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afb4ecad JD |
1 | /* Session management module for systems which understand the X Session |
2 | management protocol. | |
f25dcaa0 | 3 | Copyright (C) 2002 Free Software Foundation, Inc. |
afb4ecad JD |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <config.h> | |
23 | ||
24 | #ifdef HAVE_X_SM | |
25 | ||
26 | #include <X11/SM/SMlib.h> | |
27 | #ifdef HAVE_STRING_H | |
28 | #include <string.h> | |
29 | #else | |
30 | #ifdef HAVE_STRINGS_H | |
31 | #include <strings.h> | |
32 | #endif | |
33 | #endif | |
34 | ||
35 | #ifdef HAVE_UNISTD_H | |
36 | #include <unistd.h> | |
37 | #endif | |
38 | #ifdef HAVE_STDLIB_H | |
39 | #include <stdlib.h> | |
40 | #endif | |
41 | ||
42 | #include <sys/param.h> | |
656132eb | 43 | #include <stdio.h> |
afb4ecad JD |
44 | |
45 | #include "systime.h" | |
46 | #include "sysselect.h" | |
47 | #include "lisp.h" | |
48 | #include "termhooks.h" | |
656132eb | 49 | #include "termopts.h" |
afb4ecad JD |
50 | |
51 | #ifndef MAXPATHLEN | |
52 | #define MAXPATHLEN 1024 | |
53 | #endif /* not MAXPATHLEN */ | |
54 | ||
55 | ||
56 | /* The user login name. */ | |
57 | ||
58 | extern Lisp_Object Vuser_login_name; | |
59 | ||
3b8f9651 | 60 | /* This is the event used when SAVE_SESSION_EVENT occurs. */ |
afb4ecad JD |
61 | |
62 | static struct input_event emacs_event; | |
63 | ||
3b8f9651 | 64 | /* The descriptor that we use to check for data from the session manager. */ |
afb4ecad JD |
65 | |
66 | static int ice_fd = -1; | |
67 | ||
3b8f9651 | 68 | /* A flag that says if we are in shutdown interactions or not. */ |
afb4ecad JD |
69 | |
70 | static int doing_interact = False; | |
71 | ||
72 | /* The session manager object for the session manager connection */ | |
73 | ||
74 | static SmcConn smc_conn; | |
75 | ||
76 | /* The client session id for this session */ | |
77 | static char *client_id; | |
78 | ||
79 | /* The full path name to the Emacs program */ | |
80 | static char *emacs_program; | |
81 | ||
82 | /* The client session id for this session as a lisp object. */ | |
83 | ||
84 | Lisp_Object Vx_session_id; | |
85 | ||
86 | /* The id we had the previous session. This is only available if we | |
87 | have been started by the session manager with SMID_OPT. */ | |
88 | ||
89 | Lisp_Object Vx_session_previous_id; | |
90 | ||
91 | /* The option we tell the session manager to start Emacs with when | |
92 | restarting Emacs. The client_id is appended. */ | |
93 | ||
94 | #define SMID_OPT "--smid=" | |
95 | ||
96 | ||
ca2417b9 JD |
97 | /* The option to start Emacs without the splash screen when |
98 | restarting Emacs. */ | |
99 | ||
100 | #define NOSPLASH_OPT "--no-splash" | |
101 | ||
102 | ||
afb4ecad JD |
103 | /* Handle any messages from the session manager. If no connection is |
104 | open to a session manager, just return 0. | |
105 | Otherwise returns the number of events stored in buffer BUFP, | |
106 | which can hold up to *NUMCHARS characters. At most one event is | |
7d0393cf | 107 | stored, a SAVE_SESSION_EVENT. */ |
afb4ecad JD |
108 | int |
109 | x_session_check_input (bufp, numchars) | |
110 | struct input_event *bufp; | |
111 | int *numchars; | |
112 | { | |
113 | SELECT_TYPE read_fds; | |
114 | EMACS_TIME tmout; | |
7d0393cf | 115 | |
afb4ecad | 116 | if (ice_fd == -1) return 0; |
7d0393cf | 117 | |
afb4ecad JD |
118 | FD_ZERO (&read_fds); |
