Shell Programming and Scripting

while true; do 
  test -f $DIR/$FILE || next
  echo -n `date +%s`:
  if lsof $DIR/$FILE ; then
    echo "$FILE is open";
  else
    echo "$FILE is CLOSED";
done

#!/bin/bash

# Assuming you will use fileschaned output to get new filename 
# and also assuming that you will want to test THIS process before
# trying to incorperate fileschanged into the process...
# I wrote this as a test of the lsof side of the code.


# Assuming you test from your (not root) home directory and use sudo
# change as needed

WHO=`who am i |awk '{print $1}'`
DIR="/home/$WHO"
FILE=".test1.txt.swp"
CTR=0

while true
do
        # Attempt to sanely exit after 3 runs
        if [ "$CTR" -eq 3 ]
        then
                killall vim
        fi

        # Do you file open/closed logic here
        if [ -f $DIR/$FILE ]
        then
                LSOF=`lsof $DIR/$FILE`
        else
                unset LSOF
        fi
        echo -n `date +%s`:
        if [ -n "$LSOF" ]
        then
                echo "$DIR/$FILE is OPEN";
        else
                echo "$DIR/$FILE is CLOSED";
                exit
        fi
        CTR=`expr $CTR + 1`
done