src/mh.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2013 Hiroyuki Yamamoto and the Claws Mail team
   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 3 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <dirent.h>
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32 #include <string.h>
  33 #include <errno.h>
  34 #include <time.h>
  35
  36 #include "folder.h"
  37 #include "folder_item_prefs.h"
  38 #include "mh.h"
  39 #include "procmsg.h"
  40 #include "procheader.h"
  41 #include "utils.h"
  42 #include "codeconv.h"
  43 #include "statusbar.h"
  44 #include "gtkutils.h"
  45 #include "timing.h"
  46 #include "msgcache.h"
  47
  48 /* Define possible missing constants for Windows. */
  49 #ifdef G_OS_WIN32
  50 # ifndef S_IRGRP
  51 # define S_IRGRP 0
  52 # define S_IWGRP 0
  53 # endif
  54 # ifndef S_IROTH
  55 # define S_IROTH 0
  56 # define S_IWOTH 0
  57 # endif
  58 #endif
  59
  60
  61 static void     mh_folder_init          (Folder         *folder,
  62                                          const gchar    *name,
  63                                          const gchar    *path);
  64
  65 static Folder   *mh_folder_new          (const gchar    *name,
  66                                          const gchar    *path);
  67 static void     mh_folder_destroy       (Folder         *folder);
  68 static gchar   *mh_fetch_msg            (Folder         *folder,
  69                                          FolderItem     *item,
  70                                          gint            num);
  71 static MsgInfo *mh_get_msginfo          (Folder         *folder,
  72                                          FolderItem     *item,
  73                                          gint            num);
  74 static gint     mh_add_msg              (Folder         *folder,
  75                                          FolderItem     *dest,
  76                                          const gchar    *file,
  77                                          MsgFlags       *flags);
  78 static gint     mh_add_msgs             (Folder         *folder,
  79                                          FolderItem     *dest,
  80                                          GSList         *file_list,
  81                                          GHashTable     *relation);
  82 static gint     mh_copy_msg             (Folder         *folder,
  83                                          FolderItem     *dest,
  84                                          MsgInfo        *msginfo);
  85 static gint     mh_copy_msgs            (Folder         *folder,
  86                                          FolderItem     *dest,
  87                                          MsgInfoList    *msglist,
  88                                          GHashTable     *relation);
  89 static gint     mh_remove_msg           (Folder         *folder,
  90                                          FolderItem     *item,
  91                                          gint            num);
  92 static gint     mh_remove_msgs          (Folder         *folder,
  93                                          FolderItem     *item,
  94                                          MsgInfoList    *msglist,
  95                                          GHashTable     *relation);
  96 static gint     mh_remove_all_msg       (Folder         *folder,
  97                                          FolderItem     *item);
  98 static gboolean mh_is_msg_changed       (Folder         *folder,
  99                                          FolderItem     *item,
 100                                          MsgInfo        *msginfo);
 101
 102 static gint     mh_get_num_list         (Folder         *folder,
 103                                          FolderItem     *item,
 104                                          GSList         **list,
 105                                          gboolean       *old_uids_valid);
 106 static gint     mh_scan_tree            (Folder         *folder);
 107
 108 static gint    mh_create_tree           (Folder         *folder);
 109 static FolderItem *mh_create_folder     (Folder         *folder,
 110                                          FolderItem     *parent,
 111                                          const gchar    *name);
 112 static gint    mh_rename_folder         (Folder         *folder,
 113                                          FolderItem     *item,
 114                                          const gchar    *name);
 115 static gint    mh_remove_folder         (Folder         *folder,
 116                                          FolderItem     *item);
 117
 118 static gchar   *mh_get_new_msg_filename         (FolderItem     *dest);
 119
 120 static MsgInfo *mh_parse_msg                    (const gchar    *file,
 121                                                  FolderItem     *item);
 122 static void     mh_remove_missing_folder_items  (Folder         *folder);
 123 static gchar    *mh_filename_from_utf8          (const gchar    *path);
 124 static gchar    *mh_filename_to_utf8            (const gchar    *path);
 125 static void     mh_scan_tree_recursive          (FolderItem     *item);
 126
 127 static gboolean mh_rename_folder_func           (GNode          *node,
 128                                                  gpointer        data);
 129 static gchar   *mh_item_get_path                (Folder *folder,
 130                                                  FolderItem *item);
 131
 132 static gboolean mh_scan_required        (Folder         *folder,
 133                                          FolderItem     *item);
 134 static void mh_set_mtime                (Folder         *folder,
 135                                          FolderItem *item);
 136 static int mh_item_close                (Folder         *folder,
 137                                          FolderItem     *item);
 138 #if 0
 139 static gint mh_get_flags                (Folder *folder, FolderItem *item,
 140                                          MsgInfoList *msginfo_list, GHashTable *msgflags);
 141 #endif
 142 static void mh_write_sequences          (FolderItem     *item, gboolean remove_unseen);
 143
 144 static FolderClass mh_class;
 145
 146 FolderClass *mh_get_class(void)
 147 {
 148         if (mh_class.idstr == NULL) {
 149                 mh_class.type = F_MH;
 150                 mh_class.idstr = "mh";
 151                 mh_class.uistr = "MH";
 152                 mh_class.supports_server_search = FALSE;
 153
 154                 /* Folder functions */
 155                 mh_class.new_folder = mh_folder_new;
 156                 mh_class.destroy_folder = mh_folder_destroy;
 157                 mh_class.set_xml = folder_local_set_xml;
 158                 mh_class.get_xml = folder_local_get_xml;
 159                 mh_class.scan_tree = mh_scan_tree;
 160                 mh_class.create_tree = mh_create_tree;
 161
 162                 /* FolderItem functions */
