NAME
sigpause - atomically release blocked signals and wait for
interrupt

SYNOPSIS
sigpause(sigmask)
int sigmask;

DESCRIPTION
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 restored. Sigmask is usually 0 to indicate that no signals are
now to be blocked. Sigpause always terminates by being
interrupted, returning -1 with errno set to EINTR.

In normal usage, a signal is blocked using sigblock(2), to begin a
critical section, variables modified on the occurrence of the
signal are examined to determine that there is no work to be done,
and the process pauses awaiting work by using sigpause with the
mask returned by sigblock.

SEE ALSO
sigblock(2), sigvec(2)