libcli: Add python wappers to reparse_symlink.c

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/libcli/smb/py_reparse_symlink.c b/libcli/smb/py_reparse_symlink.c
new file mode 100644 (file)
index 0000000..57dc603
--- /dev/null
+++ b/libcli/smb/py_reparse_symlink.c
@@ -0,0 +1,165 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * Copyright (C) Volker Lendecke 2022
+ *
+ * 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 "replace.h"
+#include "python/modules.h"
+#include "python/py3compat.h"
+#include "reparse_symlink.h"
+
+static PyObject *py_reparse_put(PyObject *module, PyObject *args)
+{
+       char *reparse = NULL;
+       Py_ssize_t reparse_len;
+       unsigned long long tag = 0;
+       unsigned reserved = 0;
+       struct iovec iov;
+       uint8_t *buf = NULL;
+       ssize_t buflen;
+       PyObject *result = NULL;
+       bool ok;
+
+       ok = PyArg_ParseTuple(
+               args,
+               "Kk"PYARG_BYTES_LEN":put",
+               &tag,
+               &reserved,
+               &reparse,
+               &reparse_len);
+       if (!ok) {
+               return NULL;
+       }
+       iov = (struct iovec) {
+               .iov_base = reparse, .iov_len = reparse_len,
+       };
+
+       buflen = reparse_buffer_marshall(tag, reserved, &iov, 1, NULL, 0);
+       if (buflen == -1) {
+               errno = EINVAL;
+               PyErr_SetFromErrno(PyExc_RuntimeError);
+               return NULL;
+       }
+       buf = talloc_array(NULL, uint8_t, buflen);
+       if (buf == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+       reparse_buffer_marshall(tag, reserved, &iov, 1, buf, buflen);
+
+       result = PyBytes_FromStringAndSize((char *)buf, buflen);
+       TALLOC_FREE(buf);
+       return result;
+}
+
+static PyObject *py_reparse_symlink_put(PyObject *module, PyObject *args)
+{
+       char *substitute = NULL;
+       char *printname = NULL;
+       int unparsed = 0;
+       int flags = 0;
+       uint8_t *buf = NULL;
+       size_t buflen;
+       PyObject *result = NULL;
+       bool ok;
+
+       ok = PyArg_ParseTuple(
+               args,
+               "ssii:symlink_put",
+               &substitute,
+               &printname,
+               &unparsed,
+               &flags);
+       if (!ok) {
+               return NULL;
+       }
+
+       ok = symlink_reparse_buffer_marshall(
+               substitute, printname, unparsed, flags, NULL, &buf, &buflen);
+       if (!ok) {
+               PyErr_NoMemory();
+               return false;
+       }
+
+       result = PyBytes_FromStringAndSize((char *)buf, buflen);
+       TALLOC_FREE(buf);
+       return result;
+}
+
+static PyObject *py_reparse_symlink_get(PyObject *module, PyObject *args)
+{
+       char *buf = NULL;
+       Py_ssize_t buflen;
+       struct symlink_reparse_struct *syml = NULL;
+       PyObject *result = NULL;
+       bool ok;
+
+       ok = PyArg_ParseTuple(args, PYARG_BYTES_LEN ":get", &buf, &buflen);
+       if (!ok) {
+               return NULL;
+       }
+
+       syml = symlink_reparse_buffer_parse(NULL, (uint8_t *)buf, buflen);
+       if (syml == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       result = Py_BuildValue(
+               "ssII",
+               syml->substitute_name,
+               syml->print_name,
+               (unsigned)syml->unparsed_path_length,
+               (unsigned)syml->flags);
+       TALLOC_FREE(syml);
+       return result;
+}
+
+static PyMethodDef py_reparse_symlink_methods[] = {
+       { "put",
+         PY_DISCARD_FUNC_SIG(PyCFunction, py_reparse_put),
+         METH_VARARGS,
+         "Create a reparse point blob"},
+       { "symlink_put",
+         PY_DISCARD_FUNC_SIG(PyCFunction, py_reparse_symlink_put),
+         METH_VARARGS,
+         "Create a reparse symlink blob"},
+       { "symlink_get",
+         PY_DISCARD_FUNC_SIG(PyCFunction, py_reparse_symlink_get),
+         METH_VARARGS,
+         "Parse a reparse symlink blob"},
+       {0},
+};
+
+static struct PyModuleDef moduledef = {
+       PyModuleDef_HEAD_INIT,
+       .m_name = "reparse_symlink",
+       .m_doc = "[un]marshall reparse symlink blobs",
+       .m_size = -1,
+       .m_methods = py_reparse_symlink_methods,
+};
+
+MODULE_INIT_FUNC(reparse_symlink)
+{
+       PyObject *m;
+
+       m = PyModule_Create(&moduledef);
+       if (m == NULL)
+               return NULL;
+
+       return m;
+}

diff --git a/libcli/smb/wscript b/libcli/smb/wscript
index 0c9b38ca29913a4cdc54b5c6c91c2bed8eab2414..3c49dc4f0ddf3cce6d4c2099ac43900cfaec9d34 100644 (file)
--- a/libcli/smb/wscript
+++ b/libcli/smb/wscript
@@ -78,3 +78,9 @@ def build(bld):
                      source='test_util_translate.c',
                      deps='cmocka cli_smb_common',
                      for_selftest=True)
+
+    bld.SAMBA_PYTHON('py_reparse_symlink',
+                     source='py_reparse_symlink.c',
+                     deps='cli_smb_common',
+                     realname='samba/reparse_symlink.so'
+                     )