CasperSecurity
#!/bin/sh -e
### BEGIN INIT INFO
# Provides: udev
# Required-Start: mountkernfs
# Required-Stop: umountroot
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: Start systemd-udevd, populate /dev and load drivers.
### END INIT INFO
PATH="/sbin:/bin"
NAME="systemd-udevd"
DAEMON="/lib/systemd/systemd-udevd"
DESC="hotplug events dispatcher"
PIDFILE="/run/udev.pid"
CTRLFILE="/run/udev/control"
OMITDIR="/run/sendsigs.omit.d"
# we need to unmount /dev/pts/ and remount it later over the devtmpfs
unmount_devpts() {
if mountpoint -q /dev/pts/; then
umount -n -l /dev/pts/
fi
if mountpoint -q /dev/shm/; then
umount -n -l /dev/shm/
fi
}
# mount a devtmpfs over /dev, if somebody did not already do it
mount_devtmpfs() {
if grep -E -q "^[^[:space:]]+ /dev devtmpfs" /proc/mounts; then
mount -n -o remount,nosuid,size=$tmpfs_size,mode=0755 -t devtmpfs devtmpfs /dev
return
fi
if ! mount -n -o nosuid,size=$tmpfs_size,mode=0755 -t devtmpfs devtmpfs /dev; then
log_failure_msg "udev requires devtmpfs support, not started"
log_end_msg 1
fi
return 0
}
create_dev_makedev() {
if [ -e /sbin/MAKEDEV ]; then
ln -sf /sbin/MAKEDEV /dev/MAKEDEV
else
ln -sf /bin/true /dev/MAKEDEV
fi
}
# shell version of /usr/bin/tty
my_tty() {
[ -x /bin/readlink ] || return 0
[ -e /proc/self/fd/0 ] || return 0
readlink --silent /proc/self/fd/0 || true
}
warn_if_interactive() {
if [ "$RUNLEVEL" = "S" -a "$PREVLEVEL" = "N" ]; then
return
fi
TTY=$(my_tty)
if [ -z "$TTY" -o "$TTY" = "/dev/console" -o "$TTY" = "/dev/null" ]; then
return
fi
printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n"
printf "has been run from an interactive shell.\n"
printf "It will probably not do what you expect, so this script will wait\n"
printf "60 seconds before continuing. Press ^C to stop it.\n"
printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
sleep 60
}
make_static_nodes() {
[ -e /lib/modules/$(uname -r)/modules.devname ] || return 0
[ -x /bin/kmod ] || return 0
/bin/kmod static-nodes --format=tmpfiles --output=/proc/self/fd/1 | \
while read type name mode uid gid age arg; do
[ -e $name ] && continue
case "$type" in
c|b|c!|b!) mknod -m $mode $name $type $(echo $arg | sed 's/:/ /') ;;
d|d!) mkdir $name ;;
*) echo "unparseable line ($type $name $mode $uid $gid $age $arg)" >&2 ;;
esac
if [ -x /sbin/restorecon ]; then
/sbin/restorecon $name
fi
done
}
##############################################################################
[ -x $DAEMON ] || exit 0
# defaults
tmpfs_size="10M"
if [ -e /etc/udev/udev.conf ]; then
. /etc/udev/udev.conf
fi
. /lib/lsb/init-functions
if [ ! -e /proc/filesystems ]; then
log_failure_msg "udev requires a mounted procfs, not started"
log_end_msg 1
fi
if ! grep -q '[[:space:]]devtmpfs$' /proc/filesystems; then
log_failure_msg "udev requires devtmpfs support, not started"
log_end_msg 1
fi
if [ ! -d /sys/class/ ]; then
log_failure_msg "udev requires a mounted sysfs, not started"
log_end_msg 1
fi
if [ ! -w /sys ]; then
log_warning_msg "udev does not support containers, not started"
exit 0
fi
if [ -d /sys/class/mem/null -a ! -L /sys/class/mem/null ] || \
[ -e /sys/block -a ! -e /sys/class/block ]; then
log_warning_msg "CONFIG_SYSFS_DEPRECATED must not be selected"
log_warning_msg "Booting will continue in 30 seconds but many things will be broken"
sleep 30
fi
# When modifying this script, do not forget that between the time that the
# new /dev has been mounted and udevadm trigger has been run there will be
# no /dev/null. This also means that you cannot use the "&" shell command.
case "$1" in
start)
if [ ! -e "/run/udev/" ]; then
warn_if_interactive
fi
if [ -w /sys/kernel/uevent_helper ]; then
echo > /sys/kernel/uevent_helper
fi
if ! mountpoint -q /dev/; then
unmount_devpts
mount_devtmpfs
[ -d /proc/1 ] || mount -n /proc
fi
make_static_nodes
# clean up parts of the database created by the initramfs udev
udevadm info --cleanup-db
# set the SELinux context for devices created in the initramfs
[ -x /sbin/restorecon ] && /sbin/restorecon -R /dev
log_daemon_msg "Starting $DESC" "$NAME"
if start-stop-daemon --start --name $NAME --user root --quiet \
--pidfile $PIDFILE --exec $DAEMON --background --make-pidfile \
--notify-await; then
# prevents udevd to be killed by sendsigs (see #791944)
mkdir -p $OMITDIR
ln -sf $PIDFILE $OMITDIR/$NAME
log_end_msg $?
else
log_warning_msg $?
log_warning_msg "Waiting 15 seconds and trying to continue anyway"
sleep 15
fi
log_action_begin_msg "Synthesizing the initial hotplug events (subsystems)"
if udevadm trigger --type=subsystems --action=add; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
log_action_begin_msg "Synthesizing the initial hotplug events (devices)"
if udevadm trigger --type=devices --action=add; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
create_dev_makedev
# wait for the systemd-udevd childs to finish
log_action_begin_msg "Waiting for /dev to be fully populated"
if udevadm settle; then
log_action_end_msg 0
else
log_action_end_msg 0 'timeout'
fi
;;
stop)
log_daemon_msg "Stopping $DESC" "$NAME"
if start-stop-daemon --stop --name $NAME --user root --quiet \
--pidfile $PIDFILE --remove-pidfile --oknodo --retry 5; then
# prevents cryptsetup/dmsetup hangs (see #791944)
rm -f $CTRLFILE
log_end_msg $?
else
log_end_msg $?
fi
;;
restart)
log_daemon_msg "Stopping $DESC" "$NAME"
if start-stop-daemon --stop --name $NAME --user root --quiet \
--pidfile $PIDFILE --remove-pidfile --oknodo --retry 5; then
# prevents cryptsetup/dmsetup hangs (see #791944)
rm -f $CTRLFILE
log_end_msg $?
else
log_end_msg $? || true
fi
log_daemon_msg "Starting $DESC" "$NAME"
if start-stop-daemon --start --name $NAME --user root --quiet \
--pidfile $PIDFILE --exec $DAEMON --background --make-pidfile \
--notify-await; then
# prevents udevd to be killed by sendsigs (see #791944)
mkdir -p $OMITDIR
ln -sf $PIDFILE $OMITDIR/$NAME
log_end_msg $?
else
log_end_msg $?
fi
;;
reload|force-reload)
udevadm control --reload-rules
;;
status)
status_of_proc $DAEMON $NAME && exit 0 || exit $?
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload|status}" >&2
exit 1
;;
esac
exit 0