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 * 3. 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: src/sys/sys/unistd.h,v 1.50 2009/01/31 10:04:36 trhodes Exp $ 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 -1 /* [ADV] */ 53 #define _POSIX_ASYNCHRONOUS_IO 0 /* mandatory ([AIO]) */ 54 #define _POSIX_BARRIERS 200112L /* mandatory ([BAR]) */ 55 #define _POSIX_CHOWN_RESTRICTED 1 56 #define _POSIX_CLOCK_SELECTION -1 /* XXX mandatory ([CS]) */ 57 #define _POSIX_CPUTIME 200112L /* [CPT] */ 58 #define _POSIX_FSYNC 200112L /* [FSC] */ 59 #define _POSIX_IPV6 0 60 #define _POSIX_JOB_CONTROL 1 /* mandatory */ 61 #define _POSIX_MAPPED_FILES 200112L /* mandatory ([MF]) */ 62 #define _POSIX_MEMLOCK -1 /* [ML] */ 63 #define _POSIX_MEMLOCK_RANGE 200112L /* [MLR] */ 64 #define _POSIX_MEMORY_PROTECTION 200112L /* mandatory ([MPR]) */ 65 #define _POSIX_MESSAGE_PASSING 200112L /* [MSG] */ 66 #define _POSIX_MONOTONIC_CLOCK 200112L /* [MON] */ 67 #define _POSIX_NO_TRUNC 1 68 #define _POSIX_PRIORITIZED_IO -1 /* [PIO] */ 69 #define _POSIX_PRIORITY_SCHEDULING 200112L /* [PS] */ 70 #define _POSIX_RAW_SOCKETS 200112L /* [RS] */ 71 #define _POSIX_REALTIME_SIGNALS 200112L /* mandatory ([RTS]) */ 72 #define _POSIX_SEMAPHORES 200112L /* mandatory ([SEM]) */ 73 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L /* [SHM] */ 74 #define _POSIX_SPIN_LOCKS 200112L /* mandatory ([SPI]) */ 75 #define _POSIX_SPORADIC_SERVER -1 /* [SS] */ 76 #define _POSIX_SYNCHRONIZED_IO -1 /* [SIO] */ 77 #define _POSIX_THREAD_CPUTIME 200112L /* [TCT] */ 78 #define _POSIX_TIMEOUTS 200112L /* mandatory ([TMO]) */ 79 #define _POSIX_TIMERS 200112L /* XXX mandatory ([TMR]) */ 80 #define _POSIX_TYPED_MEMORY_OBJECTS -1 /* [TYM] */ 81 #define _POSIX_VDISABLE 0xff 82 83 #if __XSI_VISIBLE 84 #define _XOPEN_SHM 1 85 #define _XOPEN_STREAMS -1 /* [XSR] obsolescent */ 86 #endif 87 88 /* 89 * Although we have saved user/group IDs, we do not use them in setuid 90 * as described in POSIX 1003.1, because the feature does not work for 91 * root. We use the saved IDs in seteuid/setegid, which are not currently 92 * part of the POSIX 1003.1 specification. See comments in kern_prot.c. 93 * 94 * XXX revisit for 1003.1-2008 as this is now mandatory since 1003.1-2001. 95 */ 96 #if 0 97 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */ 98 #endif 99 100 /* Define the POSIX.1 version we target for compliance. */ 101 #ifndef _POSIX_VERSION 102 #define _POSIX_VERSION 200112L 103 #endif 104 105 /* access function */ 106 #define F_OK 0 /* test for existence of file */ 107 #define X_OK 0x01 /* test for execute or search permission */ 108 #define W_OK 0x02 /* test for write permission */ 109 #define R_OK 0x04 /* test for read permission */ 110 111 /* 112 * whence values for lseek(2) 113 * Always ensure that these are consistent with <fcntl.h> and <stdio.h>! 