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345 lines
13 KiB
Python
345 lines
13 KiB
Python
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import fcntl
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import os
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import stat
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import sys
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import time
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import tempfile
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import unittest2
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import mitogen.core
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import mitogen.parent
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from mitogen.core import b
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import testlib
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def _osx_mode(n):
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"""
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fstat(2) on UNIX sockets on OSX return different mode bits depending on
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which side is being inspected, so zero those bits for comparison.
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"""
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if sys.platform == 'darwin':
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n &= ~int('0777', 8)
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return n
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def run_fd_check(func, fd, mode, on_start=None):
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"""
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Run ``tests/data/fd_check.py`` using `func`. The subprocess writes
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information about the `fd` it received to a temporary file.
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:param func:
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Function like `create_child()` used to start child.
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:param fd:
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FD child should read/write from, and report information about.
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:param mode:
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"read" or "write", depending on whether the FD is readable or writeable
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from the perspective of the child. If "read", `on_start()` should write
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"TEST" to it and the child reads "TEST" from it, otherwise `on_start()`
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should read "TEST" from it and the child writes "TEST" to it.
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:param on_start:
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Function invoked as `on_start(proc)`
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:returns:
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Tuple of `(proc, info, on_start_result)`, where:
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* `proc`: the :class:`mitogen.parent.Process` returned by `func`.
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* `info`: dict containing information returned by the child:
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* `buf`: "TEST" that was read in "read" mode
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* `flags`: :attr:`fcntl.F_GETFL` flags for `fd`
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* `st_mode`: st_mode field from :func:`os.fstat`
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* `st_dev`: st_dev field from :func:`os.fstat`
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* `st_ino`: st_ino field from :func:`os.fstat`
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* `ttyname`: :func:`os.ttyname` invoked on `fd`.
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* `controlling_tty`: :func:os.ttyname` invoked on ``/dev/tty``
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from within the child.
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"""
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tf = tempfile.NamedTemporaryFile()
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args = [
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sys.executable,
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testlib.data_path('fd_check.py'),
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tf.name,
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str(fd),
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mode,
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]
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proc = func(args=args)
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os = None
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if on_start:
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os = on_start(proc)
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proc.proc.wait()
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try:
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return proc, eval(tf.read()), os
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finally:
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tf.close()
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def close_proc(proc):
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proc.stdin.close()
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proc.stdout.close()
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if proc.stderr:
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proc.stderr.close()
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def wait_read(fp, n):
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poller = mitogen.core.Poller()
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try:
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poller.start_receive(fp.fileno())
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for _ in poller.poll():
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return os.read(fp.fileno(), n)
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assert False
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finally:
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poller.close()
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class StdinSockMixin(object):
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def test_stdin(self):
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proc, info, _ = run_fd_check(self.func, 0, 'read',
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lambda proc: proc.stdin.send(b('TEST')))
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st = os.fstat(proc.stdin.fileno())
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self.assertTrue(stat.S_ISSOCK(st.st_mode))
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, _osx_mode(info['st_mode']))
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flags = fcntl.fcntl(proc.stdin.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(info['buf'], 'TEST')
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self.assertTrue(info['flags'] & os.O_RDWR)
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class StdoutSockMixin(object):
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def test_stdout(self):
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proc, info, buf = run_fd_check(self.func, 1, 'write',
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lambda proc: wait_read(proc.stdout, 4))
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st = os.fstat(proc.stdout.fileno())
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self.assertTrue(stat.S_ISSOCK(st.st_mode))
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, _osx_mode(info['st_mode']))
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flags = fcntl.fcntl(proc.stdout.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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self.assertTrue(info['flags'] & os.O_RDWR)
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class CreateChildTest(StdinSockMixin, StdoutSockMixin, testlib.TestCase):
