Annotation of src/usr.bin/tmux/server-client.c, Revision 1.48
1.48 ! nicm 1: /* $OpenBSD: server-client.c,v 1.47 2011/01/01 01:12:09 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;
1.45 nicm 81: c->last_session = NULL;
1.1 nicm 82: c->tty.sx = 80;
83: c->tty.sy = 24;
84:
85: screen_init(&c->status, c->tty.sx, 1, 0);
86: job_tree_init(&c->status_jobs);
87:
88: c->message_string = NULL;
1.21 nicm 89: ARRAY_INIT(&c->message_log);
1.1 nicm 90:
91: c->prompt_string = NULL;
92: c->prompt_buffer = NULL;
93: c->prompt_index = 0;
94:
1.17 nicm 95: evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
96:
1.1 nicm 97: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
98: if (ARRAY_ITEM(&clients, i) == NULL) {
99: ARRAY_SET(&clients, i, c);
100: return;
101: }
102: }
103: ARRAY_ADD(&clients, c);
104: log_debug("new client %d", fd);
105: }
106:
107: /* Lost a client. */
108: void
109: server_client_lost(struct client *c)
110: {
1.21 nicm 111: struct message_entry *msg;
112: u_int i;
1.1 nicm 113:
114: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
115: if (ARRAY_ITEM(&clients, i) == c)
116: ARRAY_SET(&clients, i, NULL);
117: }
118: log_debug("lost client %d", c->ibuf.fd);
119:
120: /*
121: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
122: * and tty_free might close an unrelated fd.
123: */
124: if (c->flags & CLIENT_TERMINAL)
125: tty_free(&c->tty);
126:
1.36 nicm 127: if (c->stdin_fd != -1)
128: close(c->stdin_fd);
129: if (c->stdin_event != NULL)
130: bufferevent_free(c->stdin_event);
131: if (c->stdout_fd != -1)
132: close(c->stdout_fd);
133: if (c->stdout_event != NULL)
134: bufferevent_free(c->stdout_event);
135: if (c->stderr_fd != -1)
136: close(c->stderr_fd);
137: if (c->stderr_event != NULL)
138: bufferevent_free(c->stderr_event);
1.33 nicm 139:
1.1 nicm 140: screen_free(&c->status);
141: job_tree_free(&c->status_jobs);
142:
143: if (c->title != NULL)
144: xfree(c->title);
145:
1.17 nicm 146: evtimer_del(&c->repeat_timer);
147:
1.15 nicm 148: evtimer_del(&c->identify_timer);
149:
1.1 nicm 150: if (c->message_string != NULL)
151: xfree(c->message_string);
1.15 nicm 152: evtimer_del(&c->message_timer);
1.21 nicm 153: for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
154: msg = &ARRAY_ITEM(&c->message_log, i);
155: xfree(msg->msg);
156: }
157: ARRAY_FREE(&c->message_log);
1.1 nicm 158:
159: if (c->prompt_string != NULL)
160: xfree(c->prompt_string);
161: if (c->prompt_buffer != NULL)
162: xfree(c->prompt_buffer);
163:
164: if (c->cwd != NULL)
165: xfree(c->cwd);
166:
167: close(c->ibuf.fd);
168: imsg_clear(&c->ibuf);
1.12 nicm 169: event_del(&c->event);
1.13 nicm 170:
1.1 nicm 171: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
172: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
173: ARRAY_SET(&dead_clients, i, c);
174: break;
175: }
176: }
177: if (i == ARRAY_LENGTH(&dead_clients))
178: ARRAY_ADD(&dead_clients, c);
179: c->flags |= CLIENT_DEAD;
180:
181: recalculate_sizes();
1.41 nicm 182: server_check_unattached();
1.19 nicm 183: server_update_socket();
1.9 nicm 184: }
185:
1.1 nicm 186: /* Process a single client event. */
187: void
1.12 nicm 188: server_client_callback(int fd, short events, void *data)
1.1 nicm 189: {
190: struct client *c = data;
1.7 nicm 191:
192: if (c->flags & CLIENT_DEAD)
193: return;
1.1 nicm 194:
195: if (fd == c->ibuf.fd) {
1.12 nicm 196: if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
