Annotation of src/usr.bin/tmux/server-client.c, Revision 1.42
1.42 ! nicm 1: /* $OpenBSD: server-client.c,v 1.41 2010/09/26 20:43:30 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:
73: ARRAY_INIT(&c->prompt_hdata);
74:
1.36 nicm 75: c->stdin_event = NULL;
76: c->stdout_event = NULL;
77: c->stderr_event = NULL;
1.33 nicm 78:
1.1 nicm 79: c->tty.fd = -1;
80: c->title = NULL;
81:
82: c->session = NULL;
83: c->tty.sx = 80;
84: c->tty.sy = 24;
85:
86: screen_init(&c->status, c->tty.sx, 1, 0);
87: job_tree_init(&c->status_jobs);
88:
89: c->message_string = NULL;
1.21 nicm 90: ARRAY_INIT(&c->message_log);
1.1 nicm 91:
92: c->prompt_string = NULL;
93: c->prompt_buffer = NULL;
94: c->prompt_index = 0;
95:
1.17 nicm 96: evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
97:
1.1 nicm 98: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
99: if (ARRAY_ITEM(&clients, i) == NULL) {
100: ARRAY_SET(&clients, i, c);
101: return;
102: }
103: }
104: ARRAY_ADD(&clients, c);
105: log_debug("new client %d", fd);
106: }
107:
108: /* Lost a client. */
109: void
110: server_client_lost(struct client *c)
111: {
1.21 nicm 112: struct message_entry *msg;
113: u_int i;
1.1 nicm 114:
115: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
116: if (ARRAY_ITEM(&clients, i) == c)
117: ARRAY_SET(&clients, i, NULL);
118: }
119: log_debug("lost client %d", c->ibuf.fd);
120:
121: /*
122: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
123: * and tty_free might close an unrelated fd.
124: */
125: if (c->flags & CLIENT_TERMINAL)
126: tty_free(&c->tty);
127:
1.36 nicm 128: if (c->stdin_fd != -1)
129: close(c->stdin_fd);
130: if (c->stdin_event != NULL)
131: bufferevent_free(c->stdin_event);
132: if (c->stdout_fd != -1)
133: close(c->stdout_fd);
134: if (c->stdout_event != NULL)
135: bufferevent_free(c->stdout_event);
136: if (c->stderr_fd != -1)
137: close(c->stderr_fd);
138: if (c->stderr_event != NULL)
139: bufferevent_free(c->stderr_event);
1.33 nicm 140:
1.1 nicm 141: screen_free(&c->status);
142: job_tree_free(&c->status_jobs);
143:
144: if (c->title != NULL)
145: xfree(c->title);
146:
1.17 nicm 147: evtimer_del(&c->repeat_timer);
148:
1.15 nicm 149: evtimer_del(&c->identify_timer);
150:
1.1 nicm 151: if (c->message_string != NULL)
152: xfree(c->message_string);
1.15 nicm 153: evtimer_del(&c->message_timer);
1.21 nicm 154: for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
155: msg = &ARRAY_ITEM(&c->message_log, i);
156: xfree(msg->msg);
157: }
158: ARRAY_FREE(&c->message_log);
1.1 nicm 159:
160: if (c->prompt_string != NULL)
161: xfree(c->prompt_string);
162: if (c->prompt_buffer != NULL)
163: xfree(c->prompt_buffer);
164: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
165: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
166: ARRAY_FREE(&c->prompt_hdata);
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 job *job;
227: struct timeval tv;
1.20 nicm 228: u_int i;
229: int interval;
230: time_t difference;
1.16 nicm 231:
232: if (gettimeofday(&tv, NULL) != 0)
233: fatal("gettimeofday failed");
234:
235: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
236: c = ARRAY_ITEM(&clients, i);
237: if (c == NULL || c->session == NULL)
238: continue;
239: if (c->message_string != NULL || c->prompt_string != NULL) {
240: /*
241: * Don't need timed redraw for messages/prompts so bail
242: * now. The status timer isn't reset when they are
243: * redrawn anyway.
