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1.39 ! nicm 1: /* $OpenBSD: server.c,v 1.38 2009/09/18 15:19:27 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <sys/ioctl.h>
21: #include <sys/socket.h>
22: #include <sys/stat.h>
23: #include <sys/un.h>
24: #include <sys/wait.h>
25:
26: #include <errno.h>
27: #include <fcntl.h>
1.5 nicm 28: #include <paths.h>
1.1 nicm 29: #include <signal.h>
30: #include <stdio.h>
31: #include <stdlib.h>
32: #include <string.h>
33: #include <syslog.h>
34: #include <termios.h>
35: #include <time.h>
36: #include <unistd.h>
37:
38: #include "tmux.h"
39:
40: /*
41: * Main server functions.
42: */
43:
44: /* Client list. */
45: struct clients clients;
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);
52: void server_child_signal(void);
53: void server_fill_windows(struct pollfd **);
54: void server_handle_windows(struct pollfd **);
55: void server_fill_clients(struct pollfd **);
56: void server_handle_clients(struct pollfd **);
1.13 nicm 57: void server_accept_client(int);
1.1 nicm 58: void server_handle_client(struct client *);
59: void server_handle_window(struct window *, struct window_pane *);
1.10 nicm 60: int server_check_window_bell(struct session *, struct window *);
1.1 nicm 61: int server_check_window_activity(struct session *,
62: struct window *);
63: int server_check_window_content(struct session *, struct window *,
64: struct window_pane *);
1.31 nicm 65: void server_clean_dead(void);
1.1 nicm 66: void server_lost_client(struct client *);
67: void server_check_window(struct window *);
68: void server_check_redraw(struct client *);
1.38 nicm 69: void server_set_title(struct client *);
1.1 nicm 70: void server_redraw_locked(struct client *);
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_locked = 0;
164: server_password = NULL;
165: server_activity = time(NULL);
166:
167: start_time = time(NULL);
168: socket_path = path;
169:
1.16 nicm 170: if (realpath(socket_path, rpathbuf) == NULL)
171: strlcpy(rpathbuf, socket_path, sizeof rpathbuf);
172: log_debug("socket path %s", socket_path);
173: setproctitle("server (%s)", rpathbuf);
174:
175: srv_fd = server_create_socket();
176: server_create_client(pair[1]);
177:
1.7 nicm 178: if (access(SYSTEM_CFG, R_OK) != 0) {
179: if (errno != ENOENT) {
1.16 nicm 180: xasprintf(
181: &cause, "%s: %s", strerror(errno), SYSTEM_CFG);
182: goto error;
183: }
1.24 nicm 184: } else if (load_cfg(SYSTEM_CFG, NULL, &cause) != 0)
1.16 nicm 185: goto error;
1.24 nicm 186: if (cfg_file != NULL && load_cfg(cfg_file, NULL, &cause) != 0)
1.16 nicm 187: goto error;
1.5 nicm 188:
1.16 nicm 189: exit(server_main(srv_fd));
1.1 nicm 190:
1.16 nicm 191: error:
192: /* Write the error and shutdown the server. */
193: c = ARRAY_FIRST(&clients);
1.1 nicm 194:
1.16 nicm 195: server_write_error(c, cause);
196: xfree(cause);
1.1 nicm 197:
1.27 nicm 198: sigterm = 1;
1.16 nicm 199: server_shutdown();
1.1 nicm 200:
201: exit(server_main(srv_fd));
202: }
203:
204: /* Create server socket. */
205: int
206: server_create_socket(void)
207: {
208: struct sockaddr_un sa;
209: size_t size;
210: mode_t mask;
211: int fd, mode;
212:
213: memset(&sa, 0, sizeof sa);
214: sa.sun_family = AF_UNIX;
215: size = strlcpy(sa.sun_path, socket_path, sizeof sa.sun_path);
216: if (size >= sizeof sa.sun_path) {
217: errno = ENAMETOOLONG;
218: fatal("socket failed");
219: }
220: unlink(sa.sun_path);
221:
222: if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
223: fatal("socket failed");
224:
225: mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
226: if (bind(fd, (struct sockaddr *) &sa, SUN_LEN(&sa)) == -1)
227: fatal("bind failed");
228: umask(mask);
229:
230: if (listen(fd, 16) == -1)
231: fatal("listen failed");
232:
233: if ((mode = fcntl(fd, F_GETFL)) == -1)
234: fatal("fcntl failed");
235: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
236: fatal("fcntl failed");
237: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
