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: head/bin/sh/exec.c 365037 2020-09-01 13:19:15Z jilles $");
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 <stdbool.h>
48 #include <stdlib.h>
49
50 /*
51 * When commands are first encountered, they are entered in a hash table.
52 * This ensures that a full path search will not have to be done for them
53 * on each invocation.
54 *
55 * We should investigate converting to a linear search, even though that
56 * would make the command name "hash" a misnomer.
57 */
58
59 #include "shell.h"
60 #include "main.h"
61 #include "nodes.h"
62 #include "parser.h"
63 #include "redir.h"
64 #include "eval.h"
65 #include "exec.h"
66 #include "builtins.h"
67 #include "var.h"
68 #include "options.h"
69 #include "input.h"
70 #include "output.h"
71 #include "syntax.h"
72 #include "memalloc.h"
73 #include "error.h"
74 #include "mystring.h"
75 #include "show.h"
76 #include "jobs.h"
77 #include "alias.h"
78
79
80 #define CMDTABLESIZE 31 /* should be prime */
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 signed char cmdtype; /* index identifying command */
89 char cmdname[]; /* name of command */
90 };
91
92
93 static struct tblentry *cmdtable[CMDTABLESIZE];
94 static int cmdtable_cd = 0; /* cmdtable contains cd-dependent entries */
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
shellexec(char ** argv,char ** envp,const char * path,int idx)113 shellexec(char **argv, char **envp, const char *path, int idx)
114 {
115 char *cmdname;
116 const char *opt;
117 int e;
118
119 if (strchr(argv[0], '/') != NULL) {
120 tryexec(argv[0], argv, envp);
121 e = errno;
122 } else {
123 e = ENOENT;
124 while ((cmdname = padvance(&path, &opt, argv[0])) != NULL) {
125 if (--idx < 0 && opt == NULL) {
126 tryexec(cmdname, argv, envp);
127 if (errno != ENOENT && errno != ENOTDIR)
128 e = errno;
129 if (e == ENOEXEC)
130 break;
131 }
132 stunalloc(cmdname);
133 }
134 }
135
136 /* Map to POSIX errors */
137 if (e == ENOENT || e == ENOTDIR)
138 errorwithstatus(127, "%s: not found", argv[0]);
139 else
140 errorwithstatus(126, "%s: %s", argv[0], strerror(e));
141 }
142
143
144 static bool
isbinary(const char * data,size_t len)145 isbinary(const char *data, size_t len)
146 {
147 const char *nul, *p;
148 bool hasletter;
149
150 nul = memchr(data, '\0', len);
151 if (nul == NULL)
152 return false;
153 /*
154 * POSIX says we shall allow execution if the initial part intended
155 * to be parsed by the shell consists of characters and does not
156 * contain the NUL character. This allows concatenating a shell
157 * script (ending with exec or exit) and a binary payload.
158 *
159 * In order to reject common binary files such as PNG images, check
160 * that there is a lowercase letter or expansion before the last
161 * newline before the NUL character, in addition to the check for
162 * the newline character suggested by POSIX.
163 */
164 hasletter = false;
165 for (p = data; *p != '\0'; p++) {
166 if ((*p >= 'a' && *p <= 'z') || *p == '$' || *p == '`')
167 hasletter = true;
168 if (hasletter && *p == '\n')
169 return false;
170 }
171 return true;
172 }
173
174
175 static void
tryexec(char * cmd,char ** argv,char ** envp)176 tryexec(char *cmd, char **argv, char **envp)
177 {
178 int e, in;
179 ssize_t n;
180 char buf[256];
181
182 execve(cmd, argv, envp);
183 e = errno;
184 if (e == ENOEXEC) {
185 INTOFF;
186 in = open(cmd, O_RDONLY | O_NONBLOCK);
187 if (in != -1) {
188 n = pread(in, buf, sizeof buf, 0);
189 close(in);
190 if (n > 0 && isbinary(buf, n)) {
191 errno = ENOEXEC;
192 return;
193 }
194 }
195 *argv = cmd;
196 *--argv = __DECONST(char *, _PATH_BSHELL);
197 execve(_PATH_BSHELL, argv, envp);
198 }
199 errno = e;
200 }
201
202 /*
203 * Do a path search. The variable path (passed by reference) should be
204 * set to the start of the path before the first call; padvance will update
205 * this value as it proceeds. Successive calls to padvance will return
206 * the possible path expansions in sequence. If popt is not NULL, options
207 * are processed: if an option (indicated by a percent sign) appears in
208 * the path entry then *popt will be set to point to it; else *popt will be
209 * set to NULL. If popt is NULL, percent signs are not special.
210 */
211
212 char *
padvance(const char ** path,const char ** popt,const char * name)213 padvance(const char **path, const char **popt, const char *name)
214 {
215 const char *p, *start;
216 char *q;
217 size_t len, namelen;
218
219 if (*path == NULL)
220 return NULL;
221 start = *path;
222 if (popt != NULL)
223 for (p = start; *p && *p != ':' && *p != '%'; p++)
224 ; /* nothing */
225 else
226 for (p = start; *p && *p != ':'; p++)
227 ; /* nothing */
228 namelen = strlen(name);
229 len = p - start + namelen + 2; /* "2" is for '/' and '\0' */
230 STARTSTACKSTR(q);
231 CHECKSTRSPACE(len, q);
232 if (p != start) {
233 memcpy(q, start, p - start);
234 q += p - start;
235 *q++ = '/';
236 }
237 memcpy(q, name, namelen + 1);
238 if (popt != NULL) {
239 if (*p == '%') {
240 *popt = ++p;
241 while (*p && *p != ':') p++;
242 } else
243 *popt = NULL;
244 }
245 if (*p == ':')
246 *path = p + 1;
247 else
248 *path = NULL;
249 return stalloc(len);
250 }
251
252
253
254 /*** Command hashing code ***/
255
256
257 int
hashcmd(int argc __unused,char ** argv __unused)258 hashcmd(int argc __unused, char **argv __unused)
259 {
260 struct tblentry **pp;
261 struct tblentry *cmdp;
262 int c;
263 int verbose;
264 struct cmdentry entry;
265 char *name;
266 int errors;
267
268 errors = 0;
269 verbose = 0;
270 while ((c = nextopt("rv")) != '\0') {
271 if (c == 'r') {
272 clearcmdentry();
273 } else if (c == 'v') {
274 verbose++;
275 }
276 }
277 if (*argptr == NULL) {
278 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
279 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
280 if (cmdp->cmdtype == CMDNORMAL)
281 printentry(cmdp, verbose);
282 }
283 }
284 return 0;
285 }
286 while ((name = *argptr) != NULL) {
287 if ((cmdp = cmdlookup(name, 0)) != NULL
288 && cmdp->cmdtype == CMDNORMAL)
289 delete_cmd_entry();
290 find_command(name, &entry, DO_ERR, pathval());
291 if (entry.cmdtype == CMDUNKNOWN)
292 errors = 1;
293 else if (verbose) {
294 cmdp = cmdlookup(name, 0);
295 if (cmdp != NULL)
296 printentry(cmdp, verbose);
297 else {
298 outfmt(out2, "%s: not found\n", name);
299 errors = 1;
300 }
301 flushall();
302 }
303 argptr++;
304 }
305 return errors;
306 }
307
308
309 static void
printentry(struct tblentry * cmdp,int verbose)310 printentry(struct tblentry *cmdp, int verbose)
311 {
312 int idx;
313 const char *path, *opt;
314 char *name;
315
316 if (cmdp->cmdtype == CMDNORMAL) {
317 idx = cmdp->param.index;
318 path = pathval();
319 do {
320 name = padvance(&path, &opt, cmdp->cmdname);
321 stunalloc(name);
322 } while (--idx >= 0);
323 out1str(name);
324 } else if (cmdp->cmdtype == CMDBUILTIN) {
325 out1fmt("builtin %s", cmdp->cmdname);
326 } else if (cmdp->cmdtype == CMDFUNCTION) {
327 out1fmt("function %s", cmdp->cmdname);
328 if (verbose) {
329 INTOFF;
330 name = commandtext(getfuncnode(cmdp->param.func));
331 out1c(' ');
332 out1str(name);
333 ckfree(name);
334 INTON;
335 }
336 #ifdef DEBUG
337 } else {
338 error("internal error: cmdtype %d", cmdp->cmdtype);
339 #endif
340 }
341 out1c('\n');
342 }
343
344
345
346 /*
347 * Resolve a command name. If you change this routine, you may have to
348 * change the shellexec routine as well.
