2005-06-14 [colin] 1.9.11cvs65
[claws.git] / src / imap.c
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2005 Hiroyuki Yamamoto
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20 #ifdef HAVE_CONFIG_H
21 #  include "config.h"
22 #endif
23
24 #include "defs.h"
25
26 #include <glib.h>
27 #include <glib/gi18n.h>
28 #include <stdio.h>
29 #include <string.h>
30 #include <stdlib.h>
31 #include <dirent.h>
32 #include <unistd.h>
33 #include <ctype.h>
34 #include <time.h>
35 #if HAVE_ICONV
36 #  include <iconv.h>
37 #endif
38
39 #if USE_OPENSSL
40 #  include "ssl.h"
41 #endif
42 #include "folder.h"
43 #include "session.h"
44 #include "procmsg.h"
45 #include "imap.h"
46 #include "imap_gtk.h"
47 #include "socket.h"
48 #include "ssl.h"
49 #include "recv.h"
50 #include "procheader.h"
51 #include "prefs_account.h"
52 #include "codeconv.h"
53 #include "md5.h"
54 #include "base64.h"
55 #include "utils.h"
56 #include "prefs_common.h"
57 #include "inputdialog.h"
58 #include "log.h"
59 #include "remotefolder.h"
60 #include "alertpanel.h"
61 #include "sylpheed.h"
62 #include "statusbar.h"
63 #include "msgcache.h"
64
65 #ifdef USE_PTHREAD
66 #include <pthread.h>
67 #endif
68
69 typedef struct _IMAPFolder      IMAPFolder;
70 typedef struct _IMAPSession     IMAPSession;
71 typedef struct _IMAPNameSpace   IMAPNameSpace;
72 typedef struct _IMAPFolderItem  IMAPFolderItem;
73
74 #include "prefs_account.h"
75
76 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
77 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
78 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
79
80 struct _IMAPFolder
81 {
82         RemoteFolder rfolder;
83
84         /* list of IMAPNameSpace */
85         GList *ns_personal;
86         GList *ns_others;
87         GList *ns_shared;
88 };
89
90 struct _IMAPSession
91 {
92         Session session;
93
94         gboolean authenticated;
95
96         gchar **capability;
97         gboolean uidplus;
98
99         gchar *mbox;
100         guint cmd_count;
101
102         /* CLAWS */
103         gboolean folder_content_changed;
104         guint exists;
105 };
106
107 struct _IMAPNameSpace
108 {
109         gchar *name;
110         gchar separator;
111 };
112
113 #define IMAP_SUCCESS    0
114 #define IMAP_SOCKET     2
115 #define IMAP_AUTHFAIL   3
116 #define IMAP_PROTOCOL   4
117 #define IMAP_SYNTAX     5
118 #define IMAP_IOERR      6
119 #define IMAP_ERROR      7
120
121 #define IMAPBUFSIZE     8192
122
123 typedef enum
124 {
125         IMAP_FLAG_SEEN          = 1 << 0,
126         IMAP_FLAG_ANSWERED      = 1 << 1,
127         IMAP_FLAG_FLAGGED       = 1 << 2,
128         IMAP_FLAG_DELETED       = 1 << 3,
129         IMAP_FLAG_DRAFT         = 1 << 4
130 } IMAPFlags;
131
132 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
133 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
134 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
135 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
136 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
137
138
139 #define IMAP4_PORT      143
140 #if USE_OPENSSL
141 #define IMAPS_PORT      993
142 #endif
143
144 #define IMAP_CMD_LIMIT  1000
145
146 #define QUOTE_IF_REQUIRED(out, str)                             \
147 {                                                               \
148         if (*str != '"' && strpbrk(str, " \t(){}[]%*\\") != NULL) {     \
149                 gchar *__tmp;                                   \
150                 gint len;                                       \
151                                                                 \
152                 len = strlen(str) + 3;                          \
153                 Xalloca(__tmp, len, return IMAP_ERROR);         \
154                 g_snprintf(__tmp, len, "\"%s\"", str);          \
155                 out = __tmp;                                    \
156         } else {                                                \
157                 Xstrdup_a(out, str, return IMAP_ERROR);         \
158         }                                                       \
159 }
160
161 typedef gchar * IMAPSet;
162
163 struct _IMAPFolderItem
164 {
165         FolderItem item;
166
167         guint lastuid;
168         guint uid_next;
169         GSList *uid_list;
170         gboolean batching;
171 };
172
173 static void imap_folder_init            (Folder         *folder,
174                                          const gchar    *name,
175                                          const gchar    *path);
176
177 static Folder   *imap_folder_new        (const gchar    *name,
178                                          const gchar    *path);
179 static void      imap_folder_destroy    (Folder         *folder);
180
181 static IMAPSession *imap_session_new    (const PrefsAccount     *account);
182 static void     imap_session_authenticate(IMAPSession           *session,
183                                           const PrefsAccount    *account);
184 static void     imap_session_destroy    (Session        *session);
185
186 static gchar   *imap_fetch_msg          (Folder         *folder, 
187                                          FolderItem     *item, 
188                                          gint            uid);
189 static gchar   *imap_fetch_msg_full     (Folder         *folder, 
190                                          FolderItem     *item, 
191                                          gint            uid,
192                                          gboolean        headers,
193                                          gboolean        body);
194 static gint     imap_add_msg            (Folder         *folder,
195                                          FolderItem     *dest,
196                                          const gchar    *file, 
197                                          MsgFlags       *flags);
198 static gint     imap_add_msgs           (Folder         *folder, 
199                                          FolderItem     *dest,
200                                          GSList         *file_list,
201                                          GRelation      *relation);
202
203 static gint     imap_copy_msg           (Folder         *folder,
204                                          FolderItem     *dest, 
205                                          MsgInfo        *msginfo);
206 static gint     imap_copy_msgs          (Folder         *folder, 
207                                          FolderItem     *dest, 
208                                          MsgInfoList    *msglist, 
209                                          GRelation      *relation);
210
211 static gint     imap_remove_msg         (Folder         *folder, 
212                                          FolderItem     *item, 
213                                          gint            uid);
214 static gint     imap_remove_msgs        (Folder         *folder, 
215                                          FolderItem     *dest, 
216                                          MsgInfoList    *msglist, 
217                                          GRelation      *relation);
218 static gint     imap_remove_all_msg     (Folder         *folder, 
219                                          FolderItem     *item);
220
221 static gboolean imap_is_msg_changed     (Folder         *folder,
222                                          FolderItem     *item, 
223                                          MsgInfo        *msginfo);
224
225 static gint     imap_close              (Folder         *folder, 
226                                          FolderItem     *item);
227
228 static gint     imap_scan_tree          (Folder         *folder);
229
230 static gint     imap_create_tree        (Folder         *folder);
231
232 static FolderItem *imap_create_folder   (Folder         *folder,
233                                          FolderItem     *parent,
234                                          const gchar    *name);
235 static gint     imap_rename_folder      (Folder         *folder,
236                                          FolderItem     *item, 
237                                          const gchar    *name);
238 static gint     imap_remove_folder      (Folder         *folder, 
239                                          FolderItem     *item);
240
241 static FolderItem *imap_folder_item_new (Folder         *folder);
242 static void imap_folder_item_destroy    (Folder         *folder,
243                                          FolderItem     *item);
244
245 static IMAPSession *imap_session_get    (Folder         *folder);
246
247 static gint imap_greeting               (IMAPSession    *session);
248 static gint imap_auth                   (IMAPSession    *session,
249                                          const gchar    *user,
250                                          const gchar    *pass,
251                                          IMAPAuthType    type);
252
253 static gint imap_scan_tree_recursive    (IMAPSession    *session,
254                                          FolderItem     *item);
255 static GSList *imap_parse_list          (IMAPFolder     *folder,
256                                          IMAPSession    *session,
257                                          const gchar    *real_path,
258                                          gchar          *separator);
259
260 static void imap_create_missing_folders (Folder         *folder);
261 static FolderItem *imap_create_special_folder
262                                         (Folder                 *folder,
263                                          SpecialFolderItemType   stype,
264                                          const gchar            *name);
265
266 static gint imap_do_copy_msgs           (Folder         *folder,
267                                          FolderItem     *dest,
268                                          MsgInfoList    *msglist,
269                                          GRelation      *relation);
270
271 static void imap_delete_all_cached_messages     (FolderItem     *item);
272 static void imap_set_batch              (Folder         *folder,
273                                          FolderItem     *item,
274                                          gboolean        batch);
275 #if USE_OPENSSL
276 static SockInfo *imap_open              (const gchar    *server,
277                                          gushort         port,
278                                          SSLType         ssl_type);
279 #else
280 static SockInfo *imap_open              (const gchar    *server,
281                                          gushort         port);
282 #endif
283
284 #if USE_OPENSSL
285 static SockInfo *imap_open_tunnel(const gchar *server,
286                                   const gchar *tunnelcmd,
287                                   SSLType ssl_type);
288 #else
289 static SockInfo *imap_open_tunnel(const gchar *server,
290                                   const gchar *tunnelcmd);
291 #endif
292
293 #if USE_OPENSSL
294 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type);
295 #else
296 static SockInfo *imap_init_sock(SockInfo *sock);
297 #endif
298
299 static gchar *imap_get_flag_str         (IMAPFlags       flags);
300 static gint imap_set_message_flags      (IMAPSession    *session,
301                                          MsgNumberList  *numlist,
302                                          IMAPFlags       flags,
303                                          gboolean        is_set);
304 static gint imap_select                 (IMAPSession    *session,
305                                          IMAPFolder     *folder,
306                                          const gchar    *path,
307                                          gint           *exists,
308                                          gint           *recent,
309                                          gint           *unseen,
310                                          guint32        *uid_validity,
311                                          gboolean        block);
312 static gint imap_status                 (IMAPSession    *session,
313                                          IMAPFolder     *folder,
314                                          const gchar    *path,
315                                          gint           *messages,
316                                          gint           *recent,
317                                          guint32        *uid_next,
318                                          guint32        *uid_validity,
319                                          gint           *unseen,
320                                          gboolean        block);
321
322 static void imap_parse_namespace                (IMAPSession    *session,
323                                                  IMAPFolder     *folder);
324 static void imap_get_namespace_by_list          (IMAPSession    *session,
325                                                  IMAPFolder     *folder);
326 static IMAPNameSpace *imap_find_namespace       (IMAPFolder     *folder,
327                                                  const gchar    *path);
328 static gchar imap_get_path_separator            (IMAPFolder     *folder,
329                                                  const gchar    *path);
330 static gchar *imap_get_real_path                (IMAPFolder     *folder,
331                                                  const gchar    *path);
332
333 static gchar *imap_parse_atom           (SockInfo       *sock,
334                                          gchar          *src,
335                                          gchar          *dest,
336                                          gint            dest_len,
337                                          GString        *str);
338 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
339 static MsgInfo *imap_parse_envelope     (SockInfo       *sock,
340                                          FolderItem     *item,
341                                          GString        *line_str);
342
343 static gboolean imap_has_capability     (IMAPSession    *session,
344                                          const gchar    *cap);
345 static void imap_free_capabilities      (IMAPSession    *session);
346
347 /* low-level IMAP4rev1 commands */
348 static gint imap_cmd_authenticate
349                                 (IMAPSession    *session,
350                                  const gchar    *user,
351                                  const gchar    *pass,
352                                  IMAPAuthType    type);
353 static gint imap_cmd_login      (IMAPSession    *session,
354                                  const gchar    *user,
355                                  const gchar    *pass);
356 static gint imap_cmd_logout     (IMAPSession    *session);
357 static gint imap_cmd_noop       (IMAPSession    *session);
358 #if USE_OPENSSL
359 static gint imap_cmd_starttls   (IMAPSession    *session);
360 #endif
361 static gint imap_cmd_namespace  (IMAPSession    *session,
362                                  gchar         **ns_str);
363 static gint imap_cmd_list       (IMAPSession    *session,
364                                  const gchar    *ref,
365                                  const gchar    *mailbox,
366                                  GPtrArray      *argbuf);
367 static gint imap_cmd_do_select  (IMAPSession    *session,
368                                  const gchar    *folder,
369                                  gboolean        examine,
370                                  gint           *exists,
371                                  gint           *recent,
372                                  gint           *unseen,
373                                  guint32        *uid_validity,
374                                  gboolean        block);
375 static gint imap_cmd_select     (IMAPSession    *session,
376                                  const gchar    *folder,
377                                  gint           *exists,
378                                  gint           *recent,
379                                  gint           *unseen,
380                                  guint32        *uid_validity,
381                                  gboolean        block);
382 static gint imap_cmd_examine    (IMAPSession    *session,
383                                  const gchar    *folder,
384                                  gint           *exists,
385                                  gint           *recent,
386                                  gint           *unseen,
387                                  guint32        *uid_validity,
388                                  gboolean        block);
389 static gint imap_cmd_create     (IMAPSession    *sock,
390                                  const gchar    *folder);
391 static gint imap_cmd_rename     (IMAPSession    *sock,
392                                  const gchar    *oldfolder,
393                                  const gchar    *newfolder);
394 static gint imap_cmd_delete     (IMAPSession    *session,
395                                  const gchar    *folder);
396 static gint imap_cmd_envelope   (IMAPSession    *session,
397                                  IMAPSet         set);
398 static gint imap_cmd_fetch      (IMAPSession    *sock,
399                                  guint32         uid,
400                                  const gchar    *filename,
401                                  gboolean        headers,
402                                  gboolean        body);
403 static gint imap_cmd_append     (IMAPSession    *session,
404                                  const gchar    *destfolder,
405                                  const gchar    *file,
406                                  IMAPFlags       flags,
407                                  guint32        *new_uid);
408 static gint imap_cmd_copy       (IMAPSession    *session, 
409                                  const gchar    *seq_set, 
410                                  const gchar    *destfolder,
411                                  GRelation      *uid_mapping);
412 static gint imap_cmd_store      (IMAPSession    *session,
413                                  IMAPSet         set,
414                                  gchar          *sub_cmd);
415 static gint imap_cmd_expunge    (IMAPSession    *session,
416                                  IMAPSet         seq_set);
417 static gint imap_cmd_close      (IMAPSession    *session);
418
419 static gint imap_cmd_ok         (IMAPSession    *session,
420                                  GPtrArray      *argbuf);
421 static gint imap_cmd_ok_block   (IMAPSession    *session,
422                                  GPtrArray      *argbuf);
423 static gint imap_cmd_ok_with_block
424                                 (IMAPSession    *session, 
425                                  GPtrArray      *argbuf, 
426                                  gboolean       block);
427 static void imap_gen_send       (IMAPSession    *session,
428                                  const gchar    *format, ...);
429 static gint imap_gen_recv       (IMAPSession    *session,
430                                  gchar         **ret);
431 static gint imap_gen_recv_block (IMAPSession    *session,
432                                  gchar         **ret);
433 static gint imap_gen_recv_with_block    
434                                 (IMAPSession    *session,
435                                  gchar         **ret,
436                                  gboolean        block);
437
438 /* misc utility functions */
439 static gchar *strchr_cpy                        (const gchar    *src,
440                                                  gchar           ch,
441                                                  gchar          *dest,
442                                                  gint            len);
443 static gchar *get_quoted                        (const gchar    *src,
444                                                  gchar           ch,
445                                                  gchar          *dest,
446                                                  gint            len);
447 static gchar *search_array_contain_str          (GPtrArray      *array,
448                                                  const gchar    *str);
449 static gchar *search_array_str                  (GPtrArray      *array,
450                                                  const gchar    *str);
451 static void imap_path_separator_subst           (gchar          *str,
452                                                  gchar           separator);
453
454 static gchar *imap_utf8_to_modified_utf7        (const gchar    *from);
455 static gchar *imap_modified_utf7_to_utf8        (const gchar    *mutf7_str);
456
457 static GSList *imap_get_seq_set_from_numlist    (MsgNumberList  *msglist);
458 static GSList *imap_get_seq_set_from_msglist    (MsgInfoList    *msglist);
459 static void imap_seq_set_free                   (GSList         *seq_list);
460
461 static gboolean imap_rename_folder_func         (GNode          *node,
462                                                  gpointer        data);
463 static gint imap_get_num_list                   (Folder         *folder,
464                                                  FolderItem     *item,
465                                                  GSList        **list,
466                                                  gboolean       *old_uids_valid);
467 static GSList *imap_get_msginfos                (Folder         *folder,
468                                                  FolderItem     *item,
469                                                  GSList         *msgnum_list);
470 static MsgInfo *imap_get_msginfo                (Folder         *folder,
471                                                  FolderItem     *item,
472                                                  gint            num);
473 static gboolean imap_scan_required              (Folder         *folder,
474                                                  FolderItem     *item);
475 static void imap_change_flags                   (Folder         *folder,
476                                                  FolderItem     *item,
477                                                  MsgInfo        *msginfo,
478                                                  MsgPermFlags    newflags);
479 static gint imap_get_flags                      (Folder         *folder,
480                                                  FolderItem     *item,
481                                                  MsgInfoList    *msglist,
482                                                  GRelation      *msgflags);
483 static gchar *imap_folder_get_path              (Folder         *folder);
484 static gchar *imap_item_get_path                (Folder         *folder,
485                                                  FolderItem     *item);
486 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
487 static GHashTable *flags_set_table = NULL;
488 static GHashTable *flags_unset_table = NULL;
489 typedef struct _hashtable_data {
490         IMAPSession *session;
491         GSList *msglist;
492 } hashtable_data;
493
494 static FolderClass imap_class;
495
496 typedef struct _thread_data {
497         gchar *server;
498         gushort port;
499         gboolean done;
500         SockInfo *sock;
501 #ifdef USE_OPENSSL
502         SSLType ssl_type;
503 #endif
504 } thread_data;
505
506 #ifdef USE_PTHREAD
507 void *imap_getline_thread(void *data)
508 {
509         thread_data *td = (thread_data *)data;
510         gchar *line = NULL;
511         
512         line = sock_getline(td->sock);
513         
514         td->done = TRUE;
515         
516         return (void *)line;
517 }
518 #endif
519
520 /* imap_getline just wraps sock_getline inside a thread, 
521  * performing gtk updates so that the interface isn't frozen.
