main( int argc, char** argv, char** envp)
{   char*  newarg[3];
    int i; 
    newarg[0] = "cat";
    newarg[1] = "foo.txt";
    newarg[2] = "NULL"; 
    i = execve("/bin/cat", newarg, envp);
    perror ("execve() failed");
    exit
}