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1.26 ! nicm 1: /* $OpenBSD: server.c,v 1.25 2009/08/31 11:37:27 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/ioctl.h>
21: #include <sys/socket.h>
22: #include <sys/stat.h>
23: #include <sys/un.h>
24: #include <sys/wait.h>
25:
26: #include <errno.h>
27: #include <fcntl.h>
1.5 nicm 28: #include <paths.h>
1.1 nicm 29: #include <signal.h>
30: #include <stdio.h>
31: #include <stdlib.h>
32: #include <string.h>
33: #include <syslog.h>
34: #include <termios.h>
35: #include <time.h>
36: #include <unistd.h>
37:
38: #include "tmux.h"
39:
40: /*
41: * Main server functions.
42: */
43:
44: /* Client list. */
45: struct clients clients;
46:
1.13 nicm 47: void server_create_client(int);
1.1 nicm 48: int server_create_socket(void);
49: int server_main(int);
50: void server_shutdown(void);
51: void server_child_signal(void);
52: void server_fill_windows(struct pollfd **);
53: void server_handle_windows(struct pollfd **);
54: void server_fill_clients(struct pollfd **);
55: void server_handle_clients(struct pollfd **);
1.13 nicm 56: void server_accept_client(int);
1.1 nicm 57: void server_handle_client(struct client *);
58: void server_handle_window(struct window *, struct window_pane *);
1.10 nicm 59: int server_check_window_bell(struct session *, struct window *);
1.1 nicm 60: int server_check_window_activity(struct session *,
61: struct window *);
62: int server_check_window_content(struct session *, struct window *,
63: struct window_pane *);
64: void server_lost_client(struct client *);
65: void server_check_window(struct window *);
66: void server_check_redraw(struct client *);
67: void server_redraw_locked(struct client *);
68: void server_check_timers(struct client *);
69: void server_second_timers(void);
70: int server_update_socket(void);
71:
72: /* Create a new client. */
1.13 nicm 73: void
1.1 nicm 74: server_create_client(int fd)
75: {
76: struct client *c;
77: int mode;
78: u_int i;
79:
80: if ((mode = fcntl(fd, F_GETFL)) == -1)
81: fatal("fcntl failed");
82: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
83: fatal("fcntl failed");
84: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
85: fatal("fcntl failed");
86:
87: c = xcalloc(1, sizeof *c);
1.18 nicm 88: imsg_init(&c->ibuf, fd);
1.1 nicm 89:
90: ARRAY_INIT(&c->prompt_hdata);
91:
92: c->tty.fd = -1;
93: c->title = NULL;
94:
95: c->session = NULL;
96: c->tty.sx = 80;
97: c->tty.sy = 25;
98: screen_init(&c->status, c->tty.sx, 1, 0);
99:
100: c->message_string = NULL;
101:
102: c->prompt_string = NULL;
103: c->prompt_buffer = NULL;
104: c->prompt_index = 0;
105:
106: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
107: if (ARRAY_ITEM(&clients, i) == NULL) {
108: ARRAY_SET(&clients, i, c);
1.13 nicm 109: return;
1.1 nicm 110: }
111: }
112: ARRAY_ADD(&clients, c);
1.20 nicm 113: log_debug("new client %d", fd);
1.1 nicm 114: }
115:
116: /* Find client index. */
117: int
118: server_client_index(struct client *c)
119: {
120: u_int i;
121:
122: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
123: if (c == ARRAY_ITEM(&clients, i))
124: return (i);
125: }
126: return (-1);
127: }
128:
129: /* Fork new server. */
130: int
131: server_start(char *path)
132: {
1.16 nicm 133: struct client *c;
134: int pair[2], srv_fd;
135: char *cause;
136: char rpathbuf[MAXPATHLEN];
1.1 nicm 137:
138: /* The first client is special and gets a socketpair; create it. */
139: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
140: fatal("socketpair failed");
141:
142: switch (fork()) {
143: case -1:
144: fatal("fork failed");
145: case 0:
146: break;
147: default:
148: close(pair[1]);
149: return (pair[0]);
150: }
151: close(pair[0]);
152:
153: /*
154: * Must daemonise before loading configuration as the PID changes so
155: * $TMUX would be wrong for sessions created in the config file.
