Annotation of src/usr.bin/tmux/session.c, Revision 1.9
1.9 ! nicm 1: /* $OpenBSD: session.c,v 1.8 2009/09/16 12:35:04 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>
26:
27: #include "tmux.h"
28:
29: /* Global session list. */
30: struct sessions sessions;
1.7 nicm 31: struct sessions dead_sessions;
1.1 nicm 32:
33: struct winlink *session_next_activity(struct session *, struct winlink *);
34: struct winlink *session_previous_activity(struct session *, struct winlink *);
35:
36: void
37: session_alert_cancel(struct session *s, struct winlink *wl)
38: {
39: struct session_alert *sa, *sb;
40:
41: sa = SLIST_FIRST(&s->alerts);
42: while (sa != NULL) {
43: sb = sa;
44: sa = SLIST_NEXT(sa, entry);
45:
46: if (wl == NULL || sb->wl == wl) {
47: SLIST_REMOVE(&s->alerts, sb, session_alert, entry);
48: xfree(sb);
49: }
50: }
51: }
52:
53: void
54: session_alert_add(struct session *s, struct window *w, int type)
55: {
56: struct session_alert *sa;
57: struct winlink *wl;
58:
59: RB_FOREACH(wl, winlinks, &s->windows) {
60: if (wl == s->curw)
61: continue;
62:
63: if (wl->window == w &&
64: !session_alert_has(s, wl, type)) {
65: sa = xmalloc(sizeof *sa);
66: sa->wl = wl;
67: sa->type = type;
68: SLIST_INSERT_HEAD(&s->alerts, sa, entry);
69: }
70: }
71: }
72:
73: int
74: session_alert_has(struct session *s, struct winlink *wl, int type)
75: {
76: struct session_alert *sa;
77:
78: SLIST_FOREACH(sa, &s->alerts, entry) {
79: if (sa->wl == wl && sa->type == type)
80: return (1);
81: }
82:
83: return (0);
84: }
85:
86: int
87: session_alert_has_window(struct session *s, struct window *w, int type)
88: {
89: struct session_alert *sa;
90:
91: SLIST_FOREACH(sa, &s->alerts, entry) {
92: if (sa->wl->window == w && sa->type == type)
93: return (1);
94: }
95:
96: return (0);
97: }
98:
99: /* Find session by name. */
100: struct session *
101: session_find(const char *name)
102: {
103: struct session *s;
104: u_int i;
105:
106: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
107: s = ARRAY_ITEM(&sessions, i);
108: if (s != NULL && strcmp(s->name, name) == 0)
109: return (s);
110: }
111:
112: return (NULL);
113: }
114:
115: /* Create a new session. */
116: struct session *
1.3 nicm 117: session_create(const char *name, const char *cmd, const char *cwd,
1.5 nicm 118: struct environ *env, struct termios *tio, int idx, u_int sx, u_int sy,
119: char **cause)
1.1 nicm 120: {
121: struct session *s;
122: u_int i;
123:
124: s = xmalloc(sizeof *s);
1.7 nicm 125: s->references = 0;
1.1 nicm 126: s->flags = 0;
1.7 nicm 127:
1.1 nicm 128: if (gettimeofday(&s->tv, NULL) != 0)
1.9 ! nicm 129: fatal("gettimeofday failed");
1.7 nicm 130:
1.1 nicm 131: s->curw = NULL;
132: SLIST_INIT(&s->lastw);
133: RB_INIT(&s->windows);
134: SLIST_INIT(&s->alerts);
1.7 nicm 135:
1.1 nicm 136: paste_init_stack(&s->buffers);
1.7 nicm 137:
1.2 nicm 138: options_init(&s->options, &global_s_options);
1.3 nicm 139: environ_init(&s->environ);
140: if (env != NULL)
141: environ_copy(env, &s->environ);
1.8 nicm 142:
143: s->tio = NULL;
144: if (tio != NULL) {
145: s->tio = xmalloc(sizeof *s->tio);
146: memcpy(s->tio, tio, sizeof *s->tio);
147: }
1.1 nicm 148:
149: s->sx = sx;
150: s->sy = sy;
151:
152: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
153: if (ARRAY_ITEM(&sessions, i) == NULL) {
154: ARRAY_SET(&sessions, i, s);
155: break;
156: }
157: }
158: if (i == ARRAY_LENGTH(&sessions))
159: ARRAY_ADD(&sessions, s);
160:
161: if (name != NULL)
162: s->name = xstrdup(name);
