[PATCH 6/7] NetTestCommand: add missing join on interrupt

[Jan Tluka]

While working on graceful kill I noticed that when we call interrupt on
a command then the forked child is left orphaned and the pid_exists() check
always return true and graceful kill timeouts.

Adding join() call after sending the interrupt solves this problem.

Signed-off-by: Jan Tluka 
---
 lnst/Common/NetTestCommand.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lnst/Common/NetTestCommand.py b/lnst/Common/NetTestCommand.py
index f09e402..6573ffd 100644
--- a/lnst/Common/NetTestCommand.py
+++ b/lnst/Common/NetTestCommand.py
@@ -212,6 +212,7 @@ class NetTestCommand:
             else:
                 logging.debug("Interrupting command with id "%s", pid "%d"" % (self._id, self._pid))
             os.killpg(os.getpgid(self._pid), signal.SIGINT)
+            self._process.join()
         self._control_cmd = cmd

def kill(self, cmd):