Интерактивная система просмотра системных руководств (man-ов) posixoptions (7) >> posixoptions ( Linux man: Макропакеты и соглашения )
NAME
posixoptions - optional parts of the POSIX standard
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
sysconf fpathconf pathconf confstr getconf sysconf
We give the name of the POSIX abbreviation, the option, the name of the
sysconf ()
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.
ADV - _POSIX_ADVISORY_INFO - _SC_ADVISORY_INFO
The following advisory functions are present:
posix_fadvise (),
posix_fallocate (),
posix_memalign (),
posix_madvise ().
AIO - _POSIX_ASYNCHRONOUS_IO - _SC_ASYNCHRONOUS_IO
The header
<aio.h >
is present.
The following functions are present:
aio_cancel (),
aio_error (),
aio_fsync (),
aio_read (),
aio_return (),
aio_suspend (),
aio_write (),
lio_listio ().
BAR - _POSIX_BARRIERS - _SC_BARRIERS
This option implies the
_POSIX_THREADS
and
_POSIX_THREAD_SAFE_FUNCTIONS
options.
The following functions are present:
pthread_barrier_destroy (),
pthread_barrier_init (),
pthread_barrier_wait (),
pthread_barrierattr_destroy (),
pthread_barrierattr_init ().
--- - 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 non-root can only
set the group of a file to one of the groups it belongs to.
This affects the functions
chown (),
fchown ().
CS - _POSIX_CLOCK_SELECTION - _SC_CLOCK_SELECTION
This option implies the
_POSIX_TIMERS
option.
The following functions are present:
pthread_condattr_getclock (),
pthread_condattr_setclock (),
clock_nanosleep ().
If
CLOCK_REALTIME
is changed by the function
clock_settime (),
then this affects all timers set for an absolute time.
CPT - _POSIX_CPUTIME - _SC_CPUTIME
The clockID CLOCK_PROCESS_CPUTIME_ID is supported.
The initial value of this clock is 0 for each process.
This option implies the
_POSIX_TIMERS
option.
The function
clock_getcpuclockid ()
is present.
--- - _POSIX_FILE_LOCKING - _SC_FILE_LOCKING
This option has been deleted.
Not in final XPG6.
FSC - _POSIX_FSYNC - _SC_FSYNC
The function
fsync ()
is present.
IP6 - _POSIX_IPV6 - _SC_IPV6
Internet Protocol Version 6 is supported.
--- - _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:
setpgid (),
tcdrain (),
tcflush (),
tcgetpgrp (),
tcsendbreak (),
tcsetattr (),
tcsetpgrp ().
MF - _POSIX_MAPPED_FILES - _SC_MAPPED_FILES
Shared memory is supported.
The include file
<sys/mman.h >
is present.
The following functions are present:
mmap (),
msync (),
munmap ().
ML - _POSIX_MEMLOCK - _SC_MEMLOCK
Shared memory can be locked into core.
The functions
mlockall (),
munlockall ()
are present.
MR/MLR - _POSIX_MEMLOCK_RANGE - _SC_MEMLOCK_RANGE
More precisely, ranges can be locked into core.
The functions
mlock (),
munlock ()
are present.
MPR - _POSIX_MEMORY_PROTECTION - _SC_MEMORY_PROTECTION
The function
mprotect ()
is present.
MSG - _POSIX_MESSAGE_PASSING - _SC_MESSAGE_PASSING
The include file
<mqueue.h >
is present.
The following functions are present:
mq_close (),
mq_getattr (),
mq_notify (),
mq_open (),
mq_receive (),
mq_send (),
mq_setattr (),
mq_unlink ().
MON - _POSIX_MONOTONIC_CLOCK - _SC_MONOTONIC_CLOCK
CLOCK_MONOTONIC
is supported.
This option implies the
_POSIX_TIMERS
option.
Affected functions are
aio_suspend (),
clock_getres (),
clock_gettime (),
clock_settime (),
timer_create ().
--- - _POSIX_MULTI_PROCESS - _SC_MULTI_PROCESS
This option has been deleted.
Not in final XPG6.
--- - _POSIX_NO_TRUNC
If this option is in effect (as it always is under POSIX.1-2001)
then pathname components longer than
NAME_MAX
are not truncated,
but give an error.
This property may be dependent on the path prefix of the component.
PIO - _POSIX_PRIORITIZED_IO - _SC_PRIORITIZED_IO
This option says that one can specify priorities for asynchronous I/O.
This affects the functions
aio_read (),
aio_write ().
