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Diffstat (limited to 'man/man7/posixoptions.7')
| -rw-r--r-- | man/man7/posixoptions.7 | 1014 |
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diff --git a/man/man7/posixoptions.7 b/man/man7/posixoptions.7 new file mode 100644 index 0000000..e9de31f --- /dev/null +++ b/man/man7/posixoptions.7 @@ -0,0 +1,1014 @@ +.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl) +.\" +.\" SPDX-License-Identifier: GPL-2.0-or-later +.\" +.TH posixoptions 7 2024-05-02 "Linux man-pages (unreleased)" +.SH NAME +posixoptions \- optional parts of the POSIX standard +.SH DESCRIPTION +The POSIX standard (the information below is from POSIX.1-2001) +describes a set of behaviors and interfaces for a compliant system. +However, many interfaces are optional and there are feature test macros +to test the availability of interfaces at compile time, and functions +.BR sysconf (3), +.BR fpathconf (3), +.BR pathconf (3), +.BR confstr (3) +to do this at run time. +From shell scripts one can use +.BR getconf (1). +For more detail, see +.BR sysconf (3). +.P +We give the name of the POSIX abbreviation, the option, the name of the +.BR sysconf (3) +parameter used to inquire about the option, and possibly +a very short description. +Much more precise detail can be found in the POSIX standard itself, +versions of which can nowadays be accessed freely on the web. +.SS ADV - _POSIX_ADVISORY_INFO - _SC_ADVISORY_INFO +The following advisory functions are present: +.P +.nf +.in +4n +.IR posix_fadvise () +.IR posix_fallocate () +.IR posix_memalign () +.IR posix_madvise () +.in +.fi +.SS AIO - _POSIX_ASYNCHRONOUS_IO - _SC_ASYNCHRONOUS_IO +The header +.I <aio.h> +is present. +The following functions are present: +.P +.nf +.in +4n +.IR aio_cancel () +.IR aio_error () +.IR aio_fsync () +.IR aio_read () +.IR aio_return () +.IR aio_suspend () +.IR aio_write () +.IR lio_listio () +.in +.fi +.SS BAR - _POSIX_BARRIERS - _SC_BARRIERS +This option implies the +.B _POSIX_THREADS +and +.B _POSIX_THREAD_SAFE_FUNCTIONS +options. +The following functions are present: +.P +.nf +.in +4n +.IR pthread_barrier_destroy () +.IR pthread_barrier_init () +.IR pthread_barrier_wait () +.IR pthread_barrierattr_destroy () +.IR pthread_barrierattr_init () +.in +.fi +.\" .SS BE +.\" Batch environment. +.\" .SS CD +.\" C development. +.SS --- - POSIX_CHOWN_RESTRICTED +If this option is in effect (as it always is under POSIX.1-2001), +then only root may change the owner of a file, and nonroot can +set the group of a file only to one of the groups it belongs to. +This affects the following functions: +.P +.nf +.in +4n +.IR chown () +.IR fchown () +.in +.fi +.\" What about lchown() ? +.SS CS - _POSIX_CLOCK_SELECTION - _SC_CLOCK_SELECTION +This option implies the +.B _POSIX_TIMERS +option. +The following functions are present: +.P +.nf +.in +4n +.IR pthread_condattr_getclock () +.IR pthread_condattr_setclock () +.IR clock_nanosleep () +.in +.fi +.P +If +.B CLOCK_REALTIME +is changed by the function +.IR clock_settime (), +then this affects all timers set for an absolute time. +.SS CPT - _POSIX_CPUTIME - _SC_CPUTIME +The +.B CLOCK_PROCESS_CPUTIME_ID +clock ID is supported. +The initial value of this clock is 0 for each process. +This option implies the +.B _POSIX_TIMERS +option. +The function +.IR clock_getcpuclockid () +is present. +.