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import unittest
import os
from test.support import TESTFN, run_unittest, import_fresh_module
import stat
class TestFilemode(unittest.TestCase):
file_flags = {'SF_APPEND', 'SF_ARCHIVED', 'SF_IMMUTABLE', 'SF_NOUNLINK',
'SF_SNAPSHOT', 'UF_APPEND', 'UF_COMPRESSED', 'UF_HIDDEN',
'UF_IMMUTABLE', 'UF_NODUMP', 'UF_NOUNLINK', 'UF_OPAQUE'}
formats = {'S_IFBLK', 'S_IFCHR', 'S_IFDIR', 'S_IFIFO', 'S_IFLNK',
'S_IFREG', 'S_IFSOCK'}
format_funcs = {'S_ISBLK', 'S_ISCHR', 'S_ISDIR', 'S_ISFIFO', 'S_ISLNK',
'S_ISREG', 'S_ISSOCK'}
stat_struct = {
'ST_MODE': 0,
'ST_INO': 1,
'ST_DEV': 2,
'ST_NLINK': 3,
'ST_UID': 4,
'ST_GID': 5,
'ST_SIZE': 6,
'ST_ATIME': 7,
'ST_MTIME': 8,
'ST_CTIME': 9}
# permission bit value are defined by POSIX
permission_bits = {
'S_ISUID': 0o4000,
'S_ISGID': 0o2000,
'S_ENFMT': 0o2000,
'S_ISVTX': 0o1000,
'S_IRWXU': 0o700,
'S_IRUSR': 0o400,
'S_IREAD': 0o400,
'S_IWUSR': 0o200,
'S_IWRITE': 0o200,
'S_IXUSR': 0o100,
'S_IEXEC': 0o100,
'S_IRWXG': 0o070,
'S_IRGRP': 0o040,
'S_IWGRP': 0o020,
'S_IXGRP': 0o010,
'S_IRWXO': 0o007,
'S_IROTH': 0o004,
'S_IWOTH': 0o002,
'S_IXOTH': 0o001}
def setUp(self):
try:
os.remove(TESTFN)
except OSError:
try:
os.rmdir(TESTFN)
except OSError:
pass
tearDown = setUp
def get_mode(self, fname=TESTFN, lstat=True):
if lstat:
st_mode = os.lstat(fname).st_mode
else:
st_mode = os.stat(fname).st_mode
modestr = stat.filemode(st_mode)
return st_mode, modestr
def assertS_IS(self, name, mode):
# test format, lstrip is for S_IFIFO
fmt = getattr(stat, "S_IF" + name.lstrip("F"))
self.assertEqual(stat.S_IFMT(mode), fmt)
# test that just one function returns true
testname = "S_IS" + name
for funcname in self.format_funcs:
func = getattr(stat, funcname, None)
if func is None:
if funcname == testname:
raise ValueError(funcname)
continue
if funcname == testname:
self.assertTrue(func(mode))
else:
self.assertFalse(func(mode))
def test_mode(self):
with open(TESTFN, 'w'):
pass
if os.name == 'posix':
os.chmod(TESTFN, 0o700)
st_mode, modestr = self.get_mode()
self.assertEqual(modestr, '-rwx------')
self.assertS_IS("REG", st_mode)
self.assertEqual(stat.S_IMODE(st_mode),
stat.S_IRWXU)
os.chmod(TESTFN, 0o070)
st_mode, modestr = self.get_mode()
self.assertEqual(modestr, '----rwx---')
self.assertS_IS("REG", st_mode)
self.assertEqual(stat.S_IMODE(st_mode),
stat.S_IRWXG)
os.chmod(TESTFN, 0o007)
st_mode, modestr = self.get_mode()
self.assertEqual(modestr, '-------rwx')
self.assertS_IS("REG", st_mode)
self.assertEqual(stat.S_IMODE(st_mode),
stat.S_IRWXO)
os.chmod(TESTFN, 0o444)
st_mode, modestr = self.get_mode()
self.assertS_IS("REG", st_mode)
self.assertEqual(modestr, '-r--r--r--')
self.assertEqual(stat.S_IMODE(st_mode), 0o444)
else:
os.chmod(TESTFN, 0o700)
st_mode, modestr = self.get_mode()
self.assertEqual(modestr[:3], '-rw')
self.assertS_IS("REG", st_mode)
self.assertEqual(stat.S_IFMT(st_mode),
stat.S_IFREG)
def test_directory(self):
os.mkdir(TESTFN)
os.chmod(TESTFN, 0o700)
st_mode, modestr = self.get_mode()
self.assertS_IS("DIR", st_mode)
if os.name == 'posix':
self.assertEqual(modestr, 'drwx------')
else:
self.assertEqual(modestr[0], 'd')
@unittest.skipUnless(hasattr(os, 'symlink'), 'os.symlink not available')
def test_link(self):
try:
os.symlink(os.getcwd(), TESTFN)
except (OSError, NotImplementedError) as err:
raise unittest.SkipTest(str(err))
else:
st_mode, modestr = self.get_mode()
self.assertEqual(modestr[0], 'l')
self.assertS_IS("LNK", st_mode)
@unittest.skipUnless(hasattr(os, 'mkfifo'), 'os.mkfifo not available')
def test_fifo(self):
os.mkfifo(TESTFN, 0o700)
st_mode, modestr = self.get_mode()
self.assertEqual(modestr, 'prwx------')
self.assertS_IS("FIFO", st_mode)
@unittest.skipUnless(os.name == 'posix', 'requires Posix')
def test_devices(self):
if os.path.exists(os.devnull):
st_mode, modestr = self.get_mode(os.devnull, lstat=False)
self.assertEqual(modestr[0], 'c')
self.assertS_IS("CHR", st_mode)
# Linux block devices, BSD has no block devices anymore
for blockdev in ("/dev/sda", "/dev/hda"):
if os.path.exists(blockdev):
st_mode, modestr = self.get_mode(blockdev, lstat=False)
self.assertEqual(modestr[0], 'b')
self.assertS_IS("BLK", st_mode)
break
def test_module_attributes(self):
for key, value in self.stat_struct.items():
modvalue = getattr(stat, key)
self.assertEqual(value, modvalue, key)
for key, value in self.permission_bits.items():
modvalue = getattr(stat, key)
self.assertEqual(value, modvalue, key)
for key in self.file_flags:
modvalue = getattr(stat, key)
self.assertIsInstance(modvalue, int)
for key in self.formats:
modvalue = getattr(stat, key)
self.assertIsInstance(modvalue, int)
for key in self.format_funcs:
func = getattr(stat, key)
self.assertTrue(callable(func))
self.assertEqual(func(0), 0)
def test_main():
run_unittest(TestFilemode)
if __name__ == '__main__':
test_main()
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