WINGs Display Manager
wdm combines the functions of a graphical display manager identifying and authenticating a user on a system with some of the functions of a session manager in selecting and starting a window manager. Optionally, wdm can shutdown (reboot or halt) the system.
wdm is a modification of XFree86's xdm package for graphically handling authentication and system login. Most of xdm has been preserved (XFree86 220.127.116.11) with the Login interface based on a WINGs. Tom Rothamel's "external greet" interface (see AUTHORS) was used to communicate wdm with wdmLogin.
In the distribution, wdm may be called through a wrapper, wdm-dynwm, which determines the available window managers using the freedesktop information and modifies the wdm-config configuration file accordingly, before launching wdm.