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[3.14] gh-134744: Fix fcntl error handling (#134748) #134795

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Merged
merged 1 commit into from
May 27, 2025
Merged

[3.14] gh-134744: Fix fcntl error handling (#134748) #134795

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11 changes: 10 additions & 1 deletion Lib/test/test_fcntl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@
cpython_only, get_pagesize, is_apple, requires_subprocess, verbose
)
from test.support.import_helper import import_module
from test.support.os_helper import TESTFN, unlink
from test.support.os_helper import TESTFN, unlink, make_bad_fd


# Skip test if no fcntl module.
Expand Down Expand Up @@ -228,6 +228,15 @@ def test_fcntl_f_pipesize(self):
os.close(test_pipe_r)
os.close(test_pipe_w)

@unittest.skipUnless(hasattr(fcntl, 'F_DUPFD'), 'need fcntl.F_DUPFD')
def test_bad_fd(self):
# gh-134744: Test error handling
fd = make_bad_fd()
with self.assertRaises(OSError):
fcntl.fcntl(fd, fcntl.F_DUPFD, 0)
with self.assertRaises(OSError):
fcntl.fcntl(fd, fcntl.F_DUPFD, b'\0' * 1024)


if __name__ == '__main__':
unittest.main()
11 changes: 10 additions & 1 deletion Lib/test/test_ioctl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
import threading
import unittest
from test import support
from test.support import threading_helper
from test.support import os_helper, threading_helper
from test.support.import_helper import import_module
fcntl = import_module('fcntl')
termios = import_module('termios')
Expand Down Expand Up @@ -202,6 +202,15 @@ def test_ioctl_set_window_size(self):
new_winsz = struct.unpack("HHHH", result)
self.assertEqual(new_winsz[:2], (20, 40))

@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()
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