whereis.c revision 99373 
1/*	$NetBSD: whereis.c,v 1.11 2002/06/11 06:06:21 itojun Exp $	*/
2/*	$FreeBSD: head/usr.bin/whereis/whereis.c 99373 2002-07-03 19:16:31Z johan $	*/
3
4/*-
5 * Copyright (c) 1993
6 *	The Regents of the University of California.  All rights reserved.
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38#ifndef lint
39__COPYRIGHT("@(#) Copyright (c) 1993\n\
40	The Regents of the University of California.  All rights reserved.\n");
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)whereis.c	8.3 (Berkeley) 5/4/95";
46#endif
47__RCSID("$NetBSD: whereis.c,v 1.11 2002/06/11 06:06:21 itojun Exp $");
48#endif /* not lint */
49
50#include <sys/param.h>
51#include <sys/stat.h>
52#include <sys/sysctl.h>
53
54#include <err.h>
55#include <errno.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60
61void usage __P((void));
62int main __P((int, char *[]));
63
64int
65main(argc, argv)
66	int argc;
67	char *argv[];
68{
69	struct stat sb;
70	size_t len;
71	int ch, sverrno, mib[2];
72	char *p, *t, *std, path[MAXPATHLEN];
73	int useenvpath = 0;
74
75	while ((ch = getopt(argc, argv, "p")) != -1)
76		switch (ch) {
77		case 'p':
78			useenvpath = 1;	/* use environment for PATH */
79			break;
80
81		case '?':
82		default:
83			usage();
84		}
85	argc -= optind;
86	argv += optind;
87
88	if (argc == 0)
89		usage();
90
91 	if (useenvpath) {
92 		if ((std = getenv("PATH")) == NULL)
93 			err(1, "getenv: PATH" );
94	} else {
95		/* Retrieve the standard path. */
96		mib[0] = CTL_USER;
97		mib[1] = USER_CS_PATH;
98		if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
99			return (-1);
100		if (len == 0)
101			err(1, "user_cs_path: sysctl: zero length");
102		if ((std = malloc(len)) == NULL)
103			err(1, NULL);
104		if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
105			sverrno = errno;
106			free(std);
107			errno = sverrno;
108			err(1, "sysctl: user_cs_path");
109		}
110	}
111
112	/* For each path, for each program... */
113	for (; *argv; ++argv)
114		for (p = std;; *p++ = ':') {
115			t = p;
116			if ((p = strchr(p, ':')) != NULL) {
117				*p = '\0';
118				if (t == p)
119					t = ".";
120			} else
121				if (strlen(t) == 0)
122					t = ".";
123			(void)snprintf(path, sizeof(path), "%s/%s", t, *argv);
124			if (!stat(path, &sb))
125				(void)printf("%s\n", path);
126			if (p == NULL)
127				break;
128		}
129
130	return (0);
131}
132
133void
134usage()
135{
136
137	(void)fprintf(stderr, "usage: whereis [-p] program [...]\n");
138	exit (1);
139}
140