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7.2.3 Directory and File Variables and Functions

• default-directory—a variable
• file-name-directory
• file-name-nondirectory
• file-name-extension
• file-name-sans-extension
• file-name-base
• directory-file-name
• file-name-as-directory
• directory-name-p
• file-name-absolute-p
• file-relative-name
• file-name-quote
• file-name-unquote
• file-name-quoted-p
• expand-file-name
• substitute-in-file-name
• abbreviate-file-name