insert-file-contents-literally

insert-file-contents-literally is a compiled Lisp function in `files.el'.

(insert-file-contents-literally FILENAME &optional VISIT BEG END REPLACE)

Like `insert-file-contents', but only reads in the file literally.
A buffer may be modified in several ways after reading into the buffer,
to Emacs features such as format decoding, character code
conversion, `find-file-hook', automatic uncompression, etc.

This function ensures that none of these modifications will take place.