Annotation of src/usr.bin/tmux/server-client.c, Revision 1.52
1.52 ! nicm 1: /* $OpenBSD: server-client.c,v 1.51 2011/01/26 01:54:56 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: }
1.31 nicm 322: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 323: return;
324: }
325:
326: /* Is this a prefix key? */
327: keylist = options_get_data(&c->session->options, "prefix");
328: isprefix = 0;
329: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
330: if (key == ARRAY_ITEM(keylist, i)) {
331: isprefix = 1;
332: break;
333: }
334: }
335:
336: /* No previous prefix key. */
337: if (!(c->flags & CLIENT_PREFIX)) {
338: if (isprefix)
339: c->flags |= CLIENT_PREFIX;
340: else {
341: /* Try as a non-prefix key binding. */
1.30 nicm 342: if ((bd = key_bindings_lookup(key)) == NULL) {
343: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 344: window_pane_key(wp, c->session, key);
1.30 nicm 345: } else
1.18 nicm 346: key_bindings_dispatch(bd, c);
347: }
348: return;
349: }
350:
351: /* Prefix key already pressed. Reset prefix and lookup key. */
352: c->flags &= ~CLIENT_PREFIX;
353: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
354: /* If repeating, treat this as a key, else ignore. */
355: if (c->flags & CLIENT_REPEAT) {
356: c->flags &= ~CLIENT_REPEAT;
357: if (isprefix)
358: c->flags |= CLIENT_PREFIX;
1.30 nicm 359: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 360: window_pane_key(wp, c->session, key);
1.18 nicm 361: }
362: return;
363: }
364:
365: /* If already repeating, but this key can't repeat, skip it. */
366: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
367: c->flags &= ~CLIENT_REPEAT;
368: if (isprefix)
369: c->flags |= CLIENT_PREFIX;
1.30 nicm 370: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 371: window_pane_key(wp, c->session, key);
1.18 nicm 372: return;
373: }
374:
375: /* If this key can repeat, reset the repeat flags and timer. */
376: xtimeout = options_get_number(&c->session->options, "repeat-time");
377: if (xtimeout != 0 && bd->can_repeat) {
378: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 379:
1.18 nicm 380: tv.tv_sec = xtimeout / 1000;
381: tv.tv_usec = (xtimeout % 1000) * 1000L;
382: evtimer_del(&c->repeat_timer);
383: evtimer_add(&c->repeat_timer, &tv);
384: }
385:
386: /* Dispatch the command. */
387: key_bindings_dispatch(bd, c);
388: }
389:
1.2 nicm 390: /* Client functions that need to happen every loop. */
391: void
392: server_client_loop(void)
393: {
394: struct client *c;
395: struct window *w;
396: struct window_pane *wp;
397: u_int i;
398:
399: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
400: c = ARRAY_ITEM(&clients, i);
1.36 nicm 401: if (c == NULL)
1.2 nicm 402: continue;
403:
1.36 nicm 404: server_client_check_exit(c);
405: if (c->session != NULL) {
406: server_client_check_redraw(c);
407: server_client_reset_state(c);
408: }
1.2 nicm 409: }
410:
411: /*
412: * Any windows will have been redrawn as part of clients, so clear
413: * their flags now.
414: */
415: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
416: w = ARRAY_ITEM(&windows, i);
417: if (w == NULL)
418: continue;
419:
420: w->flags &= ~WINDOW_REDRAW;
421: TAILQ_FOREACH(wp, &w->panes, entry)
422: wp->flags &= ~PANE_REDRAW;
423: }
424: }
425:
1.18 nicm 426: /*
427: * Update cursor position and mode settings. The scroll region and attributes
428: * are cleared when idle (waiting for an event) as this is the most likely time
429: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
430: * compromise between excessive resets and likelihood of an interrupt.
431: *
432: * tty_region/tty_reset/tty_update_mode already take care of not resetting
433: * things that are already in their default state.
