unistd.h revision 331722
1/*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)unistd.h 8.2 (Berkeley) 1/7/94 30 * $FreeBSD: stable/11/sys/sys/unistd.h 331722 2018-03-29 02:50:57Z eadler $ 31 */ 32 33#ifndef _SYS_UNISTD_H_ 34#define _SYS_UNISTD_H_ 35 36#include <sys/cdefs.h> 37 38/* 39 * POSIX options and option groups we unconditionally do or don't 40 * implement. Those options which are implemented (or not) entirely 41 * in user mode are defined in <unistd.h>. Please keep this list in 42 * alphabetical order. 43 * 44 * Anything which is defined as zero below **must** have an 45 * implementation for the corresponding sysconf() which is able to 46 * determine conclusively whether or not the feature is supported. 47 * Anything which is defined as other than -1 below **must** have 48 * complete headers, types, and function declarations as specified by 49 * the POSIX standard; however, if the relevant sysconf() function 50 * returns -1, the functions may be stubbed out. 51 */ 52#define _POSIX_ADVISORY_INFO 200112L 53#define _POSIX_ASYNCHRONOUS_IO 200112L 54#define _POSIX_CHOWN_RESTRICTED 1 55#define _POSIX_CLOCK_SELECTION (-1) 56#define _POSIX_CPUTIME 200112L 57#define _POSIX_FSYNC 200112L 58#define _POSIX_IPV6 0 59#define _POSIX_JOB_CONTROL 1 60#define _POSIX_MAPPED_FILES 200112L 61#define _POSIX_MEMLOCK (-1) 62#define _POSIX_MEMLOCK_RANGE 200112L 63#define _POSIX_MEMORY_PROTECTION 200112L 64#define _POSIX_MESSAGE_PASSING 200112L 65#define _POSIX_MONOTONIC_CLOCK 200112L 66#define _POSIX_NO_TRUNC 1 67#define _POSIX_PRIORITIZED_IO (-1) 68#define _POSIX_PRIORITY_SCHEDULING 0 69#define _POSIX_RAW_SOCKETS 200112L 70#define _POSIX_REALTIME_SIGNALS 200112L 71#define _POSIX_SEMAPHORES 200112L 72#define _POSIX_SHARED_MEMORY_OBJECTS 200112L 73#define _POSIX_SPORADIC_SERVER (-1) 74#define _POSIX_SYNCHRONIZED_IO (-1) 75#define _POSIX_TIMEOUTS 200112L 76#define _POSIX_TIMERS 200112L 77#define _POSIX_TYPED_MEMORY_OBJECTS (-1) 78#define _POSIX_VDISABLE 0xff 79 80#if __XSI_VISIBLE 81#define _XOPEN_SHM 1 82#define _XOPEN_STREAMS (-1) 83#endif 84 85/* 86 * Although we have saved user/group IDs, we do not use them in setuid 87 * as described in POSIX 1003.1, because the feature does not work for 88 * root. We use the saved IDs in seteuid/setegid, which are not currently 89 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001 90 * as this is now mandatory. 91 */ 92#ifdef _NOT_AVAILABLE 93#define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */ 94#endif 95 96/* Define the POSIX.1 version we target for compliance. */ 97#define _POSIX_VERSION 200112L 98 99/* access function */ 100#define F_OK 0 /* test for existence of file */ 101#define X_OK 0x01 /* test for execute or search permission */ 102#define W_OK 0x02 /* test for write permission */ 103#define R_OK 0x04 /* test for read permission */ 104 105/* whence values for lseek(2) */ 106#ifndef SEEK_SET 107#define SEEK_SET 0 /* set file offset to offset */ 108#define SEEK_CUR 1 /* set file offset to current plus offset */ 109#define SEEK_END 2 /* set file offset to EOF plus offset */ 110#endif 111#if __BSD_VISIBLE 112#define SEEK_DATA 3 /* set file offset to next data past offset */ 113#define SEEK_HOLE 4 /* set file offset to next hole past offset */ 114#endif 115 116#ifndef _POSIX_SOURCE 117/* whence values for lseek(2); renamed by POSIX 1003.1 */ 118#define L_SET SEEK_SET 119#define L_INCR SEEK_CUR 120#define L_XTND SEEK_END 121#endif 122 123/* configurable pathname variables */ 124#define _PC_LINK_MAX 1 125#define _PC_MAX_CANON 2 126#define _PC_MAX_INPUT 3 127#define _PC_NAME_MAX 4 128#define _PC_PATH_MAX 5 129#define _PC_PIPE_BUF 6 130#define _PC_CHOWN_RESTRICTED 7 131#define _PC_NO_TRUNC 8 132#define _PC_VDISABLE 9 133 134#if __POSIX_VISIBLE >= 199309 135#define _PC_ASYNC_IO 53 136#define _PC_PRIO_IO 54 137#define _PC_SYNC_IO 55 138#endif 139 140#if __POSIX_VISIBLE >= 200112 141#define _PC_ALLOC_SIZE_MIN 10 142#define _PC_FILESIZEBITS 12 143#define _PC_REC_INCR_XFER_SIZE 14 144#define _PC_REC_MAX_XFER_SIZE 15 145#define _PC_REC_MIN_XFER_SIZE 16 146#define _PC_REC_XFER_ALIGN 17 147#define _PC_SYMLINK_MAX 18 148#endif 149 150#if __BSD_VISIBLE 151#define _PC_ACL_EXTENDED 59 152#define _PC_ACL_PATH_MAX 60 153#define _PC_CAP_PRESENT 61 154#define _PC_INF_PRESENT 62 155#define _PC_MAC_PRESENT 63 156#define _PC_ACL_NFS4 64 157#endif 158 159/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */ 160#define _PC_MIN_HOLE_SIZE 21 161 162#if __BSD_VISIBLE 163/* 164 * rfork() options. 165 * 166 * XXX currently, some operations without RFPROC set are not supported. 167 */ 168#define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */ 169#define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */ 170#define RFFDG (1<<2) /* copy fd table */ 171#define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */ 172#define RFPROC (1<<4) /* change child (else changes curproc) */ 173#define RFMEM (1<<5) /* share `address space' */ 174#define RFNOWAIT (1<<6) /* give child to init */ 175#define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */ 176#define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */ 177#define RFCFDG (1<<12) /* close all fds, zero fd table */ 178#define RFTHREAD (1<<13) /* enable kernel thread support */ 179#define RFSIGSHARE (1<<14) /* share signal handlers */ 180#define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */ 181#define RFSTOPPED (1<<17) /* leave child in a stopped state */ 182#define RFHIGHPID (1<<18) /* use a pid higher than 10 (idleproc) */ 183#define RFTSIGZMB (1<<19) /* select signal for exit parent notification */ 184#define RFTSIGSHIFT 20 /* selected signal number is in bits 20-27 */ 185#define RFTSIGMASK 0xFF 186#define RFTSIGNUM(flags) (((flags) >> RFTSIGSHIFT) & RFTSIGMASK) 187#define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT) 188#define RFPROCDESC (1<<28) /* return a process descriptor */ 189#define RFPPWAIT (1<<31) /* parent sleeps until child exits (vfork) */ 190#define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \ 191 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \ 192 RFPROCDESC | RFPPWAIT) 193#define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPPWAIT | RFPROCDESC) 194 195#endif /* __BSD_VISIBLE */ 196 197#endif /* !_SYS_UNISTD_H_ */ 198