sigsetmask(2)                                       sigsetmask(2)



     NAME
          sigsetmask - set current signal mask

     SYNOPSIS
          #include <signal.h>

          int sigsetmask(mask);
          int mask;

          sigmask(signum)
          int 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 pro-
          vided 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), signal(3).





























     April, 1990                                                     1