Annotation of src/usr.bin/tmux/server-client.c, Revision 1.45
1.45 ! nicm 1: /* $OpenBSD: server-client.c,v 1.44 2010/12/11 18:39:25 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"))
453: mode |= MODE_MOUSE;
454: tty_update_mode(&c->tty, mode);
455: tty_reset(&c->tty);
1.17 nicm 456: }
457:
458: /* Repeat time callback. */
1.24 nicm 459: /* ARGSUSED */
1.17 nicm 460: void
461: server_client_repeat_timer(unused int fd, unused short events, void *data)
462: {
463: struct client *c = data;
464:
465: if (c->flags & CLIENT_REPEAT)
466: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
1.1 nicm 467: }
468:
1.36 nicm 469: /* Check if client should be exited. */
470: void
471: server_client_check_exit(struct client *c)
472: {
473: struct msg_exit_data exitdata;
474:
475: if (!(c->flags & CLIENT_EXIT))
476: return;
477:
478: if (c->stdout_fd != -1 && c->stdout_event != NULL &&
479: EVBUFFER_LENGTH(c->stdout_event->output) != 0)
480: return;
481: if (c->stderr_fd != -1 && c->stderr_event != NULL &&
482: EVBUFFER_LENGTH(c->stderr_event->output) != 0)
483: return;
484:
485: exitdata.retcode = c->retcode;
486: server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
487:
488: c->flags &= ~CLIENT_EXIT;
489: }
490:
1.38 nicm 491: /*
492: * Check if the client should backoff. During backoff, data from external
493: * programs is not written to the terminal. When the existing data drains, the
494: * client is redrawn.
495: *
496: * There are two backoff phases - both the tty and client have backoff flags -
497: * the first to allow existing data to drain and the latter to ensure backoff
498: * is disabled until the redraw has finished and prevent the redraw triggering
499: * another backoff.
500: */
501: void
502: server_client_check_backoff(struct client *c)
503: {
504: struct tty *tty = &c->tty;
505: size_t used;
506:
507: used = EVBUFFER_LENGTH(tty->event->output);
508:
509: /*
510: * If in the second backoff phase (redrawing), don't check backoff
511: * until the redraw has completed (or enough of it to drop below the
512: * backoff threshold).
513: */
514: if (c->flags & CLIENT_BACKOFF) {
515: if (used > BACKOFF_THRESHOLD)
516: return;
517: c->flags &= ~CLIENT_BACKOFF;
518: return;
519: }
520:
521: /* Once drained, allow data through again and schedule redraw. */
522: if (tty->flags & TTY_BACKOFF) {
523: if (used != 0)
524: return;
525: tty->flags &= ~TTY_BACKOFF;
526: c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
527: return;
528: }
529:
530: /* If too much data, start backoff. */
531: if (used > BACKOFF_THRESHOLD)
532: tty->flags |= TTY_BACKOFF;
533: }
534:
1.1 nicm 535: /* Check for client redraws. */
536: void
537: server_client_check_redraw(struct client *c)
538: {
539: struct session *s = c->session;
540: struct window_pane *wp;
541: int flags, redraw;
542:
543: flags = c->tty.flags & TTY_FREEZE;
544: c->tty.flags &= ~TTY_FREEZE;
545:
546: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
547: if (options_get_number(&s->options, "set-titles"))
548: server_client_set_title(c);
1.12 nicm 549:
1.1 nicm 550: if (c->message_string != NULL)
551: redraw = status_message_redraw(c);
552: else if (c->prompt_string != NULL)
553: redraw = status_prompt_redraw(c);
554: else
555: redraw = status_redraw(c);
556: if (!redraw)
557: c->flags &= ~CLIENT_STATUS;
558: }
559:
560: if (c->flags & CLIENT_REDRAW) {
1.27 nicm 561: screen_redraw_screen(c, 0, 0);
562: c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
1.38 nicm 563: } else if (c->flags & CLIENT_REDRAWWINDOW) {
564: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
565: screen_redraw_pane(c, wp);
566: c->flags &= ~CLIENT_REDRAWWINDOW;
1.1 nicm 567: } else {
568: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
569: if (wp->flags & PANE_REDRAW)
570: screen_redraw_pane(c, wp);
571: }
572: }
573:
1.27 nicm 574: if (c->flags & CLIENT_BORDERS)
575: screen_redraw_screen(c, 0, 1);
576:
1.1 nicm 577: if (c->flags & CLIENT_STATUS)
1.27 nicm 578: screen_redraw_screen(c, 1, 0);
1.1 nicm 579:
580: c->tty.flags |= flags;
581:
1.27 nicm 582: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
1.1 nicm 583: }
584:
585: /* Set client title. */
586: void
587: server_client_set_title(struct client *c)
588: {
589: struct session *s = c->session;
590: const char *template;
591: char *title;
592:
593: template = options_get_string(&s->options, "set-titles-string");
1.25 nicm 594:
1.23 nicm 595: title = status_replace(c, NULL, template, time(NULL), 1);
1.1 nicm 596: if (c->title == NULL || strcmp(title, c->title) != 0) {
597: if (c->title != NULL)
598: xfree(c->title);
599: c->title = xstrdup(title);
600: tty_set_title(&c->tty, c->title);
601: }
602: xfree(title);
603: }
604:
1.36 nicm 605: /*
606: * Error callback for client stdin. Caller must increase reference count when
607: * enabling event!
608: */
609: void
610: server_client_in_callback(
611: unused struct bufferevent *bufev, unused short what, void *data)
612: {
613: struct client *c = data;
614:
615: c->references--;
616: if (c->flags & CLIENT_DEAD)
617: return;
618:
619: bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
620: close(c->stdin_fd);
621: c->stdin_fd = -1;
622:
623: if (c->stdin_callback != NULL)
624: c->stdin_callback(c, c->stdin_data);
625: }
626:
627: /* Error callback for client stdout. */
628: void
629: server_client_out_callback(
630: unused struct bufferevent *bufev, unused short what, unused void *data)
631: {
632: struct client *c = data;
633:
634: bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
635: close(c->stdout_fd);
636: c->stdout_fd = -1;
637: }
638:
639: /* Error callback for client stderr. */
640: void
641: server_client_err_callback(
642: unused struct bufferevent *bufev, unused short what, unused void *data)
643: {
644: struct client *c = data;
645:
646: bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
647: close(c->stderr_fd);
648: c->stderr_fd = -1;
649: }
650:
1.1 nicm 651: /* Dispatch message from client. */
652: int
653: server_client_msg_dispatch(struct client *c)
654: {
655: struct imsg imsg;
656: struct msg_command_data commanddata;
657: struct msg_identify_data identifydata;
658: struct msg_environ_data environdata;
659: ssize_t n, datalen;
1.36 nicm 660: int mode;
1.1 nicm 661:
1.8 deraadt 662: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
663: return (-1);
1.1 nicm 664:
665: for (;;) {
666: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
667: return (-1);
668: if (n == 0)
669: return (0);
670: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
671:
672: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
673: server_write_client(c, MSG_VERSION, NULL, 0);
674: c->flags |= CLIENT_BAD;
675: imsg_free(&imsg);
676: continue;
677: }
678:
679: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
680: switch (imsg.hdr.type) {
681: case MSG_COMMAND:
682: if (datalen != sizeof commanddata)
683: fatalx("bad MSG_COMMAND size");
684: memcpy(&commanddata, imsg.data, sizeof commanddata);
685:
686: server_client_msg_command(c, &commanddata);
687: break;
688: case MSG_IDENTIFY:
689: if (datalen != sizeof identifydata)
690: fatalx("bad MSG_IDENTIFY size");
691: if (imsg.fd == -1)
692: fatalx("MSG_IDENTIFY missing fd");
693: memcpy(&identifydata, imsg.data, sizeof identifydata);
694:
1.39 nicm 695: c->stdin_fd = imsg.fd;
