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 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <unistd.h>
36 #include <fcntl.h>
37 #include <errno.h>
38 #include <paths.h>
39 #include <stdbool.h>
40 #include <stdlib.h>
41
42 /*
43 * When commands are first encountered, they are entered in a hash table.
44 * This ensures that a full path search will not have to be done for them
45 * on each invocation.
46 *
47 * We should investigate converting to a linear search, even though that
48 * would make the command name "hash" a misnomer.
49 */
50
51 #include "shell.h"
52 #include "main.h"
53 #include "nodes.h"
54 #include "parser.h"
55 #include "redir.h"
56 #include "eval.h"
57 #include "exec.h"
58 #include "builtins.h"
59 #include "var.h"
60 #include "options.h"
61 #include "input.h"
62 #include "output.h"
63 #include "syntax.h"
64 #include "memalloc.h"
65 #include "error.h"
66 #include "mystring.h"
67 #include "show.h"
68 #include "jobs.h"
69 #include "alias.h"
70
71
72 #define CMDTABLESIZE 31 /* should be prime */
73
74
75
76 struct tblentry {
77 struct tblentry *next; /* next entry in hash chain */
78 union param param; /* definition of builtin function */
79 int special; /* flag for special builtin commands */
80 signed char cmdtype; /* index identifying command */
81 char cmdname[]; /* name of command */
82 };
83
84
85 static struct tblentry *cmdtable[CMDTABLESIZE];
86 static int cmdtable_cd = 0; /* cmdtable contains cd-dependent entries */
87
88
89 static void tryexec(char *, char **, char **);
90 static void printentry(struct tblentry *, int);
91 static struct tblentry *cmdlookup(const char *, int);
92 static void delete_cmd_entry(void);
93 static void addcmdentry(const char *, struct cmdentry *);
94
95
96
97 /*
98 * Exec a program. Never returns. If you change this routine, you may
99 * have to change the find_command routine as well.
100 *
101 * The argv array may be changed and element argv[-1] should be writable.
102 */
103
104 void
shellexec(char ** argv,char ** envp,const char * path,int idx)105 shellexec(char **argv, char **envp, const char *path, int idx)
106 {
107 char *cmdname;
108 const char *opt;
109 int e;
110
111 if (strchr(argv[0], '/') != NULL) {
112 tryexec(argv[0], argv, envp);
113 e = errno;
114 } else {
115 e = ENOENT;
116 while ((cmdname = padvance(&path, &opt, argv[0])) != NULL) {
117 if (--idx < 0 && opt == NULL) {
118 tryexec(cmdname, argv, envp);
119 if (errno != ENOENT && errno != ENOTDIR)
120 e = errno;
121 if (e == ENOEXEC)
122 break;
123 }
124 stunalloc(cmdname);
125 }
126 }
127
128 /* Map to POSIX errors */
129 if (e == ENOENT || e == ENOTDIR)
130 errorwithstatus(127, "%s: not found", argv[0]);
131 else
132 errorwithstatus(126, "%s: %s", argv[0], strerror(e));
133 }
134
135
136 static bool
isbinary(const char * data,size_t len)137 isbinary(const char *data, size_t len)
138 {
139 const char *nul, *p;
140 bool hasletter;
141
142 nul = memchr(data, '\0', len);
143 if (nul == NULL)
144 return false;
145 /*
146 * POSIX says we shall allow execution if the initial part intended
147 * to be parsed by the shell consists of characters and does not
148 * contain the NUL character. This allows concatenating a shell
149 * script (ending with exec or exit) and a binary payload.
150 *
151 * In order to reject common binary files such as PNG images, check
152 * that there is a lowercase letter or expansion before the last
153 * newline before the NUL character, in addition to the check for
154 * the newline character suggested by POSIX.
