]> rtime.felk.cvut.cz Git - sojka/lightdm.git/blobdiff - src/seat-xlocal.c
Only run a single USC instance on xlocal seats (it no longer supports multiple instances)
[sojka/lightdm.git] / src / seat-xlocal.c
index fea6f8a30462e96837da9075a5c1d027ae2bb1ec..7d1b1ddb3e29ce07b88e4ef8fe3cc73a7fd1187c 100644 (file)
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2010-2011 Robert Ancell.
  * Author: Robert Ancell <robert.ancell@canonical.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 3 of the License, or (at your option) any later
 #include "seat-xlocal.h"
 #include "configuration.h"
 #include "x-server-local.h"
-#include "mir-server.h"
+#include "unity-system-compositor.h"
+#include "wayland-session.h"
 #include "plymouth.h"
 #include "vt.h"
 
+struct SeatXLocalPrivate
+{
+    /* System compositor being used for Mir sessions */
+    UnitySystemCompositor *compositor;
+
+    /* Session currently active on compositor */
+    Session *active_compositor_session;
+
+    /* X server being used for XDMCP */
+    XServerLocal *xdmcp_x_server;
+};
+
 G_DEFINE_TYPE (SeatXLocal, seat_xlocal, SEAT_TYPE);
 
-static gboolean
-seat_xlocal_get_start_local_sessions (Seat *seat)
-{
-    return !seat_get_string_property (seat, "xdmcp-manager");
-}
+static XServerLocal *create_x_server (SeatXLocal *seat);
 
 static void
 seat_xlocal_setup (Seat *seat)
 {
-    seat_set_can_switch (seat, TRUE);
+    seat_set_supports_multi_session (seat, TRUE);
     seat_set_share_display_server (seat, seat_get_boolean_property (seat, "xserver-share"));
     SEAT_CLASS (seat_xlocal_parent_class)->setup (seat);
 }
 
+static void
+check_stopped (SeatXLocal *seat)
+{
+    if (!seat->priv->xdmcp_x_server)
+        SEAT_CLASS (seat_xlocal_parent_class)->stop (SEAT (seat));
+}
+
+static void
+xdmcp_x_server_stopped_cb (DisplayServer *display_server, SeatXLocal *seat)
+{
+    l_debug (seat, "XDMCP X server stopped");
+
+    g_signal_handlers_disconnect_matched (seat->priv->xdmcp_x_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
+    g_clear_object (&seat->priv->xdmcp_x_server);
+
+    if (seat_get_is_stopping (SEAT (seat)))
+        check_stopped (seat);
+    else
+        seat_stop (SEAT (seat));
+}
+
+static void
+compositor_stopped_cb (UnitySystemCompositor *compositor, SeatXLocal *seat)
+{
+    l_debug (seat, "Compositor stopped");
+
+    g_clear_object (&seat->priv->compositor);
+
+    if (seat_get_is_stopping (SEAT (seat)))
+        check_stopped (seat);
+}  
+
 static gboolean
 seat_xlocal_start (Seat *seat)
 {
-   
+    const gchar *xdmcp_manager = NULL;
+
+    /* If running as an XDMCP client then just start an X server */
+    xdmcp_manager = seat_get_string_property (seat, "xdmcp-manager");
+    if (xdmcp_manager)
+    {
+        SeatXLocal *s = SEAT_XLOCAL (seat);
+        const gchar *key_name = NULL;
+        gint port = 0;
+
+        s->priv->xdmcp_x_server = create_x_server (s);
+        x_server_local_set_xdmcp_server (s->priv->xdmcp_x_server, xdmcp_manager);
+        port = seat_get_integer_property (seat, "xdmcp-port");
+        if (port > 0)
+            x_server_local_set_xdmcp_port (s->priv->xdmcp_x_server, port);
+        key_name = seat_get_string_property (seat, "xdmcp-key");
+        if (key_name)
+        {
+            gchar *path;
+            GKeyFile *keys;
+            gboolean result;
+            GError *error = NULL;
+
+            path = g_build_filename (config_get_directory (config_get_instance ()), "keys.conf", NULL);
+
+            keys = g_key_file_new ();
+            result = g_key_file_load_from_file (keys, path, G_KEY_FILE_NONE, &error);
+            if (error)
+                l_debug (seat, "Error getting key %s", error->message);
+            g_clear_error (&error);
+
+            if (result)
+            {
+                gchar *key = NULL;
+
+                if (g_key_file_has_key (keys, "keyring", key_name, NULL))
+                    key = g_key_file_get_string (keys, "keyring", key_name, NULL);
+                else
+                    l_debug (seat, "Key %s not defined", key_name);
+
+                if (key)
+                    x_server_local_set_xdmcp_key (s->priv->xdmcp_x_server, key);
+                g_free (key);
+            }
+
+            g_free (path);
+            g_key_file_free (keys);
+        }
+
+        g_signal_connect (s->priv->xdmcp_x_server, DISPLAY_SERVER_SIGNAL_STOPPED, G_CALLBACK (xdmcp_x_server_stopped_cb), seat);
+        return display_server_start (DISPLAY_SERVER (s->priv->xdmcp_x_server));
+    }
+
     return SEAT_CLASS (seat_xlocal_parent_class)->start (seat);
 }
 
