1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997 - 1999, 2001 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <signal.h>
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#include "log.h"
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#include "sig.h"
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static int caused[NSIG]; /* An array of pending signals */
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static int necessary; /* Anything set ? */
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static sig_type handler[NSIG]; /* all start at SIG_DFL */
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/*
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* Record a signal in the "caused" array
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*
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* This function is the only thing actually called in signal context. It
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* records that a signal has been caused and that sig_Handle() should be
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* called (in non-signal context) as soon as possible to process that
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* signal.
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*/
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static void
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signal_recorder(int sig)
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{
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caused[sig - 1]++;
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necessary = 1;
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}
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/*
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* Set up signal_recorder to handle the given sig and record ``fn'' as
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* the function to ultimately call in sig_Handle(). ``fn'' will not be
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* called in signal context (as sig_Handle() is not called in signal
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* context).
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*/
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sig_type
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sig_signal(int sig, sig_type fn)
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{
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sig_type Result;
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if (sig <= 0 || sig > NSIG) {
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/* Oops - we must be a bit out of date (too many sigs ?) */
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log_Printf(LogALERT, "Eeek! %s:%d: I must be out of date!\n",
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__FILE__, __LINE__);
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return signal(sig, fn);
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}
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Result = handler[sig - 1];
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if (fn == SIG_DFL || fn == SIG_IGN) {
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signal(sig, fn);
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handler[sig - 1] = (sig_type) 0;
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} else {
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handler[sig - 1] = fn;
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signal(sig, signal_recorder);
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}
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caused[sig - 1] = 0;
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return Result;
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}
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/*
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* Call the handlers for any pending signals
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*
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* This function is called from a non-signal context - in fact, it's
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* called every time select() in DoLoop() returns - just in case
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* select() returned due to a signal being recorded by signal_recorder().
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*/
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int
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sig_Handle()
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{
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int sig;
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int got;
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int result;
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result = 0;
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if (necessary) {
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/* We've *probably* got something in `caused' set */
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necessary = 0;
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/* `necessary' might go back to 1 while we're in here.... */
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do {
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got = 0;
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for (sig = 0; sig < NSIG; sig++)
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if (caused[sig]) {
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caused[sig]--;
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got++;
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result++;
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(*handler[sig])(sig + 1);
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}
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} while (got);
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}
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return result;
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}
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