163: else
164: xasprintf(&s->name, "%u", i);
1.5 nicm 165: if (session_new(s, NULL, cmd, cwd, idx, cause) == NULL) {
1.1 nicm 166: session_destroy(s);
167: return (NULL);
168: }
1.5 nicm 169: session_select(s, RB_ROOT(&s->windows)->idx);
1.1 nicm 170:
171: log_debug("session %s created", s->name);
172:
173: return (s);
174: }
175:
176: /* Destroy a session. */
177: void
178: session_destroy(struct session *s)
179: {
180: u_int i;
181:
182: log_debug("session %s destroyed", s->name);
183:
184: if (session_index(s, &i) != 0)
185: fatalx("session not found");
186: ARRAY_SET(&sessions, i, NULL);
187: while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
188: ARRAY_TRUNC(&sessions, 1);
189:
1.8 nicm 190: if (s->tio != NULL)
191: xfree(s->tio);
192:
1.1 nicm 193: session_alert_cancel(s, NULL);
1.3 nicm 194: environ_free(&s->environ);
1.1 nicm 195: options_free(&s->options);
196: paste_free_stack(&s->buffers);
197:
198: while (!SLIST_EMPTY(&s->lastw))
199: winlink_stack_remove(&s->lastw, SLIST_FIRST(&s->lastw));
200: while (!RB_EMPTY(&s->windows))
201: winlink_remove(&s->windows, RB_ROOT(&s->windows));
202:
203: xfree(s->name);
1.7 nicm 204:
205: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
206: if (ARRAY_ITEM(&dead_sessions, i) == NULL) {
207: ARRAY_SET(&dead_sessions, i, s);
208: break;
209: }
210: }
211: if (i == ARRAY_LENGTH(&dead_sessions))
212: ARRAY_ADD(&dead_sessions, s);
213: s->flags |= SESSION_DEAD;
1.1 nicm 214: }
215:
216: /* Find session index. */
217: int
218: session_index(struct session *s, u_int *i)
219: {
220: for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
221: if (s == ARRAY_ITEM(&sessions, *i))
222: return (0);
223: }
224: return (-1);
225: }
226:
227: /* Create a new window on a session. */
228: struct winlink *
1.4 nicm 229: session_new(struct session *s,
1.1 nicm 230: const char *name, const char *cmd, const char *cwd, int idx, char **cause)
231: {
232: struct window *w;
1.3 nicm 233: struct environ env;
1.6 nicm 234: const char *shell;
1.1 nicm 235: u_int hlimit;
236:
1.3 nicm 237: environ_init(&env);
238: environ_copy(&global_environ, &env);
239: environ_copy(&s->environ, &env);
240: server_fill_environ(s, &env);
1.1 nicm 241:
1.6 nicm 242: shell = options_get_string(&s->options, "default-shell");
243: if (*shell == '\0' || areshell(shell))
244: shell = _PATH_BSHELL;
245:
1.1 nicm 246: hlimit = options_get_number(&s->options, "history-limit");
1.4 nicm 247: w = window_create(
1.8 nicm 248: name, cmd, shell, cwd, &env, s->tio, s->sx, s->sy, hlimit, cause);
1.3 nicm 249: if (w == NULL) {
250: environ_free(&env);
1.1 nicm 251: return (NULL);
1.3 nicm 252: }
253: environ_free(&env);
1.1 nicm 254:
255: if (options_get_number(&s->options, "set-remain-on-exit"))
256: options_set_number(&w->options, "remain-on-exit", 1);
257:
258: return (session_attach(s, w, idx, cause));
259: }
260:
261: /* Attach a window to a session. */
262: struct winlink *
263: session_attach(struct session *s, struct window *w, int idx, char **cause)
264: {
265: struct winlink *wl;
266:
267: if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
268: xasprintf(cause, "index in use: %d", idx);
269: return (wl);
270: }
271:
272: /* Detach a window from a session. */
273: int
274: session_detach(struct session *s, struct winlink *wl)
275: {
276: if (s->curw == wl &&
277: session_last(s) != 0 && session_previous(s, 0) != 0)
278: session_next(s, 0);
279:
280: session_alert_cancel(s, wl);
