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809004689a
Signed-Off-By: Jelmer Vernooij <jelmer@samba.org> Autobuild-User(master): Jelmer Vernooij <jelmer@samba.org> Autobuild-Date(master): Tue Sep 25 22:40:39 CEST 2012 on sn-devel-104
590 lines
16 KiB
C
590 lines
16 KiB
C
/*
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Unix SMB/CIFS implementation.
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Python interface to ntdb. Simply modified from tdb version.
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Copyright (C) 2004-2006 Tim Potter <tpot@samba.org>
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Copyright (C) 2007-2008 Jelmer Vernooij <jelmer@samba.org>
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Copyright (C) 2011 Rusty Russell <rusty@rustcorp.com.au>
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** NOTE! The following LGPL license applies to the ntdb
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** library. This does NOT imply that all of Samba is released
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** under the LGPL
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <Python.h>
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#include "replace.h"
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#include "system/filesys.h"
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#ifndef Py_RETURN_NONE
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#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
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#endif
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/* Include ntdb headers */
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#include <ntdb.h>
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typedef struct {
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PyObject_HEAD
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struct ntdb_context *ctx;
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bool closed;
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} PyNtdbObject;
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staticforward PyTypeObject PyNtdb;
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static void PyErr_SetTDBError(enum NTDB_ERROR e)
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{
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PyErr_SetObject(PyExc_RuntimeError,
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Py_BuildValue("(i,s)", e, ntdb_errorstr(e)));
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}
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static NTDB_DATA PyString_AsNtdb_Data(PyObject *data)
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{
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NTDB_DATA ret;
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ret.dptr = (unsigned char *)PyString_AsString(data);
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ret.dsize = PyString_Size(data);
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return ret;
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}
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static PyObject *PyString_FromNtdb_Data(NTDB_DATA data)
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{
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PyObject *ret = PyString_FromStringAndSize((const char *)data.dptr,
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data.dsize);
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free(data.dptr);
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return ret;
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}
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#define PyErr_NTDB_ERROR_IS_ERR_RAISE(ret) \
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if (ret != NTDB_SUCCESS) { \
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PyErr_SetTDBError(ret); \
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return NULL; \
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}
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static void stderr_log(struct ntdb_context *ntdb,
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enum ntdb_log_level level,
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enum NTDB_ERROR ecode,
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const char *message,
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void *data)
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{
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fprintf(stderr, "%s:%s:%s\n",
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ntdb_name(ntdb), ntdb_errorstr(ecode), message);
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}
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static PyObject *py_ntdb_open(PyTypeObject *type, PyObject *args, PyObject *kwargs)
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{
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char *name = NULL;
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int ntdb_flags = NTDB_DEFAULT, flags = O_RDWR, mode = 0600;
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struct ntdb_context *ctx;
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PyNtdbObject *ret;
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union ntdb_attribute logattr;
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const char *kwnames[] = { "name", "ntdb_flags", "flags", "mode", NULL };
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if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|siii", cast_const2(char **, kwnames), &name, &ntdb_flags, &flags, &mode))
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return NULL;
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if (name == NULL) {
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ntdb_flags |= NTDB_INTERNAL;
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}
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logattr.log.base.attr = NTDB_ATTRIBUTE_LOG;
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logattr.log.base.next = NULL;
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logattr.log.fn = stderr_log;
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ctx = ntdb_open(name, ntdb_flags, flags, mode, &logattr);
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if (ctx == NULL) {
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PyErr_SetFromErrno(PyExc_IOError);
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return NULL;
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}
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ret = PyObject_New(PyNtdbObject, &PyNtdb);
