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1.42 ! nicm 1: /* $OpenBSD: server.c,v 1.41 2009/09/23 06:18:47 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);
1.1 nicm 93:
94: ARRAY_INIT(&c->prompt_hdata);
95:
96: c->tty.fd = -1;
97: c->title = NULL;
98:
99: c->session = NULL;
100: c->tty.sx = 80;
1.37 nicm 101: c->tty.sy = 24;
1.1 nicm 102: screen_init(&c->status, c->tty.sx, 1, 0);
103:
104: c->message_string = NULL;
105:
106: c->prompt_string = NULL;
107: c->prompt_buffer = NULL;
108: c->prompt_index = 0;
109:
110: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
111: if (ARRAY_ITEM(&clients, i) == NULL) {
112: ARRAY_SET(&clients, i, c);
1.13 nicm 113: return;
1.1 nicm 114: }
115: }
116: ARRAY_ADD(&clients, c);
1.20 nicm 117: log_debug("new client %d", fd);
1.1 nicm 118: }
119:
120: /* Fork new server. */
121: int
122: server_start(char *path)
123: {
1.16 nicm 124: struct client *c;
125: int pair[2], srv_fd;
126: char *cause;
127: char rpathbuf[MAXPATHLEN];
1.1 nicm 128:
129: /* The first client is special and gets a socketpair; create it. */
130: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
131: fatal("socketpair failed");
132:
133: switch (fork()) {
134: case -1:
135: fatal("fork failed");
136: case 0:
137: break;
138: default:
139: close(pair[1]);
140: return (pair[0]);
141: }
142: close(pair[0]);
143:
144: /*
145: * Must daemonise before loading configuration as the PID changes so
146: * $TMUX would be wrong for sessions created in the config file.
147: */
1.16 nicm 148: if (daemon(1, 0) != 0)
1.1 nicm 149: fatal("daemon failed");
150:
1.16 nicm 151: logfile("server");
152: log_debug("server started, pid %ld", (long) getpid());
153:
1.1 nicm 154: ARRAY_INIT(&windows);
155: ARRAY_INIT(&clients);
1.31 nicm 156: ARRAY_INIT(&dead_clients);
1.1 nicm 157: ARRAY_INIT(&sessions);
1.31 nicm 158: ARRAY_INIT(&dead_sessions);
1.15 nicm 159: mode_key_init_trees();
1.1 nicm 160: key_bindings_init();
161: utf8_build();
162:
163: server_activity = time(NULL);
164:
165: start_time = time(NULL);
166: socket_path = path;
167:
1.16 nicm 168: if (realpath(socket_path, rpathbuf) == NULL)
169: strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
170: log_debug("socket path %s", socket_path);
171: setproctitle("server (%s)", rpathbuf);
172:
173: srv_fd = server_create_socket();
174: server_create_client(pair[1]);
175:
1.7 nicm 176: if (access(SYSTEM_CFG, R_OK) != 0) {
177: if (errno != ENOENT) {
1.16 nicm 178: xasprintf(
179: &cause, "%s: %s", strerror(errno), SYSTEM_CFG);
180: goto error;
181: }
1.24 nicm 182: } else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
1.16 nicm 183: goto error;
1.24 nicm 184: if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
1.16 nicm 185: goto error;
1.5 nicm 186:
1.16 nicm 187: exit(server_main(srv_fd));
1.1 nicm 188:
1.16 nicm 189: error:
190: /* Write the error and shutdown the server. */
191: c = ARRAY_FIRST(&clients);
1.1 nicm 192:
1.16 nicm 193: server_write_error(c, cause);
194: xfree(cause);
1.1 nicm 195:
1.27 nicm 196: sigterm = 1;
1.16 nicm 197: server_shutdown();
1.1 nicm 198:
199: exit(server_main(srv_fd));
200: }
201:
202: /* Create server socket. */
203: int
204: server_create_socket(void)
205: {
206: struct sockaddr_un sa;
207: size_t size;
208: mode_t mask;