PS - _POSIX_PRIORITY_SCHEDULING - _SC_PRIORITY_SCHEDULING
The include file
<sched.h >
is present.
The following functions are present:
sched_get_priority_max (),
sched_get_priority_min (),
sched_getparam (),
sched_getscheduler (),
sched_rr_get_interval (),
sched_setparam (),
sched_setscheduler (),
sched_yield ().
If also
_POSIX_SPAWN
is in effect, then the following functions are present:
posix_spawnattr_getschedparam (),
posix_spawnattr_getschedpolicy (),
posix_spawnattr_setschedparam (),
posix_spawnattr_setschedpolicy ().
RS - _POSIX_RAW_SOCKETS
Raw sockets are supported.
Affected functions are
getsockopt (),
setsockopt ().
--- - _POSIX_READER_WRITER_LOCKS - _SC_READER_WRITER_LOCKS
This option implies the
_POSIX_THREADS
option.
Conversely,
under POSIX.1-2001 the
_POSIX_THREADS
option implies this option.
The following functions are present:
pthread_rwlock_destroy (),
pthread_rwlock_init (),
pthread_rwlock_rdlock (),
pthread_rwlock_tryrdlock (),
pthread_rwlock_trywrlock (),
pthread_rwlock_unlock (),
pthread_rwlock_wrlock (),
pthread_rwlockattr_destroy (),
pthread_rwlockattr_init ().
RTS - _POSIX_REALTIME_SIGNALS - _SC_REALTIME_SIGNALS
Realtime signals are supported.
The following functions are present:
sigqueue (),
sigtimedwait (),
sigwaitinfo ().
--- - _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:
regcomp (),
regerror (),
regexec (),
regfree ().
--- - _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.
Affected functions are
exec (),
kill (),
seteuid (),
setegid (),
setgid (),
setuid ().
SEM - _POSIX_SEMAPHORES - _SC_SEMAPHORES
The include file
<semaphore.h >
is present.
The following functions are present:
sem_close (),
sem_destroy (),
sem_getvalue (),
sem_init (),
sem_open (),
sem_post (),
sem_trywait (),
sem_unlink (),
sem_wait ().
SHM - _POSIX_SHARED_MEMORY_OBJECTS - _SC_SHARED_MEMORY_OBJECTS
The following functions are present:
mmap (),
munmap (),
shm_open (),
shm_unlink ().
--- - _POSIX_SHELL - _SC_SHELL
If this option is in effect (as it always is under POSIX.1-2001),
the function
system ()
is present.
SPN - _POSIX_SPAWN - _SC_SPAWN
This option describes support for process creation in a context where
it is difficult or impossible to use
fork (),
for example, because no MMU is present.
If
_POSIX_SPAWN
is in effect, then the include file
<spawn.h >
and the following functions are present:
posix_spawn (),
posix_spawn_file_actions_addclose (),
posix_spawn_file_actions_adddup2 (),
posix_spawn_file_actions_addopen (),
posix_spawn_file_actions_destroy (),
posix_spawn_file_actions_init (),
posix_spawnattr_destroy (),
posix_spawnattr_getsigdefault (),
posix_spawnattr_getflags (),
posix_spawnattr_getpgroup (),
posix_spawnattr_getsigmask (),
posix_spawnattr_init (),
posix_spawnattr_setsigdefault (),
posix_spawnattr_setflags (),
posix_spawnattr_setpgroup (),
posix_spawnattr_setsigmask (),
posix_spawnp ().
If also
_POSIX_PRIORITY_SCHEDULING
is in effect, then
the following functions are present:
posix_spawnattr_getschedparam (),
posix_spawnattr_getschedpolicy (),
posix_spawnattr_setschedparam (),
posix_spawnattr_setschedpolicy ().
SPI - _POSIX_SPIN_LOCKS - _SC_SPIN_LOCKS
This option implies the
_POSIX_THREADS
and
_POSIX_THREAD_SAFE_FUNCTIONS
options.
The following functions are present:
pthread_spin_destroy (),
pthread_spin_init (),
pthread_spin_lock (),
pthread_spin_trylock (),
pthread_spin_unlock ().
SS - _POSIX_SPORADIC_SERVER - _SC_SPORADIC_SERVER
The scheduling policy
SCHED_SPORADIC
is supported.
This option implies the
_POSIX_PRIORITY_SCHEDULING
option.
Affected functions are
sched_setparam (),
sched_setscheduler ().
