1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)unistd.h 8.2 (Berkeley) 1/7/94 32 */ 33 34 #ifndef _SYS_UNISTD_H_ 35 #define _SYS_UNISTD_H_ 36 37 #include <sys/cdefs.h> 38 39 /* 40 * POSIX options and option groups we unconditionally do or don't 41 * implement. Those options which are implemented (or not) entirely 42 * in user mode are defined in <unistd.h>. Please keep this list in 43 * alphabetical order. 44 * 45 * Anything which is defined as zero below **must** have an 46 * implementation for the corresponding sysconf() which is able to 47 * determine conclusively whether or not the feature is supported. 48 * Anything which is defined as other than -1 below **must** have 49 * complete headers, types, and function declarations as specified by 50 * the POSIX standard; however, if the relevant sysconf() function 51 * returns -1, the functions may be stubbed out. 52 */ 53 #define _POSIX_ADVISORY_INFO 200112L 54 #define _POSIX_ASYNCHRONOUS_IO 200112L 55 #define _POSIX_CHOWN_RESTRICTED 1 56 #define _POSIX_CLOCK_SELECTION (-1) 57 #define _POSIX_CPUTIME 200112L 58 #define _POSIX_FSYNC 200112L 59 #define _POSIX_IPV6 0 60 #define _POSIX_JOB_CONTROL 1 61 #define _POSIX_MAPPED_FILES 200112L 62 #define _POSIX_MEMLOCK (-1) 63 #define _POSIX_MEMLOCK_RANGE 200112L 64 #define _POSIX_MEMORY_PROTECTION 200112L 65 #define _POSIX_MESSAGE_PASSING 200112L 66 #define _POSIX_MONOTONIC_CLOCK 200112L 67 #define _POSIX_NO_TRUNC 1 68 #define _POSIX_PRIORITIZED_IO (-1) 69 #define _POSIX_PRIORITY_SCHEDULING 0 70 #define _POSIX_RAW_SOCKETS 200112L 71 #define _POSIX_REALTIME_SIGNALS 200112L 72 #define _POSIX_SEMAPHORES 200112L 73 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L 74 #define _POSIX_SPORADIC_SERVER (-1) 75 #define _POSIX_SYNCHRONIZED_IO (-1) 76 #define _POSIX_TIMEOUTS 200112L 77 #define _POSIX_TIMERS 200112L 78 #define _POSIX_TYPED_MEMORY_OBJECTS (-1) 79 #define _POSIX_VDISABLE 0xff 80 81 #if __XSI_VISIBLE 82 #define _XOPEN_SHM 1 83 #define _XOPEN_STREAMS (-1) 84 #endif 85 86 /* 87 * Although we have saved user/group IDs, we do not use them in setuid 88 * as described in POSIX 1003.1, because the feature does not work for 89 * root. We use the saved IDs in seteuid/setegid, which are not currently 90 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001 91 * as this is now mandatory. 92 */ 93 #ifdef _NOT_AVAILABLE 94 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */ 95 #endif 96 97 /* Define the POSIX.1 version we target for compliance. */ 98 #define _POSIX_VERSION 200112L 99 100 /* access function */ 101 #define F_OK 0 /* test for existence of file */ 102 #define X_OK 0x01 /* test for execute or search permission */ 103 #define W_OK 0x02 /* test for write permission */ 104 #define R_OK 0x04 /* test for read permission */ 105 106 /* whence values for lseek(2) */ 107 #ifndef SEEK_SET 108 #define SEEK_SET 0 /* set file offset to offset */ 109 #define SEEK_CUR 1 /* set file offset to current plus offset */ 110 #define SEEK_END 2 /* set file offset to EOF plus offset */ 111 #endif 112 #if __BSD_VISIBLE 113 #define SEEK_DATA 3 /* set file offset to next data past offset */ 114 #define SEEK_HOLE 4 /* set file offset to next hole past offset */ 115 #endif 116 117 #ifndef _POSIX_SOURCE 118 /* whence values for