Annotation of src/usr.bin/window/wwpty.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls 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
1.2 ! deraadt 44: static char rcsid[] = "$OpenBSD: wwpty.c,v 1.3 1995/09/28 10:35:45 tls Exp $";
1.1 deraadt 45: #endif
46: #endif /* not lint */
47:
48: #include "ww.h"
49: #include <fcntl.h>
50: #if !defined(OLD_TTY) && !defined(TIOCPKT)
51: #include <sys/ioctl.h>
52: #endif
53:
54: wwgetpty(w)
55: register struct ww *w;
56: {
57: register char c, *p;
58: int tty;
59: int on = 1;
60: #define PTY "/dev/XtyXX"
61: #define _PT 5
62: #define _PQRS 8
63: #define _0_9 9
64:
65: (void) strcpy(w->ww_ttyname, PTY);
66: for (c = 'p'; c <= 'u'; c++) {
67: w->ww_ttyname[_PT] = 'p';
68: w->ww_ttyname[_PQRS] = c;
69: w->ww_ttyname[_0_9] = '0';
70: if (access(w->ww_ttyname, 0) < 0)
71: break;
72: for (p = "0123456789abcdef"; *p; p++) {
73: w->ww_ttyname[_PT] = 'p';
74: w->ww_ttyname[_0_9] = *p;
75: if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0)
76: continue;
77: w->ww_ttyname[_PT] = 't';
78: if ((tty = open(w->ww_ttyname, 2)) < 0) {
79: (void) close(w->ww_pty);
80: continue;
81: }
82: (void) close(tty);
83: if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) {
84: (void) close(w->ww_pty);
85: continue;
86: }
87: (void) fcntl(w->ww_pty, F_SETFD, 1);
88: return 0;
89: }
90: }
91: w->ww_pty = -1;
92: wwerrno = WWE_NOPTY;
93: return -1;
94: }