1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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/>.
22 #include <sys/mount.h>
30 #include "mount-setup.h"
43 static const char *table[] = {
44 "proc", "/proc", "proc", NULL,
45 "sysfs", "/sys", "sysfs", NULL,
46 "devtmps", "/dev", "devtmpfs", "mode=755",
47 "tmpfs", "/dev/shm", "tmpfs", "mode=1777",
48 "devpts", "/dev/pts", "devpts", NULL,
49 "cgroup", "/cgroup/debug", "cgroup", "debug",
50 "debugfs", "/sys/kernel/debug", "debugfs", NULL,
54 static int is_mount_point(const char *t) {
58 if (lstat(t, &a) < 0) {
66 if (!(copy = strdup(t)))
69 if (lstat(dirname(copy), &b) < 0) {
76 return a.st_dev != b.st_dev;
80 static int mount_one(const char *t[]) {
85 if ((r = is_mount_point(t[MOUNT_WHERE])) < 0)
91 /* The access mode here doesn't really matter too much, since
92 * the mounted file system will take precedence anyway. */
93 mkdir(t[MOUNT_WHERE], 0755);
95 log_debug("Mounting %s to %s of type %s with options %s.",
99 strna(t[MOUNT_OPTIONS]));
101 if (mount(t[MOUNT_WHAT],
105 t[MOUNT_OPTIONS]) < 0) {
106 log_error("Failed to mount %s: %s", t[MOUNT_WHERE], strerror(errno));
113 int mount_setup(void) {
117 for (t = table; *t; t += MOUNT_SKIP)
118 if ((r = mount_one(t)) < 0)