TZSET (man3p)
daylight, timezone, tzname, tzset — set timezone conversion information
daylight, timezone, tzname, tzset — set timezone conversion information
getsockname — get the socket name
malloc — a memory allocator
wcstoul, wcstoull — convert a wide-character string to an unsigned long
pthread_kill — send a signal to a thread
wcsncasecmp, wcsncasecmp_l — case-insensitive wide-character string comparison
aio_error — retrieve errors status for an asynchronous I/O operation
mlockall, munlockall — lock/unlock the address space of a process (REALTIME)
setjmp — set jump point for a non-local goto
socket — create an endpoint for communication