\" .SS FD +.\" Fortran development +.\" .SS FR +.\" Fortran runtime +.SS --- - _POSIX_FILE_LOCKING - _SC_FILE_LOCKING +This option has been deleted. +Not in final XPG6. +.SS FSC - _POSIX_FSYNC - _SC_FSYNC +The function +.IR fsync () +is present. +.SS IP6 - _POSIX_IPV6 - _SC_IPV6 +Internet Protocol Version 6 is supported. +.SS --- - _POSIX_JOB_CONTROL - _SC_JOB_CONTROL +If this option is in effect (as it always is under POSIX.1-2001), +then the system implements POSIX-style job control, +and the following functions are present: +.P +.nf +.in +4n +.IR setpgid () +.IR tcdrain () +.IR tcflush () +.IR tcgetpgrp () +.IR tcsendbreak () +.IR tcsetattr () +.IR tcsetpgrp () +.in +.fi +.SS MF - _POSIX_MAPPED_FILES - _SC_MAPPED_FILES +Shared memory is supported. +The include file +.I <sys/mman.h> +is present. +The following functions are present: +.P +.nf +.in +4n +.IR mmap () +.IR msync () +.IR munmap () +.in +.fi +.SS ML - _POSIX_MEMLOCK - _SC_MEMLOCK +Shared memory can be locked into core. +The following functions are present: +.P +.nf +.in +4n +.IR mlockall () +.IR munlockall () +.in +.fi +.SS MR/MLR - _POSIX_MEMLOCK_RANGE - _SC_MEMLOCK_RANGE +More precisely, ranges can be locked into core. +The following functions are present: +.P +.nf +.in +4n +.IR mlock () +.IR munlock () +.in +.fi +.SS MPR - _POSIX_MEMORY_PROTECTION - _SC_MEMORY_PROTECTION +The function +.IR mprotect () +is present. +.SS MSG - _POSIX_MESSAGE_PASSING - _SC_MESSAGE_PASSING +The include file +.I <mqueue.h> +is present. +The following functions are present: +.P +.nf +.in +4n +.IR mq_close () +.IR mq_getattr () +.IR mq_notify () +.IR mq_open () +.IR mq_receive () +.IR mq_send () +.IR mq_setattr () +.IR mq_unlink () +.in +.fi +.SS MON - _POSIX_MONOTONIC_CLOCK - _SC_MONOTONIC_CLOCK +.B CLOCK_MONOTONIC +is supported. +This option implies the +.B _POSIX_TIMERS +option. +The following functions are affected: +.P +.nf +.in +4n +.IR aio_suspend () +.IR clock_getres () +.IR clock_gettime () +.IR clock_settime () +.IR timer_create () +.in +.fi +.SS --- - _POSIX_MULTI_PROCESS - _SC_MULTI_PROCESS +This option has been deleted. +Not in final XPG6. +.\" .SS MX +.\" IEC 60559 Floating-Point Option. +.SS --- - _POSIX_NO_TRUNC +If this option is in effect (as it always is under POSIX.1-2001), +then pathname components longer than +.B NAME_MAX +are not truncated, +but give an error. +This property may be dependent on the path prefix of the component. +.SS PIO - _POSIX_PRIORITIZED_IO - _SC_PRIORITIZED_IO +This option says that one can specify priorities for asynchronous I/O. +This affects the functions +.P +.nf +.in +4n +.IR aio_read () +.IR aio_write () +.in +.fi +.SS PS - _POSIX_PRIORITY_SCHEDULING - _SC_PRIORITY_SCHEDULING +The include file +.I <sched.h> +is present. +The following functions are present: +.P +.nf +.in +4n +.IR sched_get_priority_max () +.IR sched_get_priority_min () +.IR sched_getparam () +.IR sched_getscheduler () +.IR sched_rr_get_interval () +.IR sched_setparam () +.IR sched_setscheduler () +.IR sched_yield () +.in +.fi +.P +If also +.B _POSIX_SPAWN +is in effect, then the following functions are present: +.P +.nf +.in +4n +.IR posix_spawnattr_getschedparam () +.IR