Shell Programming and Scripting

#!/usr/bin/ksh                                                                            
while true
do
day=`date +%a`
time=`date +%H%M`
str1 = "bad Parm"
str2 = "wrong parm"
cd sri
if [  $day = "Mon" -o $day = "Tue" -o $day = "Wed" -o $day = "Thu" -o $day = "Fri" ] ;
then
        if [ $time -gt 0700 -a $time -le 0900 ]; then
           grep -e "$str1" -e "$str2" *.log
           mail -s "Alert" "sri123@gmail.com"
        else
           echo "Exit successfully"            

        fi
done

 Server mapping to server section and picking a place to call home...
   . . . mapped . . .
   . . . looking for domain . . .
   . . . Found domain & got the lock; now looking for a free slot . . .
   . . . looking . . .
   . . . looking . . .
   . . . looking . . .
   . . . Found one and I'm taking it!  Now let go of the lock . 

* Immediate sarting .  My PID is: 123456


bad parm. (GET:DATE)
bad parm. (GET:DATE)
bad parm. (GET:DATE)

date can't be a correct date

wrong parm. (NEXT.date)
wrong parm. (NEXT.date)
wrong parm. (NEXT.date)

while true
do
   day=`date +%a`
   time=`date +%H%M`
   str1="bad Parm"
   str2="wrong parm"
   cd sri
   if [  $day = "Mon" -o $day = "Tue" -o $day = "Wed" -o $day = "Thu" -o $day = "Fri" ]
   then
      if [ $time -gt 0700 -a $time -le 0900 ]
      then
         ls -1 *.log 2>/dev/null | while read log
         do
            grep -i -e "$str1" -e "$str2" $log && {
               mail -s "Alert" "sri123@gmail.com"
               pid=$(grep " PID.*:" $log | head -1 | sed 's/ *$//; s/.* //;')
               [[ -n "$pid" ]] && kill -9 $pid
            }
         done
      else
         echo "Exit successfully"
      fi
   fi
   sleep 900
done

+ true
+ set = xv
date +%a
++ date +%a
+ day=Thu
date +%H%M
++ date +%H%M
+ time=1036
+ str1='bad Parm'
+ str2='wrong parm'
+ cd /home/rkd/Desktop
+ '[' Thu = Mon -o Thu = Tue -o Thu = Wed -o Thu = Thu -o Thu = Fri ']'
+ '[' 1036 -gt 0700 -a 1036 -le 0900 ']'
+ echo 'Exit successfully'
Exit successfully
+ sleep 900