209: int fd, mode;
210:
211: memset(&sa, 0, sizeof sa);
212: sa.sun_family = AF_UNIX;
213: size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
214: if (size >= sizeof sa.sun_path) {
215: errno = ENAMETOOLONG;
216: fatal("socket failed");
217: }
218: unlink(sa.sun_path);
219:
220: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
221: fatal("socket failed");
222:
223: mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
224: if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
225: fatal("bind failed");
226: umask(mask);
227:
228: if (listen(fd, 16) == -1)
229: fatal("listen failed");
230:
231: if ((mode = fcntl(fd, F_GETFL)) == -1)
232: fatal("fcntl failed");
233: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
234: fatal("fcntl failed");
235: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
236: fatal("fcntl failed");
237:
238: return (fd);
239: }
240:
241: /* Main server loop. */
242: int
243: server_main(int srv_fd)
244: {
245: struct window *w;
246: struct pollfd *pfds, *pfd;
247: int nfds, xtimeout;
1.42 ! nicm 248: u_int i;
1.1 nicm 249: time_t now, last;
250:
251: siginit();
1.20 nicm 252: log_debug("server socket is %d", srv_fd);
1.1 nicm 253:
254: last = time(NULL);
255:
256: pfds = NULL;
257: for (;;) {
258: /* If sigterm, kill all windows and clients. */
259: if (sigterm)
260: server_shutdown();
261:
1.42 ! nicm 262: /* Stop if no sessions or clients left. */
! 263: if (server_should_shutdown())
! 264: break;
! 265:
1.1 nicm 266: /* Handle child exit. */
267: if (sigchld) {
268: server_child_signal();
269: sigchld = 0;
270: }
271:
272: /* Recreate socket on SIGUSR1. */
273: if (sigusr1) {
274: close(srv_fd);
275: srv_fd = server_create_socket();
276: sigusr1 = 0;
277: }
278:
279: /* Initialise pollfd array. */
280: nfds = 1;
281: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
282: w = ARRAY_ITEM(&windows, i);
283: if (w != NULL)
284: nfds += window_count_panes(w);
285: }
286: nfds += ARRAY_LENGTH(&clients) * 2;
287: pfds = xrealloc(pfds, nfds, sizeof *pfds);
288: memset(pfds, 0, nfds * sizeof *pfds);
289: pfd = pfds;
290:
291: /* Fill server socket. */
292: pfd->fd = srv_fd;
293: pfd->events = POLLIN;
294: pfd++;
295:
296: /* Fill window and client sockets. */
297: server_fill_windows(&pfd);
298: server_fill_clients(&pfd);
299:
300: /* Update socket permissions. */
301: xtimeout = INFTIM;
1.27 nicm 302: if (server_update_socket() != 0)
1.1 nicm 303: xtimeout = POLL_TIMEOUT;
304:
305: /* Do the poll. */
1.4 nicm 306: if (poll(pfds, nfds, xtimeout) == -1) {
1.1 nicm 307: if (errno == EAGAIN || errno == EINTR)
308: continue;
309: fatal("poll failed");
310: }
311: pfd = pfds;
312:
313: /* Handle server socket. */
314: if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
315: fatalx("lost server socket");
316: if (pfd->revents & POLLIN) {
317: server_accept_client(srv_fd);
318: continue;
319: }
320: pfd++;
321:
322: /* Call second-based timers. */
323: now = time(NULL);
324: if (now != last) {
325: last = now;
326: server_second_timers();
327: }
328:
329: /* Set window names. */
330: set_window_names();
331:
332: /*
333: * Handle window and client sockets. Clients can create
334: * windows, so windows must come first to avoid messing up by
335: * increasing the array size.
