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"
35 typedef struct MountPoint {
43 static const MountPoint mount_table[] = {
44 { "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV },
45 { "sysfs", "/sys", "sysfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV },
46 { "devtmps", "/dev", "devtmpfs", "mode=755", MS_NOSUID },
47 { "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NOEXEC|MS_NODEV },
48 { "devpts", "/dev/pts", "devpts", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV },
49 { "cgroup", "/cgroup/debug", "cgroup", "debug", MS_NOSUID|MS_NOEXEC|MS_NODEV },
50 { "debugfs", "/sys/kernel/debug", "debugfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV }
53 bool mount_point_is_api(const char *path) {
56 /* Checks if this mount point is considered "API", and hence
57 * should be ignored */
59 for (i = 0; i < ELEMENTSOF(mount_table); i ++)
60 if (path_startswith(path, mount_table[i].where))
66 static int is_mount_point(const char *t) {
70 if (lstat(t, &a) < 0) {
78 if (!(copy = strdup(t)))
81 if (lstat(dirname(copy), &b) < 0) {
88 return a.st_dev != b.st_dev;
91 static int mount_one(const MountPoint *p) {
96 if ((r = is_mount_point(p->where)) < 0)
102 /* The access mode here doesn't really matter too much, since
103 * the mounted file system will take precedence anyway. */
104 mkdir_p(p->where, 0755);
106 log_debug("Mounting %s to %s of type %s with options %s.",
117 log_error("Failed to mount %s: %s", p->where, strerror(errno));
124 int mount_setup(void) {
128 for (i = 0; i < ELEMENTSOF(mount_table); i ++)
129 if ((r = mount_one(mount_table+i)) < 0)