mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
#include <signal.h>
|
|
#include "header.h" /* "Larn is copyrighted 1986 by Noah Morgan.\n" */
|
|
#define BIT(a) (1<<((a)-1))
|
|
extern char savefilename[],wizard,predostuff,nosignal;
|
|
static 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() /* 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()
|
|
{
|
|
savegame(savefilename); wizard=1; died(-257); /* hangup signal */
|
|
}
|
|
|
|
#ifdef SIGTSTP
|
|
static void
|
|
tstop() /* 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()
|
|
*/
|
|
static void sigpanic();
|
|
static void sigill() { sigpanic(SIGILL); }
|
|
static void sigtrap() { sigpanic(SIGTRAP); }
|
|
static void sigiot() { sigpanic(SIGIOT); }
|
|
static void sigemt() { sigpanic(SIGEMT); }
|
|
static void sigfpe() { sigpanic(SIGFPE); }
|
|
static void sigbus() { sigpanic(SIGBUS); }
|
|
static void sigsegv() { sigpanic(SIGSEGV); }
|
|
static void sigsys() { sigpanic(SIGSYS); }
|
|
static void sigpipe() { sigpanic(SIGPIPE); }
|
|
static void sigterm() { sigpanic(SIGTERM); }
|
|
sigsetup()
|
|
{
|
|
signal(SIGQUIT, cntlc); signal(SIGINT, cntlc);
|
|
signal(SIGKILL, SIG_IGN); signal(SIGHUP, sgam);
|
|
signal(SIGILL, sigill); signal(SIGTRAP, sigtrap);
|
|
signal(SIGIOT, sigiot); signal(SIGEMT, sigemt);
|
|
signal(SIGFPE, sigfpe); signal(SIGBUS, sigbus);
|
|
signal(SIGSEGV, sigsegv); signal(SIGSYS, sigsys);
|
|
signal(SIGPIPE, sigpipe); signal(SIGTERM, sigterm);
|
|
#ifdef SIGTSTP
|
|
signal(SIGTSTP,tstop); signal(SIGSTOP,tstop);
|
|
#endif SIGTSTP
|
|
}
|
|
|
|
#ifdef BSD /* for BSD UNIX? */
|
|
|
|
static char *signame[NSIG] = { "",
|
|
"SIGHUP", /* 1 hangup */
|
|
"SIGINT", /* 2 interrupt */
|
|
"SIGQUIT", /* 3 quit */
|
|
"SIGILL", /* 4 illegal instruction (not reset when caught) */
|
|
"SIGTRAP", /* 5 trace trap (not reset when caught) */
|
|
"SIGIOT", /* 6 IOT instruction */
|
|
"SIGEMT", /* 7 EMT instruction */
|
|
"SIGFPE", /* 8 floating point exception */
|
|
"SIGKILL", /* 9 kill (cannot be caught or ignored) */
|
|
"SIGBUS", /* 10 bus error */
|
|
"SIGSEGV", /* 11 segmentation violation */
|
|
"SIGSYS", /* 12 bad argument to system call */
|
|
"SIGPIPE", /* 13 write on a pipe with no one to read it */
|
|
"SIGALRM", /* 14 alarm clock */
|
|
"SIGTERM", /* 15 software termination signal from kill */
|
|
"SIGURG", /* 16 urgent condition on IO channel */
|
|
"SIGSTOP", /* 17 sendable stop signal not from tty */
|
|
"SIGTSTP", /* 18 stop signal from tty */
|
|
"SIGCONT", /* 19 continue a stopped process */
|
|
"SIGCHLD", /* 20 to parent on child stop or exit */
|
|
"SIGTTIN", /* 21 to readers pgrp upon background tty read */
|
|
"SIGTTOU", /* 22 like TTIN for output if (tp->t_local<OSTOP) */
|
|
"SIGIO", /* 23 input/output possible signal */
|
|
"SIGXCPU", /* 24 exceeded CPU time limit */
|
|
"SIGXFSZ", /* 25 exceeded file size limit */
|
|
"SIGVTALRM",/* 26 virtual time alarm */
|
|
"SIGPROF", /* 27 profiling time alarm */
|
|
"","","","" };
|
|
|
|
#else BSD /* for system V? */
|
|
|
|
static char *signame[NSIG] = { "",
|
|
"SIGHUP", /* 1 hangup */
|
|
"SIGINT", /* 2 interrupt */
|
|
"SIGQUIT", /* 3 quit */
|
|
"SIGILL", /* 4 illegal instruction (not reset when caught) */
|
|
"SIGTRAP", /* 5 trace trap (not reset when caught) */
|
|
"SIGIOT", /* 6 IOT instruction */
|
|
"SIGEMT", /* 7 EMT instruction */
|
|
"SIGFPE", /* 8 floating point exception */
|
|
"SIGKILL", /* 9 kill (cannot be caught or ignored) */
|
|
"SIGBUS", /* 10 bus error */
|
|
"SIGSEGV", /* 11 segmentation violation */
|
|
"SIGSYS", /* 12 bad argument to system call */
|
|
"SIGPIPE", /* 13 write on a pipe with no one to read it */
|
|
"SIGALRM", /* 14 alarm clock */
|
|
"SIGTERM", /* 15 software termination signal from kill */
|
|
"SIGUSR1", /* 16 user defines signal 1 */
|
|
"SIGUSR2", /* 17 user defines signal 2 */
|
|
"SIGCLD", /* 18 child death */
|
|
"SIGPWR", /* 19 power fail */
|
|
"","","","","","","","","","","","" };
|
|
|
|
#endif BSD
|
|
|
|
/*
|
|
* routine to process a fatal error signal
|
|
*/
|
|
static void
|
|
sigpanic(sig)
|
|
int sig;
|
|
{
|
|
char buf[128];
|
|
signal(sig,SIG_DFL);
|
|
sprintf(buf,"\nLarn - Panic! Signal %d received [%s]",sig,signame[sig]);
|
|
write(2,buf,strlen(buf)); sleep(2);
|
|
sncbr();
|
|
savegame(savefilename);
|
|
kill(getpid(),sig); /* this will terminate us */
|
|
}
|