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/*
* cleanup.c - Cleanup and shutdown framework.
*
* Copyright 2004 Jonathan McDowell <noodles@earth.li>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <signal.h>
#include <stdbool.h>
#include "cleanup.h"
#include "log.h"
static bool should_cleanup = false;
/*
* trytocleanup - say we should try to cleanup.
*
* This function sets the cleanup flag indicating we want to try and
* cleanup ASAP.
*/
void trytocleanup(void)
{
logthing(LOGTHING_INFO, "Setting cleanup flag.");
should_cleanup = true;
return;
}
/*
* cleanup - indicate if we should try to cleanup.
*
* This function returns a bool which indicates if we want to cleanup and
* exit ASAP.
*/
bool cleanup(void)
{
return(should_cleanup);
}
/**
* sig_cleanup - set the cleanup flag when we receive a signal
*
* This is our signal handler; all it does it log the fact we got a signal
* and set the cleanup flag.
*/
void sig_cleanup(int signal)
{
logthing(LOGTHING_INFO, "Got signal %d.", signal);
trytocleanup();
return;
}
/**
* catchsignals - Register signal handlers for various signals.
*
* This function registers a signal handler for various signals (PIPE,
* ALRM, INT, TERM, HUP) that sets the cleanup flag so we try to exit
* ASAP, but cleanly.
*/
void catchsignals(void)
{
logthing(LOGTHING_INFO, "Catching signals");
signal(SIGALRM, &sig_cleanup);
signal(SIGPIPE, &sig_cleanup);
signal(SIGTERM, &sig_cleanup);
signal(SIGINT, &sig_cleanup);
signal(SIGHUP, &sig_cleanup);
return;
}
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