src/mbox.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24
  25 #define _GNU_SOURCE
  26 #include <stdio.h>
  27
  28 #include "defs.h"
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <string.h>
  34 #include <fcntl.h>
  35 #include <sys/file.h>
  36 #include <ctype.h>
  37 #include <time.h>
  38 #include <errno.h>
  39
  40 #include "mbox.h"
  41 #include "procmsg.h"
  42 #include "folder.h"
  43 #include "prefs_common.h"
  44 #include "prefs_account.h"
  45 #include "account.h"
  46 #include "utils.h"
  47 #include "filtering.h"
  48 #include "alertpanel.h"
  49 #include "statusbar.h"
  50
  51 #define MSGBUFSIZE      8192
  52
  53 #ifdef HAVE_FGETS_UNLOCKED
  54 #define SC_FGETS fgets_unlocked
  55 #define SC_FPUTS fputs_unlocked
  56 #define SC_FPUTC fputc_unlocked
  57 #else
  58 #define SC_FGETS fgets
  59 #define SC_FPUTS fputs
  60 #define SC_FPUTC fputc
  61 #endif
  62
  63 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  64 { \
  65         lines++; \
  66         if (fputs(s, tmp_fp) == EOF) { \
  67                 g_warning("can't write to temporary file\n"); \
  68                 fclose(tmp_fp); \
  69                 fclose(mbox_fp); \
  70                 g_unlink(tmp_file); \
  71                 g_free(tmp_file); \
  72                 return -1; \
  73         } \
  74 }
  75
  76 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter,
  77                PrefsAccount *account)
  78 /* return values: -1 error, >=0 number of msgs added */
  79 {
  80         FILE *mbox_fp;
  81         gchar buf[MSGBUFSIZE];
  82         gchar *tmp_file;
  83         gint msgs = 0;
  84         gint lines;
  85         MsgInfo *msginfo;
  86         gboolean more;
  87         GSList *to_filter = NULL, *filtered = NULL, *unfiltered = NULL, *cur, *to_add = NULL;
  88         gboolean printed = FALSE;
  89         FolderItem *dropfolder;
  90
  91         g_return_val_if_fail(dest != NULL, -1);
  92         g_return_val_if_fail(mbox != NULL, -1);
  93
  94         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  95
  96         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
  97                 FILE_OP_ERROR(mbox, "fopen");
  98                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
  99                 return -1;
 100         }
 101
 102         /* ignore empty lines on the head */
 103         do {
 104                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 105                         g_warning("can't read mbox file.\n");
 106                         fclose(mbox_fp);
 107                         return -1;
 108                 }
 109         } while (buf[0] == '\n' || buf[0] == '\r');
 110
 111         if (strncmp(buf, "From ", 5) != 0) {
 112                 g_warning("invalid mbox format: %s\n", mbox);
 113                 fclose(mbox_fp);
 114                 return -1;
 115         }
 116
 117         tmp_file = get_tmp_file();
 118
 119         folder_item_update_freeze();
 120
 121         if (apply_filter)
 122                 dropfolder = folder_get_default_processing();
 123         else
 124                 dropfolder = dest;
 125
 126         do {
 127                 FILE *tmp_fp;
 128                 gint empty_lines;
 129                 gint msgnum;
 130
 131                 if (msgs > 0 && msgs%500 == 0) {
 132                         if (printed)
 133                                 statusbar_pop_all();
 134                         statusbar_print_all(_("Importing from mbox... (%d mails imported)"), msgs);
 135                         printed=TRUE;
 136                         GTK_EVENTS_FLUSH();
 137                 }
 138
 139                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 140                         FILE_OP_ERROR(tmp_file, "fopen");
 141                         g_warning("can't open temporary file\n");
 142                         fclose(mbox_fp);
 143                         g_free(tmp_file);
 144                         return -1;
 145                 }
 146                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 147                         FILE_OP_ERROR(tmp_file, "chmod");
 148                 }
 149
 150                 empty_lines = 0;
 151                 lines = 0;
 152                 more = FALSE;
 153
 154                 /* process all lines from mboxrc file */
 155                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 156                         int offset;
 157
 158                         /* eof not reached, expect more lines */
 159                         more = TRUE;
 160
 161                         /* eat empty lines */
