/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/ is in libcnoid-dev 1.1.0+dfsg-6.1+b4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/BodyBar.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/BodyItem.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/BodyMotionItem.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/KinematicFaultChecker.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/KinematicsBar.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/LinkSelectionView.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/LinkTreeWidget.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/SceneBody.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/SceneBodyManager.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/SceneWorld.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/SimulatorItem.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/WorldItem.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/exportdecl.h
/usr/include/choreonoid-1.1/cnoid/src/BodyPlugin/gettext.h