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1.7 ! nicm 1: /* $OpenBSD: server-client.c,v 1.6 2009/10/25 22:00:15 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:
21: #include <fcntl.h>
22: #include <string.h>
1.4 nicm 23: #include <time.h>
1.1 nicm 24: #include <paths.h>
25: #include <unistd.h>
26:
27: #include "tmux.h"
28:
29: void server_client_handle_data(struct client *);
30: void server_client_check_redraw(struct client *);
31: void server_client_set_title(struct client *);
32: void server_client_check_timers(struct client *);
33:
34: int server_client_msg_dispatch(struct client *);
35: void server_client_msg_command(struct client *, struct msg_command_data *);
36: void server_client_msg_identify(
37: struct client *, struct msg_identify_data *, int);
38: void server_client_msg_shell(struct client *);
39:
40: void printflike2 server_client_msg_error(struct cmd_ctx *, const char *, ...);
41: void printflike2 server_client_msg_print(struct cmd_ctx *, const char *, ...);
42: void printflike2 server_client_msg_info(struct cmd_ctx *, const char *, ...);
43:
44:
45: /* Create a new client. */
46: void
47: server_client_create(int fd)
48: {
49: struct client *c;
50: int mode;
51: u_int i;
52:
53: if ((mode = fcntl(fd, F_GETFL)) == -1)
54: fatal("fcntl failed");
55: if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
56: fatal("fcntl failed");
57: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
58: fatal("fcntl failed");
59:
60: c = xcalloc(1, sizeof *c);
61: c->references = 0;
62: imsg_init(&c->ibuf, fd);
63:
64: if (gettimeofday(&c->tv, NULL) != 0)
65: fatal("gettimeofday failed");
66:
67: ARRAY_INIT(&c->prompt_hdata);
68:
69: c->tty.fd = -1;
70: c->title = NULL;
71:
72: c->session = NULL;
73: c->tty.sx = 80;
74: c->tty.sy = 24;
75:
76: screen_init(&c->status, c->tty.sx, 1, 0);
77: job_tree_init(&c->status_jobs);
78:
79: c->message_string = NULL;
80:
81: c->prompt_string = NULL;
82: c->prompt_buffer = NULL;
83: c->prompt_index = 0;
84:
85: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
86: if (ARRAY_ITEM(&clients, i) == NULL) {
87: ARRAY_SET(&clients, i, c);
88: return;
89: }
90: }
91: ARRAY_ADD(&clients, c);
92: log_debug("new client %d", fd);
93: }
94:
95: /* Lost a client. */
96: void
97: server_client_lost(struct client *c)
98: {
99: u_int i;
100:
101: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
102: if (ARRAY_ITEM(&clients, i) == c)
103: ARRAY_SET(&clients, i, NULL);
104: }
105: log_debug("lost client %d", c->ibuf.fd);
106:
107: /*
108: * If CLIENT_TERMINAL hasn't been set, then tty_init hasn't been called
109: * and tty_free might close an unrelated fd.
