calculating difference of times


Matthias Apitz writes:

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

I don't know if there's something already available. (Sorry -
never had this problem.)
If the format is fixed, then parsing it with awk is trivial.
After that, the math should be doable with "expr".


Robert Huff


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