cmdp->param.func);
708                 delete_cmd_entry();
709                 return (0);
710         }
711         return (0);
712 }
713
714 /*
715  * Shared code for the following builtin commands:
716  *    type, command -v, command -V
717  */
718
719 int
720 typecmd_impl(int argc, char **argv, int cmd)
721 {
722         struct cmdentry entry;
723         struct tblentry *cmdp;
724         char **pp;
725         struct alias *ap;
726         int i;
727         int error = 0;
728         extern char *const parsekwd[];
729
730         for (i = 1; i < argc; i++) {
731                 if (cmd != TYPECMD_SMALLV)
732                         out1str(argv[i]);
733
734                 /* First look at the keywords */
735                 for (pp = (char **)parsekwd; *pp; pp++)
736                         if (**pp == *argv[i] && equal(*pp, argv[i]))
737                                 break;
738
739                 if (*pp) {
740                         if (cmd == TYPECMD_SMALLV)
741                                 out1fmt("%s\n", argv[i]);
742                         else
743                                 out1str(" is a shell keyword\n");
744                         continue;
745                 }
746
747                 /* Then look at the aliases */
748                 if ((ap = lookupalias(argv[i], 1)) != NULL) {
749                         if (cmd == TYPECMD_SMALLV)
750                                 out1fmt("alias %s='%s'\n", argv[i], ap->val);
751                         else
752                                 out1fmt(" is an alias for %s\n", ap->val);
753                         continue;
754                 }
755
756                 /* Then check if it is a tracked alias */
757                 if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
758                         entry.cmdtype = cmdp->cmdtype;
759                         entry.u = cmdp->param;
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(" is%s %s\n",
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(" is %s\n", argv[i]);
788                                 } else {
789                                         if (cmd != TYPECMD_SMALLV)
790                                                 out1fmt(": %s\n",
791                                                     strerror(errno));
792                                         error |= 127;
793                                 }
794                         }
795                         break;
796                 }
797                 case CMDFUNCTION:
798                         if (cmd == TYPECMD_SMALLV)
799                                 out1fmt("%s\n", argv[i]);
800                         else
801                                 out1str(" is a shell function\n");
802                         break;
803
804                 case CMDBUILTIN:
805                         if (cmd == TYPECMD_SMALLV)
806                                 out1fmt("%s\n", argv[i]);
807                         else
808                                 out1str(" is a shell builtin\n");
809                         break;
810
811                 default:
812                         if (cmd != TYPECMD_SMALLV)
813                                 out1str(": not found\n");
814                         error |= 127;
815                         break;
816                 }
817         }
818         return error;
819 }
820
821 /*
822  * Locate and print what a word is...
823  */
824
825 int
826 typecmd(int argc, char **argv)
827 {
828         return typecmd_impl(argc, argv, TYPECMD_TYPE);
829 }