Annotation of src/usr.bin/tmux/server-client.c, Revision 1.43
1.43 ! nicm 1: /* $OpenBSD: server-client.c,v 1.42 2010/10/16 08:31:55 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: int mode;
57: u_int i;
58:
59: if ((mode = fcntl(fd, F_GETFL)) == -1)
60: fatal("fcntl failed");
61: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
62: fatal("fcntl failed");
63:
64: c = xcalloc(1, sizeof *c);
65: c->references = 0;
66: imsg_init(&c->ibuf, fd);
1.14 nicm 67: server_update_event(c);
1.25 nicm 68:
1.10 nicm 69: if (gettimeofday(&c->creation_time, NULL) != 0)
1.1 nicm 70: fatal("gettimeofday failed");
1.11 nicm 71: memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
1.1 nicm 72:
1.36 nicm 73: c->stdin_event = NULL;
74: c->stdout_event = NULL;
75: c->stderr_event = NULL;
1.33 nicm 76:
1.1 nicm 77: c->tty.fd = -1;
78: c->title = NULL;
79:
80: c->session = NULL;
81: c->tty.sx = 80;
82: c->tty.sy = 24;
83:
84: screen_init(&c->status, c->tty.sx, 1, 0);
85: job_tree_init(&c->status_jobs);
86:
87: c->message_string = NULL;
1.21 nicm 88: ARRAY_INIT(&c->message_log);
1.1 nicm 89:
90: c->prompt_string = NULL;
91: c->prompt_buffer = NULL;
92: c->prompt_index = 0;
93:
1.17 nicm 94: evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
95:
1.1 nicm 96: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
97: if (ARRAY_ITEM(&clients, i) == NULL) {
98: ARRAY_SET(&clients, i, c);
99: return;
100: }
101: }
102: ARRAY_ADD(&clients, c);
103: log_debug("new client %d", fd);
104: }
105:
106: /* Lost a client. */
107: void
108: server_client_lost(struct client *c)
109: {
1.21 nicm 110: struct message_entry *msg;
111: u_int i;
1.1 nicm 112:
113: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
114: if (ARRAY_ITEM(&clients, i) == c)
115: ARRAY_SET(&clients, i, NULL);
116: }
117: log_debug("lost client %d", c->ibuf.fd);
118:
119: /*
120: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
121: * and tty_free might close an unrelated fd.
122: */
123: if (c->flags & CLIENT_TERMINAL)
124: tty_free(&c->tty);
125:
1.36 nicm 126: if (c->stdin_fd != -1)
127: close(c->stdin_fd);
128: if (c->stdin_event != NULL)
129: bufferevent_free(c->stdin_event);
130: if (c->stdout_fd != -1)
131: close(c->stdout_fd);
132: if (c->stdout_event != NULL)
133: bufferevent_free(c->stdout_event);
134: if (c->stderr_fd != -1)
135: close(c->stderr_fd);
136: if (c->stderr_event != NULL)
137: bufferevent_free(c->stderr_event);
1.33 nicm 138:
1.1 nicm 139: screen_free(&c->status);
140: job_tree_free(&c->status_jobs);
141:
142: if (c->title != NULL)
143: xfree(c->title);
144:
1.17 nicm 145: evtimer_del(&c->repeat_timer);
146:
1.15 nicm 147: evtimer_del(&c->identify_timer);
148:
1.1 nicm 149: if (c->message_string != NULL)
150: xfree(c->message_string);
1.15 nicm 151: evtimer_del(&c->message_timer);
1.21 nicm 152: for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
153: msg = &ARRAY_ITEM(&c->message_log, i);
154: xfree(msg->msg);
155: }
156: ARRAY_FREE(&c->message_log);
1.1 nicm 157:
158: if (c->prompt_string != NULL)
159: xfree(c->prompt_string);
160: if (c->prompt_buffer != NULL)
161: xfree(c->prompt_buffer);
162:
163: if (c->cwd != NULL)
164: xfree(c->cwd);
165:
166: close(c->ibuf.fd);
167: imsg_clear(&c->ibuf);
1.12 nicm 168: event_del(&c->event);
1.13 nicm 169:
1.1 nicm 170: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
171: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
172: ARRAY_SET(&dead_clients, i, c);
