1 /* $NetBSD: pty.c,v 1.4 2014/01/08 02:17:30 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 __RCSID("$NetBSD: pty.c,v 1.4 2014/01/08 02:17:30 christos Exp $");
35 #endif /* LIBC_SCCS and not lint */
36
37 #include "namespace.h"
38 #include <fcntl.h>
39 #include <string.h>
40 #include <errno.h>
41 #include <stdlib.h>
42 #include <sys/ioctl.h>
43
44 int
grantpt(int fildes)45 grantpt(int fildes)
46 {
47
48 return ioctl(fildes, TIOCGRANTPT, 0);
49 }
50
51 int
52 /*ARGSUSED*/
unlockpt(int fildes)53 unlockpt(int fildes)
54 {
55
56 return 0;
57 }
58
59 char *
ptsname(int fildes)60 ptsname(int fildes)
61 {
62 static struct ptmget pm;
63
64 if (ioctl(fildes, TIOCPTSNAME, &pm) == -1)
65 return NULL;
66
67 return pm.sn;
68 }
69
70 int
ptsname_r(int fildes,char * buf,size_t buflen)71 ptsname_r(int fildes, char *buf, size_t buflen) {
72 struct ptmget pm;
73
74 if (buf == NULL)
75 return EINVAL;
76 if (ioctl(fildes, TIOCPTSNAME, &pm) == -1)
77 return errno;
78 if (strlcpy(buf, pm.sn, buflen) > buflen)
79 return ERANGE;
80 return 0;
81 }
82