mirror of
https://git.FreeBSD.org/src.git
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149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
#include <signal.h>
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#include "header.h" /* "Larn is copyrighted 1986 by Noah Morgan.\n" */
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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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static void sigill() { sigpanic(SIGILL); }
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static void sigtrap() { sigpanic(SIGTRAP); }
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static void sigiot() { sigpanic(SIGIOT); }
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static void sigemt() { sigpanic(SIGEMT); }
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static void sigfpe() { sigpanic(SIGFPE); }
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static void sigbus() { sigpanic(SIGBUS); }
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static void sigsegv() { sigpanic(SIGSEGV); }
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static void sigsys() { sigpanic(SIGSYS); }
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static void sigpipe() { sigpanic(SIGPIPE); }
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static void sigterm() { sigpanic(SIGTERM); }
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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, sigill); signal(SIGTRAP, sigtrap);
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signal(SIGIOT, sigiot); signal(SIGEMT, sigemt);
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signal(SIGFPE, sigfpe); signal(SIGBUS, sigbus);
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signal(SIGSEGV, sigsegv); signal(SIGSYS, sigsys);
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signal(SIGPIPE, sigpipe); signal(SIGTERM, sigterm);
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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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#ifdef BSD /* for BSD UNIX? */
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static char *signame[NSIG] = { "",
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"SIGHUP", /* 1 hangup */
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"SIGINT", /* 2 interrupt */
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"SIGQUIT", /* 3 quit */
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"SIGILL", /* 4 illegal instruction (not reset when caught) */
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"SIGTRAP", /* 5 trace trap (not reset when caught) */
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"SIGIOT", /* 6 IOT instruction */
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"SIGEMT", /* 7 EMT instruction */
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"SIGFPE", /* 8 floating point exception */
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"SIGKILL", /* 9 kill (cannot be caught or ignored) */
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"SIGBUS", /* 10 bus error */
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"SIGSEGV", /* 11 segmentation violation */
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"SIGSYS", /* 12 bad argument to system call */
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"SIGPIPE", /* 13 write on a pipe with no one to read it */
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"SIGALRM", /* 14 alarm clock */
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"SIGTERM", /* 15 software termination signal from kill */
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"SIGURG", /* 16 urgent condition on IO channel */
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"SIGSTOP", /* 17 sendable stop signal not from tty */
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"SIGTSTP", /* 18 stop signal from tty */
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"SIGCONT", /* 19 continue a stopped process */
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"SIGCHLD", /* 20 to parent on child stop or exit */
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"SIGTTIN", /* 21 to readers pgrp upon background tty read */
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"SIGTTOU", /* 22 like TTIN for output if (tp->t_local<OSTOP) */
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"SIGIO", /* 23 input/output possible signal */
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"SIGXCPU", /* 24 exceeded CPU time limit */
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"SIGXFSZ", /* 25 exceeded file size limit */
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"SIGVTALRM",/* 26 virtual time alarm */
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"SIGPROF", /* 27 profiling time alarm */
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"","","","" };
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#else BSD /* for system V? */
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static char *signame[NSIG] = { "",
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"SIGHUP", /* 1 hangup */
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"SIGINT", /* 2 interrupt */
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"SIGQUIT", /* 3 quit */
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"SIGILL", /* 4 illegal instruction (not reset when caught) */
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"SIGTRAP", /* 5 trace trap (not reset when caught) */
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"SIGIOT", /* 6 IOT instruction */
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"SIGEMT", /* 7 EMT instruction */
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"SIGFPE", /* 8 floating point exception */
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"SIGKILL", /* 9 kill (cannot be caught or ignored) */
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"SIGBUS", /* 10 bus error */
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"SIGSEGV", /* 11 segmentation violation */
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"SIGSYS", /* 12 bad argument to system call */
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"SIGPIPE", /* 13 write on a pipe with no one to read it */
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"SIGALRM", /* 14 alarm clock */
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"SIGTERM", /* 15 software termination signal from kill */
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"SIGUSR1", /* 16 user defines signal 1 */
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"SIGUSR2", /* 17 user defines signal 2 */
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"SIGCLD", /* 18 child death */
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"SIGPWR", /* 19 power fail */
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"","","","","","","","","","","","" };
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#endif BSD
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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 [%s]",sig,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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