173: break;
174: }
175: }
176: if (i == ARRAY_LENGTH(&dead_clients))
177: ARRAY_ADD(&dead_clients, c);
178: c->flags |= CLIENT_DEAD;
179:
180: recalculate_sizes();
1.41 nicm 181: server_check_unattached();
1.19 nicm 182: server_update_socket();
1.9 nicm 183: }
184:
1.1 nicm 185: /* Process a single client event. */
186: void
1.12 nicm 187: server_client_callback(int fd, short events, void *data)
1.1 nicm 188: {
189: struct client *c = data;
1.7 nicm 190:
191: if (c->flags & CLIENT_DEAD)
192: return;
1.1 nicm 193:
194: if (fd == c->ibuf.fd) {
1.12 nicm 195: if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
1.1 nicm 196: goto client_lost;
197:
198: if (c->flags & CLIENT_BAD) {
199: if (c->ibuf.w.queued == 0)
200: goto client_lost;
201: return;
202: }
203:
1.12 nicm 204: if (events & EV_READ && server_client_msg_dispatch(c) != 0)
1.1 nicm 205: goto client_lost;
206: }
1.14 nicm 207:
1.25 nicm 208: server_update_event(c);
1.1 nicm 209: return;
210:
211: client_lost:
212: server_client_lost(c);
213: }
214:
1.16 nicm 215: /* Handle client status timer. */
216: void
217: server_client_status_timer(void)
218: {
219: struct client *c;
220: struct session *s;
221: struct job *job;
222: struct timeval tv;
1.20 nicm 223: u_int i;
224: int interval;
225: time_t difference;
1.16 nicm 226:
227: if (gettimeofday(&tv, NULL) != 0)
228: fatal("gettimeofday failed");
229:
230: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
231: c = ARRAY_ITEM(&clients, i);
232: if (c == NULL || c->session == NULL)
233: continue;
234: if (c->message_string != NULL || c->prompt_string != NULL) {
235: /*
236: * Don't need timed redraw for messages/prompts so bail
237: * now. The status timer isn't reset when they are
238: * redrawn anyway.
239: */
240: continue;
241: }
242: s = c->session;
243:
244: if (!options_get_number(&s->options, "status"))
245: continue;
246: interval = options_get_number(&s->options, "status-interval");
247:
1.20 nicm 248: difference = tv.tv_sec - c->status_timer.tv_sec;
249: if (difference >= interval) {
1.16 nicm 250: RB_FOREACH(job, jobs, &c->status_jobs)
1.20 nicm 251: job_run(job);
1.16 nicm 252: c->flags |= CLIENT_STATUS;
253: }
254: }
255: }
256:
1.18 nicm 257: /* Handle data key input from client. */
258: void
259: server_client_handle_key(int key, struct mouse_event *mouse, void *data)
260: {
261: struct client *c = data;
262: struct session *s;
263: struct window *w;
264: struct window_pane *wp;
265: struct options *oo;
266: struct timeval tv;
267: struct key_binding *bd;
268: struct keylist *keylist;
269: int xtimeout, isprefix;
270: u_int i;
271:
272: /* Check the client is good to accept input. */
273: if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
274: return;
275: if (c->session == NULL)
276: return;
277: s = c->session;
278:
279: /* Update the activity timer. */
280: if (gettimeofday(&c->activity_time, NULL) != 0)
281: fatal("gettimeofday failed");
282: memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
283:
284: w = c->session->curw->window;
285: wp = w->active;
286: oo = &c->session->options;
287:
288: /* Special case: number keys jump to pane in identify mode. */
1.25 nicm 289: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
1.30 nicm 290: if (c->flags & CLIENT_READONLY)
291: return;
1.18 nicm 292: wp = window_pane_at_index(w, key - '0');
293: if (wp != NULL && window_pane_visible(wp))
294: window_set_active_pane(w, wp);
295: server_clear_identify(c);
296: return;
