#include <sys/un.h>
Kernel (KEXT) › BSD (kernel)

sys/un.h Kernel.framework

This header declares nothing itself under the arm64 configuration; it groups the headers below.

sys/appleapiopts.h
sys/cdefs.h
sys/_types.hType definitions; takes common type definitions that must be used
also includes: Kernel/sys/_types/_sa_family_t.h