349 */
350
351 void
find_command(const char * name,struct cmdentry * entry,int act,const char * path)352 find_command(const char *name, struct cmdentry *entry, int act,
353 const char *path)
354 {
355 struct tblentry *cmdp, loc_cmd;
356 int idx;
357 const char *opt;
358 char *fullname;
359 struct stat statb;
360 int e;
361 int i;
362 int spec;
363 int cd;
364
365 /* If name contains a slash, don't use the hash table */
366 if (strchr(name, '/') != NULL) {
367 entry->cmdtype = CMDNORMAL;
368 entry->u.index = 0;
369 entry->special = 0;
370 return;
371 }
372
373 cd = 0;
374
375 /* If name is in the table, we're done */
376 if ((cmdp = cmdlookup(name, 0)) != NULL) {
377 if (cmdp->cmdtype == CMDFUNCTION && act & DO_NOFUNC)
378 cmdp = NULL;
379 else
380 goto success;
381 }
382
383 /* Check for builtin next */
384 if ((i = find_builtin(name, &spec)) >= 0) {
385 INTOFF;
386 cmdp = cmdlookup(name, 1);
387 if (cmdp->cmdtype == CMDFUNCTION)
388 cmdp = &loc_cmd;
389 cmdp->cmdtype = CMDBUILTIN;
390 cmdp->param.index = i;
391 cmdp->special = spec;
392 INTON;
393 goto success;
394 }
395
396 /* We have to search path. */
397
398 e = ENOENT;
399 idx = -1;
400 for (;(fullname = padvance(&path, &opt, name)) != NULL;
401 stunalloc(fullname)) {
402 idx++;
403 if (opt) {
404 if (strncmp(opt, "func", 4) == 0) {
405 /* handled below */
406 } else {
407 continue; /* ignore unimplemented options */
408 }
409 }
410 if (fullname[0] != '/')
411 cd = 1;
412 if (stat(fullname, &statb) < 0) {
413 if (errno != ENOENT && errno != ENOTDIR)
414 e = errno;
415 continue;
416 }
417 e = EACCES; /* if we fail, this will be the error */
418 if (!S_ISREG(statb.st_mode))
419 continue;
420 if (opt) { /* this is a %func directory */
421 readcmdfile(fullname);
422 if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
423 error("%s not defined in %s", name, fullname);
424 stunalloc(fullname);
425 goto success;
426 }
427 #ifdef notdef
428 if (statb.st_uid == geteuid()) {
429 if ((statb.st_mode & 0100) == 0)
430 goto loop;
431 } else if (statb.st_gid == getegid()) {
432 if ((statb.st_mode & 010) == 0)
433 goto loop;
434 } else {
435 if ((statb.st_mode & 01) == 0)
436 goto loop;
437 }
438 #endif
439 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
440 INTOFF;
441 stunalloc(fullname);
442 cmdp = cmdlookup(name, 1);
443 if (cmdp->cmdtype == CMDFUNCTION)
444 cmdp = &loc_cmd;
445 cmdp->cmdtype = CMDNORMAL;
446 cmdp->param.index = idx;
447 cmdp->special = 0;
448 INTON;
449 goto success;
450 }
451
452 if (act & DO_ERR) {
453 if (e == ENOENT || e == ENOTDIR)
454 outfmt(out2, "%s: not found\n", name);
455 else
456 outfmt(out2, "%s: %s\n", name, strerror(e));
457 }
458 entry->cmdtype = CMDUNKNOWN;
459 entry->u.index = 0;
460 entry->special = 0;
461 return;
462
463 success:
464 if (cd)
465 cmdtable_cd = 1;
466 entry->cmdtype = cmdp->cmdtype;
467 entry->u = cmdp->param;
468 entry->special = cmdp->special;
469 }
470
471
472
473 /*
474 * Search the table of builtin commands.
475 */
476
477 int
find_builtin(const char * name,int * special)478 find_builtin(const char *name, int *special)
479 {
480 const unsigned char *bp;
481 size_t len;
482
483 len = strlen(name);
484 for (bp = builtincmd ; *bp ; bp += 2 + bp[0]) {
485 if (bp[0] == len && memcmp(bp + 2, name, len) == 0) {
486 *special = (bp[1] & BUILTIN_SPECIAL) != 0;
487 return bp[1] & ~BUILTIN_SPECIAL;
488 }
489 }
490 return -1;
491 }
492
493
494
495 /*
496 * Called when a cd is done. If any entry in cmdtable depends on the current
497 * directory, simply clear cmdtable completely.
498 */
499
500 void
hashcd(void)501 hashcd(void)
502 {
503 if (cmdtable_cd)
504 clearcmdentry();
505 }
506
507
508
509 /*
510 * Called before PATH is changed. The argument is the new value of PATH;
511 * pathval() still returns the old value at this point. Called with
512 * interrupts off.