297: }
298:
299: /* Handle status line. */
1.30 nicm 300: if (!(c->flags & CLIENT_READONLY)) {
301: status_message_clear(c);
302: server_clear_identify(c);
303: }
1.18 nicm 304: if (c->prompt_string != NULL) {
1.30 nicm 305: if (!(c->flags & CLIENT_READONLY))
306: status_prompt_key(c, key);
1.18 nicm 307: return;
308: }
309:
310: /* Check for mouse keys. */
311: if (key == KEYC_MOUSE) {
1.30 nicm 312: if (c->flags & CLIENT_READONLY)
313: return;
1.18 nicm 314: if (options_get_number(oo, "mouse-select-pane")) {
315: window_set_active_at(w, mouse->x, mouse->y);
1.28 nicm 316: server_redraw_window_borders(w);
1.18 nicm 317: wp = w->active;
318: }
1.31 nicm 319: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 320: return;
321: }
322:
323: /* Is this a prefix key? */
324: keylist = options_get_data(&c->session->options, "prefix");
325: isprefix = 0;
326: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
327: if (key == ARRAY_ITEM(keylist, i)) {
328: isprefix = 1;
329: break;
330: }
331: }
332:
333: /* No previous prefix key. */
334: if (!(c->flags & CLIENT_PREFIX)) {
335: if (isprefix)
336: c->flags |= CLIENT_PREFIX;
337: else {
338: /* Try as a non-prefix key binding. */
1.30 nicm 339: if ((bd = key_bindings_lookup(key)) == NULL) {
340: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 341: window_pane_key(wp, c->session, key);
1.30 nicm 342: } else
1.18 nicm 343: key_bindings_dispatch(bd, c);
344: }
345: return;
346: }
347:
348: /* Prefix key already pressed. Reset prefix and lookup key. */
349: c->flags &= ~CLIENT_PREFIX;
350: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
351: /* If repeating, treat this as a key, else ignore. */
352: if (c->flags & CLIENT_REPEAT) {
353: c->flags &= ~CLIENT_REPEAT;
354: if (isprefix)
355: c->flags |= CLIENT_PREFIX;
1.30 nicm 356: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 357: window_pane_key(wp, c->session, key);
1.18 nicm 358: }
359: return;
360: }
361:
362: /* If already repeating, but this key can't repeat, skip it. */
363: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
364: c->flags &= ~CLIENT_REPEAT;
365: if (isprefix)
366: c->flags |= CLIENT_PREFIX;
1.30 nicm 367: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 368: window_pane_key(wp, c->session, key);
1.18 nicm 369: return;
370: }
371:
372: /* If this key can repeat, reset the repeat flags and timer. */
373: xtimeout = options_get_number(&c->session->options, "repeat-time");
374: if (xtimeout != 0 && bd->can_repeat) {
375: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 376:
1.18 nicm 377: tv.tv_sec = xtimeout / 1000;
378: tv.tv_usec = (xtimeout % 1000) * 1000L;
379: evtimer_del(&c->repeat_timer);
380: evtimer_add(&c->repeat_timer, &tv);
381: }
382:
383: /* Dispatch the command. */
384: key_bindings_dispatch(bd, c);
385: }
386:
1.2 nicm 387: /* Client functions that need to happen every loop. */
388: void
389: server_client_loop(void)
390: {
391: struct client *c;
392: struct window *w;
393: struct window_pane *wp;
394: u_int i;
395:
396: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
397: c = ARRAY_ITEM(&clients, i);
1.36 nicm 398: if (c == NULL)
1.2 nicm 399: continue;
400:
1.36 nicm 401: server_client_check_exit(c);
402: if (c->session != NULL) {
403: server_client_check_redraw(c);
404: server_client_reset_state(c);
405: }
1.2 nicm 406: }
407:
408: /*
409: * Any windows will have been redrawn as part of clients, so clear
410: * their flags now.
