"Test posix functions" from test import support # Skip these tests if there is no posix module. posix = support.import_module('posix') import errno import sys import time import os import platform import pwd import stat import tempfile import unittest import warnings _DUMMY_SYMLINK = os.path.join(tempfile.gettempdir(), support.TESTFN + '-dummy-symlink') class PosixTester(unittest.TestCase): def setUp(self): # create empty file fp = open(support.TESTFN, 'w+') fp.close() self.teardown_files = [ support.TESTFN ] self._warnings_manager = support.check_warnings() self._warnings_manager.__enter__() warnings.filterwarnings('ignore', '.* potential security risk .*', RuntimeWarning) def tearDown(self): for teardown_file in self.teardown_files: support.unlink(teardown_file) self._warnings_manager.__exit__(None, None, None) def testNoArgFunctions(self): # test posix functions which take no arguments and have # no side-effects which we need to cleanup (e.g., fork, wait, abort) NO_ARG_FUNCTIONS = [ "ctermid", "getcwd", "getcwdb", "uname", "times", "getloadavg", "getegid", "geteuid", "getgid", "getgroups", "getpid", "getpgrp", "getppid", "getuid", "sync", ] for name in NO_ARG_FUNCTIONS: posix_func = getattr(posix, name, None) if posix_func is not None: posix_func() self.assertRaises(TypeError, posix_func, 1) @unittest.skipUnless(hasattr(posix, 'getresuid'), 'test needs posix.getresuid()') def test_getresuid(self): user_ids = posix.getresuid() self.assertEqual(len(user_ids), 3) for val in user_ids: self.assertGreaterEqual(val, 0) @unittest.skipUnless(hasattr(posix, 'getresgid'), 'test needs posix.getresgid()') def test_getresgid(self): group_ids = posix.getresgid() self.assertEqual(len(group_ids), 3) for val in group_ids: self.assertGreaterEqual(val, 0) @unittest.skipUnless(hasattr(posix, 'setresuid'), 'test needs posix.setresuid()') def test_setresuid(self): current_user_ids = posix.getresuid() self.assertIsNone(posix.setresuid(*current_user_ids)) # -1 means don't change that value. self.assertIsNone(posix.setresuid(-1, -1, -1)) @unittest.skipUnless(hasattr(posix, 'setresuid'), 'test needs posix.setresuid()') def test_setresuid_exception(self): # Don't do this test if someone is silly enough to run us as root. current_user_ids = posix.getresuid() if 0 not in current_user_ids: new_user_ids = (current_user_ids[0]+1, -1, -1) self.assertRaises(OSError, posix.setresuid, *new_user_ids) @unittest.skipUnless(hasattr(posix, 'setresgid'), 'test needs posix.setresgid()') def test_setresgid(self): current_group_ids = posix.getresgid() self.assertIsNone(posix.setresgid(*current_group_ids)) # -1 means don't change that value. self.assertIsNone(posix.setresgid(-1, -1, -1)) @unittest.skipUnless(hasattr(posix, 'setresgid'), 'test needs posix.setresgid()') def test_setresgid_exception(self): # Don't do this test if someone is silly enough to run us as root. current_group_ids = posix.getresgid() if 0 not in current_group_ids: new_group_ids = (current_group_ids[0]+1, -1, -1) self.assertRaises(OSError, posix.setresgid, *new_group_ids) @unittest.skipUnless(hasattr(posix, 'initgroups'), "test needs os.initgroups()") def test_initgroups(self): # It takes a string and an integer; check that it raises a TypeError # for other argument lists. self.assertRaises(TypeError, posix.initgroups) self.assertRaises(TypeError, posix.initgroups, None) self.assertRaises(TypeError, posix.initgroups, 3, "foo") self.assertRaises(TypeError, posix.initgroups, "foo", 3, object()) # If a non-privileged user invokes it, it should fail with OSError # EPERM. if os.getuid() != 0: try: name = pwd.getpwuid(posix.getuid()).pw_name except KeyError: # the current UID may not have a pwd entry raise unittest.SkipTest("need a pwd entry") try: posix.initgroups(name, 13) except OSError as e: self.assertEqual(e.errno, errno.EPERM) else: self.fail("Expected OSError to be raised by initgroups") @unittest.skipUnless(hasattr(posix, 'statvfs'), 'test needs posix.statvfs()') def test_statvfs(self): self.assertTrue(posix.statvfs(os.curdir)) @unittest.skipUnless(hasattr(posix, 'fstatvfs'), 'test needs posix.fstatvfs()') def test_fstatvfs(self): fp = open(support.TESTFN) try: self.assertTrue(posix.fstatvfs(fp.fileno())) self.assertTrue(posix.statvfs(fp.fileno())) finally: fp.close() @unittest.skipUnless(hasattr(posix, 'ftruncate'), 'test needs posix.ftruncate()') def test_ftruncate(self): fp = open(support.TESTFN, 'w+') try: # we need to have some data to truncate fp.write('test') fp.flush() posix.ftruncate(fp.fileno(), 0) finally: fp.close() @unittest.skipUnless(hasattr(posix, 'truncate'), "test needs posix.truncate()") def test_truncate(self): with open(support.TESTFN, 'w') as fp: fp.write('test') fp.flush() posix.truncate(support.TESTFN, 0) @unittest.skipUnless(getattr(os, 'execve', None) in os.supports_fd, "test needs execve() to support the fd parameter") @unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()") @unittest.skipUnless(hasattr(os, 'waitpid'), "test needs os.waitpid()") def test_fexecve(self): fp = os.open(sys.executable, os.O_RDONLY) try: pid = os.fork() if pid == 0: os.chdir(os.path.split(sys.executable)[0]) posix.execve(fp, [sys.executable, '-c', 'pass'], os.environ) else: self.assertEqual(os.waitpid(pid, 0), (pid, 0)) finally: os.close(fp) @unittest.skipUnless(hasattr(posix, 'waitid'), "test needs posix.waitid()") @unittest.skipUnless(hasattr(os, 'fork'), "test needs os.fork()") def test_waitid(self): pid = os.fork() if pid == 0: os.chdir(os.path.split(sys.executable)[0]) posix.execve(sys.executable, [sys.executable, '-c', 'pass'], os.environ) else: res = posix.waitid(posix.P_PID, pid, posix.WEXITED) self.assertEqual(pid, res.si_pid) @unittest.skipUnless(hasattr(posix, 'lockf'), "test needs posix.lockf()") def test_lockf(self): fd = os.open(support.TESTFN, os.O_WRONLY | os.O_CREAT) try: os.write(fd, b'test') os.lseek(fd, 0, os.SEEK_SET) posix.lockf(fd, posix.F_LOCK, 4) # section is locked posix.lockf(fd, posix.F_ULOCK, 4) finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'pread'), "test needs posix.pread()") def test_pread(self): fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT) try: os.write(fd, b'test') os.lseek(fd, 0, os.SEEK_SET) self.assertEqual(b'es', posix.pread(fd, 2, 1)) # the first pread() shouldn't disturb the file offset self.assertEqual(b'te', posix.read(fd, 2)) finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'pwrite'), "test needs posix.pwrite()") def test_pwrite(self): fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT) try: os.write(fd, b'test') os.lseek(fd, 0, os.SEEK_SET) posix.pwrite(fd, b'xx', 1) self.assertEqual(b'txxt', posix.read(fd, 4)) finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'posix_fallocate'), "test needs posix.posix_fallocate()") def test_posix_fallocate(self): fd = os.open(support.TESTFN, os.O_WRONLY | os.O_CREAT) try: posix.posix_fallocate(fd, 0, 10) except OSError as inst: # issue10812, ZFS doesn't appear to support posix_fallocate, # so skip Solaris-based since they are likely to have ZFS. if inst.errno != errno.EINVAL or not sys.platform.startswith("sunos"): raise finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'posix_fadvise'), "test needs posix.posix_fadvise()") def test_posix_fadvise(self): fd = os.open(support.TESTFN, os.O_RDONLY) try: posix.posix_fadvise(fd, 0, 0, posix.POSIX_FADV_WILLNEED) finally: os.close(fd) @unittest.skipUnless(os.utime in os.supports_fd, "test needs fd support in os.utime") def test_utime_with_fd(self): now = time.time() fd = os.open(support.TESTFN, os.O_RDONLY) try: posix.utime(fd) posix.utime(fd, None) self.assertRaises(TypeError, posix.utime, fd, (None, None)) self.assertRaises(TypeError, posix.utime, fd, (now, None)) self.assertRaises(TypeError, posix.utime, fd, (None, now)) posix.utime(fd, (int(now), int(now))) posix.utime(fd, (now, now)) self.assertRaises(ValueError, posix.utime, fd, (now, now), ns=(now, now)) self.assertRaises(ValueError, posix.utime, fd, (now, 0), ns=(None, None)) self.assertRaises(ValueError, posix.utime, fd, (None, None), ns=(now, 0)) posix.utime(fd, (int(now), int((now - int(now)) * 1e9))) posix.utime(fd, ns=(int(now), int((now - int(now)) * 1e9))) finally: os.close(fd) @unittest.skipUnless(os.utime in os.supports_follow_symlinks, "test needs follow_symlinks support in os.utime") def test_utime_nofollow_symlinks(self): now = time.time() posix.utime(support.TESTFN, None, follow_symlinks=False) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, None), follow_symlinks=False) self.assertRaises(TypeError, posix.utime, support.TESTFN, (now, None), follow_symlinks=False) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, now), follow_symlinks=False) posix.utime(support.TESTFN, (int(now), int(now)), follow_symlinks=False) posix.utime(support.TESTFN, (now, now), follow_symlinks=False) posix.utime(support.TESTFN, follow_symlinks=False) @unittest.skipUnless(hasattr(posix, 'writev'), "test needs posix.writev()") def test_writev(self): fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT) try: n = os.writev(fd, (b'test1', b'tt2', b't3')) self.assertEqual(n, 10) os.lseek(fd, 0, os.SEEK_SET) self.assertEqual(b'test1tt2t3', posix.read(fd, 10)) # Issue #20113: empty list of buffers should not crash try: size = posix.writev(fd, []) except OSError: # writev(fd, []) raises OSError(22, "Invalid argument") # on OpenIndiana pass else: self.assertEqual(size, 0) finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'readv'), "test needs posix.readv()") def test_readv(self): fd = os.open(support.TESTFN, os.O_RDWR | os.O_CREAT) try: os.write(fd, b'test1tt2t3') os.lseek(fd, 0, os.SEEK_SET) buf = [bytearray(i) for i in [5, 3, 2]] self.assertEqual(posix.readv(fd, buf), 10) self.assertEqual([b'test1', b'tt2', b't3'], [bytes(i) for i in buf]) # Issue #20113: empty list of buffers should not crash try: size = posix.readv(fd, []) except OSError: # readv(fd, []) raises OSError(22, "Invalid argument") # on OpenIndiana pass else: self.assertEqual(size, 0) finally: os.close(fd) @unittest.skipUnless(hasattr(posix, 'dup'), 'test needs posix.dup()') def test_dup(self): fp = open(support.TESTFN) try: fd = posix.dup(fp.fileno()) self.assertIsInstance(fd, int) os.close(fd) finally: fp.close() @unittest.skipUnless(hasattr(posix, 'confstr'), 'test needs posix.confstr()') def test_confstr(self): self.assertRaises(ValueError, posix.confstr, "CS_garbage") self.assertEqual(len(posix.confstr("CS_PATH")) > 0, True) @unittest.skipUnless(hasattr(posix, 'dup2'), 'test needs posix.dup2()') def test_dup2(self): fp1 = open(support.TESTFN) fp2 = open(support.TESTFN) try: posix.dup2(fp1.fileno(), fp2.fileno()) finally: fp1.close() fp2.close() @unittest.skipUnless(hasattr(os, 'O_CLOEXEC'), "needs os.O_CLOEXEC") @support.requires_linux_version(2, 6, 23) def test_oscloexec(self): fd = os.open(support.TESTFN, os.O_RDONLY|os.O_CLOEXEC) self.addCleanup(os.close, fd) self.assertFalse(os.get_inheritable(fd)) @unittest.skipUnless(hasattr(posix, 'O_EXLOCK'), 'test needs posix.O_EXLOCK') def test_osexlock(self): fd = os.open(support.TESTFN, os.O_WRONLY|os.O_EXLOCK|os.O_CREAT) self.assertRaises(OSError, os.open, support.TESTFN, os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK) os.close(fd) if hasattr(posix, "O_SHLOCK"): fd = os.open(support.TESTFN, os.O_WRONLY|os.O_SHLOCK|os.O_CREAT) self.assertRaises(OSError, os.open, support.TESTFN, os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK) os.close(fd) @unittest.skipUnless(hasattr(posix, 'O_SHLOCK'), 'test needs posix.O_SHLOCK') def test_osshlock(self): fd1 = os.open(support.TESTFN, os.O_WRONLY|os.O_SHLOCK|os.O_CREAT) fd2 = os.open(support.TESTFN, os.O_WRONLY|os.O_SHLOCK|os.O_CREAT) os.close(fd2) os.close(fd1) if hasattr(posix, "O_EXLOCK"): fd = os.open(support.TESTFN, os.O_WRONLY|os.O_SHLOCK|os.O_CREAT) self.assertRaises(OSError, os.open, support.TESTFN, os.O_RDONLY|os.O_EXLOCK|os.O_NONBLOCK) os.close(fd) @unittest.skipUnless(hasattr(posix, 'fstat'), 'test needs posix.fstat()') def test_fstat(self): fp = open(support.TESTFN) try: self.assertTrue(posix.fstat(fp.fileno())) self.assertTrue(posix.stat(fp.fileno())) self.assertRaisesRegex(TypeError, 'should be string, bytes or integer, not', posix.stat, float(fp.fileno())) finally: fp.close() @unittest.skipUnless(hasattr(posix, 'stat'), 'test needs posix.stat()') def test_stat(self): self.assertTrue(posix.stat(support.TESTFN)) self.assertTrue(posix.stat(os.fsencode(support.TESTFN))) self.assertTrue(posix.stat(bytearray(os.fsencode(support.TESTFN)))) self.assertRaisesRegex(TypeError, 'should be string, bytes or integer, not', posix.stat, None) self.assertRaisesRegex(TypeError, 'should be string, bytes or integer, not', posix.stat, list(support.TESTFN)) self.assertRaisesRegex(TypeError, 'should be string, bytes or integer, not', posix.stat, list(os.fsencode(support.TESTFN))) @unittest.skipUnless(hasattr(posix, 'mkfifo'), "don't have mkfifo()") def test_mkfifo(self): support.unlink(support.TESTFN) posix.mkfifo(support.TESTFN, stat.S_IRUSR | stat.S_IWUSR) self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode)) @unittest.skipUnless(hasattr(posix, 'mknod') and hasattr(stat, 'S_IFIFO'), "don't have mknod()/S_IFIFO") def test_mknod(self): # Test using mknod() to create a FIFO (the only use specified # by POSIX). support.unlink(support.TESTFN) mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR try: posix.mknod(support.TESTFN, mode, 0) except OSError as e: # Some old systems don't allow unprivileged users to use # mknod(), or only support creating device nodes. self.assertIn(e.errno, (errno.EPERM, errno.EINVAL)) else: self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode)) # Keyword arguments are also supported support.unlink(support.TESTFN) try: posix.mknod(path=support.TESTFN, mode=mode, device=0, dir_fd=None) except OSError as e: self.assertIn(e.errno, (errno.EPERM, errno.EINVAL)) @unittest.skipUnless(hasattr(posix, 'stat'), 'test needs posix.stat()') @unittest.skipUnless(hasattr(posix, 'makedev'), 'test needs posix.makedev()') def test_makedev(self): st = posix.stat(support.TESTFN) dev = st.st_dev self.assertIsInstance(dev, int) self.assertGreaterEqual(dev, 0) major = posix.major(dev) self.assertIsInstance(major, int) self.assertGreaterEqual(major, 0) self.assertEqual(posix.major(dev), major) self.assertRaises(TypeError, posix.major, float(dev)) self.assertRaises(TypeError, posix.major) self.assertRaises((ValueError, OverflowError), posix.major, -1) minor = posix.minor(dev) self.assertIsInstance(minor, int) self.assertGreaterEqual(minor, 0) self.assertEqual(posix.minor(dev), minor) self.assertRaises(TypeError, posix.minor, float(dev)) self.assertRaises(TypeError, posix.minor) self.assertRaises((ValueError, OverflowError), posix.minor, -1) self.assertEqual(posix.makedev(major, minor), dev) self.assertRaises(TypeError, posix.makedev, float(major), minor) self.assertRaises(TypeError, posix.makedev, major, float(minor)) self.assertRaises(TypeError, posix.makedev, major) self.assertRaises(TypeError, posix.makedev) def _test_all_chown_common(self, chown_func, first_param, stat_func): """Common code for chown, fchown and lchown tests.""" def