119 | FD_SET (ice_fd, &read_fds); | |
7d0393cf | 120 | |
afb4ecad JD |
121 | tmout.tv_sec = 0; |
122 | tmout.tv_usec = 0; | |
7d0393cf | 123 | |
afb4ecad JD |
124 | /* Reset this so wo can check kind after callbacks have been called by |
125 | IceProcessMessages. The smc_interact_CB sets the kind to | |
3b8f9651 | 126 | SAVE_SESSION_EVENT, but we don't know beforehand if that callback |
afb4ecad | 127 | will be called. */ |
3b8f9651 | 128 | emacs_event.kind = NO_EVENT; |
afb4ecad JD |
129 | |
130 | if (select (ice_fd+1, &read_fds, | |
131 | (SELECT_TYPE *)0, (SELECT_TYPE *)0, &tmout) < 0) | |
132 | { | |
133 | ice_fd = -1; | |
134 | return 0; | |
135 | } | |
7d0393cf | 136 | |
afb4ecad JD |
137 | |
138 | if (FD_ISSET (ice_fd, &read_fds)) | |
139 | IceProcessMessages (SmcGetIceConnection (smc_conn), | |
140 | (IceReplyWaitInfo *)0, (Bool *)0); | |
141 | ||
7d0393cf | 142 | |
afb4ecad | 143 | /* Check if smc_interact_CB was called and we shall generate a |
3b8f9651 PJ |
144 | SAVE_SESSION_EVENT. */ |
145 | if (*numchars > 0 && emacs_event.kind != NO_EVENT) | |
afb4ecad JD |
146 | { |
147 | bcopy (&emacs_event, bufp, sizeof (struct input_event)); | |
148 | bufp++; | |
149 | (*numchars)--; | |
150 | ||
151 | return 1; | |
152 | } | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | /* Return non-zero if we have a connection to a session manager.*/ | |
158 | int | |
159 | x_session_have_connection () | |
160 | { | |
161 | return ice_fd != -1; | |
162 | } | |
163 | ||
164 | /* This is called when the session manager says it is OK to interact with the | |
3b8f9651 | 165 | user. Here we set the kind to SAVE_SESSION_EVENT so an event is generated. |
afb4ecad JD |
166 | Then lisp code can interact with the user. */ |
167 | static void | |
168 | smc_interact_CB (smcConn, clientData) | |
169 | SmcConn smcConn; | |
170 | SmPointer clientData; | |
171 | { | |
172 | doing_interact = True; | |
3b8f9651 | 173 | emacs_event.kind = SAVE_SESSION_EVENT; |
afb4ecad JD |
174 | } |
175 | ||
f25dcaa0 | 176 | /* This is called when the session manager tells us to save ourselves. |
afb4ecad JD |
177 | We set the required properties so the session manager can restart us, |
178 | plus the current working directory property (not mandatory) so we | |
179 | are started in the correct directory. | |
180 | ||
181 | If this is a shutdown and we can request to interact with the user, | |
182 | we do so, because we don't know what the lisp code might do. */ | |
183 | static void | |
184 | smc_save_yourself_CB (smcConn, | |
185 | clientData, | |
186 | saveType, | |
187 | shutdown, | |
188 | interactStyle, | |
189 | fast) | |
190 | SmcConn smcConn; | |
191 | SmPointer clientData; | |
192 | int saveType; | |
193 | Bool shutdown; | |
194 | int interactStyle; | |
195 | Bool fast; | |
196 | { | |
197 | #define NR_PROPS 5 | |
7d0393cf | 198 | |
afb4ecad JD |
199 | SmProp *props[NR_PROPS]; |
200 | SmProp prop_ptr[NR_PROPS]; | |
7d0393cf | 201 | |
afb4ecad JD |
202 | SmPropValue values[20]; |
203 | int val_idx = 0; | |
204 | int props_idx = 0; | |
7d0393cf | 205 | |
afb4ecad JD |
206 | char cwd[MAXPATHLEN+1]; |
207 | char *smid_opt; | |
208 | ||
209 | /* How to start a new instance of Emacs */ | |
210 | props[props_idx] = &prop_ptr[props_idx]; | |
211 | props[props_idx]->name = SmCloneCommand; | |
212 | props[props_idx]->type = SmLISTofARRAY8; | |
213 | props[props_idx]->num_vals = 1; | |
214 | props[props_idx]->vals = &values[val_idx++]; | |
215 | props[props_idx]->vals[0].length = strlen (emacs_program); | |
216 | props[props_idx]->vals[0].value = emacs_program; | |
217 | ++props_idx; | |
218 | ||
219 | /* The name of the program */ | |
220 | props[props_idx] = &prop_ptr[props_idx]; | |
221 | props[props_idx]->name = SmProgram; | |
222 | props[props_idx]->type = SmARRAY8; | |
223 | props[props_idx]->num_vals = 1; | |
224 | props[props_idx]->vals = &values[val_idx++]; | |
d5db4077 KR |
225 | props[props_idx]->vals[0].length = strlen (SDATA (Vinvocation_name)); |
226 | props[props_idx]->vals[0].value = SDATA (Vinvocation_name); | |
afb4ecad | 227 | ++props_idx; |
7d0393cf | 228 | |
ca2417b9 | 229 | /* How to restart Emacs (i.e.: /path/to/emacs --smid=xxxx --no-splash). */ |
afb4ecad JD |
230 | props[props_idx] = &prop_ptr[props_idx]; |
231 | props[props_idx]->name = SmRestartCommand; | |
232 | props[props_idx]->type = SmLISTofARRAY8; | |
ca2417b9 | 233 | props[props_idx]->num_vals = 3; /* /path/to/emacs, --smid=xxx --no-splash */ |
afb4ecad JD |
234 | props[props_idx]->vals = &values[val_idx]; |
235 | props[props_idx]->vals[0].length = strlen (emacs_program); | |
236 | props[props_idx]->vals[0].value = emacs_program; | |
237 | ||
238 | smid_opt = xmalloc (strlen (SMID_OPT) + strlen (client_id) + 1); | |
239 | strcpy (smid_opt, SMID_OPT); | |
240 | strcat (smid_opt, client_id); | |
7d0393cf | 241 | |
afb4ecad JD |
242 | props[props_idx]->vals[1].length = strlen (smid_opt); |
243 | props[props_idx]->vals[1].value = smid_opt; | |
ca2417b9 JD |
244 | |
245 | props[props_idx]->vals[2].length = strlen (NOSPLASH_OPT); | |
246 | props[props_idx]->vals[2].value = NOSPLASH_OPT; | |
247 | val_idx += 3; | |
afb4ecad JD |
248 | ++props_idx; |
249 | ||
250 | /* User id */ | |
251 | props[props_idx] = &prop_ptr[props_idx]; | |
252 | props[props_idx]->name = SmUserID; | |
253 | props[props_idx]->type = SmARRAY8; | |
254 | props[props_idx]->num_vals = 1; | |
255 | props[props_idx]->vals = &values[val_idx++]; | |
d5db4077 KR |
256 | props[props_idx]->vals[0].length = strlen (SDATA (Vuser_login_name)); |
257 | props[props_idx]->vals[0].value = SDATA (Vuser_login_name); | |
afb4ecad JD |
258 | ++props_idx; |
259 | ||
260 | /* The current directory property, not mandatory */ | |
261 | #ifdef HAVE_GETCWD | |
262 | if (getcwd (cwd, MAXPATHLEN+1) != 0) | |
263 | #else | |
264 | if (getwd (cwd) != 0) | |
265 | #endif | |
266 | { | |
267 | props[props_idx] = &prop_ptr[props_idx]; | |
268 | props[props_idx]->name = SmCurrentDirectory; | |
269 | props[props_idx]->type = SmARRAY8; | |
270 | props[props_idx]->num_vals = 1; | |
271 | props[props_idx]->vals = &values[val_idx++]; | |
272 | props[props_idx]->vals[0].length = strlen (cwd); | |
273 | props[props_idx]->vals[0].value = cwd; | |
274 | ++props_idx; | |
275 | } | |
7d0393cf JB |
276 | |
277 | ||
afb4ecad JD |
278 | SmcSetProperties (smcConn, props_idx, props); |
279 | ||
280 | xfree (smid_opt); | |
281 | ||
282 | /* See if we maybe shall interact with the user. */ | |
283 | if (interactStyle != SmInteractStyleAny | |
284 | || ! shutdown | |
285 | || saveType == SmSaveLocal | |
286 | || ! SmcInteractRequest (smcConn, SmDialogNormal, smc_interact_CB, 0)) | |
287 | { | |
288 | /* No interaction, we are done saving ourself. */ | |
