[2365b0]: server-client.c Maximize Restore History

Download this file

server-client.c    937 lines (787 with data), 23.7 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
/* $Id: server-client.c,v 1.48 2010-12-22 15:31:00 tcunha Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <event.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
void server_client_handle_key(int, struct mouse_event *, void *);
void server_client_repeat_timer(int, short, void *);
void server_client_check_exit(struct client *);
void server_client_check_backoff(struct client *);
void server_client_check_redraw(struct client *);
void server_client_set_title(struct client *);
void server_client_reset_state(struct client *);
void server_client_in_callback(struct bufferevent *, short, void *);
void server_client_out_callback(struct bufferevent *, short, void *);
void server_client_err_callback(struct bufferevent *, short, void *);
int server_client_msg_dispatch(struct client *);
void server_client_msg_command(struct client *, struct msg_command_data *);
void server_client_msg_identify(
struct client *, struct msg_identify_data *, int);
void server_client_msg_shell(struct client *);
void printflike2 server_client_msg_error(struct cmd_ctx *, const char *, ...);
void printflike2 server_client_msg_print(struct cmd_ctx *, const char *, ...);
void printflike2 server_client_msg_info(struct cmd_ctx *, const char *, ...);
/* Create a new client. */
void
server_client_create(int fd)
{
struct client *c;
int mode;
u_int i;
if ((mode = fcntl(fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
c = xcalloc(1, sizeof *c);
c->references = 0;
imsg_init(&c->ibuf, fd);
server_update_event(c);
if (gettimeofday(&c->creation_time, NULL) != 0)
fatal("gettimeofday failed");
memcpy(&c->activity_time, &c->creation_time, sizeof c->activity_time);
c->stdin_event = NULL;
c->stdout_event = NULL;
c->stderr_event = NULL;
c->tty.fd = -1;
c->title = NULL;
c->session = NULL;
c->last_session = NULL;
c->tty.sx = 80;
c->tty.sy = 24;
screen_init(&c->status, c->tty.sx, 1, 0);
job_tree_init(&c->status_jobs);
c->message_string = NULL;
ARRAY_INIT(&c->message_log);
c->prompt_string = NULL;
c->prompt_buffer = NULL;
c->prompt_index = 0;
evtimer_set(&c->repeat_timer, server_client_repeat_timer, c);
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == NULL) {
ARRAY_SET(&clients, i, c);
return;
}
}
ARRAY_ADD(&clients, c);
log_debug("new client %d", fd);
}
/* Lost a client. */
void
server_client_lost(struct client *c)
{
struct message_entry *msg;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
if (ARRAY_ITEM(&clients, i) == c)
ARRAY_SET(&clients, i, NULL);
}
log_debug("lost client %d", c->ibuf.fd);
/*
* If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
* and tty_free might close an unrelated fd.
*/
if (c->flags & CLIENT_TERMINAL)
tty_free(&c->tty);
if (c->stdin_fd != -1)
close(c->stdin_fd);
if (c->stdin_event != NULL)
bufferevent_free(c->stdin_event);
if (c->stdout_fd != -1)
close(c->stdout_fd);
if (c->stdout_event != NULL)
bufferevent_free(c->stdout_event);
if (c->stderr_fd != -1)
close(c->stderr_fd);
if (c->stderr_event != NULL)
bufferevent_free(c->stderr_event);
screen_free(&c->status);
job_tree_free(&c->status_jobs);
if (c->title != NULL)
xfree(c->title);
evtimer_del(&c->repeat_timer);
evtimer_del(&c->identify_timer);
if (c->message_string != NULL)
xfree(c->message_string);
evtimer_del(&c->message_timer);
for (i = 0; i < ARRAY_LENGTH(&c->message_log); i++) {
msg = &ARRAY_ITEM(&c->message_log, i);
xfree(msg->msg);
}
ARRAY_FREE(&c->message_log);
if (c->prompt_string != NULL)
xfree(c->prompt_string);
if (c->prompt_buffer != NULL)
xfree(c->prompt_buffer);
if (c->cwd != NULL)
xfree(c->cwd);
close(c->ibuf.fd);
imsg_clear(&c->ibuf);
