control.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2012 Nicholas Marriott <nicm@users.sourceforge.net>
   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 printflike2
  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_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_push_stdout(c);
  50 }
  51
  52 /* Control input callback. Read lines and fire commands. */
  53 void
  54 control_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);
  85                         cmd_list_free(cmdlist);
  86                 }
  87
  88                 free(line);
  89         }
  90 }