# Copyright (c) 2012 Terence Honles (maintainer) # Copyright (c) 2008 Giorgos Verigakis (author) # # Permission to use, copy, modify, and distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. from __future__ import print_function, absolute_import, division import ctypes import errno import logging import os import warnings from ctypes.util import find_library from platform import machine, system from signal import signal, SIGINT, SIG_DFL from stat import S_IFDIR from traceback import print_exc from functools import partial basestring = str log = logging.getLogger("fuse") _system = system() _machine = machine() if _system == 'Windows': import sys if sys.maxsize > 0xffffffff: c_win_long = ctypes.c_int64 c_win_ulong = ctypes.c_uint64 else: c_win_long = ctypes.c_int32 c_win_ulong = ctypes.c_uint32 if _system == 'Windows' or _system.startswith('CYGWIN'): class c_timespec(ctypes.Structure): _fields_ = [('tv_sec', c_win_long), ('tv_nsec', c_win_long)] else: class c_timespec(ctypes.Structure): _fields_ = [('tv_sec', ctypes.c_long), ('tv_nsec', ctypes.c_long)] class c_utimbuf(ctypes.Structure): _fields_ = [('actime', c_timespec), ('modtime', c_timespec)] class c_stat(ctypes.Structure): pass _libfuse_path = os.environ.get('FUSE_LIBRARY_PATH') if not _libfuse_path: if _system == 'Darwin': _libiconv = ctypes.CDLL(find_library('iconv'), ctypes.RTLD_GLOBAL) _libfuse_path = (find_library('fuse4x') or find_library('osxfuse') or find_library('fuse')) elif _system == 'Windows': try: import _winreg as reg except ImportError: import winreg as reg def Reg32GetValue(rootkey, keyname, valname): key, val = None, None try: key = reg.OpenKey(rootkey, keyname, 0, reg.KEY_READ | reg.KEY_WOW64_32KEY) val = str(reg.QueryValueEx(key, valname)[0]) except WindowsError: pass finally: if key is not None: reg.CloseKey(key) return val _libfuse_path = Reg32GetValue(reg.HKEY_LOCAL_MACHINE, r"SOFTWARE\WinFsp", r"InstallDir") if _libfuse_path: _libfuse_path += r"bin\winfsp-%s.dll" % ("x64" if sys.maxsize > 0xffffffff else "x86") else: _libfuse_path = find_library('fuse') if not _libfuse_path: raise EnvironmentError('Unable to find libfuse') else: _libfuse = ctypes.CDLL(_libfuse_path) if _system == 'Darwin' and hasattr(_libfuse, 'macfuse_version'): _system = 'Darwin-MacFuse' if _system in ('Darwin', 'Darwin-MacFuse', 'FreeBSD'): ENOTSUP = 45 c_dev_t = ctypes.c_int32 c_fsblkcnt_t = ctypes.c_ulong c_fsfilcnt_t = ctypes.c_ulong c_gid_t = ctypes.c_uint32 c_mode_t = ctypes.c_uint16 c_off_t = ctypes.c_int64 c_pid_t = ctypes.c_int32 c_uid_t = ctypes.c_uint32 setxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, ctypes.c_int, ctypes.c_uint32) getxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, ctypes.c_uint32) if _system == 'Darwin': c_stat._fields_ = [ ('st_dev', c_dev_t), ('st_mode', c_mode_t), ('st_nlink', ctypes.c_uint16), ('st_ino', ctypes.c_uint64), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('st_rdev', c_dev_t), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec), ('st_birthtimespec', c_timespec), ('st_size', c_off_t), ('st_blocks', ctypes.c_int64), ('st_blksize', ctypes.c_int32), ('st_flags', ctypes.c_int32), ('st_gen', ctypes.c_int32), ('st_lspare', ctypes.c_int32), ('st_qspare', ctypes.c_int64)] else: c_stat._fields_ = [ ('st_dev', c_dev_t), ('st_ino', ctypes.c_uint32), ('st_mode', c_mode_t), ('st_nlink', ctypes.c_uint16), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('st_rdev', c_dev_t), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec), ('st_size', c_off_t), ('st_blocks', ctypes.c_int64), ('st_blksize', ctypes.c_int32)] elif _system == 'Linux': ENOTSUP = 95 c_dev_t = ctypes.c_ulonglong c_fsblkcnt_t = ctypes.c_ulonglong c_fsfilcnt_t = ctypes.c_ulonglong c_gid_t = ctypes.c_uint c_mode_t = ctypes.c_uint c_off_t = ctypes.c_longlong c_pid_t = ctypes.c_int c_uid_t = ctypes.c_uint setxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, ctypes.c_int) getxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t) if _machine == 'x86_64': c_stat._fields_ = [ ('st_dev', c_dev_t), ('st_ino', ctypes.c_ulong), ('st_nlink', ctypes.c_ulong), ('st_mode', c_mode_t), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('__pad0', ctypes.c_int), ('st_rdev', c_dev_t), ('st_size', c_off_t), ('st_blksize', ctypes.c_long), ('st_blocks', ctypes.c_long), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec)] elif _machine == 'aarch64': c_stat._fields_ = [ ('st_dev', c_dev_t), ('st_ino', ctypes.c_ulong), ('st_mode', c_mode_t), ('st_nlink', ctypes.c_uint), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('st_rdev', c_dev_t), ('__pad1', ctypes.c_ulong), ('st_size', c_off_t), ('st_blksize', ctypes.c_int), ('__pad2', ctypes.c_int), ('st_blocks', ctypes.c_long), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec)] else: c_stat._fields_ = [ ('st_dev', c_dev_t), ('__pad1', ctypes.c_ushort), ('__st_ino', ctypes.c_ulong), ('st_mode', c_mode_t), ('st_nlink', ctypes.c_uint), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('st_rdev', c_dev_t), ('__pad2', ctypes.c_ushort), ('st_size', c_off_t), ('st_blksize', ctypes.c_long), ('st_blocks', ctypes.c_longlong), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec), ('st_ino', ctypes.c_ulonglong)] elif _system == 'Windows' or _system.startswith('CYGWIN'): ENOTSUP = 129 if _system == 'Windows' else 134 c_dev_t = ctypes.c_uint c_fsblkcnt_t = c_win_ulong c_fsfilcnt_t = c_win_ulong c_gid_t = ctypes.c_uint c_mode_t = ctypes.c_uint c_off_t = ctypes.c_longlong c_pid_t = ctypes.c_int c_uid_t = ctypes.c_uint setxattr_t = ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, ctypes.c_int) getxattr_t = ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t) c_stat._fields_ = [ ('st_dev', c_dev_t), ('st_ino', ctypes.c_ulonglong), ('st_mode', c_mode_t), ('st_nlink', ctypes.c_ushort), ('st_uid', c_uid_t), ('st_gid', c_gid_t), ('st_rdev', c_dev_t), ('st_size', c_off_t), ('st_atimespec', c_timespec), ('st_mtimespec', c_timespec), ('st_ctimespec', c_timespec), ('st_blksize', ctypes.c_int), ('st_blocks', ctypes.c_longlong), ('st_birthtimespec', c_timespec)] else: raise NotImplementedError('%s is not supported.' % _system) if _system == 'FreeBSD': c_fsblkcnt_t = ctypes.c_uint64 c_fsfilcnt_t = ctypes.c_uint64 setxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, ctypes.c_int) getxattr_t = ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t) class c_statvfs(ctypes.Structure): _fields_ = [ ('f_bavail', c_fsblkcnt_t), ('f_bfree', c_fsblkcnt_t), ('f_blocks', c_fsblkcnt_t), ('f_favail', c_fsfilcnt_t), ('f_ffree', c_fsfilcnt_t), ('f_files', c_fsfilcnt_t), ('f_bsize', ctypes.c_ulong), ('f_flag', ctypes.c_ulong), ('f_frsize', ctypes.c_ulong)] elif _system == 'Windows' or _system.startswith('CYGWIN'): class c_statvfs(ctypes.Structure): _fields_ = [ ('f_bsize', c_win_ulong), ('f_frsize', c_win_ulong), ('f_blocks', c_fsblkcnt_t), ('f_bfree', c_fsblkcnt_t), ('f_bavail', c_fsblkcnt_t), ('f_files', c_fsfilcnt_t), ('f_ffree', c_fsfilcnt_t), ('f_favail', c_fsfilcnt_t), ('f_fsid', c_win_ulong), ('f_flag', c_win_ulong), ('f_namemax', c_win_ulong)] else: class c_statvfs(ctypes.Structure): _fields_ = [ ('f_bsize', ctypes.c_ulong), ('f_frsize', ctypes.c_ulong), ('f_blocks', c_fsblkcnt_t), ('f_bfree', c_fsblkcnt_t), ('f_bavail', c_fsblkcnt_t), ('f_files', c_fsfilcnt_t), ('f_ffree', c_fsfilcnt_t), ('f_favail', c_fsfilcnt_t), ('f_fsid', ctypes.c_ulong), ('f_flag', ctypes.c_ulong), ('f_namemax', ctypes.c_ulong)] if _system == 'Windows' or _system.startswith('CYGWIN'): class fuse_file_info(ctypes.Structure): _fields_ = [ ('flags', ctypes.c_int), ('fh_old', ctypes.c_int), ('writepage', ctypes.c_int), ('direct_io', ctypes.c_uint, 1), ('keep_cache', ctypes.c_uint, 1), ('flush', ctypes.c_uint, 1), ('padding', ctypes.c_uint, 29), ('fh', ctypes.c_uint64), ('lock_owner', ctypes.c_uint64)] else: class fuse_file_info(ctypes.Structure): _fields_ = [ ('flags', ctypes.c_int), ('fh_old', ctypes.c_ulong), ('writepage', ctypes.c_int), ('direct_io', ctypes.c_uint, 1), ('keep_cache', ctypes.c_uint, 1), ('flush', ctypes.c_uint, 1), ('nonseekable', ctypes.c_uint, 1), ('flock_release', ctypes.c_uint, 1), ('padding', ctypes.c_uint, 27), ('fh', ctypes.c_uint64), ('lock_owner', ctypes.c_uint64)] class fuse_context(ctypes.Structure): _fields_ = [ ('fuse', ctypes.c_voidp), ('uid', c_uid_t), ('gid', c_gid_t), ('pid', c_pid_t), ('private_data', ctypes.c_voidp)] _libfuse.fuse_get_context.restype = ctypes.POINTER(fuse_context) class fuse_operations(ctypes.Structure): _fields_ = [ ('getattr', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(c_stat))), ('readlink', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t)), ('getdir', ctypes.c_voidp), ('mknod', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, c_mode_t, c_dev_t)), ('mkdir', ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p, c_mode_t)), ('unlink', ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p)), ('rmdir', ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p)), ('symlink', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p)), ('rename', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p)), ('link', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p)), ('chmod', ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_char_p, c_mode_t)), ('chown', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, c_uid_t, c_gid_t)), ('truncate', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, c_off_t)), ('utime', ctypes.c_voidp), ('open', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info))), ('read', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, c_off_t, ctypes.POINTER(fuse_file_info))), ('write', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t, c_off_t, ctypes.POINTER(fuse_file_info))), ('statfs', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(c_statvfs))), ('flush', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info))), ('release', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info))), ('fsync', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_int, ctypes.POINTER(fuse_file_info))), ('setxattr', setxattr_t), ('getxattr', getxattr_t), ('listxattr', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_byte), ctypes.c_size_t)), ('removexattr', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p)), ('opendir', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info))), ('readdir', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_voidp, ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_voidp, ctypes.c_char_p, ctypes.POINTER(c_stat), c_off_t), c_off_t, ctypes.POINTER(fuse_file_info))), ('releasedir', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info))), ('fsyncdir', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_int, ctypes.POINTER(fuse_file_info))), ('init', ctypes.CFUNCTYPE(ctypes.c_voidp, ctypes.c_voidp)), ('destroy', ctypes.CFUNCTYPE(ctypes.c_voidp, ctypes.c_voidp)), ('access', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_int)), ('create', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, c_mode_t, ctypes.POINTER(fuse_file_info))), ('ftruncate', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, c_off_t, ctypes.POINTER(fuse_file_info))), ('fgetattr', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(c_stat), ctypes.POINTER(fuse_file_info))), ('lock', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(fuse_file_info), ctypes.c_int, ctypes.c_voidp)), ('utimens', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(c_utimbuf))), ('bmap', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_size_t, ctypes.POINTER(ctypes.c_ulonglong))), ('flag_nullpath_ok', ctypes.c_uint, 1), ('flag_nopath', ctypes.c_uint, 1), ('flag_utime_omit_ok', ctypes.c_uint, 1), ('flag_reserved', ctypes.c_uint, 29), ('ioctl', ctypes.CFUNCTYPE( ctypes.c_int, ctypes.c_char_p, ctypes.c_uint, ctypes.c_void_p, ctypes.POINTER(fuse_file_info), ctypes.c_uint, ctypes.c_void_p)), ] def