chiark / gitweb /
Memory management for hands-off reader
[disorder] / lib / hostname.c
CommitLineData
bb6ae3fb 1/*
2 * This file is part of DisOrder
3 * Copyright (C) 2007 Richard Kettlewell
4 *
e7eb3a27 5 * This program is free software: you can redistribute it and/or modify
bb6ae3fb 6 * it under the terms of the GNU General Public License as published by
e7eb3a27 7 * the Free Software Foundation, either version 3 of the License, or
bb6ae3fb 8 * (at your option) any later version.
e7eb3a27
RK
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
bb6ae3fb 15 * You should have received a copy of the GNU General Public License
e7eb3a27 16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
bb6ae3fb 17 */
132a5a4a
RK
18/** @file lib/hostname.c
19 * @brief Get the local hostname
20 */
bb6ae3fb 21
05b75f8d 22#include "common.h"
bb6ae3fb 23
24#include <sys/utsname.h>
25#include <errno.h>
26#include <netdb.h>
27
28#include "mem.h"
29#include "hostname.h"
30#include "log.h"
31
32static const char *hostname;
33
34/** @brief Return the local hostname
35 * @return Hostname
36 */
37const char *local_hostname(void) {
38 if(!hostname) {
39 struct utsname u;
40 struct hostent *he;
41
42 if(uname(&u) < 0)
2e9ba080 43 disorder_fatal(errno, "error calling uname");
bb6ae3fb 44 if(!(he = gethostbyname(u.nodename)))
2e9ba080 45 disorder_fatal(0, "cannot resolve '%s'", u.nodename);
bb6ae3fb 46 hostname = xstrdup(he->h_name);
47 }
48 return hostname;
49}
50
51
52/*
53Local Variables:
54c-basic-offset:2
55comment-column:40
56fill-column:79
57indent-tabs-mode:nil
58End:
59*/