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-rw-r--r--smclient/eggsmclient-xsmp.c1370
1 files changed, 1370 insertions, 0 deletions
diff --git a/smclient/eggsmclient-xsmp.c b/smclient/eggsmclient-xsmp.c
new file mode 100644
index 0000000000..8bebfba060
--- /dev/null
+++ b/smclient/eggsmclient-xsmp.c
@@ -0,0 +1,1370 @@
+/*
+ * Copyright (C) 2007 Novell, Inc.
+ *
+ * Inspired by various other pieces of code including GsmClient (C)
+ * 2001 Havoc Pennington, GnomeClient (C) 1998 Carsten Schaar, and twm
+ * session code (C) 1998 The Open Group.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "eggsmclient.h"
+#include "eggsmclient-private.h"
+
+#include "eggdesktopfile.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <X11/SM/SMlib.h>
+
+#include <gdk/gdk.h>
+
+#define EGG_TYPE_SM_CLIENT_XSMP (egg_sm_client_xsmp_get_type ())
+#define EGG_SM_CLIENT_XSMP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMP))
+#define EGG_SM_CLIENT_XSMP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMPClass))
+#define EGG_IS_SM_CLIENT_XSMP(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EGG_TYPE_SM_CLIENT_XSMP))
+#define EGG_IS_SM_CLIENT_XSMP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EGG_TYPE_SM_CLIENT_XSMP))
+#define EGG_SM_CLIENT_XSMP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMPClass))
+
+typedef struct _EggSMClientXSMP EggSMClientXSMP;
+typedef struct _EggSMClientXSMPClass EggSMClientXSMPClass;
+
+/* These mostly correspond to the similarly-named states in section
+ * 9.1 of the XSMP spec. Some of the states there aren't represented
+ * here, because we don't need them. SHUTDOWN_CANCELLED is slightly
+ * different from the spec; we use it when the client is IDLE after a
+ * ShutdownCancelled message, but the application is still interacting
+ * and doesn't know the shutdown has been cancelled yet.
+ */
+typedef enum
+{
+ XSMP_STATE_IDLE,
+ XSMP_STATE_SAVE_YOURSELF,
+ XSMP_STATE_INTERACT_REQUEST,
+ XSMP_STATE_INTERACT,
+ XSMP_STATE_SAVE_YOURSELF_DONE,
+ XSMP_STATE_SHUTDOWN_CANCELLED,
+ XSMP_STATE_CONNECTION_CLOSED
+} EggSMClientXSMPState;
+
+static const char *state_names[] = {
+ "idle",
+ "save-yourself",
+ "interact-request",
+ "interact",
+ "save-yourself-done",
+ "shutdown-cancelled",
+ "connection-closed"
+};
+
+#define EGG_SM_CLIENT_XSMP_STATE(xsmp) (state_names[(xsmp)->state])
+
+struct _EggSMClientXSMP
+{
+ EggSMClient parent;
+
+ SmcConn connection;
+ char *client_id;
+
+ EggSMClientXSMPState state;
+ char **restart_command;
+ gboolean set_restart_command;
+ int restart_style;
+
+ guint idle;
+
+ /* Current SaveYourself state */
+ guint expecting_initial_save_yourself : 1;
+ guint need_save_state : 1;
+ guint need_quit_requested : 1;
+ guint interact_errors : 1;
+ guint shutting_down : 1;
+
+ /* Todo list */
+ guint waiting_to_set_initial_properties : 1;
+ guint waiting_to_emit_quit : 1;
+ guint waiting_to_emit_quit_cancelled : 1;
+ guint waiting_to_save_myself : 1;
+
+};
+
+struct _EggSMClientXSMPClass
+{
+ EggSMClientClass parent_class;
+
+};
+
+static void sm_client_xsmp_startup (EggSMClient *client,
+ const char *client_id);
+static void sm_client_xsmp_set_restart_command (EggSMClient *client,
+ int argc,
+ const char **argv);
+static void sm_client_xsmp_will_quit (EggSMClient *client,
+ gboolean will_quit);
+static gboolean sm_client_xsmp_end_session (EggSMClient *client,
+ EggSMClientEndStyle style,
+ gboolean request_confirmation);
+
+static void xsmp_save_yourself (SmcConn smc_conn,
+ SmPointer client_data,
+ int save_style,
+ Bool shutdown,
+ int interact_style,
+ Bool fast);
+static void xsmp_die (SmcConn smc_conn,
+ SmPointer client_data);
+static void xsmp_save_complete (SmcConn smc_conn,
+ SmPointer client_data);
+static void xsmp_shutdown_cancelled (SmcConn smc_conn,
+ SmPointer client_data);
+static void xsmp_interact (SmcConn smc_conn,
+ SmPointer client_data);
+
+static SmProp *array_prop (const char *name,
+ ...);
+static SmProp *ptrarray_prop (const char *name,
+ GPtrArray *values);
+static SmProp *string_prop (const char *name,
+ const char *value);
+static SmProp *card8_prop (const char *name,
+ unsigned char value);
+
+static void set_properties (EggSMClientXSMP *xsmp, ...);
+static void delete_properties (EggSMClientXSMP *xsmp, ...);
+
+static GPtrArray *generate_command (char **restart_command,
+ const char *client_id,
+ const char *state_file);
+
+static void save_state (EggSMClientXSMP *xsmp);
+static void do_save_yourself (EggSMClientXSMP *xsmp);
+static void update_pending_events (EggSMClientXSMP *xsmp);
+
+static void ice_init (void);
+static gboolean process_ice_messages (IceConn ice_conn);
+static void smc_error_handler (SmcConn smc_conn,
+ Bool swap,
+ int offending_minor_opcode,
+ unsigned long offending_sequence,
+ int error_class,
+ int severity,
+ SmPointer values);
+
+G_DEFINE_TYPE (EggSMClientXSMP, egg_sm_client_xsmp, EGG_TYPE_SM_CLIENT)