522  */
523 static gchar *imap_getline(SockInfo *sock)
524 {
525 #if (defined USE_PTHREAD && defined __GLIBC__ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)))
526         thread_data *td = g_new0(thread_data, 1);
527         pthread_t pt;
528         gchar *line;
529         td->sock = sock;
530         td->done = FALSE;
531         
532         if (pthread_create(&pt, PTHREAD_CREATE_JOINABLE,
533                         imap_getline_thread, td) != 0) {
534                 g_free(td);
535                 return sock_getline(sock);
536         }
537         
538         debug_print("+++waiting for imap_getline_thread...\n");
539         while(!td->done) {
540                 /* don't let the interface freeze while waiting */
541                 sylpheed_do_idle();
542         }
543         debug_print("---imap_getline_thread done\n");
544
545         /* get the thread's return value and clean its resources */
546         pthread_join(pt, (void *)&line);
547         g_free(td);
548
549         return line;
550 #else
551         return sock_getline(sock);
552 #endif
553 }
554
555 FolderClass *imap_get_class(void)
556 {
557         if (imap_class.idstr == NULL) {
558                 imap_class.type = F_IMAP;
559                 imap_class.idstr = "imap";
560                 imap_class.uistr = "IMAP4";
561
562                 /* Folder functions */
563                 imap_class.new_folder = imap_folder_new;
564                 imap_class.destroy_folder = imap_folder_destroy;
565                 imap_class.scan_tree = imap_scan_tree;
566                 imap_class.create_tree = imap_create_tree;
567
568                 /* FolderItem functions */
569                 imap_class.item_new = imap_folder_item_new;
570                 imap_class.item_destroy = imap_folder_item_destroy;
571                 imap_class.item_get_path = imap_item_get_path;
572                 imap_class.create_folder = imap_create_folder;
573                 imap_class.rename_folder = imap_rename_folder;
574                 imap_class.remove_folder = imap_remove_folder;
575                 imap_class.close = imap_close;
576                 imap_class.get_num_list = imap_get_num_list;
577                 imap_class.scan_required = imap_scan_required;
578
579                 /* Message functions */
580                 imap_class.get_msginfo = imap_get_msginfo;
581                 imap_class.get_msginfos = imap_get_msginfos;
582                 imap_class.fetch_msg = imap_fetch_msg;
583                 imap_class.fetch_msg_full = imap_fetch_msg_full;
584                 imap_class.add_msg = imap_add_msg;
585                 imap_class.add_msgs = imap_add_msgs;
586                 imap_class.copy_msg = imap_copy_msg;
587                 imap_class.copy_msgs = imap_copy_msgs;
588                 imap_class.remove_msg = imap_remove_msg;
589                 imap_class.remove_msgs = imap_remove_msgs;
590                 imap_class.remove_all_msg = imap_remove_all_msg;
591                 imap_class.is_msg_changed = imap_is_msg_changed;
592                 imap_class.change_flags = imap_change_flags;
593                 imap_class.get_flags = imap_get_flags;
594                 imap_class.set_batch = imap_set_batch;
595         }
596         
597         return &imap_class;
598 }
599
600 static gchar *get_seq_set_from_seq_list(GSList *seq_list)
601 {
602         gchar *val = NULL;
603         gchar *tmp = NULL;
604         GSList *cur = NULL;
605         
606         for (cur = seq_list; cur != NULL; cur = cur->next) {
607                 tmp = val?g_strdup(val):NULL;
608                 g_free(val);
609                 val = g_strconcat(tmp?tmp:"", tmp?",":"",(gchar *)cur->data,
610                                   NULL);
611                 g_free(tmp);
612         }
613         return val;
614 }
615
616
617 static Folder *imap_folder_new(const gchar *name, const gchar *path)
618 {
619         Folder *folder;
620
621         folder = (Folder *)g_new0(IMAPFolder, 1);
622         folder->klass = &imap_class;
623         imap_folder_init(folder, name, path);
624
625         return folder;
626 }
627
628 static void imap_folder_destroy(Folder *folder)
629 {
630         gchar *dir;
631
632         dir = imap_folder_get_path(folder);
633         if (is_dir_exist(dir))
634                 remove_dir_recursive(dir);
635         g_free(dir);
636
637         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
638 }
639
640 static void imap_folder_init(Folder *folder, const gchar *name,
641                              const gchar *path)
642 {
643         folder_remote_folder_init((Folder *)folder, name, path);
644 }
645
646 static FolderItem *imap_folder_item_new(Folder *folder)
647 {
648         IMAPFolderItem *item;
649         
650         item = g_new0(IMAPFolderItem, 1);
651         item->lastuid = 0;
652         item->uid_next = 0;
653         item->uid_list = NULL;
654
655         return (FolderItem *)item;
656 }
657
658 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
659 {
660         IMAPFolderItem *item = (IMAPFolderItem *)_item;
661
662         g_return_if_fail(item != NULL);
663         g_slist_free(item->uid_list);
664
665         g_free(_item);
666 }
667
668 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
669 {
670         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
671         
672         item->lastuid = 0;
673         item->uid_next = 0;
674         g_slist_free(item->uid_list);
675         item->uid_list = NULL;
676         
677         return FALSE;
678 }
679
680 static void imap_reset_uid_lists(Folder *folder)
681 {
682         if(folder->node == NULL)
683                 return;
684         
685         /* Destroy all uid lists and rest last uid */
686         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL); 
687 }
688
689 /* Send CAPABILITY, and examine the server's response to see whether this
690  * connection is pre-authenticated or not and build a list of CAPABILITIES. */
691 static gint imap_greeting(IMAPSession *session)
692 {
693         gchar *capstr;
694         GPtrArray *argbuf;
695
696         imap_gen_send(session, "CAPABILITY");
697         
698         argbuf = g_ptr_array_new();
699
700         if (imap_cmd_ok(session, argbuf) != IMAP_SUCCESS ||
701             ((capstr = search_array_str(argbuf, "CAPABILITY ")) == NULL)) {
702                 ptr_array_free_strings(argbuf);
703                 g_ptr_array_free(argbuf, TRUE);
704                 return -1;
705         }
706
707         session->authenticated = search_array_str(argbuf, "PREAUTH") != NULL;
708         
709         capstr += strlen("CAPABILITY ");
710
711         IMAP_SESSION(session)->capability = g_strsplit(capstr, " ", 0);
712         
713         ptr_array_free_strings(argbuf);
714         g_ptr_array_free(argbuf, TRUE);
715
716         if (imap_has_capability(session, "UIDPLUS")) 
717                 session->uidplus = TRUE; 
718
719         return 0;
720 }
721
722 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
723                       IMAPAuthType type)
724 {
725         gint ok;
726
727         if (type == 0 || type == IMAP_AUTH_LOGIN)
728                 ok = imap_cmd_login(session, user, pass);
729         else
730                 ok = imap_cmd_authenticate(session, user, pass, type);
731
732         if (ok == IMAP_SUCCESS)
733                 session->authenticated = TRUE;
734
735         return ok;
736 }
737
738 static IMAPSession *imap_session_get(Folder *folder)
739 {
740         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
741         IMAPSession *session = NULL;
742
743         g_return_val_if_fail(folder != NULL, NULL);
744         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
745         g_return_val_if_fail(folder->account != NULL, NULL);
746         
747         if (prefs_common.work_offline && !imap_gtk_should_override()) {
748                 return NULL;
749         }
750
751         /* Make sure we have a session */
752         if (rfolder->session != NULL) {
753                 session = IMAP_SESSION(rfolder->session);
754         } else {
755                 imap_reset_uid_lists(folder);
756                 session = imap_session_new(folder->account);
757         }
758         if(session == NULL)
759                 return NULL;
760
761         if (SESSION(session)->sock->state == CONN_DISCONNECTED) {
762                 debug_print("IMAP server disconnected\n");
763                 session_destroy(SESSION(session));
764                 imap_reset_uid_lists(folder);
765                 session = imap_session_new(folder->account);
766         }
767
768         /* Make sure session is authenticated */
769         if (!IMAP_SESSION(session)->authenticated)
770                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
771         if (!IMAP_SESSION(session)->authenticated) {
772                 session_destroy(SESSION(session));
773                 rfolder->session = NULL;
774                 return NULL;
775         }
776
777         /* Make sure we have parsed the IMAP namespace */
778         imap_parse_namespace(IMAP_SESSION(session),
779                              IMAP_FOLDER(folder));
780
781         /* I think the point of this code is to avoid sending a
782          * keepalive if we've used the session recently and therefore
783          * think it's still alive.  Unfortunately, most of the code
784          * does not yet check for errors on the socket, and so if the
785          * connection drops we don't notice until the timeout expires.
