src/mbox.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2015 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 #ifdef USE_PTHREAD
  30 #include <pthread.h>
  31 #endif
  32
  33 #include "defs.h"
  34 #include <glib.h>
  35 #include <glib/gi18n.h>
  36 #include <stdlib.h>
  37 #include <unistd.h>
  38 #include <string.h>
  39 #include <fcntl.h>
  40 #include <sys/file.h>
  41 #include <ctype.h>
  42 #include <time.h>
  43 #include <errno.h>
  44
  45 #ifdef G_OS_WIN32
  46 #  include <w32lib.h>
  47 #endif
  48
  49 #include "mbox.h"
  50 #include "procmsg.h"
  51 #include "folder.h"
  52 #include "prefs_common.h"
  53 #include "prefs_account.h"
  54 #include "account.h"
  55 #include "utils.h"
  56 #include "filtering.h"
  57 #include "alertpanel.h"
  58 #include "statusbar.h"
  59
  60 #define MESSAGEBUFSIZE  8192
  61
  62 #ifdef HAVE_FGETS_UNLOCKED
  63 #define SC_FGETS fgets_unlocked
  64 #define SC_FPUTS fputs_unlocked
  65 #define SC_FPUTC fputc_unlocked
  66 #else
  67 #define SC_FGETS fgets
  68 #define SC_FPUTS fputs
  69 #define SC_FPUTC fputc
  70 #endif
  71
  72 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  73 { \
  74         lines++; \
  75         if (fputs(s, tmp_fp) == EOF) { \
  76                 g_warning("can't write to temporary file"); \
  77                 fclose(tmp_fp); \
  78                 fclose(mbox_fp); \
  79                 claws_unlink(tmp_file); \
  80                 g_free(tmp_file); \
  81                 return -1; \
  82         } \
  83 }
  84
  85 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
  86                PrefsAccount *account)
  87 /* return values: -1 error, >=0 number of msgs added */
  88 {
  89         FILE *mbox_fp;
  90         gchar buf[MESSAGEBUFSIZE];
  91         gchar *tmp_file;
  92         gint msgs = 0;
  93         gint lines;
  94         MsgInfo *msginfo;
  95         gboolean more;
  96         GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
  97         gboolean printed = FALSE;
  98         FolderItem *dropfolder;
  99
 100         cm_return_val_if_fail(dest != NULL, -1);
 101         cm_return_val_if_fail(mbox != NULL, -1);
 102
 103         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
 104
 105         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
 106                 FILE_OP_ERROR(mbox, "fopen");
 107                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
 108                 return -1;
 109         }
 110
 111         /* ignore empty lines on the head */
 112         do {
 113                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 114                         g_warning("can't read mbox file.");
 115                         fclose(mbox_fp);
 116                         return -1;
 117                 }
 118         } while (buf[0] == '\n' || buf[0] == '\r');
 119
 120         if (strncmp(buf, "From ", 5) != 0) {
 121                 g_warning("invalid mbox format: %s", mbox);
 122                 fclose(mbox_fp);
 123                 return -1;
 124         }
 125
 126         tmp_file = get_tmp_file();
 127
 128         folder_item_update_freeze();
 129
 130         if (apply_filter)
 131                 dropfolder = folder_get_default_processing(account->account_id);
 132         else
 133                 dropfolder = dest;
 134
 135         do {
 136                 FILE *tmp_fp;
 137                 gint empty_lines;
 138                 gint msgnum;
 139
 140                 if (msgs > 0 && msgs%500 == 0) {
 141                         if (printed)
 142                                 statusbar_pop_all();
 143                         statusbar_print_all(
 144                                         ngettext("Importing from mbox... (%d mail imported)",
 145                                                 "Importing from mbox... (%d mails imported)", msgs), msgs);
 146                         printed=TRUE;
 147                         GTK_EVENTS_FLUSH();
 148                 }
 149
 150                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 151                         FILE_OP_ERROR(tmp_file, "fopen");
 152                         g_warning("can't open temporary file");
 153                         fclose(mbox_fp);
 154                         g_free(tmp_file);
 155                         return -1;
 156                 }
 157                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 158                         FILE_OP_ERROR(tmp_file, "chmod");
 159                 }
 160
 161                 empty_lines = 0;
 162                 lines = 0;
 163
 164                 /* process all lines from mboxrc file */
 165                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 166                         int offset;
 167
 168                         /* eat empty lines */
 169                         if (buf[0] == '\n' || buf[0] == '\r') {
 170                                 empty_lines++;
 171                                 continue;
 172                         }
 173
 174                         /* From separator or quoted From */
 175                         offset = 0;
 176                         /* detect leading '>' char(s) */
 177                         while ((buf[offset] == '>')) {
 178                                 offset++;
 179                         }
 180                         if (!strncmp(buf+offset, "From ", 5)) {
 181                                 /* From separator: */
 182                                 if (offset == 0) {
 183                                         /* expect next mbox item */
 184                                         break;
 185                                 }
 186
 187                                 /* quoted From: */
 188                                 /* flush any eaten empty line */
 189                                 if (empty_lines > 0) {
 190                                         while (empty_lines-- > 0) {
 191                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 192                                 }
 193                                         empty_lines = 0;
 194                                 }
 195                                 /* store the unquoted line */
 196                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 197                                 continue;
 198                         }
 199
 200                         /* other line */
 201                         /* flush any eaten empty line */
 202                         if (empty_lines > 0) {
 203                                 while (empty_lines-- > 0) {
 204                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 205                         }
 206                                 empty_lines = 0;
 207                         }
 208                         /* store the line itself */
 209                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 210                 }
 211                 /* end of mbox item or end of mbox */
 212
 213                 /* flush any eaten empty line (but the last one) */
 214                 if (empty_lines > 0) {
 215                         while (--empty_lines > 0) {
 216                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 217                         }
 218                 }
 219
 220                 /* more emails to expect? */
 221                 more = !feof(mbox_fp);
 222
 223                 /* warn if email part is empty (it's the minimum check
 224                    we can do */
 225                 if (lines == 0) {
 226                         g_warning("malformed mbox: %s: message %d is empty", mbox, msgs);
 227                         fclose(tmp_fp);
 228                         fclose(mbox_fp);
 229                         claws_unlink(tmp_file);
 230                         return -1;
 231                 }
 232
 233                 if (fclose(tmp_fp) == EOF) {
 234                         FILE_OP_ERROR(tmp_file, "fclose");
 235                         g_warning("can't write to temporary file");
 236                         fclose(mbox_fp);
 237                         claws_unlink(tmp_file);
 238                         g_free(tmp_file);
 239                         return -1;
 240                 }
 241
 242                 if (apply_filter) {
 243                         if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 244                                 fclose(mbox_fp);
 245                                 claws_unlink(tmp_file);
 246                                 g_free(tmp_file);
 247                                 return -1;
 248                         }
 249                         msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 250                         to_filter = g_slist_prepend(to_filter, msginfo);
 251                 } else {
 252                         MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
 253                         finfo->file = tmp_file;
 254
 255                         to_add = g_slist_prepend(to_add, finfo);
 256                         tmp_file = get_tmp_file();
 257
 258                         /* flush every 500 */
 259                         if (msgs > 0 && msgs % 500 == 0) {
 260                                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 261                                 procmsg_message_file_list_free(to_add);
 262                                 to_add = NULL;
 263                         }
 264                 }
 265                 msgs++;
 266         } while (more);
 267
 268         if (printed)
 269                 statusbar_pop_all();
 270
 271         if (apply_filter) {
 272
 273                 folder_item_set_batch(dropfolder, FALSE);
 274                 procmsg_msglist_filter(to_filter, account,
 275                                 &filtered, &unfiltered, TRUE);
 276                 folder_item_set_batch(dropfolder, TRUE);
 277
 278                 filtering_move_and_copy_msgs(to_filter);
 279                 for (cur = filtered; cur; cur = g_slist_next(cur)) {
 280                         MsgInfo *info = (MsgInfo *)cur->data;
 281                         procmsg_msginfo_free(&info);
 282                 }
 283
 284                 unfiltered = g_slist_reverse(unfiltered);
 285                 if (unfiltered) {
 286                         folder_item_move_msgs(dest, unfiltered);
 287                         for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
 288                                 MsgInfo *info = (MsgInfo *)cur->data;
 289                                 procmsg_msginfo_free(&info);
