Annotation of src/usr.bin/tmux/server-fn.c, Revision 1.64
1.64 ! nicm 1: /* $OpenBSD: server-fn.c,v 1.63 2013/03/22 10:31:22 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:
1.60 nicm 21: #include <stdlib.h>
1.1 nicm 22: #include <string.h>
1.5 nicm 23: #include <time.h>
1.1 nicm 24: #include <unistd.h>
25:
26: #include "tmux.h"
27:
1.39 nicm 28: struct session *server_next_session(struct session *);
29: void server_callback_identify(int, short, void *);
1.28 nicm 30:
1.13 nicm 31: void
32: server_fill_environ(struct session *s, struct environ *env)
1.1 nicm 33: {
1.50 nicm 34: char var[MAXPATHLEN], *term;
35: u_int idx;
36: long pid;
37:
38: if (s != NULL) {
39: term = options_get_string(&s->options, "default-terminal");
40: environ_set(env, "TERM", term);
41:
42: idx = s->idx;
43: } else
44: idx = -1;
45: pid = getpid();
46: xsnprintf(var, sizeof var, "%s,%ld,%d", socket_path, pid, idx);
47: environ_set(env, "TMUX", var);
1.58 nicm 48: }
49:
50: void
51: server_write_ready(struct client *c)
52: {
1.59 nicm 53: if (c->flags & CLIENT_CONTROL)
54: return;
1.58 nicm 55: server_write_client(c, MSG_READY, NULL, 0);
1.10 nicm 56: }
57:
1.57 nicm 58: int
1.1 nicm 59: server_write_client(
1.11 nicm 60: struct client *c, enum msgtype type, const void *buf, size_t len)
1.1 nicm 61: {
1.14 nicm 62: struct imsgbuf *ibuf = &c->ibuf;
1.57 nicm 63: int error;
1.1 nicm 64:
1.12 nicm 65: if (c->flags & CLIENT_BAD)
1.57 nicm 66: return (-1);
1.14 nicm 67: log_debug("writing %d to client %d", type, c->ibuf.fd);
1.57 nicm 68: error = imsg_compose(ibuf, type, PROTOCOL_VERSION, -1, -1,
69: (void *) buf, len);
70: if (error == 1)
71: server_update_event(c);
72: return (error == 1 ? 0 : -1);
1.1 nicm 73: }
74:
75: void
76: server_write_session(
1.11 nicm 77: struct session *s, enum msgtype type, const void *buf, size_t len)
1.1 nicm 78: {
79: struct client *c;
80: u_int i;
81:
82: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
83: c = ARRAY_ITEM(&clients, i);
84: if (c == NULL || c->session == NULL)
85: continue;
86: if (c->session == s)
87: server_write_client(c, type, buf, len);
88: }
89: }
90:
91: void
92: server_redraw_client(struct client *c)
93: {
94: c->flags |= CLIENT_REDRAW;
95: }
96:
97: void
98: server_status_client(struct client *c)
99: {
100: c->flags |= CLIENT_STATUS;
101: }
102:
103: void
104: server_redraw_session(struct session *s)
105: {
106: struct client *c;
107: u_int i;
108:
109: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
110: c = ARRAY_ITEM(&clients, i);
111: if (c == NULL || c->session == NULL)
112: continue;
113: if (c->session == s)
114: server_redraw_client(c);
115: }
116: }
117:
118: void
1.25 nicm 119: server_redraw_session_group(struct session *s)
120: {
121: struct session_group *sg;
122:
123: if ((sg = session_group_find(s)) == NULL)
124: server_redraw_session(s);
125: else {
126: TAILQ_FOREACH(s, &sg->sessions, gentry)
127: server_redraw_session(s);
128: }
129: }
130:
131: void
1.1 nicm 132: server_status_session(struct session *s)
133: {
134: struct client *c;
135: u_int i;
136:
137: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
138: c = ARRAY_ITEM(&clients, i);
139: if (c == NULL || c->session == NULL)
140: continue;
141: if (c->session == s)
142: server_status_client(c);
143: }
144: }
145:
146: void
1.25 nicm 147: server_status_session_group(struct session *s)
148: {
149: struct session_group *sg;
150:
151: if ((sg = session_group_find(s)) == NULL)
152: server_status_session(s);
153: else {
154: TAILQ_FOREACH(s, &sg->sessions, gentry)
155: server_status_session(s);
156: }
157: }
158:
159: void
1.1 nicm 160: server_redraw_window(struct window *w)
161: {
162: struct client *c;
163: u_int i;
164:
165: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
166: c = ARRAY_ITEM(&clients, i);
167: if (c == NULL || c->session == NULL)
168: continue;
169: if (c->session->curw->window == w)
170: server_redraw_client(c);
171: }
172: w->flags |= WINDOW_REDRAW;
1.33 nicm 173: }
174:
175: void
176: server_redraw_window_borders(struct window *w)
177: {
178: struct client *c;
179: u_int i;
180:
181: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
182: c = ARRAY_ITEM(&clients, i);
183: if (c == NULL || c->session == NULL)
184: continue;
185: if (c->session->curw->window == w)
186: c->flags |= CLIENT_BORDERS;
187: }
1.1 nicm 188: }
189:
190: void
191: server_status_window(struct window *w)
192: {
193: struct session *s;
194:
195: /*
196: * This is slightly different. We want to redraw the status line of any
197: * clients containing this window rather than any where it is the
198: * current window.
199: */
200:
1.47 nicm 201: RB_FOREACH(s, sessions, &sessions) {
202: if (session_has(s, w) != NULL)
1.1 nicm 203: server_status_session(s);
204: }
205: }
206:
207: void
208: server_lock(void)
209: {
1.23 nicm 210: struct client *c;
211: u_int i;
1.17 nicm 212:
1.1 nicm 213: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
214: c = ARRAY_ITEM(&clients, i);
215: if (c == NULL || c->session == NULL)
216: continue;
1.23 nicm 217: server_lock_client(c);
218: }
219: }
1.1 nicm 220:
1.23 nicm 221: void
222: server_lock_session(struct session *s)
223: {
224: struct client *c;
225: u_int i;
226:
227: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
228: c = ARRAY_ITEM(&clients, i);
229: if (c == NULL || c->session == NULL || c->session != s)
230: continue;
231: server_lock_client(c);
1.31 nicm 232: }
1.23 nicm 233: }
1.1 nicm 234:
1.23 nicm 235: void
236: server_lock_client(struct client *c)
237: {
238: const char *cmd;
239: size_t cmdlen;
240: struct msg_lock_data lockdata;
1.62 nicm 241:
1.64 ! nicm 242: if (c->flags & CLIENT_CONTROL)
1.62 nicm 243: return;
1.24 nicm 244:
245: if (c->flags & CLIENT_SUSPENDED)
246: return;
1.1 nicm 247:
1.23 nicm 248: cmd = options_get_string(&c->session->options, "lock-command");
249: cmdlen = strlcpy(lockdata.cmd, cmd, sizeof lockdata.cmd);
250: if (cmdlen >= sizeof lockdata.cmd)
251: return;
1.31 nicm 252:
1.23 nicm 253: tty_stop_tty(&c->tty);
254: tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
255: tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
1.52 nicm 256: tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_E3));
1.23 nicm 257:
258: c->flags |= CLIENT_SUSPENDED;
259: server_write_client(c, MSG_LOCK, &lockdata, sizeof lockdata);
1.8 nicm 260: }
261:
262: void
263: server_kill_window(struct window *w)
264: {
1.48 nicm 265: struct session *s, *next_s;
1.8 nicm 266: struct winlink *wl;
1.31 nicm 267:
1.48 nicm 268: next_s = RB_MIN(sessions, &sessions);
269: while (next_s != NULL) {
270: s = next_s;
271: next_s = RB_NEXT(sessions, &sessions, s);
272:
1.47 nicm 273: if (session_has(s, w) == NULL)
1.8 nicm 274: continue;
1.34 nicm 275: while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
276: if (session_detach(s, wl)) {
277: server_destroy_session_group(s);
278: break;
279: } else
280: server_redraw_session_group(s);
281: }
1.56 nicm 282:
283: if (options_get_number(&s->options, "renumber-windows"))
284: session_renumber_windows(s);
1.8 nicm 285: }
1.21 nicm 286: }
287:
288: int
1.25 nicm 289: server_link_window(struct session *src, struct winlink *srcwl,
290: struct session *dst, int dstidx, int killflag, int selectflag, char **cause)
1.21 nicm 291: {
1.25 nicm 292: struct winlink *dstwl;
293: struct session_group *srcsg, *dstsg;
294:
295: srcsg = session_group_find(src);
296: dstsg = session_group_find(dst);
297: if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
298: xasprintf(cause, "sessions are grouped");
299: return (-1);
300: }
1.21 nicm 301:
302: dstwl = NULL;
303: if (dstidx != -1)
304: dstwl = winlink_find_by_index(&dst->windows, dstidx);
305: if (dstwl != NULL) {
1.44 nicm 306: if (dstwl->window == srcwl->window) {
307: xasprintf(cause, "same index: %d", dstidx);
1.41 nicm 308: return (-1);
1.44 nicm 309: }
1.21 nicm 310: if (killflag) {
311: /*
312: * Can't use session_detach as it will destroy session
313: * if this makes it empty.