+
+static void
+egg_sm_client_xsmp_init (EggSMClientXSMP *xsmp)
+{
+ xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
+ xsmp->connection = NULL;
+ xsmp->restart_style = SmRestartIfRunning;
+}
+
+static void
+egg_sm_client_xsmp_class_init (EggSMClientXSMPClass *klass)
+{
+ EggSMClientClass *sm_client_class = EGG_SM_CLIENT_CLASS (klass);
+
+ sm_client_class->startup = sm_client_xsmp_startup;
+ sm_client_class->set_restart_command = sm_client_xsmp_set_restart_command;
+ sm_client_class->will_quit = sm_client_xsmp_will_quit;
+ sm_client_class->end_session = sm_client_xsmp_end_session;
+}
+
+EggSMClient *
+egg_sm_client_xsmp_new (void)
+{
+ if (!g_getenv ("SESSION_MANAGER"))
+ return NULL;
+
+ return g_object_new (EGG_TYPE_SM_CLIENT_XSMP, NULL);
+}
+
+static gboolean
+sm_client_xsmp_set_initial_properties (gpointer user_data)
+{
+ EggSMClientXSMP *xsmp = user_data;
+ EggDesktopFile *desktop_file;
+ GPtrArray *clone, *restart;
+ char pid_str[64];
+
+ if (xsmp->idle)
+ {
+ g_source_remove (xsmp->idle);
+ xsmp->idle = 0;
+ }
+ xsmp->waiting_to_set_initial_properties = FALSE;
+
+ if (egg_sm_client_get_mode () == EGG_SM_CLIENT_MODE_NO_RESTART)
+ xsmp->restart_style = SmRestartNever;
+
+ /* Parse info out of desktop file */
+ desktop_file = egg_get_desktop_file ();
+ if (desktop_file)
+ {
+ GError *err = NULL;
+ char *cmdline, **argv;
+ int argc;
+
+ if (xsmp->restart_style == SmRestartIfRunning)
+ {
+ if (egg_desktop_file_get_boolean (desktop_file,
+ "X-GNOME-AutoRestart", NULL))
+ xsmp->restart_style = SmRestartImmediately;
+ }
+
+ if (!xsmp->set_restart_command)
+ {
+ cmdline = egg_desktop_file_parse_exec (desktop_file, NULL, &err);
+ if (cmdline && g_shell_parse_argv (cmdline, &argc, &argv, &err))
+ {
+ egg_sm_client_set_restart_command (EGG_SM_CLIENT (xsmp),
+ argc, (const char **)argv);
+ g_strfreev (argv);
+ }
+ else
+ {
+ g_warning ("Could not parse Exec line in desktop file: %s",
+ err->message);
+ g_error_free (err);
+ }
+ g_free (cmdline);
+ }
+ }
+
+ if (!xsmp->set_restart_command)
+ xsmp->restart_command = g_strsplit (g_get_prgname (), " ", -1);
+
+ clone = generate_command (xsmp->restart_command, NULL, NULL);
+ restart = generate_command (xsmp->restart_command, xsmp->client_id, NULL);
+
+ g_debug ("Setting initial properties");
+
+ /* Program, CloneCommand, RestartCommand, and UserID are required.
+ * ProcessID isn't required, but the SM may be able to do something
+ * useful with it.
+ */
+ g_snprintf (pid_str, sizeof (pid_str), "%lu", (gulong) getpid ());
+ set_properties (xsmp,
+ string_prop (SmProgram, g_get_prgname ()),
+ ptrarray_prop (SmCloneCommand, clone),
+ ptrarray_prop (SmRestartCommand, restart),
+ string_prop (SmUserID, g_get_user_name ()),
+ string_prop (SmProcessID, pid_str),
+ card8_prop (SmRestartStyleHint, xsmp->restart_style),
+ NULL);
+ g_ptr_array_free (clone, TRUE);
+ g_ptr_array_free (restart, TRUE);
+
+ if (desktop_file)
+ {
+ set_properties (xsmp,
+ string_prop ("_GSM_DesktopFile", egg_desktop_file_get_source (desktop_file)),
+ NULL);
+ }
+
+ update_pending_events (xsmp);
+ return FALSE;
+}
+
+/* This gets called from two different places: xsmp_die() (when the
+ * server asks us to disconnect) and process_ice_messages() (when the
+ * server disconnects unexpectedly).
+ */
+static void
+sm_client_xsmp_disconnect (EggSMClientXSMP *xsmp)
+{
+ SmcConn connection;
+
+ if (!xsmp->connection)
+ return;
+
+ g_debug ("Disconnecting");
+
+ connection = xsmp->connection;
+ xsmp->connection = NULL;
+ SmcCloseConnection (connection, 0, NULL);
+ xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
+
+ xsmp->waiting_to_save_myself = FALSE;
+ update_pending_events (xsmp);
+}
+
+static void
+sm_client_xsmp_startup (EggSMClient *client,
+ const char *client_id)
+{
+ EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
+ SmcCallbacks callbacks;
+ char *ret_client_id;
+ char error_string_ret[256];
+
+ xsmp->client_id = g_strdup (client_id);
+
+ ice_init ();
+ SmcSetErrorHandler (smc_error_handler);
+
+ callbacks.save_yourself.callback = xsmp_save_yourself;
+ callbacks.die.callback = xsmp_die;
+ callbacks.save_complete.callback = xsmp_save_complete;
+ callbacks.shutdown_cancelled.callback = xsmp_shutdown_cancelled;
+
+ callbacks.save_yourself.client_data = xsmp;
+ callbacks.die.client_data = xsmp;
+ callbacks.save_complete.client_data = xsmp;
+ callbacks.shutdown_cancelled.client_data = xsmp;
+
+ client_id = NULL;
+ error_string_ret[0] = '\0';
+ xsmp->connection =
+ SmcOpenConnection (NULL, xsmp, SmProtoMajor, SmProtoMinor,
+ SmcSaveYourselfProcMask | SmcDieProcMask |
+ SmcSaveCompleteProcMask |
+ SmcShutdownCancelledProcMask,
+ &callbacks,
+ xsmp->client_id, &ret_client_id,
+ sizeof (error_string_ret), error_string_ret);
+
+ if (!xsmp->connection)
+ {
+ g_warning ("Failed to connect to the session manager: %s\n",
+ error_string_ret[0] ?
