whereis/whereis.c

   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 }