pause(2) -- Linux man page
pause - wait for signal
library function causes the invoking process (or thread) to sleep
until a signal is received that either terminates it or causes it
to call a signal-catching function.
function only returns when a signal was caught and the
signal-catching function returned. In this case
returns -1, and
is set to
a signal was caught and the signal-catching function returned.
SVr4, SVID, POSIX, X/OPEN, BSD 4.3