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1.44 ! nicm 1: /* $OpenBSD: server.c,v 1.43 2009/09/24 07:02:56 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;
1.31 nicm 46: struct clients dead_clients;
1.1 nicm 47:
1.13 nicm 48: void server_create_client(int);
1.1 nicm 49: int server_create_socket(void);
50: int server_main(int);
51: void server_shutdown(void);
1.42 nicm 52: int server_should_shutdown(void);
1.1 nicm 53: void server_child_signal(void);
54: void server_fill_windows(struct pollfd **);
55: void server_handle_windows(struct pollfd **);
56: void server_fill_clients(struct pollfd **);
57: void server_handle_clients(struct pollfd **);
1.13 nicm 58: void server_accept_client(int);
1.1 nicm 59: void server_handle_client(struct client *);
60: void server_handle_window(struct window *, struct window_pane *);
1.10 nicm 61: int server_check_window_bell(struct session *, struct window *);
1.1 nicm 62: int server_check_window_activity(struct session *,
63: struct window *);
64: int server_check_window_content(struct session *, struct window *,
65: struct window_pane *);
1.31 nicm 66: void server_clean_dead(void);
1.1 nicm 67: void server_lost_client(struct client *);
68: void server_check_window(struct window *);
69: void server_check_redraw(struct client *);
1.38 nicm 70: void server_set_title(struct client *);
1.1 nicm 71: void server_check_timers(struct client *);
72: void server_second_timers(void);
73: int server_update_socket(void);
74:
75: /* Create a new client. */
1.13 nicm 76: void
1.1 nicm 77: server_create_client(int fd)
78: {
79: struct client *c;
80: int mode;
81: u_int i;
82:
83: if ((mode = fcntl(fd, F_GETFL)) == -1)
84: fatal("fcntl failed");
85: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
86: fatal("fcntl failed");
87: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
88: fatal("fcntl failed");
89:
90: c = xcalloc(1, sizeof *c);
1.31 nicm 91: c->references = 0;
1.18 nicm 92: imsg_init(&c->ibuf, fd);
1.44 ! nicm 93:
! 94: if (gettimeofday(&c->tv, NULL) != 0)
! 95: fatal("gettimeofday failed");
1.1 nicm 96:
97: ARRAY_INIT(&c->prompt_hdata);
98:
99: c->tty.fd = -1;
100: c->title = NULL;
101:
102: c->session = NULL;
103: c->tty.sx = 80;
1.37 nicm 104: c->tty.sy = 24;
1.1 nicm 105: screen_init(&c->status, c->tty.sx, 1, 0);
106:
107: c->message_string = NULL;
108:
109: c->prompt_string = NULL;
110: c->prompt_buffer = NULL;
111: c->prompt_index = 0;
112:
113: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
114: if (ARRAY_ITEM(&clients, i) == NULL) {
115: ARRAY_SET(&clients, i, c);
1.13 nicm 116: return;
1.1 nicm 117: }
118: }
119: ARRAY_ADD(&clients, c);
1.20 nicm 120: log_debug("new client %d", fd);
1.1 nicm 121: }
122:
123: /* Fork new server. */
124: int
125: server_start(char *path)
126: {
1.16 nicm 127: struct client *c;
128: int pair[2], srv_fd;
129: char *cause;
130: char rpathbuf[MAXPATHLEN];
1.1 nicm 131:
132: /* The first client is special and gets a socketpair; create it. */
133: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
134: fatal("socketpair failed");
135:
136: switch (fork()) {
137: case -1:
138: fatal("fork failed");
139: case 0:
140: break;
141: default:
142: close(pair[1]);
143: return (pair[0]);
144: }
145: close(pair[0]);
146:
147: /*
148: * Must daemonise before loading configuration as the PID changes so
149: * $TMUX would be wrong for sessions created in the config file.
