#!/bin/sh
  #
  # Called from udev
  #
  # Attempt to mount any added block devices and umount any removed devices
  
  BASE_INIT="`readlink -f "/sbin/init"`"
  INIT_SYSTEMD="/lib/systemd/systemd"
  
  if [ "x$BASE_INIT" = "x$INIT_SYSTEMD" ];then
      # systemd as init uses systemd-mount to mount block devices
      MOUNT="/usr/bin/systemd-mount"
      UMOUNT="/usr/bin/systemd-umount"
  
      if [ -x $MOUNT ] && [ -x $UMOUNT ];
      then
          logger "Using systemd-mount to finish mount"
      else
          logger "Linux init is using systemd, so please install systemd-mount to finish mount"
          exit 1
      fi
  else
      MOUNT="/bin/mount"
      UMOUNT="/bin/umount"
  fi
  
  PMOUNT="/usr/bin/pmount"
  
  for line in `grep -h -v ^# /etc/udev/mount.blacklist /etc/udev/mount.blacklist.d/*`
  do
  	if [ ` expr match "$DEVNAME" "$line" ` -gt 0 ];
  	then
  		logger "udev/mount.sh" "[$DEVNAME] is blacklisted, ignoring"
  		exit 0
  	fi
  done
  
  automount_systemd() {
      name="`basename "$DEVNAME"`"
  
      # Skip the partition which are already in /etc/fstab
      grep "^[[:space:]]*$DEVNAME" /etc/fstab && return
      for n in LABEL PARTLABEL UUID PARTUUID; do
          tmp="$(lsblk -o $n $DEVNAME | sed -e '1d')"
          test -z "$tmp" && continue
          tmp="$n=$tmp"
          grep "^[[:space:]]*$tmp" /etc/fstab && return
      done
  
      [ -d "/run/media/$name" ] || mkdir -p "/run/media/$name"
  
      MOUNT="$MOUNT -o silent"
  
      # If filesystemtype is vfat, change the ownership group to 'disk', and
      # grant it with  w/r/x permissions.
      case $ID_FS_TYPE in
      vfat|fat)
          MOUNT="$MOUNT -o umask=007,gid=`awk -F':' '/^disk/{print $3}' /etc/group`"
          ;;
      # TODO
      *)
          ;;
      esac
  
      if ! $MOUNT --no-block -t auto $DEVNAME "/run/media/$name"
      then
          #logger "mount.sh/automount" "$MOUNT -t auto $DEVNAME \"/run/media/$name\" failed!"
          rm_dir "/run/media/$name"
      else
          logger "mount.sh/automount" "Auto-mount of [/run/media/$name] successful"
          touch "/tmp/.automount-$name"
      fi
  }
  
  automount() {
  	name="`basename "$DEVNAME"`"
  
  	if [ -x "$PMOUNT" ]; then
  		$PMOUNT $DEVNAME 2> /dev/null
  	elif [ -x $MOUNT ]; then
  		$MOUNT $DEVNAME 2> /dev/null
  	fi
  
  	# If the device isn't mounted at this point, it isn't
  	# configured in fstab
  	grep -q "^$DEVNAME " /proc/mounts && return
  
  	! test -d "/run/media/$name" && mkdir -p "/run/media/$name"
  	# Silent util-linux's version of mounting auto
  	if [ "x`readlink $MOUNT`" = "x/bin/mount.util-linux" ] ;
  	then
  		MOUNT="$MOUNT -o silent"
  	fi
  
  	# If filesystem type is vfat, change the ownership group to 'disk', and
  	# grant it with  w/r/x permissions.
  	case $ID_FS_TYPE in
  	vfat|fat)
  		MOUNT="$MOUNT -o umask=007,gid=`awk -F':' '/^disk/{print $3}' /etc/group`"
  		;;
  	# TODO
  	*)
  		;;
  	esac
  
  	if ! $MOUNT -t auto $DEVNAME "/run/media/$name"
  	then
  		#logger "mount.sh/automount" "$MOUNT -t auto $DEVNAME \"/run/media/$name\" failed!"
  		rm_dir "/run/media/$name"
  	else
  		logger "mount.sh/automount" "Auto-mount of [/run/media/$name] successful"
  		touch "/tmp/.automount-$name"
  	fi
  }
  
  rm_dir() {
  	# We do not want to rm -r populated directories
  	if test "`find "$1" | wc -l | tr -d " "`" -lt 2 -a -d "$1"
  	then
  		! test -z "$1" && rm -r "$1"
  	else
  		logger "mount.sh/automount" "Not removing non-empty directory [$1]"
  	fi
  }
  
  # No ID_FS_TYPE for cdrom device, yet it should be mounted
  name="`basename "$DEVNAME"`"
  [ -e /sys/block/$name/device/media ] && media_type=`cat /sys/block/$name/device/media`
  
  if [ "$ACTION" = "add" ] && [ -n "$DEVNAME" ] && [ -n "$ID_FS_TYPE" -o "$media_type" = "cdrom" ]; then
      # Note the root filesystem can show up as /dev/root in /proc/mounts,
      # so check the device number too
      if expr $MAJOR "*" 256 + $MINOR != `stat -c %d /`; then
          if [ "`basename $MOUNT`" = "systemd-mount" ];then
              automount_systemd
          else
              automount
          fi
      fi
  fi
  
  if [ "$ACTION" = "remove" ] || [ "$ACTION" = "change" ] && [ -x "$UMOUNT" ] && [ -n "$DEVNAME" ]; then
      for mnt in `cat /proc/mounts | grep "$DEVNAME" | cut -f 2 -d " " `
      do
          $UMOUNT $mnt
      done
  
      # Remove empty directories from auto-mounter
      name="`basename "$DEVNAME"`"
      test -e "/tmp/.automount-$name" && rm_dir "/run/media/$name"
  fi