238: fatal("fcntl failed");
239:
240: return (fd);
241: }
242:
243: /* Main server loop. */
244: int
245: server_main(int srv_fd)
246: {
247: struct window *w;
248: struct pollfd *pfds, *pfd;
249: int nfds, xtimeout;
250: u_int i, n;
251: time_t now, last;
252:
253: siginit();
1.20 nicm 254: log_debug("server socket is %d", srv_fd);
1.1 nicm 255:
256: last = time(NULL);
257:
258: pfds = NULL;
259: for (;;) {
260: /* If sigterm, kill all windows and clients. */
261: if (sigterm)
262: server_shutdown();
263:
264: /* Handle child exit. */
265: if (sigchld) {
266: server_child_signal();
267: sigchld = 0;
268: }
269:
270: /* Recreate socket on SIGUSR1. */
271: if (sigusr1) {
272: close(srv_fd);
273: srv_fd = server_create_socket();
274: sigusr1 = 0;
275: }
276:
277: /* Initialise pollfd array. */
278: nfds = 1;
279: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
280: w = ARRAY_ITEM(&windows, i);
281: if (w != NULL)
282: nfds += window_count_panes(w);
283: }
284: nfds += ARRAY_LENGTH(&clients) * 2;
285: pfds = xrealloc(pfds, nfds, sizeof *pfds);
286: memset(pfds, 0, nfds * sizeof *pfds);
287: pfd = pfds;
288:
289: /* Fill server socket. */
290: pfd->fd = srv_fd;
291: pfd->events = POLLIN;
292: pfd++;
293:
294: /* Fill window and client sockets. */
295: server_fill_windows(&pfd);
296: server_fill_clients(&pfd);
297:
298: /* Update socket permissions. */
299: xtimeout = INFTIM;
1.27 nicm 300: if (server_update_socket() != 0)
1.1 nicm 301: xtimeout = POLL_TIMEOUT;
302:
303: /* Do the poll. */
1.4 nicm 304: if (poll(pfds, nfds, xtimeout) == -1) {
1.1 nicm 305: if (errno == EAGAIN || errno == EINTR)
306: continue;
307: fatal("poll failed");
308: }
309: pfd = pfds;
310:
311: /* Handle server socket. */
312: if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
313: fatalx("lost server socket");
314: if (pfd->revents & POLLIN) {
315: server_accept_client(srv_fd);
316: continue;
317: }
318: pfd++;
319:
320: /* Call second-based timers. */
321: now = time(NULL);
322: if (now != last) {
323: last = now;
324: server_second_timers();
325: }
326:
327: /* Set window names. */
328: set_window_names();
329:
330: /*
331: * Handle window and client sockets. Clients can create
332: * windows, so windows must come first to avoid messing up by
333: * increasing the array size.
334: */
335: server_handle_windows(&pfd);
336: server_handle_clients(&pfd);
337:
1.8 nicm 338: /* Collect any unset key bindings. */
339: key_bindings_clean();
1.31 nicm 340:
341: /* Collect dead clients and sessions. */
342: server_clean_dead();
1.8 nicm 343:
1.1 nicm 344: /*
345: * If we have no sessions and clients left, let's get out
346: * of here...
347: */
348: n = 0;
349: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
350: if (ARRAY_ITEM(&sessions, i) != NULL)
351: n++;
352: }
353: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
354: if (ARRAY_ITEM(&clients, i) != NULL)
355: n++;
356: }
357: if (n == 0)
358: break;
359: }
360: if (pfds != NULL)
361: xfree(pfds);
362:
363: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
364: if (ARRAY_ITEM(&sessions, i) != NULL)
365: session_destroy(ARRAY_ITEM(&sessions, i));
366: }
367: ARRAY_FREE(&sessions);
368:
369: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
370: if (ARRAY_ITEM(&clients, i) != NULL)
371: server_lost_client(ARRAY_ITEM(&clients, i));
372: }
373: ARRAY_FREE(&clients);
374:
1.15 nicm 375: mode_key_free_trees();
1.1 nicm 376: key_bindings_free();
377:
378: close(srv_fd);
379:
380: unlink(socket_path);
381: xfree(socket_path);
382:
1.6 nicm 383: options_free(&global_s_options);
384: options_free(&global_w_options);
1.1 nicm 385: if (server_password != NULL)
386: xfree(server_password);
387:
388: return (0);
389: }
390:
391: /* Kill all clients. */
392: void
393: server_shutdown(void)
394: {
395: struct session *s;
396: struct client *c;
397: u_int i, j;
398:
399: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