434: */
1.1 nicm 435: void
1.18 nicm 436: server_client_reset_state(struct client *c)
1.1 nicm 437: {
1.18 nicm 438: struct window *w = c->session->curw->window;
439: struct window_pane *wp = w->active;
440: struct screen *s = wp->screen;
441: struct options *oo = &c->session->options;
442: int status, mode;
1.1 nicm 443:
444: tty_region(&c->tty, 0, c->tty.sy - 1);
445:
446: status = options_get_number(oo, "status");
447: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
448: tty_cursor(&c->tty, 0, 0);
449: else
450: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
451:
1.50 nicm 452: /*
453: * Any mode will do for mouse-select-pane, but set standard mode if
454: * none.
455: */
1.1 nicm 456: mode = s->mode;
457: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
1.50 nicm 458: options_get_number(oo, "mouse-select-pane") &&
459: (mode & ALL_MOUSE_MODES) == 0)
1.46 nicm 460: mode |= MODE_MOUSE_STANDARD;
1.48 nicm 461:
462: /*
463: * Set UTF-8 mouse input if required. If the terminal is UTF-8, the
464: * user has set mouse-utf8 and any mouse mode is in effect, turn on
465: * UTF-8 mouse input. If the receiving terminal hasn't requested it
466: * (that is, it isn't in s->mode), then it'll be converted in
467: * input_mouse.
468: */
469: if ((c->tty.flags & TTY_UTF8) &&
470: (mode & ALL_MOUSE_MODES) && options_get_number(oo, "mouse-utf8"))
471: mode |= MODE_MOUSE_UTF8;
472: else
473: mode &= ~MODE_MOUSE_UTF8;
474:
475: /* Set the terminal mode and reset attributes. */
1.1 nicm 476: tty_update_mode(&c->tty, mode);
477: tty_reset(&c->tty);
1.17 nicm 478: }
479:
480: /* Repeat time callback. */
1.24 nicm 481: /* ARGSUSED */
1.17 nicm 482: void
483: server_client_repeat_timer(unused int fd, unused short events, void *data)
484: {
485: struct client *c = data;
486:
487: if (c->flags & CLIENT_REPEAT)
488: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 489: }
490:
1.36 nicm 491: /* Check if client should be exited. */
492: void
493: server_client_check_exit(struct client *c)
494: {
495: struct msg_exit_data exitdata;
496:
497: if (!(c->flags & CLIENT_EXIT))
498: return;
499:
500: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
501: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
502: return;
503: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
504: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
505: return;
506:
507: exitdata.retcode = c->retcode;
508: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
509:
510: c->flags &= ~CLIENT_EXIT;
511: }
512:
1.38 nicm 513: /*
514: * Check if the client should backoff. During backoff, data from external
515: * programs is not written to the terminal. When the existing data drains, the
516: * client is redrawn.
517: *
518: * There are two backoff phases - both the tty and client have backoff flags -
519: * the first to allow existing data to drain and the latter to ensure backoff
520: * is disabled until the redraw has finished and prevent the redraw triggering
521: * another backoff.
522: */
523: void
524: server_client_check_backoff(struct client *c)
525: {
526: struct tty *tty = &c->tty;
527: size_t used;
528:
529: used = EVBUFFER_LENGTH(tty->event->output);
530:
531: /*
532: * If in the second backoff phase (redrawing), don't check backoff
533: * until the redraw has completed (or enough of it to drop below the
534: * backoff threshold).
