src/mbox.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 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
  26 #define _GNU_SOURCE
  27 #include <stdio.h>
  28
  29 #include "defs.h"
  30 #include <glib.h>
  31 #include <glib/gi18n.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <string.h>
  35 #include <fcntl.h>
  36 #include <sys/file.h>
  37 #include <ctype.h>
  38 #include <time.h>
  39 #include <errno.h>
  40
  41 #ifdef G_OS_WIN32
  42 #  include <w32lib.h>
  43 #endif
  44
  45 #include "mbox.h"
  46 #include "procmsg.h"
  47 #include "folder.h"
  48 #include "prefs_common.h"
  49 #include "prefs_account.h"
  50 #include "account.h"
  51 #include "utils.h"
  52 #include "filtering.h"
  53 #include "alertpanel.h"
  54 #include "statusbar.h"
  55
  56 #define MSGBUFSIZE      8192
  57
  58 #ifdef HAVE_FGETS_UNLOCKED
  59 #define SC_FGETS fgets_unlocked
  60 #define SC_FPUTS fputs_unlocked
  61 #define SC_FPUTC fputc_unlocked
  62 #else
  63 #define SC_FGETS fgets
  64 #define SC_FPUTS fputs
  65 #define SC_FPUTC fputc
  66 #endif
  67
  68 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  69 { \
  70         lines++; \
  71         if (fputs(s, tmp_fp) == EOF) { \
  72                 g_warning("can't write to temporary file\n"); \
  73                 fclose(tmp_fp); \
  74                 fclose(mbox_fp); \
  75                 claws_unlink(tmp_file); \
  76                 g_free(tmp_file); \
  77                 return -1; \
  78         } \
  79 }
  80
  81 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
  82                PrefsAccount *account)
  83 /* return values: -1 error, >=0 number of msgs added */
  84 {
  85         FILE *mbox_fp;
  86         gchar buf[MSGBUFSIZE];
  87         gchar *tmp_file;
  88         gint msgs = 0;
  89         gint lines;
  90         MsgInfo *msginfo;
  91         gboolean more;
  92         GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
  93         gboolean printed = FALSE;
  94         FolderItem *dropfolder;
  95
  96         cm_return_val_if_fail(dest != NULL, -1);
  97         cm_return_val_if_fail(mbox != NULL, -1);
  98
  99         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
 100
 101         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
 102                 FILE_OP_ERROR(mbox, "fopen");
 103                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
 104                 return -1;
 105         }
 106
 107         /* ignore empty lines on the head */
 108         do {
 109                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 110                         g_warning("can't read mbox file.\n");
 111                         fclose(mbox_fp);
 112                         return -1;
 113                 }
 114         } while (buf[0] == '\n' || buf[0] == '\r');
 115
 116         if (strncmp(buf, "From ", 5) != 0) {
 117                 g_warning("invalid mbox format: %s\n", mbox);
 118                 fclose(mbox_fp);
 119                 return -1;
 120         }
 121
 122         tmp_file = get_tmp_file();
 123
 124         folder_item_update_freeze();
 125
 126         if (apply_filter)
 127                 dropfolder = folder_get_default_processing();
 128         else
 129                 dropfolder = dest;
 130
 131         do {
 132                 FILE *tmp_fp;
 133                 gint empty_lines;
 134                 gint msgnum;
 135
 136                 if (msgs > 0 && msgs%500 == 0) {
 137                         if (printed)
 138                                 statusbar_pop_all();
 139                         statusbar_print_all(_("Importing from mbox... (%d mails imported)"), msgs);
 140                         printed=TRUE;
 141                         GTK_EVENTS_FLUSH();
 142                 }
 143
 144                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 145                         FILE_OP_ERROR(tmp_file, "fopen");
 146                         g_warning("can't open temporary file\n");
 147                         fclose(mbox_fp);
 148                         g_free(tmp_file);
 149                         return -1;
 150                 }
 151                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 152                         FILE_OP_ERROR(tmp_file, "chmod");
 153                 }
 154
 155                 empty_lines = 0;
 156                 lines = 0;
 157
 158                 /* process all lines from mboxrc file */
 159                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 160                         int offset;
 161
 162                         /* eat empty lines */
 163                         if (buf[0] == '\n' || buf[0] == '\r') {
 164                                 empty_lines++;
 165                                 continue;
 166                         }
 167
 168                         /* From separator or quoted From */
 169                         offset = 0;
 170                         /* detect leading '>' char(s) */
 171                         while ((buf[offset] == '>')) {
 172                                 offset++;
 173                         }
 174                         if (!strncmp(buf+offset, "From ", 5)) {
 175                                 /* From separator: */
