UNIX for Dummies Questions & Answers

#!/bin/ksh
fileflag=0 
timer1=0 
check_interval=120 # check every 2 minutes 
(( check_interval_minutes=${check_interval}/60 )) 
while [ ${timer1} -lt 180 ] 
do 
if [ -f /home/ab1234/files/abcd.dat ] 
then 
echo "My file exists now..." | mailx -s "File status" emailid
fileflag=1 
exit
else 
sleep ${check_interval} 
fi 
(( timer1=${timer1} ${check_interval_minutes} )) 
done 
#if it does not show up, send alert 
if [ ${fileflag} -eq 0 ] 
then 
echo "1 hours past. FIle still did not arrive" | mailx -s "File status ALERT!" emailid
fi 
# if it passes this point and  watch until file arrives 
while [ ${fileflag} -eq 0 ] 
do 
if [ -f /home/ab1234/files/abcd.dat ] 
then 
fileflag=1 
echo "File arrived and processesing at `date`" | mailx -s "File status" emailid
exit 
else 
sleep ${check_interval} 
fi

ksh: syntax error: `do' unmatched

. ./script.ksh .

$ . ./filewatcher.ksh .
ksh:  timer1=0 2 : syntax error

./filewatcher.ksh .

check_interval=120 # check every 5 minutes
(( check_interval_minutes=${check_interval}/60 ))

 
+ sleep 120
+ ((  timer1=0 2  ))
filewatcher.ksh[16]:  timer1=0 2 : syntax error