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 32 #ifndef _SYS_UNISTD_H_ 33 #define _SYS_UNISTD_H_ 34 35 #include <sys/cdefs.h> 36 37 /* 38 * POSIX options and option groups we unconditionally do or don't 39 * implement. Those options which are implemented (or not) entirely 40 * in user mode are defined in <unistd.h>. Please keep this list in 41 * alphabetical order. 42 * 43 * Anything which is defined as zero below **must** have an 44 * implementation for the corresponding sysconf() which is able to 45 * determine conclusively whether or not the feature is supported. 46 * Anything which is defined as other than -1 below **must** have 47 * complete headers, types, and function declarations as specified by 48 * the POSIX standard; however, if the relevant sysconf() function 49 * returns -1, the functions may be stubbed out. 50 */ 51 #define _POSIX_ADVISORY_INFO 200112L 52 #define _POSIX_ASYNCHRONOUS_IO 200112L 53 #define _POSIX_CHOWN_RESTRICTED 1 54 #define _POSIX_CLOCK_SELECTION (-1) 55 #define _POSIX_CPUTIME 200112L 56 #define _POSIX_FSYNC 200112L 57 #define _POSIX_IPV6 0 58 #define _POSIX_JOB_CONTROL 1 59 #define _POSIX_MAPPED_FILES 200112L 60 #define _POSIX_MEMLOCK (-1) 61 #define _POSIX_MEMLOCK_RANGE 200112L 62 #define _POSIX_MEMORY_PROTECTION 200112L 63 #define _POSIX_MESSAGE_PASSING 200112L 64 #define _POSIX_MONOTONIC_CLOCK 200112L 65 #define _POSIX_NO_TRUNC 1 66 #define _POSIX_PRIORITIZED_IO (-1) 67 #define _POSIX_PRIORITY_SCHEDULING 0 68 #define _POSIX_RAW_SOCKETS 200112L 69 #define _POSIX_REALTIME_SIGNALS 200112L 70 #define _POSIX_SEMAPHORES 200112L 71 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L 72 #define _POSIX_SPORADIC_SERVER (-1) 73 #define _POSIX_SYNCHRONIZED_IO (-1) 74 #define _POSIX_TIMEOUTS 200112L 75 #define _POSIX_TIMERS 200112L 76 #define _POSIX_TYPED_MEMORY_OBJECTS (-1) 77 #define _POSIX_VDISABLE 0xff 78 79 #if __XSI_VISIBLE 80 #define _XOPEN_SHM 1 81 #define _XOPEN_STREAMS (-1) 82 #endif 83 84 /* 85 * Although we have saved user/group IDs, we do not use them in setuid 86 * as described in POSIX 1003.1, because the feature does not work for 87 * root. We use the saved IDs in seteuid/setegid, which are not currently 88 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001 89 * as this is now mandatory. 90 */ 91 #ifdef _NOT_AVAILABLE 92 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */ 93 #endif 94 95 /* Define the POSIX.1 version we target for compliance. */ 96 #define _POSIX_VERSION 200112L 97 98 /* access function */ 99 #define F_OK 0 /* test for existence of file */ 100 #define X_OK 0x01 /* test for execute or search permission */ 101 #define W_OK 0x02 /* test for write permission */ 102 #define R_OK 0x04 /* test for read permission */ 103 104 /* whence values for lseek(2) */ 105 #ifndef SEEK_SET 106 #define SEEK_SET 0 /* set file offset to offset */ 107 #define SEEK_CUR 1 /* set file offset to current plus offset */ 108 #define SEEK_END 2 /* set file offset to EOF plus offset */ 109 #endif 110 #if __BSD_VISIBLE 111 #define SEEK_DATA 3 /* set file offset to next data past offset */ 112 #define SEEK_HOLE 4 /* set file offset to next hole past offset */ 113 #endif 114 115 #ifndef _POSIX_SOURCE 116 /* whence values for lseek(2); renamed by POSIX 1003.1 */ 117 #define L_SET SEEK_SET 118 #define L_INCR SEEK_CUR 119 #define L_XTND SEEK_END 120 #endif 121 122 /* configurable pathname variables */ 123 #define _PC_LINK_MAX 1 124 #define _PC_MAX_CANON 2 125 #define _PC_MAX_INPUT 3 126 #define _PC_NAME_MAX 4 127 #define _PC_PATH_MAX 5 128 #define _PC_PIPE_BUF 6 129 #define _PC_CHOWN_RESTRICTED 7 130 #define _PC_NO_TRUNC 8 131 #define _PC_VDISABLE 9 132 133 #if __POSIX_VISIBLE >= 199309 134 #define _PC_ASYNC_IO 53 135 #define _PC_PRIO_IO 54 136 #define _PC_SYNC_IO 55 137 #endif 138 139 #if __POSIX_VISIBLE >= 200112 140 #define _PC_ALLOC_SIZE_MIN 10 141 #define _PC_FILESIZEBITS 12 142 #define _PC_REC_INCR_XFER_SIZE 14 143 #define _PC_REC_MAX_XFER_SIZE 15 144 #define _PC_REC_MIN_XFER_SIZE 16 145 #define _PC_REC_XFER_ALIGN 17 146 #define _PC_SYMLINK_MAX 18 147 #endif 148 149 #if __BSD_VISIBLE 150 #define _PC_ACL_EXTENDED 59 151 #define _PC_ACL_PATH_MAX 60 152 #define _PC_CAP_PRESENT 61 153 #define _PC_INF_PRESENT 62 154 #define _PC_MAC_PRESENT 63 155 #define _PC_ACL_NFS4 64 156 #define _PC_DEALLOC_PRESENT 65 157 #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 /* kernel: parent sleeps until child exits (vfork) */ 190 #define RFPPWAIT (1<<31) 191 /* user: vfork(2) semantics, clear signals */ 192 #define RFSPAWN (1U<<31) 193 #define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \ 194 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \ 195 RFPROCDESC | RFSPAWN | RFPPWAIT) 196 #define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPROCDESC) 197 198 /* kcmp() options. */ 199 #define KCMP_FILE 100 200 #define KCMP_FILEOBJ 101 201 #define KCMP_FILES 102 202 #define KCMP_SIGHAND 103 203 #define KCMP_VM 104 204 205 #define SWAPOFF_FORCE 0x00000001 206 207 /* 208 * close_range() options. 209 */ 210 #define CLOSE_RANGE_CLOEXEC (1<<2) 211 212 #endif /* __BSD_VISIBLE */ 213 214 #endif /* !_SYS_UNISTD_H_ */ 215