 176                                 if (offset == 0) {
 177                                         /* expect next mbox item */
 178                                         break;
 179                                 }
 180
 181                                 /* quoted From: */
 182                                 /* flush any eaten empty line */
 183                                 if (empty_lines > 0) {
 184                                         while (empty_lines-- > 0) {
 185                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 186                                 }
 187                                         empty_lines = 0;
 188                                 }
 189                                 /* store the unquoted line */
 190                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 191                                 continue;
 192                         }
 193
 194                         /* other line */
 195                         /* flush any eaten empty line */
 196                         if (empty_lines > 0) {
 197                                 while (empty_lines-- > 0) {
 198                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 199                         }
 200                                 empty_lines = 0;
 201                         }
 202                         /* store the line itself */
 203                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 204                 }
 205                 /* end of mbox item or end of mbox */
 206
 207                 /* flush any eaten empty line (but the last one) */
 208                 if (empty_lines > 0) {
 209                         while (--empty_lines > 0) {
 210                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 211                         }
 212                 }
 213
 214                 /* more emails to expect? */
 215                 more = !feof(mbox_fp);
 216
 217                 /* warn if email part is empty (it's the minimum check
 218                    we can do */
 219                 if (lines == 0) {
 220                         g_warning("malformed mbox: %s: message %d is empty\n", mbox, msgs);
 221                         fclose(tmp_fp);
 222                         fclose(mbox_fp);
 223                         claws_unlink(tmp_file);
 224                         return -1;
 225                 }
 226
 227                 if (fclose(tmp_fp) == EOF) {
 228                         FILE_OP_ERROR(tmp_file, "fclose");
 229                         g_warning("can't write to temporary file\n");
 230                         fclose(mbox_fp);
 231                         claws_unlink(tmp_file);
 232                         g_free(tmp_file);
 233                         return -1;
 234                 }
 235
 236                 if (apply_filter) {
 237                         if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 238                                 fclose(mbox_fp);
 239                                 claws_unlink(tmp_file);
 240                                 g_free(tmp_file);
 241                                 return -1;
 242                         }
 243                         msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 244                         to_filter = g_slist_prepend(to_filter, msginfo);
 245                 } else {
 246                         MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
 247                         finfo->file = tmp_file;
 248
 249                         to_add = g_slist_prepend(to_add, finfo);
 250                         tmp_file = get_tmp_file();
 251
 252                         /* flush every 500 */
 253                         if (msgs > 0 && msgs % 500 == 0) {
 254                                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 255                                 procmsg_message_file_list_free(to_add);
 256                                 to_add = NULL;
 257                         }
 258                 }
 259                 msgs++;
 260         } while (more);
 261
 262         if (printed)
 263                 statusbar_pop_all();
 264
 265         if (apply_filter) {
 266
 267                 folder_item_set_batch(dropfolder, FALSE);
 268                 procmsg_msglist_filter(to_filter, account,
 269                                 &filtered, &unfiltered, TRUE);
 270                 folder_item_set_batch(dropfolder, TRUE);
 271
 272                 filtering_move_and_copy_msgs(to_filter);
 273                 for (cur = filtered; cur; cur = g_slist_next(cur)) {
 274                         MsgInfo *info = (MsgInfo *)cur->data;
 275                         procmsg_msginfo_free(info);
 276                 }
 277
 278                 unfiltered = g_slist_reverse(unfiltered);
 279                 if (unfiltered) {
 280                         folder_item_move_msgs(dest, unfiltered);
 281                         for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
 282                                 MsgInfo *info = (MsgInfo *)cur->data;
 283                                 procmsg_msginfo_free(info);
 284                         }
 285                 }
 286
 287                 g_slist_free(unfiltered);
 288                 g_slist_free(filtered);
