should have filesystem type C<fstype>.
The returned integer is the status. See L<fsck(8)> for the
-list of status codes from C<fsck>, and note that multiple
-status codes can be summed together.
+list of status codes from C<fsck>.
-It is entirely equivalent to running C<fsck -a -t fstype device>.
-Note that checking or repairing NTFS volumes is not supported
+Notes:
+
+=over 4
+
+=item *
+
+Multiple status codes can be summed together.
+
+=item *
+
+A non-zero return code can mean "success", for example if
+errors have been corrected on the filesystem.
+
+=item *
+
+Checking or repairing NTFS volumes is not supported
(by linux-ntfs).
+=back
+
+This command is entirely equivalent to running C<fsck -a -t fstype device>.
+
On error this function returns -1.
=head2 guestfs_get_autosync