Using bc in bash script

[Jez Hancock]

On Thu, Aug 14, 2003 at 10:46:45AM -0500, Charles Howse wrote:
> Hello List,
> 
> I've migrated from Redhat Linux 9 to FreeBSD 4.8-RELEASE, character mode
> - no gui.
> 
> I'm trying to calculate the number of seconds between $start_time and
> $end_time in a bash script.
> 
> Start_time=`date +%s` # Seconds past midnight at start of script
> [ do lots of stuff ]
> End_time=`date +%s`   # Seconds past midnight at end of script
> 
> Then I want to: et=`bc $end_time - $start_time` to get the number of
> seconds or fractions of seconds elapsed.
How about:

et=`echo "$end_time - $start_time" | bc`

-- 
Jez

http://www.munk.nu/