cut-n-paste/smclient/eggsmclient-xsmp.c

   1 /*
   2  * Copyright (C) 2007 Novell, Inc.
   3  *
   4  * Inspired by various other pieces of code including GsmClient (C)
   5  * 2001 Havoc Pennington, GnomeClient (C) 1998 Carsten Schaar, and twm
   6  * session code (C) 1998 The Open Group.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 #include "config.h"
  25
  26 #include "eggsmclient.h"
  27 #include "eggsmclient-private.h"
  28
  29 #include "eggdesktopfile.h"
  30
  31 #include <errno.h>
  32 #include <fcntl.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <unistd.h>
  36 #include <X11/SM/SMlib.h>
  37
  38 #include <gdk/gdk.h>
  39
  40 #define EGG_TYPE_SM_CLIENT_XSMP            (egg_sm_client_xsmp_get_type ())
  41 #define EGG_SM_CLIENT_XSMP(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMP))
  42 #define EGG_SM_CLIENT_XSMP_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMPClass))
  43 #define EGG_IS_SM_CLIENT_XSMP(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EGG_TYPE_SM_CLIENT_XSMP))
  44 #define EGG_IS_SM_CLIENT_XSMP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EGG_TYPE_SM_CLIENT_XSMP))
  45 #define EGG_SM_CLIENT_XSMP_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EGG_TYPE_SM_CLIENT_XSMP, EggSMClientXSMPClass))
  46
  47 typedef struct _EggSMClientXSMP        EggSMClientXSMP;
  48 typedef struct _EggSMClientXSMPClass   EggSMClientXSMPClass;
  49
  50 /* These mostly correspond to the similarly-named states in section
  51  * 9.1 of the XSMP spec. Some of the states there aren't represented
  52  * here, because we don't need them. SHUTDOWN_CANCELLED is slightly
  53  * different from the spec; we use it when the client is IDLE after a
  54  * ShutdownCancelled message, but the application is still interacting
  55  * and doesn't know the shutdown has been cancelled yet.
  56  */
  57 typedef enum
  58 {
  59   XSMP_STATE_IDLE,
  60   XSMP_STATE_SAVE_YOURSELF,
  61   XSMP_STATE_INTERACT_REQUEST,
  62   XSMP_STATE_INTERACT,
  63   XSMP_STATE_SAVE_YOURSELF_DONE,
  64   XSMP_STATE_SHUTDOWN_CANCELLED,
  65   XSMP_STATE_CONNECTION_CLOSED,
  66 } EggSMClientXSMPState;
  67
  68 static const char *state_names[] = {
  69   "start",
  70   "idle",
  71   "save-yourself",
  72   "interact-request",
  73   "interact",
  74   "save-yourself-done",
  75   "shutdown-cancelled",
  76   "connection-closed"
  77 };
  78
  79 #define EGG_SM_CLIENT_XSMP_STATE(xsmp) (state_names[(xsmp)->state])
  80
  81 struct _EggSMClientXSMP
  82 {
  83   EggSMClient parent;
  84
  85   SmcConn connection;
  86   char *client_id;
  87
  88   EggSMClientXSMPState state;
  89   char **restart_command;
  90   gboolean set_restart_command;
  91   int restart_style;
  92
  93   guint idle;
  94
  95   /* Current SaveYourself state */
  96   guint expecting_initial_save_yourself : 1;
  97   guint need_save_state : 1;
  98   guint need_quit_requested : 1;
  99   guint interact_errors : 1;
 100   guint shutting_down : 1;
 101
 102   /* Todo list */
 103   guint waiting_to_set_initial_properties : 1;
 104   guint waiting_to_emit_quit : 1;
 105   guint waiting_to_emit_quit_cancelled : 1;
 106   guint waiting_to_save_myself : 1;
 107
 108 };
 109
 110 struct _EggSMClientXSMPClass
 111 {
 112   EggSMClientClass parent_class;
 113
 114 };
 115
 116 static void     sm_client_xsmp_startup (EggSMClient *client,
 117                                         const char  *client_id);
 118 static void     sm_client_xsmp_set_restart_command (EggSMClient  *client,
 119                                                     int           argc,
 120                                                     const char  **argv);
 121 static void     sm_client_xsmp_will_quit (EggSMClient *client,
 122                                           gboolean     will_quit);
 123 static gboolean sm_client_xsmp_end_session (EggSMClient         *client,
 124                                             EggSMClientEndStyle  style,
 125                                             gboolean  request_confirmation);
 126
 127 static void xsmp_save_yourself      (SmcConn   smc_conn,
 128                                      SmPointer client_data,
 129                                      int       save_style,
 130                                      Bool      shutdown,
 131                                      int       interact_style,
 132                                      Bool      fast);
 133 static void xsmp_die                (SmcConn   smc_conn,
 134                                      SmPointer client_data);
 135 static void xsmp_save_complete      (SmcConn   smc_conn,
 136                                      SmPointer client_data);
 137 static void xsmp_shutdown_cancelled (SmcConn   smc_conn,
 138                                      SmPointer client_data);
 139 static void xsmp_interact           (SmcConn   smc_conn,
 140                                      SmPointer client_data);
 141
 142 static SmProp *array_prop        (const char    *name,
 143                                   ...);
 144 static SmProp *ptrarray_prop     (const char    *name,
 145                                   GPtrArray     *values);
 146 static SmProp *string_prop       (const char    *name,
 147                                   const char    *value);
 148 static SmProp *card8_prop        (const char    *name,
 149                                   unsigned char  value);
 150
 151 static void set_properties         (EggSMClientXSMP *xsmp, ...);
 152 static void delete_properties      (EggSMClientXSMP *xsmp, ...);
 153
