'\" te
.\" Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
.TH librt 3LIB "23 Aug 2011" "SunOS 5.11" "Interface Libraries"
.SH NAME
librt, libposix4 \- POSIX.1b Realtime Extensions library
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lrt\fR [ \fIlibrary\fR... ]
.fi

.SH DESCRIPTION
.sp
.LP
Historically, functions in this library provided many of the interfaces specified by the POSIX.1b Realtime Extension.  See \fBstandards\fR(5). This functionality now resides in \fBlibc\fR(3LIB).
.sp
.LP
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 \fB-lrt\fR.
.SH INTERFACES
.sp
.LP
The shared objects \fBlibrt.so.1\fR and \fBlibposix4.so.1\fR provide the public interfaces defined below. See \fBIntro\fR(3) for additional information on shared object interfaces.
.sp

.sp
.TS
tab();
lw(2.75i) lw(2.75i) 
lw(2.75i) lw(2.75i) 
.
\fBaio_cancel\fR\fBaio_error\fR
\fBaio_fsync\fR\fBaio_read\fR
\fBaio_return\fR\fBaio_suspend\fR
\fBaio_waitn\fR\fBaio_write\fR
\fBclock_getres\fR\fBclock_gettime\fR
\fBclock_nanosleep\fR\fBclock_settime\fR
\fBclose\fR\fBfdatasync\fR
\fBfork\fR\fBlio_listio\fR
\fBmq_close\fR\fBmq_getattr\fR
\fBmq_notify\fR\fBmq_open\fR
\fBmq_receive\fR\fBmq_reltimedreceive_np\fR
\fBmq_reltimedsend_np\fR\fBmq_send\fR
\fBmq_setattr\fR\fBmq_timedreceive\fR
\fBmq_timedsend\fR\fBmq_unlink\fR
\fBnanosleep\fR\fBsched_get_priority_max\fR
\fBsched_get_priority_min\fR\fBsched_getparam\fR
\fBsched_getscheduler\fR\fBsched_rr_get_interval\fR
\fBsched_setparam\fR\fBsched_setscheduler\fR
\fBsched_yield\fR\fBsem_close\fR
\fBsem_destroy\fR\fBsem_getvalue\fR
\fBsem_init\fR\fBsem_open\fR
\fBsem_post\fR\fBsem_reltimedwait_np\fR
\fBsem_timedwait\fR\fBsem_trywait\fR
\fBsem_unlink\fR\fBsem_wait\fR
\fBshm_open\fR\fBshm_unlink\fR
\fBsigqueue\fR\fBsigtimedwait\fR
\fBsigwaitinfo\fR\fBtimer_create\fR
\fBtimer_delete\fR\fBtimer_getoverrun\fR
\fBtimer_gettime\fR\fBtimer_settime\fR
.TE

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

.sp
.TS
tab();
lw(2.75i) lw(2.75i) 
lw(2.75i) lw(2.75i) 
.
\fBaio_cancel64\fR\fBaio_error64\fR
\fBaio_fsync64\fR\fBaio_read64\fR
\fBaio_return64\fR\fBaio_suspend64\fR
\fBaio_waitn64\fR\fBaio_write64\fR
\fBlio_listio64\fR
.TE

.SH FILES
.sp
.ne 2
.mk
.na
\fB\fB/lib/librt.so.1\fR\fR
.ad
.RS 26n
.rt  
shared object
.RE

.sp
.ne 2
.mk
.na
\fB\fB/lib/64/librt.so.1\fR\fR
.ad
.RS 26n
.rt  
64-bit shared object file
.RE

.sp
.ne 2
.mk
.na
\fB\fB/lib/libposix4.so.1\fR\fR
.ad
.RS 26n
.rt  
shared object
.RE

.sp
.ne 2
.mk
.na
\fB\fB/lib/64/libposix4.so.1\fR\fR
.ad
.RS 26n
.rt  
64-bit shared object file
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Availabilitysystem/library
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBpvs\fR(1), \fBIntro\fR(3), \fBlibc\fR(3LIB), \fBattributes\fR(5), \fBstandards\fR(5)