int main (int argc, char* argv[]) {
    int i,f,exe,r;
    char* buf = malloc(1024);
    for(i=1;1<argc;i++) {
        if((f=fork()) == 0) {
            exe=execle(argv[i],NULL);
            break;
        }
    }

    if(f==0) {
        r=read(0,buf,1024);
        while(r>0 && strcmp(buf,"OK")==0) {
            alarm(3);
            pause();
            r=read(0,buf,1024);
        }
        kill(exe,SIGKILL);
        exit();
    } else {
        wait(0L);
    }

    return 0;
}