1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /* Copyright 2013, OmniTI Computer Consulting, Inc. All rights reserved. */
23
24 /*
25 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1988 AT&T */
30 /* All Rights Reserved */
31
32 #include "lint.h"
33 #include <sys/types.h>
34 #include <fcntl.h>
35 #include <errno.h>
36
37 #pragma weak _dup = dup
38 int
dup(int fildes)39 dup(int fildes)
40 {
41 return (fcntl(fildes, F_DUPFD, 0));
42 }
43
44 #pragma weak _dup2 = dup2
45 int
dup2(int fildes,int fildes2)46 dup2(int fildes, int fildes2)
47 {
48 return (fcntl(fildes, F_DUP2FD, fildes2));
49 }
50
51 int
dup3(int fildes,int fildes2,int flags)52 dup3(int fildes, int fildes2, int flags)
53 {
54 /*
55 * The only valid flag is O_CLOEXEC.
56 */
57 if (flags & ~O_CLOEXEC) {
58 errno = EINVAL;
59 return (-1);
60 }
61
62 /*
63 * This call differs from dup2 such that it is an error when
64 * fildes == fildes2
65 */
66 if (fildes == fildes2) {
67 errno = EINVAL;
68 return (-1);
69 }
70
71 return (fcntl(fildes, (flags == 0) ? F_DUP2FD : F_DUP2FD_CLOEXEC,
72 fildes2));
73 }
74