check_stat(uid, gid): if stat_func is not None: stat = stat_func(first_param) self.assertEqual(stat.st_uid, uid) self.assertEqual(stat.st_gid, gid) uid = os.getuid() gid = os.getgid() # test a successful chown call chown_func(first_param, uid, gid) check_stat(uid, gid) chown_func(first_param, -1, gid) check_stat(uid, gid) chown_func(first_param, uid, -1) check_stat(uid, gid) if uid == 0: # Try an amusingly large uid/gid to make sure we handle # large unsigned values. (chown lets you use any # uid/gid you like, even if they aren't defined.) # # This problem keeps coming up: # http://bugs.python.org/issue1747858 # http://bugs.python.org/issue4591 # http://bugs.python.org/issue15301 # Hopefully the fix in 4591 fixes it for good! # # This part of the test only runs when run as root. # Only scary people run their tests as root. big_value = 2**31 chown_func(first_param, big_value, big_value) check_stat(big_value, big_value) chown_func(first_param, -1, -1) check_stat(big_value, big_value) chown_func(first_param, uid, gid) check_stat(uid, gid) elif platform.system() in ('HP-UX', 'SunOS'): # HP-UX and Solaris can allow a non-root user to chown() to root # (issue #5113) raise unittest.SkipTest("Skipping because of non-standard chown() " "behavior") else: # non-root cannot chown to root, raises OSError self.assertRaises(OSError, chown_func, first_param, 0, 0) check_stat(uid, gid) self.assertRaises(OSError, chown_func, first_param, 0, -1) check_stat(uid, gid) if 0 not in os.getgroups(): self.assertRaises(OSError, chown_func, first_param, -1, 0) check_stat(uid, gid) # test illegal types for t in str, float: self.assertRaises(TypeError, chown_func, first_param, t(uid), gid) check_stat(uid, gid) self.assertRaises(TypeError, chown_func, first_param, uid, t(gid)) check_stat(uid, gid) @unittest.skipUnless(hasattr(posix, 'chown'), "test needs os.chown()") def test_chown(self): # raise an OSError if the file does not exist os.unlink(support.TESTFN) self.assertRaises(OSError, posix.chown, support.TESTFN, -1, -1) # re-create the file support.create_empty_file(support.TESTFN) self._test_all_chown_common(posix.chown, support.TESTFN, getattr(posix, 'stat', None)) @unittest.skipUnless(hasattr(posix, 'fchown'), "test needs os.fchown()") def test_fchown(self): os.unlink(support.TESTFN) # re-create the file test_file = open(support.TESTFN, 'w') try: fd = test_file.fileno() self._test_all_chown_common(posix.fchown, fd, getattr(posix, 'fstat', None)) finally: test_file.close() @unittest.skipUnless(hasattr(posix, 'lchown'), "test needs os.lchown()") def test_lchown(self): os.unlink(support.TESTFN) # create a symlink os.symlink(_DUMMY_SYMLINK, support.TESTFN) self._test_all_chown_common(posix.lchown, support.TESTFN, getattr(posix, 'lstat', None)) @unittest.skipUnless(hasattr(posix, 'chdir'), 'test needs posix.chdir()') def test_chdir(self): posix.chdir(os.curdir) self.assertRaises(OSError, posix.chdir, support.TESTFN) def test_listdir(self): self.assertTrue(support.TESTFN in posix.listdir(os.curdir)) def test_listdir_default(self): # When listdir is called without argument, # it's the same as listdir(os.curdir). self.assertTrue(support.TESTFN in posix.listdir()) def test_listdir_bytes(self): # When listdir is called with a bytes object, # the returned strings are of type bytes. self.assertTrue(os.fsencode(support.TESTFN) in posix.listdir(b'.')) @unittest.skipUnless(posix.listdir in os.supports_fd, "test needs fd support for posix.listdir()") def test_listdir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) self.addCleanup(posix.close, f) self.assertEqual( sorted(posix.listdir('.')), sorted(posix.listdir(f)) ) # Check that the fd offset was reset (issue #13739) self.assertEqual( sorted(posix.listdir('.')), sorted(posix.listdir(f)) ) @unittest.skipUnless(hasattr(posix, 'access'), 'test needs posix.access()') def test_access(self): self.assertTrue(posix.access(support.TESTFN, os.R_OK)) @unittest.skipUnless(hasattr(posix, 'umask'), 'test needs posix.umask()') def test_umask(self): old_mask = posix.umask(0) self.assertIsInstance(old_mask, int) posix.umask(old_mask) @unittest.skipUnless(hasattr(posix, 'strerror'), 'test needs posix.strerror()') def test_strerror(self): self.assertTrue(posix.strerror(0)) @unittest.skipUnless(hasattr(posix, 'pipe'), 'test needs posix.pipe()') def test_pipe(self): reader, writer = posix.pipe() os.close(reader) os.close(writer) @unittest.skipUnless(hasattr(os, 'pipe2'), "test needs os.pipe2()") @support.requires_linux_version(2, 6, 27) def test_pipe2(self): self.assertRaises(TypeError, os.pipe2, 'DEADBEEF') self.assertRaises(TypeError, os.pipe2, 0, 0) # try calling with flags = 0, like os.pipe() r, w = os.pipe2(0) os.close(r) os.close(w) # test flags r, w = os.pipe2(os.O_CLOEXEC|os.O_NONBLOCK) self.addCleanup(os.close, r) self.addCleanup(os.close, w) self.assertFalse(os.get_inheritable(r)) self.assertFalse(os.get_inheritable(w)) self.assertFalse(os.get_blocking(r)) self.assertFalse(os.get_blocking(w)) # try reading from an empty pipe: this should fail, not block