1 files changed, 93 insertions, 0 deletions
diff --git a/src/python/stdlib/test/test_ioctl.py b/src/python/stdlib/test/test_ioctl.py
new file mode 100644
index 0000000..ae965d8
--- /dev/null
+++ b/src/python/stdlib/test/test_ioctl.py
@@ -0,0 +1,93 @@
+import array
+import unittest
+from test.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", "r")
+except IOError:
+    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))
+        tty = open("/dev/tty", "r")
+        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", "r") 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 & 0xffffffffL
+            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)
+
+def test_main():
+    run_unittest(IoctlTests)
+
+if __name__ == "__main__":
+    test_main()