lisp/gnus/nnmaildir.el

   1 ;;; nnmaildir.el --- maildir backend for Gnus
   2
   3 ;; This file is in the public domain.
   4
   5 ;; Author: Paul Jarc <prj@po.cwru.edu>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software: you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation, either version 3 of the License, or
  12 ;; (at your option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 ;;; Commentary:
  23
  24 ;; Maildir format is documented at <URL:http://cr.yp.to/proto/maildir.html>
  25 ;; and in the maildir(5) man page from qmail (available at
  26 ;; <URL:http://www.qmail.org/man/man5/maildir.html>).  nnmaildir also stores
  27 ;; extra information in the .nnmaildir/ directory within a maildir.
  28 ;;
  29 ;; Some goals of nnmaildir:
  30 ;; * Everything Just Works, and correctly.  E.g., NOV data is automatically
  31 ;;   regenerated when stale; no need for manually running
  32 ;;   *-generate-nov-databases.
  33 ;; * Perfect reliability: [C-g] will never corrupt its data in memory, and
  34 ;;   SIGKILL will never corrupt its data in the filesystem.
  35 ;; * Allow concurrent operation as much as possible.  If files change out
  36 ;;   from under us, adapt to the changes or degrade gracefully.
  37 ;; * We use the filesystem as a database, so that, e.g., it's easy to
  38 ;;   manipulate marks from outside Gnus.
  39 ;; * All information about a group is stored in the maildir, for easy backup,
  40 ;;   copying, restoring, etc.
  41 ;;
  42 ;; Todo:
  43 ;; * When moving an article for expiry, copy all the marks except 'expire
  44 ;;   from the original article.
  45 ;; * Add a hook for when moving messages from new/ to cur/, to support
  46 ;;   nnmail's duplicate detection.
  47 ;; * Improve generated Xrefs, so crossposts are detectable.
  48 ;; * Improve code readability.
  49
  50 ;;; Code:
  51
  52 ;; eval this before editing
  53 [(progn
  54    (put 'nnmaildir--with-nntp-buffer 'lisp-indent-function 0)
  55    (put 'nnmaildir--with-work-buffer 'lisp-indent-function 0)
  56    (put 'nnmaildir--with-nov-buffer  'lisp-indent-function 0)
  57    (put 'nnmaildir--with-move-buffer 'lisp-indent-function 0)
  58    (put 'nnmaildir--condcase         'lisp-indent-function 2)
  59    )
  60 ]
  61
  62 ;; For Emacs <22.2 and XEmacs.
  63 (eval-and-compile
  64   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  65
  66 (eval-and-compile
  67   (require 'nnheader)
  68   (require 'gnus)
  69   (require 'gnus-util)
  70   (require 'gnus-range)
  71   (require 'gnus-start)
  72   (require 'gnus-int)
  73   (require 'message))
  74 (eval-when-compile
  75   (require 'cl)
  76   (require 'nnmail))
  77
  78 (defconst nnmaildir-version "Gnus")
  79
  80 (defvar nnmaildir-article-file-name nil
  81   "*The filename of the most recently requested article.  This variable is set
  82 by nnmaildir-request-article.")
  83
  84 ;; The filename of the article being moved/copied:
  85 (defvar nnmaildir--file nil)
  86
  87 ;; Variables to generate filenames of messages being delivered:
  88 (defvar   nnmaildir--delivery-time "")
  89 (defconst nnmaildir--delivery-pid (concat "P" (number-to-string (emacs-pid))))
  90 (defvar   nnmaildir--delivery-count nil)
  91
  92 ;; An obarry containing symbols whose names are server names and whose values
  93 ;; are servers:
  94 (defvar nnmaildir--servers (make-vector 3 0))
  95 ;; The current server:
  96 (defvar nnmaildir--cur-server nil)
  97
  98 ;; A copy of nnmail-extra-headers
  99 (defvar nnmaildir--extra nil)
 100
 101 ;; A NOV structure looks like this (must be prin1-able, so no defstruct):
 102 ["subject\tfrom\tdate"
 103  "references\tchars\lines"
 104  "To: you\tIn-Reply-To: <your.mess@ge>"
 105  (12345 67890)     ;; modtime of the corresponding article file
 106  (to in-reply-to)] ;; contemporary value of nnmail-extra-headers
 107 (defconst nnmaildir--novlen 5)
 108 (defmacro nnmaildir--nov-new (beg mid end mtime extra)
 109   `(vector ,beg ,mid ,end ,mtime ,extra))
 110 (defmacro nnmaildir--nov-get-beg   (nov) `(aref ,nov 0))
 111 (defmacro nnmaildir--nov-get-mid   (nov) `(aref ,nov 1))
 112 (defmacro nnmaildir--nov-get-end   (nov) `(aref ,nov 2))
 113 (defmacro nnmaildir--nov-get-mtime (nov) `(aref ,nov 3))
 114 (defmacro nnmaildir--nov-get-extra (nov) `(aref ,nov 4))
 115 (defmacro nnmaildir--nov-set-beg   (nov value) `(aset ,nov 0 ,value))
 116 (defmacro nnmaildir--nov-set-mid   (nov value) `(aset ,nov 1 ,value))
 117 (defmacro nnmaildir--nov-set-end   (nov value) `(aset ,nov 2 ,value))
 118 (defmacro nnmaildir--nov-set-mtime (nov value) `(aset ,nov 3 ,value))
 119 (defmacro nnmaildir--nov-set-extra (nov value) `(aset ,nov 4 ,value))
 120
 121 (defstruct nnmaildir--art
 122   (prefix nil :type string)  ;; "time.pid.host"
 123   (suffix nil :type string)  ;; ":2,flags"
 124   (num    nil :type natnum)  ;; article number
 125   (msgid  nil :type string)  ;; "<mess.age@id>"
 126   (nov    nil :type vector)) ;; cached nov structure, or nil
 127
 128 (defstruct nnmaildir--grp
 129   (name  nil :type string)  ;; "group.name"
 130   (new   nil :type list)    ;; new/ modtime
 131   (cur   nil :type list)    ;; cur/ modtime
 132   (min   1   :type natnum)  ;; minimum article number
 133   (count 0   :type natnum)  ;; count of articles
 134   (nlist nil :type list)    ;; list of articles, ordered descending by number
 135   (flist nil :type vector)  ;; obarray mapping filename prefix->article
 136   (mlist nil :type vector)  ;; obarray mapping message-id->article
 137   (cache nil :type vector)  ;; nov cache
 138   (index nil :type natnum)  ;; index of next cache entry to replace
 139   (mmth  nil :type vector)) ;; obarray mapping mark name->dir modtime
 140                                         ; ("Mark Mod Time Hash")
 141
 142 (defstruct nnmaildir--srv
 143   (address       nil :type string)         ;; server address string
 144   (method        nil :type list)           ;; (nnmaildir "address" ...)
 145   (prefix        nil :type string)         ;; "nnmaildir+address:"
 146   (dir           nil :type string)         ;; "/expanded/path/to/server/dir/"
 147   (ls            nil :type function)       ;; directory-files function
 148   (groups        nil :type vector)         ;; obarray mapping group name->group
 149   (curgrp        nil :type nnmaildir--grp) ;; current group, or nil
 150   (error         nil :type string)         ;; last error message, or nil
 151   (mtime         nil :type list)           ;; modtime of dir
 152   (gnm           nil)                      ;; flag: split from mail-sources?
 153   (target-prefix nil :type string))        ;; symlink target prefix
 154
 155 (defun nnmaildir--expired-article (group article)
 156   (setf (nnmaildir--art-nov article) nil)
 157   (let ((flist  (nnmaildir--grp-flist group))
 158         (mlist  (nnmaildir--grp-mlist group))
 159         (min    (nnmaildir--grp-min   group))
 160         (count  (1- (nnmaildir--grp-count group)))
 161         (prefix (nnmaildir--art-prefix article))
 162         (msgid  (nnmaildir--art-msgid  article))
 163         (new-nlist nil)
 164         (nlist-pre '(nil . nil))
 165         nlist-post num)
 166     (unless (zerop count)
 167       (setq nlist-post (nnmaildir--grp-nlist group)
 168             num (nnmaildir--art-num article))
 169       (if (eq num (caar nlist-post))
 170           (setq new-nlist (cdr nlist-post))
 171         (setq new-nlist nlist-post
 172               nlist-pre nlist-post
 173               nlist-post (cdr nlist-post))
 174         (while (/= num (caar nlist-post))
 175           (setq nlist-pre nlist-post
 176                 nlist-post (cdr nlist-post)))
 177         (setq nlist-post (cdr nlist-post))
 178         (if (eq num min)
 179             (setq min (caar nlist-pre)))))
 180     (let ((inhibit-quit t))
 181       (setf (nnmaildir--grp-min   group) min)
 182       (setf (nnmaildir--grp-count group) count)
 183       (setf (nnmaildir--grp-nlist group) new-nlist)
 184       (setcdr nlist-pre nlist-post)
 185       (unintern prefix flist)
 186       (unintern msgid mlist))))
 187
 188 (defun nnmaildir--nlist-art (group num)
 189   (let ((entry (assq num (nnmaildir--grp-nlist group))))
 190     (if entry
 191         (cdr entry))))
 192 (defmacro nnmaildir--flist-art (list file)
 193   `(symbol-value (intern-soft ,file ,list)))
 194 (defmacro nnmaildir--mlist-art (list msgid)
 195   `(symbol-value (intern-soft ,msgid ,list)))
 196
 197 (defun nnmaildir--pgname (server gname)
 198   (let ((prefix (nnmaildir--srv-prefix server)))
 199     (if prefix (concat prefix gname)
 200       (setq gname (gnus-group-prefixed-name gname
 201                                             (nnmaildir--srv-method server)))
 202       (setf (nnmaildir--srv-prefix server) (gnus-group-real-prefix gname))
 203       gname)))
 204
 205 (defun nnmaildir--param (pgname param)
 206   (setq param (gnus-group-find-parameter pgname param 'allow-list))
 207   (if (vectorp param) (setq param (aref param 0)))
 208   (eval param))
 209
 210 (defmacro nnmaildir--with-nntp-buffer (&rest body)
 211   `(with-current-buffer nntp-server-buffer
 212      ,@body))
 213 (defmacro nnmaildir--with-work-buffer (&rest body)
 214   `(with-current-buffer (get-buffer-create " *nnmaildir work*")
 215      ,@body))
 216 (defmacro nnmaildir--with-nov-buffer (&rest body)
 217   `(with-current-buffer (get-buffer-create " *nnmaildir nov*")
 218      ,@body))
 219 (defmacro nnmaildir--with-move-buffer (&rest body)
 220   `(with-current-buffer (get-buffer-create " *nnmaildir move*")
 221      ,@body))
 222
 223 (defmacro nnmaildir--subdir (dir subdir)
 224   `(file-name-as-directory (concat ,dir ,subdir)))
 225 (defmacro nnmaildir--srvgrp-dir (srv-dir gname)
 226   `(nnmaildir--subdir ,srv-dir ,gname))
 227 (defmacro nnmaildir--tmp       (dir) `(nnmaildir--subdir ,dir "tmp"))
 228 (defmacro nnmaildir--new       (dir) `(nnmaildir--subdir ,dir "new"))
 229 (defmacro nnmaildir--cur       (dir) `(nnmaildir--subdir ,dir "cur"))
 230 (defmacro nnmaildir--nndir     (dir) `(nnmaildir--subdir ,dir ".nnmaildir"))
 231 (defmacro nnmaildir--nov-dir   (dir) `(nnmaildir--subdir ,dir "nov"))
 232 (defmacro nnmaildir--marks-dir (dir) `(nnmaildir--subdir ,dir "marks"))
 233 (defmacro nnmaildir--num-dir   (dir) `(nnmaildir--subdir ,dir "num"))
 234
 235 (defmacro nnmaildir--unlink (file-arg)
 236   `(let ((file ,file-arg))
 237      (if (file-attributes file) (delete-file file))))
 238 (defun nnmaildir--mkdir (dir)
 239   (or (file-exists-p (file-name-as-directory dir))
 240       (make-directory-internal (directory-file-name dir))))
 241 (defun nnmaildir--mkfile (file)
 242   (write-region "" nil file nil 'no-message))
 243 (defun nnmaildir--delete-dir-files (dir ls)
 244   (when (file-attributes dir)
 245     (mapc 'delete-file (funcall ls dir 'full "\\`[^.]" 'nosort))
 246     (delete-directory dir)))
 247
 248 (defun nnmaildir--group-maxnum (server group)
 249   (catch 'return
 250     (if (zerop (nnmaildir--grp-count group)) (throw 'return 0))
 251     (let ((dir (nnmaildir--srvgrp-dir (nnmaildir--srv-dir server)
 252                                     (nnmaildir--grp-name group)))
 253           (number-opened 1)
 254           attr ino-opened nlink number-linked)
 255       (setq dir (nnmaildir--nndir dir)
 256             dir (nnmaildir--num-dir dir))
 257       (while t
 258         (setq attr (file-attributes
 259                     (concat dir (number-to-string number-opened))))
 260         (or attr (throw 'return (1- number-opened)))
 261         (setq ino-opened (nth 10 attr)
 262               nlink (nth 1 attr)
 263               number-linked (+ number-opened nlink))
 264         (if (or (< nlink 1) (< number-linked nlink))
 265             (signal 'error '("Arithmetic overflow")))
 266         (setq attr (file-attributes
 267                     (concat dir (number-to-string number-linked))))
 268         (or attr (throw 'return (1- number-linked)))
 269         (unless (equal ino-opened (nth 10 attr))
 270           (setq number-opened number-linked))))))
 271
 272 ;; Make the given server, if non-nil, be the current server.  Then make the
 273 ;; given group, if non-nil, be the current group of the current server.  Then
 274 ;; return the group object for the current group.
 275 (defun nnmaildir--prepare (server group)
 276   (let (x groups)
 277     (catch 'return
 278       (if (null server)
 279           (unless (setq server nnmaildir--cur-server)
 280             (throw 'return nil))
 281         (unless (setq server (intern-soft server nnmaildir--servers))
 282           (throw 'return nil))
 283         (setq server (symbol-value server)
 284               nnmaildir--cur-server server))
 285       (unless (setq groups (nnmaildir--srv-groups server))
 286         (throw 'return nil))
 287       (unless (nnmaildir--srv-method server)
 288         (setq x (concat "nnmaildir:" (nnmaildir--srv-address server))
 289               x (gnus-server-to-method x))
 290         (unless x (throw 'return nil))
 291         (setf (nnmaildir--srv-method server) x))
 292       (if (null group)
 293           (unless (setq group (nnmaildir--srv-curgrp server))
 294             (throw 'return nil))
 295         (unless (setq group (intern-soft group groups))
 296           (throw 'return nil))
 297         (setq group (symbol-value group)))
 298       group)))
 299
 300 (defun nnmaildir--tab-to-space (string)
 301   (let ((pos 0))
 302     (while (string-match "\t" string pos)
 303       (aset string (match-beginning 0) ? )
 304       (setq pos (match-end 0))))
 305   string)
 306
 307 (defmacro nnmaildir--condcase (errsym body &rest handler)
 308   `(condition-case ,errsym
 309        (let ((system-messages-locale "C")) ,body)
 310      (error . ,handler)))
 311
 312 (defun nnmaildir--emlink-p (err)
 313   (and (eq (car err) 'file-error)
 314        (string= (downcase (caddr err)) "too many links")))
 315
 316 (defun nnmaildir--enoent-p (err)
 317   (and (eq (car err) 'file-error)
 318        (string= (downcase (caddr err)) "no such file or directory")))
 319
 320 (defun nnmaildir--eexist-p (err)
 321   (eq (car err) 'file-already-exists))
 322
 323 (defun nnmaildir--new-number (nndir)
 324   "Allocate a new article number by atomically creating a file under NNDIR."
 325   (let ((numdir (nnmaildir--num-dir nndir))
 326         (make-new-file t)
 327         (number-open 1)
 328         number-link previous-number-link path-open path-link ino-open)
 329     (nnmaildir--mkdir numdir)
 330     (catch 'return
 331       (while t
 332         (setq path-open (concat numdir (number-to-string number-open)))
 333         (if (not make-new-file)
 334             (setq previous-number-link number-link)
 335           (nnmaildir--mkfile path-open)
 336           ;; If Emacs had O_CREAT|O_EXCL, we could return number-open here.
 337           (setq make-new-file nil
 338                 previous-number-link 0))
 339         (let* ((attr (file-attributes path-open))
 340                (nlink (nth 1 attr)))
 341           (setq ino-open (nth 10 attr)
 342                 number-link (+ number-open nlink))
 343           (if (or (< nlink 1) (< number-link nlink))
 344               (signal 'error '("Arithmetic overflow"))))
 345         (if (= number-link previous-number-link)
 346             ;; We've already tried this number, in the previous loop iteration,
 347             ;; and failed.
 348             (signal 'error `("Corrupt internal nnmaildir data" ,path-open)))
 349         (setq path-link (concat numdir (number-to-string number-link)))
 350         (nnmaildir--condcase err
 351             (progn
 352               (add-name-to-file path-open path-link)
 353               (throw 'return number-link))
 354           (cond
 355            ((nnmaildir--emlink-p err)
 356             (setq make-new-file t
 357                   number-open number-link))
 358            ((nnmaildir--eexist-p err)
 359             (let ((attr (file-attributes path-link)))
 360               (unless (equal (nth 10 attr) ino-open)
 361                 (setq number-open number-link
 362                       number-link 0))))
 363            (t (signal (car err) (cdr err)))))))))
 364
 365 (defun nnmaildir--update-nov (server group article)
 366   (let ((nnheader-file-coding-system 'binary)
 367         (srv-dir (nnmaildir--srv-dir server))
 368         (storage-version 1) ;; [version article-number msgid [...nov...]]
 369         dir gname pgname msgdir prefix suffix file attr mtime novdir novfile
 370         nov msgid nov-beg nov-mid nov-end field val old-extra num numdir
 371         deactivate-mark)
 372     (catch 'return
 373       (setq gname (nnmaildir--grp-name group)
 374             pgname (nnmaildir--pgname server gname)
 375             dir (nnmaildir--srvgrp-dir srv-dir gname)
 376             msgdir (if (nnmaildir--param pgname 'read-only)
 377                        (nnmaildir--new dir) (nnmaildir--cur dir))
 378             prefix (nnmaildir--art-prefix article)
 379             suffix (nnmaildir--art-suffix article)
 380             file (concat msgdir prefix suffix)
 381             attr (file-attributes file))
 382       (unless attr
 383         (nnmaildir--expired-article group article)
 384         (throw 'return nil))
 385       (setq mtime (nth 5 attr)
 386             attr (nth 7 attr)
 387             nov (nnmaildir--art-nov article)
 388             dir (nnmaildir--nndir dir)
 389             novdir (nnmaildir--nov-dir dir)
 390             novfile (concat novdir prefix))
 391       (unless (equal nnmaildir--extra nnmail-extra-headers)
 392         (setq nnmaildir--extra (copy-sequence nnmail-extra-headers)))
 393       (nnmaildir--with-nov-buffer
 394         ;; First we'll check for already-parsed NOV data.
 395         (cond ((not (file-exists-p novfile))
 396                ;; The NOV file doesn't exist; we have to parse the message.
 397                (setq nov nil))
 398               ((not nov)
 399                ;; The file exists, but the data isn't in memory; read the file.
 400                (erase-buffer)
 401                (nnheader-insert-file-contents novfile)
 402                (setq nov (read (current-buffer)))
 403                (if (not (and (vectorp nov)
 404                              (/= 0 (length nov))
 405                              (equal storage-version (aref nov 0))))
 406                    ;; This NOV data seems to be in the wrong format.
 407                    (setq nov nil)
 408                  (unless (nnmaildir--art-num   article)
 409                    (setf (nnmaildir--art-num   article) (aref nov 1)))
 410                  (unless (nnmaildir--art-msgid article)
 411                    (setf (nnmaildir--art-msgid article) (aref nov 2)))
 412                  (setq nov (aref nov 3)))))
 413         ;; Now check whether the already-parsed data (if we have any) is
 414         ;; usable: if the message has been edited or if nnmail-extra-headers
 415         ;; has been augmented since this data was parsed from the message,
 416         ;; then we have to reparse.  Otherwise it's up-to-date.
 417         (when (and nov (equal mtime (nnmaildir--nov-get-mtime nov)))
 418           ;; The timestamp matches.  Now check nnmail-extra-headers.
 419           (setq old-extra (nnmaildir--nov-get-extra nov))
 420           (when (equal nnmaildir--extra old-extra) ;; common case
 421             ;; Save memory; use a single copy of the list value.
 422             (nnmaildir--nov-set-extra nov nnmaildir--extra)
 423             (throw 'return nov))
 424           ;; They're not equal, but maybe the new is a subset of the old.
 425           (if (null nnmaildir--extra)
 426               ;; The empty set is a subset of every set.
 427               (throw 'return nov))
 428           (if (not (memq nil (mapcar (lambda (e) (memq e old-extra))
 429                                      nnmaildir--extra)))
 430               (throw 'return nov)))
 431         ;; Parse the NOV data out of the message.
 432         (erase-buffer)
 433         (nnheader-insert-file-contents file)
 434         (insert "\n")
 435         (goto-char (point-min))
 436         (save-restriction
 437           (if (search-forward "\n\n" nil 'noerror)
 438               (progn
 439                 (setq nov-mid (count-lines (point) (point-max)))
 440                 (narrow-to-region (point-min) (1- (point))))
 441             (setq nov-mid 0))
 442           (goto-char (point-min))
 443           (delete-char 1)
 444           (setq nov (nnheader-parse-naked-head)
 445                 field (or (mail-header-lines nov) 0)))
 446         (unless (or (zerop field) (nnmaildir--param pgname 'distrust-Lines:))
 447           (setq nov-mid field))
 448         (setq nov-mid (number-to-string nov-mid)
 449               nov-mid (concat (number-to-string attr) "\t" nov-mid))
 450         (save-match-data
 451           (setq field (or (mail-header-references nov) ""))
 452           (nnmaildir--tab-to-space field)
 453           (setq nov-mid (concat field "\t" nov-mid)
 454                 nov-beg (mapconcat
 455                           (lambda (f) (nnmaildir--tab-to-space (or f "")))
 456                           (list (mail-header-subject nov)
 457                                 (mail-header-from nov)
 458                                 (mail-header-date nov)) "\t")
 459                 nov-end (mapconcat
 460                           (lambda (extra)
 461                             (setq field (symbol-name (car extra))
 462                                   val (cdr extra))
 463                             (nnmaildir--tab-to-space field)
 464                             (nnmaildir--tab-to-space val)
 465                             (concat field ": " val))
 466                           (mail-header-extra nov) "\t")))
 467         (setq msgid (mail-header-id nov))
 468         (if (or (null msgid) (nnheader-fake-message-id-p msgid))
 469             (setq msgid (concat "<" prefix "@nnmaildir>")))
 470         (nnmaildir--tab-to-space msgid)
 471         ;; The data is parsed; create an nnmaildir NOV structure.
 472         (setq nov (nnmaildir--nov-new nov-beg nov-mid nov-end mtime
 473                                       nnmaildir--extra)
 474               num (nnmaildir--art-num article))
 475         (unless num
 476           (setq num (nnmaildir--new-number dir))
 477           (setf (nnmaildir--art-num article) num))
 478         ;; Store this new NOV data in a file
 479         (erase-buffer)
 480         (prin1 (vector storage-version num msgid nov) (current-buffer))
 481         (setq file (concat novfile ":"))
 482         (nnmaildir--unlink file)
 483         (gmm-write-region (point-min) (point-max) file nil 'no-message nil
 484                           'excl))
 485       (rename-file file novfile 'replace)
 486       (setf (nnmaildir--art-msgid article) msgid)
 487       nov)))
 488
 489 (defun nnmaildir--cache-nov (group article nov)
 490   (let ((cache (nnmaildir--grp-cache group))
 491         (index (nnmaildir--grp-index group))
 492         goner)
 493     (unless (nnmaildir--art-nov article)
 494       (setq goner (aref cache index))
 495       (if goner (setf (nnmaildir--art-nov goner) nil))
 496       (aset cache index article)
 497       (setf (nnmaildir--grp-index group) (% (1+ index) (length cache))))
 498     (setf (nnmaildir--art-nov article) nov)))
 499
 500 (defun nnmaildir--grp-add-art (server group article)
 501   (let ((nov (nnmaildir--update-nov server group article))
 502         count num min nlist nlist-cdr insert-nlist)
 503     (when nov
 504       (setq count (1+ (nnmaildir--grp-count group))
 505             num (nnmaildir--art-num article)
 506             min (if (= count 1) num
 507                   (min num (nnmaildir--grp-min group)))
 508             nlist (nnmaildir--grp-nlist group))
 509       (if (or (null nlist) (> num (caar nlist)))
 510           (setq nlist (cons (cons num article) nlist))
 511         (setq insert-nlist t
 512               nlist-cdr (cdr nlist))
 513         (while (and nlist-cdr (< num (caar nlist-cdr)))
 514           (setq nlist nlist-cdr
 515                 nlist-cdr (cdr nlist))))
 516       (let ((inhibit-quit t))
 517         (setf (nnmaildir--grp-count group) count)
 518         (setf (nnmaildir--grp-min group) min)
 519         (if insert-nlist
 520             (setcdr nlist (cons (cons num article) nlist-cdr))
 521           (setf (nnmaildir--grp-nlist group) nlist))
 522         (set (intern (nnmaildir--art-prefix article)
 523                      (nnmaildir--grp-flist group))
 524              article)
 525         (set (intern (nnmaildir--art-msgid article)
 526                      (nnmaildir--grp-mlist group))
 527              article)
 528         (set (intern (nnmaildir--grp-name group)
 529                      (nnmaildir--srv-groups server))
 530              group))
 531       (nnmaildir--cache-nov group article nov)
 532       t)))
 533
 534 (defun nnmaildir--group-ls (server pgname)
 535   (or (nnmaildir--param pgname 'directory-files)
 536       (nnmaildir--srv-ls server)))
 537
 538 (defun nnmaildir-article-number-to-file-name
 539   (number group-name server-address-string)
 540   (let ((group (nnmaildir--prepare server-address-string group-name))
 541         article dir pgname)
 542     (catch 'return
 543       (unless group
 544         ;; The given group or server does not exist.
 545         (throw 'return nil))
 546       (setq article (nnmaildir--nlist-art group number))
 547       (unless article
 548         ;; The given article number does not exist in this group.
 549         (throw 'return nil))
 550       (setq pgname (nnmaildir--pgname nnmaildir--cur-server group-name)
 551             dir (nnmaildir--srv-dir nnmaildir--cur-server)
 552             dir (nnmaildir--srvgrp-dir dir group-name)
 553             dir (if (nnmaildir--param pgname 'read-only)
 554                     (nnmaildir--new dir) (nnmaildir--cur dir)))
 555       (concat dir (nnmaildir--art-prefix article)
 556               (nnmaildir--art-suffix article)))))
 557
 558 (defun nnmaildir-article-number-to-base-name
 559   (number group-name server-address-string)
 560   (let ((x (nnmaildir--prepare server-address-string group-name)))
 561     (when x
 562       (setq x (nnmaildir--nlist-art x number))
 563       (and x (cons (nnmaildir--art-prefix x)
 564                    (nnmaildir--art-suffix x))))))
 565
 566 (defun nnmaildir-base-name-to-article-number
 567   (base-name group-name server-address-string)
 568   (let ((x (nnmaildir--prepare server-address-string group-name)))
 569     (when x
 570       (setq x (nnmaildir--grp-flist x)
 571             x (nnmaildir--flist-art x base-name))
 572       (and x (nnmaildir--art-num x)))))
 573
 574 (defun nnmaildir--nlist-iterate (nlist ranges func)
 575   (let (entry high low nlist2)
 576     (if (eq ranges 'all)
 577         (setq ranges `((1 . ,(caar nlist)))))
 578     (while ranges
 579       (setq entry (car ranges) ranges (cdr ranges))
 580       (while (and ranges (eq entry (car ranges)))
 581         (setq ranges (cdr ranges))) ;; skip duplicates
 582       (if (numberp entry)
 583           (setq low entry
 584                 high entry)
 585         (setq low (car entry)
 586               high (cdr entry)))
 587       (setq nlist2 nlist) ;; Don't assume any sorting of ranges
 588       (catch 'iterate-loop
 589         (while nlist2
 590           (if (<= (caar nlist2) high) (throw 'iterate-loop nil))
 591           (setq nlist2 (cdr nlist2))))
 592       (catch 'iterate-loop
 593         (while nlist2
 594           (setq entry (car nlist2) nlist2 (cdr nlist2))
 595           (if (< (car entry) low) (throw 'iterate-loop nil))
 596           (funcall func (cdr entry)))))))
 597
 598 (defun nnmaildir--up2-1 (n)
 599   (if (zerop n) 1 (1- (lsh 1 (1+ (logb n))))))
 600
 601 (defun nnmaildir--system-name ()
 602   (gnus-replace-in-string
 603    (gnus-replace-in-string
 604     (gnus-replace-in-string
 605      (system-name)
 606      "\\\\" "\\134" 'literal)
 607     "/" "\\057" 'literal)
 608    ":" "\\072" 'literal))
 609
 610 (defun nnmaildir-request-type (group &optional article)
 611   'mail)
 612
 613 (defun nnmaildir-status-message (&optional server)
 614   (nnmaildir--prepare server nil)
 615   (nnmaildir--srv-error nnmaildir--cur-server))
 616
 617 (defun nnmaildir-server-opened (&optional server)
 618   (and nnmaildir--cur-server
 619        (if server
 620            (string-equal server (nnmaildir--srv-address nnmaildir--cur-server))
 621          t)
 622        (nnmaildir--srv-groups nnmaildir--cur-server)
 623        t))
 624
 625 (defun nnmaildir-open-server (server &optional defs)
 626   (let ((x server)
 627         dir size)
 628     (catch 'return
 629       (setq server (intern-soft x nnmaildir--servers))
 630       (if server
 631           (and (setq server (symbol-value server))
 632                (nnmaildir--srv-groups server)
 633                (setq nnmaildir--cur-server server)
 634                (throw 'return t))
 635         (setq server (make-nnmaildir--srv :address x))
 636         (let ((inhibit-quit t))
 637           (set (intern x nnmaildir--servers) server)))
 638       (setq dir (assq 'directory defs))
 639       (unless dir
 640         (setf (nnmaildir--srv-error server)
 641               "You must set \"directory\" in the select method")
 642         (throw 'return nil))
 643       (setq dir (cadr dir)
 644             dir (eval dir)
 645             dir (expand-file-name dir)
 646             dir (file-name-as-directory dir))
 647       (unless (file-exists-p dir)
 648         (setf (nnmaildir--srv-error server) (concat "No such directory: " dir))
 649         (throw 'return nil))
 650       (setf (nnmaildir--srv-dir server) dir)
 651       (setq x (assq 'directory-files defs))
 652       (if (null x)
 653           (setq x (if nnheader-directory-files-is-safe 'directory-files
 654                     'nnheader-directory-files-safe))
 655         (setq x (cadr x))
 656         (unless (functionp x)
 657           (setf (nnmaildir--srv-error server)
 658                 (concat "Not a function: " (prin1-to-string x)))
 659           (throw 'return nil)))
 660       (setf (nnmaildir--srv-ls server) x)
 661       (setq size (length (funcall x dir nil "\\`[^.]" 'nosort))
 662             size (nnmaildir--up2-1 size))
 663       (and (setq x (assq 'get-new-mail defs))
 664            (setq x (cdr x))
 665            (car x)
 666            (setf (nnmaildir--srv-gnm server) t)
 667            (require 'nnmail))
 668       (setq x (assq 'target-prefix defs))
 669       (if x
 670           (progn
 671             (setq x (cadr x)
 672                   x (eval x))
 673             (setf (nnmaildir--srv-target-prefix server) x))
 674         (setq x (assq 'create-directory defs))
 675         (if x
 676             (progn
 677               (setq x (cadr x)
 678                     x (eval x)
 679                     x (file-name-as-directory x))
 680               (setf (nnmaildir--srv-target-prefix server) x))
 681           (setf (nnmaildir--srv-target-prefix server) "")))
 682       (setf (nnmaildir--srv-groups server) (make-vector size 0))
 683       (setq nnmaildir--cur-server server)
 684       t)))
 685
 686 (defun nnmaildir--parse-filename (file)
 687   (let ((prefix (car file))
 688         timestamp len)
 689     (if (string-match "\\`\\([0-9]+\\)\\(\\..*\\)\\'" prefix)
 690         (progn
 691           (setq timestamp (concat "0000" (match-string 1 prefix))
 692                 len (- (length timestamp) 4))
 693           (vector (string-to-number (substring timestamp 0 len))
 694                   (string-to-number (substring timestamp len))
 695                   (match-string 2 prefix)
 696                   file))
 697       file)))
 698
 699 (defun nnmaildir--sort-files (a b)
 700   (catch 'return
 701     (if (consp a)
 702         (throw 'return (and (consp b) (string-lessp (car a) (car b)))))
 703     (if (consp b) (throw 'return t))
 704     (if (< (aref a 0) (aref b 0)) (throw 'return t))
 705     (if (> (aref a 0) (aref b 0)) (throw 'return nil))
 706     (if (< (aref a 1) (aref b 1)) (throw 'return t))
 707     (if (> (aref a 1) (aref b 1)) (throw 'return nil))
 708     (string-lessp (aref a 2) (aref b 2))))
 709
 710 (defun nnmaildir--scan (gname scan-msgs groups method srv-dir srv-ls)
 711   (catch 'return
 712     (let ((36h-ago (- (car (current-time)) 2))
 713           absdir nndir tdir ndir cdir nattr cattr isnew pgname read-only ls
 714           files num dir flist group x)
 715       (setq absdir (nnmaildir--srvgrp-dir srv-dir gname)
 716             nndir (nnmaildir--nndir absdir))
 717       (unless (file-exists-p absdir)
 718         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 719               (concat "No such directory: " absdir))
 720         (throw 'return nil))
 721       (setq tdir (nnmaildir--tmp absdir)
 722             ndir (nnmaildir--new absdir)
 723             cdir (nnmaildir--cur absdir)
 724             nattr (file-attributes ndir)
 725             cattr (file-attributes cdir))
 726       (unless (and (file-exists-p tdir) nattr cattr)
 727         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 728               (concat "Not a maildir: " absdir))
 729         (throw 'return nil))
 730       (setq group (nnmaildir--prepare nil gname)
 731             pgname (nnmaildir--pgname nnmaildir--cur-server gname))
 732       (if group
 733           (setq isnew nil)
 734         (setq isnew t
 735               group (make-nnmaildir--grp :name gname :index 0))
 736         (nnmaildir--mkdir nndir)
 737         (nnmaildir--mkdir (nnmaildir--nov-dir   nndir))
 738         (nnmaildir--mkdir (nnmaildir--marks-dir nndir)))
 739       (setq read-only (nnmaildir--param pgname 'read-only)
 740             ls (or (nnmaildir--param pgname 'directory-files) srv-ls))
 741       (unless read-only
 742         (setq x (nth 11 (file-attributes tdir)))
 743         (unless (and (equal x (nth 11 nattr)) (equal x (nth 11 cattr)))
 744           (setf (nnmaildir--srv-error nnmaildir--cur-server)
 745                 (concat "Maildir spans filesystems: " absdir))
 746           (throw 'return nil))
 747         (dolist (file (funcall ls tdir 'full "\\`[^.]" 'nosort))
 748           (setq x (file-attributes file))
 749           (if (or (> (cadr x) 1) (< (car (nth 4 x)) 36h-ago))
 750               (delete-file file))))
 751       (or scan-msgs
 752           isnew
 753           (throw 'return t))
 754       (setq nattr (nth 5 nattr))
 755       (if (equal nattr (nnmaildir--grp-new group))
 756           (setq nattr nil))
 757       (if read-only (setq dir (and (or isnew nattr) ndir))
 758         (when (or isnew nattr)
 759           (dolist (file  (funcall ls ndir nil "\\`[^.]" 'nosort))
 760             (setq x (concat ndir file))
 761             (and (time-less-p (nth 5 (file-attributes x)) (current-time))
 762                  (rename-file x (concat cdir file ":2,"))))
 763           (setf (nnmaildir--grp-new group) nattr))
 764         (setq cattr (nth 5 (file-attributes cdir)))
 765         (if (equal cattr (nnmaildir--grp-cur group))
 766             (setq cattr nil))
 767         (setq dir (and (or isnew cattr) cdir)))
 768       (unless dir (throw 'return t))
 769       (setq files (funcall ls dir nil "\\`[^.]" 'nosort)
 770             files (save-match-data
 771                     (mapcar
 772                      (lambda (f)
 773                        (string-match "\\`\\([^:]*\\)\\(\\(:.*\\)?\\)\\'" f)
 774                        (cons (match-string 1 f) (match-string 2 f)))
 775                      files)))
 776       (when isnew
 777         (setq num (nnmaildir--up2-1 (length files)))
 778         (setf (nnmaildir--grp-flist group) (make-vector num 0))
 779         (setf (nnmaildir--grp-mlist group) (make-vector num 0))
 780         (setf (nnmaildir--grp-mmth group) (make-vector 1 0))
 781         (setq num (nnmaildir--param pgname 'nov-cache-size))
 782         (if (numberp num) (if (< num 1) (setq num 1))
 783           (setq num 16
 784                 cdir (nnmaildir--marks-dir nndir)
 785                 ndir (nnmaildir--subdir cdir "tick")
 786                 cdir (nnmaildir--subdir cdir "read"))
 787           (dolist (file files)
 788             (setq file (car file))
 789             (if (or (not (file-exists-p (concat cdir file)))
 790                     (file-exists-p (concat ndir file)))
 791                 (setq num (1+ num)))))
 792         (setf (nnmaildir--grp-cache group) (make-vector num nil))
 793         (let ((inhibit-quit t))
 794           (set (intern gname groups) group))
 795         (or scan-msgs (throw 'return t)))
 796       (setq flist (nnmaildir--grp-flist group)
 797             files (mapcar
 798                    (lambda (file)
 799                      (and (null (nnmaildir--flist-art flist (car file)))
 800                           file))
 801                    files)
 802             files (delq nil files)
 803             files (mapcar 'nnmaildir--parse-filename files)
 804             files (sort files 'nnmaildir--sort-files))
 805       (dolist (file files)
 806         (setq file (if (consp file) file (aref file 3))
 807               x (make-nnmaildir--art :prefix (car file) :suffix (cdr file)))
 808         (nnmaildir--grp-add-art nnmaildir--cur-server group x))
 809       (if read-only (setf (nnmaildir--grp-new group) nattr)
 810         (setf (nnmaildir--grp-cur group) cattr)))
 811     t))
 812
 813 (defun nnmaildir-request-scan (&optional scan-group server)
 814   (let ((coding-system-for-write nnheader-file-coding-system)
 815         (buffer-file-coding-system nil)
 816         (file-coding-system-alist nil)
 817         (nnmaildir-get-new-mail t)
 818         (nnmaildir-group-alist nil)
 819         (nnmaildir-active-file nil)
 820         x srv-ls srv-dir method groups target-prefix group dirs grp-dir seen
 821         deactivate-mark)
 822     (nnmaildir--prepare server nil)
 823     (setq srv-ls (nnmaildir--srv-ls nnmaildir--cur-server)
 824           srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
 825           method (nnmaildir--srv-method nnmaildir--cur-server)
 826           groups (nnmaildir--srv-groups nnmaildir--cur-server)
 827           target-prefix (nnmaildir--srv-target-prefix nnmaildir--cur-server))
 828     (nnmaildir--with-work-buffer
 829       (save-match-data
 830         (if (stringp scan-group)
 831             (if (nnmaildir--scan scan-group t groups method srv-dir srv-ls)
 832                 (if (nnmaildir--srv-gnm nnmaildir--cur-server)
 833                     (nnmail-get-new-mail 'nnmaildir nil nil scan-group))
 834               (unintern scan-group groups))
 835           (setq x (nth 5 (file-attributes srv-dir))
 836                 scan-group (null scan-group))
 837           (if (equal x (nnmaildir--srv-mtime nnmaildir--cur-server))
 838               (if scan-group
 839                   (mapatoms (lambda (sym)
 840                               (nnmaildir--scan (symbol-name sym) t groups
 841                                                method srv-dir srv-ls))
 842                             groups))
 843             (setq dirs (funcall srv-ls srv-dir nil "\\`[^.]" 'nosort)
 844                   dirs (if (zerop (length target-prefix))
 845                            dirs
 846                          (gnus-remove-if
 847                           (lambda (dir)
 848                             (and (>= (length dir) (length target-prefix))
 849                                  (string= (substring dir 0
 850                                                      (length target-prefix))
 851                                           target-prefix)))
 852                           dirs))
 853                   seen (nnmaildir--up2-1 (length dirs))
 854                   seen (make-vector seen 0))
 855             (dolist (grp-dir dirs)
 856               (if (nnmaildir--scan grp-dir scan-group groups method srv-dir
 857                                    srv-ls)
 858                   (intern grp-dir seen)))
 859             (setq x nil)
 860             (mapatoms (lambda (group)
 861                         (setq group (symbol-name group))
 862                         (unless (intern-soft group seen)
 863                           (setq x (cons group x))))
 864                       groups)
 865             (dolist (grp x)
 866               (unintern grp groups))
 867             (setf (nnmaildir--srv-mtime nnmaildir--cur-server)
 868                   (nth 5 (file-attributes srv-dir))))
 869           (and scan-group
 870                (nnmaildir--srv-gnm nnmaildir--cur-server)
 871                (nnmail-get-new-mail 'nnmaildir nil nil))))))
 872   t)
 873
 874 (defun nnmaildir-request-list (&optional server)
 875   (nnmaildir-request-scan 'find-new-groups server)
 876   (let (pgname ro deactivate-mark)
 877     (nnmaildir--prepare server nil)
 878     (nnmaildir--with-nntp-buffer
 879       (erase-buffer)
 880       (mapatoms (lambda (group)
 881                   (setq pgname (symbol-name group)
 882                         pgname (nnmaildir--pgname nnmaildir--cur-server pgname)
 883                         group (symbol-value group)
 884                         ro (nnmaildir--param pgname 'read-only))
 885                   (insert (gnus-replace-in-string
 886                            (nnmaildir--grp-name group) " " "\\ " t)
 887                           " ")
 888                   (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
 889                          nntp-server-buffer)
 890                   (insert " ")
 891                   (princ (nnmaildir--grp-min group) nntp-server-buffer)
 892                   (insert " " (if ro "n" "y") "\n"))
 893                 (nnmaildir--srv-groups nnmaildir--cur-server))))
 894   t)
 895
 896 (defun nnmaildir-request-newgroups (date &optional server)
 897   (nnmaildir-request-list server))
 898
 899 (defun nnmaildir-retrieve-groups (groups &optional server)
 900   (let (group deactivate-mark)
 901     (nnmaildir--prepare server nil)
 902     (nnmaildir--with-nntp-buffer
 903       (erase-buffer)
 904       (dolist (gname groups)
 905         (setq group (nnmaildir--prepare nil gname))
 906         (if (null group) (insert "411 no such news group\n")
 907           (insert "211 ")
 908           (princ (nnmaildir--grp-count group) nntp-server-buffer)
 909           (insert " ")
 910           (princ (nnmaildir--grp-min   group) nntp-server-buffer)
 911           (insert " ")
 912           (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
 913                  nntp-server-buffer)
 914           (insert " "
 915                   (gnus-replace-in-string gname " " "\\ " t)
 916                   "\n")))))
 917   'group)
 918
 919 (defun nnmaildir-request-marks (gname info &optional server)
 920   (let ((group (nnmaildir--prepare server gname))
 921         pgname flist always-marks never-marks old-marks dotfile num dir
 922         markdirs marks mark ranges markdir article read end new-marks ls
 923         old-mmth new-mmth mtime mark-sym existing missing deactivate-mark
 924         article-list)
 925     (catch 'return
 926       (unless group
 927         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 928               (concat "No such group: " gname))
 929         (throw 'return nil))
 930       (setq gname (nnmaildir--grp-name group)
 931             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
 932             flist (nnmaildir--grp-flist group))
 933       (when (zerop (nnmaildir--grp-count group))
 934         (gnus-info-set-read info nil)
 935         (gnus-info-set-marks info nil 'extend)
 936         (throw 'return info))
 937       (setq old-marks (cons 'read (gnus-info-read info))
 938             old-marks (cons old-marks (gnus-info-marks info))
 939             always-marks (nnmaildir--param pgname 'always-marks)
 940             never-marks (nnmaildir--param pgname 'never-marks)
 941             existing (nnmaildir--grp-nlist group)
 942             existing (mapcar 'car existing)
 943             existing (nreverse existing)
 944             existing (gnus-compress-sequence existing 'always-list)
 945             missing (list (cons 1 (nnmaildir--group-maxnum
 946                                    nnmaildir--cur-server group)))
 947             missing (gnus-range-difference missing existing)
 948             dir (nnmaildir--srv-dir nnmaildir--cur-server)
 949             dir (nnmaildir--srvgrp-dir dir gname)
 950             dir (nnmaildir--nndir dir)
 951             dir (nnmaildir--marks-dir dir)
 952             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
 953             markdirs (funcall ls dir nil "\\`[^.]" 'nosort)
 954             new-mmth (nnmaildir--up2-1 (length markdirs))
 955             new-mmth (make-vector new-mmth 0)
 956             old-mmth (nnmaildir--grp-mmth group))
 957       (dolist (mark markdirs)
 958         (setq markdir (nnmaildir--subdir dir mark)
 959               mark-sym (intern mark)
 960               ranges nil)
 961         (catch 'got-ranges
 962           (if (memq mark-sym never-marks) (throw 'got-ranges nil))
 963           (when (memq mark-sym always-marks)
 964             (setq ranges existing)
 965             (throw 'got-ranges nil))
 966           (setq mtime (nth 5 (file-attributes markdir)))
 967           (set (intern mark new-mmth) mtime)
 968           (when (equal mtime (symbol-value (intern-soft mark old-mmth)))
 969             (setq ranges (assq mark-sym old-marks))
 970             (if ranges (setq ranges (cdr ranges)))
 971             (throw 'got-ranges nil))
 972           (setq article-list nil)
 973           (dolist (prefix (funcall ls markdir nil "\\`[^.]" 'nosort))
 974             (setq article (nnmaildir--flist-art flist prefix))
 975             (if article
 976                 (setq article-list
 977                       (cons (nnmaildir--art-num article) article-list))))
 978           (setq ranges (gnus-add-to-range ranges (sort article-list '<))))
 979         (if (eq mark-sym 'read) (setq read ranges)
 980           (if ranges (setq marks (cons (cons mark-sym ranges) marks)))))
 981       (gnus-info-set-read info (gnus-range-add read missing))
 982       (gnus-info-set-marks info marks 'extend)
 983       (setf (nnmaildir--grp-mmth group) new-mmth)
 984       info)))
 985
 986 (defun nnmaildir-request-group (gname &optional server fast info)
 987   (let ((group (nnmaildir--prepare server gname))
 988         deactivate-mark)
 989     (catch 'return
 990       (unless group
 991         ;; (insert "411 no such news group\n")
 992         (setf (nnmaildir--srv-error nnmaildir--cur-server)
 993               (concat "No such group: " gname))
 994         (throw 'return nil))
 995       (setf (nnmaildir--srv-curgrp nnmaildir--cur-server) group)
 996       (if fast (throw 'return t))
 997       (nnmaildir--with-nntp-buffer
 998         (erase-buffer)
 999         (insert "211 ")
1000         (princ (nnmaildir--grp-count group) nntp-server-buffer)
1001         (insert " ")
1002         (princ (nnmaildir--grp-min   group) nntp-server-buffer)
1003         (insert " ")
1004         (princ (nnmaildir--group-maxnum nnmaildir--cur-server group)
1005                nntp-server-buffer)
1006         (insert " " (gnus-replace-in-string gname " " "\\ " t) "\n")
1007         t))))
1008
1009 (defun nnmaildir-request-create-group (gname &optional server args)
1010   (nnmaildir--prepare server nil)
1011   (catch 'return
1012     (let ((target-prefix (nnmaildir--srv-target-prefix nnmaildir--cur-server))
1013           srv-dir dir groups)
1014       (when (zerop (length gname))
1015         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1016               "Invalid (empty) group name")
1017         (throw 'return nil))
1018       (when (eq (aref "." 0) (aref gname 0))
1019         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1020               "Group names may not start with \".\"")
1021         (throw 'return nil))
1022       (when (save-match-data (string-match "[\0/\t]" gname))
1023         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1024               (concat "Invalid characters (null, tab, or /) in group name: "
1025                       gname))
1026         (throw 'return nil))
1027       (setq groups (nnmaildir--srv-groups nnmaildir--cur-server))
1028       (when (intern-soft gname groups)
1029         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1030               (concat "Group already exists: " gname))
1031         (throw 'return nil))
1032       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server))
1033       (if (file-name-absolute-p target-prefix)
1034           (setq dir (expand-file-name target-prefix))
1035         (setq dir srv-dir
1036               dir (file-truename dir)
1037               dir (concat dir target-prefix)))
1038       (setq dir (nnmaildir--subdir dir gname))
1039       (nnmaildir--mkdir dir)
1040       (nnmaildir--mkdir (nnmaildir--tmp dir))
1041       (nnmaildir--mkdir (nnmaildir--new dir))
1042       (nnmaildir--mkdir (nnmaildir--cur dir))
1043       (unless (string= target-prefix "")
1044         (make-symbolic-link (concat target-prefix gname)
