1 /** @file 2 3 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR> 4 This program and the accompanying materials are licensed and made available under 5 the terms and conditions of the BSD License that accompanies this distribution. 6 The full text of the license may be found at 7 http://opensource.org/licenses/bsd-license. 8 9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 12 * Copyright (c) 1989, 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. 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 * @(#)unistd.h 8.2 (Berkeley) 1/7/94 40 NetBSD: unistd.h,v 1.35 2006/08/14 18:17:48 rpaulo Exp 41 **/ 42 #ifndef _SYS_UNISTD_H_ 43 #define _SYS_UNISTD_H_ 44 45 #include <sys/featuretest.h> 46 47 /* compile-time symbolic constants */ 48 49 /* 50 * According to POSIX 1003.1: 51 * "The saved set-user-ID capability allows a program to regain the 52 * effective user ID established at the last exec call." 53 * However, the setuid/setgid function as specified by POSIX 1003.1 does 54 * not allow changing the effective ID from the super-user without also 55 * changed the saved ID, so it is impossible to get super-user privileges 56 * back later. Instead we provide this feature independent of the current 57 * effective ID through the seteuid/setegid function. In addition, we do 58 * not use the saved ID as specified by POSIX 1003.1 in setuid/setgid, 59 * because this would make it impossible for a set-user-ID executable 60 * owned by a user other than the super-user to permanently revoke its 61 * extra privileges. 62 */ 63 #ifdef _NOT_AVAILABLE 64 #define _POSIX_SAVED_IDS /* saved set-user-ID and set-group-ID */ 65 #endif 66 67 #define _POSIX_VERSION 199009L 68 #define _POSIX2_VERSION 199212L 69 70 /* execution-time symbolic constants */ 71 /* timers */ 72 #define _POSIX_TIMERS 200112L 73 74 /* Always ensure that these are consistent with <fcntl.h>! 75 whence values for lseek(2). 76 */ 77 #ifndef SEEK_SET 78 #define SEEK_SET 0 /**< set file offset to offset */ 79 #endif 80 #ifndef SEEK_CUR 81 #define SEEK_CUR 1 /**< set file offset to current plus offset */ 82 #endif 83 #ifndef SEEK_END 84 #define SEEK_END 2 /**< set file offset to EOF plus offset */ 85 #endif 86 87 /* whence values for lseek(2); renamed by POSIX 1003.1 */ 88 #define L_SET SEEK_SET 89 #define L_INCR SEEK_CUR 90 #define L_XTND SEEK_END 91 92 /* configurable system strings */ 93 #define _CS_PATH 1 94 95 #endif /* !_SYS_UNISTD_H_ */ 96