event_del(&c->event);
for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
if (ARRAY_ITEM(&dead_clients, i) == NULL) {
ARRAY_SET(&dead_clients, i, c);
break;
}
}
if (i == ARRAY_LENGTH(&dead_clients))
ARRAY_ADD(&dead_clients, c);
c->flags |= CLIENT_DEAD;
recalculate_sizes();
server_check_unattached();
server_update_socket();
}
/* Process a single client event. */
void
server_client_callback(int fd, short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_DEAD)
return;
if (fd == c->ibuf.fd) {
if (events & EV_WRITE && msgbuf_write(&c->ibuf.w) < 0)
goto client_lost;
if (c->flags & CLIENT_BAD) {
if (c->ibuf.w.queued == 0)
goto client_lost;
return;
}
if (events & EV_READ && server_client_msg_dispatch(c) != 0)
goto client_lost;
}
server_update_event(c);
return;
client_lost:
server_client_lost(c);
}
/* Handle client status timer. */
void
server_client_status_timer(void)
{
struct client *c;
struct session *s;
struct job *job;
struct timeval tv;
u_int i;
int interval;
time_t difference;
if (gettimeofday(&tv, NULL) != 0)
fatal("gettimeofday failed");
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL || c->session == NULL)
continue;
if (c->message_string != NULL || c->prompt_string != NULL) {
/*
* Don't need timed redraw for messages/prompts so bail
* now. The status timer isn't reset when they are
* redrawn anyway.
*/
continue;
}
s = c->session;
if (!options_get_number(&s->options, "status"))
continue;
interval = options_get_number(&s->options, "status-interval");
difference = tv.tv_sec - c->status_timer.tv_sec;
if (difference >= interval) {
RB_FOREACH(job, jobs, &c->status_jobs)
job_run(job);
c->flags |= CLIENT_STATUS;
}
}
}
/* Handle data key input from client. */
void
server_client_handle_key(int key, struct mouse_event *mouse, void *data)
{
struct client *c = data;
struct session *s;
struct window *w;
struct window_pane *wp;
struct options *oo;
struct timeval tv;
struct key_binding *bd;
struct keylist *keylist;
int xtimeout, isprefix;
u_int i;
/* Check the client is good to accept input. */
if ((c->flags & (CLIENT_DEAD|CLIENT_SUSPENDED)) != 0)
return;
if (c->session == NULL)
return;
s = c->session;
/* Update the activity timer. */
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday failed");
memcpy(&s->activity_time, &c->activity_time, sizeof s->activity_time);
w = c->session->curw->window;
wp = w->active;
oo = &c->session->options;
/* Special case: number keys jump to pane in identify mode. */
if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
if (c->flags & CLIENT_READONLY)
return;
wp = window_pane_at_index(w, key - '0');
if (wp != NULL && window_pane_visible(wp))
window_set_active_pane(w, wp);
server_clear_identify(c);
return;
}
/* Handle status line. */
if (!(c->flags & CLIENT_READONLY)) {
status_message_clear(c);
server_clear_identify(c);
}
if (c->prompt_string != NULL) {
if (!(c->flags & CLIENT_READONLY))
status_prompt_key(c, key);
return;
}
/* Check for mouse keys. */
if (key == KEYC_MOUSE) {
if (c->flags & CLIENT_READONLY)
return;
if (options_get_number(oo, "mouse-select-pane")) {
window_set_active_at(w, mouse->x, mouse->y);
server_redraw_window_borders(w);
wp = w->active;
}
window_pane_mouse(wp, c->session, mouse);
return;
}
/* Is this a prefix key? */
keylist = options_get_data(&c->session->options, "prefix");
isprefix = 0;
for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
if (key == ARRAY_ITEM(keylist, i)) {
isprefix = 1;
break;
}
}
/* No previous prefix key. */
if (!(c->flags & CLIENT_PREFIX)) {
if (isprefix)
c->flags |= CLIENT_PREFIX;
else {
/* Try as a non-prefix key binding. */
if ((bd = key_bindings_lookup(key)) == NULL) {
if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, c->session, key);
} else
key_bindings_dispatch(bd, c);
}
return;