513 */
514
515 void
changepath(const char * newval __unused)516 changepath(const char *newval __unused)
517 {
518 clearcmdentry();
519 }
520
521
522 /*
523 * Clear out cached utility locations.
524 */
525
526 void
clearcmdentry(void)527 clearcmdentry(void)
528 {
529 struct tblentry **tblp;
530 struct tblentry **pp;
531 struct tblentry *cmdp;
532
533 INTOFF;
534 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
535 pp = tblp;
536 while ((cmdp = *pp) != NULL) {
537 if (cmdp->cmdtype == CMDNORMAL) {
538 *pp = cmdp->next;
539 ckfree(cmdp);
540 } else {
541 pp = &cmdp->next;
542 }
543 }
544 }
545 cmdtable_cd = 0;
546 INTON;
547 }
548
549
550 /*
551 * Locate a command in the command hash table. If "add" is nonzero,
552 * add the command to the table if it is not already present. The
553 * variable "lastcmdentry" is set to point to the address of the link
554 * pointing to the entry, so that delete_cmd_entry can delete the
555 * entry.
556 */
557
558 static struct tblentry **lastcmdentry;
559
560
561 static struct tblentry *
cmdlookup(const char * name,int add)562 cmdlookup(const char *name, int add)
563 {
564 unsigned int hashval;
565 const char *p;
566 struct tblentry *cmdp;
567 struct tblentry **pp;
568 size_t len;
569
570 p = name;
571 hashval = (unsigned char)*p << 4;
572 while (*p)
573 hashval += *p++;
574 pp = &cmdtable[hashval % CMDTABLESIZE];
575 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
576 if (equal(cmdp->cmdname, name))
577 break;
578 pp = &cmdp->next;
579 }
580 if (add && cmdp == NULL) {
581 INTOFF;
582 len = strlen(name);
583 cmdp = *pp = ckmalloc(sizeof (struct tblentry) + len + 1);
584 cmdp->next = NULL;
585 cmdp->cmdtype = CMDUNKNOWN;
586 memcpy(cmdp->cmdname, name, len + 1);
587 INTON;
588 }
589 lastcmdentry = pp;
590 return cmdp;
591 }
592
593 /*
594 * Delete the command entry returned on the last lookup.
595 */
596
597 static void
delete_cmd_entry(void)598 delete_cmd_entry(void)
599 {
600 struct tblentry *cmdp;
601
602 INTOFF;
603 cmdp = *lastcmdentry;
604 *lastcmdentry = cmdp->next;
605 ckfree(cmdp);
606 INTON;
607 }
608
609
610
611 /*
612 * Add a new command entry, replacing any existing command entry for
613 * the same name.
614 */
615
616 static void
addcmdentry(const char * name,struct cmdentry * entry)617 addcmdentry(const char *name, struct cmdentry *entry)
618 {
619 struct tblentry *cmdp;
620
621 INTOFF;
622 cmdp = cmdlookup(name, 1);
623 if (cmdp->cmdtype == CMDFUNCTION) {
624 unreffunc(cmdp->param.func);
625 }
626 cmdp->cmdtype = entry->cmdtype;
627 cmdp->param = entry->u;
628 cmdp->special = entry->special;
629 INTON;
630 }
631
632
633 /*
634 * Define a shell function.
635 */
636
637 void
defun(const char * name,union node * func)638 defun(const char *name, union node *func)
639 {
640 struct cmdentry entry;
641
642 INTOFF;
643 entry.cmdtype = CMDFUNCTION;
644 entry.u.func = copyfunc(func);
645 entry.special = 0;
646 addcmdentry(name, &entry);
647 INTON;
648 }
649
650
651 /*
652 * Delete a function if it exists.
653 * Called with interrupts off.
654 */
655
656 int
unsetfunc(const char * name)657 unsetfunc(const char *name)
658 {
659 struct tblentry *cmdp;
660
661 if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
662 unreffunc(cmdp->param.func);
663 delete_cmd_entry();
664 return (0);
665 }
666 return (0);
667 }
668
669
670 /*
671 * Check if a function by a certain name exists.
