Annotation of src/usr.bin/tmux/server-fn.c, Revision 1.71
1.71 ! nicm 1: /* $OpenBSD: server-fn.c,v 1.70 2013/07/05 14:52:33 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:
1.67 nicm 42: idx = s->id;
1.50 nicm 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
1.65 nicm 197: * clients containing this window rather than anywhere it is the
1.1 nicm 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: {
1.70 nicm 265: struct session *s, *next_s, *target_s;
266: struct session_group *sg;
267: struct winlink *wl;
1.31 nicm 268:
1.48 nicm 269: next_s = RB_MIN(sessions, &sessions);
270: while (next_s != NULL) {
271: s = next_s;
272: next_s = RB_NEXT(sessions, &sessions, s);
273:
1.47 nicm 274: if (session_has(s, w) == NULL)
1.8 nicm 275: continue;
1.34 nicm 276: while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
277: if (session_detach(s, wl)) {
278: server_destroy_session_group(s);
279: break;
280: } else
281: server_redraw_session_group(s);
282: }
1.56 nicm 283:
1.70 nicm 284: if (options_get_number(&s->options, "renumber-windows")) {
285: if ((sg = session_group_find(s)) != NULL) {
286: TAILQ_FOREACH(target_s, &sg->sessions, gentry)
287: session_renumber_windows(target_s);
288: } else
289: session_renumber_windows(s);
290: }
1.8 nicm 291: }
1.69 nicm 292: recalculate_sizes();
1.21 nicm 293: }
294:
295: int
1.25 nicm 296: server_link_window(struct session *src, struct winlink *srcwl,
297: struct session *dst, int dstidx, int killflag, int selectflag, char **cause)
1.21 nicm 298: {
1.25 nicm 299: struct winlink *dstwl;
300: struct session_group *srcsg, *dstsg;
301:
302: srcsg = session_group_find(src);
303: dstsg = session_group_find(dst);
304: if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
305: xasprintf(cause, "sessions are grouped");
306: return (-1);
307: }
1.21 nicm 308:
309: dstwl = NULL;
310: if (dstidx != -1)
311: dstwl = winlink_find_by_index(&dst->windows, dstidx);
312: if (dstwl != NULL) {
1.44 nicm 313: if (dstwl->window == srcwl->window) {
314: xasprintf(cause, "same index: %d", dstidx);
1.41 nicm 315: return (-1);
1.44 nicm 316: }
1.21 nicm 317: if (killflag) {
318: /*
319: * Can't use session_detach as it will destroy session
320: * if this makes it empty.
321: */
1.55 nicm 322: notify_window_unlinked(dst, dstwl->window);
1.37 nicm 323: dstwl->flags &= ~WINLINK_ALERTFLAGS;
1.21 nicm 324: winlink_stack_remove(&dst->lastw, dstwl);
325: winlink_remove(&dst->windows, dstwl);
326:
327: /* Force select/redraw if current. */
1.26 nicm 328: if (dstwl == dst->curw) {
1.21 nicm 329: selectflag = 1;
1.26 nicm 330: dst->curw = NULL;
331: }
1.21 nicm 332: }
333: }
334:
335: if (dstidx == -1)
336: dstidx = -1 - options_get_number(&dst->options, "base-index");
337: dstwl = session_attach(dst, srcwl->window, dstidx, cause);
338: if (dstwl == NULL)
339: return (-1);
340:
1.25 nicm 341: if (selectflag)
1.21 nicm 342: session_select(dst, dstwl->idx);
1.25 nicm 343: server_redraw_session_group(dst);
1.21 nicm 344:
345: return (0);
346: }
347:
348: void
349: server_unlink_window(struct session *s, struct winlink *wl)
350: {
351: if (session_detach(s, wl))
1.25 nicm 352: server_destroy_session_group(s);
353: else
354: server_redraw_session_group(s);
1.29 nicm 355: }
356:
357: void
358: server_destroy_pane(struct window_pane *wp)
359: {
1.51 nicm 360: struct window *w = wp->window;
361: int old_fd;
362: struct screen_write_ctx ctx;
363: struct grid_cell gc;
1.29 nicm 364:
1.51 nicm 365: old_fd = wp->fd;
1.36 nicm 366: if (wp->fd != -1) {
1.53 nicm 367: bufferevent_free(wp->event);
1.36 nicm 368: close(wp->fd);
369: wp->fd = -1;
370: }
1.29 nicm 371:
1.51 nicm 372: if (options_get_number(&w->options, "remain-on-exit")) {
373: if (old_fd == -1)
374: return;
375: screen_write_start(&ctx, wp, &wp->base);
376: screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1);
377: screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1);
378: screen_write_linefeed(&ctx, 1);
379: memcpy(&gc, &grid_default_cell, sizeof gc);
380: gc.attr |= GRID_ATTR_BRIGHT;
381: screen_write_puts(&ctx, &gc, "Pane is dead");
382: screen_write_stop(&ctx);
383: wp->flags |= PANE_REDRAW;
1.29 nicm 384: return;
1.51 nicm 385: }
1.29 nicm 386:
1.66 nicm 387: server_unzoom_window(w);
1.29 nicm 388: layout_close_pane(wp);
389: window_remove_pane(w, wp);
390:
391: if (TAILQ_EMPTY(&w->panes))
392: server_kill_window(w);
393: else
394: server_redraw_window(w);
1.25 nicm 395: }
396:
397: void
398: server_destroy_session_group(struct session *s)
399: {
400: struct session_group *sg;
1.71 ! nicm 401: struct session *s1;
1.25 nicm 402:
403: if ((sg = session_group_find(s)) == NULL)
1.21 nicm 404: server_destroy_session(s);
1.25 nicm 405: else {
1.71 ! nicm 406: TAILQ_FOREACH_SAFE(s, &sg->sessions, gentry, s1) {
1.25 nicm 407: server_destroy_session(s);
1.71 ! nicm 408: session_destroy(s);
! 409: }
1.25 nicm 410: }
1.19 nicm 411: }
412:
1.39 nicm 413: struct session *
414: server_next_session(struct session *s)
415: {
416: struct session *s_loop, *s_out;
417:
418: s_out = NULL;
1.47 nicm 419: RB_FOREACH(s_loop, sessions, &sessions) {
420: if (s_loop == s)
1.39 nicm 421: continue;
422: if (s_out == NULL ||
423: timercmp(&s_loop->activity_time, &s_out->activity_time, <))
424: s_out = s_loop;
425: }
426: return (s_out);
427: }
428:
1.19 nicm 429: void
430: server_destroy_session(struct session *s)
431: {
432: struct client *c;
1.39 nicm 433: struct session *s_new;
1.19 nicm 434: u_int i;
1.31 nicm 435:
1.39 nicm 436: if (!options_get_number(&s->options, "detach-on-destroy"))
437: s_new = server_next_session(s);
438: else
439: s_new = NULL;
440:
1.19 nicm 441: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
442: c = ARRAY_ITEM(&clients, i);
443: if (c == NULL || c->session != s)
444: continue;
1.39 nicm 445: if (s_new == NULL) {
446: c->session = NULL;
1.40 nicm 447: c->flags |= CLIENT_EXIT;
1.39 nicm 448: } else {
1.46 nicm 449: c->last_session = NULL;
1.39 nicm 450: c->session = s_new;
1.55 nicm 451: notify_attached_session_changed(c);
1.49 nicm 452: session_update_activity(s_new);
1.39 nicm 453: server_redraw_client(c);
454: }
1.19 nicm 455: }
1.38 nicm 456: recalculate_sizes();
1.42 nicm 457: }
458:
459: void
460: server_check_unattached (void)
461: {
462: struct session *s;
463:
464: /*
465: * If any sessions are no longer attached and have destroy-unattached
466: * set, collect them.