 154 static GPtrArray *generate_command (char       **restart_command,
 155                                     const char  *client_id,
 156                                     const char  *state_file);
 157
 158 static void save_state            (EggSMClientXSMP *xsmp);
 159 static void do_save_yourself      (EggSMClientXSMP *xsmp);
 160 static void update_pending_events (EggSMClientXSMP *xsmp);
 161
 162 static void     ice_init             (void);
 163 static gboolean process_ice_messages (IceConn       ice_conn);
 164 static void     smc_error_handler    (SmcConn       smc_conn,
 165                                       Bool          swap,
 166                                       int           offending_minor_opcode,
 167                                       unsigned long offending_sequence,
 168                                       int           error_class,
 169                                       int           severity,
 170                                       SmPointer     values);
 171
 172 G_DEFINE_TYPE (EggSMClientXSMP, egg_sm_client_xsmp, EGG_TYPE_SM_CLIENT)
 173
 174 static void
 175 egg_sm_client_xsmp_init (EggSMClientXSMP *xsmp)
 176 {
 177   xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
 178   xsmp->connection = NULL;
 179   xsmp->restart_style = SmRestartIfRunning;
 180 }
 181
 182 static void
 183 egg_sm_client_xsmp_class_init (EggSMClientXSMPClass *klass)
 184 {
 185   EggSMClientClass *sm_client_class = EGG_SM_CLIENT_CLASS (klass);
 186
 187   sm_client_class->startup             = sm_client_xsmp_startup;
 188   sm_client_class->set_restart_command = sm_client_xsmp_set_restart_command;
 189   sm_client_class->will_quit           = sm_client_xsmp_will_quit;
 190   sm_client_class->end_session         = sm_client_xsmp_end_session;
 191 }
 192
 193 EggSMClient *
 194 egg_sm_client_xsmp_new (void)
 195 {
 196   if (!g_getenv ("SESSION_MANAGER"))
 197     return NULL;
 198
 199   return g_object_new (EGG_TYPE_SM_CLIENT_XSMP, NULL);
 200 }
 201
 202 static gboolean
 203 sm_client_xsmp_set_initial_properties (gpointer user_data)
 204 {
 205   EggSMClientXSMP *xsmp = user_data;
 206   EggDesktopFile *desktop_file;
 207   GPtrArray *clone, *restart;
 208   char pid_str[64];
 209
 210   if (xsmp->idle)
 211     {
 212       g_source_remove (xsmp->idle);
 213       xsmp->idle = 0;
 214     }
 215   xsmp->waiting_to_set_initial_properties = FALSE;
 216
 217   if (egg_sm_client_get_mode () == EGG_SM_CLIENT_MODE_NO_RESTART)
 218     xsmp->restart_style = SmRestartNever;
 219
 220   /* Parse info out of desktop file */
 221   desktop_file = egg_get_desktop_file ();
 222   if (desktop_file)
 223     {
 224       GKeyFile *key_file;
 225       GError *err = NULL;
 226       char *cmdline, **argv;
 227       int argc;
 228
 229       key_file = egg_desktop_file_get_key_file (desktop_file);
 230
 231       if (xsmp->restart_style == SmRestartIfRunning)
 232         {
 233           if (g_key_file_has_key (key_file, EGG_DESKTOP_FILE_GROUP,
 234                                   "X-GNOME-AutoRestart", NULL) &&
 235               g_key_file_get_boolean (key_file, EGG_DESKTOP_FILE_GROUP,
 236                                       "X-GNOME-AutoRestart", NULL))
 237             xsmp->restart_style = SmRestartImmediately;
 238         }
 239
 240       if (!xsmp->set_restart_command)
 241         {
 242           cmdline = egg_desktop_file_parse_exec (desktop_file, NULL, &err);
 243           if (cmdline && g_shell_parse_argv (cmdline, &argc, &argv, &err))
 244             {
 245               egg_sm_client_set_restart_command (EGG_SM_CLIENT (xsmp),
 246                                                  argc, (const char **)argv);
 247               g_strfreev (argv);
 248             }
 249           else
 250             {
 251               g_warning ("Could not parse Exec line in desktop file: %s",
 252                          err->message);
 253               g_error_free (err);
 254             }
 255         }
 256     }
 257
 258   if (!xsmp->set_restart_command)
 259     xsmp->restart_command = g_strsplit (g_get_prgname (), " ", -1);
 260
 261   clone = generate_command (xsmp->restart_command, NULL, NULL);
 262   restart = generate_command (xsmp->restart_command, xsmp->client_id, NULL);
 263
 264   g_debug ("Setting initial properties");
 265
 266   /* Program, CloneCommand, RestartCommand, and UserID are required.
 267    * ProcessID isn't required, but the SM may be able to do something
 268    * useful with it.
 269    */
 270   g_snprintf (pid_str, sizeof (pid_str), "%lu", (gulong) getpid ());
 271   set_properties (xsmp,
 272                   string_prop   (SmProgram, g_get_prgname ()),
 273                   ptrarray_prop (SmCloneCommand, clone),
 274                   ptrarray_prop (SmRestartCommand, restart),
 275                   string_prop   (SmUserID, g_get_user_name ()),
 276                   string_prop   (SmProcessID, pid_str),
 277                   card8_prop    (SmRestartStyleHint, xsmp->restart_style),
 278                   NULL);
 279   g_ptr_array_free (clone, TRUE);
 280   g_ptr_array_free (restart, TRUE);
 281
 282   if (desktop_file)
 283     {
 284       set_properties (xsmp,
 285                       string_prop ("_GSM_DesktopFile", egg_desktop_file_get_source (desktop_file)),
 286                       NULL);
 287     }
 288
 289   update_pending_events (xsmp);
 290   return FALSE;
 291 }
 292
 293 /* This gets called from two different places: xsmp_die() (when the
 294  * server asks us to disconnect) and process_ice_messages() (when the
 295  * server disconnects unexpectedly).
