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/* $OpenBSD: wwpty.c,v 1.4 1998/04/26 22:49:00 millert Exp $ */
/* $NetBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)wwpty.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$OpenBSD: wwpty.c,v 1.4 1998/04/26 22:49:00 millert Exp $";
#endif
#endif /* not lint */
#include "ww.h"
#include <string.h>
#include <fcntl.h>
#if !defined(OLD_TTY) && !defined(TIOCPKT)
#include <sys/ioctl.h>
#endif
wwgetpty(w)
register struct ww *w;
{
register char c, *p;
int tty;
int on = 1;
#define PTY "/dev/XtyXX"
#define _PT 5
#define _PQRS 8
#define _0_9 9
(void) strcpy(w->ww_ttyname, PTY);
for (c = 'p'; c <= 'u'; c++) {
w->ww_ttyname[_PT] = 'p';
w->ww_ttyname[_PQRS] = c;
w->ww_ttyname[_0_9] = '0';
if (access(w->ww_ttyname, 0) < 0)
break;
for (p = "0123456789abcdef"; *p; p++) {
w->ww_ttyname[_PT] = 'p';
w->ww_ttyname[_0_9] = *p;
if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0)
continue;
w->ww_ttyname[_PT] = 't';
if ((tty = open(w->ww_ttyname, 2)) < 0) {
(void) close(w->ww_pty);
continue;
}
(void) close(tty);
if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) {
(void) close(w->ww_pty);
continue;
}
(void) fcntl(w->ww_pty, F_SETFD, 1);
return 0;
}
}
w->ww_pty = -1;
wwerrno = WWE_NOPTY;
return -1;
}
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