/* $NetBSD: unistd.h,v 1.66 2026/02/15 21:47:18 christos Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)unistd.h 8.2 (Berkeley) 1/7/94 */ #ifndef _SYS_UNISTD_H_ #define _SYS_UNISTD_H_ #include <sys/featuretest.h> /* compile-time symbolic constants */ #define _POSIX_JOB_CONTROL 1 /* implementation supports job control */ /* * According to POSIX 1003.1: * "The saved set-user-ID capability allows a program to regain the * effective user ID established at the last exec call." * However, the setuid/setgid function as specified by POSIX 1003.1 does * not allow changing the effective ID from the super-user without also * changed the saved ID, so it is impossible to get super-user privileges * back later. Instead we provide this feature independent of the current * effective ID through the seteuid/setegid function. In addition, we do * not use the saved ID as specified by POSIX 1003.1 in setuid/setgid, * because this would make it impossible for a set-user-ID executable * owned by a user other than the super-user to permanently revoke its * extra privileges. */ #ifdef _NOT_AVAILABLE #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */ #endif #define _POSIX_VERSION 200112L #define _POSIX2_VERSION 200112L /* * We support the posix_spawn() family of functions (unconditionally). */ #define _POSIX_SPAWN 200809L /* execution-time symbolic constants */ /* * POSIX options and option groups we unconditionally do or don't * implement. Those options which are implemented (or not) entirely * in user mode are defined in <unistd.h>. Please keep this list in * alphabetical order. * * Anything which is defined as zero below **must** have an * implementation for the corresponding sysconf() which is able to * determine conclusively whether or not the feature is supported. * Anything which is defined as other than -1 below **must** have * complete headers, types, and function declarations as specified by * the POSIX standard; however, if the relevant sysconf() function * returns -1, the functions may be stubbed out. */ /* Advisory information */ #undef _POSIX_ADVISORY_INFO /* asynchronous I/O is available */ #define _POSIX_ASYNCHRONOUS_IO 200112L /* barriers */ #define _POSIX_BARRIERS 200112L /* chown requires correct privileges */ #define _POSIX_CHOWN_RESTRICTED 1 /* clock selection */ #define _POSIX_CLOCK_SELECTION -1 /* cputime clock */ #define _POSIX_CPUTIME 200112L /* CPU type */ #undef _POSIX_CPUTYPE /* file synchronization is available */ #define _POSIX_FSYNC 1 /* support IPv6 */ #define _POSIX_IPV6 0 /* job control is available */ #define _POSIX_JOB_CONTROL 1 /* memory mapped files */ #define _POSIX_MAPPED_FILES 1 /* memory locking whole address space */ #define _POSIX_MEMLOCK 1 /* memory locking address ranges */ #define _POSIX_MEMLOCK_RANGE 1 /* memory access protections */ #define _POSIX_MEMORY_PROTECTION 1 /* message passing is available */ #define _POSIX_MESSAGE_PASSING 200112L /* monotonic clock */ #define _POSIX_MONOTONIC_CLOCK 200112L /* too-long path comp generate errors */ #define _POSIX_NO_TRUNC 1 /* prioritized I/O */ #define _POSIX_PRIORITIZED_IO -1 /* priority scheduling */ #define _POSIX_PRIORITY_SCHEDULING 200112L /* raw sockets */ #define _POSIX_RAW_SOCKETS 200112L /* read/write locks */ #define _POSIX_READER_WRITER_LOCKS 200112L /* realtime signals */ #undef _POSIX_REALTIME_SIGNALS /* regular expressions */ #define _POSIX_REGEXP 1 /* semaphores */ #define _POSIX_SEMAPHORES 200112L /* shared memory objects */ #define _POSIX_SHARED_MEMORY_OBJECTS 0 /* shell */ #define _POSIX_SHELL 1 /* spin locks */ #define _POSIX_SPIN_LOCKS 200112L /* sporadic server */ #undef _POSIX_SPORADIC_SERVER /* synchronized I/O is available */ #define _POSIX_SYNCHRONIZED_IO 1 /* threads */ #define _POSIX_THREADS 200112L /* pthread_attr for stack size */ #define _POSIX_THREAD_ATTR_STACKSIZE 200112L /* pthread_attr for stack address */ #define _POSIX_THREAD_ATTR_STACKADDR 200112L /* thread cputime clock */ #define _POSIX_THREAD_CPUTIME 200112L /* _r functions */ #define _POSIX_THREAD_PRIO_PROTECT 200112L /* PTHREAD_PRIO_PROTECT */ #define _POSIX_THREAD_SAFE_FUNCTIONS 200112L /* timeouts */ #undef _POSIX_TIMEOUTS /* timers */ #define _POSIX_TIMERS 200112L /* typed memory objects */ #undef _POSIX_TYPED_MEMORY_OBJECTS /* may disable terminal spec chars */ #define _POSIX_VDISABLE __CAST(unsigned char, '\377') /* C binding */ #define _POSIX2_C_BIND 200112L /* XPG4.2 shared memory */ #define _XOPEN_SHM 0 /* access function */ #define F_OK 0 /* test for existence of file */ #define X_OK 0x01 /* test for execute or search permission */ #define W_OK 0x02 /* test for write permission */ #define R_OK 0x04 /* test for read permission */ /* whence values for lseek(2) */ #define SEEK_SET 0 /* set file offset to offset */ #define SEEK_CUR 1 /* set file offset to current plus offset */ #define SEEK_END 2 /* set file offset to EOF plus offset */ #if defined(_NETBSD_SOURCE) /* whence values for lseek(2); renamed by POSIX 1003.1 */ #define L_SET SEEK_SET #define L_INCR SEEK_CUR #define L_XTND SEEK_END /* * fsync_range values. * * Note the following flag values were chosen to not overlap * values for SEEK_XXX flags. While not currently implemented, * it is possible to extend this call to respect SEEK_CUR and * SEEK_END offset addressing modes. */ #define FDATASYNC 0x0010 /* sync data and minimal metadata */ #define FFILESYNC 0x0020 /* sync data and metadata */ #define FDISKSYNC 0x0040 /* flush disk caches after sync */ #endif /* configurable pathname variables; use as argument to pathconf(3) */ #define _PC_LINK_MAX 1 #define _PC_MAX_CANON 2 #define _PC_MAX_INPUT 3 #define _PC_NAME_MAX 4 #define _PC_PATH_MAX 5 #define _PC_PIPE_BUF 6 #define _PC_CHOWN_RESTRICTED 7 #define _PC_NO_TRUNC 8 #define _PC_VDISABLE 9 #define _PC_SYNC_IO 10 #define _PC_FILESIZEBITS 11 #define _PC_SYMLINK_MAX 12 #define _PC_2_SYMLINKS 13 #define _PC_ACL_EXTENDED 14 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */ #define _PC_MIN_HOLE_SIZE 15 #ifdef _NETBSD_SOURCE #define _PC_ACL_PATH_MAX 16 #define _PC_ACL_NFS4 17 #endif /* configurable system variables; use as argument to sysconf(3) */ /* * XXX The value of _SC_CLK_TCK is embedded in <time.h>. * XXX The value of _SC_PAGESIZE is embedded in <sys/shm.h>. */ #define _SC_ARG_MAX 1 #define _SC_CHILD_MAX 2 #define _O_SC_CLK_TCK 3 /* Old version, always 