#!/bin/bash -e

[[ $ACTION = add ]] || exit 0

UDEV_CONF=/etc/udev/udev.conf
[[ -f $UDEV_CONF ]] && . $UDEV_CONF
[[ -z $udev_permissions ]] && udev_permissions=/etc/udev/permissions.d

REFS="$DEVNAME $(udevinfo -r -q symlink -p $DEVPATH)"
logger -t $0 -p daemon.debug -- "checking references for $DEVNAME for permission
s: $REFS"
for node in $REFS; do
  [[ ! -b $node ]] && [[ ! -c $node ]] && [[ ! -L $node ]] && continue
  name=${node#/dev/}
  perms=$(grep -h "^$name" $udev_permissions/*.permissions | tail -1)
  set -- $(echo ${perms//:/ })
  [[ -z $2 ]] && continue
  logger -t $0 -p daemon.debug -- "applying permissions $2:$3:$4 to $DEVNAME (due to reference '$1')..."
  chgrp $2:$3 $DEVNAME
  chmod $4 $DEVNAME
done