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man pages section 3: Library Interfaces and Headers

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Updated: Thursday, June 13, 2019
 
 

libposix4(3LIB)

Name

librt, libposix4 - POSIX.1b Realtime Extensions library

Synopsis

cc [ flag... ] file... –lrt [ library... ]

Description

Historically, functions in this library provided many of the interfaces specified by the POSIX.1b Realtime Extension. See standards(7). This functionality now resides in libc(3LIB).

This library is maintained to provide backward compatibility for both runtime and compilation environments. The shared object is implemented as a filter on libc.so.1. New application development need not specify –lrt.

INTERFACES

The shared objects librt.so.1 and libposix4.so.1 provide the public interfaces defined below. See intro(3) for additional information on shared object interfaces.

aio_cancel
aio_error
aio_fsync
aio_read
aio_return
aio_suspend
aio_waitn
aio_write
clock_getres
clock_gettime
clock_nanosleep
clock_settime
close
fdatasync
fork
lio_listio
mq_close
mq_getattr
mq_notify
mq_open
mq_receive
mq_reltimedreceive_np
mq_reltimedsend_np
mq_send
mq_setattr
mq_timedreceive
mq_timedsend
mq_unlink
nanosleep
sched_get_priority_max
sched_get_priority_min
sched_getparam
sched_getscheduler
sched_rr_get_interval
sched_setparam
sched_setscheduler
sched_yield
sem_close
sem_destroy
sem_getvalue
sem_init
sem_open
sem_post
sem_reltimedwait_np
sem_timedwait
sem_trywait
sem_unlink
sem_wait
shm_open
shm_unlink
sigqueue
sigtimedwait
sigwaitinfo
timer_create
timer_delete
timer_getoverrun
timer_gettime
timer_settime

The following interfaces are unique to the 32-bit version of this library:

aio_cancel64
aio_error64
aio_fsync64
aio_read64
aio_return64
aio_suspend64
aio_waitn64
aio_write64
lio_listio64

Files

/lib/librt.so.1

shared object

/lib/64/librt.so.1

64-bit shared object file

/lib/libposix4.so.1

shared object

/lib/64/libposix4.so.1

64-bit shared object file

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/library
MT-Level
Safe

See Also

pvs(1), libc(3LIB), intro(3), attributes(7), standards(7)