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diff --git a/lisp/nnbabyl.el b/lisp/nnbabyl.el
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+;;; nnbabyl.el --- rmail mbox access for Gnus
+;; Copyright (C) 1995 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <[email protected]>
+;; 	Masanobu UMEDA <[email protected]>
+;; Keywords: news, mail
+
+;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;; For an overview of what the interface functions do, please see the
+;; Gnus sources.  
+
+;;; Code:
+
+(require 'nnheader)
+(require 'rmail)
+(require 'nnmail)
+
+(defvar nnbabyl-mbox-file (expand-file-name "~/RMAIL")
+  "The name of the rmail box file in the users home directory.")
+
+(defvar nnbabyl-active-file (expand-file-name "~/.rmail-active")
+  "The name of the active file for the rmail box.")
+
+(defvar nnbabyl-get-new-mail t
+  "If non-nil, nnbabyl will check the incoming mail file and split the mail.")
+
+(defvar nnbabyl-prepare-save-mail-hook nil
+  "Hook run narrowed to an article before saving.")
+
+
+
+(defvar nnbabyl-mail-delimiter "\^_")
+
+(defconst nnbabyl-version "nnbabyl 1.0"
+  "nnbabyl version.")
+
+(defvar nnbabyl-mbox-buffer nil)
+(defvar nnbabyl-current-group nil)
+(defvar nnbabyl-status-string "")
+(defvar nnbabyl-group-alist nil)
+(defvar nnbabyl-active-timestamp nil)
+
+
+
+(defvar nnbabyl-current-server nil)
+(defvar nnbabyl-server-alist nil)
+(defvar nnbabyl-server-variables 
+  (list
+   (list 'nnbabyl-mbox-file nnbabyl-mbox-file)
+   (list 'nnbabyl-active-file nnbabyl-active-file)
+   (list 'nnbabyl-get-new-mail nnbabyl-get-new-mail)
+   '(nnbabyl-current-group nil)
+   '(nnbabyl-status-string "")
+   '(nnbabyl-group-alist nil)))
+
+
+
+;;; Interface functions
+
+(defun nnbabyl-retrieve-headers (sequence &optional newsgroup server)
+  (save-excursion
+    (set-buffer nntp-server-buffer)
+    (erase-buffer)
+    (let ((number (length sequence))
+	  (count 0)
+	  article art-string start stop)
+      (nnbabyl-possibly-change-newsgroup newsgroup)
+      (if (stringp (car sequence))
+	  'headers
+	(while sequence
+	  (setq article (car sequence))
+	  (setq art-string (nnbabyl-article-string article))
+	  (set-buffer nnbabyl-mbox-buffer)
+	  (if (or (search-forward art-string nil t)
+		  (search-backward art-string nil t))
+	      (progn
+		(re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
+		(while (and (not (looking-at ".+:"))
+			    (zerop (forward-line 1))))
+		(setq start (point))
+		(search-forward "\n\n" nil t)
+		(setq stop (1- (point)))
+		(set-buffer nntp-server-buffer)
+		(insert "221 " (int-to-string article) " Article retrieved.\n")
+		(insert-buffer-substring nnbabyl-mbox-buffer start stop)
+		(goto-char (point-max))
+		(insert ".\n")))
+	  (setq sequence (cdr sequence))
+	  (setq count (1+ count))
+	  (and (numberp nnmail-large-newsgroup)
+	       (> number nnmail-large-newsgroup)
+	       (zerop (% count 20))
+	       gnus-verbose-backends
+	       (message "nnbabyl: Receiving headers... %d%%"
+			(/ (* count 100) number))))
+
+	(and (numberp nnmail-large-newsgroup)
+	     (> number nnmail-large-newsgroup)
+	     gnus-verbose-backends
+	     (message "nnbabyl: Receiving headers...done"))
+
+	;; Fold continuation lines.