156: */
1.16 nicm 157: if (daemon(1, 0) != 0)
1.1 nicm 158: fatal("daemon failed");
159:
1.16 nicm 160: logfile("server");
161: log_debug("server started, pid %ld", (long) getpid());
162:
1.1 nicm 163: ARRAY_INIT(&windows);
164: ARRAY_INIT(&clients);
165: ARRAY_INIT(&sessions);
1.15 nicm 166: mode_key_init_trees();
1.1 nicm 167: key_bindings_init();
168: utf8_build();
169:
170: server_locked = 0;
171: server_password = NULL;
172: server_activity = time(NULL);
173:
174: start_time = time(NULL);
175: socket_path = path;
176:
1.16 nicm 177: if (realpath(socket_path, rpathbuf) == NULL)
178: strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
179: log_debug("socket path %s", socket_path);
180: setproctitle("server (%s)", rpathbuf);
181:
182: srv_fd = server_create_socket();
183: server_create_client(pair[1]);
184:
1.7 nicm 185: if (access(SYSTEM_CFG, R_OK) != 0) {
186: if (errno != ENOENT) {
1.16 nicm 187: xasprintf(
188: &cause, "%s: %s", strerror(errno), SYSTEM_CFG);
189: goto error;
190: }
1.24 nicm 191: } else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
1.16 nicm 192: goto error;
1.24 nicm 193: if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
1.16 nicm 194: goto error;
1.5 nicm 195:
1.16 nicm 196: exit(server_main(srv_fd));
1.1 nicm 197:
1.16 nicm 198: error:
199: /* Write the error and shutdown the server. */
200: c = ARRAY_FIRST(&clients);
1.1 nicm 201:
1.16 nicm 202: server_write_error(c, cause);
203: xfree(cause);
1.1 nicm 204:
1.16 nicm 205: server_shutdown();
206: c->flags |= CLIENT_BAD;
1.1 nicm 207:
208: exit(server_main(srv_fd));
209: }
210:
211: /* Create server socket. */
212: int
213: server_create_socket(void)
214: {
215: struct sockaddr_un sa;
216: size_t size;
217: mode_t mask;
218: int fd, mode;
219:
220: memset(&sa, 0, sizeof sa);
221: sa.sun_family = AF_UNIX;
222: size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
223: if (size >= sizeof sa.sun_path) {
224: errno = ENAMETOOLONG;
225: fatal("socket failed");
226: }
227: unlink(sa.sun_path);
228:
229: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
230: fatal("socket failed");
231:
232: mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
233: if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
234: fatal("bind failed");
235: umask(mask);
236:
237: if (listen(fd, 16) == -1)
238: fatal("listen failed");
239:
240: if ((mode = fcntl(fd, F_GETFL)) == -1)
241: fatal("fcntl failed");
242: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
243: fatal("fcntl failed");
244: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
245: fatal("fcntl failed");
246:
247: return (fd);
248: }
249:
250: /* Main server loop. */
251: int
252: server_main(int srv_fd)
253: {
254: struct window *w;
255: struct pollfd *pfds, *pfd;
256: int nfds, xtimeout;
257: u_int i, n;
258: time_t now, last;
259:
260: siginit();
1.20 nicm 261: log_debug("server socket is %d", srv_fd);
1.1 nicm 262:
263: last = time(NULL);
264:
265: pfds = NULL;
266: for (;;) {
267: /* If sigterm, kill all windows and clients. */
268: if (sigterm)
269: server_shutdown();
270:
271: /* Handle child exit. */
272: if (sigchld) {
273: server_child_signal();
274: sigchld = 0;
275: }
276:
277: /* Recreate socket on SIGUSR1. */
278: if (sigusr1) {
279: close(srv_fd);
280: srv_fd = server_create_socket();
281: sigusr1 = 0;
282: }
283:
284: /* Initialise pollfd array. */
285: nfds = 1;
286: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
287: w = ARRAY_ITEM(&windows, i);
288: if (w != NULL)
289: nfds += window_count_panes(w);
290: }
291: nfds += ARRAY_LENGTH(&clients) * 2;
292: pfds = xrealloc(pfds, nfds, sizeof *pfds);
293: memset(pfds, 0, nfds * sizeof *pfds);
294: pfd = pfds;
295:
296: /* Fill server socket. */
297: pfd->fd = srv_fd;
298: pfd->events = POLLIN;
299: pfd++;
300:
301: /* Fill window and client sockets. */
302: server_fill_windows(&pfd);
303: server_fill_clients(&pfd);
304:
305: /* Update socket permissions. */
306: xtimeout = INFTIM;
307: if (sigterm || server_update_socket() != 0)
308: xtimeout = POLL_TIMEOUT;
309:
310: /* Do the poll. */
1.4 nicm 311: if (poll(pfds, nfds, xtimeout) == -1) {
1.1 nicm 312: if (errno == EAGAIN || errno == EINTR)
313: continue;
314: fatal("poll failed");
315: }
316: pfd = pfds;
317:
318: /* Handle server socket. */
319: if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
320: fatalx("lost server socket");
321: if (pfd->revents & POLLIN) {
322: server_accept_client(srv_fd);
323: continue;
324: }
325: pfd++;
326:
327: /* Call second-based timers. */
328: now = time(NULL);
329: if (now != last) {
330: last = now;
331: server_second_timers();
332: }
333:
334: /* Set window names. */
335: set_window_names();
336:
337: /*
338: * Handle window and client sockets. Clients can create
339: * windows, so windows must come first to avoid messing up by
340: * increasing the array size.
