On 02/15/2010 06:11 AM, Daniel P. Berrange wrote:
On Fri, Feb 12, 2010 at 10:32:17AM -0500, Cole Robinson wrote:
This ugly thing is a shell script to detect availability of the -q option for 'nc': debian and suse based distros need this flag to ensure the remote nc will exit on EOF, so it will go away when we close the tunnel. If it doesn't go away, a useless 'nc' process is left sitting on the remote host.
Fedora's 'nc' doesn't have this option, so we can't blindly pass -q. More info here:
I don't really like this approach. Shouldn't it be sufficient to just explicit SIGKILL the ssh client, rather than relying on the exit-on-EOF behaviour of nc.
kill() helps prevent virt-manager from hanging, but it doesn't address the dangling 'nc' process on the remote host that requires -q. Every connection will leave an 'nc' process hanging. - Cole