this: • sigwaitinfo (2), sigtimedwait (2), and sigwait (3) suspend execution until one of the signals ... sigset (3), sigsetops (3), sigvec (3), sigwait (3), strsignal (3), swapcon…sigwaitinfo (2), sigtimedwait (2), and sigwait (3) interfaces silently ignore requests to wait for theselist in POSIX.1-2008)] sigsuspend() sigtimedwait() sigwait() sigwaitinfo() sleep() system() tcdrain() usleep() [POSIX.1-2001 only (function removed