341: */
342: server_handle_windows(&pfd);
343: server_handle_clients(&pfd);
344:
1.8 nicm 345: /* Collect any unset key bindings. */
346: key_bindings_clean();
347:
1.1 nicm 348: /*
349: * If we have no sessions and clients left, let's get out
350: * of here...
351: */
352: n = 0;
353: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
354: if (ARRAY_ITEM(&sessions, i) != NULL)
355: n++;
356: }
357: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
358: if (ARRAY_ITEM(&clients, i) != NULL)
359: n++;
360: }
361: if (n == 0)
362: break;
363: }
364: if (pfds != NULL)
365: xfree(pfds);
366:
367: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
368: if (ARRAY_ITEM(&sessions, i) != NULL)
369: session_destroy(ARRAY_ITEM(&sessions, i));
370: }
371: ARRAY_FREE(&sessions);
372:
373: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
374: if (ARRAY_ITEM(&clients, i) != NULL)
375: server_lost_client(ARRAY_ITEM(&clients, i));
376: }
377: ARRAY_FREE(&clients);
378:
1.15 nicm 379: mode_key_free_trees();
1.1 nicm 380: key_bindings_free();
381:
382: close(srv_fd);
383:
384: unlink(socket_path);
385: xfree(socket_path);
386:
1.6 nicm 387: options_free(&global_s_options);
388: options_free(&global_w_options);
1.1 nicm 389: if (server_password != NULL)
390: xfree(server_password);
391:
392: return (0);
393: }
394:
395: /* Kill all clients. */
396: void
397: server_shutdown(void)
398: {
399: struct session *s;
400: struct client *c;
401: u_int i, j;
402:
403: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
404: s = ARRAY_ITEM(&sessions, i);
405: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
406: c = ARRAY_ITEM(&clients, j);
407: if (c != NULL && c->session == s) {
408: s = NULL;
409: break;
410: }
411: }
412: if (s != NULL)
413: session_destroy(s);
414: }
415:
416: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
417: c = ARRAY_ITEM(&clients, i);
1.16 nicm 418: if (c != NULL) {
419: if (c->flags & CLIENT_BAD)
420: server_lost_client(c);
421: else
422: server_write_client(c, MSG_SHUTDOWN, NULL, 0);
423: c->flags |= CLIENT_BAD;
424: }
1.1 nicm 425: }
426: }
427:
428: /* Handle SIGCHLD. */
429: void
430: server_child_signal(void)
431: {
432: struct window *w;
433: struct window_pane *wp;
434: int status;
435: pid_t pid;
436: u_int i;
437:
438: for (;;) {
439: switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
440: case -1:
441: if (errno == ECHILD)
442: return;
443: fatal("waitpid");
444: case 0:
445: return;
446: }
447: if (!WIFSTOPPED(status))
448: continue;
449: if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
450: continue;
451:
452: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
453: w = ARRAY_ITEM(&windows, i);
454: if (w == NULL)
455: continue;
456: TAILQ_FOREACH(wp, &w->panes, entry) {
457: if (wp->pid == pid) {
458: if (killpg(pid, SIGCONT) != 0)
459: kill(pid, SIGCONT);
460: }
461: }
462: }
463: }
464: }
465:
466: /* Fill window pollfds. */
467: void
468: server_fill_windows(struct pollfd **pfd)
469: {
470: struct window *w;
471: struct window_pane *wp;
472: u_int i;
473:
474: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
475: w = ARRAY_ITEM(&windows, i);
476: if (w == NULL)
477: continue;
478:
479: TAILQ_FOREACH(wp, &w->panes, entry) {
480: (*pfd)->fd = wp->fd;
481: if (wp->fd != -1) {
482: (*pfd)->events = POLLIN;
483: if (BUFFER_USED(wp->out) > 0)
484: (*pfd)->events |= POLLOUT;
485: }
486: (*pfd)++;
487: }
488: }
489: }
490:
491: /* Handle window pollfds. */
492: void
493: server_handle_windows(struct pollfd **pfd)
494: {
495: struct window *w;
496: struct window_pane *wp;
497: u_int i;
498:
499: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
500: w = ARRAY_ITEM(&windows, i);
501: if (w == NULL)
502: continue;
503:
504: TAILQ_FOREACH(wp, &w->panes, entry) {
505: if (wp->fd != -1) {