1.37 nicm 696: c->stdin_event = bufferevent_new(c->stdin_fd,
697: NULL, NULL, server_client_in_callback, c);
1.36 nicm 698: if (c->stdin_event == NULL)
699: fatalx("failed to create stdin event");
700:
1.39 nicm 701: if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
702: fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
1.36 nicm 703:
1.1 nicm 704: server_client_msg_identify(c, &identifydata, imsg.fd);
705: break;
1.33 nicm 706: case MSG_STDOUT:
707: if (datalen != 0)
708: fatalx("bad MSG_STDOUT size");
709: if (imsg.fd == -1)
710: fatalx("MSG_STDOUT missing fd");
711:
1.36 nicm 712: c->stdout_fd = imsg.fd;
1.37 nicm 713: c->stdout_event = bufferevent_new(c->stdout_fd,
714: NULL, NULL, server_client_out_callback, c);
1.36 nicm 715: if (c->stdout_event == NULL)
716: fatalx("failed to create stdout event");
717:
1.37 nicm 718: if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
719: fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 720: break;
721: case MSG_STDERR:
722: if (datalen != 0)
723: fatalx("bad MSG_STDERR size");
724: if (imsg.fd == -1)
725: fatalx("MSG_STDERR missing fd");
726:
1.36 nicm 727: c->stderr_fd = imsg.fd;
1.37 nicm 728: c->stderr_event = bufferevent_new(c->stderr_fd,
729: NULL, NULL, server_client_err_callback, c);
1.36 nicm 730: if (c->stderr_event == NULL)
731: fatalx("failed to create stderr event");
732:
1.37 nicm 733: if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
734: fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
1.33 nicm 735: break;
1.1 nicm 736: case MSG_RESIZE:
737: if (datalen != 0)
738: fatalx("bad MSG_RESIZE size");
739:
1.32 nicm 740: if (tty_resize(&c->tty)) {
741: recalculate_sizes();
742: server_redraw_client(c);
743: }
1.1 nicm 744: break;
745: case MSG_EXITING:
746: if (datalen != 0)
747: fatalx("bad MSG_EXITING size");
748:
749: c->session = NULL;
750: tty_close(&c->tty);
751: server_write_client(c, MSG_EXITED, NULL, 0);
752: break;
753: case MSG_WAKEUP:
754: case MSG_UNLOCK:
755: if (datalen != 0)
756: fatalx("bad MSG_WAKEUP size");
757:
758: if (!(c->flags & CLIENT_SUSPENDED))
759: break;
760: c->flags &= ~CLIENT_SUSPENDED;
1.10 nicm 761:
1.11 nicm 762: if (gettimeofday(&c->activity_time, NULL) != 0)
763: fatal("gettimeofday");
764: if (c->session != NULL) {
765: memcpy(&c->session->activity_time,
766: &c->activity_time,
767: sizeof c->session->activity_time);
768: }
1.10 nicm 769:
1.1 nicm 770: tty_start_tty(&c->tty);
771: server_redraw_client(c);
772: recalculate_sizes();
773: break;
774: case MSG_ENVIRON:
775: if (datalen != sizeof environdata)
776: fatalx("bad MSG_ENVIRON size");
777: memcpy(&environdata, imsg.data, sizeof environdata);
778:
779: environdata.var[(sizeof environdata.var) - 1] = '\0';
780: if (strchr(environdata.var, '=') != NULL)
781: environ_put(&c->environ, environdata.var);
782: break;
783: case MSG_SHELL:
784: if (datalen != 0)
785: fatalx("bad MSG_SHELL size");
786:
787: server_client_msg_shell(c);
788: break;
789: default:
790: fatalx("unexpected message");
791: }
792:
793: imsg_free(&imsg);
794: }
795: }
796:
797: /* Callback to send error message to client. */
798: void printflike2
799: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
800: {
1.33 nicm 801: va_list ap;
1.1 nicm 802:
803: va_start(ap, fmt);
1.36 nicm 804: evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
1.1 nicm 805: va_end(ap);
806:
1.36 nicm 807: bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
1.34 nicm 808: ctx->cmdclient->retcode = 1;
1.1 nicm 809: }
810:
811: /* Callback to send print message to client. */
812: void printflike2
813: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