244: */
245: continue;
246: }
247: s = c->session;
248:
249: if (!options_get_number(&s->options, "status"))
250: continue;
251: interval = options_get_number(&s->options, "status-interval");
252:
1.20 nicm 253: difference = tv.tv_sec - c->status_timer.tv_sec;
254: if (difference >= interval) {
1.16 nicm 255: RB_FOREACH(job, jobs, &c->status_jobs)
1.20 nicm 256: job_run(job);
1.16 nicm 257: c->flags |= CLIENT_STATUS;
258: }
259: }
260: }
261:
1.18 nicm 262: /* Handle data key input from client. */
263: void
264: server_client_handle_key(int key, struct mouse_event *mouse, void *data)
265: {
266: struct client *c = data;
267: struct session *s;
268: struct window *w;
269: struct window_pane *wp;
270: struct options *oo;
271: struct timeval tv;
272: struct key_binding *bd;
273: struct keylist *keylist;
274: int xtimeout, isprefix;
275: u_int i;
276:
277: /* Check the client is good to accept input. */
278: if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
279: return;
280: if (c->session == NULL)
281: return;
282: s = c->session;
283:
284: /* Update the activity timer. */
285: if (gettimeofday(&c->activity_time, NULL) != 0)
286: fatal("gettimeofday failed");
287: memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
288:
289: w = c->session->curw->window;
290: wp = w->active;
291: oo = &c->session->options;
292:
293: /* Special case: number keys jump to pane in identify mode. */
1.25 nicm 294: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
1.30 nicm 295: if (c->flags & CLIENT_READONLY)
296: return;
1.18 nicm 297: wp = window_pane_at_index(w, key - '0');
298: if (wp != NULL && window_pane_visible(wp))
299: window_set_active_pane(w, wp);
300: server_clear_identify(c);
301: return;
302: }
303:
304: /* Handle status line. */
1.30 nicm 305: if (!(c->flags & CLIENT_READONLY)) {
306: status_message_clear(c);
307: server_clear_identify(c);
308: }
1.18 nicm 309: if (c->prompt_string != NULL) {
1.30 nicm 310: if (!(c->flags & CLIENT_READONLY))
311: status_prompt_key(c, key);
1.18 nicm 312: return;
313: }
314:
315: /* Check for mouse keys. */
316: if (key == KEYC_MOUSE) {
1.30 nicm 317: if (c->flags & CLIENT_READONLY)
318: return;
1.18 nicm 319: if (options_get_number(oo, "mouse-select-pane")) {
320: window_set_active_at(w, mouse->x, mouse->y);
1.28 nicm 321: server_redraw_window_borders(w);
1.18 nicm 322: wp = w->active;
323: }
1.31 nicm 324: window_pane_mouse(wp, c->session, mouse);
1.18 nicm 325: return;
326: }
327:
328: /* Is this a prefix key? */
329: keylist = options_get_data(&c->session->options, "prefix");
330: isprefix = 0;
331: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
332: if (key == ARRAY_ITEM(keylist, i)) {
333: isprefix = 1;
334: break;
335: }
336: }
337:
338: /* No previous prefix key. */
339: if (!(c->flags & CLIENT_PREFIX)) {
340: if (isprefix)
341: c->flags |= CLIENT_PREFIX;
342: else {
343: /* Try as a non-prefix key binding. */
1.30 nicm 344: if ((bd = key_bindings_lookup(key)) == NULL) {
345: if (!(c->flags & CLIENT_READONLY))
1.31 nicm 346: window_pane_key(wp, c->session, key);
1.30 nicm 347: } else
1.18 nicm 348: key_bindings_dispatch(bd, c);
349: }
350: return;
351: }
352:
353: /* Prefix key already pressed. Reset prefix and lookup key. */
354: c->flags &= ~CLIENT_PREFIX;
355: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
356: /* If repeating, treat this as a key, else ignore. */
357: if (c->flags & CLIENT_REPEAT) {
358: c->flags &= ~CLIENT_REPEAT;
359: if (isprefix)
360: c->flags |= CLIENT_PREFIX;
1.30 nicm 361: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 362: window_pane_key(wp, c->session, key);
1.18 nicm 363: }
364: return;
365: }
366:
367: /* If already repeating, but this key can't repeat, skip it. */
368: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
369: c->flags &= ~CLIENT_REPEAT;
370: if (isprefix)
371: c->flags |= CLIENT_PREFIX;
1.30 nicm 372: else if (!(c->flags & CLIENT_READONLY))
1.31 nicm 373: window_pane_key(wp, c->session, key);
1.18 nicm 374: return;
375: }
376:
377: /* If this key can repeat, reset the repeat flags and timer. */
378: xtimeout = options_get_number(&c->session->options, "repeat-time");
379: if (xtimeout != 0 && bd->can_repeat) {
380: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
1.25 nicm 381:
1.18 nicm 382: tv.tv_sec = xtimeout / 1000;
383: tv.tv_usec = (xtimeout % 1000) * 1000L;
384: evtimer_del(&c->repeat_timer);
385: evtimer_add(&c->repeat_timer, &tv);
386: }
387:
388: /* Dispatch the command. */
389: key_bindings_dispatch(bd, c);
390: }
391:
1.2 nicm 392: /* Client functions that need to happen every loop. */
393: void
394: server_client_loop(void)
395: {
396: struct client *c;
397: struct window *w;
398: struct window_pane *wp;
399: u_int i;
400:
401: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
402: c = ARRAY_ITEM(&clients, i);
1.36 nicm 403: if (c == NULL)
1.2 nicm 404: continue;
405:
1.36 nicm 406: server_client_check_exit(c);
407: if (c->session != NULL) {
408: server_client_check_redraw(c);
409: server_client_reset_state(c);
410: }
1.2 nicm 411: }
412:
413: /*
414: * Any windows will have been redrawn as part of clients, so clear
415: * their flags now.