289 | SmcSaveYourselfDone (smcConn, True); | |
290 | } | |
291 | } | |
292 | ||
293 | /* According to the SM specification, this shall close the connection */ | |
294 | static void | |
295 | smc_die_CB (smcConn, clientData) | |
296 | SmcConn smcConn; | |
297 | SmPointer clientData; | |
298 | { | |
299 | SmcCloseConnection (smcConn, 0, 0); | |
300 | ice_fd = -1; | |
301 | } | |
302 | ||
303 | /* We don't use the next two but they are mandatory, leave them empty. | |
304 | According to the SM specification, we should not interact with the | |
305 | user between smc_save_yourself_CB is called and until smc_save_complete_CB | |
306 | is called. It seems like a lot of job to implement this and it doesn't | |
307 | even seem necessary. */ | |
308 | static void | |
309 | smc_save_complete_CB (smcConn, clientData) | |
310 | SmcConn smcConn; | |
311 | SmPointer clientData; | |
312 | { | |
313 | /* Empty */ | |
314 | } | |
315 | ||
316 | static void | |
317 | smc_shutdown_cancelled_CB (smcConn, clientData) | |
318 | SmcConn smcConn; | |
319 | SmPointer clientData; | |
320 | { | |
321 | /* Empty */ | |
322 | } | |
323 | ||
f25dcaa0 | 324 | /* Error handlers for SM and ICE. We don't want to exit Emacs just |
afb4ecad JD |
325 | because there is some error in the session management. */ |
326 | static void | |
327 | smc_error_handler (smcConn, | |
328 | swap, | |
329 | offendingMinorOpcode, | |
330 | offendingSequence, | |
331 | errorClass, | |
332 | severity, | |
333 | values) | |
334 | SmcConn smcConn; | |
335 | Bool swap; | |
336 | int offendingMinorOpcode; | |
337 | unsigned long offendingSequence; | |
338 | int errorClass; | |
339 | int severity; | |
340 | SmPointer values; | |
341 | { | |
342 | /* Empty */ | |
343 | } | |
344 | ||
345 | static void | |
346 | ice_error_handler (iceConn, | |
347 | swap, | |
348 | offendingMinorOpcode, | |
349 | offendingSequence, | |
350 | errorClass, | |
351 | severity, | |
352 | values) | |
353 | IceConn iceConn; | |
354 | Bool swap; | |
355 | int offendingMinorOpcode; | |
356 | unsigned long offendingSequence; | |
357 | int errorClass; | |
358 | int severity; | |
359 | IcePointer values; | |
360 | { | |
361 | /* Empty */ | |
362 | } | |
363 | ||
364 | ||
365 | static void | |
366 | ice_io_error_handler (iceConn) | |
367 | IceConn iceConn; | |
368 | { | |
369 | /* Connection probably gone. */ | |
370 | ice_fd = -1; | |
371 | } | |
372 | ||
373 | /* This is called when the ICE connection is created or closed. The SM library | |
374 | uses ICE as it transport protocol. */ | |
375 | static void | |
376 | ice_conn_watch_CB (iceConn, clientData, opening, watchData) | |
377 | IceConn iceConn; | |
378 | IcePointer clientData; | |
379 | Bool opening; | |
380 | IcePointer *watchData; | |
381 | { | |
382 | if (! opening) | |
383 | { | |
384 | ice_fd = -1; | |
385 | return; | |
386 | } | |
7d0393cf | 387 | |
afb4ecad JD |
388 | ice_fd = IceConnectionNumber (iceConn); |
389 | #ifndef F_SETOWN_BUG | |
390 | #ifdef F_SETOWN | |
391 | #ifdef F_SETOWN_SOCK_NEG | |
392 | /* stdin is a socket here */ | |
393 | fcntl (ice_fd, F_SETOWN, -getpid ()); | |
394 | #else /* ! defined (F_SETOWN_SOCK_NEG) */ | |
395 | fcntl (ice_fd, F_SETOWN, getpid ()); | |
396 | #endif /* ! defined (F_SETOWN_SOCK_NEG) */ | |
397 | #endif /* ! defined (F_SETOWN) */ | |
398 | #endif /* F_SETOWN_BUG */ | |
399 | ||
400 | #ifdef SIGIO | |
