[PATCH] add start_udev init script.

diff --git a/extras/start_udev b/extras/start_udev
new file mode 100644 (file)
index 0000000..caba527
--- /dev/null
+++ b/extras/start_udev
@@ -0,0 +1,91 @@
+#! /bin/bash
+#
+# start_udev
+#
+# script to initialize /dev by using udev.
+#
+# This needs to be run at the earliest possible point in the boot 
+# process.
+#
+# Based on the udev init.d script
+#
+
+. /etc/udev/udev.conf
+
+prog=udev
+sysfs_dir=/sys
+bin=/sbin/udev
+udevd=/sbin/udevd
+
+run_udev () {
+       # handle block devices and their partitions
+       for i in ${sysfs_dir}/block/*; do
+               # add each drive
+               export DEVPATH=${i#${sysfs_dir}}
+               echo "$DEVPATH"
+               $bin block
+
+               # add each partition, on each device
+               for j in $i/*; do
+                       if [ -f $j/dev ]; then
+                               export DEVPATH=${j#${sysfs_dir}}
+                               echo "$DEVPATH"
+                               $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-`
+                               echo "$DEVPATH"
+                               $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
+
+       mkdir $udev_root/pts
+       mkdir $udev_root/shm
+}
+
+# don't use udev if sysfs is not mounted.
+if [ ! -d $sysfs_dir/block ]; then
+       exit 1
+fi
+
+echo "mounting... ramfs at $udev_root"
+mount -n -t ramfs none $udev_root
+
+# We want to start udevd ourselves if it isn't already running.  This
+# lets udevd run at a sane nice level...
+echo "starting udevd"
+$udevd &
+
+# propogate /udev from /sys
+export ACTION=add
+export UDEV_NO_SLEEP=1
+echo "Creating initial udev device nodes:"
+run_udev
+
+echo "making extra nodes"
+make_extra_nodes
+
+echo "udev startup is finished!"
+exit 0