150: */
1.16 nicm 151: if (daemon(1, 0) != 0)
1.1 nicm 152: fatal("daemon failed");
153:
1.16 nicm 154: logfile("server");
155: log_debug("server started, pid %ld", (long) getpid());
156:
1.1 nicm 157: ARRAY_INIT(&windows);
158: ARRAY_INIT(&clients);
1.31 nicm 159: ARRAY_INIT(&dead_clients);
1.1 nicm 160: ARRAY_INIT(&sessions);
1.31 nicm 161: ARRAY_INIT(&dead_sessions);
1.15 nicm 162: mode_key_init_trees();
1.1 nicm 163: key_bindings_init();
164: utf8_build();
165:
166: server_activity = time(NULL);
167:
168: start_time = time(NULL);
169: socket_path = path;
170:
1.16 nicm 171: if (realpath(socket_path, rpathbuf) == NULL)
172: strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
173: log_debug("socket path %s", socket_path);
174: setproctitle("server (%s)", rpathbuf);
175:
176: srv_fd = server_create_socket();
177: server_create_client(pair[1]);
178:
1.7 nicm 179: if (access(SYSTEM_CFG, R_OK) != 0) {
180: if (errno != ENOENT) {
1.16 nicm 181: xasprintf(
182: &cause, "%s: %s", strerror(errno), SYSTEM_CFG);
183: goto error;
184: }
1.24 nicm 185: } else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
1.16 nicm 186: goto error;
1.24 nicm 187: if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
1.16 nicm 188: goto error;
1.5 nicm 189:
1.16 nicm 190: exit(server_main(srv_fd));
1.1 nicm 191:
1.16 nicm 192: error:
193: /* Write the error and shutdown the server. */
194: c = ARRAY_FIRST(&clients);
1.1 nicm 195:
1.16 nicm 196: server_write_error(c, cause);
197: xfree(cause);
1.1 nicm 198:
1.27 nicm 199: sigterm = 1;
1.16 nicm 200: server_shutdown();
1.1 nicm 201:
202: exit(server_main(srv_fd));
203: }
204:
205: /* Create server socket. */
206: int
207: server_create_socket(void)
208: {
209: struct sockaddr_un sa;
210: size_t size;
211: mode_t mask;
212: int fd, mode;
213:
214: memset(&sa, 0, sizeof sa);
215: sa.sun_family = AF_UNIX;
216: size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
217: if (size >= sizeof sa.sun_path) {
218: errno = ENAMETOOLONG;
219: fatal("socket failed");
220: }
221: unlink(sa.sun_path);
222:
223: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
224: fatal("socket failed");
225:
226: mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
227: if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
228: fatal("bind failed");
229: umask(mask);
230:
231: if (listen(fd, 16) == -1)
232: fatal("listen failed");
233:
234: if ((mode = fcntl(fd, F_GETFL)) == -1)
235: fatal("fcntl failed");
236: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
237: fatal("fcntl failed");
238: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
239: fatal("fcntl failed");
240:
241: return (fd);
242: }
243:
244: /* Main server loop. */
245: int
246: server_main(int srv_fd)
247: {
248: struct window *w;
249: struct pollfd *pfds, *pfd;
250: int nfds, xtimeout;
1.42 nicm 251: u_int i;
1.1 nicm 252: time_t now, last;
253:
254: siginit();
1.20 nicm 255: log_debug("server socket is %d", srv_fd);
1.1 nicm 256:
257: last = time(NULL);
258:
259: pfds = NULL;
260: for (;;) {
261: /* If sigterm, kill all windows and clients. */
262: if (sigterm)
263: server_shutdown();
264:
1.42 nicm 265: /* Stop if no sessions or clients left. */
266: if (server_should_shutdown())
267: break;
268:
1.1 nicm 269: /* Handle child exit. */
270: if (sigchld) {
271: server_child_signal();
272: sigchld = 0;
273: }
274:
275: /* Recreate socket on SIGUSR1. */
276: if (sigusr1) {
277: close(srv_fd);
278: srv_fd = server_create_socket();
279: sigusr1 = 0;
280: }
281:
282: /* Initialise pollfd array. */
283: nfds = 1;
284: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
285: w = ARRAY_ITEM(&windows, i);
286: if (w != NULL)
287: nfds += window_count_panes(w);
288: }
289: nfds += ARRAY_LENGTH(&clients) * 2;
290: pfds = xrealloc(pfds, nfds, sizeof *pfds);
291: memset(pfds, 0, nfds * sizeof *pfds);
292: pfd = pfds;
293:
294: /* Fill server socket. */
295: pfd->fd = srv_fd;
296: pfd->events = POLLIN;
297: pfd++;
298:
299: /* Fill window and client sockets. */
300: server_fill_windows(&pfd);
301: server_fill_clients(&pfd);
302:
303: /* Update socket permissions. */
304: xtimeout = INFTIM;
1.27 nicm 305: if (server_update_socket() != 0)
1.1 nicm 306: xtimeout = POLL_TIMEOUT;
307:
308: /* Do the poll. */
1.4 nicm 309: if (poll(pfds, nfds, xtimeout) == -1) {
1.1 nicm 310: if (errno == EAGAIN || errno == EINTR)
311: continue;
312: fatal("poll failed");
313: }
314: pfd = pfds;
315:
316: /* Handle server socket. */
317: if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
318: fatalx("lost server socket");
319: if (pfd->revents & POLLIN) {
320: server_accept_client(srv_fd);
321: continue;
322: }
323: pfd++;
324:
325: /* Call second-based timers. */
326: now = time(NULL);
327: if (now != last) {
328: last = now;
329: server_second_timers();
330: }
331:
332: /* Set window names. */
333: set_window_names();
334:
335: /*
336: * Handle window and client sockets. Clients can create
337: * windows, so windows must come first to avoid messing up by
338: * increasing the array size.
