mirror of
https://gitlab.archlinux.org/tpowa/archboot.git
synced 2024-09-19 19:40:37 +02:00
119 lines
2.6 KiB
Bash
Executable file
119 lines
2.6 KiB
Bash
Executable file
#! /bin/sh
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#
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# start_udev
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# script to initialize /dev by using udev.
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#
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# Modified for Archlinux by Tobias Powalowski <tpowa@archlinux.org>
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#
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# Inspired by:
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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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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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udev_root="/dev"
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trigger_device_events ()
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{
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/sbin/udevtrigger
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}
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wait_for_queue ()
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{
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# disabled because it hangs network boot
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#loop=20
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#while ! [ "$loop" -gt 0 -a -d /dev/.udev/queue ]; do
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# sleep 0.1;
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# loop=$(($loop - 1))
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#done
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/sbin/udevsettle
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}
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make_extra_nodes ()
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{
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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 -sf /proc/self/fd $udev_root/fd
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ln -sf /proc/self/fd/0 $udev_root/stdin
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ln -sf /proc/self/fd/1 $udev_root/stdout
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ln -sf /proc/self/fd/2 $udev_root/stderr
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ln -sf /proc/kcore $udev_root/core
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}
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udev_init ()
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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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# mount ramfs, else autodetection will fail!
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mount -t ramfs none $udev_root
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#create missing nodes
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mknod /dev/null c 1 3
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mknod /dev/zero c 1 5
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mknod /dev/console c 5 1
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# propogate /udev from /sys
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#echo "Creating initial udev device nodes:"
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#echo "making extra nodes"
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make_extra_nodes
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# check if udevd is already running
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#echo "start udev daemon"
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/sbin/udevd --daemon
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case "$(uname -r)" in
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2.6.[0-9]|2.6.[0-9][!0-9]*) ;;
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*) if [ -f "/sys/class/tty/console/uevent" ]; then
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#echo "Kernel >= 2.6.15 and supports uevents"
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# trigger the sorted events
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echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
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# catch events that are real fast
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mkdir -p /dev/.udev/queue
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else
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# for older kernels without uevents will be removed when udevstart dies in udev
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echo "Kernel does not support uevents, you need a kernel >= 2.6.15!"
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exit 1
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fi
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;;
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esac
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}
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udev_uevents ()
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{
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# configure all devices
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trigger_device_events
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# until we know how to do better, just wait for _all_ events to finish
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wait_for_queue
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}
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if [ $# -eq 0 ]; then
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udev_init
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udev_uevents
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fi
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[ "$1" = "init" ] && udev_init
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[ "$1" = "uevents" ] && udev_uevents
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exit 0
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