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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tmux/cmd-queue.c	Lines:	0	217	0.0 %
Date:	2017-11-13	Branches:	0	107	0.0 %


/* $OpenBSD: cmd-queue.c,v 1.58 2017/08/30 10:33:57 nicm Exp $ */

/*
 * Copyright (c) 2013 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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "tmux.h"

/* Global command queue. */
static struct cmdq_list global_queue = TAILQ_HEAD_INITIALIZER(global_queue);

/* Get command queue name. */
static const char *
cmdq_name(struct client *c)
{
	static char	s[32];

	if (c == NULL)
		return ("<global>");
	xsnprintf(s, sizeof s, "<%p>", c);
	return (s);
}

/* Get command queue from client. */
static struct cmdq_list *
cmdq_get(struct client *c)
{
	if (c == NULL)
		return (&global_queue);
	return (&c->queue);
}

/* Append an item. */
void
cmdq_append(struct client *c, struct cmdq_item *item)
{
	struct cmdq_list	*queue = cmdq_get(c);
	struct cmdq_item	*next;

	do {
		next = item->next;
		item->next = NULL;

		if (c != NULL)
			c->references++;
		item->client = c;

		item->queue = queue;
		TAILQ_INSERT_TAIL(queue, item, entry);

		item = next;
	} while (item != NULL);
}

/* Insert an item. */
void
cmdq_insert_after(struct cmdq_item *after, struct cmdq_item *item)
{
	struct client		*c = after->client;
	struct cmdq_list	*queue = after->queue;
	struct cmdq_item	*next;

	do {
		next = item->next;
		item->next = NULL;

		if (c != NULL)
			c->references++;
		item->client = c;

		item->queue = queue;
		if (after->next != NULL)
			TAILQ_INSERT_AFTER(queue, after->next, item, entry);
		else
			TAILQ_INSERT_AFTER(queue, after, item, entry);
		after->next = item;

		item = next;
	} while (item != NULL);
}

/* Remove an item. */
static void
cmdq_remove(struct cmdq_item *item)
{
	if (item->shared != NULL && --item->shared->references == 0) {
		if (item->shared->formats != NULL)
			format_free(item->shared->formats);
		free(item->shared);
	}

	if (item->client != NULL)
		server_client_unref(item->client);

	if (item->type == CMDQ_COMMAND)
		cmd_list_free(item->cmdlist);

	TAILQ_REMOVE(item->queue, item, entry);

	free((void *)item->name);
	free(item);
}

/* Set command group. */
static u_int
cmdq_next_group(void)
{
	static u_int	group;

	return (++group);
}

/* Remove all subsequent items that match this item's group. */
static void
cmdq_remove_group(struct cmdq_item *item)
{
	struct cmdq_item	*this, *next;

	this = TAILQ_NEXT(item, entry);
	while (this != NULL) {
		next = TAILQ_NEXT(this, entry);
		if (this->group == item->group)
			cmdq_remove(this);
		this = next;
	}
}

/* Get a command for the command queue. */
struct cmdq_item *
cmdq_get_command(struct cmd_list *cmdlist, struct cmd_find_state *current,
    struct mouse_event *m, int flags)
{
	struct cmdq_item	*item, *first = NULL, *last = NULL;
	struct cmd		*cmd;
	u_int			 group = cmdq_next_group();
	char			*tmp;
	struct cmdq_shared	*shared;

	shared = xcalloc(1, sizeof *shared);
	if (current != NULL)
		cmd_find_copy_state(&shared->current, current);
	else
		cmd_find_clear_state(&shared->current, 0);
	if (m != NULL)
		memcpy(&shared->mouse, m, sizeof shared->mouse);

	TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
		xasprintf(&tmp, "command[%s]", cmd->entry->name);

		item = xcalloc(1, sizeof *item);
		item->name = tmp;
		item->type = CMDQ_COMMAND;

		item->group = group;
		item->flags = flags;

		item->shared = shared;
		item->cmdlist = cmdlist;
		item->cmd = cmd;

		shared->references++;
		cmdlist->references++;

		if (first == NULL)
			first = item;
		if (last != NULL)
			last->next = item;
		last = item;
	}
	return (first);
}

