sigsetmask(2)                  DG/UX R4.11MU05                 sigsetmask(2)


NAME
       sigsetmask - specify set of blocked signals

SYNOPSIS
       #include <signal.h>

       int  sigsetmask (signalmask)
       int  signalmask;

   where:
       signalmask    Set of signals to be blocked

DESCRIPTION
       Sigsetmask assigns the set of signals specified in signalmask to the
       set of signals blocked from presentation.  Signal s is represented by
       the value sigmask(s) in signalmask.

       It is not possible to block SIGKILL or SIGSTOP.  It may or may not be
       possible to block signals that are not defined by the system.  An
       attempt to block these signals will not produce an error.

ACCESS CONTROL
       None.

RETURN VALUE
       oldsignalmask   The previous set of signals being blocked from
                         presentation.

DIAGNOSTICS
       None.

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


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