s4: add python bindings for wrap_(s|g)etxattr

4 files changed, 286 insertions, 2 deletions

diff --git a/source4/scripting/python/config.mk b/source4/scripting/python/config.mk
index 3d255de00e..2aae592674 100644
--- a/source4/scripting/python/config.mk
+++ b/source4/scripting/python/config.mk
@@ -23,6 +23,27 @@ python_glue_OBJ_FILES = $(pyscriptsrcdir)/pyglue.o
 
 $(python_glue_OBJ_FILES): CFLAGS+=-I$(ldbsrcdir)
 
+[PYTHON::python_xattr_native]
+LIBRARY_REALNAME = samba/xattr_native.$(SHLIBEXT)
+PRIVATE_DEPENDENCIES = LIBNDR LIBLDB SAMDB CREDENTIALS  python_dcerpc_security pyparam_util WRAP_XATTR
+
+python_xattr_native_OBJ_FILES = $(pyscriptsrcdir)/pyxattr_native.o
+
+$(python_xattr_native_OBJ_FILES): CFLAGS+=-I$(ldbsrcdir)
+
+#ntvfs_common pvfs_acl
+#$(ntvfs_posix_OBJ_FILES)
+[PYTHON::python_xattr_tdb]
+LIBRARY_REALNAME = samba/xattr_tdb.$(SHLIBEXT)
+PRIVATE_DEPENDENCIES = LIBNDR LIBLDB python_dcerpc_security pyparam_util share
+#dcerpc_server
+
+python_xattr_tdb_OBJ_FILES = $(pyscriptsrcdir)/pyxattr_tdb.o  $(ntvfssrcdir)/posix/xattr_tdb.o
+#{$(ntvfssrcdir)/ntvfs_interface.o
+#$(ntvfs_posix_OBJ_FILES)
+
+$(python_xattr_tdb_OBJ_FILES): CFLAGS+=-I$(ldbsrcdir)
+
 _PY_FILES = $(shell find $(pyscriptsrcdir)/samba ../lib/subunit/python -name "*.py")
 
 $(eval $(foreach pyfile, $(_PY_FILES),$(call python_py_module_template,$(patsubst $(pyscriptsrcdir)/%,%,$(subst ../lib/subunit/python,,$(pyfile))),$(pyfile))))
diff --git a/source4/scripting/python/pyglue.c b/source4/scripting/python/pyglue.c
index 3d33e605db..6ef7033128 100644
--- a/source4/scripting/python/pyglue.c
+++ b/source4/scripting/python/pyglue.c
@@ -54,8 +54,8 @@ static void PyErr_SetLdbError(PyObject *error, int ret, struct ldb_context *ldb_
 		return; /* Python exception should already be set, just keep that */
 
 	PyErr_SetObject(error, 
-					Py_BuildValue(discard_const_p(char, "(i,s)"), ret, 
-				  ldb_ctx == NULL?ldb_strerror(ret):ldb_errstring(ldb_ctx)));
+			Py_BuildValue(discard_const_p(char, "(i,s)"), ret,
+			ldb_ctx == NULL?ldb_strerror(ret):ldb_errstring(ldb_ctx)));
 }
 