400: s = ARRAY_ITEM(&sessions, i);
401: for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
402: c = ARRAY_ITEM(&clients, j);
403: if (c != NULL && c->session == s) {
404: s = NULL;
405: break;
406: }
407: }
408: if (s != NULL)
409: session_destroy(s);
410: }
411:
412: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
413: c = ARRAY_ITEM(&clients, i);
1.16 nicm 414: if (c != NULL) {
415: if (c->flags & CLIENT_BAD)
416: server_lost_client(c);
417: else
418: server_write_client(c, MSG_SHUTDOWN, NULL, 0);
419: }
1.1 nicm 420: }
421: }
422:
423: /* Handle SIGCHLD. */
424: void
425: server_child_signal(void)
426: {
427: struct window *w;
428: struct window_pane *wp;
429: int status;
430: pid_t pid;
431: u_int i;
432:
433: for (;;) {
434: switch (pid = waitpid(WAIT_ANY, &status, WNOHANG|WUNTRACED)) {
435: case -1:
436: if (errno == ECHILD)
437: return;
1.39 ! nicm 438: fatal("waitpid failed");
1.1 nicm 439: case 0:
440: return;
441: }
442: if (!WIFSTOPPED(status))
443: continue;
444: if (WSTOPSIG(status) == SIGTTIN || WSTOPSIG(status) == SIGTTOU)
445: continue;
446:
447: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
448: w = ARRAY_ITEM(&windows, i);
449: if (w == NULL)
450: continue;
451: TAILQ_FOREACH(wp, &w->panes, entry) {
452: if (wp->pid == pid) {
453: if (killpg(pid, SIGCONT) != 0)
454: kill(pid, SIGCONT);
455: }
456: }
457: }
458: }
459: }
460:
461: /* Fill window pollfds. */
462: void
463: server_fill_windows(struct pollfd **pfd)
464: {
465: struct window *w;
466: struct window_pane *wp;
467: u_int i;
468:
469: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
470: w = ARRAY_ITEM(&windows, i);
471: if (w == NULL)
472: continue;
473:
474: TAILQ_FOREACH(wp, &w->panes, entry) {
475: (*pfd)->fd = wp->fd;
476: if (wp->fd != -1) {
477: (*pfd)->events = POLLIN;
478: if (BUFFER_USED(wp->out) > 0)
479: (*pfd)->events |= POLLOUT;
480: }
481: (*pfd)++;
482: }
483: }
484: }
485:
486: /* Handle window pollfds. */
487: void
488: server_handle_windows(struct pollfd **pfd)
489: {
490: struct window *w;
491: struct window_pane *wp;
492: u_int i;
493:
494: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
495: w = ARRAY_ITEM(&windows, i);
496: if (w == NULL)
497: continue;
498:
499: TAILQ_FOREACH(wp, &w->panes, entry) {
500: if (wp->fd != -1) {
501: if (buffer_poll(*pfd, wp->in, wp->out) != 0) {
502: close(wp->fd);
503: wp->fd = -1;
504: } else
505: server_handle_window(w, wp);
506: }
507: (*pfd)++;
508: }
509:
510: server_check_window(w);
511: }
512: }
513:
514: /* Check for general redraw on client. */
515: void
516: server_check_redraw(struct client *c)
517: {
518: struct session *s;
519: struct window_pane *wp;
520: int flags, redraw;
521:
522: if (c == NULL || c->session == NULL)
523: return;
524: s = c->session;
525:
526: flags = c->tty.flags & TTY_FREEZE;
527: c->tty.flags &= ~TTY_FREEZE;
528:
529: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
1.38 nicm 530: if (options_get_number(&s->options, "set-titles"))
531: server_set_title(c);
532:
1.1 nicm 533: if (c->message_string != NULL)
534: redraw = status_message_redraw(c);
535: else if (c->prompt_string != NULL)
536: redraw = status_prompt_redraw(c);
537: else
538: redraw = status_redraw(c);
539: if (!redraw)
540: c->flags &= ~CLIENT_STATUS;
541: }
542:
543: if (c->flags & CLIENT_REDRAW) {
544: if (server_locked)
545: server_redraw_locked(c);
546: else
1.9 nicm 547: screen_redraw_screen(c, 0);
1.1 nicm 548: c->flags &= ~CLIENT_STATUS;
549: } else {
550: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
551: if (wp->flags & PANE_REDRAW)
552: screen_redraw_pane(c, wp);
553: }
554: }
555:
556: if (c->flags & CLIENT_STATUS)
1.9 nicm 557: screen_redraw_screen(c, 1);
1.1 nicm 558:
559: c->tty.flags |= flags;
560:
561: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
1.38 nicm 562: }
563:
564: /* Set client title. */
565: void
566: server_set_title(struct client *c)
567: {
568: struct session *s = c->session;
569: const char *template;
