Source code reorganization:
[disorder] / lib / hostname.c
1 /*
2 * This file is part of DisOrder
3 * Copyright (C) 2007 Richard Kettlewell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21 #include "common.h"
22
23 #include <sys/utsname.h>
24 #include <errno.h>
25 #include <netdb.h>
26
27 #include "mem.h"
28 #include "hostname.h"
29 #include "log.h"
30
31 static const char *hostname;
32
33 /** @brief Return the local hostname
34 * @return Hostname
35 */
36 const char *local_hostname(void) {
37 if(!hostname) {
38 struct utsname u;
39 struct hostent *he;
40
41 if(uname(&u) < 0)
42 fatal(errno, "error calling uname");
43 if(!(he = gethostbyname(u.nodename)))
44 fatal(0, "cannot resolve '%s'", u.nodename);
45 hostname = xstrdup(he->h_name);
46 }
47 return hostname;
48 }
49
50
51 /*
52 Local Variables:
53 c-basic-offset:2
54 comment-column:40
55 fill-column:79
56 indent-tabs-mode:nil
57 End:
58 */