401 | if (interrupt_input) | |
402 | init_sigio (ice_fd); | |
403 | #endif /* ! defined (SIGIO) */ | |
404 | } | |
405 | ||
406 | /* Try to open a connection to the session manager. */ | |
407 | void | |
408 | x_session_initialize () | |
409 | { | |
410 | #define SM_ERRORSTRING_LEN 512 | |
411 | char errorstring[SM_ERRORSTRING_LEN]; | |
412 | char* previous_id = NULL; | |
413 | SmcCallbacks callbacks; | |
414 | int name_len = 0; | |
7d0393cf | 415 | |
afb4ecad JD |
416 | /* Check if we where started by the session manager. If so, we will |
417 | have a previous id. */ | |
418 | if (! EQ (Vx_session_previous_id, Qnil) && STRINGP (Vx_session_previous_id)) | |
d5db4077 | 419 | previous_id = SDATA (Vx_session_previous_id); |
afb4ecad JD |
420 | |
421 | /* Construct the path to the Emacs program. */ | |
422 | if (! EQ (Vinvocation_directory, Qnil)) | |
d5db4077 KR |
423 | name_len += strlen (SDATA (Vinvocation_directory)); |
424 | name_len += strlen (SDATA (Vinvocation_name)); | |
afb4ecad JD |
425 | |
426 | /* This malloc will not be freed, but it is only done once, and hopefully | |
427 | not very large */ | |
428 | emacs_program = xmalloc (name_len + 1); | |
429 | emacs_program[0] = '\0'; | |
430 | ||
431 | if (! EQ (Vinvocation_directory, Qnil)) | |
d5db4077 KR |
432 | strcpy (emacs_program, SDATA (Vinvocation_directory)); |
433 | strcat (emacs_program, SDATA (Vinvocation_name)); | |
7d0393cf | 434 | |
afb4ecad JD |
435 | /* The SM protocol says all callbacks are mandatory, so set up all |
436 | here and in the mask passed to SmcOpenConnection */ | |
437 | callbacks.save_yourself.callback = smc_save_yourself_CB; | |
438 | callbacks.save_yourself.client_data = 0; | |
439 | callbacks.die.callback = smc_die_CB; | |
440 | callbacks.die.client_data = 0; | |
441 | callbacks.save_complete.callback = smc_save_complete_CB; | |
442 | callbacks.save_complete.client_data = 0; | |
443 | callbacks.shutdown_cancelled.callback = smc_shutdown_cancelled_CB; | |
444 | callbacks.shutdown_cancelled.client_data = 0; | |
445 | ||
446 | /* Set error handlers. */ | |
447 | SmcSetErrorHandler (smc_error_handler); | |
448 | IceSetErrorHandler (ice_error_handler); | |
449 | IceSetIOErrorHandler (ice_io_error_handler); | |
450 | ||
451 | /* Install callback for when connection status changes. */ | |
452 | IceAddConnectionWatch (ice_conn_watch_CB, 0); | |
453 | ||
454 | /* Open the connection to the session manager. A failure is not | |
f25dcaa0 | 455 | critical, it usually means that no session manager is running. |
afb4ecad JD |
456 | The errorstring is here for debugging. */ |
457 | smc_conn = SmcOpenConnection (NULL, NULL, 1, 0, | |
458 | (SmcSaveYourselfProcMask| | |
459 | SmcDieProcMask| | |
460 | SmcSaveCompleteProcMask| | |
461 | SmcShutdownCancelledProcMask), | |
462 | &callbacks, | |
463 | previous_id, | |
464 | &client_id, | |
465 | SM_ERRORSTRING_LEN, | |
466 | errorstring); | |
467 | ||
468 | if (smc_conn != 0) | |
469 | Vx_session_id = make_string (client_id, strlen (client_id)); | |
470 | } | |
471 | ||
472 | ||
473 | DEFUN ("handle-save-session", Fhandle_save_session, | |
474 | Shandle_save_session, 1, 1, "e", | |
475 | doc: /* Handle the save_yourself event from a session manager. | |
7d0393cf | 476 | A session manager can tell Emacs that the window system is shutting down |
afb4ecad JD |
477 | by sending Emacs a save_yourself message. Emacs executes this function when |
