pause - wait for signal
#include <unistd.h> int pause(void);
The pause system call causes the invoking process to sleep until a signal is received.
pause always returns -1, and errno is set to ERESTARTNOHAND.
EINTR signal was received.
SVr4, SVID, POSIX, X/OPEN, BSD 4.3
kill(2), select(2), signal(2)