Kill subprocesses on KeyboardInterrupt.

gclient.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Meta checkout manager supporting both Subversion and GIT.
 
 Files
   .gclient      : Current client configuration, written by 'config' command.
                   Format is a Python script defining 'solutions', a list whose
@@ skipping 1759 matching lines @@
     parser = Parser()
     if argv:
       command = Command(argv[0])
       if command:
         # 'fix' the usage and the description now that we know the subcommand.
         GenUsage(parser, argv[0])
         return command(parser, argv[1:])
     # Not a known command. Default to help.
     GenUsage(parser, 'help')
     return CMDhelp(parser, argv)
+  except KeyboardInterrupt:
+    gclient_utils.GClientChildren.KillAllRemainingChildren()
+    raise
   except (gclient_utils.Error, subprocess2.CalledProcessError), e:
     print >> sys.stderr, 'Error: %s' % str(e)
     return 1
 
 
 if '__main__' == __name__:
   fix_encoding.fix_encoding()
   sys.exit(Main(sys.argv[1:]))
 
 # vim: ts=2:sw=2:tw=80:et: