Annotation of src/usr.bin/tmux/session.c, Revision 1.18
1.18 ! nicm 1: /* $OpenBSD: session.c,v 1.17 2010/06/21 00:25:32 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:
1.18 ! nicm 35: struct winlink *session_next_alert(struct winlink *);
! 36: struct winlink *session_previous_alert(struct winlink *);
1.1 nicm 37:
38: /* Find session by name. */
39: struct session *
40: session_find(const char *name)
41: {
42: struct session *s;
43: u_int i;
44:
45: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
46: s = ARRAY_ITEM(&sessions, i);
47: if (s != NULL && strcmp(s->name, name) == 0)
48: return (s);
49: }
50:
51: return (NULL);
52: }
53:
54: /* Create a new session. */
55: struct session *
1.3 nicm 56: session_create(const char *name, const char *cmd, const char *cwd,
1.5 nicm 57: struct environ *env, struct termios *tio, int idx, u_int sx, u_int sy,
58: char **cause)
1.1 nicm 59: {
60: struct session *s;
61: u_int i;
62:
63: s = xmalloc(sizeof *s);
1.7 nicm 64: s->references = 0;
1.1 nicm 65: s->flags = 0;
1.7 nicm 66:
1.12 nicm 67: if (gettimeofday(&s->creation_time, NULL) != 0)
1.9 nicm 68: fatal("gettimeofday failed");
1.12 nicm 69: memcpy(&s->activity_time, &s->creation_time, sizeof s->activity_time);
1.7 nicm 70:
1.1 nicm 71: s->curw = NULL;
1.11 nicm 72: TAILQ_INIT(&s->lastw);
1.1 nicm 73: RB_INIT(&s->windows);
1.7 nicm 74:
1.1 nicm 75: paste_init_stack(&s->buffers);
1.7 nicm 76:
1.2 nicm 77: options_init(&s->options, &global_s_options);
1.3 nicm 78: environ_init(&s->environ);
79: if (env != NULL)
80: environ_copy(env, &s->environ);
1.8 nicm 81:
82: s->tio = NULL;
83: if (tio != NULL) {
84: s->tio = xmalloc(sizeof *s->tio);
85: memcpy(s->tio, tio, sizeof *s->tio);
86: }
1.1 nicm 87:
88: s->sx = sx;
89: s->sy = sy;
90:
91: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
92: if (ARRAY_ITEM(&sessions, i) == NULL) {
93: ARRAY_SET(&sessions, i, s);
94: break;
95: }
96: }
97: if (i == ARRAY_LENGTH(&sessions))
98: ARRAY_ADD(&sessions, s);
99:
100: if (name != NULL)
101: s->name = xstrdup(name);
102: else
103: xasprintf(&s->name, "%u", i);
1.15 nicm 104:
1.11 nicm 105: if (cmd != NULL) {
106: if (session_new(s, NULL, cmd, cwd, idx, cause) == NULL) {
107: session_destroy(s);
108: return (NULL);
109: }
110: session_select(s, RB_ROOT(&s->windows)->idx);
1.1 nicm 111: }
112:
113: log_debug("session %s created", s->name);
114:
115: return (s);
116: }
117:
118: /* Destroy a session. */
119: void
120: session_destroy(struct session *s)
121: {
122: u_int i;
123:
124: log_debug("session %s destroyed", s->name);
125:
126: if (session_index(s, &i) != 0)
127: fatalx("session not found");
128: ARRAY_SET(&sessions, i, NULL);
129: while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
130: ARRAY_TRUNC(&sessions, 1);
131:
1.8 nicm 132: if (s->tio != NULL)
133: xfree(s->tio);
134:
1.11 nicm 135: session_group_remove(s);
1.3 nicm 136: environ_free(&s->environ);
1.1 nicm 137: options_free(&s->options);
138: paste_free_stack(&s->buffers);
139:
1.11 nicm 140: while (!TAILQ_EMPTY(&s->lastw))
141: winlink_stack_remove(&s->lastw, TAILQ_FIRST(&s->lastw));
1.1 nicm 142: while (!RB_EMPTY(&s->windows))
143: winlink_remove(&s->windows, RB_ROOT(&s->windows));
144:
145: xfree(s->name);
1.15 nicm 146:
1.7 nicm 147: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
148: if (ARRAY_ITEM(&dead_sessions, i) == NULL) {