478 | such an event occurs. This function then executes `emacs-session-save'. | |
479 | After that, this function informs the session manager that it can continue | |
480 | or abort shutting down the window system depending on the return value | |
481 | from `emacs-session-save' If the return value is non-nil the session manager | |
482 | is told to abort the window system shutdown. | |
483 | ||
484 | Do not call this function yourself. */) | |
485 | (event) | |
486 | Lisp_Object event; | |
487 | { | |
488 | /* Check doing_interact so that we don't do anything if someone called | |
489 | this at the wrong time. */ | |
490 | if (doing_interact) | |
491 | { | |
492 | Bool cancel_shutdown = False; | |
493 | ||
494 | cancel_shutdown = ! EQ (call0 (intern ("emacs-session-save")), Qnil); | |
495 | ||
496 | SmcInteractDone (smc_conn, cancel_shutdown); | |
497 | SmcSaveYourselfDone (smc_conn, True); | |
498 | ||
499 | doing_interact = False; | |
500 | } | |
ad4ace7a JD |
501 | |
502 | return Qnil; | |
afb4ecad JD |
503 | } |
504 | ||
505 | \f | |
506 | /*********************************************************************** | |
507 | Initialization | |
508 | ***********************************************************************/ | |
509 | void | |
510 | syms_of_xsmfns () | |
511 | { | |
512 | DEFVAR_LISP ("x-session-id", &Vx_session_id, | |
513 | doc: /* The session id Emacs got from the session manager for this session. | |
514 | Changing the value does not change the session id used by Emacs. | |
515 | The value is nil if no session manager is running. | |
516 | See also `x-session-previous-id', `emacs-save-session-functions', | |
517 | `emacs-session-save' and `emacs-session-restore'." */); | |
518 | Vx_session_id = Qnil; | |
519 | ||
520 | DEFVAR_LISP ("x-session-previous-id", &Vx_session_previous_id, | |
521 | doc: /* The previous session id Emacs got from session manager. | |
7d0393cf JB |
522 | If Emacs is running on a window system that has a session manager, the |
523 | session manager gives Emacs a session id. It is feasible for Emacs lisp | |
524 | code to use the session id to save configuration in, for example, a file | |
525 | with a file name based on the session id. If Emacs is running when the | |
526 | window system is shut down, the session manager remembers that Emacs was | |
afb4ecad JD |
527 | running and saves the session id Emacs had. |
528 | ||
7d0393cf JB |
529 | When the window system is started again, the session manager restarts |
530 | Emacs and hands Emacs the session id it had the last time it was | |
531 | running. This is now the previous session id and the value of this | |
532 | variable. If configuration was saved in a file as stated above, the | |
afb4ecad JD |
533 | previous session id shall be used to reconstruct the file name. |
534 | ||
7d0393cf | 535 | The session id Emacs has while it is running is in the variable |
afb4ecad JD |
536 | `x-session-id'. The value of this variable and `x-session-id' may be the |
537 | same, depending on how the session manager works. | |
538 | ||
539 | See also `emacs-save-session-functions', `emacs-session-save' and | |
540 | `emacs-session-restore'." */); | |
541 | Vx_session_previous_id = Qnil; | |
7d0393cf | 542 | |
afb4ecad JD |
543 | defsubr (&Shandle_save_session); |
544 | } | |
545 | ||
546 | #endif /* HAVE_X_SM */ |