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Annotation of 43BSDReno/lib/libc/compat-43/sigblock.2, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 The Regents of the University of California.
                      2: .\" All rights reserved.
                      3: .\"
                      4: .\" Redistribution and use in source and binary forms are permitted provided
                      5: .\" that: (1) source distributions retain this entire copyright notice and
                      6: .\" comment, and (2) distributions including binaries display the following
                      7: .\" acknowledgement:  ``This product includes software developed by the
                      8: .\" University of California, Berkeley and its contributors'' in the
                      9: .\" documentation or other materials provided with the distribution and in
                     10: .\" all advertising materials mentioning features or use of this software.
                     11: .\" Neither the name of the University nor the names of its contributors may
                     12: .\" be used to endorse or promote products derived from this software without
                     13: .\" specific prior written permission.
                     14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     17: .\"
                     18: .\"    @(#)sigblock.2  6.6 (Berkeley) 7/1/90
                     19: .\"
                     20: .TH SIGBLOCK 2 "July 1, 1990"
                     21: .UC 5
                     22: .SH NAME
                     23: sigblock \- block signals
                     24: .SH SYNOPSIS
                     25: .nf
                     26: .B #include <signal.h>
                     27: 
                     28: .B sigblock(mask);
                     29: .B int mask;
                     30: 
                     31: .B mask = sigmask(signum)
                     32: .SH DESCRIPTION
                     33: .B "This interface is made obsolete by sigprocmask(2).
                     34: .LP
                     35: .I Sigblock
                     36: causes the signals specified in
                     37: .I mask
                     38: to be added to the set of signals currently
                     39: being blocked from delivery.
                     40: Signals are blocked if the
                     41: corresponding bit in 
                     42: .I mask
                     43: is a 1; the macro
                     44: .I sigmask
                     45: is provided to construct the mask for a given
                     46: .IR signum .
                     47: .PP
                     48: It is not possible to block SIGKILL
                     49: or SIGSTOP; this restriction is silently
                     50: imposed by the system.
                     51: .SH "RETURN VALUE
                     52: The previous set of masked signals is returned.
                     53: .SH "SEE ALSO"
                     54: kill(2), sigprocmask(2), sigaction(2), sigsetmask(2), sigsetops(3)

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