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/*-
* Copyright (c) 1997
* Brian Somers <brian@awfulhak.demon.co.uk>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: sig.c,v 1.7 1997/06/09 03:27:36 brian Exp $
*
* TODO:
*
*/
#include "sig.h"
#include <sys/types.h>
#include <signal.h>
#include "mbuf.h"
#include "log.h"
static caused[NSIG]; /* An array of pending signals */
static sig_type handler[NSIG]; /* all start at SIG_DFL */
/* Record a signal in the "caused" array */
static void
signal_recorder(int sig)
{
caused[sig - 1]++;
}
/*
* Set up signal_recorder, and record handler as the function to ultimately
* call in handle_signal()
*/
sig_type
pending_signal(int sig, sig_type fn)
{
sig_type Result;
if (sig <= 0 || sig > NSIG) {
/* Oops - we must be a bit out of date (too many sigs ?) */
LogPrintf(LogALERT, "Eeek! %s:%s: I must be out of date!\n",
__FILE__, __LINE__);
return signal(sig, fn);
}
Result = handler[sig - 1];
if (fn == SIG_DFL || fn == SIG_IGN) {
signal(sig, fn);
handler[sig - 1] = (sig_type) 0;
} else {
handler[sig - 1] = fn;
signal(sig, signal_recorder);
}
caused[sig - 1] = 0;
return Result;
}
/* Call the handlers for any pending signals */
void
handle_signals()
{
int sig;
int got;
do {
got = 0;
for (sig = 0; sig < NSIG; sig++)
if (caused[sig]) {
caused[sig]--;
got++;
(*handler[sig]) (sig + 1);
}
} while (got);
}
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