100 */ #define _SC_NGROUPS_MAX 4 #define _SC_OPEN_MAX 5 #define _SC_JOB_CONTROL 6 #define _SC_SAVED_IDS 7 #define _SC_VERSION 8 #define _SC_BC_BASE_MAX 9 #define _SC_BC_DIM_MAX 10 #define _SC_BC_SCALE_MAX 11 #define _SC_BC_STRING_MAX 12 #define _SC_COLL_WEIGHTS_MAX 13 #define _SC_EXPR_NEST_MAX 14 #define _SC_LINE_MAX 15 #define _SC_RE_DUP_MAX 16 #define _SC_2_VERSION 17 #define _SC_2_C_BIND 18 #define _SC_2_C_DEV 19 #define _SC_2_CHAR_TERM 20 #define _SC_2_FORT_DEV 21 #define _SC_2_FORT_RUN 22 #define _SC_2_LOCALEDEF 23 #define _SC_2_SW_DEV 24 #define _SC_2_UPE 25 #define _SC_STREAM_MAX 26 #define _SC_TZNAME_MAX 27 #define _SC_PAGESIZE 28 #define _SC_PAGE_SIZE _SC_PAGESIZE /* 1170 compatibility */ #define _SC_FSYNC 29 #define _SC_XOPEN_SHM 30 #define _SC_SYNCHRONIZED_IO 31 #define _SC_IOV_MAX 32 #define _SC_MAPPED_FILES 33 #define _SC_MEMLOCK 34 #define _SC_MEMLOCK_RANGE 35 #define _SC_MEMORY_PROTECTION 36 #define _SC_LOGIN_NAME_MAX 37 #define _SC_MONOTONIC_CLOCK 38 #define _SC_CLK_TCK 39 /* New, variable version */ #define _SC_ATEXIT_MAX 40 #define _SC_THREADS 41 #define _SC_SEMAPHORES 42 #define _SC_BARRIERS 43 #define _SC_TIMERS 44 #define _SC_SPIN_LOCKS 45 #define _SC_READER_WRITER_LOCKS 46 #define _SC_GETGR_R_SIZE_MAX 47 #define _SC_GETPW_R_SIZE_MAX 48 #define _SC_CLOCK_SELECTION 49 #define _SC_ASYNCHRONOUS_IO 50 #define _SC_AIO_LISTIO_MAX 51 #define _SC_AIO_MAX 52 #define _SC_MESSAGE_PASSING 53 #define _SC_MQ_OPEN_MAX 54 #define _SC_MQ_PRIO_MAX 55 #define _SC_PRIORITY_SCHEDULING 56 #define _SC_THREAD_DESTRUCTOR_ITERATIONS 57 #define _SC_THREAD_KEYS_MAX 58 #define _SC_THREAD_STACK_MIN 59 #define _SC_THREAD_THREADS_MAX 60 #define _SC_THREAD_ATTR_STACKADDR 61 #define _SC_THREAD_ATTR_STACKSIZE 62 #define _SC_THREAD_PRIORITY_SCHEDULING 63 #define _SC_THREAD_PRIO_INHERIT 64 #define _SC_THREAD_PRIO_PROTECT 65 #define _SC_THREAD_PROCESS_SHARED 66 #define _SC_THREAD_SAFE_FUNCTIONS 67 #define _SC_TTY_NAME_MAX 68 #define _SC_HOST_NAME_MAX 69 #define _SC_PASS_MAX 70 #define _SC_REGEXP 71 #define _SC_SHELL 72 #define _SC_SYMLOOP_MAX 73 /* Actually, they are not supported or implemented yet */ #define _SC_V6_ILP32_OFF32 74 #define _SC_V6_ILP32_OFFBIG 75 #define _SC_V6_LP64_OFF64 76 #define _SC_V6_LPBIG_OFFBIG 77 #define _SC_2_PBS 80 #define _SC_2_PBS_ACCOUNTING 81 #define _SC_2_PBS_CHECKPOINT 82 #define _SC_2_PBS_LOCATE 83 #define _SC_2_PBS_MESSAGE 84 #define _SC_2_PBS_TRACK 85 /* These are implemented */ #define _SC_SPAWN 86 #define _SC_SHARED_MEMORY_OBJECTS 87 #define _SC_TIMER_MAX 88 #define _SC_SEM_NSEMS_MAX 89 #define _SC_CPUTIME 90 #define _SC_THREAD_CPUTIME 91 #define _SC_DELAYTIMER_MAX 92 #define _SC_SIGQUEUE_MAX 93 #define _SC_REALTIME_SIGNALS 94 #define _SC_RTSIG_MAX 95 /* Extensions found in Solaris and Linux. */ #define _SC_PHYS_PAGES 121 #define _SC_AVPHYS_PAGES 122 #ifdef _NETBSD_SOURCE /* Commonly provided sysconf() extensions */ #define _SC_NPROCESSORS_CONF 1001 #define _SC_NPROCESSORS_ONLN 1002 /* Native variables */ #define _SC_SCHED_RT_TS 2001 #define _SC_SCHED_PRI_MIN 2002 #define _SC_SCHED_PRI_MAX 2003 #endif /* _NETBSD_SOURCE */ /* configurable system strings */ #define _CS_PATH 1 #endif /* !_SYS_UNISTD_H_ */