149: ARRAY_SET(&dead_sessions, i, s);
150: break;
151: }
152: }
153: if (i == ARRAY_LENGTH(&dead_sessions))
154: ARRAY_ADD(&dead_sessions, s);
155: s->flags |= SESSION_DEAD;
1.1 nicm 156: }
157:
158: /* Find session index. */
159: int
160: session_index(struct session *s, u_int *i)
161: {
162: for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
163: if (s == ARRAY_ITEM(&sessions, *i))
164: return (0);
165: }
166: return (-1);
167: }
168:
169: /* Create a new window on a session. */
170: struct winlink *
1.15 nicm 171: session_new(struct session *s,
1.1 nicm 172: const char *name, const char *cmd, const char *cwd, int idx, char **cause)
173: {
174: struct window *w;
1.3 nicm 175: struct environ env;
1.6 nicm 176: const char *shell;
1.1 nicm 177: u_int hlimit;
178:
1.3 nicm 179: environ_init(&env);
180: environ_copy(&global_environ, &env);
181: environ_copy(&s->environ, &env);
182: server_fill_environ(s, &env);
1.1 nicm 183:
1.6 nicm 184: shell = options_get_string(&s->options, "default-shell");
185: if (*shell == '\0' || areshell(shell))
186: shell = _PATH_BSHELL;
187:
1.1 nicm 188: hlimit = options_get_number(&s->options, "history-limit");
1.4 nicm 189: w = window_create(
1.8 nicm 190: name, cmd, shell, cwd, &env, s->tio, s->sx, s->sy, hlimit, cause);
1.3 nicm 191: if (w == NULL) {
192: environ_free(&env);
1.1 nicm 193: return (NULL);
1.3 nicm 194: }
195: environ_free(&env);
1.1 nicm 196:
197: if (options_get_number(&s->options, "set-remain-on-exit"))
198: options_set_number(&w->options, "remain-on-exit", 1);
199:
200: return (session_attach(s, w, idx, cause));
201: }
202:
203: /* Attach a window to a session. */
204: struct winlink *
205: session_attach(struct session *s, struct window *w, int idx, char **cause)
206: {
207: struct winlink *wl;
208:
209: if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
210: xasprintf(cause, "index in use: %d", idx);
1.11 nicm 211: session_group_synchronize_from(s);
1.1 nicm 212: return (wl);
213: }
214:
215: /* Detach a window from a session. */
216: int
217: session_detach(struct session *s, struct winlink *wl)
218: {
219: if (s->curw == wl &&
220: session_last(s) != 0 && session_previous(s, 0) != 0)
221: session_next(s, 0);
222:
1.18 ! nicm 223: wl->flags &= ~WINLINK_ALERTFLAGS;
1.1 nicm 224: winlink_stack_remove(&s->lastw, wl);
225: winlink_remove(&s->windows, wl);
1.11 nicm 226: session_group_synchronize_from(s);
1.1 nicm 227: if (RB_EMPTY(&s->windows)) {
228: session_destroy(s);
229: return (1);
230: }
231: return (0);
232: }
233:
234: /* Return if session has window. */
1.18 ! nicm 235: struct winlink *
1.1 nicm 236: session_has(struct session *s, struct window *w)
237: {
238: struct winlink *wl;
239:
240: RB_FOREACH(wl, winlinks, &s->windows) {
241: if (wl->window == w)
1.18 ! nicm 242: return (wl);
1.1 nicm 243: }
1.18 ! nicm 244: return (NULL);
1.1 nicm 245: }
246:
247: struct winlink *
1.18 ! nicm 248: session_next_alert(struct winlink *wl)
1.1 nicm 249: {
250: while (wl != NULL) {
1.18 ! nicm 251: if (wl->flags & WINLINK_ALERTFLAGS)
1.1 nicm 252: break;
1.14 nicm 253: wl = winlink_next(wl);
1.1 nicm 254: }
255: return (wl);
256: }
257:
258: /* Move session to next window. */
259: int
1.17 nicm 260: session_next(struct session *s, int alert)
1.1 nicm 261: {
262: struct winlink *wl;
263:
264: if (s->curw == NULL)