+	(set-buffer nntp-server-buffer)
+	(goto-char (point-min))
+	(while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
+	  (replace-match " " t t))
+	'headers))))
+
+(defun nnbabyl-open-server (server &optional defs)
+  (nnheader-init-server-buffer)
+  (if (equal server nnbabyl-current-server)
+      t
+    (if nnbabyl-current-server
+	(setq nnbabyl-server-alist 
+	      (cons (list nnbabyl-current-server
+			  (nnheader-save-variables nnbabyl-server-variables))
+		    nnbabyl-server-alist)))
+    (let ((state (assoc server nnbabyl-server-alist)))
+      (if state 
+	  (progn
+	    (nnheader-restore-variables (nth 1 state))
+	    (setq nnbabyl-server-alist (delq state nnbabyl-server-alist)))
+	(nnheader-set-init-variables nnbabyl-server-variables defs)))
+    (setq nnbabyl-current-server server)))
+
+(defun nnbabyl-close-server (&optional server)
+  t)
+
+(defun nnbabyl-server-opened (&optional server)
+  (and (equal server nnbabyl-current-server)
+       nnbabyl-mbox-buffer
+       (buffer-name nnbabyl-mbox-buffer)
+       nntp-server-buffer
+       (buffer-name nntp-server-buffer)))
+
+(defun nnbabyl-status-message (&optional server)
+  nnbabyl-status-string)
+
+(defun nnbabyl-request-article (article &optional newsgroup server buffer)
+  (nnbabyl-possibly-change-newsgroup newsgroup)
+  (if (stringp article)
+      nil
+    (save-excursion
+      (set-buffer nnbabyl-mbox-buffer)
+      (goto-char (point-min))
+      (if (search-forward (nnbabyl-article-string article) nil t)
+	  (let (start stop summary-line)
+	    (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
+	    (while (and (not (looking-at ".+:"))
+			(zerop (forward-line 1))))
+	    (setq start (point))
+	    (or (and (re-search-forward 
+		      (concat "^" nnbabyl-mail-delimiter) nil t)
+		     (forward-line -1))
+		(goto-char (point-max)))
+	    (setq stop (point))
+	    (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
+	      (set-buffer nntp-server-buffer)
+	      (erase-buffer)
+	      (insert-buffer-substring nnbabyl-mbox-buffer start stop)
+	      (goto-char (point-min))
+	    ;; If there is an EOOH header, then we have to remove some
+	    ;; duplicated headers. 
+	    (setq summary-line (looking-at "Summary-line:"))
+	    (if (search-forward "\n*** EOOH ***" nil t)
+		(if summary-line
+		    ;; The headers to be deleted are located before the
+		    ;; EOOH line...
+		    (delete-region (point-min) 
+				   (progn (forward-line 1) (point)))
+		  ;; ...or after.
+		  (delete-region (progn (beginning-of-line) (point))
+				 (or (search-forward "\n\n" nil t)
+				     (point)))))
+	    t))))))
+
+(defun nnbabyl-request-group (group &optional server dont-check)
+  (save-excursion
+    (if (nnbabyl-possibly-change-newsgroup group)
+	(if dont-check
+	    t
+	  (nnbabyl-get-new-mail group)
+	  (save-excursion
+	    (set-buffer nntp-server-buffer)
+	    (erase-buffer)
+	    (let ((active (assoc group nnbabyl-group-alist)))
+	      (insert (format "211 %d %d %d %s\n" 
+			      (1+ (- (cdr (car (cdr active)))
+				     (car (car (cdr active)))))
+			      (car (car (cdr active)))
+			      (cdr (car (cdr active)))
+			      (car active))))
+	    t)))))
+
+(defun nnbabyl-close-group (group &optional server)
+  t)
+
+(defun nnbabyl-request-create-group (group &optional server) 
+  (nnmail-activate 'nnbabyl)
+  (or (assoc group nnbabyl-group-alist)
+      (let (active)
+	(setq nnbabyl-group-alist (cons (list group (setq active (cons 1 0)))
+					nnbabyl-group-alist))
+	(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)))
+  t)
+
+(defun nnbabyl-request-list (&optional server)
+  (if server (nnbabyl-get-new-mail))
+  (save-excursion
+    (or (nnmail-find-file nnbabyl-active-file)
+	(progn
+	  (setq nnbabyl-group-alist (nnmail-get-active))
+	  (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
+	  (nnmail-find-file nnbabyl-active-file)))))
+
+(defun nnbabyl-request-newgroups (date &optional server)
+  (nnbabyl-request-list server))
+
+(defun nnbabyl-request-list-newsgroups (&optional server)
+  (setq nnbabyl-status-string "nnbabyl: LIST NEWSGROUPS is not implemented.")
