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#!/bin/bash
#
# 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}
if [ -f /dev/.in_sysinit ]; then
exec >/dev/console 2>/dev/console </dev/console
fi
. /etc/init.d/functions
. /etc/sysconfig/udev
prog=udev
bin=/sbin/udev
udevd=/sbin/udevd
MAKEDEV="/sbin/MAKEDEV"
# Check SELinux status
selinuxfs="$(fstab_decode_str `LC_ALL=C awk '/ selinuxfs / { print $2 }' /proc/mounts`)"
SELINUX_STATE=
if [ -n "$selinuxfs" ] && [ "`cat /proc/self/attr/current`" != "kernel" ]; then
if [ -r "$selinuxfs/enforce" ] ; then
SELINUX_STATE=`cat "$selinuxfs/enforce"`
else
# assume enforcing if you can't read it
SELINUX_STATE=1
fi
fi
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
[ -d $udev_root/hugepages ] || mkdir -m 0755 $udev_root/hugepages
[ -a /dev/MAKEDEV ] || ln -s $MAKEDEV /dev/MAKEDEV;
USE_MD5="false"
[ -x /usr/bin/md5sum -a "$UDEV_USE_MAKEDEV_CACHE" == "yes" ] && USE_MD5="true"
for i in 0 1 2 3 4 5 6 7; do
[ -b /dev/loop$i ] || /bin/mknod -m 0640 /dev/loop$i b 7 $i
/bin/chown root:disk /dev/loop$i
done
for i in 0 1 2 3; do
[ -c /dev/lp$i ] || /bin/mknod -m 0660 /dev/lp$i c 6 $i
/bin/chown root:lp /dev/lp$i
done
[ -d /dev/net ] || mkdir -p /dev/net
[ -c /dev/net/tun ] || /bin/mknod -m 0666 /dev/net/tun c 10 200
#/bin/chown root:root /dev/net/tun
[ -c /dev/ppp ] || /bin/mknod -m 0600 /dev/ppp c 108 0
#/bin/chown root:root /dev/ppp
[ -c /dev/fuse ] || /bin/mknod -m 0666 /dev/fuse c 10 229
#/bin/chown root:root /dev/fuse
if [ -x /sbin/restorecon ]; then
/sbin/restorecon -R /dev
fi
if [ -x "$MAKEDEV" ]; then
for i in /etc/udev/makedev.d/*.nodes; do
if [ -f "$i" ]; then
# use a little caching to speedup things
if [ "$USE_MD5" == "true" ]; then
# fix for MAKEDEV shell scripts
[ -d /dev/.udev/makedev.d ] || mkdir -p /dev/.udev/makedev.d
md5=$(/usr/bin/md5sum "$i"|(read a b; echo $a))-se$SELINUX_STATE
if [ -f "/var/lib/udev/makedev.d/${md5}.sh" ];then
md5file="/var/lib/udev/makedev.d/${md5}.sh"
else
md5file="/dev/.udev/makedev.d/${md5}.sh"
fi
if [ ! -f "$md5file" ]; then
( sed -e 's,#.*,,g' "$i" | \
xargs_simple -n 100 $MAKEDEV -x -a -S ) \
> "$md5file"
fi
. "$md5file" >$udev_root/null 2>&1
else
( sed -e 's,#.*,,g' "$i" | \
xargs_simple -n 100 $MAKEDEV -x )
fi
fi
done
fi
for devdir in /etc/udev/devices /lib/udev/devices; do
[ -d "$devdir" ] || continue
pushd $devdir &> "$udev_root/null"
set *
if [ "$1" != "*" ]; then
#echo "Warning: $devdir is deprecated. Please use /etc/udev/makedev.d/."
