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"""Test program for the fcntl C module.
OS/2+EMX doesn't support the file locking operations.
"""
import struct
import fcntl
import os
import struct
import sys
import unittest
from test.test_support import verbose, TESTFN, unlink, run_unittest
# TODO - Write tests for ioctl(), flock() and lockf().
try:
import termios
except ImportError:
termios = None
def get_lockdata():
if sys.platform.startswith('atheos'):
start_len = "qq"
else:
try:
os.O_LARGEFILE
except AttributeError:
start_len = "ll"
else:
start_len = "qq"
if sys.platform in ('netbsd1', 'netbsd2', 'netbsd3',
'Darwin1.2', 'darwin',
'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
'freebsd6', 'freebsd7', 'freebsd8',
'bsdos2', 'bsdos3', 'bsdos4',
'openbsd', 'openbsd2', 'openbsd3', 'openbsd4'):
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 in ['aix3', 'aix4', 'hp-uxB', 'unixware7']:
lockdata = struct.pack('hhlllii', fcntl.F_WRLCK, 0, 0, 0, 0, 0, 0)
elif sys.platform in ['os2emx']:
lockdata = None
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 not self.f.closed:
self.f.close()
unlink(TESTFN)
def test_fcntl_fileno(self):
# the example from the library docs
self.f = open(TESTFN, 'w')
rv = fcntl.fcntl(self.f.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
if verbose:
print 'Status from fcntl with O_NONBLOCK: ', rv
if sys.platform not in ['os2emx']:
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, 'w')
rv = fcntl.fcntl(self.f, fcntl.F_SETFL, os.O_NONBLOCK)
if sys.platform not in ['os2emx']:
rv = fcntl.fcntl(self.f, fcntl.F_SETLKW, lockdata)
self.f.close()
class TestIoctl(unittest.TestCase):
if termios:
def test_ioctl_signed_unsigned_code_param(self):
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))
# We're just testing that these calls do not raise exceptions.
saved_winsz = fcntl.ioctl(0, termios.TIOCGWINSZ, "\0"*8)
our_winsz = struct.pack("HHHH",80,25,0,0)
# test both with a positive and potentially negative ioctl code
new_winsz = fcntl.ioctl(0, set_winsz_opcode_pos, our_winsz)
new_winsz = fcntl.ioctl(0, set_winsz_opcode_maybe_neg, our_winsz)
fcntl.ioctl(0, set_winsz_opcode_maybe_neg, saved_winsz)
def test_main():
run_unittest(TestFcntl)
run_unittest(TestIoctl)
if __name__ == '__main__':
test_main()
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