 289                 g_slist_free(to_filter);
 290         } else if (to_add) {
 291                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 292                 procmsg_message_file_list_free(to_add);
 293                 to_add = NULL;
 294         }
 295
 296         folder_item_update_thaw();
 297
 298         g_free(tmp_file);
 299         fclose(mbox_fp);
 300         debug_print("%d messages found.\n", msgs);
 301
 302         return msgs;
 303 }
 304
 305 gint lock_mbox(const gchar *base, LockType type)
 306 {
 307 #ifdef G_OS_UNIX
 308         gint retval = 0;
 309
 310         if (type == LOCK_FILE) {
 311                 gchar *lockfile, *locklink;
 312                 gint retry = 0;
 313                 FILE *lockfp;
 314
 315                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 316                 if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
 317                         FILE_OP_ERROR(lockfile, "fopen");
 318                         g_warning("can't create lock file %s\n", lockfile);
 319                         g_warning("use 'flock' instead of 'file' if possible.\n");
 320                         g_free(lockfile);
 321                         return -1;
 322                 }
 323
 324                 if (fprintf(lockfp, "%d\n", getpid()) < 0) {
 325                         FILE_OP_ERROR(lockfile, "fprintf");
 326                         g_free(lockfile);
 327                         fclose(lockfp);
 328                         return -1;
 329                 }
 330
 331                 if (fclose(lockfp) == EOF) {
 332                         FILE_OP_ERROR(lockfile, "fclose");
 333                         g_free(lockfile);
 334                         return -1;
 335                 }
 336
 337                 locklink = g_strconcat(base, ".lock", NULL);
 338                 while (link(lockfile, locklink) < 0) {
 339                         FILE_OP_ERROR(lockfile, "link");
 340                         if (retry >= 5) {
 341                                 g_warning("can't create %s\n", lockfile);
 342                                 claws_unlink(lockfile);
 343                                 g_free(lockfile);
 344                                 return -1;
 345                         }
 346                         if (retry == 0)
 347                                 g_warning("mailbox is owned by another"
 348                                             " process, waiting...\n");
 349                         retry++;
 350                         sleep(5);
 351                 }
 352                 claws_unlink(lockfile);
 353                 g_free(lockfile);
 354         } else if (type == LOCK_FLOCK) {
 355                 gint lockfd;
 356                 gboolean fcntled = FALSE;
 357 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 358                 struct flock fl;
 359                 fl.l_type = F_WRLCK;
 360                 fl.l_whence = SEEK_SET;
 361                 fl.l_start = 0;
 362                 fl.l_len = 0;
 363 #endif
 364
 365 #if HAVE_FLOCK
 366                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 367 #else
 368                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 369 #endif
 370                         FILE_OP_ERROR(base, "open");
 371                         return -1;
 372                 }
 373
 374 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 375                 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
 376                         g_warning("can't fnctl %s (%s)", base, strerror(errno));
 377                         return -1;
 378                 } else {
 379                         fcntled = TRUE;
 380                 }
 381 #endif
 382
 383 #if HAVE_FLOCK
 384                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
 385                         perror("flock");
 386 #else
 387 #if HAVE_LOCKF
 388                 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
 389                         perror("lockf");
 390 #else
 391                 {
 392 #endif
 393 #endif /* HAVE_FLOCK */
 394                         g_warning("can't lock %s\n", base);
 395                         if (close(lockfd) < 0)
 396                                 perror("close");
 397                         return -1;
 398                 }
 399                 retval = lockfd;
 400         } else {
 401                 g_warning("invalid lock type\n");
 402                 return -1;
 403         }
 404
 405         return retval;
 406 #else
 407         return -1;
 408 #endif /* G_OS_UNIX */
 409 }
 410
 411 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 412 {
 413         if (type == LOCK_FILE) {
 414                 gchar *lockfile;
 415
 416                 lockfile = g_strconcat(base, ".lock", NULL);
 417                 if (claws_unlink(lockfile) < 0) {
 418                         FILE_OP_ERROR(lockfile, "unlink");
 419                         g_free(lockfile);
 420                         return -1;
 421                 }
 422                 g_free(lockfile);
 423
 424                 return 0;
 425         } else if (type == LOCK_FLOCK) {
 426                 gboolean fcntled = FALSE;
 427 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 428                 struct flock fl;