 static void
-x_server_ready_cb (XServerLocal *x_server, Seat *seat)
+display_server_ready_cb (DisplayServer *display_server, Seat *seat)
 {
     /* Quit Plymouth */
     plymouth_quit (TRUE);
 }
 
 static void
-x_server_transition_plymouth_cb (XServerLocal *x_server, Seat *seat)
+display_server_transition_plymouth_cb (DisplayServer *display_server, Seat *seat)
 {
     /* Quit Plymouth if we didn't do the transition */
     if (plymouth_get_is_running ())
         plymouth_quit (FALSE);
 
-    g_signal_handlers_disconnect_matched (x_server, G_SIGNAL_MATCH_FUNC, 0, 0, NULL, x_server_transition_plymouth_cb, NULL);
+    g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_FUNC, 0, 0, NULL, display_server_transition_plymouth_cb, NULL);
 }
 
-static DisplayServer *
-create_x_server (Seat *seat)
+static gint
+get_vt (SeatXLocal *seat, DisplayServer *display_server)
 {
-    XServerLocal *x_server;
-    const gchar *command = NULL, *layout = NULL, *config_file = NULL, *xdmcp_manager = NULL, *key_name = NULL;
-    gboolean allow_tcp;
-    gint vt = -1, port = 0;
+    gint vt = -1;
+    const gchar *xdg_seat = seat_get_name (SEAT (seat));
 
-    if (vt > 0)
-        g_debug ("Starting local X display on VT %d", vt);
-    else
-        g_debug ("Starting local X display");
-  
-    x_server = x_server_local_new ();
-
-    /* If running inside an X server use Xephyr instead */
-    if (g_getenv ("DISPLAY"))
-        command = "Xephyr";
-    if (!command)
-        command = seat_get_string_property (seat, "xserver-command");
-    if (command)
-        x_server_local_set_command (x_server, command);
+    if (strcmp (xdg_seat, "seat0") != 0)
+        return vt;
 
