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Annotation of src/usr.bin/window/wwpty.c, Revision 1.5

1.5     ! mpech       1: /*     $OpenBSD: wwpty.c,v 1.4 1998/04/26 22:49:00 millert Exp $       */
1.1       deraadt     2: /*     $NetBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls Exp $    */
                      3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Edward Wang at The University of California, Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the University of
                     22:  *     California, Berkeley and its contributors.
                     23:  * 4. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef lint
                     41: #if 0
                     42: static char sccsid[] = "@(#)wwpty.c    8.1 (Berkeley) 6/6/93";
                     43: #else
1.5     ! mpech      44: static char rcsid[] = "$OpenBSD: wwpty.c,v 1.4 1998/04/26 22:49:00 millert Exp $";
1.1       deraadt    45: #endif
                     46: #endif /* not lint */
                     47:
                     48: #include "ww.h"
1.4       millert    49: #include <string.h>
1.1       deraadt    50: #include <fcntl.h>
                     51: #if !defined(OLD_TTY) && !defined(TIOCPKT)
                     52: #include <sys/ioctl.h>
                     53: #endif
                     54:
                     55: wwgetpty(w)
1.5     ! mpech      56: struct ww *w;
1.1       deraadt    57: {
1.5     ! mpech      58:        char c, *p;
1.1       deraadt    59:        int tty;
                     60:        int on = 1;
                     61: #define PTY "/dev/XtyXX"
                     62: #define _PT    5
                     63: #define _PQRS  8
                     64: #define _0_9   9
                     65:
                     66:        (void) strcpy(w->ww_ttyname, PTY);
                     67:        for (c = 'p'; c <= 'u'; c++) {
                     68:                w->ww_ttyname[_PT] = 'p';
                     69:                w->ww_ttyname[_PQRS] = c;
                     70:                w->ww_ttyname[_0_9] = '0';
                     71:                if (access(w->ww_ttyname, 0) < 0)
                     72:                        break;
                     73:                for (p = "0123456789abcdef"; *p; p++) {
                     74:                        w->ww_ttyname[_PT] = 'p';
                     75:                        w->ww_ttyname[_0_9] = *p;
                     76:                        if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0)
                     77:                                continue;
                     78:                        w->ww_ttyname[_PT] = 't';
                     79:                        if ((tty = open(w->ww_ttyname, 2)) < 0) {
                     80:                                (void) close(w->ww_pty);
                     81:                                continue;
                     82:                        }
                     83:                        (void) close(tty);
                     84:                        if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) {
                     85:                                (void) close(w->ww_pty);
                     86:                                continue;
                     87:                        }
                     88:                        (void) fcntl(w->ww_pty, F_SETFD, 1);
                     89:                        return 0;
                     90:                }
                     91:        }
                     92:        w->ww_pty = -1;
                     93:        wwerrno = WWE_NOPTY;
                     94:        return -1;
                     95: }