87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
#ifndef lint
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static char rcsid[] = "$NetBSD: signal.c,v 1.5 1995/12/21 11:27:51 mycroft Exp $";
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#endif /* not lint */
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#include <signal.h>
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#include "header.h" /* "Larn is copyrighted 1986 by Noah Morgan.\n" */
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#include <string.h>
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#define BIT(a) (1<<((a)-1))
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extern char savefilename[],wizard,predostuff,nosignal;
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static s2choose() /* text to be displayed if ^C during intro screen */
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{
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cursor(1,24); lprcat("Press "); setbold(); lprcat("return"); resetbold();
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lprcat(" to continue: "); lflush();
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}
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static void
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cntlc() /* what to do for a ^C */
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{
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if (nosignal) return; /* don't do anything if inhibited */
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signal(SIGQUIT,SIG_IGN); signal(SIGINT,SIG_IGN);
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quit(); if (predostuff==1) s2choose(); else showplayer();
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lflush();
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signal(SIGQUIT,cntlc); signal(SIGINT,cntlc);
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}
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/*
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* subroutine to save the game if a hangup signal
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*/
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static void
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sgam()
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{
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savegame(savefilename); wizard=1; died(-257); /* hangup signal */
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}
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#ifdef SIGTSTP
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static void
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tstop() /* control Y */
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{
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if (nosignal) return; /* nothing if inhibited */
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lcreat((char*)0); clearvt100(); lflush(); signal(SIGTSTP,SIG_DFL);
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#ifdef SIGVTALRM
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/* looks like BSD4.2 or higher - must clr mask for signal to take effect*/
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sigsetmask(sigblock(0)& ~BIT(SIGTSTP));
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#endif
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kill(getpid(),SIGTSTP);
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setupvt100(); signal(SIGTSTP,tstop);
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if (predostuff==1) s2choose(); else drawscreen();
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showplayer(); lflush();
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}
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#endif SIGTSTP
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/*
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* subroutine to issue the needed signal traps called from main()
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*/
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static void sigpanic();
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sigsetup()
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{
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signal(SIGQUIT, cntlc); signal(SIGINT, cntlc);
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signal(SIGKILL, SIG_IGN); signal(SIGHUP, sgam);
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signal(SIGILL, sigpanic); signal(SIGTRAP, sigpanic);
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signal(SIGIOT, sigpanic); signal(SIGEMT, sigpanic);
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signal(SIGFPE, sigpanic); signal(SIGBUS, sigpanic);
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signal(SIGSEGV, sigpanic); signal(SIGSYS, sigpanic);
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signal(SIGPIPE, sigpanic); signal(SIGTERM, sigpanic);
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#ifdef SIGTSTP
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signal(SIGTSTP,tstop); signal(SIGSTOP,tstop);
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#endif SIGTSTP
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}
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/*
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* routine to process a fatal error signal
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*/
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static void
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sigpanic(sig)
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int sig;
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{
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char buf[128];
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signal(sig,SIG_DFL);
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sprintf(buf,"\nLarn - Panic! Signal %d received [SIG%s]",sig,sys_signame[sig]);
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write(2,buf,strlen(buf)); sleep(2);
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sncbr();
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savegame(savefilename);
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kill(getpid(),sig); /* this will terminate us */
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}
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