 162                         if (buf[0] == '\n' || buf[0] == '\r') {
 163                                 empty_lines++;
 164                                 continue;
 165                         }
 166
 167                         /* From separator or quoted From */
 168                         offset = 0;
 169                         /* detect leading '>' char(s) */
 170                         while ((buf[offset] == '>')) {
 171                                 offset++;
 172                         }
 173                         if (!strncmp(buf+offset, "From ", 5)) {
 174                                 /* From separator: */
 175                                 if (offset == 0) {
 176                                         /* expect next mbox item */
 177                                         break;
 178                                 }
 179
 180                                 /* quoted From: */
 181                                 /* flush any eaten empty line */
 182                                 if (empty_lines > 0) {
 183                                         while (empty_lines-- > 0) {
 184                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 185                                 }
 186                                         empty_lines = 0;
 187                                 }
 188                                 /* store the unquoted line */
 189                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 190                                 continue;
 191                         }
 192
 193                         /* other line */
 194                         /* flush any eaten empty line */
 195                         if (empty_lines > 0) {
 196                                 while (empty_lines-- > 0) {
 197                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 198                         }
 199                                 empty_lines = 0;
 200                         }
 201                         /* store the line itself */
 202                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 203                 }
 204                 /* end of mbox item or end of mbox */
 205
 206                 /* flush any eaten empty line (but the last one) */
 207                 if (empty_lines > 0) {
 208                         while (--empty_lines > 0) {
 209                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 210                         }
 211                 }
 212
 213                 /* more emails to expect? */
 214                 more = !feof(mbox_fp);
 215
 216                 /* warn if email part is empty (it's the minimum check
 217                    we can do */
 218                 if (lines == 0) {
 219                         g_warning("malformed mbox: %s: message %d is empty\n", mbox, msgs);
 220                         fclose(tmp_fp);
 221                         fclose(mbox_fp);
 222                         g_unlink(tmp_file);
 223                         return -1;
 224                 }
 225
 226                 if (fclose(tmp_fp) == EOF) {
 227                         FILE_OP_ERROR(tmp_file, "fclose");
 228                         g_warning("can't write to temporary file\n");
 229                         fclose(mbox_fp);
 230                         g_unlink(tmp_file);
 231                         g_free(tmp_file);
 232                         return -1;
 233                 }
 234
 235                 if (apply_filter) {
 236                         if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 237                                 fclose(mbox_fp);
 238                                 g_unlink(tmp_file);
 239                                 g_free(tmp_file);
 240                                 return -1;
 241                         }
 242                         msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 243                         to_filter = g_slist_prepend(to_filter, msginfo);
 244                 } else {
 245                         MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
 246                         finfo->file = tmp_file;
 247
 248                         to_add = g_slist_prepend(to_add, finfo);
 249                         tmp_file = get_tmp_file();
 250
 251                         /* flush every 500 */
 252                         if (msgs > 0 && msgs % 500 == 0) {
 253                                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 254                                 procmsg_message_file_list_free(to_add);
 255                                 to_add = NULL;
 256                         }
 257                 }
 258                 msgs++;
 259         } while (more);
 260
 261         if (printed)
 262                 statusbar_pop_all();
 263
 264         if (apply_filter) {
 265                 procmsg_msglist_filter(to_filter, account,
 266                                 &filtered, &unfiltered, TRUE);
 267
 268                 filtering_move_and_copy_msgs(to_filter);
 269                 for (cur = filtered; cur; cur = g_slist_next(cur)) {
 270                         MsgInfo *info = (MsgInfo *)cur->data;
 271                         procmsg_msginfo_free(info);
 272                 }
 273
 274                 unfiltered = g_slist_reverse(unfiltered);
 275                 folder_item_move_msgs(dest, unfiltered);
 276                 for (cur = unfiltered; cur; cur = g_slist_next(cur)) {
 277                         MsgInfo *info = (MsgInfo *)cur->data;
 278                         procmsg_msginfo_free(info);
 279                 }
 280
 281                 g_slist_free(unfiltered);
 282                 g_slist_free(filtered);
 283                 g_slist_free(to_filter);
 284         } else if (to_add) {
 285                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 286                 procmsg_message_file_list_free(to_add);
 287                 to_add = NULL;
 288         }
 289
 290         folder_item_update_thaw();
 291
 292         g_free(tmp_file);
 293         fclose(mbox_fp);
 294         debug_print("%d messages found.\n", msgs);
 295
 296         return msgs;
 297 }
 298
 299 gint lock_mbox(const gchar *base, LockType type)
 300 {
 301 #ifdef G_OS_UNIX
 302         gint retval = 0;
 303
 304         if (type == LOCK_FILE) {
 305                 gchar *lockfile, *locklink;
 306                 gint retry = 0;
 307                 FILE *lockfp;
 308
 309                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 310                 if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
 311                         FILE_OP_ERROR(lockfile, "fopen");
 312                         g_warning("can't create lock file %s\n", lockfile);
 313                         g_warning("use 'flock' instead of 'file' if possible.\n");
 314                         g_free(lockfile);
 315                         return -1;
 316                 }
 317
 318                 fprintf(lockfp, "%d\n", getpid());
 319                 fclose(lockfp);
 320
 321                 locklink = g_strconcat(base, ".lock", NULL);
 322                 while (link(lockfile, locklink) < 0) {
 323                         FILE_OP_ERROR(lockfile, "link");
 324                         if (retry >= 5) {
 325                                 g_warning("can't create %s\n", lockfile);
 326                                 g_unlink(lockfile);
 327                                 g_free(lockfile);
 328                                 return -1;
 329                         }
 330                         if (retry == 0)
 331                                 g_warning("mailbox is owned by another"
 332                                             " process, waiting...\n");
 333                         retry++;
 334                         sleep(5);
 335                 }
 336                 g_unlink(lockfile);
 337                 g_free(lockfile);
 338         } else if (type == LOCK_FLOCK) {
 339                 gint lockfd;
 340                 gboolean fcntled = FALSE;
 341 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 342                 struct flock fl;
 343                 fl.l_type = F_WRLCK;
 344                 fl.l_whence = SEEK_SET;
 345                 fl.l_start = 0;
 346                 fl.l_len = 0;
 347 #endif
 348
 349 #if HAVE_FLOCK
 350                 if ((lockfd = open(base, O_RDWR)) < 0) {
 351 #else
 352                 if ((lockfd = open(base, O_RDWR)) < 0) {
 353 #endif
 354                         FILE_OP_ERROR(base, "open");
 355                         return -1;
 356                 }
 357
 358 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 359                 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
 360                         g_warning("can't fnctl %s (%s)", base, strerror(errno));
 361                         return -1;
 362                 } else {
 363                         fcntled = TRUE;
 364                 }
 365 #endif
 366
 367 #if HAVE_FLOCK
 368                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
 369                         perror("flock");
 370 #else
 371 #if HAVE_LOCKF
 372                 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