self.assertRaises(OSError, os.read, r, 1) # try a write big enough to fill-up the pipe: this should either # fail or perform a partial write, not block try: os.write(w, b'x' * support.PIPE_MAX_SIZE) except OSError: pass @support.cpython_only @unittest.skipUnless(hasattr(os, 'pipe2'), "test needs os.pipe2()") @support.requires_linux_version(2, 6, 27) def test_pipe2_c_limits(self): # Issue 15989 import _testcapi self.assertRaises(OverflowError, os.pipe2, _testcapi.INT_MAX + 1) self.assertRaises(OverflowError, os.pipe2, _testcapi.UINT_MAX + 1) @unittest.skipUnless(hasattr(posix, 'utime'), 'test needs posix.utime()') def test_utime(self): now = time.time() posix.utime(support.TESTFN, None) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, None)) self.assertRaises(TypeError, posix.utime, support.TESTFN, (now, None)) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, now)) posix.utime(support.TESTFN, (int(now), int(now))) posix.utime(support.TESTFN, (now, now)) def _test_chflags_regular_file(self, chflags_func, target_file, **kwargs): st = os.stat(target_file) self.assertTrue(hasattr(st, 'st_flags')) # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE. flags = st.st_flags | stat.UF_IMMUTABLE try: chflags_func(target_file, flags, **kwargs) except OSError as err: if err.errno != errno.EOPNOTSUPP: raise msg = 'chflag UF_IMMUTABLE not supported by underlying fs' self.skipTest(msg) try: new_st = os.stat(target_file) self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags) try: fd = open(target_file, 'w+') except OSError as e: self.assertEqual(e.errno, errno.EPERM) finally: posix.chflags(target_file, st.st_flags) @unittest.skipUnless(hasattr(posix, 'chflags'), 'test needs os.chflags()') def test_chflags(self): self._test_chflags_regular_file(posix.chflags, support.TESTFN) @unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()') def test_lchflags_regular_file(self): self._test_chflags_regular_file(posix.lchflags, support.TESTFN) self._test_chflags_regular_file(posix.chflags, support.TESTFN, follow_symlinks=False) @unittest.skipUnless(hasattr(posix, 'lchflags'), 'test needs os.lchflags()') def test_lchflags_symlink(self): testfn_st = os.stat(support.TESTFN) self.assertTrue(hasattr(testfn_st, 'st_flags')) os.symlink(support.TESTFN, _DUMMY_SYMLINK) self.teardown_files.append(_DUMMY_SYMLINK) dummy_symlink_st = os.lstat(_DUMMY_SYMLINK) def chflags_nofollow(path, flags): return posix.chflags(path, flags, follow_symlinks=False) for fn in (posix.lchflags, chflags_nofollow): # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE. flags = dummy_symlink_st.st_flags | stat.UF_IMMUTABLE try: fn(_DUMMY_SYMLINK, flags) except OSError as err: if err.errno != errno.EOPNOTSUPP: raise msg = 'chflag UF_IMMUTABLE not supported by underlying fs' self.skipTest(msg) try: new_testfn_st = os.stat(support.TESTFN) new_dummy_symlink_st = os.lstat(_DUMMY_SYMLINK) self.assertEqual(testfn_st.st_flags, new_testfn_st.st_flags) self.assertEqual(dummy_symlink_st.st_flags | stat.UF_IMMUTABLE, new_dummy_symlink_st.st_flags) finally: fn(_DUMMY_SYMLINK, dummy_symlink_st.st_flags) def test_environ(self): if os.name == "nt": item_type = str else: item_type = bytes for k, v in posix.environ.items(): self.assertEqual(type(k), item_type) self.assertEqual(type(v), item_type) @unittest.skipUnless(hasattr(posix, 'getcwd'), 'test needs posix.getcwd()') def test_getcwd_long_pathnames(self): dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef' curdir = os.getcwd() base_path = os.path.abspath(support.TESTFN) + '.getcwd' try: os.mkdir(base_path) os.chdir(base_path) except: # Just returning nothing instead of the SkipTest exception, because # the test results in Error in that case. Is that ok? # raise unittest.SkipTest("cannot create directory for testing") return def _create_and_do_getcwd(dirname, current_path_length = 0): try: os.mkdir(dirname) except: raise unittest.SkipTest("mkdir cannot create directory sufficiently deep for getcwd test") os.chdir(dirname) try: os.getcwd() if current_path_length < 1027: _create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1) finally: os.chdir('..') os.rmdir(dirname) _create_and_do_getcwd(dirname) finally: os.chdir(curdir) support.rmtree(base_path) @unittest.skipUnless(hasattr(posix, 'getgrouplist'), "test needs posix.getgrouplist()") @unittest.skipUnless(hasattr(pwd, 'getpwuid'), "test needs pwd.getpwuid()") @unittest.skipUnless(hasattr(os, 'getuid'), "test needs os.getuid()") def test_getgrouplist(self): user = pwd.getpwuid(os.getuid())[0] group = pwd.getpwuid(os.getuid())[3] self.assertIn(group, posix.getgrouplist(user, group)) @unittest.skipUnless(hasattr(os, 'getegid'), "test needs os.getegid()") def test_getgroups(self): with os.popen('id -G 2>/dev/null') as idg: groups = idg.read().strip() ret = idg.close() if ret is not None or not groups: raise unittest.SkipTest("need working 'id -G'") # Issues 16698: OS X ABIs prior to 10.6 have limits on getgroups() if sys.platform == 'darwin': import sysconfig dt = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET') or '10.0' if tuple(int(n) for n in dt.split('.')