416: */
417: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
418: w = ARRAY_ITEM(&windows, i);
419: if (w == NULL)
420: continue;
421:
422: w->flags &= ~WINDOW_REDRAW;
423: TAILQ_FOREACH(wp, &w->panes, entry)
424: wp->flags &= ~PANE_REDRAW;
425: }
426: }
427:
1.18 nicm 428: /*
429: * Update cursor position and mode settings. The scroll region and attributes
430: * are cleared when idle (waiting for an event) as this is the most likely time
431: * a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
432: * compromise between excessive resets and likelihood of an interrupt.
433: *
434: * tty_region/tty_reset/tty_update_mode already take care of not resetting
435: * things that are already in their default state.
436: */
1.1 nicm 437: void
1.18 nicm 438: server_client_reset_state(struct client *c)
1.1 nicm 439: {
1.18 nicm 440: struct window *w = c->session->curw->window;
441: struct window_pane *wp = w->active;
442: struct screen *s = wp->screen;
443: struct options *oo = &c->session->options;
444: int status, mode;
1.1 nicm 445:
446: tty_region(&c->tty, 0, c->tty.sy - 1);
447:
448: status = options_get_number(oo, "status");
449: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
450: tty_cursor(&c->tty, 0, 0);
451: else
452: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
453:
454: mode = s->mode;
455: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
456: options_get_number(oo, "mouse-select-pane"))
457: mode |= MODE_MOUSE;
458: tty_update_mode(&c->tty, mode);
459: tty_reset(&c->tty);
1.17 nicm 460: }
461:
462: /* Repeat time callback. */
1.24 nicm 463: /* ARGSUSED */
1.17 nicm 464: void
465: server_client_repeat_timer(unused int fd, unused short events, void *data)
466: {
467: struct client *c = data;
468:
469: if (c->flags & CLIENT_REPEAT)
470: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 471: }
472:
1.36 nicm 473: /* Check if client should be exited. */
474: void
475: server_client_check_exit(struct client *c)
476: {
477: struct msg_exit_data exitdata;
478:
479: if (!(c->flags & CLIENT_EXIT))
480: return;
481:
482: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
483: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
484: return;
485: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
486: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
487: return;
488:
489: exitdata.retcode = c->retcode;
490: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
491:
492: c->flags &= ~CLIENT_EXIT;
493: }
494:
1.38 nicm 495: /*
496: * Check if the client should backoff. During backoff, data from external
497: * programs is not written to the terminal. When the existing data drains, the
498: * client is redrawn.
499: *
500: * There are two backoff phases - both the tty and client have backoff flags -
501: * the first to allow existing data to drain and the latter to ensure backoff
502: * is disabled until the redraw has finished and prevent the redraw triggering
503: * another backoff.
504: */
505: void
506: server_client_check_backoff(struct client *c)
507: {
508: struct tty *tty = &c->tty;
509: size_t used;
510:
511: used = EVBUFFER_LENGTH(tty->event->output);
512:
513: /*
514: * If in the second backoff phase (redrawing), don't check backoff
515: * until the redraw has completed (or enough of it to drop below the
516: * backoff threshold).