506: if (buffer_poll(*pfd, wp->in, wp->out) != 0) {
507: close(wp->fd);
508: wp->fd = -1;
509: } else
510: server_handle_window(w, wp);
511: }
512: (*pfd)++;
513: }
514:
515: server_check_window(w);
516: }
517: }
518:
519: /* Check for general redraw on client. */
520: void
521: server_check_redraw(struct client *c)
522: {
523: struct session *s;
524: struct window_pane *wp;
525: char title[512];
526: int flags, redraw;
527:
528: if (c == NULL || c->session == NULL)
529: return;
530: s = c->session;
531:
532: flags = c->tty.flags & TTY_FREEZE;
533: c->tty.flags &= ~TTY_FREEZE;
534:
535: if (options_get_number(&s->options, "set-titles")) {
536: xsnprintf(title, sizeof title, "%s:%u:%s - \"%s\"",
537: s->name, s->curw->idx, s->curw->window->name,
538: s->curw->window->active->screen->title);
539: if (c->title == NULL || strcmp(title, c->title) != 0) {
540: if (c->title != NULL)
541: xfree(c->title);
542: c->title = xstrdup(title);
543: tty_set_title(&c->tty, c->title);
544: }
545: }
546:
547: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
548: if (c->message_string != NULL)
549: redraw = status_message_redraw(c);
550: else if (c->prompt_string != NULL)
551: redraw = status_prompt_redraw(c);
552: else
553: redraw = status_redraw(c);
554: if (!redraw)
555: c->flags &= ~CLIENT_STATUS;
556: }
557:
558: if (c->flags & CLIENT_REDRAW) {
559: if (server_locked)
560: server_redraw_locked(c);
561: else
1.9 nicm 562: screen_redraw_screen(c, 0);
1.1 nicm 563: c->flags &= ~CLIENT_STATUS;
564: } else {
565: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
566: if (wp->flags & PANE_REDRAW)
567: screen_redraw_pane(c, wp);
568: }
569: }
570:
571: if (c->flags & CLIENT_STATUS)
1.9 nicm 572: screen_redraw_screen(c, 1);
1.1 nicm 573:
574: c->tty.flags |= flags;
575:
576: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
577: }
578:
579: /* Redraw client when locked. */
580: void
581: server_redraw_locked(struct client *c)
582: {
583: struct screen_write_ctx ctx;
584: struct screen screen;
1.12 nicm 585: struct grid_cell gc;
1.1 nicm 586: u_int colour, xx, yy, i;
587: int style;
588:
589: xx = c->tty.sx;
590: yy = c->tty.sy - 1;
591: if (xx == 0 || yy == 0)
592: return;
1.6 nicm 593: colour = options_get_number(&global_w_options, "clock-mode-colour");
594: style = options_get_number(&global_w_options, "clock-mode-style");
1.1 nicm 595:
1.12 nicm 596: memcpy(&gc, &grid_default_cell, sizeof gc);
597: gc.fg = colour;
598: gc.attr |= GRID_ATTR_BRIGHT;
599:
1.1 nicm 600: screen_init(&screen, xx, yy, 0);
601:
602: screen_write_start(&ctx, NULL, &screen);
603: clock_draw(&ctx, colour, style);
1.12 nicm 604:
605: if (password_failures != 0) {
606: screen_write_cursormove(&ctx, 0, 0);
607: screen_write_puts(
608: &ctx, &gc, "%u failed attempts", password_failures);
609: }
610:
1.1 nicm 611: screen_write_stop(&ctx);
612:
613: for (i = 0; i < screen_size_y(&screen); i++)
614: tty_draw_line(&c->tty, &screen, i, 0, 0);
1.9 nicm 615: screen_redraw_screen(c, 1);
1.1 nicm 616:
617: screen_free(&screen);
618: }
619:
620: /* Check for timers on client. */
621: void
622: server_check_timers(struct client *c)
623: {
624: struct session *s;
625: struct timeval tv;
626: u_int interval;
627:
628: if (c == NULL || c->session == NULL)
629: return;
630: s = c->session;
631:
632: if (gettimeofday(&tv, NULL) != 0)
633: fatal("gettimeofday");
634:
1.26 ! nicm 635: if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
! 636: server_clear_identify(c);
! 637:
1.1 nicm 638: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
639: status_message_clear(c);
640:
641: if (c->message_string != NULL || c->prompt_string != NULL) {
642: /*
643: * Don't need timed redraw for messages/prompts so bail now.
644: * The status timer isn't reset when they are redrawn anyway.
