Time Difference

Shell Programming and Scripting
1

Hi Experts...

I want to calculate the time difference between two date-time values (using ksh). It can return the difference in hours (or whatever..)

For eg: time_diff "09/12/2009 12:30" "09/10/2009 12:30" should return 1464 hours...

 
$time_diff "09/12/2009 12:30:00" "09/10/2009 12:30:00"
1464.00
$time_diff "09/12/2009 13:36:09" "09/12/2009 13:30:00"
0.1025

Thanks...
PRKS

2

Try:

Use 3600, if you need to see in hours. 60 , if you need to se in minutes

echo $var1
09/12/2009 12:30:00
echo $var2
09/12/2009 13:30:00

echo "(`date +%s -d"$var2"` - `date +%s -d"$var1"`)/3600" | bc
1
3

Hi !
I am using ksh and its giving this error::

 
date: bad format character - s

Please help...

4

The format option 's' is only available with GNU date, so it's mostly Linux specific. But you might be able to use Perderabos datcalc script with a few adaptions.

5

Try this link, as there is no quick solutions available in unix.

6

If you can write script in PERL, then look at this module which can help you in identifying the difference between date: Date::Manip - search.cpan.org