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if (!ret) {
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ntdb_close(ctx);
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return NULL;
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}
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ret->ctx = ctx;
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ret->closed = false;
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return (PyObject *)ret;
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}
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static PyObject *obj_transaction_cancel(PyNtdbObject *self)
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{
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ntdb_transaction_cancel(self->ctx);
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Py_RETURN_NONE;
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}
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static PyObject *obj_transaction_commit(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_transaction_commit(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_transaction_prepare_commit(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_transaction_prepare_commit(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_transaction_start(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_transaction_start(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_lockall(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_lockall(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_unlockall(PyNtdbObject *self)
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{
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ntdb_unlockall(self->ctx);
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Py_RETURN_NONE;
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}
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static PyObject *obj_lockall_read(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_lockall_read(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_unlockall_read(PyNtdbObject *self)
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{
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ntdb_unlockall_read(self->ctx);
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Py_RETURN_NONE;
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}
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static PyObject *obj_close(PyNtdbObject *self)
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{
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int ret;
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if (self->closed)
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Py_RETURN_NONE;
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ret = ntdb_close(self->ctx);
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self->closed = true;
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if (ret != 0) {
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PyErr_SetTDBError(NTDB_ERR_IO);
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return NULL;
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}
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Py_RETURN_NONE;
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}
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static PyObject *obj_get(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key, data;
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PyObject *py_key;
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enum NTDB_ERROR ret;
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if (!PyArg_ParseTuple(args, "O", &py_key))
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return NULL;
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key = PyString_AsNtdb_Data(py_key);
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ret = ntdb_fetch(self->ctx, key, &data);
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if (ret == NTDB_ERR_NOEXIST)
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Py_RETURN_NONE;
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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return PyString_FromNtdb_Data(data);
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}
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static PyObject *obj_append(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key, data;
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PyObject *py_key, *py_data;
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enum NTDB_ERROR ret;
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if (!PyArg_ParseTuple(args, "OO", &py_key, &py_data))
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return NULL;
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key = PyString_AsNtdb_Data(py_key);
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data = PyString_AsNtdb_Data(py_data);
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ret = ntdb_append(self->ctx, key, data);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_firstkey(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret;
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NTDB_DATA key;
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ret = ntdb_firstkey(self->ctx, &key);
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if (ret == NTDB_ERR_NOEXIST)
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Py_RETURN_NONE;
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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return PyString_FromNtdb_Data(key);
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}
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static PyObject *obj_nextkey(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key;
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PyObject *py_key;
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enum NTDB_ERROR ret;
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if (!PyArg_ParseTuple(args, "O", &py_key))
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return NULL;
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/* Malloc here, since ntdb_nextkey frees. */
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key.dsize = PyString_Size(py_key);
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key.dptr = malloc(key.dsize);
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memcpy(key.dptr, PyString_AsString(py_key), key.dsize);
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ret = ntdb_nextkey(self->ctx, &key);
