#! /bin/bash
#
-# random init script to setup /udev
+# udev init script to setup /udev
#
# chkconfig: 2345 20 80
# description: manage user-space device nodes in /udev
. /etc/rc.d/init.d/functions
-udev_dir=/udev
+. /etc/udev/udev.conf
+
+prog=udev
sysfs_dir=/sys
bin=/sbin/udev
+udev_root=/udev
+
+run_udev () {
+ # handle block devices and their partitions
+ for i in ${sysfs_dir}/block/*; do
+ # add each drive
+ export DEVPATH=${i#${sysfs_dir}}
+ $bin block &
+
+ # add each partition, on each device
+ for j in $i/*; do
+ if [ -f $j/dev ]; then
+ export DEVPATH=${j#${sysfs_dir}}
+ $bin block &
+ fi
+ done
+ done
+ # all other device classes
+ for i in ${sysfs_dir}/class/*; do
+ for j in $i/*; do
+ if [ -f $j/dev ]; then
+ export DEVPATH=${j#${sysfs_dir}}
+ CLASS=`echo ${i#${sysfs_dir}} | \
+ cut --delimiter='/' --fields=3-`
+ $bin $CLASS &
+ fi
+ done
+ done
+ return 0
+}
+
+make_extra_nodes () {
+ # there are a few things that sysfs does not export for us.
+ # these things go here (and remember to remove them in
+ # remove_extra_nodes()
+ #
+ # Thanks to Gentoo for the initial list of these.
+ ln -snf /proc/self/fd $udev_root/fd
+ ln -snf /proc/self/fd/0 $udev_root/stdin
+ ln -snf /proc/self/fd/1 $udev_root/stdout
+ ln -snf /proc/self/fd/2 $udev_root/stderr
+ ln -snf /proc/kcore $udev_root/core
+ #ln -snf /proc/asound/oss/sndstat $udev_root/sndstat
+}
+
+remove_extra_nodes () {
+ # get rid of the extra nodes created in make_extra_nodes()
+ rm $udev_root/fd
+ rm $udev_root/stdin
+ rm $udev_root/stdout
+ rm $udev_root/stderr
+ rm $udev_root/core
+ #rm $udev_root/sndstat
+}
case "$1" in
start)
- if [ ! -d $udev_dir ]; then
- mkdir $udev_dir
- fi
- if [ ! -d $sysfs_dir ]; then
+ # don't use udev if sysfs is not mounted.
+ if [ ! -d $sysfs_dir/block ]; then
exit 1
fi
+ if [ ! -d $udev_root ]; then
+ mkdir $udev_root
+ fi
+
+ # remove the database if it is there as we always want to start fresh
+ if [ -f $udev_root/.udev.tdb ]; then
+ rm -f $udev_root/.udev.tdb
+ fi
+
# propogate /udev from /sys - we only need this while we do not
# have initramfs and an early user-space with which to do early
# device bring up
- action "Creating initial udev device nodes: " /bin/true
export ACTION=add
- # add tty devices
- for i in ${sysfs_dir}/class/tty/*; do
- export DEVPATH="/"`echo $i | cut --delimiter='/' --fields=3-`
- $bin tty
- done
- # add block devices and their partitions
- for i in ${sysfs_dir}/block/*; do
- export DEVPATH="/"`echo $i | cut --delimiter='/' --fields=3-`
- $bin block
- for j in $i/*; do
- if [ -f $j/dev ]; then
- export DEVPATH="/"`echo $j | \
- cut --delimiter='/' --fields=3-`
- $bin block
- fi
- done
- done
- # TODO: add other device classes
+ echo -n $"Creating initial udev device nodes:"
+ run_udev
+ make_extra_nodes
+ success /bin/true
+ echo
+ touch /var/lock/subsys/udev
;;
stop)
# be careful
- if [ $udev_dir -a "$udev_dir" != "/" ]; then
- # clear out /udev
- rm -rf ${udev_dir}/*
- fi
+ echo -n $"Removing udev device nodes: "
+ export ACTION=remove
+ run_udev
+ remove_extra_nodes
+ success /bin/true
+ echo
+ rm -f /var/lock/subsys/udev
;;
status)
- if [ -d $udev_dir ]; then
- echo "the udev device node directory exists"
- else
- echo "the udev device node directory does not exist"
+ if [ -f /var/lock/subsys/udev ]; then
+ echo $"$prog has run"
+ exit 0
fi
+ echo $"$prog is stopped"
+ exit 3
+ ;;
+ restart)
+ $0 stop
+ $0 start
;;
- restart|reload)
+ reload)
# nothing to do here
;;
*)
- echo "Usage: $0 {start|stop|status}"
+ echo "Usage: $0 {start|stop|status|restart}"
exit 1
esac