Copyright (c) 1983 The Regents of the University of California.
All rights reserved.
Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
@(#)sigblock.2 6.4 (Berkeley) 05/18/89
All rights reserved.
Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
@(#)sigblock.2 6.4 (Berkeley) 05/18/89
SIGBLOCK 2 ""
C 5 NAME
sigblock - block signals
SYNOPSIS
#include <signal.h> sigblock(mask); int mask; mask = sigmask(signum)DESCRIPTIONSigblock causes the signals specified in mask to be added to the set of signals currently being 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 .It is not possible to block SIGKILL, SIGSTOP, or SIGCONT; this restriction is silently imposed by the system.
"RETURN VALUEThe previous set of masked signals is returned."SEE ALSO"kill(2), sigvec(2), sigsetmask(2)