155 */
156 hasletter = false;
157 for (p = data; *p != '\0'; p++) {
158 if ((*p >= 'a' && *p <= 'z') || *p == '$' || *p == '`')
159 hasletter = true;
160 if (hasletter && *p == '\n')
161 return false;
162 }
163 return true;
164 }
165
166
167 static void
tryexec(char * cmd,char ** argv,char ** envp)168 tryexec(char *cmd, char **argv, char **envp)
169 {
170 int e, in;
171 ssize_t n;
172 char buf[256];
173
174 execve(cmd, argv, envp);
175 e = errno;
176 if (e == ENOEXEC) {
177 INTOFF;
178 in = open(cmd, O_RDONLY | O_NONBLOCK);
179 if (in != -1) {
180 n = pread(in, buf, sizeof buf, 0);
181 close(in);
182 if (n > 0 && isbinary(buf, n)) {
183 errno = ENOEXEC;
184 return;
185 }
186 }
187 *argv = cmd;
188 *--argv = __DECONST(char *, _PATH_BSHELL);
189 execve(_PATH_BSHELL, argv, envp);
190 }
191 errno = e;
192 }
193
194 /*
195 * Do a path search. The variable path (passed by reference) should be
196 * set to the start of the path before the first call; padvance will update
197 * this value as it proceeds. Successive calls to padvance will return
198 * the possible path expansions in sequence. If popt is not NULL, options
199 * are processed: if an option (indicated by a percent sign) appears in
200 * the path entry then *popt will be set to point to it; else *popt will be
201 * set to NULL. If popt is NULL, percent signs are not special.
202 */
203
204 char *
padvance(const char ** path,const char ** popt,const char * name)205 padvance(const char **path, const char **popt, const char *name)
206 {
207 const char *p, *start;
208 char *q;
209 size_t len, namelen;
210
211 if (*path == NULL)
212 return NULL;
213 start = *path;
214 if (popt != NULL)
215 for (p = start; *p && *p != ':' && *p != '%'; p++)
216 ; /* nothing */
217 else
218 for (p = start; *p && *p != ':'; p++)
219 ; /* nothing */
220 namelen = strlen(name);
221 len = p - start + namelen + 2; /* "2" is for '/' and '\0' */
222 STARTSTACKSTR(q);
223 CHECKSTRSPACE(len, q);
224 if (p != start) {
225 memcpy(q, start, p - start);
226 q += p - start;
227 *q++ = '/';
228 }
229 memcpy(q, name, namelen + 1);
230 if (popt != NULL) {
231 if (*p == '%') {
232 *popt = ++p;
233 while (*p && *p != ':') p++;
234 } else
235 *popt = NULL;
236 }
237 if (*p == ':')
238 *path = p + 1;
239 else
240 *path = NULL;
241 return stalloc(len);
242 }
243
244
245
246 /*** Command hashing code ***/
247
248
249 int
hashcmd(int argc __unused,char ** argv __unused)250 hashcmd(int argc __unused, char **argv __unused)
251 {
252 struct tblentry **pp;
253 struct tblentry *cmdp;
254 int c;
255 int verbose;
256 struct cmdentry entry;
257 char *name;
258 int errors;
259
260 errors = 0;
261 verbose = 0;
262 while ((c = nextopt("rv")) != '\0') {
263 if (c == 'r') {
264 clearcmdentry();
265 } else if (c == 'v') {
266 verbose++;
267 }
268 }
269 if (*argptr == NULL) {
270 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
271 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
272 if (cmdp->cmdtype == CMDNORMAL)
273 printentry(cmdp, verbose);
274 }
275 }
276 return 0;
277 }
278 while ((name = *argptr) != NULL) {
279 if ((cmdp = cmdlookup(name, 0)) != NULL
280 && cmdp->cmdtype == CMDNORMAL)
281 delete_cmd_entry();