time_of_timespec(ts, use_ns=False): if use_ns: return ts.tv_sec * 10 ** 9 + ts.tv_nsec else: return ts.tv_sec + ts.tv_nsec / 1E9 def set_st_attrs(st, attrs, use_ns=False): for key, val in attrs.items(): if key in ('st_atime', 'st_mtime', 'st_ctime', 'st_birthtime'): timespec = getattr(st, key + 'spec', None) if timespec is None: continue if use_ns: timespec.tv_sec, timespec.tv_nsec = divmod(int(val), 10 ** 9) else: timespec.tv_sec = int(val) timespec.tv_nsec = int((val - timespec.tv_sec) * 1E9) elif hasattr(st, key): setattr(st, key, val) def fuse_get_context(): "a" ctxp = _libfuse.fuse_get_context() ctx = ctxp.contents return ctx.uid, ctx.gid, ctx.pid def fuse_exit(): "a" fuse_ptr = ctypes.c_void_p(_libfuse.fuse_get_context().contents.fuse) _libfuse.fuse_exit(fuse_ptr) class FuseOSError(OSError): def __init__(self, errno): super(FuseOSError, self).__init__(errno, os.strerror(errno)) class FUSE(object): "a" OPTIONS = ( ('foreground', '-f'), ('debug', '-d'), ('nothreads', '-s'), ) def __init__(self, operations, mountpoint, raw_fi=False, encoding='utf-8', **kwargs): "a" self.operations = operations self.raw_fi = raw_fi self.encoding = encoding self.__critical_exception = None self.use_ns = getattr(operations, 'use_ns', False) args = ['fuse'] args.extend(flag for arg, flag in self.OPTIONS if kwargs.pop(arg, False)) kwargs.setdefault('fsname', operations.__class__.__name__) args.append('-o') args.append(','.join(self._normalize_fuse_options(**kwargs))) args.append(mountpoint) args = [arg.encode(encoding) for arg in args] argv = (ctypes.c_char_p * len(args))(*args) fuse_ops = fuse_operations() for ent in fuse_operations._fields_: name, prototype = ent[:2] check_name = name if check_name in ["ftruncate", "fgetattr"]: check_name = check_name[1:] val = getattr(operations, check_name, None) if val is None: continue if hasattr(prototype, 'argtypes'): val = prototype(partial(self._wrapper, getattr(self, name))) setattr(fuse_ops, name, val) try: old_handler = signal(SIGINT, SIG_DFL) except ValueError: old_handler = SIG_DFL err = _libfuse.fuse_main_real( len(args), argv, ctypes.pointer(fuse_ops), ctypes.sizeof(fuse_ops), None) try: signal(SIGINT, old_handler) except ValueError: pass del self.operations if self.__critical_exception: raise self.__critical_exception if err: raise RuntimeError(err) @staticmethod def _normalize_fuse_options(**kargs): for key, value in kargs.items(): if isinstance(value, bool): if value is True: yield key else: yield '%s=%s' % (key, value) @staticmethod def _wrapper(func, *args, **kwargs): "a" try: if func.__name__ == "init": return func(*args, **kwargs) or 0 else: try: return func(*args, **kwargs) or 0 except OSError as e: if e.errno > 0: log.debug( "FUSE operation %s raised a %s, returning errno %s.", func.__name__, type(e), e.errno, exc_info=True) return -e.errno else: log.error( "FUSE operation %s raised an OSError with negative " "errno %s, returning errno.EINVAL.", func.__name__, e.errno, exc_info=True) return -errno.EINVAL except Exception: log.error("Uncaught exception from FUSE operation %s, " "returning errno.EINVAL.", func.__name__, exc_info=True) return -errno.EINVAL except BaseException as e: log.critical( "Uncaught critical exception from FUSE operation %s, aborting.", func.__name__, exc_info=True) fuse_exit() return -errno.EFAULT def _decode_optional_path(self, path): if path is None: return None return path.decode(self.encoding) def getattr(self, path, buf): return self.fgetattr(path, buf, None) def readlink(self, path, buf, bufsize): ret = self.operations('readlink', path.decode(self.encoding)) .encode(self.encoding) data = ctypes.create_string_buffer(ret[:bufsize - 1]) ctypes.memmove(buf, data, len(data)) return 0 def mknod(self, path, mode, dev): return self.operations('mknod', path.decode(self.encoding), mode, dev) def mkdir(self, path, mode): return self.operations('mkdir', path.decode(self.encoding), mode) def