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 39 dup(int fildes) 40 { 41 return (fcntl(fildes, F_DUPFD, 0)); 42 } 43 44 #pragma weak _dup2 = dup2 45 int 46 dup2(int fildes, int fildes2) 47 { 48 return (fcntl(fildes, F_DUP2FD, fildes2)); 49 } 50 51 int 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