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Many applications have an accompanying configuration file which describes configuration options specific to that application. Similarly, plug-in modules can have configuration files. Configuration files are named with the file extension ‘.cfg’ and are typically located within the VFS virtual directory ‘/config/’ (see section Virtual File System (VFS)) which is often mounted at the physical location ‘CS/data/config’ for Crystal Space sample applications.
The format of these files is simple. They consist of a number of keys, each of which consists of a name, a value and an optional comment. Key names contain dots to create a pseudo-hierarchy, similar to a file system; for example: ‘Video.OpenGL.EnableDither’. This should be interpreted as the ‘EnableDither’ option in the sub-section ‘OpenGL.’, which resides in section ‘Video.’ (note that the dots are part of the key name).
The file itself looks something like this:
; This is the comment for the first batch of keys. Section.Keyname = Value ; Comments may be ; several lines long ; The option 'Section.TestOption' (below) has no attached comment. Video.OpenGL.EnableDither = true Section.TestOption = false ; Comments at the end of the file do not belong to any configuration ; key. When a config file is loaded and saved again later this ; end-of-file comment is retained at the end of the file.
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