Hi,
I'll get a file whose first line comprises of system name, timestamp of file creation and the seq number. System name and seq num I need to other computation. My requirement is, I'll have to check whether the timestamp is greater than current timestamp and also check if the timestamp is older than 24hrs of the current timestamp. If so, then generate the error with the description. I have written the following script but it is not working as desired. Please correct the script..

#!/bin/ksh

eval $(awk 'NR==1 {
printf "sys_nam=\"%s\"\n", substr($0,1,length-17) ## system_name
printf "header_tstamp=\"%s\"\n", substr($0,length-16, 14) ## timestamp
printf "in_seq_num=\"%s\"\n", substr($0, length-2) ## seq_num
}' $1)

header_day=`echo $header_tstamp | cut -c7-2`
sys_tstamp=`date +%Y%m%d%H%M%S`
sys_day=`date +%d`
prev_day=`expr $sys_day - 1`

if [ $header_tstamp > $sys_tstamp ]
then
notice_val="102"
notice_desc="Time stamp incorrect format"
elif [ $header_day < $prev_day ]
then
notice_val="102"
notice_desc="Time stamp incorrect format"
else
notice_val="000"
notice_desc="Success"
fi

echo "$header_tstamp"
echo "$sys_tstamp"
echo "$header_day"
echo "$sys_day"
echo "$prev_day"
echo "$notice_val"
echo "$notice_desc"

Mandab,
Try changing the "<" and ">" in your "if" statements as follows:

if [ $header_tstamp -gt $sys_tstamp ]
...
elif [ $header_day -lt $prev_day ]

Thank you very much !!