 296  */
 297 static void
 298 sm_client_xsmp_disconnect (EggSMClientXSMP *xsmp)
 299 {
 300   SmcConn connection;
 301
 302   if (!xsmp->connection)
 303     return;
 304
 305   g_debug ("Disconnecting");
 306
 307   connection = xsmp->connection;
 308   xsmp->connection = NULL;
 309   SmcCloseConnection (connection, 0, NULL);
 310   xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
 311
 312   xsmp->waiting_to_save_myself = FALSE;
 313   update_pending_events (xsmp);
 314 }
 315
 316 static void
 317 sm_client_xsmp_startup (EggSMClient *client,
 318                         const char  *client_id)
 319 {
 320   EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
 321   SmcCallbacks callbacks;
 322   char *ret_client_id;
 323   char error_string_ret[256];
 324
 325   xsmp->client_id = g_strdup (client_id);
 326
 327   ice_init ();
 328   SmcSetErrorHandler (smc_error_handler);
 329
 330   callbacks.save_yourself.callback      = xsmp_save_yourself;
 331   callbacks.die.callback                = xsmp_die;
 332   callbacks.save_complete.callback      = xsmp_save_complete;
 333   callbacks.shutdown_cancelled.callback = xsmp_shutdown_cancelled;
 334
 335   callbacks.save_yourself.client_data      = xsmp;
 336   callbacks.die.client_data                = xsmp;
 337   callbacks.save_complete.client_data      = xsmp;
 338   callbacks.shutdown_cancelled.client_data = xsmp;
 339
 340   client_id = NULL;
 341   error_string_ret[0] = '\0';
 342   xsmp->connection =
 343     SmcOpenConnection (NULL, xsmp, SmProtoMajor, SmProtoMinor,
 344                        SmcSaveYourselfProcMask | SmcDieProcMask |
 345                        SmcSaveCompleteProcMask |
 346                        SmcShutdownCancelledProcMask,
 347                        &callbacks,
 348                        xsmp->client_id, &ret_client_id,
 349                        sizeof (error_string_ret), error_string_ret);
 350
 351   if (!xsmp->connection)
 352     {
 353       g_warning ("Failed to connect to the session manager: %s\n",
 354                  error_string_ret[0] ?
 355                  error_string_ret : "no error message given");
 356       xsmp->state = XSMP_STATE_CONNECTION_CLOSED;
 357       return;
 358     }
 359
 360   /* We expect a pointless initial SaveYourself if either (a) we
 361    * didn't have an initial client ID, or (b) we DID have an initial
 362    * client ID, but the server rejected it and gave us a new one.
 363    */
 364   if (!xsmp->client_id ||
 365       (ret_client_id && strcmp (xsmp->client_id, ret_client_id) != 0))
 366     xsmp->expecting_initial_save_yourself = TRUE;
 367
 368   if (ret_client_id)
 369     {
 370       g_free (xsmp->client_id);
 371       xsmp->client_id = g_strdup (ret_client_id);
 372       free (ret_client_id);
 373
 374       gdk_threads_enter ();
 375       gdk_set_sm_client_id (xsmp->client_id);
 376       gdk_threads_leave ();
 377
 378       g_debug ("Got client ID \"%s\"", xsmp->client_id);
 379     }
 380
 381   xsmp->state = XSMP_STATE_IDLE;
 382
 383   /* Do not set the initial properties until we reach the main loop,
 384    * so that the application has a chance to call
 385    * egg_set_desktop_file(). (This may also help the session manager
 386    * have a better idea of when the application is fully up and
 387    * running.)
 388    */
 389   xsmp->waiting_to_set_initial_properties = TRUE;
 390   xsmp->idle = g_idle_add (sm_client_xsmp_set_initial_properties, client);
 391 }
 392
 393 static void
 394 sm_client_xsmp_set_restart_command (EggSMClient  *client,
 395                                     int           argc,
 396                                     const char  **argv)
 397 {
 398   EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
 399   int i;
 400
 401   g_strfreev (xsmp->restart_command);
 402
 403   xsmp->restart_command = g_new (char *, argc + 1);
 404   for (i = 0; i < argc; i++)
 405     xsmp->restart_command[i] = g_strdup (argv[i]);
 406   xsmp->restart_command[i] = NULL;
 407
 408   xsmp->set_restart_command = TRUE;
 409 }
 410
 411 static void
 412 sm_client_xsmp_will_quit (EggSMClient *client,
 413                           gboolean     will_quit)
 414 {
 415   EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
 416
 417   if (xsmp->state == XSMP_STATE_CONNECTION_CLOSED)
 418     {
 419       /* The session manager has already exited! Schedule a quit
 420        * signal.
 421        */
 422       xsmp->waiting_to_emit_quit = TRUE;
 423       update_pending_events (xsmp);
 424       return;
 425     }
 426   else if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
 427     {
 428       /* We received a ShutdownCancelled message while the application
 429        * was interacting; Schedule a quit_cancelled signal.
 430        */
 431       xsmp->waiting_to_emit_quit_cancelled = TRUE;
 432       update_pending_events (xsmp);
 433       return;
 434     }
 435
 436   g_return_if_fail (xsmp->state == XSMP_STATE_INTERACT);
 437
 438   g_debug ("Sending InteractDone(%s)", will_quit ? "False" : "True");
 439   SmcInteractDone (xsmp->connection, !will_quit);
 440
 441   if (will_quit && xsmp->need_save_state)
 442     save_state (xsmp);
 443
 444   g_debug ("Sending SaveYourselfDone(%s)", will_quit ? "True" : "False");
 445   SmcSaveYourselfDone (xsmp->connection, will_quit);
 446   xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
 447 }
 448
 449 static gboolean
 450 sm_client_xsmp_end_session (EggSMClient         *client,
 451                             EggSMClientEndStyle  style,
 452                             gboolean             request_confirmation)
 453 {
 454   EggSMClientXSMP *xsmp = (EggSMClientXSMP *)client;
 455   int save_type;
 456
 457   /* To end the session via XSMP, we have to send a
 458    * SaveYourselfRequest. We aren't allowed to do that if anything
 459    * else is going on, but we don't want to expose this fact to the
 460    * application. So we do our best to patch things up here...
 461    *
 462    * In the worst case, this method might block for some length of
 463    * time in process_ice_messages, but the only time that code path is
 464    * honestly likely to get hit is if the application tries to end the
 465    * session as the very first thing it does, in which case it
 466    * probably won't actually block anyway. It's not worth gunking up
 467    * the API to try to deal nicely with the other 0.01% of cases where
 468    * this happens.
 469    */
 470
 471   while (xsmp->state != XSMP_STATE_IDLE ||
 472          xsmp->expecting_initial_save_yourself)
 473     {
 474       /* If we're already shutting down, we don't need to do anything. */
 475       if (xsmp->shutting_down)
 476         return TRUE;
 477
 478       switch (xsmp->state)
 479         {
 480         case XSMP_STATE_CONNECTION_CLOSED:
 481           return FALSE;
 482
 483         case XSMP_STATE_SAVE_YOURSELF:
 484           /* Trying to log out from the save_state callback? Whatever.
 485            * Abort the save_state.
