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Annotation of 43BSDReno/lib/libc/compat-43/sigpause.2, revision 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: .\"    @(#)sigpause.2  6.5 (Berkeley) 7/1/90
        !            19: .\"
        !            20: .TH SIGPAUSE 2 "July 1, 1990"
        !            21: .UC 4
        !            22: .SH NAME
        !            23: sigpause \- atomically release blocked signals and wait for interrupt
        !            24: .SH SYNOPSIS
        !            25: .ft B
        !            26: sigpause(sigmask)
        !            27: .br
        !            28: int sigmask;
        !            29: .ft R
        !            30: .SH DESCRIPTION
        !            31: .B "This interface is made obsolete by sigsuspend(2).
        !            32: .LP
        !            33: .I Sigpause
        !            34: assigns 
        !            35: .I sigmask
        !            36: to the set of masked signals
        !            37: and then waits for a signal to arrive;
        !            38: on return the set of masked signals is restored.
        !            39: .I Sigmask
        !            40: is usually 0 to indicate that no
        !            41: signals are now to be blocked.
        !            42: .I Sigpause
        !            43: always terminates by being interrupted, returning \-1 with
        !            44: .I errno
        !            45: set to EINTR.
        !            46: .PP
        !            47: In normal usage, a signal is blocked using
        !            48: .IR sigblock (2),
        !            49: to begin a critical section, variables modified on the occurrence
        !            50: of the signal are examined to determine that there is no work
        !            51: to be done, and the process pauses awaiting work by using
        !            52: .I sigpause
        !            53: with the mask returned by
        !            54: .IR sigblock .
        !            55: .SH SEE ALSO
        !            56: sigsuspend(2), kill(2), sigaction(2), sigprocmask(2),
        !            57: sigblock(2), sigvec(2)

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