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if (ret == NTDB_ERR_NOEXIST)
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Py_RETURN_NONE;
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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return PyString_FromNtdb_Data(key);
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}
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static PyObject *obj_delete(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key;
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PyObject *py_key;
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enum NTDB_ERROR ret;
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if (!PyArg_ParseTuple(args, "O", &py_key))
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return NULL;
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key = PyString_AsNtdb_Data(py_key);
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ret = ntdb_delete(self->ctx, key);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_has_key(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key;
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PyObject *py_key;
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if (!PyArg_ParseTuple(args, "O", &py_key))
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return NULL;
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key = PyString_AsNtdb_Data(py_key);
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if (ntdb_exists(self->ctx, key))
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return Py_True;
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return Py_False;
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}
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static PyObject *obj_store(PyNtdbObject *self, PyObject *args)
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{
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NTDB_DATA key, value;
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enum NTDB_ERROR ret;
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int flag = NTDB_REPLACE;
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PyObject *py_key, *py_value;
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if (!PyArg_ParseTuple(args, "OO|i", &py_key, &py_value, &flag))
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return NULL;
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key = PyString_AsNtdb_Data(py_key);
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value = PyString_AsNtdb_Data(py_value);
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ret = ntdb_store(self->ctx, key, value, flag);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_add_flag(PyNtdbObject *self, PyObject *args)
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{
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unsigned flag;
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if (!PyArg_ParseTuple(args, "I", &flag))
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return NULL;
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ntdb_add_flag(self->ctx, flag);
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Py_RETURN_NONE;
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}
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static PyObject *obj_remove_flag(PyNtdbObject *self, PyObject *args)
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{
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unsigned flag;
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if (!PyArg_ParseTuple(args, "I", &flag))
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return NULL;
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ntdb_remove_flag(self->ctx, flag);
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Py_RETURN_NONE;
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}
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typedef struct {
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PyObject_HEAD
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NTDB_DATA current;
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bool end;
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PyNtdbObject *iteratee;
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} PyNtdbIteratorObject;
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static PyObject *ntdb_iter_next(PyNtdbIteratorObject *self)
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{
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enum NTDB_ERROR e;
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PyObject *ret;
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if (self->end)
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return NULL;
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ret = PyString_FromStringAndSize((const char *)self->current.dptr,
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self->current.dsize);
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e = ntdb_nextkey(self->iteratee->ctx, &self->current);
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if (e == NTDB_ERR_NOEXIST)
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self->end = true;
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else
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PyErr_NTDB_ERROR_IS_ERR_RAISE(e);
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return ret;
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}
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static void ntdb_iter_dealloc(PyNtdbIteratorObject *self)
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{
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Py_DECREF(self->iteratee);
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PyObject_Del(self);
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}
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PyTypeObject PyNtdbIterator = {
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.tp_name = "Iterator",
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.tp_basicsize = sizeof(PyNtdbIteratorObject),
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.tp_iternext = (iternextfunc)ntdb_iter_next,
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.tp_dealloc = (destructor)ntdb_iter_dealloc,
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.tp_flags = Py_TPFLAGS_DEFAULT,
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.tp_iter = PyObject_SelfIter,
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};
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static PyObject *ntdb_object_iter(PyNtdbObject *self)
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{
