/usr/include/pcl-1.7/pcl/keypoints/ is in libpcl-dev 1.7.2-7.
This file is owned by root:root, with mode 0o755.
..
/usr/include/pcl-1.7/pcl/keypoints/agast_2d.h
/usr/include/pcl-1.7/pcl/keypoints/harris_3d.h
/usr/include/pcl-1.7/pcl/keypoints/harris_6d.h
/usr/include/pcl-1.7/pcl/keypoints/impl/
/usr/include/pcl-1.7/pcl/keypoints/impl/agast_2d.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/harris_3d.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/harris_6d.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/iss_3d.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/keypoint.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/sift_keypoint.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/smoothed_surfaces_keypoint.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/susan.hpp
/usr/include/pcl-1.7/pcl/keypoints/impl/uniform_sampling.hpp
/usr/include/pcl-1.7/pcl/keypoints/iss_3d.h
/usr/include/pcl-1.7/pcl/keypoints/keypoint.h
/usr/include/pcl-1.7/pcl/keypoints/narf_keypoint.h
/usr/include/pcl-1.7/pcl/keypoints/sift_keypoint.h
/usr/include/pcl-1.7/pcl/keypoints/smoothed_surfaces_keypoint.h
/usr/include/pcl-1.7/pcl/keypoints/susan.h
/usr/include/pcl-1.7/pcl/keypoints/uniform_sampling.h