whereis.c revision 99406 
1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)whereis.c	8.3 (Berkeley) 5/4/95";
43#endif /* not lint */
44__RCSID("$NetBSD: whereis.c,v 1.11 2002/06/11 06:06:21 itojun Exp $");
45#endif
46
47#include <sys/cdefs.h>
48__FBSDID("$FreeBSD: head/usr.bin/whereis/whereis.c 99406 2002-07-04 12:29:39Z johan $");
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
74	while ((ch = getopt(argc, argv, "")) != -1)
75		switch (ch) {
76		case '?':
77		default:
78			usage();
79		}
80	argc -= optind;
81	argv += optind;
82
83	if (argc == 0)
84		usage();
85
86	/* Retrieve the standard path. */
87	mib[0] = CTL_USER;
88	mib[1] = USER_CS_PATH;
89	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
90		return (-1);
91	if (len == 0)
92		err(1, "user_cs_path: sysctl: zero length");
93	if ((std = malloc(len)) == NULL)
94		err(1, NULL);
95	if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
96		sverrno = errno;
97		free(std);
98		errno = sverrno;
99		err(1, "sysctl: user_cs_path");
100	}
101
102	/* For each path, for each program... */
103	for (; *argv; ++argv)
104		for (p = std;; *p++ = ':') {
105			t = p;
106			if ((p = strchr(p, ':')) != NULL) {
107				*p = '\0';
108				if (t == p)
109					t = ".";
110			} else
111				if (strlen(t) == 0)
112					t = ".";
113			(void)snprintf(path, sizeof(path), "%s/%s", t, *argv);
114			if (!stat(path, &sb))
115				(void)printf("%s\n", path);
116			if (p == NULL)
117				break;
118		}
119
120	return (0);
121}
122
123void
124usage()
125{
126
127	(void)fprintf(stderr, "usage: whereis program ...\n");
128	exit (1);
129}
130