 163                 mh_class.item_get_path = mh_item_get_path;
 164                 mh_class.create_folder = mh_create_folder;
 165                 mh_class.rename_folder = mh_rename_folder;
 166                 mh_class.remove_folder = mh_remove_folder;
 167                 mh_class.get_num_list = mh_get_num_list;
 168                 mh_class.scan_required = mh_scan_required;
 169                 mh_class.set_mtime = mh_set_mtime;
 170                 mh_class.close = mh_item_close;
 171                 mh_class.get_flags = NULL; /*mh_get_flags */;
 172
 173                 /* Message functions */
 174                 mh_class.get_msginfo = mh_get_msginfo;
 175                 mh_class.fetch_msg = mh_fetch_msg;
 176                 mh_class.add_msg = mh_add_msg;
 177                 mh_class.add_msgs = mh_add_msgs;
 178                 mh_class.copy_msg = mh_copy_msg;
 179                 mh_class.copy_msgs = mh_copy_msgs;
 180                 mh_class.search_msgs = folder_item_search_msgs_local;
 181                 mh_class.remove_msg = mh_remove_msg;
 182                 mh_class.remove_msgs = mh_remove_msgs;
 183                 mh_class.remove_all_msg = mh_remove_all_msg;
 184                 mh_class.is_msg_changed = mh_is_msg_changed;
 185         }
 186
 187         return &mh_class;
 188 }
 189
 190 static Folder *mh_folder_new(const gchar *name, const gchar *path)
 191 {
 192         Folder *folder;
 193
 194         folder = (Folder *)g_new0(MHFolder, 1);
 195         folder->klass = &mh_class;
 196         mh_folder_init(folder, name, path);
 197
 198         return folder;
 199 }
 200
 201 static void mh_folder_destroy(Folder *folder)
 202 {
 203         folder_local_folder_destroy(LOCAL_FOLDER(folder));
 204 }
 205
 206 static void mh_folder_init(Folder *folder, const gchar *name, const gchar *path)
 207 {
 208         folder_local_folder_init(folder, name, path);
 209
 210 }
 211
 212 gboolean mh_scan_required(Folder *folder, FolderItem *item)
 213 {
 214         gchar *path;
 215         GStatBuf s;
 216
 217         path = folder_item_get_path(item);
 218         cm_return_val_if_fail(path != NULL, FALSE);
 219
 220         if (g_stat(path, &s) < 0) {
 221                 FILE_OP_ERROR(path, "stat");
 222                 g_free(path);
 223                 return FALSE;
 224         }
 225
 226         if ((s.st_mtime > item->mtime) &&
 227                 (s.st_mtime - 3600 != item->mtime)) {
 228                 debug_print("MH scan required, folder updated: %s (%ld > %ld)\n",
 229                             path?path:"(null)",
 230                             (long int) s.st_mtime,
 231                             (long int) item->mtime);
 232                 g_free(path);
 233                 return TRUE;
 234         }
 235
 236         debug_print("MH scan not required: %s (%ld <= %ld)\n",
 237                     path?path:"(null)",
 238                     (long int) s.st_mtime,
 239                     (long int) item->mtime);
 240         g_free(path);
 241         return FALSE;
 242 }
 243
 244 static void mh_get_last_num(Folder *folder, FolderItem *item)
 245 {
 246         gchar *path, *fullpath;
 247         GDir *dp;
 248         const gchar *d;
 249         GError *error = NULL;
 250         gint max = 0;
 251         gint num;
 252
 253         cm_return_if_fail(item != NULL);
 254
 255         debug_print("mh_get_last_num(): Scanning %s ...\n", item->path?item->path:"(null)");
 256
 257         path = folder_item_get_path(item);
 258         cm_return_if_fail(path != NULL);
 259
 260         if ((dp = g_dir_open(path, 0, &error)) == NULL) {
 261                 g_message("Couldn't open current directory: %s (%d).\n",
 262                                 error->message, error->code);
 263                 g_error_free(error);
 264                 g_free(path);
 265                 return;
 266         }
 267
 268         while ((d = g_dir_read_name(dp)) != NULL) {
 269                 fullpath = g_strconcat(path, G_DIR_SEPARATOR_S, d, NULL);
 270                 if ((num = to_number(d)) > 0 &&
 271                     g_file_test(fullpath, G_FILE_TEST_IS_REGULAR)) {
 272                         if (max < num)
 273                                 max = num;
 274                 }
 275                 if (num % 2000 == 0)
 276                         GTK_EVENTS_FLUSH();
 277         }
 278         g_dir_close(dp);
 279         g_free(fullpath);
 280         g_free(path);
 281
 282         debug_print("Last number in dir %s = %d\n", item->path?item->path:"(null)", max);
 283         item->last_num = max;
 284 }
 285
 286 gint mh_get_num_list(Folder *folder, FolderItem *item, GSList **list, gboolean *old_uids_valid)
 287 {
 288
 289         gchar *path;
 290         GDir *dp;
 291         const gchar *d;
 292         GError *error = NULL;
 293         gint num, nummsgs = 0;
 294
 295         cm_return_val_if_fail(item != NULL, -1);
 296
 297         debug_print("mh_get_num_list(): Scanning %s ...\n", item->path?item->path:"(null)");
 298
 299         *old_uids_valid = TRUE;
 300
 301         path = folder_item_get_path(item);
 302         cm_return_val_if_fail(path != NULL, -1);
 303
 304         if ((dp = g_dir_open(path, 0, &error)) == NULL) {
 305                 g_message("Couldn't open current directory: %s (%d).\n",
 306                                 error->message, error->code);
 307                 g_error_free(error);
 308                 g_free(path);
 309                 return -1;
 310         }
 311         g_free(path);
 312
 313         while ((d = g_dir_read_name(dp)) != NULL) {
 314                 if ((num = to_number(d)) > 0) {
 315                         *list = g_slist_prepend(*list, GINT_TO_POINTER(num));
 316                         nummsgs++;
 317                 }
 318         }
 319         g_dir_close(dp);
 320
 321         mh_set_mtime(folder, item);
 322         return nummsgs;
 323 }
 324
 325 static gchar *mh_fetch_msg(Folder *folder, FolderItem *item, gint num)
 326 {
 327         gchar *path;
 328         gchar *file;
 329
 330         cm_return_val_if_fail(item != NULL, NULL);
 331         cm_return_val_if_fail(num > 0, NULL);
 332
 333         path = folder_item_get_path(item);
 334         file = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 335
 336         if (!is_file_exist(file)) {
 337                 g_free(file);
 338                 g_free(path);
 339                 return NULL;
 340         }
 341         g_free(path);
 342         return file;
 343 }
 344
 345 static MsgInfo *mh_get_msginfo(Folder *folder, FolderItem *item, gint num)
 346 {
 347         MsgInfo *msginfo;
 348         gchar *file;
 349
 350         cm_return_val_if_fail(item != NULL, NULL);
 351         if (num <= 0)
 352                 return NULL;
 353
 354         file = mh_fetch_msg(folder, item, num);
 355         if (!file) return NULL;
 356
 357         msginfo = mh_parse_msg(file, item);
 358         if (msginfo)
 359                 msginfo->msgnum = num;
 360
 361         g_free(file);
 362
 363         return msginfo;
 364 }
 365
 366 static gchar *mh_get_new_msg_filename(FolderItem *dest)
 367 {
 368         gchar *destfile;
 369         gchar *destpath;
 370
 371         destpath = folder_item_get_path(dest);
 372         cm_return_val_if_fail(destpath != NULL, NULL);
 373
 374         if (dest->last_num < 0) {
 375                 mh_get_last_num(dest->folder, dest);
 376                 if (dest->last_num < 0) return NULL;
 377         }
 378
 379         if (!is_dir_exist(destpath))
 380                 make_dir_hier(destpath);
 381
 382         for (;;) {
 383                 destfile = g_strdup_printf("%s%c%d", destpath, G_DIR_SEPARATOR,
 384                                            dest->last_num + 1);
 385                 if (is_file_entry_exist(destfile)) {
 386                         dest->last_num++;
 387                         g_free(destfile);
 388                 } else
 389                         break;
 390         }
 391
 392         g_free(destpath);
 393
 394         return destfile;
 395 }
 396
 397 static gint mh_add_msg(Folder *folder, FolderItem *dest, const gchar *file, MsgFlags *flags)
 398 {
 399         gint ret;
 400         GSList file_list;
 401         MsgFileInfo fileinfo;
 402
 403         cm_return_val_if_fail(file != NULL, -1);
 404
 405         fileinfo.msginfo = NULL;
 406         fileinfo.file = (gchar *)file;
 407         fileinfo.flags = flags;
 408         file_list.data = &fileinfo;
 409         file_list.next = NULL;
 410
 411         ret = mh_add_msgs(folder, dest, &file_list, NULL);
 412         return ret;
 413 }
 414
 415 static gint mh_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
 416                  GHashTable *relation)
 417 {
 418         gchar *destfile;
 419         GSList *cur;
 420         MsgFileInfo *fileinfo;
 421
 422         cm_return_val_if_fail(dest != NULL, -1);
 423         cm_return_val_if_fail(file_list != NULL, -1);
 424
 425         if (dest->last_num < 0) {
 426                 mh_get_last_num(folder, dest);
 427                 if (dest->last_num < 0) return -1;
 428         }
 429
 430         for (cur = file_list; cur != NULL; cur = cur->next) {
 431                 fileinfo = (MsgFileInfo *)cur->data;
 432
 433                 destfile = mh_get_new_msg_filename(dest);
 434                 if (destfile == NULL) return -1;
 435
 436 #ifdef G_OS_UNIX
 437                 if (link(fileinfo->file, destfile) < 0) {
 438 #endif
 439                         if (copy_file(fileinfo->file, destfile, TRUE) < 0) {
 440                                 g_warning("can't copy message %s to %s",
 441                                           fileinfo->file, destfile);
 442                                 g_free(destfile);
 443                                 return -1;
 444                         }
 445 #ifdef G_OS_UNIX
 446                 }
 447 #endif
 448
 449                 if (relation != NULL)
 450                         g_hash_table_insert(relation, fileinfo, GINT_TO_POINTER(dest->last_num + 1));
 451                 g_free(destfile);
 452                 dest->last_num++;
 453         }
 454         mh_write_sequences(dest, TRUE);
 455         return dest->last_num;
 456 }
 457
 458 static gint mh_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 459 {
 460         GSList msglist;
 461
 462         cm_return_val_if_fail(msginfo != NULL, -1);
 463
 464         msglist.data = msginfo;
 465         msglist.next = NULL;
 466
 467         return mh_copy_msgs(folder, dest, &msglist, NULL);
 468 }
 469
 470 static gint mh_copy_msgs(Folder *folder, FolderItem *dest, MsgInfoList *msglist,
 471                          GHashTable *relation)
 472 {
 473         gboolean dest_need_scan = FALSE;
 474         gboolean src_need_scan = FALSE;
 475         FolderItem *src = NULL;
 476         gchar *srcfile;
 477         gchar *destfile;
 478         FolderItemPrefs *prefs;
 479         MsgInfo *msginfo = NULL;
 480         MsgInfoList *cur = NULL;
 481         gint curnum = 0, total = 0;
 482         gchar *srcpath = NULL;
 483         gboolean full_fetch = FALSE;
 484         time_t last_dest_mtime = (time_t)0;
 485         time_t last_src_mtime = (time_t)0;
 486
 487         cm_return_val_if_fail(dest != NULL, -1);
 488         cm_return_val_if_fail(msglist != NULL, -1);
 489
 490         msginfo = (MsgInfo *)msglist->data;
 491
 492         cm_return_val_if_fail(msginfo != NULL, -1);
 493
 494         if (msginfo->folder == dest) {
 495                 g_warning("the src folder is identical to the dest.");
 496                 return -1;
 497         }
 498
 499         if (msginfo->folder->folder != dest->folder)
 500                 full_fetch = TRUE;
 501
 502         if (FOLDER_TYPE(msginfo->folder->folder) == F_MH) {
 503                 src = msginfo->folder;
 504         }
 505
 506         if (dest->last_num < 0) {
 507                 mh_get_last_num(folder, dest);
 508                 if (dest->last_num < 0) return -1;
 509         }
 510
 511         prefs = dest->prefs;
 512
 513         srcpath = folder_item_get_path(msginfo->folder);
 514
 515         dest_need_scan = mh_scan_required(dest->folder, dest);
 516         last_dest_mtime = dest->mtime;
 517
 518         if (src) {
 519                 src_need_scan = mh_scan_required(src->folder, src);
 520                 last_src_mtime = src->mtime;
 521         }
 522
 523         total = g_slist_length(msglist);
 524         if (total > 100) {
 525                 if (MSG_IS_MOVE(msginfo->flags))
 526                         statusbar_print_all(_("Moving messages..."));
 527                 else
 528                         statusbar_print_all(_("Copying messages..."));
 529         }
 530         for (cur = msglist; cur; cur = cur->next) {
 531                 msginfo = (MsgInfo *)cur->data;
 532                 if (!msginfo) {
 533                         goto err_reset_status;
 534                 }
 535                 if (!full_fetch) {
 536                         srcfile = g_strconcat(srcpath,
 537                                 G_DIR_SEPARATOR_S,
 538                                 itos(msginfo->msgnum), NULL);
 539                 } else {
 540                         srcfile = procmsg_get_message_file(msginfo);
 541                 }
 542                 if (!srcfile) {
 543                         goto err_reset_status;
 544                 }
 545                 destfile = mh_get_new_msg_filename(dest);
 546                 if (!destfile) {
 547                         g_free(srcfile);
 548                         goto err_reset_status;
 549                 }
 550
 551                 if (total > 100) {
 552                         statusbar_progress_all(curnum, total, 100);
 553                         if (curnum % 100 == 0)
