#
# Released under the GPL v2 only.
#
-# This needs to be run at the earliest possible point in the boot
+# 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
+# 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,
# properly during development...
# default value, if no config present.
-udev_root="/dev/"
+udev_root="/dev"
sysfs_dir="/sys"
udevd_timeout=8
prog=udev
bin=/sbin/udev
-udevd=/sbin/udevd
+udevd=/lib/udev/udevd
+# trim traling slash, code expects it not to be there
+udev_root=${udev_root%/}
make_extra_nodes () {
grep '^[^#]' /etc/udev/links.conf | \
while read type name arg1; do
- [ "$type" -a "$name" -a ! -e "$udev_root/$name" -a ! -L "/dev/$name" ] ||continue
- case "$type" in
- L) ln -s $arg1 $udev_root/$name ;;
- D) mkdir -p $udev_root/$name ;;
- M) mknod -m 600 /dev/$name $arg1 ;;
- *) echo "links.conf: unparseable line ($type $name $arg1)" ;;
- esac
+ [ "$type" -a "$name" -a ! -e "$udev_root/$name" -a ! -L "/dev/$name" ] ||continue
+ case "$type" in
+ L) ln -s $arg1 $udev_root/$name ;;
+ D) mkdir -p $udev_root/$name ;;
+ M) mknod -m 600 /dev/$name $arg1 ;;
+ *) echo "links.conf: unparseable line ($type $name $arg1)" ;;
+ esac
done
- cp -a /lib/udev/devices/* /dev/ >/dev/null 2>&1 || :
+ [ -d /lib/udev/devices ] && cp -a /lib/udev/devices/* /dev/ >/dev/null 2>&1 || :
+ [ -d /lib64/udev/devices ] && cp -a /lib64/udev/devices/* /dev/ >/dev/null 2>&1 || :
}
kill_udevd() {
if [ -x /sbin/pidof ]; then
- pid=`/sbin/pidof -x udevd`
+ pid=$(/sbin/pidof -x udevd)
[ -n "$pid" ] && kill $pid
fi
}
set_hotplug_handler() {
- echo "" > /proc/sys/kernel/hotplug
+ echo "" > /proc/sys/kernel/hotplug
+}
+
+# find subdirs mounted under $udev_root
+get_dev_mounts() {
+ awk -vudev_root="$udev_root/" '
+ BEGIN {
+ len = length(udev_root);
+ }
+
+ substr($2, 1, len) == udev_root {
+ print substr($2, len + 1)
+ }' /proc/mounts
}
export ACTION=add
show "Starting udev"
busy
-# 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 ${TMPDIR:-/tmp}/tmpXXXXXX)
- mount --move $udev_root/pts "$PTSDIR"
- fi
- if LANG=C fgrep -q "none ${udev_root%/}/shm " /proc/mounts; then
- SHMDIR=$(mktemp -d ${TMPDIR:-/tmp}/tmpXXXXXX)
- 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
+# mount the devtmpfs on $udev_root, if not already done
+awk "\$2 == \"$udev_root\" && \$3 == \"devtmpfs\" { exit 1 }" /proc/mounts && {
+ submounts=$(get_dev_mounts)
+ if [ "$submounts" ]; then
+ # mount to temporary location to be able to move submounts
+ # this needs writable TMPDIR:-/tmp, so it won't work in early boot
+ # but fix is simple: use initramfs instead of romfs
+ devdir=$(mktemp -d ${TMPDIR:-/tmp}/tmpXXXXXX)
+ else
+ devdir=$udev_root
+ fi
+ mount -n -o mode=0755 -t devtmpfs devtmpfs "$devdir"
ret=$(( $ret + $? ))
+
+ # relocate submounts
+ for dir in $submounts; do
+ mount -n --move $udev_root/$dir $devdir/$dir
+ ret=$(( $ret + $? ))
+ done
+
+ if [ "$submounts" ]; then
+ mount -n --move $devdir $udev_root
+ rmdir $devdir
+ fi
}
kill_udevd > "$udev_root/null" 2>&1
-if [ -f "/sys/class/tty/console/uevent" ]; then
+# Start udevd daemon
+$udevd --daemon
+ret=$(( $ret + $? ))
- # Start udevd daemon
- udevd --daemon
- ret=$(( $ret + $? ))
-
+# Making extra nodes
+make_extra_nodes
+ret=$(( $ret + $? ))
+
+if [ -f "/sys/class/tty/console/uevent" ]; then
# Setting default hotplug handler
set_hotplug_handler
ret=$(( $ret + $? ))
-
- # Making extra nodes
- make_extra_nodes
- ret=$(( $ret + $? ))
-
+
# retrigger all events
- mkdir -p /dev/.udev/queue
- list=$(echo /sys/bus/*/devices/*/uevent)
- list="$list $(echo /sys/class/*/*/uevent)"
- list="$list $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
- for i in $list; do
- case "$i" in
- */device/uevent|*\**)
- continue
- ;;
- */class/mem/*|*/class/tty/*)
- first="$first $i"
- ;;
- */block/md*)
- last="$last $i"
- ;;
- */*)
- default="$default $i"
- ;;
- esac
- done
-
+ # Udev finds it's own way of making this dir
+ # and making it by hand makes udevsettle
+ # work forever
+ #mkdir -p /dev/.udev/queue
+ udevadm trigger
ret=$(( $ret + $? ))
-
- # trigger the sorted events
- for i in $first $default $last; do
- echo "add" > "$i"
- done
- ret=$(( $ret + $? ))
-
# wait for the events to finish
- loop=300
- while test -d /dev/.udev/queue; do
- sleep 0.1;
- test "$loop" -gt 0 || break
- loop=$(($loop - 1))
- done
-
+ udevadm settle
ret=$(( $ret + $? ))
else
- echo "udev requires a kernel >= 2.6.15, not started."
- exit 0
+ echo "Kernel too old for this udev version"
fi
ret=$(( $ret + $? ))
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