Annotation of src/usr.bin/tmux/server-client.c, Revision 1.41
1.41 ! nicm 1: /* $OpenBSD: server-client.c,v 1.40 2010/08/31 22:46:59 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: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
64: fatal("fcntl failed");
65:
66: c = xcalloc(1, sizeof *c);
67: c->references = 0;
68: imsg_init(&c->ibuf, fd);
1.14 nicm 69: server_update_event(c);
1.25 nicm 70:
1.10 nicm 71: if (gettimeofday(&c->creation_time, NULL) != 0)
1.1 nicm 72: fatal("gettimeofday failed");
1.11 nicm 73: memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
1.1 nicm 74:
75: ARRAY_INIT(&c->prompt_hdata);
76:
1.36 nicm 77: c->stdin_event = NULL;
78: c->stdout_event = NULL;
79: c->stderr_event = NULL;
1.33 nicm 80:
1.1 nicm 81: c->tty.fd = -1;
82: c->title = NULL;
83:
84: c->session = NULL;
85: c->tty.sx = 80;
86: c->tty.sy = 24;
87:
88: screen_init(&c->status, c->tty.sx, 1, 0);
89: job_tree_init(&c->status_jobs);
90:
91: c->message_string = NULL;
1.21 nicm 92: ARRAY_INIT(&c->message_log);
1.1 nicm 93:
94: c->prompt_string = NULL;
95: c->prompt_buffer = NULL;
96: c->prompt_index = 0;
97:
1.17 nicm 98: evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
99:
1.1 nicm 100: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
101: if (ARRAY_ITEM(&clients, i) == NULL) {
102: ARRAY_SET(&clients, i, c);
103: return;
104: }
105: }
106: ARRAY_ADD(&clients, c);
107: log_debug("new client %d", fd);
108: }
109:
110: /* Lost a client. */
111: void
112: server_client_lost(struct client *c)
113: {
1.21 nicm 114: struct message_entry *msg;
115: u_int i;
1.1 nicm 116:
117: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
118: if (ARRAY_ITEM(&clients, i) == c)
119: ARRAY_SET(&clients, i, NULL);
120: }
121: log_debug("lost client %d", c->ibuf.fd);
122:
123: /*
124: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
125: * and tty_free might close an unrelated fd.
126: */
127: if (c->flags & CLIENT_TERMINAL)
128: tty_free(&c->tty);
129:
1.36 nicm 130: if (c->stdin_fd != -1)
131: close(c->stdin_fd);
132: if (c->stdin_event != NULL)
133: bufferevent_free(c->stdin_event);
134: if (c->stdout_fd != -1)
135: close(c->stdout_fd);
136: if (c->stdout_event != NULL)
137: bufferevent_free(c->stdout_event);
138: if (c->stderr_fd != -1)
139: close(c->stderr_fd);
140: if (c->stderr_event != NULL)
141: bufferevent_free(c->stderr_event);
1.33 nicm 142:
1.1 nicm 143: screen_free(&c->status);
144: job_tree_free(&c->status_jobs);
145:
146: if (c->title != NULL)
147: xfree(c->title);
148:
1.17 nicm 149: evtimer_del(&c->repeat_timer);
150:
1.15 nicm 151: evtimer_del(&c->identify_timer);
152:
1.1 nicm 153: if (c->message_string != NULL)
154: xfree(c->message_string);
1.15 nicm 155: evtimer_del(&c->message_timer);
1.21 nicm 156: for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
157: msg = &ARRAY_ITEM(&c->message_log, i);
158: xfree(msg->msg);
159: }
160: ARRAY_FREE(&c->message_log);
1.1 nicm 161:
162: if (c->prompt_string != NULL)
163: xfree(c->prompt_string);
164: if (c->prompt_buffer != NULL)
165: xfree(c->prompt_buffer);
166: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
167: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
168: ARRAY_FREE(&c->prompt_hdata);
169:
170: if (c->cwd != NULL)
171: xfree(c->cwd);
172:
173: close(c->ibuf.fd);
174: imsg_clear(&c->ibuf);
1.12 nicm 175: event_del(&c->event);
1.13 nicm 176:
1.1 nicm 177: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
178: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
179: ARRAY_SET(&dead_clients, i, c);
180: break;
181: }
182: }
183: if (i == ARRAY_LENGTH(&dead_clients))
184: ARRAY_ADD(&dead_clients, c);
185: c->flags |= CLIENT_DEAD;
186:
187: recalculate_sizes();
1.41 ! nicm 188: server_check_unattached();
1.19 nicm 189: server_update_socket();
1.9 nicm 190: }
191:
1.1 nicm 192: /* Process a single client event. */
193: void
1.12 nicm 194: server_client_callback(int fd, short events, void *data)
1.1 nicm 195: {
196: struct client *c = data;
1.7 nicm 197:
198: if (c->flags & CLIENT_DEAD)
199: return;
1.1 nicm 200:
201: if (fd == c->ibuf.fd) {
1.12 nicm 202: if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
1.1 nicm 203: goto client_lost;
204:
205: if (c->flags & CLIENT_BAD) {
206: if (c->ibuf.w.queued == 0)
207: goto client_lost;
208: return;
209: }
210:
1.12 nicm 211: if (events & EV_READ && server_client_msg_dispatch(c) != 0)
1.1 nicm 212: goto client_lost;
213: }
1.14 nicm 214:
1.25 nicm 215: server_update_event(c);
1.1 nicm 216: return;
217:
218: client_lost:
219: server_client_lost(c);
220: }
221:
1.16 nicm 222: /* Handle client status timer. */
223: void
224: server_client_status_timer(void)
225: {
226: struct client *c;
227: struct session *s;
228: struct job *job;
229: struct timeval tv;
1.20 nicm 230: u_int i;
231: int interval;
232: time_t difference;
1.16 nicm 233:
234: if (gettimeofday(&tv, NULL) != 0)
235: fatal("gettimeofday failed");
236:
237: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
238: c = ARRAY_ITEM(&clients, i);
239: if (c == NULL || c->session == NULL)
240: continue;
241: if (c->message_string != NULL || c->prompt_string != NULL) {
242: /*
243: * Don't need timed redraw for messages/prompts so bail
244: * now. The status timer isn't reset when they are
245: * redrawn anyway.
246: */
247: continue;
248: }
249: s = c->session;
250:
251: if (!options_get_number(&s->options, "status"))
252: continue;
253: interval = options_get_number(&s->options, "status-interval");
254:
1.20 nicm 255: difference = tv.tv_sec - c->status_timer.tv_sec;
256: if (difference >= interval) {
1.16 nicm 257: RB_FOREACH(job, jobs, &c->status_jobs)
1.20 nicm 258: job_run(job);
1.16 nicm 259: c->flags |= CLIENT_STATUS;
260: }
261: }
262: }
263:
1.18 nicm 264: /* Handle data key input from client. */
265: void
266: server_client_handle_key(int key, struct mouse_event *mouse, void *data)
267: {
268: struct client *c = data;
269: struct session *s;
270: struct window *w;
271: struct window_pane *wp;
272: struct options *oo;
273: struct timeval tv;
274: struct key_binding *bd;
275: struct keylist *keylist;
276: int xtimeout, isprefix;
277: u_int i;
278:
279: /* Check the client is good to accept input. */
280: if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
281: return;
282: if (c->session == NULL)
283: return;
284: s = c->session;
285:
286: /* Update the activity timer. */
287: if (gettimeofday(&c->activity_time, NULL) != 0)
288: fatal("gettimeofday failed");
289: memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
290:
291: w = c->session->curw->window;
292: wp = w->active;
293: oo = &c->session->options;
294:
295: /* Special case: number keys jump to pane in identify mode. */
1.25 nicm 296: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
1.30 nicm 297: if (c->flags & CLIENT_READONLY)
298: return;
1.18 nicm 299: wp = window_pane_at_index(w, key - '0');
300: if (wp != NULL && window_pane_visible(wp))
301: window_set_active_pane(w, wp);
302: server_clear_identify(c);
303: return;
304: }
305:
306: /* Handle status line. */
1.30 nicm 307: if (!(c->flags & CLIENT_READONLY)) {
308: status_message_clear(c);
309: server_clear_identify(c);
310: }
1.18 nicm 311: if (c->prompt_string != NULL) {
1.30 nicm 312: if (!(c->flags & CLIENT_READONLY))
313: status_prompt_key(c, key);
1.18 nicm 314: return;
315: }
316:
317: /* Check for mouse keys. */