411: */
412: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
413: w = ARRAY_ITEM(&windows, i);
414: if (w == NULL)
415: continue;
416:
417: w->flags &= ~WINDOW_REDRAW;
418: TAILQ_FOREACH(wp, &w->panes, entry)
419: wp->flags &= ~PANE_REDRAW;
420: }
421: }
422:
1.18 nicm 423: /*
424: * Update cursor position and mode settings. The scroll region and attributes
425: * are cleared when idle (waiting for an event) as this is the most likely time
426: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
427: * compromise between excessive resets and likelihood of an interrupt.
428: *
429: * tty_region/tty_reset/tty_update_mode already take care of not resetting
430: * things that are already in their default state.
431: */
1.1 nicm 432: void
1.18 nicm 433: server_client_reset_state(struct client *c)
1.1 nicm 434: {
1.18 nicm 435: struct window *w = c->session->curw->window;
436: struct window_pane *wp = w->active;
437: struct screen *s = wp->screen;
438: struct options *oo = &c->session->options;
439: int status, mode;
1.1 nicm 440:
441: tty_region(&c->tty, 0, c->tty.sy - 1);
442:
443: status = options_get_number(oo, "status");
444: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
445: tty_cursor(&c->tty, 0, 0);
446: else
447: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
448:
449: mode = s->mode;
450: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
451: options_get_number(oo, "mouse-select-pane"))
452: mode |= MODE_MOUSE;
453: tty_update_mode(&c->tty, mode);
454: tty_reset(&c->tty);
1.17 nicm 455: }
456:
457: /* Repeat time callback. */
1.24 nicm 458: /* ARGSUSED */
1.17 nicm 459: void
460: server_client_repeat_timer(unused int fd, unused short events, void *data)
461: {
462: struct client *c = data;
463:
464: if (c->flags & CLIENT_REPEAT)
465: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 466: }
467:
1.36 nicm 468: /* Check if client should be exited. */
469: void
470: server_client_check_exit(struct client *c)
471: {
472: struct msg_exit_data exitdata;
473:
474: if (!(c->flags & CLIENT_EXIT))
475: return;
476:
477: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
478: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
479: return;
480: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
481: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
482: return;
483:
484: exitdata.retcode = c->retcode;
485: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
486:
487: c->flags &= ~CLIENT_EXIT;
488: }
489:
1.38 nicm 490: /*
491: * Check if the client should backoff. During backoff, data from external
492: * programs is not written to the terminal. When the existing data drains, the
493: * client is redrawn.
494: *
495: * There are two backoff phases - both the tty and client have backoff flags -
496: * the first to allow existing data to drain and the latter to ensure backoff
497: * is disabled until the redraw has finished and prevent the redraw triggering
498: * another backoff.
499: */
500: void
501: server_client_check_backoff(struct client *c)
502: {
503: struct tty *tty = &c->tty;
504: size_t used;
505:
506: used = EVBUFFER_LENGTH(tty->event->output);
507:
508: /*
509: * If in the second backoff phase (redrawing), don't check backoff
510: * until the redraw has completed (or enough of it to drop below the
511: * backoff threshold).
512: */
513: if (c->flags & CLIENT_BACKOFF) {
514: if (used > BACKOFF_THRESHOLD)
515: return;
516: c->flags &= ~CLIENT_BACKOFF;
517: return;
518: }
519:
520: /* Once drained, allow data through again and schedule redraw. */
521: if (tty->flags & TTY_BACKOFF) {
522: if (used != 0)
523: return;
524: tty->flags &= ~TTY_BACKOFF;
525: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
526: return;
527: }
528:
529: /* If too much data, start backoff. */
530: if (used > BACKOFF_THRESHOLD)
531: tty->flags |= TTY_BACKOFF;
532: }
533:
1.1 nicm 534: /* Check for client redraws. */
535: void
536: server_client_check_redraw(struct client *c)