+ error_string_ret : "no error message given");
+ xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
+ return;
+ }
+
+ /* We expect a pointless initial SaveYourself if either (a) we
+ * didn't have an initial client ID, or (b) we DID have an initial
+ * client ID, but the server rejected it and gave us a new one.
+ */
+ if (!xsmp->client_id ||
+ (ret_client_id && strcmp (xsmp->client_id, ret_client_id) != 0))
+ xsmp->expecting_initial_save_yourself = TRUE;
+
+ if (ret_client_id)
+ {
+ g_free (xsmp->client_id);
+ xsmp->client_id = g_strdup (ret_client_id);
+ free (ret_client_id);
+
+ gdk_threads_enter ();
+ gdk_set_sm_client_id (xsmp->client_id);
+ gdk_threads_leave ();
+
+ g_debug ("Got client ID \"%s\"", xsmp->client_id);
+ }
+
+ xsmp->state = XSMP_STATE_IDLE;
+
+ /* Do not set the initial properties until we reach the main loop,
+ * so that the application has a chance to call
+ * egg_set_desktop_file(). (This may also help the session manager
+ * have a better idea of when the application is fully up and
+ * running.)
+ */
+ xsmp->waiting_to_set_initial_properties = TRUE;
+ xsmp->idle = g_idle_add (sm_client_xsmp_set_initial_properties, client);
+}
+
+static void
+sm_client_xsmp_set_restart_command (EggSMClient *client,
+ int argc,
+ const char **argv)
+{
+ EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
+ int i;
+
+ g_strfreev (xsmp->restart_command);
+
+ xsmp->restart_command = g_new (char *, argc + 1);
+ for (i = 0; i < argc; i++)
+ xsmp->restart_command[i] = g_strdup (argv[i]);
+ xsmp->restart_command[i] = NULL;
+
+ xsmp->set_restart_command = TRUE;
+}
+
+static void
+sm_client_xsmp_will_quit (EggSMClient *client,
+ gboolean will_quit)
+{
+ EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
+
+ if (xsmp->state == XSMP_STATE_CONNECTION_CLOSED)
+ {
+ /* The session manager has already exited! Schedule a quit
+ * signal.
+ */
+ xsmp->waiting_to_emit_quit = TRUE;
+ update_pending_events (xsmp);
+ return;
+ }
+ else if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
+ {
+ /* We received a ShutdownCancelled message while the application
+ * was interacting; Schedule a quit_cancelled signal.
+ */
+ xsmp->waiting_to_emit_quit_cancelled = TRUE;
+ update_pending_events (xsmp);
+ return;
+ }
+
+ g_return_if_fail (xsmp->state == XSMP_STATE_INTERACT);
+
+ g_debug ("Sending InteractDone(%s)", will_quit ? "False" : "True");
+ SmcInteractDone (xsmp->connection, !will_quit);
+
+ if (will_quit && xsmp->need_save_state)
+ save_state (xsmp);
+
+ g_debug ("Sending SaveYourselfDone(%s)", will_quit ? "True" : "False");
+ SmcSaveYourselfDone (xsmp->connection, will_quit);
+ xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
+}
+
+static gboolean
+sm_client_xsmp_end_session (EggSMClient *client,
+ EggSMClientEndStyle style,
+ gboolean request_confirmation)
+{
+ EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
+ int save_type;
+
+ /* To end the session via XSMP, we have to send a
+ * SaveYourselfRequest. We aren't allowed to do that if anything
+ * else is going on, but we don't want to expose this fact to the
+ * application. So we do our best to patch things up here...
+ *
+ * In the worst case, this method might block for some length of
+ * time in process_ice_messages, but the only time that code path is
+ * honestly likely to get hit is if the application tries to end the
+ * session as the very first thing it does, in which case it
+ * probably won't actually block anyway. It's not worth gunking up
+ * the API to try to deal nicely with the other 0.01% of cases where
+ * this happens.
+ */
+
+ while (xsmp->state != XSMP_STATE_IDLE ||
+ xsmp->expecting_initial_save_yourself)
+ {
+ /* If we're already shutting down, we don't need to do anything. */
+ if (xsmp->shutting_down)
+ return TRUE;
+
+ switch (xsmp->state)
+ {
+ case XSMP_STATE_CONNECTION_CLOSED:
+ return FALSE;
+
+ case XSMP_STATE_SAVE_YOURSELF:
+ /* Trying to log out from the save_state callback? Whatever.
+ * Abort the save_state.
+ */
+ SmcSaveYourselfDone (xsmp->connection, FALSE);
+ xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
+ break;
+
+ case XSMP_STATE_INTERACT_REQUEST:
+ case XSMP_STATE_INTERACT:
+ case XSMP_STATE_SHUTDOWN_CANCELLED:
+ /* Already in a shutdown-related state, just ignore
+ * the new shutdown request...