517: */
518: if (c->flags & CLIENT_BACKOFF) {
519: if (used > BACKOFF_THRESHOLD)
520: return;
521: c->flags &= ~CLIENT_BACKOFF;
522: return;
523: }
524:
525: /* Once drained, allow data through again and schedule redraw. */
526: if (tty->flags & TTY_BACKOFF) {
527: if (used != 0)
528: return;
529: tty->flags &= ~TTY_BACKOFF;
530: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
531: return;
532: }
533:
534: /* If too much data, start backoff. */
535: if (used > BACKOFF_THRESHOLD)
536: tty->flags |= TTY_BACKOFF;
537: }
538:
1.1 nicm 539: /* Check for client redraws. */
540: void
541: server_client_check_redraw(struct client *c)
542: {
543: struct session *s = c->session;
544: struct window_pane *wp;
545: int flags, redraw;
546:
547: flags = c->tty.flags & TTY_FREEZE;
548: c->tty.flags &= ~TTY_FREEZE;
549:
550: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
551: if (options_get_number(&s->options, "set-titles"))
552: server_client_set_title(c);
1.12 nicm 553:
1.1 nicm 554: if (c->message_string != NULL)
555: redraw = status_message_redraw(c);
556: else if (c->prompt_string != NULL)
557: redraw = status_prompt_redraw(c);
558: else
559: redraw = status_redraw(c);
560: if (!redraw)
561: c->flags &= ~CLIENT_STATUS;
562: }
563:
564: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 565: screen_redraw_screen(c, 0, 0);
566: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 567: } else if (c->flags & CLIENT_REDRAWWINDOW) {
568: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
569: screen_redraw_pane(c, wp);
570: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 571: } else {
572: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
573: if (wp->flags & PANE_REDRAW)
574: screen_redraw_pane(c, wp);
575: }
576: }
577:
1.27 nicm 578: if (c->flags & CLIENT_BORDERS)
579: screen_redraw_screen(c, 0, 1);
580:
1.1 nicm 581: if (c->flags & CLIENT_STATUS)
1.27 nicm 582: screen_redraw_screen(c, 1, 0);
1.1 nicm 583:
584: c->tty.flags |= flags;
585:
1.27 nicm 586: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 587: }
588:
589: /* Set client title. */
590: void
591: server_client_set_title(struct client *c)
592: {
593: struct session *s = c->session;
594: const char *template;
595: char *title;
596:
597: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 598:
1.23 nicm 599: title = status_replace(c, NULL, template, time(NULL), 1);
1.1 nicm 600: if (c->title == NULL || strcmp(title, c->title) != 0) {
601: if (c->title != NULL)
602: xfree(c->title);
603: c->title = xstrdup(title);
604: tty_set_title(&c->tty, c->title);
605: }
606: xfree(title);
607: }
608:
1.36 nicm 609: /*
610: * Error callback for client stdin. Caller must increase reference count when
611: * enabling event!
612: */
613: void
614: server_client_in_callback(
615: unused struct bufferevent *bufev, unused short what, void *data)
616: {
617: struct client *c = data;
618:
619: c->references--;
620: if (c->flags & CLIENT_DEAD)
621: return;
622:
623: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
624: close(c->stdin_fd);
625: c->stdin_fd = -1;
626:
627: if (c->stdin_callback != NULL)
628: c->stdin_callback(c, c->stdin_data);
629: }
630:
631: /* Error callback for client stdout. */
632: void
633: server_client_out_callback(
634: unused struct bufferevent *bufev, unused short what, unused void *data)
635: {
636: struct client *c = data;
637:
638: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
639: close(c->stdout_fd);
640: c->stdout_fd = -1;
641: }
642:
643: /* Error callback for client stderr. */
644: void
645: server_client_err_callback(
646: unused struct bufferevent *bufev, unused short what, unused void *data)
647: {
648: struct client *c = data;
649:
650: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
651: close(c->stderr_fd);
652: c->stderr_fd = -1;
653: }
654:
1.1 nicm 655: /* Dispatch message from client. */
656: int
657: server_client_msg_dispatch(struct client *c)
658: {
659: struct imsg imsg;
660: struct msg_command_data commanddata;
661: struct msg_identify_data identifydata;
662: struct msg_environ_data environdata;
663: ssize_t n, datalen;
1.36 nicm 664: int mode;
1.1 nicm 665:
1.8 deraadt 666: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
667: return (-1);
1.1 nicm 668:
669: for (;;) {
670: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
671: return (-1);
672: if (n == 0)
673: return (0);
674: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
675:
676: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
677: server_write_client(c, MSG_VERSION, NULL, 0);
678: c->flags |= CLIENT_BAD;
679: imsg_free(&imsg);
680: continue;
681: }
682:
683: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
684: switch (imsg.hdr.type) {
685: case MSG_COMMAND:
686: if (datalen != sizeof commanddata)
687: fatalx("bad MSG_COMMAND size");
688: memcpy(&commanddata, imsg.data, sizeof commanddata);
689:
690: server_client_msg_command(c, &commanddata);
691: break;
692: case MSG_IDENTIFY:
693: if (datalen != sizeof identifydata)
694: fatalx("bad MSG_IDENTIFY size");
695: if (imsg.fd == -1)
696: fatalx("MSG_IDENTIFY missing fd");
697: memcpy(&identifydata, imsg.data, sizeof identifydata);
698:
1.39 nicm 699: c->stdin_fd = imsg.fd;
1.37 nicm 700: c->stdin_event = bufferevent_new(c->stdin_fd,
701: NULL, NULL, server_client_in_callback, c);
1.36 nicm 702: if (c->stdin_event == NULL)
703: fatalx("failed to create stdin event");
704:
1.39 nicm 705: if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
706: fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
1.36 nicm 707:
1.1 nicm 708: server_client_msg_identify(c, &identifydata, imsg.fd);
709: break;
1.33 nicm 710: case MSG_STDOUT:
711: if (datalen != 0)
712: fatalx("bad MSG_STDOUT size");
713: if (imsg.fd == -1)
714: fatalx("MSG_STDOUT missing fd");
715:
1.36 nicm 716: c->stdout_fd = imsg.fd;
1.37 nicm 717: c->stdout_event = bufferevent_new(c->stdout_fd,
718: NULL, NULL, server_client_out_callback, c);
1.36 nicm 719: if (c->stdout_event == NULL)
720: fatalx("failed to create stdout event");
721:
1.37 nicm 722: if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
723: fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 724: break;
725: case MSG_STDERR:
726: if (datalen != 0)
727: fatalx("bad MSG_STDERR size");
728: if (imsg.fd == -1)
729: fatalx("MSG_STDERR missing fd");
730:
1.36 nicm 731: c->stderr_fd = imsg.fd;
1.37 nicm 732: c->stderr_event = bufferevent_new(c->stderr_fd,
733: NULL, NULL, server_client_err_callback, c);
1.36 nicm 734: if (c->stderr_event == NULL)
735: fatalx("failed to create stderr event");
736:
1.37 nicm 737: if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
738: fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 739: break;
1.1 nicm 740: case MSG_RESIZE:
741: if (datalen != 0)
742: fatalx("bad MSG_RESIZE size");
743:
1.32 nicm 744: if (tty_resize(&c->tty)) {
745: recalculate_sizes();
746: server_redraw_client(c);
747: }
1.1 nicm 748: break;
749: case MSG_EXITING:
750: if (datalen != 0)
751: fatalx("bad MSG_EXITING size");
752:
753: c->session = NULL;
754: tty_close(&c->tty);
755: server_write_client(c, MSG_EXITED, NULL, 0);
756: break;
757: case MSG_WAKEUP:
758: case MSG_UNLOCK:
759: if (datalen != 0)
760: fatalx("bad MSG_WAKEUP size");
761:
762: if (!(c->flags & CLIENT_SUSPENDED))
763: break;
764: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 765:
1.11 nicm 766: if (gettimeofday(&c->activity_time, NULL) != 0)
767: fatal("gettimeofday");
768: if (c->session != NULL) {
769: memcpy(&c->session->activity_time,
770: &c->activity_time,
771: sizeof c->session->activity_time);
772: }
1.10 nicm 773:
1.1 nicm 774: tty_start_tty(&c->tty);
775: server_redraw_client(c);
776: recalculate_sizes();
777: break;
778: case MSG_ENVIRON:
779: if (datalen != sizeof environdata)
780: fatalx("bad MSG_ENVIRON size");
781: memcpy(&environdata, imsg.data, sizeof environdata);
782:
783: environdata.var[(sizeof environdata.var) - 1] = '\0';
784: if (strchr(environdata.var, '=') != NULL)
785: environ_put(&c->environ, environdata.var);
786: break;
787: case MSG_SHELL:
788: if (datalen != 0)
789: fatalx("bad MSG_SHELL size");
790:
791: server_client_msg_shell(c);
792: break;
793: default:
794: fatalx("unexpected message");
795: }
796:
797: imsg_free(&imsg);
798: }
799: }
800:
801: /* Callback to send error message to client. */
802: void printflike2
803: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
804: {
1.33 nicm 805: va_list ap;
1.1 nicm 806:
807: va_start(ap, fmt);
1.36 nicm 808: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 809: va_end(ap);
810:
1.36 nicm 811: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 812: ctx->cmdclient->retcode = 1;
1.1 nicm 813: }
814:
815: /* Callback to send print message to client. */
816: void printflike2
817: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
818: {
1.33 nicm 819: va_list ap;
1.1 nicm 820:
821: va_start(ap, fmt);
1.36 nicm 822: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 823: va_end(ap);
824:
1.36 nicm 825: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 826: }
827:
828: /* Callback to send print message to client, if not quiet. */
829: void printflike2
830: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
831: {
1.33 nicm 832: va_list ap;
1.1 nicm 833:
1.26 nicm 834: if (options_get_number(&global_options, "quiet"))
1.1 nicm 835: return;
836:
837: va_start(ap, fmt);
1.36 nicm 838: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 839: va_end(ap);
840:
1.36 nicm 841: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 842: }
843:
844: /* Handle command message. */
845: void
846: server_client_msg_command(struct client *c, struct msg_command_data *data)
847: {
1.36 nicm 848: struct cmd_ctx ctx;
849: struct cmd_list *cmdlist = NULL;
850: int argc;
851: char **argv, *cause;
1.1 nicm 852:
853: ctx.error = server_client_msg_error;
854: ctx.print = server_client_msg_print;
855: ctx.info = server_client_msg_info;
856:
857: ctx.msgdata = data;
858: ctx.curclient = NULL;
859:
860: ctx.cmdclient = c;
861:
862: argc = data->argc;
863: data->argv[(sizeof data->argv) - 1] = '\0';
864: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
865: server_client_msg_error(&ctx, "command too long");
866: goto error;
867: }
868:
869: if (argc == 0) {
870: argc = 1;
871: argv = xcalloc(1, sizeof *argv);
872: *argv = xstrdup("new-session");
873: }
874:
875: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
876: server_client_msg_error(&ctx, "%s", cause);
877: cmd_free_argv(argc, argv);
878: goto error;
879: }
880: cmd_free_argv(argc, argv);
881:
1.36 nicm 882: if (cmd_list_exec(cmdlist, &ctx) != 1)
883: c->flags |= CLIENT_EXIT;
1.1 nicm 884: cmd_list_free(cmdlist);
885: return;
886:
887: error:
888: if (cmdlist != NULL)
889: cmd_list_free(cmdlist);
1.36 nicm 890: c->flags |= CLIENT_EXIT;
1.1 nicm 891: }
892:
893: /* Handle identify message. */
894: void
895: server_client_msg_identify(
896: struct client *c, struct msg_identify_data *data, int fd)
897: {
1.33 nicm 898: int tty_fd;
899:
1.1 nicm 900: c->cwd = NULL;
901: data->cwd[(sizeof data->cwd) - 1] = '\0';
902: if (*data->cwd != '\0')
903: c->cwd = xstrdup(data->cwd);
904:
1.33 nicm 905: if (!isatty(fd))
906: return;
907: if ((tty_fd = dup(fd)) == -1)
908: fatal("dup failed");
1.1 nicm 909: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 910: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 911: if (data->flags & IDENTIFY_UTF8)
912: c->tty.flags |= TTY_UTF8;
913: if (data->flags & IDENTIFY_256COLOURS)
914: c->tty.term_flags |= TERM_256COLOURS;
915: else if (data->flags & IDENTIFY_88COLOURS)
916: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 917: c->tty.key_callback = server_client_handle_key;
918: c->tty.key_data = c;
1.1 nicm 919:
920: tty_resize(&c->tty);
921:
922: c->flags |= CLIENT_TERMINAL;
923: }
924:
925: /* Handle shell message. */
926: void
927: server_client_msg_shell(struct client *c)
928: {
929: struct msg_shell_data data;
930: const char *shell;
1.25 nicm 931:
1.1 nicm 932: shell = options_get_string(&global_s_options, "default-shell");
933:
934: if (*shell == '\0' || areshell(shell))
935: shell = _PATH_BSHELL;
936: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
937: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 938:
1.1 nicm 939: server_write_client(c, MSG_SHELL, &data, sizeof data);
940: c->flags |= CLIENT_BAD; /* it will die after exec */
941: }
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