336: */
337: server_handle_windows(&pfd);
338: server_handle_clients(&pfd);
339:
1.8 nicm 340: /* Collect any unset key bindings. */
341: key_bindings_clean();
1.31 nicm 342:
343: /* Collect dead clients and sessions. */
344: server_clean_dead();
1.1 nicm 345: }
346: if (pfds != NULL)
347: xfree(pfds);
348:
349: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
350: if (ARRAY_ITEM(&sessions, i) != NULL)
351: session_destroy(ARRAY_ITEM(&sessions, i));
352: }
353: ARRAY_FREE(&sessions);
354:
355: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
356: if (ARRAY_ITEM(&clients, i) != NULL)
357: server_lost_client(ARRAY_ITEM(&clients, i));
358: }
359: ARRAY_FREE(&clients);
360:
1.15 nicm 361: mode_key_free_trees();
1.1 nicm 362: key_bindings_free();
363:
364: close(srv_fd);
365:
366: unlink(socket_path);
367: xfree(socket_path);
368:
1.6 nicm 369: options_free(&global_s_options);
370: options_free(&global_w_options);
1.1 nicm 371:
372: return (0);
373: }
374:
375: /* Kill all clients. */
376: void
377: server_shutdown(void)
378: {
379: struct session *s;
380: struct client *c;
381: u_int i, j;
382:
1.42 ! nicm 383: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
! 384: c = ARRAY_ITEM(&clients, i);
! 385: if (c != NULL) {
! 386: if (c->flags & (CLIENT_BAD|CLIENT_SUSPENDED))
! 387: server_lost_client(c);
! 388: else
! 389: server_write_client(c, MSG_SHUTDOWN, NULL, 0);
! 390: }
! 391: }
! 392:
1.1 nicm 393: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
394: s = ARRAY_ITEM(&sessions, i);
395: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
396: c = ARRAY_ITEM(&clients, j);
397: if (c != NULL && c->session == s) {
398: s = NULL;
399: break;
400: }
401: }
402: if (s != NULL)
403: session_destroy(s);
404: }
1.42 ! nicm 405: }
! 406:
! 407: /* Check if the server should be shutting down (no more clients or windows). */
! 408: int
! 409: server_should_shutdown(void)
! 410: {
! 411: u_int i;
1.1 nicm 412:
1.42 ! nicm 413: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
! 414: if (ARRAY_ITEM(&sessions, i) != NULL)
! 415: return (0);
! 416: }
1.1 nicm 417: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1.42 ! nicm 418: if (ARRAY_ITEM(&clients, i) != NULL)
! 419: return (0);
1.1 nicm 420: }
1.42 ! nicm 421: return (1);
1.1 nicm 422: }
423:
424: /* Handle SIGCHLD. */
425: void
426: server_child_signal(void)
427: {
428: struct window *w;
429: struct window_pane *wp;
430: int status;
431: pid_t pid;
432: u_int i;
433:
434: for (;;) {
435: switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
436: case -1:
437: if (errno == ECHILD)
438: return;
1.39 nicm 439: fatal("waitpid failed");
1.1 nicm 440: case 0:
441: return;
442: }
443: if (!WIFSTOPPED(status))
444: continue;
445: if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
446: continue;
447:
448: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
449: w = ARRAY_ITEM(&windows, i);
450: if (w == NULL)
451: continue;
452: TAILQ_FOREACH(wp, &w->panes, entry) {
453: if (wp->pid == pid) {
454: if (killpg(pid, SIGCONT) != 0)
455: kill(pid, SIGCONT);
456: }
457: }
458: }
459: }
460: }
461:
462: /* Fill window pollfds. */
463: void
464: server_fill_windows(struct pollfd **pfd)
465: {
466: struct window *w;
467: struct window_pane *wp;
468: u_int i;
469:
470: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
471: w = ARRAY_ITEM(&windows, i);
472: if (w == NULL)
473: continue;
474:
475: TAILQ_FOREACH(wp, &w->panes, entry) {
476: (*pfd)->fd = wp->fd;
477: if (wp->fd != -1) {
478: (*pfd)->events = POLLIN;
479: if (BUFFER_USED(wp->out) > 0)
480: (*pfd)->events |= POLLOUT;
481: }
482: (*pfd)++;
483: }
484: }
485: }
486:
487: /* Handle window pollfds. */
488: void
489: server_handle_windows(struct pollfd **pfd)
490: {
491: struct window *w;
492: struct window_pane *wp;
493: u_int i;
494:
495: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
496: w = ARRAY_ITEM(&windows, i);
497: if (w == NULL)
498: continue;
499:
500: TAILQ_FOREACH(wp, &w->panes, entry) {
501: if (wp->fd != -1) {
502: if (buffer_poll(*pfd, wp->in, wp->out) != 0) {
503: close(wp->fd);
504: wp->fd = -1;
505: } else