unlink(self, path): return self.operations('unlink', path.decode(self.encoding)) def rmdir(self, path): return self.operations('rmdir', path.decode(self.encoding)) def symlink(self, source, target): "a" return self.operations('symlink', target.decode(self.encoding), source.decode(self.encoding)) def rename(self, old, new): return self.operations('rename', old.decode(self.encoding), new.decode(self.encoding)) def link(self, source, target): "a" return self.operations('link', target.decode(self.encoding), source.decode(self.encoding)) def chmod(self, path, mode): return self.operations('chmod', path.decode(self.encoding), mode) def chown(self, path, uid, gid): if c_uid_t(uid + 1).value == 0: uid = -1 if c_gid_t(gid + 1).value == 0: gid = -1 return self.operations('chown', path.decode(self.encoding), uid, gid) def truncate(self, path, length): return self.operations('truncate', path.decode(self.encoding), length) def open(self, path, fip): fi = fip.contents if self.raw_fi: return self.operations('open', path.decode(self.encoding), fi) else: fi.fh = self.operations('open', path.decode(self.encoding), fi.flags) return 0 def read(self, path, buf, size, offset, fip): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh ret = self.operations('read', self._decode_optional_path(path), size, offset, fh) if not ret: return 0 retsize = len(ret) assert retsize <= size, 'actual amount read %d greater than expected %d' % (retsize, size) ctypes.memmove(buf, ret, retsize) return retsize def write(self, path, buf, size, offset, fip): data = ctypes.string_at(buf, size) if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('write', self._decode_optional_path(path), data, offset, fh) def statfs(self, path, buf): stv = buf.contents attrs = self.operations('statfs', path.decode(self.encoding)) for key, val in attrs.items(): if hasattr(stv, key): setattr(stv, key, val) return 0 def flush(self, path, fip): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('flush', self._decode_optional_path(path), fh) def release(self, path, fip): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('release', self._decode_optional_path(path), fh) def fsync(self, path, datasync, fip): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('fsync', self._decode_optional_path(path), datasync, fh) def setxattr(self, path, name, value, size, options, *args): return self.operations('setxattr', path.decode(self.encoding), name.decode(self.encoding), ctypes.string_at(value, size), options, *args) def getxattr(self, path, name, value, size, *args): ret = self.operations('getxattr', path.decode(self.encoding), name.decode(self.encoding), *args) retsize = len(ret) if not value: return retsize if retsize > size: return -errno.ERANGE buf = ctypes.create_string_buffer(ret, retsize) ctypes.memmove(value, buf, retsize) return retsize def listxattr(self, path, namebuf, size): attrs = self.operations('listxattr', path.decode(self.encoding)) or '' ret = '\x00'.join(attrs).encode(self.encoding) if len(ret) > 0: ret += '\x00'.encode(self.encoding) retsize = len(ret) if not namebuf: return retsize if retsize > size: return -errno.ERANGE buf = ctypes.create_string_buffer(ret, retsize) ctypes.memmove(namebuf, buf, retsize) return retsize def removexattr(self, path, name): return self.operations('removexattr', path.decode(self.encoding), name.decode(self.encoding)) def opendir(self, path, fip): fip.contents.fh = self.operations('opendir', path.decode(self.encoding)) return 0 def readdir(self, path, buf, filler, offset, fip): for item in self.operations('readdir', self._decode_optional_path(path), fip.contents.fh): if isinstance(item, basestring): name, st, offset = item, None, 0 else: name, attrs, offset = item if attrs: st = c_stat() set_st_attrs(st, attrs, use_ns=self.use_ns) else: st = None if filler(buf, name.encode(self.encoding), st, offset) != 0: break return 0 def releasedir(self, path, fip): return