You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
222 lines
8.4 KiB
222 lines
8.4 KiB
import array
|
|
import os
|
|
import struct
|
|
import sys
|
|
import threading
|
|
import unittest
|
|
from test import support
|
|
from test.support import os_helper, threading_helper
|
|
from test.support.import_helper import import_module
|
|
fcntl = import_module('fcntl')
|
|
termios = import_module('termios')
|
|
|
|
class IoctlTestsTty(unittest.TestCase):
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
TIOCGPGRP = support.get_attribute(termios, 'TIOCGPGRP')
|
|
try:
|
|
tty = open("/dev/tty", "rb")
|
|
except OSError:
|
|
raise unittest.SkipTest("Unable to open /dev/tty")
|
|
with tty:
|
|
# Skip if another process is in foreground
|
|
r = fcntl.ioctl(tty, TIOCGPGRP, struct.pack("i", 0))
|
|
rpgrp = struct.unpack("i", r)[0]
|
|
if rpgrp not in (os.getpgrp(), os.getsid(0)):
|
|
raise unittest.SkipTest("Neither the process group nor the session "
|
|
"are attached to /dev/tty")
|
|
|
|
def test_ioctl_immutable_buf(self):
|
|
# If this process has been put into the background, TIOCGPGRP returns
|
|
# the session ID instead of the process group id.
|
|
ids = (os.getpgrp(), os.getsid(0))
|
|
with open("/dev/tty", "rb") as tty:
|
|
# string
|
|
buf = " "*8
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf)
|
|
self.assertIsInstance(r, bytes)
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
# bytes
|
|
buf = b" "*8
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf)
|
|
self.assertIsInstance(r, bytes)
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
# read-only buffer
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, memoryview(buf))
|
|
self.assertIsInstance(r, bytes)
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
def test_ioctl_mutable_buf(self):
|
|
ids = (os.getpgrp(), os.getsid(0))
|
|
with open("/dev/tty", "rb") as tty:
|
|
buf = bytearray(b" "*8)
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf)
|
|
self.assertEqual(r, 0)
|
|
rpgrp = memoryview(buf).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
def test_ioctl_no_mutate_buf(self):
|
|
ids = (os.getpgrp(), os.getsid(0))
|
|
with open("/dev/tty", "rb") as tty:
|
|
buf = bytearray(b" "*8)
|
|
save_buf = bytes(buf)
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf, False)
|
|
self.assertEqual(bytes(buf), save_buf)
|
|
self.assertIsInstance(r, bytes)
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
def _create_int_buf(self, nbytes=None):
|
|
buf = array.array('i')
|
|
intsize = buf.itemsize
|
|
# A fill value unlikely to be in `ids`
|
|
fill = -12345
|
|
if nbytes is not None:
|
|
# Extend the buffer so that it is exactly `nbytes` bytes long
|
|
buf.extend([fill] * (nbytes // intsize))
|
|
self.assertEqual(len(buf) * intsize, nbytes) # sanity check
|
|
else:
|
|
buf.append(fill)
|
|
return buf
|
|
|
|
def _check_ioctl_mutate_len(self, nbytes=None):
|
|
ids = (os.getpgrp(), os.getsid(0))
|
|
buf = self._create_int_buf(nbytes)
|
|
with open("/dev/tty", "rb") as tty:
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf)
|
|
rpgrp = buf[0]
|
|
self.assertEqual(r, 0)
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
def _check_ioctl_not_mutate_len(self, nbytes=None):
|
|
ids = (os.getpgrp(), os.getsid(0))
|
|
buf = self._create_int_buf(nbytes)
|
|
save_buf = bytes(buf)
|
|
with open("/dev/tty", "rb") as tty:
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf, False)
|
|
self.assertIsInstance(r, bytes)
|
|
self.assertEqual(len(r), len(save_buf))
|
|
self.assertEqual(bytes(buf), save_buf)
|
|
rpgrp = array.array('i', r)[0]
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
buf = bytes(buf)
|
|
with open("/dev/tty", "rb") as tty:
|
|
r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf, True)
|
|
self.assertIsInstance(r, bytes)
|
|
self.assertEqual(len(r), len(save_buf))
|
|
self.assertEqual(buf, save_buf)
|
|
rpgrp = array.array('i', r)[0]
|
|
rpgrp = memoryview(r).cast('i')[0]
|
|
self.assertIn(rpgrp, ids)
|
|
|
|
def test_ioctl_mutate(self):
|
|
self._check_ioctl_mutate_len()
|
|
self._check_ioctl_not_mutate_len()
|
|
|
|
def test_ioctl_mutate_1024(self):
|
|
# Issue #9758: a mutable buffer of exactly 1024 bytes wouldn't be
|
|
# copied back after the system call.
|
|
self._check_ioctl_mutate_len(1024)
|
|
self._check_ioctl_not_mutate_len(1024)
|
|
|
|
def test_ioctl_mutate_2048(self):