282 find_command(name, &entry, DO_ERR, pathval());
283 if (entry.cmdtype == CMDUNKNOWN)
284 errors = 1;
285 else if (verbose) {
286 cmdp = cmdlookup(name, 0);
287 if (cmdp != NULL)
288 printentry(cmdp, verbose);
289 else {
290 outfmt(out2, "%s: not found\n", name);
291 errors = 1;
292 }
293 flushall();
294 }
295 argptr++;
296 }
297 return errors;
298 }
299
300
301 static void
printentry(struct tblentry * cmdp,int verbose)302 printentry(struct tblentry *cmdp, int verbose)
303 {
304 int idx;
305 const char *path, *opt;
306 char *name;
307
308 if (cmdp->cmdtype == CMDNORMAL) {
309 idx = cmdp->param.index;
310 path = pathval();
311 do {
312 name = padvance(&path, &opt, cmdp->cmdname);
313 stunalloc(name);
314 } while (--idx >= 0);
315 out1str(name);
316 } else if (cmdp->cmdtype == CMDBUILTIN) {
317 out1fmt("builtin %s", cmdp->cmdname);
318 } else if (cmdp->cmdtype == CMDFUNCTION) {
319 out1fmt("function %s", cmdp->cmdname);
320 if (verbose) {
321 INTOFF;
322 name = commandtext(getfuncnode(cmdp->param.func));
323 out1c(' ');
324 out1str(name);
325 ckfree(name);
326 INTON;
327 }
328 #ifdef DEBUG
329 } else {
330 error("internal error: cmdtype %d", cmdp->cmdtype);
331 #endif
332 }
333 out1c('\n');
334 }
335
336
337
338 /*
339 * Resolve a command name. If you change this routine, you may have to
340 * change the shellexec routine as well.
341 */
342
343 void
find_command(const char * name,struct cmdentry * entry,int act,const char * path)344 find_command(const char *name, struct cmdentry *entry, int act,
345 const char *path)
346 {
347 struct tblentry *cmdp, loc_cmd;
348 int idx;
349 const char *opt;
350 char *fullname;
351 struct stat statb;
352 int e;
353 int i;
354 int spec;
355 int cd;
356
357 /* If name contains a slash, don't use the hash table */
358 if (strchr(name, '/') != NULL) {
359 entry->cmdtype = CMDNORMAL;
360 entry->u.index = 0;
361 entry->special = 0;
362 return;
363 }
364
365 cd = 0;
366
367 /* If name is in the table, we're done */
368 if ((cmdp = cmdlookup(name, 0)) != NULL) {
369 if (cmdp->cmdtype == CMDFUNCTION && act & DO_NOFUNC)
370 cmdp = NULL;
371 else
372 goto success;
373 }
374
375 /* Check for builtin next */
376 if ((i = find_builtin(name, &spec)) >= 0) {
377 INTOFF;
378 cmdp = cmdlookup(name, 1);
379 if (cmdp->cmdtype == CMDFUNCTION)
380 cmdp = &loc_cmd;
381 cmdp->cmdtype = CMDBUILTIN;
382 cmdp->param.index = i;
383 cmdp->special = spec;
384 INTON;
385 goto success;
386 }
387
388 /* We have to search path. */
389
390 e = ENOENT;
391 idx = -1;
392 for (;(fullname = padvance(&path, &opt, name)) != NULL;
393 stunalloc(fullname)) {
394 idx++;
395 if (opt) {
396 if (strncmp(opt, "func", 4) == 0) {
397 /* handled below */
398 } else {
399 continue; /* ignore unimplemented options */
400 }
401 }
402 if (fullname[0] != '/')
403 cd = 1;
404 if (stat(fullname, &statb) < 0) {
405 if (errno != ENOENT && errno != ENOTDIR)
406 e = errno;
407 continue;
408 }
409 e = EACCES; /* if we fail, this will be the error */
410 if (!S_ISREG(statb.st_mode))
411 continue;
412 if (opt) { /* this is a %func directory */
413 readcmdfile(fullname, -1 /* verify */);
414 if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
415 error("%s not defined in %s", name, fullname);
