Re: [PATCH] mingw: do not crash on open(NULL, ...)

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On Thu, Sep 23, 2010 at 10:35 AM, Erik Faye-Lund <kusmabite@xxxxxxxxx> wrote:
> Since open() already sets errno correctly for the NULL-case, let's just
> avoid the problematic strcmp.
>
> Signed-off-by: Erik Faye-Lund <kusmabite@xxxxxxxxx>

I guess I should add a comment as to why this patch is needed:

This seems to be the culprit for issue 523 in the msysGit issue
tracker: http://code.google.com/p/msysgit/issues/detail?id=523

fetch_and_setup_pack_index() apparently pass a NULL-pointer to
parse_pack_index(), which in turn pass it to check_packed_git_idx(),
which again pass it to open(). This all looks intentional to my
(http.c-untrained) eye.

The code in mingw_open was introduced in commit 3e4a1ba (by Johannes
Sixt), and the lack of a NULL-check looks like a simple oversight.
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