110: */
111: if (c->flags & CLIENT_TERMINAL)
112: tty_free(&c->tty);
113:
114: screen_free(&c->status);
115: job_tree_free(&c->status_jobs);
116:
117: if (c->title != NULL)
118: xfree(c->title);
119:
120: if (c->message_string != NULL)
121: xfree(c->message_string);
122:
123: if (c->prompt_string != NULL)
124: xfree(c->prompt_string);
125: if (c->prompt_buffer != NULL)
126: xfree(c->prompt_buffer);
127: for (i = 0; i < ARRAY_LENGTH(&c->prompt_hdata); i++)
128: xfree(ARRAY_ITEM(&c->prompt_hdata, i));
129: ARRAY_FREE(&c->prompt_hdata);
130:
131: if (c->cwd != NULL)
132: xfree(c->cwd);
133:
134: close(c->ibuf.fd);
135: imsg_clear(&c->ibuf);
136:
137: for (i = 0; i < ARRAY_LENGTH(&dead_clients); i++) {
138: if (ARRAY_ITEM(&dead_clients, i) == NULL) {
139: ARRAY_SET(&dead_clients, i, c);
140: break;
141: }
142: }
143: if (i == ARRAY_LENGTH(&dead_clients))
144: ARRAY_ADD(&dead_clients, c);
145: c->flags |= CLIENT_DEAD;
146:
147: recalculate_sizes();
148: }
149:
150: /* Process a single client event. */
151: void
152: server_client_callback(int fd, int events, void *data)
153: {
154: struct client *c = data;
1.7 ! nicm 155:
! 156: if (c->flags & CLIENT_DEAD)
! 157: return;
1.1 nicm 158:
159: if (fd == c->ibuf.fd) {
160: if (events & (POLLERR|POLLNVAL|POLLHUP))
161: goto client_lost;
162:
163: if (events & POLLOUT && msgbuf_write(&c->ibuf.w) < 0)
164: goto client_lost;
165:
166: if (c->flags & CLIENT_BAD) {
167: if (c->ibuf.w.queued == 0)
168: goto client_lost;
169: return;
170: }
171:
172: if (events & POLLIN && server_client_msg_dispatch(c) != 0)
173: goto client_lost;
174: }
175:
176: if (c->tty.fd != -1 && fd == c->tty.fd) {
177: if (c->flags & CLIENT_SUSPENDED || c->session == NULL)
178: return;
179:
180: if (buffer_poll(fd, events, c->tty.in, c->tty.out) != 0)
181: goto client_lost;
182: }
183:
184: return;
185:
186: client_lost:
187: server_client_lost(c);
188: }
189:
1.2 nicm 190: /* Client functions that need to happen every loop. */
191: void
192: server_client_loop(void)
193: {
194: struct client *c;
195: struct window *w;
196: struct window_pane *wp;
197: u_int i;
198:
199: for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
200: c = ARRAY_ITEM(&clients, i);
201: if (c == NULL || c->session == NULL)
202: continue;
203:
1.3 nicm 204: server_client_handle_data(c);
1.6 nicm 205: if (c->session != NULL) {
206: server_client_check_timers(c);
207: server_client_check_redraw(c);
208: }
1.2 nicm 209: }
210:
211: /*
212: * Any windows will have been redrawn as part of clients, so clear
213: * their flags now.
214: */
215: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
216: w = ARRAY_ITEM(&windows, i);
217: if (w == NULL)
218: continue;
219:
220: w->flags &= ~WINDOW_REDRAW;
221: TAILQ_FOREACH(wp, &w->panes, entry)
222: wp->flags &= ~PANE_REDRAW;
223: }
224: }
225:
226: /* Handle data input or output from client. */
1.1 nicm 227: void
228: server_client_handle_data(struct client *c)
229: {
230: struct window *w;
231: struct window_pane *wp;
232: struct screen *s;
233: struct options *oo;
234: struct timeval tv;
235: struct key_binding *bd;
236: struct keylist *keylist;
237: struct mouse_event mouse;
238: int key, status, xtimeout, mode, isprefix;
239: u_int i;
240:
241: xtimeout = options_get_number(&c->session->options, "repeat-time");
242: if (xtimeout != 0 && c->flags & CLIENT_REPEAT) {
243: if (gettimeofday(&tv, NULL) != 0)
244: fatal("gettimeofday failed");
245: if (timercmp(&tv, &c->repeat_timer, >))
246: c->flags &= ~(CLIENT_PREFIX|CLIENT_REPEAT);
247: }
248:
249: /* Process keys. */
250: keylist = options_get_data(&c->session->options, "prefix");
251: while (tty_keys_next(&c->tty, &key, &mouse) == 0) {
252: if (c->session == NULL)
253: return;
254:
255: c->session->activity = time(NULL);
256: w = c->session->curw->window;
257: wp = w->active; /* could die */
258: oo = &c->session->options;
259:
260: /* Special case: number keys jump to pane in identify mode. */
261: if (c->flags & CLIENT_IDENTIFY && key >= '0' && key <= '9') {
262: wp = window_pane_at_index(w, key - '0');
263: if (wp != NULL && window_pane_visible(wp))
264: window_set_active_pane(w, wp);
265: server_clear_identify(c);
266: continue;
267: }
268:
269: status_message_clear(c);
270: server_clear_identify(c);
271: if (c->prompt_string != NULL) {
272: status_prompt_key(c, key);
273: continue;
274: }
275:
276: /* Check for mouse keys. */
277: if (key == KEYC_MOUSE) {
278: if (options_get_number(oo, "mouse-select-pane")) {
279: window_set_active_at(w, mouse.x, mouse.y);
280: wp = w->active;
281: }
282: window_pane_mouse(wp, c, &mouse);
283: continue;
284: }
285:
286: /* Is this a prefix key? */
287: isprefix = 0;
288: for (i = 0; i < ARRAY_LENGTH(keylist); i++) {
289: if (key == ARRAY_ITEM(keylist, i)) {
290: isprefix = 1;
291: break;
292: }
293: }
294:
295: /* No previous prefix key. */
296: if (!(c->flags & CLIENT_PREFIX)) {
297: if (isprefix)
298: c->flags |= CLIENT_PREFIX;
299: else {
300: /* Try as a non-prefix key binding. */
301: if ((bd = key_bindings_lookup(key)) == NULL)
302: window_pane_key(wp, c, key);
303: else
304: key_bindings_dispatch(bd, c);
305: }
306: continue;
307: }
308:
309: /* Prefix key already pressed. Reset prefix and lookup key. */
310: c->flags &= ~CLIENT_PREFIX;
311: if ((bd = key_bindings_lookup(key | KEYC_PREFIX)) == NULL) {
312: /* If repeating, treat this as a key, else ignore. */
313: if (c->flags & CLIENT_REPEAT) {
314: c->flags &= ~CLIENT_REPEAT;
315: if (isprefix)
316: c->flags |= CLIENT_PREFIX;
317: else
318: window_pane_key(wp, c, key);
319: }
320: continue;
321: }
322:
323: /* If already repeating, but this key can't repeat, skip it. */
324: if (c->flags & CLIENT_REPEAT && !bd->can_repeat) {
325: c->flags &= ~CLIENT_REPEAT;
326: if (isprefix)
327: c->flags |= CLIENT_PREFIX;
328: else
329: window_pane_key(wp, c, key);
330: continue;
331: }
332:
333: /* If this key can repeat, reset the repeat flags and timer. */
334: if (xtimeout != 0 && bd->can_repeat) {
335: c->flags |= CLIENT_PREFIX|CLIENT_REPEAT;
336:
337: tv.tv_sec = xtimeout / 1000;
338: tv.tv_usec = (xtimeout % 1000) * 1000L;
339: if (gettimeofday(&c->repeat_timer, NULL) != 0)
340: fatal("gettimeofday failed");
341: timeradd(&c->repeat_timer, &tv, &c->repeat_timer);
342: }
343:
344: /* Dispatch the command. */
345: key_bindings_dispatch(bd, c);
346: }
347: if (c->session == NULL)
348: return;
349: w = c->session->curw->window;
350: wp = w->active;
351: oo = &c->session->options;
352: s = wp->screen;
353:
354: /*
355: * Update cursor position and mode settings. The scroll region and
356: * attributes are cleared across poll(2) as this is the most likely
357: * time a user may interrupt tmux, for example with ~^Z in ssh(1). This
358: * is a compromise between excessive resets and likelihood of an
359: * interrupt.
360: *
361: * tty_region/tty_reset/tty_update_mode already take care of not
362: * resetting things that are already in their default state.
