Re: [libvirt] [PATCH 2/2] [TCK] nwfilter: Add test cases for ipset

On 04/27/2012 05:12 AM, Stefan Berger wrote: Using '2>&1 1>/dev/null' says: start with stdout (1) and stderr (2) inherited from the parent change fd 2 to be copied from the current fd 1 (the parents stdout) change fd 1 to be /dev/null now the child discards output, and sends errors into the parent's stdout Using '2>/dev/null 1>/dev/null' says: start with stdout and stderr inherited from the parent change fd 2 to be /dev/null change fd 1 to be /dev/null now the child discards everything Swapping the order, and using '>/dev/null 2>&1' says: start with stdout (1) and stderr (2) inherited from the parent change fd 1 to be /dev/null change fd 2 to be copied from the current fd 1 (/dev/null) now the child discards everything In other words, all you did wrong was forgetting that redirections are honored left-to-right. Yep, on my list to review. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org