416 stunalloc(fullname);
417 goto success;
418 }
419 #ifdef notdef
420 if (statb.st_uid == geteuid()) {
421 if ((statb.st_mode & 0100) == 0)
422 goto loop;
423 } else if (statb.st_gid == getegid()) {
424 if ((statb.st_mode & 010) == 0)
425 goto loop;
426 } else {
427 if ((statb.st_mode & 01) == 0)
428 goto loop;
429 }
430 #endif
431 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
432 INTOFF;
433 stunalloc(fullname);
434 cmdp = cmdlookup(name, 1);
435 if (cmdp->cmdtype == CMDFUNCTION)
436 cmdp = &loc_cmd;
437 cmdp->cmdtype = CMDNORMAL;
438 cmdp->param.index = idx;
439 cmdp->special = 0;
440 INTON;
441 goto success;
442 }
443
444 if (act & DO_ERR) {
445 if (e == ENOENT || e == ENOTDIR)
446 outfmt(out2, "%s: not found\n", name);
447 else
448 outfmt(out2, "%s: %s\n", name, strerror(e));
449 }
450 entry->cmdtype = CMDUNKNOWN;
451 entry->u.index = 0;
452 entry->special = 0;
453 return;
454
455 success:
456 if (cd)
457 cmdtable_cd = 1;
458 entry->cmdtype = cmdp->cmdtype;
459 entry->u = cmdp->param;
460 entry->special = cmdp->special;
461 }
462
463
464
465 /*
466 * Search the table of builtin commands.
467 */
468
469 int
find_builtin(const char * name,int * special)470 find_builtin(const char *name, int *special)
471 {
472 const unsigned char *bp;
473 size_t len;
474
475 len = strlen(name);
476 for (bp = builtincmd ; *bp ; bp += 2 + bp[0]) {
477 if (bp[0] == len && memcmp(bp + 2, name, len) == 0) {
478 *special = (bp[1] & BUILTIN_SPECIAL) != 0;
479 return bp[1] & ~BUILTIN_SPECIAL;
480 }
481 }
482 return -1;
483 }
484
485
486
487 /*
488 * Called when a cd is done. If any entry in cmdtable depends on the current
489 * directory, simply clear cmdtable completely.
490 */
491
492 void
hashcd(void)493 hashcd(void)
494 {
495 if (cmdtable_cd)
496 clearcmdentry();
497 }
498
499
500
501 /*
502 * Called before PATH is changed. The argument is the new value of PATH;
503 * pathval() still returns the old value at this point. Called with
504 * interrupts off.
505 */
506
507 void
changepath(const char * newval __unused)508 changepath(const char *newval __unused)
509 {
510 clearcmdentry();
511 }
512
513
514 /*
515 * Clear out cached utility locations.
516 */
517
518 void
clearcmdentry(void)519 clearcmdentry(void)
520 {
521 struct tblentry **tblp;
522 struct tblentry **pp;
523 struct tblentry *cmdp;
524
525 INTOFF;
526 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
527 pp = tblp;
528 while ((cmdp = *pp) != NULL) {
529 if (cmdp->cmdtype == CMDNORMAL) {
530 *pp = cmdp->next;
531 ckfree(cmdp);
532 } else {
533 pp = &cmdp->next;
534 }
535 }
536 }
537 cmdtable_cd = 0;
538 INTON;
539 }
540
541
542 static unsigned int
hashname(const char * p)543 hashname(const char *p)
544 {
545 unsigned int hashval;
546
547 hashval = (unsigned char)*p << 4;
548 while (*p)
549 hashval += *p++;
550
551 return (hashval % CMDTABLESIZE);
552 }
553
554
555 /*
556 * Locate a command in the command hash table. If "add" is nonzero,
557 * add the command to the table if it is not already present. The
558 * variable "lastcmdentry" is set to point to the address of the link
559 * pointing to the entry, so that delete_cmd_entry can delete the
560 * entry.
