SIGPAUSE(2) Linux Programmer's Manual SIGPAUSE(2)
sigpause - atomically release blocked signals and wait for interrupt
int sigpause(int sigmask);
This interface is made obsolete by sigsuspend(2).
sigpause assigns sigmask to the set of masked signals and then waits
for a signal to arrive; on return the set of masked signals is
sigmask is usually 0 to indicate that no signals are to be blocked.
sigpause always terminates by being interrupted, returning -1 with
errno set to EINTR.
4.4BSD. The sigpause function call appeared in 4.3BSD and is depre-
sigsuspend(2), kill(2), sigaction(2), sigprocmask(2), sigblock(2),
Linux 1.3 1993-07-24 SIGPAUSE(2)