88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
/*
|
|
* 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
|
|
static char sccsid[] = "@(#)wwpty.c 8.1 (Berkeley) 6/6/93";
|
|
#endif /* not lint */
|
|
|
|
#include "ww.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;
|
|
}
|