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
  26 #include "tmux.h"
  27
  28 /* Write a line. */
  29 void printflike2
  30 control_write(struct client *c, const char *fmt, ...)
  31 {
  32         va_list          ap;
  33
  34         va_start(ap, fmt);
  35         evbuffer_add_vprintf(c->stdout_data, fmt, ap);
  36         va_end(ap);
  37
  38         evbuffer_add(c->stdout_data, "\n", 1);
  39         server_push_stdout(c);
  40 }
  41
  42 /* Write a buffer, adding a terminal newline. Empties buffer. */
  43 void
  44 control_write_buffer(struct client *c, struct evbuffer *buffer)
  45 {
  46         evbuffer_add_buffer(c->stdout_data, buffer);
  47         evbuffer_add(c->stdout_data, "\n", 1);
  48         server_push_stdout(c);
  49 }
  50
  51 /* Control input callback. Read lines and fire commands. */
  52 void
  53 control_callback(struct client *c, int closed, unused void *data)
  54 {
  55         char            *line, *cause;
  56         struct cmd_list *cmdlist;
  57
  58         if (closed)
  59                 c->flags |= CLIENT_EXIT;
  60
  61         for (;;) {
  62                 line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
  63                 if (line == NULL)
  64                         break;
  65                 if (*line == '\0') { /* empty line exit */
  66                         c->flags |= CLIENT_EXIT;
  67                         break;
  68                 }
  69
  70                 if (cmd_string_parse(line, &cmdlist, NULL, 0, &cause) != 0) {
  71                         control_write(c, "%%error in line \"%s\": %s", line,
  72                             cause);
  73                         free(cause);
  74                 } else {
  75                         cmdq_run(c->cmdq, cmdlist);
  76                         cmd_list_free(cmdlist);
  77                 }
  78
  79                 free(line);
  80         }
  81 }