Python os.O_TRUNC属性代码示例

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def store_acs_service_principal(subscription_id, client_secret, service_principal,
                                file_name='acsServicePrincipal.json'):
    obj = {}
    if client_secret:
        obj['client_secret'] = client_secret
    if service_principal:
        obj['service_principal'] = service_principal

    config_path = os.path.join(get_config_dir(), file_name)
    full_config = load_service_principals(config_path=config_path)
    if not full_config:
        full_config = {}
    full_config[subscription_id] = obj

    with os.fdopen(os.open(config_path, os.O_RDWR | os.O_CREAT | os.O_TRUNC, 0o600),
                   'w+') as spFile:
        json.dump(full_config, spFile) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def test_write(self):
        test_filename = "tmp.write.test"
        
        # trivial write
        fd = os.open(test_filename, flags)
        self.assertEqual(os.write(fd, "42"), 2)
        os.close(fd)
        os.unlink(test_filename)

        # write to closed file
        fd = os.open(test_filename, flags)
        os.close(fd)
        self.assertRaisesMessage(OSError, "[Errno 9] Bad file descriptor", os.write, fd, "42")
        os.unlink(test_filename)
        
        # write to file with wrong permissions
        fd = os.open(test_filename, os.O_CREAT | os.O_TRUNC | os.O_RDONLY)
        self.assertRaisesMessage(OSError, "[Errno -2146232800] Can not write to " + test_filename,  os.write, fd, "42")
        os.close(fd)
        os.unlink(test_filename) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def upload_config(self):
        try:
            stream = flask.request.stream
            file_path = cfg.find_config_files(project=CONF.project,
                                              prog=CONF.prog)[0]
            flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
            # mode 00600
            mode = stat.S_IRUSR | stat.S_IWUSR
            with os.fdopen(os.open(file_path, flags, mode), 'wb') as cfg_file:
                b = stream.read(BUFFER)
                while b:
                    cfg_file.write(b)
                    b = stream.read(BUFFER)

            CONF.mutate_config_files()
        except Exception as e:
            LOG.error("Unable to update amphora-agent configuration: "
                      "{}".format(str(e)))
            return webob.Response(json=dict(
                message="Unable to update amphora-agent configuration.",
                details=str(e)), status=500)

        return webob.Response(json={'message': 'OK'}, status=202) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def install_netns_systemd_service():
    os_utils = osutils.BaseOS.get_os_util()

    flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC
    # mode 00644
    mode = (stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)

    # TODO(bcafarel): implement this for other init systems
    # netns handling depends on a separate unit file
    netns_path = os.path.join(consts.SYSTEMD_DIR,
                              consts.AMP_NETNS_SVC_PREFIX + '.service')

    jinja_env = jinja2.Environment(
        autoescape=True, loader=jinja2.FileSystemLoader(os.path.dirname(
            os.path.realpath(__file__)
        ) + consts.AGENT_API_TEMPLATES))

    if not os.path.exists(netns_path):
        with os.fdopen(os.open(netns_path, flags, mode), 'w') as text_file:
            text = jinja_env.get_template(
                consts.AMP_NETNS_SVC_PREFIX + '.systemd.j2').render(
                    amphora_nsname=consts.AMPHORA_NAMESPACE,
                    HasIFUPAll=os_utils.has_ifup_all())
            text_file.write(text) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def write_port_interface_file(self, netns_interface, fixed_ips, mtu,
                                  interface_file_path, template_port):
        # write interface file

        # If we are using a consolidated interfaces file, just append
        # otherwise clear the per interface file as we are rewriting it
        # TODO(johnsom): We need a way to clean out old interfaces records
        if CONF.amphora_agent.agent_server_network_file:
            flags = os.O_WRONLY | os.O_CREAT | os.O_APPEND
        else:
            flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC

        # mode 00644
        mode = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH

        with os.fdopen(os.open(interface_file_path, flags, mode),
                       'w') as text_file:
            text = self._generate_network_file_text(
                netns_interface, fixed_ips, mtu, template_port)
            text_file.write(text) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def store_config(self, config, global_only):
        """Persists locally or globally configuration object.

        Global configuration is updated only when :global_only: is True,
        otherwise, updates are written to local project configuration
        """
        filepath = self.global_config_path if global_only else \
            self.local_config_path

        if global_only:
            os.umask(0)
            fd = os.open(filepath, os.O_CREAT | os.O_RDWR | os.O_TRUNC, 0o600)
            with self.global_config_lock:
                with open(fd, 'w+') as file:
                    config.write(file)
        else:
            with open(filepath, 'w+') as file:
                config.write(file)