}
/* Prefix key already pressed. Reset prefix and lookup key. */
c->flags &= ~CLIENT_PREFIX;
if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
/* If repeating, treat this as a key, else ignore. */
if (c->flags & CLIENT_REPEAT) {
c->flags &= ~CLIENT_REPEAT;
if (isprefix)
c->flags |= CLIENT_PREFIX;
else if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, c->session, key);
}
return;
}
/* If already repeating, but this key can't repeat, skip it. */
if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
c->flags &= ~CLIENT_REPEAT;
if (isprefix)
c->flags |= CLIENT_PREFIX;
else if (!(c->flags & CLIENT_READONLY))
window_pane_key(wp, c->session, key);
return;
}
/* If this key can repeat, reset the repeat flags and timer. */
xtimeout = options_get_number(&c->session->options, "repeat-time");
if (xtimeout != 0 && bd->can_repeat) {
c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
tv.tv_sec = xtimeout / 1000;
tv.tv_usec = (xtimeout % 1000) * 1000L;
evtimer_del(&c->repeat_timer);
evtimer_add(&c->repeat_timer, &tv);
}
/* Dispatch the command. */
key_bindings_dispatch(bd, c);
}
/* Client functions that need to happen every loop. */
void
server_client_loop(void)
{
struct client *c;
struct window *w;
struct window_pane *wp;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
c = ARRAY_ITEM(&clients, i);
if (c == NULL)
continue;
server_client_check_exit(c);
if (c->session != NULL) {
server_client_check_redraw(c);
server_client_reset_state(c);
}
}
/*
* Any windows will have been redrawn as part of clients, so clear
* their flags now.
*/
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
w = ARRAY_ITEM(&windows, i);
if (w == NULL)
continue;
w->flags &= ~WINDOW_REDRAW;
TAILQ_FOREACH(wp, &w->panes, entry)
wp->flags &= ~PANE_REDRAW;
}
}
/*
* Update cursor position and mode settings. The scroll region and attributes
* are cleared when idle (waiting for an event) as this is the most likely time
* a user may interrupt tmux, for example with ~^Z in ssh(1). This is a
* compromise between excessive resets and likelihood of an interrupt.
*
* tty_region/tty_reset/tty_update_mode already take care of not resetting
* things that are already in their default state.
*/
void
server_client_reset_state(struct client *c)
{
struct window *w = c->session->curw->window;
struct window_pane *wp = w->active;
struct screen *s = wp->screen;
struct options *oo = &c->session->options;
int status, mode;
tty_region(&c->tty, 0, c->tty.sy - 1);
status = options_get_number(oo, "status");
if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
tty_cursor(&c->tty, 0, 0);
else
tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
mode = s->mode;
if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
options_get_number(oo, "mouse-select-pane"))
mode |= MODE_MOUSE;
tty_update_mode(&c->tty, mode);
tty_reset(&c->tty);
}
/* Repeat time callback. */
/* ARGSUSED */
void
server_client_repeat_timer(unused int fd, unused short events, void *data)
{
struct client *c = data;
if (c->flags & CLIENT_REPEAT)
c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
}
/* Check if client should be exited. */
void
server_client_check_exit(struct client *c)
{
struct msg_exit_data exitdata;
if (!(c->flags & CLIENT_EXIT))
return;
if (c->stdout_fd != -1 && c->stdout_event != NULL &&
EVBUFFER_LENGTH(c->stdout_event->output) != 0)
return;
if (c->stderr_fd != -1 && c->stderr_event != NULL &&
EVBUFFER_LENGTH(c->stderr_event->output) != 0)
return;
exitdata.retcode = c->retcode;
server_write_client(c, MSG_EXIT, &exitdata, sizeof exitdata);
c->flags &= ~CLIENT_EXIT;
}
/*
* Check if the client should backoff. During backoff, data from external
* programs is not written to the terminal. When the existing data drains, the
* client is redrawn.