537: {
538: struct session *s = c->session;
539: struct window_pane *wp;
540: int flags, redraw;
541:
542: flags = c->tty.flags & TTY_FREEZE;
543: c->tty.flags &= ~TTY_FREEZE;
544:
545: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
546: if (options_get_number(&s->options, "set-titles"))
547: server_client_set_title(c);
1.12 nicm 548:
1.1 nicm 549: if (c->message_string != NULL)
550: redraw = status_message_redraw(c);
551: else if (c->prompt_string != NULL)
552: redraw = status_prompt_redraw(c);
553: else
554: redraw = status_redraw(c);
555: if (!redraw)
556: c->flags &= ~CLIENT_STATUS;
557: }
558:
559: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 560: screen_redraw_screen(c, 0, 0);
561: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 562: } else if (c->flags & CLIENT_REDRAWWINDOW) {
563: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
564: screen_redraw_pane(c, wp);
565: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 566: } else {
567: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
568: if (wp->flags & PANE_REDRAW)
569: screen_redraw_pane(c, wp);
570: }
571: }
572:
1.27 nicm 573: if (c->flags & CLIENT_BORDERS)
574: screen_redraw_screen(c, 0, 1);
575:
1.1 nicm 576: if (c->flags & CLIENT_STATUS)
1.27 nicm 577: screen_redraw_screen(c, 1, 0);
1.1 nicm 578:
579: c->tty.flags |= flags;
580:
1.27 nicm 581: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 582: }
583:
584: /* Set client title. */
585: void
586: server_client_set_title(struct client *c)
587: {
588: struct session *s = c->session;
589: const char *template;
590: char *title;
591:
592: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 593:
1.23 nicm 594: title = status_replace(c, NULL, template, time(NULL), 1);
1.1 nicm 595: if (c->title == NULL || strcmp(title, c->title) != 0) {
596: if (c->title != NULL)
597: xfree(c->title);
598: c->title = xstrdup(title);
599: tty_set_title(&c->tty, c->title);
600: }
601: xfree(title);
602: }
603:
1.36 nicm 604: /*
605: * Error callback for client stdin. Caller must increase reference count when
606: * enabling event!
607: */
608: void
609: server_client_in_callback(
610: unused struct bufferevent *bufev, unused short what, void *data)
611: {
612: struct client *c = data;
613:
614: c->references--;
615: if (c->flags & CLIENT_DEAD)
616: return;
617:
618: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
619: close(c->stdin_fd);
620: c->stdin_fd = -1;
621:
622: if (c->stdin_callback != NULL)
623: c->stdin_callback(c, c->stdin_data);
624: }
625:
626: /* Error callback for client stdout. */
627: void
628: server_client_out_callback(
629: unused struct bufferevent *bufev, unused short what, unused void *data)
630: {
631: struct client *c = data;
632:
633: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
634: close(c->stdout_fd);
635: c->stdout_fd = -1;
636: }
637:
638: /* Error callback for client stderr. */
639: void
640: server_client_err_callback(
641: unused struct bufferevent *bufev, unused short what, unused void *data)
642: {
643: struct client *c = data;
644:
645: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
646: close(c->stderr_fd);
647: c->stderr_fd = -1;
648: }
649:
1.1 nicm 650: /* Dispatch message from client. */
651: int
652: server_client_msg_dispatch(struct client *c)
653: {
654: struct imsg imsg;
655: struct msg_command_data commanddata;
656: struct msg_identify_data identifydata;
657: struct msg_environ_data environdata;
658: ssize_t n, datalen;
1.36 nicm 659: int mode;
1.1 nicm 660:
1.8 deraadt 661: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
662: return (-1);
1.1 nicm 663:
664: for (;;) {
665: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
666: return (-1);
667: if (n == 0)
668: return (0);
669: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
670:
671: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
672: server_write_client(c, MSG_VERSION, NULL, 0);
673: c->flags |= CLIENT_BAD;