645: */
646: return;
647: }
648: if (!options_get_number(&s->options, "status"))
649: return;
650:
651: /* Check timer; resolution is only a second so don't be too clever. */
652: interval = options_get_number(&s->options, "status-interval");
653: if (interval == 0)
654: return;
655: if (tv.tv_sec < c->status_timer.tv_sec ||
656: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
657: c->flags |= CLIENT_STATUS;
658: }
659:
660: /* Fill client pollfds. */
661: void
662: server_fill_clients(struct pollfd **pfd)
663: {
664: struct client *c;
665: struct window *w;
666: struct window_pane *wp;
667: u_int i;
668:
669: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
670: c = ARRAY_ITEM(&clients, i);
671:
672: server_check_timers(c);
673: server_check_redraw(c);
674:
675: if (c == NULL)
676: (*pfd)->fd = -1;
677: else {
1.18 nicm 678: (*pfd)->fd = c->ibuf.fd;
1.16 nicm 679: if (!(c->flags & CLIENT_BAD))
1.18 nicm 680: (*pfd)->events |= POLLIN;
681: if (c->ibuf.w.queued > 0)
1.1 nicm 682: (*pfd)->events |= POLLOUT;
683: }
684: (*pfd)++;
685:
686: if (c == NULL || c->flags & CLIENT_SUSPENDED ||
687: c->tty.fd == -1 || c->session == NULL)
688: (*pfd)->fd = -1;
689: else {
690: (*pfd)->fd = c->tty.fd;
691: (*pfd)->events = POLLIN;
692: if (BUFFER_USED(c->tty.out) > 0)
693: (*pfd)->events |= POLLOUT;
694: }
695: (*pfd)++;
696: }
697:
698: /*
699: * Clear any window redraw flags (will have been redrawn as part of
700: * client).
701: */
702: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
703: w = ARRAY_ITEM(&windows, i);
704: if (w == NULL)
705: continue;
706:
707: w->flags &= ~WINDOW_REDRAW;
708: TAILQ_FOREACH(wp, &w->panes, entry)
709: wp->flags &= ~PANE_REDRAW;
710: }
711: }
712:
713: /* Handle client pollfds. */
714: void
715: server_handle_clients(struct pollfd **pfd)
716: {
717: struct client *c;
718: u_int i;
719:
720: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
721: c = ARRAY_ITEM(&clients, i);
722:
723: if (c != NULL) {
1.18 nicm 724: if ((*pfd)->revents & (POLLERR|POLLNVAL|POLLHUP)) {
1.1 nicm 725: server_lost_client(c);
726: (*pfd) += 2;
727: continue;
1.18 nicm 728: }
729:
730: if ((*pfd)->revents & POLLOUT) {
731: if (msgbuf_write(&c->ibuf.w) < 0) {
732: server_lost_client(c);
733: (*pfd) += 2;
734: continue;
735: }
736: }
737:
738: if (c->flags & CLIENT_BAD) {
739: if (c->ibuf.w.queued == 0)
1.16 nicm 740: server_lost_client(c);
741: (*pfd) += 2;
1.18 nicm 742: continue;
743: } else if ((*pfd)->revents & POLLIN) {
744: if (server_msg_dispatch(c) != 0) {
745: server_lost_client(c);
746: (*pfd) += 2;
747: continue;
748: }
749: }
1.1 nicm 750: }
751: (*pfd)++;
752:
753: if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
754: c->tty.fd != -1 && c->session != NULL) {
755: if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
756: server_lost_client(c);
757: else
758: server_handle_client(c);
759: }
760: (*pfd)++;
761: }
762: }
763:
764: /* accept(2) and create new client. */
1.13 nicm 765: void
1.1 nicm 766: server_accept_client(int srv_fd)
767: {
768: struct sockaddr_storage sa;
769: socklen_t slen = sizeof sa;
770: int fd;
771:
772: fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
773: if (fd == -1) {
774: if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
1.13 nicm 775: return;
1.1 nicm 776: fatal("accept failed");
777: }
778: if (sigterm) {
779: close(fd);
1.13 nicm 780: return;
1.1 nicm 781: }
1.13 nicm 782: server_create_client(fd);
1.1 nicm 783: }
784:
785: /* Input data from client. */
786: void
787: server_handle_client(struct client *c)
788: {
789: struct window_pane *wp;
790: struct screen *s;
791: struct timeval tv;
792: struct key_binding *bd;
793: int key, prefix, status, xtimeout;
794: int mode;
795: u_char mouse[3];
796:
797: xtimeout = options_get_number(&c->session->options, "repeat-time");
798: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
799: if (gettimeofday(&tv, NULL) != 0)
