NetBSD/share/man/man4/sem.4

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.\" $NetBSD: sem.4,v 1.3 2005/06/20 13:25:24 peter Exp $
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.\" Copyright (c) 2002 Tim J. Robbins
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.\" From: FreeBSD: src/share/man/man4/sem.4,v 1.2 2003/06/02 11:19:23 ru
.\"
.Dd January 21, 2005
.Dt SEM 4
.Os
.Sh NAME
.Nm sem
.Nd POSIX semaphores
.Sh SYNOPSIS
To link into the kernel:
.Bd -ragged -offset indent
.Cd "options P1003_1B_SEMAPHORE"
.Ed
.Sh DESCRIPTION
The
.Nm
facility provides system calls used by the standard C library
.Pq libc
to implement
.Tn POSIX
semaphores.
.Sh SEE ALSO
.Xr config 1 ,
.Xr sem_destroy 3 ,
.Xr sem_getvalue 3 ,
.Xr sem_init 3 ,
.Xr sem_open 3 ,
.Xr sem_post 3 ,
.Xr sem_wait 3 ,
.Xr options 4
.Sh HISTORY
The
.Nm
facility appeared as a kernel option in
.Nx 2.0 .
.Sh BUGS
The current implementation does not support shared, unnamed semaphores.