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Annotation of src/lib/libc/compat-43/sigblock.3, Revision 1.4

1.1       cgd         1: .\" Copyright (c) 1983, 1991 The Regents of the University of California.
                      2: .\" All rights reserved.
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                      4: .\" Redistribution and use in source and binary forms, with or without
                      5: .\" modification, are permitted provided that the following conditions
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                      7: .\" 1. Redistributions of source code must retain the above copyright
                      8: .\"    notice, this list of conditions and the following disclaimer.
                      9: .\" 2. Redistributions in binary form must reproduce the above copyright
                     10: .\"    notice, this list of conditions and the following disclaimer in the
                     11: .\"    documentation and/or other materials provided with the distribution.
                     12: .\" 3. All advertising materials mentioning features or use of this software
                     13: .\"    must display the following acknowledgement:
                     14: .\"    This product includes software developed by the University of
                     15: .\"    California, Berkeley and its contributors.
                     16: .\" 4. Neither the name of the University nor the names of its contributors
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                     20: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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1.2       mycroft    32: .\"     from: @(#)sigblock.2   6.7 (Berkeley) 3/10/91
1.4     ! cgd        33: .\"    $Id: sigblock.3,v 1.3 1993/12/01 18:49:54 jtc Exp $
1.1       cgd        34: .\"
                     35: .Dd March 10, 1991
1.4     ! cgd        36: .Dt SIGBLOCK 3
1.1       cgd        37: .Os BSD 4.2
                     38: .Sh NAME
                     39: .Nm sigblock
                     40: .Nd block signals
                     41: .Sh SYNOPSIS
                     42: .Fd #include <sys/signal.h>
                     43: .Ft int
                     44: .Fn sigblock "int mask"
                     45: .Ft int
                     46: .Fn sigmask signum
                     47: .Sh DESCRIPTION
                     48: .Bf -symbolic
                     49: This interface is made obsolete by:
                     50: .Ef
                     51: .Xr sigprocmask 2 .
                     52: .Pp
                     53: .Fn Sigblock
                     54: adds the signals specified in
                     55: .Fa mask
                     56: to the set of signals currently
                     57: being blocked from delivery.
                     58: Signals are blocked if the
                     59: corresponding bit in
                     60: .Fa mask
                     61: is a 1; the macro
                     62: .Fn sigmask
                     63: is provided to construct the mask for a given
                     64: .Fa signum .
                     65: .Pp
                     66: It is not possible to block
                     67: .Dv SIGKILL
                     68: or
                     69: .Dv SIGSTOP ;
                     70: this restriction is silently
                     71: imposed by the system.
                     72: .Sh RETURN VALUES
                     73: The previous set of masked signals is returned.
                     74: .Sh SEE ALSO
                     75: .Xr kill 2 ,
                     76: .Xr sigprocmask 2 ,
                     77: .Xr sigaction 2 ,
                     78: .Xr sigsetmask 2 ,
                     79: .Xr sigsetops 3
                     80: .Sh HISTORY
                     81: The
1.3       jtc        82: .Fn sigblock
1.1       cgd        83: function call appeared in
                     84: .Bx 4.2
                     85: and has been deprecated.

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