/usr/share/xsessions/fvwm.desktop is in fvwm 1:2.6.5.ds-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ## /etc/dm/Sessions/Fvwm.desktop ##
[Desktop Entry]
Name=Fvwm
Comment=Fvwm
Exec=fvwm2
Keywords=wm;
Terminal=False
TryExec=fvwm2
Type=Application
[Window Manager]
SessionManaged=true
##
|