Annotation of src/usr.bin/tmux/session.c, Revision 1.7
1.7 ! nicm 1: /* $OpenBSD: session.c,v 1.6 2009/09/01 13:09:49 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)
129: fatal("gettimeofday");
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);
1.4 nicm 142: memcpy(&s->tio, tio, sizeof s->tio);
1.1 nicm 143:
144: s->sx = sx;
145: s->sy = sy;
146:
147: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
148: if (ARRAY_ITEM(&sessions, i) == NULL) {
149: ARRAY_SET(&sessions, i, s);
150: break;
151: }
152: }
153: if (i == ARRAY_LENGTH(&sessions))
154: ARRAY_ADD(&sessions, s);
155:
156: if (name != NULL)
157: s->name = xstrdup(name);
158: else
159: xasprintf(&s->name, "%u", i);
1.5 nicm 160: if (session_new(s, NULL, cmd, cwd, idx, cause) == NULL) {
1.1 nicm 161: session_destroy(s);
162: return (NULL);
163: }
1.5 nicm 164: session_select(s, RB_ROOT(&s->windows)->idx);
1.1 nicm 165:
166: log_debug("session %s created", s->name);
167:
168: return (s);
169: }
170:
171: /* Destroy a session. */
172: void
173: session_destroy(struct session *s)
174: {
175: u_int i;
176:
177: log_debug("session %s destroyed", s->name);
178:
179: if (session_index(s, &i) != 0)
180: fatalx("session not found");
181: ARRAY_SET(&sessions, i, NULL);
182: while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
183: ARRAY_TRUNC(&sessions, 1);
184:
185: session_alert_cancel(s, NULL);
1.3 nicm 186: environ_free(&s->environ);
1.1 nicm 187: options_free(&s->options);
188: paste_free_stack(&s->buffers);
189:
190: while (!SLIST_EMPTY(&s->lastw))
191: winlink_stack_remove(&s->lastw, SLIST_FIRST(&s->lastw));
192: while (!RB_EMPTY(&s->windows))
193: winlink_remove(&s->windows, RB_ROOT(&s->windows));
194:
195: xfree(s->name);
1.7 ! nicm 196:
! 197: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
! 198: if (ARRAY_ITEM(&dead_sessions, i) == NULL) {
! 199: ARRAY_SET(&dead_sessions, i, s);
! 200: break;
! 201: }
! 202: }
! 203: if (i == ARRAY_LENGTH(&dead_sessions))
! 204: ARRAY_ADD(&dead_sessions, s);
! 205: s->flags |= SESSION_DEAD;
1.1 nicm 206: }
207:
208: /* Find session index. */
209: int
210: session_index(struct session *s, u_int *i)
211: {
212: for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
213: if (s == ARRAY_ITEM(&sessions, *i))
214: return (0);
215: }
216: return (-1);
217: }
218:
219: /* Create a new window on a session. */
220: struct winlink *
1.4 nicm 221: session_new(struct session *s,
1.1 nicm 222: const char *name, const char *cmd, const char *cwd, int idx, char **cause)
223: {
224: struct window *w;
1.3 nicm 225: struct environ env;
1.6 nicm 226: const char *shell;
1.1 nicm 227: u_int hlimit;
228:
1.3 nicm 229: environ_init(&env);
230: environ_copy(&global_environ, &env);
231: environ_copy(&s->environ, &env);
232: server_fill_environ(s, &env);
1.1 nicm 233:
1.6 nicm 234: shell = options_get_string(&s->options, "default-shell");
235: if (*shell == '\0' || areshell(shell))
236: shell = _PATH_BSHELL;
237:
1.1 nicm 238: hlimit = options_get_number(&s->options, "history-limit");
1.4 nicm 239: w = window_create(
1.6 nicm 240: name, cmd, shell, cwd, &env, &s->tio, s->sx, s->sy, hlimit, cause);
1.3 nicm 241: if (w == NULL) {
242: environ_free(&env);
1.1 nicm 243: return (NULL);
1.3 nicm 244: }
245: environ_free(&env);
1.1 nicm 246:
247: if (options_get_number(&s->options, "set-remain-on-exit"))
248: options_set_number(&w->options, "remain-on-exit", 1);
249:
250: return (session_attach(s, w, idx, cause));
251: }
252:
253: /* Attach a window to a session. */
254: struct winlink *
255: session_attach(struct session *s, struct window *w, int idx, char **cause)
256: {
257: struct winlink *wl;
258:
259: if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
260: xasprintf(cause, "index in use: %d", idx);
