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 <Python.h>
  22 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "tdb_compat.h"
  25 #include "lib/tdb_wrap/tdb_wrap.h"
  26 #include "librpc/ndr/libndr.h"
  27 #include "ntvfs/posix/posix_eadb.h"
  28 #include "libcli/util/pyerrors.h"
  29 #include "param/pyparam.h"
  30
  31 void initxattr_tdb(void);
  32
  33 static PyObject *py_is_xattr_supported(PyObject *self)
  34 {
  35         return Py_True;
  36 }
  37
  38 static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
  39 {
  40         char *filename, *attribute, *tdbname;
  41         DATA_BLOB blob;
  42         int blobsize;
  43         NTSTATUS status;
  44         TALLOC_CTX *mem_ctx;
  45         struct tdb_wrap *eadb;
  46
  47         if (!PyArg_ParseTuple(args, "ssss#", &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(mem_ctx, tdbname, 50000,
  54                              TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
  55                              py_default_loadparm_context(mem_ctx));
  56
  57         if (eadb == NULL) {
  58                 PyErr_SetFromErrno(PyExc_IOError);
  59                 talloc_free(mem_ctx);
  60                 return NULL;
  61         }
  62         status = push_xattr_blob_tdb_raw(eadb, attribute, filename, -1,
  63                                          &blob);
  64         if (!NT_STATUS_IS_OK(status)) {
  65                 PyErr_SetNTSTATUS(status);
  66                 talloc_free(mem_ctx);
  67                 return NULL;
  68         }
  69         talloc_free(mem_ctx);
  70         Py_RETURN_NONE;
  71 }
  72
  73 static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
  74 {
  75         char *filename, *attribute, *tdbname;
  76         TALLOC_CTX *mem_ctx;
  77         DATA_BLOB blob;
  78         PyObject *ret;
  79         NTSTATUS status;
  80         struct tdb_wrap *eadb = NULL;
  81
  82         if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
  83                 return NULL;
  84
  85         mem_ctx = talloc_new(NULL);
  86         eadb = tdb_wrap_open(mem_ctx, tdbname, 50000,
  87                              TDB_DEFAULT, O_RDWR|O_CREAT, 0600, py_default_loadparm_context(mem_ctx));
  88         if (eadb == NULL) {
  89                 PyErr_SetFromErrno(PyExc_IOError);
  90                 talloc_free(mem_ctx);
  91                 return NULL;
  92         }
  93         status = pull_xattr_blob_tdb_raw(eadb, mem_ctx, attribute, filename,
  94                                                                          -1, 100, &blob);
  95         if (!NT_STATUS_IS_OK(status)) {
  96                 PyErr_SetNTSTATUS(status);
  97                 talloc_free(mem_ctx);
  98                 return NULL;
  99         }
 100         ret = PyString_FromStringAndSize((char *)blob.data, blob.length);
 101         talloc_free(mem_ctx);
 102         return ret;
 103 }
 104
 105 static PyMethodDef py_posix_eadb_methods[] = {
 106         { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
 107                 "wrap_getxattr(filename,attribute) -> blob\n"
 108                 "Retreive given attribute on the given file." },
 109         { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
 110                 "wrap_setxattr(filename,attribute,value)\n"
 111                 "Set the given attribute to the given value on the given file." },
 112         { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
 113                 "Return true if xattr are supported on this system\n"},
 114         { NULL }
 115 };
 116
 117 void initposix_eadb(void)
 118 {
 119         PyObject *m;
 120
 121         m = Py_InitModule3("posix_eadb", py_posix_eadb_methods,
 122                            "Python bindings for xattr manipulation.");
 123         if (m == NULL)
 124                 return;
 125 }