src/interfaces/hostnamed/hostnamed.c

   1 #include <gio/gio.h>
   2
   3 /* testing, for now */
   4 static GDBusNodeInfo *spect_data = NULL;
   5 static const gchar spect_xml[] =
   6                 "<node>"
   7                 " <interface name='org.freedesktop.DBus.Peer'>"
   8                 "  <method name='Ping'/>"
   9                 "  <method name='GetMachineId'>"
  10                 "   <arg type='s' name='machine_uuid' direction='out'/>"
  11                 "  </method>"
  12                 " </interface>"
  13                 " <interface name='org.freedesktop.DBus.Introspectable'>"
  14                 "  <method name='Introspect'>"
  15                 "   <arg name='data' type='s' direction='out'/>"
  16                 "  </method>"
  17                 " </interface>"
  18                 " <interface name='org.freedesktop.DBus.Properties'>"
  19                 "  <method name='Get'>"
  20                 "   <arg name='interface' direction='in' type='s'/>"
  21                 "   <arg name='property' direction='in' type='s'/>"
  22                 "   <arg name='value' direction='out' type='v'/>"
  23                 "  </method>"
  24                 "  <method name='GetAll'>"
  25                 "   <arg name='interface' direction='in' type='s'/>"
  26                 "   <arg name='properties' direction='out' type='a{sv}'/>"
  27                 "  </method>"
  28                 "  <method name='Set'>"
  29                 "   <arg name='interface' direction='in' type='s'/>"
  30                 "   <arg name='property' direction='in' type='s'/>"
  31                 "   <arg name='value' direction='in' type='v'/>"
  32                 "  </method>"
  33                 "  <signal name='PropertiesChanged'>"
  34                 "   <arg type='s' name='interface'/>"
  35                 "   <arg type='a{sv}' name='changed_properties'/>"
  36                 "   <arg type='as' name='invalidated_properties'/>"
  37                 "  </signal>"
  38                 " </interface>"
  39                 " <interface name='org.freedesktop.hostname1'>"
  40                 "  <property name='Hostname' type='s' access='read'>"
  41                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='false'/>"
  42                 "  </property>"
  43                 "  <property name='StaticHostname' type='s' access='read'>"
  44                 "  </property>"
  45                 "  <property name='PrettyHostname' type='s' access='read'>"
  46                 "  </property>"
  47                 "  <property name='IconName' type='s' access='read'>"
  48                 "  </property>"
  49                 "  <property name='Chassis' type='s' access='read'>"
  50                 "  </property>"
  51                 "  <property name='KernelName' type='s' access='read'>"
  52                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='const'/>"
  53                 "  </property>"
  54                 "  <property name='KernelRelease' type='s' access='read'>"
  55                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='const'/>"
  56                 "  </property>"
  57                 "  <property name='KernelVersion' type='s' access='read'>"
  58                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='const'/>"
  59                 "  </property>"
  60                 "  <property name='OperatingSystemPrettyName' type='s' access='read'>"
  61                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='const'/>"
  62                 "  </property>"
  63                 "  <property name='OperatingSystemCPEName' type='s' access='read'>"
  64                 "   <annotation name='org.freedesktop.DBus.Property.EmitsChangedSignal' value='const'/>"
  65                 "  </property>"
  66                 "  <method name='SetHostname'>"
  67                 "   <arg type='s' direction='in'/>"
  68                 "   <arg type='b' direction='in'/>"
  69                 "  </method>"
  70                 "  <method name='SetStaticHostname'>"
  71                 "   <arg type='s' direction='in'/>"
  72                 "   <arg type='b' direction='in'/>"
  73                 "  </method>"
  74                 "  <method name='SetPrettyHostname'>"
  75                 "   <arg type='s' direction='in'/>"
  76                 "   <arg type='b' direction='in'/>"
  77                 "  </method>"
  78                 "  <method name='SetIconName'>"
  79                 "   <arg type='s' direction='in'/>"
  80                 "   <arg type='b' direction='in'/>"
  81                 "  </method>"
  82                 "  <method name='SetChassis'>"
  83                 "   <arg type='s' direction='in'/>"
  84                 "   <arg type='b' direction='in'/>"
  85                 "  </method>"
  86                 " </interface>"
  87                 "</node>";
  88
  89 static const GDBusInterfaceVTable interface_vtable =
  90 {
  91   handle_method_call,
  92   handle_get_property,
  93   handle_set_property
  94 };
  95
  96 static void handle_method_call(GDBusConnection *conn,
