GNU bug report logs - #12908
24.3.50; file `emacs_backtrace.txt'?

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Package: emacs;

Reported by: "Drew Adams" <drew.adams <at> oracle.com>

Date: Fri, 16 Nov 2012 18:32:01 UTC

Severity: normal

Found in version 24.3.50

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 12908 <at> debbugs.gnu.org
Subject: bug#12908: 24.3.50; file `emacs_backtrace.txt'?
Date: Sat, 17 Nov 2012 21:19:36 -0800

On 11/17/2012 08:04 PM, Eli Zaretskii wrote:
> The
> problem is in detecting when stderr is closed or an invalid handle to
> begin with, and do the redirection only then.  In all my readings and
> tests, I was unable to find a reliable, let alone documented, way of
> determining that.

The method I gave in <http://bugs.gnu.org/12908#73>
is portable to GNU and POSIXish hosts, where you can test whether
a file descriptor FD is valid by invoking dup2 (FD, FD).
Gnulib has a dup2 implementation that works on Microsoft Windows,
so if we use that, it seems we should be able to use the same idea
there too.
This bug report was last modified 12 years and 243 days ago.

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