561 */
562
563 static struct tblentry **lastcmdentry;
564
565
566 static struct tblentry *
cmdlookup(const char * name,int add)567 cmdlookup(const char *name, int add)
568 {
569 struct tblentry *cmdp;
570 struct tblentry **pp;
571 size_t len;
572
573 pp = &cmdtable[hashname(name)];
574 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
575 if (equal(cmdp->cmdname, name))
576 break;
577 pp = &cmdp->next;
578 }
579 if (add && cmdp == NULL) {
580 INTOFF;
581 len = strlen(name);
582 cmdp = *pp = ckmalloc(sizeof (struct tblentry) + len + 1);
583 cmdp->next = NULL;
584 cmdp->cmdtype = CMDUNKNOWN;
585 memcpy(cmdp->cmdname, name, len + 1);
586 INTON;
587 }
588 lastcmdentry = pp;
589 return cmdp;
590 }
591
592 const void *
itercmd(const void * entry,struct cmdentry * result)593 itercmd(const void *entry, struct cmdentry *result)
594 {
595 const struct tblentry *e = entry;
596 size_t i = 0;
597
598 if (e != NULL) {
599 if (e->next != NULL) {
600 e = e->next;
601 goto success;
602 }
603 i = hashname(e->cmdname) + 1;
604 }
605 for (; i < CMDTABLESIZE; i++)
606 if ((e = cmdtable[i]) != NULL)
607 goto success;
608
609 return (NULL);
610 success:
611 result->cmdtype = e->cmdtype;
612 result->cmdname = e->cmdname;
613
614 return (e);
615 }
616
617 /*
618 * Delete the command entry returned on the last lookup.
619 */
620
621 static void
delete_cmd_entry(void)622 delete_cmd_entry(void)
623 {
624 struct tblentry *cmdp;
625
626 INTOFF;
627 cmdp = *lastcmdentry;
628 *lastcmdentry = cmdp->next;
629 ckfree(cmdp);
630 INTON;
631 }
632
633
634
635 /*
636 * Add a new command entry, replacing any existing command entry for
637 * the same name.
638 */
639
640 static void
addcmdentry(const char * name,struct cmdentry * entry)641 addcmdentry(const char *name, struct cmdentry *entry)
642 {
643 struct tblentry *cmdp;
644
645 INTOFF;
646 cmdp = cmdlookup(name, 1);
647 if (cmdp->cmdtype == CMDFUNCTION) {
648 unreffunc(cmdp->param.func);
649 }
650 cmdp->cmdtype = entry->cmdtype;
651 cmdp->param = entry->u;
652 cmdp->special = entry->special;
653 INTON;
654 }
655
656
657 /*
658 * Define a shell function.
659 */
660
661 void
defun(const char * name,union node * func)662 defun(const char *name, union node *func)
663 {
664 struct cmdentry entry;
665
666 INTOFF;
667 entry.cmdtype = CMDFUNCTION;
668 entry.u.func = copyfunc(func);
669 entry.special = 0;
670 addcmdentry(name, &entry);
671 INTON;
672 }
673
674
675 /*
676 * Delete a function if it exists.
677 * Called with interrupts off.
678 */
679
680 int
unsetfunc(const char * name)681 unsetfunc(const char *name)
682 {
683 struct tblentry *cmdp;
684
685 if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
686 unreffunc(cmdp->param.func);
687 delete_cmd_entry();
688 return (0);
689 }
690 return (0);
691 }
692
693
694 /*
695 * Check if a function by a certain name exists.