318: if (key == KEYC_MOUSE) {
1.30 nicm 319: if (c->flags & CLIENT_READONLY)
320: return;
1.18 nicm 321: if (options_get_number(oo, "mouse-select-pane")) {
322: window_set_active_at(w, mouse->x, mouse->y);
1.28 nicm 323: server_redraw_window_borders(w);
1.18 nicm 324: wp = w->active;
325: }
1.31 nicm 326: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 327: return;
328: }
329:
330: /* Is this a prefix key? */
331: keylist = options_get_data(&c->session->options, "prefix");
332: isprefix = 0;
333: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
334: if (key == ARRAY_ITEM(keylist, i)) {
335: isprefix = 1;
336: break;
337: }
338: }
339:
340: /* No previous prefix key. */
341: if (!(c->flags & CLIENT_PREFIX)) {
342: if (isprefix)
343: c->flags |= CLIENT_PREFIX;
344: else {
345: /* Try as a non-prefix key binding. */
1.30 nicm 346: if ((bd = key_bindings_lookup(key)) == NULL) {
347: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 348: window_pane_key(wp, c->session, key);
1.30 nicm 349: } else
1.18 nicm 350: key_bindings_dispatch(bd, c);
351: }
352: return;
353: }
354:
355: /* Prefix key already pressed. Reset prefix and lookup key. */
356: c->flags &= ~CLIENT_PREFIX;
357: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
358: /* If repeating, treat this as a key, else ignore. */
359: if (c->flags & CLIENT_REPEAT) {
360: c->flags &= ~CLIENT_REPEAT;
361: if (isprefix)
362: c->flags |= CLIENT_PREFIX;
1.30 nicm 363: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 364: window_pane_key(wp, c->session, key);
1.18 nicm 365: }
366: return;
367: }
368:
369: /* If already repeating, but this key can't repeat, skip it. */
370: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
371: c->flags &= ~CLIENT_REPEAT;
372: if (isprefix)
373: c->flags |= CLIENT_PREFIX;
1.30 nicm 374: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 375: window_pane_key(wp, c->session, key);
1.18 nicm 376: return;
377: }
378:
379: /* If this key can repeat, reset the repeat flags and timer. */
380: xtimeout = options_get_number(&c->session->options, "repeat-time");
381: if (xtimeout != 0 && bd->can_repeat) {
382: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 383:
1.18 nicm 384: tv.tv_sec = xtimeout / 1000;
385: tv.tv_usec = (xtimeout % 1000) * 1000L;
386: evtimer_del(&c->repeat_timer);
387: evtimer_add(&c->repeat_timer, &tv);
388: }
389:
390: /* Dispatch the command. */
391: key_bindings_dispatch(bd, c);
392: }
393:
1.2 nicm 394: /* Client functions that need to happen every loop. */
395: void
396: server_client_loop(void)
397: {
398: struct client *c;
399: struct window *w;
400: struct window_pane *wp;
401: u_int i;
402:
403: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
404: c = ARRAY_ITEM(&clients, i);
1.36 nicm 405: if (c == NULL)
1.2 nicm 406: continue;
407:
1.36 nicm 408: server_client_check_exit(c);
409: if (c->session != NULL) {
410: server_client_check_redraw(c);
411: server_client_reset_state(c);
412: }
1.2 nicm 413: }
414:
415: /*
416: * Any windows will have been redrawn as part of clients, so clear
417: * their flags now.
418: */
419: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
420: w = ARRAY_ITEM(&windows, i);
421: if (w == NULL)
422: continue;
423:
424: w->flags &= ~WINDOW_REDRAW;
425: TAILQ_FOREACH(wp, &w->panes, entry)
426: wp->flags &= ~PANE_REDRAW;
427: }
428: }
429:
1.18 nicm 430: /*
431: * Update cursor position and mode settings. The scroll region and attributes
432: * are cleared when idle (waiting for an event) as this is the most likely time
433: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
434: * compromise between excessive resets and likelihood of an interrupt.
