CLHS: Function FILE-LENGTH

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Function FILE-LENGTH

Syntax:

file-length stream => length

Arguments and Values:

stream---a stream associated with a file.

length---a non-negative integer or nil.

Description:

file-length returns the length of stream, or nil if the length cannot be determined.

For a binary file, the length is measured in units of the element type of the stream.

Examples:

     (with-open-file (s "decimal-digits.text"
                        :direction :output :if-exists :error)
       (princ "0123456789" s)
       (truename s))
    =>  #P"A:>Joe>decimal-digits.text.1"
     (with-open-file (s "decimal-digits.text")
       (file-length s))
    =>  10

Side Effects: None.

Affected By: None.

Exceptional Situations:

Should signal an error of type type-error if stream is not a stream associated with a file.

See Also:

open

Notes: None.

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