src/mbox.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Sylpheed-Claws 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 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32 #include <sys/file.h>
  33 #include <ctype.h>
  34 #include <time.h>
  35 #include <errno.h>
  36
  37 #include "mbox.h"
  38 #include "procmsg.h"
  39 #include "folder.h"
  40 #include "prefs_common.h"
  41 #include "prefs_account.h"
  42 #include "account.h"
  43 #include "utils.h"
  44 #include "filtering.h"
  45 #include "alertpanel.h"
  46 #include "statusbar.h"
  47
  48 #define MSGBUFSIZE      8192
  49
  50 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  51 { \
  52         lines++; \
  53         if (fputs(s, tmp_fp) == EOF) { \
  54                 g_warning("can't write to temporary file\n"); \
  55                 fclose(tmp_fp); \
  56                 fclose(mbox_fp); \
  57                 g_unlink(tmp_file); \
  58                 g_free(tmp_file); \
  59                 return -1; \
  60         } \
  61 }
  62
  63 gint proc_mbox(FolderItem *dest, const gchar *mbox, gboolean apply_filter)
  64 /* return values: -1 error, >=0 number of msgs added */
  65 {
  66         FILE *mbox_fp;
  67         gchar buf[MSGBUFSIZE];
  68         gchar *tmp_file;
  69         gint msgs = 0;
  70         gint lines;
  71         MsgInfo *msginfo;
  72         gboolean more;
  73         GSList *to_filter = NULL, *to_drop = NULL, *cur, *to_add = NULL;
  74         gboolean printed = FALSE;
  75         FolderItem *dropfolder;
  76
  77         g_return_val_if_fail(dest != NULL, -1);
  78         g_return_val_if_fail(mbox != NULL, -1);
  79
  80         debug_print("Getting messages from %s into %s...\n", mbox, dest->path);
  81
  82         if ((mbox_fp = g_fopen(mbox, "rb")) == NULL) {
  83                 FILE_OP_ERROR(mbox, "fopen");
  84                 alertpanel_error(_("Could not open mbox file:\n%s\n"), mbox);
  85                 return -1;
  86         }
  87
  88         /* ignore empty lines on the head */
  89         do {
  90                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  91                         g_warning("can't read mbox file.\n");
  92                         fclose(mbox_fp);
  93                         return -1;
  94                 }
  95         } while (buf[0] == '\n' || buf[0] == '\r');
  96
  97         if (strncmp(buf, "From ", 5) != 0) {
  98                 g_warning("invalid mbox format: %s\n", mbox);
  99                 fclose(mbox_fp);
 100                 return -1;
 101         }
 102
 103         tmp_file = get_tmp_file();
 104
 105         folder_item_update_freeze();
 106
 107         if (apply_filter)
 108                 dropfolder = folder_get_default_processing();
 109         else
 110                 dropfolder = dest;
 111
 112         do {
 113                 FILE *tmp_fp;
 114                 gint empty_lines;
 115                 gint msgnum;
 116
 117                 if (msgs > 0 && msgs%500 == 0) {
 118                         if (printed)
 119                                 statusbar_pop_all();
 120                         statusbar_print_all(_("Importing from mbox... (%d mails imported)"), msgs);
 121                         printed=TRUE;
 122                         GTK_EVENTS_FLUSH();
 123                 }
 124
 125                 if ((tmp_fp = g_fopen(tmp_file, "wb")) == NULL) {
 126                         FILE_OP_ERROR(tmp_file, "fopen");
 127                         g_warning("can't open temporary file\n");
 128                         fclose(mbox_fp);
 129                         g_free(tmp_file);
 130                         return -1;
 131                 }
 132                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0) {
 133                         FILE_OP_ERROR(tmp_file, "chmod");
 134                 }
 135
 136                 empty_lines = 0;
 137                 lines = 0;
 138                 more = FALSE;
 139
 140                 /* process all lines from mboxrc file */
 141                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 142                         int offset;
 143
 144                         /* eof not reached, expect more lines */
 145                         more = TRUE;
 146
 147                         /* eat empty lines */
 148                         if (buf[0] == '\n' || buf[0] == '\r') {
 149                                 empty_lines++;
 150                                 continue;
 151                         }
 152
 153                         /* From separator or quoted From */
 154                         offset = 0;
 155                         /* detect leading '>' char(s) */
 156                         while ((buf[offset] == '>')) {
 157                                 offset++;
 158                         }
 159                         if (!strncmp(buf+offset, "From ", 5)) {
 160                                 /* From separator: */
 161                                 if (offset == 0) {
 162                                         /* expect next mbox item */
 163                                         break;
 164                                 }
 165
 166                                 /* quoted From: */
