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[Emacs-diffs] Changes to emacs/lisp/gnus/dig.el [lexbind]


From: Miles Bader
Subject: [Emacs-diffs] Changes to emacs/lisp/gnus/dig.el [lexbind]
Date: Wed, 15 Sep 2004 20:45:12 -0400

Index: emacs/lisp/gnus/dig.el
diff -c /dev/null emacs/lisp/gnus/dig.el:1.2.4.1
*** /dev/null   Thu Sep 16 00:12:40 2004
--- emacs/lisp/gnus/dig.el      Thu Sep 16 00:12:15 2004
***************
*** 0 ****
--- 1,189 ----
+ ;;; dig.el --- Domain Name System dig interface
+ ;; Copyright (c) 2000, 2001, 2003 Free Software Foundation, Inc.
+ 
+ ;; Author: Simon Josefsson <address@hidden>
+ ;; Keywords: DNS BIND dig
+ 
+ ;; This file is part of GNU Emacs.
+ 
+ ;; GNU Emacs is free software; you can redistribute it and/or modify
+ ;; it under the terms of the GNU General Public License as published
+ ;; by the Free Software Foundation; either version 2, or (at your
+ ;; option) any later version.
+ 
+ ;; GNU Emacs is distributed in the hope that it will be useful, but
+ ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ ;; General Public License for more details.
+ 
+ ;; You should have received a copy of the GNU General Public License
+ ;; along with GNU Emacs; see the file COPYING.  If not, write to the
+ ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, USA.
+ 
+ ;;; Commentary:
+ 
+ ;; This provide an interface for "dig".
+ ;;
+ ;; For interactive use, try M-x dig and type a hostname.  Use `q' to quit
+ ;; dig buffer.
+ ;;
+ ;; For use in elisp programs, call `dig-invoke' and use
+ ;; `dig-extract-rr' to extract resource records.
+ 
+ ;;; Release history:
+ 
+ ;; 2000-10-28  posted on gnu.emacs.sources
+ 
+ ;;; Code:
+ 
+ (eval-when-compile (require 'cl))
+ 
+ (defgroup dig nil
+   "Dig configuration.")
+ 
+ (defcustom dig-program "dig"
+   "Name of dig (domain information groper) binary."
+   :type 'file
+   :group 'dig)
+ 
+ (defcustom dig-dns-server nil
+   "DNS server to query.
+ If nil, use system defaults."
+   :type '(choice (const :tag "System defaults")
+                string)
+   :group 'dig)
+ 
+ (defcustom dig-font-lock-keywords
+   '(("^;; [A-Z]+ SECTION:" 0 font-lock-keyword-face)
+     ("^;;.*" 0 font-lock-comment-face)
+     ("^; <<>>.*" 0 font-lock-type-face)
+     ("^;.*" 0 font-lock-function-name-face))
+   "Default expressions to highlight in dig mode."
+   :type 'sexp
+   :group 'dig)
+ 
+ (defun dig-invoke (domain &optional
+                         query-type query-class query-option
+                         dig-option server)
+   "Call dig with given arguments and return buffer containing output.
+ DOMAIN is a string with a DNS domain. QUERY-TYPE is an optional string
+ with a DNS type. QUERY-CLASS is an optional string with a DNS class.
+ QUERY-OPTION is an optional string with dig \"query options\".
+ DIG-OPTIONS is an optional string with parameters for the dig program.
+ SERVER is an optional string with a domain name server to query.
+ 
+ Dig is an external program found in the BIND name server distribution,
+ and is a commonly available debugging tool."
+   (let (buf cmdline)
+     (setq buf (generate-new-buffer "*dig output*"))
+     (if dig-option (push dig-option cmdline))
+     (if query-option (push query-option cmdline))
+     (if query-class (push query-class cmdline))
+     (if query-type (push query-type cmdline))
+     (push domain cmdline)
+     (if server (push (concat "@" server) cmdline)
+       (if dig-dns-server (push (concat "@" dig-dns-server) cmdline)))
+     (apply 'call-process dig-program nil buf nil cmdline)
+     buf))
+ 
+ (defun dig-extract-rr (domain &optional type class)
