Re: Problem with recent sys/kern/sys_pipe.c changes

[David Laight <david%l8s.co.uk@localhost>]

On Tue, Dec 15, 2009 at 02:46:59PM +0100, Markus W Kilbinger wrote:
> Hi!
> 
> After/with recent
> 
>   cvs rdiff -u -r1.124 -r1.125 src/sys/kern/sys_pipe.c
> 
>   http://mail-index.netbsd.org/source-changes/2009/12/13/msg004313.html
> 
> Nearly every unpacking of gzipped archives fails like:
> 
>   ===> Extracting for hal-info-20091130
>   gzcat: error writing to output: No such file or directory
>   gzcat: /usr/u/NetBSD/HEAD/pkgsrc/distfiles//hal-info-20091130.tar.gz:
>   uncompress failed
>   tar: End of archive volume 1 reached
>   tar: Unexpected EOF on archive file
>   *** Error code 1
> 
> Reverting this sys_pipe.c change makes all this working again.
> 
> Does anybody see this?

Might be worth checking if it is a problem on the read side or write side.
(comment out the code that returns ERESTART).

ERESTART from there for a write should end up with the write() system call
returning a partial transfer. This is technically valid - but maybe not
allowed for. So would lead to missing data.

I'll think further ....

        David

-- 
David Laight: david%l8s.co.uk@localhost