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PyNtdbIteratorObject *ret;
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enum NTDB_ERROR e;
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ret = PyObject_New(PyNtdbIteratorObject, &PyNtdbIterator);
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if (!ret)
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return NULL;
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e = ntdb_firstkey(self->ctx, &ret->current);
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if (e == NTDB_ERR_NOEXIST) {
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ret->end = true;
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} else {
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PyErr_NTDB_ERROR_IS_ERR_RAISE(e);
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ret->end = false;
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}
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ret->iteratee = self;
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Py_INCREF(self);
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return (PyObject *)ret;
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}
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static PyObject *obj_clear(PyNtdbObject *self)
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{
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enum NTDB_ERROR ret = ntdb_wipe_all(self->ctx);
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PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
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Py_RETURN_NONE;
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}
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static PyObject *obj_enable_seqnum(PyNtdbObject *self)
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{
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ntdb_add_flag(self->ctx, NTDB_SEQNUM);
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Py_RETURN_NONE;
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}
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static PyMethodDef ntdb_object_methods[] = {
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{ "transaction_cancel", (PyCFunction)obj_transaction_cancel, METH_NOARGS,
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"S.transaction_cancel() -> None\n"
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"Cancel the currently active transaction." },
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{ "transaction_commit", (PyCFunction)obj_transaction_commit, METH_NOARGS,
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"S.transaction_commit() -> None\n"
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"Commit the currently active transaction." },
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{ "transaction_prepare_commit", (PyCFunction)obj_transaction_prepare_commit, METH_NOARGS,
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"S.transaction_prepare_commit() -> None\n"
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"Prepare to commit the currently active transaction" },
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{ "transaction_start", (PyCFunction)obj_transaction_start, METH_NOARGS,
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"S.transaction_start() -> None\n"
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"Start a new transaction." },
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{ "lock_all", (PyCFunction)obj_lockall, METH_NOARGS, NULL },
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{ "unlock_all", (PyCFunction)obj_unlockall, METH_NOARGS, NULL },
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{ "read_lock_all", (PyCFunction)obj_lockall_read, METH_NOARGS, NULL },
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{ "read_unlock_all", (PyCFunction)obj_unlockall_read, METH_NOARGS, NULL },
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{ "close", (PyCFunction)obj_close, METH_NOARGS, NULL },
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{ "get", (PyCFunction)obj_get, METH_VARARGS, "S.get(key) -> value\n"
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"Fetch a value." },
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{ "append", (PyCFunction)obj_append, METH_VARARGS, "S.append(key, value) -> None\n"
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"Append data to an existing key." },
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{ "firstkey", (PyCFunction)obj_firstkey, METH_NOARGS, "S.firstkey() -> data\n"
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"Return the first key in this database." },
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{ "nextkey", (PyCFunction)obj_nextkey, METH_NOARGS, "S.nextkey(key) -> data\n"
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"Return the next key in this database." },
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{ "delete", (PyCFunction)obj_delete, METH_VARARGS, "S.delete(key) -> None\n"
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"Delete an entry." },
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{ "has_key", (PyCFunction)obj_has_key, METH_VARARGS, "S.has_key(key) -> None\n"
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"Check whether key exists in this database." },
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{ "store", (PyCFunction)obj_store, METH_VARARGS, "S.store(key, data, flag=REPLACE) -> None"
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"Store data." },
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{ "add_flag", (PyCFunction)obj_add_flag, METH_VARARGS, "S.add_flag(flag) -> None" },
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{ "remove_flag", (PyCFunction)obj_remove_flag, METH_VARARGS, "S.remove_flag(flag) -> None" },
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{ "iterkeys", (PyCFunction)ntdb_object_iter, METH_NOARGS, "S.iterkeys() -> iterator" },
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{ "clear", (PyCFunction)obj_clear, METH_NOARGS, "S.clear() -> None\n"
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"Wipe the entire database." },
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{ "enable_seqnum", (PyCFunction)obj_enable_seqnum, METH_NOARGS,
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"S.enable_seqnum() -> None" },
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{ NULL }
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};
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static PyObject *obj_get_flags(PyNtdbObject *self, void *closure)
