| import array |
| import unittest |
| from test.support import run_unittest, import_module, get_attribute |
| import os, struct |
| fcntl = import_module('fcntl') |
| termios = import_module('termios') |
| get_attribute(termios, 'TIOCGPGRP') #Can't run tests without this feature |
| |
| try: |
| tty = open("/dev/tty", "rb") |
| except OSError: |
| raise unittest.SkipTest("Unable to open /dev/tty") |
| else: |
| # Skip if another process is in foreground |
| r = fcntl.ioctl(tty, termios.TIOCGPGRP, " ") |
| tty.close() |
| 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") |
| del tty, r, rpgrp |
| |
| try: |
| import pty |
| except ImportError: |
| pty = None |
| |
| class IoctlTests(unittest.TestCase): |
| def test_ioctl(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: |
| r = fcntl.ioctl(tty, termios.TIOCGPGRP, " ") |
| rpgrp = struct.unpack("i", r)[0] |
| self.assertIn(rpgrp, ids) |
| |
| def _check_ioctl_mutate_len(self, nbytes=None): |
| buf = array.array('i') |
| intsize = buf.itemsize |
| ids = (os.getpgrp(), os.getsid(0)) |
| # 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) |
| with open("/dev/tty", "rb") as tty: |
| r = fcntl.ioctl(tty, termios.TIOCGPGRP, buf, 1) |
| rpgrp = buf[0] |
| self.assertEqual(r, 0) |
| self.assertIn(rpgrp, ids) |
| |
| def test_ioctl_mutate(self): |
| self._check_ioctl_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) |
| |
| def test_ioctl_mutate_2048(self): |
| # Test with a larger buffer, just for the record. |
| self._check_ioctl_mutate_len(2048) |
| |
| def test_ioctl_signed_unsigned_code_param(self): |
| if not pty: |
| raise unittest.SkipTest('pty module required') |
| mfd, sfd = pty.openpty() |
| try: |
| 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(mfd, set_winsz_opcode_pos, our_winsz) |
| new_winsz = fcntl.ioctl(mfd, set_winsz_opcode_maybe_neg, our_winsz) |
| finally: |
| os.close(mfd) |
| os.close(sfd) |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |