Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tmux/server-fn.c	Lines:	0	203	0.0 %
Date:	2016-12-06	Branches:	0	148	0.0 %


/* $OpenBSD: server-fn.c,v 1.99 2016/06/16 10:55:47 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * 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 <sys/queue.h>
#include <sys/uio.h>

#include <imsg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include "tmux.h"

struct session *server_next_session(struct session *);
void		server_callback_identify(int, short, void *);

void
server_fill_environ(struct session *s, struct environ *env)
{
	char	*term;
	u_int	 idx;
	long	 pid;

	if (s != NULL) {
		term = options_get_string(global_options, "default-terminal");
		environ_set(env, "TERM", "%s", term);

		idx = s->id;
	} else
		idx = (u_int)-1;
	pid = getpid();
	environ_set(env, "TMUX", "%s,%ld,%u", socket_path, pid, idx);
}

void
server_redraw_client(struct client *c)
{
	c->flags |= CLIENT_REDRAW;
}

void
server_status_client(struct client *c)
{
	c->flags |= CLIENT_STATUS;
}

void
server_redraw_session(struct session *s)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session == s)
			server_redraw_client(c);
	}
}

void
server_redraw_session_group(struct session *s)
{
	struct session_group	*sg;

	if ((sg = session_group_find(s)) == NULL)
		server_redraw_session(s);
	else {
		TAILQ_FOREACH(s, &sg->sessions, gentry)
			server_redraw_session(s);
	}
}

void
server_status_session(struct session *s)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session == s)
			server_status_client(c);
	}
}

void
server_status_session_group(struct session *s)
{
	struct session_group	*sg;

	if ((sg = session_group_find(s)) == NULL)
		server_status_session(s);
	else {
		TAILQ_FOREACH(s, &sg->sessions, gentry)
			server_status_session(s);
	}
}

void
server_redraw_window(struct window *w)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session != NULL && c->session->curw->window == w)
			server_redraw_client(c);
	}
	w->flags |= WINDOW_REDRAW;
}

void
server_redraw_window_borders(struct window *w)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session != NULL && c->session->curw->window == w)
			c->flags |= CLIENT_BORDERS;
	}
}

void
server_status_window(struct window *w)
{
	struct session	*s;

	/*
	 * This is slightly different. We want to redraw the status line of any
	 * clients containing this window rather than anywhere it is the
	 * current window.
	 */

	RB_FOREACH(s, sessions, &sessions) {
		if (session_has(s, w))
			server_status_session(s);
	}
}

void
server_lock(void)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session != NULL)
			server_lock_client(c);
	}
}

void
server_lock_session(struct session *s)
{
	struct client	*c;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session == s)
			server_lock_client(c);
	}
}

void
server_lock_client(struct client *c)
{
	const char	*cmd;

	if (c->flags & CLIENT_CONTROL)
		return;

	if (c->flags & CLIENT_SUSPENDED)
		return;

	cmd = options_get_string(c->session->options, "lock-command");
	if (strlen(cmd) + 1 > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
		return;

	tty_stop_tty(&c->tty);
	tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
	tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
	tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_E3));

	c->flags |= CLIENT_SUSPENDED;
	proc_send_s(c->peer, MSG_LOCK, cmd);
}

void
server_kill_window(struct window *w)
{
	struct session		*s, *next_s, *target_s;
	struct session_group	*sg;
	struct winlink		*wl;

	next_s = RB_MIN(sessions, &sessions);
	while (next_s != NULL) {
		s = next_s;
		next_s = RB_NEXT(sessions, &sessions, s);

		if (!session_has(s, w))
			continue;
		server_unzoom_window(w);
		while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
			if (session_detach(s, wl)) {
				server_destroy_session_group(s);
				break;
			} else
				server_redraw_session_group(s);
		}

		if (options_get_number(s->options, "renumber-windows")) {
			if ((sg = session_group_find(s)) != NULL) {
				TAILQ_FOREACH(target_s, &sg->sessions, gentry)
					session_renumber_windows(target_s);
			} else
				session_renumber_windows(s);
		}
	}
	recalculate_sizes();
}

int
server_link_window(struct session *src, struct winlink *srcwl,
    struct session *dst, int dstidx, int killflag, int selectflag,
    char **cause)
{
	struct winlink		*dstwl;
	struct session_group	*srcsg, *dstsg;

	srcsg = session_group_find(src);
	dstsg = session_group_find(dst);
	if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
		xasprintf(cause, "sessions are grouped");
		return (-1);
	}

	dstwl = NULL;
	if (dstidx != -1)
		dstwl = winlink_find_by_index(&dst->windows, dstidx);
	if (dstwl != NULL) {
		if (dstwl->window == srcwl->window) {
			xasprintf(cause, "same index: %d", dstidx);
			return (-1);
		}
		if (killflag) {
			/*
			 * Can't use session_detach as it will destroy session
			 * if this makes it empty.
			 */
			notify_window_unlinked(dst, dstwl->window);
			dstwl->flags &= ~WINLINK_ALERTFLAGS;
			winlink_stack_remove(&dst->lastw, dstwl);
			winlink_remove(&dst->windows, dstwl);

			/* Force select/redraw if current. */
			if (dstwl == dst->curw) {
				selectflag = 1;
				dst->curw = NULL;
			}
		}
	}

	if (dstidx == -1)
		dstidx = -1 - options_get_number(dst->options, "base-index");
	dstwl = session_attach(dst, srcwl->window, dstidx, cause);
	if (dstwl == NULL)
		return (-1);

	if (selectflag)
		session_select(dst, dstwl->idx);
	server_redraw_session_group(dst);

	return (0);
}

void
server_unlink_window(struct session *s, struct winlink *wl)
{
	if (session_detach(s, wl))
		server_destroy_session_group(s);
	else
		server_redraw_session_group(s);
}

void
server_destroy_pane(struct window_pane *wp, int hooks)
{
	struct window		*w = wp->window;
	int			 old_fd;
	struct screen_write_ctx	 ctx;
	struct grid_cell	 gc;
	struct cmd_find_state	 fs;

	old_fd = wp->fd;
	if (wp->fd != -1) {
		bufferevent_free(wp->event);
		close(wp->fd);
		wp->fd = -1;
	}

	if (options_get_number(w->options, "remain-on-exit")) {
		if (old_fd == -1)
			return;
		screen_write_start(&ctx, wp, &wp->base);
		screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1);
		screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1);
		screen_write_linefeed(&ctx, 1);
		memcpy(&gc, &grid_default_cell, sizeof gc);
		gc.attr |= GRID_ATTR_BRIGHT;
		screen_write_puts(&ctx, &gc, "Pane is dead");
		screen_write_stop(&ctx);
		wp->flags |= PANE_REDRAW;

		if (hooks && cmd_find_from_pane(&fs, wp) == 0)
			hooks_run(hooks_get(fs.s), NULL, &fs, "pane-died");
		return;
	}

	server_unzoom_window(w);
	layout_close_pane(wp);
	window_remove_pane(w, wp);

	if (hooks && cmd_find_from_window(&fs, w) == 0)
		hooks_run(hooks_get(fs.s), NULL, &fs, "pane-exited");

	if (TAILQ_EMPTY(&w->panes))
		server_kill_window(w);
	else
		server_redraw_window(w);
}

void
server_destroy_session_group(struct session *s)
{
	struct session_group	*sg;
	struct session		*s1;

	if ((sg = session_group_find(s)) == NULL)
		server_destroy_session(s);
	else {
		TAILQ_FOREACH_SAFE(s, &sg->sessions, gentry, s1) {
			server_destroy_session(s);
			session_destroy(s);
		}
	}
}

struct session *
server_next_session(struct session *s)
{
	struct session *s_loop, *s_out;

	s_out = NULL;
	RB_FOREACH(s_loop, sessions, &sessions) {
		if (s_loop == s)
			continue;
		if (s_out == NULL ||
		    timercmp(&s_loop->activity_time, &s_out->activity_time, <))
			s_out = s_loop;
	}
	return (s_out);
}

void
server_destroy_session(struct session *s)
{
	struct client	*c;
	struct session	*s_new;

	if (!options_get_number(s->options, "detach-on-destroy"))
		s_new = server_next_session(s);
	else
		s_new = NULL;

	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session != s)
			continue;
		if (s_new == NULL) {
			c->session = NULL;
			c->flags |= CLIENT_EXIT;
		} else {
			c->last_session = NULL;
			c->session = s_new;
			server_client_set_key_table(c, NULL);
			status_timer_start(c);
			notify_attached_session_changed(c);
			session_update_activity(s_new, NULL);
			gettimeofday(&s_new->last_attached_time, NULL);
			server_redraw_client(c);
			alerts_check_session(s_new);
		}
	}
	recalculate_sizes();
}

void
server_check_unattached(void)
{
	struct session	*s;

	/*
	 * If any sessions are no longer attached and have destroy-unattached
	 * set, collect them.
	 */
	RB_FOREACH(s, sessions, &sessions) {
		if (!(s->flags & SESSION_UNATTACHED))
			continue;
		if (options_get_number (s->options, "destroy-unattached"))
			session_destroy(s);
	}
}

void
server_set_identify(struct client *c)
{
	struct timeval	tv;
	int		delay;

	delay = options_get_number(c->session->options, "display-panes-time");
	tv.tv_sec = delay / 1000;
	tv.tv_usec = (delay % 1000) * 1000L;

	if (event_initialized(&c->identify_timer))
		evtimer_del(&c->identify_timer);
	evtimer_set(&c->identify_timer, server_callback_identify, c);
	evtimer_add(&c->identify_timer, &tv);

	c->flags |= CLIENT_IDENTIFY;
	c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
	server_redraw_client(c);
}

void
server_clear_identify(struct client *c, struct window_pane *wp)
{
	if (~c->flags & CLIENT_IDENTIFY)
		return;
	c->flags &= ~CLIENT_IDENTIFY;

	if (c->identify_callback != NULL)
		c->identify_callback(c, wp);

	c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
	server_redraw_client(c);
}

void
server_callback_identify(__unused int fd, __unused short events, void *data)
{
	server_clear_identify(data, NULL);
}

/* Set stdin callback. */
int
server_set_stdin_callback(struct client *c, void (*cb)(struct client *, int,
    void *), void *cb_data, char **cause)
{
	if (c == NULL || c->session != NULL) {
		*cause = xstrdup("no client with stdin");
		return (-1);
	}
	if (c->flags & CLIENT_TERMINAL) {
		*cause = xstrdup("stdin is a tty");
		return (-1);
	}
	if (c->stdin_callback != NULL) {
		*cause = xstrdup("stdin in use");
		return (-1);
	}

	c->stdin_callback_data = cb_data;
	c->stdin_callback = cb;

	c->references++;

	if (c->stdin_closed)
		c->stdin_callback(c, 1, c->stdin_callback_data);

	proc_send(c->peer, MSG_STDIN, -1, NULL, 0);

	return (0);
}

void
server_unzoom_window(struct window *w)
{
	if (window_unzoom(w) == 0) {
		server_redraw_window(w);
		server_status_window(w);
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: server-fn.c,v 1.99 2016/06/16 10:55:47 nicm Exp $ */
2
3			/*
4			* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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			#include <sys/queue.h>
21			#include <sys/uio.h>
22
23			#include <imsg.h>
24			#include <stdlib.h>
25			#include <string.h>
26			#include <time.h>
27			#include <unistd.h>
28
29			#include "tmux.h"
30
31			struct session server_next_session(struct session );
32			void server_callback_identify(int, short, void *);
33
34			void
35			server_fill_environ(struct session s, struct environ env)
36			{
37			char *term;
38			u_int idx;
39			long pid;
40
41			if (s != NULL) {
42			term = options_get_string(global_options, "default-terminal");
43			environ_set(env, "TERM", "%s", term);
44
45			idx = s->id;
46			} else
47			idx = (u_int)-1;
48			pid = getpid();
49			environ_set(env, "TMUX", "%s,%ld,%u", socket_path, pid, idx);
50			}
51
52			void
53			server_redraw_client(struct client *c)
54			{
55			c->flags \|= CLIENT_REDRAW;
56			}
57
58			void
59			server_status_client(struct client *c)
60			{
61			c->flags \|= CLIENT_STATUS;
62			}
63
64			void
65			server_redraw_session(struct session *s)
66			{
67			struct client *c;
68
69			TAILQ_FOREACH(c, &clients, entry) {
70			if (c->session == s)
71			server_redraw_client(c);
72			}
73			}
74
75			void
76			server_redraw_session_group(struct session *s)
77			{
78			struct session_group *sg;
79
80			if ((sg = session_group_find(s)) == NULL)
81			server_redraw_session(s);
82			else {
83			TAILQ_FOREACH(s, &sg->sessions, gentry)
84			server_redraw_session(s);
85			}
86			}
87
88			void
89			server_status_session(struct session *s)
90			{
91			struct client *c;
92
93			TAILQ_FOREACH(c, &clients, entry) {
94			if (c->session == s)
95			server_status_client(c);
96			}
97			}
98
99			void
100			server_status_session_group(struct session *s)
101			{
102			struct session_group *sg;
103
104			if ((sg = session_group_find(s)) == NULL)
105			server_status_session(s);
106			else {
107			TAILQ_FOREACH(s, &sg->sessions, gentry)
108			server_status_session(s);
109			}
110			}
111
112			void
113			server_redraw_window(struct window *w)
114			{
115			struct client *c;
116
117			TAILQ_FOREACH(c, &clients, entry) {
118			if (c->session != NULL && c->session->curw->window == w)
119			server_redraw_client(c);
120			}
121			w->flags \|= WINDOW_REDRAW;
122			}
123
124			void
125			server_redraw_window_borders(struct window *w)
126			{
127			struct client *c;
128
129			TAILQ_FOREACH(c, &clients, entry) {
130			if (c->session != NULL && c->session->curw->window == w)
131			c->flags \|= CLIENT_BORDERS;
132			}
133			}
134
135			void
136			server_status_window(struct window *w)
137			{
138			struct session *s;
139
140			/*
141			* This is slightly different. We want to redraw the status line of any
142			* clients containing this window rather than anywhere it is the
143			* current window.
144			*/
145
146			RB_FOREACH(s, sessions, &sessions) {
147			if (session_has(s, w))
148			server_status_session(s);
149			}
150			}
151
152			void
153			server_lock(void)
154			{
155			struct client *c;
156
157			TAILQ_FOREACH(c, &clients, entry) {
158			if (c->session != NULL)
159			server_lock_client(c);
160			}
161			}
162
163			void
164			server_lock_session(struct session *s)
165			{
166			struct client *c;
167
168			TAILQ_FOREACH(c, &clients, entry) {
169			if (c->session == s)
170			server_lock_client(c);
171			}
172			}
173
174			void
175			server_lock_client(struct client *c)
176			{
177			const char *cmd;
178
179			if (c->flags & CLIENT_CONTROL)
180			return;
181
182			if (c->flags & CLIENT_SUSPENDED)
183			return;
184
185			cmd = options_get_string(c->session->options, "lock-command");
186			if (strlen(cmd) + 1 > MAX_IMSGSIZE - IMSG_HEADER_SIZE)
187			return;
188
189			tty_stop_tty(&c->tty);
190			tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
191			tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
192			tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_E3));
193
194			c->flags \|= CLIENT_SUSPENDED;
195			proc_send_s(c->peer, MSG_LOCK, cmd);
196			}
197
198			void
199			server_kill_window(struct window *w)
200			{
201			struct session s, next_s, *target_s;
202			struct session_group *sg;
203			struct winlink *wl;
204
205			next_s = RB_MIN(sessions, &sessions);
206			while (next_s != NULL) {
207			s = next_s;
208			next_s = RB_NEXT(sessions, &sessions, s);
209
210			if (!session_has(s, w))
211			continue;
212			server_unzoom_window(w);
213			while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
214			if (session_detach(s, wl)) {
215			server_destroy_session_group(s);
216			break;
217			} else
218			server_redraw_session_group(s);
219			}
220
221			if (options_get_number(s->options, "renumber-windows")) {
222			if ((sg = session_group_find(s)) != NULL) {
223			TAILQ_FOREACH(target_s, &sg->sessions, gentry)
224			session_renumber_windows(target_s);
225			} else
226			session_renumber_windows(s);
227			}
228			}
229			recalculate_sizes();
230			}
231
232			int
233			server_link_window(struct session src, struct winlink srcwl,
234			struct session *dst, int dstidx, int killflag, int selectflag,
235			char **cause)
236			{
237			struct winlink *dstwl;
238			struct session_group srcsg, dstsg;
239
240			srcsg = session_group_find(src);
241			dstsg = session_group_find(dst);
242			if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
243			xasprintf(cause, "sessions are grouped");
244			return (-1);
245			}
246
247			dstwl = NULL;
248			if (dstidx != -1)
249			dstwl = winlink_find_by_index(&dst->windows, dstidx);
250			if (dstwl != NULL) {
251			if (dstwl->window == srcwl->window) {
252			xasprintf(cause, "same index: %d", dstidx);
253			return (-1);
254			}
255			if (killflag) {
256			/*
257			* Can't use session_detach as it will destroy session
258			* if this makes it empty.
259			*/
260			notify_window_unlinked(dst, dstwl->window);
261			dstwl->flags &= ~WINLINK_ALERTFLAGS;
262			winlink_stack_remove(&dst->lastw, dstwl);
263			winlink_remove(&dst->windows, dstwl);
264
265			/* Force select/redraw if current. */
266			if (dstwl == dst->curw) {
267			selectflag = 1;
268			dst->curw = NULL;
269			}
270			}
271			}
272
273			if (dstidx == -1)
274			dstidx = -1 - options_get_number(dst->options, "base-index");
275			dstwl = session_attach(dst, srcwl->window, dstidx, cause);
276			if (dstwl == NULL)
277			return (-1);
278
279			if (selectflag)
280			session_select(dst, dstwl->idx);
281			server_redraw_session_group(dst);
282
283			return (0);
284			}
285
286			void
287			server_unlink_window(struct session s, struct winlink wl)
288			{
289			if (session_detach(s, wl))
290			server_destroy_session_group(s);
291			else
292			server_redraw_session_group(s);
293			}
294
295			void
296			server_destroy_pane(struct window_pane *wp, int hooks)
297			{
298			struct window *w = wp->window;
299			int old_fd;
300			struct screen_write_ctx ctx;
301			struct grid_cell gc;
302			struct cmd_find_state fs;
303
304			old_fd = wp->fd;
305			if (wp->fd != -1) {
306			bufferevent_free(wp->event);
307			close(wp->fd);
308			wp->fd = -1;
309			}
310
311			if (options_get_number(w->options, "remain-on-exit")) {
312			if (old_fd == -1)
313			return;
314			screen_write_start(&ctx, wp, &wp->base);
315			screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1);
316			screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1);
317			screen_write_linefeed(&ctx, 1);
318			memcpy(&gc, &grid_default_cell, sizeof gc);
319			gc.attr \|= GRID_ATTR_BRIGHT;
320			screen_write_puts(&ctx, &gc, "Pane is dead");
321			screen_write_stop(&ctx);
322			wp->flags \|= PANE_REDRAW;
323
324			if (hooks && cmd_find_from_pane(&fs, wp) == 0)
325			hooks_run(hooks_get(fs.s), NULL, &fs, "pane-died");
326			return;
327			}
328
329			server_unzoom_window(w);
330			layout_close_pane(wp);
331			window_remove_pane(w, wp);
332
333			if (hooks && cmd_find_from_window(&fs, w) == 0)
334			hooks_run(hooks_get(fs.s), NULL, &fs, "pane-exited");
335
336			if (TAILQ_EMPTY(&w->panes))
337			server_kill_window(w);
338			else
339			server_redraw_window(w);
340			}
341
342			void
343			server_destroy_session_group(struct session *s)
344			{
345			struct session_group *sg;
346			struct session *s1;
347
348			if ((sg = session_group_find(s)) == NULL)
349			server_destroy_session(s);
350			else {
351			TAILQ_FOREACH_SAFE(s, &sg->sessions, gentry, s1) {
352			server_destroy_session(s);
353			session_destroy(s);
354			}
355			}
356			}
357
358			struct session *
359			server_next_session(struct session *s)
360			{
361			struct session s_loop, s_out;
362
363			s_out = NULL;
364			RB_FOREACH(s_loop, sessions, &sessions) {
365			if (s_loop == s)
366			continue;
367			if (s_out == NULL \|\|
368			timercmp(&s_loop->activity_time, &s_out->activity_time, <))
369			s_out = s_loop;
370			}
371			return (s_out);
372			}
373
374			void
375			server_destroy_session(struct session *s)
376			{
377			struct client *c;
378			struct session *s_new;
379
380			if (!options_get_number(s->options, "detach-on-destroy"))
381			s_new = server_next_session(s);
382			else
383			s_new = NULL;
384
385			TAILQ_FOREACH(c, &clients, entry) {
386			if (c->session != s)
387			continue;
388			if (s_new == NULL) {
389			c->session = NULL;
390			c->flags \|= CLIENT_EXIT;
391			} else {
392			c->last_session = NULL;
393			c->session = s_new;
394			server_client_set_key_table(c, NULL);
395			status_timer_start(c);
396			notify_attached_session_changed(c);
397			session_update_activity(s_new, NULL);
398			gettimeofday(&s_new->last_attached_time, NULL);
399			server_redraw_client(c);
400			alerts_check_session(s_new);
401			}
402			}
403			recalculate_sizes();
404			}
405
406			void
407			server_check_unattached(void)
408			{
409			struct session *s;
410
411			/*
412			* If any sessions are no longer attached and have destroy-unattached
413			* set, collect them.
414			*/
415			RB_FOREACH(s, sessions, &sessions) {
416			if (!(s->flags & SESSION_UNATTACHED))
417			continue;
418			if (options_get_number (s->options, "destroy-unattached"))
419			session_destroy(s);
420			}
421			}
422
423			void
424			server_set_identify(struct client *c)
425			{
426			struct timeval tv;
427			int delay;
428
429			delay = options_get_number(c->session->options, "display-panes-time");
430			tv.tv_sec = delay / 1000;
431			tv.tv_usec = (delay % 1000) * 1000L;
432
433			if (event_initialized(&c->identify_timer))
434			evtimer_del(&c->identify_timer);
435			evtimer_set(&c->identify_timer, server_callback_identify, c);
436			evtimer_add(&c->identify_timer, &tv);
437
438			c->flags \|= CLIENT_IDENTIFY;
439			c->tty.flags \|= (TTY_FREEZE\|TTY_NOCURSOR);
440			server_redraw_client(c);
441			}
442
443			void
444			server_clear_identify(struct client c, struct window_pane wp)
445			{
446			if (~c->flags & CLIENT_IDENTIFY)
447			return;
448			c->flags &= ~CLIENT_IDENTIFY;
449
450			if (c->identify_callback != NULL)
451			c->identify_callback(c, wp);
452
453			c->tty.flags &= ~(TTY_FREEZE\|TTY_NOCURSOR);
454			server_redraw_client(c);
455			}
456
457			void
458			server_callback_identify(__unused int fd, __unused short events, void *data)
459			{
460			server_clear_identify(data, NULL);
461			}
462
463			/* Set stdin callback. */
464			int
465			server_set_stdin_callback(struct client c, void (cb)(struct client *, int,
466			void ), void cb_data, char **cause)
467			{
468			if (c == NULL \|\| c->session != NULL) {
469			*cause = xstrdup("no client with stdin");
470			return (-1);
471			}
472			if (c->flags & CLIENT_TERMINAL) {
473			*cause = xstrdup("stdin is a tty");
474			return (-1);
475			}
476			if (c->stdin_callback != NULL) {
477			*cause = xstrdup("stdin in use");
478			return (-1);
479			}
480
481			c->stdin_callback_data = cb_data;
482			c->stdin_callback = cb;
483
484			c->references++;
485
486			if (c->stdin_closed)
487			c->stdin_callback(c, 1, c->stdin_callback_data);
488
489			proc_send(c->peer, MSG_STDIN, -1, NULL, 0);
490
491			return (0);
492			}
493
494			void
495			server_unzoom_window(struct window *w)
496			{
497			if (window_unzoom(w) == 0) {
498			server_redraw_window(w);
499			server_status_window(w);
500			}
501			}