/* Fill in flag for a command. */
static enum cmd_retval
cmdq_find_flag(struct cmdq_item *item, struct cmd_find_state *fs,
    const struct cmd_entry_flag *flag)
{
	const char	*value;

	if (flag->flag == 0) {
		cmd_find_clear_state(fs, 0);
		return (CMD_RETURN_NORMAL);
	}

	value = args_get(item->cmd->args, flag->flag);
	if (cmd_find_target(fs, item, value, flag->type, flag->flags) != 0) {
		cmd_find_clear_state(fs, 0);
		return (CMD_RETURN_ERROR);
	}
	return (CMD_RETURN_NORMAL);
}

/* Fire command on command queue. */
static enum cmd_retval
cmdq_fire_command(struct cmdq_item *item)
{
	struct client		*c = item->client;
	struct cmd		*cmd = item->cmd;
	const struct cmd_entry	*entry = cmd->entry;
	enum cmd_retval		 retval;
	struct cmd_find_state	*fsp, fs;
	int			 flags;

	flags = !!(cmd->flags & CMD_CONTROL);
	cmdq_guard(item, "begin", flags);

	if (item->client == NULL)
		item->client = cmd_find_client(item, NULL, 1);
	retval = cmdq_find_flag(item, &item->source, &entry->source);
	if (retval == CMD_RETURN_ERROR)
		goto out;
	retval = cmdq_find_flag(item, &item->target, &entry->target);
	if (retval == CMD_RETURN_ERROR)
		goto out;

	retval = entry->exec(cmd, item);
	if (retval == CMD_RETURN_ERROR)
		goto out;

	if (entry->flags & CMD_AFTERHOOK) {
		if (cmd_find_valid_state(&item->target))
			fsp = &item->target;
		else if (cmd_find_valid_state(&item->shared->current))
			fsp = &item->shared->current;
		else if (cmd_find_from_client(&fs, item->client, 0) == 0)
			fsp = &fs;
		else
			goto out;
		hooks_insert(fsp->s->hooks, item, fsp, "after-%s", entry->name);
	}

out:
	item->client = c;
	if (retval == CMD_RETURN_ERROR)
		cmdq_guard(item, "error", flags);
	else
		cmdq_guard(item, "end", flags);
	return (retval);
}

/* Get a callback for the command queue. */
struct cmdq_item *
cmdq_get_callback1(const char *name, cmdq_cb cb, void *data)
{
	struct cmdq_item	*item;
	char			*tmp;

	xasprintf(&tmp, "callback[%s]", name);

	item = xcalloc(1, sizeof *item);
	item->name = tmp;
	item->type = CMDQ_CALLBACK;

	item->group = 0;
	item->flags = 0;

	item->cb = cb;
	item->data = data;

	return (item);
}

/* Fire callback on callback queue. */
static enum cmd_retval
cmdq_fire_callback(struct cmdq_item *item)
{
	return (item->cb(item, item->data));
}

/* Add a format to command queue. */
void
cmdq_format(struct cmdq_item *item, const char *key, const char *fmt, ...)
{
	struct cmdq_shared	*shared = item->shared;
	va_list			 ap;
	char			*value;

	va_start(ap, fmt);
	xvasprintf(&value, fmt, ap);
	va_end(ap);

	if (shared->formats == NULL)
		shared->formats = format_create(NULL, NULL, FORMAT_NONE, 0);
	format_add(shared->formats, key, "%s", value);

	free(value);
}

/* Process next item on command queue. */
u_int
cmdq_next(struct client *c)
{
	struct cmdq_list	*queue = cmdq_get(c);
	const char		*name = cmdq_name(c);
	struct cmdq_item	*item;
	enum cmd_retval		 retval;
	u_int			 items = 0;
	static u_int		 number;

	if (TAILQ_EMPTY(queue)) {
		log_debug("%s %s: empty", __func__, name);
		return (0);
	}
	if (TAILQ_FIRST(queue)->flags & CMDQ_WAITING) {
		log_debug("%s %s: waiting", __func__, name);
		return (0);
	}

	log_debug("%s %s: enter", __func__, name);
	for (;;) {
		item = TAILQ_FIRST(queue);
		if (item == NULL)
			break;
		log_debug("%s %s: %s (%d), flags %x", __func__, name,
		    item->name, item->type, item->flags);

		/*
		 * Any item with the waiting flag set waits until an external
		 * event clears the flag (for example, a job - look at
		 * run-shell).
		 */
		if (item->flags & CMDQ_WAITING)
			goto waiting;

