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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
18 You should have received a copy of the GNU 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)
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 char* strip_bad_chars(char *s) {
46 for (p = s, d = s; *p; p++)
47 if ((*p >= 'a' && *p <= 'z') ||
48 (*p >= 'A' && *p <= 'Z') ||
49 (*p >= '0' && *p <= '9') ||
60 static int read_distro_hostname(char **hn) {
62 #if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO)
68 if (!(f = fopen(FILENAME, "re")))
75 if (!fgets(line, sizeof(line), f)) {
85 if (!startswith_no_case(s, "HOSTNAME="))
88 if (!(k = strdup(s+9))) {
112 #elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
118 if ((r = read_one_line_file(FILENAME, &s)) < 0)
121 k = strdup(strstrip(s));
142 static int read_hostname(char **hn) {
148 /* First, try to load the generic hostname configuration file,
149 * that we support on all distributions */
151 if ((r = read_one_line_file("/etc/hostname", &s)) < 0) {
154 return read_distro_hostname(hn);
159 k = strdup(strstrip(s));
177 int hostname_setup(void) {
181 if ((r = read_hostname(&hn)) < 0) {
183 log_warning("Failed to read configured hostname: %s", strerror(-r));
188 r = sethostname(hn, strlen(hn)) < 0 ? -errno : 0;
191 log_warning("Failed to set hostname to <%s>: %s", hn, strerror(-r));
193 log_info("Set hostname to <%s>.", hn);