#!/bin/sh -e
### BEGIN INIT INFO
# Provides: udev
# Required-Start:
# Required-Stop:
# Default-Start: S
# Default-Stop:
# Short-Description: Make ignorant dependency builders happy
# Description: Dependencies are not always what the should be like in our setup
### END INIT INFO
# we need to unmount /dev/pts/ and remount it later over the tmpfs
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 tmpfs over /dev, if somebody did not already do it
mount tmpfs() {
if grep -E -q "^[^[:space:]]+ /dev (dev)?tmpfs" /proc/mounts; then
mount -n -o remount,${dev mount options} -t tmpfs tmpfs /dev
return
fi
if ! mount -n -o $dev mount options -t tmpfs tmpfs /dev; then
log failure msg "udev requires tmpfs support, not started"
log end msg 1
fi
return 0
}
create dev makedev() {
if [ -e /sbin/MAKEDEV ]; then
ln -sf /sbin/MAKEDEV /dev/MAKEDEV
else
ln -sf /bin/true /dev/MAKEDEV
fi
}
# If the initramfs does not have /run, the initramfs udev database must
# be migrated from /dev/.udev/ to /run/udev/.
move udev database() {
[ -e "$udev root/.udev/" ] || return 0
[ ! -e /run/udev/ ] || return 0
[ -e /run/ ] || return 0
mountpoint -q /run/ || return 0
mv $udev root/.udev/ /run/udev/ || true
}
supported kernel() {
case "$(uname -r)" in
2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
2.6.[12][0-9]|2.6.[12][0-9][!0-9]*) return 1 ;;
2.6.3[0-1]|2.6.3[0-1][!0-9]*) return 1 ;;
esac
return 0
}
# 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 $*\n\n"
printf "has been run from an interactive shell.\n"
printf "It will probably not do what you expect, so this script will wait\n"
printf "60 seconds before continuing. Press ^C to stop it.\n"
printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
sleep 60
}
##############################################################################
[ -x /sbin/udevd ] || exit 0
PATH="/sbin:/bin"
# defaults
tmpfs size="10M"
udev root="/dev"
if [ -e /etc/udev/udev.conf ]; then
. /etc/udev/udev.conf
fi
. /lib/lsb/init-functions
if ! supported kernel; then
log failure msg "udev requires a kernel >= 2.6.32, not started"
log end msg 1
fi
if [ ! -e /proc/filesystems ]; then
log failure msg "udev requires a mounted procfs, not started"
log end msg 1
fi
if ! grep -q '[[:space:]]tmpfs$' /proc/filesystems; then
log failure msg "udev requires tmpfs 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 [ ! -e /sys/kernel/uevent helper ]; then
log failure msg "udev requires hotplug support, not started"
log end msg 1
fi
if ! ps --no-headers --format args ax | egrep -q '^\['; 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
##############################################################################
# this is experimental and may not work well
if [ "$UDEV DISABLED" = "yes" ]; then
udev root=/etc/udev/.dev
export UDEV ROOT=$udev root
fi
udev root=${udev root%/}
dev mount options='mode=0755'
if [ "$tmpfs size" ]; then
dev mount options="size=${tmpfs size},${dev mount options}"
fi
if [ "$udev root" != "/dev" ]; then
log warning msg "udev root != /dev/"
case "$1" in
start)
if init is upstart 2>/dev/null; then
exit 1
fi
if mountpoint -q $udev root/; then
log failure msg "$udev root is already mounted"
log end msg 1
fi
echo > /sys/kernel/uevent helper
mount -n -o $dev mount options -t tmpfs tmpfs $udev root
log daemon msg "Starting the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log end msg $?
else
log warning msg $?
log warning msg "Waiting 15 seconds and trying to continue anyway"
sleep 15
fi
/lib/udev/write dev root rule
log action begin msg "Synthesizing the initial hotplug events"
if udevadm trigger --action=add; then
log action end msg $?
else
log action end msg $?
fi
;;
stop)
# make sure a manual invocation of the init script doesn't stop an
# upstart-controlled instance of udev
if init is upstart 2>/dev/null && status udev | grep -q start; then
exit 0
fi
log daemon msg "Stopping the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then
log end msg $?
else
log end msg $?
fi
log action begin msg "Unmounting $udev root"
# unmounting with -l should never fail
if umount -n -l $udev root; then
log action end msg $?
else
log action end msg $?
fi
;;
restart)
if init is upstart 2>/dev/null; then
exit 1
fi
log daemon msg "Stopping the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then
log end msg $?
else
log end msg $? || true
fi
log daemon msg "Starting the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log end msg $?
else
log end msg $?
fi
;;
reload|force-reload)
udevadm control --reload-rules
;;
status)
status of proc /sbin/udevd udevd && exit 0 || exit $?
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload|status}" >&2
exit 1
;;
esac
exit 0
fi # udev root != /dev
##############################################################################
# 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 init is upstart 2>/dev/null; then
exit 1
fi
if mountpoint -q $udev root/; then
TMPFS MOUNTED=1
elif [ -e "$udev root/.udev/" ]; then
log warning msg ".udev/ already exists on the static $udev root"
fi
if [ ! -e "$udev root/.udev/" -a ! -e "/run/udev/" ]; then
warn if interactive
fi
echo > /sys/kernel/uevent helper
move udev database
if [ -z "$TMPFS MOUNTED" ]; then
unmount devpts
mount tmpfs
[ -d /proc/1 ] || mount -n /proc
fi
# 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
# /dev/null must be created before udevd is started
/lib/udev/create static nodes || true
log daemon msg "Starting the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log end msg $?
else
log warning msg $?
log warning msg "Waiting 15 seconds and trying to continue anyway"
sleep 15
fi
/lib/udev/write dev root rule
log action begin msg "Synthesizing the initial hotplug events"
if udevadm trigger --action=add; then
log action end msg $?
else
log action end msg $?
fi
create dev makedev
# wait for the 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 the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then
log end msg $?
else
log end msg $?
fi
;;
restart)
if init is upstart 2>/dev/null; then
exit 1
fi
log daemon msg "Stopping the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then
log end msg $?
else
log end msg $? || true
fi
log daemon msg "Starting the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log end msg $?
else
log end msg $?
fi
;;
reload|force-reload)
udevadm control --reload-rules
;;
status)
status of proc /sbin/udevd udevd && exit 0 || exit $?
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload|status}" >&2
exit 1
;;
esac
exit 0