1045                             (concat srv-dir gname)))
1046       (nnmaildir-request-scan 'find-new-groups))))
1047
1048 (defun nnmaildir-request-rename-group (gname new-name &optional server)
1049   (let ((group (nnmaildir--prepare server gname))
1050         (coding-system-for-write nnheader-file-coding-system)
1051         (buffer-file-coding-system nil)
1052         (file-coding-system-alist nil)
1053         srv-dir x groups)
1054     (catch 'return
1055       (unless group
1056         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1057               (concat "No such group: " gname))
1058         (throw 'return nil))
1059       (when (zerop (length new-name))
1060         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1061               "Invalid (empty) group name")
1062         (throw 'return nil))
1063       (when (eq (aref "." 0) (aref new-name 0))
1064         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1065               "Group names may not start with \".\"")
1066         (throw 'return nil))
1067       (when (save-match-data (string-match "[\0/\t]" new-name))
1068         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1069               (concat "Invalid characters (null, tab, or /) in group name: "
1070                       new-name))
1071         (throw 'return nil))
1072       (if (string-equal gname new-name) (throw 'return t))
1073       (when (intern-soft new-name
1074                          (nnmaildir--srv-groups nnmaildir--cur-server))
1075         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1076               (concat "Group already exists: " new-name))
1077         (throw 'return nil))
1078       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server))
1079       (condition-case err
1080           (rename-file (concat srv-dir gname)
1081                        (concat srv-dir new-name))
1082         (error
1083          (setf (nnmaildir--srv-error nnmaildir--cur-server)
1084                (concat "Error renaming link: " (prin1-to-string err)))
1085          (throw 'return nil)))
1086       (setq x (nnmaildir--srv-groups nnmaildir--cur-server)
1087             groups (make-vector (length x) 0))
1088       (mapatoms (lambda (sym)
1089                   (unless (eq (symbol-value sym) group)
1090                     (set (intern (symbol-name sym) groups)
1091                          (symbol-value sym))))
1092                 x)
1093       (setq group (copy-sequence group))
1094       (setf (nnmaildir--grp-name group) new-name)
1095       (set (intern new-name groups) group)
1096       (setf (nnmaildir--srv-groups nnmaildir--cur-server) groups)
1097       t)))
1098
1099 (defun nnmaildir-request-delete-group (gname force &optional server)
1100   (let ((group (nnmaildir--prepare server gname))
1101         pgname grp-dir target dir ls deactivate-mark)
1102     (catch 'return
1103       (unless group
1104         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1105               (concat "No such group: " gname))
1106         (throw 'return nil))
1107       (setq gname (nnmaildir--grp-name group)
1108             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1109             grp-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1110             target (car (file-attributes (concat grp-dir gname)))
1111             grp-dir (nnmaildir--srvgrp-dir grp-dir gname))
1112       (unless (or force (stringp target))
1113         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1114               (concat "Not a symlink: " gname))
1115         (throw 'return nil))
1116       (if (eq group (nnmaildir--srv-curgrp nnmaildir--cur-server))
1117           (setf (nnmaildir--srv-curgrp nnmaildir--cur-server) nil))
1118       (unintern gname (nnmaildir--srv-groups nnmaildir--cur-server))
1119       (if (not force)
1120           (progn
1121             (setq grp-dir (directory-file-name grp-dir))
1122             (nnmaildir--unlink grp-dir))
1123         (setq ls (nnmaildir--group-ls nnmaildir--cur-server pgname))
1124         (if (nnmaildir--param pgname 'read-only)
1125             (progn (delete-directory  (nnmaildir--tmp grp-dir))
1126                    (nnmaildir--unlink (nnmaildir--new grp-dir))
1127                    (delete-directory  (nnmaildir--cur grp-dir)))
1128           (nnmaildir--delete-dir-files (nnmaildir--tmp grp-dir) ls)
1129           (nnmaildir--delete-dir-files (nnmaildir--new grp-dir) ls)
1130           (nnmaildir--delete-dir-files (nnmaildir--cur grp-dir) ls))
1131         (setq dir (nnmaildir--nndir grp-dir))
1132         (dolist (subdir `(,(nnmaildir--nov-dir dir) ,(nnmaildir--num-dir dir)
1133                           ,@(funcall ls (nnmaildir--marks-dir dir)
1134                                      'full "\\`[^.]" 'nosort)))
1135           (nnmaildir--delete-dir-files subdir ls))
1136         (setq dir (nnmaildir--nndir grp-dir))
1137         (nnmaildir--unlink (concat dir "markfile"))
1138         (nnmaildir--unlink (concat dir "markfile{new}"))
1139         (delete-directory (nnmaildir--marks-dir dir))
1140         (delete-directory dir)
1141         (if (not (stringp target))
1142             (delete-directory grp-dir)
1143           (setq grp-dir (directory-file-name grp-dir)
1144                 dir target)
1145           (unless (eq (aref "/" 0) (aref dir 0))
1146             (setq dir (concat (file-truename
1147                                (nnmaildir--srv-dir nnmaildir--cur-server))
1148                               dir)))
1149           (delete-directory dir)
1150           (nnmaildir--unlink grp-dir)))
1151       t)))
1152
1153 (defun nnmaildir-retrieve-headers (articles &optional gname server fetch-old)
1154   (let ((group (nnmaildir--prepare server gname))
1155         srv-dir dir nlist mlist article num start stop nov nlist2 insert-nov
1156         deactivate-mark)
1157     (setq insert-nov
1158           (lambda (article)
1159             (setq nov (nnmaildir--update-nov nnmaildir--cur-server group
1160                                              article))
1161             (when nov
1162               (nnmaildir--cache-nov group article nov)
1163               (setq num (nnmaildir--art-num article))
1164               (princ num nntp-server-buffer)
1165               (insert "\t" (nnmaildir--nov-get-beg nov) "\t"
1166                       (nnmaildir--art-msgid article) "\t"
1167                       (nnmaildir--nov-get-mid nov) "\tXref: nnmaildir "
1168                       (gnus-replace-in-string gname " " "\\ " t) ":")
1169               (princ num nntp-server-buffer)
1170               (insert "\t" (nnmaildir--nov-get-end nov) "\n"))))
1171     (catch 'return
1172       (unless group
1173         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1174               (if gname (concat "No such group: " gname) "No current group"))
1175         (throw 'return nil))
1176       (nnmaildir--with-nntp-buffer
1177         (erase-buffer)
1178         (setq mlist (nnmaildir--grp-mlist group)
1179               nlist (nnmaildir--grp-nlist group)
1180               gname (nnmaildir--grp-name group)
1181               srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1182               dir (nnmaildir--srvgrp-dir srv-dir gname))
1183         (cond
1184          ((null nlist))
1185          ((and fetch-old (not (numberp fetch-old)))
1186           (nnmaildir--nlist-iterate nlist 'all insert-nov))
1187          ((null articles))
1188          ((stringp (car articles))
1189           (dolist (msgid articles)
1190             (setq article (nnmaildir--mlist-art mlist msgid))
1191             (if article (funcall insert-nov article))))
1192          (t
1193           (if fetch-old
1194               ;; Assume the article range list is sorted ascending
1195               (setq stop (car articles)
1196                     start (car (last articles))
1197                     stop  (if (numberp stop)  stop  (car stop))
1198                     start (if (numberp start) start (cdr start))
1199                     stop (- stop fetch-old)
1200                     stop (if (< stop 1) 1 stop)
1201                     articles (list (cons stop start))))
1202           (nnmaildir--nlist-iterate nlist articles insert-nov)))
1203         (sort-numeric-fields 1 (point-min) (point-max))
1204         'nov))))
1205
1206 (defun nnmaildir-request-article (num-msgid &optional gname server to-buffer)
1207   (let ((group (nnmaildir--prepare server gname))
1208         (case-fold-search t)
1209         list article dir pgname deactivate-mark)
1210     (catch 'return
1211       (unless group
1212         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1213               (if gname (concat "No such group: " gname) "No current group"))
1214         (throw 'return nil))
1215       (if (numberp num-msgid)
1216           (setq article (nnmaildir--nlist-art group num-msgid))
1217         (setq list (nnmaildir--grp-mlist group)
1218               article (nnmaildir--mlist-art list num-msgid))
1219         (if article (setq num-msgid (nnmaildir--art-num article))
1220           (catch 'found
1221             (mapatoms
1222               (lambda (group-sym)
1223                 (setq group (symbol-value group-sym)
1224                       list (nnmaildir--grp-mlist group)
1225                       article (nnmaildir--mlist-art list num-msgid))
1226                 (when article
1227                   (setq num-msgid (nnmaildir--art-num article))
1228                   (throw 'found nil)))
1229               (nnmaildir--srv-groups nnmaildir--cur-server))))
1230         (unless article
1231           (setf (nnmaildir--srv-error nnmaildir--cur-server) "No such article")
1232           (throw 'return nil)))
1233       (setq gname (nnmaildir--grp-name group)
1234             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1235             dir (nnmaildir--srv-dir nnmaildir--cur-server)
1236             dir (nnmaildir--srvgrp-dir dir gname)
1237             dir (if (nnmaildir--param pgname 'read-only)
1238                     (nnmaildir--new dir) (nnmaildir--cur dir))
1239             nnmaildir-article-file-name
1240             (concat dir
1241                     (nnmaildir--art-prefix article)
1242                     (nnmaildir--art-suffix article)))
1243       (unless (file-exists-p nnmaildir-article-file-name)
1244         (nnmaildir--expired-article group article)
1245         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1246               "Article has expired")
1247         (throw 'return nil))
1248       (with-current-buffer (or to-buffer nntp-server-buffer)
1249         (erase-buffer)
1250         (nnheader-insert-file-contents nnmaildir-article-file-name))
1251       (cons gname num-msgid))))
1252
1253 (defun nnmaildir-request-post (&optional server)
1254   (let (message-required-mail-headers)
1255     (funcall message-send-mail-function)))
1256
1257 (defun nnmaildir-request-replace-article (number gname buffer)
1258   (let ((group (nnmaildir--prepare nil gname))
1259         (coding-system-for-write nnheader-file-coding-system)
1260         (buffer-file-coding-system nil)
1261         (file-coding-system-alist nil)
1262         dir file article suffix tmpfile deactivate-mark)
1263     (catch 'return
1264       (unless group
1265         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1266               (concat "No such group: " gname))
1267         (throw 'return nil))
1268       (when (nnmaildir--param (nnmaildir--pgname nnmaildir--cur-server gname)
1269                               'read-only)
1270         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1271               (concat "Read-only group: " group))
1272         (throw 'return nil))
1273       (setq dir (nnmaildir--srv-dir nnmaildir--cur-server)
1274             dir (nnmaildir--srvgrp-dir dir gname)
1275             article (nnmaildir--nlist-art group number))