1.1 nicm 197: goto client_lost;
198:
199: if (c->flags & CLIENT_BAD) {
200: if (c->ibuf.w.queued == 0)
201: goto client_lost;
202: return;
203: }
204:
1.12 nicm 205: if (events & EV_READ && server_client_msg_dispatch(c) != 0)
1.1 nicm 206: goto client_lost;
207: }
1.14 nicm 208:
1.25 nicm 209: server_update_event(c);
1.1 nicm 210: return;
211:
212: client_lost:
213: server_client_lost(c);
214: }
215:
1.16 nicm 216: /* Handle client status timer. */
217: void
218: server_client_status_timer(void)
219: {
220: struct client *c;
221: struct session *s;
222: struct job *job;
223: struct timeval tv;
1.20 nicm 224: u_int i;
225: int interval;
226: time_t difference;
1.16 nicm 227:
228: if (gettimeofday(&tv, NULL) != 0)
229: fatal("gettimeofday failed");
230:
231: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
232: c = ARRAY_ITEM(&clients, i);
233: if (c == NULL || c->session == NULL)
234: continue;
235: if (c->message_string != NULL || c->prompt_string != NULL) {
236: /*
237: * Don't need timed redraw for messages/prompts so bail
238: * now. The status timer isn't reset when they are
239: * redrawn anyway.
240: */
241: continue;
242: }
243: s = c->session;
244:
245: if (!options_get_number(&s->options, "status"))
246: continue;
247: interval = options_get_number(&s->options, "status-interval");
248:
1.20 nicm 249: difference = tv.tv_sec - c->status_timer.tv_sec;
250: if (difference >= interval) {
1.16 nicm 251: RB_FOREACH(job, jobs, &c->status_jobs)
1.20 nicm 252: job_run(job);
1.16 nicm 253: c->flags |= CLIENT_STATUS;
254: }
255: }
256: }
257:
1.18 nicm 258: /* Handle data key input from client. */
259: void
260: server_client_handle_key(int key, struct mouse_event *mouse, void *data)
261: {
262: struct client *c = data;
263: struct session *s;
264: struct window *w;
265: struct window_pane *wp;
266: struct options *oo;
267: struct timeval tv;
268: struct key_binding *bd;
269: struct keylist *keylist;
270: int xtimeout, isprefix;
271: u_int i;
272:
273: /* Check the client is good to accept input. */
274: if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
275: return;
276: if (c->session == NULL)
277: return;
278: s = c->session;
279:
280: /* Update the activity timer. */
281: if (gettimeofday(&c->activity_time, NULL) != 0)
282: fatal("gettimeofday failed");
283: memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
284:
285: w = c->session->curw->window;
286: wp = w->active;
287: oo = &c->session->options;
288:
289: /* Special case: number keys jump to pane in identify mode. */
1.25 nicm 290: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
1.30 nicm 291: if (c->flags & CLIENT_READONLY)
292: return;
1.18 nicm 293: wp = window_pane_at_index(w, key - '0');
294: if (wp != NULL && window_pane_visible(wp))
295: window_set_active_pane(w, wp);
296: server_clear_identify(c);
297: return;
298: }
299:
300: /* Handle status line. */
1.30 nicm 301: if (!(c->flags & CLIENT_READONLY)) {
302: status_message_clear(c);
303: server_clear_identify(c);
304: }
1.18 nicm 305: if (c->prompt_string != NULL) {
1.30 nicm 306: if (!(c->flags & CLIENT_READONLY))
307: status_prompt_key(c, key);
1.18 nicm 308: return;
309: }
310:
311: /* Check for mouse keys. */
312: if (key == KEYC_MOUSE) {
1.30 nicm 313: if (c->flags & CLIENT_READONLY)
314: return;
1.18 nicm 315: if (options_get_number(oo, "mouse-select-pane")) {
316: window_set_active_at(w, mouse->x, mouse->y);
1.28 nicm 317: server_redraw_window_borders(w);
