sigsetmask(2)                                       sigsetmask(2)



     NAME
          sigsetmask - set current signal mask

     SYNOPSIS
          #include <signal.h>

          sigsetmask(mask);
          int mask;

          mask = sigmask(signum)

     DESCRIPTION
          sigsetmask sets the current signal mask (those signals that
          are blocked from delivery).  Signals are blocked if the
          corresponding bit in mask is a 1; the macro sigmask is
          provided to construct the mask for a given signum.

          The system quietly disallows SIGKILL, SIGSTOP, or SIGCONT to
          be blocked.

     RETURN VALUE
          The previous set of masked signals is returned.

     SEE ALSO
          kill(2), sigvec(2), sigblock(2), sigpause(2).






























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