lseek(2); renamed by POSIX 1003.1 */ 119 #define L_SET SEEK_SET 120 #define L_INCR SEEK_CUR 121 #define L_XTND SEEK_END 122 #endif 123 124 /* configurable pathname variables */ 125 #define _PC_LINK_MAX 1 126 #define _PC_MAX_CANON 2 127 #define _PC_MAX_INPUT 3 128 #define _PC_NAME_MAX 4 129 #define _PC_PATH_MAX 5 130 #define _PC_PIPE_BUF 6 131 #define _PC_CHOWN_RESTRICTED 7 132 #define _PC_NO_TRUNC 8 133 #define _PC_VDISABLE 9 134 135 #if __POSIX_VISIBLE >= 199309 136 #define _PC_ASYNC_IO 53 137 #define _PC_PRIO_IO 54 138 #define _PC_SYNC_IO 55 139 #endif 140 141 #if __POSIX_VISIBLE >= 200112 142 #define _PC_ALLOC_SIZE_MIN 10 143 #define _PC_FILESIZEBITS 12 144 #define _PC_REC_INCR_XFER_SIZE 14 145 #define _PC_REC_MAX_XFER_SIZE 15 146 #define _PC_REC_MIN_XFER_SIZE 16 147 #define _PC_REC_XFER_ALIGN 17 148 #define _PC_SYMLINK_MAX 18 149 #endif 150 151 #if __BSD_VISIBLE 152 #define _PC_ACL_EXTENDED 59 153 #define _PC_ACL_PATH_MAX 60 154 #define _PC_CAP_PRESENT 61 155 #define _PC_INF_PRESENT 62 156 #define _PC_MAC_PRESENT 63 157 #define _PC_ACL_NFS4 64 158 #define _PC_DEALLOC_PRESENT 65 159 #endif 160 161 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */ 162 #define _PC_MIN_HOLE_SIZE 21 163 164 #if __BSD_VISIBLE 165 /* 166 * rfork() options. 167 * 168 * XXX currently, some operations without RFPROC set are not supported. 169 */ 170 #define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */ 171 #define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */ 172 #define RFFDG (1<<2) /* copy fd table */ 173 #define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */ 174 #define RFPROC (1<<4) /* change child (else changes curproc) */ 175 #define RFMEM (1<<5) /* share `address space' */ 176 #define RFNOWAIT (1<<6) /* give child to init */ 177 #define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */ 178 #define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */ 179 #define RFCFDG (1<<12) /* close all fds, zero fd table */ 180 #define RFTHREAD (1<<13) /* enable kernel thread support */ 181 #define RFSIGSHARE (1<<14) /* share signal handlers */ 182 #define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */ 183 #define RFSTOPPED (1<<17) /* leave child in a stopped state */ 184 #define RFHIGHPID (1<<18) /* use a pid higher than 10 (idleproc) */ 185 #define RFTSIGZMB (1<<19) /* select signal for exit parent notification */ 186 #define RFTSIGSHIFT 20 /* selected signal number is in bits 20-27 */ 187 #define RFTSIGMASK 0xFF 188 #define RFTSIGNUM(flags) (((flags) >> RFTSIGSHIFT) & RFTSIGMASK) 189 #define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT) 190 #define RFPROCDESC (1<<28) /* return a process descriptor */ 191 /* kernel: parent sleeps until child exits (vfork) */ 192 #define RFPPWAIT (1<<31) 193 /* user: vfork(2) semantics, clear signals */ 194 #define RFSPAWN (1U<<31) 195 #define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \ 196 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \ 197 RFPROCDESC | RFSPAWN | RFPPWAIT) 198 #define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPROCDESC) 199 200 #define SWAPOFF_FORCE 0x00000001 201 202 /* 203 * close_range() options. 204 */ 205 #define CLOSE_RANGE_CLOEXEC (1<<2) 206 207 #endif /* __BSD_VISIBLE */ 208 209 #endif /* !_SYS_UNISTD_H_ */ 210