Re: CVS commit: src/lib/libc/stdio

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Thu, May 06, 2010 at 02:48:32PM +0200, Joerg Sonnenberger wrote:
> On Thu, May 06, 2010 at 08:51:29AM +0000, David Holland wrote:
> > On Thu, May 06, 2010 at 08:14:08AM +0000, Jukka Ruohonen wrote:
> >  > Correct the discussion about return values: fileno() may fail and return 
> > -1.
> >  > Note that in such cases the NetBSD implementation does not set errno to
> >  > EBADF, hence diverging from the standard in this small detail.
> > 
> > How is that not just a bug?
> 
> -1 is a valid answer for not file-backed FILEs. I don't think it is an
> error.

RETURN VALUE

    Upon successful completion, fileno() shall return the integer value of
the file descriptor associated with stream. Otherwise, the value -1 shall be
returned and errno set to indicate the error.

ERRORS

    The fileno() function may fail if:

    [EBADF]
        The stream argument is not a valid stream, or the stream is not
        associated with a file.

Isn't the above EBADF exactly what you are after?

- Jukka.