 290                         }
 291                 }
 292
 293                 g_slist_free(unfiltered);
 294                 g_slist_free(filtered);
 295                 g_slist_free(to_filter);
 296         } else if (to_add) {
 297                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 298                 procmsg_message_file_list_free(to_add);
 299                 to_add = NULL;
 300         }
 301
 302         folder_item_update_thaw();
 303
 304         g_free(tmp_file);
 305         fclose(mbox_fp);
 306         debug_print("%d messages found.\n", msgs);
 307
 308         return msgs;
 309 }
 310
 311 gint lock_mbox(const gchar *base, LockType type)
 312 {
 313 #ifdef G_OS_UNIX
 314         gint retval = 0;
 315
 316         if (type == LOCK_FILE) {
 317                 gchar *lockfile, *locklink;
 318                 gint retry = 0;
 319                 FILE *lockfp;
 320
 321                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 322                 if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
 323                         FILE_OP_ERROR(lockfile, "fopen");
 324                         g_warning("can't create lock file '%s', use 'flock' instead of 'file' if possible.", lockfile);
 325                         g_free(lockfile);
 326                         return -1;
 327                 }
 328
 329                 if (fprintf(lockfp, "%d\n", getpid()) < 0) {
 330                         FILE_OP_ERROR(lockfile, "fprintf");
 331                         g_free(lockfile);
 332                         fclose(lockfp);
 333                         return -1;
 334                 }
 335
 336                 if (fclose(lockfp) == EOF) {
 337                         FILE_OP_ERROR(lockfile, "fclose");
 338                         g_free(lockfile);
 339                         return -1;
 340                 }
 341
 342                 locklink = g_strconcat(base, ".lock", NULL);
 343                 while (link(lockfile, locklink) < 0) {
 344                         FILE_OP_ERROR(lockfile, "link");
 345                         if (retry >= 5) {
 346                                 g_warning("can't create '%s'", lockfile);
 347                                 claws_unlink(lockfile);
 348                                 g_free(lockfile);
 349                                 return -1;
 350                         }
 351                         if (retry == 0)
 352                                 g_warning("mailbox is owned by another"
 353                                           " process, waiting...");
 354                         retry++;
 355                         sleep(5);
 356                 }
 357                 claws_unlink(lockfile);
 358                 g_free(lockfile);
 359         } else if (type == LOCK_FLOCK) {
 360                 gint lockfd;
 361                 gboolean fcntled = FALSE;
 362 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 363                 struct flock fl;
 364                 fl.l_type = F_WRLCK;
 365                 fl.l_whence = SEEK_SET;
 366                 fl.l_start = 0;
 367                 fl.l_len = 0;
 368 #endif
 369
 370 #if HAVE_FLOCK
 371                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 372 #else
 373                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 374 #endif
 375                         FILE_OP_ERROR(base, "open");
 376                         return -1;
 377                 }
 378
 379 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 380                 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
 381                         g_warning("can't fnctl %s (%s)", base, g_strerror(errno));
 382                         close(lockfd);
 383                         return -1;
 384                 } else {
 385                         fcntled = TRUE;
 386                 }
 387 #endif
 388
 389 #if HAVE_FLOCK
 390                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
 391                         perror("flock");
 392 #else
 393 #if HAVE_LOCKF
 394                 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
 395                         perror("lockf");
 396 #else
 397                 {
 398 #endif
 399 #endif /* HAVE_FLOCK */
 400                         g_warning("can't lock %s", base);
 401                         if (close(lockfd) < 0)
 402                                 perror("close");
 403                         return -1;
 404                 }
 405                 retval = lockfd;
 406         } else {
 407                 g_warning("invalid lock type");
 408                 return -1;
 409         }
 410
 411         return retval;
 412 #else
 413         return -1;
 414 #endif /* G_OS_UNIX */
 415 }
 416
 417 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 418 {
 419         if (type == LOCK_FILE) {
 420                 gchar *lockfile;
 421
 422                 lockfile = g_strconcat(base, ".lock", NULL);
 423                 if (claws_unlink(lockfile) < 0) {
 424                         FILE_OP_ERROR(lockfile, "unlink");
 425                         g_free(lockfile);
 426                         return -1;
 427                 }
 428                 g_free(lockfile);
 429
 430                 return 0;
