From: Nicolas Pitre <nico@cam.org>
Date: Mon, 19 Nov 2007 20:54:05 GMT
Subject: Re: [RFH] Flush progress message buffer in display().
Message-ID: <alpine.LFD.0.99999.0711191549510.19105@xanadu.home>
In-Reply-To: <7voddqm0l7.fsf@gitster.siamese.dyndns.org>

On Mon, 19 Nov 2007, Junio C Hamano wrote:

> Johannes Sixt <johannes.sixt@telecom.at> writes:
> 
> > I need this patch on Windows because appearently progress output is buffered
> > by stdio. Why doesn't Linux/glibc's stdio buffer output that goes to a pipe?
> > ...
> > ... What is flushing the progress
> > output?
> 
> The standard error stream is not "fully buffered":
> 
>     http://www.opengroup.org/onlinepubs/000095399/functions/xsh_chap02_05.html#tag_02_05
> 
> Not "fully buffered" means either "unbuffered" or "line
> buffered".  Because the progress display does not terminate its
> line, it means that the additional fflush(stderr) you added are
> needed if the stream is line buffered (still conforming).

Maybe stdio on Linux considers \r as a line termination.

Flushing stderr should not hurt anyway.


Nicolas