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SIGBLOCK(2)		    BSD	System Calls Manual		   SIGBLOCK(2)

NAME
     sigblock -- block signals

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <signal.h>

     int
     sigblock(int mask);

     int
     sigmask(signum);

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

     Sigblock()	adds the signals specified in mask to the set of signals cur-
     rently being blocked from delivery.  Signals are blocked if the corre-
     sponding bit in mask is a 1; the macro sigmask() is provided to construct
     the mask for a given signum.

     It	is not possible	to block SIGKILL or SIGSTOP; this restriction is
     silently imposed by the system.

RETURN VALUES
     The previous set of masked	signals	is returned.

SEE ALSO
     kill(2), sigaction(2), sigprocmask(2), sigsetmask(2), sigsetops(3)

HISTORY
     The sigblock() function call appeared in 4.2BSD and has been deprecated.

BSD				 June 2, 1993				   BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY

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