Annotation of src/usr.bin/tmux/server.c, Revision 1.16
1.16 ! nicm 1: /* $OpenBSD: server.c,v 1.15 2009/07/28 07:03:32 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);
88: c->fd = fd;
89: c->in = buffer_create(BUFSIZ);
90: c->out = buffer_create(BUFSIZ);
91:
92: ARRAY_INIT(&c->prompt_hdata);
93:
94: c->tty.fd = -1;
95: c->title = NULL;
96:
97: c->session = NULL;
98: c->tty.sx = 80;
99: c->tty.sy = 25;
100: screen_init(&c->status, c->tty.sx, 1, 0);
101:
102: c->message_string = NULL;
103:
104: c->prompt_string = NULL;
105: c->prompt_buffer = NULL;
106: c->prompt_index = 0;
107:
108: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
109: if (ARRAY_ITEM(&clients, i) == NULL) {
110: ARRAY_SET(&clients, i, c);
1.13 nicm 111: return;
1.1 nicm 112: }
113: }
114: ARRAY_ADD(&clients, c);
115: }
116:
117: /* Find client index. */
118: int
119: server_client_index(struct client *c)
120: {
121: u_int i;
122:
123: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
124: if (c == ARRAY_ITEM(&clients, i))
125: return (i);
126: }
127: return (-1);
128: }
129:
130: /* Fork new server. */
131: int
132: server_start(char *path)
133: {
1.16 ! nicm 134: struct client *c;
! 135: int pair[2], srv_fd;
! 136: char *cause;
! 137: char rpathbuf[MAXPATHLEN];
1.1 nicm 138:
139: /* The first client is special and gets a socketpair; create it. */
140: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0)
141: fatal("socketpair failed");
142:
143: switch (fork()) {
144: case -1:
145: fatal("fork failed");
146: case 0:
147: break;
148: default:
149: close(pair[1]);
150: return (pair[0]);
151: }
152: close(pair[0]);
153:
154: /*
155: * Must daemonise before loading configuration as the PID changes so
156: * $TMUX would be wrong for sessions created in the config file.
157: */
1.16 ! nicm 158: if (daemon(1, 0) != 0)
1.1 nicm 159: fatal("daemon failed");
160:
1.16 ! nicm 161: logfile("server");
! 162: log_debug("server started, pid %ld", (long) getpid());
! 163:
1.1 nicm 164: ARRAY_INIT(&windows);
165: ARRAY_INIT(&clients);
166: ARRAY_INIT(&sessions);
1.15 nicm 167: mode_key_init_trees();
1.1 nicm 168: key_bindings_init();
169: utf8_build();
170:
171: server_locked = 0;
172: server_password = NULL;
173: server_activity = time(NULL);
174:
175: start_time = time(NULL);
176: socket_path = path;
177:
1.16 ! nicm 178: if (realpath(socket_path, rpathbuf) == NULL)
! 179: strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
! 180: log_debug("socket path %s", socket_path);
! 181: setproctitle("server (%s)", rpathbuf);
! 182:
! 183: srv_fd = server_create_socket();
! 184: server_create_client(pair[1]);
! 185:
1.7 nicm 186: if (access(SYSTEM_CFG, R_OK) != 0) {
187: if (errno != ENOENT) {
1.16 ! nicm 188: xasprintf(
! 189: &cause, "%s: %s", strerror(errno), SYSTEM_CFG);
! 190: goto error;
! 191: }
! 192: } else if (load_cfg(SYSTEM_CFG, &cause) != 0)
! 193: goto error;
! 194: if (cfg_file != NULL && load_cfg(cfg_file, &cause) != 0)
! 195: goto error;
1.5 nicm 196:
1.16 ! nicm 197: exit(server_main(srv_fd));
1.1 nicm 198:
1.16 ! nicm 199: error:
! 200: /* Write the error and shutdown the server. */
! 201: c = ARRAY_FIRST(&clients);
1.1 nicm 202:
1.16 ! nicm 203: server_write_error(c, cause);
! 204: xfree(cause);
1.1 nicm 205:
1.16 ! nicm 206: server_shutdown();
! 207: c->flags |= CLIENT_BAD;
1.1 nicm 208:
209: exit(server_main(srv_fd));
210: }
211:
212: /* Create server socket. */
213: int
214: server_create_socket(void)
215: {
216: struct sockaddr_un sa;
217: size_t size;
218: mode_t mask;
219: int fd, mode;
220:
221: memset(&sa, 0, sizeof sa);
222: sa.sun_family = AF_UNIX;
223: size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
224: if (size >= sizeof sa.sun_path) {
225: errno = ENAMETOOLONG;
226: fatal("socket failed");
227: }
228: unlink(sa.sun_path);
229:
230: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
231: fatal("socket failed");
232:
233: mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
234: if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
235: fatal("bind failed");
236: umask(mask);
237:
238: if (listen(fd, 16) == -1)
239: fatal("listen failed");
240:
241: if ((mode = fcntl(fd, F_GETFL)) == -1)
242: fatal("fcntl failed");
243: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
244: fatal("fcntl failed");
245: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
246: fatal("fcntl failed");
247:
248: return (fd);
249: }
250:
251: /* Main server loop. */
252: int
253: server_main(int srv_fd)
254: {
255: struct window *w;
256: struct pollfd *pfds, *pfd;
257: int nfds, xtimeout;
258: u_int i, n;
259: time_t now, last;
260:
261: siginit();
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:
635: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
636: status_message_clear(c);
637:
638: if (c->message_string != NULL || c->prompt_string != NULL) {
639: /*
640: * Don't need timed redraw for messages/prompts so bail now.