SIO - _POSIX_SYNCHRONIZED_IO - _SC_SYNCHRONIZED_IO
Affected functions are
open (),
msync (),
fsync (),
fdatasync ().
TSA - _POSIX_THREAD_ATTR_STACKADDR - _SC_THREAD_ATTR_STACKADDR
Affected functions are
pthread_attr_getstack (),
pthread_attr_getstackaddr (),
pthread_attr_setstack (),
pthread_attr_setstackaddr ().
TSS - _POSIX_THREAD_ATTR_STACKSIZE - _SC_THREAD_ATTR_STACKSIZE
Affected functions are
pthread_attr_getstack (),
pthread_attr_getstacksize (),
pthread_attr_setstack (),
pthread_attr_setstacksize ().
TCT - _POSIX_THREAD_CPUTIME - _SC_THREAD_CPUTIME
The clockID CLOCK_THREAD_CPUTIME_ID is supported.
This option implies the
_POSIX_TIMERS
option.
Affected functions are
pthread_getcpuclockid (),
clock_getres (),
clock_gettime (),
clock_settime (),
timer_create ().
TPI - _POSIX_THREAD_PRIO_INHERIT - _SC_THREAD_PRIO_INHERIT
Affected functions are
pthread_mutexattr_getprotocol (),
pthread_mutexattr_setprotocol ().
TPP - _POSIX_THREAD_PRIO_PROTECT - _SC_THREAD_PRIO_PROTECT
Affected functions are
pthread_mutex_getprioceiling (),
pthread_mutex_setprioceiling (),
pthread_mutexattr_getprioceiling (),
pthread_mutexattr_getprotocol (),
pthread_mutexattr_setprioceiling (),
pthread_mutexattr_setprotocol ().
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.
Affected functions are
pthread_attr_getinheritsched (),
pthread_attr_getschedpolicy (),
pthread_attr_getscope (),
pthread_attr_setinheritsched (),
pthread_attr_setschedpolicy (),
pthread_attr_setscope (),
pthread_getschedparam (),
pthread_setschedparam (),
pthread_setschedprio ().
TSH - _POSIX_THREAD_PROCESS_SHARED - _SC_THREAD_PROCESS_SHARED
Affected functions are
pthread_barrierattr_getpshared (),
pthread_barrierattr_setpshared (),
pthread_condattr_getpshared (),
pthread_condattr_setpshared (),
pthread_mutexattr_getpshared (),
pthread_mutexattr_setpshared (),
pthread_rwlockattr_getpshared (),
pthread_rwlockattr_setpshared ().
TSF - _POSIX_THREAD_SAFE_FUNCTIONS - _SC_THREAD_SAFE_FUNCTIONS
Affected functions are
readdir_r (),
getgrgid_r (),
getgrnam_r (),
getpwnam_r (),
getpwuid_r (),
flockfile (),
ftrylockfile (),
funlockfile (),
getc_unlocked (),
getchar_unlocked (),
putc_unlocked (),
putchar_unlocked (),
rand_r (),
strerror_r (),
strtok_r (),
asctime_r (),
ctime_r (),
gmtime_r (),
localtime_r ().
TSP - _POSIX_THREAD_SPORADIC_SERVER - _SC_THREAD_SPORADIC_SERVER
This option implies the
_POSIX_THREAD_PRIORITY_SCHEDULING
option.
Affected functions are
sched_getparam (),
sched_setparam (),
sched_setscheduler ().
THR - _POSIX_THREADS - _SC_THREADS
Basic support for POSIX threads is available.
The following functions are present:
pthread_atfork (),
pthread_attr_destroy (),
pthread_attr_getdetachstate (),
pthread_attr_getschedparam (),
pthread_attr_init (),
pthread_attr_setdetachstate (),
pthread_attr_setschedparam (),
pthread_cancel (),
pthread_cleanup_push (),
pthread_cleanup_pop (),
pthread_cond_broadcast (),
pthread_cond_destroy (),
pthread_cond_init (),
pthread_cond_signal (),
pthread_cond_timedwait (),
pthread_cond_wait (),
pthread_condattr_destroy (),
pthread_condattr_init (),
pthread_create (),
pthread_detach (),
pthread_equal (),
pthread_exit (),
pthread_getspecific (),
pthread_join (),
pthread_key_create (),
pthread_key_delete (),
pthread_mutex_destroy (),
pthread_mutex_init (),
pthread_mutex_lock (),
pthread_mutex_trylock (),
pthread_mutex_unlock (),
pthread_mutexattr_destroy (),
pthread_mutexattr_init (),
pthread_once (),
pthread_rwlock_destroy (),
pthread_rwlock_init (),
pthread_rwlock_rdlock (),
pthread_rwlock_tryrdlock (),
pthread_rwlock_trywrlock (),
pthread_rwlock_unlock (),
pthread_rwlock_wrlock (),
pthread_rwlockattr_destroy (),
pthread_rwlockattr_init (),
pthread_self (),
pthread_setcancelstate (),
pthread_setcanceltype (),
pthread_setspecific (),
pthread_testcancel ().
