src/x-server.c

   1 /*
   2  * Copyright (C) 2010-2011 Robert Ancell.
   3  * Author: Robert Ancell <robert.ancell@canonical.com>
   4  *
   5  * This program is free software: you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option) any later
   8  * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
   9  * license.
  10  */
  11
  12 #include <config.h>
  13 #include <string.h>
  14 #include <xcb/xcb.h>
  15
  16 #include "x-server.h"
  17 #include "configuration.h"
  18
  19 struct XServerPrivate
  20 {
  21     /* Host running the server */
  22     gchar *hostname;
  23
  24     /* Display number */
  25     guint number;
  26
  27     /* Cached server address */
  28     gchar *address;
  29
  30     /* Authority */
  31     XAuthority *authority;
  32
  33     /* Connection to this X server */
  34     xcb_connection_t *connection;
  35 };
  36
  37 G_DEFINE_TYPE (XServer, x_server, DISPLAY_SERVER_TYPE);
  38
  39 void
  40 x_server_set_hostname (XServer *server, const gchar *hostname)
  41 {
  42     g_return_if_fail (server != NULL);
  43     g_free (server->priv->hostname);
  44     server->priv->hostname = g_strdup (hostname);
  45     g_free (server->priv->address);
  46     server->priv->address = NULL;
  47 }
  48
  49 gchar *
  50 x_server_get_hostname (XServer *server)
  51 {
  52     g_return_val_if_fail (server != NULL, NULL);
  53     return server->priv->hostname;
  54 }
  55
  56 void
  57 x_server_set_display_number (XServer *server, guint number)
  58 {
  59     g_return_if_fail (server != NULL);
  60     server->priv->number = number;
  61     g_free (server->priv->address);
  62     server->priv->address = NULL;
  63 }
  64
  65 guint
  66 x_server_get_display_number (XServer *server)
  67 {
  68     g_return_val_if_fail (server != NULL, 0);
  69     return server->priv->number;
  70 }
  71
  72 const gchar *
  73 x_server_get_address (XServer *server)
  74 {
  75     g_return_val_if_fail (server != NULL, NULL);
  76
  77     if (!server->priv->address)
  78     {
  79         if (server->priv->hostname)
  80             server->priv->address = g_strdup_printf("%s:%d", server->priv->hostname, server->priv->number);
  81         else
  82             server->priv->address = g_strdup_printf(":%d", server->priv->number);
  83     }
  84
  85     return server->priv->address;
  86 }
  87
  88 void
  89 x_server_set_authority (XServer *server, XAuthority *authority)
  90 {
  91     g_return_if_fail (server != NULL);
  92
  93     g_clear_object (&server->priv->authority);
  94     if (authority)
  95         server->priv->authority = g_object_ref (authority);
  96 }
  97
  98 XAuthority *
  99 x_server_get_authority (XServer *server)
 100 {
 101     g_return_val_if_fail (server != NULL, NULL);
 102     return server->priv->authority;
 103 }
 104
 105 static const gchar *
 106 x_server_get_session_type (DisplayServer *server)
 107 {
 108     return "x";
 109 }
 110
 111 static gboolean
 112 x_server_get_can_share (DisplayServer *server)
 113 {
 114     return TRUE;
 115 }
 116
 117 static gboolean
 118 x_server_start (DisplayServer *display_server)
 119 {
 120     XServer *server = X_SERVER (display_server);
 121     xcb_auth_info_t *auth = NULL, a;
 122
 123     if (server->priv->authority)
 124     {
 125         a.namelen = strlen (x_authority_get_authorization_name (server->priv->authority));
 126         a.name = (char *) x_authority_get_authorization_name (server->priv->authority);
 127         a.datalen = x_authority_get_authorization_data_length (server->priv->authority);
 128         a.data = (char *) x_authority_get_authorization_data (server->priv->authority);
 129         auth = &a;
 130     }
 131