506: server_handle_window(w, wp);
507: }
508: (*pfd)++;
509: }
510:
511: server_check_window(w);
512: }
513: }
514:
515: /* Check for general redraw on client. */
516: void
517: server_check_redraw(struct client *c)
518: {
519: struct session *s;
520: struct window_pane *wp;
521: int flags, redraw;
522:
523: if (c == NULL || c->session == NULL)
524: return;
525: s = c->session;
526:
527: flags = c->tty.flags & TTY_FREEZE;
528: c->tty.flags &= ~TTY_FREEZE;
529:
530: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
1.38 nicm 531: if (options_get_number(&s->options, "set-titles"))
532: server_set_title(c);
533:
1.1 nicm 534: if (c->message_string != NULL)
535: redraw = status_message_redraw(c);
536: else if (c->prompt_string != NULL)
537: redraw = status_prompt_redraw(c);
538: else
539: redraw = status_redraw(c);
540: if (!redraw)
541: c->flags &= ~CLIENT_STATUS;
542: }
543:
544: if (c->flags & CLIENT_REDRAW) {
1.41 nicm 545: screen_redraw_screen(c, 0);
1.1 nicm 546: c->flags &= ~CLIENT_STATUS;
547: } else {
548: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
549: if (wp->flags & PANE_REDRAW)
550: screen_redraw_pane(c, wp);
551: }
552: }
553:
554: if (c->flags & CLIENT_STATUS)
1.9 nicm 555: screen_redraw_screen(c, 1);
1.1 nicm 556:
557: c->tty.flags |= flags;
558:
559: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
1.38 nicm 560: }
561:
562: /* Set client title. */
563: void
564: server_set_title(struct client *c)
565: {
566: struct session *s = c->session;
567: const char *template;
568: char *title;
569:
570: template = options_get_string(&s->options, "set-titles-string");
571:
572: title = status_replace(c->session, template, time(NULL));
573: if (c->title == NULL || strcmp(title, c->title) != 0) {
574: if (c->title != NULL)
575: xfree(c->title);
576: c->title = xstrdup(title);
577: tty_set_title(&c->tty, c->title);
578: }
579: xfree(title);
1.1 nicm 580: }
581:
582: /* Check for timers on client. */
583: void
584: server_check_timers(struct client *c)
585: {
586: struct session *s;
587: struct timeval tv;
588: u_int interval;
589:
590: if (c == NULL || c->session == NULL)
591: return;
592: s = c->session;
593:
594: if (gettimeofday(&tv, NULL) != 0)
1.39 nicm 595: fatal("gettimeofday failed");
1.1 nicm 596:
1.26 nicm 597: if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
598: server_clear_identify(c);
599:
1.1 nicm 600: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
601: status_message_clear(c);
602:
603: if (c->message_string != NULL || c->prompt_string != NULL) {
604: /*
605: * Don't need timed redraw for messages/prompts so bail now.
606: * The status timer isn't reset when they are redrawn anyway.
607: */
608: return;
609: }
610: if (!options_get_number(&s->options, "status"))
611: return;
612:
613: /* Check timer; resolution is only a second so don't be too clever. */
614: interval = options_get_number(&s->options, "status-interval");
615: if (interval == 0)
616: return;
617: if (tv.tv_sec < c->status_timer.tv_sec ||
618: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
619: c->flags |= CLIENT_STATUS;
620: }
621:
622: /* Fill client pollfds. */
623: void
624: server_fill_clients(struct pollfd **pfd)
625: {
626: struct client *c;
627: struct window *w;
628: struct window_pane *wp;
629: u_int i;
630:
631: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
632: c = ARRAY_ITEM(&clients, i);
633:
634: server_check_timers(c);
635: server_check_redraw(c);
636:
637: if (c == NULL)
638: (*pfd)->fd = -1;
639: else {
1.18 nicm 640: (*pfd)->fd = c->ibuf.fd;
1.16 nicm 641: if (!(c->flags & CLIENT_BAD))
1.18 nicm 642: (*pfd)->events |= POLLIN;
643: if (c->ibuf.w.queued > 0)
1.1 nicm 644: (*pfd)->events |= POLLOUT;
645: }
646: (*pfd)++;
647:
648: if (c == NULL || c->flags & CLIENT_SUSPENDED ||
649: c->tty.fd == -1 || c->session == NULL)
650: (*pfd)->fd = -1;
651: else {
652: (*pfd)->fd = c->tty.fd;
653: (*pfd)->events = POLLIN;
654: if (BUFFER_USED(c->tty.out) > 0)
655: (*pfd)->events |= POLLOUT;
656: }
657: (*pfd)++;
658: }
659:
660: /*
661: * Clear any window redraw flags (will have been redrawn as part of
662: * client).
