src/mbox.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2020 the Claws Mail team and Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 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 #include <stdio.h>
  27
  28 #ifdef USE_PTHREAD
  29 #include <pthread.h>
  30 #endif
  31
  32 #include "defs.h"
  33 #include <glib.h>
  34 #include <glib/gi18n.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <string.h>
  38 #include <fcntl.h>
  39 #include <sys/file.h>
  40 #include <ctype.h>
  41 #include <time.h>
  42 #include <errno.h>
  43
  44 #ifdef G_OS_WIN32
  45 #  include <w32lib.h>
  46 #endif
  47
  48 #include "mbox.h"
  49 #include "procmsg.h"
  50 #include "folder.h"
  51 #include "prefs_common.h"
  52 #include "prefs_account.h"
  53 #include "account.h"
  54 #include "utils.h"
  55 #include "filtering.h"
  56 #include "alertpanel.h"
  57 #include "statusbar.h"
  58 #include "file-utils.h"
  59
  60 #define MESSAGEBUFSIZE  8192
  61
  62 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  63 { \
  64         lines++; \
  65         if (claws_fputs(s, tmp_fp) == EOF) { \
  66                 g_warning("can't write to temporary file"); \
  67                 claws_fclose(tmp_fp); \
  68                 claws_fclose(mbox_fp); \
  69                 claws_unlink(tmp_file); \
  70                 g_free(tmp_file); \
  71                 return -1; \
  72         } \
  73 }
  74
  75 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
  76                PrefsAccount *account)
  77 /* return values: -1 error, >=0 number of msgs added */
  78 {
  79         FILE *mbox_fp;
  80         gchar buf[MESSAGEBUFSIZE];
  81         gchar *tmp_file;
  82         gint msgs = 0;
  83         gint lines;
  84         MsgInfo *msginfo;
  85         gboolean more;
  86         GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
  87         gboolean printed = FALSE;
  88         FolderItem *dropfolder;
  89         GStatBuf src_stat;
  90
  91         cm_return_val_if_fail(dest != NULL, -1);
  92         cm_return_val_if_fail(mbox != NULL, -1);
  93
  94         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  95
  96         if (g_stat(mbox, &src_stat) < 0) {
  97                 FILE_OP_ERROR(mbox, "g_stat");
  98                 alertpanel_error(_("Could not stat mbox file:\n%s\n"), mbox);
  99                 return -1;
 100         }
 101
 102         if ((mbox_fp = claws_fopen(mbox, "rb")) == NULL) {
 103                 FILE_OP_ERROR(mbox, "claws_fopen");
 104                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
 105                 return -1;
 106         }
 107
 108         /* ignore empty lines on the head */
 109         do {
 110                 if (claws_fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 111                         g_warning("can't read mbox file.");
 112                         claws_fclose(mbox_fp);
 113                         return -1;
 114                 }
 115         } while (buf[0] == '\n' || buf[0] == '\r');
 116
 117         if (strncmp(buf, "From ", 5) != 0) {
 118                 g_warning("invalid mbox format: %s", mbox);
 119                 claws_fclose(mbox_fp);
 120                 return -1;
 121         }
 122
 123         tmp_file = get_tmp_file();
 124
 125         folder_item_update_freeze();
 126
 127         if (apply_filter)
 128                 dropfolder = folder_get_default_processing(account->account_id);
 129         else
 130                 dropfolder = dest;
 131
 132         do {
 133                 FILE *tmp_fp;
 134                 gint empty_lines;
 135                 gint msgnum;
 136
 137                 if (msgs%10 == 0) {
 138                         long cur_offset_mb = ftell(mbox_fp) / (1024 * 1024);
 139                         if (printed)
 140                                 statusbar_pop_all();
 141                         statusbar_print_all(
 142                                         ngettext("Importing from mbox... (%ld MB imported)",
 143                                                 "Importing from mbox... (%ld MB imported)", cur_offset_mb), cur_offset_mb);
 144                         statusbar_progress_all(cur_offset_mb, src_stat.st_size / (1024*1024), 1);
 145                         printed=TRUE;
 146                         GTK_EVENTS_FLUSH();
 147                 }
 148
 149                 if ((tmp_fp = claws_fopen(tmp_file, "wb")) == NULL) {
 150                         FILE_OP_ERROR(tmp_file, "claws_fopen");
 151                         g_warning("can't open temporary file");
 152                         claws_fclose(mbox_fp);
 153                         g_free(tmp_file);
 154                         return -1;
 155                 }
 156                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 157                         FILE_OP_ERROR(tmp_file, "chmod");
 158                 }
 159
 160                 empty_lines = 0;
 161                 lines = 0;
 162
 163                 /* process all lines from mboxrc file */
 164                 while (claws_fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 165                         int offset;
 166
 167                         /* eat empty lines */
 168                         if (buf[0] == '\n' || buf[0] == '\r') {
 169                                 empty_lines++;
 170                                 continue;