281: winlink_stack_remove(&s->lastw, wl);
282: winlink_remove(&s->windows, wl);
283: if (RB_EMPTY(&s->windows)) {
284: session_destroy(s);
285: return (1);
286: }
287: return (0);
288: }
289:
290: /* Return if session has window. */
291: int
292: session_has(struct session *s, struct window *w)
293: {
294: struct winlink *wl;
295:
296: RB_FOREACH(wl, winlinks, &s->windows) {
297: if (wl->window == w)
298: return (1);
299: }
300: return (0);
301: }
302:
303: struct winlink *
304: session_next_activity(struct session *s, struct winlink *wl)
305: {
306: while (wl != NULL) {
307: if (session_alert_has(s, wl, WINDOW_BELL))
308: break;
309: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
310: break;
311: if (session_alert_has(s, wl, WINDOW_CONTENT))
312: break;
313: wl = winlink_next(&s->windows, wl);
314: }
315: return (wl);
316: }
317:
318: /* Move session to next window. */
319: int
320: session_next(struct session *s, int activity)
321: {
322: struct winlink *wl;
323:
324: if (s->curw == NULL)
325: return (-1);
326:
327: wl = winlink_next(&s->windows, s->curw);
328: if (activity)
329: wl = session_next_activity(s, wl);
330: if (wl == NULL) {
331: wl = RB_MIN(winlinks, &s->windows);
332: if (activity && ((wl = session_next_activity(s, wl)) == NULL))
333: return (-1);
334: }
335: if (wl == s->curw)
336: return (1);
337: winlink_stack_remove(&s->lastw, wl);
338: winlink_stack_push(&s->lastw, s->curw);
339: s->curw = wl;
340: session_alert_cancel(s, wl);
341: return (0);
342: }
343:
344: struct winlink *
345: session_previous_activity(struct session *s, struct winlink *wl)
346: {
347: while (wl != NULL) {
348: if (session_alert_has(s, wl, WINDOW_BELL))
349: break;
350: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
351: break;
352: if (session_alert_has(s, wl, WINDOW_CONTENT))
353: break;
354: wl = winlink_previous(&s->windows, wl);
355: }
356: return (wl);
357: }
358:
359: /* Move session to previous window. */
360: int
361: session_previous(struct session *s, int activity)
362: {
363: struct winlink *wl;
364:
365: if (s->curw == NULL)
366: return (-1);
367:
368: wl = winlink_previous(&s->windows, s->curw);
369: if (activity)
370: wl = session_previous_activity(s, wl);
371: if (wl == NULL) {
372: wl = RB_MAX(winlinks, &s->windows);
373: if (activity && (wl = session_previous_activity(s, wl)) == NULL)
374: return (-1);
375: }
376: if (wl == s->curw)
377: return (1);
378: winlink_stack_remove(&s->lastw, wl);
379: winlink_stack_push(&s->lastw, s->curw);
380: s->curw = wl;
381: session_alert_cancel(s, wl);
382: return (0);
383: }
384:
385: /* Move session to specific window. */
386: int
387: session_select(struct session *s, int idx)
388: {
389: struct winlink *wl;
390:
391: wl = winlink_find_by_index(&s->windows, idx);
392: if (wl == NULL)
393: return (-1);
394: if (wl == s->curw)
395: return (1);
396: winlink_stack_remove(&s->lastw, wl);
397: winlink_stack_push(&s->lastw, s->curw);
398: s->curw = wl;
399: session_alert_cancel(s, wl);
400: return (0);
401: }
402:
403: /* Move session to last used window. */
404: int
405: session_last(struct session *s)
406: {
407: struct winlink *wl;
408:
409: wl = SLIST_FIRST(&s->lastw);
410: if (wl == NULL)
411: return (-1);
412: if (wl == s->curw)
413: return (1);
414:
415: winlink_stack_remove(&s->lastw, wl);
416: winlink_stack_push(&s->lastw, s->curw);
417: s->curw = wl;
418: session_alert_cancel(s, wl);
419: return (0);
420: }
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