*
* There are two backoff phases - both the tty and client have backoff flags -
* the first to allow existing data to drain and the latter to ensure backoff
* is disabled until the redraw has finished and prevent the redraw triggering
* another backoff.
*/
void
server_client_check_backoff(struct client *c)
{
struct tty *tty = &c->tty;
size_t used;
used = EVBUFFER_LENGTH(tty->event->output);
/*
* If in the second backoff phase (redrawing), don't check backoff
* until the redraw has completed (or enough of it to drop below the
* backoff threshold).
*/
if (c->flags & CLIENT_BACKOFF) {
if (used > BACKOFF_THRESHOLD)
return;
c->flags &= ~CLIENT_BACKOFF;
return;
}
/* Once drained, allow data through again and schedule redraw. */
if (tty->flags & TTY_BACKOFF) {
if (used != 0)
return;
tty->flags &= ~TTY_BACKOFF;
c->flags |= (CLIENT_BACKOFF|CLIENT_REDRAWWINDOW|CLIENT_STATUS);
return;
}
/* If too much data, start backoff. */
if (used > BACKOFF_THRESHOLD)
tty->flags |= TTY_BACKOFF;
}
/* Check for client redraws. */
void
server_client_check_redraw(struct client *c)
{
struct session *s = c->session;
struct window_pane *wp;
int flags, redraw;
flags = c->tty.flags & TTY_FREEZE;
c->tty.flags &= ~TTY_FREEZE;
if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
if (options_get_number(&s->options, "set-titles"))
server_client_set_title(c);
if (c->message_string != NULL)
redraw = status_message_redraw(c);
else if (c->prompt_string != NULL)
redraw = status_prompt_redraw(c);
else
redraw = status_redraw(c);
if (!redraw)
c->flags &= ~CLIENT_STATUS;
}
if (c->flags & CLIENT_REDRAW) {
screen_redraw_screen(c, 0, 0);
c->flags &= ~(CLIENT_STATUS|CLIENT_BORDERS);
} else if (c->flags & CLIENT_REDRAWWINDOW) {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry)
screen_redraw_pane(c, wp);
c->flags &= ~CLIENT_REDRAWWINDOW;
} else {
TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
if (wp->flags & PANE_REDRAW)
screen_redraw_pane(c, wp);
}
}
if (c->flags & CLIENT_BORDERS)
screen_redraw_screen(c, 0, 1);
if (c->flags & CLIENT_STATUS)
screen_redraw_screen(c, 1, 0);
c->tty.flags |= flags;
c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS|CLIENT_BORDERS);
}
/* Set client title. */
void
server_client_set_title(struct client *c)
{
struct session *s = c->session;
const char *template;
char *title;
template = options_get_string(&s->options, "set-titles-string");
title = status_replace(c, NULL, template, time(NULL), 1);
if (c->title == NULL || strcmp(title, c->title) != 0) {
if (c->title != NULL)
xfree(c->title);
c->title = xstrdup(title);
tty_set_title(&c->tty, c->title);
}
xfree(title);
}
/*
* Error callback for client stdin. Caller must increase reference count when
* enabling event!