363: */
364: tty_region(&c->tty, 0, c->tty.sy - 1);
365:
366: status = options_get_number(oo, "status");
367: if (!window_pane_visible(wp) || wp->yoff + s->cy >= c->tty.sy - status)
368: tty_cursor(&c->tty, 0, 0);
369: else
370: tty_cursor(&c->tty, wp->xoff + s->cx, wp->yoff + s->cy);
371:
372: mode = s->mode;
373: if (TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry) != NULL &&
374: options_get_number(oo, "mouse-select-pane"))
375: mode |= MODE_MOUSE;
376: tty_update_mode(&c->tty, mode);
377: tty_reset(&c->tty);
378: }
379:
380: /* Check for client redraws. */
381: void
382: server_client_check_redraw(struct client *c)
383: {
384: struct session *s = c->session;
385: struct window_pane *wp;
386: int flags, redraw;
387:
388: flags = c->tty.flags & TTY_FREEZE;
389: c->tty.flags &= ~TTY_FREEZE;
390:
391: if (c->flags & (CLIENT_REDRAW|CLIENT_STATUS)) {
392: if (options_get_number(&s->options, "set-titles"))
393: server_client_set_title(c);
394:
395: if (c->message_string != NULL)
396: redraw = status_message_redraw(c);
397: else if (c->prompt_string != NULL)
398: redraw = status_prompt_redraw(c);
399: else
400: redraw = status_redraw(c);
401: if (!redraw)
402: c->flags &= ~CLIENT_STATUS;
403: }
404:
405: if (c->flags & CLIENT_REDRAW) {
406: screen_redraw_screen(c, 0);
407: c->flags &= ~CLIENT_STATUS;
408: } else {
409: TAILQ_FOREACH(wp, &c->session->curw->window->panes, entry) {
410: if (wp->flags & PANE_REDRAW)
411: screen_redraw_pane(c, wp);
412: }
413: }
414:
415: if (c->flags & CLIENT_STATUS)
416: screen_redraw_screen(c, 1);
417:
418: c->tty.flags |= flags;
419:
420: c->flags &= ~(CLIENT_REDRAW|CLIENT_STATUS);
421: }
422:
423: /* Set client title. */
424: void
425: server_client_set_title(struct client *c)
426: {
427: struct session *s = c->session;
428: const char *template;
429: char *title;
430:
431: template = options_get_string(&s->options, "set-titles-string");
432:
433: title = status_replace(c, template, time(NULL));
434: if (c->title == NULL || strcmp(title, c->title) != 0) {
435: if (c->title != NULL)
436: xfree(c->title);
437: c->title = xstrdup(title);
438: tty_set_title(&c->tty, c->title);
439: }
440: xfree(title);
441: }
442:
443: /* Check client timers. */
444: void
445: server_client_check_timers(struct client *c)
446: {
447: struct session *s = c->session;
448: struct job *job;
449: struct timeval tv;
450: u_int interval;
451:
452: if (gettimeofday(&tv, NULL) != 0)
453: fatal("gettimeofday failed");
454:
455: if (c->flags & CLIENT_IDENTIFY && timercmp(&tv, &c->identify_timer, >))
456: server_clear_identify(c);
457:
458: if (c->message_string != NULL && timercmp(&tv, &c->message_timer, >))
459: status_message_clear(c);
460:
461: if (c->message_string != NULL || c->prompt_string != NULL) {
462: /*
463: * Don't need timed redraw for messages/prompts so bail now.
464: * The status timer isn't reset when they are redrawn anyway.