 static PyObject *py_ldb_get_exception(void)
diff --git a/source4/scripting/python/pyxattr_native.c b/source4/scripting/python/pyxattr_native.c
new file mode 100644
index 0000000000..7cff42cebe
--- /dev/null
+++ b/source4/scripting/python/pyxattr_native.c
@@ -0,0 +1,130 @@
+/*
+   Unix SMB/CIFS implementation. Xattr manipulation bindings.
+   Copyright (C) Matthieu Patou <mat@matws.net> 2009
+   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 "version.h"
+#include "includes.h"
+#include "librpc/ndr/libndr.h"
+#include "lib/util/wrap_xattr.h"
+
+#ifndef Py_RETURN_NONE
+#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
+#endif
+
+static PyObject  *py_is_xattr_supported(PyObject *self)
+{
+#if !defined(HAVE_XATTR_SUPPORT)
+	return Py_False;
+#else
+	return Py_True;
+#endif
+}
+static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
+{
+	char *filename, *attribute;
+	int ret = 0;
+	int blobsize;
+	DATA_BLOB blob;
+
+	if (!PyArg_ParseTuple(args, "sss#", &filename,&attribute,&blob.data,&blobsize))
+		return NULL;
+
+	blob.length = blobsize;
+	ret = wrap_setxattr(filename,attribute,blob.data,blob.length,0);
+	if( ret < 0 ) {
+		if (errno == ENOTSUP) {
+			PyErr_SetString(PyExc_IOError, strerror(errno));
+		} else {
+			PyErr_SetString(PyExc_TypeError, strerror(errno));
+		}
+		return NULL;
+	}
+	Py_RETURN_NONE;
+}
+
+static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
+{
+	char *filename, *attribute;
+	int len;
+	TALLOC_CTX *mem_ctx;
+	uint8_t *buf;
+	PyObject *ret;
+	if (!PyArg_ParseTuple(args, "ss", &filename,&attribute))
+		return NULL;
+	mem_ctx = talloc_new(NULL);
+	len = wrap_getxattr(filename,attribute,NULL,0);
+	if( len < 0 ) {
+		if (errno == ENOTSUP) {
+			PyErr_SetString(PyExc_IOError, strerror(errno));
+		} else {
+			PyErr_SetString(PyExc_TypeError, strerror(errno));
+		}
+		return NULL;
+	}
+	/* check length ... */
+	buf = talloc_zero_array(mem_ctx, uint8_t, len);
+	len = wrap_getxattr(filename,attribute,buf,len);
+	if( len < 0 ) {
+		if (errno == ENOTSUP) {
+			PyErr_SetString(PyExc_IOError, strerror(errno));
+		} else {
+			PyErr_SetString(PyExc_TypeError, strerror(errno));
+		}
+		return NULL;
+	}
+	ret = PyString_FromStringAndSize(buf,len);
+	talloc_free(buf);
+	return ret;
+}
+
+static PyMethodDef py_xattr_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 initxattr_native(void)
+{
+	PyObject *m;
+
+	m = Py_InitModule3("xattr_native", py_xattr_methods,
+			   "Python bindings for xattr manipulation.");
+	if (m == NULL)
+		return;
+
+	PyModule_AddObject(m, "version", PyString_FromString(SAMBA_VERSION_STRING));
+
+	/* one of the most annoying things about python scripts is
+	   that they don't die when you hit control-C. This fixes that
+	   sillyness. As we do all database operations using
+	   transactions, this is also safe. In fact, not dying
+	   immediately is unsafe as we could end up treating the
+	   control-C exception as a different error and try to modify
+	   as database incorrectly
+	*/
+	signal(SIGINT, SIG_DFL);
+}
+
diff --git a/source4/scripting/python/pyxattr_tdb.c b/source4/scripting/python/pyxattr_tdb.c
new file mode 100644
index 0000000000..19b4f417a8
--- /dev/null
+++ b/source4/scripting/python/pyxattr_tdb.c
@@ -0,0 +1,133 @@
+/*
+   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 "version.h"
+#include "includes.h"
+#include "../tdb/include/tdb.h"
+#include "tdb_wrap.h"
+#include "librpc/ndr/libndr.h"
+#include "lib/util/wrap_xattr.h"
+#include "ntvfs/posix/vfs_posix.h"
+
+#ifndef Py_RETURN_NONE
+#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
+#endif
+
+static PyObject  *py_is_xattr_supported(PyObject *self)
+{
+/*#if !defined(HAVE_XATTR_SUPPORT)
+	return Py_False;
+#else
+	return Py_True;
+#endif*/
+	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);
+
+	if (eadb == NULL) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		return NULL;
+	}	status = push_xattr_blob_tdb_raw(eadb,mem_ctx,attribute,filename,-1,&blob);
+	if( !NT_STATUS_IS_OK(status) ) {
+		PyErr_SetString(PyExc_TypeError, strerror(errno));
+		return NULL;
+	}
+	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);
+	if (eadb == NULL) {
+
+		PyErr_SetFromErrno(PyExc_IOError);
+		return NULL;
+	}
+	status = pull_xattr_blob_tdb_raw(eadb,mem_ctx,attribute,filename,-1,100,&blob);
+	if( !NT_STATUS_IS_OK(status) || blob.length < 0 ) {
+		PyErr_SetString(PyExc_TypeError, get_friendly_nt_error_msg(status));
+		return NULL;
+	}
+	ret = PyString_FromStringAndSize(blob.data,blob.length);
+	return ret;
+}
+
+static PyMethodDef py_xattr_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 backed by tdb are supported on this system\n"},
+	{ NULL }
+};
+
+void initxattr_tdb(void)
+{
+	PyObject *m;
+
+	m = Py_InitModule3("xattr_tdb", py_xattr_methods,
+			   "Python bindings for xattr manipulation.");
+	if (m == NULL)
+		return;
+
+	PyModule_AddObject(m, "version", PyString_FromString(SAMBA_VERSION_STRING));
+
+	/* one of the most annoying things about python scripts is
+	   that they don't die when you hit control-C. This fixes that
+	   sillyness. As we do all database operations using
+	   transactions, this is also safe. In fact, not dying
+	   immediately is unsafe as we could end up treating the
+	   control-C exception as a different error and try to modify
+	   as database incorrectly
+	*/
+	signal(SIGINT, SIG_DFL);
+}
+