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K01udev
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#!/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