self.operations('releasedir', self._decode_optional_path(path), fip.contents.fh) def fsyncdir(self, path, datasync, fip): return self.operations('fsyncdir', self._decode_optional_path(path), datasync, fip.contents.fh) def init(self, conn): return self.operations('init', '/') def destroy(self, private_data): return self.operations('destroy', '/') def access(self, path, amode): return self.operations('access', path.decode(self.encoding), amode) def create(self, path, mode, fip): fi = fip.contents path = path.decode(self.encoding) if self.raw_fi: return self.operations('create', path, mode, fi) else: fi.fh = self.operations('create', path, mode) return 0 def ftruncate(self, path, length, fip): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('truncate', self._decode_optional_path(path), length, fh) def fgetattr(self, path, buf, fip): ctypes.memset(buf, 0, ctypes.sizeof(c_stat)) st = buf.contents if not fip: fh = fip elif self.raw_fi: fh = fip.contents else: fh = fip.contents.fh attrs = self.operations('getattr', self._decode_optional_path(path), fh) set_st_attrs(st, attrs, use_ns=self.use_ns) return 0 def lock(self, path, fip, cmd, lock): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('lock', self._decode_optional_path(path), fh, cmd, lock) def utimens(self, path, buf): if buf: atime = time_of_timespec(buf.contents.actime, use_ns=self.use_ns) mtime = time_of_timespec(buf.contents.modtime, use_ns=self.use_ns) times = (atime, mtime) else: times = None return self.operations('utimens', path.decode(self.encoding), times) def bmap(self, path, blocksize, idx): return self.operations('bmap', path.decode(self.encoding), blocksize, idx) def ioctl(self, path, cmd, arg, fip, flags, data): if self.raw_fi: fh = fip.contents else: fh = fip.contents.fh return self.operations('ioctl', path.decode(self.encoding), cmd, arg, fh, flags, data) class Operations(object): "a" def __call__(self, op, *args): if not hasattr(self, op): raise FuseOSError(errno.EFAULT) return getattr(self, op)(*args) def access(self, path, amode): return 0 bmap = None def chmod(self, path, mode): raise FuseOSError(errno.EROFS) def chown(self, path, uid, gid): raise FuseOSError(errno.EROFS) def create(self, path, mode, fi=None): "a" raise FuseOSError(errno.EROFS) def destroy(self, path): "a" pass def flush(self, path, fh): return 0 def fsync(self, path, datasync, fh): return 0 def fsyncdir(self, path, datasync, fh): return 0 def getattr(self, path, fh=None): "a" if path != '/': raise FuseOSError(errno.ENOENT) return dict(st_mode=(S_IFDIR | 0o755), st_nlink=2) def getxattr(self, path, name, position=0): raise FuseOSError(ENOTSUP) def init(self, path): "a" pass def ioctl(self, path, cmd, arg, fip, flags, data): raise FuseOSError(errno.ENOTTY) def link(self, target, source): "a" raise FuseOSError(errno.EROFS) def listxattr(self, path): return [] lock = None def mkdir(self, path, mode): raise FuseOSError(errno.EROFS) def mknod(self, path, mode, dev): raise FuseOSError(errno.EROFS) def open(self, path, flags): "a" return 0 def opendir(self, path): "a" return 0 def read(self, path, size, offset, fh): "a" raise FuseOSError(errno.EIO) def readdir(self, path, fh): "a" return ['.', '..'] def readlink(self, path): raise FuseOSError(errno.ENOENT) def release(self, path, fh): return 0 def releasedir(self, path, fh): return 0 def removexattr(self, path, name): raise FuseOSError(ENOTSUP) def rename(self, old, new): raise FuseOSError(errno.EROFS) def rmdir(self, path): raise FuseOSError(errno.EROFS) def setxattr(self, path, name, value, options, position=0): raise FuseOSError(ENOTSUP) def statfs(self, path): "a" return {} def symlink(self, target, source): "a" raise FuseOSError(errno.EROFS) def truncate(self, path, length, fh=None): raise FuseOSError(errno.EROFS) def unlink(self, path): raise FuseOSError(errno.EROFS) def utimens(self, path, times=None): "a" return 0 def write(self, path, data, offset, fh): raise FuseOSError(errno.EROFS)