/usr/share/ftools/fv/ is in ftools-fv 5.4+dfsg-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ftools/fv/class/
/usr/share/ftools/fv/class/CubeImage.tcl
/usr/share/ftools/fv/class/FVFile.tcl
/usr/share/ftools/fv/class/FVFtool.tcl
/usr/share/ftools/fv/class/FVSkyview.tcl
/usr/share/ftools/fv/class/FVVizier.tcl
/usr/share/ftools/fv/class/FitsBaseCalculator.tcl
/usr/share/ftools/fv/class/FitsCalculator.tcl
/usr/share/ftools/fv/class/FitsClipBoard.tcl
/usr/share/ftools/fv/class/FitsDelCalculator.tcl
/usr/share/ftools/fv/class/FitsExtension.tcl
/usr/share/ftools/fv/class/FitsFile.tcl
/usr/share/ftools/fv/class/FitsFileSelection.tcl
/usr/share/ftools/fv/class/FitsHeader.tcl
/usr/share/ftools/fv/class/FitsHistoParam.tcl
/usr/share/ftools/fv/class/FitsImage.tcl
/usr/share/ftools/fv/class/FitsImgPlotSel.tcl
/usr/share/ftools/fv/class/FitsPlotSel.tcl
/usr/share/ftools/fv/class/FitsSelCalculator.tcl
/usr/share/ftools/fv/class/FitsTable.tcl
/usr/share/ftools/fv/class/NewExtension.tcl
/usr/share/ftools/fv/class/NewFITS.tcl
/usr/share/ftools/fv/class/NewImage.tcl
/usr/share/ftools/fv/class/NewTable.tcl
/usr/share/ftools/fv/class/RemoteAccess.tcl
/usr/share/ftools/fv/class/Table.tcl
/usr/share/ftools/fv/class/VectorTable.tcl
/usr/share/ftools/fv/class/WFPC2Image.tcl
/usr/share/ftools/fv/class/XPA_access.tcl
/usr/share/ftools/fv/class/fedit.tcl
/usr/share/ftools/fv/class/ftp_lib.tcl
/usr/share/ftools/fv/class/fvApp.tcl
/usr/share/ftools/fv/class/fvMacResource.r
/usr/share/ftools/fv/class/fvPreferences.tcl
/usr/share/ftools/fv/class/fvWinKeeper.tcl
/usr/share/ftools/fv/class/tclIndex
/usr/share/ftools/fv/class/tclIndex.mac
/usr/share/ftools/fv/fvInit.tcl