From: Bertram Scharpf <lists@...>
Date: 2007-08-16T20:27:18+09:00
Subject: Re: IO#seek and whence problem

Hi,

Am Mittwoch, 15. Aug 2007, 18:39:10 +0900 schrieb Brian Candler:
> On Wed, Aug 15, 2007 at 05:38:38PM +0900, Bertram Scharpf wrote:
> > I completely turned off optimization and distcc.
> > 
> > In <io.c> I put the following debug statements:
> > 
> >   static VALUE
> >   rb_io_seek(io, offset, whence)
> >       VALUE io, offset;
> >       int whence;
> >   {
> >       OpenFile *fptr;
> >       off_t pos;
> > 
> >       fprintf( stderr, "rb_io_seek: A; whence=%d\n", pos, whence);
> 
> Two arguments, one format specifier?
> 
> >       pos = NUM2OFFT(offset);
> >       fprintf( stderr, "rb_io_seek: B; pos=%d, whence=%d\n", pos, whence);
> 
> Remember that %d consumes an 'int', and off_t may be larger than int on your
> platform.

Arrrgh! Not more than a typo.

Anyway, this lead me to the core problem. There seems to be
some kind of mismatch between HAVE_OFF_T and HAVE_FSEEKO.
When I change

  681c681
  <     off_t pos;
  ---
  >     int pos;

everything works properly.

Seems to be a real bug.

Bertram