source4/ntvfs/posix/python/pyxattr_tdb.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 "lib/util/wrap_xattr.h"
  28 #include "ntvfs/posix/posix_eadb.h"
  29 #include "libcli/util/pyerrors.h"
  30 #include "param/pyparam.h"
  31
  32 void initxattr_tdb(void);
  33
  34 static PyObject *py_is_xattr_supported(PyObject *self)
  35 {
  36         return Py_True;
  37 }
  38
  39 static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
  40 {
  41         char *filename, *attribute, *tdbname;
  42         DATA_BLOB blob;
  43         int blobsize;
  44         NTSTATUS status;
  45         TALLOC_CTX *mem_ctx;
  46         struct tdb_wrap *eadb;
  47
  48         if (!PyArg_ParseTuple(args, "ssss#", &tdbname, &filename, &attribute,
  49                                                   &blob.data, &blobsize))
  50                 return NULL;
  51
  52         blob.length = blobsize;
  53         mem_ctx = talloc_new(NULL);
  54         eadb = tdb_wrap_open(mem_ctx, tdbname, 50000,
  55                              TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
  56                              py_default_loadparm_context(mem_ctx));
  57
  58         if (eadb == NULL) {
  59                 PyErr_SetFromErrno(PyExc_IOError);
  60                 talloc_free(mem_ctx);
  61                 return NULL;
  62         }
  63         status = push_xattr_blob_tdb_raw(eadb, attribute, filename, -1,
  64                                          &blob);
  65         if (!NT_STATUS_IS_OK(status)) {
  66                 PyErr_SetNTSTATUS(status);
  67                 talloc_free(mem_ctx);
  68                 return NULL;
  69         }
  70         talloc_free(mem_ctx);
  71         Py_RETURN_NONE;
  72 }
  73
  74 static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
  75 {
  76         char *filename, *attribute, *tdbname;
  77         TALLOC_CTX *mem_ctx;
  78         DATA_BLOB blob;
  79         PyObject *ret;
  80         NTSTATUS status;
  81         struct tdb_wrap *eadb = NULL;
  82
  83         if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
  84                 return NULL;
  85
  86         mem_ctx = talloc_new(NULL);
  87         eadb = tdb_wrap_open(mem_ctx, tdbname, 50000,
  88                              TDB_DEFAULT, O_RDWR|O_CREAT, 0600, py_default_loadparm_context(mem_ctx));
  89         if (eadb == NULL) {
  90                 PyErr_SetFromErrno(PyExc_IOError);
  91                 talloc_free(mem_ctx);
  92                 return NULL;
  93         }
  94         status = pull_xattr_blob_tdb_raw(eadb, mem_ctx, attribute, filename,
  95                                                                          -1, 100, &blob);
  96         if (!NT_STATUS_IS_OK(status)) {
  97                 PyErr_SetNTSTATUS(status);
  98                 talloc_free(mem_ctx);
  99                 return NULL;
 100         }
 101         ret = PyString_FromStringAndSize((char *)blob.data, blob.length);
 102         talloc_free(mem_ctx);
 103         return ret;
 104 }
 105
 106 static PyMethodDef py_xattr_methods[] = {
 107         { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
 108                 "wrap_getxattr(filename,attribute) -> blob\n"
 109                 "Retreive given attribute on the given file." },
 110         { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
 111                 "wrap_setxattr(filename,attribute,value)\n"
 112                 "Set the given attribute to the given value on the given file." },
 113         { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
 114                 "Return true if xattr are supported on this system\n"},
 115         { NULL }
 116 };
 117
 118 void initxattr_tdb(void)
 119 {
 120         PyObject *m;
 121
 122         m = Py_InitModule3("xattr_tdb", py_xattr_methods,
 123                            "Python bindings for xattr manipulation.");
 124         if (m == NULL)
 125                 return;
 126 }
 127