 167                                 /* flush any eaten empty line */
 168                                 if (empty_lines > 0) {
 169                                         while (empty_lines-- > 0) {
 170                                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 171                                 }
 172                                         empty_lines = 0;
 173                                 }
 174                                 /* store the unquoted line */
 175                                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 176                                 continue;
 177                         }
 178
 179                         /* other line */
 180                         /* flush any eaten empty line */
 181                         if (empty_lines > 0) {
 182                                 while (empty_lines-- > 0) {
 183                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 184                         }
 185                                 empty_lines = 0;
 186                         }
 187                         /* store the line itself */
 188                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 189                 }
 190                 /* end of mbox item or end of mbox */
 191
 192                 /* flush any eaten empty line (but the last one) */
 193                 if (empty_lines > 0) {
 194                         while (--empty_lines > 0) {
 195                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 196                         }
 197                 }
 198
 199                 /* more emails to expect? */
 200                 more = !feof(mbox_fp);
 201
 202                 /* warn if email part is empty (it's the minimum check
 203                    we can do */
 204                 if (lines == 0) {
 205                         g_warning("malformed mbox: %s: message %d is empty\n", mbox, msgs);
 206                         fclose(tmp_fp);
 207                         fclose(mbox_fp);
 208                         g_unlink(tmp_file);
 209                         return -1;
 210                 }
 211
 212                 if (fclose(tmp_fp) == EOF) {
 213                         FILE_OP_ERROR(tmp_file, "fclose");
 214                         g_warning("can't write to temporary file\n");
 215                         fclose(mbox_fp);
 216                         g_unlink(tmp_file);
 217                         g_free(tmp_file);
 218                         return -1;
 219                 }
 220
 221                 if (apply_filter) {
 222                         if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, NULL, TRUE)) < 0) {
 223                                 fclose(mbox_fp);
 224                                 g_unlink(tmp_file);
 225                                 g_free(tmp_file);
 226                                 return -1;
 227                         }
 228                         msginfo = folder_item_get_msginfo(dropfolder, msgnum);
 229                         if (!procmsg_msginfo_filter(msginfo))
 230                                 to_drop = g_slist_prepend(to_drop, msginfo);
 231                         else
 232                                 to_filter = g_slist_prepend(to_filter, msginfo);
 233                 } else {
 234                         MsgFileInfo *finfo = g_new0(MsgFileInfo, 1);
 235                         finfo->file = tmp_file;
 236
 237                         to_add = g_slist_prepend(to_add, finfo);
 238                         tmp_file = get_tmp_file();
 239
 240                         /* flush every 500 */
 241                         if (msgs > 0 && msgs % 500 == 0) {
 242                                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 243                                 procmsg_message_file_list_free(to_add);
 244                                 to_add = NULL;
 245                         }
 246                 }
 247                 msgs++;
 248         } while (more);
 249
 250         if (printed)
 251                 statusbar_pop_all();
 252
 253         if (apply_filter) {
 254                 to_drop = g_slist_reverse(to_drop);
 255                 folder_item_move_msgs(dest, to_drop);
 256                 for (cur = to_drop; cur; cur = g_slist_next(cur)) {
 257                         MsgInfo *info = (MsgInfo *)cur->data;
 258                         procmsg_msginfo_free(info);
 259                 }
 260
 261                 to_filter = g_slist_reverse(to_filter);
 262                 filtering_move_and_copy_msgs(to_filter);
 263                 for (cur = to_filter; cur; cur = g_slist_next(cur)) {
 264                         MsgInfo *info = (MsgInfo *)cur->data;
 265                         procmsg_msginfo_free(info);
 266                 }
 267
 268                 g_slist_free(to_drop);
 269                 g_slist_free(to_filter);
 270         } else if (to_add) {
 271                 folder_item_add_msgs(dropfolder, to_add, TRUE);
 272                 procmsg_message_file_list_free(to_add);
 273                 to_add = NULL;
 274         }
 275
 276         folder_item_update_thaw();
 277
 278         g_free(tmp_file);
 279         fclose(mbox_fp);
