Windsome Zeng
106 lines
3.1 KiB
Bash
106 lines
3.1 KiB
Bash
#!/bin/sh
|
|
#
|
|
# udev This is a minimal non-LSB version of a UDEV startup script. It
|
|
# was derived by stripping down the udev-058 LSB version for use
|
|
# with buildroot on embedded hardware using Linux 2.6.34+ kernels.
|
|
#
|
|
# You may need to customize this for your system's resource limits
|
|
# (including startup time!) and administration. For example, if
|
|
# your early userspace has a custom initramfs or initrd you might
|
|
# need /dev much earlier; or without hotpluggable busses (like USB,
|
|
# PCMCIA, MMC/SD, and so on) your /dev might be static after boot.
|
|
#
|
|
# This script assumes your system boots right into the eventual root
|
|
# filesystem, and that init runs this udev script before any programs
|
|
# needing more device nodes than the bare-bones set -- /dev/console,
|
|
# /dev/zero, /dev/null -- that's needed to boot and run this script.
|
|
#
|
|
|
|
# Check for config file and read it
|
|
UDEV_CONFIG=/etc/udev/udev.conf
|
|
test -r $UDEV_CONFIG || exit 6
|
|
. $UDEV_CONFIG
|
|
|
|
# we need to unmount /dev/pts/ and remount it later over the devtmpfs
|
|
unmount_devpts() {
|
|
if mountpoint -q /dev/pts/; then
|
|
umount -n -l /dev/pts/
|
|
fi
|
|
|
|
if mountpoint -q /dev/shm/; then
|
|
umount -n -l /dev/shm/
|
|
fi
|
|
}
|
|
|
|
# mount a devtmpfs over /dev, if somebody did not already do it
|
|
mount_devtmpfs() {
|
|
if grep -E -q "^[^[:space:]]+ /dev devtmpfs" /proc/mounts; then
|
|
mount -n -o remount,nosuid,mode=0755 -t devtmpfs devtmpfs /dev
|
|
return
|
|
fi
|
|
|
|
if ! mount -n -o nosuid,mode=0755 -t devtmpfs devtmpfs /dev; then
|
|
echo "udev requires devtmpfs support, not started"
|
|
fi
|
|
|
|
return 0
|
|
}
|
|
|
|
create_dev_makedev() {
|
|
if [ -e /sbin/MAKEDEV ]; then
|
|
ln -sf /sbin/MAKEDEV /dev/MAKEDEV
|
|
else
|
|
ln -sf /bin/true /dev/MAKEDEV
|
|
fi
|
|
}
|
|
|
|
make_static_nodes() {
|
|
[ -e /lib/modules/$(uname -r)/modules.devname ] || return 0
|
|
[ -x /usr/bin/kmod ] || return 0
|
|
|
|
/usr/bin/kmod static-nodes --format=tmpfiles --output=/proc/self/fd/1 | \
|
|
while read type name mode uid gid age arg; do
|
|
[ -e $name ] && continue
|
|
case "$type" in
|
|
c|b|c!|b!) mknod -m $mode $name $type $(echo $arg | sed 's/:/ /') ;;
|
|
d|d!) mkdir $name ;;
|
|
*) echo "unparseable line ($type $name $mode $uid $gid $age $arg)" >&2 ;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
case "$1" in
|
|
start)
|
|
if ! mountpoint -q /dev/; then
|
|
unmount_devpts
|
|
mount_devtmpfs
|
|
fi
|
|
|
|
make_static_nodes
|
|
|
|
# clean up parts of the database created by the initramfs udev
|
|
udevadm info --cleanup-db
|
|
|
|
printf "Populating %s using udev: " "${udev_root:-/dev}"
|
|
[ -e /proc/sys/kernel/hotplug ] && printf '\000\000\000\000' > /proc/sys/kernel/hotplug
|
|
/sbin/udevd -d || { echo "FAIL"; exit 1; }
|
|
udevadm trigger --type=subsystems --action=add
|
|
udevadm trigger --type=devices --action=add
|
|
create_dev_makedev
|
|
udevadm settle --timeout=30 || echo "udevadm settle failed"
|
|
echo "done"
|
|
;;
|
|
stop)
|
|
# Stop execution of events
|
|
udevadm control --stop-exec-queue
|
|
killall udevd
|
|
;;
|
|
*)
|
|
echo "Usage: $0 {start|stop}"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
|
|
exit 0
|