From: david-sarah Date: Tue, 18 May 2010 05:45:21 +0000 (-0700) Subject: SFTP: fixes related to reporting of permissions (needed for sshfs). X-Git-Tag: trac-4400~22 X-Git-Url: https://git.rkrishnan.org/%5B/rgr-080307.php?a=commitdiff_plain;h=819eaa74c1085d06565e334e89ca0032b73882aa;p=tahoe-lafs%2Ftahoe-lafs.git SFTP: fixes related to reporting of permissions (needed for sshfs). --- diff --git a/src/allmydata/frontends/sftpd.py b/src/allmydata/frontends/sftpd.py index eb172c95..46211f8d 100644 --- a/src/allmydata/frontends/sftpd.py +++ b/src/allmydata/frontends/sftpd.py @@ -17,6 +17,7 @@ from twisted.conch.avatar import ConchUser from twisted.conch.openssh_compat import primes from twisted.cred import portal from twisted.internet.error import ProcessDone, ProcessTerminated +from twisted.internet.interfaces import ITransport from twisted.internet import defer from twisted.internet.interfaces import IFinishableConsumer @@ -96,7 +97,7 @@ def _raise_error(err): if err is None: return None if noisy: logmsg("RAISE %r" % (err,), level=NOISY) - #traceback.print_exc(err) + if noisy and not use_foolscap_logging: traceback.print_exc(err) # The message argument to SFTPError must not reveal information that # might compromise anonymity. @@ -129,6 +130,7 @@ def _raise_error(err): # We assume that the error message is not anonymity-sensitive. raise SFTPError(FX_FAILURE, str(err.value)) + def _repr_flags(flags): return "|".join([f for f in [(flags & FXF_READ) and "FXF_READ" or None, @@ -140,6 +142,7 @@ def _repr_flags(flags): ] if f]) + def _lsLine(name, attrs): st_uid = "tahoe" st_gid = "tahoe" @@ -159,26 +162,26 @@ def _lsLine(name, attrs): mode = st_mode perms = array.array('c', '-'*10) ft = stat.S_IFMT(mode) - if stat.S_ISDIR(ft): perms[0] = 'd' - elif stat.S_ISCHR(ft): perms[0] = 'c' - elif stat.S_ISBLK(ft): perms[0] = 'b' - elif stat.S_ISREG(ft): perms[0] = '-' + if stat.S_ISDIR(ft): perms[0] = 'd' + elif stat.S_ISCHR(ft): perms[0] = 'c' + elif stat.S_ISBLK(ft): perms[0] = 'b' + elif stat.S_ISREG(ft): perms[0] = '-' elif stat.S_ISFIFO(ft): perms[0] = 'f' - elif stat.S_ISLNK(ft): perms[0] = 'l' + elif stat.S_ISLNK(ft): perms[0] = 'l' elif stat.S_ISSOCK(ft): perms[0] = 's' else: perms[0] = '?' # user - if mode&stat.S_IRUSR:perms[1] = 'r' - if mode&stat.S_IWUSR:perms[2] = 'w' - if mode&stat.S_IXUSR:perms[3] = 'x' + if mode&stat.S_IRUSR: perms[1] = 'r' + if mode&stat.S_IWUSR: perms[2] = 'w' + if mode&stat.S_IXUSR: perms[3] = 'x' # group - if mode&stat.S_IRGRP:perms[4] = 'r' - if mode&stat.S_IWGRP:perms[5] = 'w' - if mode&stat.S_IXGRP:perms[6] = 'x' + if mode&stat.S_IRGRP: perms[4] = 'r' + if mode&stat.S_IWGRP: perms[5] = 'w' + if mode&stat.S_IXGRP: perms[6] = 'x' # other - if mode&stat.S_IROTH:perms[7] = 'r' - if mode&stat.S_IWOTH:perms[8] = 'w' - if mode&stat.S_IXOTH:perms[9] = 'x' + if mode&stat.S_IROTH: perms[7] = 'r' + if mode&stat.S_IWOTH: perms[8] = 'w' + if mode&stat.S_IXOTH: perms[9] = 'x' # suid/sgid never set l = perms.tostring() @@ -198,64 +201,74 @@ def _lsLine(name, attrs): l += name return l -def _populate_attrs(childnode, metadata, writeable, size=None): - attrs = {} - # see webapi.txt for what these times mean - if metadata: - if "linkmotime" in metadata.get("tahoe", {}): - attrs["mtime"] = int(metadata["tahoe"]["linkmotime"]) - elif "mtime" in metadata: - attrs["mtime"] = int(metadata["mtime"]) +def _is_readonly(parent_readonly, child): + """Whether child should be treated as having read-only permissions when listed + in parent.""" - if "linkcrtime" in metadata.get("tahoe", {}): - attrs["createtime"] = int(metadata["tahoe"]["linkcrtime"]) - - if "ctime" in metadata: - attrs["ctime"] = int(metadata["ctime"]) + if child.is_unknown(): + return True + elif child.is_mutable(): + return child.is_readonly() + else: + return parent_readonly - # We would prefer to omit atime, but SFTP version 3 can only - # accept mtime if atime is also set. - attrs["atime"] = attrs["mtime"] - # The permissions must have the extra bits (040000 or 0100000), - # otherwise the client will not call openDirectory. +def _populate_attrs(childnode, metadata, size=None): + attrs = {} + # The permissions must have the S_IFDIR (040000) or S_IFREG (0100000) + # bits, otherwise the client may refuse to open a directory. + # Also, sshfs run as a non-root user requires files and directories + # to be world-readable/writeable. + # # Directories and unknown nodes have no size, and SFTP doesn't # require us to make one up. + # # childnode might be