|
|
# Test with a larger buffer, just for the record.
|
|
self._check_ioctl_mutate_len(2048)
|
|
self.assertRaises(ValueError, self._check_ioctl_not_mutate_len, 2048)
|
|
|
|
|
|
@unittest.skipUnless(hasattr(os, 'openpty'), "need os.openpty()")
|
|
class IoctlTestsPty(unittest.TestCase):
|
|
def setUp(self):
|
|
self.master_fd, self.slave_fd = os.openpty()
|
|
self.addCleanup(os.close, self.slave_fd)
|
|
self.addCleanup(os.close, self.master_fd)
|
|
|
|
@unittest.skipUnless(hasattr(termios, 'TCFLSH'), 'requires termios.TCFLSH')
|
|
def test_ioctl_clear_input_or_output(self):
|
|
wfd = self.slave_fd
|
|
rfd = self.master_fd
|
|
# The data is buffered in the input buffer on Linux, and in
|
|
# the output buffer on other platforms.
|
|
inbuf = sys.platform in ('linux', 'android')
|
|
|
|
os.write(wfd, b'abcdef')
|
|
self.assertEqual(os.read(rfd, 2), b'ab')
|
|
if inbuf:
|
|
# don't flush input
|
|
fcntl.ioctl(rfd, termios.TCFLSH, termios.TCOFLUSH)
|
|
else:
|
|
# don't flush output
|
|
fcntl.ioctl(wfd, termios.TCFLSH, termios.TCIFLUSH)
|
|
self.assertEqual(os.read(rfd, 2), b'cd')
|
|
if inbuf:
|
|
# flush input
|
|
fcntl.ioctl(rfd, termios.TCFLSH, termios.TCIFLUSH)
|
|
else:
|
|
# flush output
|
|
fcntl.ioctl(wfd, termios.TCFLSH, termios.TCOFLUSH)
|
|
os.write(wfd, b'ABCDEF')
|
|
self.assertEqual(os.read(rfd, 1024), b'ABCDEF')
|
|
|
|
@unittest.skipUnless(sys.platform == 'linux', 'only works on Linux')
|
|
@unittest.skipUnless(hasattr(termios, 'TCXONC'), 'requires termios.TCXONC')
|
|
def test_ioctl_suspend_and_resume_output(self):
|
|
wfd = self.slave_fd
|
|
rfd = self.master_fd
|
|
write_suspended = threading.Event()
|
|
write_finished = threading.Event()
|
|
|
|
def writer():
|
|
os.write(wfd, b'abc')
|
|
self.assertTrue(write_suspended.wait(support.SHORT_TIMEOUT))
|
|
os.write(wfd, b'def')
|
|
write_finished.set()
|
|
|
|
with threading_helper.start_threads([threading.Thread(target=writer)]):
|
|
self.assertEqual(os.read(rfd, 3), b'abc')
|
|
try:
|
|
try:
|
|
fcntl.ioctl(wfd, termios.TCXONC, termios.TCOOFF)
|
|
finally:
|
|
write_suspended.set()
|
|
self.assertFalse(write_finished.wait(0.5),
|
|
'output was not suspended')
|
|
finally:
|
|
fcntl.ioctl(wfd, termios.TCXONC, termios.TCOON)
|
|
self.assertTrue(write_finished.wait(support.SHORT_TIMEOUT),
|
|
'output was not resumed')
|
|
self.assertEqual(os.read(rfd, 1024), b'def')
|
|
|
|
def test_ioctl_signed_unsigned_code_param(self):
|
|
if termios.TIOCSWINSZ < 0:
|
|
set_winsz_opcode_maybe_neg = termios.TIOCSWINSZ
|
|
set_winsz_opcode_pos = termios.TIOCSWINSZ & 0xffffffff
|
|
else:
|
|
set_winsz_opcode_pos = termios.TIOCSWINSZ
|
|
set_winsz_opcode_maybe_neg, = struct.unpack("i",
|
|
struct.pack("I", termios.TIOCSWINSZ))
|
|
|
|
our_winsz = struct.pack("HHHH",80,25,0,0)
|
|
# test both with a positive and potentially negative ioctl code
|
|
new_winsz = fcntl.ioctl(self.master_fd, set_winsz_opcode_pos, our_winsz)
|
|
new_winsz = fcntl.ioctl(self.master_fd, set_winsz_opcode_maybe_neg, our_winsz)
|
|
|
|
@unittest.skipUnless(hasattr(fcntl, 'FICLONE'), 'need fcntl.FICLONE')
|
|
def test_bad_fd(self):
|
|
# gh-134744: Test error handling
|
|
fd = os_helper.make_bad_fd()
|
|
with self.assertRaises(OSError):
|
|
fcntl.ioctl(fd, fcntl.FICLONE, fd)
|
|
with self.assertRaises(OSError):
|
|
fcntl.ioctl(fd, fcntl.FICLONE, b'\0' * 1024)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|
|
|