source4/ntvfs/posix/python/pyxattr_native.c

   1 /*
   2    Unix SMB/CIFS implementation. Xattr manipulation bindings.
   3    Copyright (C) Matthieu Patou <mat@matws.net> 2009
   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 "librpc/ndr/libndr.h"
  24 #include "system/filesys.h"
  25
  26 void initxattr_native(void);
  27
  28 static PyObject *py_is_xattr_supported(PyObject *self)
  29 {
  30 #if !defined(HAVE_XATTR_SUPPORT)
  31         return Py_False;
  32 #else
  33         return Py_True;
  34 #endif
  35 }
  36
  37 static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
  38 {
  39         char *filename, *attribute;
  40         int ret = 0;
  41         int blobsize;
  42         DATA_BLOB blob;
  43
  44         if (!PyArg_ParseTuple(args, "sss#", &filename, &attribute, &blob.data,
  45         &blobsize))
  46                 return NULL;
  47
  48         blob.length = blobsize;
  49         ret = setxattr(filename, attribute, blob.data, blob.length, 0);
  50         if( ret < 0 ) {
  51                 if (errno == ENOTSUP) {
  52                         PyErr_SetFromErrno(PyExc_IOError);
  53                 } else {
  54                         PyErr_SetFromErrno(PyExc_TypeError);
  55                 }
  56                 return NULL;
  57         }
  58         Py_RETURN_NONE;
  59 }
  60
  61 static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
  62 {
  63         char *filename, *attribute;
  64         int len;
  65         TALLOC_CTX *mem_ctx;
  66         char *buf;
  67         PyObject *ret;
  68         if (!PyArg_ParseTuple(args, "ss", &filename, &attribute))
  69                 return NULL;
  70         mem_ctx = talloc_new(NULL);
  71         len = getxattr(filename,attribute,NULL,0);
  72         if( len < 0 ) {
  73                 if (errno == ENOTSUP) {
  74                         PyErr_SetFromErrno(PyExc_IOError);
  75                 } else {
  76                         PyErr_SetFromErrno(PyExc_TypeError);
  77                 }
  78                 talloc_free(mem_ctx);
  79                 return NULL;
  80         }
  81         /* check length ... */
  82         buf = talloc_zero_array(mem_ctx, char, len);
  83         len = getxattr(filename, attribute, buf, len);
  84         if( len < 0 ) {
  85                 if (errno == ENOTSUP) {
  86                         PyErr_SetFromErrno(PyExc_IOError);
  87                 } else {
  88                         PyErr_SetFromErrno(PyExc_TypeError);
  89                 }
  90                 talloc_free(mem_ctx);
  91                 return NULL;
  92         }
  93         ret = PyString_FromStringAndSize(buf, len);
  94         talloc_free(mem_ctx);
  95         return ret;
  96 }
  97
  98 static PyMethodDef py_xattr_methods[] = {
  99         { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
 100                 "wrap_getxattr(filename,attribute) -> blob\n"
 101                 "Retreive given attribute on the given file." },
 102         { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
 103                 "wrap_setxattr(filename,attribute,value)\n"
 104                 "Set the given attribute to the given value on the given file." },
 105         { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
 106                 "Return true if xattr are supported on this system\n"},
 107         { NULL }
 108 };
 109
 110 void initxattr_native(void)
 111 {
 112         PyObject *m;
 113
 114         m = Py_InitModule3("xattr_native", py_xattr_methods,
 115                            "Python bindings for xattr manipulation.");
 116
 117         if (m == NULL)
 118                 return;
 119 }
 120