 429                 fl.l_type = F_UNLCK;
 430                 fl.l_whence = SEEK_SET;
 431                 fl.l_start = 0;
 432                 fl.l_len = 0;
 433
 434                 if (fcntl(fd, F_SETLK, &fl) == -1) {
 435                         g_warning("can't fnctl %s", base);
 436                 } else {
 437                         fcntled = TRUE;
 438                 }
 439 #endif
 440 #if HAVE_FLOCK
 441                 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
 442                         perror("flock");
 443 #else
 444 #if HAVE_LOCKF
 445                 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
 446                         perror("lockf");
 447 #else
 448                 {
 449 #endif
 450 #endif /* HAVE_FLOCK */
 451                         g_warning("can't unlock %s\n", base);
 452                         if (close(fd) < 0)
 453                                 perror("close");
 454                         return -1;
 455                 }
 456
 457                 if (close(fd) < 0) {
 458                         perror("close");
 459                         return -1;
 460                 }
 461
 462                 return 0;
 463         }
 464
 465         g_warning("invalid lock type\n");
 466         return -1;
 467 }
 468
 469 gint copy_mbox(gint srcfd, const gchar *dest)
 470 {
 471         FILE *dest_fp;
 472         ssize_t n_read;
 473         gchar buf[BUFSIZ];
 474         gboolean err = FALSE;
 475         int save_errno = 0;
 476
 477         if (srcfd < 0) {
 478                 return -1;
 479         }
 480
 481         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
 482                 FILE_OP_ERROR(dest, "fopen");
 483                 return -1;
 484         }
 485
 486         if (change_file_mode_rw(dest_fp, dest) < 0) {
 487                 FILE_OP_ERROR(dest, "chmod");
 488                 g_warning("can't change file mode\n");
 489         }
 490
 491         while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
 492                 if (n_read == -1 && errno != 0) {
 493                         save_errno = errno;
 494                         break;
 495                 }
 496                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
 497                         g_warning("writing to %s failed.\n", dest);
 498                         fclose(dest_fp);
 499                         claws_unlink(dest);
 500                         return -1;
 501                 }
 502         }
 503
 504         if (save_errno != 0) {
 505                 g_warning("error %d reading mbox: %s\n", save_errno,
 506                                 strerror(save_errno));
 507                 err = TRUE;
 508         }
 509
 510         if (fclose(dest_fp) == EOF) {
 511                 FILE_OP_ERROR(dest, "fclose");
 512                 err = TRUE;
 513         }
 514
 515         if (err) {
 516                 claws_unlink(dest);
 517                 return -1;
 518         }
 519
 520         return 0;
 521 }
 522
 523 void empty_mbox(const gchar *mbox)
 524 {
 525         FILE *fp;
 526
 527         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 528                 FILE_OP_ERROR(mbox, "fopen");
 529                 g_warning("can't truncate mailbox to zero.\n");
 530                 return;
 531         }
 532         fclose(fp);
 533 }
 534
 535 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 536 /* return values: -2 skipped, -1 error, 0 OK */
 537 {
 538         GSList *cur;
 539         MsgInfo *msginfo;
 540         FILE *msg_fp;
 541         FILE *mbox_fp;
 542         gchar buf[BUFFSIZE];
 543         int err = 0;
 544
 545         gint msgs = 1, total = g_slist_length(mlist);
 546         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 547                 if (alertpanel_full(_("Overwrite mbox file"),
 548                                         _("This file already exists. Do you want to overwrite it?"),
 549                                         GTK_STOCK_CANCEL, _("Overwrite"), NULL, FALSE,
 550                                         NULL, ALERT_WARNING, G_ALERTDEFAULT)
 551                                 != G_ALERTALTERNATE) {
 552                         return -2;
 553                 }
 554         }
 555
 556         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 557                 FILE_OP_ERROR(mbox, "fopen");
 558                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 559                 return -1;
 560         }
 561
 562 #ifdef HAVE_FGETS_UNLOCKED
 563         flockfile(mbox_fp);
 564 #endif
 565
 566         statuswindow_print_all(_("Exporting to mbox..."));
 567         for (cur = mlist; cur != NULL; cur = cur->next) {
 568                 int len;
 569                 gchar buft[BUFFSIZE];
 570                 msginfo = (MsgInfo *)cur->data;
 571
 572                 msg_fp = procmsg_open_message(msginfo);
 573                 if (!msg_fp) {
 574                         continue;
 575                 }
 576
 577 #ifdef HAVE_FGETS_UNLOCKED
 578                 flockfile(msg_fp);
 579 #endif
 580                 strncpy2(buf,
 581                          msginfo->from ? msginfo->from :
 582                          cur_account && cur_account->address ?