535: */
536: if (c->flags & CLIENT_BACKOFF) {
537: if (used > BACKOFF_THRESHOLD)
538: return;
539: c->flags &= ~CLIENT_BACKOFF;
540: return;
541: }
542:
543: /* Once drained, allow data through again and schedule redraw. */
544: if (tty->flags & TTY_BACKOFF) {
545: if (used != 0)
546: return;
547: tty->flags &= ~TTY_BACKOFF;
548: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
549: return;
550: }
551:
552: /* If too much data, start backoff. */
553: if (used > BACKOFF_THRESHOLD)
554: tty->flags |= TTY_BACKOFF;
555: }
556:
1.1 nicm 557: /* Check for client redraws. */
558: void
559: server_client_check_redraw(struct client *c)
560: {
561: struct session *s = c->session;
562: struct window_pane *wp;
563: int flags, redraw;
564:
565: flags = c->tty.flags & TTY_FREEZE;
566: c->tty.flags &= ~TTY_FREEZE;
567:
568: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
569: if (options_get_number(&s->options, "set-titles"))
570: server_client_set_title(c);
1.12 nicm 571:
1.1 nicm 572: if (c->message_string != NULL)
573: redraw = status_message_redraw(c);
574: else if (c->prompt_string != NULL)
575: redraw = status_prompt_redraw(c);
576: else
577: redraw = status_redraw(c);
578: if (!redraw)
579: c->flags &= ~CLIENT_STATUS;
580: }
581:
582: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 583: screen_redraw_screen(c, 0, 0);
584: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 585: } else if (c->flags & CLIENT_REDRAWWINDOW) {
586: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
587: screen_redraw_pane(c, wp);
588: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 589: } else {
590: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
591: if (wp->flags & PANE_REDRAW)
592: screen_redraw_pane(c, wp);
593: }
594: }
595:
1.27 nicm 596: if (c->flags & CLIENT_BORDERS)
597: screen_redraw_screen(c, 0, 1);
598:
1.1 nicm 599: if (c->flags & CLIENT_STATUS)
1.27 nicm 600: screen_redraw_screen(c, 1, 0);
1.1 nicm 601:
602: c->tty.flags |= flags;
603:
1.27 nicm 604: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 605: }
606:
607: /* Set client title. */
608: void
609: server_client_set_title(struct client *c)
610: {
611: struct session *s = c->session;
612: const char *template;
613: char *title;
614:
615: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 616:
1.52 ! nicm 617: title = status_replace(c, NULL, NULL, NULL, template, time(NULL), 1);
1.1 nicm 618: if (c->title == NULL || strcmp(title, c->title) != 0) {
619: if (c->title != NULL)
620: xfree(c->title);
621: c->title = xstrdup(title);
622: tty_set_title(&c->tty, c->title);
623: }
624: xfree(title);
625: }
626:
1.36 nicm 627: /*
628: * Error callback for client stdin. Caller must increase reference count when
629: * enabling event!
630: */
631: void
632: server_client_in_callback(
633: unused struct bufferevent *bufev, unused short what, void *data)
634: {
635: struct client *c = data;
636:
637: c->references--;
638: if (c->flags & CLIENT_DEAD)
639: return;
640:
641: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
1.49 nicm 642: setblocking(c->stdin_fd, 1);
1.36 nicm 643: close(c->stdin_fd);
644: c->stdin_fd = -1;
645:
646: if (c->stdin_callback != NULL)
647: c->stdin_callback(c, c->stdin_data);
648: }
649:
650: /* Error callback for client stdout. */
651: void
652: server_client_out_callback(
653: unused struct bufferevent *bufev, unused short what, unused void *data)
654: {
655: struct client *c = data;
656:
657: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
1.49 nicm 658: setblocking(c->stdout_fd, 1);
1.36 nicm 659: close(c->stdout_fd);
660: c->stdout_fd = -1;
661: }
662:
663: /* Error callback for client stderr. */
664: void
665: server_client_err_callback(
666: unused struct bufferevent *bufev, unused short what, unused void *data)
667: {
668: struct client *c = data;
669:
670: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
1.49 nicm 671: setblocking(c->stderr_fd, 1);
1.36 nicm 672: close(c->stderr_fd);
673: c->stderr_fd = -1;
674: }
675:
1.1 nicm 676: /* Dispatch message from client. */
677: int
678: server_client_msg_dispatch(struct client *c)
679: {
680: struct imsg imsg;
681: struct msg_command_data commanddata;
682: struct msg_identify_data identifydata;
683: struct msg_environ_data environdata;
684: ssize_t n, datalen;
685:
1.8 deraadt 686: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
687: return (-1);
1.1 nicm 688:
689: for (;;) {
690: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
691: return (-1);
692: if (n == 0)
693: return (0);
694: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
695:
696: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
697: server_write_client(c, MSG_VERSION, NULL, 0);
698: c->flags |= CLIENT_BAD;
699: imsg_free(&imsg);
700: continue;
701: }
702:
703: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
704: switch (imsg.hdr.type) {
705: case MSG_COMMAND:
706: if (datalen != sizeof commanddata)
707: fatalx("bad MSG_COMMAND size");
708: memcpy(&commanddata, imsg.data, sizeof commanddata);
709:
710: server_client_msg_command(c, &commanddata);
711: break;
712: case MSG_IDENTIFY:
713: if (datalen != sizeof identifydata)
714: fatalx("bad MSG_IDENTIFY size");
715: if (imsg.fd == -1)
716: fatalx("MSG_IDENTIFY missing fd");
717: memcpy(&identifydata, imsg.data, sizeof identifydata);
718:
1.39 nicm 719: c->stdin_fd = imsg.fd;
1.37 nicm 720: c->stdin_event = bufferevent_new(c->stdin_fd,
721: NULL, NULL, server_client_in_callback, c);
1.36 nicm 722: if (c->stdin_event == NULL)
723: fatalx("failed to create stdin event");
1.49 nicm 724: setblocking(c->stdin_fd, 0);
1.36 nicm 725:
1.1 nicm 726: server_client_msg_identify(c, &identifydata, imsg.fd);
727: break;
1.33 nicm 728: case MSG_STDOUT:
729: if (datalen != 0)
730: fatalx("bad MSG_STDOUT size");
731: if (imsg.fd == -1)
732: fatalx("MSG_STDOUT missing fd");
733:
1.36 nicm 734: c->stdout_fd = imsg.fd;
1.37 nicm 735: c->stdout_event = bufferevent_new(c->stdout_fd,
736: NULL, NULL, server_client_out_callback, c);
1.36 nicm 737: if (c->stdout_event == NULL)
738: fatalx("failed to create stdout event");
1.49 nicm 739: setblocking(c->stdout_fd, 0);
1.36 nicm 740:
1.33 nicm 741: break;
742: case MSG_STDERR:
743: if (datalen != 0)
744: fatalx("bad MSG_STDERR size");
745: if (imsg.fd == -1)
746: fatalx("MSG_STDERR missing fd");
747:
1.36 nicm 748: c->stderr_fd = imsg.fd;
1.37 nicm 749: c->stderr_event = bufferevent_new(c->stderr_fd,
750: NULL, NULL, server_client_err_callback, c);
1.36 nicm 751: if (c->stderr_event == NULL)
752: fatalx("failed to create stderr event");
1.49 nicm 753: setblocking(c->stderr_fd, 0);
1.36 nicm 754:
1.33 nicm 755: break;
1.1 nicm 756: case MSG_RESIZE:
757: if (datalen != 0)
758: fatalx("bad MSG_RESIZE size");
759:
1.32 nicm 760: if (tty_resize(&c->tty)) {
761: recalculate_sizes();
762: server_redraw_client(c);
763: }
1.1 nicm 764: break;
765: case MSG_EXITING:
766: if (datalen != 0)
767: fatalx("bad MSG_EXITING size");
768:
769: c->session = NULL;
770: tty_close(&c->tty);
771: server_write_client(c, MSG_EXITED, NULL, 0);
772: break;
773: case MSG_WAKEUP:
774: case MSG_UNLOCK:
775: if (datalen != 0)
776: fatalx("bad MSG_WAKEUP size");
777:
778: if (!(c->flags & CLIENT_SUSPENDED))
779: break;
780: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 781:
1.11 nicm 782: if (gettimeofday(&c->activity_time, NULL) != 0)
783: fatal("gettimeofday");
1.47 nicm 784: if (c->session != NULL)
785: session_update_activity(c->session);
1.10 nicm 786:
1.1 nicm 787: tty_start_tty(&c->tty);
788: server_redraw_client(c);
789: recalculate_sizes();
790: break;
791: case MSG_ENVIRON:
792: if (datalen != sizeof environdata)
793: fatalx("bad MSG_ENVIRON size");
794: memcpy(&environdata, imsg.data, sizeof environdata);
795:
796: environdata.var[(sizeof environdata.var) - 1] = '\0';
797: if (strchr(environdata.var, '=') != NULL)
798: environ_put(&c->environ, environdata.var);
799: break;
800: case MSG_SHELL:
801: if (datalen != 0)
802: fatalx("bad MSG_SHELL size");
803:
804: server_client_msg_shell(c);
805: break;
806: default:
807: fatalx("unexpected message");
808: }
809:
810: imsg_free(&imsg);
811: }
812: }
813:
814: /* Callback to send error message to client. */
815: void printflike2
