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xed/pluma/smclient/eggsmclient-xsmp.c

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/*
* Copyright (C) 2007 Novell, Inc.
*
* Inspired by various other pieces of code including GsmClient (C)
* 2001 Havoc Pennington, MateClient (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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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>
#include <gdk/gdkx.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-MATE-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_x11_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 mate-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);
}
va_end (ap);
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 MateClient 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 */
}
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