1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "hostname-setup.h"
33 #if defined(TARGET_FEDORA) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
34 #define FILENAME "/etc/sysconfig/network"
35 #elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
36 #define FILENAME "/etc/HOSTNAME"
37 #elif defined(TARGET_ARCH)
38 #define FILENAME "/etc/rc.conf"
39 #elif defined(TARGET_GENTOO)
40 #define FILENAME "/etc/conf.d/hostname"
43 static int read_and_strip_hostname(const char *path, char **hn) {
50 r = read_one_line_file(path, &s);
66 static int read_distro_hostname(char **hn) {
68 #if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
70 _cleanup_fclose_ FILE *f = NULL;
74 f = fopen(FILENAME, "re");
82 if (!fgets(line, sizeof(line), f)) {
92 if (!startswith_no_case(s, "HOSTNAME="))
119 #elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
120 return read_and_strip_hostname(FILENAME, hn);
126 static int read_hostname(char **hn) {
131 /* First, try to load the generic hostname configuration file,
132 * that we support on all distributions */
134 r = read_and_strip_hostname("/etc/hostname", hn);
137 return read_distro_hostname(hn);
145 int hostname_setup(void) {
148 const char *hn = NULL;
151 r = read_hostname(&b);
158 log_warning("Failed to read configured hostname: %s", strerror(-r));
163 /* Don't override the hostname if it is already set
164 * and not explicitly configured */
165 if (hostname_is_set())
169 log_info("No hostname configured.");
174 if (sethostname(hn, strlen(hn)) < 0) {
175 log_warning("Failed to set hostname to <%s>: %m", hn);
178 log_info("Set hostname to <%s>.", hn);