Annotation of src/usr.bin/tmux/server-client.c, Revision 1.53
1.53 ! nicm 1: /* $OpenBSD: server-client.c,v 1.52 2011/03/29 19:30:16 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2009 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:
1.12 nicm 21: #include <event.h>
1.1 nicm 22: #include <fcntl.h>
23: #include <string.h>
1.4 nicm 24: #include <time.h>
1.1 nicm 25: #include <paths.h>
26: #include <unistd.h>
27:
28: #include "tmux.h"
29:
1.18 nicm 30: void server_client_handle_key(int, struct mouse_event *, void *);
1.17 nicm 31: void server_client_repeat_timer(int, short, void *);
1.36 nicm 32: void server_client_check_exit(struct client *);
1.40 nicm 33: void server_client_check_backoff(struct client *);
1.1 nicm 34: void server_client_check_redraw(struct client *);
35: void server_client_set_title(struct client *);
1.18 nicm 36: void server_client_reset_state(struct client *);
1.36 nicm 37: void server_client_in_callback(struct bufferevent *, short, void *);
38: void server_client_out_callback(struct bufferevent *, short, void *);
39: void server_client_err_callback(struct bufferevent *, short, void *);
1.1 nicm 40:
41: int server_client_msg_dispatch(struct client *);
42: void server_client_msg_command(struct client *, struct msg_command_data *);
43: void server_client_msg_identify(
1.25 nicm 44: struct client *, struct msg_identify_data *, int);
1.1 nicm 45: void server_client_msg_shell(struct client *);
46:
47: void printflike2 server_client_msg_error(struct cmd_ctx *, const char *, ...);
48: void printflike2 server_client_msg_print(struct cmd_ctx *, const char *, ...);
49: void printflike2 server_client_msg_info(struct cmd_ctx *, const char *, ...);
50:
51: /* Create a new client. */
52: void
53: server_client_create(int fd)
54: {
55: struct client *c;
56: u_int i;
57:
1.49 nicm 58: setblocking(fd, 0);
1.1 nicm 59:
60: c = xcalloc(1, sizeof *c);
61: c->references = 0;
62: imsg_init(&c->ibuf, fd);
1.14 nicm 63: server_update_event(c);
1.25 nicm 64:
1.10 nicm 65: if (gettimeofday(&c->creation_time, NULL) != 0)
1.1 nicm 66: fatal("gettimeofday failed");
1.11 nicm 67: memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
1.1 nicm 68:
1.36 nicm 69: c->stdin_event = NULL;
70: c->stdout_event = NULL;
71: c->stderr_event = NULL;
1.33 nicm 72:
1.1 nicm 73: c->tty.fd = -1;
74: c->title = NULL;
75:
76: c->session = NULL;
1.45 nicm 77: c->last_session = NULL;
1.1 nicm 78: c->tty.sx = 80;
79: c->tty.sy = 24;
80:
81: screen_init(&c->status, c->tty.sx, 1, 0);
1.51 nicm 82: RB_INIT(&c->status_new);
83: RB_INIT(&c->status_old);
1.1 nicm 84:
85: c->message_string = NULL;
1.21 nicm 86: ARRAY_INIT(&c->message_log);
1.1 nicm 87:
88: c->prompt_string = NULL;
89: c->prompt_buffer = NULL;
90: c->prompt_index = 0;
91:
1.17 nicm 92: evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
93:
1.1 nicm 94: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
95: if (ARRAY_ITEM(&clients, i) == NULL) {
96: ARRAY_SET(&clients, i, c);
97: return;
98: }
99: }
100: ARRAY_ADD(&clients, c);
101: log_debug("new client %d", fd);
102: }
103:
104: /* Lost a client. */
105: void
106: server_client_lost(struct client *c)
107: {
1.21 nicm 108: struct message_entry *msg;
109: u_int i;
1.1 nicm 110:
111: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
112: if (ARRAY_ITEM(&clients, i) == c)
113: ARRAY_SET(&clients, i, NULL);
114: }
115: log_debug("lost client %d", c->ibuf.fd);
116:
117: /*
118: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
119: * and tty_free might close an unrelated fd.
