Improve error handling
This commit is contained in:
Jarno Seppänen
parent
2d4a93d9fe
commit
22014090c6
73
gpgfs.py
73
gpgfs.py
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@ -1,6 +1,6 @@
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#!/usr/bin/env python
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import fuse # fusepy
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from fuse import FUSE, FuseOSError, Operations
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import gnupg # python-gnupg
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import zlib
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import errno
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@ -142,18 +142,20 @@ class LoggingMixIn:
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rtxt = rtxt[:10]
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log.debug('<- %s %s', op, rtxt)
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class GpgFs(LoggingMixIn, fuse.Operations):
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#class GpgFs(fuse.Operations):
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class GpgFs(LoggingMixIn, Operations):
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#class GpgFs(Operations):
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def __init__(self, encroot, keyid):
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'''
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:param encroot: Encrypted root directory
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'''
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self.encroot = encroot
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self.encroot = encroot.rstrip('/')
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assert os.path.exists(self.encroot)
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assert os.path.isdir(self.encroot)
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self.keyid = keyid
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#self.cache = cache
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self.gpg = gnupg.GPG()
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self.index_path = encroot + '/index'
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self.index_path = self.encroot + '/index'
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if os.path.exists(self.index_path):
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self.root = read_index(self.gpg, self.index_path)
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else:
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@ -176,9 +178,14 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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node = self.root
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path = path[1:].split('/')
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if parent:
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basename = path[-1]
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path = path[:-1]
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for name in path:
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if name not in node.children:
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raise FuseOSError(errno.ENOENT)
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node = node.children[name]
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if parent:
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return node, basename
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return node
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def _clear_write_cache(self):
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@ -199,14 +206,14 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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os.chmod(encpath, mode)
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def chown(self, path, uid, gid):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def create(self, path, mode):
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encpath = hexlify(os.urandom(20))
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encpath = encpath[:2] + '/' + encpath[2:]
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dir = self._find(path, parent=True)
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path = path.rsplit('/', 1)[-1]
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assert path not in dir.children
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dir, path = self._find(path, parent=True)
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if path in dir.children:
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raise FuseOSError(errno.EEXIST)
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dir.children[path] = Entry(type=ENT_FILE, path=encpath, st_size=0)
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log.debug('new path %s => %s', path, encpath)
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encdir = self.encroot + '/' + encpath[:2]
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@ -235,10 +242,7 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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return 0
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def getattr(self, path, fh = None):
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try:
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ent = self._find(path)
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except KeyError:
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raise fuse.FuseOSError(errno.ENOENT)
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if ent.type == ENT_DIR:
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return dict(st_mode = stat.S_IFDIR | ent.st_mode, st_size = 0,
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st_ctime = ent.st_ctime, st_mtime = ent.st_mtime,
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@ -252,15 +256,15 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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st_ctime = s.st_ctime, st_nlink = s.st_nlink)
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def getxattr(self, path, name, position = 0):
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raise fuse.FuseOSError(errno.ENODATA) # ENOATTR
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raise FuseOSError(errno.ENODATA) # ENOATTR
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def listxattr(self, path):
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return []
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def mkdir(self, path, mode):
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dir = self._find(path, parent=True)
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path = path.rsplit('/', 1)[-1]
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assert path not in dir.children
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dir, path = self._find(path, parent=True)
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if path in dir.children:
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raise FuseOSError(errno.EEXIST)
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dir.children[path] = Entry(type=ENT_DIR, children={},
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st_mode=(mode & 0777),
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st_mtime=int(time.time()),
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@ -283,45 +287,47 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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return ['.', '..'] + list(dir.children)
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def readlink(self, path):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def removexattr(self, path, name):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def rename(self, old, new):
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self.flush(old, 0)
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self._clear_write_cache()
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old_dir = self._find(old, parent=True)
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old_name = old.rsplit('/', 1)[-1]
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new_dir = self._find(new, parent=True)
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new_name = new.rsplit('/', 1)[-1]
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old_dir, old_name = self._find(old, parent=True)
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if old_name not in old_dir.children:
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raise FuseOSError(errno.ENOENT)
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new_dir, new_name = self._find(new, parent=True)
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if new_name in new_dir.children:
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ent = new_dir.children[new_name]
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if ent.type == ENT_FILE:
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os.remove(self.encroot + '/' + ent.path)
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elif ent.children:
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raise FuseOSError(errno.ENOTEMPTY)
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new_dir.children[new_name] = old_dir.children.pop(old_name)
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self._write_index()
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def rmdir(self, path):
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parent = self._find(path, parent=True)
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path = path.rsplit('/', 1)[-1]
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assert path in parent.children
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parent, path = self._find(path, parent=True)
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if path not in parent.children:
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raise FuseOSError(errno.ENOENT)
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ent = parent.children[path]
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if ent.type != ENT_DIR:
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raise fuse.FuseOSError(errno.ENOTDIR)
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raise FuseOSError(errno.ENOTDIR)
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if ent.children:
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raise fuse.FuseOSError(errno.ENOTEMPTY)
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raise FuseOSError(errno.ENOTEMPTY)
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del parent.children[path]
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self._write_index()
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def setxattr(self, path, name, value, options, position = 0):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def statfs(self, path):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def symlink(self, target, source):
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raise fuse.FuseOSError(errno.ENOSYS)
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raise FuseOSError(errno.ENOSYS)
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def truncate(self, path, length, fh = None):
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self.flush(path, 0)
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@ -342,8 +348,9 @@ class GpgFs(LoggingMixIn, fuse.Operations):
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if self.write_path == path:
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# no need to flush afterwards
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self._clear_write_cache()
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dir = self._find(path, parent=True)
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name = path.rsplit('/', 1)[-1]
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dir, name = self._find(path, parent=True)
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if name not in dir.children:
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raise FuseOSError(errno.ENOENT)
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encpath = self.encroot + '/' + dir.children[name].path
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os.remove(encpath)
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del dir.children[name]
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@ -391,4 +398,4 @@ if __name__ == '__main__':
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log.addHandler(logging.FileHandler(logpath, 'w'))
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log.setLevel(logging.DEBUG)
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fs = GpgFs(sys.argv[2], sys.argv[1])
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fuse.FUSE(fs, sys.argv[3], foreground=True)
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FUSE(fs, sys.argv[3], foreground=True)
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