/usr/ is in libsaga-dev 2.3.1+dfsg-3build7.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/saga_api/
/usr/include/saga_api/api_core.h
/usr/include/saga_api/compatibility.h
/usr/include/saga_api/data_manager.h
/usr/include/saga_api/dataobject.h
/usr/include/saga_api/datetime.h
/usr/include/saga_api/geo_tools.h
/usr/include/saga_api/grid.h
/usr/include/saga_api/grid_pyramid.h
/usr/include/saga_api/mat_tools.h
/usr/include/saga_api/metadata.h
/usr/include/saga_api/module.h
/usr/include/saga_api/module_chain.h
/usr/include/saga_api/module_library.h
/usr/include/saga_api/parameters.h
/usr/include/saga_api/pointcloud.h
/usr/include/saga_api/saga_api.h
/usr/include/saga_api/shapes.h
/usr/include/saga_api/table.h
/usr/include/saga_api/table_dbase.h
/usr/include/saga_api/table_value.h
/usr/include/saga_api/tin.h
/usr/include/saga_gdi/
/usr/include/saga_gdi/3d_view.h
/usr/include/saga_gdi/3d_view_tools.h
/usr/include/saga_gdi/saga_gdi.h
/usr/include/saga_gdi/sgdi_core.h
/usr/include/saga_gdi/sgdi_diagram.h
/usr/include/saga_gdi/sgdi_dialog.h
/usr/include/saga_gdi/sgdi_helper.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/share/
/usr/share/doc/
/usr/share/doc/libsaga-dev/
/usr/share/doc/libsaga-dev/copyright
/usr/lib/x86_64-linux-gnu/libsaga_api.so
/usr/lib/x86_64-linux-gnu/libsaga_gdi.so
/usr/share/doc/libsaga-dev/changelog.Debian.gz