 486            */
 487           SmcSaveYourselfDone (xsmp->connection, FALSE);
 488           xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
 489           break;
 490
 491         case XSMP_STATE_INTERACT_REQUEST:
 492         case XSMP_STATE_INTERACT:
 493         case XSMP_STATE_SHUTDOWN_CANCELLED:
 494           /* Already in a shutdown-related state, just ignore
 495            * the new shutdown request...
 496            */
 497           return TRUE;
 498
 499         case XSMP_STATE_IDLE:
 500           if (xsmp->waiting_to_set_initial_properties)
 501             sm_client_xsmp_set_initial_properties (xsmp);
 502
 503           if (!xsmp->expecting_initial_save_yourself)
 504             break;
 505           /* else fall through */
 506
 507         case XSMP_STATE_SAVE_YOURSELF_DONE:
 508           /* We need to wait for some response from the server.*/
 509           process_ice_messages (SmcGetIceConnection (xsmp->connection));
 510           break;
 511
 512         default:
 513           /* Hm... shouldn't happen */
 514           return FALSE;
 515         }
 516     }
 517
 518   /* xfce4-session will do the wrong thing if we pass SmSaveGlobal and
 519    * the user chooses to save the session. But gnome-session will do
 520    * the wrong thing if we pass SmSaveBoth and the user chooses NOT to
 521    * save the session... Sigh.
 522    */
 523   if (!strcmp (SmcVendor (xsmp->connection), "xfce4-session"))
 524     save_type = SmSaveBoth;
 525   else
 526     save_type = SmSaveGlobal;
 527
 528   g_debug ("Sending SaveYourselfRequest(SmSaveGlobal, Shutdown, SmInteractStyleAny, %sFast)", request_confirmation ? "!" : "");
 529   SmcRequestSaveYourself (xsmp->connection,
 530                           save_type,
 531                           True, /* shutdown */
 532                           SmInteractStyleAny,
 533                           !request_confirmation, /* fast */
 534                           True /* global */);
 535   return TRUE;
 536 }
 537
 538 static gboolean
 539 idle_do_pending_events (gpointer data)
 540 {
 541   EggSMClientXSMP *xsmp = data;
 542   EggSMClient *client = data;
 543
 544   gdk_threads_enter ();
 545
 546   xsmp->idle = 0;
 547
 548   if (xsmp->waiting_to_emit_quit)
 549     {
 550       xsmp->waiting_to_emit_quit = FALSE;
 551       egg_sm_client_quit (client);
 552       goto out;
 553     }
 554
 555   if (xsmp->waiting_to_emit_quit_cancelled)
 556     {
 557       xsmp->waiting_to_emit_quit_cancelled = FALSE;
 558       egg_sm_client_quit_cancelled (client);
 559       xsmp->state = XSMP_STATE_IDLE;
 560     }
 561
 562   if (xsmp->waiting_to_save_myself)
 563     {
 564       xsmp->waiting_to_save_myself = FALSE;
 565       do_save_yourself (xsmp);
 566     }
 567
 568  out:
 569   gdk_threads_leave ();
 570   return FALSE;
 571 }
 572
 573 static void
 574 update_pending_events (EggSMClientXSMP *xsmp)
 575 {
 576   gboolean want_idle =
 577     xsmp->waiting_to_emit_quit ||
 578     xsmp->waiting_to_emit_quit_cancelled ||
 579     xsmp->waiting_to_save_myself;
 580
 581   if (want_idle)
 582     {
 583       if (xsmp->idle == 0)
 584         xsmp->idle = g_idle_add (idle_do_pending_events, xsmp);
 585     }
 586   else
 587     {
 588       if (xsmp->idle != 0)
 589         g_source_remove (xsmp->idle);
 590       xsmp->idle = 0;
 591     }
 592 }
 593
 594 static void
 595 fix_broken_state (EggSMClientXSMP *xsmp, const char *message,
 596                   gboolean send_interact_done,
 597                   gboolean send_save_yourself_done)
 598 {
 599   g_warning ("Received XSMP %s message in state %s: client or server error",
 600              message, EGG_SM_CLIENT_XSMP_STATE (xsmp));
 601
 602   /* Forget any pending SaveYourself plans we had */
 603   xsmp->waiting_to_save_myself = FALSE;
 604   update_pending_events (xsmp);
 605
 606   if (send_interact_done)
 607     SmcInteractDone (xsmp->connection, False);
 608   if (send_save_yourself_done)
 609     SmcSaveYourselfDone (xsmp->connection, True);
 610
 611   xsmp->state = send_save_yourself_done ? XSMP_STATE_SAVE_YOURSELF_DONE : XSMP_STATE_IDLE;
 612 }
 613
 614 /* SM callbacks */
 615
 616 static void
 617 xsmp_save_yourself (SmcConn   smc_conn,
 618                     SmPointer client_data,
 619                     int       save_type,
 620                     Bool      shutdown,
 621                     int       interact_style,
 622                     Bool      fast)
 623 {
 624   EggSMClientXSMP *xsmp = client_data;
 625   gboolean wants_quit_requested;
 626
 627   g_debug ("Received SaveYourself(%s, %s, %s, %s) in state %s",
 628            save_type == SmSaveLocal ? "SmSaveLocal" :
 629            save_type == SmSaveGlobal ? "SmSaveGlobal" : "SmSaveBoth",
 630            shutdown ? "Shutdown" : "!Shutdown",
 631            interact_style == SmInteractStyleAny ? "SmInteractStyleAny" :
 632            interact_style == SmInteractStyleErrors ? "SmInteractStyleErrors" :
 633            "SmInteractStyleNone", fast ? "Fast" : "!Fast",
 634            EGG_SM_CLIENT_XSMP_STATE (xsmp));
 635
 636   if (xsmp->state != XSMP_STATE_IDLE &&
 637       xsmp->state != XSMP_STATE_SHUTDOWN_CANCELLED)
 638     {
 639       fix_broken_state (xsmp, "SaveYourself", FALSE, TRUE);
 640       return;
 641     }
 642
 643   if (xsmp->waiting_to_set_initial_properties)
 644     sm_client_xsmp_set_initial_properties (xsmp);
 645
 646   /* If this is the initial SaveYourself, ignore it; we've already set
 647    * properties and there's no reason to actually save state too.