		/*
		 * Items are only fired once, once the fired flag is set, a
		 * waiting flag can only be cleared by an external event.
		 */
		if (~item->flags & CMDQ_FIRED) {
			item->time = time(NULL);
			item->number = ++number;

			switch (item->type) {
			case CMDQ_COMMAND:
				retval = cmdq_fire_command(item);

				/*
				 * If a command returns an error, remove any
				 * subsequent commands in the same group.
				 */
				if (retval == CMD_RETURN_ERROR)
					cmdq_remove_group(item);
				break;
			case CMDQ_CALLBACK:
				retval = cmdq_fire_callback(item);
				break;
			default:
				retval = CMD_RETURN_ERROR;
				break;
			}
			item->flags |= CMDQ_FIRED;

			if (retval == CMD_RETURN_WAIT) {
				item->flags |= CMDQ_WAITING;
				goto waiting;
			}
			items++;
		}
		cmdq_remove(item);
	}

	log_debug("%s %s: exit (empty)", __func__, name);
	return (items);

waiting:
	log_debug("%s %s: exit (wait)", __func__, name);
	return (items);
}

/* Print a guard line. */
void
cmdq_guard(struct cmdq_item *item, const char *guard, int flags)
{
	struct client	*c = item->client;

	if (c == NULL || !(c->flags & CLIENT_CONTROL))
		return;

	evbuffer_add_printf(c->stdout_data, "%%%s %ld %u %d\n", guard,
	    (long)item->time, item->number, flags);
	server_client_push_stdout(c);
}

/* Show message from command. */
void
cmdq_print(struct cmdq_item *item, const char *fmt, ...)
{
	struct client	*c = item->client;
	struct window	*w;
	va_list		 ap;
	char		*tmp, *msg;

	va_start(ap, fmt);

	if (c == NULL)
		/* nothing */;
	else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
		if (~c->flags & CLIENT_UTF8) {
			xvasprintf(&tmp, fmt, ap);
			msg = utf8_sanitize(tmp);
			free(tmp);
			evbuffer_add(c->stdout_data, msg, strlen(msg));
			free(msg);
		} else
			evbuffer_add_vprintf(c->stdout_data, fmt, ap);
		evbuffer_add(c->stdout_data, "\n", 1);
		server_client_push_stdout(c);
	} else {
		w = c->session->curw->window;
		if (w->active->mode != &window_copy_mode) {
			window_pane_reset_mode(w->active);
			window_pane_set_mode(w->active, &window_copy_mode, NULL,
			    NULL);
			window_copy_init_for_output(w->active);
		}
		window_copy_vadd(w->active, fmt, ap);
	}

	va_end(ap);
}

/* Show error from command. */
void
cmdq_error(struct cmdq_item *item, const char *fmt, ...)
{
	struct client	*c = item->client;
	struct cmd	*cmd = item->cmd;
	va_list		 ap;
	char		*msg;
	size_t		 msglen;
	char		*tmp;

	va_start(ap, fmt);
	msglen = xvasprintf(&msg, fmt, ap);
	va_end(ap);

	log_debug("%s: %s", __func__, msg);

	if (c == NULL)
		cfg_add_cause("%s:%u: %s", cmd->file, cmd->line, msg);
	else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
		if (~c->flags & CLIENT_UTF8) {
			tmp = msg;
			msg = utf8_sanitize(tmp);
			free(tmp);
			msglen = strlen(msg);
		}
		evbuffer_add(c->stderr_data, msg, msglen);
		evbuffer_add(c->stderr_data, "\n", 1);
		server_client_push_stderr(c);
		c->retval = 1;
	} else {
		*msg = toupper((u_char) *msg);
		status_message_set(c, "%s", msg);
	}

	free(msg);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cmd-queue.c,v 1.58 2017/08/30 10:33:57 nicm Exp $ */
2
3			/*
4			* Copyright (c) 2013 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
21			#include <ctype.h>
22			#include <stdlib.h>
23			#include <string.h>
24			#include <time.h>
25
26			#include "tmux.h"
27
28			/* Global command queue. */
29			static struct cmdq_list global_queue = TAILQ_HEAD_INITIALIZER(global_queue);
30
31			/* Get command queue name. */
32			static const char *
33			cmdq_name(struct client *c)
34			{
35			static char s[32];
36
37			if (c == NULL)
38			return ("<global>");
39			xsnprintf(s, sizeof s, "<%p>", c);
40			return (s);
41			}
42
43			/* Get command queue from client. */
44			static struct cmdq_list *
45			cmdq_get(struct client *c)
46			{
47			if (c == NULL)
48			return (&global_queue);
49			return (&c->queue);
50			}
51
52			/* Append an item. */
53			void
54			cmdq_append(struct client c, struct cmdq_item item)
55			{
56			struct cmdq_list *queue = cmdq_get(c);
57			struct cmdq_item *next;
58
59			do {
60			next = item->next;
61			item->next = NULL;
62
63			if (c != NULL)
64			c->references++;
65			item->client = c;
66
67			item->queue = queue;
68			TAILQ_INSERT_TAIL(queue, item, entry);
69
70			item = next;
71			} while (item != NULL);
72			}
73
74			/* Insert an item. */
75			void
76			cmdq_insert_after(struct cmdq_item after, struct cmdq_item item)
77			{
78			struct client *c = after->client;
79			struct cmdq_list *queue = after->queue;
80			struct cmdq_item *next;
81
82			do {
83			next = item->next;
84			item->next = NULL;
85
86			if (c != NULL)
87			c->references++;
88			item->client = c;
89
90			item->queue = queue;
91			if (after->next != NULL)
92			TAILQ_INSERT_AFTER(queue, after->next, item, entry);
93			else
94			TAILQ_INSERT_AFTER(queue, after, item, entry);
95			after->next = item;
96
97			item = next;
98			} while (item != NULL);
99			}
100
101			/* Remove an item. */
102			static void
103			cmdq_remove(struct cmdq_item *item)
104			{
105			if (item->shared != NULL && --item->shared->references == 0) {
106			if (item->shared->formats != NULL)
107			format_free(item->shared->formats);
108			free(item->shared);
109			}
110
111			if (item->client != NULL)
112			server_client_unref(item->client);
113
114			if (item->type == CMDQ_COMMAND)
115			cmd_list_free(item->cmdlist);
116
117			TAILQ_REMOVE(item->queue, item, entry);
118
119			free((void *)item->name);
120			free(item);
121			}
122
123			/* Set command group. */
124			static u_int
125			cmdq_next_group(void)
126			{
127			static u_int group;
128
129			return (++group);
130			}
131
132			/* Remove all subsequent items that match this item's group. */
133			static void
134			cmdq_remove_group(struct cmdq_item *item)
135			{
136			struct cmdq_item this, next;
137
138			this = TAILQ_NEXT(item, entry);
139			while (this != NULL) {
140			next = TAILQ_NEXT(this, entry);
141			if (this->group == item->group)
142			cmdq_remove(this);
143			this = next;
144			}
145			}
146
147			/* Get a command for the command queue. */
148			struct cmdq_item *
149			cmdq_get_command(struct cmd_list cmdlist, struct cmd_find_state current,
150			struct mouse_event *m, int flags)
151			{
152			struct cmdq_item item, first = NULL, *last = NULL;
153			struct cmd *cmd;
154			u_int group = cmdq_next_group();
155			char *tmp;
156			struct cmdq_shared *shared;
157
158			shared = xcalloc(1, sizeof *shared);
159			if (current != NULL)
160			cmd_find_copy_state(&shared->current, current);
161			else
162			cmd_find_clear_state(&shared->current, 0);
163			if (m != NULL)
164			memcpy(&shared->mouse, m, sizeof shared->mouse);
165
166			TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
167			xasprintf(&tmp, "command[%s]", cmd->entry->name);
168
169			item = xcalloc(1, sizeof *item);
170			item->name = tmp;
171			item->type = CMDQ_COMMAND;
172
173			item->group = group;
174			item->flags = flags;
175
176			item->shared = shared;
