Python stat.S_IRWXU Examples

def close(self):
        error_context.context(
            "Creating unattended install CD image %s" % self.path)
        if os.path.exists(os.path.join(self.mount, 'isolinux')):
            # bootable cdrom
            f = open(os.path.join(self.mount, 'isolinux', 'isolinux.cfg'), 'w')
            f.write('default /isolinux/vmlinuz append initrd=/isolinux/'
                    'initrd.img %s\n' % self.extra_params)
            f.close()
            boot = '-b isolinux/isolinux.bin'
        else:
            # Not a bootable CDROM, using -kernel instead (eg.: arm64)
            boot = ''

        m_cmd = ('mkisofs -o %s %s -c isolinux/boot.cat -no-emul-boot '
                 '-boot-load-size 4 -boot-info-table -f -R -J -V -T %s'
                 % (self.path, boot, self.mount))
        process.run(m_cmd)
        os.chmod(self.path, stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP |
                 stat.S_IROTH | stat.S_IXOTH)
        cleanup(self.mount)
        cleanup(self.source_cdrom)
        logging.debug("unattended install CD image %s successfully created",
                      self.path) 

def get_perf(filename):
    ''' run conlleval.pl perl script to obtain
    precision/recall and F1 score '''
    _conlleval = PREFIX + 'conlleval'
    if not isfile(_conlleval):
        #download('http://www-etud.iro.umontreal.ca/~mesnilgr/atis/conlleval.pl') 
        os.system('wget https://www.comp.nus.edu.sg/%7Ekanmy/courses/practicalNLP_2008/packages/conlleval.pl')
        chmod('conlleval.pl', stat.S_IRWXU) # give the execute permissions
    
    out = []
    proc = subprocess.Popen(["perl", _conlleval], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    stdout, _ = proc.communicate(open(filename).read())
    for line in stdout.split('\n'):
        if 'accuracy' in line:
            out = line.split()
            break
    
    # out = ['accuracy:', '16.26%;', 'precision:', '0.00%;', 'recall:', '0.00%;', 'FB1:', '0.00']
    precision = float(out[3][:-2])
    recall    = float(out[5][:-2])
    f1score   = float(out[7])

    return {'p':precision, 'r':recall, 'f1':f1score} 

def gunzip_file(gz_path, new_path):
  """Unzips from gz_path into new_path.

  Args:
    gz_path: path to the zipped file.
    new_path: path to where the file will be unzipped.
  """
  if tf.gfile.Exists(new_path):
    tf.logging.info("File %s already exists, skipping unpacking" % new_path)
    return
  tf.logging.info("Unpacking %s to %s" % (gz_path, new_path))
  # We may be unpacking into a newly created directory, add write mode.
  mode = stat.S_IRWXU or stat.S_IXGRP or stat.S_IRGRP or stat.S_IROTH
  os.chmod(os.path.dirname(new_path), mode)
  with gzip.open(gz_path, "rb") as gz_file:
    with tf.gfile.GFile(new_path, mode="wb") as new_file:
      for line in gz_file:
        new_file.write(line) 

def test_world_permissions_not_reset_if_other_files_exist(self):
        """
        If files exist in the filesystem, permissions are not reset when the
        filesystem is remounted.
        """
        mountpoint = mountroot_for_test(self).child(b"mount-test")
        scenario = self._run_success_test(mountpoint)
        mountpoint.child(b"file").setContent(b"stuff")
        check_call([b"umount", mountpoint.path])
        mountpoint.chmod(S_IRWXU)
        mountpoint.restat()
        self.successResultOf(run_state_change(
            scenario.state_change(),
            scenario.deployer, InMemoryStatePersister()))
        self.assertEqual(mountpoint.getPermissions().shorthand(),
                         'rwx------') 

def _ensure_empty_directory(path):
    """
    The path should not exist or it should be an empty directory.
    If the path does not exist then a new directory is created.