339: */
340: server_handle_windows(&pfd);
341: server_handle_clients(&pfd);
342:
1.8 nicm 343: /* Collect any unset key bindings. */
344: key_bindings_clean();
1.31 nicm 345:
346: /* Collect dead clients and sessions. */
347: server_clean_dead();
1.1 nicm 348: }
349: if (pfds != NULL)
350: xfree(pfds);
351:
352: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
353: if (ARRAY_ITEM(&sessions, i) != NULL)
354: session_destroy(ARRAY_ITEM(&sessions, i));
355: }
356: ARRAY_FREE(&sessions);
357:
358: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
359: if (ARRAY_ITEM(&clients, i) != NULL)
360: server_lost_client(ARRAY_ITEM(&clients, i));
361: }
362: ARRAY_FREE(&clients);
363:
1.15 nicm 364: mode_key_free_trees();
1.1 nicm 365: key_bindings_free();
366:
367: close(srv_fd);
368:
369: unlink(socket_path);
370: xfree(socket_path);
371:
1.6 nicm 372: options_free(&global_s_options);
373: options_free(&global_w_options);
1.1 nicm 374:
375: return (0);
376: }
377:
378: /* Kill all clients. */
379: void
380: server_shutdown(void)
381: {
382: struct session *s;
383: struct client *c;
384: u_int i, j;
385:
1.42 nicm 386: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
387: c = ARRAY_ITEM(&clients, i);
388: if (c != NULL) {
389: if (c->flags & (CLIENT_BAD|CLIENT_SUSPENDED))
390: server_lost_client(c);
391: else
392: server_write_client(c, MSG_SHUTDOWN, NULL, 0);
393: }
394: }
395:
1.1 nicm 396: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
397: s = ARRAY_ITEM(&sessions, i);
398: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
399: c = ARRAY_ITEM(&clients, j);
400: if (c != NULL && c->session == s) {
401: s = NULL;
402: break;
403: }
404: }
405: if (s != NULL)
406: session_destroy(s);
407: }
1.42 nicm 408: }
409:
410: /* Check if the server should be shutting down (no more clients or windows). */
411: int
412: server_should_shutdown(void)
413: {
414: u_int i;
1.1 nicm 415:
1.42 nicm 416: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
417: if (ARRAY_ITEM(&sessions, i) != NULL)
418: return (0);
419: }
1.1 nicm 420: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1.42 nicm 421: if (ARRAY_ITEM(&clients, i) != NULL)
422: return (0);
1.1 nicm 423: }
1.42 nicm 424: return (1);
1.1 nicm 425: }
426:
427: /* Handle SIGCHLD. */
428: void
429: server_child_signal(void)
430: {
431: struct window *w;
432: struct window_pane *wp;
433: int status;
434: pid_t pid;
435: u_int i;
436:
437: for (;;) {
438: switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
439: case -1:
440: if (errno == ECHILD)
441: return;
1.39 nicm 442: fatal("waitpid failed");
1.1 nicm 443: case 0:
444: return;
445: }
446: if (!WIFSTOPPED(status))
447: continue;
448: if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
449: continue;
450:
451: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
452: w = ARRAY_ITEM(&windows, i);
453: if (w == NULL)
454: continue;
455: TAILQ_FOREACH(wp, &w->panes, entry) {
456: if (wp->pid == pid) {
457: if (killpg(pid, SIGCONT) != 0)
458: kill(pid, SIGCONT);
459: }
460: }
461: }
462: }
463: }
464:
465: /* Fill window pollfds. */
466: void
467: server_fill_windows(struct pollfd **pfd)
468: {
469: struct window *w;
470: struct window_pane *wp;
471: u_int i;
472:
473: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
474: w = ARRAY_ITEM(&windows, i);
475: if (w == NULL)
476: continue;
477:
478: TAILQ_FOREACH(wp, &w->panes, entry) {
479: (*pfd)->fd = wp->fd;
480: if (wp->fd != -1) {
481: (*pfd)->events = POLLIN;
482: if (BUFFER_USED(wp->out) > 0)
483: (*pfd)->events |= POLLOUT;
484: }
485: (*pfd)++;
486: }
487: }
488: }
489:
490: /* Handle window pollfds. */
491: void
492: server_handle_windows(struct pollfd **pfd)
493: {
494: struct window *w;
495: struct window_pane *wp;
496: u_int i;
497:
498: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
499: w = ARRAY_ITEM(&windows, i);
500: if (w == NULL)
501: continue;
502:
503: TAILQ_FOREACH(wp, &w->panes, entry) {
504: if (wp->fd != -1) {
505: if (buffer_poll(*pfd, wp->in, wp->out) != 0) {
506: close(wp->fd);
507: wp->fd = -1;
508: } else
509: server_handle_window(w, wp);
