sigpause(2)                                           sigpause(2)



     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).































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