if (gethead(&tmpbuf) == FAIL) {
Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
fprintf(stderr, "tape is not dump tape\n");
if (gethead(&tmpbuf) == FAIL) {
Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread);
fprintf(stderr, "tape is not dump tape\n");