24.13 Special Folders

On Microsoft Windows and Mac OS X there are various special folders used for application data and user data. Here are some examples of the folder for application data which is shared between all users.

Windows Vista:

C:\ProgramData

Windows XP:

C:\Documents and Settings\All Users.WINDOWS\Application Data

Windows 2000:

C:\Documents and Settings\All Users\Application Data

Mac OS X:

/Library/Application Support

The locations and folder names can differ between versions of the operating system, therefore it is useful to have a system-independent way to get the path at runtime. The function system:get-folder-path can be used to retrieve the path to special folders. Directory pathnames corresponding to each of the examples above can be obtained by calling:

Here is another example of differences between operating systems. On Windows Vista:

(sys:get-folder-path :my-documents)

=>

#P"C:/Users/dubya/Documents/"

On Windows 98 SE:

(sys:get-folder-path :my-documents)

=>

#P"C:/My Documents/"

On Mac OS X:

(sys:get-folder-path :my-documents)

=>

#P"/u/ldisk/dubya/Documents/"

See the LispWorks Reference Manual for more details of sys:get-folder-path .

On Windows NT-based systems there is a profile folder for each user. You can find the profile path for the current user with the function sys:get-user-profile-directory . See the LispWorks Reference Manual for more details.