570: char *title;
571:
572: template = options_get_string(&s->options, "set-titles-string");
573:
574: title = status_replace(c->session, template, time(NULL));
575: if (c->title == NULL || strcmp(title, c->title) != 0) {
576: if (c->title != NULL)
577: xfree(c->title);
578: c->title = xstrdup(title);
579: tty_set_title(&c->tty, c->title);
580: }
581: xfree(title);
1.1 nicm 582: }
583:
584: /* Redraw client when locked. */
585: void
586: server_redraw_locked(struct client *c)
587: {
588: struct screen_write_ctx ctx;
589: struct screen screen;
1.12 nicm 590: struct grid_cell gc;
1.1 nicm 591: u_int colour, xx, yy, i;
592: int style;
593:
594: xx = c->tty.sx;
595: yy = c->tty.sy - 1;
596: if (xx == 0 || yy == 0)
597: return;
1.6 nicm 598: colour = options_get_number(&global_w_options, "clock-mode-colour");
599: style = options_get_number(&global_w_options, "clock-mode-style");
1.1 nicm 600:
1.12 nicm 601: memcpy(&gc, &grid_default_cell, sizeof gc);
1.33 nicm 602: colour_set_fg(&gc, colour);
1.12 nicm 603: gc.attr |= GRID_ATTR_BRIGHT;
604:
1.1 nicm 605: screen_init(&screen, xx, yy, 0);
606:
607: screen_write_start(&ctx, NULL, &screen);
608: clock_draw(&ctx, colour, style);
1.12 nicm 609:
610: if (password_failures != 0) {
611: screen_write_cursormove(&ctx, 0, 0);
612: screen_write_puts(
613: &ctx, &gc, "%u failed attempts", password_failures);
1.28 nicm 614: if (time(NULL) < password_backoff)
615: screen_write_puts(&ctx, &gc, "; sleeping");
1.12 nicm 616: }
617:
1.1 nicm 618: screen_write_stop(&ctx);
619:
620: for (i = 0; i < screen_size_y(&screen); i++)
621: tty_draw_line(&c->tty, &screen, i, 0, 0);
1.9 nicm 622: screen_redraw_screen(c, 1);
1.1 nicm 623:
624: screen_free(&screen);
625: }
626:
627: /* Check for timers on client. */
628: void
629: server_check_timers(struct client *c)
630: {
631: struct session *s;
632: struct timeval tv;
633: u_int interval;
634:
635: if (c == NULL || c->session == NULL)
636: return;
637: s = c->session;
638:
639: if (gettimeofday(&tv, NULL) != 0)
1.39 ! nicm 640: fatal("gettimeofday failed");
1.1 nicm 641:
1.26 nicm 642: if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
643: server_clear_identify(c);
644:
1.1 nicm 645: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
646: status_message_clear(c);
647:
648: if (c->message_string != NULL || c->prompt_string != NULL) {
649: /*
650: * Don't need timed redraw for messages/prompts so bail now.
651: * The status timer isn't reset when they are redrawn anyway.
652: */
653: return;
654: }
655: if (!options_get_number(&s->options, "status"))
656: return;
657:
658: /* Check timer; resolution is only a second so don't be too clever. */
659: interval = options_get_number(&s->options, "status-interval");
660: if (interval == 0)
661: return;
662: if (tv.tv_sec < c->status_timer.tv_sec ||
663: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval)
664: c->flags |= CLIENT_STATUS;
665: }
666:
667: /* Fill client pollfds. */
668: void
669: server_fill_clients(struct pollfd **pfd)
670: {
671: struct client *c;
672: struct window *w;
673: struct window_pane *wp;
674: u_int i;
675:
676: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
677: c = ARRAY_ITEM(&clients, i);
678:
679: server_check_timers(c);
680: server_check_redraw(c);
681:
682: if (c == NULL)
683: (*pfd)->fd = -1;
684: else {
1.18 nicm 685: (*pfd)->fd = c->ibuf.fd;
1.16 nicm 686: if (!(c->flags & CLIENT_BAD))
1.18 nicm 687: (*pfd)->events |= POLLIN;
688: if (c->ibuf.w.queued > 0)
1.1 nicm 689: (*pfd)->events |= POLLOUT;
690: }
691: (*pfd)++;
692:
693: if (c == NULL || c->flags & CLIENT_SUSPENDED ||
694: c->tty.fd == -1 || c->session == NULL)
695: (*pfd)->fd = -1;
696: else {
697: (*pfd)->fd = c->tty.fd;
698: (*pfd)->events = POLLIN;
699: if (BUFFER_USED(c->tty.out) > 0)
700: (*pfd)->events |= POLLOUT;
701: }
702: (*pfd)++;
703: }
704:
705: /*
706: * Clear any window redraw flags (will have been redrawn as part of
707: * client).
