usr.bin/window/wwpty.c

   1 /*      @(#)wwpty.c     8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwpty.c,v 1.8 2003/08/07 11:17:42 agc Exp $    */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #if !defined(OLD_TTY) && !defined(TIOCPKT)
  37 #include <sys/ioctl.h>
  38 #endif
  39 #include <fcntl.h>
  40 #include <libutil.h>
  41 #include "ww.h"
  42
  43 int
  44 wwgetpty(struct ww *w)
  45 {
  46         int on = 1;
  47         int result, tty;
  48
  49         result = openpty(&w->ww_pty, &tty, w->ww_ttyname, NULL, NULL);
  50         if (result < 0) {
  51                 w->ww_pty = -1;
  52                 wwerrno = WWE_NOPTY;
  53                 return -1;
  54         } else {
  55                 (void) ioctl(w->ww_pty, TIOCPKT, (char *)&on);
  56                 (void) fcntl(w->ww_pty, F_SETFD, 1);
  57                 return 0;
  58         }
  59 }