osx man page for pause

PAUSE(3)						   BSD Library Functions Manual 						  PAUSE(3)

NAME
     pause -- stop until signal

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     pause(void);

DESCRIPTION
     Pause is made obsolete by sigsuspend(2).

     The pause() function forces a process to pause until a signal is received from either the kill(2) function or an interval timer.  (See
     setitimer(2).)  Upon termination of a signal handler started during a pause(), the pause() call will return.

RETURN VALUES
     Always returns -1.

ERRORS
     The pause() function always returns:

     [EINTR]		The call was interrupted.

SEE ALSO
     kill(2), select(2), sigsuspend(2)

HISTORY
     A pause() syscall appeared in Version 6 AT&T UNIX.

BSD
								   June 4, 1993 							       BSD