Re: Zsh 4.3.12: subshell in midnight commander: precmd: 15: bad file descriptor

[Peter Stephenson <Peter.Stephenson@xxxxxxx>]

On Mon, 18 Jul 2011 08:52:34 -0700
Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote:
> I wonder if the underlying problem doesn't somehow stem from this:
> 
>       * 27721: Src/compat.c [with unnecessary test removed], Src/exec.c,
>       Src/system.h, Src/utils.c:  update zopenmax() not to examine huge
>       numbers of file descriptors; only call it at initialisation;
>       rationalise use of fdtable_size and expansion of fdtable.

I skipped over this yesterday, but are you suggesting we call zopenmax()
with a larger limit when the user tries to manipulate an fd we don't
know about?  (Simply pushing the limit in zopenmax() up unconditionally
doesn't look like a robust fix.)

I'm not sure if we gain much with that:  we still have to trap the
points where we are passed a large enough fd, and until the shell wishes
to do something with the intervening values it has no particular need to
know about them.  But there could easily be a subtlety I've missed.

-- 
Peter Stephenson <pws@xxxxxxx>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
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