314: */
1.55 nicm 315: notify_window_unlinked(dst, dstwl->window);
1.37 nicm 316: dstwl->flags &= ~WINLINK_ALERTFLAGS;
1.21 nicm 317: winlink_stack_remove(&dst->lastw, dstwl);
318: winlink_remove(&dst->windows, dstwl);
319:
320: /* Force select/redraw if current. */
1.26 nicm 321: if (dstwl == dst->curw) {
1.21 nicm 322: selectflag = 1;
1.26 nicm 323: dst->curw = NULL;
324: }
1.21 nicm 325: }
326: }
327:
328: if (dstidx == -1)
329: dstidx = -1 - options_get_number(&dst->options, "base-index");
330: dstwl = session_attach(dst, srcwl->window, dstidx, cause);
331: if (dstwl == NULL)
332: return (-1);
333:
1.25 nicm 334: if (selectflag)
1.21 nicm 335: session_select(dst, dstwl->idx);
1.25 nicm 336: server_redraw_session_group(dst);
1.21 nicm 337:
338: return (0);
339: }
340:
341: void
342: server_unlink_window(struct session *s, struct winlink *wl)
343: {
344: if (session_detach(s, wl))
1.25 nicm 345: server_destroy_session_group(s);
346: else
347: server_redraw_session_group(s);
1.29 nicm 348: }
349:
350: void
351: server_destroy_pane(struct window_pane *wp)
352: {
1.51 nicm 353: struct window *w = wp->window;
354: int old_fd;
355: struct screen_write_ctx ctx;
356: struct grid_cell gc;
1.29 nicm 357:
1.51 nicm 358: old_fd = wp->fd;
1.36 nicm 359: if (wp->fd != -1) {
1.53 nicm 360: bufferevent_free(wp->event);
1.36 nicm 361: close(wp->fd);
362: wp->fd = -1;
363: }
1.29 nicm 364:
1.51 nicm 365: if (options_get_number(&w->options, "remain-on-exit")) {
366: if (old_fd == -1)
367: return;
368: screen_write_start(&ctx, wp, &wp->base);
369: screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1);
370: screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1);
371: screen_write_linefeed(&ctx, 1);
372: memcpy(&gc, &grid_default_cell, sizeof gc);
373: gc.attr |= GRID_ATTR_BRIGHT;
374: screen_write_puts(&ctx, &gc, "Pane is dead");
375: screen_write_stop(&ctx);
376: wp->flags |= PANE_REDRAW;
1.29 nicm 377: return;
1.51 nicm 378: }
1.29 nicm 379:
380: layout_close_pane(wp);
381: window_remove_pane(w, wp);
382:
383: if (TAILQ_EMPTY(&w->panes))
384: server_kill_window(w);
385: else
386: server_redraw_window(w);
1.25 nicm 387: }
388:
389: void
390: server_destroy_session_group(struct session *s)
391: {
392: struct session_group *sg;
393:
394: if ((sg = session_group_find(s)) == NULL)
1.21 nicm 395: server_destroy_session(s);
1.25 nicm 396: else {
397: TAILQ_FOREACH(s, &sg->sessions, gentry)
398: server_destroy_session(s);
399: TAILQ_REMOVE(&session_groups, sg, entry);
1.60 nicm 400: free(sg);
1.25 nicm 401: }
1.19 nicm 402: }
403:
1.39 nicm 404: struct session *
405: server_next_session(struct session *s)
406: {
407: struct session *s_loop, *s_out;
408:
409: s_out = NULL;
1.47 nicm 410: RB_FOREACH(s_loop, sessions, &sessions) {
411: if (s_loop == s)
1.39 nicm 412: continue;
413: if (s_out == NULL ||
414: timercmp(&s_loop->activity_time, &s_out->activity_time, <))
415: s_out = s_loop;
416: }
417: return (s_out);
418: }
419:
1.19 nicm 420: void
421: server_destroy_session(struct session *s)
422: {
423: struct client *c;
1.39 nicm 424: struct session *s_new;
1.19 nicm 425: u_int i;
1.31 nicm 426:
1.39 nicm 427: if (!options_get_number(&s->options, "detach-on-destroy"))
428: s_new = server_next_session(s);
429: else
430: s_new = NULL;
431:
1.19 nicm 432: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
433: c = ARRAY_ITEM(&clients, i);
434: if (c == NULL || c->session != s)
435: continue;
1.39 nicm 436: if (s_new == NULL) {
437: c->session = NULL;
1.40 nicm 438: c->flags |= CLIENT_EXIT;
1.39 nicm 439: } else {
1.46 nicm 440: c->last_session = NULL;
1.39 nicm 441: c->session = s_new;
1.55 nicm 442: notify_attached_session_changed(c);
1.49 nicm 443: session_update_activity(s_new);
1.39 nicm 444: server_redraw_client(c);
445: }
1.19 nicm 446: }
1.38 nicm 447: recalculate_sizes();
1.42 nicm 448: }
449:
450: void
451: server_check_unattached (void)
452: {
453: struct session *s;
454:
455: /*
456: * If any sessions are no longer attached and have destroy-unattached
457: * set, collect them.