120: */
121: if (c->flags & CLIENT_TERMINAL)
122: tty_free(&c->tty);
123:
1.49 nicm 124: if (c->stdin_fd != -1) {
125: setblocking(c->stdin_fd, 1);
1.36 nicm 126: close(c->stdin_fd);
1.49 nicm 127: }
1.36 nicm 128: if (c->stdin_event != NULL)
129: bufferevent_free(c->stdin_event);
1.49 nicm 130: if (c->stdout_fd != -1) {
131: setblocking(c->stdout_fd, 1);
1.36 nicm 132: close(c->stdout_fd);
1.49 nicm 133: }
1.36 nicm 134: if (c->stdout_event != NULL)
135: bufferevent_free(c->stdout_event);
1.49 nicm 136: if (c->stderr_fd != -1) {
137: setblocking(c->stderr_fd, 1);
1.36 nicm 138: close(c->stderr_fd);
1.49 nicm 139: }
1.36 nicm 140: if (c->stderr_event != NULL)
141: bufferevent_free(c->stderr_event);
1.33 nicm 142:
1.51 nicm 143: status_free_jobs(&c->status_new);
144: status_free_jobs(&c->status_old);
1.1 nicm 145: screen_free(&c->status);
146:
147: if (c->title != NULL)
148: xfree(c->title);
149:
1.17 nicm 150: evtimer_del(&c->repeat_timer);
151:
1.15 nicm 152: evtimer_del(&c->identify_timer);
153:
1.1 nicm 154: if (c->message_string != NULL)
155: xfree(c->message_string);
1.15 nicm 156: evtimer_del(&c->message_timer);
1.21 nicm 157: for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
158: msg = &ARRAY_ITEM(&c->message_log, i);
159: xfree(msg->msg);
160: }
161: ARRAY_FREE(&c->message_log);
1.1 nicm 162:
163: if (c->prompt_string != NULL)
164: xfree(c->prompt_string);
165: if (c->prompt_buffer != NULL)
166: xfree(c->prompt_buffer);
167:
168: if (c->cwd != NULL)
169: xfree(c->cwd);
170:
171: close(c->ibuf.fd);
172: imsg_clear(&c->ibuf);
1.12 nicm 173: event_del(&c->event);
1.13 nicm 174:
1.1 nicm 175: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
176: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
177: ARRAY_SET(&dead_clients, i, c);
178: break;
179: }
180: }
181: if (i == ARRAY_LENGTH(&dead_clients))
182: ARRAY_ADD(&dead_clients, c);
183: c->flags |= CLIENT_DEAD;
184:
185: recalculate_sizes();
1.41 nicm 186: server_check_unattached();
1.19 nicm 187: server_update_socket();
1.9 nicm 188: }
189:
1.1 nicm 190: /* Process a single client event. */
191: void
1.12 nicm 192: server_client_callback(int fd, short events, void *data)
1.1 nicm 193: {
194: struct client *c = data;
1.7 nicm 195:
196: if (c->flags & CLIENT_DEAD)
197: return;
1.1 nicm 198:
199: if (fd == c->ibuf.fd) {
1.12 nicm 200: if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
1.1 nicm 201: goto client_lost;
202:
203: if (c->flags & CLIENT_BAD) {
204: if (c->ibuf.w.queued == 0)
205: goto client_lost;
206: return;
207: }
208:
1.12 nicm 209: if (events & EV_READ && server_client_msg_dispatch(c) != 0)
1.1 nicm 210: goto client_lost;
211: }
1.14 nicm 212:
1.25 nicm 213: server_update_event(c);
1.1 nicm 214: return;
215:
216: client_lost:
217: server_client_lost(c);
218: }
219:
1.16 nicm 220: /* Handle client status timer. */
221: void
222: server_client_status_timer(void)
223: {
224: struct client *c;
225: struct session *s;
226: struct timeval tv;
1.20 nicm 227: u_int i;
228: int interval;
229: time_t difference;
1.16 nicm 230:
231: if (gettimeofday(&tv, NULL) != 0)
232: fatal("gettimeofday failed");
233:
234: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
235: c = ARRAY_ITEM(&clients, i);
236: if (c == NULL || c->session == NULL)
237: continue;
238: if (c->message_string != NULL || c->prompt_string != NULL) {
239: /*
240: * Don't need timed redraw for messages/prompts so bail
241: * now. The status timer isn't reset when they are
242: * redrawn anyway.