 431         } else if (type == LOCK_FLOCK) {
 432 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 433                 gboolean fcntled = FALSE;
 434                 struct flock fl;
 435                 fl.l_type = F_UNLCK;
 436                 fl.l_whence = SEEK_SET;
 437                 fl.l_start = 0;
 438                 fl.l_len = 0;
 439
 440                 if (fcntl(fd, F_SETLK, &fl) == -1) {
 441                         g_warning("can't fnctl %s", base);
 442                 } else {
 443                         fcntled = TRUE;
 444                 }
 445 #endif
 446 #if HAVE_FLOCK
 447                 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
 448                         perror("flock");
 449 #else
 450 #if HAVE_LOCKF
 451                 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
 452                         perror("lockf");
 453 #else
 454                 {
 455 #endif
 456 #endif /* HAVE_FLOCK */
 457                         g_warning("can't unlock %s", base);
 458                         if (close(fd) < 0)
 459                                 perror("close");
 460                         return -1;
 461                 }
 462
 463                 if (close(fd) < 0) {
 464                         perror("close");
 465                         return -1;
 466                 }
 467
 468                 return 0;
 469         }
 470
 471         g_warning("invalid lock type");
 472         return -1;
 473 }
 474
 475 gint copy_mbox(gint srcfd, const gchar *dest)
 476 {
 477         FILE *dest_fp;
 478         ssize_t n_read;
 479         gchar buf[BUFSIZ];
 480         gboolean err = FALSE;
 481         int save_errno = 0;
 482
 483         if (srcfd < 0) {
 484                 return -1;
 485         }
 486
 487         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
 488                 FILE_OP_ERROR(dest, "fopen");
 489                 return -1;
 490         }
 491
 492         if (change_file_mode_rw(dest_fp, dest) < 0) {
 493                 FILE_OP_ERROR(dest, "chmod");
 494                 g_warning("can't change file mode");
 495         }
 496
 497         while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
 498                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
 499                         g_warning("writing to %s failed.", dest);
 500                         fclose(dest_fp);
 501                         claws_unlink(dest);
 502                         return -1;
 503                 }
 504         }
 505
 506         if (save_errno != 0) {
 507                 g_warning("error %d reading mbox: %s", save_errno,
 508                                 g_strerror(save_errno));
 509                 err = TRUE;
 510         }
 511
 512         if (fclose(dest_fp) == EOF) {
 513                 FILE_OP_ERROR(dest, "fclose");
 514                 err = TRUE;
 515         }
 516
 517         if (err) {
 518                 claws_unlink(dest);
 519                 return -1;
 520         }
 521
 522         return 0;
 523 }
 524
 525 void empty_mbox(const gchar *mbox)
 526 {
 527         FILE *fp;
 528
 529         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 530                 FILE_OP_ERROR(mbox, "fopen");
 531                 g_warning("can't truncate mailbox to zero.");
 532                 return;
 533         }
 534         fclose(fp);
 535 }
 536
 537 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 538 /* return values: -2 skipped, -1 error, 0 OK */
 539 {
 540         GSList *cur;
 541         MsgInfo *msginfo;
 542         FILE *msg_fp;
 543         FILE *mbox_fp;
 544         gchar buf[BUFFSIZE];
 545         int err = 0;
 546
 547         gint msgs = 1, total = g_slist_length(mlist);
 548         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 549                 if (alertpanel_full(_("Overwrite mbox file"),
 550                                         _("This file already exists. Do you want to overwrite it?"),
 551                                         GTK_STOCK_CANCEL, _("Overwrite"), NULL, FALSE,
 552                                         NULL, ALERT_WARNING, G_ALERTDEFAULT)
 553                                 != G_ALERTALTERNATE) {
 554                         return -2;
 555                 }
 556         }
 557
 558         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 559                 FILE_OP_ERROR(mbox, "fopen");
 560                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 561                 return -1;
 562         }
 563
 564 #ifdef HAVE_FGETS_UNLOCKED
 565         flockfile(mbox_fp);
 566 #endif
 567
 568         statuswindow_print_all(_("Exporting to mbox..."));
 569         for (cur = mlist; cur != NULL; cur = cur->next) {
 570                 int len;
 571                 gchar buft[BUFFSIZE];
 572                 msginfo = (MsgInfo *)cur->data;
 573
 574                 msg_fp = procmsg_open_message(msginfo);
 575                 if (!msg_fp) {
 576                         continue;
 577                 }
 578
 579 #ifdef HAVE_FGETS_UNLOCKED
 580                 flockfile(msg_fp);
 581 #endif
 582                 strncpy2(buf,
 583                          msginfo->from ? msginfo->from :
 584                          cur_account && cur_account->address ?