+  nil)
+
+(defun nnbabyl-request-post (&optional server)
+  (mail-send-and-exit nil))
+
+(defalias 'nnbabyl-request-post-buffer 'nnmail-request-post-buffer)
+
+(defun nnbabyl-request-expire-articles
+  (articles newsgroup &optional server force)
+  (nnbabyl-possibly-change-newsgroup newsgroup)
+  (let* ((days (or (and nnmail-expiry-wait-function
+			(funcall nnmail-expiry-wait-function newsgroup))
+		   nnmail-expiry-wait))
+	 (is-old t)
+	 rest)
+    (nnmail-activate 'nnbabyl)
+
+    (save-excursion 
+      (set-buffer nnbabyl-mbox-buffer)
+      (set-text-properties (point-min) (point-max) nil)
+      (while (and articles is-old)
+	(goto-char (point-min))
+	(if (search-forward (nnbabyl-article-string (car articles)) nil t)
+	    (if (or force
+		    (setq is-old
+			  (> (nnmail-days-between 
+			      (current-time-string)
+			      (buffer-substring 
+			       (point) (progn (end-of-line) (point))))
+			     days)))
+		(progn
+		  (and gnus-verbose-backends
+		       (message "Deleting article %s..." (car articles)))
+		  (nnbabyl-delete-mail))
+	      (setq rest (cons (car articles) rest))))
+	(setq articles (cdr articles)))
+      (save-buffer)
+      ;; Find the lowest active article in this group.
+      (let ((active (nth 1 (assoc newsgroup nnbabyl-group-alist))))
+	(goto-char (point-min))
+	(while (and (not (search-forward
+			  (nnbabyl-article-string (car active)) nil t))
+		    (<= (car active) (cdr active)))
+	  (setcar active (1+ (car active)))
+	  (goto-char (point-min))))
+      (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
+      (nconc rest articles))))
+
+(defun nnbabyl-request-move-article 
+  (article group server accept-form &optional last)
+  (nnbabyl-possibly-change-newsgroup group)
+  (let ((buf (get-buffer-create " *nnbabyl move*"))
+	result)
+    (and 
+     (nnbabyl-request-article article group server)
+     (save-excursion
+       (set-buffer buf)
+       (insert-buffer-substring nntp-server-buffer)
+       (goto-char (point-min))
+       (if (re-search-forward 
+	    "^X-Gnus-Newsgroup:" 
+	    (save-excursion (search-forward "\n\n" nil t) (point)) t)
+	   (delete-region (progn (beginning-of-line) (point))
+			  (progn (forward-line 1) (point))))
+       (setq result (eval accept-form))
+       (kill-buffer (current-buffer))
+       result)
+     (save-excursion
+       (set-buffer nnbabyl-mbox-buffer)
+       (goto-char (point-min))
+       (if (search-forward (nnbabyl-article-string article) nil t)
+	   (nnbabyl-delete-mail))
+       (and last (save-buffer))))
+    result))
+
+(defun nnbabyl-request-accept-article (group &optional last)
+  (let ((buf (current-buffer))
+	result beg)
+    (and 
+     (nnmail-activate 'nnbabyl)
+     (save-excursion
+       (goto-char (point-min))
+       (search-forward "\n\n" nil t)
+       (forward-line -1)
+       (save-excursion
+	 (while (re-search-backward "^X-Gnus-Newsgroup: " beg t)
+	   (delete-region (point) (progn (forward-line 1) (point)))))
+       (let ((nnmail-split-methods
+	      (if (stringp group) (list (list group "")) 
+		nnmail-split-methods)))
+	 (setq result (car (nnbabyl-save-mail))))
+       (set-buffer nnbabyl-mbox-buffer)
+       (goto-char (point-max))
+       (search-backward "\n\^_")
+       (goto-char (match-end 0))
+       (insert-buffer buf)
+       (and last (progn 
+		   (save-buffer)
+		   (nnmail-save-active
+		    nnbabyl-group-alist nnbabyl-active-file)))
+       result))))
+
+(defun nnbabyl-request-replace-article (article group buffer)
+  (nnbabyl-possibly-change-newsgroup group)
+  (save-excursion
+    (set-buffer nnbabyl-mbox-buffer)
+    (goto-char (point-min))
+    (if (not (search-forward (nnbabyl-article-string article) nil t))
+	nil
+      (nnbabyl-delete-mail t t)
+      (insert-buffer-substring buffer)
+      (save-buffer)
+      t)))
+
+
+;;; Low-Level Interface
+
+;; If FORCE, delete article no matter how many X-Gnus-Newsgroup
+;; headers there are. If LEAVE-DELIM, don't delete the Unix mbox
+;; delimeter line.
+(defun nnbabyl-delete-mail (&optional force leave-delim)
+  ;; Delete the current X-Gnus-Newsgroup line.
+  (or force
+      (delete-region
+       (progn (beginning-of-line) (point))
+       (progn (forward-line 1) (point))))
+  ;; Beginning of the article.