800: fatal("gettimeofday");
801: if (timercmp(&tv, &c->repeat_timer, >))
802: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
803: }
804:
805: /* Process keys. */
806: prefix = options_get_number(&c->session->options, "prefix");
807: while (tty_keys_next(&c->tty, &key, mouse) == 0) {
808: server_activity = time(NULL);
809:
810: if (c->session == NULL)
811: return;
812: wp = c->session->curw->window->active; /* could die */
813:
814: status_message_clear(c);
1.26 ! nicm 815: server_clear_identify(c);
1.1 nicm 816: if (c->prompt_string != NULL) {
817: status_prompt_key(c, key);
818: continue;
819: }
820: if (server_locked)
821: continue;
822:
823: /* Check for mouse keys. */
824: if (key == KEYC_MOUSE) {
825: window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
826: continue;
827: }
828:
829: /* No previous prefix key. */
830: if (!(c->flags & CLIENT_PREFIX)) {
831: if (key == prefix)
832: c->flags |= CLIENT_PREFIX;
1.14 nicm 833: else {
834: /* Try as a non-prefix key binding. */
835: if ((bd = key_bindings_lookup(key)) == NULL)
836: window_pane_key(wp, c, key);
837: else
838: key_bindings_dispatch(bd, c);
839: }
1.1 nicm 840: continue;
841: }
842:
843: /* Prefix key already pressed. Reset prefix and lookup key. */
844: c->flags &= ~CLIENT_PREFIX;
1.14 nicm 845: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
1.1 nicm 846: /* If repeating, treat this as a key, else ignore. */
847: if (c->flags & CLIENT_REPEAT) {
848: c->flags &= ~CLIENT_REPEAT;
849: if (key == prefix)
850: c->flags |= CLIENT_PREFIX;
851: else
852: window_pane_key(wp, c, key);
853: }
854: continue;
855: }
856:
857: /* If already repeating, but this key can't repeat, skip it. */
858: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
859: c->flags &= ~CLIENT_REPEAT;
860: if (key == prefix)
861: c->flags |= CLIENT_PREFIX;
862: else
863: window_pane_key(wp, c, key);
864: continue;
865: }
866:
867: /* If this key can repeat, reset the repeat flags and timer. */
868: if (xtimeout != 0 && bd->can_repeat) {
869: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
870:
871: tv.tv_sec = xtimeout / 1000;
872: tv.tv_usec = (xtimeout % 1000) * 1000L;
873: if (gettimeofday(&c->repeat_timer, NULL) != 0)
874: fatal("gettimeofday");
875: timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
876: }
877:
878: /* Dispatch the command. */
879: key_bindings_dispatch(bd, c);
880: }
881: if (c->session == NULL)
882: return;
883: wp = c->session->curw->window->active; /* could die - do each loop */
884: s = wp->screen;
885:
1.21 nicm 886: /*
887: * Update cursor position and mode settings. The scroll region and
888: * attributes are cleared across poll(2) as this is the most likely
889: * time a user may interrupt tmux, for example with ~^Z in ssh(1). This
890: * is a compromise between excessive resets and likelihood of an
891: * interrupt.
892: *
893: * tty_region/tty_reset/tty_update_mode already take care of not
894: * resetting things that are already in their default state.
895: */
1.1 nicm 896: status = options_get_number(&c->session->options, "status");
1.17 nicm 897: tty_region(&c->tty, 0, c->tty.sy - 1, 0);
1.11 nicm 898: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
899: tty_cursor(&c->tty, 0, 0, 0, 0);
900: else
1.1 nicm 901: tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
902:
903: mode = s->mode;
904: if (server_locked)
905: mode &= ~TTY_NOCURSOR;
906: tty_update_mode(&c->tty, mode);
1.21 nicm 907: tty_reset(&c->tty);
1.1 nicm 908: }
909:
910: /* Lost a client. */
911: void
912: server_lost_client(struct client *c)
913: {
914: u_int i;
915:
916: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
917: if (ARRAY_ITEM(&clients, i) == c)
918: ARRAY_SET(&clients, i, NULL);
919: }
1.20 nicm 920: log_debug("lost client %d", c->ibuf.fd);
1.1 nicm 921:
1.25 nicm 922: /*
923: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
924: * and tty_free might close an unrelated fd.