    :param FilePath path: The directory path to check or create.
    """
    if path.exists():
        if not path.isdir():
            raise UsageError("{} is not a directory".format(path.path))
        if path.listdir():
            raise UsageError("{} is not empty".format(path.path))
        return

    try:
        path.makedirs()
        path.chmod(stat.S_IRWXU)
    except OSError as e:
        raise UsageError(
            "Can not create {}. {}: {}.".format(path.path, e.filename,
                                                e.strerror)
        ) 

def test_copy_symlinks(self):
        tmp_dir = self.mkdtemp()
        src = os.path.join(tmp_dir, 'foo')
        dst = os.path.join(tmp_dir, 'bar')
        src_link = os.path.join(tmp_dir, 'baz')
        write_file(src, 'foo')
        os.symlink(src, src_link)
        if hasattr(os, 'lchmod'):
            os.lchmod(src_link, stat.S_IRWXU | stat.S_IRWXO)
        # don't follow
        shutil.copy(src_link, dst, follow_symlinks=True)
        self.assertFalse(os.path.islink(dst))
        self.assertEqual(read_file(src), read_file(dst))
        os.remove(dst)
        # follow
        shutil.copy(src_link, dst, follow_symlinks=False)
        self.assertTrue(os.path.islink(dst))
        self.assertEqual(os.readlink(dst), os.readlink(src_link))
        if hasattr(os, 'lchmod'):
            self.assertEqual(os.lstat(src_link).st_mode,
                             os.lstat(dst).st_mode) 

def gunzip_file(gz_path, new_path):
  """Unzips from gz_path into new_path.

  Args:
    gz_path: path to the zipped file.
    new_path: path to where the file will be unzipped.
  """
  if tf.gfile.Exists(new_path):
    tf.logging.info("File %s already exists, skipping unpacking" % new_path)
    return
  tf.logging.info("Unpacking %s to %s" % (gz_path, new_path))
  # We may be unpacking into a newly created directory, add write mode.
  mode = stat.S_IRWXU or stat.S_IXGRP or stat.S_IRGRP or stat.S_IROTH
  os.chmod(os.path.dirname(new_path), mode)
  with gzip.open(gz_path, "rb") as gz_file:
    with tf.gfile.GFile(new_path, mode="wb") as new_file:
      for line in gz_file:
        new_file.write(line) 

def gunzip_file(gz_path, new_path):
  """Unzips from gz_path into new_path.

  Args:
    gz_path: path to the zipped file.
    new_path: path to where the file will be unzipped.
  """
  if tf.gfile.Exists(new_path):
    tf.logging.info("File %s already exists, skipping unpacking" % new_path)
    return
  tf.logging.info("Unpacking %s to %s" % (gz_path, new_path))
  # We may be unpacking into a newly created directory, add write mode.
  mode = stat.S_IRWXU or stat.S_IXGRP or stat.S_IRGRP or stat.S_IROTH
  os.chmod(os.path.dirname(new_path), mode)
  with gzip.open(gz_path, "rb") as gz_file:
    with tf.gfile.GFile(new_path, mode="wb") as new_file:
      for line in gz_file:
        new_file.write(line) 

def gunzip_file(gz_path, new_path):
  """Unzips from gz_path into new_path.

  Args:
    gz_path: path to the zipped file.
    new_path: path to where the file will be unzipped.
  """
  if tf.gfile.Exists(new_path):
    tf.logging.info("File %s already exists, skipping unpacking" % new_path)
    return
  tf.logging.info("Unpacking %s to %s" % (gz_path, new_path))
  # We may be unpacking into a newly created directory, add write mode.
  mode = stat.S_IRWXU or stat.S_IXGRP or stat.S_IRGRP or stat.S_IROTH
  os.chmod(os.path.dirname(new_path), mode)
  with gzip.open(gz_path, "rb") as gz_file:
    with tf.gfile.GFile(new_path, mode="wb") as new_file:
      for line in gz_file:
        new_file.write(line) 

def get_sudo_user_group_mode():
    '''TBW'''
    # XXX only need uid, gid, and file mode for sudo case...
    new_uid = int(os.environ.get('SUDO_UID'))
    if new_uid is None:
        error('Unable to obtain SUDO_UID')
        return False
    #debug('new UID via SUDO_UID: ' + str(new_uid))
    new_gid = int(os.environ.get('SUDO_GID'))
    if new_gid is None:
        error('Unable to obtain SUDO_GID')
        return False
    #debug('new GID via SUDO_GID: ' + str(new_gid))
    # new_dir_mode = (stat.S_IRUSR|stat.S_IWUSR|stat.S_IRGRP|stat.S_IWGRP|stat.S_IROTH|stat.S_IWOTH)
    rwx_mode = (stat.S_IRWXU|stat.S_IRWXG|stat.S_IRWXO)
    new_dir_mode = rwx_mode
    #debug('new dir mode: ' + str(new_dir_mode))
    return (new_dir_mode, new_uid, new_gid) 

