Annotation of src/usr.bin/tmux/session.c, Revision 1.14
1.14 ! nicm 1: /* $OpenBSD: session.c,v 1.13 2009/11/13 14:47:31 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <sys/time.h>
21:
1.6 nicm 22: #include <paths.h>
1.1 nicm 23: #include <string.h>
24: #include <stdlib.h>
25: #include <unistd.h>
1.10 nicm 26: #include <time.h>
1.1 nicm 27:
28: #include "tmux.h"
29:
30: /* Global session list. */
31: struct sessions sessions;
1.7 nicm 32: struct sessions dead_sessions;
1.11 nicm 33: struct session_groups session_groups;
1.1 nicm 34:
35: struct winlink *session_next_activity(struct session *, struct winlink *);
36: struct winlink *session_previous_activity(struct session *, struct winlink *);
37:
38: void
39: session_alert_cancel(struct session *s, struct winlink *wl)
40: {
41: struct session_alert *sa, *sb;
42:
43: sa = SLIST_FIRST(&s->alerts);
44: while (sa != NULL) {
45: sb = sa;
46: sa = SLIST_NEXT(sa, entry);
47:
48: if (wl == NULL || sb->wl == wl) {
49: SLIST_REMOVE(&s->alerts, sb, session_alert, entry);
50: xfree(sb);
51: }
52: }
53: }
54:
55: void
56: session_alert_add(struct session *s, struct window *w, int type)
57: {
58: struct session_alert *sa;
59: struct winlink *wl;
60:
61: RB_FOREACH(wl, winlinks, &s->windows) {
62: if (wl == s->curw)
63: continue;
64:
65: if (wl->window == w &&
66: !session_alert_has(s, wl, type)) {
67: sa = xmalloc(sizeof *sa);
68: sa->wl = wl;
69: sa->type = type;
70: SLIST_INSERT_HEAD(&s->alerts, sa, entry);
71: }
72: }
73: }
74:
75: int
76: session_alert_has(struct session *s, struct winlink *wl, int type)
77: {
78: struct session_alert *sa;
79:
80: SLIST_FOREACH(sa, &s->alerts, entry) {
81: if (sa->wl == wl && sa->type == type)
82: return (1);
83: }
84:
85: return (0);
86: }
87:
88: int
89: session_alert_has_window(struct session *s, struct window *w, int type)
90: {
91: struct session_alert *sa;
92:
93: SLIST_FOREACH(sa, &s->alerts, entry) {
94: if (sa->wl->window == w && sa->type == type)
95: return (1);
96: }
97:
98: return (0);
99: }
100:
101: /* Find session by name. */
102: struct session *
103: session_find(const char *name)
104: {
105: struct session *s;
106: u_int i;
107:
108: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
109: s = ARRAY_ITEM(&sessions, i);
110: if (s != NULL && strcmp(s->name, name) == 0)
111: return (s);
112: }
113:
114: return (NULL);
115: }
116:
117: /* Create a new session. */
118: struct session *
1.3 nicm 119: session_create(const char *name, const char *cmd, const char *cwd,
1.5 nicm 120: struct environ *env, struct termios *tio, int idx, u_int sx, u_int sy,
121: char **cause)
1.1 nicm 122: {
123: struct session *s;
124: u_int i;
125:
126: s = xmalloc(sizeof *s);
1.7 nicm 127: s->references = 0;
1.1 nicm 128: s->flags = 0;
1.7 nicm 129:
1.12 nicm 130: if (gettimeofday(&s->creation_time, NULL) != 0)
1.9 nicm 131: fatal("gettimeofday failed");
1.12 nicm 132: memcpy(&s->activity_time, &s->creation_time, sizeof s->activity_time);
1.7 nicm 133:
1.1 nicm 134: s->curw = NULL;
1.11 nicm 135: TAILQ_INIT(&s->lastw);
1.1 nicm 136: RB_INIT(&s->windows);
137: SLIST_INIT(&s->alerts);
1.7 nicm 138:
1.1 nicm 139: paste_init_stack(&s->buffers);
1.7 nicm 140:
1.2 nicm 141: options_init(&s->options, &global_s_options);
1.3 nicm 142: environ_init(&s->environ);
143: if (env != NULL)
144: environ_copy(env, &s->environ);
1.8 nicm 145:
146: s->tio = NULL;
147: if (tio != NULL) {
148: s->tio = xmalloc(sizeof *s->tio);
149: memcpy(s->tio, tio, sizeof *s->tio);
150: }
1.1 nicm 151:
152: s->sx = sx;
153: s->sy = sy;
154:
155: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
156: if (ARRAY_ITEM(&sessions, i) == NULL) {
157: ARRAY_SET(&sessions, i, s);
158: break;
159: }
160: }
161: if (i == ARRAY_LENGTH(&sessions))
162: ARRAY_ADD(&sessions, s);
163:
164: if (name != NULL)
165: s->name = xstrdup(name);
166: else
167: xasprintf(&s->name, "%u", i);
1.11 nicm 168:
169: if (cmd != NULL) {
