SYNOPSIS

     #include <signal.h>

     int
     sigsetmask(int mask);

     sigmask(signum);

DESCRIPTION

     This interface is made obsolete by: sigprocmask(2).

     Sigsetmask() sets the current signal mask.  Signals are blocked from
     delivery 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 or SIGSTOP to be blocked.

RETURN VALUES

     The previous set of masked signals is returned.

SEE ALSO

     kill(2), sigaction(2), sigblock(2), sigprocmask(2), sigsuspend(2),
     sigvec(2), sigsetops(3)

HISTORY

     The sigsetmask() function call appeared in 4.2BSD and has been depre-
     cated.

BSD                              June 2, 1993                              BSD