814: {
1.33 nicm 815: va_list ap;
1.1 nicm 816:
817: va_start(ap, fmt);
1.36 nicm 818: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 819: va_end(ap);
820:
1.36 nicm 821: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 822: }
823:
824: /* Callback to send print message to client, if not quiet. */
825: void printflike2
826: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
827: {
1.33 nicm 828: va_list ap;
1.1 nicm 829:
1.26 nicm 830: if (options_get_number(&global_options, "quiet"))
1.1 nicm 831: return;
832:
833: va_start(ap, fmt);
1.36 nicm 834: evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
1.1 nicm 835: va_end(ap);
836:
1.36 nicm 837: bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
1.1 nicm 838: }
839:
840: /* Handle command message. */
841: void
842: server_client_msg_command(struct client *c, struct msg_command_data *data)
843: {
1.36 nicm 844: struct cmd_ctx ctx;
845: struct cmd_list *cmdlist = NULL;
846: int argc;
847: char **argv, *cause;
1.1 nicm 848:
849: ctx.error = server_client_msg_error;
850: ctx.print = server_client_msg_print;
851: ctx.info = server_client_msg_info;
852:
853: ctx.msgdata = data;
854: ctx.curclient = NULL;
855:
856: ctx.cmdclient = c;
857:
858: argc = data->argc;
859: data->argv[(sizeof data->argv) - 1] = '\0';
860: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
861: server_client_msg_error(&ctx, "command too long");
862: goto error;
863: }
864:
865: if (argc == 0) {
866: argc = 1;
867: argv = xcalloc(1, sizeof *argv);
868: *argv = xstrdup("new-session");
869: }
870:
871: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
872: server_client_msg_error(&ctx, "%s", cause);
873: cmd_free_argv(argc, argv);
874: goto error;
875: }
876: cmd_free_argv(argc, argv);
877:
1.36 nicm 878: if (cmd_list_exec(cmdlist, &ctx) != 1)
879: c->flags |= CLIENT_EXIT;
1.1 nicm 880: cmd_list_free(cmdlist);
881: return;
882:
883: error:
884: if (cmdlist != NULL)
885: cmd_list_free(cmdlist);
1.36 nicm 886: c->flags |= CLIENT_EXIT;
1.1 nicm 887: }
888:
889: /* Handle identify message. */
890: void
891: server_client_msg_identify(
892: struct client *c, struct msg_identify_data *data, int fd)
893: {
1.33 nicm 894: int tty_fd;
895:
1.1 nicm 896: c->cwd = NULL;
897: data->cwd[(sizeof data->cwd) - 1] = '\0';
898: if (*data->cwd != '\0')
899: c->cwd = xstrdup(data->cwd);
900:
1.33 nicm 901: if (!isatty(fd))
902: return;
903: if ((tty_fd = dup(fd)) == -1)
904: fatal("dup failed");
1.1 nicm 905: data->term[(sizeof data->term) - 1] = '\0';
1.33 nicm 906: tty_init(&c->tty, tty_fd, data->term);
1.1 nicm 907: if (data->flags & IDENTIFY_UTF8)
908: c->tty.flags |= TTY_UTF8;
909: if (data->flags & IDENTIFY_256COLOURS)
910: c->tty.term_flags |= TERM_256COLOURS;
911: else if (data->flags & IDENTIFY_88COLOURS)
912: c->tty.term_flags |= TERM_88COLOURS;
1.18 nicm 913: c->tty.key_callback = server_client_handle_key;
914: c->tty.key_data = c;
1.1 nicm 915:
916: tty_resize(&c->tty);
917:
918: c->flags |= CLIENT_TERMINAL;
919: }
920:
921: /* Handle shell message. */
922: void
923: server_client_msg_shell(struct client *c)
924: {
925: struct msg_shell_data data;
926: const char *shell;
1.25 nicm 927:
1.1 nicm 928: shell = options_get_string(&global_s_options, "default-shell");
929:
930: if (*shell == '\0' || areshell(shell))
931: shell = _PATH_BSHELL;
932: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
933: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
1.25 nicm 934:
1.1 nicm 935: server_write_client(c, MSG_SHELL, &data, sizeof data);
936: c->flags |= CLIENT_BAD; /* it will die after exec */
937: }
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