641: * The status timer isn't reset when they are redrawn anyway.
642: */
643: return;
644: }
645: if (!options_get_number(&s->options, "status"))
646: return;
647:
648: /* Check timer; resolution is only a second so don't be too clever. */
649: interval = options_get_number(&s->options, "status-interval");
650: if (interval == 0)
651: return;
652: if (tv.tv_sec < c->status_timer.tv_sec ||
653: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
654: c->flags |= CLIENT_STATUS;
655: }
656:
657: /* Fill client pollfds. */
658: void
659: server_fill_clients(struct pollfd **pfd)
660: {
661: struct client *c;
662: struct window *w;
663: struct window_pane *wp;
664: u_int i;
665:
666: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
667: c = ARRAY_ITEM(&clients, i);
668:
669: server_check_timers(c);
670: server_check_redraw(c);
671:
672: if (c == NULL)
673: (*pfd)->fd = -1;
674: else {
675: (*pfd)->fd = c->fd;
1.16 ! nicm 676: if (!(c->flags & CLIENT_BAD))
! 677: (*pfd)->events = POLLIN;
1.1 nicm 678: if (BUFFER_USED(c->out) > 0)
679: (*pfd)->events |= POLLOUT;
680: }
681: (*pfd)++;
682:
683: if (c == NULL || c->flags & CLIENT_SUSPENDED ||
684: c->tty.fd == -1 || c->session == NULL)
685: (*pfd)->fd = -1;
686: else {
687: (*pfd)->fd = c->tty.fd;
688: (*pfd)->events = POLLIN;
689: if (BUFFER_USED(c->tty.out) > 0)
690: (*pfd)->events |= POLLOUT;
691: }
692: (*pfd)++;
693: }
694:
695: /*
696: * Clear any window redraw flags (will have been redrawn as part of
697: * client).
