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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright (C) 2012 Giovanni Campagna <scampa.giovanni@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "gdm-dbus-util.h"
#include <string.h>
#include <glib/gstdio.h>
#include <gio/gunixsocketaddress.h>
/* a subset of org.freedesktop.DBus interface, to be used by internal servers */
static const char *dbus_introspection =
"<node name=\"/org/freedesktop/DBus\">"
" <interface name=\"org.freedesktop.DBus\">"
" <method name=\"AddMatch\">"
" <arg name=\"match_rule\" type=\"s\" direction=\"in\" />"
" </method>"
" </interface>"
"</node>";
static void
handle_bus_method (GDBusConnection *connection,
const char *sender,
const char *object_path,
const char *interface_name,
const char *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
g_dbus_method_invocation_return_value (invocation, NULL);
}
static gboolean
handle_connection (GDBusServer *server,
GDBusConnection *new_connection,
gpointer user_data)
{
GDBusInterfaceVTable bus_vtable = { handle_bus_method };
GDBusNodeInfo *bus_info;
bus_info = g_dbus_node_info_new_for_xml (dbus_introspection,
NULL);
g_debug ("GdmDBusServer: new connection %p", new_connection);
g_dbus_connection_register_object (new_connection,
"/org/freedesktop/DBus",
bus_info->interfaces[0],
&bus_vtable,
NULL, NULL, NULL);
g_dbus_node_info_unref (bus_info);
/* We're not handling the signal */
return FALSE;
}
GDBusServer *
gdm_dbus_setup_private_server (GDBusAuthObserver *observer,
GError **error)
{
char *guid;
const char *client_address;
GDBusServer *server;
guid = g_dbus_generate_guid ();
server = g_dbus_server_new_sync ("unix:tmpdir=/tmp",
G_DBUS_SERVER_FLAGS_NONE,
guid,
observer,
NULL,
error);
client_address = g_dbus_server_get_client_address (server);
if (g_str_has_prefix (client_address, "unix:path=")) {
client_address += strlen("unix:path=");
g_chmod (client_address, 0666);
}
g_signal_connect (server, "new-connection",
G_CALLBACK (handle_connection),
NULL);
g_free (guid);
return server;
}
gboolean
gdm_dbus_get_pid_for_name (const char *system_bus_name,
pid_t *out_pid,
GError **error)
{
GDBusConnection *bus;
GVariant *reply;
gboolean retval = FALSE;
unsigned int v;
bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, error);
if (bus == NULL) {
return FALSE;
}
reply = g_dbus_connection_call_sync (bus,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetConnectionUnixProcessID",
g_variant_new ("(s)", system_bus_name),
G_VARIANT_TYPE ("(u)"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, error);
if (reply == NULL) {
goto out;
}
g_variant_get (reply, "(u)", &v);
*out_pid = v;
g_variant_unref (reply);
retval = TRUE;
out:
g_object_unref (bus);
return retval;
}
gboolean
gdm_dbus_get_uid_for_name (const char *system_bus_name,
uid_t *out_uid,
GError **error)
{
GDBusConnection *bus;
GVariant *reply;
gboolean retval = FALSE;
unsigned int v;
bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, error);
if (bus == NULL) {
return FALSE;
}
reply = g_dbus_connection_call_sync (bus,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"GetConnectionUnixUser",
g_variant_new ("(s)", system_bus_name),
G_VARIANT_TYPE ("(u)"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, error);
if (reply == NULL) {
goto out;
}
g_variant_get (reply, "(u)", &v);
*out_uid = v;
g_variant_unref (reply);
retval = TRUE;
out:
g_object_unref (bus);
return retval;
}
void
gdm_dbus_error_ensure (GQuark domain)
{
/* The primary purpose of this function is to make sure the error quark
* is registered internally with gdbus before any bus traffic occurs,
* so we get remote errors mapped correctly to their local counterparts.
* This error quark registration happens implicitly the first time the
* quark is used.
* Note that g_debug is never optimized away, only the output is suppressed.
*/
g_debug ("GdmDBusUtils: Registered DBus error domain '%s'",
g_quark_to_string (domain));
}
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