 171                         }
 172
 173                         /* From separator or quoted From */
 174                         offset = 0;
 175                         /* detect leading '>' char(s) */
 176                         while (buf[offset] == '>') {
 177                                 offset++;
 178                         }
 179                         if (!strncmp(buf+offset, "From ", 5)) {
 180                                 /* From separator: */
 181                                 if (offset == 0) {
 182                                         /* expect next mbox item */
 183                                         break;
 184                                 }
 185
 186                                 /* quoted From: */
 187                                 /* flush any eaten empty line */
 188                                 if (empty_lines > 0) {
 189                                         while (empty_lines-- > 0) {
 190                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 191                                 }
 192                                         empty_lines = 0;
 193                                 }
 194                                 /* store the unquoted line */
 195                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 196                                 continue;
 197                         }
 198
 199                         /* other line */
 200                         /* flush any eaten empty line */
 201                         if (empty_lines > 0) {
 202                                 while (empty_lines-- > 0) {
 203                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 204                         }
 205                                 empty_lines = 0;
 206                         }
 207                         /* store the line itself */
 208                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 209                 }
 210                 /* end of mbox item or end of mbox */
 211
 212                 /* flush any eaten empty line (but the last one) */
 213                 if (empty_lines > 0) {
 214                         while (--empty_lines > 0) {
 215                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 216                         }
 217                 }
 218
 219                 /* more emails to expect? */
 220                 more = !claws_feof(mbox_fp);
 221
 222                 /* warn if email part is empty (it's the minimum check
 223                    we can do */
 224                 if (lines == 0) {
 225                         g_warning("malformed mbox: %s: message %d is empty", mbox, msgs);
 226                         claws_fclose(tmp_fp);
 227                         claws_fclose(mbox_fp);
 228                         claws_unlink(tmp_file);
 229                         return -1;
 230                 }
 231
 232                 if (claws_safe_fclose(tmp_fp) == EOF) {
 233                         FILE_OP_ERROR(tmp_file, "claws_fclose");
 234                         g_warning("can't write to temporary file");
 235                         claws_fclose(mbox_fp);
 236                         claws_unlink(tmp_file);
 237                         g_free(tmp_file);
 238                         return -1;
 239                 }
 240
 241                 if (apply_filter) {
 242                         if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 243                                 claws_fclose(mbox_fp);
 244                                 claws_unlink(tmp_file);
 245                                 g_free(tmp_file);
 246                                 return -1;
 247                         }
 248                         msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 249                         to_filter = g_slist_prepend(to_filter, msginfo);
 250                 } else {
 251                         MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
 252                         finfo->file = tmp_file;
 253
 254                         to_add = g_slist_prepend(to_add, finfo);
 255                         tmp_file = get_tmp_file();
 256
 257                         /* flush every 500 */
 258                         if (msgs > 0 && msgs % 500 == 0) {
 259                                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 260                                 procmsg_message_file_list_free(to_add);
 261                                 to_add = NULL;
 262                         }
 263                 }
 264                 msgs++;
 265         } while (more);
 266
 267         if (printed) {
 268                 statusbar_pop_all();
 269                 statusbar_progress_all(0, 0, 0);
 270         }
 271
 272         if (apply_filter) {
 273
 274                 folder_item_set_batch(dropfolder, FALSE);
 275                 procmsg_msglist_filter(to_filter, account,
 276                                 &filtered, &unfiltered, TRUE);
 277                 folder_item_set_batch(dropfolder, TRUE);
 278
 279                 filtering_move_and_copy_msgs(to_filter);
 280                 for (cur = filtered; cur; cur = g_slist_next(cur)) {
 281                         MsgInfo *info = (MsgInfo *)cur->data;
 282                         procmsg_msginfo_free(&info);
 283                 }
 284
 285                 unfiltered = g_slist_reverse(unfiltered);
