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7a947ce515
Here is the first patch to cleanup the internal processing of the various stages of an udev event. It should not change any behavior, but if your system depends on udev, please always test it before reboot :) We pass only one generic structure around between add, remove, namedev, db and dev_d handling and make all relevant data available to all internal stages. All udev structures are renamed to "udev". We replace the fake parameter by a flag in the udev structure. We open the class device in the main binaries and not in udev_add, to make it possible to use libsysfs for udevstart directory crawling. The last sleep parameters are removed.
103 lines
2.2 KiB
Bash
103 lines
2.2 KiB
Bash
#! /bin/sh
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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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export ACTION=add
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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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echo "Creating initial udev device nodes:"
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# You can use the shell scripts above by calling run_udev or execute udevstart
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# which does the same thing, but much faster by not using shell.
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# only comment out one of the following lines.
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#run_udev
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/sbin/udevstart
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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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