None, meaning that the file doesn't exist yet, # but we're going to write it later. if childnode and childnode.is_unknown(): perms = 0 elif childnode and IDirectoryNode.providedBy(childnode): - perms = S_IFDIR | 0770 + perms = S_IFDIR | 0777 else: # For files, omit the size if we don't immediately know it. if childnode and size is None: size = childnode.get_size() if size is not None: - assert isinstance(size, (int, long)), repr(size) - attrs["size"] = size - perms = S_IFREG | 0660 + assert isinstance(size, (int, long)) and not isinstance(size, bool), repr(size) + attrs['size'] = size + perms = S_IFREG | 0666 - if not writeable: - perms &= S_IFDIR | S_IFREG | 0555 # clear 'w' bits + if metadata: + assert 'readonly' in metadata, metadata + if metadata['readonly']: + perms &= S_IFDIR | S_IFREG | 0555 # clear 'w' bits + + # see webapi.txt for what these times mean + if 'linkmotime' in metadata.get('tahoe', {}): + attrs['mtime'] = int(metadata['tahoe']['linkmotime']) + elif 'mtime' in metadata: + # We would prefer to omit atime, but SFTP version 3 can only + # accept mtime if atime is also set. + attrs['mtime'] = int(metadata['mtime']) + attrs['atime'] = attrs['mtime'] + + if 'linkcrtime' in metadata.get('tahoe', {}): + attrs['createtime'] = int(metadata['tahoe']['linkcrtime']) - attrs["permissions"] = perms + if 'ctime' in metadata: + attrs['ctime'] = int(metadata['ctime']) - # We could set the SSH_FILEXFER_ATTR_FLAGS here: - # ENCRYPTED would always be true ("The file is stored on disk - # using file-system level transparent encryption.") - # SYSTEM, HIDDEN, ARCHIVE and SYNC would always be false. - # READONLY and IMMUTABLE would be set according to - # childnode.is_readonly() and childnode.is_immutable() - # for known nodes. - # However, twisted.conch.ssh.filetransfer only implements - # SFTP version 3, which doesn't include these flags. + attrs['permissions'] = perms + + # twisted.conch.ssh.filetransfer only implements SFTP version 3, + # which doesn't include SSH_FILEXFER_ATTR_FLAGS. return attrs + class EncryptedTemporaryFile(PrefixingLogMixin): # not implemented: next, readline, readlines, xreadlines, writelines @@ -533,6 +546,7 @@ def _make_sftp_file(check_abort, flags, convergence, parent=None, childname=None if noisy: logmsg("_make_sftp_file(%r, %r, , parent=%r, childname=%r, filenode=%r, metadata=%r" % (check_abort, flags, parent, childname, filenode, metadata), level=NOISY) + assert metadata is None or 'readonly' in metadata, metadata if not (flags & (FXF_WRITE | FXF_CREAT)) and (flags & FXF_READ) and filenode and \ not filenode.is_mutable() and filenode.get_size() <= SIZE_THRESHOLD: return ShortReadOnlySFTPFile(filenode, metadata) @@ -604,7 +618,7 @@ class ShortReadOnlySFTPFile(PrefixingLogMixin): def _closed(): raise SFTPError(FX_BAD_MESSAGE, "cannot get attributes for a closed file handle") return defer.execute(_closed) - return defer.succeed(_populate_attrs(self.filenode, self.metadata, False)) + return defer.succeed(_populate_attrs(self.filenode, self.metadata)) def setAttrs(self, attrs): self.log(".setAttrs(%r)" % (attrs,), level=OPERATIONAL) @@ -660,7 +674,7 @@ class GeneralSFTPFile(PrefixingLogMixin): self.async.addCallback(_downloaded) else: download_size = filenode.get_size() - assert download_size is not None + assert download_size is not None, "download_size is None" self.consumer = OverwriteableFileConsumer(self.check_abort, download_size, tempfile_maker) def _read(ign): if noisy: self.log("_read immutable", level=NOISY) @@ -741,10 +755,10 @@ class GeneralSFTPFile(PrefixingLogMixin): d2.addCallback(lambda ign: self.consumer.get_current_size()) d2.addCallback(lambda size: self.consumer.read(0, size)) d2.addCallback(lambda new_contents: self.filenode.overwrite(new_contents)) - #elif (self.flags & FXF_EXCL) and self.consumer.get_current_size() == 0: - # # The file will already have been written by the open call, so we can - # # optimize out the extra directory write (useful for zero-length lockfiles). - # pass + elif (self.flags & FXF_EXCL) and self.consumer.get_current_size() == 0: + # The file will already have been written by the open call, so we can + # optimize out the extra directory write (useful for zero-length lockfiles). + pass else: def _add_file(ign): self.log("_add_file childname=%r" % (self.childname,), level=OPERATIONAL) @@ -769,14 +783,12 @@ class GeneralSFTPFile(PrefixingLogMixin): # Optimization for read-only handles, when we already know the metadata. if not(self.flags & (FXF_WRITE | FXF_CREAT)) and self.metadata and self.filenode and not self.filenode.is_mutable(): - return defer.succeed(_populate_attrs(self.filenode, self.metadata, False)) + return defer.succeed(_populate_attrs(self.filenode, self.metadata)) d = defer.Deferred() def _get(ign): - # FIXME: pass correct value for writeable # self.filenode might be None, but that's ok. - attrs = _populate_attrs(self.filenode, self.metadata, False, - size=self.consumer.get_current_size()) + attrs = _populate_attrs(self.filenode, self.metadata, size=self.consumer.get_current_size()) eventually_callback(d)(attrs) return None self.async.addCallbacks(_get, eventually_errback(d)) @@ -902,7 +914,6 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): # Note that the permission checks below are for more precise error reporting on # the open call; later operations would fail even if we did not make these checks. - stash = {'parent': None} d = self._get_root(path) def _got_root((root, path)): if root.is_unknown(): @@ -919,7 +930,7 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): raise SFTPError(FX_PERMISSION_DENIED, "cannot write to a non-writeable filecap without a parent directory") if flags & FXF_EXCL: - raise SFTPError(FX_PERMISSION_DENIED, + raise SFTPError(FX_FAILURE, "cannot create a file exclusively when it already exists") return _make_sftp_file(self.check_abort, flags, self._convergence, filenode=root) @@ -931,8 +942,13 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): d2 = root.get_child_at_path(path[:-1]) def _got_parent(parent): if noisy: self.log("_got_parent(%r)" % (parent,), level=NOISY) - stash['parent'] = parent + if parent.is_unknown(): + raise SFTPError(FX_PERMISSION_DENIED, + "cannot open an unknown cap (or child of an unknown directory). " + "Upgrading the gateway to a later Tahoe-LAFS version may help") + parent_readonly = parent.is_readonly() + d3 = defer.succeed(None) if flags & FXF_EXCL: # FXF_EXCL means that the link to the file (not the file itself) must # be created atomically wrt updates by this storage client. @@ -941,60 +957,64 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): # case). We make the link initially point to a zero-length LIT file, # which is consistent with what might happen on a POSIX filesystem. - if parent.is_readonly(): - raise SFTPError(FX_PERMISSION_DENIED, + if parent_readonly: + raise SFTPError(FX_FAILURE, "cannot create a file exclusively when the parent directory is read-only") # 'overwrite=False' ensures failure if the link already exists. # FIXME: should use a single call to set_uri and return (child, metadata) (#1035) + zero_length_lit = "URI:LIT:" - d3 = parent.set_uri(childname, None, zero_length_lit, overwrite=False) + if noisy: self.log("%r.set_uri(%r, None, readcap=%r, overwrite=False)" % + (parent, zero_length_lit, childname), level=NOISY) + d3.addCallback(lambda ign: parent.set_uri(childname, None, readcap=zero_length_lit, overwrite=False)) def _seturi_done(child): - stash['child'] = child - return parent.get_metadata_for(childname) + if noisy: self.log("%r.get_metadata_for(%r)" % (parent, childname), level=NOISY) + d4 = parent.get_metadata_for(childname) + d4.addCallback(lambda metadata: (child, metadata)) + return d4 d3.addCallback(_seturi_done) - d3.addCallback(lambda metadata: (stash['child'], metadata)) - return d3 else: - if noisy: self.log("get_child_and_metadata(%r)" % (childname,), level=NOISY) - return parent.get_child_and_metadata(childname) - d2.addCallback(_got_parent) + if noisy: self.log("%r.get_child_and_metadata(%r)" % (parent, childname), level=NOISY) + d3.addCallback(lambda ign: parent.get_child_and_metadata(childname)) - def _got_child( (filenode, metadata) ): - if noisy: self.log("_got_child( (%r, %r) )" % (filenode, metadata), level=NOISY) - parent = stash['parent'] - if filenode.is_unknown(): - raise SFTPError(FX_PERMISSION_DENIED, - "cannot open an unknown cap. Upgrading the gateway " - "to a later Tahoe-LAFS version may help") - if not IFileNode.providedBy(filenode): - raise SFTPError(FX_PERMISSION_DENIED, - "cannot open a directory as if it were a file") - if (flags & FXF_WRITE) and filenode.is_mutable() and filenode.is_readonly(): - raise SFTPError(FX_PERMISSION_DENIED, - "cannot open a read-only mutable file for writing") - if (flags & FXF_WRITE) and parent.is_readonly(): - raise SFTPError(FX_PERMISSION_DENIED, - "cannot open a file for writing when the parent directory is read-only") - - return _make_sftp_file(self.check_abort, flags, self._convergence, parent=parent, - childname=childname, filenode=filenode, metadata=metadata) - def _no_child(f): - if noisy: self.log("_no_child(%r)" % (f,), level=NOISY) - f.trap(NoSuchChildError) - parent = stash['parent'] - if parent is None: - return f - if not (flags & FXF_CREAT): - raise SFTPError(FX_NO_SUCH_FILE, - "the file does not exist, and was not opened with the creation (CREAT) flag") - if parent.is_readonly(): - raise SFTPError(FX_PERMISSION_DENIED, - "cannot create a file when the parent directory is read-only") + def _got_child( (filenode, metadata) ): + if noisy: self.log("_got_child( (%r, %r) )" % (filenode, metadata), level=NOISY) - return _make_sftp_file(self.check_abort, flags, self._convergence, parent=parent, - childname=childname) - d2.addCallbacks(_got_child, _no_child) + if filenode.is_unknown(): + raise SFTPError(FX_PERMISSION_DENIED, + "cannot open an unknown cap. Upgrading the gateway " + "to a later Tahoe-LAFS version may help") + if not IFileNode.providedBy(filenode): + raise SFTPError(FX_PERMISSION_DENIED, + "cannot open a directory as if it were a file") + if (flags & FXF_WRITE) and filenode.is_mutable() and filenode.is_readonly(): + raise SFTPError(FX_PERMISSION_DENIED, + "cannot open a read-only mutable file for writing") + if (flags & FXF_WRITE) and parent_readonly: + raise SFTPError(FX_PERMISSION_DENIED, + "cannot open a file for writing when the parent directory is read-only") + + metadata['readonly'] = _is_readonly(parent_readonly, filenode) + return _make_sftp_file(self.check_abort, flags, self._convergence, parent=parent, + childname=childname, filenode=filenode, metadata=metadata) + def _no_child(f): + if noisy: self.log("_no_child(%r)" % (f,), level=NOISY) + f.trap(NoSuchChildError) + + if not (flags & FXF_CREAT): + raise SFTPError(FX_NO_SUCH_FILE, + "the file does not exist, and was not opened with the creation (CREAT) flag") + if parent_readonly: + raise SFTPError(FX_PERMISSION_DENIED, + "cannot create a file when the parent directory is read-only") + + return _make_sftp_file(self.check_abort, flags, self._convergence, parent=parent, + childname=childname) + d3.addCallbacks(_got_child, _no_child) + return d3 + + d2.addCallback(_got_parent) return d2 d.addCallback(_got_root) d.addErrback(_raise_error) @@ -1013,13 +1033,18 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): toPath = self._path_from_string(newpathstring) # the target directory must already exist - d = deferredutil.gatherResults([self._get_parent(fromPath), - self._get_parent(toPath)]) + d = deferredutil.gatherResults([self._get_parent_or_node(fromPath), + self._get_parent_or_node(toPath)]) def _got( (fromPair, toPair) ): if noisy: self.log("_got( (%r, %r) ) in .renameFile(%r, %r)" % (fromPair, toPair, oldpathstring, newpathstring), level=NOISY) (fromParent, fromChildname) = fromPair (toParent, toChildname) = toPair + + if fromChildname is None: + raise SFTPError(FX_NO_SUCH_FILE, "cannot rename a source object specified by URI") + if toChildname is None: + raise SFTPError(FX_NO_SUCH_FILE, "cannot rename to a destination specified by URI") # # "It is an error if there already exists a file with the name specified @@ -1046,9 +1071,8 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): def _get_or_create_directories(self, node, path, metadata): if not IDirectoryNode.providedBy(node): - # unfortunately it is too late to provide the name of the - # blocking file in the error message. - raise SFTPError(FX_PERMISSION_DENIED, + # TODO: provide the name of the blocking file in the error message. + raise SFTPError(FX_FAILURE, "cannot create directory because there " "is a file in the way") # close enough if not path: @@ -1069,8 +1093,15 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): return self._remove_object(path, must_be_directory=True) def _remove_object(self, path, must_be_directory=False, must_be_file=False): - d = defer.maybeDeferred(self._get_parent, path) + d = defer.maybeDeferred(self._get_parent_or_node, path) def _got_parent( (parent, childname) ): + # FIXME (minor): there is a race condition between the 'get' and 'delete', + # so it is possible that the must_be_directory or must_be_file restrictions + # might not be enforced correctly if the type has just changed. + + if childname is None: + raise SFTPError(FX_NO_SUCH_FILE, "cannot delete an object specified by URI") + d2 = parent.get(childname) def _got_child(child): # Unknown children can be removed by either removeFile or removeDirectory. @@ -1098,15 +1129,15 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): if not IDirectoryNode.providedBy(dirnode): raise SFTPError(FX_PERMISSION_DENIED, "cannot list a file as if it were a directory") + d2 = dirnode.list() def _render(children): - parent_writeable = not dirnode.is_readonly() + parent_readonly = dirnode.is_readonly() results = [] - for filename, (node, metadata) in children.iteritems(): + for filename, (child, metadata) in children.iteritems(): # The file size may be cached or absent. - writeable = parent_writeable and (node.is_unknown() or - not (node.is_mutable() and node.is_readonly())) - attrs = _populate_attrs(node, metadata, writeable) + metadata['readonly'] = _is_readonly(parent_readonly, child) + attrs = _populate_attrs(child, metadata) filename_utf8 = filename.encode('utf-8') longname = _lsLine(filename_utf8, attrs) results.append( (filename_utf8, longname, attrs) ) @@ -1126,12 +1157,9 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): # TODO: the modification time for a mutable file should be # reported as the update time of the best version. But that # information isn't currently stored in mutable shares, I think. + d2 = node.get_current_size() - def _got_size(size): - # FIXME: pass correct value for writeable - attrs = _populate_attrs(node, metadata, False, size=size) - return attrs - d2.addCallback(_got_size) + d2.addCallback(lambda size: _populate_attrs(node, metadata, size=size)) return d2 d.addCallback(_render) d.addErrback(_raise_error) @@ -1212,19 +1240,8 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): if noisy: self.log(" PATH %r" % (path,), level=NOISY) return path - def _get_node_and_metadata_for_path(self, path): - d = self._get_root(path) - def _got_root( (root, path) ): - if noisy: self.log("_got_root( (%r, %r) )" % (root, path), level=NOISY) - if path: - return root.get_child_and_metadata_at_path(path) - else: - return (root, {}) - d.addCallback(_got_root) - return d - def _get_root(self, path): - # return (root, remaining_path) + # return Deferred (root, remaining_path) if path and path[0] == u"uri": d = defer.maybeDeferred(self._client.create_node_from_uri, path[1].encode('utf-8')) d.addCallback(lambda root: (root, path[2:])) @@ -1232,23 +1249,38 @@ class SFTPUserHandler(ConchUser, PrefixingLogMixin): d = defer.succeed((self._root, path)) return d - def _get_parent(self, path): - # fire with (parentnode, childname) - if not path: - def _nosuch(): raise SFTPError(FX_NO_SUCH_FILE, "path does not exist") - return defer.execute(_nosuch) - - childname = path[-1] - assert isinstance(childname, unicode), repr(childname) + def _get_parent_or_node(self, path): + # return Deferred (parent, childname) or (node, None) d = self._get_root(path) - def _got_root( (root, path) ): - if not path: - raise SFTPError(FX_NO_SUCH_FILE, "path does not exist") - return root.get_child_at_path(path[:-1]) + def _got_root( (root, remaining_path) ): + if not remaining_path: + return (root, None) + else: + d2 = root.get_child_at_path(remaining_path[:-1]) + d2.addCallback(lambda parent: (parent, remaining_path[-1])) + return d2 d.addCallback(_got_root) - def _got_parent(parent): - return (parent, childname) - d.addCallback(_got_parent) + return d + + def _get_node_and_metadata_for_path(self, path): + # return Deferred (node, metadata) + # where metadata always has a 'readonly' key + d = self._get_parent_or_node(path) + def _got_parent_or_node( (parent_or_node, childname) ): + if noisy: self.log("_got_parent_or_node( (%r, %r) )" % (parent_or_node, childname), level=NOISY) + if childname is None: + node = parent_or_node + return (node, {'readonly': node.is_unknown() or node.is_readonly()}) + else: + parent = parent_or_node + d2 = parent.get_child_and_metadata_at_path([childname]) + def _got( (child, metadata) ): + assert IDirectoryNode.providedBy(parent), parent + metadata['readonly'] = _is_readonly(parent.is_readonly(), child) + return (child, metadata) + d2.addCallback(_got) + return d2 + d.addCallback(_got_parent_or_node) return d def _attrs_to_metadata(self, attrs): @@ -1312,7 +1344,7 @@ class Dispatcher: self._client = client def requestAvatar(self, avatarID, mind, interface): - assert interface == IConchUser + assert interface == IConchUser, interface rootnode = self._client.create_node_from_uri(avatarID.rootcap) handler = SFTPUserHandler(self._client, rootnode, avatarID.username) return (interface, handler, handler.logout) diff --git a/src/allmydata/test/test_sftp.py