243: */
244: continue;
245: }
246: s = c->session;
247:
248: if (!options_get_number(&s->options, "status"))
249: continue;
250: interval = options_get_number(&s->options, "status-interval");
251:
1.20 nicm 252: difference = tv.tv_sec - c->status_timer.tv_sec;
253: if (difference >= interval) {
1.51 nicm 254: status_update_jobs(c);
1.16 nicm 255: c->flags |= CLIENT_STATUS;
256: }
257: }
258: }
259:
1.18 nicm 260: /* Handle data key input from client. */
261: void
262: server_client_handle_key(int key, struct mouse_event *mouse, void *data)
263: {
264: struct client *c = data;
265: struct session *s;
266: struct window *w;
267: struct window_pane *wp;
268: struct options *oo;
269: struct timeval tv;
270: struct key_binding *bd;
271: struct keylist *keylist;
272: int xtimeout, isprefix;
273: u_int i;
274:
275: /* Check the client is good to accept input. */
276: if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
277: return;
278: if (c->session == NULL)
279: return;
280: s = c->session;
281:
282: /* Update the activity timer. */
283: if (gettimeofday(&c->activity_time, NULL) != 0)
284: fatal("gettimeofday failed");
285: memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
286:
287: w = c->session->curw->window;
288: wp = w->active;
289: oo = &c->session->options;
290:
291: /* Special case: number keys jump to pane in identify mode. */
1.25 nicm 292: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
1.30 nicm 293: if (c->flags & CLIENT_READONLY)
294: return;
1.18 nicm 295: wp = window_pane_at_index(w, key - '0');
296: if (wp != NULL && window_pane_visible(wp))
297: window_set_active_pane(w, wp);
298: server_clear_identify(c);
299: return;
300: }
301:
302: /* Handle status line. */
1.30 nicm 303: if (!(c->flags & CLIENT_READONLY)) {
304: status_message_clear(c);
305: server_clear_identify(c);
306: }
1.18 nicm 307: if (c->prompt_string != NULL) {
1.30 nicm 308: if (!(c->flags & CLIENT_READONLY))
309: status_prompt_key(c, key);
1.18 nicm 310: return;
311: }
312:
313: /* Check for mouse keys. */
314: if (key == KEYC_MOUSE) {
1.30 nicm 315: if (c->flags & CLIENT_READONLY)
316: return;
1.18 nicm 317: if (options_get_number(oo, "mouse-select-pane")) {
318: window_set_active_at(w, mouse->x, mouse->y);
1.28 nicm 319: server_redraw_window_borders(w);
1.18 nicm 320: wp = w->active;
321: }
1.53 ! nicm 322: if (mouse->y + 1 == c->tty.sy && mouse->b == MOUSE_UP &&
! 323: options_get_number(oo, "mouse-select-window") &&
! 324: options_get_number(oo, "status")) {
! 325: status_set_window_at(c, mouse->x);
! 326: return;
! 327: }
1.31 nicm 328: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 329: return;
330: }
331:
332: /* Is this a prefix key? */
333: keylist = options_get_data(&c->session->options, "prefix");
334: isprefix = 0;
335: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
336: if (key == ARRAY_ITEM(keylist, i)) {
337: isprefix = 1;
338: break;
339: }
340: }
341:
342: /* No previous prefix key. */
343: if (!(c->flags & CLIENT_PREFIX)) {
344: if (isprefix)
345: c->flags |= CLIENT_PREFIX;
346: else {
347: /* Try as a non-prefix key binding. */
1.30 nicm 348: if ((bd = key_bindings_lookup(key)) == NULL) {
349: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 350: window_pane_key(wp, c->session, key);
1.30 nicm 351: } else
1.18 nicm 352: key_bindings_dispatch(bd, c);
353: }
354: return;
355: }
356:
357: /* Prefix key already pressed. Reset prefix and lookup key. */
358: c->flags &= ~CLIENT_PREFIX;
359: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
360: /* If repeating, treat this as a key, else ignore. */
361: if (c->flags & CLIENT_REPEAT) {
362: c->flags &= ~CLIENT_REPEAT;
363: if (isprefix)
364: c->flags |= CLIENT_PREFIX;