816: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
817: {
1.33 nicm 818: va_list ap;
1.1 nicm 819:
820: va_start(ap, fmt);
1.36 nicm 821: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 822: va_end(ap);
823:
1.36 nicm 824: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 825: ctx->cmdclient->retcode = 1;
1.1 nicm 826: }
827:
828: /* Callback to send print message to client. */
829: void printflike2
830: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
831: {
1.33 nicm 832: va_list ap;
1.1 nicm 833:
834: va_start(ap, fmt);
1.36 nicm 835: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 836: va_end(ap);
837:
1.36 nicm 838: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 839: }
840:
841: /* Callback to send print message to client, if not quiet. */
842: void printflike2
843: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
844: {
1.33 nicm 845: va_list ap;
1.1 nicm 846:
1.26 nicm 847: if (options_get_number(&global_options, "quiet"))
1.1 nicm 848: return;
849:
850: va_start(ap, fmt);
1.36 nicm 851: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 852: va_end(ap);
853:
1.36 nicm 854: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 855: }
856:
857: /* Handle command message. */
858: void
859: server_client_msg_command(struct client *c, struct msg_command_data *data)
860: {
1.36 nicm 861: struct cmd_ctx ctx;
862: struct cmd_list *cmdlist = NULL;
863: int argc;
864: char **argv, *cause;
1.1 nicm 865:
866: ctx.error = server_client_msg_error;
867: ctx.print = server_client_msg_print;
868: ctx.info = server_client_msg_info;
869:
870: ctx.msgdata = data;
871: ctx.curclient = NULL;
872:
873: ctx.cmdclient = c;
874:
875: argc = data->argc;
876: data->argv[(sizeof data->argv) - 1] = '\0';
877: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
878: server_client_msg_error(&ctx, "command too long");
879: goto error;
880: }
881:
882: if (argc == 0) {
883: argc = 1;
884: argv = xcalloc(1, sizeof *argv);
885: *argv = xstrdup("new-session");
886: }
887:
888: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
889: server_client_msg_error(&ctx, "%s", cause);
890: cmd_free_argv(argc, argv);
891: goto error;
892: }
893: cmd_free_argv(argc, argv);
894:
1.36 nicm 895: if (cmd_list_exec(cmdlist, &ctx) != 1)
896: c->flags |= CLIENT_EXIT;
1.1 nicm 897: cmd_list_free(cmdlist);
898: return;
899:
900: error:
901: if (cmdlist != NULL)
902: cmd_list_free(cmdlist);
1.36 nicm 903: c->flags |= CLIENT_EXIT;
1.1 nicm 904: }
905:
906: /* Handle identify message. */
907: void
908: server_client_msg_identify(
909: struct client *c, struct msg_identify_data *data, int fd)
910: {
1.33 nicm 911: int tty_fd;
912:
1.1 nicm 913: c->cwd = NULL;
914: data->cwd[(sizeof data->cwd) - 1] = '\0';
915: if (*data->cwd != '\0')
916: c->cwd = xstrdup(data->cwd);
917:
1.33 nicm 918: if (!isatty(fd))
919: return;
920: if ((tty_fd = dup(fd)) == -1)
921: fatal("dup failed");
1.1 nicm 922: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 923: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 924: if (data->flags & IDENTIFY_UTF8)
925: c->tty.flags |= TTY_UTF8;
926: if (data->flags & IDENTIFY_256COLOURS)
927: c->tty.term_flags |= TERM_256COLOURS;
928: else if (data->flags & IDENTIFY_88COLOURS)
929: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 930: c->tty.key_callback = server_client_handle_key;
931: c->tty.key_data = c;
1.1 nicm 932:
933: tty_resize(&c->tty);
934:
935: c->flags |= CLIENT_TERMINAL;
936: }
937:
938: /* Handle shell message. */
939: void
940: server_client_msg_shell(struct client *c)
941: {
942: struct msg_shell_data data;
943: const char *shell;
1.25 nicm 944:
1.1 nicm 945: shell = options_get_string(&global_s_options, "default-shell");
946:
947: if (*shell == '\0' || areshell(shell))
948: shell = _PATH_BSHELL;
949: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
950: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 951:
1.1 nicm 952: server_write_client(c, MSG_SHELL, &data, sizeof data);
953: c->flags |= CLIENT_BAD; /* it will die after exec */
954: }
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