There isn't much to rip off, the whole thing is a few dozen lines long, trivial utility. The program name is probably a bona fide reference to the app.

The source code of caffeinate(8) is available at http://opensource.apple.com/source/PowerManagement/PowerMana...

Hmm, never heard of that, but I can see myself using this caffeinate command quite often.

Sometimes I leave command line programs running overnight then get annoyed when I find that my Mac went to sleep after an hour because I'd forgotten to adjust the power saving settings.

So running caffeinate -u <my command> will be very handy indeed

Quite obvious ripoff, too. Apple could at least have named it "nosleep" or something like that.

More importantly, it'll make these utilities easier to write.