RE: cygwin fork()

["Gary R. Van Sickle" <g dot r dot vansickle at worldnet dot att dot net>]

> From: Christopher Faylor
> Sent: Friday, September 01, 2006 1:01 PM
> Subject: Re: cygwin fork()
> 
> On Fri, Sep 01, 2006 at 06:57:10PM +0100, Dave Korn wrote:
> >On 01 September 2006 18:47, clayne wrote:
> >>I found the real culprit, which I had also ifdef'd out because it 
> >>looked bogus and crufty:
> >>
> >>/* Return 1 if a seek on FD will succeed. */ #ifndef __CYGWIN__ #  
> >>define fd_is_seekable(fd) (lseek ((fd), 0L, SEEK_CUR) >= 0) 
> #else #  
> >>define fd_is_seekable(fd) 0 #endif /* __CYGWIN__ */
> >
> >Yeeesh.  This is a terrible way of dealing with the fact 
> that you can't 
> >seek a stream accurately if you open it in text mode, because of the 
> >ambiguity about whether you've advanced one or two chars through the 
> >underlying file when you see an LF that could perhaps have actually 
> >been a CR/LF.  What we really want is
> 
> AFAIK, Cygwin's lseek should handle seeking on text streams.  
> DJ implemented that years ago.
> 

Last I looked, which was admittedly also years ago, it was "#if 0"'ed out,
with a comment to the effect of "Nobody has any business seeking around in
text files."

-- 
Gary R. Van Sickle
 


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