GETPWNAM (man3p)
getpwnam, getpwnam_r — search user database for a name
getpwnam, getpwnam_r — search user database for a name
mlock, munlock — lock or unlock a range of process address space (REALTIME)
fetestexcept — test floating-point exception flags
posix_fallocate — file space control (ADVANCED REALTIME)
if_freenameindex — free memory allocated by if_nameindex
posix_spawnattr_setflags — set the spawn-flags attribute of a spawn attributes object (ADVANCED REALTIME)
fputc — put a byte on a stream
pthread_create — thread creation
geteuid — get the effective user ID
jrand48 — generate a uniformly distributed pseudo-random long signed integer