sem(4)

NAME

sem - POSIX semaphores

SYNOPSIS

To link into the kernel:
      options P1003_1B_SEMAPHORES
To load as a kernel loadable module:
      kldload sem

DESCRIPTION

The sem facility provides system calls used by the standard

C library
(libc) to implement POSIX semaphores. It is available both

as a kernel
option for static inclusion and as a dynamic kernel module.

SEE ALSO

sem_destroy(3), sem_getvalue(3), sem_init(3), sem_open(3),

sem_post(3),
sem_wait(3), config(8), kldload(8), kldunload(8)

HISTORY

The sem facility appeared as a kernel option in FreeBSD 3.0.

The sem
kernel module appeared in FreeBSD 5.0.

BSD January 14, 2003

BSD