510: }
511: (*pfd)++;
512: }
513:
514: server_check_window(w);
515: }
516: }
517:
518: /* Check for general redraw on client. */
519: void
520: server_check_redraw(struct client *c)
521: {
522: struct session *s;
523: struct window_pane *wp;
524: int flags, redraw;
525:
526: if (c == NULL || c->session == NULL)
527: return;
528: s = c->session;
529:
530: flags = c->tty.flags & TTY_FREEZE;
531: c->tty.flags &= ~TTY_FREEZE;
532:
533: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
1.38 nicm 534: if (options_get_number(&s->options, "set-titles"))
535: server_set_title(c);
536:
1.1 nicm 537: if (c->message_string != NULL)
538: redraw = status_message_redraw(c);
539: else if (c->prompt_string != NULL)
540: redraw = status_prompt_redraw(c);
541: else
542: redraw = status_redraw(c);
543: if (!redraw)
544: c->flags &= ~CLIENT_STATUS;
545: }
546:
547: if (c->flags & CLIENT_REDRAW) {
1.41 nicm 548: screen_redraw_screen(c, 0);
1.1 nicm 549: c->flags &= ~CLIENT_STATUS;
550: } else {
551: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
552: if (wp->flags & PANE_REDRAW)
553: screen_redraw_pane(c, wp);
554: }
555: }
556:
557: if (c->flags & CLIENT_STATUS)
1.9 nicm 558: screen_redraw_screen(c, 1);
1.1 nicm 559:
560: c->tty.flags |= flags;
561:
562: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
1.38 nicm 563: }
564:
565: /* Set client title. */
566: void
567: server_set_title(struct client *c)
568: {
569: struct session *s = c->session;
570: const char *template;
571: char *title;
572:
573: template = options_get_string(&s->options, "set-titles-string");
574:
575: title = status_replace(c->session, template, time(NULL));
576: if (c->title == NULL || strcmp(title, c->title) != 0) {
577: if (c->title != NULL)
578: xfree(c->title);
579: c->title = xstrdup(title);
580: tty_set_title(&c->tty, c->title);
581: }
582: xfree(title);
1.1 nicm 583: }
584:
585: /* Check for timers on client. */
586: void
587: server_check_timers(struct client *c)
588: {
589: struct session *s;
590: struct timeval tv;
591: u_int interval;
592:
593: if (c == NULL || c->session == NULL)
594: return;
595: s = c->session;
596:
597: if (gettimeofday(&tv, NULL) != 0)
1.39 nicm 598: fatal("gettimeofday failed");
1.1 nicm 599:
1.26 nicm 600: if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
601: server_clear_identify(c);
602:
1.1 nicm 603: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
604: status_message_clear(c);
605:
606: if (c->message_string != NULL || c->prompt_string != NULL) {
607: /*
608: * Don't need timed redraw for messages/prompts so bail now.
609: * The status timer isn't reset when they are redrawn anyway.
610: */
611: return;
612: }
613: if (!options_get_number(&s->options, "status"))
614: return;
615:
616: /* Check timer; resolution is only a second so don't be too clever. */
617: interval = options_get_number(&s->options, "status-interval");
618: if (interval == 0)
619: return;
620: if (tv.tv_sec < c->status_timer.tv_sec ||
621: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
622: c->flags |= CLIENT_STATUS;
623: }
624:
625: /* Fill client pollfds. */
626: void
627: server_fill_clients(struct pollfd **pfd)
628: {
629: struct client *c;
630: struct window *w;
631: struct window_pane *wp;
632: u_int i;
633:
634: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
635: c = ARRAY_ITEM(&clients, i);
636:
637: server_check_timers(c);
638: server_check_redraw(c);
639:
640: if (c == NULL)
641: (*pfd)->fd = -1;
642: else {
1.18 nicm 643: (*pfd)->fd = c->ibuf.fd;
1.16 nicm 644: if (!(c->flags & CLIENT_BAD))
1.18 nicm 645: (*pfd)->events |= POLLIN;
646: if (c->ibuf.w.queued > 0)
1.1 nicm 647: (*pfd)->events |= POLLOUT;
648: }
649: (*pfd)++;
650:
651: if (c == NULL || c->flags & CLIENT_SUSPENDED ||
652: c->tty.fd == -1 || c->session == NULL)
653: (*pfd)->fd = -1;
654: else {
655: (*pfd)->fd = c->tty.fd;
656: (*pfd)->events = POLLIN;
657: if (BUFFER_USED(c->tty.out) > 0)
658: (*pfd)->events |= POLLOUT;
659: }
660: (*pfd)++;
661: }
662:
663: /*
664: * Clear any window redraw flags (will have been redrawn as part of
665: * client).