708: */
709: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
710: w = ARRAY_ITEM(&windows, i);
711: if (w == NULL)
712: continue;
713:
714: w->flags &= ~WINDOW_REDRAW;
715: TAILQ_FOREACH(wp, &w->panes, entry)
716: wp->flags &= ~PANE_REDRAW;
717: }
718: }
719:
720: /* Handle client pollfds. */
721: void
722: server_handle_clients(struct pollfd **pfd)
723: {
724: struct client *c;
725: u_int i;
726:
727: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
728: c = ARRAY_ITEM(&clients, i);
729:
730: if (c != NULL) {
1.18 nicm 731: if ((*pfd)->revents & (POLLERR|POLLNVAL|POLLHUP)) {
1.1 nicm 732: server_lost_client(c);
733: (*pfd) += 2;
734: continue;
1.18 nicm 735: }
736:
737: if ((*pfd)->revents & POLLOUT) {
738: if (msgbuf_write(&c->ibuf.w) < 0) {
739: server_lost_client(c);
740: (*pfd) += 2;
741: continue;
742: }
743: }
744:
745: if (c->flags & CLIENT_BAD) {
746: if (c->ibuf.w.queued == 0)
1.16 nicm 747: server_lost_client(c);
748: (*pfd) += 2;
1.18 nicm 749: continue;
750: } else if ((*pfd)->revents & POLLIN) {
751: if (server_msg_dispatch(c) != 0) {
752: server_lost_client(c);
753: (*pfd) += 2;
754: continue;
755: }
756: }
1.1 nicm 757: }
758: (*pfd)++;
759:
760: if (c != NULL && !(c->flags & CLIENT_SUSPENDED) &&
761: c->tty.fd != -1 && c->session != NULL) {
762: if (buffer_poll(*pfd, c->tty.in, c->tty.out) != 0)
763: server_lost_client(c);
764: else
765: server_handle_client(c);
766: }
767: (*pfd)++;
768: }
769: }
770:
771: /* accept(2) and create new client. */
1.13 nicm 772: void
1.1 nicm 773: server_accept_client(int srv_fd)
774: {
775: struct sockaddr_storage sa;
776: socklen_t slen = sizeof sa;
777: int fd;
778:
779: fd = accept(srv_fd, (struct sockaddr *) &sa, &slen);
780: if (fd == -1) {
781: if (errno == EAGAIN || errno == EINTR || errno == ECONNABORTED)
1.13 nicm 782: return;
1.1 nicm 783: fatal("accept failed");
784: }
785: if (sigterm) {
786: close(fd);
1.13 nicm 787: return;
1.1 nicm 788: }
1.13 nicm 789: server_create_client(fd);
1.1 nicm 790: }
791:
792: /* Input data from client. */
793: void
794: server_handle_client(struct client *c)
795: {
1.32 nicm 796: struct window *w;
1.1 nicm 797: struct window_pane *wp;
798: struct screen *s;
799: struct timeval tv;
800: struct key_binding *bd;
801: int key, prefix, status, xtimeout;
802: int mode;
803: u_char mouse[3];
804:
805: xtimeout = options_get_number(&c->session->options, "repeat-time");
806: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
807: if (gettimeofday(&tv, NULL) != 0)
1.39 ! nicm 808: fatal("gettimeofday failed");
1.1 nicm 809: if (timercmp(&tv, &c->repeat_timer, >))
810: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
811: }
812:
813: /* Process keys. */
814: prefix = options_get_number(&c->session->options, "prefix");
815: while (tty_keys_next(&c->tty, &key, mouse) == 0) {
816: server_activity = time(NULL);
817:
818: if (c->session == NULL)
819: return;
1.32 nicm 820: w = c->session->curw->window;
821: wp = w->active; /* could die */
1.1 nicm 822:
1.32 nicm 823: /* Special case: number keys jump to pane in identify mode. */
824: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
825: wp = window_pane_at_index(w, key - '0');
826: if (wp != NULL && window_pane_visible(wp))
827: window_set_active_pane(w, wp);
828: server_clear_identify(c);
829: continue;
830: }
831:
1.1 nicm 832: status_message_clear(c);
1.26 nicm 833: server_clear_identify(c);
1.1 nicm 834: if (c->prompt_string != NULL) {
835: status_prompt_key(c, key);
836: continue;
837: }
838: if (server_locked)
839: continue;
840:
841: /* Check for mouse keys. */
842: if (key == KEYC_MOUSE) {
843: window_pane_mouse(wp, c, mouse[0], mouse[1], mouse[2]);
844: continue;
845: }
846:
847: /* No previous prefix key. */
848: if (!(c->flags & CLIENT_PREFIX)) {
849: if (key == prefix)
850: c->flags |= CLIENT_PREFIX;
1.14 nicm 851: else {
852: /* Try as a non-prefix key binding. */
853: if ((bd = key_bindings_lookup(key)) == NULL)
854: window_pane_key(wp, c, key);
855: else
856: key_bindings_dispatch(bd, c);
857: }
1.1 nicm 858: continue;
859: }
860:
861: /* Prefix key already pressed. Reset prefix and lookup key. */
862: c->flags &= ~CLIENT_PREFIX;
1.14 nicm 863: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
1.1 nicm 864: /* If repeating, treat this as a key, else ignore. */
865: if (c->flags & CLIENT_REPEAT) {
866: c->flags &= ~CLIENT_REPEAT;
867: if (key == prefix)
868: c->flags |= CLIENT_PREFIX;
869: else
870: window_pane_key(wp, c, key);
871: }
872: continue;
873: }
874:
875: /* If already repeating, but this key can't repeat, skip it. */
876: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
877: c->flags &= ~CLIENT_REPEAT;
878: if (key == prefix)
879: c->flags |= CLIENT_PREFIX;
880: else
881: window_pane_key(wp, c, key);
882: continue;
883: }
884:
885: /* If this key can repeat, reset the repeat flags and timer. */
886: if (xtimeout != 0 && bd->can_repeat) {
887: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
888:
889: tv.tv_sec = xtimeout / 1000;
890: tv.tv_usec = (xtimeout % 1000) * 1000L;
891: if (gettimeofday(&c->repeat_timer, NULL) != 0)
1.39 ! nicm 892: fatal("gettimeofday failed");
1.1 nicm 893: timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
894: }
895:
896: /* Dispatch the command. */
897: key_bindings_dispatch(bd, c);
898: }
899: if (c->session == NULL)
900: return;
901: wp = c->session->curw->window->active; /* could die - do each loop */
902: s = wp->screen;
903:
1.21 nicm 904: /*
905: * Update cursor position and mode settings. The scroll region and
906: * attributes are cleared across poll(2) as this is the most likely
907: * time a user may interrupt tmux, for example with ~^Z in ssh(1). This
908: * is a compromise between excessive resets and likelihood of an
909: * interrupt.