+ */
+ return TRUE;
+
+ case XSMP_STATE_IDLE:
+ if (xsmp->waiting_to_set_initial_properties)
+ sm_client_xsmp_set_initial_properties (xsmp);
+
+ if (!xsmp->expecting_initial_save_yourself)
+ break;
+ /* else fall through */
+
+ case XSMP_STATE_SAVE_YOURSELF_DONE:
+ /* We need to wait for some response from the server.*/
+ process_ice_messages (SmcGetIceConnection (xsmp->connection));
+ break;
+
+ default:
+ /* Hm... shouldn't happen */
+ return FALSE;
+ }
+ }
+
+ /* xfce4-session will do the wrong thing if we pass SmSaveGlobal and
+ * the user chooses to save the session. But gnome-session will do
+ * the wrong thing if we pass SmSaveBoth and the user chooses NOT to
+ * save the session... Sigh.
+ */
+ if (!strcmp (SmcVendor (xsmp->connection), "xfce4-session"))
+ save_type = SmSaveBoth;
+ else
+ save_type = SmSaveGlobal;
+
+ g_debug ("Sending SaveYourselfRequest(SmSaveGlobal, Shutdown, SmInteractStyleAny, %sFast)", request_confirmation ? "!" : "");
+ SmcRequestSaveYourself (xsmp->connection,
+ save_type,
+ True, /* shutdown */
+ SmInteractStyleAny,
+ !request_confirmation, /* fast */
+ True /* global */);
+ return TRUE;
+}
+
+static gboolean
+idle_do_pending_events (gpointer data)
+{
+ EggSMClientXSMP *xsmp = data;
+ EggSMClient *client = data;
+
+ gdk_threads_enter ();
+
+ xsmp->idle = 0;
+
+ if (xsmp->waiting_to_emit_quit)
+ {
+ xsmp->waiting_to_emit_quit = FALSE;
+ egg_sm_client_quit (client);
+ goto out;
+ }
+
+ if (xsmp->waiting_to_emit_quit_cancelled)
+ {
+ xsmp->waiting_to_emit_quit_cancelled = FALSE;
+ egg_sm_client_quit_cancelled (client);
+ xsmp->state = XSMP_STATE_IDLE;
+ }
+
+ if (xsmp->waiting_to_save_myself)
+ {
+ xsmp->waiting_to_save_myself = FALSE;
+ do_save_yourself (xsmp);
+ }
+
+ out:
+ gdk_threads_leave ();
+ return FALSE;
+}
+
+static void
+update_pending_events (EggSMClientXSMP *xsmp)
+{
+ gboolean want_idle =
+ xsmp->waiting_to_emit_quit ||
+ xsmp->waiting_to_emit_quit_cancelled ||
+ xsmp->waiting_to_save_myself;
+
+ if (want_idle)
+ {
+ if (xsmp->idle == 0)
+ xsmp->idle = g_idle_add (idle_do_pending_events, xsmp);
+ }
+ else
+ {
+ if (xsmp->idle != 0)
+ g_source_remove (xsmp->idle);
+ xsmp->idle = 0;
+ }
+}
+
+static void
+fix_broken_state (EggSMClientXSMP *xsmp, const char *message,
+ gboolean send_interact_done,
+ gboolean send_save_yourself_done)
+{
+ g_warning ("Received XSMP %s message in state %s: client or server error",
+ message, EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ /* Forget any pending SaveYourself plans we had */
+ xsmp->waiting_to_save_myself = FALSE;
+ update_pending_events (xsmp);
+
+ if (send_interact_done)
+ SmcInteractDone (xsmp->connection, False);
+ if (send_save_yourself_done)
+ SmcSaveYourselfDone (xsmp->connection, True);
+
+ xsmp->state = send_save_yourself_done ? XSMP_STATE_SAVE_YOURSELF_DONE : XSMP_STATE_IDLE;
+}
+
+/* SM callbacks */
+
+static void
+xsmp_save_yourself (SmcConn smc_conn,
+ SmPointer client_data,
+ int save_type,
+ Bool shutdown,
+ int interact_style,
+ Bool fast)
+{
+ EggSMClientXSMP *xsmp = client_data;
+ gboolean wants_quit_requested;
+
+ g_debug ("Received SaveYourself(%s, %s, %s, %s) in state %s",
+ save_type == SmSaveLocal ? "SmSaveLocal" :
+ save_type == SmSaveGlobal ? "SmSaveGlobal" : "SmSaveBoth",
+ shutdown ? "Shutdown" : "!Shutdown",
+ interact_style == SmInteractStyleAny ? "SmInteractStyleAny" :
+ interact_style == SmInteractStyleErrors ? "SmInteractStyleErrors" :
+ "SmInteractStyleNone", fast ? "Fast" : "!Fast",
+ EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ if (xsmp->state != XSMP_STATE_IDLE &&
+ xsmp->state != XSMP_STATE_SHUTDOWN_CANCELLED)
+ {
+ fix_broken_state (xsmp, "SaveYourself", FALSE, TRUE);
+ return;
+ }
+
+ if (xsmp->waiting_to_set_initial_properties)
+ sm_client_xsmp_set_initial_properties (xsmp);
+
+ /* If this is the initial SaveYourself, ignore it; we've already set
+ * properties and there's no reason to actually save state too.
+ */
+ if (xsmp->expecting_initial_save_yourself)
+ {
+ xsmp->expecting_initial_save_yourself = FALSE;
+
+ if (save_type == SmSaveLocal &&
+ interact_style == SmInteractStyleNone &&
+ !shutdown && !fast)
+ {
+ g_debug ("Sending SaveYourselfDone(True) for initial SaveYourself");
+ SmcSaveYourselfDone (xsmp->connection, True);
+ /* As explained in the comment at the end of
+ * do_save_yourself(), SAVE_YOURSELF_DONE is the correct
+ * state here, not IDLE.