*/
void
server_client_in_callback(
unused struct bufferevent *bufev, unused short what, void *data)
{
struct client *c = data;
c->references--;
if (c->flags & CLIENT_DEAD)
return;
bufferevent_disable(c->stdin_event, EV_READ|EV_WRITE);
close(c->stdin_fd);
c->stdin_fd = -1;
if (c->stdin_callback != NULL)
c->stdin_callback(c, c->stdin_data);
}
/* Error callback for client stdout. */
void
server_client_out_callback(
unused struct bufferevent *bufev, unused short what, unused void *data)
{
struct client *c = data;
bufferevent_disable(c->stdout_event, EV_READ|EV_WRITE);
close(c->stdout_fd);
c->stdout_fd = -1;
}
/* Error callback for client stderr. */
void
server_client_err_callback(
unused struct bufferevent *bufev, unused short what, unused void *data)
{
struct client *c = data;
bufferevent_disable(c->stderr_event, EV_READ|EV_WRITE);
close(c->stderr_fd);
c->stderr_fd = -1;
}
/* Dispatch message from client. */
int
server_client_msg_dispatch(struct client *c)
{
struct imsg imsg;
struct msg_command_data commanddata;
struct msg_identify_data identifydata;
struct msg_environ_data environdata;
ssize_t n, datalen;
int mode;
if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
return (-1);
for (;;) {
if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
return (-1);
if (n == 0)
return (0);
datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
if (imsg.hdr.peerid != PROTOCOL_VERSION) {
server_write_client(c, MSG_VERSION, NULL, 0);
c->flags |= CLIENT_BAD;
imsg_free(&imsg);
continue;
}
log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
switch (imsg.hdr.type) {
case MSG_COMMAND:
if (datalen != sizeof commanddata)
fatalx("bad MSG_COMMAND size");
memcpy(&commanddata, imsg.data, sizeof commanddata);
server_client_msg_command(c, &commanddata);
break;
case MSG_IDENTIFY:
if (datalen != sizeof identifydata)
fatalx("bad MSG_IDENTIFY size");
if (imsg.fd == -1)
fatalx("MSG_IDENTIFY missing fd");
memcpy(&identifydata, imsg.data, sizeof identifydata);
c->stdin_fd = imsg.fd;
c->stdin_event = bufferevent_new(c->stdin_fd,
NULL, NULL, server_client_in_callback, c);
if (c->stdin_event == NULL)
fatalx("failed to create stdin event");
if ((mode = fcntl(c->stdin_fd, F_GETFL)) != -1)
fcntl(c->stdin_fd, F_SETFL, mode|O_NONBLOCK);
server_client_msg_identify(c, &identifydata, imsg.fd);
break;
case MSG_STDOUT:
if (datalen != 0)
fatalx("bad MSG_STDOUT size");
if (imsg.fd == -1)
fatalx("MSG_STDOUT missing fd");
c->stdout_fd = imsg.fd;
c->stdout_event = bufferevent_new(c->stdout_fd,
NULL, NULL, server_client_out_callback, c);
if (c->stdout_event == NULL)
fatalx("failed to create stdout event");
if ((mode = fcntl(c->stdout_fd, F_GETFL)) != -1)
fcntl(c->stdout_fd, F_SETFL, mode|O_NONBLOCK);
break;
case MSG_STDERR:
if (datalen != 0)
fatalx("bad MSG_STDERR size");
if (imsg.fd == -1)
fatalx("MSG_STDERR missing fd");
c->stderr_fd = imsg.fd;
c->stderr_event = bufferevent_new(c->stderr_fd,
NULL, NULL, server_client_err_callback, c);
if (c->stderr_event == NULL)
fatalx("failed to create stderr event");
if ((mode = fcntl(c->stderr_fd, F_GETFL)) != -1)
fcntl(c->stderr_fd, F_SETFL, mode|O_NONBLOCK);
break;
case MSG_RESIZE:
if (datalen != 0)
fatalx("bad MSG_RESIZE size");
if (tty_resize(&c->tty)) {
recalculate_sizes();
server_redraw_client(c);
}
break;
case MSG_EXITING:
if (datalen != 0)
fatalx("bad MSG_EXITING size");
c->session = NULL;
tty_close(&c->tty);
server_write_client(c, MSG_EXITED, NULL, 0);
break;
case MSG_WAKEUP:
case MSG_UNLOCK:
if (datalen != 0)
fatalx("bad MSG_WAKEUP size");
if (!(c->flags & CLIENT_SUSPENDED))
break;
c->flags &= ~CLIENT_SUSPENDED;
if (gettimeofday(&c->activity_time, NULL) != 0)
fatal("gettimeofday");
