2 This file is part of systemd.
4 Copyright 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
5 Copyright 2004-2012 Kay Sievers <kay@vrfy.org>
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/mount.h>
27 #include <sys/signalfd.h>
30 #include "selinux-util.h"
32 #include "udev-util.h"
34 static int fake_filesystems(void) {
35 static const struct fakefs {
40 { "test/sys", "/sys", "failed to mount test /sys" },
41 { "test/dev", "/dev", "failed to mount test /dev" },
42 { "test/run", "/run", "failed to mount test /run" },
43 { "test/run", "/etc/udev/rules.d", "failed to mount empty /etc/udev/rules.d" },
44 { "test/run", "/usr/lib/udev/rules.d", "failed to mount empty /usr/lib/udev/rules.d" },
49 err = unshare(CLONE_NEWNS);
52 fprintf(stderr, "failed to call unshare(): %m\n");
56 if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) < 0) {
58 fprintf(stderr, "failed to mount / as private: %m\n");
62 for (i = 0; i < ELEMENTSOF(fakefss); i++) {
63 err = mount(fakefss[i].src, fakefss[i].target, NULL, MS_BIND, NULL);
66 fprintf(stderr, "%s %m", fakefss[i].error);
74 int main(int argc, char *argv[]) {
75 _cleanup_udev_unref_ struct udev *udev = NULL;
76 _cleanup_udev_event_unref_ struct udev_event *event = NULL;
77 _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
78 _cleanup_udev_rules_unref_ struct udev_rules *rules = NULL;
79 char syspath[UTIL_PATH_SIZE];
82 sigset_t mask, sigmask_orig;
85 err = fake_filesystems();
93 log_debug("version %s", VERSION);
94 mac_selinux_init("/dev");
96 sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
100 log_error("action missing");
105 if (devpath == NULL) {
106 log_error("devpath missing");
110 rules = udev_rules_new(udev, 1);
112 strscpyl(syspath, sizeof(syspath), "/sys", devpath, NULL);
113 dev = udev_device_new_from_syspath(udev, syspath);
115 log_debug("unknown device '%s'", devpath);
119 udev_device_set_action(dev, action);
120 event = udev_event_new(dev);
123 sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
124 event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
125 if (event->fd_signal < 0) {
126 fprintf(stderr, "error creating signalfd\n");
130 /* do what devtmpfs usually provides us */
131 if (udev_device_get_devnode(dev) != NULL) {
134 if (streq(udev_device_get_subsystem(dev), "block"))
139 if (!streq(action, "remove")) {
140 mkdir_parents_label(udev_device_get_devnode(dev), 0755);
141 mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
143 unlink(udev_device_get_devnode(dev));
144 rmdir_parents(udev_device_get_devnode(dev), "/");
148 udev_event_execute_rules(event,
149 3 * USEC_PER_SEC, USEC_PER_SEC,
153 udev_event_execute_run(event,
154 3 * USEC_PER_SEC, USEC_PER_SEC,
157 if (event != NULL && event->fd_signal >= 0)
158 close(event->fd_signal);
159 mac_selinux_finish();
161 return err ? EXIT_FAILURE : EXIT_SUCCESS;