/usr/share/ is in xfslibs-dev 4.9.0+nmu1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/man/man3/xfsctl.3.gz
/usr/share/doc/
/usr/share/doc/xfslibs-dev/
/usr/share/doc/xfslibs-dev/copyright
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/path_to_handle.3.gz
/usr/share/doc/xfslibs-dev/changelog.Debian.gz
/usr/share/man/man3/attr_list_by_handle.3.gz
/usr/share/man/man3/attr_multi_by_handle.3.gz
/usr/share/man/man3/fd_to_handle.3.gz
/usr/share/man/man3/free_handle.3.gz
/usr/share/man/man3/fssetdm_by_handle.3.gz
/usr/share/man/man3/getparentpaths_by_handle.3.gz
/usr/share/man/man3/getparents_by_handle.3.gz
/usr/share/man/man3/handle_to_fshandle.3.gz
/usr/share/man/man3/open_by_handle.3.gz
/usr/share/man/man3/path_to_fshandle.3.gz
/usr/share/man/man3/readlink_by_handle.3.gz