910: *
911: * tty_region/tty_reset/tty_update_mode already take care of not
912: * resetting things that are already in their default state.
913: */
1.1 nicm 914: status = options_get_number(&c->session->options, "status");
1.17 nicm 915: tty_region(&c->tty, 0, c->tty.sy - 1, 0);
1.11 nicm 916: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
917: tty_cursor(&c->tty, 0, 0, 0, 0);
918: else
1.1 nicm 919: tty_cursor(&c->tty, s->cx, s->cy, wp->xoff, wp->yoff);
920:
921: mode = s->mode;
922: if (server_locked)
923: mode &= ~TTY_NOCURSOR;
924: tty_update_mode(&c->tty, mode);
1.21 nicm 925: tty_reset(&c->tty);
1.1 nicm 926: }
927:
928: /* Lost a client. */
929: void
930: server_lost_client(struct client *c)
931: {
932: u_int i;
933:
934: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
935: if (ARRAY_ITEM(&clients, i) == c)
936: ARRAY_SET(&clients, i, NULL);
937: }
1.20 nicm 938: log_debug("lost client %d", c->ibuf.fd);
1.1 nicm 939:
1.25 nicm 940: /*
941: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
942: * and tty_free might close an unrelated fd.
943: */
944: if (c->flags & CLIENT_TERMINAL)
945: tty_free(&c->tty);
1.1 nicm 946:
947: screen_free(&c->status);
948:
949: if (c->title != NULL)
950: xfree(c->title);
951:
952: if (c->message_string != NULL)
953: xfree(c->message_string);
954:
955: if (c->prompt_string != NULL)
956: xfree(c->prompt_string);
957: if (c->prompt_buffer != NULL)
958: xfree(c->prompt_buffer);
959: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
960: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
961: ARRAY_FREE(&c->prompt_hdata);
962:
963: if (c->cwd != NULL)
964: xfree(c->cwd);
965:
1.18 nicm 966: close(c->ibuf.fd);
967: imsg_clear(&c->ibuf);
1.31 nicm 968:
969: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
970: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
971: ARRAY_SET(&dead_clients, i, c);
972: break;
973: }
974: }
975: if (i == ARRAY_LENGTH(&dead_clients))
976: ARRAY_ADD(&dead_clients, c);
977: c->flags |= CLIENT_DEAD;
1.1 nicm 978:
979: recalculate_sizes();
1.31 nicm 980: }
981:
982: /* Free dead, unreferenced clients and sessions. */
983: void
984: server_clean_dead(void)
985: {
986: struct session *s;
987: struct client *c;
988: u_int i;
989:
990: for (i = 0; i < ARRAY_LENGTH(&dead_sessions); i++) {
991: s = ARRAY_ITEM(&dead_sessions, i);
992: if (s == NULL || s->references != 0)
993: continue;
994: ARRAY_SET(&dead_sessions, i, NULL);
995: xfree(s);
996: }
997:
998: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
999: c = ARRAY_ITEM(&dead_clients, i);
1000: if (c == NULL || c->references != 0)
1001: continue;
1002: ARRAY_SET(&dead_clients, i, NULL);
1003: xfree(c);
1004: }
1.1 nicm 1005: }
1006:
1007: /* Handle window data. */
1008: void
1009: server_handle_window(struct window *w, struct window_pane *wp)
1010: {
1011: struct session *s;
1012: u_int i;
1013: int update;
1014:
1015: window_pane_parse(wp);
1016:
1017: if ((w->flags & (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT)) == 0)
1018: return;
1019:
1020: update = 0;
1021: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1022: s = ARRAY_ITEM(&sessions, i);
1023: if (s == NULL || !session_has(s, w))
1024: continue;
1025:
1.10 nicm 1026: update += server_check_window_bell(s, w);
1.1 nicm 1027: update += server_check_window_activity(s, w);
1028: update += server_check_window_content(s, w, wp);
1029: }
1030: if (update)
1031: server_status_window(w);
1032:
1033: w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
1034: }
1035:
1036: int
1.10 nicm 1037: server_check_window_bell(struct session *s, struct window *w)
1.1 nicm 1038: {
1039: struct client *c;
1040: u_int i;
1.10 nicm 1041: int action, visual;
1.1 nicm 1042:
1043: if (!(w->flags & WINDOW_BELL))
1044: return (0);
1045: if (session_alert_has_window(s, w, WINDOW_BELL))
1046: return (0);
1047: session_alert_add(s, w, WINDOW_BELL);
1048:
1049: action = options_get_number(&s->options, "bell-action");
1050: switch (action) {
1051: case BELL_ANY:
1052: if (s->flags & SESSION_UNATTACHED)
1053: break;