1276       (unless article
1277         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1278               (concat "No such article: " (number-to-string number)))
1279         (throw 'return nil))
1280       (setq suffix (nnmaildir--art-suffix article)
1281             file (nnmaildir--art-prefix article)
1282             tmpfile (concat (nnmaildir--tmp dir) file))
1283       (when (file-exists-p tmpfile)
1284         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1285               (concat "File exists: " tmpfile))
1286         (throw 'return nil))
1287       (with-current-buffer buffer
1288         (gmm-write-region (point-min) (point-max) tmpfile nil 'no-message nil
1289                           'excl))
1290       (unix-sync) ;; no fsync :(
1291       (rename-file tmpfile (concat (nnmaildir--cur dir) file suffix) 'replace)
1292       t)))
1293
1294 (defun nnmaildir-request-move-article (article gname server accept-form
1295                                                &optional last move-is-internal)
1296   (let ((group (nnmaildir--prepare server gname))
1297         pgname suffix result nnmaildir--file deactivate-mark)
1298     (catch 'return
1299       (unless group
1300         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1301               (concat "No such group: " gname))
1302         (throw 'return nil))
1303       (setq gname (nnmaildir--grp-name group)
1304             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1305             article (nnmaildir--nlist-art group article))
1306       (unless article
1307         (setf (nnmaildir--srv-error nnmaildir--cur-server) "No such article")
1308         (throw 'return nil))
1309       (setq suffix (nnmaildir--art-suffix article)
1310             nnmaildir--file (nnmaildir--srv-dir nnmaildir--cur-server)
1311             nnmaildir--file (nnmaildir--srvgrp-dir nnmaildir--file gname)
1312             nnmaildir--file (if (nnmaildir--param pgname 'read-only)
1313                                 (nnmaildir--new nnmaildir--file)
1314                               (nnmaildir--cur nnmaildir--file))
1315             nnmaildir--file (concat nnmaildir--file
1316                                     (nnmaildir--art-prefix article)
1317                                     suffix))
1318       (unless (file-exists-p nnmaildir--file)
1319         (nnmaildir--expired-article group article)
1320         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1321               "Article has expired")
1322         (throw 'return nil))
1323       (nnmaildir--with-move-buffer
1324         (erase-buffer)
1325         (nnheader-insert-file-contents nnmaildir--file)
1326         (setq result (eval accept-form)))
1327       (unless (or (null result) (nnmaildir--param pgname 'read-only))
1328         (nnmaildir--unlink nnmaildir--file)
1329         (nnmaildir--expired-article group article))
1330       result)))
1331
1332 (defun nnmaildir-request-accept-article (gname &optional server last)
1333   (let ((group (nnmaildir--prepare server gname))
1334         (coding-system-for-write nnheader-file-coding-system)
1335         (buffer-file-coding-system nil)
1336         (file-coding-system-alist nil)
1337         srv-dir dir file time tmpfile curfile 24h article)
1338     (catch 'return
1339       (unless group
1340         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1341               (concat "No such group: " gname))
1342         (throw 'return nil))
1343       (setq gname (nnmaildir--grp-name group))
1344       (when (nnmaildir--param (nnmaildir--pgname nnmaildir--cur-server gname)
1345                               'read-only)
1346         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1347               (concat "Read-only group: " gname))
1348         (throw 'return nil))
1349       (setq srv-dir (nnmaildir--srv-dir nnmaildir--cur-server)
1350             dir (nnmaildir--srvgrp-dir srv-dir gname)
1351             time (current-time)
1352             file (format-time-string "%s." time))
1353       (unless (string-equal nnmaildir--delivery-time file)
1354         (setq nnmaildir--delivery-time file
1355               nnmaildir--delivery-count 0))
1356       (when (and (consp (cdr time))
1357                  (consp (cddr time)))
1358         (setq file (concat file "M" (number-to-string (caddr time)))))
1359       (setq file (concat file nnmaildir--delivery-pid)
1360             file (concat file "Q" (number-to-string nnmaildir--delivery-count))
1361             file (concat file "." (nnmaildir--system-name))
1362             tmpfile (concat (nnmaildir--tmp dir) file)
1363             curfile (concat (nnmaildir--cur dir) file ":2,"))
1364       (when (file-exists-p tmpfile)
1365         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1366               (concat "File exists: " tmpfile))
1367         (throw 'return nil))
1368       (when (file-exists-p curfile)
1369         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1370               (concat "File exists: " curfile))
1371         (throw 'return nil))
1372       (setq nnmaildir--delivery-count (1+ nnmaildir--delivery-count)
1373             24h (run-with-timer 86400 nil
1374                                 (lambda ()
1375                                   (nnmaildir--unlink tmpfile)
1376                                   (setf (nnmaildir--srv-error
1377                                           nnmaildir--cur-server)
1378                                         "24-hour timer expired")
1379                                   (throw 'return nil))))
1380       (condition-case nil (add-name-to-file nnmaildir--file tmpfile)
1381         (error
1382          (gmm-write-region (point-min) (point-max) tmpfile nil 'no-message nil
1383                            'excl)
1384          (when (fboundp 'unix-sync)
1385            (unix-sync)))) ;; no fsync :(
1386       (nnheader-cancel-timer 24h)
1387       (condition-case err
1388           (add-name-to-file tmpfile curfile)
1389         (error
1390          (setf (nnmaildir--srv-error nnmaildir--cur-server)
1391                (concat "Error linking: " (prin1-to-string err)))
1392          (nnmaildir--unlink tmpfile)
1393          (throw 'return nil)))
1394       (nnmaildir--unlink tmpfile)
1395       (setq article (make-nnmaildir--art :prefix file :suffix ":2,"))
1396       (if (nnmaildir--grp-add-art nnmaildir--cur-server group article)
1397           (cons gname (nnmaildir--art-num article))))))
1398
1399 (defun nnmaildir-save-mail (group-art)
1400   (catch 'return
1401     (unless group-art
1402       (throw 'return nil))
1403     (let (ga gname x groups nnmaildir--file deactivate-mark)
1404       (save-excursion
1405         (goto-char (point-min))
1406         (save-match-data
1407           (while (looking-at "From ")
1408             (replace-match "X-From-Line: ")
1409             (forward-line 1))))
1410       (setq groups (nnmaildir--srv-groups nnmaildir--cur-server)
1411             ga (car group-art) group-art (cdr group-art)
1412             gname (car ga))
1413       (or (intern-soft gname groups)
1414           (nnmaildir-request-create-group gname)
1415           (throw 'return nil)) ;; not that nnmail bothers to check :(
1416       (unless (nnmaildir-request-accept-article gname)
1417         (throw 'return nil))
1418       (setq nnmaildir--file (nnmaildir--srv-dir nnmaildir--cur-server)
1419             nnmaildir--file (nnmaildir--srvgrp-dir nnmaildir--file gname)
1420             x (nnmaildir--prepare nil gname)
1421             x (nnmaildir--grp-nlist x)
1422             x (cdar x)
1423             nnmaildir--file (concat nnmaildir--file
1424                                     (nnmaildir--art-prefix x)
1425                                     (nnmaildir--art-suffix x)))
1426       (delq nil
1427             (mapcar
1428              (lambda (ga)
1429                (setq gname (car ga))
1430                (and (or (intern-soft gname groups)
1431                         (nnmaildir-request-create-group gname))
1432                     (nnmaildir-request-accept-article gname)
1433                     ga))
1434              group-art)))))
1435
1436 (defun nnmaildir-active-number (gname)
1437   0)
1438
1439 (declare-function gnus-group-mark-article-read "gnus-group" (group article))
1440
1441 (defun nnmaildir-request-expire-articles (ranges &optional gname server force)
1442   (let ((no-force (not force))
1443         (group (nnmaildir--prepare server gname))
1444         pgname time boundary bound-iter high low target dir nlist nlist2
1445         stop article didnt nnmaildir--file nnmaildir-article-file-name
1446         deactivate-mark)
1447     (catch 'return
1448       (unless group
1449         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1450               (if gname (concat "No such group: " gname) "No current group"))
1451         (throw 'return (gnus-uncompress-range ranges)))
1452       (setq gname (nnmaildir--grp-name group)
1453             pgname (nnmaildir--pgname nnmaildir--cur-server gname))
1454       (if (nnmaildir--param pgname 'read-only)
1455           (throw 'return (gnus-uncompress-range ranges)))
1456       (setq time (nnmaildir--param pgname 'expire-age))
1457       (unless time
1458         (setq time (or (and nnmail-expiry-wait-function
1459                             (funcall nnmail-expiry-wait-function gname))
1460                        nnmail-expiry-wait))
1461         (if (eq time 'immediate)
1462             (setq time 0)
1463           (if (numberp time)
1464               (setq time (* time 86400)))))
1465       (when no-force
1466         (unless (integerp time) ;; handle 'never
1467           (throw 'return (gnus-uncompress-range ranges)))
1468         (setq boundary (current-time)
1469               high (- (car boundary) (/ time 65536))
1470               low (- (cadr boundary) (% time 65536)))
1471         (if (< low 0)
1472             (setq low (+ low 65536)
1473                   high (1- high)))
1474         (setcar (cdr boundary) low)
1475         (setcar boundary high))
1476       (setq dir (nnmaildir--srv-dir nnmaildir--cur-server)
1477             dir (nnmaildir--srvgrp-dir dir gname)
1478             dir (nnmaildir--cur dir)
1479             nlist (nnmaildir--grp-nlist group)
1480             ranges (reverse ranges))
1481       (nnmaildir--with-move-buffer
1482         (nnmaildir--nlist-iterate
1483          nlist ranges
1484          (lambda (article)
1485            (setq nnmaildir--file (nnmaildir--art-prefix article)
1486                  nnmaildir--file (concat dir nnmaildir--file
1487                                          (nnmaildir--art-suffix article))
1488                  time (file-attributes nnmaildir--file))
1489            (cond
1490             ((null time)
1491              (nnmaildir--expired-article group article))
1492             ((and no-force
1493                   (progn
1494                     (setq time (nth 5 time)
1495                           bound-iter boundary)
1496                     (while (and bound-iter time
1497                                 (= (car bound-iter) (car time)))
1498                       (setq bound-iter (cdr bound-iter)
1499                             time (cdr time)))
1500                     (and bound-iter time
1501                          (car-less-than-car bound-iter time))))
1502              (setq didnt (cons (nnmaildir--art-num article) didnt)))
1503             (t
1504              (setq nnmaildir-article-file-name nnmaildir--file
1505                    target (if force nil
1506                             (save-excursion
1507                               (save-restriction
1508                                 (nnmaildir--param pgname 'expire-group)))))
1509              (when (and (stringp target)
1510                         (not (string-equal target pgname))) ;; Move it.
