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whereis.c revision 1.8 
      1 /*	$NetBSD: whereis.c,v 1.8 1997/10/20 02:22:55 mrg Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)whereis.c	8.3 (Berkeley) 5/4/95";
     45 #endif
     46 __RCSID("$NetBSD: whereis.c,v 1.8 1997/10/20 02:22:55 mrg Exp $");
     47 #endif /* not lint */
     48 
     49 #include <sys/param.h>
     50 #include <sys/stat.h>
     51 #include <sys/sysctl.h>
     52 
     53 #include <err.h>
     54 #include <errno.h>
     55 #include <stdio.h>
     56 #include <stdlib.h>
     57 #include <string.h>
     58 #include <unistd.h>
     59 
     60 void usage __P((void));
     61 int main __P((int, char *[]));
     62 
     63 int
     64 main(argc, argv)
     65 	int argc;
     66 	char *argv[];
     67 {
     68 	struct stat sb;
     69 	size_t len;
     70 	int ch, sverrno, mib[2];
     71 	char *p, *t, *std, path[MAXPATHLEN];
     72 
     73 	while ((ch = getopt(argc, argv, "")) != -1)
     74 		switch (ch) {
     75 		case '?':
     76 		default:
     77 			usage();
     78 		}
     79 	argc -= optind;
     80 	argv += optind;
     81 
     82 	if (argc == 0)
     83 		usage();
     84 
     85 	/* Retrieve the standard path. */
     86 	mib[0] = CTL_USER;
     87 	mib[1] = USER_CS_PATH;
     88 	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
     89 		return (-1);
     90 	if (len == 0)
     91 		err(1, "user_cs_path: sysctl: zero length\n");
     92 	if ((std = malloc(len)) == NULL)
     93 		err(1, "%s", "");
     94 	if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
     95 		sverrno = errno;
     96 		free(std);
     97 		errno = sverrno;
     98 		err(1, "sysctl: user_cs_path");
     99 	}
    100 
    101 	/* For each path, for each program... */
    102 	for (; *argv; ++argv)
    103 		for (p = std;; *p++ = ':') {
    104 			t = p;
    105 			if ((p = strchr(p, ':')) != NULL) {
    106 				*p = '\0';
    107 				if (t == p)
    108 					t = ".";
    109 			} else
    110 				if (strlen(t) == 0)
    111 					t = ".";
    112 			(void)snprintf(path, sizeof(path), "%s/%s", t, *argv);
    113 			if (!stat(path, &sb))
    114 				(void)printf("%s\n", path);
    115 			if (p == NULL)
    116 				break;
    117 		}
    118 
    119 	return (0);
    120 }
    121 
    122 void
    123 usage()
    124 {
    125 
    126 	(void)fprintf(stderr, "usage: whereis program [...]\n");
    127 	exit (1);
    128 }
    129