786          * A better solution than sending a NOOP every time would be
787          * for every command to be prepared to retry until it is
788          * successfully sent. -- mbp */
789         if (time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) {
790                 /* verify that the session is still alive */
791                 if (imap_cmd_noop(session) != IMAP_SUCCESS) {
792                         /* Check if this is the first try to establish a
793                            connection, if yes we don't try to reconnect */
794                         if (rfolder->session == NULL) {
795                                 log_warning(_("Connecting to %s failed"),
796                                             folder->account->recv_server);
797                                 session_destroy(SESSION(session));
798                                 session = NULL;
799                         } else {
800                                 log_warning(_("IMAP4 connection to %s has been"
801                                             " disconnected. Reconnecting...\n"),
802                                             folder->account->recv_server);
803                                 statusbar_print_all(_("IMAP4 connection to %s has been"
804                                             " disconnected. Reconnecting...\n"),
805                                             folder->account->recv_server);
806                                 session_destroy(SESSION(session));
807                                 /* Clear folders session to make imap_session_get create
808                                    a new session, because of rfolder->session == NULL
809                                    it will not try to reconnect again and so avoid an
810                                    endless loop */
811                                 rfolder->session = NULL;
812                                 session = imap_session_get(folder);
813                                 statusbar_pop_all();
814                         }
815                 }
816         }
817
818         rfolder->session = SESSION(session);
819         
820         return IMAP_SESSION(session);
821 }
822
823 static IMAPSession *imap_session_new(const PrefsAccount *account)
824 {
825         IMAPSession *session;
826         SockInfo *imap_sock;
827         gushort port;
828
829 #ifdef USE_OPENSSL
830         /* FIXME: IMAP over SSL only... */ 
831         SSLType ssl_type;
832
833         port = account->set_imapport ? account->imapport
834                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
835         ssl_type = account->ssl_imap;   
836 #else
837         port = account->set_imapport ? account->imapport
838                 : IMAP4_PORT;
839 #endif
840
841         if (account->set_tunnelcmd) {
842                 log_message(_("creating tunneled IMAP4 connection\n"));
843 #if USE_OPENSSL
844                 if ((imap_sock = imap_open_tunnel(account->recv_server, 
845                                                   account->tunnelcmd,
846                                                   ssl_type)) == NULL)
847 #else
848                 if ((imap_sock = imap_open_tunnel(account->recv_server, 
849                                                   account->tunnelcmd)) == NULL)
850 #endif
851                         return NULL;
852         } else {
853                 g_return_val_if_fail(account->recv_server != NULL, NULL);
854
855                 log_message(_("creating IMAP4 connection to %s:%d ...\n"),
856                             account->recv_server, port);
857                 
858 #if USE_OPENSSL
859                 if ((imap_sock = imap_open(account->recv_server, port,
860                                            ssl_type)) == NULL)
861 #else
862                 if ((imap_sock = imap_open(account->recv_server, port)) == NULL)
863 #endif
864                         return NULL;
865         }
866
867         session = g_new0(IMAPSession, 1);
868         session_init(SESSION(session));
869         SESSION(session)->type             = SESSION_IMAP;
870         SESSION(session)->server           = g_strdup(account->recv_server);
871         SESSION(session)->sock             = imap_sock;
872
873         SESSION(session)->destroy          = imap_session_destroy;
874
875         session->capability = NULL;
876
877         session->authenticated = FALSE;
878         session->mbox = NULL;
879         session->cmd_count = 0;
880
881         /* Only need to log in if the connection was not PREAUTH */
882         if (imap_greeting(session) != IMAP_SUCCESS) {
883                 session_destroy(SESSION(session));
884                 return NULL;
885         }
886
887 #if USE_OPENSSL
888         if (account->ssl_imap == SSL_STARTTLS && 
889             imap_has_capability(session, "STARTTLS")) {
890                 gint ok;
891
892                 ok = imap_cmd_starttls(session);
893                 if (ok != IMAP_SUCCESS) {
894                         log_warning(_("Can't start TLS session.\n"));
895                         session_destroy(SESSION(session));
896                         return NULL;
897                 }
898                 if (!ssl_init_socket_with_method(SESSION(session)->sock, 
899                     SSL_METHOD_TLSv1)) {
900                         session_destroy(SESSION(session));
901                         return NULL;
902                 }
903
904                 imap_free_capabilities(session);
905                 session->authenticated = FALSE;
906                 session->uidplus = FALSE;
907                 session->cmd_count = 1;
908
909                 if (imap_greeting(session) != IMAP_SUCCESS) {
910                         session_destroy(SESSION(session));
911                         return NULL;
912                 }               
913         }
914 #endif
915         log_message("IMAP connection is %s-authenticated\n",
916                     (session->authenticated) ? "pre" : "un");
917
918         return session;
919 }
920
921 static void imap_session_authenticate(IMAPSession *session, 
922                                       const PrefsAccount *account)
923 {
924         gchar *pass;
925
926         g_return_if_fail(account->userid != NULL);
927
928         pass = account->passwd;
929         if (!pass) {
930                 gchar *tmp_pass;
931                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
932                 if (!tmp_pass)
933                         return;
934                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
935                 g_free(tmp_pass);
936         }
937         statusbar_print_all(_("Connecting to IMAP4 server %s...\n"),
938                                 account->recv_server);
939         if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
940                 imap_cmd_logout(session);
941                 statusbar_pop_all();
942                 
943                 return;
944         }
945         statusbar_pop_all();
946         session->authenticated = TRUE;
947 }
948
949 static void imap_session_destroy(Session *session)
950 {
951         imap_free_capabilities(IMAP_SESSION(session));
952         g_free(IMAP_SESSION(session)->mbox);
953         sock_close(session->sock);
954         session->sock = NULL;
955 }
956
957 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
958 {
959         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
960 }
961
962 static guint get_size_with_lfs(MsgInfo *info) 
963 {
964         FILE *fp = NULL;
965         guint cnt = 0;
966         gchar buf[4096];
967         
968         if (info == NULL)
969                 return -1;
970         
971         fp = procmsg_open_message(info);
972         if (!fp)
973                 return -1;
974         
975         while (fgets(buf, sizeof (buf), fp) != NULL) {
976                 cnt += strlen(buf);
977                 if (!strstr(buf, "\r") && strstr(buf, "\n"))
978                         cnt++;
979         }
980         
981         fclose(fp);
982         return cnt;
983 }
984
985 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
986                                   gboolean headers, gboolean body)
987 {
988         gchar *path, *filename;
989         IMAPSession *session;
990         gint ok;
991
992         g_return_val_if_fail(folder != NULL, NULL);
993         g_return_val_if_fail(item != NULL, NULL);
994
995         if (uid == 0)
996                 return NULL;
997
998         path = folder_item_get_path(item);
999         if (!is_dir_exist(path))
1000                 make_dir_hier(path);
1001         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
1002         g_free(path);
1003
1004         if (is_file_exist(filename)) {
1005                 /* see whether the local file represents the whole message
1006                  * or not. As the IMAP server reports size with \r chars,
1007                  * we have to update the local file (UNIX \n only) size */
1008                 MsgInfo *msginfo = imap_parse_msg(filename, item);
1009                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1010                 guint have_size = get_size_with_lfs(msginfo);
1011                 debug_print("message %d has been already %scached (%d/%d).\n", uid,
1012                                 have_size == cached->size ? "fully ":"",
1013                                 have_size, cached? (int)cached->size : -1);
1014                                 
1015                 if (cached && (cached->size == have_size || !body)) {
1016                         procmsg_msginfo_free(cached);
1017                         procmsg_msginfo_free(msginfo);
1018                         return filename;
1019                 } else {
1020                         procmsg_msginfo_free(cached);
1021                         procmsg_msginfo_free(msginfo);
1022                 }
1023         }
1024
1025         session = imap_session_get(folder);
1026         if (!session) {
1027                 g_free(filename);
1028                 return NULL;
1029         }
1030
1031         debug_print("IMAP fetching messages\n");
1032         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1033                          NULL, NULL, NULL, NULL, FALSE);
1034         if (ok != IMAP_SUCCESS) {
1035                 g_warning("can't select mailbox %s\n", item->path);
1036                 g_free(filename);
1037                 return NULL;
1038         }
1039
1040         debug_print("getting message %d...\n", uid);
1041         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1042
1043         if (ok != IMAP_SUCCESS) {
1044                 g_warning("can't fetch message %d\n", uid);
1045                 g_free(filename);
1046                 return NULL;
1047         }
1048
1049         return filename;
1050 }
1051
1052 static gint imap_add_msg(Folder *folder, FolderItem *dest, 
1053                          const gchar *file, MsgFlags *flags)
1054 {
1055         gint ret;
1056         GSList file_list;
1057         MsgFileInfo fileinfo;
1058
1059         g_return_val_if_fail(file != NULL, -1);
1060
1061         fileinfo.msginfo = NULL;
1062         fileinfo.file = (gchar *)file;
1063         fileinfo.flags = flags;
1064         file_list.data = &fileinfo;
1065         file_list.next = NULL;
1066
1067         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1068         return ret;
1069 }
1070
1071 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1072                    GRelation *relation)
1073 {
1074         gchar *destdir;
1075         IMAPSession *session;
1076         guint32 last_uid = 0;
1077         GSList *cur;
1078         MsgFileInfo *fileinfo;
1079         gint ok;
1080
1081         g_return_val_if_fail(folder != NULL, -1);
1082         g_return_val_if_fail(dest != NULL, -1);
1083         g_return_val_if_fail(file_list != NULL, -1);
1084
1085         session = imap_session_get(folder);
1086         if (!session) return -1;
1087
1088         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
1089
1090         for (cur = file_list; cur != NULL; cur = cur->next) {
1091                 IMAPFlags iflags = 0;
1092                 guint32 new_uid = 0;
1093
1094                 fileinfo = (MsgFileInfo *)cur->data;
1095
1096                 if (fileinfo->flags) {
1097                         if (MSG_IS_MARKED(*fileinfo->flags))
1098                                 iflags |= IMAP_FLAG_FLAGGED;
1099                         if (MSG_IS_REPLIED(*fileinfo->flags))
1100                                 iflags |= IMAP_FLAG_ANSWERED;
1101                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1102                                 iflags |= IMAP_FLAG_SEEN;
1103                 }
1104
1105                 if (dest->stype == F_OUTBOX ||
1106                     dest->stype == F_QUEUE  ||
1107                     dest->stype == F_DRAFT  ||
1108                     dest->stype == F_TRASH)
1109                         iflags |= IMAP_FLAG_SEEN;
1110
1111                 ok = imap_cmd_append(session, destdir, fileinfo->file, iflags, 
1112                                      &new_uid);
1113
1114                 if (ok != IMAP_SUCCESS) {
1115                         g_warning("can't append message %s\n", fileinfo->file);
1116                         g_free(destdir);
1117                         return -1;
1118                 }
1119
1120                 if (relation != NULL)
1121                         g_relation_insert(relation, fileinfo->msginfo != NULL ? 
1122                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1123                                           GINT_TO_POINTER(dest->last_num + 1));
1124                 if (last_uid < new_uid)
1125                         last_uid = new_uid;
1126         }
1127
1128         g_free(destdir);
1129
1130         return last_uid;
1131 }
1132
1133 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest, 
1134                               MsgInfoList *msglist, GRelation *relation)
1135 {
1136         FolderItem *src;
1137         gchar *destdir;
1138         GSList *seq_list, *cur;
1139         MsgInfo *msginfo;
1140         IMAPSession *session;
1141         gint ok = IMAP_SUCCESS;
1142         GRelation *uid_mapping;
1143         gint last_num = 0;
1144         
1145         g_return_val_if_fail(folder != NULL, -1);
1146         g_return_val_if_fail(dest != NULL, -1);
1147         g_return_val_if_fail(msglist != NULL, -1);
1148
1149         session = imap_session_get(folder);
1150         if (!session) {
1151                 return -1;
1152         }
1153         msginfo = (MsgInfo *)msglist->data;
1154
1155         src = msginfo->folder;
1156         if (src == dest) {
1157                 g_warning("the src folder is identical to the dest.\n");
1158                 return -1;
1159         }
1160
1161         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1162                          NULL, NULL, NULL, NULL, FALSE);
1163         if (ok != IMAP_SUCCESS) {
1164                 return ok;
1165         }
1166
1167         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
1168         seq_list = imap_get_seq_set_from_msglist(msglist);
1169         uid_mapping = g_relation_new(2);
1170         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1171         
1172         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1173                 gchar *seq_set = (gchar *)cur->data;
1174
1175                 debug_print("Copying message %s%c[%s] to %s ...\n",
1176                             src->path, G_DIR_SEPARATOR,
1177                             seq_set, destdir);
1178
1179                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping);
1180                 if (ok != IMAP_SUCCESS) {
1181                         g_relation_destroy(uid_mapping);
1182                         imap_seq_set_free(seq_list);
1183                         return -1;
1184                 }
1185         }
1186
1187         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1188                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1189                 GTuples *tuples;
1190
1191                 tuples = g_relation_select(uid_mapping, 
1192                                            GINT_TO_POINTER(msginfo->msgnum),
1193                                            0);
1194                 if (tuples->len > 0) {
1195                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
1196                         g_relation_insert(relation, msginfo,
1197                                           GPOINTER_TO_INT(num));
1198                         if (num > last_num)
1199                                 last_num = num;
1200                 } else
1201                         g_relation_insert(relation, msginfo,
1202                                           GPOINTER_TO_INT(0));
1203                 g_tuples_destroy(tuples);
1204         }
1205
1206         g_relation_destroy(uid_mapping);
1207         imap_seq_set_free(seq_list);
1208
1209         g_free(destdir);
1210         
1211         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
1212         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
1213         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