666: */
667: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
668: w = ARRAY_ITEM(&windows, i);
669: if (w == NULL)
670: continue;
671:
672: w->flags &= ~WINDOW_REDRAW;
673: TAILQ_FOREACH(wp, &w->panes, entry)
674: wp->flags &= ~PANE_REDRAW;
675: }
676: }
677:
678: /* Handle client pollfds. */
679: void
680: server_handle_clients(struct pollfd **pfd)
681: {
682: struct client *c;
683: u_int i;
684:
685: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
686: c = ARRAY_ITEM(&clients, i);
687:
688: if (c != NULL) {
1.18 nicm 689: if ((*pfd)->revents & (POLLERR|POLLNVAL|POLLHUP)) {
1.1 nicm 690: server_lost_client(c);
691: (*pfd) += 2;
692: continue;
1.18 nicm 693: }
694:
695: if ((*pfd)->revents & POLLOUT) {
696: if (msgbuf_write(&c->ibuf.w) < 0) {
697: server_lost_client(c);
698: (*pfd) += 2;
699: continue;
700: }
701: }
702:
703: if (c->flags & CLIENT_BAD) {
704: if (c->ibuf.w.queued == 0)
1.16 nicm 705: server_lost_client(c);
706: (*pfd) += 2;
1.18 nicm 707: continue;
708: } else if ((*pfd)->revents & POLLIN) {
709: if (server_msg_dispatch(c) != 0) {
710: server_lost_client(c);
711: (*pfd) += 2;
712: continue;
713: }
714: }
1.1 nicm 715: }
716: (*pfd)++;
717:
718: if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
719: c->tty.fd != -1 && c->session != NULL) {
720: if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
721: server_lost_client(c);
722: else
723: server_handle_client(c);
724: }
725: (*pfd)++;
726: }
727: }
728:
729: /* accept(2) and create new client. */
1.13 nicm 730: void
1.1 nicm 731: server_accept_client(int srv_fd)
732: {
733: struct sockaddr_storage sa;
734: socklen_t slen = sizeof sa;
735: int fd;
736:
737: fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
738: if (fd == -1) {
739: if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
1.13 nicm 740: return;
1.1 nicm 741: fatal("accept failed");
742: }
743: if (sigterm) {
744: close(fd);
1.13 nicm 745: return;
1.1 nicm 746: }
1.13 nicm 747: server_create_client(fd);
1.1 nicm 748: }
749:
750: /* Input data from client. */
751: void
752: server_handle_client(struct client *c)
753: {
1.32 nicm 754: struct window *w;
1.1 nicm 755: struct window_pane *wp;
756: struct screen *s;
757: struct timeval tv;
758: struct key_binding *bd;
1.40 nicm 759: struct keylist *keylist;
760: int key, status, xtimeout, mode, isprefix;
761: u_int i;
1.1 nicm 762: u_char mouse[3];
763:
764: xtimeout = options_get_number(&c->session->options, "repeat-time");
765: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
766: if (gettimeofday(&tv, NULL) != 0)
1.39 nicm 767: fatal("gettimeofday failed");
1.1 nicm 768: if (timercmp(&tv, &c->repeat_timer, >))
769: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
770: }
771:
772: /* Process keys. */
1.40 nicm 773: keylist = options_get_data(&c->session->options, "prefix");
1.1 nicm 774: while (tty_keys_next(&c->tty, &key, mouse) == 0) {
775: server_activity = time(NULL);
776:
777: if (c->session == NULL)
778: return;
1.32 nicm 779: w = c->session->curw->window;
780: wp = w->active; /* could die */
1.1 nicm 781:
1.32 nicm 782: /* Special case: number keys jump to pane in identify mode. */
783: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
784: wp = window_pane_at_index(w, key - '0');
785: if (wp != NULL && window_pane_visible(wp))
786: window_set_active_pane(w, wp);
787: server_clear_identify(c);
788: continue;
789: }
790:
1.1 nicm 791: status_message_clear(c);
1.26 nicm 792: server_clear_identify(c);
1.1 nicm 793: if (c->prompt_string != NULL) {
794: status_prompt_key(c, key);
