FreeBSD Manual Pages
SEM(4) BSD Kernel Interfaces Manual SEM(4) NAME sem -- POSIX semaphores SYNOPSIS To compile this driver into the kernel, place the following line in your kernel configuration file: options P1003_1B_SEMAPHORES Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): sem_load="YES" To load the driver as a module at run-time, run the following command as root: kldload sem DESCRIPTION The sem facility provides system calls used by the standard C library (libc) to implement POSIX semaphores. This facility offers support for such functions as sem_init() and sem_wait(). 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 in FreeBSD 5.0. BSD February 7, 2014 BSD
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY
Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=sem&sektion=4&manpath=FreeBSD+12.1-RELEASE+and+Ports>