170: if (session_new(s, NULL, cmd, cwd, idx, cause) == NULL) {
171: session_destroy(s);
172: return (NULL);
173: }
174: session_select(s, RB_ROOT(&s->windows)->idx);
1.1 nicm 175: }
176:
177: log_debug("session %s created", s->name);
178:
179: return (s);
180: }
181:
182: /* Destroy a session. */
183: void
184: session_destroy(struct session *s)
185: {
186: u_int i;
187:
188: log_debug("session %s destroyed", s->name);
189:
190: if (session_index(s, &i) != 0)
191: fatalx("session not found");
192: ARRAY_SET(&sessions, i, NULL);
193: while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
194: ARRAY_TRUNC(&sessions, 1);
195:
1.8 nicm 196: if (s->tio != NULL)
197: xfree(s->tio);
198:
1.11 nicm 199: session_group_remove(s);
1.1 nicm 200: session_alert_cancel(s, NULL);
1.3 nicm 201: environ_free(&s->environ);
1.1 nicm 202: options_free(&s->options);
203: paste_free_stack(&s->buffers);
204:
1.11 nicm 205: while (!TAILQ_EMPTY(&s->lastw))
206: winlink_stack_remove(&s->lastw, TAILQ_FIRST(&s->lastw));
1.1 nicm 207: while (!RB_EMPTY(&s->windows))
208: winlink_remove(&s->windows, RB_ROOT(&s->windows));
209:
210: xfree(s->name);
1.7 nicm 211:
212: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
213: if (ARRAY_ITEM(&dead_sessions, i) == NULL) {
214: ARRAY_SET(&dead_sessions, i, s);
215: break;
216: }
217: }
218: if (i == ARRAY_LENGTH(&dead_sessions))
219: ARRAY_ADD(&dead_sessions, s);
220: s->flags |= SESSION_DEAD;
1.1 nicm 221: }
222:
223: /* Find session index. */
224: int
225: session_index(struct session *s, u_int *i)
226: {
227: for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
228: if (s == ARRAY_ITEM(&sessions, *i))
229: return (0);
230: }
231: return (-1);
232: }
233:
234: /* Create a new window on a session. */
235: struct winlink *
1.4 nicm 236: session_new(struct session *s,
1.1 nicm 237: const char *name, const char *cmd, const char *cwd, int idx, char **cause)
238: {
239: struct window *w;
1.3 nicm 240: struct environ env;
1.6 nicm 241: const char *shell;
1.1 nicm 242: u_int hlimit;
243:
1.3 nicm 244: environ_init(&env);
245: environ_copy(&global_environ, &env);
246: environ_copy(&s->environ, &env);
247: server_fill_environ(s, &env);
1.1 nicm 248:
1.6 nicm 249: shell = options_get_string(&s->options, "default-shell");
250: if (*shell == '\0' || areshell(shell))
251: shell = _PATH_BSHELL;
252:
1.1 nicm 253: hlimit = options_get_number(&s->options, "history-limit");
1.4 nicm 254: w = window_create(
1.8 nicm 255: name, cmd, shell, cwd, &env, s->tio, s->sx, s->sy, hlimit, cause);
1.3 nicm 256: if (w == NULL) {
257: environ_free(&env);
1.1 nicm 258: return (NULL);
1.3 nicm 259: }
260: environ_free(&env);
1.1 nicm 261:
262: if (options_get_number(&s->options, "set-remain-on-exit"))
263: options_set_number(&w->options, "remain-on-exit", 1);
264:
265: return (session_attach(s, w, idx, cause));
266: }
267:
268: /* Attach a window to a session. */
269: struct winlink *
270: session_attach(struct session *s, struct window *w, int idx, char **cause)
271: {
272: struct winlink *wl;
273:
274: if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
275: xasprintf(cause, "index in use: %d", idx);
1.11 nicm 276: session_group_synchronize_from(s);
1.1 nicm 277: return (wl);
278: }
279:
280: /* Detach a window from a session. */
281: int
282: session_detach(struct session *s, struct winlink *wl)
283: {
284: if (s->curw == wl &&
285: session_last(s) != 0 && session_previous(s, 0) != 0)
286: session_next(s, 0);
287:
288: session_alert_cancel(s, wl);
289: winlink_stack_remove(&s->lastw, wl);
290: winlink_remove(&s->windows, wl);
1.11 nicm 291: session_group_synchronize_from(s);
1.1 nicm 292: if (RB_EMPTY(&s->windows)) {
293: session_destroy(s);
294: return (1);
295: }
296: return (0);
297: }
298:
299: /* Return if session has window. */
300: int
301: session_has(struct session *s, struct window *w)
302: {
303: struct winlink *wl;
304:
305: RB_FOREACH(wl, winlinks, &s->windows) {