1214         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
1215
1216         if (ok == IMAP_SUCCESS)
1217                 return last_num;
1218         else
1219                 return -1;
1220 }
1221
1222 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1223 {
1224         GSList msglist;
1225
1226         g_return_val_if_fail(msginfo != NULL, -1);
1227
1228         msglist.data = msginfo;
1229         msglist.next = NULL;
1230
1231         return imap_copy_msgs(folder, dest, &msglist, NULL);
1232 }
1233
1234 static gint imap_copy_msgs(Folder *folder, FolderItem *dest, 
1235                     MsgInfoList *msglist, GRelation *relation)
1236 {
1237         MsgInfo *msginfo;
1238         GSList *file_list;
1239         gint ret;
1240
1241         g_return_val_if_fail(folder != NULL, -1);
1242         g_return_val_if_fail(dest != NULL, -1);
1243         g_return_val_if_fail(msglist != NULL, -1);
1244
1245         msginfo = (MsgInfo *)msglist->data;
1246         g_return_val_if_fail(msginfo->folder != NULL, -1);
1247
1248         if (folder == msginfo->folder->folder)
1249                 return imap_do_copy_msgs(folder, dest, msglist, relation);
1250
1251         file_list = procmsg_get_message_file_list(msglist);
1252         g_return_val_if_fail(file_list != NULL, -1);
1253
1254         ret = imap_add_msgs(folder, dest, file_list, relation);
1255
1256         procmsg_message_file_list_free(file_list);
1257
1258         return ret;
1259 }
1260
1261
1262 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest, 
1263                                 MsgInfoList *msglist, GRelation *relation)
1264 {
1265         gchar *destdir;
1266         GSList *seq_list = NULL, *cur;
1267         MsgInfo *msginfo;
1268         IMAPSession *session;
1269         gint ok = IMAP_SUCCESS;
1270         GRelation *uid_mapping;
1271         
1272         g_return_val_if_fail(folder != NULL, -1);
1273         g_return_val_if_fail(dest != NULL, -1);
1274         g_return_val_if_fail(msglist != NULL, -1);
1275
1276         session = imap_session_get(folder);
1277         if (!session) {
1278                 return -1;
1279         }
1280         msginfo = (MsgInfo *)msglist->data;
1281
1282         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
1283                          NULL, NULL, NULL, NULL, FALSE);
1284         if (ok != IMAP_SUCCESS) {
1285                 return ok;
1286         }
1287
1288         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
1289         for (cur = msglist; cur; cur = cur->next) {
1290                 msginfo = (MsgInfo *)cur->data;
1291                 seq_list = g_slist_append(seq_list, GINT_TO_POINTER(msginfo->msgnum));
1292         }
1293
1294         uid_mapping = g_relation_new(2);
1295         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
1296
1297         ok = imap_set_message_flags
1298                 (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
1299                 seq_list, IMAP_FLAG_DELETED, TRUE);
1300         if (ok != IMAP_SUCCESS) {
1301                 log_warning(_("can't set deleted flags\n"));
1302                 return ok;
1303         }
1304         ok = imap_cmd_expunge(session, NULL);
1305         if (ok != IMAP_SUCCESS) {
1306                 log_warning(_("can't expunge\n"));
1307                 return ok;
1308         }
1309         
1310         g_relation_destroy(uid_mapping);
1311         g_slist_free(seq_list);
1312
1313         g_free(destdir);
1314
1315         if (ok == IMAP_SUCCESS)
1316                 return 0;
1317         else
1318                 return -1;
1319 }
1320
1321 static gint imap_remove_msgs(Folder *folder, FolderItem *dest, 
1322                     MsgInfoList *msglist, GRelation *relation)
1323 {
1324         MsgInfo *msginfo;
1325
1326         g_return_val_if_fail(folder != NULL, -1);
1327         g_return_val_if_fail(dest != NULL, -1);
1328         g_return_val_if_fail(msglist != NULL, -1);
1329
1330         msginfo = (MsgInfo *)msglist->data;
1331         g_return_val_if_fail(msginfo->folder != NULL, -1);
1332
1333         return imap_do_remove_msgs(folder, dest, msglist, relation);
1334 }
1335
1336 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1337 {
1338         GSList *list = folder_item_get_msg_list(item);
1339         gint res = imap_remove_msgs(folder, item, list, NULL);
1340         g_slist_free(list);
1341         return res;
1342 }
1343
1344 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
1345                                     MsgInfo *msginfo)
1346 {
1347         /* TODO: properly implement this method */
1348         return FALSE;
1349 }
1350
1351 static gint imap_close(Folder *folder, FolderItem *item)
1352 {
1353         gint ok;
1354         IMAPSession *session;
1355
1356         g_return_val_if_fail(folder != NULL, -1);
1357         g_return_val_if_fail(item != NULL, -1);
1358         g_return_val_if_fail(item->path != NULL, -1);
1359
1360         session = imap_session_get(folder);
1361         if (!session) return -1;
1362
1363         if (session->mbox) {
1364                 if (strcmp2(session->mbox, item->path) != 0) return -1;
1365
1366                 ok = imap_cmd_close(session);
1367                 if (ok != IMAP_SUCCESS)
1368                         log_warning(_("can't close folder\n"));
1369
1370                 g_free(session->mbox);
1371
1372                 session->mbox = NULL;
1373
1374                 return ok;
1375         }
1376
1377         return 0;
1378 }
1379
1380 static gint imap_scan_tree(Folder *folder)
1381 {
1382         FolderItem *item = NULL;
1383         IMAPSession *session;
1384         gchar *root_folder = NULL;
1385
1386         g_return_val_if_fail(folder != NULL, -1);
1387         g_return_val_if_fail(folder->account != NULL, -1);
1388
1389         session = imap_session_get(folder);
1390         if (!session) {
1391                 if (!folder->node) {
1392                         folder_tree_destroy(folder);
1393                         item = folder_item_new(folder, folder->name, NULL);
1394                         item->folder = folder;
1395                         folder->node = item->node = g_node_new(item);
1396                 }
1397                 return -1;
1398         }
1399
1400         if (folder->account->imap_dir && *folder->account->imap_dir) {
1401                 gchar *real_path;
1402                 GPtrArray *argbuf;
1403                 gint ok;
1404
1405                 Xstrdup_a(root_folder, folder->account->imap_dir, return -1);
1406                 extract_quote(root_folder, '"');
1407                 subst_char(root_folder,
1408                            imap_get_path_separator(IMAP_FOLDER(folder),
1409                                                    root_folder),
1410                            '/');
1411                 strtailchomp(root_folder, '/');
1412                 real_path = imap_get_real_path
1413                         (IMAP_FOLDER(folder), root_folder);
1414                 debug_print("IMAP root directory: %s\n", real_path);
1415
1416                 /* check if root directory exist */
1417                 argbuf = g_ptr_array_new();
1418                 ok = imap_cmd_list(session, NULL, real_path, argbuf);
1419                 if (ok != IMAP_SUCCESS ||
1420                     search_array_str(argbuf, "LIST ") == NULL) {
1421                         log_warning(_("root folder %s does not exist\n"), real_path);
1422                         g_ptr_array_free(argbuf, TRUE);
1423                         g_free(real_path);
1424
1425                         if (!folder->node) {
1426                                 item = folder_item_new(folder, folder->name, NULL);
1427                                 item->folder = folder;
1428                                 folder->node = item->node = g_node_new(item);
1429                         }
1430                         return -1;
1431                 }
1432                 g_ptr_array_free(argbuf, TRUE);
1433                 g_free(real_path);
1434         }
1435
1436         if (folder->node)
1437                 item = FOLDER_ITEM(folder->node->data);
1438         if (!item || ((item->path || root_folder) &&
1439                       strcmp2(item->path, root_folder) != 0)) {
1440                 folder_tree_destroy(folder);
1441                 item = folder_item_new(folder, folder->name, root_folder);
1442                 item->folder = folder;
1443                 folder->node = item->node = g_node_new(item);
1444         }
1445
1446         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data));
1447         imap_create_missing_folders(folder);
1448
1449         return 0;
1450 }
1451
1452 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
1453 {
1454         Folder *folder;
1455         IMAPFolder *imapfolder;
1456         FolderItem *new_item;
1457         GSList *item_list, *cur;
1458         GNode *node;
1459         gchar *real_path;
1460         gchar *wildcard_path;
1461         gchar separator;
1462         gchar wildcard[3];
1463
1464         g_return_val_if_fail(item != NULL, -1);
1465         g_return_val_if_fail(item->folder != NULL, -1);
1466         g_return_val_if_fail(item->no_sub == FALSE, -1);
1467
1468         folder = item->folder;
1469         imapfolder = IMAP_FOLDER(folder);
1470
1471         separator = imap_get_path_separator(imapfolder, item->path);
1472
1473         if (folder->ui_func)
1474                 folder->ui_func(folder, item, folder->ui_func_data);
1475
1476         if (item->path) {
1477                 wildcard[0] = separator;
1478                 wildcard[1] = '%';
1479                 wildcard[2] = '\0';
1480                 real_path = imap_get_real_path(imapfolder, item->path);
1481         } else {
1482                 wildcard[0] = '%';
1483                 wildcard[1] = '\0';
1484                 real_path = g_strdup("");
1485         }
1486
1487         Xstrcat_a(wildcard_path, real_path, wildcard,
1488                   {g_free(real_path); return IMAP_ERROR;});
1489         QUOTE_IF_REQUIRED(wildcard_path, wildcard_path);
1490
1491         imap_gen_send(session, "LIST \"\" %s",
1492                       wildcard_path);
1493
1494         strtailchomp(real_path, separator);
1495         item_list = imap_parse_list(imapfolder, session, real_path, NULL);
1496         g_free(real_path);
1497
1498         node = item->node->children;
1499         while (node != NULL) {
1500                 FolderItem *old_item = FOLDER_ITEM(node->data);
1501                 GNode *next = node->next;
1502
1503                 new_item = NULL;
1504                 for (cur = item_list; cur != NULL; cur = cur->next) {
1505                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
1506                         if (!strcmp2(old_item->path, cur_item->path)) {
1507                                 new_item = cur_item;
1508                                 break;
1509                         }
1510                 }
1511                 if (!new_item) {
1512                         debug_print("folder '%s' not found. removing...\n",
1513                                     old_item->path);
1514                         folder_item_remove(old_item);
1515                 } else {
1516                         old_item->no_sub = new_item->no_sub;
1517                         old_item->no_select = new_item->no_select;
1518                         if (old_item->no_sub == TRUE && node->children) {
1519                                 debug_print("folder '%s' doesn't have "
1520                                             "subfolders. removing...\n",
1521                                             old_item->path);
1522                                 folder_item_remove_children(old_item);
1523                         }
1524                 }
1525
1526                 node = next;
1527         }
1528
1529         for (cur = item_list; cur != NULL; cur = cur->next) {
1530                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
1531                 new_item = NULL;
1532                 for (node = item->node->children; node != NULL;
1533                      node = node->next) {
1534                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
1535                                      cur_item->path)) {
1536                                 new_item = FOLDER_ITEM(node->data);
1537                                 folder_item_destroy(cur_item);
1538                                 cur_item = NULL;
1539                                 break;
1540                         }
1541                 }
1542                 if (!new_item) {
1543                         new_item = cur_item;
1544                         debug_print("new folder '%s' found.\n", new_item->path);
1545                         folder_item_append(item, new_item);
1546                 }
1547
1548                 if (!strcmp(new_item->path, "INBOX")) {
1549                         new_item->stype = F_INBOX;
1550                         folder->inbox = new_item;
1551                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
1552                         gchar *base;
1553
1554                         base = g_path_get_basename(new_item->path);
1555
1556                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
1557                                 new_item->stype = F_OUTBOX;
1558                                 folder->outbox = new_item;
1559                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
1560                                 new_item->stype = F_DRAFT;
1561                                 folder->draft = new_item;
1562                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
1563                                 new_item->stype = F_QUEUE;
1564                                 folder->queue = new_item;
1565                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
1566                                 new_item->stype = F_TRASH;
1567                                 folder->trash = new_item;
1568                         }
1569                         g_free(base);
1570                 }
1571
1572                 if (new_item->no_sub == FALSE)
1573                         imap_scan_tree_recursive(session, new_item);
1574         }
1575
1576         g_slist_free(item_list);
1577
1578         return IMAP_SUCCESS;
1579 }
1580
1581 static GSList *imap_parse_list(IMAPFolder *folder, IMAPSession *session,
1582                                const gchar *real_path, gchar *separator)
1583 {
1584         gchar buf[IMAPBUFSIZE];
1585         gchar flags[256];
1586         gchar separator_str[16];
1587         gchar *p;
1588         gchar *base;
1589         gchar *loc_name, *loc_path;
1590         GSList *item_list = NULL;
1591         GString *str;
1592         FolderItem *new_item;
1593
1594         debug_print("getting list of %s ...\n",
1595                     *real_path ? real_path : "\"\"");
1596
1597         str = g_string_new(NULL);
1598
1599         for (;;) {
1600                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) <= 0) {
1601                         log_warning(_("error occurred while getting LIST.\n"));
1602                         break;
1603                 }
1604                 strretchomp(buf);
1605                 if (buf[0] != '*' || buf[1] != ' ') {
1606                         log_print("IMAP4< %s\n", buf);
1607                         if (sscanf(buf, "%*d %16s", buf) < 1 ||
1608                             strcmp(buf, "OK") != 0)
1609                                 log_warning(_("error occurred while getting LIST.\n"));
1610                                 
1611                         break;
1612                 }
1613                 debug_print("IMAP4< %s\n", buf);
1614
1615                 g_string_assign(str, buf);
1616                 p = str->str + 2;
1617                 if (strncmp(p, "LIST ", 5) != 0) continue;
1618                 p += 5;
1619
1620                 if (*p != '(') continue;
1621                 p++;
1622                 p = strchr_cpy(p, ')', flags, sizeof(flags));
1623                 if (!p) continue;
1624                 while (*p == ' ') p++;
1625
1626                 p = strchr_cpy(p, ' ', separator_str, sizeof(separator_str));
1627                 if (!p) continue;
1628                 extract_quote(separator_str, '"');
1629                 if (!strcmp(separator_str, "NIL"))
1630                         separator_str[0] = '\0';
1631                 if (separator)
1632                         *separator = separator_str[0];
1633
1634                 buf[0] = '\0';
1635                 while (*p == ' ') p++;
1636                 if (*p == '{' || *p == '"')
1637                         p = imap_parse_atom(SESSION(session)->sock, p,
1638                                             buf, sizeof(buf), str);
1639                 else
1640                         strncpy2(buf, p, sizeof(buf));
1641                 strtailchomp(buf, separator_str[0]);
1642                 if (buf[0] == '\0') continue;
1643                 if (!strcmp(buf, real_path)) continue;
1644
1645                 if (separator_str[0] != '\0')
1646                         subst_char(buf, separator_str[0], '/');
1647                 base = g_path_get_basename(buf);
1648                 if (base[0] == '.') continue;