+ */
+ xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
+ return;
+ }
+ else
+ g_warning ("First SaveYourself was not the expected one!");
+ }
+
+ /* Even ignoring the "fast" flag completely, there are still 18
+ * different combinations of save_type, shutdown and interact_style.
+ * We interpret them as follows:
+ *
+ * Type Shutdown Interact Interpretation
+ * G F A/E/N do nothing (1)
+ * G T N do nothing (1)*
+ * G T A/E quit_requested (2)
+ * L/B F A/E/N save_state (3)
+ * L/B T N save_state (3)*
+ * L/B T A/E quit_requested, then save_state (4)
+ *
+ * 1. Do nothing, because the SM asked us to do something
+ * uninteresting (save open files, but then don't quit
+ * afterward) or rude (save open files without asking the user
+ * for confirmation).
+ *
+ * 2. Request interaction and then emit ::quit_requested. This
+ * perhaps isn't quite correct for the SmInteractStyleErrors
+ * case, but we don't care.
+ *
+ * 3. Emit ::save_state. The SmSaveBoth SaveYourselfs in these
+ * rows essentially get demoted to SmSaveLocal, because their
+ * Global halves correspond to "do nothing".
+ *
+ * 4. Request interaction, emit ::quit_requested, and then emit
+ * ::save_state after interacting. This is the SmSaveBoth
+ * equivalent of #2, but we also promote SmSaveLocal shutdown
+ * SaveYourselfs to SmSaveBoth here, because we want to give
+ * the user a chance to save open files before quitting.
+ *
+ * (* It would be nice if we could do something useful when the
+ * session manager sends a SaveYourself with shutdown True and
+ * SmInteractStyleNone. But we can't, so we just pretend it didn't
+ * even tell us it was shutting down. The docs for ::quit mention
+ * that it might not always be preceded by ::quit_requested.)
+ */
+
+ /* As an optimization, we don't actually request interaction and
+ * emit ::quit_requested if the application isn't listening to the
+ * signal.
+ */
+ wants_quit_requested = g_signal_has_handler_pending (xsmp, g_signal_lookup ("quit_requested", EGG_TYPE_SM_CLIENT), 0, FALSE);
+
+ xsmp->need_save_state = (save_type != SmSaveGlobal);
+ xsmp->need_quit_requested = (shutdown && wants_quit_requested &&
+ interact_style != SmInteractStyleNone);
+ xsmp->interact_errors = (interact_style == SmInteractStyleErrors);
+
+ xsmp->shutting_down = shutdown;
+
+ do_save_yourself (xsmp);
+}
+
+static void
+do_save_yourself (EggSMClientXSMP *xsmp)
+{
+ if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
+ {
+ /* The SM cancelled a previous SaveYourself, but we haven't yet
+ * had a chance to tell the application, so we can't start
+ * processing this SaveYourself yet.
+ */
+ xsmp->waiting_to_save_myself = TRUE;
+ update_pending_events (xsmp);
+ return;
+ }
+
+ if (xsmp->need_quit_requested)
+ {
+ xsmp->state = XSMP_STATE_INTERACT_REQUEST;
+
+ g_debug ("Sending InteractRequest(%s)",
+ xsmp->interact_errors ? "Error" : "Normal");
+ SmcInteractRequest (xsmp->connection,
+ xsmp->interact_errors ? SmDialogError : SmDialogNormal,
+ xsmp_interact,
+ xsmp);
+ return;
+ }
+
+ if (xsmp->need_save_state)
+ {
+ save_state (xsmp);
+
+ /* Though unlikely, the client could have been disconnected
+ * while the application was saving its state.
+ */
+ if (!xsmp->connection)
+ return;
+ }
+
+ g_debug ("Sending SaveYourselfDone(True)");
+ SmcSaveYourselfDone (xsmp->connection, True);
+
+ /* The client state diagram in the XSMP spec says that after a
+ * non-shutdown SaveYourself, we go directly back to "idle". But
+ * everything else in both the XSMP spec and the libSM docs
+ * disagrees.
+ */
+ xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
+}
+
+static void
+save_state (EggSMClientXSMP *xsmp)
+{
+ GKeyFile *state_file;
+ char *state_file_path, *data;
+ EggDesktopFile *desktop_file;
+ GPtrArray *restart;
+ int offset, fd;
+
+ /* We set xsmp->state before emitting save_state, but our caller is
+ * responsible for setting it back afterward.
