return NoEntry()
controller = match.pop('controller')
result = getattr(self, controller)(**match)
+ if result is None:
+ return NoEntry()
if type(result) is str:
result = File(result)
if type(result) is list:
If the path specified is a file, return the requested portion
of the file
"""
- obj = self._get_file(path)
- if type(obj) is NoEntry:
- return -errno.ENOENT
- elif type(obj) in (Directory, Symlink):
- return -errno.EINVAL
- else:
- return obj[offset:offset + length]
+ return self._get_file(path).read(length, offset)
def readlink(self, path):
"""
If the path specified is a symlink, return the target
"""
- obj = self._get_file(path)
- if obj is None:
- return -errno.ENOENT
- elif type(obj) is not Symlink:
- return -errno.EINVAL
- else:
- return obj
+ return self._get_file(path).readlink()
class TreeKey(object):
def getattr(self):
return -errno.EINVAL
def readdir(self, offset):
return -errno.EINVAL
+ def read(self, length, offset):
+ return -errno.EINVAL
+ def readlink(self):
+ return -errno.EINVAL
class NoEntry(TreeKey):
def getattr(self):
return -errno.ENOENT
def readdir(self, offset):
return -errno.ENOENT
+ def read(self, length, offset):
+ return -errno.ENOENT
+ def readlink(self):
+ return -errno.ENOENT
class TreeEntry(TreeKey):
default_mode = 0444
st.st_size = len(self)
return st
+ def readlink(self):
+ return self
+
class File(TreeEntry, str):
"""
A dummy class representing something that should be a file
st.st_size = len(self)
return st
+ def read(self, length, offset):
+ return self[offset:offset + length]
+
def main(cls):
"""
A convenience function for initializing a RouteFS filesystem