BSD 4_4_Lite2 release

[unix-history] / usr / src / usr.bin / whereis / whereis.c

/*-
* Copyright (c) 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1993\n\
       The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)whereis.c   8.3 (Berkeley) 5/4/95";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/sysctl.h>

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

void usage __P((void));

int
main(argc, argv)
       int argc;
       char *argv[];
{
       struct stat sb;
       size_t len;
       int ch, sverrno, mib[2];
       char *p, *t, *std, path[MAXPATHLEN];

       while ((ch = getopt(argc, argv, "")) != EOF)
               switch (ch) {
               case '?':
               default:
                       usage();
               }
       argc -= optind;
       argv += optind;

       if (argc == 0)
               usage();

       /* Retrieve the standard path. */
       mib[0] = CTL_USER;
       mib[1] = USER_CS_PATH;
       if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
               return (-1);
       if (len == 0)
               err(1, "user_cs_path: sysctl: zero length\n");
       if ((std = malloc(len)) == NULL)
               err(1, NULL);
       if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
               sverrno = errno;
               free(std);
               errno = sverrno;
               err(1, "sysctl: user_cs_path");
       }

       /* For each path, for each program... */
       for (; *argv; ++argv)
               for (p = std;; *p++ = ':') {
                       t = p;
                       if ((p = strchr(p, ':')) != NULL) {
                               *p = '\0';
                               if (t == p)
                                       t = ".";
                       } else
                               if (strlen(t) == 0)
                                       t = ".";
                       (void)snprintf(path, sizeof(path), "%s/%s", t, *argv);
                       if (!stat(path, &sb))
                               (void)printf("%s\n", path);
                       if (p == NULL)
                               break;
               }
}

void
usage()
{

       (void)fprintf(stderr, "usage: whereis program [...]\n");
       exit (1);
}