Re: AT_CHECK_INTERACTIVE

[Paul Eggert]

Ralf Wildenhues <address@hidden> writes:

> I'm a bit afraid this warning in autoconf.info(File Descriptors):
> |    Don't rely on open file descriptors being open in child processes.
> | In `ksh', file descriptors above 2 which are opened using `exec N>file'
> | are closed by a subsequent `exec' (such as that involved in the
> | fork-and-exec which runs a program or script). [...]
>
> may torpedo this nice idea; not to speak of Ultrix, of course.

For ksh I think/hope we're OK, since the problem applies only for
exec'ed programs, whereas all the fiddling you're doing is within ksh
itself.  I haven't tested your approach among ksh versions, though.