 554                                 GTK_EVENTS_FLUSH();
 555                         curnum++;
 556                 }
 557
 558                 debug_print("Copying message %s%c%d to %s ...\n",
 559                             msginfo->folder->path, G_DIR_SEPARATOR,
 560                             msginfo->msgnum, dest->path);
 561
 562
 563                 if (MSG_IS_MOVE(msginfo->flags)) {
 564                         msginfo->flags.tmp_flags &= ~MSG_MOVE_DONE;
 565                         if (move_file(srcfile, destfile, TRUE) < 0) {
 566                                 FILE_OP_ERROR(srcfile, "move");
 567                                 if (copy_file(srcfile, destfile, TRUE) < 0) {
 568                                         FILE_OP_ERROR(srcfile, "copy");
 569                                         g_free(srcfile);
 570                                         g_free(destfile);
 571                                         goto err_reset_status;
 572                                 }
 573                         } else {
 574                                 /* say unlinking's not necessary */
 575                                 msginfo->flags.tmp_flags |= MSG_MOVE_DONE;
 576                         }
 577                 } else if (copy_file(srcfile, destfile, TRUE) < 0) {
 578                         FILE_OP_ERROR(srcfile, "copy");
 579                         g_free(srcfile);
 580                         g_free(destfile);
 581                         goto err_reset_status;
 582                 }
 583                 if (prefs && prefs->enable_folder_chmod && prefs->folder_chmod) {
 584                         if (chmod(destfile, prefs->folder_chmod) < 0)
 585                                 FILE_OP_ERROR(destfile, "chmod");
 586                 }
 587                 if (relation) {
 588                         if (g_hash_table_lookup(relation, msginfo) != NULL)
 589                                 g_warning("already in: %p", msginfo);
 590
 591                         g_hash_table_insert(relation, msginfo, GINT_TO_POINTER(dest->last_num+1));
 592                 }
 593                 g_free(srcfile);
 594                 g_free(destfile);
 595                 dest->last_num++;
 596         }
 597
 598         g_free(srcpath);
 599         mh_write_sequences(dest, TRUE);
 600
 601         if (dest->mtime == last_dest_mtime && !dest_need_scan) {
 602                 mh_set_mtime(folder, dest);
 603         }
 604
 605         if (src && src->mtime == last_src_mtime && !src_need_scan) {
 606                 mh_set_mtime(folder, src);
 607         }
 608
 609         if (total > 100) {
 610                 statusbar_progress_all(0,0,0);
 611                 statusbar_pop_all();
 612         }
 613         return dest->last_num;
 614 err_reset_status:
 615         g_free(srcpath);
 616         mh_write_sequences(dest, TRUE);
 617         if (total > 100) {
 618                 statusbar_progress_all(0,0,0);
 619                 statusbar_pop_all();
 620         }
 621         return -1;
 622
 623 }
 624
 625 static gint mh_remove_msg(Folder *folder, FolderItem *item, gint num)
 626 {
 627         gboolean need_scan = FALSE;
 628         time_t last_mtime = (time_t)0;
 629         gchar *file;
 630
 631         cm_return_val_if_fail(item != NULL, -1);
 632
 633         file = mh_fetch_msg(folder, item, num);
 634         cm_return_val_if_fail(file != NULL, -1);
 635
 636         need_scan = mh_scan_required(folder, item);
 637         last_mtime = item->mtime;
 638
 639         if (claws_unlink(file) < 0) {
 640                 FILE_OP_ERROR(file, "unlink");
 641                 g_free(file);
 642                 return -1;
 643         }
 644
 645         if (item->mtime == last_mtime && !need_scan) {
 646                 mh_set_mtime(folder, item);
 647         }
 648         g_free(file);
 649         return 0;
 650 }
 651
 652 static gint mh_remove_msgs(Folder *folder, FolderItem *item,
 653                     MsgInfoList *msglist, GHashTable *relation)
 654 {
 655         gboolean need_scan = FALSE;
 656         gchar *path, *file;
 657         time_t last_mtime = (time_t)0;
 658         MsgInfoList *cur;
 659         gint total = 0, curnum = 0;
 660
 661         cm_return_val_if_fail(item != NULL, -1);
 662
 663         path = folder_item_get_path(item);
 664
 665         need_scan = mh_scan_required(folder, item);
 666         last_mtime = item->mtime;
 667
 668         total = g_slist_length(msglist);
 669         if (total > 100) {
 670                 statusbar_print_all(_("Deleting messages..."));
 671         }
 672
 673         for (cur = msglist; cur; cur = cur->next) {
 674                 MsgInfo *msginfo = (MsgInfo *)cur->data;
 675                 if (msginfo == NULL)
 676                         continue;
 677                 if (MSG_IS_MOVE(msginfo->flags) && MSG_IS_MOVE_DONE(msginfo->flags)) {
 678                         msginfo->flags.tmp_flags &= ~MSG_MOVE_DONE;
 679                         continue;
 680                 }
 681                 if (total > 100) {
 682                         statusbar_progress_all(curnum, total, 100);
 683                         if (curnum % 100 == 0)
 684                                 GTK_EVENTS_FLUSH();
 685                         curnum++;
 686                 }
 687
 688                 file = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
 689                 if (file == NULL)
 690                         continue;
 691
 692                 if (claws_unlink(file) < 0) {
 693                         g_free(file);
 694                         continue;
 695                 }
 696
 697                 g_free(file);
 698         }
 699
 700         if (total > 100) {
 701                 statusbar_progress_all(0,0,0);
 702                 statusbar_pop_all();
 703         }
 704         if (item->mtime == last_mtime && !need_scan) {
 705                 mh_set_mtime(folder, item);
 706         }
 707
 708         g_free(path);
 709         return 0;
 710 }
 711
 712 static gint mh_remove_all_msg(Folder *folder, FolderItem *item)
 713 {
 714         gchar *path;
 715         gint val;
 716
 717         cm_return_val_if_fail(item != NULL, -1);
 718
 719         path = folder_item_get_path(item);
 720         cm_return_val_if_fail(path != NULL, -1);
 721         val = remove_all_numbered_files(path);
 722         g_free(path);
 723
 724         mh_write_sequences(item, TRUE);
 725
 726         return val;
 727 }
 728
 729 static gboolean mh_is_msg_changed(Folder *folder, FolderItem *item,
 730                                   MsgInfo *msginfo)
 731 {
 732         GStatBuf s;
 733         gchar *path;
 734
 735         path = g_strdup_printf("%s%c%d", folder_item_get_path(item),
 736                         G_DIR_SEPARATOR, msginfo->msgnum);
 737         if (g_stat((path), &s) < 0 ||
 738             msginfo->size  != s.st_size || (
 739                 (msginfo->mtime - s.st_mtime != 0) &&