306: if (wl->window == w)
307: return (1);
308: }
309: return (0);
310: }
311:
312: struct winlink *
313: session_next_activity(struct session *s, struct winlink *wl)
314: {
315: while (wl != NULL) {
316: if (session_alert_has(s, wl, WINDOW_BELL))
317: break;
318: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
319: break;
320: if (session_alert_has(s, wl, WINDOW_CONTENT))
321: break;
1.14 ! nicm 322: wl = winlink_next(wl);
1.1 nicm 323: }
324: return (wl);
325: }
326:
327: /* Move session to next window. */
328: int
329: session_next(struct session *s, int activity)
330: {
331: struct winlink *wl;
332:
333: if (s->curw == NULL)
334: return (-1);
335:
1.14 ! nicm 336: wl = winlink_next(s->curw);
1.1 nicm 337: if (activity)
338: wl = session_next_activity(s, wl);
339: if (wl == NULL) {
340: wl = RB_MIN(winlinks, &s->windows);
341: if (activity && ((wl = session_next_activity(s, wl)) == NULL))
342: return (-1);
343: }
344: if (wl == s->curw)
345: return (1);
346: winlink_stack_remove(&s->lastw, wl);
347: winlink_stack_push(&s->lastw, s->curw);
348: s->curw = wl;
349: session_alert_cancel(s, wl);
350: return (0);
351: }
352:
353: struct winlink *
354: session_previous_activity(struct session *s, struct winlink *wl)
355: {
356: while (wl != NULL) {
357: if (session_alert_has(s, wl, WINDOW_BELL))
358: break;
359: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
360: break;
361: if (session_alert_has(s, wl, WINDOW_CONTENT))
362: break;
1.14 ! nicm 363: wl = winlink_previous(wl);
1.1 nicm 364: }
365: return (wl);
366: }
367:
368: /* Move session to previous window. */
369: int
370: session_previous(struct session *s, int activity)
371: {
372: struct winlink *wl;
373:
374: if (s->curw == NULL)
375: return (-1);
376:
1.14 ! nicm 377: wl = winlink_previous(s->curw);
1.1 nicm 378: if (activity)
379: wl = session_previous_activity(s, wl);
380: if (wl == NULL) {
381: wl = RB_MAX(winlinks, &s->windows);
382: if (activity && (wl = session_previous_activity(s, wl)) == NULL)
383: return (-1);
384: }
385: if (wl == s->curw)
386: return (1);
387: winlink_stack_remove(&s->lastw, wl);
388: winlink_stack_push(&s->lastw, s->curw);
389: s->curw = wl;
390: session_alert_cancel(s, wl);
391: return (0);
392: }
393:
394: /* Move session to specific window. */
395: int
396: session_select(struct session *s, int idx)
397: {
398: struct winlink *wl;
399:
400: wl = winlink_find_by_index(&s->windows, idx);
401: if (wl == NULL)
402: return (-1);
403: if (wl == s->curw)
404: return (1);
405: winlink_stack_remove(&s->lastw, wl);
406: winlink_stack_push(&s->lastw, s->curw);
407: s->curw = wl;
408: session_alert_cancel(s, wl);
409: return (0);
410: }
411:
412: /* Move session to last used window. */
413: int
414: session_last(struct session *s)
415: {
416: struct winlink *wl;
417:
1.11 nicm 418: wl = TAILQ_FIRST(&s->lastw);
1.1 nicm 419: if (wl == NULL)
420: return (-1);
421: if (wl == s->curw)
422: return (1);
423:
424: winlink_stack_remove(&s->lastw, wl);
425: winlink_stack_push(&s->lastw, s->curw);
426: s->curw = wl;
427: session_alert_cancel(s, wl);
428: return (0);
1.11 nicm 429: }
430:
431: /* Find the session group containing a session. */
432: struct session_group *
433: session_group_find(struct session *target)
434: {
435: struct session_group *sg;
436: struct session *s;
437:
438: TAILQ_FOREACH(sg, &session_groups, entry) {
439: TAILQ_FOREACH(s, &sg->sessions, gentry) {
440: if (s == target)
441: return (sg);
442: }
443: }
444: return (NULL);
445: }
446:
447: /* Find session group index. */
448: u_int
449: session_group_index(struct session_group *sg)
450: {
451: struct session_group *sg2;
452: u_int i;
453:
454: i = 0;
455: TAILQ_FOREACH(sg2, &session_groups, entry) {
456: if (sg == sg2)
457: return (i);
458: i++;
459: }
460:
461: fatalx("session group not found");
462: }
463:
464: /*
465: * Add a session to the session group containing target, creating it if
466: * necessary.