+ */
+ xsmp->state = XSMP_STATE_SAVE_YOURSELF;
+
+ state_file = egg_sm_client_save_state ((EggSMClient *)xsmp);
+ if (!state_file)
+ {
+ restart = generate_command (xsmp->restart_command, xsmp->client_id, NULL);
+ set_properties (xsmp,
+ ptrarray_prop (SmRestartCommand, restart),
+ NULL);
+ g_ptr_array_free (restart, TRUE);
+ delete_properties (xsmp, SmDiscardCommand, NULL);
+ return;
+ }
+
+ desktop_file = egg_get_desktop_file ();
+ if (desktop_file)
+ {
+ GKeyFile *merged_file;
+ char *desktop_file_path;
+
+ merged_file = g_key_file_new ();
+ desktop_file_path =
+ g_filename_from_uri (egg_desktop_file_get_source (desktop_file),
+ NULL, NULL);
+ if (desktop_file_path &&
+ g_key_file_load_from_file (merged_file, desktop_file_path,
+ G_KEY_FILE_KEEP_COMMENTS |
+ G_KEY_FILE_KEEP_TRANSLATIONS, NULL))
+ {
+ guint g, k, i;
+ char **groups, **keys, *value, *exec;
+
+ groups = g_key_file_get_groups (state_file, NULL);
+ for (g = 0; groups[g]; g++)
+ {
+ keys = g_key_file_get_keys (state_file, groups[g], NULL, NULL);
+ for (k = 0; keys[k]; k++)
+ {
+ value = g_key_file_get_value (state_file, groups[g],
+ keys[k], NULL);
+ if (value)
+ {
+ g_key_file_set_value (merged_file, groups[g],
+ keys[k], value);
+ g_free (value);
+ }
+ }
+ g_strfreev (keys);
+ }
+ g_strfreev (groups);
+
+ g_key_file_free (state_file);
+ state_file = merged_file;
+
+ /* Update Exec key using "--sm-client-state-file %k" */
+ restart = generate_command (xsmp->restart_command,
+ NULL, "%k");
+ for (i = 0; i < restart->len; i++)
+ restart->pdata[i] = g_shell_quote (restart->pdata[i]);
+ g_ptr_array_add (restart, NULL);
+ exec = g_strjoinv (" ", (char **)restart->pdata);
+ g_strfreev ((char **)restart->pdata);
+ g_ptr_array_free (restart, FALSE);
+
+ g_key_file_set_string (state_file, EGG_DESKTOP_FILE_GROUP,
+ EGG_DESKTOP_FILE_KEY_EXEC,
+ exec);
+ g_free (exec);
+ }
+ else
+ desktop_file = NULL;
+
+ g_free (desktop_file_path);
+ }
+
+ /* Now write state_file to disk. (We can't use mktemp(), because
+ * that requires the filename to end with "XXXXXX", and we want
+ * it to end with ".desktop".)
+ */
+
+ data = g_key_file_to_data (state_file, NULL, NULL);
+ g_key_file_free (state_file);
+
+ offset = 0;
+ while (1)
+ {
+ state_file_path = g_strdup_printf ("%s%csession-state%c%s-%ld.%s",
+ g_get_user_config_dir (),
+ G_DIR_SEPARATOR, G_DIR_SEPARATOR,
+ g_get_prgname (),
+ (long)time (NULL) + offset,
+ desktop_file ? "desktop" : "state");
+
+ fd = open (state_file_path, O_WRONLY | O_CREAT | O_EXCL, 0644);
+ if (fd == -1)
+ {
+ if (errno == EEXIST)
+ {
+ offset++;
+ g_free (state_file_path);
+ continue;
+ }
+ else if (errno == ENOTDIR || errno == ENOENT)
+ {
+ char *sep = strrchr (state_file_path, G_DIR_SEPARATOR);
+
+ *sep = '\0';
+ if (g_mkdir_with_parents (state_file_path, 0755) != 0)
+ {
+ g_warning ("Could not create directory '%s'",
+ state_file_path);
+ g_free (state_file_path);
+ state_file_path = NULL;
+ break;
+ }
+
+ continue;
+ }
+
+ g_warning ("Could not create file '%s': %s",
+ state_file_path, g_strerror (errno));
+ g_free (state_file_path);
+ state_file_path = NULL;
+ break;
+ }
+
+ close (fd);
+ g_file_set_contents (state_file_path, data, -1, NULL);
+ break;
+ }
+ g_free (data);
+
+ restart = generate_command (xsmp->restart_command, xsmp->client_id,
+ state_file_path);
+ set_properties (xsmp,
+ ptrarray_prop (SmRestartCommand, restart),
+ NULL);
+ g_ptr_array_free (restart, TRUE);
+
+ if (state_file_path)
+ {
+ set_properties (xsmp,
+ array_prop (SmDiscardCommand,
+ "/bin/rm", "-rf", state_file_path,
+ NULL),
+ NULL);
+ g_free (state_file_path);
+ }
+}
+
+static void
+xsmp_interact (SmcConn smc_conn,
+ SmPointer client_data)
+{
+ EggSMClientXSMP *xsmp = client_data;
+ EggSMClient *client = client_data;
+
+ g_debug ("Received Interact message in state %s",
+ EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ if (xsmp->state != XSMP_STATE_INTERACT_REQUEST)
+ {
+ fix_broken_state (xsmp, "Interact", TRUE, TRUE);
+ return;
+ }
+
+ xsmp->state = XSMP_STATE_INTERACT;
+ egg_sm_client_quit_requested (client);
+}
+
+static void
+xsmp_die (SmcConn smc_conn,
+ SmPointer client_data)
+{
+ EggSMClientXSMP *xsmp = client_data;
+ EggSMClient *client = client_data;
+
+ g_debug ("Received Die message in state %s",
+ EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ sm_client_xsmp_disconnect (xsmp);
+ egg_sm_client_quit (client);
+}
+
+static void
+xsmp_save_complete (SmcConn smc_conn,
+ SmPointer client_data)
+{
+ EggSMClientXSMP *xsmp = client_data;
+
+ g_debug ("Received SaveComplete message in state %s",
+ EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ if (xsmp->state == XSMP_STATE_SAVE_YOURSELF_DONE)
+ xsmp->state = XSMP_STATE_IDLE;
+ else
+ fix_broken_state (xsmp, "SaveComplete", FALSE, FALSE);
+}
+
+static void
+xsmp_shutdown_cancelled (SmcConn smc_conn,
+ SmPointer client_data)
+{
+ EggSMClientXSMP *xsmp = client_data;
+ EggSMClient *client = client_data;
+
+ g_debug ("Received ShutdownCancelled message in state %s",
+ EGG_SM_CLIENT_XSMP_STATE (xsmp));
+
+ xsmp->shutting_down = FALSE;
+
+ if (xsmp->state == XSMP_STATE_SAVE_YOURSELF_DONE)
+ {
+ /* We've finished interacting and now the SM has agreed to
+ * cancel the shutdown.