1649
1650                 loc_name = imap_modified_utf7_to_utf8(base);
1651                 loc_path = imap_modified_utf7_to_utf8(buf);
1652                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
1653                 if (strcasestr(flags, "\\Noinferiors") != NULL)
1654                         new_item->no_sub = TRUE;
1655                 if (strcmp(buf, "INBOX") != 0 &&
1656                     strcasestr(flags, "\\Noselect") != NULL)
1657                         new_item->no_select = TRUE;
1658
1659                 item_list = g_slist_append(item_list, new_item);
1660
1661                 debug_print("folder '%s' found.\n", loc_path);
1662                 g_free(base);
1663                 g_free(loc_path);
1664                 g_free(loc_name);
1665         }
1666
1667         g_string_free(str, TRUE);
1668
1669         return item_list;
1670 }
1671
1672 static gint imap_create_tree(Folder *folder)
1673 {
1674         g_return_val_if_fail(folder != NULL, -1);
1675         g_return_val_if_fail(folder->node != NULL, -1);
1676         g_return_val_if_fail(folder->node->data != NULL, -1);
1677         g_return_val_if_fail(folder->account != NULL, -1);
1678
1679         imap_scan_tree(folder);
1680         imap_create_missing_folders(folder);
1681
1682         return 0;
1683 }
1684
1685 static void imap_create_missing_folders(Folder *folder)
1686 {
1687         g_return_if_fail(folder != NULL);
1688
1689         if (!folder->inbox)
1690                 folder->inbox = imap_create_special_folder
1691                         (folder, F_INBOX, "INBOX");
1692 #if 0
1693         if (!folder->outbox)
1694                 folder->outbox = imap_create_special_folder
1695                         (folder, F_OUTBOX, "Sent");
1696         if (!folder->draft)
1697                 folder->draft = imap_create_special_folder
1698                         (folder, F_DRAFT, "Drafts");
1699         if (!folder->queue)
1700                 folder->queue = imap_create_special_folder
1701                         (folder, F_QUEUE, "Queue");
1702 #endif
1703         if (!folder->trash)
1704                 folder->trash = imap_create_special_folder
1705                         (folder, F_TRASH, "Trash");
1706 }
1707
1708 static FolderItem *imap_create_special_folder(Folder *folder,
1709                                               SpecialFolderItemType stype,
1710                                               const gchar *name)
1711 {
1712         FolderItem *item;
1713         FolderItem *new_item;
1714
1715         g_return_val_if_fail(folder != NULL, NULL);
1716         g_return_val_if_fail(folder->node != NULL, NULL);
1717         g_return_val_if_fail(folder->node->data != NULL, NULL);
1718         g_return_val_if_fail(folder->account != NULL, NULL);
1719         g_return_val_if_fail(name != NULL, NULL);
1720
1721         item = FOLDER_ITEM(folder->node->data);
1722         new_item = imap_create_folder(folder, item, name);
1723
1724         if (!new_item) {
1725                 g_warning("Can't create '%s'\n", name);
1726                 if (!folder->inbox) return NULL;
1727
1728                 new_item = imap_create_folder(folder, folder->inbox, name);
1729                 if (!new_item)
1730                         g_warning("Can't create '%s' under INBOX\n", name);
1731                 else
1732                         new_item->stype = stype;
1733         } else
1734                 new_item->stype = stype;
1735
1736         return new_item;
1737 }
1738
1739 static gchar *imap_folder_get_path(Folder *folder)
1740 {
1741         gchar *folder_path;
1742
1743         g_return_val_if_fail(folder != NULL, NULL);
1744         g_return_val_if_fail(folder->account != NULL, NULL);
1745
1746         folder_path = g_strconcat(get_imap_cache_dir(),
1747                                   G_DIR_SEPARATOR_S,
1748                                   folder->account->recv_server,
1749                                   G_DIR_SEPARATOR_S,
1750                                   folder->account->userid,
1751                                   NULL);
1752
1753         return folder_path;
1754 }
1755
1756 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
1757 {
1758         gchar *folder_path, *path;
1759
1760         g_return_val_if_fail(folder != NULL, NULL);
1761         g_return_val_if_fail(item != NULL, NULL);
1762         folder_path = imap_folder_get_path(folder);
1763
1764         g_return_val_if_fail(folder_path != NULL, NULL);
1765         if (folder_path[0] == G_DIR_SEPARATOR) {
1766                 if (item->path)
1767                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
1768                                            item->path, NULL);
1769                 else
1770                         path = g_strdup(folder_path);
1771         } else {
1772                 if (item->path)
1773                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1774                                            folder_path, G_DIR_SEPARATOR_S,
1775                                            item->path, NULL);
1776                 else
1777                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1778                                            folder_path, NULL);
1779         }
1780         g_free(folder_path);
1781
1782         return path;
1783 }
1784
1785 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
1786                                const gchar *name)
1787 {
1788         gchar *dirpath, *imap_path;
1789         IMAPSession *session;
1790         FolderItem *new_item;
1791         gchar separator;
1792         gchar *new_name;
1793         const gchar *p;
1794         gint ok;
1795
1796         g_return_val_if_fail(folder != NULL, NULL);
1797         g_return_val_if_fail(folder->account != NULL, NULL);
1798         g_return_val_if_fail(parent != NULL, NULL);
1799         g_return_val_if_fail(name != NULL, NULL);
1800
1801         session = imap_session_get(folder);
1802         if (!session) return NULL;
1803
1804         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0)
1805                 dirpath = g_strdup(name);
1806         else if (parent->path)
1807                 dirpath = g_strconcat(parent->path, "/", name, NULL);
1808         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
1809                 dirpath = g_strdup(name);
1810         else if (folder->account->imap_dir && *folder->account->imap_dir) {
1811                 gchar *imap_dir;
1812
1813                 Xstrdup_a(imap_dir, folder->account->imap_dir, return NULL);
1814                 strtailchomp(imap_dir, '/');
1815                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
1816         } else
1817                 dirpath = g_strdup(name);
1818
1819         /* keep trailing directory separator to create a folder that contains
1820            sub folder */
1821         imap_path = imap_utf8_to_modified_utf7(dirpath);
1822         strtailchomp(dirpath, '/');
1823         Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
1824         strtailchomp(new_name, '/');
1825         separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
1826         imap_path_separator_subst(imap_path, separator);
1827         subst_char(new_name, '/', separator);
1828
1829         if (strcmp(name, "INBOX") != 0) {
1830                 GPtrArray *argbuf;
1831                 gint i;
1832                 gboolean exist = FALSE;
1833
1834                 argbuf = g_ptr_array_new();
1835                 ok = imap_cmd_list(session, NULL, imap_path,
1836                                    argbuf);
1837                 if (ok != IMAP_SUCCESS) {
1838                         log_warning(_("can't create mailbox: LIST failed\n"));
1839                         g_free(imap_path);
1840                         g_free(dirpath);
1841                         ptr_array_free_strings(argbuf);
1842                         g_ptr_array_free(argbuf, TRUE);
1843                         return NULL;
1844                 }
1845
1846                 for (i = 0; i < argbuf->len; i++) {
1847                         gchar *str;
1848                         str = g_ptr_array_index(argbuf, i);
1849                         if (!strncmp(str, "LIST ", 5)) {
1850                                 exist = TRUE;
1851                                 break;
1852                         }
1853                 }
1854                 ptr_array_free_strings(argbuf);
1855                 g_ptr_array_free(argbuf, TRUE);
1856
1857                 if (!exist) {
1858                         ok = imap_cmd_create(session, imap_path);
1859                         if (ok != IMAP_SUCCESS) {
1860                                 log_warning(_("can't create mailbox\n"));
1861                                 g_free(imap_path);
1862                                 g_free(dirpath);
1863                                 return NULL;
1864                         }
1865                 }
1866         }
1867
1868         new_item = folder_item_new(folder, new_name, dirpath);
1869         folder_item_append(parent, new_item);
1870         g_free(imap_path);
1871         g_free(dirpath);
1872
1873         dirpath = folder_item_get_path(new_item);
1874         if (!is_dir_exist(dirpath))
1875                 make_dir_hier(dirpath);
1876         g_free(dirpath);
1877
1878         return new_item;
1879 }
1880
1881 static gint imap_rename_folder(Folder *folder, FolderItem *item,
1882                                const gchar *name)
1883 {
1884         gchar *dirpath;
1885         gchar *newpath;
1886         gchar *real_oldpath;
1887         gchar *real_newpath;
1888         gchar *paths[2];
1889         gchar *old_cache_dir;
1890         gchar *new_cache_dir;
1891         IMAPSession *session;
1892         gchar separator;
1893         gint ok;
1894         gint exists, recent, unseen;
1895         guint32 uid_validity;
1896
1897         g_return_val_if_fail(folder != NULL, -1);
1898         g_return_val_if_fail(item != NULL, -1);
1899         g_return_val_if_fail(item->path != NULL, -1);
1900         g_return_val_if_fail(name != NULL, -1);
1901
1902         if (strchr(name, imap_get_path_separator(IMAP_FOLDER(folder), item->path)) != NULL) {
1903                 g_warning(_("New folder name must not contain the namespace "
1904                             "path separator"));
1905                 return -1;
1906         }
1907
1908         session = imap_session_get(folder);
1909         if (!session) return -1;
1910
1911         real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1912
1913         g_free(session->mbox);
1914         session->mbox = NULL;
1915         ok = imap_cmd_examine(session, "INBOX",
1916                               &exists, &recent, &unseen, &uid_validity, FALSE);
1917         if (ok != IMAP_SUCCESS) {
1918                 g_free(real_oldpath);
1919                 return -1;
1920         }
1921
1922         separator = imap_get_path_separator(IMAP_FOLDER(folder), item->path);
1923         if (strchr(item->path, G_DIR_SEPARATOR)) {
1924                 dirpath = g_path_get_dirname(item->path);
1925                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
1926                 g_free(dirpath);
1927         } else
1928                 newpath = g_strdup(name);
1929
1930         real_newpath = imap_utf8_to_modified_utf7(newpath);
1931         imap_path_separator_subst(real_newpath, separator);
1932
1933         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
1934         if (ok != IMAP_SUCCESS) {
1935                 log_warning(_("can't rename mailbox: %s to %s\n"),
1936                             real_oldpath, real_newpath);
1937                 g_free(real_oldpath);
1938                 g_free(newpath);
1939                 g_free(real_newpath);
1940                 return -1;
1941         }
1942
1943         g_free(item->name);
1944         item->name = g_strdup(name);
1945
1946         old_cache_dir = folder_item_get_path(item);
1947
1948         paths[0] = g_strdup(item->path);
1949         paths[1] = newpath;
1950         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1951                         imap_rename_folder_func, paths);
1952
1953         if (is_dir_exist(old_cache_dir)) {
1954                 new_cache_dir = folder_item_get_path(item);
1955                 if (rename(old_cache_dir, new_cache_dir) < 0) {
1956                         FILE_OP_ERROR(old_cache_dir, "rename");
1957                 }
1958                 g_free(new_cache_dir);
1959         }
1960
1961         g_free(old_cache_dir);
1962         g_free(paths[0]);
1963         g_free(newpath);
1964         g_free(real_oldpath);
1965         g_free(real_newpath);
1966
1967         return 0;
1968 }
1969
1970 static gint imap_remove_folder(Folder *folder, FolderItem *item)
1971 {
1972         gint ok;
1973         IMAPSession *session;
1974         gchar *path;
1975         gchar *cache_dir;
1976         gint exists, recent, unseen;
1977         guint32 uid_validity;
1978
1979         g_return_val_if_fail(folder != NULL, -1);
1980         g_return_val_if_fail(item != NULL, -1);
1981         g_return_val_if_fail(item->path != NULL, -1);
1982
1983         session = imap_session_get(folder);
1984         if (!session) return -1;
1985
1986         path = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1987
1988         ok = imap_cmd_examine(session, "INBOX",
1989                               &exists, &recent, &unseen, &uid_validity, FALSE);
1990         if (ok != IMAP_SUCCESS) {
1991                 g_free(path);
1992                 return -1;
1993         }
1994
1995         ok = imap_cmd_delete(session, path);
1996         if (ok != IMAP_SUCCESS) {
1997                 log_warning(_("can't delete mailbox\n"));
1998                 g_free(path);
1999                 return -1;
2000         }
2001
2002         g_free(path);
2003         cache_dir = folder_item_get_path(item);
2004         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
2005                 g_warning("can't remove directory '%s'\n", cache_dir);
2006         g_free(cache_dir);
2007         folder_item_remove(item);
2008
2009         return 0;
2010 }
2011
2012 typedef struct _uncached_data {
2013         IMAPSession *session;
2014         FolderItem *item;
2015         MsgNumberList *numlist;
2016         gboolean done;
2017 } uncached_data;
2018
2019 static void *imap_get_uncached_messages_thread(void *data)
2020 {
2021         uncached_data *stuff = (uncached_data *)data;
2022         IMAPSession *session = stuff->session;
2023         FolderItem *item = stuff->item;
2024         MsgNumberList *numlist = stuff->numlist;
2025
2026         gchar *tmp;
2027         GSList *newlist = NULL;
2028         GSList *llast = NULL;
2029         GString *str = NULL;
2030         MsgInfo *msginfo;
2031         GSList *seq_list, *cur;
2032         IMAPSet imapset;
2033
2034         if (session == NULL || item == NULL || item->folder == NULL
2035             || FOLDER_CLASS(item->folder) != &imap_class) {
2036                 stuff->done = TRUE;
2037                 return NULL;
2038         }
2039
2040         seq_list = imap_get_seq_set_from_numlist(numlist);
2041         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2042                 imapset = cur->data;
2043
2044                 if (imap_cmd_envelope(session, imapset)
2045                     != IMAP_SUCCESS) {
2046                         log_warning(_("can't get envelope\n"));
2047                         continue;
2048                 }
2049
2050                 str = g_string_new(NULL);
2051
2052                 for (;;) {
2053                         if ((tmp =sock_getline(SESSION(session)->sock)) == NULL) {
2054                                 log_warning(_("error occurred while getting envelope.\n"));
2055                                 g_string_free(str, TRUE);
2056                                 str = NULL;
2057                                 break;
2058                         }
2059                         strretchomp(tmp);
2060                         if (tmp[0] != '*' || tmp[1] != ' ') {
2061                                 log_print("IMAP4< %s\n", tmp);
2062                                 g_free(tmp);
2063                                 break;
2064                         }
2065                         if (strstr(tmp, "FETCH") == NULL) {
2066                                 log_print("IMAP4< %s\n", tmp);
2067                                 g_free(tmp);
2068                                 continue;
2069                         }
2070                         log_print("IMAP4< %s\n", tmp);
2071                         g_string_assign(str, tmp);
2072                         g_free(tmp);
2073
2074                         msginfo = imap_parse_envelope
2075                                 (SESSION(session)->sock, item, str);
2076                         if (!msginfo) {
2077                                 log_warning(_("can't parse envelope: %s\n"), str->str);
2078                                 continue;
2079                         }
2080                         if (item->stype == F_QUEUE) {
2081                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_QUEUED);
2082                         } else if (item->stype == F_DRAFT) {