465: */
466: return;
467:
468: }
469: if (!options_get_number(&s->options, "status"))
470: return;
471:
472: /* Check timer; resolution is only a second so don't be too clever. */
473: interval = options_get_number(&s->options, "status-interval");
474: if (interval == 0)
475: return;
476: if (tv.tv_sec < c->status_timer.tv_sec ||
477: ((u_int) tv.tv_sec) - c->status_timer.tv_sec >= interval) {
478: /* Run the jobs for this client and schedule for redraw. */
479: RB_FOREACH(job, jobs, &c->status_jobs)
480: job_run(job);
481: c->flags |= CLIENT_STATUS;
482: }
483: }
484:
485: /* Dispatch message from client. */
486: int
487: server_client_msg_dispatch(struct client *c)
488: {
489: struct imsg imsg;
490: struct msg_command_data commanddata;
491: struct msg_identify_data identifydata;
492: struct msg_environ_data environdata;
493: ssize_t n, datalen;
494:
495: if ((n = imsg_read(&c->ibuf)) == -1 || n == 0)
496: return (-1);
497:
498: for (;;) {
499: if ((n = imsg_get(&c->ibuf, &imsg)) == -1)
500: return (-1);
501: if (n == 0)
502: return (0);
503: datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
504:
505: if (imsg.hdr.peerid != PROTOCOL_VERSION) {
506: server_write_client(c, MSG_VERSION, NULL, 0);
507: c->flags |= CLIENT_BAD;
508: imsg_free(&imsg);
509: continue;
510: }
511:
512: log_debug("got %d from client %d", imsg.hdr.type, c->ibuf.fd);
513: switch (imsg.hdr.type) {
514: case MSG_COMMAND:
515: if (datalen != sizeof commanddata)
516: fatalx("bad MSG_COMMAND size");
517: memcpy(&commanddata, imsg.data, sizeof commanddata);
518:
519: server_client_msg_command(c, &commanddata);
520: break;
521: case MSG_IDENTIFY:
522: if (datalen != sizeof identifydata)
523: fatalx("bad MSG_IDENTIFY size");
524: if (imsg.fd == -1)
525: fatalx("MSG_IDENTIFY missing fd");
526: memcpy(&identifydata, imsg.data, sizeof identifydata);
527:
528: server_client_msg_identify(c, &identifydata, imsg.fd);
529: break;
530: case MSG_RESIZE:
531: if (datalen != 0)
532: fatalx("bad MSG_RESIZE size");
533:
534: tty_resize(&c->tty);
535: recalculate_sizes();
536: server_redraw_client(c);
537: break;
538: case MSG_EXITING:
539: if (datalen != 0)
540: fatalx("bad MSG_EXITING size");
541:
542: c->session = NULL;
543: tty_close(&c->tty);
544: server_write_client(c, MSG_EXITED, NULL, 0);
545: break;
546: case MSG_WAKEUP:
547: case MSG_UNLOCK:
548: if (datalen != 0)
549: fatalx("bad MSG_WAKEUP size");
550:
551: if (!(c->flags & CLIENT_SUSPENDED))
552: break;
553: c->flags &= ~CLIENT_SUSPENDED;
554: tty_start_tty(&c->tty);
555: server_redraw_client(c);
556: recalculate_sizes();
557: if (c->session != NULL)
558: c->session->activity = time(NULL);
559: break;
560: case MSG_ENVIRON:
561: if (datalen != sizeof environdata)
562: fatalx("bad MSG_ENVIRON size");
563: memcpy(&environdata, imsg.data, sizeof environdata);
564:
565: environdata.var[(sizeof environdata.var) - 1] = '\0';
566: if (strchr(environdata.var, '=') != NULL)
567: environ_put(&c->environ, environdata.var);
568: break;
569: case MSG_SHELL:
570: if (datalen != 0)
571: fatalx("bad MSG_SHELL size");
572:
573: server_client_msg_shell(c);
574: break;
575: default:
576: fatalx("unexpected message");
577: }
578:
579: imsg_free(&imsg);
580: }
581: }
582:
583: /* Callback to send error message to client. */
584: void printflike2
585: server_client_msg_error(struct cmd_ctx *ctx, const char *fmt, ...)
586: {
587: struct msg_print_data data;
588: va_list ap;
589:
590: va_start(ap, fmt);
591: xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
592: va_end(ap);
593:
594: server_write_client(ctx->cmdclient, MSG_ERROR, &data, sizeof data);
595: }
596:
597: /* Callback to send print message to client. */
598: void printflike2
599: server_client_msg_print(struct cmd_ctx *ctx, const char *fmt, ...)
600: {
601: struct msg_print_data data;
602: va_list ap;
603:
604: va_start(ap, fmt);
605: xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
606: va_end(ap);
607:
608: server_write_client(ctx->cmdclient, MSG_PRINT, &data, sizeof data);
609: }
610:
611: /* Callback to send print message to client, if not quiet. */
612: void printflike2
613: server_client_msg_info(struct cmd_ctx *ctx, const char *fmt, ...)
