+/****************************************************************************
+ Return the 'create time' from a stat struct if it exists (birthtime) or else
+ use the best approximation.
+****************************************************************************/
+
+static void make_create_timespec(const struct stat *pst, struct stat_ex *dst,
+ bool fake_dir_create_times)
+{
+ if (S_ISDIR(pst->st_mode) && fake_dir_create_times) {
+ dst->st_ex_btime.tv_sec = 315493200L; /* 1/1/1980 */
+ dst->st_ex_btime.tv_nsec = 0;
+ }
+
+ dst->st_ex_calculated_birthtime = false;
+
+#if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC)
+ dst->st_ex_btime = pst->st_birthtimespec;
+#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
+ dst->st_ex_btime.tv_sec = pst->st_birthtime;
+ dst->st_ex_btime.tv_nsec = pst->st_birthtimenspec;
+#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME)
+ dst->st_ex_btime.tv_sec = pst->st_birthtime;
+ dst->st_ex_btime.tv_nsec = 0;
+#else
+ dst->st_ex_btime = calc_create_time_stat(pst);
+ dst->st_ex_calculated_birthtime = true;
+#endif
+
+ /* Deal with systems that don't initialize birthtime correctly.
+ * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
+ */
+ if (null_timespec(dst->st_ex_btime)) {
+ dst->st_ex_btime = calc_create_time_stat(pst);
+ dst->st_ex_calculated_birthtime = true;
+ }
+}
+
+/****************************************************************************
+ If we update a timestamp in a stat_ex struct we may have to recalculate
+ the birthtime. For now only implement this for write time, but we may
+ also need to do it for atime and ctime. JRA.
+****************************************************************************/
+
+void update_stat_ex_mtime(struct stat_ex *dst,
+ struct timespec write_ts)
+{
+ dst->st_ex_mtime = write_ts;
+
+ /* We may have to recalculate btime. */
+ if (dst->st_ex_calculated_birthtime) {
+ dst->st_ex_btime = calc_create_time_stat_ex(dst);
+ }
+}
+
+void update_stat_ex_create_time(struct stat_ex *dst,
+ struct timespec create_time)
+{
+ dst->st_ex_btime = create_time;
+ dst->st_ex_calculated_birthtime = false;
+}
+
+void init_stat_ex_from_stat (struct stat_ex *dst,
+ const struct stat *src,
+ bool fake_dir_create_times)
+{
+ dst->st_ex_dev = src->st_dev;
+ dst->st_ex_ino = src->st_ino;
+ dst->st_ex_mode = src->st_mode;
+ dst->st_ex_nlink = src->st_nlink;
+ dst->st_ex_uid = src->st_uid;
+ dst->st_ex_gid = src->st_gid;
+ dst->st_ex_rdev = src->st_rdev;
+ dst->st_ex_size = src->st_size;
+ dst->st_ex_atime = get_atimespec(src);
+ dst->st_ex_mtime = get_mtimespec(src);
+ dst->st_ex_ctime = get_ctimespec(src);
+ make_create_timespec(src, dst, fake_dir_create_times);
+#ifdef HAVE_STAT_ST_BLKSIZE
+ dst->st_ex_blksize = src->st_blksize;
+#else
+ dst->st_ex_blksize = STAT_ST_BLOCKSIZE;
+#endif
+
+#ifdef HAVE_STAT_ST_BLOCKS
+ dst->st_ex_blocks = src->st_blocks;
+#else
+ dst->st_ex_blocks = src->st_size / dst->st_ex_blksize + 1;
+#endif
+
+#ifdef HAVE_STAT_ST_FLAGS
+ dst->st_ex_flags = src->st_flags;
+#else
+ dst->st_ex_flags = 0;
+#endif
+}
+