2083                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_DRAFT);
2084                         }
2085
2086                         msginfo->folder = item;
2087
2088                         if (!newlist)
2089                                 llast = newlist = g_slist_append(newlist, msginfo);
2090                         else {
2091                                 llast = g_slist_append(llast, msginfo);
2092                                 llast = llast->next;
2093                         }
2094                 }
2095                 if (str)
2096                         g_string_free(str, TRUE);
2097         }
2098         imap_seq_set_free(seq_list);
2099         
2100         session_set_access_time(SESSION(session));
2101         stuff->done = TRUE;
2102
2103         return newlist;
2104 }
2105
2106 static GSList *imap_get_uncached_messages(IMAPSession *session,
2107                                         FolderItem *item,
2108                                         MsgNumberList *numlist)
2109 {
2110         uncached_data *data = g_new0(uncached_data, 1);
2111         GSList *result = NULL;
2112 #ifdef USE_PTHREAD
2113         pthread_t pt;
2114 #endif
2115         data->done = FALSE;
2116         data->session = session;
2117         data->item = item;
2118         data->numlist = numlist;
2119
2120         if (prefs_common.work_offline && !imap_gtk_should_override()) {
2121                 g_free(data);
2122                 return NULL;
2123         }
2124
2125 #if (defined USE_PTHREAD && defined __GLIBC__ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)))
2126         if (pthread_create(&pt, PTHREAD_CREATE_JOINABLE,
2127                         imap_get_uncached_messages_thread, data) != 0) {
2128                 result = (GSList *)imap_get_uncached_messages_thread(data);
2129                 g_free(data);
2130                 return result;
2131         }
2132         debug_print("+++waiting for imap_get_uncached_messages_thread...\n");
2133         while(!data->done) {
2134                 /* don't let the interface freeze while waiting */
2135                 sylpheed_do_idle();
2136         }
2137         debug_print("---imap_get_uncached_messages_thread done\n");
2138
2139         /* get the thread's return value and clean its resources */
2140         pthread_join(pt, (void *)&result);
2141 #else
2142         result = (GSList *)imap_get_uncached_messages_thread(data);
2143 #endif
2144         g_free(data);
2145         return result;
2146 }
2147
2148 static void imap_delete_all_cached_messages(FolderItem *item)
2149 {
2150         gchar *dir;
2151
2152         g_return_if_fail(item != NULL);
2153         g_return_if_fail(item->folder != NULL);
2154         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
2155
2156         debug_print("Deleting all cached messages...\n");
2157
2158         dir = folder_item_get_path(item);
2159         if (is_dir_exist(dir))
2160                 remove_all_numbered_files(dir);
2161         g_free(dir);
2162
2163         debug_print("done.\n");
2164 }
2165
2166 #if USE_OPENSSL
2167 static SockInfo *imap_open_tunnel(const gchar *server,
2168                            const gchar *tunnelcmd,
2169                            SSLType ssl_type)
2170 #else
2171 static SockInfo *imap_open_tunnel(const gchar *server,
2172                            const gchar *tunnelcmd)
2173 #endif
2174 {
2175         SockInfo *sock;
2176
2177         if ((sock = sock_connect_cmd(server, tunnelcmd)) == NULL) {
2178                 log_warning(_("Can't establish IMAP4 session with: %s\n"),
2179                             server);
2180                 return NULL;
2181         }
2182 #if USE_OPENSSL
2183         return imap_init_sock(sock, ssl_type);
2184 #else
2185         return imap_init_sock(sock);
2186 #endif
2187 }
2188
2189 void *imap_open_thread(void *data)
2190 {
2191         SockInfo *sock = NULL;
2192         thread_data *td = (thread_data *)data;
2193         if ((sock = sock_connect(td->server, td->port)) == NULL) {
2194                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
2195                             td->server, td->port);
2196                 td->done = TRUE;
2197                 return NULL;
2198         }
2199
2200         td->done = TRUE;
2201         return sock;
2202 }
2203
2204 #if USE_OPENSSL
2205 static SockInfo *imap_open(const gchar *server, gushort port,
2206                            SSLType ssl_type)
2207 #else
2208 static SockInfo *imap_open(const gchar *server, gushort port)
2209 #endif
2210 {
2211         thread_data *td = g_new0(thread_data, 1);
2212 #if USE_PTHREAD
2213         pthread_t pt;
2214 #endif
2215         SockInfo *sock = NULL;
2216
2217 #if USE_OPENSSL
2218         td->ssl_type = ssl_type;
2219 #endif
2220         td->server = g_strdup(server);
2221         td->port = port;
2222         td->done = FALSE;
2223
2224         statusbar_print_all(_("Connecting to IMAP4 server: %s..."), server);
2225
2226 #if (defined USE_PTHREAD && defined __GLIBC__ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)))
2227         if (pthread_create(&pt, PTHREAD_CREATE_JOINABLE,
2228                         imap_open_thread, td) != 0) {
2229                 statusbar_pop_all();
2230                 sock = imap_open_thread(td);
2231         } else {        
2232                 debug_print("+++waiting for imap_open_thread...\n");
2233                 while(!td->done) {
2234                         /* don't let the interface freeze while waiting */
2235                         sylpheed_do_idle();
2236                 }
2237
2238                 /* get the thread's return value and clean its resources */
2239                 pthread_join(pt, (void *)&sock);
2240         }
2241 #else
2242         sock = imap_open_thread(td);
2243 #endif
2244 #if USE_OPENSSL
2245         if (sock && td->ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
2246                 log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
2247                             td->server, td->port);
2248                 sock_close(sock);
2249                 sock = NULL;
2250                 td->done = TRUE;
2251         }
2252 #endif
2253         g_free(td->server);
2254         g_free(td);
2255
2256         debug_print("---imap_open_thread returned %p\n", sock);
2257         statusbar_pop_all();
2258
2259         if(!sock && !prefs_common.no_recv_err_panel) {
2260                 alertpanel_error(_("Can't connect to IMAP4 server: %s:%d"),
2261                                  server, port);
2262         }
2263
2264         return sock;
2265 }
2266
2267 #if USE_OPENSSL
2268 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type)
2269 #else
2270 static SockInfo *imap_init_sock(SockInfo *sock)
2271 #endif
2272 {
2273
2274         return sock;
2275 }
2276
2277 static GList *imap_parse_namespace_str(gchar *str)
2278 {
2279         guchar *p = str;
2280         gchar *name;
2281         gchar *separator;
2282         IMAPNameSpace *namespace;
2283         GList *ns_list = NULL;
2284
2285         while (*p != '\0') {
2286                 /* parse ("#foo" "/") */
2287
2288                 while (*p && *p != '(') p++;
2289                 if (*p == '\0') break;
2290                 p++;
2291
2292                 while (*p && *p != '"') p++;
2293                 if (*p == '\0') break;
2294                 p++;
2295                 name = p;
2296
2297                 while (*p && *p != '"') p++;
2298                 if (*p == '\0') break;
2299                 *p = '\0';
2300                 p++;
2301
2302                 while (*p && isspace(*p)) p++;
2303                 if (*p == '\0') break;
2304                 if (strncmp(p, "NIL", 3) == 0)
2305                         separator = NULL;
2306                 else if (*p == '"') {
2307                         p++;
2308                         separator = p;
2309                         while (*p && *p != '"') p++;
2310                         if (*p == '\0') break;
2311                         *p = '\0';
2312                         p++;
2313                 } else break;
2314
2315                 while (*p && *p != ')') p++;
2316                 if (*p == '\0') break;
2317                 p++;
2318
2319                 namespace = g_new(IMAPNameSpace, 1);
2320                 namespace->name = g_strdup(name);
2321                 namespace->separator = separator ? separator[0] : '\0';
2322                 ns_list = g_list_append(ns_list, namespace);
2323         }
2324
2325         return ns_list;
2326 }
2327
2328 static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
2329 {
2330         gchar *ns_str;
2331         gchar **str_array;
2332
2333         g_return_if_fail(session != NULL);
2334         g_return_if_fail(folder != NULL);
2335
2336         if (folder->ns_personal != NULL ||
2337             folder->ns_others   != NULL ||
2338             folder->ns_shared   != NULL)
2339                 return;
2340
2341         if (!imap_has_capability(session, "NAMESPACE")) {
2342                 imap_get_namespace_by_list(session, folder);
2343                 return;
2344         }
2345         
2346         if (imap_cmd_namespace(session, &ns_str)
2347             != IMAP_SUCCESS) {
2348                 log_warning(_("can't get namespace\n"));
2349                 return;
2350         }
2351
2352         str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
2353         if (str_array == NULL) {
2354                 g_free(ns_str);
2355                 imap_get_namespace_by_list(session, folder);
2356                 return;
2357         }
2358         if (str_array[0])
2359                 folder->ns_personal = imap_parse_namespace_str(str_array[0]);
2360         if (str_array[0] && str_array[1])
2361                 folder->ns_others = imap_parse_namespace_str(str_array[1]);
2362         if (str_array[0] && str_array[1] && str_array[2])
2363                 folder->ns_shared = imap_parse_namespace_str(str_array[2]);
2364         g_strfreev(str_array);
2365         g_free(ns_str);
2366 }
2367
2368 static void imap_get_namespace_by_list(IMAPSession *session, IMAPFolder *folder)
2369 {
2370         GSList *item_list, *cur;
2371         gchar separator = '\0';
2372         IMAPNameSpace *namespace;
2373
2374         g_return_if_fail(session != NULL);
2375         g_return_if_fail(folder != NULL);
2376
2377         if (folder->ns_personal != NULL ||
2378             folder->ns_others   != NULL ||
2379             folder->ns_shared   != NULL)
2380                 return;
2381
2382         imap_gen_send(session, "LIST \"\" \"\"");
2383         item_list = imap_parse_list(folder, session, "", &separator);
2384         for (cur = item_list; cur != NULL; cur = cur->next)
2385                 folder_item_destroy(FOLDER_ITEM(cur->data));
2386         g_slist_free(item_list);
2387
2388         namespace = g_new(IMAPNameSpace, 1);
2389         namespace->name = g_strdup("");
2390         namespace->separator = separator;
2391         folder->ns_personal = g_list_append(NULL, namespace);
2392 }
2393
2394 static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
2395                                                     const gchar *path)
2396 {
2397         IMAPNameSpace *namespace = NULL;
2398         gchar *tmp_path, *name;
2399
2400         if (!path) path = "";
2401
2402         for (; ns_list != NULL; ns_list = ns_list->next) {
2403                 IMAPNameSpace *tmp_ns = ns_list->data;
2404
2405                 Xstrcat_a(tmp_path, path, "/", return namespace);
2406                 Xstrdup_a(name, tmp_ns->name, return namespace);
2407                 if (tmp_ns->separator && tmp_ns->separator != '/') {
2408                         subst_char(tmp_path, tmp_ns->separator, '/');
2409                         subst_char(name, tmp_ns->separator, '/');
2410                 }
2411                 if (strncmp(tmp_path, name, strlen(name)) == 0)
2412                         namespace = tmp_ns;
2413         }
2414
2415         return namespace;
2416 }
2417
2418 static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
2419                                           const gchar *path)
2420 {
2421         IMAPNameSpace *namespace;
2422
2423         g_return_val_if_fail(folder != NULL, NULL);
2424
2425         namespace = imap_find_namespace_from_list(folder->ns_personal, path);
2426         if (namespace) return namespace;
2427         namespace = imap_find_namespace_from_list(folder->ns_others, path);
2428         if (namespace) return namespace;
2429         namespace = imap_find_namespace_from_list(folder->ns_shared, path);
2430         if (namespace) return namespace;
2431
2432         return NULL;
2433 }
2434
2435 static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
2436 {
2437         IMAPNameSpace *namespace;
2438         gchar separator = '/';
2439
2440         namespace = imap_find_namespace(folder, path);
2441         if (namespace && namespace->separator)
2442                 separator = namespace->separator;
2443
2444         return separator;
2445 }
2446
2447 static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
2448 {
2449         gchar *real_path;
2450         gchar separator;
2451
2452         g_return_val_if_fail(folder != NULL, NULL);
2453         g_return_val_if_fail(path != NULL, NULL);
2454
2455         real_path = imap_utf8_to_modified_utf7(path);
2456         separator = imap_get_path_separator(folder, path);
2457         imap_path_separator_subst(real_path, separator);
2458
2459         return real_path;
2460 }
2461
2462 static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
2463                               gchar *dest, gint dest_len, GString *str)
2464 {
2465         gchar *cur_pos = src;
2466         gchar *nextline;
2467
2468         g_return_val_if_fail(str != NULL, cur_pos);
2469
2470         /* read the next line if the current response buffer is empty */
2471         while (isspace(*(guchar *)cur_pos)) cur_pos++;
2472         while (*cur_pos == '\0') {
2473                 if ((nextline = imap_getline(sock)) == NULL)
2474                         return cur_pos;
2475                 g_string_assign(str, nextline);
2476                 cur_pos = str->str;
2477                 strretchomp(nextline);
2478                 /* log_print("IMAP4< %s\n", nextline); */
2479                 debug_print("IMAP4< %s\n", nextline);
2480                 g_free(nextline);
2481
2482                 while (isspace(*(guchar *)cur_pos)) cur_pos++;
2483         }
2484
2485         if (!strncmp(cur_pos, "NIL", 3)) {
2486                 *dest = '\0';
2487                 cur_pos += 3;
2488         } else if (*cur_pos == '\"') {
2489                 gchar *p;
2490
2491                 p = get_quoted(cur_pos, '\"', dest, dest_len);
2492                 cur_pos = p ? p : cur_pos + 2;
2493         } else if (*cur_pos == '{') {
2494                 gchar buf[32];
2495                 gint len;
2496                 gint line_len = 0;
2497
2498                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2499                 len = atoi(buf);
2500                 g_return_val_if_fail(len >= 0, cur_pos);
2501
2502                 g_string_truncate(str, 0);
2503                 cur_pos = str->str;
2504
2505                 do {
2506                         if ((nextline = imap_getline(sock)) == NULL)
2507                                 return cur_pos;
2508                         line_len += strlen(nextline);
2509                         g_string_append(str, nextline);
2510                         cur_pos = str->str;
2511                         strretchomp(nextline);
2512                         /* log_print("IMAP4< %s\n", nextline); */
2513                         debug_print("IMAP4< %s\n", nextline);
2514                         g_free(nextline);
2515                 } while (line_len < len);
2516
2517                 memcpy(dest, cur_pos, MIN(len, dest_len - 1));
2518                 dest[MIN(len, dest_len - 1)] = '\0';
2519                 cur_pos += len;
2520         }
2521
2522         return cur_pos;
2523 }
2524
2525 static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
2526                               GString *str)
2527 {
2528         gchar *nextline;
2529         gchar buf[32];
2530         gint len;
2531         gint block_len = 0;
2532
2533         *headers = NULL;
2534
2535         g_return_val_if_fail(str != NULL, cur_pos);
2536
2537         while (isspace(*(guchar *)cur_pos)) cur_pos++;
2538
2539         g_return_val_if_fail(*cur_pos == '{', cur_pos);
2540
2541         cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2542         len = atoi(buf);
2543         g_return_val_if_fail(len >= 0, cur_pos);
2544
2545         g_string_truncate(str, 0);
2546         cur_pos = str->str;
2547
2548         do {
2549                 if ((nextline = sock_getline(sock)) == NULL) {
2550                         *headers = NULL;
2551                         return cur_pos;
2552                 }
2553                 block_len += strlen(nextline);
2554                 g_string_append(str, nextline);
2555                 cur_pos = str->str;
2556                 strretchomp(nextline);
2557                 /* debug_print("IMAP4< %s\n", nextline); */
2558                 g_free(nextline);