def env(self, tmpdir):
        """
        Create a package environment, similar to a virtualenv,
        in which packages are installed.
        """

        class Environment(str):
            pass

        env = Environment(tmpdir)
        tmpdir.chmod(stat.S_IRWXU)
        subs = 'home', 'lib', 'scripts', 'data', 'egg-base'
        env.paths = dict(
            (dirname, str(tmpdir / dirname))
            for dirname in subs
        )
        list(map(os.mkdir, env.paths.values()))
        return env 

def rmtree(path, ignore_errors=False, onerror=None):
    """Same as shutil.rmtree, but supports directories without write or execute permissions."""
    if ignore_errors:

        def onerror(*args):
            pass

    elif onerror is None:

        def onerror(*args):
            raise

    for root, dirs, _unused_files in os.walk(path):
        for directory in dirs:
            try:
                abs_directory = os.path.join(root, directory)
                os.chmod(abs_directory, stat.S_IRWXU)
            except OSError as e:
                onerror(os.chmod, abs_directory, e)
    shutil.rmtree(path, ignore_errors=ignore_errors, onerror=onerror) 

def test_copy2_symlinks(self):
        tmp_dir = self.mkdtemp()
        src = os.path.join(tmp_dir, 'foo')
        dst = os.path.join(tmp_dir, 'bar')
        src_link = os.path.join(tmp_dir, 'baz')
        write_file(src, 'foo')
        os.symlink(src, src_link)
        if hasattr(os, 'lchmod'):
            os.lchmod(src_link, stat.S_IRWXU | stat.S_IRWXO)
        if hasattr(os, 'lchflags') and hasattr(stat, 'UF_NODUMP'):
            os.lchflags(src_link, stat.UF_NODUMP)
        src_stat = os.stat(src)
        src_link_stat = os.lstat(src_link)
        # follow
        shutil.copy2(src_link, dst, follow_symlinks=True)
        self.assertFalse(os.path.islink(dst))
        self.assertEqual(read_file(src), read_file(dst))
        os.remove(dst)
        # don't follow
        shutil.copy2(src_link, dst, follow_symlinks=False)
        self.assertTrue(os.path.islink(dst))
        self.assertEqual(os.readlink(dst), os.readlink(src_link))
        dst_stat = os.lstat(dst)
        if os.utime in os.supports_follow_symlinks:
            for attr in 'st_atime', 'st_mtime':
                # The modification times may be truncated in the new file.
                self.assertLessEqual(getattr(src_link_stat, attr),
                                     getattr(dst_stat, attr) + 1)
        if hasattr(os, 'lchmod'):
            self.assertEqual(src_link_stat.st_mode, dst_stat.st_mode)
            self.assertNotEqual(src_stat.st_mode, dst_stat.st_mode)
        if hasattr(os, 'lchflags') and hasattr(src_link_stat, 'st_flags'):
            self.assertEqual(src_link_stat.st_flags, dst_stat.st_flags) 

def remove_execute_access_from_group_and_other_users(location):
    os.chmod(location, stat.S_IRWXU | stat.S_IRGRP | stat.S_IROTH) 

def test__read_output(self):
        if self.env['PATH']:
            self.env['PATH'] = self.env['PATH'] + ':'
        self.env['PATH'] = self.env['PATH'] + os.path.abspath(self.temp_path_dir)
        test.support.unlink(self.prog_name)
        self.addCleanup(test.support.unlink, self.prog_name)
        with open(self.prog_name, 'w') as f:
            f.write("#!/bin/sh\n/bin/echo ExpectedOutput\n")
        os.chmod(self.prog_name, stat.S_IRWXU)
        self.assertEqual('ExpectedOutput',
                            _osx_support._read_output(self.prog_name)) 

