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Annotation of 43BSDTahoe/man/man2/sigblock.2, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)sigblock.2  6.3 (Berkeley) 5/14/86
                      6: .\"
                      7: .TH SIGBLOCK 2 "May 14, 1986"
                      8: .UC 5
                      9: .SH NAME
                     10: sigblock \- block signals
                     11: .SH SYNOPSIS
                     12: .nf
                     13: .B #include <signal.h>
                     14: 
                     15: .B sigblock(mask);
                     16: .B int mask;
                     17: 
                     18: .B mask = sigmask(signum)
                     19: .SH DESCRIPTION
                     20: .I Sigblock
                     21: causes the signals specified in
                     22: .I mask
                     23: to be added to the set of signals currently
                     24: being blocked from delivery.
                     25: Signals are blocked if the
                     26: corresponding bit in 
                     27: .I mask
                     28: is a 1; the macro
                     29: .I sigmask
                     30: is provided to construct the mask for a given
                     31: .IR signum .
                     32: .PP
                     33: It is not possible to block SIGKILL,
                     34: SIGSTOP, or SIGCONT;  this restriction is silently
                     35: imposed by the system.
                     36: .SH "RETURN VALUE
                     37: The previous set of masked signals is returned.
                     38: .SH "SEE ALSO"
                     39: kill(2), sigvec(2), sigsetmask(2)

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