2559         } while (block_len < len);
2560
2561         debug_print("IMAP4< [contents of BODY.PEEK[HEADER_FIELDS (...)]\n");
2562
2563         *headers = g_strndup(cur_pos, len);
2564         cur_pos += len;
2565
2566         while (isspace(*(guchar *)cur_pos)) cur_pos++;
2567         while (*cur_pos == '\0') {
2568                 if ((nextline = sock_getline(sock)) == NULL)
2569                         return cur_pos;
2570                 g_string_assign(str, nextline);
2571                 cur_pos = str->str;
2572                 strretchomp(nextline);
2573                 debug_print("IMAP4< %s\n", nextline);
2574                 g_free(nextline);
2575
2576                 while (isspace(*(guchar *)cur_pos)) cur_pos++;
2577         }
2578
2579         return cur_pos;
2580 }
2581
2582 static MsgFlags imap_parse_flags(const gchar *flag_str)  
2583 {
2584         const gchar *p = flag_str;
2585         MsgFlags flags = {0, 0};
2586
2587         flags.perm_flags = MSG_UNREAD;
2588
2589         while ((p = strchr(p, '\\')) != NULL) {
2590                 p++;
2591
2592                 if (g_ascii_strncasecmp(p, "Recent", 6) == 0 && MSG_IS_UNREAD(flags)) {
2593                         MSG_SET_PERM_FLAGS(flags, MSG_NEW);
2594                 } else if (g_ascii_strncasecmp(p, "Seen", 4) == 0) {
2595                         MSG_UNSET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
2596                 } else if (g_ascii_strncasecmp(p, "Deleted", 7) == 0) {
2597                         MSG_SET_PERM_FLAGS(flags, MSG_DELETED);
2598                 } else if (g_ascii_strncasecmp(p, "Flagged", 7) == 0) {
2599                         MSG_SET_PERM_FLAGS(flags, MSG_MARKED);
2600                 } else if (g_ascii_strncasecmp(p, "Answered", 8) == 0) {
2601                         MSG_SET_PERM_FLAGS(flags, MSG_REPLIED);
2602                 }
2603         }
2604
2605         return flags;
2606 }
2607
2608 static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
2609                                     GString *line_str)
2610 {
2611         gchar buf[IMAPBUFSIZE];
2612         MsgInfo *msginfo = NULL;
2613         gchar *cur_pos;
2614         gint msgnum;
2615         guint32 uid = 0;
2616         size_t size = 0;
2617         MsgFlags flags = {0, 0}, imap_flags = {0, 0};
2618
2619         g_return_val_if_fail(line_str != NULL, NULL);
2620         g_return_val_if_fail(line_str->str[0] == '*' &&
2621                              line_str->str[1] == ' ', NULL);
2622
2623         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
2624         if (item->stype == F_QUEUE) {
2625                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
2626         } else if (item->stype == F_DRAFT) {
2627                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
2628         }
2629
2630         cur_pos = line_str->str + 2;
2631
2632 #define PARSE_ONE_ELEMENT(ch)                                   \
2633 {                                                               \
2634         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf));    \
2635         if (cur_pos == NULL) {                                  \
2636                 g_warning("cur_pos == NULL\n");                 \
2637                 procmsg_msginfo_free(msginfo);                  \
2638                 return NULL;                                    \
2639         }                                                       \
2640 }
2641
2642         PARSE_ONE_ELEMENT(' ');
2643         msgnum = atoi(buf);
2644
2645         PARSE_ONE_ELEMENT(' ');
2646         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
2647
2648         g_return_val_if_fail(*cur_pos == '(', NULL);
2649         cur_pos++;
2650
2651         while (*cur_pos != '\0' && *cur_pos != ')') {
2652                 while (*cur_pos == ' ') cur_pos++;
2653
2654                 if (!strncmp(cur_pos, "UID ", 4)) {
2655                         cur_pos += 4;
2656                         uid = strtoul(cur_pos, &cur_pos, 10);
2657                 } else if (!strncmp(cur_pos, "FLAGS ", 6)) {
2658                         cur_pos += 6;
2659                         if (*cur_pos != '(') {
2660                                 g_warning("*cur_pos != '('\n");
2661                                 procmsg_msginfo_free(msginfo);
2662                                 return NULL;
2663                         }
2664                         cur_pos++;
2665                         PARSE_ONE_ELEMENT(')');
2666                         imap_flags = imap_parse_flags(buf);
2667                 } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
2668                         cur_pos += 12;
2669                         size = strtol(cur_pos, &cur_pos, 10);
2670                 } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
2671                         gchar *headers;
2672
2673                         cur_pos += 19;
2674                         if (*cur_pos != '(') {
2675                                 g_warning("*cur_pos != '('\n");
2676                                 procmsg_msginfo_free(msginfo);
2677                                 return NULL;
2678                         }
2679                         cur_pos++;
2680                         PARSE_ONE_ELEMENT(')');
2681                         if (*cur_pos != ']') {
2682                                 g_warning("*cur_pos != ']'\n");
2683                                 procmsg_msginfo_free(msginfo);
2684                                 return NULL;
2685                         }
2686                         cur_pos++;
2687                         cur_pos = imap_get_header(sock, cur_pos, &headers,
2688                                                   line_str);
2689                         msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
2690                         g_free(headers);
2691                 } else {
2692                         g_warning("invalid FETCH response: %s\n", cur_pos);
2693                         break;
2694                 }
2695         }
2696
2697         if (msginfo) {
2698                 msginfo->msgnum = uid;
2699                 msginfo->size = size;
2700                 msginfo->flags.tmp_flags |= imap_flags.tmp_flags;
2701                 msginfo->flags.perm_flags = imap_flags.perm_flags;
2702         }
2703
2704         return msginfo;
2705 }
2706
2707 static gchar *imap_get_flag_str(IMAPFlags flags)
2708 {
2709         GString *str;
2710         gchar *ret;
2711
2712         str = g_string_new(NULL);
2713
2714         if (IMAP_IS_SEEN(flags))        g_string_append(str, "\\Seen ");
2715         if (IMAP_IS_ANSWERED(flags))    g_string_append(str, "\\Answered ");
2716         if (IMAP_IS_FLAGGED(flags))     g_string_append(str, "\\Flagged ");
2717         if (IMAP_IS_DELETED(flags))     g_string_append(str, "\\Deleted ");
2718         if (IMAP_IS_DRAFT(flags))       g_string_append(str, "\\Draft");
2719
2720         if (str->len > 0 && str->str[str->len - 1] == ' ')
2721                 g_string_truncate(str, str->len - 1);
2722
2723         ret = str->str;
2724         g_string_free(str, FALSE);
2725
2726         return ret;
2727 }
2728
2729 static gint imap_set_message_flags(IMAPSession *session,
2730                                    MsgNumberList *numlist,
2731                                    IMAPFlags flags,
2732                                    gboolean is_set)
2733 {
2734         gchar *cmd;
2735         gchar *flag_str;
2736         gint ok = 0;
2737         GSList *seq_list;
2738         IMAPSet imapset;
2739
2740         flag_str = imap_get_flag_str(flags);
2741         cmd = g_strconcat(is_set ? "+FLAGS.SILENT (" : "-FLAGS.SILENT (",
2742                           flag_str, ")", NULL);
2743         g_free(flag_str);
2744
2745         seq_list = imap_get_seq_set_from_numlist(numlist);
2746         imapset = get_seq_set_from_seq_list(seq_list);
2747
2748         ok = imap_cmd_store(session, imapset, cmd);
2749         
2750         g_free(imapset);
2751         imap_seq_set_free(seq_list);
2752         g_free(cmd);
2753
2754         return ok;
2755 }
2756
2757 typedef struct _select_data {
2758         IMAPSession *session;
2759         gchar *real_path;
2760         gint *exists;
2761         gint *recent;
2762         gint *unseen;
2763         guint32 *uid_validity;
2764         gboolean done;
2765 } select_data;
2766
2767 static void *imap_select_thread(void *data)
2768 {
2769         select_data *stuff = (select_data *)data;
2770         IMAPSession *session = stuff->session;
2771         gchar *real_path = stuff->real_path;
2772         gint *exists = stuff->exists;
2773         gint *recent = stuff->recent;
2774         gint *unseen = stuff->unseen;
2775         guint32 *uid_validity = stuff->uid_validity;
2776         gint ok;
2777         
2778         ok = imap_cmd_select(session, real_path,
2779                              exists, recent, unseen, uid_validity, TRUE);
2780         stuff->done = TRUE;
2781         return GINT_TO_POINTER(ok);
2782 }
2783                 
2784 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2785                         const gchar *path,
2786                         gint *exists, gint *recent, gint *unseen,
2787                         guint32 *uid_validity, gboolean block)
2788 {
2789         gchar *real_path;
2790         gint ok;
2791         gint exists_, recent_, unseen_;
2792         guint32 uid_validity_;
2793         
2794         if (!exists || !recent || !unseen || !uid_validity) {
2795                 if (session->mbox && strcmp(session->mbox, path) == 0)
2796                         return IMAP_SUCCESS;
2797                 exists = &exists_;
2798                 recent = &recent_;
2799                 unseen = &unseen_;
2800                 uid_validity = &uid_validity_;
2801         }
2802
2803         g_free(session->mbox);
2804         session->mbox = NULL;
2805
2806         real_path = imap_get_real_path(folder, path);
2807         
2808 #if (defined USE_PTHREAD && defined __GLIBC__ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)))
2809         if (block == FALSE) {
2810                 select_data *data = g_new0(select_data, 1);
2811                 void *tmp;
2812                 pthread_t pt;
2813                 data->session = session;
2814                 data->real_path = real_path;
2815                 data->exists = exists;
2816                 data->recent = recent;
2817                 data->unseen = unseen;
2818                 data->uid_validity = uid_validity;
2819                 data->done = FALSE;
2820                 
2821                 if (pthread_create(&pt, PTHREAD_CREATE_JOINABLE,
2822                                 imap_select_thread, data) != 0) {
2823                         ok = GPOINTER_TO_INT(imap_select_thread(data));
2824                         g_free(data);
2825                 } else {
2826                         debug_print("+++waiting for imap_select_thread...\n");
2827                         while(!data->done) {
2828                                 /* don't let the interface freeze while waiting */
2829                                 sylpheed_do_idle();
2830                         }
2831                         debug_print("---imap_select_thread done\n");
2832
2833                         /* get the thread's return value and clean its resources */
2834                         pthread_join(pt, &tmp);
2835                         ok = GPOINTER_TO_INT(tmp);
2836                         g_free(data);
2837                 }
2838         } else {
2839                 ok = imap_cmd_select(session, real_path,
2840                              exists, recent, unseen, uid_validity, block);
2841         }
2842 #else
2843         ok = imap_cmd_select(session, real_path,
2844                              exists, recent, unseen, uid_validity, block);
2845 #endif
2846         if (ok != IMAP_SUCCESS)
2847                 log_warning(_("can't select folder: %s\n"), real_path);
2848         else {
2849                 session->mbox = g_strdup(path);
2850                 session->folder_content_changed = FALSE;
2851         }
2852         g_free(real_path);
2853
2854         return ok;
2855 }
2856
2857 #define THROW(err) { ok = err; goto catch; }
2858
2859 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2860                         const gchar *path,
2861                         gint *messages, gint *recent,
2862                         guint32 *uid_next, guint32 *uid_validity,
2863                         gint *unseen, gboolean block)
2864 {
2865         gchar *real_path;
2866         gchar *real_path_;
2867         gint ok;
2868         GPtrArray *argbuf = NULL;
2869         gchar *str;
2870
2871         if (messages && recent && uid_next && uid_validity && unseen) {
2872                 *messages = *recent = *uid_next = *uid_validity = *unseen = 0;
2873                 argbuf = g_ptr_array_new();
2874         }
2875
2876         real_path = imap_get_real_path(folder, path);
2877         QUOTE_IF_REQUIRED(real_path_, real_path);
2878         imap_gen_send(session, "STATUS %s "
2879                           "(MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)",
2880                           real_path_);
2881
2882         ok = imap_cmd_ok_with_block(session, argbuf, block);
2883         if (ok != IMAP_SUCCESS || !argbuf) THROW(ok);
2884
2885         str = search_array_str(argbuf, "STATUS");
2886         if (!str) THROW(IMAP_ERROR);
2887
2888         str = strchr(str, '(');
2889         if (!str) THROW(IMAP_ERROR);
2890         str++;
2891         while (*str != '\0' && *str != ')') {
2892                 while (*str == ' ') str++;
2893
2894                 if (!strncmp(str, "MESSAGES ", 9)) {
2895                         str += 9;
2896                         *messages = strtol(str, &str, 10);
2897                 } else if (!strncmp(str, "RECENT ", 7)) {
2898                         str += 7;
2899                         *recent = strtol(str, &str, 10);
2900                 } else if (!strncmp(str, "UIDNEXT ", 8)) {
2901                         str += 8;
2902                         *uid_next = strtoul(str, &str, 10);
2903                 } else if (!strncmp(str, "UIDVALIDITY ", 12)) {
2904                         str += 12;
2905                         *uid_validity = strtoul(str, &str, 10);
2906                 } else if (!strncmp(str, "UNSEEN ", 7)) {
2907                         str += 7;
2908                         *unseen = strtol(str, &str, 10);
2909                 } else {
2910                         g_warning("invalid STATUS response: %s\n", str);
2911                         break;
2912                 }
2913         }
2914
2915 catch:
2916         g_free(real_path);
2917         if (argbuf) {
2918                 ptr_array_free_strings(argbuf);
2919                 g_ptr_array_free(argbuf, TRUE);
2920         }
2921
2922         return ok;
2923 }
2924
2925 #undef THROW
2926
2927 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
2928 {
2929         gchar **p;
2930         
2931         for (p = session->capability; *p != NULL; ++p) {
2932                 if (!g_ascii_strcasecmp(*p, cap))
2933                         return TRUE;
2934         }
2935
2936         return FALSE;
2937 }
2938
2939 static void imap_free_capabilities(IMAPSession *session)
2940 {
2941         g_strfreev(session->capability);
2942         session->capability = NULL;
2943 }
2944
2945 /* low-level IMAP4rev1 commands */
2946
2947 static gint imap_cmd_authenticate(IMAPSession *session, const gchar *user,
2948                                   const gchar *pass, IMAPAuthType type)
2949 {
2950         gchar *auth_type;
2951         gint ok;
2952         gchar *buf = NULL;
2953         gchar *challenge;
2954         gint challenge_len;
2955         gchar hexdigest[33];
2956         gchar *response;
2957         gchar *response64;
2958
2959         auth_type = "CRAM-MD5";
2960
2961         imap_gen_send(session, "AUTHENTICATE %s", auth_type);
2962         ok = imap_gen_recv(session, &buf);
2963         if (ok != IMAP_SUCCESS || buf[0] != '+' || buf[1] != ' ') {
2964                 g_free(buf);
2965                 return IMAP_ERROR;
2966         }
2967
2968         challenge = g_malloc(strlen(buf + 2) + 1);
2969         challenge_len = base64_decode(challenge, buf + 2, -1);
2970         challenge[challenge_len] = '\0';
2971         g_free(buf);
2972         log_print("IMAP< [Decoded: %s]\n", challenge);
2973
2974         md5_hex_hmac(hexdigest, challenge, challenge_len, pass, strlen(pass));
2975         g_free(challenge);
2976
2977         response = g_strdup_printf("%s %s", user, hexdigest);
2978         log_print("IMAP> [Encoded: %s]\n", response);
2979         response64 = g_malloc((strlen(response) + 3) * 2 + 1);
2980         base64_encode(response64, response, strlen(response));
2981         g_free(response);
2982
2983         log_print("IMAP> %s\n", response64);
2984         sock_puts(SESSION(session)->sock, response64);
2985         ok = imap_cmd_ok(session, NULL);
2986         if (ok != IMAP_SUCCESS)
2987                 log_warning(_("IMAP4 authentication failed.\n"));
2988
2989         return ok;
2990 }
2991
2992 static gint imap_cmd_login(IMAPSession *session,
2993                            const gchar *user, const gchar *pass)