467: */
1.47 nicm 468: RB_FOREACH(s, sessions, &sessions) {
469: if (!(s->flags & SESSION_UNATTACHED))
1.42 nicm 470: continue;
471: if (options_get_number (&s->options, "destroy-unattached"))
472: session_destroy(s);
473: }
1.15 nicm 474: }
475:
476: void
477: server_set_identify(struct client *c)
478: {
479: struct timeval tv;
480: int delay;
481:
482: delay = options_get_number(&c->session->options, "display-panes-time");
483: tv.tv_sec = delay / 1000;
484: tv.tv_usec = (delay % 1000) * 1000L;
1.31 nicm 485:
1.54 nicm 486: if (event_initialized (&c->identify_timer))
487: evtimer_del(&c->identify_timer);
1.28 nicm 488: evtimer_set(&c->identify_timer, server_callback_identify, c);
489: evtimer_add(&c->identify_timer, &tv);
1.15 nicm 490:
491: c->flags |= CLIENT_IDENTIFY;
492: c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
493: server_redraw_client(c);
494: }
495:
496: void
497: server_clear_identify(struct client *c)
498: {
499: if (c->flags & CLIENT_IDENTIFY) {
500: c->flags &= ~CLIENT_IDENTIFY;
501: c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
502: server_redraw_client(c);
503: }
1.28 nicm 504: }
505:
506: void
507: server_callback_identify(unused int fd, unused short events, void *data)
508: {
509: struct client *c = data;
510:
511: server_clear_identify(c);
1.27 nicm 512: }
513:
514: void
515: server_update_event(struct client *c)
516: {
517: short events;
518:
519: events = 0;
520: if (!(c->flags & CLIENT_BAD))
521: events |= EV_READ;
522: if (c->ibuf.w.queued > 0)
523: events |= EV_WRITE;
1.54 nicm 524: if (event_initialized(&c->event))
525: event_del(&c->event);
1.27 nicm 526: event_set(&c->event, c->ibuf.fd, events, server_client_callback, c);
1.31 nicm 527: event_add(&c->event, NULL);
1.57 nicm 528: }
529:
530: /* Push stdout to client if possible. */
531: void
532: server_push_stdout(struct client *c)
533: {
534: struct msg_stdout_data data;
535: size_t size;
536:
537: size = EVBUFFER_LENGTH(c->stdout_data);
538: if (size == 0)
539: return;
540: if (size > sizeof data.data)
541: size = sizeof data.data;
542:
543: memcpy(data.data, EVBUFFER_DATA(c->stdout_data), size);
544: data.size = size;
545:
546: if (server_write_client(c, MSG_STDOUT, &data, sizeof data) == 0)
547: evbuffer_drain(c->stdout_data, size);
548: }
549:
550: /* Push stderr to client if possible. */
551: void
552: server_push_stderr(struct client *c)
553: {
554: struct msg_stderr_data data;
555: size_t size;
556:
1.68 nicm 557: if (c->stderr_data == c->stdout_data) {
558: server_push_stdout(c);
559: return;
560: }
1.57 nicm 561: size = EVBUFFER_LENGTH(c->stderr_data);
562: if (size == 0)
563: return;
564: if (size > sizeof data.data)
565: size = sizeof data.data;
566:
567: memcpy(data.data, EVBUFFER_DATA(c->stderr_data), size);
568: data.size = size;
569:
570: if (server_write_client(c, MSG_STDERR, &data, sizeof data) == 0)
571: evbuffer_drain(c->stderr_data, size);
572: }
573:
574: /* Set stdin callback. */
575: int
576: server_set_stdin_callback(struct client *c, void (*cb)(struct client *, int,
577: void *), void *cb_data, char **cause)
578: {
1.65 nicm 579: if (c == NULL || c->session != NULL) {
1.57 nicm 580: *cause = xstrdup("no client with stdin");
581: return (-1);
582: }
583: if (c->flags & CLIENT_TERMINAL) {
584: *cause = xstrdup("stdin is a tty");
585: return (-1);
586: }
587: if (c->stdin_callback != NULL) {
588: *cause = xstrdup("stdin in use");
589: return (-1);
590: }
591:
592: c->stdin_callback_data = cb_data;
593: c->stdin_callback = cb;
594:
595: c->references++;
596:
597: if (c->stdin_closed)
598: c->stdin_callback (c, 1, c->stdin_callback_data);
1.61 nicm 599:
600: server_write_client(c, MSG_STDIN, NULL, 0);
601:
1.57 nicm 602: return (0);
1.66 nicm 603: }
604:
605: void
606: server_unzoom_window(struct window *w)
607: {
608: window_unzoom(w);
609: server_redraw_window(w);
610: server_status_window(w);
1.1 nicm 611: }