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func = staticmethod(mitogen.parent.create_child)
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def test_stderr(self):
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proc, info, _ = run_fd_check(self.func, 2, 'write')
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st = os.fstat(sys.stderr.fileno())
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, info['st_mode'])
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self.assertEquals(st.st_ino, info['st_ino'])
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class CreateChildMergedTest(StdinSockMixin, StdoutSockMixin,
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testlib.TestCase):
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def func(self, *args, **kwargs):
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kwargs['merge_stdio'] = True
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return mitogen.parent.create_child(*args, **kwargs)
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def test_stderr(self):
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proc, info, buf = run_fd_check(self.func, 2, 'write',
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lambda proc: wait_read(proc.stdout, 4))
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self.assertEquals(None, proc.stderr)
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st = os.fstat(proc.stdout.fileno())
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self.assertTrue(stat.S_ISSOCK(st.st_mode))
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flags = fcntl.fcntl(proc.stdout.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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self.assertTrue(info['flags'] & os.O_RDWR)
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class CreateChildStderrPipeTest(StdinSockMixin, StdoutSockMixin,
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testlib.TestCase):
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def func(self, *args, **kwargs):
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kwargs['stderr_pipe'] = True
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return mitogen.parent.create_child(*args, **kwargs)
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def test_stderr(self):
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proc, info, buf = run_fd_check(self.func, 2, 'write',
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lambda proc: wait_read(proc.stderr, 4))
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st = os.fstat(proc.stderr.fileno())
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self.assertTrue(stat.S_ISFIFO(st.st_mode))
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, info['st_mode'])
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flags = fcntl.fcntl(proc.stderr.fileno(), fcntl.F_GETFL)
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self.assertFalse(flags & os.O_WRONLY)
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self.assertFalse(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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self.assertTrue(info['flags'] & os.O_WRONLY)
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class TtyCreateChildTest(testlib.TestCase):
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func = staticmethod(mitogen.parent.tty_create_child)
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def test_dev_tty_open_succeeds(self):
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# In the early days of UNIX, a process that lacked a controlling TTY
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# would acquire one simply by opening an existing TTY. Linux and OS X
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# continue to follow this behaviour, however at least FreeBSD moved to
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# requiring an explicit ioctl(). Linux supports it, but we don't yet
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# use it there and anyway the behaviour will never change, so no point
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# in fixing things that aren't broken. Below we test that
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# getpass-loving apps like sudo and ssh get our slave PTY when they
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# attempt to open /dev/tty, which is what they both do on attempting to
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# read a password.
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tf = tempfile.NamedTemporaryFile()
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try:
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proc = self.func([
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'bash', '-c', 'exec 2>%s; echo hi > /dev/tty' % (tf.name,)
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])
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mitogen.core.set_block(proc.stdin.fileno())
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# read(3) below due to https://bugs.python.org/issue37696
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self.assertEquals(mitogen.core.b('hi\n'), proc.stdin.read(3))
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waited_pid, status = os.waitpid(proc.pid, 0)
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self.assertEquals(proc.pid, waited_pid)
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self.assertEquals(0, status)
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self.assertEquals(mitogen.core.b(''), tf.read())
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proc.stdout.close()
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finally:
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tf.close()
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def test_stdin(self):
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proc, info, _ = run_fd_check(self.func, 0, 'read',
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lambda proc: proc.stdin.write(b('TEST')))
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st = os.fstat(proc.stdin.fileno())
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self.assertTrue(stat.S_ISCHR(st.st_mode))
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self.assertTrue(stat.S_ISCHR(info['st_mode']))
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self.assertTrue(isinstance(info['ttyname'],
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mitogen.core.UnicodeType))
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self.assertTrue(os.isatty(proc.stdin.fileno()))
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flags = fcntl.fcntl(proc.stdin.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(info['flags'] & os.O_RDWR)
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self.assertTrue(info['buf'], 'TEST')
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def test_stdout(self):
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proc, info, buf = run_fd_check(self.func, 1, 'write',
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lambda proc: wait_read(proc.stdout, 4))
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st = os.fstat(proc.stdout.fileno())
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self.assertTrue(stat.S_ISCHR(st.st_mode))
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self.assertTrue(stat.S_ISCHR(info['st_mode']))
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self.assertTrue(isinstance(info['ttyname'],
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mitogen.core.UnicodeType))
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self.assertTrue(os.isatty(proc.stdout.fileno()))
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flags = fcntl.fcntl(proc.stdout.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(info['flags'] & os.O_RDWR)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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def test_stderr(self):
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# proc.stderr is None in the parent since there is no separate stderr
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# stream. In the child, FD 2/stderr is connected to the TTY.