1.10 nicm 1054: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1055: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1056: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1057: if (c == NULL || c->session != s)
1058: continue;
1059: if (!visual) {
1.1 nicm 1060: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1061: continue;
1062: }
1063: if (c->session->curw->window == w) {
1064: status_message_set(c, "Bell in current window");
1065: continue;
1066: }
1067: status_message_set(c, "Bell in window %u",
1068: winlink_find_by_window(&s->windows, w)->idx);
1.1 nicm 1069: }
1070: break;
1071: case BELL_CURRENT:
1.10 nicm 1072: if (s->flags & SESSION_UNATTACHED)
1.1 nicm 1073: break;
1.10 nicm 1074: visual = options_get_number(&s->options, "visual-bell");
1.1 nicm 1075: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1076: c = ARRAY_ITEM(&clients, i);
1.10 nicm 1077: if (c == NULL || c->session != s)
1078: continue;
1079: if (c->session->curw->window != w)
1080: continue;
1081: if (!visual) {
1.1 nicm 1082: tty_putcode(&c->tty, TTYC_BEL);
1.10 nicm 1083: continue;
1084: }
1085: status_message_set(c, "Bell in current window");
1.1 nicm 1086: }
1087: break;
1088: }
1089: return (1);
1090: }
1091:
1092: int
1093: server_check_window_activity(struct session *s, struct window *w)
1094: {
1.10 nicm 1095: struct client *c;
1096: u_int i;
1097:
1.1 nicm 1098: if (!(w->flags & WINDOW_ACTIVITY))
1099: return (0);
1.10 nicm 1100:
1.1 nicm 1101: if (!options_get_number(&w->options, "monitor-activity"))
1102: return (0);
1.10 nicm 1103:
1.1 nicm 1104: if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
1105: return (0);
1.10 nicm 1106: if (s->curw->window == w)
1107: return (0);
1108:
1.1 nicm 1109: session_alert_add(s, w, WINDOW_ACTIVITY);
1.10 nicm 1110: if (s->flags & SESSION_UNATTACHED)
1111: return (0);
1112: if (options_get_number(&s->options, "visual-activity")) {
1113: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1114: c = ARRAY_ITEM(&clients, i);
1115: if (c == NULL || c->session != s)
1116: continue;
1117: status_message_set(c, "Activity in window %u",
1118: winlink_find_by_window(&s->windows, w)->idx);
1119: }
1120: }
1121:
1.1 nicm 1122: return (1);
1123: }
1124:
1125: int
1126: server_check_window_content(
1127: struct session *s, struct window *w, struct window_pane *wp)
1128: {
1.10 nicm 1129: struct client *c;
1130: u_int i;
1131: char *found, *ptr;
1132:
1133: if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
1134: return (0);
1.1 nicm 1135:
1.10 nicm 1136: ptr = options_get_string(&w->options, "monitor-content");
1137: if (ptr == NULL || *ptr == '\0')
1.1 nicm 1138: return (0);
1.10 nicm 1139:
1140: if (session_alert_has_window(s, w, WINDOW_CONTENT))
1.1 nicm 1141: return (0);
1.10 nicm 1142: if (s->curw->window == w)
1.1 nicm 1143: return (0);
1.10 nicm 1144:
1.3 nicm 1145: if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
1.1 nicm 1146: return (0);
1.10 nicm 1147: xfree(found);
1148:
1.1 nicm 1149: session_alert_add(s, w, WINDOW_CONTENT);
1.10 nicm 1150: if (s->flags & SESSION_UNATTACHED)
1151: return (0);
1152: if (options_get_number(&s->options, "visual-content")) {
1153: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1154: c = ARRAY_ITEM(&clients, i);
1155: if (c == NULL || c->session != s)
1156: continue;
1157: status_message_set(c, "Content in window %u",
1158: winlink_find_by_window(&s->windows, w)->idx);
1159: }
1160: }
1161:
1.1 nicm 1162: return (1);
1163: }
1164:
1.2 nicm 1165: /* Check if window still exists. */
1.1 nicm 1166: void
1167: server_check_window(struct window *w)
1168: {
1169: struct window_pane *wp, *wq;
1.22 nicm 1170: struct options *oo = &w->options;
1.1 nicm 1171: struct session *s;
1172: struct winlink *wl;
1.35 nicm 1173: u_int i;
1.22 nicm 1174: int destroyed;
1.1 nicm 1175:
1176: destroyed = 1;
1177:
1178: wp = TAILQ_FIRST(&w->panes);
1179: while (wp != NULL) {
1180: wq = TAILQ_NEXT(wp, entry);
1.2 nicm 1181: /*
1182: * If the pane has died and the remain-on-exit flag is not set,
1183: * remove the pane; otherwise, if the flag is set, don't allow
1184: * the window to be destroyed (or it'll close when the last
1185: * pane dies).