 286                 if (unfiltered) {
 287                         folder_item_move_msgs(dest, unfiltered);
 288                         for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
 289                                 MsgInfo *info = (MsgInfo *)cur->data;
 290                                 procmsg_msginfo_free(&info);
 291                         }
 292                 }
 293
 294                 g_slist_free(unfiltered);
 295                 g_slist_free(filtered);
 296                 g_slist_free(to_filter);
 297         } else if (to_add) {
 298                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 299                 procmsg_message_file_list_free(to_add);
 300                 to_add = NULL;
 301         }
 302
 303         folder_item_update_thaw();
 304
 305         g_free(tmp_file);
 306         claws_fclose(mbox_fp);
 307         debug_print("%d messages found.\n", msgs);
 308
 309         return msgs;
 310 }
 311
 312 gint lock_mbox(const gchar *base, LockType type)
 313 {
 314 #ifdef G_OS_UNIX
 315         gint retval = 0;
 316
 317         if (type == LOCK_FILE) {
 318                 gchar *lockfile, *locklink;
 319                 gint retry = 0;
 320                 FILE *lockfp;
 321
 322                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 323                 if ((lockfp = claws_fopen(lockfile, "wb")) == NULL) {
 324                         FILE_OP_ERROR(lockfile, "claws_fopen");
 325                         g_warning("can't create lock file '%s', use 'flock' instead of 'file' if possible.", lockfile);
 326                         g_free(lockfile);
 327                         return -1;
 328                 }
 329
 330                 if (fprintf(lockfp, "%d\n", getpid()) < 0) {
 331                         FILE_OP_ERROR(lockfile, "fprintf");
 332                         g_free(lockfile);
 333                         claws_fclose(lockfp);
 334                         return -1;
 335                 }
 336
 337                 if (claws_safe_fclose(lockfp) == EOF) {
 338                         FILE_OP_ERROR(lockfile, "claws_fclose");
 339                         g_free(lockfile);
 340                         return -1;
 341                 }
 342
 343                 locklink = g_strconcat(base, ".lock", NULL);
 344                 while (link(lockfile, locklink) < 0) {
 345                         FILE_OP_ERROR(lockfile, "link");
 346                         if (retry >= 5) {
 347                                 g_warning("can't create '%s'", lockfile);
 348                                 claws_unlink(lockfile);
 349                                 g_free(lockfile);
 350                                 return -1;
 351                         }
 352                         if (retry == 0)
 353                                 g_warning("mailbox is owned by another"
 354                                           " process, waiting...");
 355                         retry++;
 356                         sleep(5);
 357                 }
 358                 claws_unlink(lockfile);
 359                 g_free(lockfile);
 360         } else if (type == LOCK_FLOCK) {
 361                 gint lockfd;
 362                 gboolean fcntled = FALSE;
 363 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 364                 struct flock fl;
 365                 fl.l_type = F_WRLCK;
 366                 fl.l_whence = SEEK_SET;
 367                 fl.l_start = 0;
 368                 fl.l_len = 0;
 369 #endif
 370
 371 #if HAVE_FLOCK
 372                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 373 #else
 374                 if ((lockfd = g_open(base, O_RDWR, 0)) < 0) {
 375 #endif
 376                         FILE_OP_ERROR(base, "open");
 377                         return -1;
 378                 }
 379
 380 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 381                 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
 382                         g_warning("can't fnctl %s (%s)", base, g_strerror(errno));
 383                         close(lockfd);
 384                         return -1;
 385                 } else {
 386                         fcntled = TRUE;
 387                 }
 388 #endif
 389
 390 #if HAVE_FLOCK
 391                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
 392                         perror("flock");
 393 #else
 394 #if HAVE_LOCKF
 395                 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
 396                         perror("lockf");
 397 #else
 398                 {
 399 #endif
 400 #endif /* HAVE_FLOCK */
 401                         g_warning("can't lock %s", base);
 402                         if (close(lockfd) < 0)
 403                                 perror("close");
 404                         return -1;
 405                 }
 406                 retval = lockfd;
 407         } else {
 408                 g_warning("invalid lock type");
 409                 return -1;
 410         }
 411
 412         return retval;
 413 #else
 414         return -1;
 415 #endif /* G_OS_UNIX */
 416 }
 417
 418 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 419 {
 420         if (type == LOCK_FILE) {
 421                 gchar *lockfile;
 422
 423                 lockfile = g_strconcat(base, ".lock", NULL);
 424                 if (claws_unlink(lockfile) < 0) {