 583                          cur_account->address : "unknown",
 584                          sizeof(buf));
 585                 extract_address(buf);
 586
 587                 if (fprintf(mbox_fp, "From %s %s",
 588                         buf, ctime_r(&msginfo->date_t, buft)) < 0) {
 589                         err = -1;
 590 #ifdef HAVE_FGETS_UNLOCKED
 591                         funlockfile(msg_fp);
 592 #endif
 593                         fclose(msg_fp);
 594                         goto out;
 595                 }
 596
 597                 buf[0] = '\0';
 598
 599                 /* write email to mboxrc */
 600                 while (SC_FGETS(buf, sizeof(buf), msg_fp) != NULL) {
 601                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 602                         int offset;
 603
 604                         offset = 0;
 605                         /* detect leading '>' char(s) */
 606                         while ((buf[offset] == '>')) {
 607                                 offset++;
 608                         }
 609                         if (!strncmp(buf+offset, "From ", 5)) {
 610                                 if (SC_FPUTC('>', mbox_fp) == EOF) {
 611                                         err = -1;
 612 #ifdef HAVE_FGETS_UNLOCKED
 613                                         funlockfile(msg_fp);
 614 #endif
 615                                         fclose(msg_fp);
 616                                         goto out;
 617                                 }
 618                         }
 619                         if (SC_FPUTS(buf, mbox_fp) == EOF) {
 620                                 err = -1;
 621 #ifdef HAVE_FGETS_UNLOCKED
 622                                 funlockfile(msg_fp);
 623 #endif
 624                                 fclose(msg_fp);
 625                                 goto out;
 626                         }
 627                 }
 628
 629                 /* force last line to end w/ a newline */
 630                 len = strlen(buf);
 631                 if (len > 0) {
 632                         len--;
 633                         if ((buf[len] != '\n') && (buf[len] != '\r')) {
 634                                 if (SC_FPUTC('\n', mbox_fp) == EOF) {
 635                                         err = -1;
 636 #ifdef HAVE_FGETS_UNLOCKED
 637                                         funlockfile(msg_fp);
 638 #endif
 639                                         fclose(msg_fp);
 640                                         goto out;
 641                                 }
 642                         }
 643                 }
 644
 645                 /* add a trailing empty line */
 646                 if (SC_FPUTC('\n', mbox_fp) == EOF) {
 647                         err = -1;
 648 #ifdef HAVE_FGETS_UNLOCKED
 649                         funlockfile(msg_fp);
 650 #endif
 651                         fclose(msg_fp);
 652                         goto out;
 653                 }
 654
 655 #ifdef HAVE_FGETS_UNLOCKED
 656                 funlockfile(msg_fp);
 657 #endif
 658                 fclose(msg_fp);
 659                 statusbar_progress_all(msgs++,total, 500);
 660                 if (msgs%500 == 0)
 661                         GTK_EVENTS_FLUSH();
 662         }
 663
 664 out:
 665         statusbar_progress_all(0,0,0);
 666         statuswindow_pop_all();
 667
 668 #ifdef HAVE_FGETS_UNLOCKED
 669         funlockfile(mbox_fp);
 670 #endif
 671         fclose(mbox_fp);
 672
 673         return err;
 674 }
 675
 676 /* read all messages in SRC, and store them into one MBOX file. */
 677 /* return values: -2 skipped, -1 error, 0 OK */
 678 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 679 {
 680         GSList *mlist;
 681         gint ret;
 682
 683         cm_return_val_if_fail(src != NULL, -1);
 684         cm_return_val_if_fail(src->folder != NULL, -1);
 685         cm_return_val_if_fail(mbox != NULL, -1);
 686
 687         debug_print("Exporting messages from %s into %s...\n",
 688                     src->path, mbox);
 689
 690         mlist = folder_item_get_msg_list(src);
 691
 692         folder_item_update_freeze();
 693         ret = export_list_to_mbox(mlist, mbox);
 694         folder_item_update_thaw();
 695
 696         procmsg_msg_list_free(mlist);
 697
 698         return ret;
 699 }