2.11BSD#431 - /usr/src/usr.bin/whereis/whereis.c

   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: #if !defined(lint) && defined(DOSCCS)
  35: static char copyright[] =
  36: "@(#) Copyright (c) 1993\n\
  37: 	The Regents of the University of California.  All rights reserved.\n";
  38: 
  39: static char sccsid[] = "@(#)whereis.c	8.1.1 (2.11BSD) 1996";
  40: #endif
  41: 
  42: #include <sys/param.h>
  43: #include <sys/stat.h>
  44: #include <sys/sysctl.h>
  45: 
  46: #include <errno.h>
  47: #include <stdio.h>
  48: #include <stdlib.h>
  49: #include <string.h>
  50: 
  51: void usage();
  52: 
  53: int
  54: main(argc, argv)
  55:     int argc;
  56:     char *argv[];
  57: {
  58:     struct stat sb;
  59:     size_t len;
  60:     int ch, sverrno, mib[2];
  61:     char *p, *t, *std, path[MAXPATHLEN];
  62: 
  63:     while ((ch = getopt(argc, argv, "")) != EOF)
  64:         switch (ch) {
  65:         case '?':
  66:         default:
  67:             usage();
  68:         }
  69:     argc -= optind;
  70:     argv += optind;
  71: 
  72:     /* Retrieve the standard path. */
  73:     mib[0] = CTL_USER;
  74:     mib[1] = USER_CS_PATH;
  75:     if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
  76:         return (-1);
  77:     if (len == 0) {
  78:         err(1, "user_cs_path: sysctl: zero length\n");
  79:         /* NOTREACHED */
  80:     }
  81:     if ((std = (char *)malloc(len)) == NULL) {
  82:         err(1, NULL);
  83:         /* NOTREACHED */
  84:     }
  85:     if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
  86:         sverrno = errno;
  87:         free(std);
  88:         errno = sverrno;
  89:         err(1, "sysctl: user_cs_path");
  90:         /* NOTREACHED */
  91:     }
  92: 
  93:     /* For each path, for each program... */
  94:     for (; *argv; ++argv)
  95:         for (p = std;; *p++ = ':') {
  96:             t = p;
  97:             if ((p = strchr(p, ':')) != NULL) {
  98:                 *p = '\0';
  99:                 if (t == p)
 100:                     t = ".";
 101:             } else
 102:                 if (strlen(t) == 0)
 103:                     t = ".";
 104:             (void)sprintf(path, "%s/%s", t, *argv);
 105:             if (!stat(path, &sb))
 106:                 (void)printf("%s\n", path);
 107:             if (p == NULL)
 108:                 break;
 109:         }
 110: }
 111: 
 112: void
 113: usage()
 114: {
 115:     (void)fprintf(stderr, "whereis: program ...\n");
 116:     exit (1);
 117: }

Defined functions

Defined variables