1186: */
1.23 nicm 1187: if (wp->fd == -1 && !options_get_number(oo, "remain-on-exit")) {
1.11 nicm 1188: layout_close_pane(wp);
1.1 nicm 1189: window_remove_pane(w, wp);
1190: server_redraw_window(w);
1.2 nicm 1191: } else
1192: destroyed = 0;
1.1 nicm 1193: wp = wq;
1194: }
1195:
1196: if (!destroyed)
1197: return;
1198:
1199: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1200: s = ARRAY_ITEM(&sessions, i);
1201: if (s == NULL)
1202: continue;
1203: if (!session_has(s, w))
1204: continue;
1205:
1206: restart:
1207: /* Detach window and either redraw or kill clients. */
1208: RB_FOREACH(wl, winlinks, &s->windows) {
1209: if (wl->window != w)
1210: continue;
1.34 nicm 1211: if (session_detach(s, wl)) {
1212: server_destroy_session(s);
1213: break;
1.1 nicm 1214: }
1.34 nicm 1215: server_redraw_session(s);
1.1 nicm 1216: goto restart;
1217: }
1218: }
1219:
1220: recalculate_sizes();
1221: }
1222:
1223: /* Call any once-per-second timers. */
1224: void
1225: server_second_timers(void)
1226: {
1227: struct window *w;
1.28 nicm 1228: struct client *c;
1.1 nicm 1229: struct window_pane *wp;
1230: u_int i;
1231: int xtimeout;
1232: struct tm now, then;
1233: static time_t last_t = 0;
1234: time_t t;
1235:
1236: t = time(NULL);
1.28 nicm 1237:
1.6 nicm 1238: xtimeout = options_get_number(&global_s_options, "lock-after-time");
1.1 nicm 1239: if (xtimeout > 0 && t > server_activity + xtimeout)
1240: server_lock();
1241:
1242: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
1243: w = ARRAY_ITEM(&windows, i);
1244: if (w == NULL)
1245: continue;
1246:
1247: TAILQ_FOREACH(wp, &w->panes, entry) {
1248: if (wp->mode != NULL && wp->mode->timer != NULL)
1249: wp->mode->timer(wp);
1.28 nicm 1250: }
1251: }
1252:
1.29 nicm 1253: if (password_backoff != 0 && t >= password_backoff) {
1.28 nicm 1254: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1255: if ((c = ARRAY_ITEM(&clients, i)) != NULL)
1256: server_redraw_client(c);
1.1 nicm 1257: }
1.29 nicm 1258: password_backoff = 0;
1.1 nicm 1259: }
1260:
1261: /* Check for a minute having passed. */
1262: gmtime_r(&t, &now);
1263: gmtime_r(&last_t, &then);
1264: if (now.tm_min == then.tm_min)
1265: return;
1266: last_t = t;
1267:
1268: /* If locked, redraw all clients. */
1269: if (server_locked) {
1270: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
1.30 kili 1271: if ((c = ARRAY_ITEM(&clients, i)) != NULL)
1272: server_redraw_client(c);
1.1 nicm 1273: }
1274: }
1275: }
1276:
1277: /* Update socket execute permissions based on whether sessions are attached. */
1278: int
1279: server_update_socket(void)
1280: {
1281: struct session *s;
1282: u_int i;
1283: static int last = -1;
1284: int n;
1285:
1286: n = 0;
1287: for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
1288: s = ARRAY_ITEM(&sessions, i);
1289: if (s != NULL && !(s->flags & SESSION_UNATTACHED)) {
1290: n++;
1291: break;
1292: }
1293: }
1294:
1295: if (n != last) {
1296: last = n;
1297: if (n != 0)
1298: chmod(socket_path, S_IRWXU);
1299: else
1300: chmod(socket_path, S_IRUSR|S_IWUSR);
1301: }
1302:
1303: return (n);
1304: }