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|
#!/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
# This script is based on Debian's.
COLDPLUG=no
COLDPLUG_TARBALL="/lib/udev/devices.tar.gz"
for x in $(cat /proc/cmdline); do
case $x in
coldplug)
COLDPLUG=yes
;;
esac
done
# we need to unmount /dev/pts/ and remount it later over the tmpfs
unmount_devpts() {
if mountpoint -q /dev/pts/; then
umount -n -l /dev/pts/
fi
if mountpoint -q /dev/shm/; then
umount -n -l /dev/shm/
fi
}
# mount a tmpfs over /dev, if somebody did not already do it
mount_tmpfs() {
if grep -q "/dev tmpfs" /proc/mounts; then
return
fi
if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs udev /dev; then
echo "udev requires tmpfs support, not started."
exit 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
}
make_extra_nodes() {
ret=1
if [ "$(echo /lib/udev/devices/*)" != "/lib/udev/devices/*" ]; then
cp -a /lib/udev/devices/* /$1/
ret=0
fi
[ -e /etc/udev/links.conf ] || return $ret
grep '^[^#]' /etc/udev/links.conf | \
while read type name arg1; do
[ "$type" -a "$name" -a ! -e "/$1/$name" -a ! -L "/$1/$name" ] || continue
case "$type" in
L) ln -s $arg1 /$1/$name ;;
D) mkdir -p /$1/$name ;;
M) mknod -m 600 /$1/$name $arg1 ;;
*) echo "links.conf: unparseable line ($type $name $arg1)" >&2 ;;
esac
done
return $ret
}
##############################################################################
[ -x /sbin/udevd ] || exit 0
PATH="/sbin:/bin"
# defaults
tmpfs_size="2M"
udev_root="/dev"
if [ -e /etc/udev/udev.conf ]; then
. /etc/udev/udev.conf
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 "$1" in
start)
if [ -e "$udev_root/.udev/" ]; then
if mountpoint -q $udev_root/; then
TMPFS_MOUNTED=1
else
echo ".udev/ already exists on the static $udev_root!"
fi
fi
echo > /sys/kernel/uevent_helper
if [ -z "$TMPFS_MOUNTED" ]; then
unmount_devpts
mount_tmpfs
else
# and clean up the database of the initramfs udev
rm -rf /dev/.udev/
fi
# /dev/null must be created before udevd is started
if ! make_extra_nodes "$udev_root"; then
COLDPLUG=yes
fi
if [ ! -f "$COLDPLUG_TARBALL" ]; then
COLDPLUG=yes
fi
# if this directory is not present /dev will not be updated by udev
mkdir -p /dev/.udev/db/
echo "Startting the hotplug events dispatcher"
udevd --daemon
mkdir -p /dev/.udev/queue/ /dev/.udev/rules.d/
create_dev_makedev
if [ $COLDPLUG != "no" ]; then
echo "Synthesizing the initial hotplug events"
udevadm trigger
# wait for the udevd childs to finish
echo "Waiting for /dev to be fully populated"
if udevadm settle; then
echo 'done'
else
echo 'timeout'
fi
fi
;;
stop)
echo "Stopping the hotplug events dispatcher"
start-stop-daemon --stop --name udevd --quiet --oknodo
;;
restart)
echo "Stopping the hotplug events dispatcher"
start-stop-daemon --stop --name udevd --quiet --oknodo
echo "Startting the hotplug events dispatcher"
udevd --daemon
;;
reload|force-reload)
udevadm control --reload_rules
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload}"
exit 1
;;
esac
exit 0
|