674: imsg_free(&imsg);
675: continue;
676: }
677:
678: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
679: switch (imsg.hdr.type) {
680: case MSG_COMMAND:
681: if (datalen != sizeof commanddata)
682: fatalx("bad MSG_COMMAND size");
683: memcpy(&commanddata, imsg.data, sizeof commanddata);
684:
685: server_client_msg_command(c, &commanddata);
686: break;
687: case MSG_IDENTIFY:
688: if (datalen != sizeof identifydata)
689: fatalx("bad MSG_IDENTIFY size");
690: if (imsg.fd == -1)
691: fatalx("MSG_IDENTIFY missing fd");
692: memcpy(&identifydata, imsg.data, sizeof identifydata);
693:
1.39 nicm 694: c->stdin_fd = imsg.fd;
1.37 nicm 695: c->stdin_event = bufferevent_new(c->stdin_fd,
696: NULL, NULL, server_client_in_callback, c);
1.36 nicm 697: if (c->stdin_event == NULL)
698: fatalx("failed to create stdin event");
699:
1.39 nicm 700: if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
701: fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
1.36 nicm 702:
1.1 nicm 703: server_client_msg_identify(c, &identifydata, imsg.fd);
704: break;
1.33 nicm 705: case MSG_STDOUT:
706: if (datalen != 0)
707: fatalx("bad MSG_STDOUT size");
708: if (imsg.fd == -1)
709: fatalx("MSG_STDOUT missing fd");
710:
1.36 nicm 711: c->stdout_fd = imsg.fd;
1.37 nicm 712: c->stdout_event = bufferevent_new(c->stdout_fd,
713: NULL, NULL, server_client_out_callback, c);
1.36 nicm 714: if (c->stdout_event == NULL)
715: fatalx("failed to create stdout event");
716:
1.37 nicm 717: if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
718: fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 719: break;
720: case MSG_STDERR:
721: if (datalen != 0)
722: fatalx("bad MSG_STDERR size");
723: if (imsg.fd == -1)
724: fatalx("MSG_STDERR missing fd");
725:
1.36 nicm 726: c->stderr_fd = imsg.fd;
1.37 nicm 727: c->stderr_event = bufferevent_new(c->stderr_fd,
728: NULL, NULL, server_client_err_callback, c);
1.36 nicm 729: if (c->stderr_event == NULL)
730: fatalx("failed to create stderr event");
731:
1.37 nicm 732: if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
733: fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 734: break;
1.1 nicm 735: case MSG_RESIZE:
736: if (datalen != 0)
737: fatalx("bad MSG_RESIZE size");
738:
1.32 nicm 739: if (tty_resize(&c->tty)) {
740: recalculate_sizes();
741: server_redraw_client(c);
742: }
1.1 nicm 743: break;
744: case MSG_EXITING:
745: if (datalen != 0)
746: fatalx("bad MSG_EXITING size");
747:
748: c->session = NULL;
749: tty_close(&c->tty);
750: server_write_client(c, MSG_EXITED, NULL, 0);
751: break;
752: case MSG_WAKEUP:
753: case MSG_UNLOCK:
754: if (datalen != 0)
755: fatalx("bad MSG_WAKEUP size");
756:
757: if (!(c->flags & CLIENT_SUSPENDED))
758: break;
759: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 760:
1.11 nicm 761: if (gettimeofday(&c->activity_time, NULL) != 0)
762: fatal("gettimeofday");
763: if (c->session != NULL) {
764: memcpy(&c->session->activity_time,
765: &c->activity_time,
766: sizeof c->session->activity_time);
767: }
1.10 nicm 768:
1.1 nicm 769: tty_start_tty(&c->tty);
770: server_redraw_client(c);
771: recalculate_sizes();
772: break;
773: case MSG_ENVIRON:
774: if (datalen != sizeof environdata)
775: fatalx("bad MSG_ENVIRON size");
776: memcpy(&environdata, imsg.data, sizeof environdata);
777:
778: environdata.var[(sizeof environdata.var) - 1] = '\0';
779: if (strchr(environdata.var, '=') != NULL)
780: environ_put(&c->environ, environdata.var);
781: break;
782: case MSG_SHELL:
783: if (datalen != 0)
784: fatalx("bad MSG_SHELL size");
785:
786: server_client_msg_shell(c);
787: break;
788: default:
789: fatalx("unexpected message");
790: }
791:
792: imsg_free(&imsg);
793: }
794: }
795:
796: /* Callback to send error message to client. */
797: void printflike2
798: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
799: {
1.33 nicm 800: va_list ap;
1.1 nicm 801:
802: va_start(ap, fmt);