265: return (-1);
266:
1.14 nicm 267: wl = winlink_next(s->curw);
1.17 nicm 268: if (alert)
1.18 ! nicm 269: wl = session_next_alert(wl);
1.1 nicm 270: if (wl == NULL) {
271: wl = RB_MIN(winlinks, &s->windows);
1.18 ! nicm 272: if (alert && ((wl = session_next_alert(wl)) == NULL))
1.1 nicm 273: return (-1);
274: }
275: if (wl == s->curw)
276: return (1);
277: winlink_stack_remove(&s->lastw, wl);
278: winlink_stack_push(&s->lastw, s->curw);
279: s->curw = wl;
1.18 ! nicm 280: wl->flags &= ~WINLINK_ALERTFLAGS;
1.1 nicm 281: return (0);
282: }
283:
284: struct winlink *
1.18 ! nicm 285: session_previous_alert(struct winlink *wl)
1.1 nicm 286: {
287: while (wl != NULL) {
1.18 ! nicm 288: if (wl->flags & WINLINK_ALERTFLAGS)
1.1 nicm 289: break;
1.14 nicm 290: wl = winlink_previous(wl);
1.1 nicm 291: }
292: return (wl);
293: }
294:
295: /* Move session to previous window. */
296: int
1.17 nicm 297: session_previous(struct session *s, int alert)
1.1 nicm 298: {
299: struct winlink *wl;
300:
301: if (s->curw == NULL)
302: return (-1);
303:
1.14 nicm 304: wl = winlink_previous(s->curw);
1.17 nicm 305: if (alert)
1.18 ! nicm 306: wl = session_previous_alert(wl);
1.1 nicm 307: if (wl == NULL) {
308: wl = RB_MAX(winlinks, &s->windows);
1.18 ! nicm 309: if (alert && (wl = session_previous_alert(wl)) == NULL)
1.1 nicm 310: return (-1);
311: }
312: if (wl == s->curw)
313: return (1);
314: winlink_stack_remove(&s->lastw, wl);
315: winlink_stack_push(&s->lastw, s->curw);
316: s->curw = wl;
1.18 ! nicm 317: wl->flags &= ~WINLINK_ALERTFLAGS;
1.1 nicm 318: return (0);
319: }
320:
321: /* Move session to specific window. */
322: int
323: session_select(struct session *s, int idx)
324: {
325: struct winlink *wl;
326:
327: wl = winlink_find_by_index(&s->windows, idx);
328: if (wl == NULL)
329: return (-1);
330: if (wl == s->curw)
331: return (1);
332: winlink_stack_remove(&s->lastw, wl);
333: winlink_stack_push(&s->lastw, s->curw);
334: s->curw = wl;
1.18 ! nicm 335: wl->flags &= ~WINLINK_ALERTFLAGS;
1.1 nicm 336: return (0);
337: }
338:
339: /* Move session to last used window. */
340: int
341: session_last(struct session *s)
342: {
343: struct winlink *wl;
344:
1.11 nicm 345: wl = TAILQ_FIRST(&s->lastw);
1.1 nicm 346: if (wl == NULL)
347: return (-1);
348: if (wl == s->curw)
349: return (1);
350:
351: winlink_stack_remove(&s->lastw, wl);
352: winlink_stack_push(&s->lastw, s->curw);
353: s->curw = wl;
1.18 ! nicm 354: wl->flags &= ~WINLINK_ALERTFLAGS;
1.1 nicm 355: return (0);
1.11 nicm 356: }
357:
358: /* Find the session group containing a session. */
359: struct session_group *
360: session_group_find(struct session *target)
361: {
362: struct session_group *sg;
363: struct session *s;
364:
365: TAILQ_FOREACH(sg, &session_groups, entry) {
366: TAILQ_FOREACH(s, &sg->sessions, gentry) {
367: if (s == target)
368: return (sg);
369: }
370: }
371: return (NULL);
372: }
373:
374: /* Find session group index. */
375: u_int
376: session_group_index(struct session_group *sg)
377: {
378: struct session_group *sg2;
379: u_int i;
380:
381: i = 0;
382: TAILQ_FOREACH(sg2, &session_groups, entry) {
383: if (sg == sg2)
384: return (i);
385: i++;
386: }
387:
388: fatalx("session group not found");
389: }
390:
391: /*
392: * Add a session to the session group containing target, creating it if
1.15 nicm 393: * necessary.