696 */
697 int
isfunc(const char * name)698 isfunc(const char *name)
699 {
700 struct tblentry *cmdp;
701 cmdp = cmdlookup(name, 0);
702 return (cmdp != NULL && cmdp->cmdtype == CMDFUNCTION);
703 }
704
705
706 static void
print_absolute_path(const char * name)707 print_absolute_path(const char *name)
708 {
709 const char *pwd;
710
711 if (*name != '/' && (pwd = lookupvar("PWD")) != NULL && *pwd != '\0') {
712 out1str(pwd);
713 if (strcmp(pwd, "/") != 0)
714 outcslow('/', out1);
715 }
716 out1str(name);
717 outcslow('\n', out1);
718 }
719
720
721 /*
722 * Shared code for the following builtin commands:
723 * type, command -v, command -V
724 */
725
726 int
typecmd_impl(int argc,char ** argv,int cmd,const char * path)727 typecmd_impl(int argc, char **argv, int cmd, const char *path)
728 {
729 struct cmdentry entry;
730 struct tblentry *cmdp;
731 const char *const *pp;
732 struct alias *ap;
733 int i;
734 int error1 = 0;
735
736 if (path != pathval())
737 clearcmdentry();
738
739 for (i = 1; i < argc; i++) {
740 /* First look at the keywords */
741 for (pp = parsekwd; *pp; pp++)
742 if (**pp == *argv[i] && equal(*pp, argv[i]))
743 break;
744
745 if (*pp) {
746 if (cmd == TYPECMD_SMALLV)
747 out1fmt("%s\n", argv[i]);
748 else
749 out1fmt("%s is a shell keyword\n", argv[i]);
750 continue;
751 }
752
753 /* Then look at the aliases */
754 if ((ap = lookupalias(argv[i], 1)) != NULL) {
755 if (cmd == TYPECMD_SMALLV) {
756 out1fmt("alias %s=", argv[i]);
757 out1qstr(ap->val);
758 outcslow('\n', out1);
759 } else
760 out1fmt("%s is an alias for %s\n", argv[i],
761 ap->val);
762 continue;
763 }
764
765 /* Then check if it is a tracked alias */
766 if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
767 entry.cmdtype = cmdp->cmdtype;
768 entry.u = cmdp->param;
769 entry.special = cmdp->special;
770 }
771 else {
772 /* Finally use brute force */
773 find_command(argv[i], &entry, 0, path);
774 }
775
776 switch (entry.cmdtype) {
777 case CMDNORMAL: {
778 if (strchr(argv[i], '/') == NULL) {
779 const char *path2 = path;
780 const char *opt2;
781 char *name;
782 int j = entry.u.index;
783 do {
784 name = padvance(&path2, &opt2, argv[i]);
785 stunalloc(name);
786 } while (--j >= 0);
787 if (cmd != TYPECMD_SMALLV)
788 out1fmt("%s is%s ", argv[i],
789 (cmdp && cmd == TYPECMD_TYPE) ?
790 " a tracked alias for" : "");
791 print_absolute_path(name);
792 } else {
793 if (eaccess(argv[i], X_OK) == 0) {
794 if (cmd != TYPECMD_SMALLV)
795 out1fmt("%s is ", argv[i]);
796 print_absolute_path(argv[i]);
797 } else {
798 if (cmd != TYPECMD_SMALLV)
799 outfmt(out2, "%s: %s\n",
800 argv[i], strerror(errno));
801 error1 |= 127;
802 }
803 }
804 break;
805 }
806 case CMDFUNCTION:
807 if (cmd == TYPECMD_SMALLV)
808 out1fmt("%s\n", argv[i]);
809 else
810 out1fmt("%s is a shell function\n", argv[i]);
811 break;
812
813 case CMDBUILTIN:
814 if (cmd == TYPECMD_SMALLV)
815 out1fmt("%s\n", argv[i]);
816 else if (entry.special)
817 out1fmt("%s is a special shell builtin\n",
818 argv[i]);
819 else
820 out1fmt("%s is a shell builtin\n", argv[i]);
821 break;
822
823 default:
824 if (cmd != TYPECMD_SMALLV)
825 outfmt(out2, "%s: not found\n", argv[i]);
826 error1 |= 127;
827 break;
828 }
829 }
830
831 if (path != pathval())
832 clearcmdentry();
833
834 return error1;
835 }
836
837 /*
838 * Locate and print what a word is...
839 */
840
841 int
typecmd(int argc,char ** argv)842 typecmd(int argc, char **argv)
843 {
844 if (argc > 2 && strcmp(argv[1], "--") == 0)
845 argc--, argv++;
846 return typecmd_impl(argc, argv, TYPECMD_TYPE, bltinlookup("PATH", 1));
847 }
848