435: *
436: * tty_region/tty_reset/tty_update_mode already take care of not resetting
437: * things that are already in their default state.
438: */
1.1 nicm 439: void
1.18 nicm 440: server_client_reset_state(struct client *c)
1.1 nicm 441: {
1.18 nicm 442: struct window *w = c->session->curw->window;
443: struct window_pane *wp = w->active;
444: struct screen *s = wp->screen;
445: struct options *oo = &c->session->options;
446: int status, mode;
1.1 nicm 447:
448: tty_region(&c->tty, 0, c->tty.sy - 1);
449:
450: status = options_get_number(oo, "status");
451: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
452: tty_cursor(&c->tty, 0, 0);
453: else
454: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
455:
456: mode = s->mode;
457: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
458: options_get_number(oo, "mouse-select-pane"))
459: mode |= MODE_MOUSE;
460: tty_update_mode(&c->tty, mode);
461: tty_reset(&c->tty);
1.17 nicm 462: }
463:
464: /* Repeat time callback. */
1.24 nicm 465: /* ARGSUSED */
1.17 nicm 466: void
467: server_client_repeat_timer(unused int fd, unused short events, void *data)
468: {
469: struct client *c = data;
470:
471: if (c->flags & CLIENT_REPEAT)
472: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 473: }
474:
1.36 nicm 475: /* Check if client should be exited. */
476: void
477: server_client_check_exit(struct client *c)
478: {
479: struct msg_exit_data exitdata;
480:
481: if (!(c->flags & CLIENT_EXIT))
482: return;
483:
484: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
485: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
486: return;
487: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
488: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
489: return;
490:
491: exitdata.retcode = c->retcode;
492: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
493:
494: c->flags &= ~CLIENT_EXIT;
495: }
496:
1.38 nicm 497: /*
498: * Check if the client should backoff. During backoff, data from external
499: * programs is not written to the terminal. When the existing data drains, the
500: * client is redrawn.
501: *
502: * There are two backoff phases - both the tty and client have backoff flags -
503: * the first to allow existing data to drain and the latter to ensure backoff
504: * is disabled until the redraw has finished and prevent the redraw triggering
505: * another backoff.
506: */
507: void
508: server_client_check_backoff(struct client *c)
509: {
510: struct tty *tty = &c->tty;
511: size_t used;
512:
513: used = EVBUFFER_LENGTH(tty->event->output);
514:
515: /*
516: * If in the second backoff phase (redrawing), don't check backoff
517: * until the redraw has completed (or enough of it to drop below the
518: * backoff threshold).
519: */
520: if (c->flags & CLIENT_BACKOFF) {
521: if (used > BACKOFF_THRESHOLD)
522: return;
523: c->flags &= ~CLIENT_BACKOFF;
524: return;
525: }
526:
527: /* Once drained, allow data through again and schedule redraw. */
528: if (tty->flags & TTY_BACKOFF) {
529: if (used != 0)
530: return;
531: tty->flags &= ~TTY_BACKOFF;
532: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
533: return;
534: }
535:
536: /* If too much data, start backoff. */
537: if (used > BACKOFF_THRESHOLD)
538: tty->flags |= TTY_BACKOFF;
539: }
540:
1.1 nicm 541: /* Check for client redraws. */
542: void
543: server_client_check_redraw(struct client *c)
544: {
545: struct session *s = c->session;
546: struct window_pane *wp;
547: int flags, redraw;
548:
549: flags = c->tty.flags & TTY_FREEZE;
550: c->tty.flags &= ~TTY_FREEZE;
551:
552: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
553: if (options_get_number(&s->options, "set-titles"))
554: server_client_set_title(c);
1.12 nicm 555:
1.1 nicm 556: if (c->message_string != NULL)
557: redraw = status_message_redraw(c);
558: else if (c->prompt_string != NULL)
559: redraw = status_prompt_redraw(c);
