6fdae8a6a4
This patch adds support for the Mageia Linux distribution: http://www.mageia.org/ Mageia is a fork of Mandriva although some divergence has already occured and thus inclusion of these changes upstream allow us to (hopefully) migrate more rapidly to the new standard approaches systemd offers. Indeed, we already use the preferred mechanism of OS identification via the /etc/os-release file rather than a distro specific variation. This patch mostly mirrors the patch added previously for Mandriva support. In addition to those original authors, this patch was mostly written by Dexter Morgan with help from Colin Guthrie and Eugeni Dodonov.
188 lines
4.7 KiB
C
188 lines
4.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include "hostname-setup.h"
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#include "macro.h"
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#include "util.h"
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#include "log.h"
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#if defined(TARGET_FEDORA) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MEEGO) || defined(TARGET_MAGEIA)
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#define FILENAME "/etc/sysconfig/network"
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#elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
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#define FILENAME "/etc/HOSTNAME"
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#elif defined(TARGET_ARCH)
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#define FILENAME "/etc/rc.conf"
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#elif defined(TARGET_GENTOO)
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#define FILENAME "/etc/conf.d/hostname"
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#endif
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static int read_and_strip_hostname(const char *path, char **hn) {
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char *s;
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int r;
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assert(path);
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assert(hn);
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if ((r = read_one_line_file(path, &s)) < 0)
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return r;
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hostname_cleanup(s);
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if (isempty(s)) {
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free(s);
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return -ENOENT;
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}
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*hn = s;
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return 0;
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}
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static int read_distro_hostname(char **hn) {
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#if defined(TARGET_FEDORA) || defined(TARGET_ARCH) || defined(TARGET_GENTOO) || defined(TARGET_ALTLINUX) || defined(TARGET_MANDRIVA) || defined(TARGET_MEEGO) || defined(TARGET_MAGEIA)
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int r;
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FILE *f;
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assert(hn);
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if (!(f = fopen(FILENAME, "re")))
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return -errno;
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for (;;) {
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char line[LINE_MAX];
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char *s, *k;
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if (!fgets(line, sizeof(line), f)) {
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if (feof(f))
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break;
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r = -errno;
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goto finish;
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}
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s = strstrip(line);
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if (!startswith_no_case(s, "HOSTNAME="))
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continue;
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if (!(k = strdup(s+9))) {
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r = -ENOMEM;
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goto finish;
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}
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hostname_cleanup(k);
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if (isempty(k)) {
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free(k);
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r = -ENOENT;
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goto finish;
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}
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*hn = k;
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r = 0;
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goto finish;
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}
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r = -ENOENT;
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finish:
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fclose(f);
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return r;
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#elif defined(TARGET_SUSE) || defined(TARGET_SLACKWARE)
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return read_and_strip_hostname(FILENAME, hn);
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#else
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return -ENOENT;
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#endif
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}
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static int read_hostname(char **hn) {
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int r;
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assert(hn);
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/* First, try to load the generic hostname configuration file,
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* that we support on all distributions */
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if ((r = read_and_strip_hostname("/etc/hostname", hn)) < 0) {
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if (r == -ENOENT)
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return read_distro_hostname(hn);
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return r;
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}
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return 0;
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}
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int hostname_setup(void) {
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int r;
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char *b = NULL;
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const char *hn = NULL;
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if ((r = read_hostname(&b)) < 0) {
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if (r == -ENOENT)
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log_info("No hostname configured.");
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else
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log_warning("Failed to read configured hostname: %s", strerror(-r));
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hn = NULL;
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} else
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hn = b;
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if (!hn) {
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/* Don't override the hostname if it is unset and not
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* explicitly configured */
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char *old_hostname = NULL;
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if ((old_hostname = gethostname_malloc())) {
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bool already_set;
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already_set = old_hostname[0] != 0;
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free(old_hostname);
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if (already_set)
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goto finish;
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}
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hn = "localhost";
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}
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if (sethostname(hn, strlen(hn)) < 0) {
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log_warning("Failed to set hostname to <%s>: %m", hn);
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r = -errno;
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} else
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log_info("Set hostname to <%s>.", hn);
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finish:
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free(b);
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return r;
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}
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