Shell Programming and Scripting

ps -ef | grep "stats.sh" | grep -v "grep"

ps -ef | grep "stats.sh" | grep -v "grep" > /var/tmp/stats.tmp
namedtmp=/var/tmp/stats.tmp
if [ -s $namedtmp ]
then
exit
else
then continue on with script
fi

pidfile=/var/tmp/stats.pid

# exit if another is running
[ -e "$pidfile" ] && exit

# create pid file
echo $$ >"$pidfile"

# delete pid file on exit (may have to do this definitely depending on shell)
trap "rm $pidfile" EXIT

#!/bin/ksh

myPID="$$"
echo "My pid->[${myPID}]"
FUSERout=$(${FUSER} $0 2>/dev/null)
echo "fuser ->[${FUSERout}]"
numProc=$(echo "${FUSERout}" | nawk '{print NF}')
if [ "${numProc}" -gt 1 ]; then
   echo "[$0]: is ALREADY running - bailing..."
   exit
fi

....
here goes the rest of your script

if [ -e "$pidfile" ]
then
    [ -d /proc/$(cat "$pidfile") ] && exit
    echo "Removing stale pidfile: $pidfile"
    rm -f "$pidfile"
fi

p_count=`ps -ef | grep process.sh | grep -v "grep" | wc -l`
if test $p_count -le 1
then

your script

else
echo "Script is Already Running with Another User,Please try after some time"