#!/bin/sh -e
### BEGIN INIT INFO
# Provides: udev
# Required-Start: mountkernfs
# Required-Stop:
# Default-Start: S
# Default-Stop:
# Short-Description: Start udevd, populate /dev and load drivers.
### 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 tmpfs" /proc/mounts; then
return
fi
# /dev/.static/dev/ is used by MAKEDEV to access the real /dev/ directory.
# /lib/udev/devices/ is recycled as a temporary mount point.
if [ -z "$no_static_dev" ]; then
mount -n --bind /dev /lib/udev/devices
fi
if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs /dev; then
if [ -z "$no_static_dev" ]; then
umount -n /lib/udev/devices
fi
log_failure_msg "udev requires tmpfs support, not started."
log_end_msg 1
fi
# relabel the new tmpfs accordingly
[ -x /sbin/restorecon ] && /sbin/restorecon /dev
if [ -z "$no_static_dev" ]; then
mkdir -p /dev/.static/dev
chmod 700 /dev/.static/
mount -n --move /lib/udev/devices /dev/.static/dev
fi
}
create_dev_makedev() {
if [ -e /sbin/MAKEDEV ]; then
ln -sf /sbin/MAKEDEV /dev/MAKEDEV
else
ln -sf /bin/true /dev/MAKEDEV
fi
}
# I hate this hack. -- Md
make_extra_nodes() {
if [ "$(echo /lib/udev/devices/*)" != "/lib/udev/devices/*" ]; then
cp --archive --update /lib/udev/devices/* /dev/
fi
[ -e /etc/udev/links.conf ] || return 0
grep '^[^#]' /etc/udev/links.conf | \
while read type name arg1; do
[ "$type" -a "$name" -a ! -e "/dev/$name" -a ! -L "/dev/$name" ] ||continue
case "$type" in
L) ln -s $arg1 /dev/$name ;;
D) mkdir -p /dev/$name ;;
M) mknod -m 600 /dev/$name $arg1 ;;
*) log_warning_msg "links.conf: unparseable line ($type $name $arg1)" ;;
esac
if [ -x /sbin/restorecon ]; then
/sbin/restorecon /dev/$name >/dev/null 2>/dev/null
fi
done
}
supported_kernel() {
case "$(uname -r)" in
2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
2.6.1[0-4]|2.6.1[0-4][!0-9]*) return 1 ;;
esac
return 0
}
load_input_modules() {
case "$(uname -r)" in
2.6.1[0-5]|2.6.1[0-5][!0-9]*) ;; # <= 2.6.15
*) return 0
esac
for module in mousedev evdev joydev; do
modprobe -q $module || true
done
}
# shell version of /usr/bin/tty
my_tty() {
[ -x /bin/readlink ] || return 0
[ -e /proc/self/fd/0 ] || return 0
readlink --silent /proc/self/fd/0 || true
}
warn_if_interactive() {
if [ "$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 $*\n\n"
printf "has been run from an interactive shell.\n"
printf "It will probably not do what you expect, so this script will wait\n"
printf "60 seconds before continuing. Press ^C to stop it.\n"
printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
sleep 60
}
##############################################################################
[ -x /sbin/udevd ] || exit 0
PATH="/sbin:/bin"
# defaults
tmpfs_size="10M"
udev_root="/dev"
if [ -e /etc/udev/udev.conf ]; then
. /etc/udev/udev.conf
fi
. /lib/lsb/init-functions
if ! supported_kernel; then
log_failure_msg "udev requires a kernel >= 2.6.15, not started."
log_end_msg 1
fi
if [ ! -e /proc/filesystems ]; then
log_failure_msg "udev requires a mounted procfs, not started."
log_end_msg 1
fi
if ! grep -q '[[:space:]]tmpfs$' /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 /proc/sys/kernel/hotplug ]; then
log_failure_msg "udev requires hotplug support, not started."
log_end_msg 1
fi
##############################################################################
# this is experimental and may not work well
if [ "$UDEV_DISABLED" = "yes" ]; then
udev_root=/etc/udev/.dev
UDEV_ROOT=$udev_root
fi
udev_root=${udev_root%/}
if [ "$udev_root" != "/dev" ]; then
log_warning_msg "udev_root != /dev/"
case "$1" in
start)
if [ -e "$udev_root/.udev/" ]; then
if mountpoint -q $udev_root/; then
log_failure_msg "udev is already active on $udev_root."
log_end_msg 1
else
log_warning_msg ".udev/ already exists on the static $udev_root!"
fi
fi
echo > /proc/sys/kernel/hotplug
mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs $udev_root
mkdir -p $udev_root/.udev/db/
log_daemon_msg "Starting2 the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log_end_msg $?
else
log_end_msg $?
fi
log_action_begin_msg "Synthesizing initial hotplug events"
if udevtrigger; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
load_input_modules
;;
stop)
log_daemon_msg "Stopping the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --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)
$0 stop
$0 start
;;
reload|force-reload)
udevcontrol reload_rules
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload}"
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 udevtrigger has been run there will be
# no /dev/null. This also means that you cannot use the "&" shell command.
case "$1" in
start)
if [ -e "$udev_root/.udev/" ]; then
if mountpoint -q $udev_root/; then
TMPFS_MOUNTED=1
else
log_warning_msg ".udev/ already exists on the static $udev_root!"
fi
else
warn_if_interactive
fi
echo > /proc/sys/kernel/hotplug
if [ -z "$TMPFS_MOUNTED" ]; then
unmount_devpts
mount_tmpfs
[ -d /proc/1 ] || mount -n /proc
else
# set the SELinux context for devices created in the initramfs
[ -x /sbin/restorecon ] && /sbin/restorecon -R /dev
fi
# /dev/null must be created before udevd is started
make_extra_nodes
# if this directory is not present /dev will not be updated by udev
mkdir -p /dev/.udev/db/
log_daemon_msg "Starting3 the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log_end_msg $?
else
log_end_msg $?
fi
mkdir -p /dev/.udev/queue/
log_action_begin_msg "Synthesizing the initial hotplug events"
if udevtrigger; then
log_action_end_msg $?
else
log_action_end_msg $?
fi
load_input_modules
create_dev_makedev
# wait for the udevd childs to finish
log_action_begin_msg "Waiting for /dev to be fully populated"
if udevsettle; 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 --quiet --oknodo --retry 5; then
log_end_msg $?
else
log_end_msg $?
fi
;;
restart)
log_daemon_msg "Stopping the hotplug events dispatcher" "udevd"
if start-stop-daemon --stop --name udevd --quiet --oknodo --retry 5; then
log_end_msg $?
else
log_end_msg $? || true
fi
log_daemon_msg "Starting4 the hotplug events dispatcher" "udevd"
if udevd --daemon; then
log_end_msg $?
else
log_end_msg $?
fi
;;
reload|force-reload)
udevcontrol reload_rules
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload}"
exit 1
;;
esac
exit 0