98 lines
2.1 KiB
Bash
98 lines
2.1 KiB
Bash
#! /bin/bash
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#
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# start_udev
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#
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# script to initialize /dev by using udev.
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#
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# Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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#
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# Released under the GPL v2 only.
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#
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# This needs to be run at the earliest possible point in the boot
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# process.
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#
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# Based on the udev init.d script
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#
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# Thanks go out to the Gentoo developers for proving
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# that this is possible to do.
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#
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# Yes, it's very verbose, feel free to turn off all of the echo calls,
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# they were there to make me feel better that everything was working
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# properly during development...
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#
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. /etc/udev/udev.conf
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prog=udev
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sysfs_dir=/sys
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bin=/sbin/udev
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udevd=/sbin/udevd
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run_udev () {
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# handle block devices and their partitions
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for i in ${sysfs_dir}/block/*; do
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# add each drive
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export DEVPATH=${i#${sysfs_dir}}
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echo "$DEVPATH"
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$bin block
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# add each partition, on each device
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for j in $i/*; do
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if [ -f $j/dev ]; then
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export DEVPATH=${j#${sysfs_dir}}
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echo "$DEVPATH"
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$bin block
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fi
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done
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done
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# all other device classes
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for i in ${sysfs_dir}/class/*; do
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for j in $i/*; do
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if [ -f $j/dev ]; then
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export DEVPATH=${j#${sysfs_dir}}
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CLASS=`echo ${i#${sysfs_dir}} | \
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cut --delimiter='/' --fields=3-`
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echo "$DEVPATH"
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$bin $CLASS
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fi
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done
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done
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return 0
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}
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make_extra_nodes () {
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# there are a few things that sysfs does not export for us.
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# these things go here (and remember to remove them in
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# remove_extra_nodes()
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#
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# Thanks to Gentoo for the initial list of these.
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ln -snf /proc/self/fd $udev_root/fd
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ln -snf /proc/self/fd/0 $udev_root/stdin
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ln -snf /proc/self/fd/1 $udev_root/stdout
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ln -snf /proc/self/fd/2 $udev_root/stderr
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ln -snf /proc/kcore $udev_root/core
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mkdir $udev_root/pts
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mkdir $udev_root/shm
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}
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# don't use udev if sysfs is not mounted.
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if [ ! -d $sysfs_dir/block ]; then
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exit 1
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fi
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echo "mounting... ramfs at $udev_root"
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mount -n -t ramfs none $udev_root
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# propogate /udev from /sys
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export ACTION=add
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export UDEV_NO_SLEEP=1
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echo "Creating initial udev device nodes:"
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run_udev
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echo "making extra nodes"
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make_extra_nodes
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echo "udev startup is finished!"
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exit 0
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