1.11 nicm 394: */
395: void
396: session_group_add(struct session *target, struct session *s)
397: {
398: struct session_group *sg;
399:
400: if ((sg = session_group_find(target)) == NULL) {
401: sg = xmalloc(sizeof *sg);
402: TAILQ_INSERT_TAIL(&session_groups, sg, entry);
403: TAILQ_INIT(&sg->sessions);
404: TAILQ_INSERT_TAIL(&sg->sessions, target, gentry);
405: }
406: TAILQ_INSERT_TAIL(&sg->sessions, s, gentry);
407: }
408:
409: /* Remove a session from its group and destroy the group if empty. */
410: void
411: session_group_remove(struct session *s)
412: {
413: struct session_group *sg;
414:
415: if ((sg = session_group_find(s)) == NULL)
416: return;
417: TAILQ_REMOVE(&sg->sessions, s, gentry);
418: if (TAILQ_NEXT(TAILQ_FIRST(&sg->sessions), gentry) == NULL)
419: TAILQ_REMOVE(&sg->sessions, TAILQ_FIRST(&sg->sessions), gentry);
420: if (TAILQ_EMPTY(&sg->sessions)) {
421: TAILQ_REMOVE(&session_groups, sg, entry);
422: xfree(sg);
423: }
424: }
425:
426: /* Synchronize a session to its session group. */
427: void
428: session_group_synchronize_to(struct session *s)
429: {
430: struct session_group *sg;
431: struct session *target;
432:
433: if ((sg = session_group_find(s)) == NULL)
434: return;
435:
436: target = NULL;
437: TAILQ_FOREACH(target, &sg->sessions, gentry) {
438: if (target != s)
439: break;
440: }
441: session_group_synchronize1(target, s);
442: }
443:
444: /* Synchronize a session group to a session. */
445: void
446: session_group_synchronize_from(struct session *target)
447: {
448: struct session_group *sg;
449: struct session *s;
450:
451: if ((sg = session_group_find(target)) == NULL)
452: return;
453:
454: TAILQ_FOREACH(s, &sg->sessions, gentry) {
455: if (s != target)
456: session_group_synchronize1(target, s);
457: }
458: }
459:
460: /*
461: * Synchronize a session with a target session. This means destroying all
462: * winlinks then recreating them, then updating the current window, last window
463: * stack and alerts.
464: */
465: void
466: session_group_synchronize1(struct session *target, struct session *s)
467: {
468: struct winlinks old_windows, *ww;
469: struct winlink_stack old_lastw;
470: struct winlink *wl, *wl2;
471:
472: /* Don't do anything if the session is empty (it'll be destroyed). */
473: ww = &target->windows;
474: if (RB_EMPTY(ww))
475: return;
476:
477: /* If the current window has vanished, move to the next now. */
1.16 nicm 478: if (s->curw != NULL &&
479: winlink_find_by_index(ww, s->curw->idx) == NULL &&
480: session_last(s) != 0 && session_previous(s, 0) != 0)
481: session_next(s, 0);
1.11 nicm 482:
483: /* Save the old pointer and reset it. */
484: memcpy(&old_windows, &s->windows, sizeof old_windows);
485: RB_INIT(&s->windows);
486:
487: /* Link all the windows from the target. */
1.18 ! nicm 488: RB_FOREACH(wl, winlinks, ww) {
! 489: wl2 = winlink_add(&s->windows, wl->window, wl->idx);
! 490: wl2->flags |= wl->flags & WINLINK_ALERTFLAGS;
! 491: }
1.11 nicm 492:
493: /* Fix up the current window. */
494: if (s->curw != NULL)
495: s->curw = winlink_find_by_index(&s->windows, s->curw->idx);
496: else
497: s->curw = winlink_find_by_index(&s->windows, target->curw->idx);
498:
499: /* Fix up the last window stack. */
500: memcpy(&old_lastw, &s->lastw, sizeof old_lastw);
501: TAILQ_INIT(&s->lastw);
502: TAILQ_FOREACH(wl, &old_lastw, sentry) {
503: wl2 = winlink_find_by_index(&s->windows, wl->idx);
504: if (wl2 != NULL)
505: TAILQ_INSERT_TAIL(&s->lastw, wl2, sentry);
506: }
507:
508: /* Then free the old winlinks list. */
509: while (!RB_EMPTY(&old_windows)) {
510: wl = RB_ROOT(&old_windows);
1.13 nicm 511: winlink_remove(&old_windows, wl);
1.11 nicm 512: }
1.1 nicm 513: }
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