/usr/include/freefoam/radiation/ is in libfreefoam-dev 0.1.0+dfsg+1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/freefoam/radiation/MarshakRadiationFixedTMixedFvPatchScalarField.H
/usr/include/freefoam/radiation/MarshakRadiationMixedFvPatchScalarField.H
/usr/include/freefoam/radiation/P1.H
/usr/include/freefoam/radiation/absorptionCoeffs.H
/usr/include/freefoam/radiation/absorptionCoeffsI.H
/usr/include/freefoam/radiation/absorptionEmissionModel.H
/usr/include/freefoam/radiation/binaryAbsorptionEmission.H
/usr/include/freefoam/radiation/blackBodyEmission.H
/usr/include/freefoam/radiation/constantAbsorptionEmission.H
/usr/include/freefoam/radiation/constantScatter.H
/usr/include/freefoam/radiation/createRadiationModel.H
/usr/include/freefoam/radiation/forceLink.C
/usr/include/freefoam/radiation/fvDOM.H
/usr/include/freefoam/radiation/fvDOMI.H
/usr/include/freefoam/radiation/greyDiffusiveRadiationMixedFvPatchScalarField.H
/usr/include/freefoam/radiation/greyMeanAbsorptionEmission.H
/usr/include/freefoam/radiation/interpolationLookUpTable.C
/usr/include/freefoam/radiation/interpolationLookUpTable.H
/usr/include/freefoam/radiation/interpolationLookUpTableI.H
/usr/include/freefoam/radiation/noAbsorptionEmission.H
/usr/include/freefoam/radiation/noRadiation.H
/usr/include/freefoam/radiation/radiationConstants.H
/usr/include/freefoam/radiation/radiationModel.H
/usr/include/freefoam/radiation/radiativeIntensityRay.H
/usr/include/freefoam/radiation/radiativeIntensityRayI.H
/usr/include/freefoam/radiation/scatterModel.H
/usr/include/freefoam/radiation/wideBandAbsorptionEmission.H
/usr/include/freefoam/radiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.H