 132     /* Open connection */
 133     l_debug (server, "Connecting to XServer %s", x_server_get_address (server));
 134     server->priv->connection = xcb_connect_to_display_with_auth_info (x_server_get_address (server), auth, NULL);
 135     if (xcb_connection_has_error (server->priv->connection))
 136     {
 137         l_debug (server, "Error connecting to XServer %s", x_server_get_address (server));
 138         return FALSE;
 139     }
 140
 141     return DISPLAY_SERVER_CLASS (x_server_parent_class)->start (display_server);
 142 }
 143
 144 static void
 145 x_server_connect_session (DisplayServer *display_server, Session *session)
 146 {
 147     gint vt;
 148
 149     session_set_env (session, "XDG_SESSION_TYPE", "x11");
 150
 151     display_server = session_get_display_server (session);
 152
 153     vt = display_server_get_vt (display_server);
 154     if (vt > 0)
 155     {
 156         gchar *t;
 157
 158         t = g_strdup_printf ("/dev/tty%d", vt);
 159         session_set_tty (session, t);
 160         g_free (t);
 161
 162         t = g_strdup_printf ("%d", vt);
 163         session_set_env (session, "XDG_VTNR", t);
 164         g_free (t);
 165     }
 166     else
 167         l_debug (session, "Not setting XDG_VTNR");
 168
 169     session_set_env (session, "DISPLAY", x_server_get_address (X_SERVER (display_server)));
 170     session_set_xdisplay (session, x_server_get_address (X_SERVER (display_server)));
 171     session_set_remote_host_name (session, x_server_get_hostname (X_SERVER (display_server)));
 172     session_set_x_authority (session,
 173                              x_server_get_authority (X_SERVER (display_server)),
 174                              config_get_boolean (config_get_instance (), "LightDM", "user-authority-in-system-dir"));
 175 }
 176
 177 static void
 178 x_server_disconnect_session (DisplayServer *display_server, Session *session)
 179 {
 180     gint vt;
 181
 182     session_unset_env (session, "XDG_SESSION_TYPE");
 183     vt = display_server_get_vt (display_server);
 184     if (vt > 0)
 185     {
 186         session_set_tty (session, NULL);
 187         session_unset_env (session, "XDG_VTNR");
 188     }
 189     session_unset_env (session, "DISPLAY");
 190     session_set_xdisplay (session, NULL);
 191     session_set_remote_host_name (session, NULL);
 192     session_set_x_authority (session, NULL, FALSE);
 193 }
 194
 195 void
 196 x_server_init (XServer *server)
 197 {
 198     server->priv = G_TYPE_INSTANCE_GET_PRIVATE (server, X_SERVER_TYPE, XServerPrivate);
 199 }
 200
 201 static void
 202 x_server_finalize (GObject *object)
 203 {
 204     XServer *self = X_SERVER (object);
 205
 206     g_free (self->priv->hostname);
 207     g_free (self->priv->address);
 208     g_clear_object (&self->priv->authority);
 209     if (self->priv->connection)
 210         xcb_disconnect (self->priv->connection);
 211
 212     G_OBJECT_CLASS (x_server_parent_class)->finalize (object);
 213 }
 214
 215 static void
 216 x_server_class_init (XServerClass *klass)
 217 {
 218     GObjectClass *object_class = G_OBJECT_CLASS (klass);
 219     DisplayServerClass *display_server_class = DISPLAY_SERVER_CLASS (klass);
 220
 221     display_server_class->get_session_type = x_server_get_session_type;
 222     display_server_class->get_can_share = x_server_get_can_share;
 223     display_server_class->start = x_server_start;
 224     display_server_class->connect_session = x_server_connect_session;
 225     display_server_class->disconnect_session = x_server_disconnect_session;
 226     object_class->finalize = x_server_finalize;
 227
 228     g_type_class_add_private (klass, sizeof (XServerPrivate));
 229 }