This function makes a backup of the file visited by the current
buffer, if appropriate. It is called by
saving the buffer the first time.
This buffer-local variable indicates whether this buffer’s file has
been backed up on account of this buffer. If it is non-
the backup file has been written. Otherwise, the file should be backed
up when it is next saved (if backups are enabled). This is a
kill-local-variables does not alter it.
This variable determines whether or not to make backup files. If it
nil, then SXEmacs creates a backup of each file when it is
saved for the first time—provided that
nil (see below).
The following example shows how to change the
variable only in the RMAIL buffer and not elsewhere. Setting it
nil stops SXEmacs from making backups of the RMAIL file,
which may save disk space. (You would put this code in your
(add-hook 'rmail-mode-hook (function (lambda () (make-local-variable 'make-backup-files) (setq make-backup-files nil))))
This variable’s value is a function to be called on certain occasions to
decide whether a file should have backup files. The function receives
one argument, a file name to consider. If the function returns
nil, backups are disabled for that file. Otherwise, the other
variables in this section say whether and how to make backups.
The default value is this:
(lambda (name) (or (< (length name) 5) (not (string-equal "/tmp/" (substring name 0 5)))))
If this variable is non-
nil, backups are inhibited. It records
the result of testing
backup-enable-predicate on the visited file
name. It can also coherently be used by other mechanisms that inhibit
backups based on which file is visited. For example, VC sets this
nil to prevent making backups for files managed
with a version control system.
This is a permanent local, so that changing the major mode does not lose
its value. Major modes should not set this variable—they should set