+  (save-excursion
+    (save-restriction
+      (widen)
+      (narrow-to-region
+       (save-excursion
+	 (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
+	 (if leave-delim (progn (forward-line 1) (point))
+	   (match-beginning 0)))
+       (progn
+	 (forward-line 1)
+	 (or (and (re-search-forward (concat "^" nnbabyl-mail-delimiter) 
+				     nil t)
+		  (if (and (not (bobp)) leave-delim)
+		      (progn (forward-line -2) (point))
+		    (match-beginning 0)))
+	     (point-max))))
+      (goto-char (point-min))
+      ;; Only delete the article if no other groups owns it as well.
+      (if (or force (not (re-search-forward "^X-Gnus-Newsgroup: " nil t)))
+	  (delete-region (point-min) (point-max))))))
+
+(defun nnbabyl-possibly-change-newsgroup (newsgroup)
+  (if (or (not nnbabyl-mbox-buffer)
+	  (not (buffer-name nnbabyl-mbox-buffer)))
+      (save-excursion (nnbabyl-read-mbox)))
+  (or nnbabyl-group-alist
+      (nnmail-activate 'nnbabyl))
+  (if newsgroup
+      (if (assoc newsgroup nnbabyl-group-alist)
+	  (setq nnbabyl-current-group newsgroup)
+	(setq nnbabyl-status-string "No such group in file")
+	nil)))
+
+(defun nnbabyl-article-string (article)
+  (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":" 
+	  (int-to-string article) " "))
+
+(defun nnbabyl-insert-lines ()
+  "Insert how many lines and chars there are in the body of the mail."
+  (let (lines chars)
+    (save-excursion
+      (goto-char (point-min))
+      (if (search-forward "\n\n" nil t) 
+	  (progn
+	    ;; There may be an EOOH line here...
+	    (if (looking-at "\\*\\*\\* EOOH \\*\\*\\*")
+		(search-forward "\n\n" nil t))
+	    (setq chars (- (point-max) (point)))
+	    (setq lines (- (count-lines (point) (point-max)) 1))
+	    ;; Move back to the end of the headers. 
+	    (goto-char (point-min))
+	    (search-forward "\n\n" nil t)
+	    (forward-char -1)
+	    (save-excursion
+	      (if (re-search-backward "^Lines: " nil t)
+		  (delete-region (point) (progn (forward-line 1) (point)))))
+	    (insert (format "Lines: %d\n" lines))
+	    chars)))))
+
+(defun nnbabyl-save-mail ()
+  ;; Called narrowed to an article.
+  (let ((group-art (nreverse (nnmail-article-group 'nnbabyl-active-number))))
+    (nnbabyl-insert-lines)
+    (nnmail-insert-xref group-art)
+    (nnbabyl-insert-newsgroup-line group-art)
+    (run-hooks 'nnbabyl-prepare-save-mail-hook)
+    group-art))
+
+(defun nnbabyl-insert-newsgroup-line (group-art)
+  (save-excursion
+    (goto-char (point-min))
+    (while (looking-at "From ")
+      (replace-match "Mail-from: From " t t)
+      (forward-line 1))
+    ;; If there is a C-l at the beginning of the narrowed region, this
+    ;; isn't really a "save", but rather a "scan".
+    (goto-char (point-min))
+    (or (looking-at "\^L")
+	(save-excursion
+	  (insert "\^L\n0, unseen,,\n*** EOOH ***\n")
+	  (goto-char (point-max))
+	  (insert "\^_\n")))
+    (if (search-forward "\n\n" nil t)
+	(progn
+	  (forward-char -1)
+	  (while group-art
+	    (insert (format "X-Gnus-Newsgroup: %s:%d   %s\n" 
+			    (car (car group-art)) (cdr (car group-art))
+			    (current-time-string)))
+	    (setq group-art (cdr group-art)))))
+    t))
+
+(defun nnbabyl-active-number (group)
+  ;; Find the next article number in GROUP.
+  (let ((active (car (cdr (assoc group nnbabyl-group-alist)))))
+    (if active
+	(setcdr active (1+ (cdr active)))
+      ;; This group is new, so we create a new entry for it.
+      ;; This might be a bit naughty... creating groups on the drop of
+      ;; a hat, but I don't know...