b/src/allmydata/test/test_sftp.py index c6b1fa06..04c67ef7 100644 --- a/src/allmydata/test/test_sftp.py +++ b/src/allmydata/test/test_sftp.py @@ -46,7 +46,7 @@ def trace_calls(frame, event, arg): sys.settrace(trace_calls) """ -timeout = 30 +timeout = 60 from allmydata.interfaces import IDirectoryNode, ExistingChildError, NoSuchChildError from allmydata.mutable.common import NotWriteableError @@ -71,8 +71,8 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): if isinstance(res, Failure): res.trap(sftp.SFTPError) self.failUnlessReallyEqual(res.value.code, expected_code, - "%s was supposed to raise SFTPError(%d), not SFTPError(%d): %s" % - (which, expected_code, res.value.code, res)) + "%s was supposed to raise SFTPError(%d), not SFTPError(%d): %s" % + (which, expected_code, res.value.code, res)) else: print '@' + '@'.join(s) self.fail("%s was supposed to raise SFTPError(%d), not get '%s'" % @@ -276,11 +276,13 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): (name, text, attrs) = a (expected_name, expected_text_re, expected_attrs) = b self.failUnlessReallyEqual(name, expected_name) - self.failUnless(re.match(expected_text_re, text), "%r does not match %r" % (text, expected_text_re)) + self.failUnless(re.match(expected_text_re, text), + "%r does not match %r in\n%r" % (text, expected_text_re, actual_list)) # it is ok for there to be extra actual attributes # TODO: check times for e in expected_attrs: - self.failUnlessReallyEqual(attrs[e], expected_attrs[e]) + self.failUnlessReallyEqual(attrs[e], expected_attrs[e], + "%r:%r is not %r in\n%r" % (e, attrs[e], expected_attrs[e], attrs)) def test_openDirectory_and_attrs(self): d = self._set_up("openDirectory_and_attrs") @@ -301,14 +303,14 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): gross = u"gro\u00DF".encode("utf-8") expected_root = [ - ('empty_lit_dir', r'drwxrwx--- .* \? .* empty_lit_dir$', {'permissions': S_IFDIR | 0770}), - (gross, r'-rw-rw---- .* 1010 .* '+gross+'$', {'permissions': S_IFREG | 0660, 'size': 1010}), - ('loop', r'drwxrwx--- .* \? .* loop$', {'permissions': S_IFDIR | 0770}), - ('mutable', r'-rw-rw---- .* \? .* mutable$', {'permissions': S_IFREG | 0660}), - ('readonly', r'-r--r----- .* \? .* readonly$', {'permissions': S_IFREG | 0440}), - ('small', r'-rw-rw---- .* 10 .* small$', {'permissions': S_IFREG | 0660, 'size': 10}), - ('small2', r'-rw-rw---- .* 26 .* small2$', {'permissions': S_IFREG | 0660, 'size': 26}), - ('tiny_lit_dir', r'drwxrwx--- .* \? .* tiny_lit_dir$', {'permissions': S_IFDIR | 0770}), + ('empty_lit_dir', r'drwxrwxrwx .* \? .* empty_lit_dir$', {'permissions': S_IFDIR | 0777}), + (gross, r'-rw-rw-rw- .* 1010 .* '+gross+'$', {'permissions': S_IFREG | 0666, 'size': 1010}), + ('loop', r'drwxrwxrwx .* \? .* loop$', {'permissions': S_IFDIR | 0777}), + ('mutable', r'-rw-rw-rw- .* \? .* mutable$', {'permissions': S_IFREG | 0666}), + ('readonly', r'-r--r--r-- .* \? .* readonly$', {'permissions': S_IFREG | 0444}), + ('small', r'-rw-rw-rw- .* 10 .* small$', {'permissions': S_IFREG | 0666, 'size': 10}), + ('small2', r'-rw-rw-rw- .* 26 .* small2$', {'permissions': S_IFREG | 0666, 'size': 26}), + ('tiny_lit_dir', r'drwxrwxrwx .* \? .* tiny_lit_dir$', {'permissions': S_IFDIR | 0777}), ('unknown', r'\?--------- .* \? .* unknown$', {'permissions': 0}), ] @@ -323,9 +325,9 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d.addCallback(lambda ign: self.handler.openDirectory("empty_lit_dir")) d.addCallback(lambda res: self._compareDirLists(res, [])) - + expected_tiny_lit = [ - ('short', r'-r--r----- .* 8 Jan 01 1970 short$', {'permissions': S_IFREG | 0440, 'size': 8}), + ('short', r'-r--r--r-- .* 8 Jan 01 1970 short$', {'permissions': S_IFREG | 0444, 'size': 8}), ] d.addCallback(lambda ign: self.handler.openDirectory("tiny_lit_dir")) @@ -333,8 +335,8 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d.addCallback(lambda ign: self.handler.getAttrs("small", True)) def _check_attrs(attrs): - self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0440) #FIXME - self.failUnlessReallyEqual(attrs['size'], 10) + self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0666) + self.failUnlessReallyEqual(attrs['size'], 10, repr(attrs)) d.addCallback(_check_attrs) d.addCallback(lambda ign: @@ -391,6 +393,9 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda ign: rf.readChunk(2, 6)) d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "234567")) + d2.addCallback(lambda ign: rf.readChunk(1, 0)) + d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "")) + d2.addCallback(lambda