TMO - _POSIX_TIMEOUTS - _SC_TIMEOUTS
The following functions are present:
mq_timedreceive (),
mq_timedsend (),
pthread_mutex_timedlock (),
pthread_rwlock_timedrdlock (),
pthread_rwlock_timedwrlock (),
sem_timedwait (),
posix_trace_timedgetnext_event ().
TMR - _POSIX_TIMERS - _SC_TIMERS
The following functions are present:
clock_getres (),
clock_gettime (),
clock_settime (),
nanosleep (),
timer_create (),
timer_delete (),
timer_gettime (),
timer_getoverrun (),
timer_settime ().
TRC - _POSIX_TRACE - _SC_TRACE
POSIX tracing is available.
The following functions are present:
posix_trace_attr_destroy (),
posix_trace_attr_getclockres (),
posix_trace_attr_getcreatetime (),
posix_trace_attr_getgenversion (),
posix_trace_attr_getmaxdatasize (),
posix_trace_attr_getmaxsystemeventsize (),
posix_trace_attr_getmaxusereventsize (),
posix_trace_attr_getname (),
posix_trace_attr_getstreamfullpolicy (),
posix_trace_attr_getstreamsize (),
posix_trace_attr_init (),
posix_trace_attr_setmaxdatasize (),
posix_trace_attr_setname (),
posix_trace_attr_setstreamsize (),
posix_trace_attr_setstreamfullpolicy (),
posix_trace_clear (),
posix_trace_create (),
posix_trace_event (),
posix_trace_eventid_equal (),
posix_trace_eventid_get_name (),
posix_trace_eventid_open (),
posix_trace_eventtypelist_getnext_id (),
posix_trace_eventtypelist_rewind (),
posix_trace_flush (),
posix_trace_get_attr (),
posix_trace_get_status (),
posix_trace_getnext_event (),
posix_trace_shutdown (),
posix_trace_start (),
posix_trace_stop (),
posix_trace_trygetnext_event ().
TEF - _POSIX_TRACE_EVENT_FILTER - _SC_TRACE_EVENT_FILTER
This option implies the
_POSIX_TRACE
option.
The following functions are present:
posix_trace_eventset_add (),
posix_trace_eventset_del (),
posix_trace_eventset_empty (),
posix_trace_eventset_fill (),
posix_trace_eventset_ismember (),
posix_trace_get_filter (),
posix_trace_set_filter (),
posix_trace_trid_eventid_open ().
TRI - _POSIX_TRACE_INHERIT - _SC_TRACE_INHERIT
Tracing children of the traced process is supported.
This option implies the
_POSIX_TRACE
option.
The following functions are present:
posix_trace_attr_getinherited (),
posix_trace_attr_setinherited ().
TRL - _POSIX_TRACE_LOG - _SC_TRACE_LOG
This option implies the
_POSIX_TRACE
option.
The following functions are present:
posix_trace_attr_getlogfullpolicy (),
posix_trace_attr_getlogsize (),
posix_trace_attr_setlogfullpolicy (),
posix_trace_attr_setlogsize (),
posix_trace_close (),
posix_trace_create_withlog (),
posix_trace_open (),
posix_trace_rewind ().
TYM - _POSIX_TYPED_MEMORY_OBJECTS - _SC_TYPED_MEMORY_OBJECT
The following functions are present:
posix_mem_offset (),
posix_typed_mem_get_info (),
posix_typed_mem_open ().
--- - _POSIX_VDISABLE
Always present (probably 0).
Value to set a changeable special control
character to indicate that it is disabled.
XOPEN EXTENSIONS
_XOPEN_CRYPT ,
_XOPEN_LEGACY ,
_XOPEN_REALTIME ,
_XOPEN_REALTIME_THREADS ,
_XOPEN_UNIX .
