Author: James Spencer
Revision Date: 2011-07-27 15:24:31 UTC

Ensure only one instance of byobu-statusd is running.

The exec killall command in the common profile didn't work on my systems (Arch
Linux and Ubuntu 10.04). The error message indicated that this might be
because a screen window hadn't been initialised by the time the exec command was run.

A different approach to this problem is to have byobu-statusd exit immediately if
an instance of byobu-statusd is already running.