663: */
664: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
665: w = ARRAY_ITEM(&windows, i);
666: if (w == NULL)
667: continue;
668:
669: w->flags &= ~WINDOW_REDRAW;
670: TAILQ_FOREACH(wp, &w->panes, entry)
671: wp->flags &= ~PANE_REDRAW;
672: }
673: }
674:
675: /* Handle client pollfds. */
676: void
677: server_handle_clients(struct pollfd **pfd)
678: {
679: struct client *c;
680: u_int i;
681:
682: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
683: c = ARRAY_ITEM(&clients, i);
684:
685: if (c != NULL) {
1.18 nicm 686: if ((*pfd)->revents & (POLLERR|POLLNVAL|POLLHUP)) {
1.1 nicm 687: server_lost_client(c);
688: (*pfd) += 2;
689: continue;
1.18 nicm 690: }
691:
692: if ((*pfd)->revents & POLLOUT) {
693: if (msgbuf_write(&c->ibuf.w) < 0) {
694: server_lost_client(c);
695: (*pfd) += 2;
696: continue;
697: }
698: }
699:
700: if (c->flags & CLIENT_BAD) {
701: if (c->ibuf.w.queued == 0)
1.16 nicm 702: server_lost_client(c);
703: (*pfd) += 2;
1.18 nicm 704: continue;
705: } else if ((*pfd)->revents & POLLIN) {
706: if (server_msg_dispatch(c) != 0) {
707: server_lost_client(c);
708: (*pfd) += 2;
709: continue;
710: }
711: }
1.1 nicm 712: }
713: (*pfd)++;
714:
715: if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
716: c->tty.fd != -1 && c->session != NULL) {
717: if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
718: server_lost_client(c);
719: else
720: server_handle_client(c);
721: }
722: (*pfd)++;
723: }
724: }
725:
726: /* accept(2) and create new client. */
1.13 nicm 727: void
1.1 nicm 728: server_accept_client(int srv_fd)
729: {
730: struct sockaddr_storage sa;
731: socklen_t slen = sizeof sa;
732: int fd;
733:
734: fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
735: if (fd == -1) {
736: if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
1.13 nicm 737: return;
1.1 nicm 738: fatal("accept failed");
739: }
740: if (sigterm) {
741: close(fd);
1.13 nicm 742: return;
1.1 nicm 743: }
1.13 nicm 744: server_create_client(fd);
1.1 nicm 745: }
746:
747: /* Input data from client. */
748: void
749: server_handle_client(struct client *c)
750: {
1.32 nicm 751: struct window *w;
1.1 nicm 752: struct window_pane *wp;
753: struct screen *s;
754: struct timeval tv;
755: struct key_binding *bd;
1.40 nicm 756: struct keylist *keylist;
757: int key, status, xtimeout, mode, isprefix;
758: u_int i;
1.1 nicm 759: u_char mouse[3];
760:
761: xtimeout = options_get_number(&c->session->options, "repeat-time");
762: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
763: if (gettimeofday(&tv, NULL) != 0)
1.39 nicm 764: fatal("gettimeofday failed");
1.1 nicm 765: if (timercmp(&tv, &c->repeat_timer, >))
766: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
767: }
768:
769: /* Process keys. */
1.40 nicm 770: keylist = options_get_data(&c->session->options, "prefix");
1.1 nicm 771: while (tty_keys_next(&c->tty, &key, mouse) == 0) {
772: server_activity = time(NULL);
773:
774: if (c->session == NULL)
775: return;
1.32 nicm 776: w = c->session->curw->window;
777: wp = w->active; /* could die */
1.1 nicm 778:
1.32 nicm 779: /* Special case: number keys jump to pane in identify mode. */
780: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
781: wp = window_pane_at_index(w, key - '0');
782: if (wp != NULL && window_pane_visible(wp))
783: window_set_active_pane(w, wp);
784: server_clear_identify(c);
785: continue;
786: }
787:
1.1 nicm 788: status_message_clear(c);
1.26 nicm 789: server_clear_identify(c);
1.1 nicm 790: if (c->prompt_string != NULL) {
791: status_prompt_key(c, key);
792: continue;
793: }
794:
795: /* Check for mouse keys. */
796: if (key == KEYC_MOUSE) {
797: window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
798: continue;
799: }
800:
1.40 nicm 801: /* Is this a prefix key? */
802: isprefix = 0;
803: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
804: if (key == ARRAY_ITEM(keylist, i)) {
805: isprefix = 1;
806: break;
807: }
808: }
809:
1.1 nicm 810: /* No previous prefix key. */
811: if (!(c->flags & CLIENT_PREFIX)) {
1.40 nicm 812: if (isprefix)
1.1 nicm 813: c->flags |= CLIENT_PREFIX;
1.14 nicm 814: else {
