sys_sem.h (man0p)
sys/sem.h — XSI semaphore facility
sys/sem.h — XSI semaphore facility
fnmatch.h — filename-matching types
pwd.h — password structure
locale.h — category macros
fenv.h — floating-point environment
grp.h — group structure
fcntl.h — file control options
tgmath.h — type-generic macros
stdio.h — standard buffered input/output
nl_types.h — data types