 740                 (msginfo->mtime - s.st_mtime != 3600) &&
 741                 (msginfo->mtime - s.st_mtime != -3600))) {
 742                 g_free(path);
 743                 return TRUE;
 744         }
 745
 746         g_free(path);
 747         return FALSE;
 748 }
 749
 750 static gint mh_scan_tree(Folder *folder)
 751 {
 752         FolderItem *item;
 753
 754         cm_return_val_if_fail(folder != NULL, -1);
 755
 756         if (!folder->node) {
 757                 item = folder_item_new(folder, folder->name, NULL);
 758                 item->folder = folder;
 759                 folder->node = item->node = g_node_new(item);
 760         } else
 761                 item = FOLDER_ITEM(folder->node->data);
 762
 763         mh_create_tree(folder);
 764         mh_remove_missing_folder_items(folder);
 765         mh_scan_tree_recursive(item);
 766
 767         return 0;
 768 }
 769
 770 #define MAKE_DIR_IF_NOT_EXIST(dir) \
 771 { \
 772         if (!is_dir_exist(dir)) { \
 773                 if (is_file_exist(dir)) { \
 774                         g_warning("File '%s' already exists. " \
 775                                     "Can't create folder.", dir); \
 776                         return -1; \
 777                 } \
 778                 if (make_dir_hier(dir) < 0) \
 779                         return -1; \
 780                 debug_print("Created dir '%s'\n", dir); \
 781         } \
 782 }
 783
 784 static gint mh_create_tree(Folder *folder)
 785 {
 786         gchar *rootpath, *f, *path;
 787
 788         cm_return_val_if_fail(folder != NULL, -1);
 789
 790         rootpath = LOCAL_FOLDER(folder)->rootpath;
 791 #ifdef G_OS_UNIX
 792         if (*rootpath == '/') {
 793 #elif G_OS_WIN32
 794         if (g_ascii_isalpha(*rootpath) && !strncmp(rootpath + 1, "\:", 2)) {
 795 #endif
 796                 /* Folder path is absolute. */
 797                 rootpath = g_strdup(rootpath);
 798         } else {
 799                 /* Folder path is relative, using mail base dir. */
 800                 rootpath = g_strconcat(get_mail_base_dir(), G_DIR_SEPARATOR_S,
 801                                 rootpath, NULL);
 802         }
 803
 804         MAKE_DIR_IF_NOT_EXIST(rootpath);
 805
 806         /* Create special directories as needed */
 807         if (folder->inbox != NULL &&
 808                         folder->inbox->path != NULL)
 809                 f = folder->inbox->path;
 810         else
 811                 f = INBOX_DIR;
 812         path = g_strconcat(rootpath, G_DIR_SEPARATOR_S, f, NULL);
 813         MAKE_DIR_IF_NOT_EXIST(path);
 814         g_free(path);
 815
 816         if (folder->outbox != NULL &&
 817                         folder->outbox->path != NULL)
 818                 f = folder->outbox->path;
 819         else
 820                 f = OUTBOX_DIR;
 821         path = g_strconcat(rootpath, G_DIR_SEPARATOR_S, f, NULL);
 822         MAKE_DIR_IF_NOT_EXIST(path);
 823         g_free(path);
 824
 825         if (folder->draft != NULL &&
 826                         folder->draft->path != NULL)
 827                 f = folder->draft->path;
 828         else
 829                 f = DRAFT_DIR;
 830         path = g_strconcat(rootpath, G_DIR_SEPARATOR_S, f, NULL);
 831         MAKE_DIR_IF_NOT_EXIST(path);
 832         g_free(path);
 833
 834         if (folder->queue != NULL &&
 835                         folder->queue->path != NULL)
 836                 f = folder->queue->path;
 837         else
 838                 f = QUEUE_DIR;
 839         path = g_strconcat(rootpath, G_DIR_SEPARATOR_S, f, NULL);
 840         MAKE_DIR_IF_NOT_EXIST(path);
 841         g_free(path);
 842
 843         if (folder->trash != NULL &&
 844                         folder->trash->path != NULL)
 845                 f = folder->trash->path;
 846         else
 847                 f = TRASH_DIR;
 848         path = g_strconcat(rootpath, G_DIR_SEPARATOR_S, f, NULL);
 849         MAKE_DIR_IF_NOT_EXIST(path);
 850         g_free(path);
 851
 852         g_free(rootpath);
 853         return 0;
 854 }
 855
 856 #undef MAKE_DIR_IF_NOT_EXIST
 857
 858 static gchar *mh_item_get_path(Folder *folder, FolderItem *item)
 859 {
 860         gchar *folder_path, *path;
 861         gchar *real_path;
 862         cm_return_val_if_fail(folder != NULL, NULL);
 863         cm_return_val_if_fail(item != NULL, NULL);
 864
 865         folder_path = g_strdup(LOCAL_FOLDER(folder)->rootpath);
 866         cm_return_val_if_fail(folder_path != NULL, NULL);
 867
 868         /* FIXME: [W32] The code below does not correctly merge
 869            relative filenames; there should be a function to handle
 870            this.  */
 871         if ( !is_relative_filename (folder_path) ) {
 872                 if (item->path)
 873                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
 874                                            item->path, NULL);
 875                 else
 876                         path = g_strdup(folder_path);
 877         } else {
 878                 if (item->path)
 879                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 880                                            folder_path, G_DIR_SEPARATOR_S,
 881                                            item->path, NULL);
 882                 else
 883                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 884                                            folder_path, NULL);
 885         }
 886         g_free(folder_path);
 887         real_path = mh_filename_from_utf8(path);
 888         if (!is_dir_exist(real_path) && is_dir_exist(path)) {
 889                 /* mmh, older version did put utf8 filenames instead of
 890                  * the correct encoding */
 891                 if (g_rename(path, real_path) == 0)
 892                         folder_item_scan(item);
 893         }
 894
 895         g_free(path);
 896         return real_path;
 897 }
 898
 899 static gboolean mh_renumber_msg(MsgInfo *info)
 900 {
 901         gchar *src, *dest;
 902         gboolean result = FALSE;
 903         guint num;
 904         cm_return_val_if_fail(info != NULL, FALSE);
 905
 906         src = folder_item_fetch_msg(info->folder, info->msgnum);
 907         dest = mh_get_new_msg_filename(info->folder);
 908         num = info->folder->last_num + 1;
 909
 910         if (move_file(src, dest, FALSE) == 0) {
 911                 msgcache_remove_msg(info->folder->cache, info->msgnum);
 912                 info->msgnum = num;
 913                 msgcache_add_msg(info->folder->cache, info);
 914                 result = TRUE;
 915         }
 916
 917         g_free(src);
 918         g_free(dest);
 919
 920         return result;
 921 }
 922
 923 static FolderItem *mh_create_folder(Folder *folder, FolderItem *parent,
 924                                     const gchar *name)
 925 {
 926         gchar *path, *real_name;
 927         gchar *fullpath;
