external/bsd/bind/dist/bin/tests/system/builtin/gethostname.c

   1 /*      $NetBSD: gethostname.c,v 1.1.1.3 2014/12/10 03:34:28 christos Exp $     */
   2
   3 /*
   4  * Copyright (C) 2014  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <config.h>
  20
  21 #include <unistd.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25 #include <isc/util.h>
  26
  27 #ifndef MAXHOSTNAMELEN
  28 #ifdef HOST_NAME_MAX
  29 #define MAXHOSTNAMELEN HOST_NAME_MAX
  30 #else
  31 #define MAXHOSTNAMELEN 256
  32 #endif
  33 #endif
  34
  35 int
  36 main(int argc, char **argv) {
  37         char hostname[MAXHOSTNAMELEN];
  38         int n;
  39
  40         UNUSED(argc);
  41         UNUSED(argv);
  42
  43         n = gethostname(hostname, sizeof(hostname));
  44         if (n == -1) {
  45                 perror("gethostname");
  46                 exit(1);
  47         }
  48         fprintf(stdout, "%s\n", hostname);
  49         return (0);
  50 }