 373                         perror("lockf");
 374 #else
 375                 {
 376 #endif
 377 #endif /* HAVE_FLOCK */
 378                         g_warning("can't lock %s\n", base);
 379                         if (close(lockfd) < 0)
 380                                 perror("close");
 381                         return -1;
 382                 }
 383                 retval = lockfd;
 384         } else {
 385                 g_warning("invalid lock type\n");
 386                 return -1;
 387         }
 388
 389         return retval;
 390 #else
 391         return -1;
 392 #endif /* G_OS_UNIX */
 393 }
 394
 395 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 396 {
 397         if (type == LOCK_FILE) {
 398                 gchar *lockfile;
 399
 400                 lockfile = g_strconcat(base, ".lock", NULL);
 401                 if (g_unlink(lockfile) < 0) {
 402                         FILE_OP_ERROR(lockfile, "unlink");
 403                         g_free(lockfile);
 404                         return -1;
 405                 }
 406                 g_free(lockfile);
 407
 408                 return 0;
 409         } else if (type == LOCK_FLOCK) {
 410                 gboolean fcntled = FALSE;
 411 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 412                 struct flock fl;
 413                 fl.l_type = F_UNLCK;
 414                 fl.l_whence = SEEK_SET;
 415                 fl.l_start = 0;
 416                 fl.l_len = 0;
 417
 418                 if (fcntl(fd, F_SETLK, &fl) == -1) {
 419                         g_warning("can't fnctl %s", base);
 420                 } else {
 421                         fcntled = TRUE;
 422                 }
 423 #endif
 424 #if HAVE_FLOCK
 425                 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
 426                         perror("flock");
 427 #else
 428 #if HAVE_LOCKF
 429                 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
 430                         perror("lockf");
 431 #else
 432                 {
 433 #endif
 434 #endif /* HAVE_FLOCK */
 435                         g_warning("can't unlock %s\n", base);
 436                         if (close(fd) < 0)
 437                                 perror("close");
 438                         return -1;
 439                 }
 440
 441                 if (close(fd) < 0) {
 442                         perror("close");
 443                         return -1;
 444                 }
 445
 446                 return 0;
 447         }
 448
 449         g_warning("invalid lock type\n");
 450         return -1;
 451 }
 452
 453 gint copy_mbox(gint srcfd, const gchar *dest)
 454 {
 455         FILE *dest_fp;
 456         ssize_t n_read;
 457         gchar buf[BUFSIZ];
 458         gboolean err = FALSE;
 459         int save_errno = 0;
 460
 461         if (srcfd < 0) {
 462                 return -1;
 463         }
 464
 465         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
 466                 FILE_OP_ERROR(dest, "fopen");
 467                 return -1;
 468         }
 469
 470         if (change_file_mode_rw(dest_fp, dest) < 0) {
 471                 FILE_OP_ERROR(dest, "chmod");
 472                 g_warning("can't change file mode\n");
 473         }
 474
 475         while ((n_read = read(srcfd, buf, sizeof(buf))) > 0) {
 476                 if (n_read == -1 && errno != 0) {
 477                         save_errno = errno;
 478                         break;
 479                 }
 480                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
 481                         g_warning("writing to %s failed.\n", dest);
 482                         fclose(dest_fp);
 483                         g_unlink(dest);
 484                         return -1;
 485                 }
 486         }
 487
 488         if (save_errno != 0) {
 489                 g_warning("error %d reading mbox: %s\n", save_errno,
 490                                 strerror(save_errno));
 491                 err = TRUE;
 492         }
 493
 494         if (fclose(dest_fp) == EOF) {
 495                 FILE_OP_ERROR(dest, "fclose");
 496                 err = TRUE;
 497         }
 498
 499         if (err) {
 500                 g_unlink(dest);
 501                 return -1;
 502         }
 503
 504         return 0;
 505 }
 506
 507 void empty_mbox(const gchar *mbox)
 508 {
 509         FILE *fp;
 510
 511         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 512                 FILE_OP_ERROR(mbox, "fopen");
 513                 g_warning("can't truncate mailbox to zero.\n");
 514                 return;
 515         }
