printf( "before fork\n" );
        if ( ( pid = fork() ) < 0 ) {
                fprintf( stderr, "fork error\n" );
                exit( 1 );
        } else if ( pid == 0 ) {  /* child */
                ++glob;
                ++var;
        } else
                sleep( 2 );     /* parent */
        printf( "pid = %d, glob = %d, var = %d\n",
                getpid(), glob, var );
        exit( 0 );
}