> > There were lots of uses of "date" that I suspect may give us portability
> > problems. "+%s" is not even in POSIX, but maybe it is universal enough.
> > But stuff like '-d "+2 seconds"' seems likely to be a GNU-ism.
> >
> > Using "test-tool date" might get around some of that. We even understand
> > relative dates like "2 seconds ago", but I think only in the past. :-/
> > So you'd probably have to do:
> >
> >   now=$(test-tool date timestamp now | cut -d' ' -f3)
> >   then=$((now + 2))
> >   test-tool date show:rfc2822 $then
> >
> > or something.
> 
> I was not aware about test-tool, thanks!