pipe_filter_gi_write_string (f, "1 -1\n"); /* tell the child to terminate */
small_nap (); /* let the child terminate */
rc = pipe_filter_gi_write (f, " ", 1); /* write to a closed pipe */
pipe_filter_gi_write_string (f, "1 -1\n"); /* tell the child to terminate */
small_nap (); /* let the child terminate */
rc = pipe_filter_gi_write (f, " ", 1); /* write to a closed pipe */