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 }
51