cp -ar "$@" $udev_root/
pushd "$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
}
findalias () {
local n
for n in "$1"/* ; do
[ -h "$n" ] && continue
[ -d "$n" ] && { findalias "$n" ; continue; }
[ "${n##*/}" == "modalias" ] && echo $(cat $n)
done
}
# 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 $val
return 0
fi
done
return 1
}
wait_for_queue() {
local timeout=${1:-0}
local ret=0
modprobe scsi_wait_scan &>/dev/null && rmmod scsi_wait_scan
if [ $timeout -gt 0 ]; then
/sbin/udevadm settle --timeout=$timeout
else
# by default wait indefinitely
/sbin/udevadm settle
modprobe scsi_wait_scan &>/dev/null && rmmod scsi_wait_scan
while ! /sbin/udevadm settle --timeout=0; do
echo
echo -n "udev still not settled. Waiting."
/sbin/udevadm settle
modprobe scsi_wait_scan &>/dev/null && rmmod scsi_wait_scan
done
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 == \"devtmpfs\" || \$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
# First try to mount a devtmpfs on $udev_root
mount -n -o mode=0755 -t devtmpfs none "$udev_root" 2>/dev/null \
|| 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 + $?]
}
make_extra_nodes
cmdline=$(cat /proc/cmdline)
kill_udevd > "$udev_root/null" 2>&1
[ -d $udev_root/.udev ] || mkdir -p $udev_root/.udev > "$udev_root/null" 2>&1
UDEV_OPTS=""
if [ -f "/sys/class/tty/console/uevent" ]; then
# trigger the sorted events
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
if strstr "$cmdline" udevtrace; then
UDEV_OPTS="$UDEV_OPTS --debug-trace"
fi
if strstr "$cmdline" udevlog; then
echo 'WARNING: udevlog is active!' >&2
echo "$udev_root/.udev/udev.log can grow big very quick and resides in RAM" >&2
echo 'Turn off udev logging as soon as you booted!' >&2
/sbin/udevd -d -s $UDEV_OPTS 0<>$udev_root/.udev/udev.log 1<>$udev_root/.udev/udev.log 2<>$udev_root/.udev/udev.log
else
/sbin/udevd -d $UDEV_OPTS
fi
wait
ret=$[$ret + $?]
udevtimeout=$(getval udevtimeout $cmdline)
if strstr "$cmdline" udevdebug; then
/sbin/udevadm control --log-priority=debug
fi
if strstr "$cmdline" udevinfo; then
/sbin/udevadm control --log-priority=info
fi
if strstr "$cmdline" udevchilds; then
/sbin/udevadm control --max-childs=$(getval udevchilds $cmdline)
fi
if strstr "$cmdline" noiswmd; then
/sbin/udevadm control --env=rd_NO_MDIMSM=1
fi
. /etc/sysconfig/network
if [ "$BIOSDEVNAME" = "yes" ]; then
/sbin/udevadm control --property=UDEV_BIOSDEVNAME=1
fi
if [ "$BIOSDEVNAME" = "no" ]; then
/sbin/udevadm control --property=UDEV_BIOSDEVNAME=0
fi
/sbin/udevadm control --env=STARTUP=1
if strstr "$cmdline" modprobedebug; then
/sbin/udevadm control --env=MODPROBE_OPTIONS="-s -v -q"
echo
findalias /sys | while read modules ; do
if [ -n "$modules" ]; then
echo "Loading modules for $modules in 5 seconds"
sleep 5
/sbin/modprobe -a -v -q $modules
wait_for_queue $udevtimeout
fi
done
echo "Triggering Rest"
fi
/sbin/udevadm trigger --type=subsystems --action=add
/sbin/udevadm trigger --type=devices --action=add
ret=$[$ret + $?]
wait_for_queue $udevtimeout
ret=$[$ret + $?]
wait
/sbin/udevadm control --env=STARTUP=
else
echo -n " kernel too old for this udev version "
/sbin/udevd -d $UDEV_OPTS
ret=10
fi
ret=$[$ret + $?]
[ $ret -eq 0 ] && success $"$STRING" || failure $"$STRING"
echo
exit 0