  97                                 const gchar *sender,
  98                                 const gchar *obj_path,
  99                                 const gchar *interf_name,
 100                                 const gchar *method_name,
 101                                 GVariant *params,
 102                                 GDBusMethodInvocation *invc,
 103                                 gpointer usrdat) {
 104
 105                 g_printf("%s wants to call %s, at %s with interface %s\n", sender, method_name, obj_path, interf_name);
 106
 107                 g_dbus_method_invocation_return_value(invc, &spect_xml);
 108
 109 }
 110
 111
 112 static GVariant * handle_get_property(GDBusConnection *conn,
 113                                 const gchar *sender,
 114                                 const gchar *obj_path,
 115                                 const gchar *interf_name,
 116                                 const gchar *prop_name,
 117                                 GError **err,
 118                                 gpointer usr_data) {
 119
 120                 GVariant *ret;
 121                 ret = g_variant_new_string("");
 122                 g_snprintf(ret, 100, "%s touched property %s at %s", sender, prop_name, obj_path);
 123
 124                 return ret;
 125 }
 126
 127 static gboolean handle_set_property(GDBusConnection *conn,
 128                                 const gchar *sender,
 129                                 const gchar *obj_path,
 130                                 const gchar *interf_name,
 131                                 const gchar *prop_name,
 132                                 GVariant *val,
 133                                 GError **err,
 134                                 gpointer usr_data) {
 135                 g_dbus_connection_emit_signal(conn,
 136                                                 NULL,
 137                                                 obj_path,
 138                                                 "org.freedesktop.DBus.Properties",
 139                                                 "PropertiesChanged",
 140                                                 NULL, /* incorrect */
 141                                                 NULL);
 142
 143                 return TRUE;
 144 }
 145
 146 /* end method/property functions, begin bus name handlers
 147  * TODO: these should be intertwined as to handle edge cases
 148  * for when the system cannot immediately grab the name, as
 149  * well as cases where the system unintendedly loses the name
 150  */
 151
 152
 153 static void on_bus_acquired(GDBusConnection *conn, const gchar *name, gpointer user_data) {
 154         g_print("got bus, name: %s\n", name);
 155
 156         guint reg_id;
 157
 158         reg_id = g_dbus_connection_register_object (conn,
 159                                                                                                 "/org/freedesktop/hostname1",
 160                                                                                                 spect_data->interfaces[0],
 161                                                                                                 &interface_vtable,
 162                                                                                                 NULL,
 163                                                                                                 NULL,
 164                                                                                                 NULL );
 165         g_assert(reg_id > 0);
 166 }
 167
 168 static void on_name_acquired(GDBusConnection *conn, const gchar *name, gpointer user_data) {
 169         g_print("got name %s\n", name);
 170 }
 171
 172 static void on_name_lost(GDBusConnection *conn, const gchar *name, gpointer user_data) {
 173         g_print("lost name %s, exiting...\n", name);
 174         exit(1);
 175 }
 176
 177 /* safe call to try and start hostnamed */
 178 GError hostnamed_init() {
 179
 180         guint bus_descriptor;
 181         GError *err = NULL;
 182         GMainLoop *loop;
 183
 184         /* TODO: there is a correct way to generate introspection XML, switch to that */
 185         spect_data = g_dbus_node_info_new_for_xml(spect_xml, NULL);
 186
 187         bus_descriptor = g_bus_own_name(G_BUS_TYPE_SESSION,
 188                                         (gchar *)"org.freedesktop.hostname1",
 189                                                     G_BUS_NAME_OWNER_FLAGS_NONE,
 190                                                     on_bus_acquired,
 191                                                     on_name_acquired,
 192                                                     on_name_lost,
 193                                                     NULL,
 194                                                     NULL);
 195
 196         loop = g_main_loop_new(NULL, FALSE);
 197         g_main_loop_run(loop);
 198
 199         /* i am not sure what the system state is once g_main_loop exits */
 200
 201         g_bus_unown_name(bus_descriptor);
 202         g_dbus_node_info_unref(spect_data);
 203 }
 204