read_label
char *read_label;
read_label = (char *)calloc(sectsiz, 1);
if (read_label == NULL) {
bytes = read(Dev, read_label, sectsiz);
if (memcmp(disk_label, read_label, sectsiz) != 0) {
free(read_label);
free(read_label);
bytes = read(Dev, read_label, sectsiz);
if (memcmp(disk_label, read_label, sectsiz) != 0) {
free(read_label);
int read_label(int, struct dk_label *);
status = read_label(cur_file, &p_label);
status = read_label(fd, &update_label);
status = read_label(search_file, &search_label);