140 lines
5.0 KiB
Python
140 lines
5.0 KiB
Python
"""Test program for the fcntl C module.
|
|
"""
|
|
import platform
|
|
import os
|
|
import struct
|
|
import sys
|
|
import _testcapi
|
|
import unittest
|
|
from test.support import verbose, TESTFN, unlink, run_unittest, import_module
|
|
|
|
# Skip test if no fcntl module.
|
|
fcntl = import_module('fcntl')
|
|
|
|
|
|
# TODO - Write tests for flock() and lockf().
|
|
|
|
def get_lockdata():
|
|
try:
|
|
os.O_LARGEFILE
|
|
except AttributeError:
|
|
start_len = "ll"
|
|
else:
|
|
start_len = "qq"
|
|
|
|
if (sys.platform.startswith(('netbsd', 'freebsd', 'openbsd', 'bsdos'))
|
|
or sys.platform == 'darwin'):
|
|
if struct.calcsize('l') == 8:
|
|
off_t = 'l'
|
|
pid_t = 'i'
|
|
else:
|
|
off_t = 'lxxxx'
|
|
pid_t = 'l'
|
|
lockdata = struct.pack(off_t + off_t + pid_t + 'hh', 0, 0, 0,
|
|
fcntl.F_WRLCK, 0)
|
|
elif sys.platform.startswith('gnukfreebsd'):
|
|
lockdata = struct.pack('qqihhi', 0, 0, 0, fcntl.F_WRLCK, 0, 0)
|
|
elif sys.platform in ['aix3', 'aix4', 'hp-uxB', 'unixware7']:
|
|
lockdata = struct.pack('hhlllii', fcntl.F_WRLCK, 0, 0, 0, 0, 0, 0)
|
|
else:
|
|
lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
|
|
if lockdata:
|
|
if verbose:
|
|
print('struct.pack: ', repr(lockdata))
|
|
return lockdata
|
|
|
|
lockdata = get_lockdata()
|
|
|
|
class TestFcntl(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.f = None
|
|
|
|
def tearDown(self):
|
|
if self.f and not self.f.closed:
|
|
self.f.close()
|
|
unlink(TESTFN)
|
|
|
|
def test_fcntl_fileno(self):
|
|
# the example from the library docs
|
|
self.f = open(TESTFN, 'wb')
|
|
rv = fcntl.fcntl(self.f.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
if verbose:
|
|
print('Status from fcntl with O_NONBLOCK: ', rv)
|
|
rv = fcntl.fcntl(self.f.fileno(), fcntl.F_SETLKW, lockdata)
|
|
if verbose:
|
|
print('String from fcntl with F_SETLKW: ', repr(rv))
|
|
self.f.close()
|
|
|
|
def test_fcntl_file_descriptor(self):
|
|
# again, but pass the file rather than numeric descriptor
|
|
self.f = open(TESTFN, 'wb')
|
|
rv = fcntl.fcntl(self.f, fcntl.F_SETFL, os.O_NONBLOCK)
|
|
if verbose:
|
|
print('Status from fcntl with O_NONBLOCK: ', rv)
|
|
rv = fcntl.fcntl(self.f, fcntl.F_SETLKW, lockdata)
|
|
if verbose:
|
|
print('String from fcntl with F_SETLKW: ', repr(rv))
|
|
self.f.close()
|
|
|
|
def test_fcntl_bad_file(self):
|
|
class F:
|
|
def __init__(self, fn):
|
|
self.fn = fn
|
|
def fileno(self):
|
|
return self.fn
|
|
self.assertRaises(ValueError, fcntl.fcntl, -1, fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(ValueError, fcntl.fcntl, F(-1), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(TypeError, fcntl.fcntl, 'spam', fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(TypeError, fcntl.fcntl, F('spam'), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
# Issue 15989
|
|
self.assertRaises(OverflowError, fcntl.fcntl, _testcapi.INT_MAX + 1,
|
|
fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(OverflowError, fcntl.fcntl, F(_testcapi.INT_MAX + 1),
|
|
fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(OverflowError, fcntl.fcntl, _testcapi.INT_MIN - 1,
|
|
fcntl.F_SETFL, os.O_NONBLOCK)
|
|
self.assertRaises(OverflowError, fcntl.fcntl, F(_testcapi.INT_MIN - 1),
|
|
fcntl.F_SETFL, os.O_NONBLOCK)
|
|
|
|
@unittest.skipIf(
|
|
platform.machine().startswith('arm') and platform.system() == 'Linux',
|
|
"ARM Linux returns EINVAL for F_NOTIFY DN_MULTISHOT")
|
|
def test_fcntl_64_bit(self):
|
|
# Issue #1309352: fcntl shouldn't fail when the third arg fits in a
|
|
# C 'long' but not in a C 'int'.
|
|
try:
|
|
cmd = fcntl.F_NOTIFY
|
|
# This flag is larger than 2**31 in 64-bit builds
|
|
flags = fcntl.DN_MULTISHOT
|
|
except AttributeError:
|
|
self.skipTest("F_NOTIFY or DN_MULTISHOT unavailable")
|
|
fd = os.open(os.path.dirname(os.path.abspath(TESTFN)), os.O_RDONLY)
|
|
try:
|
|
fcntl.fcntl(fd, cmd, flags)
|
|
finally:
|
|
os.close(fd)
|
|
|
|
def test_flock(self):
|
|
# Solaris needs readable file for shared lock
|
|
self.f = open(TESTFN, 'wb+')
|
|
fileno = self.f.fileno()
|
|
fcntl.flock(fileno, fcntl.LOCK_SH)
|
|
fcntl.flock(fileno, fcntl.LOCK_UN)
|
|
fcntl.flock(self.f, fcntl.LOCK_SH | fcntl.LOCK_NB)
|
|
fcntl.flock(self.f, fcntl.LOCK_UN)
|
|
fcntl.flock(fileno, fcntl.LOCK_EX)
|
|
fcntl.flock(fileno, fcntl.LOCK_UN)
|
|
|
|
self.assertRaises(ValueError, fcntl.flock, -1, fcntl.LOCK_SH)
|
|
self.assertRaises(TypeError, fcntl.flock, 'spam', fcntl.LOCK_SH)
|
|
self.assertRaises(OverflowError, fcntl.flock, _testcapi.INT_MAX+1,
|
|
fcntl.LOCK_SH)
|
|
|
|
|
|
def test_main():
|
|
run_unittest(TestFcntl)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|