def test__find_appropriate_compiler(self):
        compilers = (
                        ('gcc-test', 'i686-apple-darwin11-llvm-gcc-4.2'),
                        ('clang', 'clang version 3.1'),
                    )
        config_vars = {
        'CC': 'gcc-test -pthreads',
        'CXX': 'cc++-test',
        'CFLAGS': '-fno-strict-aliasing  -g -O3 -arch ppc -arch i386  ',
        'LDFLAGS': '-arch ppc -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'gcc-test -bundle -arch ppc -arch i386 -g',
        'LDSHARED': 'gcc-test -bundle -arch ppc -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        expected_vars = {
        'CC': 'clang -pthreads',
        'CXX': 'clang++',
        'CFLAGS': '-fno-strict-aliasing  -g -O3 -arch ppc -arch i386  ',
        'LDFLAGS': '-arch ppc -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'clang -bundle -arch ppc -arch i386 -g',
        'LDSHARED': 'clang -bundle -arch ppc -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        self.add_expected_saved_initial_values(config_vars, expected_vars)

        suffix = (':' + self.env['PATH']) if self.env['PATH'] else ''
        self.env['PATH'] = os.path.abspath(self.temp_path_dir) + suffix
        for c_name, c_output in compilers:
            test.support.unlink(c_name)
            self.addCleanup(test.support.unlink, c_name)
            with open(c_name, 'w') as f:
                f.write("#!/bin/sh\n/bin/echo " + c_output)
            os.chmod(c_name, stat.S_IRWXU)
        self.assertEqual(expected_vars,
                            _osx_support._find_appropriate_compiler(
                                    config_vars)) 

def test__remove_unsupported_archs(self):
        config_vars = {
        'CC': 'clang',
        'CFLAGS': '-fno-strict-aliasing  -g -O3 -arch ppc -arch i386  ',
        'LDFLAGS': '-arch ppc -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'gcc-4.0 -bundle  -arch ppc -arch i386 -g',
        'LDSHARED': 'gcc-4.0 -bundle  -arch ppc -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        expected_vars = {
        'CC': 'clang',
        'CFLAGS': '-fno-strict-aliasing  -g -O3  -arch i386  ',
        'LDFLAGS': ' -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'gcc-4.0 -bundle   -arch i386 -g',
        'LDSHARED': 'gcc-4.0 -bundle   -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        self.add_expected_saved_initial_values(config_vars, expected_vars)

        suffix = (':' + self.env['PATH']) if self.env['PATH'] else ''
        self.env['PATH'] = os.path.abspath(self.temp_path_dir) + suffix
        c_name = 'clang'
        test.support.unlink(c_name)
        self.addCleanup(test.support.unlink, c_name)
        # exit status 255 means no PPC support in this compiler chain
        with open(c_name, 'w') as f:
            f.write("#!/bin/sh\nexit 255")
        os.chmod(c_name, stat.S_IRWXU)
        self.assertEqual(expected_vars,
                            _osx_support._remove_unsupported_archs(
                                    config_vars)) 

def test_copymode_symlink_to_symlink(self):
        tmp_dir = self.mkdtemp()
        src = os.path.join(tmp_dir, 'foo')
        dst = os.path.join(tmp_dir, 'bar')
        src_link = os.path.join(tmp_dir, 'baz')
        dst_link = os.path.join(tmp_dir, 'quux')
        write_file(src, 'foo')
        write_file(dst, 'foo')
        os.symlink(src, src_link)
        os.symlink(dst, dst_link)
        os.chmod(src, stat.S_IRWXU|stat.S_IRWXG)
        os.chmod(dst, stat.S_IRWXU)
        os.lchmod(src_link, stat.S_IRWXO|stat.S_IRWXG)
        # link to link
        os.lchmod(dst_link, stat.S_IRWXO)
        shutil.copymode(src_link, dst_link, follow_symlinks=False)
        self.assertEqual(os.lstat(src_link).st_mode,
                         os.lstat(dst_link).st_mode)
        self.assertNotEqual(os.stat(src).st_mode, os.stat(dst).st_mode)
        # src link - use chmod
        os.lchmod(dst_link, stat.S_IRWXO)
        shutil.copymode(src_link, dst, follow_symlinks=False)
        self.assertEqual(os.stat(src).st_mode, os.stat(dst).st_mode)
        # dst link - use chmod
        os.lchmod(dst_link, stat.S_IRWXO)
        shutil.copymode(src, dst_link, follow_symlinks=False)
        self.assertEqual(os.stat(src).st_mode, os.stat(dst).st_mode) 