815: /* Try as a non-prefix key binding. */
816: if ((bd = key_bindings_lookup(key)) == NULL)
817: window_pane_key(wp, c, key);
818: else
819: key_bindings_dispatch(bd, c);
820: }
1.1 nicm 821: continue;
822: }
823:
824: /* Prefix key already pressed. Reset prefix and lookup key. */
825: c->flags &= ~CLIENT_PREFIX;
1.14 nicm 826: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
1.1 nicm 827: /* If repeating, treat this as a key, else ignore. */
828: if (c->flags & CLIENT_REPEAT) {
829: c->flags &= ~CLIENT_REPEAT;
1.40 nicm 830: if (isprefix)
1.1 nicm 831: c->flags |= CLIENT_PREFIX;
832: else
833: window_pane_key(wp, c, key);
834: }
835: continue;
836: }
837:
838: /* If already repeating, but this key can't repeat, skip it. */
839: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
840: c->flags &= ~CLIENT_REPEAT;
1.40 nicm 841: if (isprefix)
1.1 nicm 842: c->flags |= CLIENT_PREFIX;
843: else
844: window_pane_key(wp, c, key);
845: continue;
846: }
847:
848: /* If this key can repeat, reset the repeat flags and timer. */
849: if (xtimeout != 0 && bd->can_repeat) {
850: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
851:
852: tv.tv_sec = xtimeout / 1000;
853: tv.tv_usec = (xtimeout % 1000) * 1000L;
854: if (gettimeofday(&c->repeat_timer, NULL) != 0)
1.39 nicm 855: fatal("gettimeofday failed");
1.1 nicm 856: timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
857: }
858:
859: /* Dispatch the command. */
860: key_bindings_dispatch(bd, c);
861: }
862: if (c->session == NULL)
863: return;
864: wp = c->session->curw->window->active; /* could die - do each loop */
865: s = wp->screen;
866:
1.21 nicm 867: /*
868: * Update cursor position and mode settings. The scroll region and
869: * attributes are cleared across poll(2) as this is the most likely
870: * time a user may interrupt tmux, for example with ~^Z in ssh(1). This
871: * is a compromise between excessive resets and likelihood of an
872: * interrupt.
873: *
874: * tty_region/tty_reset/tty_update_mode already take care of not
875: * resetting things that are already in their default state.
876: */
1.1 nicm 877: status = options_get_number(&c->session->options, "status");
1.17 nicm 878: tty_region(&c->tty, 0, c->tty.sy - 1, 0);
1.11 nicm 879: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
880: tty_cursor(&c->tty, 0, 0, 0, 0);
881: else
1.1 nicm 882: tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
883:
884: mode = s->mode;
885: tty_update_mode(&c->tty, mode);
1.21 nicm 886: tty_reset(&c->tty);
1.1 nicm 887: }
888:
889: /* Lost a client. */
890: void
891: server_lost_client(struct client *c)
892: {
893: u_int i;
894:
895: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
896: if (ARRAY_ITEM(&clients, i) == c)
897: ARRAY_SET(&clients, i, NULL);
898: }
1.20 nicm 899: log_debug("lost client %d", c->ibuf.fd);
1.1 nicm 900:
1.25 nicm 901: /*
902: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
903: * and tty_free might close an unrelated fd.
904: */
905: if (c->flags & CLIENT_TERMINAL)
906: tty_free(&c->tty);
1.1 nicm 907:
908: screen_free(&c->status);
909:
910: if (c->title != NULL)
911: xfree(c->title);
912:
913: if (c->message_string != NULL)
914: xfree(c->message_string);
915:
916: if (c->prompt_string != NULL)
917: xfree(c->prompt_string);
918: if (c->prompt_buffer != NULL)
919: xfree(c->prompt_buffer);
920: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
921: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
922: ARRAY_FREE(&c->prompt_hdata);
923:
924: if (c->cwd != NULL)
925: xfree(c->cwd);
926:
1.18 nicm 927: close(c->ibuf.fd);
928: imsg_clear(&c->ibuf);
1.31 nicm 929:
930: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
931: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
932: ARRAY_SET(&dead_clients, i, c);
933: break;
934: }
935: }
936: if (i == ARRAY_LENGTH(&dead_clients))
937: ARRAY_ADD(&dead_clients, c);
938: c->flags |= CLIENT_DEAD;
1.1 nicm 939:
940: recalculate_sizes();
1.31 nicm 941: }
942:
943: /* Free dead, unreferenced clients and sessions. */
944: void
945: server_clean_dead(void)
946: {
947: struct session *s;
