| SEM(4) | Kernel Interfaces Manual | SEM(4) | 
NAME
 sem — POSIX semaphores
SYNOPSIS
 To link into the kernel:
options P1003_1B_SEMAPHORE
 
DESCRIPTION
 The sem facility provides system calls used by the standard C library (libc) to implement POSIX semaphores.
HISTORY
 The sem facility appeared as a kernel option in NetBSD 2.0.