 516         fclose(fp);
 517 }
 518
 519 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 520 /* return values: -2 skipped, -1 error, 0 OK */
 521 {
 522         GSList *cur;
 523         MsgInfo *msginfo;
 524         FILE *msg_fp;
 525         FILE *mbox_fp;
 526         gchar buf[BUFFSIZE];
 527         gint msgs = 1, total = g_slist_length(mlist);
 528         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 529                 if (alertpanel_full(_("Overwrite mbox file"),
 530                                         _("This file already exists. Do you want to overwrite it?"),
 531                                         GTK_STOCK_CANCEL, _("Overwrite"), NULL, FALSE,
 532                                         NULL, ALERT_WARNING, G_ALERTDEFAULT)
 533                                 != G_ALERTALTERNATE) {
 534                         return -2;
 535                 }
 536         }
 537
 538         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 539                 FILE_OP_ERROR(mbox, "fopen");
 540                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 541                 return -1;
 542         }
 543
 544 #ifdef HAVE_FGETS_UNLOCKED
 545         flockfile(mbox_fp);
 546 #endif
 547
 548         statusbar_print_all(_("Exporting to mbox..."));
 549         for (cur = mlist; cur != NULL; cur = cur->next) {
 550                 int len;
 551                 msginfo = (MsgInfo *)cur->data;
 552
 553                 msg_fp = procmsg_open_message(msginfo);
 554                 if (!msg_fp) {
 555                         continue;
 556                 }
 557
 558 #ifdef HAVE_FGETS_UNLOCKED
 559                 flockfile(msg_fp);
 560 #endif
 561                 strncpy2(buf,
 562                          msginfo->from ? msginfo->from :
 563                          cur_account && cur_account->address ?
 564                          cur_account->address : "unknown",
 565                          sizeof(buf));
 566                 extract_address(buf);
 567
 568                 fprintf(mbox_fp, "From %s %s",
 569                         buf, ctime(&msginfo->date_t));
 570
 571                 buf[0] = '\0';
 572
 573                 /* write email to mboxrc */
 574                 while (SC_FGETS(buf, sizeof(buf), msg_fp) != NULL) {
 575                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 576                         int offset;
 577
 578                         offset = 0;
 579                         /* detect leading '>' char(s) */
 580                         while ((buf[offset] == '>')) {
 581                                 offset++;
 582                         }
 583                         if (!strncmp(buf+offset, "From ", 5))
 584                                 SC_FPUTC('>', mbox_fp);
 585                         SC_FPUTS(buf, mbox_fp);
 586                 }
 587
 588                 /* force last line to end w/ a newline */
 589                 len = strlen(buf);
 590                 if (len > 0) {
 591                         len--;
 592                         if ((buf[len] != '\n') && (buf[len] != '\r'))
 593                                 SC_FPUTC('\n', mbox_fp);
 594                 }
 595
 596                 /* add a trailing empty line */
 597                 SC_FPUTC('\n', mbox_fp);
 598
 599 #ifdef HAVE_FGETS_UNLOCKED
 600                 funlockfile(msg_fp);
 601 #endif
 602                 fclose(msg_fp);
 603                 statusbar_progress_all(msgs++,total, 500);
 604                 if (msgs%500 == 0)
 605                         GTK_EVENTS_FLUSH();
 606         }
 607         statusbar_progress_all(0,0,0);
 608         statusbar_pop_all();
 609
 610 #ifdef HAVE_FGETS_UNLOCKED
 611         funlockfile(mbox_fp);
 612 #endif
 613         fclose(mbox_fp);
 614
 615         return 0;
 616 }
 617
 618 /* read all messages in SRC, and store them into one MBOX file. */
 619 /* return values: -2 skipped, -1 error, 0 OK */
 620 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 621 {
 622         GSList *mlist;
 623         gint ret;
 624
 625         g_return_val_if_fail(src != NULL, -1);
 626         g_return_val_if_fail(src->folder != NULL, -1);
 627         g_return_val_if_fail(mbox != NULL, -1);
 628
 629         debug_print("Exporting messages from %s into %s...\n",
 630                     src->path, mbox);
 631
 632         mlist = folder_item_get_msg_list(src);
 633
 634         folder_item_update_freeze();
 635         ret = export_list_to_mbox(mlist, mbox);
 636         folder_item_update_thaw();
 637
 638         procmsg_msg_list_free(mlist);
 639
 640         return ret;
 641 }