[Bug 9142] wcmd can't open locked files

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=9142





--- Comment #13 from Peter Dons Tychsen <donpedro at tdcadsl.dk>  2009-10-16 19:46:22 ---
OK now is see the bug.
Tricky!

I think the problem is in the wine-server:

1) wine-server opens all file with O_NONBLOCK. As described here:
http://linux.die.net/man/2/fcntl, the O_NONBLOCK can result in a EAGAIN if
there is a lock present.

2) EAGAIN is translated into a sharing violation in wine-server, and then it is
game over.

EAGAIN makes sense on unix programs (who might understand it and try again),
but i am not sure it makes that much sense for a windows program. I am not sure
Windows has this concept. Therefore setting O_NONBLOCK might be incorrect.

The attached patch removes O_NONBLOCK, and allows Andrews example to work.

Removing O_NONBLOCK might have the side effect that it will take longer for
dead network links to time-out, but i think this is OK as that actually
emulates very well what happens on Windows (net time-outs take forever on
windows).

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