614: {
615: struct msg_print_data data;
616: va_list ap;
617:
618: if (be_quiet)
619: return;
620:
621: va_start(ap, fmt);
622: xvsnprintf(data.msg, sizeof data.msg, fmt, ap);
623: va_end(ap);
624:
625: server_write_client(ctx->cmdclient, MSG_PRINT, &data, sizeof data);
626: }
627:
628: /* Handle command message. */
629: void
630: server_client_msg_command(struct client *c, struct msg_command_data *data)
631: {
632: struct cmd_ctx ctx;
633: struct cmd_list *cmdlist = NULL;
634: struct cmd *cmd;
635: int argc;
636: char **argv, *cause;
637:
638: if (c->session != NULL)
639: c->session->activity = time(NULL);
640:
641: ctx.error = server_client_msg_error;
642: ctx.print = server_client_msg_print;
643: ctx.info = server_client_msg_info;
644:
645: ctx.msgdata = data;
646: ctx.curclient = NULL;
647:
648: ctx.cmdclient = c;
649:
650: argc = data->argc;
651: data->argv[(sizeof data->argv) - 1] = '\0';
652: if (cmd_unpack_argv(data->argv, sizeof data->argv, argc, &argv) != 0) {
653: server_client_msg_error(&ctx, "command too long");
654: goto error;
655: }
656:
657: if (argc == 0) {
658: argc = 1;
659: argv = xcalloc(1, sizeof *argv);
660: *argv = xstrdup("new-session");
661: }
662:
663: if ((cmdlist = cmd_list_parse(argc, argv, &cause)) == NULL) {
664: server_client_msg_error(&ctx, "%s", cause);
665: cmd_free_argv(argc, argv);
666: goto error;
667: }
668: cmd_free_argv(argc, argv);
669:
670: if (data->pid != -1) {
671: TAILQ_FOREACH(cmd, cmdlist, qentry) {
672: if (cmd->entry->flags & CMD_CANTNEST) {
673: server_client_msg_error(&ctx,
674: "sessions should be nested with care. "
675: "unset $TMUX to force");
676: goto error;
677: }
678: }
679: }
680:
681: if (cmd_list_exec(cmdlist, &ctx) != 1)
682: server_write_client(c, MSG_EXIT, NULL, 0);
683: cmd_list_free(cmdlist);
684: return;
685:
686: error:
687: if (cmdlist != NULL)
688: cmd_list_free(cmdlist);
689: server_write_client(c, MSG_EXIT, NULL, 0);
690: }
691:
692: /* Handle identify message. */
693: void
694: server_client_msg_identify(
695: struct client *c, struct msg_identify_data *data, int fd)
696: {
697: c->cwd = NULL;
698: data->cwd[(sizeof data->cwd) - 1] = '\0';
699: if (*data->cwd != '\0')
700: c->cwd = xstrdup(data->cwd);
701:
702: data->term[(sizeof data->term) - 1] = '\0';
703: tty_init(&c->tty, fd, data->term);
704: if (data->flags & IDENTIFY_UTF8)
705: c->tty.flags |= TTY_UTF8;
706: if (data->flags & IDENTIFY_256COLOURS)
707: c->tty.term_flags |= TERM_256COLOURS;
708: else if (data->flags & IDENTIFY_88COLOURS)
709: c->tty.term_flags |= TERM_88COLOURS;
710:
711: tty_resize(&c->tty);
712:
713: c->flags |= CLIENT_TERMINAL;
714: }
715:
716: /* Handle shell message. */
717: void
718: server_client_msg_shell(struct client *c)
719: {
720: struct msg_shell_data data;
721: const char *shell;
722:
723: shell = options_get_string(&global_s_options, "default-shell");
724:
725: if (*shell == '\0' || areshell(shell))
726: shell = _PATH_BSHELL;
727: if (strlcpy(data.shell, shell, sizeof data.shell) >= sizeof data.shell)
728: strlcpy(data.shell, _PATH_BSHELL, sizeof data.shell);
729:
730: server_write_client(c, MSG_SHELL, &data, sizeof data);
731: c->flags |= CLIENT_BAD; /* it will die after exec */
732: }