s4-python: Add python wrapper for xattr_tdb format xattr storage

This uses the format used by the vfs_xattr_tdb module.  The s4
posix:eadb format is kept, just in a new file and module.

Andrew Bartlett

1 files changed, 126 insertions, 0 deletions

diff --git a/source4/ntvfs/posix/python/pyposix_eadb.c b/source4/ntvfs/posix/python/pyposix_eadb.c
new file mode 100644
index 0000000000..226160f88d
--- /dev/null
+++ b/source4/ntvfs/posix/python/pyposix_eadb.c
@@ -0,0 +1,126 @@
+/*
+   Unix SMB/CIFS implementation. Xattr manipulation bindings.
+   Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
+   Base on work of pyglue.c by Jelmer Vernooij <jelmer@samba.org> 2007 and
+    Matthias Dieter Wallnöfer 2009
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Python.h>
+#include "includes.h"
+#include "system/filesys.h"
+#include "tdb_compat.h"
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include "librpc/ndr/libndr.h"
+#include "lib/util/wrap_xattr.h"
+#include "ntvfs/posix/posix_eadb.h"
+#include "libcli/util/pyerrors.h"
+#include "param/pyparam.h"
+
+void initxattr_tdb(void);
+
+static PyObject *py_is_xattr_supported(PyObject *self)
+{
+	return Py_True;
+}
+
+static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
+{
+	char *filename, *attribute, *tdbname;
+	DATA_BLOB blob;
+	int blobsize;
+	NTSTATUS status;
+	TALLOC_CTX *mem_ctx;
+	struct tdb_wrap *eadb;
+
+	if (!PyArg_ParseTuple(args, "ssss#", &tdbname, &filename, &attribute,
+						  &blob.data, &blobsize))
+		return NULL;
+
+	blob.length = blobsize;
+	mem_ctx = talloc_new(NULL);
+	eadb = tdb_wrap_open(mem_ctx, tdbname, 50000,
+			     TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
+			     py_default_loadparm_context(mem_ctx));
+
+	if (eadb == NULL) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		talloc_free(mem_ctx);
+		return NULL;
+	}
+	status = push_xattr_blob_tdb_raw(eadb, attribute, filename, -1,
+					 &blob);
+	if (!NT_STATUS_IS_OK(status)) {
+		PyErr_SetNTSTATUS(status);
+		talloc_free(mem_ctx);
+		return NULL;
+	}
+	talloc_free(mem_ctx);
+	Py_RETURN_NONE;
+}
+
+static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
+{
+	char *filename, *attribute, *tdbname;
+	TALLOC_CTX *mem_ctx;
+	DATA_BLOB blob;
+	PyObject *ret;
+	NTSTATUS status;
+	struct tdb_wrap *eadb = NULL;
+
+	if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
+		return NULL;
+
+	mem_ctx = talloc_new(NULL);
+	eadb = tdb_wrap_open(mem_ctx, tdbname, 50000,
+			     TDB_DEFAULT, O_RDWR|O_CREAT, 0600, py_default_loadparm_context(mem_ctx));
+	if (eadb == NULL) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		talloc_free(mem_ctx);
+		return NULL;
+	}
+	status = pull_xattr_blob_tdb_raw(eadb, mem_ctx, attribute, filename,
+									 -1, 100, &blob);
+	if (!NT_STATUS_IS_OK(status)) {
+		PyErr_SetNTSTATUS(status);
+		talloc_free(mem_ctx);
+		return NULL;
+	}
+	ret = PyString_FromStringAndSize((char *)blob.data, blob.length);
+	talloc_free(mem_ctx);
+	return ret;
+}
+
+static PyMethodDef py_posix_eadb_methods[] = {
+	{ "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
+		"wrap_getxattr(filename,attribute) -> blob\n"
+		"Retreive given attribute on the given file." },
+	{ "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
+		"wrap_setxattr(filename,attribute,value)\n"
+		"Set the given attribute to the given value on the given file." },
+	{ "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
+		"Return true if xattr are supported on this system\n"},
+	{ NULL }
+};
+
+void initposix_eadb(void)
+{
+	PyObject *m;
+
+	m = Py_InitModule3("posix_eadb", py_posix_eadb_methods,
+			   "Python bindings for xattr manipulation.");
+	if (m == NULL)
+		return;
+}