atomically release blocked signals and
wait for interrupt
This interface is made obsolete by sigsuspend(2).
assigns sigmask to the set of masked signals and then
waits for a signal to arrive; on return the set of masked signals is
restored. sigmask is usually 0 to indicate that no
signals are to be blocked.
terminates by being interrupted, returning -1 with
errno set to
kill(2), sigaction(2), sigprocmask(2), sigsuspend(2), sigblock(3), sigvec(3)
sigpause() system call first appeared in
4.2BSD. In 4.3BSD-Reno, it
was reimplemented as a wrapper around
sigsuspend(2). The old system call was kept for compatibility
until OpenBSD 4.9.