698: */
699: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
700: w = ARRAY_ITEM(&windows, i);
701: if (w == NULL)
702: continue;
703:
704: w->flags &= ~WINDOW_REDRAW;
705: TAILQ_FOREACH(wp, &w->panes, entry)
706: wp->flags &= ~PANE_REDRAW;
707: }
708: }
709:
710: /* Handle client pollfds. */
711: void
712: server_handle_clients(struct pollfd **pfd)
713: {
714: struct client *c;
715: u_int i;
716:
717: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
718: c = ARRAY_ITEM(&clients, i);
719:
720: if (c != NULL) {
721: if (buffer_poll(*pfd, c->in, c->out) != 0) {
722: server_lost_client(c);
723: (*pfd) += 2;
724: continue;
1.16 ! nicm 725: } else if (c->flags & CLIENT_BAD) {
! 726: if (BUFFER_USED(c->out) == 0)
! 727: server_lost_client(c);
! 728: (*pfd) += 2;
! 729: continue;
1.1 nicm 730: } else
731: server_msg_dispatch(c);
732: }
733: (*pfd)++;
734:
735: if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
736: c->tty.fd != -1 && c->session != NULL) {
737: if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
738: server_lost_client(c);
739: else
740: server_handle_client(c);
741: }
742: (*pfd)++;
743: }
744: }
745:
746: /* accept(2) and create new client. */
1.13 nicm 747: void
1.1 nicm 748: server_accept_client(int srv_fd)
749: {
750: struct sockaddr_storage sa;
751: socklen_t slen = sizeof sa;
752: int fd;
753:
754: fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
755: if (fd == -1) {
756: if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
1.13 nicm 757: return;
1.1 nicm 758: fatal("accept failed");
759: }
760: if (sigterm) {
761: close(fd);
1.13 nicm 762: return;
1.1 nicm 763: }
1.13 nicm 764: server_create_client(fd);
1.1 nicm 765: }
766:
767: /* Input data from client. */
768: void
769: server_handle_client(struct client *c)
770: {
771: struct window_pane *wp;
772: struct screen *s;
773: struct timeval tv;
774: struct key_binding *bd;
775: int key, prefix, status, xtimeout;
776: int mode;
777: u_char mouse[3];
778:
779: xtimeout = options_get_number(&c->session->options, "repeat-time");
780: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
781: if (gettimeofday(&tv, NULL) != 0)
782: fatal("gettimeofday");
783: if (timercmp(&tv, &c->repeat_timer, >))
784: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
785: }
786:
787: /* Process keys. */
788: prefix = options_get_number(&c->session->options, "prefix");
789: while (tty_keys_next(&c->tty, &key, mouse) == 0) {
790: server_activity = time(NULL);
791:
792: if (c->session == NULL)
793: return;
794: wp = c->session->curw->window->active; /* could die */
795:
796: status_message_clear(c);
797: if (c->prompt_string != NULL) {
798: status_prompt_key(c, key);
799: continue;
800: }
801: if (server_locked)
802: continue;
803:
804: /* Check for mouse keys. */
805: if (key == KEYC_MOUSE) {
806: window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
807: continue;
808: }
809:
810: /* No previous prefix key. */
811: if (!(c->flags & CLIENT_PREFIX)) {
812: if (key == prefix)
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;
830: if (key == prefix)
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;
841: if (key == prefix)
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)
855: fatal("gettimeofday");
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:
867: /* Ensure cursor position and mode settings. */
868: status = options_get_number(&c->session->options, "status");
1.11 nicm 869: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
870: tty_cursor(&c->tty, 0, 0, 0, 0);
871: else
1.1 nicm 872: tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
873:
874: mode = s->mode;
875: if (server_locked)
876: mode &= ~TTY_NOCURSOR;
877: tty_update_mode(&c->tty, mode);
878: }
879:
880: /* Lost a client. */
881: void
882: server_lost_client(struct client *c)
883: {
884: u_int i;
885:
886: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
887: if (ARRAY_ITEM(&clients, i) == c)
888: ARRAY_SET(&clients, i, NULL);
889: }
890:
891: tty_free(&c->tty, c->flags & CLIENT_SUSPENDED);
892:
893: screen_free(&c->status);
894:
895: if (c->title != NULL)
896: xfree(c->title);
897:
898: if (c->message_string != NULL)
899: xfree(c->message_string);
900:
901: if (c->prompt_string != NULL)
902: xfree(c->prompt_string);
903: if (c->prompt_buffer != NULL)
904: xfree(c->prompt_buffer);
905: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
906: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
907: ARRAY_FREE(&c->prompt_hdata);
908:
909: if (c->cwd != NULL)
910: xfree(c->cwd);
911:
912: close(c->fd);
913: buffer_destroy(c->in);
914: buffer_destroy(c->out);
915: xfree(c);
916:
917: recalculate_sizes();
918: }
919:
920: /* Handle window data. */
921: void
922: server_handle_window(struct window *w, struct window_pane *wp)
923: {
924: struct session *s;
925: u_int i;
926: int update;
927:
928: window_pane_parse(wp);
929:
930: if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
931: return;
932:
933: update = 0;
934: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
935: s = ARRAY_ITEM(&sessions, i);