 648    */
 649   if (xsmp->expecting_initial_save_yourself)
 650     {
 651       xsmp->expecting_initial_save_yourself = FALSE;
 652
 653       if (save_type == SmSaveLocal &&
 654           interact_style == SmInteractStyleNone &&
 655           !shutdown && !fast)
 656         {
 657           g_debug ("Sending SaveYourselfDone(True) for initial SaveYourself");
 658           SmcSaveYourselfDone (xsmp->connection, True);
 659           /* As explained in the comment at the end of
 660            * do_save_yourself(), SAVE_YOURSELF_DONE is the correct
 661            * state here, not IDLE.
 662            */
 663           xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
 664           return;
 665         }
 666       else
 667         g_warning ("First SaveYourself was not the expected one!");
 668     }
 669
 670   /* Even ignoring the "fast" flag completely, there are still 18
 671    * different combinations of save_type, shutdown and interact_style.
 672    * We interpret them as follows:
 673    *
 674    *   Type  Shutdown  Interact  Interpretation
 675    *     G      F       A/E/N    do nothing (1)
 676    *     G      T         N      do nothing (1)*
 677    *     G      T        A/E     quit_requested (2)
 678    *    L/B     F       A/E/N    save_state (3)
 679    *    L/B     T         N      save_state (3)*
 680    *    L/B     T        A/E     quit_requested, then save_state (4)
 681    *
 682    *   1. Do nothing, because the SM asked us to do something
 683    *      uninteresting (save open files, but then don't quit
 684    *      afterward) or rude (save open files without asking the user
 685    *      for confirmation).
 686    *
 687    *   2. Request interaction and then emit ::quit_requested. This
 688    *      perhaps isn't quite correct for the SmInteractStyleErrors
 689    *      case, but we don't care.
 690    *
 691    *   3. Emit ::save_state. The SmSaveBoth SaveYourselfs in these
 692    *      rows essentially get demoted to SmSaveLocal, because their
 693    *      Global halves correspond to "do nothing".
 694    *
 695    *   4. Request interaction, emit ::quit_requested, and then emit
 696    *      ::save_state after interacting. This is the SmSaveBoth
 697    *      equivalent of #2, but we also promote SmSaveLocal shutdown
 698    *      SaveYourselfs to SmSaveBoth here, because we want to give
 699    *      the user a chance to save open files before quitting.
 700    *
 701    * (* It would be nice if we could do something useful when the
 702    * session manager sends a SaveYourself with shutdown True and
 703    * SmInteractStyleNone. But we can't, so we just pretend it didn't
 704    * even tell us it was shutting down. The docs for ::quit mention
 705    * that it might not always be preceded by ::quit_requested.)
 706    */
 707
 708   /* As an optimization, we don't actually request interaction and
 709    * emit ::quit_requested if the application isn't listening to the
 710    * signal.
 711    */
 712   wants_quit_requested = g_signal_has_handler_pending (xsmp, g_signal_lookup ("quit_requested", EGG_TYPE_SM_CLIENT), 0, FALSE);
 713
 714   xsmp->need_save_state     = (save_type != SmSaveGlobal);
 715   xsmp->need_quit_requested = (shutdown && wants_quit_requested &&
 716                                interact_style != SmInteractStyleNone);
 717   xsmp->interact_errors     = (interact_style == SmInteractStyleErrors);
 718
 719   xsmp->shutting_down       = shutdown;
 720
 721   do_save_yourself (xsmp);
 722 }
 723
 724 static void
 725 do_save_yourself (EggSMClientXSMP *xsmp)
 726 {
 727   if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
 728     {
 729       /* The SM cancelled a previous SaveYourself, but we haven't yet
 730        * had a chance to tell the application, so we can't start
 731        * processing this SaveYourself yet.
 732        */
 733       xsmp->waiting_to_save_myself = TRUE;
 734       update_pending_events (xsmp);
 735       return;
 736     }
 737
 738   if (xsmp->need_quit_requested)
 739     {
 740       xsmp->state = XSMP_STATE_INTERACT_REQUEST;
 741
 742       g_debug ("Sending InteractRequest(%s)",
 743                xsmp->interact_errors ? "Error" : "Normal");
 744       SmcInteractRequest (xsmp->connection,
 745                           xsmp->interact_errors ? SmDialogError : SmDialogNormal,
 746                           xsmp_interact,
 747                           xsmp);
 748       return;
 749     }
 750
 751   if (xsmp->need_save_state)
 752     {
 753       save_state (xsmp);
 754
 755       /* Though unlikely, the client could have been disconnected
 756        * while the application was saving its state.
 757        */
 758       if (!xsmp->connection)
 759          return;
 760     }
 761
 762   g_debug ("Sending SaveYourselfDone(True)");
 763   SmcSaveYourselfDone (xsmp->connection, True);
 764
 765   /* The client state diagram in the XSMP spec says that after a
 766    * non-shutdown SaveYourself, we go directly back to "idle". But
 767    * everything else in both the XSMP spec and the libSM docs
 768    * disagrees.
 769    */
 770   xsmp->state = XSMP_STATE_SAVE_YOURSELF_DONE;
 771 }
 772
 773 static void
 774 merge_keyfiles (GKeyFile *dest, GKeyFile *source)
 775 {
 776   int g, k;
 777   char **groups, **keys, *value;
 778
 779   groups = g_key_file_get_groups (source, NULL);
 780   for (g = 0; groups[g]; g++)
 781     {
 782       keys = g_key_file_get_keys (source, groups[g], NULL, NULL);
 783       for (k = 0; keys[k]; k++)
 784         {
 785           value = g_key_file_get_value (source, groups[g], keys[k], NULL);
 786           if (value)
 787             {
 788               g_key_file_set_value (dest, groups[g], keys[k], value);
 789               g_free (value);
 790             }
 791         }
 792       g_strfreev (keys);
 793     }
 794   g_strfreev (groups);
 795 }
 796
 797 static void
 798 save_state (EggSMClientXSMP *xsmp)
 799 {
 800   GKeyFile *state_file;
 801   char *state_file_path, *data;
 802   EggDesktopFile *desktop_file;
 803   GPtrArray *restart;
 804   int offset, fd;
 805
 806   /* We set xsmp->state before emitting save_state, but our caller is
 807    * responsible for setting it back afterward.
