Re: [HACKERS] Bad bug in fopen() wrapper code

Bruce Momjian wrote:
> Magnus Hagander wrote:
> > > >> Now, I still twist my head around the lines:
> > > >> if ((fd = _open_osfhandle((long) h, fileFlags & O_APPEND)) < 0
> > > >> ||
> > > >> (fileFlags & (O_TEXT | O_BINARY) && (_setmode(fd, fileFlags &
> > > (O_TEXT
> > > >> | O_BINARY)) < 0)))
> > >
> > > > Without having studied it closely, it might also highlight a bug
> > > on
> > > > failure of the second clause -- if the _setmode fails, shouldn't
> > > > _close be called instead of CloseHandle, and -1 returned?
> > > > (CloseHandle would still be called on failure of the
> > > _open_osfhandle,
> > > > obviously)
> > >
> > > I agree that this code is both wrong and unreadable (although in
> > > practice the _setmode will probably never fail, which is why our
> > > attention hasn't been drawn to it). Is someone going to submit a
> > > patch? I'm hesitant to change the code myself since I'm not in a
> > > position to test it.
> >
> > I can look at fixing that. Is it something we want to do for 8.2, or
> > wait until 8.3? If there's a hidden bug, I guess 8.2?
>
> Magnus, is this the right fix?

Claudio sent me some small updates to the patch; updated version
attached.

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Bruce Momjian bruce(at)momjian(dot)us
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