You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
190 lines
6.2 KiB
Python
190 lines
6.2 KiB
Python
"""Test program for the fcntl C module.
|
|
"""
|
|
import platform
|
|
import os
|
|
import struct
|
|
import sys
|
|
import unittest
|
|
from multiprocessing import Process
|
|
from test.support import (verbose, TESTFN, unlink, run_unittest, import_module,
|
|
cpython_only)
|
|
|
|
# Skip test if no fcntl module.
|
|
fcntl = import_module('fcntl')
|
|
|
|
|
|
|
|
def get_lockdata():
|
|
try:
|
|
os.O_LARGEFILE
|
|
except AttributeError:
|
|
start_len = "ll"
|
|
else:
|
|
start_len = "qq"
|
|
|
|
if (sys.platform.startswith(('netbsd', 'freebsd', 'openbsd'))
|
|
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 BadFile:
|
|
def __init__(self, fn):
|
|
self.fn = fn
|
|
def fileno(self):
|
|
return self.fn
|
|
|
|
def try_lockf_on_other_process_fail(fname, cmd):
|
|
f = open(fname, 'wb+')
|
|
try:
|
|
fcntl.lockf(f, cmd)
|
|
except BlockingIOError:
|
|
pass
|
|
finally:
|
|
f.close()
|
|
|
|
def try_lockf_on_other_process(fname, cmd):
|
|
f = open(fname, 'wb+')
|
|
fcntl.lockf(f, cmd)
|
|
fcntl.lockf(f, fcntl.LOCK_UN)
|
|
f.close()
|
|
|
|
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):
|
|
with self.assertRaises(ValueError):
|
|
fcntl.fcntl(-1, fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(ValueError):
|
|
fcntl.fcntl(BadFile(-1), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(TypeError):
|
|
fcntl.fcntl('spam', fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(TypeError):
|
|
fcntl.fcntl(BadFile('spam'), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
|
|
@cpython_only
|
|
def test_fcntl_bad_file_overflow(self):
|
|
from _testcapi import INT_MAX, INT_MIN
|
|
# Issue 15989
|
|
with self.assertRaises(OverflowError):
|
|
fcntl.fcntl(INT_MAX + 1, fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(OverflowError):
|
|
fcntl.fcntl(BadFile(INT_MAX + 1), fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(OverflowError):
|
|
fcntl.fcntl(INT_MIN - 1, fcntl.F_SETFL, os.O_NONBLOCK)
|
|
with self.assertRaises(OverflowError):
|
|
fcntl.fcntl(BadFile(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)
|
|
|
|
@unittest.skipIf(platform.system() == "AIX", "AIX returns PermissionError")
|
|
def test_lockf_exclusive(self):
|
|
self.f = open(TESTFN, 'wb+')
|
|
cmd = fcntl.LOCK_EX | fcntl.LOCK_NB
|
|
fcntl.lockf(self.f, cmd)
|
|
p = Process(target=try_lockf_on_other_process_fail, args=(TESTFN, cmd))
|
|
p.start()
|
|
p.join()
|
|
fcntl.lockf(self.f, fcntl.LOCK_UN)
|
|
self.assertEqual(p.exitcode, 0)
|
|
|
|
@unittest.skipIf(platform.system() == "AIX", "AIX returns PermissionError")
|
|
def test_lockf_share(self):
|
|
self.f = open(TESTFN, 'wb+')
|
|
cmd = fcntl.LOCK_SH | fcntl.LOCK_NB
|
|
fcntl.lockf(self.f, cmd)
|
|
p = Process(target=try_lockf_on_other_process, args=(TESTFN, cmd))
|
|
p.start()
|
|
p.join()
|
|
fcntl.lockf(self.f, fcntl.LOCK_UN)
|
|
self.assertEqual(p.exitcode, 0)
|
|
|
|
@cpython_only
|
|
def test_flock_overflow(self):
|
|
import _testcapi
|
|
self.assertRaises(OverflowError, fcntl.flock, _testcapi.INT_MAX+1,
|
|
fcntl.LOCK_SH)
|
|
|
|
|
|
def test_main():
|
|
run_unittest(TestFcntl)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|