143 lines
2.6 KiB
C
143 lines
2.6 KiB
C
/* $NetBSD: signal.c,v 1.7 2001/02/05 00:57:34 christos Exp $ */
|
|
|
|
/* "Larn is copyrighted 1986 by Noah Morgan.\n" */
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: signal.c,v 1.7 2001/02/05 00:57:34 christos Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "header.h"
|
|
#include "extern.h"
|
|
|
|
static void s2choose __P((void));
|
|
static void cntlc __P((int));
|
|
static void sgam __P((int));
|
|
static void tstop __P((int));
|
|
static void sigpanic __P((int));
|
|
|
|
#define BIT(a) (1<<((a)-1))
|
|
|
|
static void
|
|
s2choose()
|
|
{ /* text to be displayed if ^C during intro
|
|
* screen */
|
|
cursor(1, 24);
|
|
lprcat("Press ");
|
|
setbold();
|
|
lprcat("return");
|
|
resetbold();
|
|
lprcat(" to continue: ");
|
|
lflush();
|
|
}
|
|
|
|
static void
|
|
cntlc(n)
|
|
int n;
|
|
{ /* what to do for a ^C */
|
|
if (nosignal)
|
|
return; /* don't do anything if inhibited */
|
|
signal(SIGQUIT, SIG_IGN);
|
|
signal(SIGINT, SIG_IGN);
|
|
quit();
|
|
if (predostuff == 1)
|
|
s2choose();
|
|
else
|
|
showplayer();
|
|
lflush();
|
|
signal(SIGQUIT, cntlc);
|
|
signal(SIGINT, cntlc);
|
|
}
|
|
|
|
/*
|
|
* subroutine to save the game if a hangup signal
|
|
*/
|
|
static void
|
|
sgam(n)
|
|
int n;
|
|
{
|
|
savegame(savefilename);
|
|
wizard = 1;
|
|
died(-257); /* hangup signal */
|
|
}
|
|
|
|
#ifdef SIGTSTP
|
|
static void
|
|
tstop(n)
|
|
int n;
|
|
{ /* control Y */
|
|
if (nosignal)
|
|
return; /* nothing if inhibited */
|
|
lcreat((char *) 0);
|
|
clearvt100();
|
|
lflush();
|
|
signal(SIGTSTP, SIG_DFL);
|
|
#ifdef SIGVTALRM
|
|
/*
|
|
* looks like BSD4.2 or higher - must clr mask for signal to take
|
|
* effect
|
|
*/
|
|
sigsetmask(sigblock(0) & ~BIT(SIGTSTP));
|
|
#endif
|
|
kill(getpid(), SIGTSTP);
|
|
|
|
setupvt100();
|
|
signal(SIGTSTP, tstop);
|
|
if (predostuff == 1)
|
|
s2choose();
|
|
else
|
|
drawscreen();
|
|
showplayer();
|
|
lflush();
|
|
}
|
|
#endif /* SIGTSTP */
|
|
|
|
/*
|
|
* subroutine to issue the needed signal traps called from main()
|
|
*/
|
|
void
|
|
sigsetup()
|
|
{
|
|
signal(SIGQUIT, cntlc);
|
|
signal(SIGINT, cntlc);
|
|
signal(SIGKILL, SIG_IGN);
|
|
signal(SIGHUP, sgam);
|
|
signal(SIGILL, sigpanic);
|
|
signal(SIGTRAP, sigpanic);
|
|
signal(SIGIOT, sigpanic);
|
|
signal(SIGEMT, sigpanic);
|
|
signal(SIGFPE, sigpanic);
|
|
signal(SIGBUS, sigpanic);
|
|
signal(SIGSEGV, sigpanic);
|
|
signal(SIGSYS, sigpanic);
|
|
signal(SIGPIPE, sigpanic);
|
|
signal(SIGTERM, sigpanic);
|
|
#ifdef SIGTSTP
|
|
signal(SIGTSTP, tstop);
|
|
signal(SIGSTOP, tstop);
|
|
#endif /* SIGTSTP */
|
|
}
|
|
|
|
/*
|
|
* routine to process a fatal error signal
|
|
*/
|
|
static void
|
|
sigpanic(sig)
|
|
int sig;
|
|
{
|
|
char buf[128];
|
|
signal(sig, SIG_DFL);
|
|
snprintf(buf, sizeof(buf),
|
|
"\nLarn - Panic! Signal %d received [SIG%s]", sig,
|
|
sys_signame[sig]);
|
|
write(2, buf, strlen(buf));
|
|
sleep(2);
|
|
sncbr();
|
|
savegame(savefilename);
|
|
kill(getpid(), sig); /* this will terminate us */
|
|
}
|