posix_spawnattr_getschedpolicy () +.IR posix_spawnattr_setschedparam () +.IR posix_spawnattr_setschedpolicy () +.in +.fi +.SS RS - _POSIX_RAW_SOCKETS +Raw sockets are supported. +The following functions are affected: +.P +.nf +.in +4n +.IR getsockopt () +.IR setsockopt () +.in +.fi +.SS --- - _POSIX_READER_WRITER_LOCKS - _SC_READER_WRITER_LOCKS +This option implies the +.B _POSIX_THREADS +option. +Conversely, +under POSIX.1-2001 the +.B _POSIX_THREADS +option implies this option. +.P +The following functions are present: +.P +.in +4n +.nf +.IR pthread_rwlock_destroy () +.IR pthread_rwlock_init () +.IR pthread_rwlock_rdlock () +.IR pthread_rwlock_tryrdlock () +.IR pthread_rwlock_trywrlock () +.IR pthread_rwlock_unlock () +.IR pthread_rwlock_wrlock () +.IR pthread_rwlockattr_destroy () +.IR pthread_rwlockattr_init () +.in +.fi +.SS RTS - _POSIX_REALTIME_SIGNALS - _SC_REALTIME_SIGNALS +Realtime signals are supported. +The following functions are present: +.P +.nf +.in +4n +.IR sigqueue () +.IR sigtimedwait () +.IR sigwaitinfo () +.in +.fi +.SS --- - _POSIX_REGEXP - _SC_REGEXP +If this option is in effect (as it always is under POSIX.1-2001), +then POSIX regular expressions are supported +and the following functions are present: +.P +.nf +.in +4n +.IR regcomp () +.IR regerror () +.IR regexec () +.IR regfree () +.in +.fi +.SS --- - _POSIX_SAVED_IDS - _SC_SAVED_IDS +If this option is in effect (as it always is under POSIX.1-2001), +then a process has a saved set-user-ID and a saved set-group-ID. +The following functions are affected: +.P +.nf +.in +4n +.IR exec () +.IR kill () +.IR seteuid () +.IR setegid () +.IR setgid () +.IR setuid () +.in +.fi +.\" .SS SD +.\" Software development +.SS SEM - _POSIX_SEMAPHORES - _SC_SEMAPHORES +The include file +.I <semaphore.h> +is present. +The following functions are present: +.P +.nf +.in +4n +.IR sem_close () +.IR sem_destroy () +.IR sem_getvalue () +.IR sem_init () +.IR sem_open () +.IR sem_post () +.IR sem_trywait () +.IR sem_unlink () +.IR sem_wait () +.in +.fi +.SS SHM - _POSIX_SHARED_MEMORY_OBJECTS - _SC_SHARED_MEMORY_OBJECTS +The following functions are present: +.P +.nf +.in +4n +.IR mmap () +.IR munmap () +.IR shm_open () +.IR shm_unlink () +.in +.fi +.SS --- - _POSIX_SHELL - _SC_SHELL +If this option is in effect (as it always is under POSIX.1-2001), +the function +.IR system () +is present. +.SS SPN - _POSIX_SPAWN - _SC_SPAWN +This option describes support for process creation in a context where +it is difficult or impossible to use +.IR fork (), +for example, because no MMU is present. +.P +If +.B _POSIX_SPAWN +is in effect, then the include file +.I <spawn.h> +and the following functions are present: +.P +.nf +.in +4n +.IR posix_spawn () +.IR posix_spawn_file_actions_addclose () +.IR posix_spawn_file_actions_adddup2 () +.IR posix_spawn_file_actions_addopen () +.IR posix_spawn_file_actions_destroy () +.IR posix_spawn_file_actions_init () +.IR posix_spawnattr_destroy () +.IR posix_spawnattr_getsigdefault () +.IR posix_spawnattr_getflags () +.IR posix_spawnattr_getpgroup () +.IR posix_spawnattr_getsigmask () +.IR posix_spawnattr_init () +.IR posix_spawnattr_setsigdefault () +.IR posix_spawnattr_setflags () +.IR posix_spawnattr_setpgroup () +.IR posix_spawnattr_setsigmask () +.IR