[molecule] kill all running children pids on exit

molecule.py

@@ -17,12 +17,19 @@
 #    along with this program; if not, write to the Free Software
 #    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+import os
+import signal
 import sys
 sys.path.insert(0,'/usr/lib/molecule/')
 sys.path.insert(0,'molecule/')
 sys.path.insert(0,'.')
 import molecule.cmdline
 from molecule.handlers import Runner
+from molecule.utils import RUNNING_PIDS
+
+def kill_pids():
+    for pid in RUNNING_PIDS:
+        os.kill(pid, signal.SIGTERM)
 
 molecule_data, molecule_data_order = molecule.cmdline.parse()
 if not molecule_data_order:
@@ -35,8 +42,10 @@ for el in molecule_data_order:
         rc = my.run()
     except KeyboardInterrupt:
         my.kill()
+        kill_pids()
         raise SystemExit(1)
     my.kill()
+    kill_pids()
     if rc != 0:
         raise SystemExit(rc)
 raise SystemExit(0)

molecule/utils.py

@@ -24,6 +24,8 @@ import time
 import subprocess
 import shutil
 
+RUNNING_PIDS = set()
+
 def get_year():
     return time.strftime("%Y")
 
@@ -58,7 +60,9 @@ def exec_chroot_cmd(args, chroot, pre_chroot = []):
         rc = subprocess.call(myargs)
         os._exit(rc)
     else:
+        RUNNING_PIDS.add(pid)
         rcpid, rc = os.waitpid(pid,0)
+        RUNNING_PIDS.discard(pid)
         return rc
 
 def empty_dir(dest_dir):