795: continue;
796: }
797:
798: /* Check for mouse keys. */
799: if (key == KEYC_MOUSE) {
800: window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
801: continue;
802: }
803:
1.40 nicm 804: /* Is this a prefix key? */
805: isprefix = 0;
806: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
807: if (key == ARRAY_ITEM(keylist, i)) {
808: isprefix = 1;
809: break;
810: }
811: }
812:
1.1 nicm 813: /* No previous prefix key. */
814: if (!(c->flags & CLIENT_PREFIX)) {
1.40 nicm 815: if (isprefix)
1.1 nicm 816: c->flags |= CLIENT_PREFIX;
1.14 nicm 817: else {
818: /* Try as a non-prefix key binding. */
819: if ((bd = key_bindings_lookup(key)) == NULL)
820: window_pane_key(wp, c, key);
821: else
822: key_bindings_dispatch(bd, c);
823: }
1.1 nicm 824: continue;
825: }
826:
827: /* Prefix key already pressed. Reset prefix and lookup key. */
828: c->flags &= ~CLIENT_PREFIX;
1.14 nicm 829: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
1.1 nicm 830: /* If repeating, treat this as a key, else ignore. */
831: if (c->flags & CLIENT_REPEAT) {
832: c->flags &= ~CLIENT_REPEAT;
1.40 nicm 833: if (isprefix)
1.1 nicm 834: c->flags |= CLIENT_PREFIX;
835: else
836: window_pane_key(wp, c, key);
837: }
838: continue;
839: }
840:
841: /* If already repeating, but this key can't repeat, skip it. */
842: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
843: c->flags &= ~CLIENT_REPEAT;
1.40 nicm 844: if (isprefix)
1.1 nicm 845: c->flags |= CLIENT_PREFIX;
846: else
847: window_pane_key(wp, c, key);
848: continue;
849: }
850:
851: /* If this key can repeat, reset the repeat flags and timer. */
852: if (xtimeout != 0 && bd->can_repeat) {
853: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
854:
855: tv.tv_sec = xtimeout / 1000;
856: tv.tv_usec = (xtimeout % 1000) * 1000L;
857: if (gettimeofday(&c->repeat_timer, NULL) != 0)
1.39 nicm 858: fatal("gettimeofday failed");
1.1 nicm 859: timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
860: }
861:
862: /* Dispatch the command. */
863: key_bindings_dispatch(bd, c);
864: }
865: if (c->session == NULL)
866: return;
867: wp = c->session->curw->window->active; /* could die - do each loop */
868: s = wp->screen;
869:
1.21 nicm 870: /*
871: * Update cursor position and mode settings. The scroll region and
872: * attributes are cleared across poll(2) as this is the most likely
873: * time a user may interrupt tmux, for example with ~^Z in ssh(1). This
874: * is a compromise between excessive resets and likelihood of an
875: * interrupt.
876: *
877: * tty_region/tty_reset/tty_update_mode already take care of not
878: * resetting things that are already in their default state.
879: */
1.1 nicm 880: status = options_get_number(&c->session->options, "status");
1.17 nicm 881: tty_region(&c->tty, 0, c->tty.sy - 1, 0);
1.11 nicm 882: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
883: tty_cursor(&c->tty, 0, 0, 0, 0);
884: else
1.1 nicm 885: tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
886:
887: mode = s->mode;
888: tty_update_mode(&c->tty, mode);
1.21 nicm 889: tty_reset(&c->tty);
1.1 nicm 890: }
891:
892: /* Lost a client. */
893: void
894: server_lost_client(struct client *c)
895: {
896: u_int i;
897:
898: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
899: if (ARRAY_ITEM(&clients, i) == c)
900: ARRAY_SET(&clients, i, NULL);
901: }
1.20 nicm 902: log_debug("lost client %d", c->ibuf.fd);
1.1 nicm 903:
1.25 nicm 904: /*
905: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
906: * and tty_free might close an unrelated fd.
