[libvirt] [PATCH 3/3]: Read cmd stdout + stderr in virRun

[Daniel P. Berrange]

On Mon, Nov 03, 2008 at 02:54:23PM -0500, Cole Robinson wrote:
> Daniel P. Berrange wrote:
> > On Thu, Oct 30, 2008 at 02:06:35PM -0400, Cole Robinson wrote:
> >   
> >> The attached patch is my second cut at reading 
> >> stdout and stderr of the command virRun kicks
> >> off. There is no hard limit to the amount of
> >> data we read now, and we use a poll loop to
> >> avoid any possible full buffer issues.
> >>
> >> If stdout or stderr had any content, we DEBUG
> >> it, and if the command appears to fail we
> >> return stderr in the error message. So now,
> >> trying to stop a logical pool with active
> >> volumes will return:
> >>
> >> $ sudo virsh pool-destroy vgdata
> >> libvir: error : internal error '/sbin/vgchange -an vgdata' exited with non-zero status 5 and signal 0:   Can't deactivate volume group "vgdata" with 2 open logical volume(s)
> >> error: Failed to destroy pool vgdata
> >>     
> 
> <snip>
> 
> > I think it'd be nice to move the I/O processing loop out  of the
> > virRun() function and into a separate helper functiion along the
> > lines of 
> >
> >    virPipeReadUntilEOF(int outfd, int errfd, char **outbuf, char **errbuf)
> >
> > Daniel
> >   
> 
> 
> Okay, updated patch attached. Also addresses the point Jim
> raised about poll.h

ACK, this version looks good to me.

Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|