diff options
Diffstat (limited to 'debian/udev.init')
| -rw-r--r-- | debian/udev.init | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/debian/udev.init b/debian/udev.init new file mode 100644 index 0000000..bb54f61 --- /dev/null +++ b/debian/udev.init @@ -0,0 +1,255 @@ +#!/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 |