is a variable defined in `
Its value is
Default locking mode of Emacs-Locked buffers.
Its value is used as the default for `emacs-lock-mode' (which
see) the first time that Emacs Lock mode is turned on in a buffer
without passing an explicit locking mode.
Possible values are:
exit -- Emacs cannot exit while the buffer is locked
kill -- the buffer cannot be killed, but Emacs can exit as usual
all -- the buffer is locked against both actions
nil -- the buffer is not locked
You can customize this variable.
This variable was introduced, or its default value was changed, in
version 24.1 of Emacs.