Environment variables

Eternity uses the following environment variables (not all of them are Doom or Eternity specific):

• DOOMWADDIR: optional directory to Doom IWADs.
• DOOMWADPATH: more advanced version of DOOMWADDIR, which uses a PATH-like syntax for multiple IWAD paths.
• ETERNITYBASE: the base/ directory where Eternity should find its main EDF and eternity.pke assets. If unspecified, it will look for base/ folder in the current working directory or from below the Eternity installation location, depending on system. It can also be set from the -base command-line parameter. Note that launchers such as the macOS Eternity launcher presets this to the correct path (which is inside the app bundle) before starting the game.
• ETERNITYUSER: the user/ directory where Eternity should find your user settings, savegames and screenshots. If unspecified, it will look for user/ folder in the current working directory or from the typical user settings location, depending on system. It can also be set from the -user command-line parameter. Note that launchers such as the macOS Eternity launcher presets this to the correct path (which is inside the hidden ~/Library/Application Support folder) before starting the game.
• HOME: Linux only, if XDG_CONFIG_HOME is not set, is the prefix for finding the user/ path. Also works as an alternative for DOOMWADDIR when looking for IWADs.
• TEXTSCREEN_FONT: optional, used by the ENDOOM display to choose font.
• XDG_CONFIG_HOME: Linux only, if set, it substitutes the HOME location for finding the user/ path.