/*
* file: signals.c , trapping of signals from Unix. Part of DIKUMUD
* Usage : Signal Trapping.
* Copyright (C) 1990, 1991 - see 'license.doc' for complete information.
*/
#include <signal.h>
#include <stdio.h>
#include <sys/time.h>
#include "structs.h"
#include "utils.h"
#ifdef sun3
void shutdown_request(void);
void checkpointing(void);
void logsig(void);
void hupsig(void);
#else
void shutdown_request(int);
void checkpointing(int);
void logsig(int);
void hupsig(int);
#endif
void signal_setup(void)
{
struct itimerval itime;
struct timeval interval;
signal(SIGUSR2, shutdown_request);
signal(SIGHUP, hupsig);
signal(SIGPIPE, SIG_IGN);
signal(SIGINT, hupsig);
signal(SIGALRM, logsig);
signal(SIGTERM, hupsig);
/* set up the deadlock-protection */
interval.tv_sec = 900; /* 30 minutes */
interval.tv_usec = 0;
itime.it_interval = interval;
itime.it_value = interval;
setitimer(ITIMER_VIRTUAL, &itime, 0);
signal(SIGVTALRM, checkpointing);
}
#ifdef sun3
void checkpointing(void)
#else
void checkpointing(int a)
#endif
{
extern int tics;
if(!tics)
{
log("CHECKPOINT shutdown: tics not updated");
log("SHUTDOWN:now");
abort(0);
close_sockets(0);
close_whod();
exit(52);
}
else
tics = 0;
}
#ifdef sun3
void shutdown_request(void)
#else
void shutdown_request(int a)
#endif
{
log("Received USR2 - shutdown request");
close_sockets(0);
close_whod();
exit(52);
}
#ifdef sun3
void hupsig(void)
#else
void hupsig(int a)
#endif
{
extern int diku_shutdown;
log("Received SIGHUP, SIGINT, or SIGTERM. Shutting down");
exit(0); /* something more elegant should perhaps be substituted */
}
#ifdef sun3
void logsig(void)
#else
void logsig(int a)
#endif
{
log("Signal received. Ignoring.");
}
