control.c revision 1.17 
1/* $OpenBSD: control.c,v 1.17 2016/01/19 15:59:12 nicm Exp $ */
2
3/*
4 * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
5 * Copyright (c) 2012 George Nachman <tmux@georgester.com>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#include <sys/types.h>
21
22#include <event.h>
23#include <stdlib.h>
24#include <string.h>
25#include <time.h>
26
27#include "tmux.h"
28
29/* Write a line. */
30void
31control_write(struct client *c, const char *fmt, ...)
32{
33	va_list		 ap;
34
35	va_start(ap, fmt);
36	evbuffer_add_vprintf(c->stdout_data, fmt, ap);
37	va_end(ap);
38
39	evbuffer_add(c->stdout_data, "\n", 1);
40	server_client_push_stdout(c);
41}
42
43/* Write a buffer, adding a terminal newline. Empties buffer. */
44void
45control_write_buffer(struct client *c, struct evbuffer *buffer)
46{
47	evbuffer_add_buffer(c->stdout_data, buffer);
48	evbuffer_add(c->stdout_data, "\n", 1);
49	server_client_push_stdout(c);
50}
51
52/* Control input callback. Read lines and fire commands. */
53void
54control_callback(struct client *c, int closed, __unused void *data)
55{
56	char		*line, *cause;
57	struct cmd_list	*cmdlist;
58	struct cmd	*cmd;
59
60	if (closed)
61		c->flags |= CLIENT_EXIT;
62
63	for (;;) {
64		line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
65		if (line == NULL)
66			break;
67		if (*line == '\0') { /* empty line exit */
68			c->flags |= CLIENT_EXIT;
69			break;
70		}
71
72		if (cmd_string_parse(line, &cmdlist, NULL, 0, &cause) != 0) {
73			c->cmdq->time = time(NULL);
74			c->cmdq->number++;
75
76			cmdq_guard(c->cmdq, "begin", 1);
77			control_write(c, "parse error: %s", cause);
78			cmdq_guard(c->cmdq, "error", 1);
79
80			free(cause);
81		} else {
82			TAILQ_FOREACH(cmd, &cmdlist->list, qentry)
83				cmd->flags |= CMD_CONTROL;
84			cmdq_run(c->cmdq, cmdlist, NULL);
85			cmd_list_free(cmdlist);
86		}
87
88		free(line);
89	}
90}
91