98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
|
/*-
|
||
|
|
* Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
|
||
|
|
*
|
||
|
|
* $Id$
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#include <signal.h>
|
||
|
|
|
||
|
|
#include "command.h"
|
||
|
|
#include "mbuf.h"
|
||
|
|
#include "log.h"
|
||
|
|
#include "sig.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);
|
||
|
|
}
|