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Cream of the Crop 1
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Cream of the Crop 1.iso
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PROGRAM
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ULARN.ARJ
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ULARN.TAR
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ularn
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signal.c
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C/C++ Source or Header
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1989-10-25
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178 lines
/* signal.c */
#include "header.h"
#define BIT(a) (1<<((a)-1))
extern char savefilename[],wizard,predostuff,nosignal;
s2choose() /* text to be displayed if ^C during intro screen */
{
cursor(1,24);
lprcat("Press ");
if (boldon) setbold();
lprcat("return");
if (boldon) resetbold();
lprcat(" to continue: ");
lflush();
}
cntlc() /* what to do for a ^C */
{
if (nosignal)
return; /* don't do anything if inhibited */
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
*/
sgam()
{
savegame(savefilename);
wizard=1;
died(-257); /* hangup signal */
}
#ifdef SIGTSTP
tstop()
{
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()
*/
sigill() { sigpanic(SIGILL); }
sigtrap() { sigpanic(SIGTRAP); }
sigiot() { sigpanic(SIGIOT); }
sigemt() { sigpanic(SIGEMT); }
sigfpe() { sigpanic(SIGFPE); }
sigbus() { sigpanic(SIGBUS); }
sigsegv() { sigpanic(SIGSEGV); }
sigsys() { sigpanic(SIGSYS); }
sigpipe() { sigpanic(SIGPIPE); }
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 /* SYSV */
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
*/
sigpanic(sig)
int sig;
{
signal(sig,SIG_DFL);
fprintf(stderr,"\nUlarn - SHIT! Signal %d !!! [%s]\n",sig,signame[sig]);
fflush(stderr);
sleep(2);
sncbr();
savegame(savefilename);
kill(getpid(),sig); /* this will terminate us */
}