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proc, info, buf = run_fd_check(self.func, 2, 'write',
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lambda proc: wait_read(proc.stdout, 4))
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st = os.fstat(proc.stdout.fileno())
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self.assertTrue(stat.S_ISCHR(st.st_mode))
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self.assertTrue(stat.S_ISCHR(info['st_mode']))
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self.assertTrue(isinstance(info['ttyname'],
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mitogen.core.UnicodeType))
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self.assertTrue(os.isatty(proc.stdout.fileno()))
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flags = fcntl.fcntl(proc.stdout.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(info['flags'] & os.O_RDWR)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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def test_dev_tty_open_succeeds(self):
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# In the early days of UNIX, a process that lacked a controlling TTY
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# would acquire one simply by opening an existing TTY. Linux and OS X
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# continue to follow this behaviour, however at least FreeBSD moved to
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# requiring an explicit ioctl(). Linux supports it, but we don't yet
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# use it there and anyway the behaviour will never change, so no point
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# in fixing things that aren't broken. Below we test that
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# getpass-loving apps like sudo and ssh get our slave PTY when they
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# attempt to open /dev/tty, which is what they both do on attempting to
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# read a password.
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tf = tempfile.NamedTemporaryFile()
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try:
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proc = self.func([
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'bash', '-c', 'exec 2>%s; echo hi > /dev/tty' % (tf.name,)
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])
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self.assertEquals(mitogen.core.b('hi\n'), wait_read(proc.stdout, 3))
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waited_pid, status = os.waitpid(proc.pid, 0)
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self.assertEquals(proc.pid, waited_pid)
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self.assertEquals(0, status)
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self.assertEquals(mitogen.core.b(''), tf.read())
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proc.stdout.close()
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finally:
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tf.close()
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class StderrDiagTtyMixin(object):
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def test_stderr(self):
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# proc.stderr is the PTY master, FD 2 in the child is the PTY slave
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proc, info, buf = run_fd_check(self.func, 2, 'write',
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lambda proc: wait_read(proc.stderr, 4))
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st = os.fstat(proc.stderr.fileno())
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self.assertTrue(stat.S_ISCHR(st.st_mode))
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self.assertTrue(stat.S_ISCHR(info['st_mode']))
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self.assertTrue(isinstance(info['ttyname'],
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mitogen.core.UnicodeType))
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self.assertTrue(os.isatty(proc.stderr.fileno()))
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flags = fcntl.fcntl(proc.stderr.fileno(), fcntl.F_GETFL)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(info['flags'] & os.O_RDWR)
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self.assertTrue(flags & os.O_RDWR)
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self.assertTrue(buf, 'TEST')
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class HybridTtyCreateChildTest(StdinSockMixin, StdoutSockMixin,
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StderrDiagTtyMixin, testlib.TestCase):
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func = staticmethod(mitogen.parent.hybrid_tty_create_child)
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if 0:
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# issue #410
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class SelinuxHybridTtyCreateChildTest(StderrDiagTtyMixin, testlib.TestCase):
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func = staticmethod(mitogen.parent.selinux_hybrid_tty_create_child)
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def test_stdin(self):
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proc, info, buf = run_fd_check(self.func, 0, 'read',
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lambda proc: proc.transmit_side.write('TEST'))
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st = os.fstat(proc.transmit_side.fd)
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self.assertTrue(stat.S_ISFIFO(st.st_mode))
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, info['st_mode'])
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flags = fcntl.fcntl(proc.transmit_side.fd, fcntl.F_GETFL)
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self.assertTrue(flags & os.O_WRONLY)
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self.assertTrue(buf, 'TEST')
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self.assertFalse(info['flags'] & os.O_WRONLY)
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self.assertFalse(info['flags'] & os.O_RDWR)
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def test_stdout(self):
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proc, info, buf = run_fd_check(self.func, 1, 'write',
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lambda proc: wait_read(proc.receive_side, 4))
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st = os.fstat(proc.receive_side.fd)
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self.assertTrue(stat.S_ISFIFO(st.st_mode))
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self.assertEquals(st.st_dev, info['st_dev'])
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self.assertEquals(st.st_mode, info['st_mode'])
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flags = fcntl.fcntl(proc.receive_side.fd, fcntl.F_GETFL)
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self.assertFalse(flags & os.O_WRONLY)
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self.assertFalse(flags & os.O_RDWR)
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self.assertTrue(info['flags'] & os.O_WRONLY)
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self.assertTrue(buf, 'TEST')
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if __name__ == '__main__':
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unittest2.main()
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