#!/bin/bash
# Recreate fstab entries in /etc/fstab and make /media directories
# This script is called by udev rules, see /lib/udev/rules.d/
#
# Author: Tomas M <http://slax.linux-live.org/>

# Variables available in udev environment:
# $ACTION (eg: add, remove)
# $DEVNAME (full device node name including path)
# $DEVTYPE (eg: disk)
# $ID_FS_TYPE (eg: ext3)
# $MAJOR and $MINOR numbers
# $SUBSYSTEM (eg: block)

PATH=$PATH:/usr/bin:/usr/sbin:/bin:/sbin

BAS="$(basename "$DEVNAME")"
UNIT="media-$BAS.mount"
MNT="/media/$BAS"
TARGET="/etc/systemd/system/$UNIT"


# exit if noautomount boot parameter is present
if cat /proc/cmdline | grep -q noautomount; then
   exit
fi

# exit if 'automount' boot parameter is missing
if ! cat /proc/cmdline | grep -q automount; then
   exit
fi


if [ "$ACTION" = "add" -o "$ACTION" = "change" ]; then
   if [ ! -r "$TARGET" ]; then # skip if exists

      if [ "$ID_FS_TYPE" != "" -a "$(cat /proc/filesystems | grep "$ID_FS_TYPE")" != "" ]; then

         mkdir -p "$MNT"

         echo "[Unit]" >$TARGET
         echo "Description=Disk $BAS" >>$TARGET
         echo "" >>$TARGET
         echo "[Mount]" >>$TARGET
         echo "What=$DEVNAME" >>$TARGET
         echo "Where=$MNT" >>$TARGET
         echo "Type=$ID_FS_TYPE" >>$TARGET
         echo "Options=defaults" >>$TARGET
         echo "" >>$TARGET
         echo "[Install]" >>$TARGET
         echo "WantedBy=multi-user.target" >>$TARGET

         systemctl enable $UNIT
         systemctl start $UNIT

         gtk-bookmarks-update
         DISPLAY=:0.0 pcmanfm -n file://$MNT >/dev/null 2>&1
      fi
   fi
fi

if [ "$ACTION" = "remove" ]; then
   systemctl disable $UNIT
   rm "$TARGET"
   rmdir "$MNT"
   gtk-bookmarks-update
fi