source4/ntvfs/posix/python/pyposix_eadb.c

   1 /*
   2    Unix SMB/CIFS implementation. Xattr manipulation bindings.
   3    Copyright (C) Matthieu Patou <mat@matws.net> 2009-2010
   4    Base on work of pyglue.c by Jelmer Vernooij <jelmer@samba.org> 2007 and
   5     Matthias Dieter Wallnöfer 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "lib/replace/system/python.h"
  22 #include "python/py3compat.h"
  23 #include "includes.h"
  24 #include "system/filesys.h"
  25 #include <tdb.h>
  26 #include "lib/tdb_wrap/tdb_wrap.h"
  27 #include "librpc/ndr/libndr.h"
  28 #include "ntvfs/posix/posix_eadb.h"
  29 #include "libcli/util/pyerrors.h"
  30 #include "param/pyparam.h"
  31
  32 static PyObject *py_is_xattr_supported(PyObject *self,
  33                         PyObject *Py_UNUSED(ignored))
  34 {
  35         Py_RETURN_TRUE;
  36 }
  37
  38 static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
  39 {
  40         char *filename, *attribute, *tdbname;
  41         DATA_BLOB blob;
  42         Py_ssize_t blobsize;
  43         NTSTATUS status;
  44         TALLOC_CTX *mem_ctx;
  45         struct tdb_wrap *eadb;
  46
  47         if (!PyArg_ParseTuple(args, "sss"PYARG_BYTES_LEN, &tdbname, &filename, &attribute,
  48                                                   &blob.data, &blobsize))
  49                 return NULL;
  50
  51         blob.length = blobsize;
  52         mem_ctx = talloc_new(NULL);
  53         eadb = tdb_wrap_open(
  54                 mem_ctx, tdbname, 50000,
  55                 lpcfg_tdb_flags(py_default_loadparm_context(mem_ctx),
  56                                 TDB_DEFAULT),
  57                 O_RDWR|O_CREAT, 0600);
  58
  59         if (eadb == NULL) {
  60                 PyErr_SetFromErrno(PyExc_IOError);
  61                 talloc_free(mem_ctx);
  62                 return NULL;
  63         }
  64         status = push_xattr_blob_tdb_raw(eadb, attribute, filename, -1,
  65                                          &blob);
  66         if (!NT_STATUS_IS_OK(status)) {
  67                 PyErr_SetNTSTATUS(status);
  68                 talloc_free(mem_ctx);
  69                 return NULL;
  70         }
  71         talloc_free(mem_ctx);
  72         Py_RETURN_NONE;
  73 }
  74
  75 static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
  76 {
  77         char *filename, *attribute, *tdbname;
  78         TALLOC_CTX *mem_ctx;
  79         DATA_BLOB blob;
  80         PyObject *ret;
  81         NTSTATUS status;
  82         struct tdb_wrap *eadb = NULL;
  83
  84         if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
  85                 return NULL;
  86
  87         mem_ctx = talloc_new(NULL);
  88         eadb = tdb_wrap_open(
  89                 mem_ctx, tdbname, 50000,
  90                 lpcfg_tdb_flags(py_default_loadparm_context(mem_ctx),
  91                                 TDB_DEFAULT),
  92                 O_RDWR|O_CREAT, 0600);
  93         if (eadb == NULL) {
  94                 PyErr_SetFromErrno(PyExc_IOError);
  95                 talloc_free(mem_ctx);
  96                 return NULL;
  97         }
  98         status = pull_xattr_blob_tdb_raw(eadb, mem_ctx, attribute, filename,
  99                                                                          -1, 100, &blob);
 100         if (!NT_STATUS_IS_OK(status)) {
 101                 PyErr_SetNTSTATUS(status);
 102                 talloc_free(mem_ctx);
 103                 return NULL;
 104         }
 105         ret = Py_BuildValue(PYARG_BYTES_LEN, blob.data, blob.length);
 106         talloc_free(mem_ctx);
 107         return ret;
 108 }
 109
 110 static PyMethodDef py_posix_eadb_methods[] = {
 111         { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
 112                 "wrap_getxattr(filename,attribute) -> blob\n"
 113                 "Retrieve given attribute on the given file." },
 114         { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
 115                 "wrap_setxattr(filename,attribute,value)\n"
 116                 "Set the given attribute to the given value on the given file." },
 117         { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
 118                 "Return true if xattr are supported on this system\n"},
 119         {0}
 120 };
 121
 122 static struct PyModuleDef moduledef = {
 123     PyModuleDef_HEAD_INIT,
 124     .m_name = "posix_eadb",
 125     .m_doc = "Python bindings for xattr manipulation.",
 126     .m_size = -1,
 127     .m_methods = py_posix_eadb_methods,
 128 };
 129
 130 MODULE_INIT_FUNC(posix_eadb)
 131 {
 132         PyObject *m;
 133
 134         m = PyModule_Create(&moduledef);
 135
 136         if (m == NULL)
 137                 return NULL;
 138
 139         return m;
 140 }