# smartumount folder-to-unmount

 # smartumount /mnt/ipod

#!/bin/bash

if [ `whoami` != "root" ]; then
      echo "You must run this as root"
      exit
fi

# testing args
if [ $# -ne 1 ]; then
  echo "usage : $0 <device_or_directory_to_unmount>"
  exit
fi

dir=$1

# first try unmounting it without doing anything special
testumount=`umount $dir 2>&1`
if [ `echo $testumount | grep "not mounted" | wc -l` -gt 0 ]; then
      echo "$1 isn't mounted, exiting"
      exit
fi
if [ `echo $testumount | grep "not found" | wc -l` -gt 0 ]; then
  echo "$1 does not exists, exiting"
  exit
fi

if [ `echo $testumount | grep busy | wc -l` -gt 0 ]; then
       echo "Having trouble, checking famd..."
else
     echo "unmounted $dir without any trouble..."
     exit
fi

# check famd
if [ `ps -e |grep famd|wc -l` -gt 0 ]; then
      /etc/init.d/famd restart
      # try unmounting again
      if [ `umount $dir 2>&1 | wc -l` -gt 0 ]; then
            echo "I tried restarting famd, but that didn't work. checking xinetd"
      else
            echo "Unmounted $dir by restarting famd"
            exit
      fi
else
      echo "famd isn't running so it couldn't be that.."
fi


# check xinetd
if [ `ps -e | grep xinetd | wc -l` -gt 0 ]; then
      /etc/init.d/xinetd stop
      # try unmounting again
      if [ `umount $dir 2>&1 | wc -l` -lt 1 ]; then
            /etc/init.d/xinetd start
            echo "Unmounted $1 by restarting xinetd"
            exit
      fi
      /etc/init.d/xinetd start
      echo "I tried stopping xinetd, but that didn't work."

else
      echo "xinetd isn't running so it couldn't be that.."
fi

echo
echo "I'm going to list processes that are using the folder you are 
trying to umount. Answer whether you'd like to kill them or not. 
You should look up each process before you answer. use the 
following command in a separate shell:"
echo
echo "	ps -e | grep <pid>"
echo
echo "where <pid> is the number of the process."
echo
fuser -ki $dir
echo
if [ `echo $testumount | grep busy | wc -l` -gt 0 ]; then
      echo "OK, this is the last resort. Do you want to umount the volume using "
      echo "the -l option? According to the umount man page -l means:"
      echo
      echo "	Lazy unmount. Detach the filesystem from the filesystem 
      hierarchy now, and cleanup all references to the filesystem as 
      soon as	it is not busy anymore.  (Requires kernel 2.4.11 or later.)"
      echo
      echo "Use -l option? (y\n)"
      read yn
      if [ $yn == "y" ]; then
            umount -l $dir
      else
            echo "OK. Sorry I couldn't help"
      fi
else
      echo "You're all good :)"
fi

exit