Shell Programming and Scripting

 
 
#! /usr/bin/ksh
echo enter first time stamp
read TIME1
echo enter second time stamp
read TIME2
H1=`echo $TIME1 | cut -d\: -f1`
M1=`echo $TIME1 | cut -d\: -f2`
H2=`echo $TIME2 | cut -d\: -f1`
M2=`echo $TIME2 | cut -d\: -f2`
S1=`echo $TIME1 | cut -d\: -f3`
S2=`echo $TIME2 | cut -d\: -f3`
#echo $H1 $M1 $S1 $H2 $M2 $S2
        if [ $H1 -eq $H2 ]
        then
                ((MA1=M1*60+S1))
                ((MA2=M2*60+S2))
                ((MA1>MA2)) && ((MA2=MA2+86400))
                ((diff=MA2-MA1))
 
                                if [ $diff -lt 10 ]
                                then
                                        diff="0"$diff
                                fi
 
                echo $diff
        else
                ((H1>H2)) && ((H2=H2+24))
                ((diff=H2-H1))
                ((MA1=M1*60+S1))
                ((MA2=M2*60+S2))
                ((MA1>MA2)) && ((MA2=MA2+86400))
                ((diff2=MA2-MA1))
                ((diff2=diff2+diff*3600))
                                                        if [ $diff2 -lt 10 ]
                                                        then
                                                                diff2="0"$diff2
                                                        fi
                echo $diff2
        fi