[0:2]) < (10, 6): raise unittest.SkipTest("getgroups(2) is broken prior to 10.6") # 'id -G' and 'os.getgroups()' should return the same # groups, ignoring order and duplicates. # #10822 - it is implementation defined whether posix.getgroups() # includes the effective gid so we include it anyway, since id -G does self.assertEqual( set([int(x) for x in groups.split()]), set(posix.getgroups() + [posix.getegid()])) # tests for the posix *at functions follow @unittest.skipUnless(os.access in os.supports_dir_fd, "test needs dir_fd support for os.access()") def test_access_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) try: self.assertTrue(posix.access(support.TESTFN, os.R_OK, dir_fd=f)) finally: posix.close(f) @unittest.skipUnless(os.chmod in os.supports_dir_fd, "test needs dir_fd support in os.chmod()") def test_chmod_dir_fd(self): os.chmod(support.TESTFN, stat.S_IRUSR) f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.chmod(support.TESTFN, stat.S_IRUSR | stat.S_IWUSR, dir_fd=f) s = posix.stat(support.TESTFN) self.assertEqual(s[0] & stat.S_IRWXU, stat.S_IRUSR | stat.S_IWUSR) finally: posix.close(f) @unittest.skipUnless(os.chown in os.supports_dir_fd, "test needs dir_fd support in os.chown()") def test_chown_dir_fd(self): support.unlink(support.TESTFN) support.create_empty_file(support.TESTFN) f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.chown(support.TESTFN, os.getuid(), os.getgid(), dir_fd=f) finally: posix.close(f) @unittest.skipUnless(os.stat in os.supports_dir_fd, "test needs dir_fd support in os.stat()") def test_stat_dir_fd(self): support.unlink(support.TESTFN) with open(support.TESTFN, 'w') as outfile: outfile.write("testline\n") f = posix.open(posix.getcwd(), posix.O_RDONLY) try: s1 = posix.stat(support.TESTFN) s2 = posix.stat(support.TESTFN, dir_fd=f) self.assertEqual(s1, s2) s2 = posix.stat(support.TESTFN, dir_fd=None) self.assertEqual(s1, s2) self.assertRaisesRegex(TypeError, 'should be integer or None, not', posix.stat, support.TESTFN, dir_fd=posix.getcwd()) self.assertRaisesRegex(TypeError, 'should be integer or None, not', posix.stat, support.TESTFN, dir_fd=float(f)) self.assertRaises(OverflowError, posix.stat, support.TESTFN, dir_fd=10**20) finally: posix.close(f) @unittest.skipUnless(os.utime in os.supports_dir_fd, "test needs dir_fd support in os.utime()") def test_utime_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) try: now = time.time() posix.utime(support.TESTFN, None, dir_fd=f) posix.utime(support.TESTFN, dir_fd=f) self.assertRaises(TypeError, posix.utime, support.TESTFN, now, dir_fd=f) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, None), dir_fd=f) self.assertRaises(TypeError, posix.utime, support.TESTFN, (now, None), dir_fd=f) self.assertRaises(TypeError, posix.utime, support.TESTFN, (None, now), dir_fd=f) self.assertRaises(TypeError, posix.utime, support.TESTFN, (now, "x"), dir_fd=f) posix.utime(support.TESTFN, (int(now), int(now)), dir_fd=f) posix.utime(support.TESTFN, (now, now), dir_fd=f) posix.utime(support.TESTFN, (int(now), int((now - int(now)) * 1e9)), dir_fd=f) posix.utime(support.TESTFN, dir_fd=f, times=(int(now), int((now - int(now)) * 1e9))) # try dir_fd and follow_symlinks together if os.utime in os.supports_follow_symlinks: try: posix.utime(support.TESTFN, follow_symlinks=False, dir_fd=f) except ValueError: # whoops! using both together not supported on this platform. pass finally: posix.close(f) @unittest.skipUnless(os.link in os.supports_dir_fd, "test needs dir_fd support in os.link()") def test_link_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.link(support.TESTFN, support.TESTFN + 'link', src_dir_fd=f, dst_dir_fd=f) # should have same inodes self.assertEqual(posix.stat(support.TESTFN)[1], posix.stat(support.TESTFN + 'link')[1]) finally: posix.close(f) support.unlink(support.TESTFN + 'link') @unittest.skipUnless(os.mkdir in os.supports_dir_fd, "test needs dir_fd support in os.mkdir()") def test_mkdir_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.mkdir(support.TESTFN + 'dir', dir_fd=f) posix.stat(support.TESTFN + 'dir') # should not raise exception finally: posix.close(f) support.rmtree(support.TESTFN + 'dir') @unittest.skipUnless((os.mknod in os.supports_dir_fd) and hasattr(stat, 'S_IFIFO'), "test requires both stat.S_IFIFO and dir_fd support for os.mknod()") def test_mknod_dir_fd(self): # Test using mknodat() to create a FIFO (the only use specified # by POSIX). support.unlink(support.TESTFN) mode = stat.S_IFIFO | stat.S_IRUSR | stat.S_IWUSR f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.mknod(support.TESTFN, mode, 0, dir_fd=f) except OSError as e: # Some old systems don't allow unprivileged users to use # mknod(), or only support creating device nodes. self.assertIn(e.errno, (errno.EPERM, errno.EINVAL)) else: self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode)) finally: posix.close(f) @unittest.skipUnless(os.open in os.supports_dir_fd, "test needs dir_fd support in os.open()") def test_open_dir_fd(self): support.unlink(support.TESTFN) with