261: return (wl);
262: }
263:
264: /* Detach a window from a session. */
265: int
266: session_detach(struct session *s, struct winlink *wl)
267: {
268: if (s->curw == wl &&
269: session_last(s) != 0 && session_previous(s, 0) != 0)
270: session_next(s, 0);
271:
272: session_alert_cancel(s, wl);
273: winlink_stack_remove(&s->lastw, wl);
274: winlink_remove(&s->windows, wl);
275: if (RB_EMPTY(&s->windows)) {
276: session_destroy(s);
277: return (1);
278: }
279: return (0);
280: }
281:
282: /* Return if session has window. */
283: int
284: session_has(struct session *s, struct window *w)
285: {
286: struct winlink *wl;
287:
288: RB_FOREACH(wl, winlinks, &s->windows) {
289: if (wl->window == w)
290: return (1);
291: }
292: return (0);
293: }
294:
295: struct winlink *
296: session_next_activity(struct session *s, struct winlink *wl)
297: {
298: while (wl != NULL) {
299: if (session_alert_has(s, wl, WINDOW_BELL))
300: break;
301: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
302: break;
303: if (session_alert_has(s, wl, WINDOW_CONTENT))
304: break;
305: wl = winlink_next(&s->windows, wl);
306: }
307: return (wl);
308: }
309:
310: /* Move session to next window. */
311: int
312: session_next(struct session *s, int activity)
313: {
314: struct winlink *wl;
315:
316: if (s->curw == NULL)
317: return (-1);
318:
319: wl = winlink_next(&s->windows, s->curw);
320: if (activity)
321: wl = session_next_activity(s, wl);
322: if (wl == NULL) {
323: wl = RB_MIN(winlinks, &s->windows);
324: if (activity && ((wl = session_next_activity(s, wl)) == NULL))
325: return (-1);
326: }
327: if (wl == s->curw)
328: return (1);
329: winlink_stack_remove(&s->lastw, wl);
330: winlink_stack_push(&s->lastw, s->curw);
331: s->curw = wl;
332: session_alert_cancel(s, wl);
333: return (0);
334: }
335:
336: struct winlink *
337: session_previous_activity(struct session *s, struct winlink *wl)
338: {
339: while (wl != NULL) {
340: if (session_alert_has(s, wl, WINDOW_BELL))
341: break;
342: if (session_alert_has(s, wl, WINDOW_ACTIVITY))
343: break;
344: if (session_alert_has(s, wl, WINDOW_CONTENT))
345: break;
346: wl = winlink_previous(&s->windows, wl);
347: }
348: return (wl);
349: }
350:
351: /* Move session to previous window. */
352: int
353: session_previous(struct session *s, int activity)
354: {
355: struct winlink *wl;
356:
357: if (s->curw == NULL)
358: return (-1);
359:
360: wl = winlink_previous(&s->windows, s->curw);
361: if (activity)
362: wl = session_previous_activity(s, wl);
363: if (wl == NULL) {
364: wl = RB_MAX(winlinks, &s->windows);
365: if (activity && (wl = session_previous_activity(s, wl)) == NULL)
366: return (-1);
367: }
368: if (wl == s->curw)
369: return (1);
370: winlink_stack_remove(&s->lastw, wl);
371: winlink_stack_push(&s->lastw, s->curw);
372: s->curw = wl;
373: session_alert_cancel(s, wl);
374: return (0);
375: }
376:
377: /* Move session to specific window. */
378: int
379: session_select(struct session *s, int idx)
380: {
381: struct winlink *wl;
382:
383: wl = winlink_find_by_index(&s->windows, idx);
384: if (wl == NULL)
385: return (-1);
386: if (wl == s->curw)
387: return (1);
388: winlink_stack_remove(&s->lastw, wl);
389: winlink_stack_push(&s->lastw, s->curw);
390: s->curw = wl;
391: session_alert_cancel(s, wl);
392: return (0);
393: }
394:
395: /* Move session to last used window. */
396: int
397: session_last(struct session *s)
398: {
399: struct winlink *wl;
400:
401: wl = SLIST_FIRST(&s->lastw);
402: if (wl == NULL)
403: return (-1);
404: if (wl == s->curw)
405: return (1);
406:
407: winlink_stack_remove(&s->lastw, wl);
408: winlink_stack_push(&s->lastw, s->curw);
409: s->curw = wl;
410: session_alert_cancel(s, wl);
411: return (0);
412: }
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