revert-buffer is an interactive compiled Lisp function in `
It is bound to <menu-bar> <file> <revert-buffer>.
(revert-buffer &optional IGNORE-AUTO NOCONFIRM PRESERVE-MODES)
Replace current buffer text with the text of the visited file on disk.
This undoes all changes since the file was visited or saved.
With a prefix argument, offer to revert from latest auto-save file, if
that is more recent than the visited file.
This command also implements an interface for special buffers
that contain text which doesn't come from a file, but reflects
some other data instead (e.g. Dired buffers, `buffer-list'
buffers). This is done via the variable `revert-buffer-function'.
In these cases, it should reconstruct the buffer contents from the
When called from Lisp, the first argument is IGNORE-AUTO; only offer
to revert from the auto-save file when this is nil. Note that the
sense of this argument is the reverse of the prefix argument, for the
sake of backward compatibility. IGNORE-AUTO is optional, defaulting
Optional second argument NOCONFIRM means don't ask for confirmation
at all. (The variable `revert-without-query' offers another way to
revert buffers without querying for confirmation.)
Optional third argument PRESERVE-MODES non-nil means don't alter
the files modes. Normally we reinitialize them using `normal-mode'.
This function binds `revert-buffer-in-progress-p' non-nil while it operates.
This function calls the function that `revert-buffer-function' specifies
to do the work, with arguments IGNORE-AUTO and NOCONFIRM.
The default function runs the hooks `before-revert-hook' and