// *** Synnergy Networks

// * Description:
//
// Test for catching the SIGSEGV and SIGBUS without crashing
// and with setjmp()/longjmp()

// * Author:
//
// guidob (guidob@synnergy.net)
// Synnergy Networks (c) 1999, http://www.synnergy.net

// * Greets:
//
// Synnergy Networks, Hit2000 crew, Cindy

// * Comments:
//
// For more details, read the source.

// *** Synnergy Networks

#include <iostream.h>
#include <signal.h>
#include <stdlib.h>
#include <siginfo.h>
#include <setjmp.h>
#include <unistd.h>

jmp_buf env;

void notwithme(int);
int  beyond(int);

int main(){

    int i;
    int mysig;

    sigset(SIGSEGV,notwithme);
    sigset(SIGBUS,notwithme);

    if( ( mysig = setjmp(env) ) == 0 ){

            // Now it's the first time here

            for(i=10000;;i++){

                    cout << "Testing with i = " << i << endl;

                    beyond(i);
            }
    }else{

            // Now we come from signal handler

            cout << "I survived the fatal error, but still withdraw\n";
            cout << "The signal I got was: " << mysig << endl;
            sleep(1);
            return(0);

    }

    return(0);
}

int beyond(int x){

    int a[20];
    
    // Just one critical operation, which cannot workout

    a[x]=1;

    return(1);
}

void notwithme(int sig){

    longjmp(env, sig);

    // just for savety

    exit(0);
}

// EOF