posix_spawnp () +.in +.fi +.P +If also +.B _POSIX_PRIORITY_SCHEDULING +is in effect, then +the following functions are present: +.P +.nf +.in +4n +.IR posix_spawnattr_getschedparam () +.IR posix_spawnattr_getschedpolicy () +.IR posix_spawnattr_setschedparam () +.IR posix_spawnattr_setschedpolicy () +.in +.fi +.SS SPI - _POSIX_SPIN_LOCKS - _SC_SPIN_LOCKS +This option implies the +.B _POSIX_THREADS +and +.B _POSIX_THREAD_SAFE_FUNCTIONS +options. +The following functions are present: +.P +.nf +.in +4n +.IR pthread_spin_destroy () +.IR pthread_spin_init () +.IR pthread_spin_lock () +.IR pthread_spin_trylock () +.IR pthread_spin_unlock () +.in -4n +.fi +.SS SS - _POSIX_SPORADIC_SERVER - _SC_SPORADIC_SERVER +The scheduling policy +.B SCHED_SPORADIC +is supported. +This option implies the +.B _POSIX_PRIORITY_SCHEDULING +option. +The following functions are affected: +.P +.nf +.in +4n +.IR sched_setparam () +.IR sched_setscheduler () +.in +.fi +.SS SIO - _POSIX_SYNCHRONIZED_IO - _SC_SYNCHRONIZED_IO +The following functions are affected: +.P +.nf +.in +4n +.IR open () +.IR msync () +.IR fsync () +.IR fdatasync () +.in +.fi +.SS TSA - _POSIX_THREAD_ATTR_STACKADDR - _SC_THREAD_ATTR_STACKADDR +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_attr_getstack () +.IR pthread_attr_getstackaddr () +.IR pthread_attr_setstack () +.IR pthread_attr_setstackaddr () +.in +.fi +.SS TSS - _POSIX_THREAD_ATTR_STACKSIZE - _SC_THREAD_ATTR_STACKSIZE +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_attr_getstack () +.IR pthread_attr_getstacksize () +.IR pthread_attr_setstack () +.IR pthread_attr_setstacksize () +.in +.fi +.SS TCT - _POSIX_THREAD_CPUTIME - _SC_THREAD_CPUTIME +The clockID CLOCK_THREAD_CPUTIME_ID is supported. +This option implies the +.B _POSIX_TIMERS +option. +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_getcpuclockid () +.IR clock_getres () +.IR clock_gettime () +.IR clock_settime () +.IR timer_create () +.in +.fi +.SS TPI - _POSIX_THREAD_PRIO_INHERIT - _SC_THREAD_PRIO_INHERIT +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_mutexattr_getprotocol () +.IR pthread_mutexattr_setprotocol () +.in +.fi +.SS TPP - _POSIX_THREAD_PRIO_PROTECT - _SC_THREAD_PRIO_PROTECT +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_mutex_getprioceiling () +.IR pthread_mutex_setprioceiling () +.IR pthread_mutexattr_getprioceiling () +.IR pthread_mutexattr_getprotocol () +.IR pthread_mutexattr_setprioceiling () +.IR pthread_mutexattr_setprotocol () +.in +.fi +.SS TPS - _POSIX_THREAD_PRIORITY_SCHEDULING - _SC_THREAD_PRIORITY_SCHEDULING +If this option is in effect, the different threads inside a process +can run with different priorities and/or different schedulers. +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_attr_getinheritsched () +.IR pthread_attr_getschedpolicy () +.IR pthread_attr_getscope () +.IR pthread_attr_setinheritsched () +.IR pthread_attr_setschedpolicy () +.IR pthread_attr_setscope () +.IR pthread_getschedparam () +.IR pthread_setschedparam () +.IR pthread_setschedprio () +.in +.fi +.SS TSH - _POSIX_THREAD_PROCESS_SHARED - _SC_THREAD_PROCESS_SHARED +The following functions are affected: +.P +.nf +.in +4n +.IR pthread_barrierattr_getpshared () +.IR pthread_barrierattr_setpshared () +.IR pthread_condattr_getpshared () +.IR pthread_condattr_setpshared () +.IR pthread_mutexattr_getpshared () +.IR pthread_mutexattr_setpshared () +.IR pthread_rwlockattr_getpshared () +.IR pthread_rwlockattr_setpshared () +.in +.fi +.SS TSF - _POSIX_THREAD_SAFE_FUNCTIONS - _SC_THREAD_SAFE_FUNCTIONS +The following functions are affected: +.P +.nf +.in +4n +.IR readdir_r () +.IR getgrgid_r () +.IR getgrnam_r () +.IR getpwnam_r () +.IR getpwuid_r () +.IR flockfile () +.IR ftrylockfile () +.IR funlockfile () +.IR getc_unlocked () +.IR getchar_unlocked () +.IR putc_unlocked () +.IR putchar_unlocked () +.IR rand_r () +.IR strerror_r () +.IR strtok_r () +.IR asctime_r () +.IR ctime_r () +.IR gmtime_r () +.IR localtime_r () +.in +.fi +.SS TSP - _POSIX_THREAD_SPORADIC_SERVER - _SC_THREAD_SPORADIC_SERVER +This option implies the +.B _POSIX_THREAD_PRIORITY_SCHEDULING +option. +The following functions are affected: +.P +.nf +.in +4n +.IR sched_getparam () +.IR sched_setparam () +.IR sched_setscheduler () +.in +.fi +.SS THR - _POSIX_THREADS - _SC_THREADS +Basic support for POSIX threads is available. +The following functions are present: +.P +.nf +.in +4n +.IR pthread_atfork () +.IR pthread_attr_destroy () +.IR pthread_attr_getdetachstate () +.IR pthread_attr_getschedparam () +.IR pthread_attr_init () +.IR pthread_attr_setdetachstate () +.IR pthread_attr_setschedparam () +.IR pthread_cancel () +.IR pthread_cleanup_push () +.IR pthread_cleanup_pop () +.IR pthread_cond_broadcast () +.IR pthread_cond_destroy () +.IR pthread_cond_init () +.IR pthread_cond_signal () +.IR pthread_cond_timedwait () +.IR pthread_cond_wait () +.IR pthread_condattr_destroy () +.IR pthread_condattr_init () +.IR pthread_create () +.IR pthread_detach () +.IR pthread_equal () +.IR pthread_exit () +.IR pthread_getspecific () +.IR pthread_join () +.IR pthread_key_create () +.IR pthread_key_delete () +.IR pthread_mutex_destroy () +.IR pthread_mutex_init () +.IR pthread_mutex_lock () +.IR pthread_mutex_trylock () +.IR pthread_mutex_unlock () +.IR pthread_mutexattr_destroy () +.IR pthread_mutexattr_init () +.IR pthread_once () +.IR pthread_rwlock_destroy () +.IR pthread_rwlock_init () +.IR pthread_rwlock_rdlock () +.IR pthread_rwlock_tryrdlock () +.IR pthread_rwlock_trywrlock () +.IR pthread_rwlock_unlock () +.IR pthread_rwlock_wrlock () +.IR pthread_rwlockattr_destroy () +.IR pthread_rwlockattr_init () +.IR pthread_self () +.IR pthread_setcancelstate () +.IR pthread_setcanceltype () +.IR pthread_setspecific () +.IR pthread_testcancel () +.in +.fi +.SS TMO - _POSIX_TIMEOUTS - _SC_TIMEOUTS +The following functions are present: +.P +.nf +.in +4n +.IR mq_timedreceive () +.IR mq_timedsend () +.IR pthread_mutex_timedlock () +.IR pthread_rwlock_timedrdlock () +.IR pthread_rwlock_timedwrlock () +.IR sem_timedwait () +.IR posix_trace_timedgetnext_event () +.in +.fi +.SS TMR - _POSIX_TIMERS - _SC_TIMERS +The following functions are present: +.P +.nf +.in +4n +.IR clock_getres () +.IR clock_gettime () +.IR clock_settime () +.IR nanosleep () +.IR timer_create () +.IR timer_delete () +.IR timer_gettime () +.IR timer_getoverrun () +.IR timer_settime () +.in +.fi +.SS TRC - _POSIX_TRACE - _SC_TRACE +POSIX tracing is available. +The following functions are present: +.P +.nf +.in +4n +.IR posix_trace_attr_destroy () +.IR