1.30 nicm 365: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 366: window_pane_key(wp, c->session, key);
1.18 nicm 367: }
368: return;
369: }
370:
371: /* If already repeating, but this key can't repeat, skip it. */
372: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
373: c->flags &= ~CLIENT_REPEAT;
374: if (isprefix)
375: c->flags |= CLIENT_PREFIX;
1.30 nicm 376: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 377: window_pane_key(wp, c->session, key);
1.18 nicm 378: return;
379: }
380:
381: /* If this key can repeat, reset the repeat flags and timer. */
382: xtimeout = options_get_number(&c->session->options, "repeat-time");
383: if (xtimeout != 0 && bd->can_repeat) {
384: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 385:
1.18 nicm 386: tv.tv_sec = xtimeout / 1000;
387: tv.tv_usec = (xtimeout % 1000) * 1000L;
388: evtimer_del(&c->repeat_timer);
389: evtimer_add(&c->repeat_timer, &tv);
390: }
391:
392: /* Dispatch the command. */
393: key_bindings_dispatch(bd, c);
394: }
395:
1.2 nicm 396: /* Client functions that need to happen every loop. */
397: void
398: server_client_loop(void)
399: {
400: struct client *c;
401: struct window *w;
402: struct window_pane *wp;
403: u_int i;
404:
405: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
406: c = ARRAY_ITEM(&clients, i);
1.36 nicm 407: if (c == NULL)
1.2 nicm 408: continue;
409:
1.36 nicm 410: server_client_check_exit(c);
411: if (c->session != NULL) {
412: server_client_check_redraw(c);
413: server_client_reset_state(c);
414: }
1.2 nicm 415: }
416:
417: /*
418: * Any windows will have been redrawn as part of clients, so clear
419: * their flags now.
420: */
421: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
422: w = ARRAY_ITEM(&windows, i);
423: if (w == NULL)
424: continue;
425:
426: w->flags &= ~WINDOW_REDRAW;
427: TAILQ_FOREACH(wp, &w->panes, entry)
428: wp->flags &= ~PANE_REDRAW;
429: }
430: }
431:
1.18 nicm 432: /*
433: * Update cursor position and mode settings. The scroll region and attributes
434: * are cleared when idle (waiting for an event) as this is the most likely time
435: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
436: * compromise between excessive resets and likelihood of an interrupt.
437: *
438: * tty_region/tty_reset/tty_update_mode already take care of not resetting
439: * things that are already in their default state.
440: */
1.1 nicm 441: void
1.18 nicm 442: server_client_reset_state(struct client *c)
1.1 nicm 443: {
1.18 nicm 444: struct window *w = c->session->curw->window;
445: struct window_pane *wp = w->active;
446: struct screen *s = wp->screen;
447: struct options *oo = &c->session->options;
448: int status, mode;
1.1 nicm 449:
450: tty_region(&c->tty, 0, c->tty.sy - 1);
451:
452: status = options_get_number(oo, "status");
453: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
454: tty_cursor(&c->tty, 0, 0);
455: else
456: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
457:
1.50 nicm 458: /*
459: * Any mode will do for mouse-select-pane, but set standard mode if
460: * none.
461: */
1.1 nicm 462: mode = s->mode;
463: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
1.50 nicm 464: options_get_number(oo, "mouse-select-pane") &&
1.53 ! nicm 465: (mode & ALL_MOUSE_MODES) == 0)
! 466: mode |= MODE_MOUSE_STANDARD;
! 467:
! 468: if (options_get_number(oo, "mouse-select-window") &&
1.50 nicm 469: (mode & ALL_MOUSE_MODES) == 0)
1.46 nicm 470: mode |= MODE_MOUSE_STANDARD;
1.48 nicm 471:
472: /*
473: * Set UTF-8 mouse input if required. If the terminal is UTF-8, the
474: * user has set mouse-utf8 and any mouse mode is in effect, turn on
475: * UTF-8 mouse input. If the receiving terminal hasn't requested it
476: * (that is, it isn't in s->mode), then it'll be converted in
477: * input_mouse.