SEE ALSO
sysconf standards
COLOPHON
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
NAME
DESCRIPTION
ADV - _POSIX_ADVISORY_INFO - _SC_ADVISORY_INFO
AIO - _POSIX_ASYNCHRONOUS_IO - _SC_ASYNCHRONOUS_IO
BAR - _POSIX_BARRIERS - _SC_BARRIERS
--- - POSIX_CHOWN_RESTRICTED
CS - _POSIX_CLOCK_SELECTION - _SC_CLOCK_SELECTION
CPT - _POSIX_CPUTIME - _SC_CPUTIME
--- - _POSIX_FILE_LOCKING - _SC_FILE_LOCKING
FSC - _POSIX_FSYNC - _SC_FSYNC
IP6 - _POSIX_IPV6 - _SC_IPV6
--- - _POSIX_JOB_CONTROL - _SC_JOB_CONTROL
MF - _POSIX_MAPPED_FILES - _SC_MAPPED_FILES
ML - _POSIX_MEMLOCK - _SC_MEMLOCK
MR/MLR - _POSIX_MEMLOCK_RANGE - _SC_MEMLOCK_RANGE
MPR - _POSIX_MEMORY_PROTECTION - _SC_MEMORY_PROTECTION
MSG - _POSIX_MESSAGE_PASSING - _SC_MESSAGE_PASSING
MON - _POSIX_MONOTONIC_CLOCK - _SC_MONOTONIC_CLOCK
--- - _POSIX_MULTI_PROCESS - _SC_MULTI_PROCESS
--- - _POSIX_NO_TRUNC
PIO - _POSIX_PRIORITIZED_IO - _SC_PRIORITIZED_IO
PS - _POSIX_PRIORITY_SCHEDULING - _SC_PRIORITY_SCHEDULING
RS - _POSIX_RAW_SOCKETS
--- - _POSIX_READER_WRITER_LOCKS - _SC_READER_WRITER_LOCKS
RTS - _POSIX_REALTIME_SIGNALS - _SC_REALTIME_SIGNALS
--- - _POSIX_REGEXP - _SC_REGEXP
--- - _POSIX_SAVED_IDS - _SC_SAVED_IDS
SEM - _POSIX_SEMAPHORES - _SC_SEMAPHORES
SHM - _POSIX_SHARED_MEMORY_OBJECTS - _SC_SHARED_MEMORY_OBJECTS
--- - _POSIX_SHELL - _SC_SHELL
SPN - _POSIX_SPAWN - _SC_SPAWN
SPI - _POSIX_SPIN_LOCKS - _SC_SPIN_LOCKS
SS - _POSIX_SPORADIC_SERVER - _SC_SPORADIC_SERVER
SIO - _POSIX_SYNCHRONIZED_IO - _SC_SYNCHRONIZED_IO
TSA - _POSIX_THREAD_ATTR_STACKADDR - _SC_THREAD_ATTR_STACKADDR
TSS - _POSIX_THREAD_ATTR_STACKSIZE - _SC_THREAD_ATTR_STACKSIZE
TCT - _POSIX_THREAD_CPUTIME - _SC_THREAD_CPUTIME
TPI - _POSIX_THREAD_PRIO_INHERIT - _SC_THREAD_PRIO_INHERIT
TPP - _POSIX_THREAD_PRIO_PROTECT - _SC_THREAD_PRIO_PROTECT
TPS - _POSIX_THREAD_PRIORITY_SCHEDULING - _SC_THREAD_PRIORITY_SCHEDULING
TSH - _POSIX_THREAD_PROCESS_SHARED - _SC_THREAD_PROCESS_SHARED
TSF - _POSIX_THREAD_SAFE_FUNCTIONS - _SC_THREAD_SAFE_FUNCTIONS
TSP - _POSIX_THREAD_SPORADIC_SERVER - _SC_THREAD_SPORADIC_SERVER
THR - _POSIX_THREADS - _SC_THREADS
TMO - _POSIX_TIMEOUTS - _SC_TIMEOUTS
TMR - _POSIX_TIMERS - _SC_TIMERS
TRC - _POSIX_TRACE - _SC_TRACE
TEF - _POSIX_TRACE_EVENT_FILTER - _SC_TRACE_EVENT_FILTER
TRI - _POSIX_TRACE_INHERIT - _SC_TRACE_INHERIT
TRL - _POSIX_TRACE_LOG - _SC_TRACE_LOG
TYM - _POSIX_TYPED_MEMORY_OBJECTS - _SC_TYPED_MEMORY_OBJECT
--- - _POSIX_VDISABLE
XOPEN EXTENSIONS
SEE ALSO
COLOPHON
