calculating difference of times

[Matthias Apitz]

Hello,

Do we have something (in the ports) to calculate easy the difference of
two times given as hh:mm - hh:mm? Some hack in bc(1) or something like
this? Well, I could translate the times into UNIX seconds of epoche,
build the diff and reconvert, but something more easy (and not in Perl
or C, just shell); thanks

	matthias
-- 
Matthias Apitz
e <guru at unixarea.de> - w http://www.unixarea.de/
UNIX since V7 on PDP-11, UNIX on mainframe since ESER 1055 (IBM /370)
UNIX on x86 since SVR4.2 UnixWare 2.1.2, FreeBSD since 2.2.5