478: */
479: if ((c->tty.flags & TTY_UTF8) &&
480: (mode & ALL_MOUSE_MODES) && options_get_number(oo, "mouse-utf8"))
481: mode |= MODE_MOUSE_UTF8;
482: else
483: mode &= ~MODE_MOUSE_UTF8;
484:
485: /* Set the terminal mode and reset attributes. */
1.1 nicm 486: tty_update_mode(&c->tty, mode);
487: tty_reset(&c->tty);
1.17 nicm 488: }
489:
490: /* Repeat time callback. */
1.24 nicm 491: /* ARGSUSED */
1.17 nicm 492: void
493: server_client_repeat_timer(unused int fd, unused short events, void *data)
494: {
495: struct client *c = data;
496:
497: if (c->flags & CLIENT_REPEAT)
498: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 499: }
500:
1.36 nicm 501: /* Check if client should be exited. */
502: void
503: server_client_check_exit(struct client *c)
504: {
505: struct msg_exit_data exitdata;
506:
507: if (!(c->flags & CLIENT_EXIT))
508: return;
509:
510: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
511: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
512: return;
513: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
514: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
515: return;
516:
517: exitdata.retcode = c->retcode;
518: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
519:
520: c->flags &= ~CLIENT_EXIT;
521: }
522:
1.38 nicm 523: /*
524: * Check if the client should backoff. During backoff, data from external
525: * programs is not written to the terminal. When the existing data drains, the
526: * client is redrawn.
527: *
528: * There are two backoff phases - both the tty and client have backoff flags -
529: * the first to allow existing data to drain and the latter to ensure backoff
530: * is disabled until the redraw has finished and prevent the redraw triggering
531: * another backoff.
532: */
533: void
534: server_client_check_backoff(struct client *c)
535: {
536: struct tty *tty = &c->tty;
537: size_t used;
538:
539: used = EVBUFFER_LENGTH(tty->event->output);
540:
541: /*
542: * If in the second backoff phase (redrawing), don't check backoff
543: * until the redraw has completed (or enough of it to drop below the
544: * backoff threshold).
545: */
546: if (c->flags & CLIENT_BACKOFF) {
547: if (used > BACKOFF_THRESHOLD)
548: return;
549: c->flags &= ~CLIENT_BACKOFF;
550: return;
551: }
552:
553: /* Once drained, allow data through again and schedule redraw. */
554: if (tty->flags & TTY_BACKOFF) {
555: if (used != 0)
556: return;
557: tty->flags &= ~TTY_BACKOFF;
558: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
559: return;
560: }
561:
562: /* If too much data, start backoff. */
563: if (used > BACKOFF_THRESHOLD)
564: tty->flags |= TTY_BACKOFF;
565: }
566:
1.1 nicm 567: /* Check for client redraws. */
568: void
569: server_client_check_redraw(struct client *c)
570: {
571: struct session *s = c->session;
572: struct window_pane *wp;
573: int flags, redraw;
574:
575: flags = c->tty.flags & TTY_FREEZE;
576: c->tty.flags &= ~TTY_FREEZE;
577:
578: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
579: if (options_get_number(&s->options, "set-titles"))
580: server_client_set_title(c);
1.12 nicm 581:
1.1 nicm 582: if (c->message_string != NULL)
583: redraw = status_message_redraw(c);
584: else if (c->prompt_string != NULL)
585: redraw = status_prompt_redraw(c);
586: else
587: redraw = status_redraw(c);
588: if (!redraw)
589: c->flags &= ~CLIENT_STATUS;
590: }
591:
592: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 593: screen_redraw_screen(c, 0, 0);
594: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 595: } else if (c->flags & CLIENT_REDRAWWINDOW) {
596: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