948: struct client *c;
949: u_int i;
950:
951: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
952: s = ARRAY_ITEM(&dead_sessions, i);
953: if (s == NULL || s->references != 0)
954: continue;
955: ARRAY_SET(&dead_sessions, i, NULL);
956: xfree(s);
957: }
958:
959: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
960: c = ARRAY_ITEM(&dead_clients, i);
961: if (c == NULL || c->references != 0)
962: continue;
963: ARRAY_SET(&dead_clients, i, NULL);
964: xfree(c);
965: }
1.1 nicm 966: }
967:
968: /* Handle window data. */
969: void
970: server_handle_window(struct window *w, struct window_pane *wp)
971: {
972: struct session *s;
973: u_int i;
974: int update;
975:
976: window_pane_parse(wp);
977:
978: if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
979: return;
980:
981: update = 0;
982: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
983: s = ARRAY_ITEM(&sessions, i);
984: if (s == NULL || !session_has(s, w))
985: continue;
986:
1.10 nicm 987: update += server_check_window_bell(s, w);
1.1 nicm 988: update += server_check_window_activity(s, w);
989: update += server_check_window_content(s, w, wp);
990: }
991: if (update)
992: server_status_window(w);
993:
994: w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
995: }
996:
997: int
1.10 nicm 998: server_check_window_bell(struct session *s, struct window *w)
1.1 nicm 999: {
1000: struct client *c;
1001: u_int i;
1.10 nicm 1002: int action, visual;
1.1 nicm 1003:
1004: if (!(w->flags & WINDOW_BELL))
1005: return (0);
1006: if (session_alert_has_window(s, w, WINDOW_BELL))
1007: return (0);
1008: session_alert_add(s, w, WINDOW_BELL);
1009:
1010: action = options_get_number(&s->options, "bell-action");
1011: switch (action) {
1012: case BELL_ANY:
1013: if (s->flags & SESSION_UNATTACHED)
1014: break;
1.10 nicm 1015: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1016: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1017: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1018: if (c == NULL || c->session != s)
1019: continue;
1020: if (!visual) {
1.1 nicm 1021: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1022: continue;
1023: }
1024: if (c->session->curw->window == w) {
1025: status_message_set(c, "Bell in current window");
1026: continue;
1027: }
1028: status_message_set(c, "Bell in window %u",
1029: winlink_find_by_window(&s->windows, w)->idx);
1.1 nicm 1030: }
1031: break;
1032: case BELL_CURRENT:
1.10 nicm 1033: if (s->flags & SESSION_UNATTACHED)
1.1 nicm 1034: break;
1.10 nicm 1035: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1036: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1037: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1038: if (c == NULL || c->session != s)
1039: continue;
1040: if (c->session->curw->window != w)
1041: continue;
1042: if (!visual) {
1.1 nicm 1043: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1044: continue;
1045: }
1046: status_message_set(c, "Bell in current window");
1.1 nicm 1047: }
1048: break;
1049: }
1050: return (1);
1051: }
1052:
1053: int
1054: server_check_window_activity(struct session *s, struct window *w)
1055: {
1.10 nicm 1056: struct client *c;
1057: u_int i;
1058:
1.1 nicm 1059: if (!(w->flags & WINDOW_ACTIVITY))
1060: return (0);
1.10 nicm 1061:
1.1 nicm 1062: if (!options_get_number(&w->options, "monitor-activity"))
1063: return (0);
1.10 nicm 1064:
1.1 nicm 1065: if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
1066: return (0);
1.10 nicm 1067: if (s->curw->window == w)
1068: return (0);
1069:
1.1 nicm 1070: session_alert_add(s, w, WINDOW_ACTIVITY);
1.10 nicm 1071: if (s->flags & SESSION_UNATTACHED)
1072: return (0);
1073: if (options_get_number(&s->options, "visual-activity")) {
1074: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1075: c = ARRAY_ITEM(&clients, i);
1076: if (c == NULL || c->session != s)
1077: continue;
1078: status_message_set(c, "Activity in window %u",
1079: winlink_find_by_window(&s->windows, w)->idx);
1080: }
1081: }
1082:
1.1 nicm 1083: return (1);
1084: }
1085:
1086: int
1087: server_check_window_content(
1088: struct session *s, struct window *w, struct window_pane *wp)