2994 {
2995         gchar *ans;
2996         gint ok;
2997
2998         imap_gen_send(session, "LOGIN {%d}\r\n%s {%d}\r\n%s", 
2999                                 strlen(user), user, 
3000                                 strlen(pass), pass);
3001                                 
3002         ok = imap_gen_recv_with_block(session, &ans, TRUE);
3003         if (ok != IMAP_SUCCESS || ans[0] != '+' || ans[1] != ' ') {
3004                 g_free(ans);
3005                 return IMAP_ERROR;
3006         }
3007         g_free(ans);
3008         ok = imap_gen_recv_with_block(session, &ans, TRUE);
3009         if (ok != IMAP_SUCCESS || ans[0] != '+' || ans[1] != ' ') {
3010                 g_free(ans);
3011                 return IMAP_ERROR;
3012         }
3013         g_free(ans);
3014         ok = imap_cmd_ok(session, NULL);
3015         if (ok != IMAP_SUCCESS)
3016                 log_warning(_("IMAP4 login failed.\n"));
3017
3018         return ok;
3019 }
3020
3021 static gint imap_cmd_logout(IMAPSession *session)
3022 {
3023         imap_gen_send(session, "LOGOUT");
3024         return imap_cmd_ok(session, NULL);
3025 }
3026
3027 static gint imap_cmd_noop(IMAPSession *session)
3028 {
3029         imap_gen_send(session, "NOOP");
3030         return imap_cmd_ok(session, NULL);
3031 }
3032
3033 #if USE_OPENSSL
3034 static gint imap_cmd_starttls(IMAPSession *session)
3035 {
3036         imap_gen_send(session, "STARTTLS");
3037         return imap_cmd_ok(session, NULL);
3038 }
3039 #endif
3040
3041 #define THROW(err) { ok = err; goto catch; }
3042
3043 static gint imap_cmd_namespace(IMAPSession *session, gchar **ns_str)
3044 {
3045         gint ok;
3046         GPtrArray *argbuf;
3047         gchar *str;
3048
3049         argbuf = g_ptr_array_new();
3050
3051         imap_gen_send(session, "NAMESPACE");
3052         if ((ok = imap_cmd_ok(session, argbuf)) != IMAP_SUCCESS) THROW(ok);
3053
3054         str = search_array_str(argbuf, "NAMESPACE");
3055         if (!str) THROW(IMAP_ERROR);
3056
3057         *ns_str = g_strdup(str);
3058
3059 catch:
3060         ptr_array_free_strings(argbuf);
3061         g_ptr_array_free(argbuf, TRUE);
3062
3063         return ok;
3064 }
3065
3066 #undef THROW
3067
3068 static gint imap_cmd_list(IMAPSession *session, const gchar *ref,
3069                           const gchar *mailbox, GPtrArray *argbuf)
3070 {
3071         gchar *ref_, *mailbox_;
3072
3073         if (!ref) ref = "\"\"";
3074         if (!mailbox) mailbox = "\"\"";
3075
3076         QUOTE_IF_REQUIRED(ref_, ref);
3077         QUOTE_IF_REQUIRED(mailbox_, mailbox);
3078         imap_gen_send(session, "LIST %s %s", ref_, mailbox_);
3079
3080         return imap_cmd_ok(session, argbuf);
3081 }
3082
3083 #define THROW goto catch
3084
3085 static gint imap_cmd_do_select(IMAPSession *session, const gchar *folder,
3086                                gboolean examine,
3087                                gint *exists, gint *recent, gint *unseen,
3088                                guint32 *uid_validity, gboolean block)
3089 {
3090         gint ok;
3091         gchar *resp_str;
3092         GPtrArray *argbuf;
3093         gchar *select_cmd;
3094         gchar *folder_;
3095         unsigned int uid_validity_;
3096
3097         *exists = *recent = *unseen = *uid_validity = 0;
3098         argbuf = g_ptr_array_new();
3099
3100         if (examine)
3101                 select_cmd = "EXAMINE";
3102         else
3103                 select_cmd = "SELECT";
3104
3105         QUOTE_IF_REQUIRED(folder_, folder);
3106         imap_gen_send(session, "%s %s", select_cmd, folder_);
3107
3108         if ((ok = imap_cmd_ok_with_block(session, argbuf, block)) != IMAP_SUCCESS) THROW;
3109
3110         resp_str = search_array_contain_str(argbuf, "EXISTS");
3111         if (resp_str) {
3112                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
3113                         g_warning("imap_cmd_select(): invalid EXISTS line.\n");
3114                         THROW;
3115                 }
3116         }
3117
3118         resp_str = search_array_contain_str(argbuf, "RECENT");
3119         if (resp_str) {
3120                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
3121                         g_warning("imap_cmd_select(): invalid RECENT line.\n");
3122                         THROW;
3123                 }
3124         }
3125
3126         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
3127         if (resp_str) {
3128                 if (sscanf(resp_str, "OK [UIDVALIDITY %u] ", &uid_validity_)
3129                     != 1) {
3130                         g_warning("imap_cmd_select(): invalid UIDVALIDITY line.\n");
3131                         THROW;
3132                 }
3133                 *uid_validity = uid_validity_;
3134         }
3135
3136         resp_str = search_array_contain_str(argbuf, "UNSEEN");
3137         if (resp_str) {
3138                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
3139                         g_warning("imap_cmd_select(): invalid UNSEEN line.\n");
3140                         THROW;
3141                 }
3142         }
3143
3144 catch:
3145         ptr_array_free_strings(argbuf);
3146         g_ptr_array_free(argbuf, TRUE);
3147
3148         return ok;
3149 }
3150
3151 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
3152                             gint *exists, gint *recent, gint *unseen,
3153                             guint32 *uid_validity, gboolean block)
3154 {
3155         return imap_cmd_do_select(session, folder, FALSE,
3156                                   exists, recent, unseen, uid_validity, block);
3157 }
3158
3159 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
3160                              gint *exists, gint *recent, gint *unseen,
3161                              guint32 *uid_validity, gboolean block)
3162 {
3163         return imap_cmd_do_select(session, folder, TRUE,
3164                                   exists, recent, unseen, uid_validity, block);
3165 }
3166
3167 #undef THROW
3168
3169 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
3170 {
3171         gchar *folder_;
3172
3173         QUOTE_IF_REQUIRED(folder_, folder);
3174         imap_gen_send(session, "CREATE %s", folder_);
3175
3176         return imap_cmd_ok(session, NULL);
3177 }
3178
3179 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
3180                             const gchar *new_folder)
3181 {
3182         gchar *old_folder_, *new_folder_;
3183
3184         QUOTE_IF_REQUIRED(old_folder_, old_folder);
3185         QUOTE_IF_REQUIRED(new_folder_, new_folder);
3186         imap_gen_send(session, "RENAME %s %s", old_folder_, new_folder_);
3187
3188         return imap_cmd_ok(session, NULL);
3189 }
3190
3191 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
3192 {
3193         gchar *folder_;
3194
3195         QUOTE_IF_REQUIRED(folder_, folder);
3196         imap_gen_send(session, "DELETE %s", folder_);
3197
3198         return imap_cmd_ok(session, NULL);
3199 }
3200
3201 static gint imap_cmd_search(IMAPSession *session, const gchar *criteria, 
3202                             GSList **list, gboolean block)
3203 {
3204         gint ok;
3205         gchar *uidlist;
3206         GPtrArray *argbuf;
3207
3208         g_return_val_if_fail(criteria != NULL, IMAP_ERROR);
3209         g_return_val_if_fail(list != NULL, IMAP_ERROR);
3210
3211         *list = NULL;
3212         
3213         argbuf = g_ptr_array_new();
3214         imap_gen_send(session, "UID SEARCH %s", criteria);
3215
3216         ok = imap_cmd_ok_with_block(session, argbuf, block);
3217         if (ok != IMAP_SUCCESS) {
3218                 ptr_array_free_strings(argbuf);
3219                 g_ptr_array_free(argbuf, TRUE);
3220                 return ok;
3221         }
3222
3223         if ((uidlist = search_array_str(argbuf, "SEARCH ")) != NULL) {
3224                 gchar **strlist, **p;
3225
3226                 strlist = g_strsplit(uidlist + 7, " ", 0);
3227                 for (p = strlist; *p != NULL; ++p) {
3228                         guint msgnum;
3229
3230                         if (sscanf(*p, "%u", &msgnum) == 1)
3231                                 *list = g_slist_append(*list, GINT_TO_POINTER(msgnum));
3232                 }
3233                 g_strfreev(strlist);
3234         }
3235         ptr_array_free_strings(argbuf);
3236         g_ptr_array_free(argbuf, TRUE);
3237
3238         return IMAP_SUCCESS;
3239 }
3240
3241 typedef struct _fetch_data {
3242         IMAPSession *session;
3243         guint32 uid;
3244         const gchar *filename;
3245         gboolean headers;
3246         gboolean body;
3247         gboolean done;
3248 } fetch_data;
3249
3250 static void *imap_cmd_fetch_thread(void *data)
3251 {
3252         fetch_data *stuff = (fetch_data *)data;
3253         IMAPSession *session = stuff->session;
3254         guint32 uid = stuff->uid;
3255         const gchar *filename = stuff->filename;
3256         
3257         gint ok;
3258         gchar *buf = NULL;
3259         gchar *cur_pos;
3260         gchar size_str[32];
3261         glong size_num;
3262
3263         if (filename == NULL) {
3264                 stuff->done = TRUE;
3265                 return GINT_TO_POINTER(IMAP_ERROR);
3266         }
3267         
3268         if (stuff->body)
3269                 imap_gen_send(session, "UID FETCH %d BODY.PEEK[]", uid);
3270         else
3271                 imap_gen_send(session, "UID FETCH %d BODY.PEEK[HEADER]",
3272                                 uid);
3273         while ((ok = imap_gen_recv_block(session, &buf)) == IMAP_SUCCESS) {
3274                 if (buf[0] != '*' || buf[1] != ' ') {
3275                         g_free(buf);
3276                         stuff->done = TRUE;
3277                         return GINT_TO_POINTER(IMAP_ERROR);
3278                 }
3279                 if (strstr(buf, "FETCH") != NULL) break;
3280                 g_free(buf);
3281         }
3282         if (ok != IMAP_SUCCESS) {
3283                 g_free(buf);
3284                 stuff->done = TRUE;
3285                 return GINT_TO_POINTER(ok);
3286         }
3287
3288 #define RETURN_ERROR_IF_FAIL(cond)      \
3289         if (!(cond)) {                  \
3290                 g_free(buf);            \
3291                 stuff->done = TRUE;     \
3292                 return GINT_TO_POINTER(IMAP_ERROR);     \
3293         }
3294
3295         cur_pos = strchr(buf, '{');
3296         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
3297         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
3298         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
3299         size_num = atol(size_str);
3300         RETURN_ERROR_IF_FAIL(size_num >= 0);
3301
3302         RETURN_ERROR_IF_FAIL(*cur_pos == '\0');
3303
3304 #undef RETURN_ERROR_IF_FAIL
3305
3306         g_free(buf);
3307
3308         if (recv_bytes_write_to_file(SESSION(session)->sock,
3309                                      size_num, filename) != 0) {
3310                 stuff->done = TRUE;
3311                 return GINT_TO_POINTER(IMAP_ERROR);
3312         }
3313         if (imap_gen_recv_block(session, &buf) != IMAP_SUCCESS) {
3314                 g_free(buf);
3315                 stuff->done = TRUE;
3316                 return GINT_TO_POINTER(IMAP_ERROR);
3317         }
3318
3319         if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')') {
3320                 g_free(buf);
3321                 stuff->done = TRUE;
3322                 return GINT_TO_POINTER(IMAP_ERROR);
3323         }
3324         g_free(buf);
3325
3326         ok = imap_cmd_ok_block(session, NULL);
3327
3328         stuff->done = TRUE;
3329         return GINT_TO_POINTER(ok);
3330 }
3331
3332 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
3333                                 const gchar *filename, gboolean headers,
3334                                 gboolean body)
3335 {
3336         fetch_data *data = g_new0(fetch_data, 1);
3337         int result = 0;
3338 #ifdef USE_PTHREAD
3339         void *tmp;
3340         pthread_t pt;
3341 #endif
3342         data->done = FALSE;
3343         data->session = session;
3344         data->uid = uid;
3345         data->filename = filename;
3346         data->headers = headers;
3347         data->body = body;
3348
3349         if (prefs_common.work_offline && !imap_gtk_should_override()) {
3350                 g_free(data);
3351                 return -1;
3352         }
3353
3354 #if (defined USE_PTHREAD && defined __GLIBC__ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)))
3355         if (pthread_create(&pt, PTHREAD_CREATE_JOINABLE,
3356                         imap_cmd_fetch_thread, data) != 0) {
3357                 result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3358                 g_free(data);
3359                 return result;
3360         }
3361         debug_print("+++waiting for imap_cmd_fetch_thread...\n");
3362         while(!data->done) {
3363                 /* don't let the interface freeze while waiting */
3364                 sylpheed_do_idle();
3365         }
3366         debug_print("---imap_cmd_fetch_thread done\n");
3367
3368         /* get the thread's return value and clean its resources */
3369         pthread_join(pt, &tmp);
3370         result = GPOINTER_TO_INT(tmp);
3371 #else
3372         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
3373 #endif
3374         g_free(data);
3375         return result;
3376 }
3377
3378 static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
3379                             const gchar *file, IMAPFlags flags, 
3380                             guint32 *new_uid)
3381 {
3382         gint ok;
3383         gint size;
3384         gchar *destfolder_;
3385         gchar *flag_str;
3386         unsigned int new_uid_;
3387         gchar *ret = NULL;
3388         gchar buf[BUFFSIZE];
3389         FILE *fp;
3390         GPtrArray *argbuf;
3391         gchar *resp_str;
3392
3393         g_return_val_if_fail(file != NULL, IMAP_ERROR);
3394
3395         size = get_file_size_as_crlf(file);
3396         if ((fp = fopen(file, "rb")) == NULL) {
3397                 FILE_OP_ERROR(file, "fopen");
3398                 return -1;
3399         }
3400         QUOTE_IF_REQUIRED(destfolder_, destfolder);
3401         flag_str = imap_get_flag_str(flags);
3402         imap_gen_send(session, "APPEND %s (%s) {%d}", 
3403                       destfolder_, flag_str, size);
3404         g_free(flag_str);
3405
3406         ok = imap_gen_recv(session, &ret);
3407         if (ok != IMAP_SUCCESS || ret[0] != '+' || ret[1] != ' ') {
3408                 log_warning(_("can't append %s to %s\n"), file, destfolder_);
3409                 g_free(ret);
3410                 fclose(fp);
3411                 return IMAP_ERROR;
3412         }
3413         g_free(ret);
3414
3415         log_print("IMAP4> %s\n", "(sending file...)");
3416
3417         while (fgets(buf, sizeof(buf), fp) != NULL) {
3418                 strretchomp(buf);
3419                 if (sock_puts(SESSION(session)->sock, buf) < 0) {
3420                         fclose(fp);
3421                         return -1;
3422                 }
3423         }
3424
3425         if (ferror(fp)) {
3426                 FILE_OP_ERROR(file, "fgets");
3427                 fclose(fp);
3428                 return -1;
3429         }
3430
3431         sock_puts(SESSION(session)->sock, "");
3432
3433         fclose(fp);
3434
3435         if (new_uid != NULL)
3436                 *new_uid = 0;
3437
3438         if (new_uid != NULL && session->uidplus) {
3439                 argbuf = g_ptr_array_new();
3440
3441                 ok = imap_cmd_ok(session, argbuf);
3442                 if ((ok == IMAP_SUCCESS) && (argbuf->len > 0)) {
3443                         resp_str = g_ptr_array_index(argbuf, argbuf->len - 1);
3444                         if (resp_str &&
3445                             sscanf(resp_str, "%*u OK [APPENDUID %*u %u]",
3446                                    &new_uid_) == 1) {
3447                                 *new_uid = new_uid_;
3448                         }
3449                 }
3450
3451                 ptr_array_free_strings(argbuf);
3452                 g_ptr_array_free(argbuf, TRUE);
3453         } else
3454                 ok = imap_cmd_ok(session, NULL);
3455
3456         if (ok != IMAP_SUCCESS)
3457                 log_warning(_("can't append message to %s\n"),
3458                             destfolder_);
3459
3460         return ok;
3461 }
3462
3463 static MsgNumberList *imapset_to_numlist(IMAPSet imapset)
3464 {
3465         gchar **ranges, **range;
3466         unsigned int low, high;
3467         MsgNumberList *uids = NULL;
3468         
3469         ranges = g_strsplit(imapset, ",", 0);
3470         for (range = ranges; *range != NULL; range++) {
3471                 if (sscanf(*range, "%u:%u", &low, &high) == 1)
3472                         uids = g_slist_prepend(uids, GINT_TO_POINTER(low));
3473                 else {
3474                         int i;
3475                         for (i = low; i <= high; i++)
3476                                 uids = g_slist_prepend(uids, GINT_TO_POINTER(i));
3477                 }
3478         }