if (c->session != NULL) {
memcpy(&c->session->activity_time,
&c->activity_time,
sizeof c->session->activity_time);
}
tty_start_tty(&c->tty);
server_redraw_client(c);
recalculate_sizes();
break;
case MSG_ENVIRON:
if (datalen != sizeof environdata)
fatalx("bad MSG_ENVIRON size");
memcpy(&environdata, imsg.data, sizeof environdata);
environdata.var[(sizeof environdata.var) - 1] = '\0';
if (strchr(environdata.var, '=') != NULL)
environ_put(&c->environ, environdata.var);
break;
case MSG_SHELL:
if (datalen != 0)
fatalx("bad MSG_SHELL size");
server_client_msg_shell(c);
break;
default:
fatalx("unexpected message");
}
imsg_free(&imsg);
}
}
/* Callback to send error message to client. */
void printflike2
server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
evbuffer_add_vprintf(ctx->cmdclient->stderr_event->output, fmt, ap);
va_end(ap);
bufferevent_write(ctx->cmdclient->stderr_event, "\n", 1);
ctx->cmdclient->retcode = 1;
}
/* Callback to send print message to client. */
void printflike2
server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
va_end(ap);
bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
}
/* Callback to send print message to client, if not quiet. */
void printflike2
server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
{
va_list ap;
if (options_get_number(&global_options, "quiet"))
return;
va_start(ap, fmt);
evbuffer_add_vprintf(ctx->cmdclient->stdout_event->output, fmt, ap);
va_end(ap);
bufferevent_write(ctx->cmdclient->stdout_event, "\n", 1);
}
/* Handle command message. */
void
server_client_msg_command(struct client *c, struct msg_command_data *data)
{
struct cmd_ctx ctx;
struct cmd_list *cmdlist = NULL;
int argc;
char **argv, *cause;
ctx.error = server_client_msg_error;
ctx.print = server_client_msg_print;
ctx.info = server_client_msg_info;
ctx.msgdata = data;
ctx.curclient = NULL;
ctx.cmdclient = c;
argc = data->argc;
data->argv[(sizeof data->argv) - 1] = '\0';
if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
server_client_msg_error(&ctx, "command too long");
goto error;
}
if (argc == 0) {
argc = 1;
argv = xcalloc(1, sizeof *argv);
*argv = xstrdup("new-session");
}
if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
server_client_msg_error(&ctx, "%s", cause);
cmd_free_argv(argc, argv);
goto error;
}
cmd_free_argv(argc, argv);
if (cmd_list_exec(cmdlist, &ctx) != 1)
c->flags |= CLIENT_EXIT;
cmd_list_free(cmdlist);
return;
error:
if (cmdlist != NULL)
cmd_list_free(cmdlist);
c->flags |= CLIENT_EXIT;
}
/* Handle identify message. */
void
server_client_msg_identify(
struct client *c, struct msg_identify_data *data, int fd)
{
int tty_fd;
c->cwd = NULL;
data->cwd[(sizeof data->cwd) - 1] = '\0';
if (*data->cwd != '\0')
c->cwd = xstrdup(data->cwd);
if (!isatty(fd))
return;
if ((tty_fd = dup(fd)) == -1)
fatal("dup failed");
data->term[(sizeof data->term) - 1] = '\0';
tty_init(&c->tty, tty_fd, data->term);
if (data->flags & IDENTIFY_UTF8)
c->tty.flags |= TTY_UTF8;
if (data->flags & IDENTIFY_256COLOURS)
c->tty.term_flags |= TERM_256COLOURS;
else if (data->flags & IDENTIFY_88COLOURS)
c->tty.term_flags |= TERM_88COLOURS;
c->tty.key_callback = server_client_handle_key;
c->tty.key_data = c;
tty_resize(&c->tty);
c->flags |= CLIENT_TERMINAL;
}
/* Handle shell message. */
void
server_client_msg_shell(struct client *c)
{
struct msg_shell_data data;
const char *shell;
shell = options_get_string(&global_s_options, "default-shell");
if (*shell == '\0' || areshell(shell))
shell = _PATH_BSHELL;
if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
server_write_client(c, MSG_SHELL, &data, sizeof data);
c->flags |= CLIENT_BAD; /* it will die after exec */
}