1.18 nicm 318: wp = w->active;
319: }
1.31 nicm 320: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 321: return;
322: }
323:
324: /* Is this a prefix key? */
325: keylist = options_get_data(&c->session->options, "prefix");
326: isprefix = 0;
327: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
328: if (key == ARRAY_ITEM(keylist, i)) {
329: isprefix = 1;
330: break;
331: }
332: }
333:
334: /* No previous prefix key. */
335: if (!(c->flags & CLIENT_PREFIX)) {
336: if (isprefix)
337: c->flags |= CLIENT_PREFIX;
338: else {
339: /* Try as a non-prefix key binding. */
1.30 nicm 340: if ((bd = key_bindings_lookup(key)) == NULL) {
341: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 342: window_pane_key(wp, c->session, key);
1.30 nicm 343: } else
1.18 nicm 344: key_bindings_dispatch(bd, c);
345: }
346: return;
347: }
348:
349: /* Prefix key already pressed. Reset prefix and lookup key. */
350: c->flags &= ~CLIENT_PREFIX;
351: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
352: /* If repeating, treat this as a key, else ignore. */
353: if (c->flags & CLIENT_REPEAT) {
354: c->flags &= ~CLIENT_REPEAT;
355: if (isprefix)
356: c->flags |= CLIENT_PREFIX;
1.30 nicm 357: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 358: window_pane_key(wp, c->session, key);
1.18 nicm 359: }
360: return;
361: }
362:
363: /* If already repeating, but this key can't repeat, skip it. */
364: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
365: c->flags &= ~CLIENT_REPEAT;
366: if (isprefix)
367: c->flags |= CLIENT_PREFIX;
1.30 nicm 368: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 369: window_pane_key(wp, c->session, key);
1.18 nicm 370: return;
371: }
372:
373: /* If this key can repeat, reset the repeat flags and timer. */
374: xtimeout = options_get_number(&c->session->options, "repeat-time");
375: if (xtimeout != 0 && bd->can_repeat) {
376: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 377:
1.18 nicm 378: tv.tv_sec = xtimeout / 1000;
379: tv.tv_usec = (xtimeout % 1000) * 1000L;
380: evtimer_del(&c->repeat_timer);
381: evtimer_add(&c->repeat_timer, &tv);
382: }
383:
384: /* Dispatch the command. */
385: key_bindings_dispatch(bd, c);
386: }
387:
1.2 nicm 388: /* Client functions that need to happen every loop. */
389: void
390: server_client_loop(void)
391: {
392: struct client *c;
393: struct window *w;
394: struct window_pane *wp;
395: u_int i;
396:
397: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
398: c = ARRAY_ITEM(&clients, i);
1.36 nicm 399: if (c == NULL)
1.2 nicm 400: continue;
401:
1.36 nicm 402: server_client_check_exit(c);
403: if (c->session != NULL) {
404: server_client_check_redraw(c);
405: server_client_reset_state(c);
406: }
1.2 nicm 407: }
408:
409: /*
410: * Any windows will have been redrawn as part of clients, so clear
411: * their flags now.
412: */
413: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
414: w = ARRAY_ITEM(&windows, i);
415: if (w == NULL)
416: continue;
417:
418: w->flags &= ~WINDOW_REDRAW;
419: TAILQ_FOREACH(wp, &w->panes, entry)
420: wp->flags &= ~PANE_REDRAW;
421: }
422: }
423:
1.18 nicm 424: /*
425: * Update cursor position and mode settings. The scroll region and attributes
426: * are cleared when idle (waiting for an event) as this is the most likely time
427: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
428: * compromise between excessive resets and likelihood of an interrupt.
