netbsd man page for sem

SEM(4)							   BSD 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.

SEE ALSO
     config(1), sem_destroy(3), sem_getvalue(3), sem_init(3), sem_open(3), sem_post(3), sem_wait(3), options(4)

HISTORY
     The sem facility appeared as a kernel option in NetBSD 2.0.

BUGS
     The current implementation does not support shared, unnamed semaphores.

BSD
								 January 21, 2005							       BSD