#! /bin/ksh 

list=/tmp/999
tmpfile=/tmp/444".tmp"
tmpdate=/tmp/444".date"
tmphour=/tmp/444".hour"
tmpatt=/tmp/444".att"
tmpok=/tmp/444".ok"
tmpno=/tmp/444".no"

grabentry(){
start=$1
end=$2

while [ $start -le $end ]
do
    eval "awk '\$1 ~ /$date/ && \$2 ~ /$hour:$start:/ {print \$0}'" $list
    start=`expr $start + 1`
    if [ $start -lt 10 ]
    then
        start=0$start
    fi
done
}


rm /tmp/444.* 2> /dev/null

## 
## uncomment next 7 lines if script performance slows
#awk -F" " '{print $1 | "sort -u"}' $list > $tmpdate
#awk -F" " '{print $2}' $list | awk -F":" '{print $1 | "sort -u"}' > $tmphour
#
#for date in `< $tmpdate`
#do
#    for hour in `< $tmphour`
#    do
for date in `awk -F" " '{print $1 | "sort -u"}' $list`                                #<--| comment out if above 7 lines are uncommented
do                                                                                    #<--|                                                                          
    for hour in `awk -F" " '{print $2}' $list | awk -F":" '{print $1 | "sort -u"}'`   #<--|
   do                                                                                 #<--|                                                                                                 
        end=4
        while [ $end -le 59 ]
        do
            if [ $end -lt 10 -a $end -ne 00 ]
            then
                end=0$end
            fi
            start=`expr $end - 4`
            if [ $start -eq 0 ]
            then
                start=00
            fi
            if [ $start -lt 10 -a $start -ne 00 ]
            then
                start=0$start
            fi
            grabentry $start $end | awk 'NF > 0' > $tmpfile.$date.$hour.$end 
            if [ ! -s $tmpfile.$date.$hour.$end ]
            then
                rm $tmpfile.$date.$hour.$end 2> /dev/null
            else
                echo "-- cutoff time is $date $hour.$end --"  ## echo line used for debugging, can be removed
                cat $tmpfile.$date.$hour.$end                 ## replace this line with code to process, create and format report
            fi
            end=`expr $end + 5`
        done
    done
done

exit 0