925: */
926: if (c->flags & CLIENT_TERMINAL)
927: tty_free(&c->tty);
1.1 nicm 928:
929: screen_free(&c->status);
930:
931: if (c->title != NULL)
932: xfree(c->title);
933:
934: if (c->message_string != NULL)
935: xfree(c->message_string);
936:
937: if (c->prompt_string != NULL)
938: xfree(c->prompt_string);
939: if (c->prompt_buffer != NULL)
940: xfree(c->prompt_buffer);
941: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
942: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
943: ARRAY_FREE(&c->prompt_hdata);
944:
945: if (c->cwd != NULL)
946: xfree(c->cwd);
947:
1.18 nicm 948: close(c->ibuf.fd);
949: imsg_clear(&c->ibuf);
1.1 nicm 950: xfree(c);
951:
952: recalculate_sizes();
953: }
954:
955: /* Handle window data. */
956: void
957: server_handle_window(struct window *w, struct window_pane *wp)
958: {
959: struct session *s;
960: u_int i;
961: int update;
962:
963: window_pane_parse(wp);
964:
965: if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
966: return;
967:
968: update = 0;
969: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
970: s = ARRAY_ITEM(&sessions, i);
971: if (s == NULL || !session_has(s, w))
972: continue;
973:
1.10 nicm 974: update += server_check_window_bell(s, w);
1.1 nicm 975: update += server_check_window_activity(s, w);
976: update += server_check_window_content(s, w, wp);
977: }
978: if (update)
979: server_status_window(w);
980:
981: w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
982: }
983:
984: int
1.10 nicm 985: server_check_window_bell(struct session *s, struct window *w)
1.1 nicm 986: {
987: struct client *c;
988: u_int i;
1.10 nicm 989: int action, visual;
1.1 nicm 990:
991: if (!(w->flags & WINDOW_BELL))
992: return (0);
993: if (session_alert_has_window(s, w, WINDOW_BELL))
994: return (0);
995: session_alert_add(s, w, WINDOW_BELL);
996:
997: action = options_get_number(&s->options, "bell-action");
998: switch (action) {
999: case BELL_ANY:
1000: if (s->flags & SESSION_UNATTACHED)
1001: break;
1.10 nicm 1002: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1003: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1004: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1005: if (c == NULL || c->session != s)
1006: continue;
1007: if (!visual) {
1.1 nicm 1008: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1009: continue;
1010: }
1011: if (c->session->curw->window == w) {
1012: status_message_set(c, "Bell in current window");
1013: continue;
1014: }
1015: status_message_set(c, "Bell in window %u",
1016: winlink_find_by_window(&s->windows, w)->idx);
1.1 nicm 1017: }
1018: break;
1019: case BELL_CURRENT:
1.10 nicm 1020: if (s->flags & SESSION_UNATTACHED)
1.1 nicm 1021: break;
1.10 nicm 1022: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1023: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1024: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1025: if (c == NULL || c->session != s)
1026: continue;
1027: if (c->session->curw->window != w)
1028: continue;
1029: if (!visual) {
1.1 nicm 1030: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1031: continue;
1032: }
1033: status_message_set(c, "Bell in current window");
1.1 nicm 1034: }
1035: break;
1036: }
1037: return (1);
1038: }
1039:
1040: int
1041: server_check_window_activity(struct session *s, struct window *w)
1042: {
1.10 nicm 1043: struct client *c;
1044: u_int i;
1045:
1.1 nicm 1046: if (!(w->flags & WINDOW_ACTIVITY))
1047: return (0);
1.10 nicm 1048:
1.1 nicm 1049: if (!options_get_number(&w->options, "monitor-activity"))
1050: return (0);
1.10 nicm 1051:
1.1 nicm 1052: if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
1053: return (0);
1.10 nicm 1054: if (s->curw->window == w)
1055: return (0);
1056:
1.1 nicm 1057: session_alert_add(s, w, WINDOW_ACTIVITY);
1.10 nicm 1058: if (s->flags & SESSION_UNATTACHED)
1059: return (0);
1060: if (options_get_number(&s->options, "visual-activity")) {
1061: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1062: c = ARRAY_ITEM(&clients, i);
1063: if (c == NULL || c->session != s)
1064: continue;
1065: status_message_set(c, "Activity in window %u",
1066: winlink_find_by_window(&s->windows, w)->idx);
1067: }
1068: }
1069:
1.1 nicm 1070: return (1);
1071: }
1072:
1073: int
1074: server_check_window_content(
1075: struct session *s, struct window *w, struct window_pane *wp)
1076: {
1.10 nicm 1077: struct client *c;
1078: u_int i;
1079: char *found, *ptr;
1080:
1081: if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
1082: return (0);
1.1 nicm 1083:
1.10 nicm 1084: ptr = options_get_string(&w->options, "monitor-content");
1085: if (ptr == NULL || *ptr == '\0')
1.1 nicm 1086: return (0);
1.10 nicm 1087:
1088: if (session_alert_has_window(s, w, WINDOW_CONTENT))
1.1 nicm 1089: return (0);
1.10 nicm 1090: if (s->curw->window == w)
1.1 nicm 1091: return (0);
1.10 nicm 1092:
1.3 nicm 1093: if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
1.1 nicm 1094: return (0);
1.10 nicm 1095: xfree(found);
1096:
1.1 nicm 1097: session_alert_add(s, w, WINDOW_CONTENT);
1.10 nicm 1098: if (s->flags & SESSION_UNATTACHED)
1099: return (0);
1100: if (options_get_number(&s->options, "visual-content")) {
1101: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1102: c = ARRAY_ITEM(&clients, i);
1103: if (c == NULL || c->session != s)
1104: continue;
1105: status_message_set(c, "Content in window %u",
1106: winlink_find_by_window(&s->windows, w)->idx);
1107: }
1108: }
1109:
1.1 nicm 1110: return (1);
1111: }
1112:
1.2 nicm 1113: /* Check if window still exists. */
1.1 nicm 1114: void
1115: server_check_window(struct window *w)
1116: {
1117: struct window_pane *wp, *wq;
1.22 nicm 1118: struct options *oo = &w->options;
1.1 nicm 1119: struct client *c;
1120: struct session *s;
1121: struct winlink *wl;
1122: u_int i, j;
1.22 nicm 1123: int destroyed;
1.1 nicm 1124:
1125: destroyed = 1;
1126:
1127: wp = TAILQ_FIRST(&w->panes);
1128: while (wp != NULL) {
1129: wq = TAILQ_NEXT(wp, entry);
1.2 nicm 1130: /*
1131: * If the pane has died and the remain-on-exit flag is not set,
1132: * remove the pane; otherwise, if the flag is set, don't allow
1133: * the window to be destroyed (or it'll close when the last
1134: * pane dies).