560: else
561: redraw = status_redraw(c);
562: if (!redraw)
563: c->flags &= ~CLIENT_STATUS;
564: }
565:
566: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 567: screen_redraw_screen(c, 0, 0);
568: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 569: } else if (c->flags & CLIENT_REDRAWWINDOW) {
570: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
571: screen_redraw_pane(c, wp);
572: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 573: } else {
574: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
575: if (wp->flags & PANE_REDRAW)
576: screen_redraw_pane(c, wp);
577: }
578: }
579:
1.27 nicm 580: if (c->flags & CLIENT_BORDERS)
581: screen_redraw_screen(c, 0, 1);
582:
1.1 nicm 583: if (c->flags & CLIENT_STATUS)
1.27 nicm 584: screen_redraw_screen(c, 1, 0);
1.1 nicm 585:
586: c->tty.flags |= flags;
587:
1.27 nicm 588: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 589: }
590:
591: /* Set client title. */
592: void
593: server_client_set_title(struct client *c)
594: {
595: struct session *s = c->session;
596: const char *template;
597: char *title;
598:
599: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 600:
1.23 nicm 601: title = status_replace(c, NULL, template, time(NULL), 1);
1.1 nicm 602: if (c->title == NULL || strcmp(title, c->title) != 0) {
603: if (c->title != NULL)
604: xfree(c->title);
605: c->title = xstrdup(title);
606: tty_set_title(&c->tty, c->title);
607: }
608: xfree(title);
609: }
610:
1.36 nicm 611: /*
612: * Error callback for client stdin. Caller must increase reference count when
613: * enabling event!
614: */
615: void
616: server_client_in_callback(
617: unused struct bufferevent *bufev, unused short what, void *data)
618: {
619: struct client *c = data;
620:
621: c->references--;
622: if (c->flags & CLIENT_DEAD)
623: return;
624:
625: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
626: close(c->stdin_fd);
627: c->stdin_fd = -1;
628:
629: if (c->stdin_callback != NULL)
630: c->stdin_callback(c, c->stdin_data);
631: }
632:
633: /* Error callback for client stdout. */
634: void
635: server_client_out_callback(
636: unused struct bufferevent *bufev, unused short what, unused void *data)
637: {
638: struct client *c = data;
639:
640: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
641: close(c->stdout_fd);
642: c->stdout_fd = -1;
643: }
644:
645: /* Error callback for client stderr. */
646: void
647: server_client_err_callback(
648: unused struct bufferevent *bufev, unused short what, unused void *data)
649: {
650: struct client *c = data;
651:
652: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
653: close(c->stderr_fd);
654: c->stderr_fd = -1;
655: }
656:
1.1 nicm 657: /* Dispatch message from client. */
658: int
659: server_client_msg_dispatch(struct client *c)
660: {
661: struct imsg imsg;
662: struct msg_command_data commanddata;
663: struct msg_identify_data identifydata;
664: struct msg_environ_data environdata;
665: ssize_t n, datalen;
1.36 nicm 666: int mode;
1.1 nicm 667:
1.8 deraadt 668: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
669: return (-1);
1.1 nicm 670:
671: for (;;) {
672: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
673: return (-1);
674: if (n == 0)
675: return (0);
676: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
677:
678: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
679: server_write_client(c, MSG_VERSION, NULL, 0);
680: c->flags |= CLIENT_BAD;
681: imsg_free(&imsg);
682: continue;
683: }
684:
685: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
686: switch (imsg.hdr.type) {
687: case MSG_COMMAND:
688: if (datalen != sizeof commanddata)
689: fatalx("bad MSG_COMMAND size");
690: memcpy(&commanddata, imsg.data, sizeof commanddata);
691:
692: server_client_msg_command(c, &commanddata);
693: break;
694: case MSG_IDENTIFY:
695: if (datalen != sizeof identifydata)
