Shell Programming and Scripting

stamp="$( date '+%Y%m%d%H%M%S' ).$$"

tmpf="/var/tmp/$$.tmp"

cleantmp()
{
    echo "cleaning tmp files ..."
    rm -f "$tmpf" 2>/dev/null
}

#main
trap 'cleantmp'   EXIT
do_your_job
use_tmpf "$tmpf"

# on exit your tmp file is removed, if process is not stopped using signal 9 (=and I mean it).

#!/bin/ksh
set -vx
PID=$$
echo "parent PID =$$"
echo "calling process1"
. $TEMP_DIR/file5
stat=$?
echo $stat
echo "calling process2"
. $TEMP_DIR/file6 &
PID2=$!
export PID2
echo "PID2= $PID2"
echo "PID1= $PID"
wait "$PID2"
status=$?
echo $status
if [ "$status" = "0"  ];then
        echo "file1 successful"
else
        echo "file1 failed"
       ## exit 1;
fi

if [ $stat -eq 0 ];then
        echo "file2 successful"
else
        echo "file2 failed"
        ##exit 1;
fi

#!/bin/ksh
set -vx
PID=$$
echo "parent PID =$$"
echo "calling process1"
. $TEMP_DIR/file5 &
PID2=$!
export PID2

echo "calling process2"
. $TEMP_DIR/file6 
status=$?
echo $status
 
echo "PID2= $PID2"
echo "PID1= $PID1"
if [ "$status" = "0"  ];then
        echo "file1 successful"
else
        echo "file1 failed"
        exit 1;
fi
wait "$PID2"
stat=$?
echo $stat
if [ $stat -eq 0 ];then
        echo "file2 successful"
else
        echo "file2 failed"
        exit 1;
fi