open(support.TESTFN, 'w') as outfile: outfile.write("testline\n") a = posix.open(posix.getcwd(), posix.O_RDONLY) b = posix.open(support.TESTFN, posix.O_RDONLY, dir_fd=a) try: res = posix.read(b, 9).decode(encoding="utf-8") self.assertEqual("testline\n", res) finally: posix.close(a) posix.close(b) @unittest.skipUnless(os.readlink in os.supports_dir_fd, "test needs dir_fd support in os.readlink()") def test_readlink_dir_fd(self): os.symlink(support.TESTFN, support.TESTFN + 'link') f = posix.open(posix.getcwd(), posix.O_RDONLY) try: self.assertEqual(posix.readlink(support.TESTFN + 'link'), posix.readlink(support.TESTFN + 'link', dir_fd=f)) finally: support.unlink(support.TESTFN + 'link') posix.close(f) @unittest.skipUnless(os.rename in os.supports_dir_fd, "test needs dir_fd support in os.rename()") def test_rename_dir_fd(self): support.unlink(support.TESTFN) support.create_empty_file(support.TESTFN + 'ren') f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.rename(support.TESTFN + 'ren', support.TESTFN, src_dir_fd=f, dst_dir_fd=f) except: posix.rename(support.TESTFN + 'ren', support.TESTFN) raise else: posix.stat(support.TESTFN) # should not raise exception finally: posix.close(f) @unittest.skipUnless(os.symlink in os.supports_dir_fd, "test needs dir_fd support in os.symlink()") def test_symlink_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.symlink(support.TESTFN, support.TESTFN + 'link', dir_fd=f) self.assertEqual(posix.readlink(support.TESTFN + 'link'), support.TESTFN) finally: posix.close(f) support.unlink(support.TESTFN + 'link') @unittest.skipUnless(os.unlink in os.supports_dir_fd, "test needs dir_fd support in os.unlink()") def test_unlink_dir_fd(self): f = posix.open(posix.getcwd(), posix.O_RDONLY) support.create_empty_file(support.TESTFN + 'del') posix.stat(support.TESTFN + 'del') # should not raise exception try: posix.unlink(support.TESTFN + 'del', dir_fd=f) except: support.unlink(support.TESTFN + 'del') raise else: self.assertRaises(OSError, posix.stat, support.TESTFN + 'link') finally: posix.close(f) @unittest.skipUnless(os.mkfifo in os.supports_dir_fd, "test needs dir_fd support in os.mkfifo()") def test_mkfifo_dir_fd(self): support.unlink(support.TESTFN) f = posix.open(posix.getcwd(), posix.O_RDONLY) try: posix.mkfifo(support.TESTFN, stat.S_IRUSR | stat.S_IWUSR, dir_fd=f) self.assertTrue(stat.S_ISFIFO(posix.stat(support.TESTFN).st_mode)) finally: posix.close(f) requires_sched_h = unittest.skipUnless(hasattr(posix, 'sched_yield'), "don't have scheduling support") requires_sched_affinity = unittest.skipUnless(hasattr(posix, 'sched_setaffinity'), "don't have sched affinity support") @requires_sched_h def test_sched_yield(self): # This has no error conditions (at least on Linux). posix.sched_yield() @requires_sched_h @unittest.skipUnless(hasattr(posix, 'sched_get_priority_max'), "requires sched_get_priority_max()") def test_sched_priority(self): # Round-robin usually has interesting priorities. pol = posix.SCHED_RR lo = posix.sched_get_priority_min(pol) hi = posix.sched_get_priority_max(pol) self.assertIsInstance(lo, int) self.assertIsInstance(hi, int) self.assertGreaterEqual(hi, lo) # OSX evidently just returns 15 without checking the argument. if sys.platform != "darwin": self.assertRaises(OSError, posix.sched_get_priority_min, -23) self.assertRaises(OSError, posix.sched_get_priority_max, -23) @unittest.skipUnless(hasattr(posix, 'sched_setscheduler'), "can't change scheduler") def test_get_and_set_scheduler_and_param(self): possible_schedulers = [sched for name, sched in posix.__dict__.items() if name.startswith("SCHED_")] mine = posix.sched_getscheduler(0) self.assertIn(mine, possible_schedulers) try: parent = posix.sched_getscheduler(os.getppid()) except OSError as e: if e.errno != errno.EPERM: raise else: self.assertIn(parent, possible_schedulers) self.assertRaises(OSError, posix.sched_getscheduler, -1) self.assertRaises(OSError, posix.sched_getparam, -1) param = posix.sched_getparam(0) self.assertIsInstance(param.sched_priority, int) # POSIX states that calling sched_setparam() or sched_setscheduler() on # a process with a scheduling policy other than SCHED_FIFO or SCHED_RR # is implementation-defined: NetBSD and FreeBSD can return EINVAL. if not sys.platform.startswith(('freebsd', 'netbsd')): try: posix.sched_setscheduler(0, mine, param) posix.sched_setparam(0, param) except OSError as e: if e.errno != errno.EPERM: raise self.assertRaises(OSError, posix.sched_setparam, -1, param) self.assertRaises(OSError, posix.sched_setscheduler, -1, mine, param) self.assertRaises(TypeError, posix.sched_setscheduler, 0, mine, None) self.assertRaises(TypeError, posix.sched_setparam, 0, 43) param = posix.sched_param(None) self.assertRaises(TypeError, posix.sched_setparam, 0, param) large = 214748364700 param = posix.sched_param(large) self.assertRaises(OverflowError, posix.sched_setparam, 0, param) param = posix.sched_param(sched_priority=-large) self.assertRaises(OverflowError, posix.sched_setparam, 