 808    */
 809   xsmp->state = XSMP_STATE_SAVE_YOURSELF;
 810
 811   state_file = egg_sm_client_save_state ((EggSMClient *)xsmp);
 812   if (!state_file)
 813     {
 814       restart = generate_command (xsmp->restart_command, xsmp->client_id, NULL);
 815       set_properties (xsmp,
 816                       ptrarray_prop (SmRestartCommand, restart),
 817                       NULL);
 818       g_ptr_array_free (restart, TRUE);
 819       delete_properties (xsmp, SmDiscardCommand, NULL);
 820       return;
 821     }
 822
 823   desktop_file = egg_get_desktop_file ();
 824   if (desktop_file)
 825     {
 826       GKeyFile *merged_file;
 827       char *exec;
 828       int i;
 829
 830       merged_file = g_key_file_new ();
 831       merge_keyfiles (merged_file, egg_desktop_file_get_key_file (desktop_file));
 832       merge_keyfiles (merged_file, state_file);
 833
 834       g_key_file_free (state_file);
 835       state_file = merged_file;
 836
 837       /* Update Exec key using "--sm-client-state-file %k" */
 838       restart = generate_command (xsmp->restart_command,
 839                                   NULL, "%k");
 840       for (i = 0; i < restart->len; i++)
 841         restart->pdata[i] = g_shell_quote (restart->pdata[i]);
 842       g_ptr_array_add (restart, NULL);
 843       exec = g_strjoinv (" ", (char **)restart->pdata);
 844       g_strfreev ((char **)restart->pdata);
 845       g_ptr_array_free (restart, FALSE);
 846
 847       g_key_file_set_string (state_file, EGG_DESKTOP_FILE_GROUP,
 848                              EGG_DESKTOP_FILE_KEY_EXEC,
 849                              exec);
 850       g_free (exec);
 851     }
 852
 853   /* Now write state_file to disk. (We can't use mktemp(), because
 854    * that requires the filename to end with "XXXXXX", and we want
 855    * it to end with ".desktop".)
 856    */
 857
 858   data = g_key_file_to_data (state_file, NULL, NULL);
 859   g_key_file_free (state_file);
 860
 861   offset = 0;
 862   while (1)
 863     {
 864       state_file_path = g_strdup_printf ("%s%csession-state%c%s-%ld.%s",
 865                                          g_get_user_config_dir (),
 866                                          G_DIR_SEPARATOR, G_DIR_SEPARATOR,
 867                                          g_get_prgname (),
 868                                          (long)time (NULL) + offset,
 869                                          desktop_file ? "desktop" : "state");
 870
 871       fd = open (state_file_path, O_WRONLY | O_CREAT | O_EXCL, 0644);
 872       if (fd == -1)
 873         {
 874           if (errno == EEXIST)
 875             {
 876               offset++;
 877               g_free (state_file_path);
 878               continue;
 879             }
 880           else if (errno == ENOTDIR || errno == ENOENT)
 881             {
 882               char *sep = strrchr (state_file_path, G_DIR_SEPARATOR);
 883
 884               *sep = '\0';
 885               if (g_mkdir_with_parents (state_file_path, 0755) != 0)
 886                 {
 887                   g_warning ("Could not create directory '%s'",
 888                              state_file_path);
 889                   g_free (state_file_path);
 890                   state_file_path = NULL;
 891                   break;
 892                 }
 893
 894               continue;
 895             }
 896
 897           g_warning ("Could not create file '%s': %s",
 898                      state_file_path, g_strerror (errno));
 899           g_free (state_file_path);
 900           state_file_path = NULL;
 901           break;
 902         }
 903
 904       close (fd);
 905       g_file_set_contents (state_file_path, data, -1, NULL);
 906       break;
 907     }
 908   g_free (data);
 909
 910   restart = generate_command (xsmp->restart_command, xsmp->client_id,
 911                               state_file_path);
 912   set_properties (xsmp,
 913                   ptrarray_prop (SmRestartCommand, restart),
 914                   NULL);
 915   g_ptr_array_free (restart, TRUE);
 916
 917   if (state_file_path)
 918     {
 919       set_properties (xsmp,
 920                       array_prop (SmDiscardCommand,
 921                                   "/bin/rm", "-rf", state_file_path,
 922                                   NULL),
 923                       NULL);
 924       g_free (state_file_path);
 925     }
 926 }
 927
 928 static void
 929 xsmp_interact (SmcConn   smc_conn,
 930                SmPointer client_data)
 931 {
 932   EggSMClientXSMP *xsmp = client_data;
 933   EggSMClient *client = client_data;
 934
 935   g_debug ("Received Interact message in state %s",
 936            EGG_SM_CLIENT_XSMP_STATE (xsmp));
 937
 938   if (xsmp->state != XSMP_STATE_INTERACT_REQUEST)
 939     {
 940       fix_broken_state (xsmp, "Interact", TRUE, TRUE);
 941       return;
 942     }
 943
 944   xsmp->state = XSMP_STATE_INTERACT;
 945   egg_sm_client_quit_requested (client);
 946 }
 947
 948 static void
 949 xsmp_die (SmcConn   smc_conn,
 950           SmPointer client_data)
 951 {
 952   EggSMClientXSMP *xsmp = client_data;
 953   EggSMClient *client = client_data;
 954
 955   g_debug ("Received Die message in state %s",
 956            EGG_SM_CLIENT_XSMP_STATE (xsmp));
 957
 958   sm_client_xsmp_disconnect (xsmp);
 959   egg_sm_client_quit (client);
 960 }
 961
 962 static void
 963 xsmp_save_complete (SmcConn   smc_conn,
 964                     SmPointer client_data)
 965 {
 966   EggSMClientXSMP *xsmp = client_data;
 967
 968   g_debug ("Received SaveComplete message in state %s",
 969            EGG_SM_CLIENT_XSMP_STATE (xsmp));
 970
 971   if (xsmp->state == XSMP_STATE_SAVE_YOURSELF_DONE)
 972     xsmp->state = XSMP_STATE_IDLE;
 973   else
 974     fix_broken_state (xsmp, "SaveComplete", FALSE, FALSE);
 975 }
 976
 977 static void
 978 xsmp_shutdown_cancelled (SmcConn   smc_conn,
 979                          SmPointer client_data)
 980 {
 981   EggSMClientXSMP *xsmp = client_data;
 982   EggSMClient *client = client_data;
 983
 984   g_debug ("Received ShutdownCancelled message in state %s",
 985            EGG_SM_CLIENT_XSMP_STATE (xsmp));
 986
 987   xsmp->shutting_down = FALSE;
 988
 989   if (xsmp->state == XSMP_STATE_SAVE_YOURSELF_DONE)
 990     {
 991       /* We've finished interacting and now the SM has agreed to
 992        * cancel the shutdown.
