It is possible for a CmdError to be raised with an exit_status of
None, if the command times out and cannot be SIGTERMed or SIGKILLed.
The CmdError.__str__ method needs to be able to handle that case.

Risk: Low
Visibility: If a command times out and can't be SIGKILLed, we should
still be able to str the resulting CmdError.

Signed-off-by: John Admanski <jadmanski@google.com>



git-svn-id: http://test.kernel.org/svn/autotest/trunk@2212 592f7852-d20e-0410-864c-8624ca9c26a4
3 files changed