+ */
+ xsmp->state = XSMP_STATE_IDLE;
+ egg_sm_client_quit_cancelled (client);
+ }
+ else if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
+ {
+ /* Hm... ok, so we got a shutdown SaveYourself, which got
+ * cancelled, but the application was still interacting, so we
+ * didn't tell it yet, and then *another* SaveYourself arrived,
+ * which we must still be waiting to tell the app about, except
+ * that now that SaveYourself has been cancelled too! Dizzy yet?
+ */
+ xsmp->waiting_to_save_myself = FALSE;
+ update_pending_events (xsmp);
+ }
+ else
+ {
+ g_debug ("Sending SaveYourselfDone(False)");
+ SmcSaveYourselfDone (xsmp->connection, False);
+
+ if (xsmp->state == XSMP_STATE_INTERACT)
+ {
+ /* The application is currently interacting, so we can't
+ * tell it about the cancellation yet; we will wait until
+ * after it calls egg_sm_client_will_quit().
+ */
+ xsmp->state = XSMP_STATE_SHUTDOWN_CANCELLED;
+ }
+ else
+ {
+ /* The shutdown was cancelled before the application got a
+ * chance to interact.
+ */
+ xsmp->state = XSMP_STATE_IDLE;
+ }
+ }
+}
+
+/* Utilities */
+
+/* Create a restart/clone/Exec command based on @restart_command.
+ * If @client_id is non-%NULL, add "--sm-client-id @client_id".
+ * If @state_file is non-%NULL, add "--sm-client-state-file @state_file".
+ *
+ * None of the input strings are g_strdup()ed; the caller must keep
+ * them around until it is done with the returned GPtrArray, and must
+ * then free the array, but not its contents.
+ */
+static GPtrArray *
+generate_command (char **restart_command, const char *client_id,
+ const char *state_file)
+{
+ GPtrArray *cmd;
+ int i;
+
+ cmd = g_ptr_array_new ();
+ g_ptr_array_add (cmd, restart_command[0]);
+
+ if (client_id)
+ {
+ g_ptr_array_add (cmd, (char *)"--sm-client-id");
+ g_ptr_array_add (cmd, (char *)client_id);
+ }
+
+ if (state_file)
+ {
+ g_ptr_array_add (cmd, (char *)"--sm-client-state-file");
+ g_ptr_array_add (cmd, (char *)state_file);
+ }
+
+ for (i = 1; restart_command[i]; i++)
+ g_ptr_array_add (cmd, restart_command[i]);
+
+ return cmd;
+}
+
+/* Takes a NULL-terminated list of SmProp * values, created by
+ * array_prop, ptrarray_prop, string_prop, card8_prop, sets them, and
+ * frees them.
+ */
+static void
+set_properties (EggSMClientXSMP *xsmp, ...)
+{
+ GPtrArray *props;
+ SmProp *prop;
+ va_list ap;
+ guint i;
+
+ props = g_ptr_array_new ();
+
+ va_start (ap, xsmp);
+ while ((prop = va_arg (ap, SmProp *)))
+ g_ptr_array_add (props, prop);
+ va_end (ap);
+
+ if (xsmp->connection)
+ {
+ SmcSetProperties (xsmp->connection, props->len,
+ (SmProp **)props->pdata);
+ }
+
+ for (i = 0; i < props->len; i++)
+ {
+ prop = props->pdata[i];
+ g_free (prop->vals);
+ g_free (prop);
+ }
+ g_ptr_array_free (props, TRUE);
+}
+
+/* Takes a NULL-terminated list of property names and deletes them. */
+static void
+delete_properties (EggSMClientXSMP *xsmp, ...)
+{
+ GPtrArray *props;
+ char *prop;
+ va_list ap;
+
+ if (!xsmp->connection)
+ return;
+
+ props = g_ptr_array_new ();
+
+ va_start (ap, xsmp);
+ while ((prop = va_arg (ap, char *)))
+ g_ptr_array_add (props, prop);
+ va_end (ap);
+
+ SmcDeleteProperties (xsmp->connection, props->len,
+ (char **)props->pdata);
+
+ g_ptr_array_free (props, TRUE);
+}
+
+/* Takes an array of strings and creates a LISTofARRAY8 property. The
+ * strings are neither dupped nor freed; they need to remain valid
+ * until you're done with the SmProp.
+ */
+static SmProp *
+array_prop (const char *name, ...)
+{
+ SmProp *prop;
+ SmPropValue pv;
+ GArray *vals;
+ char *value;
+ va_list ap;
+
+ prop = g_new (SmProp, 1);
+ prop->name = (char *)name;
+ prop->type = (char *)SmLISTofARRAY8;
+
+ vals = g_array_new (FALSE, FALSE, sizeof (SmPropValue));
+
+ va_start (ap, name);
+ while ((value = va_arg (ap, char *)))
+ {
+ pv.length = strlen (value);
+ pv.value = value;
+ g_array_append_val (vals, pv);
+ }
+
+ prop->num_vals = vals->len;
+ prop->vals = (SmPropValue *)vals->data;
+
+ g_array_free (vals, FALSE);
+
+ return prop;
+}
+
+/* Takes a GPtrArray of strings and creates a LISTofARRAY8 property.
+ * The array contents are neither dupped nor freed; they need to
+ * remain valid until you're done with the SmProp.