1.36 nicm 803: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 804: va_end(ap);
805:
1.36 nicm 806: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 807: ctx->cmdclient->retcode = 1;
1.1 nicm 808: }
809:
810: /* Callback to send print message to client. */
811: void printflike2
812: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
813: {
1.33 nicm 814: va_list ap;
1.1 nicm 815:
816: va_start(ap, fmt);
1.36 nicm 817: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 818: va_end(ap);
819:
1.36 nicm 820: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 821: }
822:
823: /* Callback to send print message to client, if not quiet. */
824: void printflike2
825: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
826: {
1.33 nicm 827: va_list ap;
1.1 nicm 828:
1.26 nicm 829: if (options_get_number(&global_options, "quiet"))
1.1 nicm 830: return;
831:
832: va_start(ap, fmt);
1.36 nicm 833: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 834: va_end(ap);
835:
1.36 nicm 836: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 837: }
838:
839: /* Handle command message. */
840: void
841: server_client_msg_command(struct client *c, struct msg_command_data *data)
842: {
1.36 nicm 843: struct cmd_ctx ctx;
844: struct cmd_list *cmdlist = NULL;
845: int argc;
846: char **argv, *cause;
1.1 nicm 847:
848: ctx.error = server_client_msg_error;
849: ctx.print = server_client_msg_print;
850: ctx.info = server_client_msg_info;
851:
852: ctx.msgdata = data;
853: ctx.curclient = NULL;
854:
855: ctx.cmdclient = c;
856:
857: argc = data->argc;
858: data->argv[(sizeof data->argv) - 1] = '\0';
859: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
860: server_client_msg_error(&ctx, "command too long");
861: goto error;
862: }
863:
864: if (argc == 0) {
865: argc = 1;
866: argv = xcalloc(1, sizeof *argv);
867: *argv = xstrdup("new-session");
868: }
869:
870: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
871: server_client_msg_error(&ctx, "%s", cause);
872: cmd_free_argv(argc, argv);
873: goto error;
874: }
875: cmd_free_argv(argc, argv);
876:
1.36 nicm 877: if (cmd_list_exec(cmdlist, &ctx) != 1)
878: c->flags |= CLIENT_EXIT;
1.1 nicm 879: cmd_list_free(cmdlist);
880: return;
881:
882: error:
883: if (cmdlist != NULL)
884: cmd_list_free(cmdlist);
1.36 nicm 885: c->flags |= CLIENT_EXIT;
1.1 nicm 886: }
887:
888: /* Handle identify message. */
889: void
890: server_client_msg_identify(
891: struct client *c, struct msg_identify_data *data, int fd)
892: {
1.33 nicm 893: int tty_fd;
894:
1.1 nicm 895: c->cwd = NULL;
896: data->cwd[(sizeof data->cwd) - 1] = '\0';
897: if (*data->cwd != '\0')
898: c->cwd = xstrdup(data->cwd);
899:
1.33 nicm 900: if (!isatty(fd))
901: return;
902: if ((tty_fd = dup(fd)) == -1)
903: fatal("dup failed");
1.1 nicm 904: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 905: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 906: if (data->flags & IDENTIFY_UTF8)
907: c->tty.flags |= TTY_UTF8;
908: if (data->flags & IDENTIFY_256COLOURS)
909: c->tty.term_flags |= TERM_256COLOURS;
910: else if (data->flags & IDENTIFY_88COLOURS)
911: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 912: c->tty.key_callback = server_client_handle_key;
913: c->tty.key_data = c;
1.1 nicm 914:
915: tty_resize(&c->tty);
916:
917: c->flags |= CLIENT_TERMINAL;
918: }
919:
920: /* Handle shell message. */
921: void
922: server_client_msg_shell(struct client *c)
923: {
924: struct msg_shell_data data;
925: const char *shell;
1.25 nicm 926:
1.1 nicm 927: shell = options_get_string(&global_s_options, "default-shell");
928:
929: if (*shell == '\0' || areshell(shell))
930: shell = _PATH_BSHELL;
931: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
932: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 933:
1.1 nicm 934: server_write_client(c, MSG_SHELL, &data, sizeof data);
935: c->flags |= CLIENT_BAD; /* it will die after exec */
936: }
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