1511                (erase-buffer)
1512                (nnheader-insert-file-contents nnmaildir--file)
1513                (let ((group-art (gnus-request-accept-article
1514                                  target nil nil 'no-encode)))
1515                  (when (consp group-art)
1516                    ;; Maybe also copy: dormant forward reply save tick
1517                    ;; (gnus-add-mark? gnus-request-set-mark?)
1518                    (gnus-group-mark-article-read target (cdr group-art)))))
1519              (if (equal target pgname)
1520                  ;; Leave it here.
1521                  (setq didnt (cons (nnmaildir--art-num article) didnt))
1522                (nnmaildir--unlink nnmaildir--file)
1523                (nnmaildir--expired-article group article))))))
1524         (erase-buffer))
1525       didnt)))
1526
1527 (defun nnmaildir-request-set-mark (gname actions &optional server)
1528   (let ((group (nnmaildir--prepare server gname))
1529         (coding-system-for-write nnheader-file-coding-system)
1530         (buffer-file-coding-system nil)
1531         (file-coding-system-alist nil)
1532         del-mark del-action add-action set-action marksdir nlist
1533         ranges begin end article all-marks todo-marks mdir mfile
1534         pgname ls permarkfile deactivate-mark)
1535     (setq del-mark
1536           (lambda (mark)
1537             (setq mfile (nnmaildir--subdir marksdir (symbol-name mark))
1538                   mfile (concat mfile (nnmaildir--art-prefix article)))
1539             (nnmaildir--unlink mfile))
1540           del-action (lambda (article) (mapcar del-mark todo-marks))
1541           add-action
1542           (lambda (article)
1543             (mapcar
1544              (lambda (mark)
1545                (setq mdir (nnmaildir--subdir marksdir (symbol-name mark))
1546                      permarkfile (concat mdir ":")
1547                      mfile (concat mdir (nnmaildir--art-prefix article)))
1548                (nnmaildir--condcase err (add-name-to-file permarkfile mfile)
1549                  (cond
1550                   ((nnmaildir--eexist-p err))
1551                   ((nnmaildir--enoent-p err)
1552                    (nnmaildir--mkdir mdir)
1553                    (nnmaildir--mkfile permarkfile)
1554                    (add-name-to-file permarkfile mfile))
1555                   ((nnmaildir--emlink-p err)
1556                    (let ((permarkfilenew (concat permarkfile "{new}")))
1557                      (nnmaildir--mkfile permarkfilenew)
1558                      (rename-file permarkfilenew permarkfile 'replace)
1559                      (add-name-to-file permarkfile mfile)))
1560                   (t (signal (car err) (cdr err))))))
1561              todo-marks))
1562           set-action (lambda (article)
1563                        (funcall add-action article)
1564                        (mapcar (lambda (mark)
1565                                  (unless (memq mark todo-marks)
1566                                    (funcall del-mark mark)))
1567                                all-marks)))
1568     (catch 'return
1569       (unless group
1570         (setf (nnmaildir--srv-error nnmaildir--cur-server)
1571               (concat "No such group: " gname))
1572         (dolist (action actions)
1573           (setq ranges (gnus-range-add ranges (car action))))
1574         (throw 'return ranges))
1575       (setq nlist (nnmaildir--grp-nlist group)
1576             marksdir (nnmaildir--srv-dir nnmaildir--cur-server)
1577             marksdir (nnmaildir--srvgrp-dir marksdir gname)
1578             marksdir (nnmaildir--nndir marksdir)
1579             marksdir (nnmaildir--marks-dir marksdir)
1580             gname (nnmaildir--grp-name group)
1581             pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1582             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
1583             all-marks (funcall ls marksdir nil "\\`[^.]" 'nosort)
1584             all-marks (mapcar 'intern all-marks))
1585       (dolist (action actions)
1586         (setq ranges (car action)
1587               todo-marks (caddr action))
1588         (dolist (mark todo-marks)
1589           (add-to-list 'all-marks mark))
1590         (if (numberp (cdr ranges)) (setq ranges (list ranges)))
1591         (nnmaildir--nlist-iterate nlist ranges
1592                                   (cond ((eq 'del (cadr action)) del-action)
1593                                         ((eq 'add (cadr action)) add-action)
1594                                         ((eq 'set (cadr action)) set-action))))
1595       nil)))
1596
1597 (defun nnmaildir-close-group (gname &optional server)
1598   (let ((group (nnmaildir--prepare server gname))
1599         pgname ls dir msgdir files flist dirs)
1600     (if (null group)
1601         (progn
1602           (setf (nnmaildir--srv-error nnmaildir--cur-server)
1603                 (concat "No such group: " gname))
1604           nil)
1605       (setq pgname (nnmaildir--pgname nnmaildir--cur-server gname)
1606             ls (nnmaildir--group-ls nnmaildir--cur-server pgname)
1607             dir (nnmaildir--srv-dir nnmaildir--cur-server)
1608             dir (nnmaildir--srvgrp-dir dir gname)
1609             msgdir (if (nnmaildir--param pgname 'read-only)
1610                        (nnmaildir--new dir) (nnmaildir--cur dir))
1611             dir (nnmaildir--nndir dir)
1612             dirs (cons (nnmaildir--nov-dir dir)
1613                        (funcall ls (nnmaildir--marks-dir dir) 'full "\\`[^.]"
1614                                 'nosort))
1615             dirs (mapcar
1616                   (lambda (dir)
1617                     (cons dir (funcall ls dir nil "\\`[^.]" 'nosort)))
1618                   dirs)
1619             files (funcall ls msgdir nil "\\`[^.]" 'nosort)
1620             flist (nnmaildir--up2-1 (length files))
1621             flist (make-vector flist 0))
1622       (save-match-data
1623         (dolist (file files)
1624           (string-match "\\`\\([^:]*\\)\\(:.*\\)?\\'" file)
1625           (intern (match-string 1 file) flist)))
1626       (dolist (dir dirs)
1627         (setq files (cdr dir)
1628               dir (file-name-as-directory (car dir)))
1629         (dolist (file files)
1630           (unless (or (intern-soft file flist) (string= file ":"))
1631             (setq file (concat dir file))
1632             (delete-file file))))
1633       t)))
1634
1635 (defun nnmaildir-close-server (&optional server)
1636   (let (flist ls dirs dir files file x)
1637     (nnmaildir--prepare server nil)
1638     (when nnmaildir--cur-server
1639       (setq server nnmaildir--cur-server
1640             nnmaildir--cur-server nil)
1641       (unintern (nnmaildir--srv-address server) nnmaildir--servers)))
1642   t)
1643
1644 (defun nnmaildir-request-close ()
1645   (let (servers buffer)
1646     (mapatoms (lambda (server)
1647                 (setq servers (cons (symbol-name server) servers)))
1648               nnmaildir--servers)
1649     (mapc 'nnmaildir-close-server servers)
1650     (setq buffer (get-buffer " *nnmaildir work*"))
1651     (if buffer (kill-buffer buffer))
1652     (setq buffer (get-buffer " *nnmaildir nov*"))
1653     (if buffer (kill-buffer buffer))
1654     (setq buffer (get-buffer " *nnmaildir move*"))
1655     (if buffer (kill-buffer buffer)))
1656   t)
1657
1658 (provide 'nnmaildir)
1659
1660 ;; Local Variables:
1661 ;; indent-tabs-mode: t
1662 ;; fill-column: 77
1663 ;; End:
1664
1665 ;;; nnmaildir.el ends here