114 */ 115 #ifndef SEEK_SET 116 #define SEEK_SET 0 /* set file offset to offset */ 117 #endif 118 #ifndef SEEK_CUR 119 #define SEEK_CUR 1 /* set file offset to current plus offset */ 120 #endif 121 #ifndef SEEK_END 122 #define SEEK_END 2 /* set file offset to EOF plus offset */ 123 #endif 124 #if __BSD_VISIBLE 125 #define SEEK_DATA 3 /* set file offset to next data past offset */ 126 #define SEEK_HOLE 4 /* set file offset to next hole past offset */ 127 128 /* whence values for lseek(2); renamed by POSIX 1003.1 */ 129 #define L_SET SEEK_SET 130 #define L_INCR SEEK_CUR 131 #define L_XTND SEEK_END 132 #endif 133 134 /* configurable pathname variables */ 135 #define _PC_LINK_MAX 1 136 #define _PC_MAX_CANON 2 137 #define _PC_MAX_INPUT 3 138 #define _PC_NAME_MAX 4 139 #define _PC_PATH_MAX 5 140 #define _PC_PIPE_BUF 6 141 #define _PC_CHOWN_RESTRICTED 7 142 #define _PC_NO_TRUNC 8 143 #define _PC_VDISABLE 9 144 145 #if __POSIX_VISIBLE >= 199309 146 #define _PC_ASYNC_IO 53 147 #define _PC_PRIO_IO 54 148 #define _PC_SYNC_IO 55 149 #endif 150 151 #if __POSIX_VISIBLE >= 200112 152 #define _PC_ALLOC_SIZE_MIN 10 153 #define _PC_FILESIZEBITS 12 154 #define _PC_REC_INCR_XFER_SIZE 14 155 #define _PC_REC_MAX_XFER_SIZE 15 156 #define _PC_REC_MIN_XFER_SIZE 16 157 #define _PC_REC_XFER_ALIGN 17 158 #define _PC_SYMLINK_MAX 18 159 #endif 160 161 #if __POSIX_VISIBLE >= 200809 162 #define _PC_2_SYMLINKS 22 163 #define _PC_TIMESTAMP_RESOLUTION 23 164 #endif 165 166 #if __BSD_VISIBLE 167 #define _PC_ACL_EXTENDED 59 168 #define _PC_ACL_PATH_MAX 60 169 #define _PC_CAP_PRESENT 61 170 #define _PC_INF_PRESENT 62 171 #define _PC_MAC_PRESENT 63 172 #endif 173 174 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */ 175 #define _PC_MIN_HOLE_SIZE 21 176 177 #if __BSD_VISIBLE 178 /* 179 * rfork() options. 180 * 181 * XXX currently, operations without RFPROC set are not supported. 182 */ 183 #define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */ 184 #define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */ 185 #define RFFDG (1<<2) /* copy fd table */ 186 #define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */ 187 #define RFPROC (1<<4) /* change child (else changes curproc) */ 188 #define RFMEM (1<<5) /* share `address space' */ 189 #define RFNOWAIT (1<<6) /* parent need not wait() on child */ 190 #define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */ 191 #define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */ 192 #define RFCFDG (1<<12) /* zero fd table */ 193 #define RFTHREAD (1<<13) /* enable kernel thread support */ 194 #define RFSIGSHARE (1<<14) /* share signal handlers */ 195 #define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */ 196 #define RFPGLOCK (1<<30) /* process group interlock for signal race */ 197 #define RFPPWAIT (1<<31) /* parent sleeps until child exits (vfork) */ 198 #define RFKERNELONLY (RFPGLOCK | RFPPWAIT) 199 200 /* 201 * Extended exit extexit() operation modes. 202 */ 203 /* Types of action to communicate exit */ 204 #define EXTEXIT_SIMPLE 0 205 #define EXTEXIT_SETINT 1 206 #define EXTEXIT_ACTION(f) ((f) & 0xffff) 207 /* Types describing what to exit */ 208 #define EXTEXIT_PROC (0<<16) 209 #define EXTEXIT_LWP (1<<16) 210 #define EXTEXIT_WHO(f) ((f) & (0xffff<<16)) 211 212 #endif /* __BSD_VISIBLE */ 213 214 #endif /* !_SYS_UNISTD_H_ */ 215