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 37 #ifndef lint 38 static char sccsid[] = "@(#)wwpty.c 8.1 (Berkeley) 6/6/93"; 39 static char rcsid[] = 40 "$FreeBSD: src/usr.bin/window/wwpty.c,v 1.2.2.1 2001/05/17 09:45:01 obrien Exp $"; 41 #endif /* not lint */ 42 43 #include "ww.h" 44 #include <fcntl.h> 45 #if !defined(OLD_TTY) && !defined(TIOCPKT) 46 #include <sys/ioctl.h> 47 #endif 48 49 wwgetpty(w) 50 register struct ww *w; 51 { 52 register char c, *p; 53 int tty; 54 int on = 1; 55 #define PTY "/dev/XtyXX" 56 #define _PT 5 57 #define _PQRS 8 58 #define _0_9 9 59 60 (void) strcpy(w->ww_ttyname, PTY); 61 for (c = 'p'; c <= 'u'; c++) { 62 w->ww_ttyname[_PT] = 'p'; 63 w->ww_ttyname[_PQRS] = c; 64 w->ww_ttyname[_0_9] = '0'; 65 if (access(w->ww_ttyname, 0) < 0) 66 break; 67 for (p = "0123456789abcdefghijklmnopqrstuv"; *p; p++) { 68 w->ww_ttyname[_PT] = 'p'; 69 w->ww_ttyname[_0_9] = *p; 70 if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0) 71 continue; 72 w->ww_ttyname[_PT] = 't'; 73 if ((tty = open(w->ww_ttyname, 2)) < 0) { 74 (void) close(w->ww_pty); 75 continue; 76 } 77 (void) close(tty); 78 if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) { 79 (void) close(w->ww_pty); 80 continue; 81 } 82 (void) fcntl(w->ww_pty, F_SETFD, 1); 83 return 0; 84 } 85 } 86 w->ww_pty = -1; 87 wwerrno = WWE_NOPTY; 88 return -1; 89 } 90