467: */
468: void
469: session_group_add(struct session *target, struct session *s)
470: {
471: struct session_group *sg;
472:
473: if ((sg = session_group_find(target)) == NULL) {
474: sg = xmalloc(sizeof *sg);
475: TAILQ_INSERT_TAIL(&session_groups, sg, entry);
476: TAILQ_INIT(&sg->sessions);
477: TAILQ_INSERT_TAIL(&sg->sessions, target, gentry);
478: }
479: TAILQ_INSERT_TAIL(&sg->sessions, s, gentry);
480: }
481:
482: /* Remove a session from its group and destroy the group if empty. */
483: void
484: session_group_remove(struct session *s)
485: {
486: struct session_group *sg;
487:
488: if ((sg = session_group_find(s)) == NULL)
489: return;
490: TAILQ_REMOVE(&sg->sessions, s, gentry);
491: if (TAILQ_NEXT(TAILQ_FIRST(&sg->sessions), gentry) == NULL)
492: TAILQ_REMOVE(&sg->sessions, TAILQ_FIRST(&sg->sessions), gentry);
493: if (TAILQ_EMPTY(&sg->sessions)) {
494: TAILQ_REMOVE(&session_groups, sg, entry);
495: xfree(sg);
496: }
497: }
498:
499: /* Synchronize a session to its session group. */
500: void
501: session_group_synchronize_to(struct session *s)
502: {
503: struct session_group *sg;
504: struct session *target;
505:
506: if ((sg = session_group_find(s)) == NULL)
507: return;
508:
509: target = NULL;
510: TAILQ_FOREACH(target, &sg->sessions, gentry) {
511: if (target != s)
512: break;
513: }
514: session_group_synchronize1(target, s);
515: }
516:
517: /* Synchronize a session group to a session. */
518: void
519: session_group_synchronize_from(struct session *target)
520: {
521: struct session_group *sg;
522: struct session *s;
523:
524: if ((sg = session_group_find(target)) == NULL)
525: return;
526:
527: TAILQ_FOREACH(s, &sg->sessions, gentry) {
528: if (s != target)
529: session_group_synchronize1(target, s);
530: }
531: }
532:
533: /*
534: * Synchronize a session with a target session. This means destroying all
535: * winlinks then recreating them, then updating the current window, last window
536: * stack and alerts.
537: */
538: void
539: session_group_synchronize1(struct session *target, struct session *s)
540: {
541: struct winlinks old_windows, *ww;
542: struct winlink_stack old_lastw;
543: struct winlink *wl, *wl2;
544: struct session_alert *sa;
545:
546: /* Don't do anything if the session is empty (it'll be destroyed). */
547: ww = &target->windows;
548: if (RB_EMPTY(ww))
549: return;
550:
551: /* If the current window has vanished, move to the next now. */
552: if (s->curw != NULL) {
553: while (winlink_find_by_index(ww, s->curw->idx) == NULL)
554: session_next(s, 0);
555: }
556:
557: /* Save the old pointer and reset it. */
558: memcpy(&old_windows, &s->windows, sizeof old_windows);
559: RB_INIT(&s->windows);
560:
561: /* Link all the windows from the target. */
562: RB_FOREACH(wl, winlinks, ww)
563: winlink_add(&s->windows, wl->window, wl->idx);
564:
565: /* Fix up the current window. */
566: if (s->curw != NULL)
567: s->curw = winlink_find_by_index(&s->windows, s->curw->idx);
568: else
569: s->curw = winlink_find_by_index(&s->windows, target->curw->idx);
570:
571: /* Fix up the last window stack. */
572: memcpy(&old_lastw, &s->lastw, sizeof old_lastw);
573: TAILQ_INIT(&s->lastw);
574: TAILQ_FOREACH(wl, &old_lastw, sentry) {
575: wl2 = winlink_find_by_index(&s->windows, wl->idx);
576: if (wl2 != NULL)
577: TAILQ_INSERT_TAIL(&s->lastw, wl2, sentry);
578: }
579:
580: /* And update the alerts list. */
581: SLIST_FOREACH(sa, &s->alerts, entry) {
582: wl = winlink_find_by_index(&s->windows, sa->wl->idx);
583: if (wl == NULL)
584: session_alert_cancel(s, sa->wl);
585: else
586: sa->wl = wl;
587: }
588:
589: /* Then free the old winlinks list. */
590: while (!RB_EMPTY(&old_windows)) {
591: wl = RB_ROOT(&old_windows);
1.13 nicm 592: winlink_remove(&old_windows, wl);
1.11 nicm 593: }
1.1 nicm 594: }
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