Shell Programming and Scripting

#!/usr/bin/env ksh
trap "rm -f /tmp/PID$$.*; exit" EXIT 2 3 15

incoming_dir=/path/of/incoming/directory

if ! cd $incoming
then
    echo "unable to switch to incoming directory"
    exit 1
fi

wrk_list=/tmp/PID$$.wrk
file_list=/tmp/PID$$.file
while true
do
    delay=300               # default to short delay
    find . -name "*done" >$wrk_list
    while read done_file                # find and process all done files
    do
        base=${done_file%%.*}
        find . -name "*${base##*_}*" >$file_list
        while read file
        do
            echo "put command(s) to load file into db here"
            delay=3600      # did work, sleep longer
        done <$file_list
    done <$wrk_list

    sleep $delay        # wait for (more) work
done