posix_trace_attr_getclockres () +.IR posix_trace_attr_getcreatetime () +.IR posix_trace_attr_getgenversion () +.IR posix_trace_attr_getmaxdatasize () +.IR posix_trace_attr_getmaxsystemeventsize () +.IR posix_trace_attr_getmaxusereventsize () +.IR posix_trace_attr_getname () +.IR posix_trace_attr_getstreamfullpolicy () +.IR posix_trace_attr_getstreamsize () +.IR posix_trace_attr_init () +.IR posix_trace_attr_setmaxdatasize () +.IR posix_trace_attr_setname () +.IR posix_trace_attr_setstreamsize () +.IR posix_trace_attr_setstreamfullpolicy () +.IR posix_trace_clear () +.IR posix_trace_create () +.IR posix_trace_event () +.IR posix_trace_eventid_equal () +.IR posix_trace_eventid_get_name () +.IR posix_trace_eventid_open () +.IR posix_trace_eventtypelist_getnext_id () +.IR posix_trace_eventtypelist_rewind () +.IR posix_trace_flush () +.IR posix_trace_get_attr () +.IR posix_trace_get_status () +.IR posix_trace_getnext_event () +.IR posix_trace_shutdown () +.IR posix_trace_start () +.IR posix_trace_stop () +.IR posix_trace_trygetnext_event () +.in +.fi +.SS TEF - _POSIX_TRACE_EVENT_FILTER - _SC_TRACE_EVENT_FILTER +This option implies the +.B _POSIX_TRACE +option. +The following functions are present: +.P +.nf +.in +4n +.IR posix_trace_eventset_add () +.IR posix_trace_eventset_del () +.IR posix_trace_eventset_empty () +.IR posix_trace_eventset_fill () +.IR posix_trace_eventset_ismember () +.IR posix_trace_get_filter () +.IR posix_trace_set_filter () +.IR posix_trace_trid_eventid_open () +.in +.fi +.SS TRI - _POSIX_TRACE_INHERIT - _SC_TRACE_INHERIT +Tracing children of the traced process is supported. +This option implies the +.B _POSIX_TRACE +option. +The following functions are present: +.P +.nf +.in +4n +.IR posix_trace_attr_getinherited () +.IR posix_trace_attr_setinherited () +.in +.fi +.SS TRL - _POSIX_TRACE_LOG - _SC_TRACE_LOG +This option implies the +.B _POSIX_TRACE +option. +The following functions are present: +.P +.nf +.in +4n +.IR posix_trace_attr_getlogfullpolicy () +.IR posix_trace_attr_getlogsize () +.IR posix_trace_attr_setlogfullpolicy () +.IR posix_trace_attr_setlogsize () +.IR posix_trace_close () +.IR posix_trace_create_withlog () +.IR posix_trace_open () +.IR posix_trace_rewind () +.in +.fi +.SS TYM - _POSIX_TYPED_MEMORY_OBJECTS - _SC_TYPED_MEMORY_OBJECT +The following functions are present: +.P +.nf +.in +4n +.IR posix_mem_offset () +.IR posix_typed_mem_get_info () +.IR posix_typed_mem_open () +.in +.fi +.SS --- - _POSIX_VDISABLE +Always present (probably 0). +Value to set a changeable special control +character to indicate that it is disabled. +.SH X/OPEN SYSTEM INTERFACE EXTENSIONS +.SS XSI - _XOPEN_CRYPT - _SC_XOPEN_CRYPT +The following functions are present: +.P +.nf +.in +4n +.IR crypt () +.IR encrypt () +.IR setkey () +.fi +.SS XSI - _XOPEN_REALTIME - _SC_XOPEN_REALTIME +This option implies the following options: +.P +.PD 0 +.TP +.BR _POSIX_ASYNCHRONOUS_IO == 200112L +.TP +.B _POSIX_FSYNC +.TP +.B _POSIX_MAPPED_FILES +.TP +.BR _POSIX_MEMLOCK == 200112L +.TP +.BR _POSIX_MEMLOCK_RANGE == 200112L +.TP +.B _POSIX_MEMORY_PROTECTION +.TP +.BR _POSIX_MESSAGE_PASSING == 200112L +.TP +.B _POSIX_PRIORITIZED_IO +.TP +.BR _POSIX_PRIORITY_SCHEDULING == 200112L +.TP +.BR _POSIX_REALTIME_SIGNALS == 200112L +.TP +.BR _POSIX_SEMAPHORES == 200112L +.TP +.BR _POSIX_SHARED_MEMORY_OBJECTS == 200112L +.TP +.BR _POSIX_SYNCHRONIZED_IO == 200112L +.TP +.BR _POSIX_TIMERS == 200112L +.PD +.