429: *
430: * tty_region/tty_reset/tty_update_mode already take care of not resetting
431: * things that are already in their default state.
432: */
1.1 nicm 433: void
1.18 nicm 434: server_client_reset_state(struct client *c)
1.1 nicm 435: {
1.18 nicm 436: struct window *w = c->session->curw->window;
437: struct window_pane *wp = w->active;
438: struct screen *s = wp->screen;
439: struct options *oo = &c->session->options;
440: int status, mode;
1.1 nicm 441:
442: tty_region(&c->tty, 0, c->tty.sy - 1);
443:
444: status = options_get_number(oo, "status");
445: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
446: tty_cursor(&c->tty, 0, 0);
447: else
448: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
449:
450: mode = s->mode;
451: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
452: options_get_number(oo, "mouse-select-pane"))
1.46 nicm 453: mode |= MODE_MOUSE_STANDARD;
1.48 ! nicm 454:
! 455: /*
! 456: * Set UTF-8 mouse input if required. If the terminal is UTF-8, the
! 457: * user has set mouse-utf8 and any mouse mode is in effect, turn on
! 458: * UTF-8 mouse input. If the receiving terminal hasn't requested it
! 459: * (that is, it isn't in s->mode), then it'll be converted in
! 460: * input_mouse.
! 461: */
! 462: if ((c->tty.flags & TTY_UTF8) &&
! 463: (mode & ALL_MOUSE_MODES) && options_get_number(oo, "mouse-utf8"))
! 464: mode |= MODE_MOUSE_UTF8;
! 465: else
! 466: mode &= ~MODE_MOUSE_UTF8;
! 467:
! 468: /* Set the terminal mode and reset attributes. */
1.1 nicm 469: tty_update_mode(&c->tty, mode);
470: tty_reset(&c->tty);
1.17 nicm 471: }
472:
473: /* Repeat time callback. */
1.24 nicm 474: /* ARGSUSED */
1.17 nicm 475: void
476: server_client_repeat_timer(unused int fd, unused short events, void *data)
477: {
478: struct client *c = data;
479:
480: if (c->flags & CLIENT_REPEAT)
481: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 482: }
483:
1.36 nicm 484: /* Check if client should be exited. */
485: void
486: server_client_check_exit(struct client *c)
487: {
488: struct msg_exit_data exitdata;
489:
490: if (!(c->flags & CLIENT_EXIT))
491: return;
492:
493: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
494: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
495: return;
496: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
497: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
498: return;
499:
500: exitdata.retcode = c->retcode;
501: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
502:
503: c->flags &= ~CLIENT_EXIT;
504: }
505:
1.38 nicm 506: /*
507: * Check if the client should backoff. During backoff, data from external
508: * programs is not written to the terminal. When the existing data drains, the
509: * client is redrawn.
510: *
511: * There are two backoff phases - both the tty and client have backoff flags -
512: * the first to allow existing data to drain and the latter to ensure backoff
513: * is disabled until the redraw has finished and prevent the redraw triggering
514: * another backoff.
515: */
516: void
517: server_client_check_backoff(struct client *c)
518: {
519: struct tty *tty = &c->tty;
520: size_t used;
521:
522: used = EVBUFFER_LENGTH(tty->event->output);
523:
524: /*
525: * If in the second backoff phase (redrawing), don't check backoff
526: * until the redraw has completed (or enough of it to drop below the
527: * backoff threshold).