597: screen_redraw_pane(c, wp);
598: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 599: } else {
600: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
601: if (wp->flags & PANE_REDRAW)
602: screen_redraw_pane(c, wp);
603: }
604: }
605:
1.27 nicm 606: if (c->flags & CLIENT_BORDERS)
607: screen_redraw_screen(c, 0, 1);
608:
1.1 nicm 609: if (c->flags & CLIENT_STATUS)
1.27 nicm 610: screen_redraw_screen(c, 1, 0);
1.1 nicm 611:
612: c->tty.flags |= flags;
613:
1.27 nicm 614: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 615: }
616:
617: /* Set client title. */
618: void
619: server_client_set_title(struct client *c)
620: {
621: struct session *s = c->session;
622: const char *template;
623: char *title;
624:
625: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 626:
1.52 nicm 627: title = status_replace(c, NULL, NULL, NULL, template, time(NULL), 1);
1.1 nicm 628: if (c->title == NULL || strcmp(title, c->title) != 0) {
629: if (c->title != NULL)
630: xfree(c->title);
631: c->title = xstrdup(title);
632: tty_set_title(&c->tty, c->title);
633: }
634: xfree(title);
635: }
636:
1.36 nicm 637: /*
638: * Error callback for client stdin. Caller must increase reference count when
639: * enabling event!
640: */
641: void
642: server_client_in_callback(
643: unused struct bufferevent *bufev, unused short what, void *data)
644: {
645: struct client *c = data;
646:
647: c->references--;
648: if (c->flags & CLIENT_DEAD)
649: return;
650:
651: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
1.49 nicm 652: setblocking(c->stdin_fd, 1);
1.36 nicm 653: close(c->stdin_fd);
654: c->stdin_fd = -1;
655:
656: if (c->stdin_callback != NULL)
657: c->stdin_callback(c, c->stdin_data);
658: }
659:
660: /* Error callback for client stdout. */
661: void
662: server_client_out_callback(
663: unused struct bufferevent *bufev, unused short what, unused void *data)
664: {
665: struct client *c = data;
666:
667: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
1.49 nicm 668: setblocking(c->stdout_fd, 1);
1.36 nicm 669: close(c->stdout_fd);
670: c->stdout_fd = -1;
671: }
672:
673: /* Error callback for client stderr. */
674: void
675: server_client_err_callback(
676: unused struct bufferevent *bufev, unused short what, unused void *data)
677: {
678: struct client *c = data;
679:
680: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
1.49 nicm 681: setblocking(c->stderr_fd, 1);
1.36 nicm 682: close(c->stderr_fd);
683: c->stderr_fd = -1;
684: }
685:
1.1 nicm 686: /* Dispatch message from client. */
687: int
688: server_client_msg_dispatch(struct client *c)
689: {
690: struct imsg imsg;
691: struct msg_command_data commanddata;
692: struct msg_identify_data identifydata;
693: struct msg_environ_data environdata;
694: ssize_t n, datalen;
695:
1.8 deraadt 696: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
697: return (-1);
1.1 nicm 698:
699: for (;;) {
700: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
701: return (-1);
702: if (n == 0)
703: return (0);
704: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
705:
706: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
707: server_write_client(c, MSG_VERSION, NULL, 0);
708: c->flags |= CLIENT_BAD;
709: imsg_free(&imsg);
710: continue;
711: }
712:
713: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
714: switch (imsg.hdr.type) {
715: case MSG_COMMAND:
716: if (datalen != sizeof commanddata)
717: fatalx("bad MSG_COMMAND size");
718: memcpy(&commanddata, imsg.data, sizeof commanddata);
719:
720: server_client_msg_command(c, &commanddata);
721: break;
722: case MSG_IDENTIFY:
723: if (datalen != sizeof identifydata)
724: fatalx("bad MSG_IDENTIFY size");
725: if (imsg.fd == -1)
726: fatalx("MSG_IDENTIFY missing fd");
727: memcpy(&identifydata, imsg.data, sizeof identifydata);
728:
1.39 nicm 729: c->stdin_fd = imsg.fd;
1.37 nicm 730: c->stdin_event = bufferevent_new(c->stdin_fd,
731: NULL, NULL, server_client_in_callback, c);
1.36 nicm 732: if (c->stdin_event == NULL)
733: fatalx("failed to create stdin event");
1.49 nicm 734: setblocking(c->stdin_fd, 0);
1.36 nicm 735:
1.1 nicm 736: server_client_msg_identify(c, &identifydata, imsg.fd);
737: break;
1.33 nicm 738: case MSG_STDOUT:
739: if (datalen != 0)
740: fatalx("bad MSG_STDOUT size");
741: if (imsg.fd == -1)
742: fatalx("MSG_STDOUT missing fd");
743:
1.36 nicm 744: c->stdout_fd = imsg.fd;
1.37 nicm 745: c->stdout_event = bufferevent_new(c->stdout_fd,
746: NULL, NULL, server_client_out_callback, c);
1.36 nicm 747: if (c->stdout_event == NULL)
748: fatalx("failed to create stdout event");
1.49 nicm 749: setblocking(c->stdout_fd, 0);
1.36 nicm 750:
1.33 nicm 751: break;
752: case MSG_STDERR:
753: if (datalen != 0)
754: fatalx("bad MSG_STDERR size");
755: if (imsg.fd == -1)
756: fatalx("MSG_STDERR missing fd");
757:
1.36 nicm 758: c->stderr_fd = imsg.fd;
1.37 nicm 759: c->stderr_event = bufferevent_new(c->stderr_fd,
760: NULL, NULL, server_client_err_callback, c);
1.36 nicm 761: if (c->stderr_event == NULL)
762: fatalx("failed to create stderr event");
1.49 nicm 763: setblocking(c->stderr_fd, 0);
1.36 nicm 764:
1.33 nicm 765: break;
1.1 nicm 766: case MSG_RESIZE:
767: if (datalen != 0)
768: fatalx("bad MSG_RESIZE size");
769:
1.32 nicm 770: if (tty_resize(&c->tty)) {
771: recalculate_sizes();
772: server_redraw_client(c);
773: }
1.1 nicm 774: break;
775: case MSG_EXITING:
776: if (datalen != 0)
777: fatalx("bad MSG_EXITING size");
778:
779: c->session = NULL;
780: tty_close(&c->tty);
781: server_write_client(c, MSG_EXITED, NULL, 0);
782: break;
783: case MSG_WAKEUP:
784: case MSG_UNLOCK:
785: if (datalen != 0)
786: fatalx("bad MSG_WAKEUP size");
787:
788: if (!(c->flags & CLIENT_SUSPENDED))
789: break;
790: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 791:
1.11 nicm 792: if (gettimeofday(&c->activity_time, NULL) != 0)
793: fatal("gettimeofday");
1.47 nicm 794: if (c->session != NULL)
795: session_update_activity(c->session);
1.10 nicm 796:
1.1 nicm 797: tty_start_tty(&c->tty);
798: server_redraw_client(c);
799: recalculate_sizes();
800: break;
801: case MSG_ENVIRON:
802: if (datalen != sizeof environdata)
803: fatalx("bad MSG_ENVIRON size");
804: memcpy(&environdata, imsg.data, sizeof environdata);
805:
806: environdata.var[(sizeof environdata.var) - 1] = '\0';
807: if (strchr(environdata.var, '=') != NULL)
808: environ_put(&c->environ, environdata.var);
809: break;
810: case MSG_SHELL:
811: if (datalen != 0)
812: fatalx("bad MSG_SHELL size");
813:
814: server_client_msg_shell(c);
815: break;
816: default:
817: fatalx("unexpected message");
818: }
819:
820: imsg_free(&imsg);
821: }
822: }
823:
824: /* Callback to send error message to client. */
825: void printflike2
826: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
827: {
1.33 nicm 828: va_list ap;
1.1 nicm 829:
830: va_start(ap, fmt);
1.36 nicm 831: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 832: va_end(ap);
833:
1.36 nicm 834: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 835: ctx->cmdclient->retcode = 1;
1.1 nicm 836: }
837:
838: /* Callback to send print message to client. */
839: void printflike2
840: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
841: {