 585                          cur_account->address : "unknown",
 586                          sizeof(buf));
 587                 extract_address(buf);
 588
 589                 if (fprintf(mbox_fp, "From %s %s",
 590                         buf, ctime_r(&msginfo->date_t, buft)) < 0) {
 591                         err = -1;
 592 #ifdef HAVE_FGETS_UNLOCKED
 593                         funlockfile(msg_fp);
 594 #endif
 595                         fclose(msg_fp);
 596                         goto out;
 597                 }
 598
 599                 buf[0] = '\0';
 600
 601                 /* write email to mboxrc */
 602                 while (SC_FGETS(buf, sizeof(buf), msg_fp) != NULL) {
 603                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 604                         int offset;
 605
 606                         offset = 0;
 607                         /* detect leading '>' char(s) */
 608                         while ((buf[offset] == '>')) {
 609                                 offset++;
 610                         }
 611                         if (!strncmp(buf+offset, "From ", 5)) {
 612                                 if (SC_FPUTC('>', mbox_fp) == EOF) {
 613                                         err = -1;
 614 #ifdef HAVE_FGETS_UNLOCKED
 615                                         funlockfile(msg_fp);
 616 #endif
 617                                         fclose(msg_fp);
 618                                         goto out;
 619                                 }
 620                         }
 621                         if (SC_FPUTS(buf, mbox_fp) == EOF) {
 622                                 err = -1;
 623 #ifdef HAVE_FGETS_UNLOCKED
 624                                 funlockfile(msg_fp);
 625 #endif
 626                                 fclose(msg_fp);
 627                                 goto out;
 628                         }
 629                 }
 630
 631                 /* force last line to end w/ a newline */
 632                 len = strlen(buf);
 633                 if (len > 0) {
 634                         len--;
 635                         if ((buf[len] != '\n') && (buf[len] != '\r')) {
 636                                 if (SC_FPUTC('\n', mbox_fp) == EOF) {
 637                                         err = -1;
 638 #ifdef HAVE_FGETS_UNLOCKED
 639                                         funlockfile(msg_fp);
 640 #endif
 641                                         fclose(msg_fp);
 642                                         goto out;
 643                                 }
 644                         }
 645                 }
 646
 647                 /* add a trailing empty line */
 648                 if (SC_FPUTC('\n', mbox_fp) == EOF) {
 649                         err = -1;
 650 #ifdef HAVE_FGETS_UNLOCKED
 651                         funlockfile(msg_fp);
 652 #endif
 653                         fclose(msg_fp);
 654                         goto out;
 655                 }
 656
 657 #ifdef HAVE_FGETS_UNLOCKED
 658                 funlockfile(msg_fp);
 659 #endif
 660                 fclose(msg_fp);
 661                 statusbar_progress_all(msgs++,total, 500);
 662                 if (msgs%500 == 0)
 663                         GTK_EVENTS_FLUSH();
 664         }
 665
 666 out:
 667         statusbar_progress_all(0,0,0);
 668         statuswindow_pop_all();
 669
 670 #ifdef HAVE_FGETS_UNLOCKED
 671         funlockfile(mbox_fp);
 672 #endif
 673         fclose(mbox_fp);
 674
 675         return err;
 676 }
 677
 678 /* read all messages in SRC, and store them into one MBOX file. */
 679 /* return values: -2 skipped, -1 error, 0 OK */
 680 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 681 {
 682         GSList *mlist;
 683         gint ret;
 684
 685         cm_return_val_if_fail(src != NULL, -1);
 686         cm_return_val_if_fail(src->folder != NULL, -1);
 687         cm_return_val_if_fail(mbox != NULL, -1);
 688
 689         debug_print("Exporting messages from %s into %s...\n",
 690                     src->path, mbox);
 691
 692         mlist = folder_item_get_msg_list(src);
 693
 694         folder_item_update_freeze();
 695         ret = export_list_to_mbox(mlist, mbox);
 696         folder_item_update_thaw();
 697
 698         procmsg_msg_list_free(mlist);
 699
 700         return ret;
 701 }