     /* If Plymouth is running, stop it */
     if (plymouth_get_is_active () && plymouth_has_active_vt ())
@@ -88,121 +167,172 @@ create_x_server (Seat *seat)
         if (active_vt >= vt_get_min ())
         {
             vt = active_vt;
-            g_signal_connect (x_server, "ready", G_CALLBACK (x_server_ready_cb), seat);
-            g_signal_connect (x_server, "stopped", G_CALLBACK (x_server_transition_plymouth_cb), seat);
+            g_signal_connect (display_server, DISPLAY_SERVER_SIGNAL_READY, G_CALLBACK (display_server_ready_cb), seat);
+            g_signal_connect (display_server, DISPLAY_SERVER_SIGNAL_STOPPED, G_CALLBACK (display_server_transition_plymouth_cb), seat);
             plymouth_deactivate ();
         }
         else
-            g_debug ("Plymouth is running on VT %d, but this is less than the configured minimum of %d so not replacing it", active_vt, vt_get_min ());
+            l_debug (seat, "Plymouth is running on VT %d, but this is less than the configured minimum of %d so not replacing it", active_vt, vt_get_min ());
     }
     if (plymouth_get_is_active ())
         plymouth_quit (FALSE);
     if (vt < 0)
         vt = vt_get_unused ();
+
+    return vt;
+}
+
+static UnitySystemCompositor *
+create_unity_system_compositor (SeatXLocal *seat)
+{
+    UnitySystemCompositor *compositor;
+    const gchar *command;
+    gint timeout, vt;
+
+    compositor = unity_system_compositor_new ();
+
+    command = seat_get_string_property (SEAT (seat), "unity-compositor-command");
+    if (command)
+        unity_system_compositor_set_command (compositor, command);
+
+    timeout = seat_get_integer_property (SEAT (seat), "unity-compositor-timeout");
+    if (timeout <= 0)
+        timeout = 60;
+    unity_system_compositor_set_timeout (compositor, timeout);
+
+    vt = get_vt (seat, DISPLAY_SERVER (compositor));
     if (vt >= 0)
-        x_server_local_set_vt (x_server, vt);
+        unity_system_compositor_set_vt (compositor, vt);
 
-    layout = seat_get_string_property (seat, "xserver-layout");
-    if (layout)
-        x_server_local_set_layout (x_server, layout);
+    return compositor;
+}
 
-    config_file = seat_get_string_property (seat, "xserver-config");
-    if (config_file)
-        x_server_local_set_config (x_server, config_file);
-  
-    allow_tcp = seat_get_boolean_property (seat, "xserver-allow-tcp");
-    x_server_local_set_allow_tcp (x_server, allow_tcp);    
+static UnitySystemCompositor *
+get_unity_system_compositor (SeatXLocal *seat)
+{
+    if (seat->priv->compositor)
+        return seat->priv->compositor;
 
-    xdmcp_manager = seat_get_string_property (seat, "xdmcp-manager");
-    if (xdmcp_manager)
-        x_server_local_set_xdmcp_server (x_server, xdmcp_manager);
+    seat->priv->compositor = create_unity_system_compositor (seat);
+    g_signal_connect (seat->priv->compositor, DISPLAY_SERVER_SIGNAL_STOPPED, G_CALLBACK (compositor_stopped_cb), seat);
 
-    port = seat_get_integer_property (seat, "xdmcp-port");
-    if (port > 0)
-        x_server_local_set_xdmcp_port (x_server, port);
+    return seat->priv->compositor;
+}
 
-    key_name = seat_get_string_property (seat, "xdmcp-key");
-    if (key_name)
-    {
-        gchar *dir, *path;
-        GKeyFile *keys;
-        gboolean result;
-        GError *error = NULL;
-
-        dir = config_get_string (config_get_instance (), "LightDM", "config-directory");
-        path = g_build_filename (dir, "keys.conf", NULL);
-        g_free (dir);
-
-        keys = g_key_file_new ();
-        result = g_key_file_load_from_file (keys, path, G_KEY_FILE_NONE, &error);
-        if (error)
-            g_debug ("Error getting key %s", error->message);
-        g_clear_error (&error);      
-
-        if (result)
-        {
-            gchar *key = NULL;
+static XServerLocal *
+create_x_server (SeatXLocal *seat)
+{
+    XServerLocal *x_server;
+    gchar *number;
+    XAuthority *cookie;
+    const gchar *command = NULL, *layout = NULL, *config_file = NULL;
+    gboolean allow_tcp;
+    gint vt;
 
-            if (g_key_file_has_key (keys, "keyring", key_name, NULL))
-                key = g_key_file_get_string (keys, "keyring", key_name, NULL);
-            else
-                g_debug ("Key %s not defined", key_name);
+    x_server = x_server_local_new ();
 
