[Emacs-diffs] Changes to dig.el

[Glenn Morris]

CVSROOT:        /sources/emacs
Module name:    emacs
Changes by:     Glenn Morris <gm>       07/12/01 20:40:30

Index: dig.el
===================================================================
RCS file: dig.el
diff -N dig.el
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ dig.el      1 Dec 2007 20:40:29 -0000       1.1
@@ -0,0 +1,193 @@
+;;; dig.el --- Domain Name System dig interface
+
+;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
+;;   2005, 2006, 2007 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 3, 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., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, 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."
+  :group 'comm)
+
+(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))
+  (gnus-run-mode-hooks 'dig-mode-hook))
+
+(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