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Annotation of src/usr.bin/window/wwpty.c, Revision 1.1.1.1

1.1       deraadt     1: /*     $NetBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls Exp $    */
                      2:
                      3: /*
                      4:  * Copyright (c) 1983, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Edward Wang at The University of California, Berkeley.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  */
                     38:
                     39: #ifndef lint
                     40: #if 0
                     41: static char sccsid[] = "@(#)wwpty.c    8.1 (Berkeley) 6/6/93";
                     42: #else
                     43: static char rcsid[] = "$NetBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls Exp $";
                     44: #endif
                     45: #endif /* not lint */
                     46:
                     47: #include "ww.h"
                     48: #include <fcntl.h>
                     49: #if !defined(OLD_TTY) && !defined(TIOCPKT)
                     50: #include <sys/ioctl.h>
                     51: #endif
                     52:
                     53: wwgetpty(w)
                     54: register struct ww *w;
                     55: {
                     56:        register char c, *p;
                     57:        int tty;
                     58:        int on = 1;
                     59: #define PTY "/dev/XtyXX"
                     60: #define _PT    5
                     61: #define _PQRS  8
                     62: #define _0_9   9
                     63:
                     64:        (void) strcpy(w->ww_ttyname, PTY);
                     65:        for (c = 'p'; c <= 'u'; c++) {
                     66:                w->ww_ttyname[_PT] = 'p';
                     67:                w->ww_ttyname[_PQRS] = c;
                     68:                w->ww_ttyname[_0_9] = '0';
                     69:                if (access(w->ww_ttyname, 0) < 0)
                     70:                        break;
                     71:                for (p = "0123456789abcdef"; *p; p++) {
                     72:                        w->ww_ttyname[_PT] = 'p';
                     73:                        w->ww_ttyname[_0_9] = *p;
                     74:                        if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0)
                     75:                                continue;
                     76:                        w->ww_ttyname[_PT] = 't';
                     77:                        if ((tty = open(w->ww_ttyname, 2)) < 0) {
                     78:                                (void) close(w->ww_pty);
                     79:                                continue;
                     80:                        }
                     81:                        (void) close(tty);
                     82:                        if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) {
                     83:                                (void) close(w->ww_pty);
                     84:                                continue;
                     85:                        }
                     86:                        (void) fcntl(w->ww_pty, F_SETFD, 1);
                     87:                        return 0;
                     88:                }
                     89:        }
                     90:        w->ww_pty = -1;
                     91:        wwerrno = WWE_NOPTY;
                     92:        return -1;
                     93: }