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#!/bin/sh
#
# start_udev
#
# script to initialize /dev by using udev.
#
# Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
#
# Released under the GPL v2 only.
#
# This needs to be run at the earliest possible point in the boot
# process.
#
# Based on the udev init.d script
#
# Thanks go out to the Gentoo developers for proving
# that this is possible to do.
#
# Yes, it's very verbose, feel free to turn off all of the echo calls,
# they were there to make me feel better that everything was working
# properly during development...
#
# don't use udev if sysfs is not mounted.
sysfs_dir=/sys
export TZ=/etc/localtime
[ -d $sysfs_dir/class ] || exit 1
[ -r /proc/mounts ] || exit 1
[ -x /sbin/udevd ] || exit 1
[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
udev_root=${udev_root-/dev}
. /etc/init.d/functions
prog=udev
bin=/sbin/udev
udevd=/sbin/udevd
MAKEDEV="/sbin/MAKEDEV"
xargs_simple () {
if [ "$1" = "-n" ]; then
shift
MAXNR="$1"
shift
else
MAXNR=100
fi
NR=$MAXNR
ARGS=""
[ -z "$1" ] && set echo
while read line; do
if [ $NR -gt 0 ]; then
ARGS="$ARGS $line"
NR=$[$NR - 1]
else
"$@" $ARGS
NR=$MAXNR
ARGS="$line"
fi
done
if [ -n "$ARGS" ]; then
"$@" $ARGS
fi
}
make_extra_nodes () {
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
[ -d $udev_root/pts ] || mkdir -m 0755 $udev_root/pts
[ -d $udev_root/shm ] || mkdir -m 0755 $udev_root/shm
[ -a /dev/MAKEDEV ] || ln -s $MAKEDEV /dev/MAKEDEV;
if [ -x $MAKEDEV ]; then
for i in /etc/udev/makedev.d/*.nodes; do
if [ -f "$i" ]; then
cat "$i" | sed -e 's,#.*,,g' | \
xargs_simple -n 100 $MAKEDEV -x
fi
done
fi
for devdir in /etc/udev/devices /lib/udev/devices; do
[ -d "$devdir" ] || continue
pushd $devdir &> "$udev_root/null"
set *
if [ "$1" != "*" ]; then
cp -ar "$@" $udev_root/
pushd "$udev_root" &> "$udev_root/null"
[ -x /sbin/restorecon ] && /sbin/restorecon "$@"
popd &> "$udev_root/null"
fi
popd &> "$udev_root/null"
done
}
kill_udevd() {
if [ -x /sbin/pidof ]; then
pid=`/sbin/pidof -x udevd`
[ -n "$pid" ] && kill $pid
fi
}
wait_for_queue() {
local timeout=${1:-0}
local ret=0
if [ $timeout -gt 0 ]; then
/sbin/udevsettle --timeout=$timeout
else
/sbin/udevsettle
fi
ret=$?
if [ $ret -ne 0 ]; then
echo -n "Wait timeout. Will continue in the background."
fi
return $ret;
}
export ACTION=add
prog=udev
ret=0
STRING=$"Starting $prog: "
# propagate $udev_root from /sys
echo -n "$STRING"
# mount the tmpfs on ${udev_root%/}, if not already done
LANG=C awk "\$2 == \"${udev_root%/}\" && \$3 == \"tmpfs\" { exit 1 }" /proc/mounts && {
if LANG=C fgrep -q "none ${udev_root%/}/pts " /proc/mounts; then
PTSDIR=$(mktemp -d)
mount --move $udev_root/pts "$PTSDIR"
fi
if LANG=C fgrep -q "none ${udev_root%/}/shm " /proc/mounts; then
SHMDIR=$(mktemp -d)
mount --move $udev_root/shm "$SHMDIR"
fi
mount -n -o mode=0755 -t tmpfs none "$udev_root"
mkdir -m 0755 $udev_root/pts
mkdir -m 0755 $udev_root/shm
if [ -n "$PTSDIR" ]; then
mount --move "$PTSDIR" $udev_root/pts
rmdir "$PTSDIR"
fi
if [ -n "$SHMDIR" ]; then
mount --move "$SHMDIR" $udev_root/shm
rmdir "$SHMDIR"
fi
ret=$[$ret + $?]
}
# returns OK if $1 contains $2
strstr() {
[ "${1#*$2*}" = "$1" ] && return 1
return 0
}
getval() {
what=$1
shift
for arg; do
if strstr "$arg" "$what="; then
val=${arg#${what}=*}
echo $val
return 0
fi
done
return 1
}
make_extra_nodes
kill_udevd > "$udev_root/null" 2>&1
rm -fr /dev/.udev > "$udev_root/null" 2>&1
cmdline=$(cat /proc/cmdline)
if [ -f "/sys/class/tty/console/uevent" ]; then
# trigger the sorted events
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
if strstr "$cmdline" modprobedebug; then
touch /dev/.modprobe_debug
else
rm -f /dev/.modprobe_debug
fi
/sbin/udevd -d
ret=$[$ret + $?]
if strstr "$cmdline" udevdebug; then
/sbin/udevcontrol log_priority=debug
fi
/sbin/udevtrigger
ret=$[$ret + $?]
wait_for_queue $(getval udevtimeout $cmdline)
ret=$[$ret + $?]
else
echo -n " kernel too old for this udev version "
/sbin/udevd -d
ret=10
fi
ret=$[$ret + $?]
[ $ret -eq 0 ] && success $"$STRING" || failure $"$STRING"
echo
exit 0
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