def _open_file(fs, path, mode):
try:
return open(str(path), mode)
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path)
raise
def _list_directory(fs, path):
try:
return os.listdir(str(path))
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path)
raise
def realpath(self, path):
real = Path.root()
for segment in path.segments:
seen = current, = {real.descendant(segment)}
while self.is_link(path=current):
current = self._links[current].relative_to(current.parent())
if current in seen:
raise exceptions.SymbolicLoop(current)
seen.add(current)
real = current
return real
def _remove_empty_directory(fs, path):
try:
os.rmdir(str(path))
except (IOError, OSError) as error:
if error.errno == exceptions.DirectoryNotEmpty.errno:
raise exceptions.DirectoryNotEmpty(path)
elif error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path.parent())
raise
def _link(fs, source, to):
try:
os.symlink(str(source), str(to))
except (IOError, OSError) as error:
if error.errno == exceptions.FileExists.errno:
raise exceptions.FileExists(to)
elif error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(to.parent())
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(to.parent())
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(to.parent())
raise
def _create_file(fs, path):
try:
fd = os.open(str(path), _CREATE_FLAGS)
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.FileExists.errno:
raise exceptions.FileExists(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path.parent())
raise
return os.fdopen(fd, "w+b")
def _remove_file(fs, path):
try:
os.remove(str(path))
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.IsADirectory.errno:
raise exceptions.IsADirectory(path)
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path)
elif error.errno == exceptions.PermissionError.errno:
raise exceptions.PermissionError(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path.parent())
raise
def _open_file(fs, path, mode):
mode = common._parse_mode(mode)
try:
return io.open(str(path), mode.io_open_string())
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.IsADirectory.errno:
raise exceptions.IsADirectory(path)
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path)
raise
def _readlink(fs, path):
try:
value = os.readlink(str(path))
except (IOError, OSError) as error:
if error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path)
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path)
elif error.errno == exceptions.NotASymlink.errno:
raise exceptions.NotASymlink(path)
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path)
raise
else:
return Path.from_string(value)
def _create_directory(fs, path, with_parents):
try:
if with_parents:
os.makedirs(str(path))
else:
os.mkdir(str(path))
except (IOError, OSError) as error:
if error.errno == exceptions.FileExists.errno:
raise exceptions.FileExists(path)
elif error.errno == exceptions.FileNotFound.errno:
raise exceptions.FileNotFound(path.parent())
elif error.errno == exceptions.NotADirectory.errno:
raise exceptions.NotADirectory(path.parent())
elif error.errno == exceptions.SymbolicLoop.errno:
raise exceptions.SymbolicLoop(path.parent())
raise
def _realpath(fs, path):
"""
.. warning::
The ``os.path`` module's realpath does not error or warn about
loops, but we do, following the behavior of GNU ``realpath(1)``!
"""
real = Path.root()
for segment in path.segments:
seen = current, = {str(real.descendant(segment))}
while os.path.islink(current):
current = os.path.join(
os.path.dirname(current), os.readlink(current),
)
if current in seen:
raise exceptions.SymbolicLoop(current)
seen.add(current)
real = Path.from_string(current)
return real
def _realpath(fs, path, seen=pset()):
"""
.. warning::
The ``os.path`` module's realpath does not error or warn about
loops, but we do, following the behavior of GNU ``realpath(1)``!
"""
real = Path.root()
for segment in path.segments:
current = real / segment
seen = seen.add(current)
while True:
try:
current = fs.readlink(current)
except (exceptions.FileNotFound, exceptions.NotASymlink):
break
else:
current = current.relative_to(real)
if current in seen:
raise exceptions.SymbolicLoop(path)
current = fs.realpath(current, seen=seen)
real = current
return real
