diff options
Diffstat (limited to 'daemon/gdm-dbus-util.c')
| -rw-r--r-- | daemon/gdm-dbus-util.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/daemon/gdm-dbus-util.c b/daemon/gdm-dbus-util.c new file mode 100644 index 0000000..844d60a --- /dev/null +++ b/daemon/gdm-dbus-util.c @@ -0,0 +1,199 @@ +/* -*- 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)); +} |