-            if (key)
-                x_server_local_set_xdmcp_key (x_server, key);
-            g_free (key);
-        }
+    vt = get_vt (seat, DISPLAY_SERVER (x_server));
+    if (vt >= 0)
+        x_server_local_set_vt (x_server, vt);
 
-        g_free (path);
-        g_key_file_free (keys);
-    }
+    if (vt > 0)
+        l_debug (seat, "Starting local X display on VT %d", vt);
+    else
+        l_debug (seat, "Starting local X display");
+
+    /* If running inside an X server use Xephyr instead */
+    if (g_getenv ("DISPLAY"))
+        command = "Xephyr";
+    if (!command)
+        command = seat_get_string_property (SEAT (seat), "xserver-command");
+    if (command)
+        x_server_local_set_command (x_server, command);
+
+    number = g_strdup_printf ("%d", x_server_get_display_number (X_SERVER (x_server)));
+    cookie = x_authority_new_local_cookie (number);
+    x_server_set_authority (X_SERVER (x_server), cookie);
+    g_free (number);
+    g_object_unref (cookie);
+
+    layout = seat_get_string_property (SEAT (seat), "xserver-layout");
+    if (layout)
+        x_server_local_set_layout (x_server, layout);
 
-    return DISPLAY_SERVER (x_server);
+    x_server_local_set_xdg_seat (x_server, seat_get_name (SEAT (seat)));
+
+    config_file = seat_get_string_property (SEAT (seat), "xserver-config");
+    if (config_file)
+        x_server_local_set_config (x_server, config_file);
+
+    allow_tcp = seat_get_boolean_property (SEAT (seat), "xserver-allow-tcp");
+    x_server_local_set_allow_tcp (x_server, allow_tcp);
+
+    return x_server;
 }
 
 static DisplayServer *
-create_mir_server (Seat *seat)
+create_wayland_session (SeatXLocal *seat)
 {
-    MirServer *mir_server;
+    WaylandSession *session;
+    gint vt;
+
+    session = wayland_session_new ();
 
-    mir_server = mir_server_new ();
-    mir_server_set_vt (mir_server, vt_get_unused ());
+    vt = get_vt (seat, DISPLAY_SERVER (session));
+    if (vt >= 0)
+        wayland_session_set_vt (session, vt);
 
-    return DISPLAY_SERVER (mir_server);
+    return DISPLAY_SERVER (session);
 }
 
 static DisplayServer *
-seat_xlocal_create_display_server (Seat *seat, const gchar *session_type)
-{  
+seat_xlocal_create_display_server (Seat *s, Session *session)
+{
+    SeatXLocal *seat = SEAT_XLOCAL (s);
+    const gchar *session_type;
+
+    session_type = session_get_session_type (session);
     if (strcmp (session_type, "x") == 0)
-        return create_x_server (seat);
+        return DISPLAY_SERVER (create_x_server (seat));
     else if (strcmp (session_type, "mir") == 0)
-        return create_mir_server (seat);
+        return g_object_ref (get_unity_system_compositor (seat));
+    else if (strcmp (session_type, "wayland") == 0)
+        return create_wayland_session (seat);
+    else if (strcmp (session_type, "mir-container") == 0)
+    {
+        UnitySystemCompositor *compositor;
+        const gchar *compositor_command;
+
+        compositor = create_unity_system_compositor (seat);
+        compositor_command = session_config_get_compositor_command (session_get_config (session));
+        if (compositor_command)
+            unity_system_compositor_set_command (compositor, compositor_command);
+
+        return DISPLAY_SERVER (compositor);
+    }
     else
     {
-        g_warning ("Can't create unsupported display server '%s'", session_type);
+        l_warning (seat, "Can't create unsupported display server '%s'", session_type);
         return NULL;
     }
 }
 
 static gboolean
-seat_xlocal_display_server_supports_session_type (Seat *seat, DisplayServer *display_server, const gchar *session_type)
-{  
-    if (IS_X_SERVER (display_server) && strcmp (session_type, "x") == 0)
-        return TRUE;
-    if (IS_MIR_SERVER (display_server) && strcmp (session_type, "mir") == 0)
+seat_xlocal_display_server_is_used (Seat *seat, DisplayServer *display_server)
+{
+    if (display_server == DISPLAY_SERVER (SEAT_XLOCAL (seat)->priv->compositor))
         return TRUE;
 