\" +.SS ADV - --- - --- +The Advanced Realtime option group implies that the following options +are all defined to 200112L: +.P +.PD 0 +.TP +.B _POSIX_ADVISORY_INFO +.TP +.B _POSIX_CLOCK_SELECTION +(implies +.BR _POSIX_TIMERS ) +.TP +.B _POSIX_CPUTIME +(implies +.BR _POSIX_TIMERS ) +.TP +.B _POSIX_MONOTONIC_CLOCK +(implies +.BR _POSIX_TIMERS ) +.TP +.B _POSIX_SPAWN +.TP +.B _POSIX_SPORADIC_SERVER +(implies +.BR _POSIX_PRIORITY_SCHEDULING ) +.TP +.B _POSIX_TIMEOUTS +.TP +.B _POSIX_TYPED_MEMORY_OBJECTS +.PD +.\" +.SS XSI - _XOPEN_REALTIME_THREADS - _SC_XOPEN_REALTIME_THREADS +This option implies that the following options +are all defined to 200112L: +.P +.PD 0 +.TP +.B _POSIX_THREAD_PRIO_INHERIT +.TP +.B _POSIX_THREAD_PRIO_PROTECT +.TP +.B _POSIX_THREAD_PRIORITY_SCHEDULING +.PD +.SS ADVANCED REALTIME THREADS - --- - --- +This option implies that the following options +are all defined to 200112L: +.P +.PD 0 +.TP +.B _POSIX_BARRIERS +(implies +.BR _POSIX_THREADS , +.BR _POSIX_THREAD_SAFE_FUNCTIONS ) +.TP +.B _POSIX_SPIN_LOCKS +(implies +.BR _POSIX_THREADS , +.BR _POSIX_THREAD_SAFE_FUNCTIONS ) +.TP +.B _POSIX_THREAD_CPUTIME +(implies +.BR _POSIX_TIMERS ) +.TP +.B _POSIX_THREAD_SPORADIC_SERVER +(implies +.BR _POSIX_THREAD_PRIORITY_SCHEDULING ) +.PD +.\" +.SS TRACING - --- - --- +This option implies that the following options +are all defined to 200112L: +.P +.PD 0 +.TP +.B _POSIX_TRACE +.TP +.B _POSIX_TRACE_EVENT_FILTER +.TP +.B _POSIX_TRACE_LOG +.TP +.B _POSIX_TRACE_INHERIT +.PD +.SS STREAMS - _XOPEN_STREAMS - _SC_XOPEN_STREAMS +The following functions are present: +.P +.nf +.in +4n +.IR fattach () +.IR fdetach () +.IR getmsg () +.IR getpmsg () +.IR ioctl () +.IR isastream () +.IR putmsg () +.IR putpmsg () +.in +.fi +.SS XSI - _XOPEN_LEGACY - _SC_XOPEN_LEGACY +Functions included in the legacy option group were previously mandatory, +but are now optional in this version. +The following functions are present: +.P +.nf +.in +4n +.IR bcmp () +.IR bcopy () +.IR bzero () +.IR ecvt () +.IR fcvt () +.IR ftime () +.IR gcvt () +.IR getwd () +.IR index () +.IR mktemp () +.IR rindex () +.IR utimes () +.IR wcswcs () +.in +.fi +.SS XSI - _XOPEN_UNIX - _SC_XOPEN_UNIX +The following functions are present: +.P +.nf +.in +4n +.IR mmap () +.IR munmap () +.IR msync () +.in +.fi +.P +This option implies the following options: +.P +.PD 0 +.TP +.B _POSIX_FSYNC +.TP +.B _POSIX_MAPPED_FILES +.TP +.B _POSIX_MEMORY_PROTECTION +.TP +.B _POSIX_THREAD_ATTR_STACKADDR +.TP +.B _POSIX_THREAD_ATTR_STACKSIZE +.TP +.B _POSIX_THREAD_PROCESS_SHARED +.TP +.B _POSIX_THREAD_SAFE_FUNCTIONS +.TP +.B _POSIX_THREADS +.PD +.P +This option may imply the following options from the XSI option groups: +.P +.PD 0 +.TP +.RB "Encryption (" _XOPEN_CRYPT ) +.TP +.RB "Realtime (" _XOPEN_REALTIME ) +.TP +.RB "Advanced Realtime (" ADB ) +.TP +.RB "Realtime Threads (" _XOPEN_REALTIME_THREADS ) +.TP +.RB "Advanced Realtime Threads (" "ADVANCED REALTIME THREADS" ) +.TP +.RB "Tracing (" TRACING ) +.TP +.RB "XSI Streams (" STREAMS ) +.TP +.RB "Legacy (" _XOPEN_LEGACY ) +.PD +.SH SEE ALSO +.BR sysconf (3), +.BR standards (7) |