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tmux 2.4

    1: /* $OpenBSD$ */
    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. */
   30: void
   31: control_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. */
   44: void
   45: control_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 error callback. */
   53: static enum cmd_retval
   54: control_error(struct cmdq_item *item, void *data)
   55: {
   56: 	struct client	*c = item->client;
   57: 	char		*error = data;
   58: 
   59: 	cmdq_guard(item, "begin", 1);
   60: 	control_write(c, "parse error: %s", error);
   61: 	cmdq_guard(item, "error", 1);
   62: 
   63: 	free(error);
   64: 	return (CMD_RETURN_NORMAL);
   65: }
   66: 
   67: /* Control input callback. Read lines and fire commands. */
   68: void
   69: control_callback(struct client *c, int closed, __unused void *data)
   70: {
   71: 	char			*line, *cause;
   72: 	struct cmd_list		*cmdlist;
   73: 	struct cmd		*cmd;
   74: 	struct cmdq_item	*item;
   75: 
   76: 	if (closed)
   77: 		c->flags |= CLIENT_EXIT;
   78: 
   79: 	for (;;) {
   80: 		line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
   81: 		if (line == NULL)
   82: 			break;
   83: 		if (*line == '\0') { /* empty line exit */
   84: 			c->flags |= CLIENT_EXIT;
   85: 			break;
   86: 		}
   87: 
   88: 		cmdlist = cmd_string_parse(line, NULL, 0, &cause);
   89: 		if (cmdlist == NULL) {
   90: 			item = cmdq_get_callback(control_error, cause);
   91: 			cmdq_append(c, item);
   92: 		} else {
   93: 			TAILQ_FOREACH(cmd, &cmdlist->list, qentry)
   94: 				cmd->flags |= CMD_CONTROL;
   95: 			item = cmdq_get_command(cmdlist, NULL, NULL, 0);
   96: 			cmdq_append(c, item);
   97: 			cmd_list_free(cmdlist);
   98: 		}
   99: 
  100: 		free(line);
  101: 	}
  102: }