936: if (s == NULL || !session_has(s, w))
937: continue;
938:
1.10 nicm 939: update += server_check_window_bell(s, w);
1.1 nicm 940: update += server_check_window_activity(s, w);
941: update += server_check_window_content(s, w, wp);
942: }
943: if (update)
944: server_status_window(w);
945:
946: w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
947: }
948:
949: int
1.10 nicm 950: server_check_window_bell(struct session *s, struct window *w)
1.1 nicm 951: {
952: struct client *c;
953: u_int i;
1.10 nicm 954: int action, visual;
1.1 nicm 955:
956: if (!(w->flags & WINDOW_BELL))
957: return (0);
958: if (session_alert_has_window(s, w, WINDOW_BELL))
959: return (0);
960: session_alert_add(s, w, WINDOW_BELL);
961:
962: action = options_get_number(&s->options, "bell-action");
963: switch (action) {
964: case BELL_ANY:
965: if (s->flags & SESSION_UNATTACHED)
966: break;
1.10 nicm 967: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 968: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
969: c = ARRAY_ITEM(&clients, i);
1.10 nicm 970: if (c == NULL || c->session != s)
971: continue;
972: if (!visual) {
1.1 nicm 973: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 974: continue;
975: }
976: if (c->session->curw->window == w) {
977: status_message_set(c, "Bell in current window");
978: continue;
979: }
980: status_message_set(c, "Bell in window %u",
981: winlink_find_by_window(&s->windows, w)->idx);
1.1 nicm 982: }
983: break;
984: case BELL_CURRENT:
1.10 nicm 985: if (s->flags & SESSION_UNATTACHED)
1.1 nicm 986: break;
1.10 nicm 987: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 988: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
989: c = ARRAY_ITEM(&clients, i);
1.10 nicm 990: if (c == NULL || c->session != s)
991: continue;
992: if (c->session->curw->window != w)
993: continue;
994: if (!visual) {
1.1 nicm 995: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 996: continue;
997: }
998: status_message_set(c, "Bell in current window");
1.1 nicm 999: }
1000: break;
1001: }
1002: return (1);
1003: }
1004:
1005: int
1006: server_check_window_activity(struct session *s, struct window *w)
1007: {
1.10 nicm 1008: struct client *c;
1009: u_int i;
1010:
1.1 nicm 1011: if (!(w->flags & WINDOW_ACTIVITY))
1012: return (0);
1.10 nicm 1013:
1.1 nicm 1014: if (!options_get_number(&w->options, "monitor-activity"))
1015: return (0);
1.10 nicm 1016:
1.1 nicm 1017: if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
1018: return (0);
1.10 nicm 1019: if (s->curw->window == w)
1020: return (0);
1021:
1.1 nicm 1022: session_alert_add(s, w, WINDOW_ACTIVITY);
1.10 nicm 1023: if (s->flags & SESSION_UNATTACHED)
1024: return (0);
1025: if (options_get_number(&s->options, "visual-activity")) {
1026: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1027: c = ARRAY_ITEM(&clients, i);
1028: if (c == NULL || c->session != s)
1029: continue;
1030: status_message_set(c, "Activity in window %u",
1031: winlink_find_by_window(&s->windows, w)->idx);
1032: }
1033: }
1034:
1.1 nicm 1035: return (1);
1036: }
1037:
1038: int
1039: server_check_window_content(
1040: struct session *s, struct window *w, struct window_pane *wp)
1041: {
1.10 nicm 1042: struct client *c;
1043: u_int i;
1044: char *found, *ptr;
1045:
1046: if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
1047: return (0);
1.1 nicm 1048:
1.10 nicm 1049: ptr = options_get_string(&w->options, "monitor-content");
1050: if (ptr == NULL || *ptr == '\0')
1.1 nicm 1051: return (0);
1.10 nicm 1052:
1053: if (session_alert_has_window(s, w, WINDOW_CONTENT))
1.1 nicm 1054: return (0);
1.10 nicm 1055: if (s->curw->window == w)
1.1 nicm 1056: return (0);
1.10 nicm 1057:
1.3 nicm 1058: if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
1.1 nicm 1059: return (0);
1.10 nicm 1060: xfree(found);
1061:
1.1 nicm 1062: session_alert_add(s, w, WINDOW_CONTENT);
1.10 nicm 1063: if (s->flags & SESSION_UNATTACHED)
1064: return (0);
1065: if (options_get_number(&s->options, "visual-content")) {
1066: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1067: c = ARRAY_ITEM(&clients, i);
1068: if (c == NULL || c->session != s)
1069: continue;
1070: status_message_set(c, "Content in window %u",
1071: winlink_find_by_window(&s->windows, w)->idx);
1072: }
1073: }
1074:
1.1 nicm 1075: return (1);
1076: }
1077:
1.2 nicm 1078: /* Check if window still exists. */
1.1 nicm 1079: void
1080: server_check_window(struct window *w)
1081: {
1082: struct window_pane *wp, *wq;
1083: struct client *c;
1084: struct session *s;
1085: struct winlink *wl;
1086: u_int i, j;
1087: int destroyed, flag;
1088:
1089: flag = options_get_number(&w->options, "remain-on-exit");
1090:
1091: destroyed = 1;
1092:
1093: wp = TAILQ_FIRST(&w->panes);
1094: while (wp != NULL) {
1095: wq = TAILQ_NEXT(wp, entry);
1.2 nicm 1096: /*
1097: * If the pane has died and the remain-on-exit flag is not set,
1098: * remove the pane; otherwise, if the flag is set, don't allow
1099: * the window to be destroyed (or it'll close when the last
1100: * pane dies).