 425                         FILE_OP_ERROR(lockfile, "unlink");
 426                         g_free(lockfile);
 427                         return -1;
 428                 }
 429                 g_free(lockfile);
 430
 431                 return 0;
 432         } else if (type == LOCK_FLOCK) {
 433 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 434                 gboolean fcntled = FALSE;
 435                 struct flock fl;
 436                 fl.l_type = F_UNLCK;
 437                 fl.l_whence = SEEK_SET;
 438                 fl.l_start = 0;
 439                 fl.l_len = 0;
 440
 441                 if (fcntl(fd, F_SETLK, &fl) == -1) {
 442                         g_warning("can't fnctl %s", base);
 443                 } else {
 444                         fcntled = TRUE;
 445                 }
 446 #endif
 447 #if HAVE_FLOCK
 448                 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
 449                         perror("flock");
 450 #else
 451 #if HAVE_LOCKF
 452                 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
 453                         perror("lockf");
 454 #else
 455                 {
 456 #endif
 457 #endif /* HAVE_FLOCK */
 458                         g_warning("can't unlock %s", base);
 459                         if (close(fd) < 0)
 460                                 perror("close");
 461                         return -1;
 462                 }
 463
 464                 if (close(fd) < 0) {
 465                         perror("close");
 466                         return -1;
 467                 }
 468
 469                 return 0;
 470         }
 471
 472         g_warning("invalid lock type");
 473         return -1;
 474 }
 475
 476 gint copy_mbox(gint srcfd, const gchar *dest)
 477 {
 478         FILE *dest_fp;
 479         ssize_t n_read;
 480         gchar buf[BUFSIZ];
 481         gboolean err = FALSE;
 482         int save_errno = 0;
 483
 484         if (srcfd < 0) {
 485                 return -1;
 486         }
 487
 488         if ((dest_fp = claws_fopen(dest, "wb")) == NULL) {
 489                 FILE_OP_ERROR(dest, "claws_fopen");
 490                 return -1;
 491         }
 492
 493         if (change_file_mode_rw(dest_fp, dest) < 0) {
 494                 FILE_OP_ERROR(dest, "chmod");
 495                 g_warning("can't change file mode");
 496         }
 497
 498         while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
 499                 if (claws_fwrite(buf, 1, n_read, dest_fp) < n_read) {
 500                         g_warning("writing to %s failed.", dest);
 501                         claws_fclose(dest_fp);
 502                         claws_unlink(dest);
 503                         return -1;
 504                 }
 505         }
 506
 507         if (save_errno != 0) {
 508                 g_warning("error %d reading mbox: %s", save_errno,
 509                                 g_strerror(save_errno));
 510                 err = TRUE;
 511         }
 512
 513         if (claws_safe_fclose(dest_fp) == EOF) {
 514                 FILE_OP_ERROR(dest, "claws_fclose");
 515                 err = TRUE;
 516         }
 517
 518         if (err) {
 519                 claws_unlink(dest);
 520                 return -1;
 521         }
 522
 523         return 0;
 524 }
 525
 526 void empty_mbox(const gchar *mbox)
 527 {
 528         FILE *fp;
 529
 530         if ((fp = claws_fopen(mbox, "wb")) == NULL) {
 531                 FILE_OP_ERROR(mbox, "claws_fopen");
 532                 g_warning("can't truncate mailbox to zero.");
 533                 return;
 534         }
 535         claws_safe_fclose(fp);
 536 }
 537
 538 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 539 /* return values: -2 skipped, -1 error, 0 OK */
 540 {
 541         GSList *cur;
 542         MsgInfo *msginfo;
 543         FILE *msg_fp;
 544         FILE *mbox_fp;
 545         gchar buf[BUFFSIZE];
 546         int err = 0;
 547
 548         gint msgs = 1, total = g_slist_length(mlist);
 549         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 550                 if (alertpanel_full(_("Overwrite mbox file"),
 551                                         _("This file already exists. Do you want to overwrite it?"),
 552                                         GTK_STOCK_CANCEL, _("Overwrite"), NULL,
 553                                         ALERTFOCUS_FIRST, FALSE, NULL, ALERT_WARNING)
 554                                 != G_ALERTALTERNATE) {
 555                         return -2;
 556                 }
 557         }
 558
 559         if ((mbox_fp = claws_fopen(mbox, "wb")) == NULL) {
 560                 FILE_OP_ERROR(mbox, "claws_fopen");
 561                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 562                 return -1;
 563         }
 564
 565         statusbar_print_all(_("Exporting to mbox..."));
 566         for (cur = mlist; cur != NULL; cur = cur->next) {
 567                 int len;
 568                 gchar buft[BUFFSIZE];
 569                 msginfo = (MsgInfo *)cur->data;
 570
 571                 msg_fp = procmsg_open_message(msginfo, TRUE);
 572                 if (!msg_fp) {
 573                         continue;
 574                 }
 575
 576                 strncpy2(buf,
 577                          msginfo->from ? msginfo->from :
 578                          cur_account && cur_account->address ?