528: */
529: if (c->flags & CLIENT_BACKOFF) {
530: if (used > BACKOFF_THRESHOLD)
531: return;
532: c->flags &= ~CLIENT_BACKOFF;
533: return;
534: }
535:
536: /* Once drained, allow data through again and schedule redraw. */
537: if (tty->flags & TTY_BACKOFF) {
538: if (used != 0)
539: return;
540: tty->flags &= ~TTY_BACKOFF;
541: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
542: return;
543: }
544:
545: /* If too much data, start backoff. */
546: if (used > BACKOFF_THRESHOLD)
547: tty->flags |= TTY_BACKOFF;
548: }
549:
1.1 nicm 550: /* Check for client redraws. */
551: void
552: server_client_check_redraw(struct client *c)
553: {
554: struct session *s = c->session;
555: struct window_pane *wp;
556: int flags, redraw;
557:
558: flags = c->tty.flags & TTY_FREEZE;
559: c->tty.flags &= ~TTY_FREEZE;
560:
561: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
562: if (options_get_number(&s->options, "set-titles"))
563: server_client_set_title(c);
1.12 nicm 564:
1.1 nicm 565: if (c->message_string != NULL)
566: redraw = status_message_redraw(c);
567: else if (c->prompt_string != NULL)
568: redraw = status_prompt_redraw(c);
569: else
570: redraw = status_redraw(c);
571: if (!redraw)
572: c->flags &= ~CLIENT_STATUS;
573: }
574:
575: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 576: screen_redraw_screen(c, 0, 0);
577: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 578: } else if (c->flags & CLIENT_REDRAWWINDOW) {
579: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
580: screen_redraw_pane(c, wp);
581: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 582: } else {
583: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
584: if (wp->flags & PANE_REDRAW)
585: screen_redraw_pane(c, wp);
586: }
587: }
588:
1.27 nicm 589: if (c->flags & CLIENT_BORDERS)
590: screen_redraw_screen(c, 0, 1);
591:
1.1 nicm 592: if (c->flags & CLIENT_STATUS)
1.27 nicm 593: screen_redraw_screen(c, 1, 0);
1.1 nicm 594:
595: c->tty.flags |= flags;
596:
1.27 nicm 597: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 598: }
599:
600: /* Set client title. */
601: void
602: server_client_set_title(struct client *c)
603: {
604: struct session *s = c->session;
605: const char *template;
606: char *title;
607:
608: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 609:
1.23 nicm 610: title = status_replace(c, NULL, template, time(NULL), 1);
1.1 nicm 611: if (c->title == NULL || strcmp(title, c->title) != 0) {
612: if (c->title != NULL)
613: xfree(c->title);
614: c->title = xstrdup(title);
615: tty_set_title(&c->tty, c->title);
616: }
617: xfree(title);
618: }
619:
1.36 nicm 620: /*
621: * Error callback for client stdin. Caller must increase reference count when
622: * enabling event!
623: */
624: void
625: server_client_in_callback(
626: unused struct bufferevent *bufev, unused short what, void *data)
627: {
628: struct client *c = data;
629:
630: c->references--;
631: if (c->flags & CLIENT_DEAD)
632: return;
633:
634: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
635: close(c->stdin_fd);
636: c->stdin_fd = -1;
637:
638: if (c->stdin_callback != NULL)
639: c->stdin_callback(c, c->stdin_data);
640: }
641:
642: /* Error callback for client stdout. */
643: void
644: server_client_out_callback(
645: unused struct bufferevent *bufev, unused short what, unused void *data)
646: {
647: struct client *c = data;
648:
649: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
650: close(c->stdout_fd);
651: c->stdout_fd = -1;
652: }
653:
654: /* Error callback for client stderr. */
655: void
656: server_client_err_callback(
657: unused struct bufferevent *bufev, unused short what, unused void *data)
658: {
659: struct client *c = data;
660:
661: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
662: close(c->stderr_fd);
663: c->stderr_fd = -1;
664: }
665:
1.1 nicm 666: /* Dispatch message from client. */
667: int
668: server_client_msg_dispatch(struct client *c)
669: {
670: struct imsg imsg;
671: struct msg_command_data commanddata;
672: struct msg_identify_data identifydata;
673: struct msg_environ_data environdata;
674: ssize_t n, datalen;
1.36 nicm 675: int mode;
1.1 nicm 676:
1.8 deraadt 677: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
678: return (-1);
1.1 nicm 679:
680: for (;;) {
681: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
682: return (-1);
683: if (n == 0)
684: return (0);
685: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
686:
687: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
688: server_write_client(c, MSG_VERSION, NULL, 0);
689: c->flags |= CLIENT_BAD;
690: imsg_free(&imsg);
691: continue;
692: }
693:
694: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
695: switch (imsg.hdr.type) {
696: case MSG_COMMAND:
697: if (datalen != sizeof commanddata)
698: fatalx("bad MSG_COMMAND size");
699: memcpy(&commanddata, imsg.data, sizeof commanddata);
700:
701: server_client_msg_command(c, &commanddata);
702: break;
703: case MSG_IDENTIFY:
704: if (datalen != sizeof identifydata)
705: fatalx("bad MSG_IDENTIFY size");
706: if (imsg.fd == -1)
707: fatalx("MSG_IDENTIFY missing fd");
708: memcpy(&identifydata, imsg.data, sizeof identifydata);
709:
1.39 nicm 710: c->stdin_fd = imsg.fd;
1.37 nicm 711: c->stdin_event = bufferevent_new(c->stdin_fd,
712: NULL, NULL, server_client_in_callback, c);
1.36 nicm 713: if (c->stdin_event == NULL)
714: fatalx("failed to create stdin event");
715:
1.39 nicm 716: if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
717: fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
1.36 nicm 718:
1.1 nicm 719: server_client_msg_identify(c, &identifydata, imsg.fd);
720: break;
1.33 nicm 721: case MSG_STDOUT:
722: if (datalen != 0)
723: fatalx("bad MSG_STDOUT size");
724: if (imsg.fd == -1)
725: fatalx("MSG_STDOUT missing fd");
726:
1.36 nicm 727: c->stdout_fd = imsg.fd;
1.37 nicm 728: c->stdout_event = bufferevent_new(c->stdout_fd,
729: NULL, NULL, server_client_out_callback, c);
1.36 nicm 730: if (c->stdout_event == NULL)
731: fatalx("failed to create stdout event");
732:
1.37 nicm 733: if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
734: fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 735: break;
736: case MSG_STDERR:
737: if (datalen != 0)
738: fatalx("bad MSG_STDERR size");
739: if (imsg.fd == -1)
740: fatalx("MSG_STDERR missing fd");
741:
1.36 nicm 742: c->stderr_fd = imsg.fd;
1.37 nicm 743: c->stderr_event = bufferevent_new(c->stderr_fd,
744: NULL, NULL, server_client_err_callback, c);
1.36 nicm 745: if (c->stderr_event == NULL)
746: fatalx("failed to create stderr event");
747:
1.37 nicm 748: if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
749: fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 750: break;
1.1 nicm 751: case MSG_RESIZE:
752: if (datalen != 0)
753: fatalx("bad MSG_RESIZE size");
754:
1.32 nicm 755: if (tty_resize(&c->tty)) {
756: recalculate_sizes();
757: server_redraw_client(c);
758: }
1.1 nicm 759: break;
760: case MSG_EXITING:
761: if (datalen != 0)
762: fatalx("bad MSG_EXITING size");
763:
764: c->session = NULL;
765: tty_close(&c->tty);
766: server_write_client(c, MSG_EXITED, NULL, 0);
767: break;
768: case MSG_WAKEUP:
769: case MSG_UNLOCK:
770: if (datalen != 0)
771: fatalx("bad MSG_WAKEUP size");
772:
773: if (!(c->flags & CLIENT_SUSPENDED))
774: break;
775: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 776:
1.11 nicm 777: if (gettimeofday(&c->activity_time, NULL) != 0)
778: fatal("gettimeofday");
1.47 nicm 779: if (c->session != NULL)
780: session_update_activity(c->session);
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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