-    return FALSE;
+    return SEAT_CLASS (seat_xlocal_parent_class)->display_server_is_used (seat, display_server);
 }
 
-static Greeter *
+static GreeterSession *
 seat_xlocal_create_greeter_session (Seat *seat)
 {
-    Greeter *greeter_session;
+    GreeterSession *greeter_session;
 
     greeter_session = SEAT_CLASS (seat_xlocal_parent_class)->create_greeter_session (seat);
-    session_set_env (SESSION (greeter_session), "XDG_SEAT", "seat0");
+    session_set_env (SESSION (greeter_session), "XDG_SEAT", seat_get_name (seat));
 
     return greeter_session;
 }
@@ -213,24 +343,36 @@ seat_xlocal_create_session (Seat *seat)
     Session *session;
 
     session = SEAT_CLASS (seat_xlocal_parent_class)->create_session (seat);
-    session_set_env (SESSION (session), "XDG_SEAT", "seat0");
+    session_set_env (SESSION (session), "XDG_SEAT", seat_get_name (seat));
 
     return session;
 }
 
 static void
-seat_xlocal_set_active_session (Seat *seat, Session *session)
+seat_xlocal_set_active_session (Seat *s, Session *session)
 {
-    gint vt = display_server_get_vt (session_get_display_server (session));
+    SeatXLocal *seat = SEAT_XLOCAL (s);
+    DisplayServer *display_server;
+
+    display_server = session_get_display_server (session);
+
+    gint vt = display_server_get_vt (display_server);
     if (vt >= 0)
         vt_set_active (vt);
 
-    SEAT_CLASS (seat_xlocal_parent_class)->set_active_session (seat, session);
+    g_clear_object (&seat->priv->active_compositor_session);
+    if (IS_UNITY_SYSTEM_COMPOSITOR (display_server)) {
+        unity_system_compositor_set_active_session (UNITY_SYSTEM_COMPOSITOR (display_server), session_get_env (session, "MIR_SERVER_NAME"));
+        seat->priv->active_compositor_session = g_object_ref (session);
+    }
+
+    SEAT_CLASS (seat_xlocal_parent_class)->set_active_session (s, session);
 }
 
 static Session *
-seat_xlocal_get_active_session (Seat *seat)
+seat_xlocal_get_active_session (Seat *s)
 {
+    SeatXLocal *seat = SEAT_XLOCAL (s);
     gint vt;
     GList *link;
 
@@ -238,48 +380,118 @@ seat_xlocal_get_active_session (Seat *seat)
     if (vt < 0)
         return NULL;
 
-    for (link = seat_get_sessions (seat); link; link = link->next)
+    /* If the compositor is active return the session it is displaying */
+    if (seat->priv->compositor && display_server_get_vt (DISPLAY_SERVER (seat->priv->compositor)) == vt)
+        return seat->priv->active_compositor_session;
+
+    /* Otherwise find out which session is on this VT */
+    for (link = seat_get_sessions (s); link; link = link->next)
     {
         Session *session = link->data;
-        if (display_server_get_vt (session_get_display_server (session)) == vt)
+        DisplayServer *display_server;
+
+        display_server = session_get_display_server (session);
+        if (display_server && display_server_get_vt (display_server) == vt)
             return session;
     }
 
