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 "ntvfs/posix/posix_eadb.h"
  28 #include "libcli/util/pyerrors.h"
  29 #include "param/pyparam.h"
  30 #include "lib/dbwrap/dbwrap.h"
  31 #include "lib/dbwrap/dbwrap_open.h"
  32 #include "lib/dbwrap/dbwrap_tdb.h"
  33 #include "source3/lib/xattr_tdb.h"
  34
  35 void initxattr_tdb(void);
  36
  37 static PyObject *py_is_xattr_supported(PyObject *self)
  38 {
  39         return Py_True;
  40 }
  41
  42 static PyObject *py_wrap_setxattr(PyObject *self, PyObject *args)
  43 {
  44         char *filename, *attribute, *tdbname;
  45         DATA_BLOB blob;
  46         int blobsize;
  47         int ret;
  48         TALLOC_CTX *mem_ctx;
  49         struct db_context *eadb = NULL;
  50         struct file_id id;
  51         struct stat sbuf;
  52
  53         if (!PyArg_ParseTuple(args, "ssss#", &tdbname, &filename, &attribute,
  54                                                   &blob.data, &blobsize))
  55                 return NULL;
  56
  57         blob.length = blobsize;
  58         mem_ctx = talloc_new(NULL);
  59         eadb = db_open_tdb(mem_ctx, py_default_loadparm_context(mem_ctx), tdbname, 50000,
  60                            TDB_DEFAULT, O_RDWR|O_CREAT, 0600, DBWRAP_LOCK_ORDER_2);
  61
  62         if (eadb == NULL) {
  63                 PyErr_SetFromErrno(PyExc_IOError);
  64                 talloc_free(mem_ctx);
  65                 return NULL;
  66         }
  67
  68         ret = stat(filename, &sbuf);
  69         if (ret < 0) {
  70                 PyErr_SetFromErrno(PyExc_IOError);
  71                 talloc_free(mem_ctx);
  72                 return NULL;
  73         }
  74
  75         ZERO_STRUCT(id);
  76         id.devid = sbuf.st_dev;
  77         id.inode = sbuf.st_ino;
  78
  79         ret = xattr_tdb_setattr(eadb, &id, attribute, blob.data, blob.length, 0);
  80         if (ret < 0) {
  81                 PyErr_SetFromErrno(PyExc_TypeError);
  82                 talloc_free(mem_ctx);
  83                 return NULL;
  84         }
  85         talloc_free(mem_ctx);
  86         Py_RETURN_NONE;
  87 }
  88
  89 static PyObject *py_wrap_getxattr(PyObject *self, PyObject *args)
  90 {
  91         char *filename, *attribute, *tdbname;
  92         TALLOC_CTX *mem_ctx;
  93         DATA_BLOB blob;
  94         PyObject *ret_obj;
  95         int ret;
  96         ssize_t xattr_size;
  97         struct db_context *eadb = NULL;
  98         struct file_id id;
  99         struct stat sbuf;
 100
 101         if (!PyArg_ParseTuple(args, "sss", &tdbname, &filename, &attribute))
 102                 return NULL;
 103
 104         mem_ctx = talloc_new(NULL);
 105
 106         eadb = db_open_tdb(mem_ctx, py_default_loadparm_context(mem_ctx), tdbname, 50000,
 107                            TDB_DEFAULT, O_RDWR|O_CREAT, 0600, DBWRAP_LOCK_ORDER_2);
 108
 109         if (eadb == NULL) {
 110                 PyErr_SetFromErrno(PyExc_IOError);
 111                 talloc_free(mem_ctx);
 112                 return NULL;
 113         }
 114
 115         ret = stat(filename, &sbuf);
 116         if (ret < 0) {
 117                 PyErr_SetFromErrno(PyExc_IOError);
 118                 talloc_free(mem_ctx);
 119                 return NULL;
 120         }
 121
 122         ZERO_STRUCT(id);
 123         id.devid = sbuf.st_dev;
 124         id.inode = sbuf.st_ino;
 125
 126         xattr_size = xattr_tdb_getattr(eadb, mem_ctx, &id, attribute, &blob);
 127         if (xattr_size < 0) {
 128                 PyErr_SetFromErrno(PyExc_TypeError);
 129                 talloc_free(mem_ctx);
 130                 return NULL;
 131         }
 132         ret_obj = PyString_FromStringAndSize((char *)blob.data, xattr_size);
 133         talloc_free(mem_ctx);
 134         return ret_obj;
 135 }
 136
 137 static PyMethodDef py_xattr_methods[] = {
 138         { "wrap_getxattr", (PyCFunction)py_wrap_getxattr, METH_VARARGS,
 139                 "wrap_getxattr(filename,attribute) -> blob\n"
 140                 "Retreive given attribute on the given file." },
 141         { "wrap_setxattr", (PyCFunction)py_wrap_setxattr, METH_VARARGS,
 142                 "wrap_setxattr(filename,attribute,value)\n"
 143                 "Set the given attribute to the given value on the given file." },
 144         { "is_xattr_supported", (PyCFunction)py_is_xattr_supported, METH_NOARGS,
 145                 "Return true if xattr are supported on this system\n"},
 146         { NULL }
 147 };
 148
 149 void initxattr_tdb(void)
 150 {
 151         PyObject *m;
 152
 153         m = Py_InitModule3("xattr_tdb", py_xattr_methods,
 154                            "Python bindings for xattr manipulation.");
 155         if (m == NULL)
 156                 return;
 157 }
 158