+ */
+static SmProp *
+ptrarray_prop (const char *name, GPtrArray *values)
+{
+ SmProp *prop;
+ SmPropValue pv;
+ GArray *vals;
+ guint i;
+
+ prop = g_new (SmProp, 1);
+ prop->name = (char *)name;
+ prop->type = (char *)SmLISTofARRAY8;
+
+ vals = g_array_new (FALSE, FALSE, sizeof (SmPropValue));
+
+ for (i = 0; i < values->len; i++)
+ {
+ pv.length = strlen (values->pdata[i]);
+ pv.value = values->pdata[i];
+ g_array_append_val (vals, pv);
+ }
+
+ prop->num_vals = vals->len;
+ prop->vals = (SmPropValue *)vals->data;
+
+ g_array_free (vals, FALSE);
+
+ return prop;
+}
+
+/* Takes a string and creates an ARRAY8 property. The string is
+ * neither dupped nor freed; it needs to remain valid until you're
+ * done with the SmProp.
+ */
+static SmProp *
+string_prop (const char *name, const char *value)
+{
+ SmProp *prop;
+
+ prop = g_new (SmProp, 1);
+ prop->name = (char *)name;
+ prop->type = (char *)SmARRAY8;
+
+ prop->num_vals = 1;
+ prop->vals = g_new (SmPropValue, 1);
+
+ prop->vals[0].length = strlen (value);
+ prop->vals[0].value = (char *)value;
+
+ return prop;
+}
+
+/* Takes a char and creates a CARD8 property. */
+static SmProp *
+card8_prop (const char *name, unsigned char value)
+{
+ SmProp *prop;
+ char *card8val;
+
+ /* To avoid having to allocate and free prop->vals[0], we cheat and
+ * make vals a 2-element-long array and then use the second element
+ * to store value.
+ */
+
+ prop = g_new (SmProp, 1);
+ prop->name = (char *)name;
+ prop->type = (char *)SmCARD8;
+
+ prop->num_vals = 1;
+ prop->vals = g_new (SmPropValue, 2);
+ card8val = (char *)(&prop->vals[1]);
+ card8val[0] = value;
+
+ prop->vals[0].length = 1;
+ prop->vals[0].value = card8val;
+
+ return prop;
+}
+
+/* ICE code. This makes no effort to play nice with anyone else trying
+ * to use libICE. Fortunately, no one uses libICE for anything other
+ * than SM. (DCOP uses ICE, but it has its own private copy of
+ * libICE.)
+ *
+ * When this moves to gtk, it will need to be cleverer, to avoid
+ * tripping over old apps that use GnomeClient or that use libSM
+ * directly.
+ */
+
+#include <X11/ICE/ICElib.h>
+#include <fcntl.h>
+
+static void ice_error_handler (IceConn ice_conn,
+ Bool swap,
+ int offending_minor_opcode,
+ unsigned long offending_sequence,
+ int error_class,
+ int severity,
+ IcePointer values);
+static void ice_io_error_handler (IceConn ice_conn);
+static void ice_connection_watch (IceConn ice_conn,
+ IcePointer client_data,
+ Bool opening,
+ IcePointer *watch_data);
+
+static void
+ice_init (void)
+{
+ IceSetIOErrorHandler (ice_io_error_handler);
+ IceSetErrorHandler (ice_error_handler);
+ IceAddConnectionWatch (ice_connection_watch, NULL);
+}
+
+static gboolean
+process_ice_messages (IceConn ice_conn)
+{
+ IceProcessMessagesStatus status;
+
+ gdk_threads_enter ();
+ status = IceProcessMessages (ice_conn, NULL, NULL);
+ gdk_threads_leave ();
+
+ switch (status)
+ {
+ case IceProcessMessagesSuccess:
+ return TRUE;
+
+ case IceProcessMessagesIOError:
+ sm_client_xsmp_disconnect (IceGetConnectionContext (ice_conn));
+ return FALSE;
+
+ case IceProcessMessagesConnectionClosed:
+ return FALSE;
+
+ default:
+ g_assert_not_reached ();
+ }
+}
+
+static gboolean
+ice_iochannel_watch (GIOChannel *channel,
+ GIOCondition condition,
+ gpointer client_data)
+{
+ return process_ice_messages (client_data);
+}
+
+static void
+ice_connection_watch (IceConn ice_conn,
+ IcePointer client_data,
+ Bool opening,
+ IcePointer *watch_data)
+{
+ guint watch_id;
+
+ if (opening)
+ {
+ GIOChannel *channel;
+ int fd = IceConnectionNumber (ice_conn);
+
+ fcntl (fd, F_SETFD, fcntl (fd, F_GETFD, 0) | FD_CLOEXEC);
+ channel = g_io_channel_unix_new (fd);
+ watch_id = g_io_add_watch (channel, G_IO_IN | G_IO_ERR,
+ ice_iochannel_watch, ice_conn);
+ g_io_channel_unref (channel);
+
+ *watch_data = GUINT_TO_POINTER (watch_id);
+ }
+ else
+ {
+ watch_id = GPOINTER_TO_UINT (*watch_data);
+ g_source_remove (watch_id);
+ }
+}
+
+static void
+ice_error_handler (IceConn ice_conn,
+ Bool swap,
+ int offending_minor_opcode,
+ unsigned long offending_sequence,
+ int error_class,
+ int severity,
+ IcePointer values)
+{
+ /* Do nothing */
+}
+
+static void
+ice_io_error_handler (IceConn ice_conn)
+{
+ /* Do nothing */
+}
+
+static void
+smc_error_handler (SmcConn smc_conn,
+ Bool swap,
+ int offending_minor_opcode,
+ unsigned long offending_sequence,
+ int error_class,
+ int severity,
+ SmPointer values)
+{
+ /* Do nothing */
+}
generated by cgit (git 2.34.1) at 2024-11-18 21:47:55 +0800