LFS_LOGLENGTH
for (i = lfs_lognum; i != (lfs_lognum - 1) % LFS_LOGLENGTH;
i = (i + 1) % LFS_LOGLENGTH)
struct lfs_log_entry lfs_log[LFS_LOGLENGTH];
extern struct lfs_log_entry lfs_log[LFS_LOGLENGTH];
lfs_lognum = (lfs_lognum + 1) % LFS_LOGLENGTH; \