1.33 nicm 842: va_list ap;
1.1 nicm 843:
844: va_start(ap, fmt);
1.36 nicm 845: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 846: va_end(ap);
847:
1.36 nicm 848: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 849: }
850:
851: /* Callback to send print message to client, if not quiet. */
852: void printflike2
853: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
854: {
1.33 nicm 855: va_list ap;
1.1 nicm 856:
1.26 nicm 857: if (options_get_number(&global_options, "quiet"))
1.1 nicm 858: return;
859:
860: va_start(ap, fmt);
1.36 nicm 861: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 862: va_end(ap);
863:
1.36 nicm 864: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 865: }
866:
867: /* Handle command message. */
868: void
869: server_client_msg_command(struct client *c, struct msg_command_data *data)
870: {
1.36 nicm 871: struct cmd_ctx ctx;
872: struct cmd_list *cmdlist = NULL;
873: int argc;
874: char **argv, *cause;
1.1 nicm 875:
876: ctx.error = server_client_msg_error;
877: ctx.print = server_client_msg_print;
878: ctx.info = server_client_msg_info;
879:
880: ctx.msgdata = data;
881: ctx.curclient = NULL;
882:
883: ctx.cmdclient = c;
884:
885: argc = data->argc;
886: data->argv[(sizeof data->argv) - 1] = '\0';
887: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
888: server_client_msg_error(&ctx, "command too long");
889: goto error;
890: }
891:
892: if (argc == 0) {
893: argc = 1;
894: argv = xcalloc(1, sizeof *argv);
895: *argv = xstrdup("new-session");
896: }
897:
898: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
899: server_client_msg_error(&ctx, "%s", cause);
900: cmd_free_argv(argc, argv);
901: goto error;
902: }
903: cmd_free_argv(argc, argv);
904:
1.36 nicm 905: if (cmd_list_exec(cmdlist, &ctx) != 1)
906: c->flags |= CLIENT_EXIT;
1.1 nicm 907: cmd_list_free(cmdlist);
908: return;
909:
910: error:
911: if (cmdlist != NULL)
912: cmd_list_free(cmdlist);
1.36 nicm 913: c->flags |= CLIENT_EXIT;
1.1 nicm 914: }
915:
916: /* Handle identify message. */
917: void
918: server_client_msg_identify(
919: struct client *c, struct msg_identify_data *data, int fd)
920: {
1.33 nicm 921: int tty_fd;
922:
1.1 nicm 923: c->cwd = NULL;
924: data->cwd[(sizeof data->cwd) - 1] = '\0';
925: if (*data->cwd != '\0')
926: c->cwd = xstrdup(data->cwd);
927:
1.33 nicm 928: if (!isatty(fd))
929: return;
930: if ((tty_fd = dup(fd)) == -1)
931: fatal("dup failed");
1.1 nicm 932: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 933: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 934: if (data->flags & IDENTIFY_UTF8)
935: c->tty.flags |= TTY_UTF8;
936: if (data->flags & IDENTIFY_256COLOURS)
937: c->tty.term_flags |= TERM_256COLOURS;
938: else if (data->flags & IDENTIFY_88COLOURS)
939: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 940: c->tty.key_callback = server_client_handle_key;
941: c->tty.key_data = c;
1.1 nicm 942:
943: tty_resize(&c->tty);
944:
945: c->flags |= CLIENT_TERMINAL;
946: }
947:
948: /* Handle shell message. */
949: void
950: server_client_msg_shell(struct client *c)
951: {
952: struct msg_shell_data data;
953: const char *shell;
1.25 nicm 954:
1.1 nicm 955: shell = options_get_string(&global_s_options, "default-shell");
956:
957: if (*shell == '\0' || areshell(shell))
958: shell = _PATH_BSHELL;
959: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
960: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 961:
1.1 nicm 962: server_write_client(c, MSG_SHELL, &data, sizeof data);
963: c->flags |= CLIENT_BAD; /* it will die after exec */
964: }
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