1101: */
1102: if (wp->fd == -1 && !flag) {
1.11 nicm 1103: layout_close_pane(wp);
1.1 nicm 1104: window_remove_pane(w, wp);
1105: server_redraw_window(w);
1.2 nicm 1106: } else
1107: destroyed = 0;
1.1 nicm 1108: wp = wq;
1109: }
1110:
1111: if (!destroyed)
1112: return;
1113:
1114: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1115: s = ARRAY_ITEM(&sessions, i);
1116: if (s == NULL)
1117: continue;
1118: if (!session_has(s, w))
1119: continue;
1120:
1121: restart:
1122: /* Detach window and either redraw or kill clients. */
1123: RB_FOREACH(wl, winlinks, &s->windows) {
1124: if (wl->window != w)
1125: continue;
1126: destroyed = session_detach(s, wl);
1127: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
1128: c = ARRAY_ITEM(&clients, j);
1129: if (c == NULL || c->session != s)
1130: continue;
1131: if (!destroyed) {
1132: server_redraw_client(c);
1133: continue;
1134: }
1135: c->session = NULL;
1136: server_write_client(c, MSG_EXIT, NULL, 0);
1137: }
1138: /* If the session was destroyed, bail now. */
1139: if (destroyed)
1140: break;
1141: goto restart;
1142: }
1143: }
1144:
1145: recalculate_sizes();
1146: }
1147:
1148: /* Call any once-per-second timers. */
1149: void
1150: server_second_timers(void)
1151: {
1152: struct window *w;
1153: struct window_pane *wp;
1154: u_int i;
1155: int xtimeout;
1156: struct tm now, then;
1157: static time_t last_t = 0;
1158: time_t t;
1159:
1160: t = time(NULL);
1.6 nicm 1161: xtimeout = options_get_number(&global_s_options, "lock-after-time");
1.1 nicm 1162: if (xtimeout > 0 && t > server_activity + xtimeout)
1163: server_lock();
1164:
1165: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
1166: w = ARRAY_ITEM(&windows, i);
1167: if (w == NULL)
1168: continue;
1169:
1170: TAILQ_FOREACH(wp, &w->panes, entry) {
1171: if (wp->mode != NULL && wp->mode->timer != NULL)
1172: wp->mode->timer(wp);
1173: }
1174: }
1175:
1176: /* Check for a minute having passed. */
1177: gmtime_r(&t, &now);
1178: gmtime_r(&last_t, &then);
1179: if (now.tm_min == then.tm_min)
1180: return;
1181: last_t = t;
1182:
1183: /* If locked, redraw all clients. */
1184: if (server_locked) {
1185: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1186: if (ARRAY_ITEM(&clients, i) != NULL)
1187: server_redraw_client(ARRAY_ITEM(&clients, i));
1188: }
1189: }
1190: }
1191:
1192: /* Update socket execute permissions based on whether sessions are attached. */
1193: int
1194: server_update_socket(void)
1195: {
1196: struct session *s;
1197: u_int i;
1198: static int last = -1;
1199: int n;
1200:
1201: n = 0;
1202: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1203: s = ARRAY_ITEM(&sessions, i);
1204: if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
1205: n++;
1206: break;
1207: }
1208: }
1209:
1210: if (n != last) {
1211: last = n;
1212: if (n != 0)
1213: chmod(socket_path, S_IRWXU);
1214: else
1215: chmod(socket_path, S_IRUSR|S_IWUSR);
1216: }
1217:
1218: return (n);
1219: }