0, param) @unittest.skipUnless(hasattr(posix, "sched_rr_get_interval"), "no function") def test_sched_rr_get_interval(self): try: interval = posix.sched_rr_get_interval(0) except OSError as e: # This likely means that sched_rr_get_interval is only valid for # processes with the SCHED_RR scheduler in effect. if e.errno != errno.EINVAL: raise self.skipTest("only works on SCHED_RR processes") self.assertIsInstance(interval, float) # Reasonable constraints, I think. self.assertGreaterEqual(interval, 0.) self.assertLess(interval, 1.) @requires_sched_affinity def test_sched_getaffinity(self): mask = posix.sched_getaffinity(0) self.assertIsInstance(mask, set) self.assertGreaterEqual(len(mask), 1) self.assertRaises(OSError, posix.sched_getaffinity, -1) for cpu in mask: self.assertIsInstance(cpu, int) self.assertGreaterEqual(cpu, 0) self.assertLess(cpu, 1 << 32) @requires_sched_affinity def test_sched_setaffinity(self): mask = posix.sched_getaffinity(0) if len(mask) > 1: # Empty masks are forbidden mask.pop() posix.sched_setaffinity(0, mask) self.assertEqual(posix.sched_getaffinity(0), mask) self.assertRaises(OSError, posix.sched_setaffinity, 0, []) self.assertRaises(ValueError, posix.sched_setaffinity, 0, [-10]) self.assertRaises(OverflowError, posix.sched_setaffinity, 0, [1<<128]) self.assertRaises(OSError, posix.sched_setaffinity, -1, mask) def test_rtld_constants(self): # check presence of major RTLD_* constants posix.RTLD_LAZY posix.RTLD_NOW posix.RTLD_GLOBAL posix.RTLD_LOCAL @unittest.skipUnless(hasattr(os, 'SEEK_HOLE'), "test needs an OS that reports file holes") def test_fs_holes(self): # Even if the filesystem doesn't report holes, # if the OS supports it the SEEK_* constants # will be defined and will have a consistent # behaviour: # os.SEEK_DATA = current position # os.SEEK_HOLE = end of file position with open(support.TESTFN, 'r+b') as fp: fp.write(b"hello") fp.flush() size = fp.tell() fno = fp.fileno() try : for i in range(size): self.assertEqual(i, os.lseek(fno, i, os.SEEK_DATA)) self.assertLessEqual(size, os.lseek(fno, i, os.SEEK_HOLE)) self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_DATA) self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_HOLE) except OSError : # Some OSs claim to support SEEK_HOLE/SEEK_DATA # but it is not true. # For instance: # http://lists.freebsd.org/pipermail/freebsd-amd64/2012-January/014332.html raise unittest.SkipTest("OSError raised!") def test_path_error2(self): """ Test functions that call path_error2(), providing two filenames in their exceptions. """ for name in ("rename", "replace", "link"): function = getattr(os, name, None) if function is None: continue for dst in ("noodly2", support.TESTFN): try: function('doesnotexistfilename', dst) except OSError as e: self.assertIn("'doesnotexistfilename' -> '{}'".format(dst), str(e)) break else: self.fail("No valid path_error2() test for os." + name) def test_path_with_null_character(self): fn = support.TESTFN fn_with_NUL = fn + '\0' self.addCleanup(support.unlink, fn) support.unlink(fn) fd = None try: with self.assertRaises(ValueError): fd = os.open(fn_with_NUL, os.O_WRONLY | os.O_CREAT) # raises finally: if fd is not None: os.close(fd) self.assertFalse(os.path.exists(fn)) self.assertRaises(ValueError, os.mkdir, fn_with_NUL) self.assertFalse(os.path.exists(fn)) open(fn, 'wb').close() self.assertRaises(ValueError, os.stat, fn_with_NUL) def test_path_with_null_byte(self): fn = os.fsencode(support.TESTFN) fn_with_NUL = fn + b'\0' self.addCleanup(support.unlink, fn) support.unlink(fn) fd = None try: with self.assertRaises(ValueError): fd = os.open(fn_with_NUL, os.O_WRONLY | os.O_CREAT) # raises finally: if fd is not None: os.close(fd) self.assertFalse(os.path.exists(fn)) self.assertRaises(ValueError, os.mkdir, fn_with_NUL) self.assertFalse(os.path.exists(fn)) open(fn, 'wb').close() self.assertRaises(ValueError, os.stat, fn_with_NUL) class PosixGroupsTester(unittest.TestCase): def setUp(self): if posix.getuid() != 0: raise unittest.SkipTest("not enough privileges") if not hasattr(posix, 'getgroups'): raise unittest.SkipTest("need posix.getgroups") if sys.platform == 'darwin': raise unittest.SkipTest("getgroups(2) is broken on OSX") self.saved_groups = posix.getgroups() def tearDown(self): if hasattr(posix, 'setgroups'): posix.setgroups(self.saved_groups) elif hasattr(posix, 'initgroups'): name = pwd.getpwuid(posix.getuid()).pw_name posix.initgroups(name, self.saved_groups[0]) @unittest.skipUnless(hasattr(posix, 'initgroups'), "test needs posix.initgroups()") def test_initgroups(self): # find missing group g = max(self.saved_groups or [0]) + 1 name = pwd.getpwuid(posix.getuid()).pw_name posix.initgroups(name, g) self.assertIn(g, posix.getgroups()) @unittest.skipUnless(hasattr(posix, 'setgroups'), "test needs posix.setgroups()") def test_setgroups(self): for groups in [[0], list(range(16))]: posix.setgroups(groups) self.assertListEqual(groups, posix.getgroups()) def test_main(): try: support.run_unittest(PosixTester, PosixGroupsTester) finally: support.reap_children() if __name__ == '__main__': test_main()