177			item->cmdlist = cmdlist;
178			item->cmd = cmd;
179
180			shared->references++;
181			cmdlist->references++;
182
183			if (first == NULL)
184			first = item;
185			if (last != NULL)
186			last->next = item;
187			last = item;
188			}
189			return (first);
190			}
191
192			/* Fill in flag for a command. */
193			static enum cmd_retval
194			cmdq_find_flag(struct cmdq_item item, struct cmd_find_state fs,
195			const struct cmd_entry_flag *flag)
196			{
197			const char *value;
198
199			if (flag->flag == 0) {
200			cmd_find_clear_state(fs, 0);
201			return (CMD_RETURN_NORMAL);
202			}
203
204			value = args_get(item->cmd->args, flag->flag);
205			if (cmd_find_target(fs, item, value, flag->type, flag->flags) != 0) {
206			cmd_find_clear_state(fs, 0);
207			return (CMD_RETURN_ERROR);
208			}
209			return (CMD_RETURN_NORMAL);
210			}
211
212			/* Fire command on command queue. */
213			static enum cmd_retval
214			cmdq_fire_command(struct cmdq_item *item)
215			{
216			struct client *c = item->client;
217			struct cmd *cmd = item->cmd;
218			const struct cmd_entry *entry = cmd->entry;
219			enum cmd_retval retval;
220			struct cmd_find_state *fsp, fs;
221			int flags;
222
223			flags = !!(cmd->flags & CMD_CONTROL);
224			cmdq_guard(item, "begin", flags);
225
226			if (item->client == NULL)
227			item->client = cmd_find_client(item, NULL, 1);
228			retval = cmdq_find_flag(item, &item->source, &entry->source);
229			if (retval == CMD_RETURN_ERROR)
230			goto out;
231			retval = cmdq_find_flag(item, &item->target, &entry->target);
232			if (retval == CMD_RETURN_ERROR)
233			goto out;
234
235			retval = entry->exec(cmd, item);
236			if (retval == CMD_RETURN_ERROR)
237			goto out;
238
239			if (entry->flags & CMD_AFTERHOOK) {
240			if (cmd_find_valid_state(&item->target))
241			fsp = &item->target;
242			else if (cmd_find_valid_state(&item->shared->current))
243			fsp = &item->shared->current;
244			else if (cmd_find_from_client(&fs, item->client, 0) == 0)
245			fsp = &fs;
246			else
247			goto out;
248			hooks_insert(fsp->s->hooks, item, fsp, "after-%s", entry->name);
249			}
250
251			out:
252			item->client = c;
253			if (retval == CMD_RETURN_ERROR)
254			cmdq_guard(item, "error", flags);
255			else
256			cmdq_guard(item, "end", flags);
257			return (retval);
258			}
259
260			/* Get a callback for the command queue. */
261			struct cmdq_item *
262			cmdq_get_callback1(const char name, cmdq_cb cb, void data)
263			{
264			struct cmdq_item *item;
265			char *tmp;
266
267			xasprintf(&tmp, "callback[%s]", name);
268
269			item = xcalloc(1, sizeof *item);
270			item->name = tmp;
271			item->type = CMDQ_CALLBACK;
272
273			item->group = 0;
274			item->flags = 0;
275
276			item->cb = cb;
277			item->data = data;
278
279			return (item);
280			}
281
282			/* Fire callback on callback queue. */
283			static enum cmd_retval
284			cmdq_fire_callback(struct cmdq_item *item)
285			{
286			return (item->cb(item, item->data));
287			}
288
289			/* Add a format to command queue. */
290			void
291			cmdq_format(struct cmdq_item item, const char key, const char *fmt, ...)
292			{
293			struct cmdq_shared *shared = item->shared;
294			va_list ap;
295			char *value;
296
297			va_start(ap, fmt);
298			xvasprintf(&value, fmt, ap);
299			va_end(ap);
300
301			if (shared->formats == NULL)
302			shared->formats = format_create(NULL, NULL, FORMAT_NONE, 0);
303			format_add(shared->formats, key, "%s", value);
304
305			free(value);
306			}
307
308			/* Process next item on command queue. */
309			u_int
310			cmdq_next(struct client *c)
311			{
312			struct cmdq_list *queue = cmdq_get(c);
313			const char *name = cmdq_name(c);
314			struct cmdq_item *item;
315			enum cmd_retval retval;
316			u_int items = 0;
317			static u_int number;
318
319			if (TAILQ_EMPTY(queue)) {
320			log_debug("%s %s: empty", __func__, name);
321			return (0);
322			}
323			if (TAILQ_FIRST(queue)->flags & CMDQ_WAITING) {
324			log_debug("%s %s: waiting", __func__, name);
325			return (0);
