Junio C Hamano <gits...@pobox.com> writes:

> Thomas Rast <tr...@inf.ethz.ch> writes:
>> I originally had a four-patch series to open 0/1/2 from /dev/null, but
>> then I noticed that this was shot down in 2008:
>>   http://thread.gmane.org/gmane.comp.version-control.git/93605/focus=93896
> The way I recall the thread was not "shot down" but more like
> "fizzled out without seeing a clear consensus".  As a normal POSIX
> program, we do rely on fd#2 connected to an error stream, and I do
> agree with the general sentiment of that old thread that it is very
> wrong for warning() or die() to write to a pipe or file descriptor
> we opened for some other purpose, corrupting the destination.
> I briefly wondered if we can do the sanity check lazily (e.g. upon
> first warning() see of fd#2 is open and otherwise die silently), but
> we may open a fd (e.g. to create a new loose object) that may happen
> to grab fd#2 and then it is too late for us to do anything about it,
> so...

I think we'd have to do it on startup.  Since we do many things already,
a few extra dup calls should hardly matter.

I'll send the patches in reply in a minute, I had them lying around
already.  But if you (again) decide that it's not worth it, I don't care
too deeply.

Thomas Rast
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