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 <fcntl.h> 42 #include <string.h> 43 44 #include "ww.h" 45 46 #if !defined(OLD_TTY) && !defined(TIOCPKT) 47 #include <sys/ioctl.h> 48 #endif 49 50 wwgetpty(w) 51 register struct ww *w; 52 { 53 register char c, *p; 54 int tty; 55 int on = 1; 56 #define PTY "/dev/XtyXX" 57 #define _PT 5 58 #define _PQRS 8 59 #define _0_9 9 60 61 (void) strcpy(w->ww_ttyname, PTY); 62 for (c = 'p'; c <= 'u'; c++) { 63 w->ww_ttyname[_PT] = 'p'; 64 w->ww_ttyname[_PQRS] = c; 65 w->ww_ttyname[_0_9] = '0'; 66 if (access(w->ww_ttyname, 0) < 0) 67 break; 68 for (p = "0123456789abcdefghijklmnopqrstuv"; *p; p++) { 69 w->ww_ttyname[_PT] = 'p'; 70 w->ww_ttyname[_0_9] = *p; 71 if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0) 72 continue; 73 w->ww_ttyname[_PT] = 't'; 74 if ((tty = open(w->ww_ttyname, 2)) < 0) { 75 (void) close(w->ww_pty); 76 continue; 77 } 78 (void) close(tty); 79 if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) { 80 (void) close(w->ww_pty); 81 continue; 82 } 83 (void) fcntl(w->ww_pty, F_SETFD, 1); 84 return 0; 85 } 86 } 87 w->ww_pty = -1; 88 wwerrno = WWE_NOPTY; 89 return -1; 90 } 91