ign: rf.readChunk(8, 4)) # read that starts before EOF is OK d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "89")) @@ -406,8 +411,8 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda ign: rf.getAttrs()) def _check_attrs(attrs): - self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0440) #FIXME - self.failUnlessReallyEqual(attrs['size'], 10) + self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0666) + self.failUnlessReallyEqual(attrs['size'], 10, repr(attrs)) d2.addCallback(_check_attrs) d2.addCallback(lambda ign: @@ -440,6 +445,9 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda ign: rf.readChunk(2, 6)) d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "234567")) + d2.addCallback(lambda ign: rf.readChunk(1, 0)) + d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "")) + d2.addCallback(lambda ign: rf.readChunk(1008, 4)) # read that starts before EOF is OK d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "89")) @@ -455,7 +463,7 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda ign: rf.getAttrs()) def _check_attrs(attrs): - self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0440) #FIXME + self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0666) self.failUnlessReallyEqual(attrs['size'], 1010) d2.addCallback(_check_attrs) @@ -521,54 +529,90 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d = self._set_up("openFile_write") d.addCallback(lambda ign: self._set_up_tree()) + # '' is an invalid filename d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_NO_SUCH_FILE, "openFile '' WRITE|CREAT|TRUNC", self.handler.openFile, "", sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_TRUNC, {})) + + # TRUNC is not valid without CREAT d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_BAD_MESSAGE, "openFile newfile WRITE|TRUNC", self.handler.openFile, "newfile", sftp.FXF_WRITE | sftp.FXF_TRUNC, {})) + + # EXCL is not valid without CREAT d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_BAD_MESSAGE, "openFile small WRITE|EXCL", self.handler.openFile, "small", sftp.FXF_WRITE | sftp.FXF_EXCL, {})) + + # cannot write to an existing directory d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile tiny_lit_dir WRITE", self.handler.openFile, "tiny_lit_dir", sftp.FXF_WRITE, {})) + + # cannot write to an existing unknown d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile unknown WRITE", self.handler.openFile, "unknown", sftp.FXF_WRITE, {})) + + # cannot write to a new file in an immutable directory d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile tiny_lit_dir/newfile WRITE|CREAT|TRUNC", self.handler.openFile, "tiny_lit_dir/newfile", sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_TRUNC, {})) + + # cannot write to an existing immutable file in an immutable directory (with or without CREAT and EXCL) d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile tiny_lit_dir/short WRITE", self.handler.openFile, "tiny_lit_dir/short", sftp.FXF_WRITE, {})) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile tiny_lit_dir/short WRITE|CREAT|EXCL", + self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile tiny_lit_dir/short WRITE|CREAT", self.handler.openFile, "tiny_lit_dir/short", - sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) + sftp.FXF_WRITE | sftp.FXF_CREAT, {})) + + # cannot write to a mutable file via a readonly cap (by path or uri) d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile readonly WRITE", self.handler.openFile, "readonly", sftp.FXF_WRITE, {})) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile small WRITE|CREAT|EXCL", + self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile readonly uri WRITE", + self.handler.openFile, "uri/"+self.readonly_uri, sftp.FXF_WRITE, {})) + + # cannot create a file with the EXCL flag if it already exists + d.addCallback(lambda ign: + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "openFile small WRITE|CREAT|EXCL", self.handler.openFile, "small", sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile readonly uri WRITE", - self.handler.openFile, "uri/"+self.readonly_uri, sftp.FXF_WRITE, {})) + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "openFile mutable WRITE|CREAT|EXCL", + self.handler.openFile, "mutable", + sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) + d.addCallback(lambda ign: + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "openFile mutable uri