     return NULL;
 }
 
+static void
+seat_xlocal_set_next_session (Seat *seat, Session *session)
+{
+    const gchar *id = NULL;
+
+    if (!session)
+        return;
+
+    id = session_get_env (session, "MIR_SERVER_NAME");
+    if (id)
+    {
+        l_debug (seat, "Marking Mir session %s as the next session", id);
+        unity_system_compositor_set_next_session (SEAT_XLOCAL (seat)->priv->compositor, id);
+    }
+    else
+        l_debug (seat, "Failed to work out session ID to mark");
+
+    SEAT_CLASS (seat_xlocal_parent_class)->set_next_session (seat, session);
+}
+
 static void
 seat_xlocal_run_script (Seat *seat, DisplayServer *display_server, Process *script)
 {
-    const gchar *path;
-    XServerLocal *x_server;
+    if (IS_X_SERVER_LOCAL (display_server))
+    {
+        const gchar *path;
+        XServerLocal *x_server;
 
-    x_server = X_SERVER_LOCAL (display_server);
-    path = x_server_local_get_authority_file_path (x_server);
-    process_set_env (script, "DISPLAY", x_server_get_address (X_SERVER (x_server)));
-    process_set_env (script, "XAUTHORITY", path);
+        x_server = X_SERVER_LOCAL (display_server);
+        path = x_server_local_get_authority_file_path (x_server);
+        process_set_env (script, "DISPLAY", x_server_get_address (X_SERVER (x_server)));
+        process_set_env (script, "XAUTHORITY", path);
+    }
 
     SEAT_CLASS (seat_xlocal_parent_class)->run_script (seat, display_server, script);
 }
 
+static void
+seat_xlocal_stop (Seat *s)
+{
+    SeatXLocal *seat = SEAT_XLOCAL (s);
+
+    /* Stop the compositor */
+    if (seat->priv->compositor)
+        display_server_stop (DISPLAY_SERVER (seat->priv->compositor));
+
+    /* Stop the XDMCP X server */
+    if (seat->priv->xdmcp_x_server)
+        display_server_stop (DISPLAY_SERVER (seat->priv->xdmcp_x_server));
+
+    check_stopped (seat);
+}
+
 static void
 seat_xlocal_init (SeatXLocal *seat)
 {
+    seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_XLOCAL_TYPE, SeatXLocalPrivate);
+}
+
+static void
+seat_xlocal_finalize (GObject *object)
+{
+    SeatXLocal *seat = SEAT_XLOCAL (object);
+
+    g_clear_object (&seat->priv->compositor);
+    g_clear_object (&seat->priv->active_compositor_session);
+    if (seat->priv->xdmcp_x_server)
+    {
+        g_signal_handlers_disconnect_matched (seat->priv->xdmcp_x_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
+        g_object_unref (seat->priv->xdmcp_x_server);
+    }
+
+    G_OBJECT_CLASS (seat_xlocal_parent_class)->finalize (object);
 }
 
 static void
 seat_xlocal_class_init (SeatXLocalClass *klass)
 {
+    GObjectClass *object_class = G_OBJECT_CLASS (klass);
     SeatClass *seat_class = SEAT_CLASS (klass);
 
-    seat_class->get_start_local_sessions = seat_xlocal_get_start_local_sessions;
+    object_class->finalize = seat_xlocal_finalize;
+
     seat_class->setup = seat_xlocal_setup;
     seat_class->start = seat_xlocal_start;
     seat_class->create_display_server = seat_xlocal_create_display_server;
-    seat_class->display_server_supports_session_type = seat_xlocal_display_server_supports_session_type;
+    seat_class->display_server_is_used = seat_xlocal_display_server_is_used;
     seat_class->create_greeter_session = seat_xlocal_create_greeter_session;
     seat_class->create_session = seat_xlocal_create_session;
     seat_class->set_active_session = seat_xlocal_set_active_session;
     seat_class->get_active_session = seat_xlocal_get_active_session;
+    seat_class->set_next_session = seat_xlocal_set_next_session;
     seat_class->run_script = seat_xlocal_run_script;
+    seat_class->stop = seat_xlocal_stop;
+
+    g_type_class_add_private (klass, sizeof (SeatXLocalPrivate));
 }