+      (setq nnbabyl-group-alist (cons (list group (setq active (cons 1 1)))
+				      nnbabyl-group-alist)))
+    (cdr active)))
+
+(defun nnbabyl-read-mbox ()
+  (nnmail-activate 'nnbabyl)
+  (or (file-exists-p nnbabyl-mbox-file)
+      (save-excursion
+	(set-buffer (setq nnbabyl-mbox-buffer
+			  (create-file-buffer nnbabyl-mbox-file)))
+	(setq buffer-file-name nnbabyl-mbox-file)
+	(insert "BABYL OPTIONS:\n\n\^_")
+	(write-region (point-min) (point-max) nnbabyl-mbox-file t 'nomesg)))
+
+  (if (and nnbabyl-mbox-buffer
+	   (buffer-name nnbabyl-mbox-buffer)
+	   (save-excursion
+	     (set-buffer nnbabyl-mbox-buffer)
+	     (= (buffer-size) (nth 7 (file-attributes nnbabyl-mbox-file)))))
+      ()
+    (save-excursion
+      (let ((delim (concat "^" nnbabyl-mail-delimiter))
+	    start end)
+	(set-buffer (setq nnbabyl-mbox-buffer 
+			  (nnheader-find-file-noselect 
+			   nnbabyl-mbox-file nil 'raw)))
+	(buffer-disable-undo (current-buffer))
+	(widen)
+	(setq buffer-read-only nil)
+	(fundamental-mode)
+	
+	(goto-char (point-min))
+	(re-search-forward delim nil t)
+	(setq start (match-end 0))
+	(while (re-search-forward delim nil t)
+	  (setq end (match-end 0))
+	  (or (search-backward "\nX-Gnus-Newsgroup: " start t)
+	      (progn
+		(goto-char end)
+		(save-excursion
+		  (save-restriction
+		    (goto-char start)
+		    (narrow-to-region start end)
+		    (nnbabyl-save-mail)
+		    (setq end (point-max))))))
+	  (goto-char (setq start end)))
+	(and (buffer-modified-p (current-buffer)) (save-buffer))
+	(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)))))
+
+(defun nnbabyl-remove-incoming-delims ()
+  (goto-char (point-min))
+  (while (search-forward "\^_" nil t)
+    (replace-match "?" t t)))
+
+(defun nnbabyl-get-new-mail (&optional group)
+  "Read new incoming mail."
+  (let* ((spools (nnmail-get-spool-files group))
+	 (group-in group)
+	 incoming incomings)
+    (nnbabyl-read-mbox)
+    (if (or (not nnbabyl-get-new-mail) (not nnmail-spool-file))
+	()
+      ;; We go through all the existing spool files and split the
+      ;; mail from each.
+      (while spools
+	(and
+	 (file-exists-p (car spools))
+	 (> (nth 7 (file-attributes (car spools))) 0)
+	 (progn
+	   (and gnus-verbose-backends 
+		(message "nnbabyl: Reading incoming mail..."))
+	   (if (not (setq incoming 
+			  (nnmail-move-inbox 
+			   (car spools) 
+			   (concat nnbabyl-mbox-file "-Incoming"))))
+	       ()
+	     (setq incomings (cons incoming incomings))
+	     (save-excursion
+	       (setq group (nnmail-get-split-group (car spools) group-in))
+	       (let* ((nnmail-prepare-incoming-hook
+		       (cons 'nnbabyl-remove-incoming-delims
+			     nnmail-prepare-incoming-hook))
+		      in-buf)
+		 (setq in-buf (nnmail-split-incoming 
+			       incoming 'nnbabyl-save-mail t group))
+		 (set-buffer in-buf)
+		 (goto-char (point-min))
+		 (while (search-forward "\n\^_\n" nil t)
+		   (delete-char -1))
+		 (set-buffer nnbabyl-mbox-buffer)
+		 (goto-char (point-max))
+		 (search-backward "\n\^_" nil t)
+		 (goto-char (match-end 0))
+		 (insert-buffer-substring in-buf)
+		 (kill-buffer in-buf))))))
+	(setq spools (cdr spools)))
+      ;; If we did indeed read any incoming spools, we save all info. 
+      (and (buffer-modified-p nnbabyl-mbox-buffer) 
+	   (save-excursion
+	     (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
+	     (set-buffer nnbabyl-mbox-buffer)
+	     (save-buffer)))
+      (if incomings (run-hooks 'nnmail-read-incoming-hook))
+      (while incomings
+	(setq incoming (car incomings))
+	(and nnmail-delete-incoming
+	     (file-exists-p incoming) 
+	     (file-writable-p incoming) 
+	     (delete-file incoming))
+	(setq incomings (cdr incomings))))))
+
+(provide 'nnbabyl)
+
+;;; nnbabyl.el ends here