VM: Use -serial none in no-graphics kvm mode...

bin/cros_run_parallel_vm_tests.py

 #!/usr/bin/python
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Runs tests on VMs in parallel."""
 
 import optparse
 import os
 import subprocess
@@ skipping 46 matching lines @@
     Runs all tests in |self._tests|. Each test is executed on a separate VM.
 
     Returns:
       A list of test process info objects containing the following dictionary
       entries:
         'test': the test name;
         'proc': the Popen process instance for this test run.
     """
     ssh_port = self._base_ssh_port
     spawned_tests = []
-    # Test runs shouldn't need anything from stdin. However, it seems that
-    # running with stdin leaves the terminal in a bad state so redirect from
-    # /dev/null.
-    dev_null = open('/dev/null')
     for test in self._tests:
       args = [ os.path.join(os.path.dirname(__file__), 'cros_run_vm_test'),
                '--snapshot',  # The image is shared so don't modify it.
                '--no_graphics',
                '--ssh_port=%d' % ssh_port,
                '--test_case=%s' % test ]
       if self._board: args.append('--board=%s' % self._board)
       if self._image_path: args.append('--image_path=%s' % self._image_path)
       if self._results_dir_root:
         args.append('--results_dir_root=%s/%s.%d' %
                     (self._results_dir_root, test, ssh_port))
       Info('Running %r...' % args)
       output = None
       if self._order_output:
         output = tempfile.NamedTemporaryFile(prefix='parallel_vm_test_')
         Info('Piping output to %s.' % output.name)
-      proc = subprocess.Popen(args, stdin=dev_null, stdout=output,
-                              stderr=output)
+      proc = subprocess.Popen(args, stdout=output, stderr=output)
       test_info = { 'test': test,
                     'proc': proc,
                     'output': output }
       spawned_tests.append(test_info)
       ssh_port = ssh_port + 1
     return spawned_tests
 
   def _WaitForCompletion(self, spawned_tests):
     """Waits for tests to complete and returns a list of failed tests.
 
@@ skipping 55 matching lines @@
     Die('no tests provided')
 
   runner = ParallelTestRunner(args, options.base_ssh_port, options.board,
                               options.image_path, options.order_output,
                               options.results_dir_root)
   runner.Run()
 
 
 if __name__ == '__main__':
   main()