>I assume that it's not failing on this:
>    if script -S /bin/sh 'echo OK' /dev/null 2>&1 | egrep 'OK' >/dev/null;
>because I don't think that MacOS X script supports -S.

Yes, that's correct.

The strange thing is ... the problem is _input_ redirection.  This
works fine on MacOS X:

% script > /dev/null

This hangs script in a tight loop:

% script < /dev/null

And I'm not sure where input redirection happens (I verified that standard
input was set to /dev/null via lsof).

>Does removing the output redirection to /dev/null on lines61 help?  If
>so, that's wierd but we could deal with it. 

I'll experiment some more.


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