1089: {
1.10 nicm 1090: struct client *c;
1091: u_int i;
1092: char *found, *ptr;
1093:
1094: if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
1095: return (0);
1.1 nicm 1096:
1.10 nicm 1097: ptr = options_get_string(&w->options, "monitor-content");
1098: if (ptr == NULL || *ptr == '\0')
1.1 nicm 1099: return (0);
1.10 nicm 1100:
1101: if (session_alert_has_window(s, w, WINDOW_CONTENT))
1.1 nicm 1102: return (0);
1.10 nicm 1103: if (s->curw->window == w)
1.1 nicm 1104: return (0);
1.10 nicm 1105:
1.3 nicm 1106: if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
1.1 nicm 1107: return (0);
1.10 nicm 1108: xfree(found);
1109:
1.1 nicm 1110: session_alert_add(s, w, WINDOW_CONTENT);
1.10 nicm 1111: if (s->flags & SESSION_UNATTACHED)
1112: return (0);
1113: if (options_get_number(&s->options, "visual-content")) {
1114: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1115: c = ARRAY_ITEM(&clients, i);
1116: if (c == NULL || c->session != s)
1117: continue;
1118: status_message_set(c, "Content in window %u",
1119: winlink_find_by_window(&s->windows, w)->idx);
1120: }
1121: }
1122:
1.1 nicm 1123: return (1);
1124: }
1125:
1.2 nicm 1126: /* Check if window still exists. */
1.1 nicm 1127: void
1128: server_check_window(struct window *w)
1129: {
1130: struct window_pane *wp, *wq;
1.22 nicm 1131: struct options *oo = &w->options;
1.1 nicm 1132: struct session *s;
1133: struct winlink *wl;
1.35 nicm 1134: u_int i;
1.22 nicm 1135: int destroyed;
1.1 nicm 1136:
1137: destroyed = 1;
1138:
1139: wp = TAILQ_FIRST(&w->panes);
1140: while (wp != NULL) {
1141: wq = TAILQ_NEXT(wp, entry);
1.2 nicm 1142: /*
1143: * If the pane has died and the remain-on-exit flag is not set,
1144: * remove the pane; otherwise, if the flag is set, don't allow
1145: * the window to be destroyed (or it'll close when the last
1146: * pane dies).
1147: */
1.23 nicm 1148: if (wp->fd == -1 && !options_get_number(oo, "remain-on-exit")) {
1.11 nicm 1149: layout_close_pane(wp);
1.1 nicm 1150: window_remove_pane(w, wp);
1151: server_redraw_window(w);
1.2 nicm 1152: } else
1153: destroyed = 0;
1.1 nicm 1154: wp = wq;
1155: }
1156:
1157: if (!destroyed)
1158: return;
1159:
1160: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1161: s = ARRAY_ITEM(&sessions, i);
1162: if (s == NULL)
1163: continue;
1164: if (!session_has(s, w))
1165: continue;
1166:
1167: restart:
1168: /* Detach window and either redraw or kill clients. */
1169: RB_FOREACH(wl, winlinks, &s->windows) {
1170: if (wl->window != w)
1171: continue;
1.34 nicm 1172: if (session_detach(s, wl)) {
1173: server_destroy_session(s);
1174: break;
1.1 nicm 1175: }
1.34 nicm 1176: server_redraw_session(s);
1.1 nicm 1177: goto restart;
1178: }
1179: }
1180:
1181: recalculate_sizes();
1182: }
1183:
1184: /* Call any once-per-second timers. */
1185: void
1186: server_second_timers(void)
1187: {
1188: struct window *w;
1189: struct window_pane *wp;
1190: u_int i;
1191: int xtimeout;
1192: time_t t;
1193:
1194: t = time(NULL);
1.28 nicm 1195:
1.6 nicm 1196: xtimeout = options_get_number(&global_s_options, "lock-after-time");
1.1 nicm 1197: if (xtimeout > 0 && t > server_activity + xtimeout)
1198: server_lock();
1199:
1200: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
1201: w = ARRAY_ITEM(&windows, i);
1202: if (w == NULL)
1203: continue;
1204:
1205: TAILQ_FOREACH(wp, &w->panes, entry) {
1206: if (wp->mode != NULL && wp->mode->timer != NULL)
1207: wp->mode->timer(wp);
1208: }
1209: }
1210: }
1211:
1212: /* Update socket execute permissions based on whether sessions are attached. */
1213: int
1214: server_update_socket(void)
1215: {
1216: struct session *s;
1217: u_int i;
1218: static int last = -1;
1219: int n;
1220:
1221: n = 0;
1222: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1223: s = ARRAY_ITEM(&sessions, i);
1224: if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
1225: n++;
1226: break;
1227: }
1228: }
1229:
1230: if (n != last) {
1231: last = n;
1232: if (n != 0)
1233: chmod(socket_path, S_IRWXU);
1234: else
1235: chmod(socket_path, S_IRUSR|S_IWUSR);
1236: }
1237:
1238: return (n);
1239: }