limits.h (man0p)
limits.h — implementation-defined constants
limits.h — implementation-defined constants
semaphore.h — semaphores
syslog.h — definitions for system error logging
trace.h — tracing
sys/time.h — time types
net/if.h — sockets local interfaces
wordexp.h — word-expansion types
ftw.h — file tree traversal
sys/msg.h — XSI message queue structures
glob.h — pathname pattern-matching types