1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wwpty.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/wwpty.c,v 1.2.2.1 2001/05/17 09:45:01 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/wwpty.c,v 1.2 2003/06/17 04:29:34 dillon Exp $ 39 */ 40 41 #include "ww.h" 42 #include <fcntl.h> 43 #if !defined(OLD_TTY) && !defined(TIOCPKT) 44 #include <sys/ioctl.h> 45 #endif 46 47 wwgetpty(w) 48 register struct ww *w; 49 { 50 register char c, *p; 51 int tty; 52 int on = 1; 53 #define PTY "/dev/XtyXX" 54 #define _PT 5 55 #define _PQRS 8 56 #define _0_9 9 57 58 (void) strcpy(w->ww_ttyname, PTY); 59 for (c = 'p'; c <= 'u'; c++) { 60 w->ww_ttyname[_PT] = 'p'; 61 w->ww_ttyname[_PQRS] = c; 62 w->ww_ttyname[_0_9] = '0'; 63 if (access(w->ww_ttyname, 0) < 0) 64 break; 65 for (p = "0123456789abcdefghijklmnopqrstuv"; *p; p++) { 66 w->ww_ttyname[_PT] = 'p'; 67 w->ww_ttyname[_0_9] = *p; 68 if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0) 69 continue; 70 w->ww_ttyname[_PT] = 't'; 71 if ((tty = open(w->ww_ttyname, 2)) < 0) { 72 (void) close(w->ww_pty); 73 continue; 74 } 75 (void) close(tty); 76 if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) { 77 (void) close(w->ww_pty); 78 continue; 79 } 80 (void) fcntl(w->ww_pty, F_SETFD, 1); 81 return 0; 82 } 83 } 84 w->ww_pty = -1; 85 wwerrno = WWE_NOPTY; 86 return -1; 87 } 88