/usr/share/xsessions/dwm.desktop is in dwm 6.1-4.
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 | [Desktop Entry]
Encoding=UTF-8
Name=Dwm
Comment=Dynamic window manager
Exec=dwm
Icon=dwm
Type=XSession
|