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# Copyright 1998-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: test_spawn.py 8474 2007-11-09 03:35:38Z zmedico $
import errno, os, sys
import fcntl
import termios
import portage
from portage.output import get_term_size, set_term_size
from portage.tests import TestCase
from _emerge import PipeReader, SpawnProcess, TaskScheduler
class PipeReaderTestCase(TestCase):
def _create_pipe(self):
return os.pipe()
def _assertEqual(self, test_string, consumer_value):
self.assertEqual(test_string, consumer_value)
def testPipeReader(self):
"""
Use a poll loop to read data from a pipe and assert that
the data written to the pipe is identical to the data
read from the pipe.
"""
test_string = 2 * "blah blah blah\n"
master_fd, slave_fd = self._create_pipe()
master_file = os.fdopen(master_fd, 'r')
task_scheduler = TaskScheduler(max_jobs=2)
scheduler = task_scheduler.sched_iface
producer = SpawnProcess(
args=["bash", "-c", "echo -n '%s'" % test_string],
fd_pipes={1:slave_fd}, scheduler=scheduler)
consumer = PipeReader(
input_files={"producer" : master_file},
scheduler=scheduler)
task_scheduler.add(producer)
task_scheduler.add(consumer)
def producer_start_cb(task):
os.close(slave_fd)
producer.addStartListener(producer_start_cb)
task_scheduler.run()
self._assertEqual(test_string, consumer.getvalue())
class PtyReaderTestCase(PipeReaderTestCase):
def _assertEqual(self, test_string, consumer_value):
if test_string != consumer_value:
# This test is expected to fail on some operating systems
# such as Darwin that do not support poll() on pty devices.
self.todo = True
self.assertEqual(test_string, consumer_value)
def _create_pipe(self):
got_pty = False
if portage._disable_openpty:
master_fd, slave_fd = os.pipe()
else:
from pty import openpty
try:
master_fd, slave_fd = openpty()
got_pty = True
except EnvironmentError, e:
portage._disable_openpty = True
portage.writemsg("openpty failed: '%s'\n" % str(e),
noiselevel=-1)
del e
master_fd, slave_fd = os.pipe()
if got_pty:
# Disable post-processing of output since otherwise weird
# things like \n -> \r\n transformations may occur.
mode = termios.tcgetattr(slave_fd)
mode[1] &= ~termios.OPOST
termios.tcsetattr(slave_fd, termios.TCSANOW, mode)
if got_pty and sys.stdout.isatty():
rows, columns = get_term_size()
set_term_size(rows, columns, slave_fd)
return (master_fd, slave_fd)
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