[libvirt] [PATCHv5 03/23] blockjob: add virsh blockpull --wait

[Jiri Denemark]

On Mon, Apr 16, 2012 at 23:05:54 -0600, Eric Blake wrote:
> I'm tired of shell-scripting to wait for completion of a block pull,
> when virsh can be taught to do the same.  I couldn't quite reuse
> vshWatchJob, as this is not a case of a long-running command where
> a second thread must be used to probe job status (at least, not unless
> I make virsh start doing blocking waits for an event to fire), but it
> served as inspiration for my simpler single-threaded loop.  There is
> up to a half-second delay between sending SIGINT and the job being
> aborted, but I didn't think it worth the complexity of a second thread
> and use of poll() just to minimize that delay.
> 
> * tools/virsh.c (cmdBlockPull): Add new options to wait for
> completion.
> (blockJobImpl): Add argument.
> (cmdBlockJob): Adjust caller.
> * tools/virsh.pod (blockjob): Document new mode.
> ---
> 
> was independent patch previously
> v5: address review comments, add an --async flag
> 
>  tools/virsh.c   |  120 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  tools/virsh.pod |   14 +++++-
>  2 files changed, 127 insertions(+), 7 deletions(-)

Looks good and .5-second delay is a big issue. And if it is, we can improve
the implementation in the future. ACK, this can be pushed independently as
well.

Jirka