Identify unsafe combinations of Bcc and encryption

[gnus] / lisp / dns-mode.el

diff --git a/lisp/dns-mode.el b/lisp/dns-mode.el
index 084d50a..4862d45 100644 (file)
--- a/lisp/dns-mode.el
+++ b/lisp/dns-mode.el
@@ -1,8 +1,9 @@
 ;;; dns-mode.el --- a mode for viewing/editing Domain Name System master files
-;; Copyright (c) 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
+
+;; Copyright (C) 2000-2001, 2004-2015 Free Software Foundation, Inc.
 
 ;; Author: Simon Josefsson <simon@josefsson.org>
-;; Keywords: DNS master zone file SOA
+;; Keywords: DNS master zone file SOA comm
 
 ;; This file is part of GNU Emacs.
 
@@ -26,11 +27,6 @@
 ;; C-c C-s  Increment SOA serial.
 ;;          Understands YYYYMMDDNN, Unix time, and serial number formats,
 ;;          and complains if it fail to find SOA serial.
-;;
-;; Put something similar to the following in your ~/.emacs to use this file:
-;;
-;; (load "~/path/to/dns-mode.el")
-;; (setq auto-mode-alist (cons '("\\.soa\\'" . dns-mode) auto-mode-alist))
 
 ;;; References:
 
@@ -47,7 +43,7 @@
 
 (defgroup dns-mode nil
   "DNS master file mode configuration."
-  :group 'comm)
+  :group 'data)
 
 (defconst dns-mode-classes '("IN" "CS" "CH" "HS")
   "List of strings with known DNS classes.")
@@ -87,6 +83,18 @@
   :type 'sexp
   :group 'dns-mode)
 
+(defcustom dns-mode-soa-auto-increment-serial t
+  "Whether to increment the SOA serial number automatically.
+
+If this variable is t, the serial number is incremented upon each save of
+the file.  If it is `ask', Emacs asks for confirmation whether it should
+increment the serial upon saving.  If nil, serials must be incremented
+manually with \\[dns-mode-soa-increment-serial]."
+  :type '(choice (const :tag "Always" t)
+                (const :tag "Ask" ask)
+                (const :tag "Never" nil))
+  :group 'dns-mode)
+
 ;; Syntax table.
 
 (defvar dns-mode-syntax-table
@@ -132,8 +140,12 @@ Turning on DNS mode runs `dns-mode-hook'."
   (unless (featurep 'xemacs)
     (set (make-local-variable 'font-lock-defaults)
         '(dns-mode-font-lock-keywords nil nil ((?_ . "w")))))
+  (add-hook 'before-save-hook 'dns-mode-soa-maybe-increment-serial
+           nil t)
   (easy-menu-add dns-mode-menu dns-mode-map))
 
+;;;###autoload (defalias 'zone-mode 'dns-mode)
+
 ;; Tools.
 
 ;;;###autoload
@@ -189,9 +201,21 @@ Turning on DNS mode runs `dns-mode-hook'."
              (message "Replaced old serial %s with %s" serial new))
          (error "Cannot locate serial number in SOA record"))))))
 
-;;;###autoload(add-to-list 'auto-mode-alist '("\\.soa\\'" . dns-mode))
+(defun dns-mode-soa-maybe-increment-serial ()
+  "Increment SOA serial if needed.
+
+This function is run from `before-save-hook'."
+  (when (and (buffer-modified-p)
+            dns-mode-soa-auto-increment-serial
+            (or (eq dns-mode-soa-auto-increment-serial t)
+                (y-or-n-p "Increment SOA serial? ")))
+    ;; If `dns-mode-soa-increment-serial' signals an error saving will
+    ;; fail but that probably means that the serial should be fixed to
+    ;; comply with the RFC anyway! -rfr
+    (progn (dns-mode-soa-increment-serial)
+          ;; We return nil in case this is used in write-contents-functions.
+          nil)))
 
 (provide 'dns-mode)
 
-;; arch-tag: 6a179f0a-072f-49db-8b01-37b8f23998c0
 ;;; dns-mode.el ends here