> > > I think the test is mhparam(1)'s checking for a TTY on FDs 0, 1, and
> > > 2. OpenBSD's man page says $SHELL is used. Perhaps the test can
> > > make use of this.
> > >
> > > $ cat >cmd
> > > #! /bin/sh
> > >
> > > mhparam path
> > > $ chmod +x cmd
> > > $ SHELL=`pwd`/cmd script
I went with this approach. And I had to add a run-time check that
script(1) does what we want, by making the program that it runs
look like it's connected to a terminal. I don't see any obvious
pattern for that: FreeBSD 10 and Fedora 24 do, Fedora 18 on ARM7
and Ubuntu 14 don't. Anyway, the test should be robust now.
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