458: */
1.47 nicm 459: RB_FOREACH(s, sessions, &sessions) {
460: if (!(s->flags & SESSION_UNATTACHED))
1.42 nicm 461: continue;
462: if (options_get_number (&s->options, "destroy-unattached"))
463: session_destroy(s);
464: }
1.15 nicm 465: }
466:
467: void
468: server_set_identify(struct client *c)
469: {
470: struct timeval tv;
471: int delay;
472:
473: delay = options_get_number(&c->session->options, "display-panes-time");
474: tv.tv_sec = delay / 1000;
475: tv.tv_usec = (delay % 1000) * 1000L;
1.31 nicm 476:
1.54 nicm 477: if (event_initialized (&c->identify_timer))
478: evtimer_del(&c->identify_timer);
1.28 nicm 479: evtimer_set(&c->identify_timer, server_callback_identify, c);
480: evtimer_add(&c->identify_timer, &tv);
1.15 nicm 481:
482: c->flags |= CLIENT_IDENTIFY;
483: c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
484: server_redraw_client(c);
485: }
486:
487: void
488: server_clear_identify(struct client *c)
489: {
490: if (c->flags & CLIENT_IDENTIFY) {
491: c->flags &= ~CLIENT_IDENTIFY;
492: c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
493: server_redraw_client(c);
494: }
1.28 nicm 495: }
496:
497: void
498: server_callback_identify(unused int fd, unused short events, void *data)
499: {
500: struct client *c = data;
501:
502: server_clear_identify(c);
1.27 nicm 503: }
504:
505: void
506: server_update_event(struct client *c)
507: {
508: short events;
509:
510: events = 0;
511: if (!(c->flags & CLIENT_BAD))
512: events |= EV_READ;
513: if (c->ibuf.w.queued > 0)
514: events |= EV_WRITE;
1.54 nicm 515: if (event_initialized(&c->event))
516: event_del(&c->event);
1.27 nicm 517: event_set(&c->event, c->ibuf.fd, events, server_client_callback, c);
1.31 nicm 518: event_add(&c->event, NULL);
1.57 nicm 519: }
520:
521: /* Push stdout to client if possible. */
522: void
523: server_push_stdout(struct client *c)
524: {
525: struct msg_stdout_data data;
526: size_t size;
527:
528: size = EVBUFFER_LENGTH(c->stdout_data);
529: if (size == 0)
530: return;
531: if (size > sizeof data.data)
532: size = sizeof data.data;
533:
534: memcpy(data.data, EVBUFFER_DATA(c->stdout_data), size);
535: data.size = size;
536:
537: if (server_write_client(c, MSG_STDOUT, &data, sizeof data) == 0)
538: evbuffer_drain(c->stdout_data, size);
539: }
540:
541: /* Push stderr to client if possible. */
542: void
543: server_push_stderr(struct client *c)
544: {
545: struct msg_stderr_data data;
546: size_t size;
547:
548: size = EVBUFFER_LENGTH(c->stderr_data);
549: if (size == 0)
550: return;
551: if (size > sizeof data.data)
552: size = sizeof data.data;
553:
554: memcpy(data.data, EVBUFFER_DATA(c->stderr_data), size);
555: data.size = size;
556:
557: if (server_write_client(c, MSG_STDERR, &data, sizeof data) == 0)
558: evbuffer_drain(c->stderr_data, size);
559: }
560:
561: /* Set stdin callback. */
562: int
563: server_set_stdin_callback(struct client *c, void (*cb)(struct client *, int,
564: void *), void *cb_data, char **cause)
565: {
566: if (c == NULL) {
567: *cause = xstrdup("no client with stdin");
568: return (-1);
569: }
570: if (c->flags & CLIENT_TERMINAL) {
571: *cause = xstrdup("stdin is a tty");
572: return (-1);
573: }
574: if (c->stdin_callback != NULL) {
575: *cause = xstrdup("stdin in use");
576: return (-1);
577: }
578:
579: c->stdin_callback_data = cb_data;
580: c->stdin_callback = cb;
581:
582: c->references++;
583:
584: if (c->stdin_closed)
585: c->stdin_callback (c, 1, c->stdin_callback_data);
1.61 nicm 586:
587: server_write_client(c, MSG_STDIN, NULL, 0);
588:
1.57 nicm 589: return (0);
1.1 nicm 590: }
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