FMEMOPEN (man3p)
fmemopen — open a memory buffer stream
fmemopen — open a memory buffer stream
pthread_setspecific — thread-specific data management
isgreater — test if x greater than y
futimens, utimensat, utimes — set file access and modification times
putmsg, putpmsg — send a message on a STREAM (STREAMS)
fork — create a new process
erf, erff, erfl — error functions
pthread_mutex_trylock, pthread_mutex_unlock — lock and unlock a mutex
posix_trace_trygetnext_event — retrieve a trace event (TRACING)
gettimeofday — get the date and time