WRITE|CREAT|EXCL", + self.handler.openFile, "uri/"+self.mutable_uri, + sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) + d.addCallback(lambda ign: + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "openFile tiny_lit_dir/short WRITE|CREAT|EXCL", + self.handler.openFile, "tiny_lit_dir/short", + sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) + + # cannot write to an immutable file if we don't have its parent (with or without CREAT, TRUNC, or EXCL) d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile small uri WRITE", self.handler.openFile, "uri/"+self.small_uri, sftp.FXF_WRITE, {})) + d.addCallback(lambda ign: + self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile small uri WRITE|CREAT", + self.handler.openFile, "uri/"+self.small_uri, + sftp.FXF_WRITE | sftp.FXF_CREAT, {})) d.addCallback(lambda ign: self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile small uri WRITE|CREAT|TRUNC", self.handler.openFile, "uri/"+self.small_uri, sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_TRUNC, {})) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile mutable uri WRITE|CREAT|EXCL", - self.handler.openFile, "uri/"+self.mutable_uri, + self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "openFile small uri WRITE|CREAT|EXCL", + self.handler.openFile, "uri/"+self.small_uri, sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_EXCL, {})) + # test creating a new file with truncation d.addCallback(lambda ign: self.handler.openFile("newfile", sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_TRUNC, {})) def _write(wf): @@ -580,7 +624,7 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda ign: wf.getAttrs()) def _check_attrs(attrs): - self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0440) #FIXME + self.failUnlessReallyEqual(attrs['permissions'], S_IFREG | 0666) self.failUnlessReallyEqual(attrs['size'], 16) d2.addCallback(_check_attrs) @@ -614,7 +658,7 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d.addCallback(lambda node: download_to_data(node)) d.addCallback(lambda data: self.failUnlessReallyEqual(data, "012345670123\x00a")) - # test APPEND flag, and also replacing an existing file ("newfile") + # test APPEND flag, and also replacing an existing file ("newfile" created by the previous test) d.addCallback(lambda ign: self.handler.openFile("newfile", sftp.FXF_WRITE | sftp.FXF_CREAT | sftp.FXF_TRUNC | sftp.FXF_APPEND, {})) @@ -655,12 +699,16 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "")) # FIXME: no API to get the best version number exists (fix as part of #993) - #stash = {} - #d2.addCallback(lambda ign: self.root.get_best_version_number()) - #d2.addCallback(lambda version: stash['version'] = version) + """ + d2.addCallback(lambda ign: self.root.get_best_version_number()) + def _check_version(version): + d3 = wf.close() + d3.addCallback(lambda ign: self.root.get_best_version_number()) + d3.addCallback(lambda new_version: self.failUnlessReallyEqual(new_version, version)) + return d3 + d2.addCallback(_check_version) + """ d2.addCallback(lambda ign: wf.close()) - #d2.addCallback(lambda ign: self.root.get_best_version_number()) - #d2.addCallback(lambda new_version: self.failUnlessReallyEqual(new_version, stash['version']) return d2 d.addCallback(_write_excl_zerolength) d.addCallback(lambda ign: self.root.get(u"zerolength")) @@ -847,13 +895,13 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): # renaming a file onto an existing file, directory or unknown should fail d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "renameFile small small2", + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "renameFile small small2", self.handler.renameFile, "small", "small2")) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "renameFile small tiny_lit_dir", + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "renameFile small tiny_lit_dir", self.handler.renameFile, "small", "tiny_lit_dir")) d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "renameFile small unknown", + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "renameFile small unknown", self.handler.renameFile, "small", "unknown")) # renaming a file to a correct path should succeed @@ -919,7 +967,7 @@ class Handler(GridTestMixin, ShouldFailMixin, unittest.TestCase): # should fail because there is an existing file "small" d.addCallback(lambda ign: - self.shouldFailWithSFTPError(sftp.FX_PERMISSION_DENIED, "makeDirectory small", + self.shouldFailWithSFTPError(sftp.FX_FAILURE, "makeDirectory small", self.handler.makeDirectory, "small", {})) return d