 928         FolderItem *new_item;
 929         gchar *mh_sequences_filename;
 930         FILE *mh_sequences_file;
 931
 932         cm_return_val_if_fail(folder != NULL, NULL);
 933         cm_return_val_if_fail(parent != NULL, NULL);
 934         cm_return_val_if_fail(name != NULL, NULL);
 935
 936         path = folder_item_get_path(parent);
 937         if (!is_dir_exist(path))
 938                 if (make_dir_hier(path) != 0)
 939                         return NULL;
 940
 941         real_name = mh_filename_from_utf8(name);
 942         fullpath = g_strconcat(path, G_DIR_SEPARATOR_S, real_name, NULL);
 943         g_free(real_name);
 944         g_free(path);
 945
 946         if (to_number(name) > 0) {
 947                 MsgInfo *info = folder_item_get_msginfo(parent, to_number(name));
 948                 if (info != NULL) {
 949                         gboolean ok = mh_renumber_msg(info);
 950                         procmsg_msginfo_free(&info);
 951                         if (!ok) {
 952                                 g_free(fullpath);
 953                                 return NULL;
 954                         }
 955                 }
 956         }
 957
 958         if (make_dir(fullpath) < 0) {
 959                 g_free(fullpath);
 960                 return NULL;
 961         }
 962
 963         g_free(fullpath);
 964
 965         if (parent->path)
 966                 path = g_strconcat(parent->path, G_DIR_SEPARATOR_S, name,
 967                                    NULL);
 968         else
 969                 path = g_strdup(name);
 970         new_item = folder_item_new(folder, name, path);
 971         folder_item_append(parent, new_item);
 972
 973         g_free(path);
 974
 975         path = folder_item_get_path(new_item);
 976         mh_sequences_filename = g_strconcat(path, G_DIR_SEPARATOR_S,
 977                                             ".mh_sequences", NULL);
 978         if ((mh_sequences_file = g_fopen(mh_sequences_filename, "a+b")) != NULL) {
 979                 fclose(mh_sequences_file);
 980         }
 981         g_free(mh_sequences_filename);
 982         g_free(path);
 983
 984         return new_item;
 985 }
 986
 987 static gint mh_rename_folder(Folder *folder, FolderItem *item,
 988                              const gchar *name)
 989 {
 990         gchar *real_name;
 991         gchar *oldpath;
 992         gchar *dirname;
 993         gchar *newpath, *utf8newpath;
 994         gchar *paths[2];
 995
 996         cm_return_val_if_fail(folder != NULL, -1);
 997         cm_return_val_if_fail(item != NULL, -1);
 998         cm_return_val_if_fail(item->path != NULL, -1);
 999         cm_return_val_if_fail(name != NULL, -1);
1000
1001         oldpath = folder_item_get_path(item);
1002         if (!is_dir_exist(oldpath))
1003                 make_dir_hier(oldpath);
1004
1005         dirname = g_path_get_dirname(oldpath);
1006         real_name = mh_filename_from_utf8(name);
1007         newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S, real_name, NULL);
1008         g_free(real_name);
1009
1010         if (g_rename(oldpath, newpath) < 0) {
1011                 FILE_OP_ERROR(oldpath, "rename");
1012                 g_free(oldpath);
1013                 g_free(newpath);
1014                 return -1;
1015         }
1016
1017         g_free(oldpath);
1018         g_free(newpath);
1019
1020         if (strchr(item->path, G_DIR_SEPARATOR) != NULL) {
1021                 dirname = g_path_get_dirname(item->path);
1022                 utf8newpath = g_strconcat(dirname, G_DIR_SEPARATOR_S,
1023                                           name, NULL);
1024                 g_free(dirname);
1025         } else
1026                 utf8newpath = g_strdup(name);
1027
1028         g_free(item->name);
1029         item->name = g_strdup(name);
1030
1031         paths[0] = g_strdup(item->path);
1032         paths[1] = utf8newpath;
1033         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1034                         mh_rename_folder_func, paths);
1035
1036         g_free(paths[0]);
1037         g_free(paths[1]);
1038         return 0;
1039 }
1040
1041 static gint mh_remove_folder(Folder *folder, FolderItem *item)
1042 {
1043         gchar *path;
1044         gint ret;
1045
1046         cm_return_val_if_fail(folder != NULL, -1);
1047         cm_return_val_if_fail(item != NULL, -1);
1048         cm_return_val_if_fail(item->path != NULL, -1);
1049
1050         path = folder_item_get_path(item);
1051         if ((ret = remove_dir_recursive(path)) < 0) {
1052                 g_warning("can't remove directory '%s'", path);
1053                 g_free(path);
1054                 return ret;
1055         }
1056
1057         g_free(path);
1058         folder_item_remove(item);
1059         return 0;
1060 }
1061
1062 static MsgInfo *mh_parse_msg(const gchar *file, FolderItem *item)
1063 {
1064         MsgInfo *msginfo;
1065         MsgFlags flags;
1066
1067         cm_return_val_if_fail(item != NULL, NULL);
1068         cm_return_val_if_fail(file != NULL, NULL);
1069
1070         flags.perm_flags = MSG_NEW|MSG_UNREAD;
1071         flags.tmp_flags = 0;
1072
1073         if (folder_has_parent_of_type(item, F_QUEUE)) {
1074                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
1075         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
1076                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
1077         }
1078
1079         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
1080         if (!msginfo) return NULL;
1081
1082         msginfo->msgnum = atoi(file);
1083         msginfo->folder = item;
1084
1085         return msginfo;
1086 }
1087
1088 static gboolean mh_remove_missing_folder_items_func(GNode *node, gpointer data)
1089 {
1090         FolderItem *item;
1091         gchar *path;
1092
1093         cm_return_val_if_fail(node->data != NULL, FALSE);
1094
1095         if (G_NODE_IS_ROOT(node))
1096                 return FALSE;
1097
1098         item = FOLDER_ITEM(node->data);
1099
1100         path = folder_item_get_path(item);
1101         if (!is_dir_exist(path)) {
1102                 debug_print("folder '%s' not found. removing...\n", path?path:"(null)");
1103                 folder_item_remove(item);
1104         }
1105         g_free(path);
1106
1107         return FALSE;
1108 }
1109
1110 static void mh_remove_missing_folder_items(Folder *folder)
1111 {
1112         cm_return_if_fail(folder != NULL);
1113
1114         debug_print("searching missing folders...\n");
1115
1116         g_node_traverse(folder->node, G_POST_ORDER, G_TRAVERSE_ALL, -1,
1117                         mh_remove_missing_folder_items_func, folder);
1118 }
1119
1120 static void mh_scan_tree_recursive(FolderItem *item)
1121 {
1122         Folder *folder;
1123         GDir *dir;
1124         const gchar *dir_name;
1125         gchar *entry, *utf8entry, *utf8name, *path;
1126         gint n_msg = 0;
1127         GError *error = NULL;
1128
1129         cm_return_if_fail(item != NULL);
1130         cm_return_if_fail(item->folder != NULL);
1131
1132         folder = item->folder;
1133
1134         path = folder_item_get_path(item);
1135         debug_print("mh_scan_tree_recursive() opening '%s'\n", path);
1136         dir = g_dir_open(path, 0, &error);
1137         if (!dir) {
1138                 g_warning("failed to open directory '%s': %s (%d)",
1139                                 path, error->message, error->code);
1140                 g_error_free(error);
1141                 g_free(path);
1142                 return;
1143         }
1144
1145         debug_print("scanning %s ...\n",
1146                     item->path ? item->path
1147                     : LOCAL_FOLDER(item->folder)->rootpath);
1148         if (folder->ui_func)
1149                 folder->ui_func(folder, item, folder->ui_func_data);
1150
1151         while ((dir_name = g_dir_read_name(dir)) != NULL) {
1152                 if (dir_name[0] == '.') continue;
1153
1154                 entry = g_strconcat(path, G_DIR_SEPARATOR_S, dir_name, NULL);
1155
1156                 utf8name = mh_filename_to_utf8(dir_name);
1157                 if (item->path)
1158                         utf8entry = g_strconcat(item->path, G_DIR_SEPARATOR_S,
1159                                                 utf8name, NULL);
1160                 else
1161                         utf8entry = g_strdup(utf8name);
1162
1163                 if (g_file_test(entry, G_FILE_TEST_IS_DIR)) {
1164                         FolderItem *new_item = NULL;
1165                         GNode *node;
1166
1167                         node = item->node;
1168                         for (node = node->children; node != NULL; node = node->next) {
1169                                 FolderItem *cur_item = FOLDER_ITEM(node->data);
1170                                 gchar *curpath = folder_item_get_path(cur_item);
1171                                 if (!strcmp2(curpath, entry)) {
1172                                         new_item = cur_item;
1173                                         g_free(curpath);
1174                                         break;
1175                                 }
1176                                 g_free(curpath);
1177                         }
1178                         if (!new_item) {
1179                                 debug_print("new folder '%s' found.\n", entry);
1180                                 new_item = folder_item_new(folder, utf8name, utf8entry);
1181                                 folder_item_append(item, new_item);
1182                         }
1183
1184                         if (!item->path) {
1185                                 if (!folder->inbox &&
1186                                     !strcmp(dir_name, INBOX_DIR)) {
1187                                         new_item->stype = F_INBOX;
1188                                         folder->inbox = new_item;
1189                                 } else if (!folder->outbox &&
1190                                            !strcmp(dir_name, OUTBOX_DIR)) {
1191                                         new_item->stype = F_OUTBOX;
1192                                         folder->outbox = new_item;
1193                                 } else if (!folder->draft &&
1194                                            !strcmp(dir_name, DRAFT_DIR)) {
1195                                         new_item->stype = F_DRAFT;
1196                                         folder->draft = new_item;
1197                                 } else if (!folder->queue &&
1198                                            !strcmp(dir_name, QUEUE_DIR)) {
1199                                         new_item->stype = F_QUEUE;
1200                                         folder->queue = new_item;
1201                                 } else if (!folder->trash &&
1202                                            !strcmp(dir_name, TRASH_DIR)) {
1203                                         new_item->stype = F_TRASH;
1204                                         folder->trash = new_item;
1205                                 }
1206                         }
1207
1208                         mh_scan_tree_recursive(new_item);
1209                 } else if (to_number(dir_name) > 0) n_msg++;
1210
1211                 g_free(entry);
1212                 g_free(utf8entry);
1213                 g_free(utf8name);
1214         }
1215
1216         g_dir_close(dir);
1217         g_free(path);
1218
1219         mh_set_mtime(folder, item);
1220 }
1221
1222 static gboolean mh_rename_folder_func(GNode *node, gpointer data)
1223 {
1224         FolderItem *item = node->data;
1225         gchar **paths = data;
1226         const gchar *oldpath = paths[0];
1227         const gchar *newpath = paths[1];
1228         gchar *base;
1229         gchar *new_itempath;
1230         gint oldpathlen;
1231
1232         oldpathlen = strlen(oldpath);
1233         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
1234                 g_warning("path doesn't match: %s, %s", oldpath, item->path);
1235                 return TRUE;
1236         }
1237
1238         base = item->path + oldpathlen;
1239         while (*base == G_DIR_SEPARATOR) base++;
1240         if (*base == '\0')
1241                 new_itempath = g_strdup(newpath);
1242         else
1243                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
1244                                            NULL);
1245         g_free(item->path);
1246         item->path = new_itempath;
1247
1248         return FALSE;
1249 }
1250
1251 static gchar *mh_filename_from_utf8(const gchar *path)
1252 {
1253         gchar *real_path = g_filename_from_utf8(path, -1, NULL, NULL, NULL);
1254
1255         if (!real_path) {
1256                 g_warning("mh_filename_from_utf8: failed to convert character set");
1257                 real_path = g_strdup(path);
1258         }
1259
1260         return real_path;
1261 }
1262
1263 static gchar *mh_filename_to_utf8(const gchar *path)
1264 {
1265         gchar *utf8path = g_filename_to_utf8(path, -1, NULL, NULL, NULL);
1266         if (!utf8path) {
1267                 g_warning("mh_filename_to_utf8: failed to convert character set");
1268                 utf8path = g_strdup(path);
1269         }
1270
1271         return utf8path;
1272 }
1273
1274 static gint sort_cache_list_by_msgnum(gconstpointer a, gconstpointer b)
1275 {
1276         MsgInfo *msginfo_a = (MsgInfo *) a;
1277         MsgInfo *msginfo_b = (MsgInfo *) b;
1278
1279         return (msginfo_a->msgnum - msginfo_b->msgnum);
1280 }
1281
1282 static gchar *get_unseen_seq_name(void)
1283 {
1284         static gchar *seq_name = NULL;
1285         if (!seq_name) {
1286                 gchar buf[BUFFSIZE];
1287                 gchar *tmp;
1288                 gchar *profile_path = g_strconcat(
1289                         get_home_dir(), G_DIR_SEPARATOR_S,
