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posixoptions.7: Expand XSI Options groups
We define in detail the X/Open System Interfaces i.e. _XOPEN_UNIX and all of the X/Open System Interfaces (XSI) Options Groups. The XSI options groups include encryption, realtime, advanced realtime, realtime threads, advanced realtime threads, tracing, streams, and legacy interfaces. Signed-off-by: Carlos O'Donell <carlos@redhat.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Carlos O'Donell
Michael Kerrisk
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commit
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@ -779,13 +779,136 @@ The following functions are present:
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Always present (probably 0).
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Value to set a changeable special control
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character to indicate that it is disabled.
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.SH XOPEN EXTENSIONS
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.BR _XOPEN_CRYPT ,
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.BR _XOPEN_LEGACY ,
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.BR _XOPEN_REALTIME ,
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.BR _XOPEN_REALTIME_THREADS ,
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.BR _XOPEN_UNIX .
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.\" To be described.
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.SH X/OPEN SYSTEM INTERFACES EXTENSIONS
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.SS XSI - _XOPEN_CRYPT - _SC_XOPEN_CRYPT
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The following functions are present:
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.PP
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.nf
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.in +4n
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.IR crypt (),
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.IR encrypt (),
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.IR setkey ()
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.SS XSI - _XOPEN_REALTIME - _SC_XOPEN_REALTIME
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This option implies the
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.B _POSIX_ASYNCHRONOUS_IO == 200112L,
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.B _POSIX_FSYNC,
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.B _POSIX_MAPPED_FILES,
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.B _POSIX_MEMLOCK == 200112L,
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.B _POSIX_MEMLOCK_RANGE == 200112L,
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.B _POSIX_MEMORY_PROTECTION,
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.B _POSIX_MESSAGE_PASSING == 200112L,
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.B _POSIX_PRIORITIZED_IO,
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.B _POSIX_PRIORITY_SCHEDULING == 200112L,
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.B _POSIX_REALTIME_SIGNALS == 200112L,
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.B _POSIX_SEMAPHORES == 200112L,
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.B _POSIX_SHARED_MEMORY_OBJECTS == 200112L,
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.B _POSIX_SYNCHRONIZED_IO == 200112L,
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and
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.B _POSIX_TIMERS == 200112L
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options.
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.SS ADV - --- - ---
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The Advanced Realtime option group implies the
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.B _POSIX_ADVISORY_INFO,
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.B _POSIX_CLOCK_SELECTION (implies _POSIX_TIMERS),
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.B _POSIX_CPUTIME (implies _POSIX_TIMERS),
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.B _POSIX_MONOTONIC_CLOCK (implies _POSIX_TIMERS),
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.B _POSIX_SPAWN,
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.B _POSIX_SPORADIC_SERVER (implies _POSIX_PRIORITY_SCHEDULING),
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.B _POSIX_TIMEOUTS,
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and
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.B _POSIX_TYPED_MEMORY_OBJECTS
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options are all defined to 200112L.
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.SS XSI - _XOPEN_REALTIME_THREADS - _SC_XOPEN_REALTIME_THREADS
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This option implies the
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.B _POSIX_THREAD_PRIO_INHERIT,
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.B _POSIX_THREAD_PRIO_PROTECT,
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and
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.B _POSIX_THREAD_PRIORITY_SCHEDULING
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options are all defined to 200112L.
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.SS ADVANCED REALTIME THREADS - --- - ---
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The option implies the
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.B _POSIX_BARRIERS (implies _POSIX_THREADS, _POSIX_THREAD_SAFE_FUNCTIONS),
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.B _POSIX_SPIN_LOCKS (implies _POSIX_THREADS, _POSIX_THREAD_SAFE_FUNCTIONS),
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.B _POSIX_THREAD_CPUTIME (implies _POSIX_TIMERS),
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and
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.B _POSIX_THREAD_SPORADIC_SERVER (implies _POSIX_THREAD_PRIORITY_SCHEDULING)
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options are all defined to 200112L.
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.SS TRACING - --- - ---
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The option implies the
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.B _POSIX_TRACE,
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.B _POSIX_TRACE_EVENT_FILTER,
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.B _POSIX_TRACE_LOG,
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and
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.B _POSIX_TRACE_INHERIT
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options and defined to 200112L.
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.SS STREAMS - _XOPEN_STREAMS - _SC_XOPEN_STREAMS
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The following functions are present:
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.PP
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.nf
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.in +4n
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.IR fattach ()
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.IR fdetach ()
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.IR getmsg ()
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.IR getpmsg ()
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.IR ioctl ()
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.IR iastream ()
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.IR putmsg ()
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.IR putpmsg ()
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.SS XSI - _XOPEN_LEGACY - _SC_XOPEN_LEGACY
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Functions included in the legacy option group were previously mandatory,
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but are now optional in this version.
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The following functions are present:
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.PP
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.nf
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.in +4n
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.IR bcmp (),
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.IR bcopy (),
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.IR bzero (),
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.IR ecvt (),
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.IR fcvt (),
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.IR ftime (),
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.IR gcvt (),
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.IR getcwd (),
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.IR index (),
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.IR mktemp (),
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.IR rindex (),
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.IR utimes (),
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.IR wcswcs ()
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.SS XSI - _XOPEN_UNIX - _SC_XOPEN_UNIX
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The following functions are present:
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.PP
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.nf
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.in +4n
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.IR mmap (),
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.IR munmap (),
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and
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.IR msync.
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.in -4n
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.fi
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.PP
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The option implies the
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.B _POSIX_FSYNC,
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.B _POSIX_MAPPED_FILES,
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.B _POSIX_MEMORY_PROTECTION,
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.B _POSIX_THREAD_ATTR_STACKADDR,
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.B _POSIX_THREAD_ATTR_STACKSIZE,
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.B _POSIX_THREAD_PROCESS_SHARED,
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.B _POSIX_THREAD_SAFE_FUNCTIONS,
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and
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.B _POSIX_THREADS
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options.
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.PP
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The option may imply the
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.B Encryption (_XOPEN_CRYPT),
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.B Realtime (_XOPEN_REALTIME),
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.B Advanced Raltime (ADB),
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.B Realtime Threads (_XOPEN_REALTIME_THREADS),
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.B Advanced Realtime Threads (ADVANCED REALTIME THREADS),
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.B Tracing (TRACING),
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.B XSI Streams (STREAMS),
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and
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.B Legacy (_XOPEN_LEGACY)
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options from the XSI option groups.
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.SH SEE ALSO
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.BR sysconf (3),
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.BR standards (7)
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