907: */
908: if (c->flags & CLIENT_TERMINAL)
909: tty_free(&c->tty);
1.1 nicm 910:
911: screen_free(&c->status);
912:
913: if (c->title != NULL)
914: xfree(c->title);
915:
916: if (c->message_string != NULL)
917: xfree(c->message_string);
918:
919: if (c->prompt_string != NULL)
920: xfree(c->prompt_string);
921: if (c->prompt_buffer != NULL)
922: xfree(c->prompt_buffer);
923: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
924: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
925: ARRAY_FREE(&c->prompt_hdata);
926:
927: if (c->cwd != NULL)
928: xfree(c->cwd);
929:
1.18 nicm 930: close(c->ibuf.fd);
931: imsg_clear(&c->ibuf);
1.31 nicm 932:
933: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
934: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
935: ARRAY_SET(&dead_clients, i, c);
936: break;
937: }
938: }
939: if (i == ARRAY_LENGTH(&dead_clients))
940: ARRAY_ADD(&dead_clients, c);
941: c->flags |= CLIENT_DEAD;
1.1 nicm 942:
943: recalculate_sizes();
1.31 nicm 944: }
945:
946: /* Free dead, unreferenced clients and sessions. */
947: void
948: server_clean_dead(void)
949: {
950: struct session *s;
951: struct client *c;
952: u_int i;
953:
954: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
955: s = ARRAY_ITEM(&dead_sessions, i);
956: if (s == NULL || s->references != 0)
957: continue;
958: ARRAY_SET(&dead_sessions, i, NULL);
959: xfree(s);
960: }
961:
962: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
963: c = ARRAY_ITEM(&dead_clients, i);
964: if (c == NULL || c->references != 0)
965: continue;
966: ARRAY_SET(&dead_clients, i, NULL);
967: xfree(c);
968: }
1.1 nicm 969: }
970:
971: /* Handle window data. */
972: void
973: server_handle_window(struct window *w, struct window_pane *wp)
974: {
975: struct session *s;
976: u_int i;
977: int update;
978:
979: window_pane_parse(wp);
980:
981: if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
982: return;
983:
984: update = 0;
985: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
986: s = ARRAY_ITEM(&sessions, i);
987: if (s == NULL || !session_has(s, w))
988: continue;
989:
1.10 nicm 990: update += server_check_window_bell(s, w);
1.1 nicm 991: update += server_check_window_activity(s, w);
992: update += server_check_window_content(s, w, wp);
993: }
994: if (update)
995: server_status_window(w);
996:
997: w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
998: }
999:
1000: int
1.10 nicm 1001: server_check_window_bell(struct session *s, struct window *w)
1.1 nicm 1002: {
1003: struct client *c;
1004: u_int i;
1.10 nicm 1005: int action, visual;
1.1 nicm 1006:
1007: if (!(w->flags & WINDOW_BELL))
1008: return (0);
1009: if (session_alert_has_window(s, w, WINDOW_BELL))
1010: return (0);
1011: session_alert_add(s, w, WINDOW_BELL);
1012:
1013: action = options_get_number(&s->options, "bell-action");
1014: switch (action) {
1015: case BELL_ANY:
1016: if (s->flags & SESSION_UNATTACHED)
1017: break;
1.10 nicm 1018: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1019: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1020: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1021: if (c == NULL || c->session != s)
1022: continue;
1023: if (!visual) {
1.1 nicm 1024: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1025: continue;
1026: }
1027: if (c->session->curw->window == w) {
1028: status_message_set(c, "Bell in current window");
1029: continue;
1030: }
1031: status_message_set(c, "Bell in window %u",
1032: winlink_find_by_window(&s->windows, w)->idx);
1.1 nicm 1033: }
1034: break;
1035: case BELL_CURRENT:
1.10 nicm 1036: if (s->flags & SESSION_UNATTACHED)
1.1 nicm 1037: break;
1.10 nicm 1038: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1039: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1040: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1041: if (c == NULL || c->session != s)
1042: continue;
1043: if (c->session->curw->window != w)
1044: continue;
1045: if (!visual) {
1.1 nicm 1046: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1047: continue;
1048: }
1049: status_message_set(c, "Bell in current window");
1.1 nicm 1050: }
1051: break;
1052: }
1053: return (1);
1054: }
1055:
1056: int
1057: server_check_window_activity(struct session *s, struct window *w)
1058: {
1.10 nicm 1059: struct client *c;
1060: u_int i;
1061:
1.1 nicm 1062: if (!(w->flags & WINDOW_ACTIVITY))
1063: return (0);
1.10 nicm 1064:
1.1 nicm 1065: if (!options_get_number(&w->options, "monitor-activity"))
1066: return (0);
1.10 nicm 1067:
1.1 nicm 1068: if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
1069: return (0);
1.10 nicm 1070: if (s->curw->window == w)
1071: return (0);
1072:
1.1 nicm 1073: session_alert_add(s, w, WINDOW_ACTIVITY);