1135: */
1.23 nicm 1136: if (wp->fd == -1 && !options_get_number(oo, "remain-on-exit")) {
1.11 nicm 1137: layout_close_pane(wp);
1.1 nicm 1138: window_remove_pane(w, wp);
1139: server_redraw_window(w);
1.2 nicm 1140: } else
1141: destroyed = 0;
1.1 nicm 1142: wp = wq;
1143: }
1144:
1145: if (!destroyed)
1146: return;
1147:
1148: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1149: s = ARRAY_ITEM(&sessions, i);
1150: if (s == NULL)
1151: continue;
1152: if (!session_has(s, w))
1153: continue;
1154:
1155: restart:
1156: /* Detach window and either redraw or kill clients. */
1157: RB_FOREACH(wl, winlinks, &s->windows) {
1158: if (wl->window != w)
1159: continue;
1160: destroyed = session_detach(s, wl);
1161: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
1162: c = ARRAY_ITEM(&clients, j);
1163: if (c == NULL || c->session != s)
1164: continue;
1165: if (!destroyed) {
1166: server_redraw_client(c);
1167: continue;
1168: }
1169: c->session = NULL;
1170: server_write_client(c, MSG_EXIT, NULL, 0);
1171: }
1172: /* If the session was destroyed, bail now. */
1173: if (destroyed)
1174: break;
1175: goto restart;
1176: }
1177: }
1178:
1179: recalculate_sizes();
1180: }
1181:
1182: /* Call any once-per-second timers. */
1183: void
1184: server_second_timers(void)
1185: {
1186: struct window *w;
1187: struct window_pane *wp;
1188: u_int i;
1189: int xtimeout;
1190: struct tm now, then;
1191: static time_t last_t = 0;
1192: time_t t;
1193:
1194: t = time(NULL);
1.6 nicm 1195: xtimeout = options_get_number(&global_s_options, "lock-after-time");
1.1 nicm 1196: if (xtimeout > 0 && t > server_activity + xtimeout)
1197: server_lock();
1198:
1199: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
1200: w = ARRAY_ITEM(&windows, i);
1201: if (w == NULL)
1202: continue;
1203:
1204: TAILQ_FOREACH(wp, &w->panes, entry) {
1205: if (wp->mode != NULL && wp->mode->timer != NULL)
1206: wp->mode->timer(wp);
1207: }
1208: }
1209:
1210: /* Check for a minute having passed. */
1211: gmtime_r(&t, &now);
1212: gmtime_r(&last_t, &then);
1213: if (now.tm_min == then.tm_min)
1214: return;
1215: last_t = t;
1216:
1217: /* If locked, redraw all clients. */
1218: if (server_locked) {
1219: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1220: if (ARRAY_ITEM(&clients, i) != NULL)
1221: server_redraw_client(ARRAY_ITEM(&clients, i));
1222: }
1223: }
1224: }
1225:
1226: /* Update socket execute permissions based on whether sessions are attached. */
1227: int
1228: server_update_socket(void)
1229: {
1230: struct session *s;
1231: u_int i;
1232: static int last = -1;
1233: int n;
1234:
1235: n = 0;
1236: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1237: s = ARRAY_ITEM(&sessions, i);
1238: if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
1239: n++;
1240: break;
1241: }
1242: }
1243:
1244: if (n != last) {
1245: last = n;
1246: if (n != 0)
1247: chmod(socket_path, S_IRWXU);
1248: else
1249: chmod(socket_path, S_IRUSR|S_IWUSR);
1250: }
1251:
1252: return (n);
1253: }