Mail Archives: cygwin/2004/09/16/08:02:26
--- Corinna Vinschen <corinna-cygwin AT cygwin DOT com> wrote:
> On Sep 16 10:47, Lionel Barnett wrote:
> > --- Corinna Vinschen <corinna-cygwin AT cygwin DOT com> wrote:
> > > > /netrel/src/cygwin-1.5.11-1/winsup/cygwin/fhandler.cc:263
> windows
> > > error
> > > > 59
> > > > 756 122627 [main] cat 2668 geterrno_from_win_error: unknown
> > > windows
> > > > error 59, setting errno to 13
> > >
> > > That looks really weird. Did you notice that win32 error 59
> means
> > > "An unexpected network error occurred." ?
> >
> > Yes, I was aware of that.
> >
> > > Does that give a hint to you?
> >
> > Um, not really... except that it appears the problem doesn't arise
> if
> > /tmp is accessed locally rather than over the network. However, I
> > constantly read/write/execute files all over the network via Cygwin
> > tools and have not encountered any problems previously. Is there
> > something special about /tmp that I am not aware of?
>
> I just curiously tried to reproduce the effect and it was pretty
> simple.
> I'm not quite sure, but it seems to be a strange interaction between
> remote file handling under windows, coupled with the way the
> temporary
> file is handled by bash.
>
> What bash does is this: It opens a temporary file in /tmp which gets
> everything you type into the here script up to the EOF. Then it
> duplicates the handle to become stdin for the still to be called
> `cat'
> process. Next, it unlinks the file. Unlink is implemented as
>
> h=CreateFile(FILE_FLAG_DELETE_ON_CLOSE);
> CloseHandle(h);
>
> This should result in removing the file as soon as all open handles
> to
> the file are closed. That works, but for some reason also the
> ReadFile
> call in cat fails as above.
>
> I don't know how to fix this right now, but the workaround is simply
> to have /tmp always be a local directory.
Thanks for the information, Corinna. Actually, what surprises me most
is that this issue has not been reported more frequently.
Regards,
=====
Lionel B
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