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| -rw-r--r-- | extras/start_udev | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/extras/start_udev b/extras/start_udev new file mode 100644 index 0000000000..caba5270c2 --- /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 |