 579                          cur_account->address : "unknown",
 580                          sizeof(buf));
 581                 extract_address(buf);
 582
 583                 if (fprintf(mbox_fp, "From %s %s",
 584                         buf, ctime_r(&msginfo->date_t, buft)) < 0) {
 585                         err = -1;
 586                         claws_fclose(msg_fp);
 587                         goto out;
 588                 }
 589
 590                 buf[0] = '\0';
 591
 592                 /* write email to mboxrc */
 593                 while (claws_fgets(buf, sizeof(buf), msg_fp) != NULL) {
 594                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 595                         int offset;
 596
 597                         offset = 0;
 598                         /* detect leading '>' char(s) */
 599                         while (buf[offset] == '>') {
 600                                 offset++;
 601                         }
 602                         if (!strncmp(buf+offset, "From ", 5)) {
 603                                 if (claws_fputc('>', mbox_fp) == EOF) {
 604                                         err = -1;
 605                                         claws_fclose(msg_fp);
 606                                         goto out;
 607                                 }
 608                         }
 609                         if (claws_fputs(buf, mbox_fp) == EOF) {
 610                                 err = -1;
 611                                 claws_fclose(msg_fp);
 612                                 goto out;
 613                         }
 614                 }
 615
 616                 /* force last line to end w/ a newline */
 617                 len = strlen(buf);
 618                 if (len > 0) {
 619                         len--;
 620                         if ((buf[len] != '\n') && (buf[len] != '\r')) {
 621                                 if (claws_fputc('\n', mbox_fp) == EOF) {
 622                                         err = -1;
 623                                         claws_fclose(msg_fp);
 624                                         goto out;
 625                                 }
 626                         }
 627                 }
 628
 629                 /* add a trailing empty line */
 630                 if (claws_fputc('\n', mbox_fp) == EOF) {
 631                         err = -1;
 632                         claws_fclose(msg_fp);
 633                         goto out;
 634                 }
 635
 636                 claws_safe_fclose(msg_fp);
 637                 statusbar_progress_all(msgs++,total, 500);
 638                 if (msgs%500 == 0)
 639                         GTK_EVENTS_FLUSH();
 640         }
 641
 642 out:
 643         statusbar_progress_all(0,0,0);
 644         statusbar_pop_all();
 645
 646         claws_safe_fclose(mbox_fp);
 647
 648         return err;
 649 }
 650
 651 /* read all messages in SRC, and store them into one MBOX file. */
 652 /* return values: -2 skipped, -1 error, 0 OK */
 653 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 654 {
 655         GSList *mlist;
 656         gint ret;
 657
 658         cm_return_val_if_fail(src != NULL, -1);
 659         cm_return_val_if_fail(src->folder != NULL, -1);
 660         cm_return_val_if_fail(mbox != NULL, -1);
 661
 662         debug_print("Exporting messages from %s into %s...\n",
 663                     src->path, mbox);
 664
 665         mlist = folder_item_get_msg_list(src);
 666
 667         folder_item_update_freeze();
 668         ret = export_list_to_mbox(mlist, mbox);
 669         folder_item_update_thaw();
 670
 671         procmsg_msg_list_free(mlist);
 672
 673         return ret;
 674 }