Hi all,

I've written a script which gives the below information...

End Date&Time: 2008-10-21 10.54.37

Now i want to calculate this time with the current time.. and if its more than 48 hours past with the current time it should echo "48 Hours back"

Please help me..

thanks in advance..

I can determine 'seconds since Epoch' on a file modification

> touch file286
> stat -c%Y file286
1224687447

> touch file287
> stat -c%Y file287
1224687482

> echo `stat -c%Y file287` - `stat -c%Y file286` | bc
35

When the dates are not matching... it could be a problem...


Guess this could not work...


Hope we have to find the current date and matching with the log file date.. and subtract and if less than blah blah then + or - 86400...

dont know how to write the same...

Please help...

Since you said you had a script which gives ending date/time... figured you could

>touch /home/user/script_123.done

>touch /home/user/script_123.restart

>time_elap=$(echo `stat -c%Y script_123.restart` - `stat -c%Y script_123.done` | bc)

joeyg's answer is MUCH easier than coding this:

#!/bin/ksh

# two parms
# $1 = number of hours
# $2 = date in YYYY mm dd hh mi ss format
# prints  1 if date is older than  now minus <number of hours>
# prints 0 when not older
isolder()
{
	ago="$1"
	echo "$2" | sed 's/\./ /g' | sed 's/-/ /g' | read dt
	perl -e  ' 
	        use Time::Local;
	        $then = time - ( $ARGV[0] * 3600);
	        $testtime =
	           timelocal( $ARGV[6], $ARGV[5], $ARGV[4],
	                      $ARGV[3], $ARGV[2]-1, $ARGV[1]-1900);
	        $result = 0;
	        if ( $testtime < $then )
	        {
	            $result = 1;
	        }
            print "$result\n";
	        '  $ago  $dt
}

dt="2008-10-21 10.54.37"
# sample usage:
result=$(isolder 48 "$dt" )
if [[ $result -eq 1 ]] ; then
  echo "$dt is older than 48 hours"
else
  echo "$dt is not older than 48 hours"  
fi  
dt="2008-10-19 10.54.37"
result=$(isolder 48 "$dt" )
if [[ $result -eq 1 ]] ; then
  echo "$dt is older than 48 hours"
else
  echo "$dt is not older than 48 hours"  
fi