1290                         ".mh_profile", NULL);
1291                 FILE *fp = g_fopen(profile_path, "r");
1292                 if (fp) {
1293                         while (fgets(buf, sizeof(buf), fp) != NULL) {
1294                                 if (!strncmp(buf, "Unseen-Sequence:", strlen("Unseen-Sequence:"))) {
1295                                         gchar *seq_tmp = buf+strlen("Unseen-Sequence:");
1296                                         while (*seq_tmp == ' ')
1297                                                 seq_tmp++;
1298                                         seq_name = g_strdup(seq_tmp);
1299                                         seq_name = strretchomp(seq_name);
1300                                         break;
1301                                 }
1302                         }
1303                         fclose(fp);
1304                 }
1305                 if (!seq_name)
1306                         seq_name = g_strdup("unseen");
1307                 tmp = g_strdup_printf("%s:", seq_name);
1308                 g_free(seq_name);
1309                 seq_name = tmp;
1310         }
1311         return seq_name;
1312 }
1313
1314 static void mh_write_sequences(FolderItem *item, gboolean remove_unseen)
1315 {
1316         gchar *mh_sequences_old, *mh_sequences_new;
1317         FILE *mh_sequences_old_fp, *mh_sequences_new_fp;
1318         gchar buf[BUFFSIZE];
1319         gchar *path = NULL;
1320         gboolean err = FALSE;
1321         START_TIMING("");
1322
1323         if (!item)
1324                 return;
1325
1326         path = folder_item_get_path(item);
1327
1328         mh_sequences_old = g_strconcat(path, G_DIR_SEPARATOR_S,
1329                                             ".mh_sequences", NULL);
1330         mh_sequences_new = g_strconcat(path, G_DIR_SEPARATOR_S,
1331                                             ".mh_sequences.new", NULL);
1332         if ((mh_sequences_new_fp = g_fopen(mh_sequences_new, "w+b")) != NULL) {
1333                 GSList *msglist = folder_item_get_msg_list(item);
1334                 GSList *cur;
1335                 MsgInfo *info = NULL;
1336                 gint start = -1, end = -1;
1337                 gchar *sequence = g_strdup("");
1338                 gint seq_len = 0;
1339                 msglist = g_slist_sort(msglist, sort_cache_list_by_msgnum);
1340                 cur = msglist;
1341
1342                 /* write the unseen sequence if we don't have to scrap it */
1343                 if (!remove_unseen) do {
1344                         info = (MsgInfo *)(cur ? cur->data:NULL);
1345                         if (info && (MSG_IS_UNREAD(info->flags) || MSG_IS_NEW(info->flags))) {
1346                                 if (start < 0)
1347                                         start = end = info->msgnum;
1348                                 else
1349                                         end = info->msgnum;
1350                         } else {
1351                                 if (start > 0 && end > 0) {
1352                                         gchar tmp[32];
1353                                         gint tmp_len = 0;
1354                                         if (start != end)
1355                                                 snprintf(tmp, 31, " %d-%d", start, end);
1356                                         else
1357                                                 snprintf(tmp, 31, " %d", start);
1358
1359                                         tmp_len = strlen(tmp);
1360                                         sequence = g_realloc(sequence, seq_len+tmp_len+1);
1361                                         strcpy(sequence+seq_len, tmp);
1362                                         seq_len += tmp_len;
1363
1364                                         start = end = -1;
1365                                 }
1366                         }
1367                         cur = cur ? cur->next:NULL;
1368                 } while (cur || (start > 0 && end > 0));
1369                 if (sequence && *sequence) {
1370                         if (fprintf(mh_sequences_new_fp, "%s%s\n",
1371                                         get_unseen_seq_name(), sequence) < 0)
1372                                 err = TRUE;
1373                         else
1374                                 debug_print("wrote unseen sequence: '%s%s'\n",
1375                                         get_unseen_seq_name(), sequence);
1376                 }
1377                 /* rewrite the rest of the file */
1378                 if ((mh_sequences_old_fp = g_fopen(mh_sequences_old, "r+b")) != NULL) {
1379                         while (fgets(buf, sizeof(buf), mh_sequences_old_fp) != NULL) {
1380                                 if (strncmp(buf, get_unseen_seq_name(), strlen(get_unseen_seq_name())))
1381                                         if (fprintf(mh_sequences_new_fp, "%s", buf) < 0) {
1382                                                 err = TRUE;
1383                                                 break;
1384                                         }
1385                         }
1386                         fclose(mh_sequences_old_fp);
1387                 }
1388
1389                 fflush(mh_sequences_new_fp);
1390 #if 0
1391                 fsync(fileno(mh_sequences_new_fp));
1392 #endif
1393                 if (fclose(mh_sequences_new_fp) == EOF)
1394                         err = TRUE;
1395
1396                 if (!err) {
1397                         if (g_rename(mh_sequences_new, mh_sequences_old) < 0)
1398                                 FILE_OP_ERROR(mh_sequences_new, "rename");
1399                 }
1400                 g_free(sequence);
1401                 procmsg_msg_list_free(msglist);
1402         }
1403         g_free(mh_sequences_old);
1404         g_free(mh_sequences_new);
1405         g_free(path);
1406
1407         END_TIMING();
1408 }
1409
1410 static int mh_item_close(Folder *folder, FolderItem *item)
1411 {
1412         time_t last_mtime = (time_t)0;
1413         gboolean need_scan = mh_scan_required(item->folder, item);
1414         last_mtime = item->mtime;
1415
1416         mh_write_sequences(item, FALSE);
1417
1418         if (item->mtime == last_mtime && !need_scan) {
1419                 mh_set_mtime(folder, item);
1420         }
1421
1422         return 0;
1423 }
1424
1425 static void mh_set_mtime(Folder *folder, FolderItem *item)
1426 {
1427         GStatBuf s;
1428         gchar *path = folder_item_get_path(item);
1429
1430         cm_return_if_fail(path != NULL);
1431
1432         if (g_stat(path, &s) < 0) {
1433                 FILE_OP_ERROR(path, "stat");
1434                 g_free(path);
1435                 return;
1436         }
1437
1438         item->mtime = s.st_mtime;
1439         debug_print("MH: forced mtime of %s to %ld\n", item->name?item->name:"(null)", item->mtime);
1440         g_free(path);
1441 }