 993        */
 994       xsmp->state = XSMP_STATE_IDLE;
 995       egg_sm_client_quit_cancelled (client);
 996     }
 997   else if (xsmp->state == XSMP_STATE_SHUTDOWN_CANCELLED)
 998     {
 999       /* Hm... ok, so we got a shutdown SaveYourself, which got
1000        * cancelled, but the application was still interacting, so we
1001        * didn't tell it yet, and then *another* SaveYourself arrived,
1002        * which we must still be waiting to tell the app about, except
1003        * that now that SaveYourself has been cancelled too! Dizzy yet?
1004        */
1005       xsmp->waiting_to_save_myself = FALSE;
1006       update_pending_events (xsmp);
1007     }
1008   else
1009     {
1010       g_debug ("Sending SaveYourselfDone(False)");
1011       SmcSaveYourselfDone (xsmp->connection, False);
1012
1013       if (xsmp->state == XSMP_STATE_INTERACT)
1014         {
1015           /* The application is currently interacting, so we can't
1016            * tell it about the cancellation yet; we will wait until
1017            * after it calls egg_sm_client_will_quit().
1018            */
1019           xsmp->state = XSMP_STATE_SHUTDOWN_CANCELLED;
1020         }
1021       else
1022         {
1023           /* The shutdown was cancelled before the application got a
1024            * chance to interact.
1025            */
1026           xsmp->state = XSMP_STATE_IDLE;
1027         }
1028     }
1029 }
1030
1031 /* Utilities */
1032
1033 /* Create a restart/clone/Exec command based on @restart_command.
1034  * If @client_id is non-%NULL, add "--sm-client-id @client_id".
1035  * If @state_file is non-%NULL, add "--sm-client-state-file @state_file".
1036  *
1037  * None of the input strings are g_strdup()ed; the caller must keep
1038  * them around until it is done with the returned GPtrArray, and must
1039  * then free the array, but not its contents.
1040  */
1041 static GPtrArray *
1042 generate_command (char **restart_command, const char *client_id,
1043                   const char *state_file)
1044 {
1045   GPtrArray *cmd;
1046   int i;
1047
1048   cmd = g_ptr_array_new ();
1049   g_ptr_array_add (cmd, restart_command[0]);
1050
1051   if (client_id)
1052     {
1053       g_ptr_array_add (cmd, "--sm-client-id");
1054       g_ptr_array_add (cmd, (char *)client_id);
1055     }
1056
1057   if (state_file)
1058     {
1059       g_ptr_array_add (cmd, "--sm-client-state-file");
1060       g_ptr_array_add (cmd, (char *)state_file);
1061     }
1062
1063   for (i = 1; restart_command[i]; i++)
1064     g_ptr_array_add (cmd, restart_command[i]);
1065
1066   return cmd;
1067 }
1068
1069 /* Takes a NULL-terminated list of SmProp * values, created by
1070  * array_prop, ptrarray_prop, string_prop, card8_prop, sets them, and
1071  * frees them.
1072  */
1073 static void
1074 set_properties (EggSMClientXSMP *xsmp, ...)
1075 {
1076   GPtrArray *props;
1077   SmProp *prop;
1078   va_list ap;
1079   int i;
1080
1081   props = g_ptr_array_new ();
1082
1083   va_start (ap, xsmp);
1084   while ((prop = va_arg (ap, SmProp *)))
1085     g_ptr_array_add (props, prop);
1086   va_end (ap);
1087
1088   if (xsmp->connection)
1089     {
1090       SmcSetProperties (xsmp->connection, props->len,
1091                         (SmProp **)props->pdata);
1092     }
1093
1094   for (i = 0; i < props->len; i++)
1095     {
1096       prop = props->pdata[i];
1097       g_free (prop->vals);
1098       g_free (prop);
1099     }
1100   g_ptr_array_free (props, TRUE);
1101 }
1102
1103 /* Takes a NULL-terminated list of property names and deletes them. */
1104 static void
1105 delete_properties (EggSMClientXSMP *xsmp, ...)
1106 {
1107   GPtrArray *props;
1108   char *prop;
1109   va_list ap;
1110
1111   if (!xsmp->connection)
1112     return;
1113
1114   props = g_ptr_array_new ();
1115
1116   va_start (ap, xsmp);
1117   while ((prop = va_arg (ap, char *)))
1118     g_ptr_array_add (props, prop);
1119   va_end (ap);
1120
1121   SmcDeleteProperties (xsmp->connection, props->len,
1122                        (char **)props->pdata);
1123
1124   g_ptr_array_free (props, TRUE);
1125 }
1126
1127 /* Takes an array of strings and creates a LISTofARRAY8 property. The
1128  * strings are neither dupped nor freed; they need to remain valid
1129  * until you're done with the SmProp.
1130  */
1131 static SmProp *
1132 array_prop (const char *name, ...)
1133 {
1134   SmProp *prop;
1135   SmPropValue pv;
1136   GArray *vals;
1137   char *value;
1138   va_list ap;
1139
1140   prop = g_new (SmProp, 1);
1141   prop->name = (char *)name;
1142   prop->type = SmLISTofARRAY8;
1143
1144   vals = g_array_new (FALSE, FALSE, sizeof (SmPropValue));
1145
1146   va_start (ap, name);
1147   while ((value = va_arg (ap, char *)))
1148     {
1149       pv.length = strlen (value);
1150       pv.value = value;
1151       g_array_append_val (vals, pv);
1152     }
1153
1154   prop->num_vals = vals->len;
1155   prop->vals = (SmPropValue *)vals->data;
1156
1157   g_array_free (vals, FALSE);
1158
1159   return prop;
1160 }
1161
1162 /* Takes a GPtrArray of strings and creates a LISTofARRAY8 property.
1163  * The array contents are neither dupped nor freed; they need to
1164  * remain valid until you're done with the SmProp.