696: fatalx("bad MSG_IDENTIFY size");
697: if (imsg.fd == -1)
698: fatalx("MSG_IDENTIFY missing fd");
699: memcpy(&identifydata, imsg.data, sizeof identifydata);
700:
1.39 nicm 701: c->stdin_fd = imsg.fd;
1.37 nicm 702: c->stdin_event = bufferevent_new(c->stdin_fd,
703: NULL, NULL, server_client_in_callback, c);
1.36 nicm 704: if (c->stdin_event == NULL)
705: fatalx("failed to create stdin event");
706:
1.39 nicm 707: if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
708: fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
709: if (fcntl(c->stdin_fd, F_SETFD, FD_CLOEXEC) == -1)
1.36 nicm 710: fatal("fcntl failed");
711:
1.1 nicm 712: server_client_msg_identify(c, &identifydata, imsg.fd);
713: break;
1.33 nicm 714: case MSG_STDOUT:
715: if (datalen != 0)
716: fatalx("bad MSG_STDOUT size");
717: if (imsg.fd == -1)
718: fatalx("MSG_STDOUT missing fd");
719:
1.36 nicm 720: c->stdout_fd = imsg.fd;
1.37 nicm 721: c->stdout_event = bufferevent_new(c->stdout_fd,
722: NULL, NULL, server_client_out_callback, c);
1.36 nicm 723: if (c->stdout_event == NULL)
724: fatalx("failed to create stdout event");
725:
1.37 nicm 726: if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
727: fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
728: if (fcntl(c->stdout_fd, F_SETFD, FD_CLOEXEC) == -1)
1.36 nicm 729: fatal("fcntl failed");
1.33 nicm 730: break;
731: case MSG_STDERR:
732: if (datalen != 0)
733: fatalx("bad MSG_STDERR size");
734: if (imsg.fd == -1)
735: fatalx("MSG_STDERR missing fd");
736:
1.36 nicm 737: c->stderr_fd = imsg.fd;
1.37 nicm 738: c->stderr_event = bufferevent_new(c->stderr_fd,
739: NULL, NULL, server_client_err_callback, c);
1.36 nicm 740: if (c->stderr_event == NULL)
741: fatalx("failed to create stderr event");
742:
1.37 nicm 743: if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
744: fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
745: if (fcntl(c->stderr_fd, F_SETFD, FD_CLOEXEC) == -1)
1.36 nicm 746: fatal("fcntl failed");
1.33 nicm 747: break;
1.1 nicm 748: case MSG_RESIZE:
749: if (datalen != 0)
750: fatalx("bad MSG_RESIZE size");
751:
1.32 nicm 752: if (tty_resize(&c->tty)) {
753: recalculate_sizes();
754: server_redraw_client(c);
755: }
1.1 nicm 756: break;
757: case MSG_EXITING:
758: if (datalen != 0)
759: fatalx("bad MSG_EXITING size");
760:
761: c->session = NULL;
762: tty_close(&c->tty);
763: server_write_client(c, MSG_EXITED, NULL, 0);
764: break;
765: case MSG_WAKEUP:
766: case MSG_UNLOCK:
767: if (datalen != 0)
768: fatalx("bad MSG_WAKEUP size");
769:
770: if (!(c->flags & CLIENT_SUSPENDED))
771: break;
772: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 773:
1.11 nicm 774: if (gettimeofday(&c->activity_time, NULL) != 0)
775: fatal("gettimeofday");
776: if (c->session != NULL) {
777: memcpy(&c->session->activity_time,
778: &c->activity_time,
779: sizeof c->session->activity_time);
780: }
1.10 nicm 781:
1.1 nicm 782: tty_start_tty(&c->tty);
783: server_redraw_client(c);
784: recalculate_sizes();
785: break;
786: case MSG_ENVIRON:
787: if (datalen != sizeof environdata)
788: fatalx("bad MSG_ENVIRON size");
789: memcpy(&environdata, imsg.data, sizeof environdata);
790:
791: environdata.var[(sizeof environdata.var) - 1] = '\0';
792: if (strchr(environdata.var, '=') != NULL)
793: environ_put(&c->environ, environdata.var);
794: break;
795: case MSG_SHELL:
796: if (datalen != 0)
797: fatalx("bad MSG_SHELL size");
798:
799: server_client_msg_shell(c);
800: break;
801: default:
802: fatalx("unexpected message");
803: }
804:
805: imsg_free(&imsg);
806: }
807: }
808:
809: /* Callback to send error message to client. */
810: void printflike2
811: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
812: {
1.33 nicm 813: va_list ap;
1.1 nicm 814:
815: va_start(ap, fmt);
1.36 nicm 816: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 817: va_end(ap);
818:
1.36 nicm 819: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 820: ctx->cmdclient->retcode = 1;
1.1 nicm 821: }
822:
823: /* Callback to send print message to client. */
824: void printflike2
825: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
826: {
1.33 nicm 827: va_list ap;
1.1 nicm 828:
829: va_start(ap, fmt);
1.36 nicm 830: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 831: va_end(ap);
832:
1.36 nicm 833: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 834: }
835:
836: /* Callback to send print message to client, if not quiet. */
837: void printflike2
838: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
839: {
1.33 nicm 840: va_list ap;
1.1 nicm 841:
1.26 nicm 842: if (options_get_number(&global_options, "quiet"))
1.1 nicm 843: return;
844:
845: va_start(ap, fmt);
1.36 nicm 846: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 847: va_end(ap);
848:
1.36 nicm 849: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 850: }
851:
852: /* Handle command message. */
853: void
854: server_client_msg_command(struct client *c, struct msg_command_data *data)
855: {
1.36 nicm 856: struct cmd_ctx ctx;
857: struct cmd_list *cmdlist = NULL;
858: int argc;
859: char **argv, *cause;
1.1 nicm 860:
861: ctx.error = server_client_msg_error;
862: ctx.print = server_client_msg_print;
863: ctx.info = server_client_msg_info;
864:
865: ctx.msgdata = data;
866: ctx.curclient = NULL;
867:
868: ctx.cmdclient = c;
869:
870: argc = data->argc;
871: data->argv[(sizeof data->argv) - 1] = '\0';
872: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
873: server_client_msg_error(&ctx, "command too long");
874: goto error;
875: }
876:
877: if (argc == 0) {
878: argc = 1;
879: argv = xcalloc(1, sizeof *argv);
880: *argv = xstrdup("new-session");
881: }
882:
883: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
884: server_client_msg_error(&ctx, "%s", cause);
885: cmd_free_argv(argc, argv);
886: goto error;
887: }
888: cmd_free_argv(argc, argv);
889:
1.36 nicm 890: if (cmd_list_exec(cmdlist, &ctx) != 1)
891: c->flags |= CLIENT_EXIT;
1.1 nicm 892: cmd_list_free(cmdlist);
893: return;
894:
895: error:
896: if (cmdlist != NULL)
897: cmd_list_free(cmdlist);
1.36 nicm 898: c->flags |= CLIENT_EXIT;
1.1 nicm 899: }
900:
901: /* Handle identify message. */
902: void
903: server_client_msg_identify(
904: struct client *c, struct msg_identify_data *data, int fd)
905: {
1.33 nicm 906: int tty_fd;
907:
1.1 nicm 908: c->cwd = NULL;
909: data->cwd[(sizeof data->cwd) - 1] = '\0';
910: if (*data->cwd != '\0')
911: c->cwd = xstrdup(data->cwd);
912:
1.33 nicm 913: if (!isatty(fd))
914: return;
915: if ((tty_fd = dup(fd)) == -1)
916: fatal("dup failed");
1.1 nicm 917: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 918: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 919: if (data->flags & IDENTIFY_UTF8)
920: c->tty.flags |= TTY_UTF8;
921: if (data->flags & IDENTIFY_256COLOURS)
922: c->tty.term_flags |= TERM_256COLOURS;
923: else if (data->flags & IDENTIFY_88COLOURS)
924: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 925: c->tty.key_callback = server_client_handle_key;
926: c->tty.key_data = c;
1.1 nicm 927:
928: tty_resize(&c->tty);
929:
930: c->flags |= CLIENT_TERMINAL;
931: }
932:
933: /* Handle shell message. */
934: void
935: server_client_msg_shell(struct client *c)
936: {
937: struct msg_shell_data data;
938: const char *shell;
1.25 nicm 939:
1.1 nicm 940: shell = options_get_string(&global_s_options, "default-shell");
941:
942: if (*shell == '\0' || areshell(shell))
943: shell = _PATH_BSHELL;
944: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
945: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 946:
1.1 nicm 947: server_write_client(c, MSG_SHELL, &data, sizeof data);
948: c->flags |= CLIENT_BAD; /* it will die after exec */
949: }
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