sigsetmask man page on NeXTSTEP

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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)

4.2 Berkeley Distribution	 May 14, 1986			 SIGSETMASK(2)
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