326			}
327
328			log_debug("%s %s: enter", __func__, name);
329			for (;;) {
330			item = TAILQ_FIRST(queue);
331			if (item == NULL)
332			break;
333			log_debug("%s %s: %s (%d), flags %x", __func__, name,
334			item->name, item->type, item->flags);
335
336			/*
337			* Any item with the waiting flag set waits until an external
338			* event clears the flag (for example, a job - look at
339			* run-shell).
340			*/
341			if (item->flags & CMDQ_WAITING)
342			goto waiting;
343
344			/*
345			* Items are only fired once, once the fired flag is set, a
346			* waiting flag can only be cleared by an external event.
347			*/
348			if (~item->flags & CMDQ_FIRED) {
349			item->time = time(NULL);
350			item->number = ++number;
351
352			switch (item->type) {
353			case CMDQ_COMMAND:
354			retval = cmdq_fire_command(item);
355
356			/*
357			* If a command returns an error, remove any
358			* subsequent commands in the same group.
359			*/
360			if (retval == CMD_RETURN_ERROR)
361			cmdq_remove_group(item);
362			break;
363			case CMDQ_CALLBACK:
364			retval = cmdq_fire_callback(item);
365			break;
366			default:
367			retval = CMD_RETURN_ERROR;
368			break;
369			}
370			item->flags \|= CMDQ_FIRED;
371
372			if (retval == CMD_RETURN_WAIT) {
373			item->flags \|= CMDQ_WAITING;
374			goto waiting;
375			}
376			items++;
377			}
378			cmdq_remove(item);
379			}
380
381			log_debug("%s %s: exit (empty)", __func__, name);
382			return (items);
383
384			waiting:
385			log_debug("%s %s: exit (wait)", __func__, name);
386			return (items);
387			}
388
389			/* Print a guard line. */
390			void
391			cmdq_guard(struct cmdq_item item, const char guard, int flags)
392			{
393			struct client *c = item->client;
394
395			if (c == NULL \|\| !(c->flags & CLIENT_CONTROL))
396			return;
397
398			evbuffer_add_printf(c->stdout_data, "%%%s %ld %u %d\n", guard,
399			(long)item->time, item->number, flags);
400			server_client_push_stdout(c);
401			}
402
403			/* Show message from command. */
404			void
405			cmdq_print(struct cmdq_item item, const char fmt, ...)
406			{
407			struct client *c = item->client;
408			struct window *w;
409			va_list ap;
410			char tmp, msg;
411
412			va_start(ap, fmt);
413
414			if (c == NULL)
415			/* nothing */;
416			else if (c->session == NULL \|\| (c->flags & CLIENT_CONTROL)) {
417			if (~c->flags & CLIENT_UTF8) {
418			xvasprintf(&tmp, fmt, ap);
419			msg = utf8_sanitize(tmp);
420			free(tmp);
421			evbuffer_add(c->stdout_data, msg, strlen(msg));
422			free(msg);
423			} else
424			evbuffer_add_vprintf(c->stdout_data, fmt, ap);
425			evbuffer_add(c->stdout_data, "\n", 1);
426			server_client_push_stdout(c);
427			} else {
428			w = c->session->curw->window;
429			if (w->active->mode != &window_copy_mode) {
430			window_pane_reset_mode(w->active);
431			window_pane_set_mode(w->active, &window_copy_mode, NULL,
432			NULL);
433			window_copy_init_for_output(w->active);
434			}
435			window_copy_vadd(w->active, fmt, ap);
436			}
437
438			va_end(ap);
439			}
440
441			/* Show error from command. */
442			void
443			cmdq_error(struct cmdq_item item, const char fmt, ...)
444			{
445			struct client *c = item->client;
446			struct cmd *cmd = item->cmd;
447			va_list ap;
448			char *msg;
449			size_t msglen;
450			char *tmp;
451
452			va_start(ap, fmt);
453			msglen = xvasprintf(&msg, fmt, ap);
454			va_end(ap);
455
456			log_debug("%s: %s", __func__, msg);
457
458			if (c == NULL)
459			cfg_add_cause("%s:%u: %s", cmd->file, cmd->line, msg);
460			else if (c->session == NULL \|\| (c->flags & CLIENT_CONTROL)) {
461			if (~c->flags & CLIENT_UTF8) {
462			tmp = msg;
463			msg = utf8_sanitize(tmp);
464			free(tmp);
465			msglen = strlen(msg);
466			}
467			evbuffer_add(c->stderr_data, msg, msglen);
468			evbuffer_add(c->stderr_data, "\n", 1);
469			server_client_push_stderr(c);
470			c->retval = 1;
471			} else {
472			msg = toupper((u_char) msg);
473			status_message_set(c, "%s", msg);
474			}
475
476			free(msg);
477			}