File-Handling Functions

(closefile-desc)

Closes an open file

(findfile filename)

Searches the AutoCAD library path for the specified file

(openfilename mode)

Opens a file for access by the AutoLISP I/O functions

(read-char[file-desc])

Returns the decimal ASCII code representing the character read from the keyboard input buffer or from an open file

(read-line[file-desc])

Reads a string from the keyboard or from an open file

(vl-directory-files [directory

patterndirectories])

Lists all files in a given directory

(vl-file-copy "source-filename"

"destination-filename" [append?])

Copies or appends the contents of one file to another file

(vl-file-delete "filename")

Deletes a file

(vl-file-directory-p "filename")

Determines if a file name refers to a directory

(vl-file-rename "old-filename"

"new-filename")

Renames a file

(vl-file-size "filename")

Determines the size of a file, in bytes

(vl-file-systime "filename")

Returns last modification time of the specified file

(vl-filename-base "filename")

Returns the name of a file, after stripping out the directory path and extension

(vl-filename-directory

"filename")

Returns the directory path of a file, after stripping out the name and extension

(vl-filename-extension

"filename")

Returns the extension from a file name, after stripping out the rest of the name

(vl-filename-mktemp

["pattern" "directory" "extension"])

Calculates a unique file name to be used for a temporary file

(write-charnum [file-desc])

Writes one character to the screen or to an open file

(write-linestring [file-desc])

Writes a string to the screen or to an open file