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) 

def run(self, deployer, state_persister):
        """
        Run the system ``mount`` tool to mount this change's volume's block
        device.  The volume must be attached to this node.
        """
        # Create the directory where a device will be mounted.
        # The directory's parent's permissions will be set to only allow access
        # by owner, to limit access by other users on the node.
        try:
            self.mountpoint.makedirs()
        except OSError as e:
            if e.errno != EEXIST:
                return fail()
        self.mountpoint.parent().chmod(S_IRWXU)

        # This should be asynchronous.  FLOC-1797
        deployer.block_device_manager.mount(self.device_path, self.mountpoint)

        # Remove lost+found to ensure filesystems always start out empty.
        # Mounted filesystem is also made world
        # writeable/readable/executable since we can't predict what user a
        # container will run as.  We make sure we change mounted
        # filesystem's root directory permissions, so we only do this
        # after the filesystem is mounted.  If other files exist we don't
        # bother with either change, since at that point user has modified
        # the volume and we don't want to undo their changes by mistake
        # (e.g. postgres doesn't like world-writeable directories once
        # it's initialized).

        # A better way is described in
        # https://clusterhq.atlassian.net/browse/FLOC-2074
        lostfound = self.mountpoint.child(b"lost+found")
        if self.mountpoint.children() == [lostfound]:
            lostfound.remove()
            self.mountpoint.chmod(S_IRWXU | S_IRWXG | S_IRWXO)
            self.mountpoint.restat()

        return succeed(None) 

def _make_public(self, filesystem):
        """
        Make a filesystem publically readable/writeable/executable.

        A better alternative will be implemented in
        https://clusterhq.atlassian.net/browse/FLOC-34

        :param filesystem: A ``IFilesystem`` provider.
        """
        filesystem.get_path().chmod(
            # 0o777 the long way:
            stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO) 

def test_chmod(sftp_client, tmp_dir):
    test_file = os.path.join(tmp_dir, "foo")
    open(test_file, "w").write("X")
    sftp_client.chmod(test_file, 0o600)
    st = os.stat(test_file)
    check_bits = stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO
    assert st.st_mode & check_bits == 0o600 

def set_all_unrestricted_permissions(location):
    """
    Set permissions so that user, group, and others all have read,
    write and execute permissions (chmod 777).
    :param location: Full location of either a folder or a location
    """
    os.chmod(location, stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO) 

def _install_service(self):
        daemon_files = [
            ['daemon.in', '/etc/init.d/teleport'],
            ['start.sh.in', os.path.join(self._install_path, 'start.sh')],
            ['stop.sh.in', os.path.join(self._install_path, 'stop.sh')],
            ['status.sh.in', os.path.join(self._install_path, 'status.sh')],
        ]

        for _d in daemon_files:
            cc.v('process [{}] to [{}]'.format(_d[0], _d[1]))
            _orig_file = os.path.join(env.root_path, 'daemon', _d[0])
            with open(_orig_file, 'r') as f:
                _text = f.read()
                _text = _text.format(daemon_path=self._install_path)

            with open(_d[1], 'w') as f:
                f.write(_text)

            if not os.path.exists(_d[1]):
                raise RuntimeError('can not generate daemon file [{}].'.format(_d[1]))

            # owner: RWX, group: RX, others: RX
            os.chmod(_d[1], stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)

        # create symbolic link
        os.symlink('/etc/init.d/teleport', '/etc/rc2.d/S95teleport')
        os.symlink('/etc/init.d/teleport', '/etc/rc3.d/S95teleport')
        os.symlink('/etc/init.d/teleport', '/etc/rc4.d/S95teleport')
        os.symlink('/etc/init.d/teleport', '/etc/rc5.d/S95teleport') 

def test_generate_key(self, cli, tmpdir):
        keyfile = tmpdir.join('keyfile.key')
        await cli('generate', str(keyfile))

        # Check length
        key = binascii.unhexlify(keyfile.read())
        assert len(key) == 32

        # Check permissions
        stat_result = os.stat(str(keyfile))
        permissions = stat_result.st_mode
        assert permissions & stat.S_IRWXU == stat.S_IRUSR | stat.S_IWUSR 

def startDB(self):
        import kinterbasdb
        self.DB_NAME = os.path.join(self.DB_DIR, DBTestConnector.DB_NAME)
        os.chmod(self.DB_DIR, stat.S_IRWXU + stat.S_IRWXG + stat.S_IRWXO)
        sql = 'create database "%s" user "%s" password "%s"'
        sql %= (self.DB_NAME, self.DB_USER, self.DB_PASS);
        conn = kinterbasdb.create_database(sql)
        conn.close() 

def set_write_bit(fn):
    # type: (str) -> None
    """
    Set read-write permissions for the current user on the target path.  Fail silently
    if the path doesn't exist.