672 */
673 int
isfunc(const char * name)674 isfunc(const char *name)
675 {
676 struct tblentry *cmdp;
677 cmdp = cmdlookup(name, 0);
678 return (cmdp != NULL && cmdp->cmdtype == CMDFUNCTION);
679 }
680
681
682 static void
print_absolute_path(const char * name)683 print_absolute_path(const char *name)
684 {
685 const char *pwd;
686
687 if (*name != '/' && (pwd = lookupvar("PWD")) != NULL && *pwd != '\0') {
688 out1str(pwd);
689 if (strcmp(pwd, "/") != 0)
690 outcslow('/', out1);
691 }
692 out1str(name);
693 outcslow('\n', out1);
694 }
695
696
697 /*
698 * Shared code for the following builtin commands:
699 * type, command -v, command -V
700 */
701
702 int
typecmd_impl(int argc,char ** argv,int cmd,const char * path)703 typecmd_impl(int argc, char **argv, int cmd, const char *path)
704 {
705 struct cmdentry entry;
706 struct tblentry *cmdp;
707 const char *const *pp;
708 struct alias *ap;
709 int i;
710 int error1 = 0;
711
712 if (path != pathval())
713 clearcmdentry();
714
715 for (i = 1; i < argc; i++) {
716 /* First look at the keywords */
717 for (pp = parsekwd; *pp; pp++)
718 if (**pp == *argv[i] && equal(*pp, argv[i]))
719 break;
720
721 if (*pp) {
722 if (cmd == TYPECMD_SMALLV)
723 out1fmt("%s\n", argv[i]);
724 else
725 out1fmt("%s is a shell keyword\n", argv[i]);
726 continue;
727 }
728
729 /* Then look at the aliases */
730 if ((ap = lookupalias(argv[i], 1)) != NULL) {
731 if (cmd == TYPECMD_SMALLV) {
732 out1fmt("alias %s=", argv[i]);
733 out1qstr(ap->val);
734 outcslow('\n', out1);
735 } else
736 out1fmt("%s is an alias for %s\n", argv[i],
737 ap->val);
738 continue;
739 }
740
741 /* Then check if it is a tracked alias */
742 if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
743 entry.cmdtype = cmdp->cmdtype;
744 entry.u = cmdp->param;
745 entry.special = cmdp->special;
746 }
747 else {
748 /* Finally use brute force */
749 find_command(argv[i], &entry, 0, path);
750 }
751
752 switch (entry.cmdtype) {
753 case CMDNORMAL: {
754 if (strchr(argv[i], '/') == NULL) {
755 const char *path2 = path;
756 const char *opt2;
757 char *name;
758 int j = entry.u.index;
759 do {
760 name = padvance(&path2, &opt2, argv[i]);
761 stunalloc(name);
762 } while (--j >= 0);
763 if (cmd != TYPECMD_SMALLV)
764 out1fmt("%s is%s ", argv[i],
765 (cmdp && cmd == TYPECMD_TYPE) ?
766 " a tracked alias for" : "");
767 print_absolute_path(name);
768 } else {
769 if (eaccess(argv[i], X_OK) == 0) {
770 if (cmd != TYPECMD_SMALLV)
771 out1fmt("%s is ", argv[i]);
772 print_absolute_path(argv[i]);
773 } else {
774 if (cmd != TYPECMD_SMALLV)
775 outfmt(out2, "%s: %s\n",
776 argv[i], strerror(errno));
777 error1 |= 127;
778 }
779 }
780 break;
781 }
782 case CMDFUNCTION:
783 if (cmd == TYPECMD_SMALLV)
784 out1fmt("%s\n", argv[i]);
785 else
786 out1fmt("%s is a shell function\n", argv[i]);
787 break;
788
789 case CMDBUILTIN:
790 if (cmd == TYPECMD_SMALLV)
791 out1fmt("%s\n", argv[i]);
792 else if (entry.special)
793 out1fmt("%s is a special shell builtin\n",
794 argv[i]);
795 else
796 out1fmt("%s is a shell builtin\n", argv[i]);
797 break;
798
799 default:
800 if (cmd != TYPECMD_SMALLV)
801 outfmt(out2, "%s: not found\n", argv[i]);
802 error1 |= 127;
803 break;
804 }
805 }
806
807 if (path != pathval())
808 clearcmdentry();
809
810 return error1;
811 }
812
813 /*
814 * Locate and print what a word is...
815 */
816
817 int
typecmd(int argc,char ** argv)818 typecmd(int argc, char **argv)
819 {
820 if (argc > 2 && strcmp(argv[1], "--") == 0)
821 argc--, argv++;
822 return typecmd_impl(argc, argv, TYPECMD_TYPE, bltinlookup("PATH", 1));
823 }
824