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{
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return PyInt_FromLong(ntdb_get_flags(self->ctx));
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}
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static PyObject *obj_get_filename(PyNtdbObject *self, void *closure)
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{
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return PyString_FromString(ntdb_name(self->ctx));
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}
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static PyObject *obj_get_seqnum(PyNtdbObject *self, void *closure)
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{
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return PyInt_FromLong(ntdb_get_seqnum(self->ctx));
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}
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static PyGetSetDef ntdb_object_getsetters[] = {
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{ cast_const(char *, "flags"), (getter)obj_get_flags, NULL, NULL },
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{ cast_const(char *, "filename"), (getter)obj_get_filename, NULL,
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cast_const(char *, "The filename of this NTDB file.")},
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{ cast_const(char *, "seqnum"), (getter)obj_get_seqnum, NULL, NULL },
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{ NULL }
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};
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static PyObject *ntdb_object_repr(PyNtdbObject *self)
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{
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if (ntdb_get_flags(self->ctx) & NTDB_INTERNAL) {
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return PyString_FromString("Ntdb(<internal>)");
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} else {
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return PyString_FromFormat("Ntdb('%s')", ntdb_name(self->ctx));
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}
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}
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static void ntdb_object_dealloc(PyNtdbObject *self)
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{
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if (!self->closed)
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ntdb_close(self->ctx);
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self->ob_type->tp_free(self);
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}
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static PyObject *obj_getitem(PyNtdbObject *self, PyObject *key)
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{
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NTDB_DATA tkey, val;
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enum NTDB_ERROR ret;
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if (!PyString_Check(key)) {
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|
PyErr_SetString(PyExc_TypeError, "Expected string as key");
|
|
return NULL;
|
|
}
|
|
|
|
tkey.dptr = (unsigned char *)PyString_AsString(key);
|
|
tkey.dsize = PyString_Size(key);
|
|
|
|
ret = ntdb_fetch(self->ctx, tkey, &val);
|
|
if (ret == NTDB_ERR_NOEXIST) {
|
|
PyErr_SetString(PyExc_KeyError, "No such NTDB entry");
|
|
return NULL;
|
|
} else {
|
|
PyErr_NTDB_ERROR_IS_ERR_RAISE(ret);
|
|
return PyString_FromNtdb_Data(val);
|
|
}
|
|
}
|
|
|
|
static int obj_setitem(PyNtdbObject *self, PyObject *key, PyObject *value)
|
|
{
|
|
NTDB_DATA tkey, tval;
|
|
enum NTDB_ERROR ret;
|
|
if (!PyString_Check(key)) {
|
|
PyErr_SetString(PyExc_TypeError, "Expected string as key");
|
|
return -1;
|
|
}
|
|
|
|
tkey = PyString_AsNtdb_Data(key);
|
|
|
|
if (value == NULL) {
|
|
ret = ntdb_delete(self->ctx, tkey);
|
|
} else {
|
|
if (!PyString_Check(value)) {
|
|
PyErr_SetString(PyExc_TypeError, "Expected string as value");
|
|
return -1;
|
|
}
|
|
|
|
tval = PyString_AsNtdb_Data(value);
|
|
|
|
ret = ntdb_store(self->ctx, tkey, tval, NTDB_REPLACE);
|
|
}
|
|
|
|
if (ret != NTDB_SUCCESS) {
|
|
PyErr_SetTDBError(ret);
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static PyMappingMethods ntdb_object_mapping = {
|
|
.mp_subscript = (binaryfunc)obj_getitem,
|
|
.mp_ass_subscript = (objobjargproc)obj_setitem,
|
|
};
|
|
static PyTypeObject PyNtdb = {
|
|
.tp_name = "ntdb.Ntdb",
|
|
.tp_basicsize = sizeof(PyNtdbObject),
|
|
.tp_methods = ntdb_object_methods,
|
|
.tp_getset = ntdb_object_getsetters,
|
|
.tp_new = py_ntdb_open,
|
|
.tp_doc = "A NTDB file",
|
|
.tp_repr = (reprfunc)ntdb_object_repr,
|
|
.tp_dealloc = (destructor)ntdb_object_dealloc,
|
|
.tp_as_mapping = &ntdb_object_mapping,
|
|
.tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_ITER,
|
|
.tp_iter = (getiterfunc)ntdb_object_iter,
|
|
};
|
|
|
|
static PyMethodDef ntdb_methods[] = {
|
|
{ "open", (PyCFunction)py_ntdb_open, METH_VARARGS|METH_KEYWORDS, "open(name, hash_size=0, ntdb_flags=NTDB_DEFAULT, flags=O_RDWR, mode=0600)\n"
|
|
"Open a NTDB file." },
|
|
{ NULL }
|
|
};
|
|
|
|
void initntdb(void);
|
|
void initntdb(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
if (PyType_Ready(&PyNtdb) < 0)
|
|
return;
|
|
|
|
if (PyType_Ready(&PyNtdbIterator) < 0)
|
|
return;
|
|
|
|
m = Py_InitModule3("ntdb", ntdb_methods, "NTDB is a simple key-value database similar to GDBM that supports multiple writers.");
|
|
if (m == NULL)
|
|
return;
|
|
|
|
PyModule_AddObject(m, "REPLACE", PyInt_FromLong(NTDB_REPLACE));
|
|
PyModule_AddObject(m, "INSERT", PyInt_FromLong(NTDB_INSERT));
|
|
PyModule_AddObject(m, "MODIFY", PyInt_FromLong(NTDB_MODIFY));
|
|
|
|
PyModule_AddObject(m, "DEFAULT", PyInt_FromLong(NTDB_DEFAULT));
|
|
PyModule_AddObject(m, "INTERNAL", PyInt_FromLong(NTDB_INTERNAL));
|
|
PyModule_AddObject(m, "NOLOCK", PyInt_FromLong(NTDB_NOLOCK));
|
|
PyModule_AddObject(m, "NOMMAP", PyInt_FromLong(NTDB_NOMMAP));
|
|
PyModule_AddObject(m, "CONVERT", PyInt_FromLong(NTDB_CONVERT));
|
|
PyModule_AddObject(m, "NOSYNC", PyInt_FromLong(NTDB_NOSYNC));
|
|
PyModule_AddObject(m, "SEQNUM", PyInt_FromLong(NTDB_SEQNUM));
|
|
PyModule_AddObject(m, "ALLOW_NESTING", PyInt_FromLong(NTDB_ALLOW_NESTING));
|
|
|
|
PyModule_AddObject(m, "__docformat__", PyString_FromString("restructuredText"));
|
|
|
|
PyModule_AddObject(m, "__version__", PyString_FromString(PACKAGE_VERSION));
|
|
|
|
Py_INCREF(&PyNtdb);
|
|
PyModule_AddObject(m, "Ntdb", (PyObject *)&PyNtdb);
|
|
|
|
Py_INCREF(&PyNtdbIterator);
|
|
}
|