        return self.load_config(local_only=True, global_only=True) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def __setitem__(self, key, message):
        """Replace the keyed message; raise KeyError if it doesn't exist."""
        path = os.path.join(self._path, str(key))
        try:
            f = open(path, 'rb+')
        except OSError as e:
            if e.errno == errno.ENOENT:
                raise KeyError('No message with key: %s' % key)
            else:
                raise
        try:
            if self._locked:
                _lock_file(f)
            try:
                os.close(os.open(path, os.O_WRONLY | os.O_TRUNC))
                self._dump_message(message, f)
                if isinstance(message, MHMessage):
                    self._dump_sequences(message, key)
            finally:
                if self._locked:
                    _unlock_file(f)
        finally:
            _sync_close(f) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0o666) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def create_empty_file(filename):
    """Create an empty file. If the file already exists, truncate it."""
    fd = os.open(filename, os.O_WRONLY | os.O_CREAT | os.O_TRUNC)
    os.close(fd) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def __init__(self, name, shape, dtype=np.float32, uuid=""):
        self.shape = shape
        self.dtype = dtype
        size = reduce(lambda x, y: x * y, shape)
        size_bytes = np.dtype(dtype).itemsize * size

        self._mem_path = None
        self._mem_pointer = None
        if os.name == "nt":
            self._mem_path = "/HOLODECK_MEM" + uuid + "_" + name
            self._mem_pointer = mmap.mmap(0, size_bytes, self._mem_path)
        elif os.name == "posix":
            self._mem_path = "/dev/shm/HOLODECK_MEM" + uuid + "_" + name
            f = os.open(self._mem_path, os.O_CREAT | os.O_TRUNC | os.O_RDWR)
            self._mem_file = f
            os.ftruncate(f, size_bytes)
            os.fsync(f)

            # TODO - I think we are leaking a file object here. Unfortunately, we
            #        can't just .close() it since numpy acquires a reference to it
            #        below and I can't find a way to release it in __linux_unlink__()
            self._mem_pointer = mmap.mmap(f, size_bytes)
        else:
            raise HolodeckException("Currently unsupported os: " + os.name)

        self.np_array = np.ndarray(shape, dtype=dtype)
        self.np_array.data = (Shmem._numpy_to_ctype[dtype] * size).from_buffer(self._mem_pointer) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def install_vmprof(name="thread"):

	cpid = multiprocessing.current_process().name
	ctid = threading.current_thread().name
	fname = "vmprof-{}-{}-{}-{}.dat".format(name, cpid, ctid, time.time())


	flags = os.O_RDWR | os.O_CREAT | os.O_TRUNC
	outfd = os.open(fname, flags)
	vmprof.enable(outfd, period=0.01)

	# atexit.register(close_profile_file) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0666) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def set_sequences(self, sequences):
        """Set sequences using the given name-to-key-list dictionary."""
        f = open(os.path.join(self._path, '.mh_sequences'), 'r+')
        try:
            os.close(os.open(f.name, os.O_WRONLY | os.O_TRUNC))
            for name, keys in sequences.iteritems():
                if len(keys) == 0:
                    continue
                f.write('%s:' % name)
                prev = None
                completing = False
                for key in sorted(set(keys)):
                    if key - 1 == prev:
                        if not completing:
                            completing = True
                            f.write('-')
                    elif completing:
                        completing = False
                        f.write('%s %s' % (prev, key))
                    else:
                        f.write(' %s' % key)
                    prev = key
                if completing:
                    f.write(str(prev) + '\n')
                else:
                    f.write('\n')
        finally:
            _sync_close(f) 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def _acquire(self):
        open_mode = os.O_RDWR | os.O_CREAT | os.O_TRUNC

        try:
            fd = os.open(self._lock_file, open_mode)
        except OSError:
            pass
        else:
            try:
                msvcrt.locking(fd, msvcrt.LK_NBLCK, 1)
            except (IOError, OSError):
                os.close(fd)
            else:
                self._lock_file_fd = fd
        return None 

# 需要导入模块: import os [as 别名]
# 或者: from os import O_TRUNC [as 别名]
def write_vip_interface_file(self, interface_file_path,
                                 primary_interface, vip, ip, broadcast,
                                 netmask, gateway, mtu, vrrp_ip, vrrp_version,
                                 render_host_routes, template_vip):
        # write interface file

        mode = stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH

        # If we are using a consolidated interfaces file, just append
        # otherwise clear the per interface file as we are rewriting it
        # TODO(johnsom): We need a way to clean out old interfaces records
        if CONF.amphora_agent.agent_server_network_file:
            flags = os.O_WRONLY | os.O_CREAT | os.O_APPEND
        else:
            flags = os.O_WRONLY | os.O_CREAT | os.O_TRUNC

        with os.fdopen(os.open(interface_file_path, flags, mode),
                       'w') as text_file:
            text = template_vip.render(
                consts=consts,
                interface=primary_interface,
                vip=vip,
                vip_ipv6=ip.version == 6,
                # For ipv6 the netmask is already the prefix
                prefix=(netmask if ip.version == 6
                        else utils.netmask_to_prefix(netmask)),
                broadcast=broadcast,
                netmask=netmask,
                gateway=gateway,
                network=utils.ip_netmask_to_cidr(vip, netmask),
                mtu=mtu,
                vrrp_ip=vrrp_ip,
                vrrp_ipv6=vrrp_version == 6,
                host_routes=render_host_routes,
                topology=CONF.controller_worker.loadbalancer_topology,
            )
            text_file.write(text)