+   "Extract resource records for DOMAIN, TYPE and CLASS from buffer.
+ Buffer should contain output generated by `dig-invoke'."
+   (save-excursion
+     (goto-char (point-min))
+     (if (re-search-forward
+        (concat domain "\\.?[\t ]+[0-9wWdDhHmMsS]+[\t ]+"
+                (upcase (or class "IN")) "[\t ]+" (upcase (or type "A")))
+        nil t)
+       (let (b e)
+         (end-of-line)
+         (setq e (point))
+         (beginning-of-line)
+         (setq b (point))
+         (when (search-forward " (" e t)
+           (search-forward " )"))
+         (end-of-line)
+         (setq e (point))
+         (buffer-substring b e))
+       (and (re-search-forward (concat domain "\\.?[\t ]+[0-9wWdDhHmMsS]+[\t 
]+"
+                                     (upcase (or class "IN"))
+                                     "[\t ]+CNAME[\t ]+\\(.*\\)$") nil t)
+          (dig-extract-rr (match-string 1) type class)))))
+ 
+ (defun dig-rr-get-pkix-cert (rr)
+   (let (b e str)
+     (string-match "[^\t ]+[\t ]+[0-9wWdDhHmMsS]+[\t ]+IN[\t ]+CERT[\t 
]+\\(1\\|PKIX\\)[\t ]+[0-9]+[\t ]+[0-9]+[\t ]+(?" rr)
+     (setq b (match-end 0))
+     (string-match ")" rr)
+     (setq e (match-beginning 0))
+     (setq str (substring rr b e))
+     (while (string-match "[\t \n\r]" str)
+       (setq str (replace-match "" nil nil str)))
+     str))
+ 
+ ;; XEmacs does it like this.  For Emacs, we have to set the
+ ;; `font-lock-defaults' buffer-local variable.
+ (put 'dig-mode 'font-lock-defaults '(dig-font-lock-keywords t))
+ 
+ (put 'dig-mode 'mode-class 'special)
+ 
+ (defvar dig-mode-map nil)
+ (unless dig-mode-map
+   (setq dig-mode-map (make-sparse-keymap))
+   (suppress-keymap dig-mode-map)
+ 
+   (define-key dig-mode-map "q" 'dig-exit))
+ 
+ (defun dig-mode ()
+   "Major mode for displaying dig output."
+   (interactive)
+   (kill-all-local-variables)
+   (setq mode-name "dig")
+   (setq major-mode 'dig-mode)
+   (use-local-map dig-mode-map)
+   (buffer-disable-undo)
+   (unless (featurep 'xemacs)
+     (set (make-local-variable 'font-lock-defaults)
+        '(dig-font-lock-keywords t)))
+   (when (featurep 'font-lock)
+     (font-lock-set-defaults)))
+ 
+ (defun dig-exit ()
+   "Quit dig output buffer."
+   (interactive)
+   (kill-buffer (current-buffer)))
+ 
+ (defun dig (domain &optional
+                  query-type query-class query-option dig-option server)
+   "Query addresses of a DOMAIN using dig, by calling `dig-invoke'.
+ Optional arguments are passed to `dig-invoke'."
+   (interactive "sHost: ")
+   (switch-to-buffer
+    (dig-invoke domain query-type query-class query-option dig-option server))
+   (goto-char (point-min))
+   (and (search-forward ";; ANSWER SECTION:" nil t)
+        (forward-line))
+   (dig-mode)
+   (setq buffer-read-only t)
+   (set-buffer-modified-p nil))
+ 
+ ;; named for consistency with query-dns in dns.el
+ (defun query-dig (domain &optional
+                        query-type query-class query-option dig-option server)
+   "Query addresses of a DOMAIN using dig.
+ It works by calling `dig-invoke' and `dig-extract-rr'.  Optional
+ arguments are passed to `dig-invoke' and `dig-extract-rr'.  Returns
+ nil for domain/class/type queries that results in no data."
+ (let ((buffer (dig-invoke domain query-type query-class
+                         query-option dig-option server)))
+   (when buffer
+     (switch-to-buffer buffer)
+     (let ((digger (dig-extract-rr domain query-type query-class)))
+       (kill-buffer buffer)
+       digger))))
+ 
+ (provide 'dig)
+ 
+ ;;; arch-tag: 1d61726e-9400-4013-9ae7-4035e0c7f7d6
+ ;;; dig.el ends here




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