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/*
* Copyright © 2010 Codethink Limited
* Copyright © 2012 Canonical Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "dconf-engine-source-private.h"
#include "../shm/dconf-shm.h"
#include "dconf-engine.h"
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
static void
dconf_engine_source_user_nfs_init (DConfEngineSource *source)
{
GError *error = NULL;
GVariant *reply;
source->bus_type = G_BUS_TYPE_SESSION;
source->bus_name = g_strdup ("ca.desrt.dconf");
source->object_path = g_strdup_printf ("/ca/desrt/dconf/Writer/%s", source->name);
source->writable = TRUE;
/* We need to get the dconf-service to come online and notice that
* we're on an NFS home directory. In that case it will copy the
* given database into the XDG_RUNTIME_DIR which is where we will
* access it.
*
* This prevents us from doing mmap() on a file on NFS (which often
* results in us seeing SIGBUS).
*/
reply = dconf_engine_dbus_call_sync_func (G_BUS_TYPE_SESSION, source->bus_name, source->object_path,
"ca.desrt.dconf.Writer", "Init", NULL, G_VARIANT_TYPE_UNIT, &error);
if (reply)
g_variant_unref (reply);
else
{
g_warning ("Trying to start the dconf service failed: %s. Expect problems.", error->message);
g_error_free (error);
}
}
static gboolean
dconf_engine_source_user_nfs_needs_reopen (DConfEngineSource *source)
{
return !source->values || !gvdb_table_is_valid (source->values);
}
static GvdbTable *
dconf_engine_source_user_nfs_reopen (DConfEngineSource *source)
{
GvdbTable *table;
gchar *filename;
filename = g_build_filename (dconf_shm_get_shmdir (), source->name, NULL);
table = gvdb_table_new (filename, FALSE, NULL);
g_free (filename);
return table;
}
static void
dconf_engine_source_user_nfs_finalize (DConfEngineSource *source)
{
}
G_GNUC_INTERNAL
const DConfEngineSourceVTable dconf_engine_source_user_nfs_vtable = {
.instance_size = sizeof (DConfEngineSource),
.init = dconf_engine_source_user_nfs_init,
.finalize = dconf_engine_source_user_nfs_finalize,
.needs_reopen = dconf_engine_source_user_nfs_needs_reopen,
.reopen = dconf_engine_source_user_nfs_reopen
};
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