1.10 nicm 1074: if (s->flags & SESSION_UNATTACHED)
1075: return (0);
1076: if (options_get_number(&s->options, "visual-activity")) {
1077: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1078: c = ARRAY_ITEM(&clients, i);
1079: if (c == NULL || c->session != s)
1080: continue;
1081: status_message_set(c, "Activity in window %u",
1082: winlink_find_by_window(&s->windows, w)->idx);
1083: }
1084: }
1085:
1.1 nicm 1086: return (1);
1087: }
1088:
1089: int
1090: server_check_window_content(
1091: struct session *s, struct window *w, struct window_pane *wp)
1092: {
1.10 nicm 1093: struct client *c;
1094: u_int i;
1095: char *found, *ptr;
1096:
1097: if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
1098: return (0);
1.1 nicm 1099:
1.10 nicm 1100: ptr = options_get_string(&w->options, "monitor-content");
1101: if (ptr == NULL || *ptr == '\0')
1.1 nicm 1102: return (0);
1.10 nicm 1103:
1104: if (session_alert_has_window(s, w, WINDOW_CONTENT))
1.1 nicm 1105: return (0);
1.10 nicm 1106: if (s->curw->window == w)
1.1 nicm 1107: return (0);
1.10 nicm 1108:
1.3 nicm 1109: if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
1.1 nicm 1110: return (0);
1.10 nicm 1111: xfree(found);
1112:
1.1 nicm 1113: session_alert_add(s, w, WINDOW_CONTENT);
1.10 nicm 1114: if (s->flags & SESSION_UNATTACHED)
1115: return (0);
1116: if (options_get_number(&s->options, "visual-content")) {
1117: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1118: c = ARRAY_ITEM(&clients, i);
1119: if (c == NULL || c->session != s)
1120: continue;
1121: status_message_set(c, "Content in window %u",
1122: winlink_find_by_window(&s->windows, w)->idx);
1123: }
1124: }
1125:
1.1 nicm 1126: return (1);
1127: }
1128:
1.2 nicm 1129: /* Check if window still exists. */
1.1 nicm 1130: void
1131: server_check_window(struct window *w)
1132: {
1133: struct window_pane *wp, *wq;
1.22 nicm 1134: struct options *oo = &w->options;
1.1 nicm 1135: struct session *s;
1136: struct winlink *wl;
1.35 nicm 1137: u_int i;
1.22 nicm 1138: int destroyed;
1.1 nicm 1139:
1140: destroyed = 1;
1141:
1142: wp = TAILQ_FIRST(&w->panes);
1143: while (wp != NULL) {
1144: wq = TAILQ_NEXT(wp, entry);
1.2 nicm 1145: /*
1146: * If the pane has died and the remain-on-exit flag is not set,
1147: * remove the pane; otherwise, if the flag is set, don't allow
1148: * the window to be destroyed (or it'll close when the last
1149: * pane dies).
1150: */
1.23 nicm 1151: if (wp->fd == -1 && !options_get_number(oo, "remain-on-exit")) {
1.11 nicm 1152: layout_close_pane(wp);
1.1 nicm 1153: window_remove_pane(w, wp);
1154: server_redraw_window(w);
1.2 nicm 1155: } else
1156: destroyed = 0;
1.1 nicm 1157: wp = wq;
1158: }
1159:
1160: if (!destroyed)
1161: return;
1162:
1163: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1164: s = ARRAY_ITEM(&sessions, i);
1165: if (s == NULL)
1166: continue;
1167: if (!session_has(s, w))
1168: continue;
1169:
1170: restart:
1171: /* Detach window and either redraw or kill clients. */
1172: RB_FOREACH(wl, winlinks, &s->windows) {
1173: if (wl->window != w)
1174: continue;
1.34 nicm 1175: if (session_detach(s, wl)) {
1176: server_destroy_session(s);
1177: break;
1.1 nicm 1178: }
1.34 nicm 1179: server_redraw_session(s);
1.1 nicm 1180: goto restart;
1181: }
1182: }
1183:
1184: recalculate_sizes();
1185: }
1186:
1187: /* Call any once-per-second timers. */
1188: void
1189: server_second_timers(void)
1190: {
1191: struct window *w;
1192: struct window_pane *wp;
1193: u_int i;
1194: int xtimeout;
1195: time_t t;
1196:
1197: t = time(NULL);
1.28 nicm 1198:
1.6 nicm 1199: xtimeout = options_get_number(&global_s_options, "lock-after-time");
1.43 nicm 1200: if (xtimeout > 0 && t > server_activity + xtimeout) {
1.1 nicm 1201: server_lock();
1.43 nicm 1202: recalculate_sizes();
1203: }
1.1 nicm 1204:
1205: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
1206: w = ARRAY_ITEM(&windows, i);
1207: if (w == NULL)
1208: continue;
1209:
1210: TAILQ_FOREACH(wp, &w->panes, entry) {
1211: if (wp->mode != NULL && wp->mode->timer != NULL)
1212: wp->mode->timer(wp);
1213: }
1214: }
1215: }
1216:
1217: /* Update socket execute permissions based on whether sessions are attached. */
1218: int
1219: server_update_socket(void)
1220: {
1221: struct session *s;
1222: u_int i;
1223: static int last = -1;
1224: int n;
1225:
1226: n = 0;
1227: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1228: s = ARRAY_ITEM(&sessions, i);
1229: if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
1230: n++;
1231: break;
1232: }
1233: }
1234:
1235: if (n != last) {
1236: last = n;
1237: if (n != 0)
1238: chmod(socket_path, S_IRWXU);
1239: else
1240: chmod(socket_path, S_IRUSR|S_IWUSR);
1241: }
1242:
1243: return (n);
1244: }