1165  */
1166 static SmProp *
1167 ptrarray_prop (const char *name, GPtrArray *values)
1168 {
1169   SmProp *prop;
1170   SmPropValue pv;
1171   GArray *vals;
1172   int i;
1173
1174   prop = g_new (SmProp, 1);
1175   prop->name = (char *)name;
1176   prop->type = SmLISTofARRAY8;
1177
1178   vals = g_array_new (FALSE, FALSE, sizeof (SmPropValue));
1179
1180   for (i = 0; i < values->len; i++)
1181     {
1182       pv.length = strlen (values->pdata[i]);
1183       pv.value = values->pdata[i];
1184       g_array_append_val (vals, pv);
1185     }
1186
1187   prop->num_vals = vals->len;
1188   prop->vals = (SmPropValue *)vals->data;
1189
1190   g_array_free (vals, FALSE);
1191
1192   return prop;
1193 }
1194
1195 /* Takes a string and creates an ARRAY8 property. The string is
1196  * neither dupped nor freed; it needs to remain valid until you're
1197  * done with the SmProp.
1198  */
1199 static SmProp *
1200 string_prop (const char *name, const char *value)
1201 {
1202   SmProp *prop;
1203
1204   prop = g_new (SmProp, 1);
1205   prop->name = (char *)name;
1206   prop->type = SmARRAY8;
1207
1208   prop->num_vals = 1;
1209   prop->vals = g_new (SmPropValue, 1);
1210
1211   prop->vals[0].length = strlen (value);
1212   prop->vals[0].value = (char *)value;
1213
1214   return prop;
1215 }
1216
1217 /* Takes a char and creates a CARD8 property. */
1218 static SmProp *
1219 card8_prop (const char *name, unsigned char value)
1220 {
1221   SmProp *prop;
1222   char *card8val;
1223
1224   /* To avoid having to allocate and free prop->vals[0], we cheat and
1225    * make vals a 2-element-long array and then use the second element
1226    * to store value.
1227    */
1228
1229   prop = g_new (SmProp, 1);
1230   prop->name = (char *)name;
1231   prop->type = SmCARD8;
1232
1233   prop->num_vals = 1;
1234   prop->vals = g_new (SmPropValue, 2);
1235   card8val = (char *)(&prop->vals[1]);
1236   card8val[0] = value;
1237
1238   prop->vals[0].length = 1;
1239   prop->vals[0].value = card8val;
1240
1241   return prop;
1242 }
1243
1244 /* ICE code. This makes no effort to play nice with anyone else trying
1245  * to use libICE. Fortunately, no one uses libICE for anything other
1246  * than SM. (DCOP uses ICE, but it has its own private copy of
1247  * libICE.)
1248  *
1249  * When this moves to gtk, it will need to be cleverer, to avoid
1250  * tripping over old apps that use GnomeClient or that use libSM
1251  * directly.
1252  */
1253
1254 #include <X11/ICE/ICElib.h>
1255 #include <fcntl.h>
1256
1257 static void        ice_error_handler    (IceConn        ice_conn,
1258                                          Bool           swap,
1259                                          int            offending_minor_opcode,
1260                                          unsigned long  offending_sequence,
1261                                          int            error_class,
1262                                          int            severity,
1263                                          IcePointer     values);
1264 static void        ice_io_error_handler (IceConn        ice_conn);
1265 static void        ice_connection_watch (IceConn        ice_conn,
1266                                          IcePointer     client_data,
1267                                          Bool           opening,
1268                                          IcePointer    *watch_data);
1269
1270 static void
1271 ice_init (void)
1272 {
1273   IceSetIOErrorHandler (ice_io_error_handler);
1274   IceSetErrorHandler (ice_error_handler);
1275   IceAddConnectionWatch (ice_connection_watch, NULL);
1276 }
1277
1278 static gboolean
1279 process_ice_messages (IceConn ice_conn)
1280 {
1281   IceProcessMessagesStatus status;
1282
1283   gdk_threads_enter ();
1284   status = IceProcessMessages (ice_conn, NULL, NULL);
1285   gdk_threads_leave ();
1286
1287   switch (status)
1288     {
1289     case IceProcessMessagesSuccess:
1290       return TRUE;
1291
1292     case IceProcessMessagesIOError:
1293       sm_client_xsmp_disconnect (IceGetConnectionContext (ice_conn));
1294       return FALSE;
1295
1296     case IceProcessMessagesConnectionClosed:
1297       return FALSE;
1298
1299     default:
1300       g_assert_not_reached ();
1301     }
1302 }
1303
1304 static gboolean
1305 ice_iochannel_watch (GIOChannel   *channel,
1306                      GIOCondition  condition,
1307                      gpointer      client_data)
1308 {
1309   return process_ice_messages (client_data);
1310 }
1311
1312 static void
1313 ice_connection_watch (IceConn     ice_conn,
1314                       IcePointer  client_data,
1315                       Bool        opening,
1316                       IcePointer *watch_data)
1317 {
1318   guint watch_id;
1319
1320   if (opening)
1321     {
1322       GIOChannel *channel;
1323       int fd = IceConnectionNumber (ice_conn);
1324
1325       fcntl (fd, F_SETFD, fcntl (fd, F_GETFD, 0) | FD_CLOEXEC);
1326       channel = g_io_channel_unix_new (fd);
1327       watch_id = g_io_add_watch (channel, G_IO_IN | G_IO_ERR,
1328                                  ice_iochannel_watch, ice_conn);
1329       g_io_channel_unref (channel);
1330
1331       *watch_data = GUINT_TO_POINTER (watch_id);
1332     }
1333   else
1334     {
1335       watch_id = GPOINTER_TO_UINT (*watch_data);
1336       g_source_remove (watch_id);
1337     }
1338 }
1339
1340 static void
1341 ice_error_handler (IceConn       ice_conn,
1342                    Bool          swap,
1343                    int           offending_minor_opcode,
1344                    unsigned long offending_sequence,
1345                    int           error_class,
1346                    int           severity,
1347                    IcePointer    values)
1348 {
1349   /* Do nothing */
1350 }
1351
1352 static void
1353 ice_io_error_handler (IceConn ice_conn)
1354 {
1355   /* Do nothing */
1356 }
1357
1358 static void
1359 smc_error_handler (SmcConn       smc_conn,
1360                    Bool          swap,
1361                    int           offending_minor_opcode,
1362                    unsigned long offending_sequence,
1363                    int           error_class,
1364                    int           severity,
1365                    SmPointer     values)
1366 {
1367   /* Do nothing */
1368 }