    :param str fn: The target filename or path
    :return: None
    """

    if not os.path.exists(fn):
        return
    file_stat = os.stat(fn).st_mode
    os.chmod(fn, file_stat | stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
    if not os.path.isdir(fn):
        for path in [fn, os.path.dirname(fn)]:
            try:
                os.chflags(path, 0)
            except AttributeError:
                pass
        return None
    for root, dirs, files in os.walk(fn, topdown=False):
        for dir_ in [os.path.join(root, d) for d in dirs]:
            set_write_bit(dir_)
        for file_ in [os.path.join(root, f) for f in files]:
            set_write_bit(file_) 

def test__find_appropriate_compiler(self):
        compilers = (
                        ('gcc-test', 'i686-apple-darwin11-llvm-gcc-4.2'),
                        ('clang', 'clang version 3.1'),
                    )
        config_vars = {
        'CC': 'gcc-test -pthreads',
        'CXX': 'cc++-test',
        'CFLAGS': '-fno-strict-aliasing  -g -O3 -arch ppc -arch i386  ',
        'LDFLAGS': '-arch ppc -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'gcc-test -bundle -arch ppc -arch i386 -g',
        'LDSHARED': 'gcc-test -bundle -arch ppc -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        expected_vars = {
        'CC': 'clang -pthreads',
        'CXX': 'clang++',
        'CFLAGS': '-fno-strict-aliasing  -g -O3 -arch ppc -arch i386  ',
        'LDFLAGS': '-arch ppc -arch i386   -g',
        'CPPFLAGS': '-I. -isysroot /Developer/SDKs/MacOSX10.4u.sdk',
        'BLDSHARED': 'clang -bundle -arch ppc -arch i386 -g',
        'LDSHARED': 'clang -bundle -arch ppc -arch i386 '
                        '-isysroot /Developer/SDKs/MacOSX10.4u.sdk -g',
        }
        self.add_expected_saved_initial_values(config_vars, expected_vars)

        suffix = (':' + self.env['PATH']) if self.env['PATH'] else ''
        self.env['PATH'] = os.path.abspath(self.temp_path_dir) + suffix
        for c_name, c_output in compilers:
            test.test_support.unlink(c_name)
            self.addCleanup(test.test_support.unlink, c_name)
            with open(c_name, 'w') as f:
                f.write("#!/bin/sh\n/bin/echo " + c_output)
            os.chmod(c_name, stat.S_IRWXU)
        self.assertEqual(expected_vars,
                            _osx_support._find_appropriate_compiler(
                                    config_vars)) 

def test__read_output(self):
        if self.env['PATH']:
            self.env['PATH'] = self.env['PATH'] + ':'
        self.env['PATH'] = self.env['PATH'] + os.path.abspath(self.temp_path_dir)
        test.test_support.unlink(self.prog_name)
        self.addCleanup(test.test_support.unlink, self.prog_name)
        with open(self.prog_name, 'w') as f:
            f.write("#!/bin/sh\n/bin/echo ExpectedOutput\n")
        os.chmod(self.prog_name, stat.S_IRWXU)
        self.assertEqual('ExpectedOutput',
                            _osx_support._read_output(self.prog_name)) 

def test__find_executable(self):
        if self.env['PATH']:
            self.env['PATH'] = self.env['PATH'] + ':'
        self.env['PATH'] = self.env['PATH'] + os.path.abspath(self.temp_path_dir)
        test.test_support.unlink(self.prog_name)
        self.assertIsNone(_osx_support._find_executable(self.prog_name))
        self.addCleanup(test.test_support.unlink, self.prog_name)
        with open(self.prog_name, 'w') as f:
            f.write("#!/bin/sh\n/bin/echo OK\n")
        os.chmod(self.prog_name, stat.S_IRWXU)
        self.assertEqual(self.prog_name,
                            _osx_support._find_executable(self.prog_name))