 280         debug_print("%d messages found.\n", msgs);
 281
 282         return msgs;
 283 }
 284
 285 gint lock_mbox(const gchar *base, LockType type)
 286 {
 287 #ifdef G_OS_UNIX
 288         gint retval = 0;
 289
 290         if (type == LOCK_FILE) {
 291                 gchar *lockfile, *locklink;
 292                 gint retry = 0;
 293                 FILE *lockfp;
 294
 295                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 296                 if ((lockfp = g_fopen(lockfile, "wb")) == NULL) {
 297                         FILE_OP_ERROR(lockfile, "fopen");
 298                         g_warning("can't create lock file %s\n", lockfile);
 299                         g_warning("use 'flock' instead of 'file' if possible.\n");
 300                         g_free(lockfile);
 301                         return -1;
 302                 }
 303
 304                 fprintf(lockfp, "%d\n", getpid());
 305                 fclose(lockfp);
 306
 307                 locklink = g_strconcat(base, ".lock", NULL);
 308                 while (link(lockfile, locklink) < 0) {
 309                         FILE_OP_ERROR(lockfile, "link");
 310                         if (retry >= 5) {
 311                                 g_warning("can't create %s\n", lockfile);
 312                                 g_unlink(lockfile);
 313                                 g_free(lockfile);
 314                                 return -1;
 315                         }
 316                         if (retry == 0)
 317                                 g_warning("mailbox is owned by another"
 318                                             " process, waiting...\n");
 319                         retry++;
 320                         sleep(5);
 321                 }
 322                 g_unlink(lockfile);
 323                 g_free(lockfile);
 324         } else if (type == LOCK_FLOCK) {
 325                 gint lockfd;
 326                 gboolean fcntled = FALSE;
 327 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 328                 struct flock fl;
 329                 fl.l_type = F_WRLCK;
 330                 fl.l_whence = SEEK_SET;
 331                 fl.l_start = 0;
 332                 fl.l_len = 0;
 333 #endif
 334
 335 #if HAVE_FLOCK
 336                 if ((lockfd = open(base, O_RDWR)) < 0) {
 337 #else
 338                 if ((lockfd = open(base, O_RDWR)) < 0) {
 339 #endif
 340                         FILE_OP_ERROR(base, "open");
 341                         return -1;
 342                 }
 343
 344 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 345                 if (fcntl(lockfd, F_SETLK, &fl) == -1) {
 346                         g_warning("can't fnctl %s (%s)", base, strerror(errno));
 347                         return -1;
 348                 } else {
 349                         fcntled = TRUE;
 350                 }
 351 #endif
 352
 353 #if HAVE_FLOCK
 354                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0 && !fcntled) {
 355                         perror("flock");
 356 #else
 357 #if HAVE_LOCKF
 358                 if (lockf(lockfd, F_TLOCK, 0) < 0 && !fcntled) {
 359                         perror("lockf");
 360 #else
 361                 {
 362 #endif
 363 #endif /* HAVE_FLOCK */
 364                         g_warning("can't lock %s\n", base);
 365                         if (close(lockfd) < 0)
 366                                 perror("close");
 367                         return -1;
 368                 }
 369                 retval = lockfd;
 370         } else {
 371                 g_warning("invalid lock type\n");
 372                 return -1;
 373         }
 374
 375         return retval;
 376 #else
 377         return -1;
 378 #endif /* G_OS_UNIX */
 379 }
 380
 381 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 382 {
 383         if (type == LOCK_FILE) {
 384                 gchar *lockfile;
 385
 386                 lockfile = g_strconcat(base, ".lock", NULL);
 387                 if (g_unlink(lockfile) < 0) {
 388                         FILE_OP_ERROR(lockfile, "unlink");
 389                         g_free(lockfile);
 390                         return -1;
 391                 }
 392                 g_free(lockfile);
 393
 394                 return 0;
 395         } else if (type == LOCK_FLOCK) {
 396                 gboolean fcntled = FALSE;
 397 #if HAVE_FCNTL_H && !defined(G_OS_WIN32)
 398                 struct flock fl;
 399                 fl.l_type = F_UNLCK;
 400                 fl.l_whence = SEEK_SET;
 401                 fl.l_start = 0;
 402                 fl.l_len = 0;
 403
 404                 if (fcntl(fd, F_SETLK, &fl) == -1) {
 405                         g_warning("can't fnctl %s", base);
 406                         return -1;
 407                 } else {
 408                         fcntled = TRUE;
 409                 }
 410 #endif
 411 #if HAVE_FLOCK
 412                 if (flock(fd, LOCK_UN) < 0 && !fcntled) {
 413                         perror("flock");
 414 #else
 415 #if HAVE_LOCKF
 416                 if (lockf(fd, F_ULOCK, 0) < 0 && !fcntled) {
 417                         perror("lockf");
 418 #else
 419                 {
 420 #endif
 421 #endif /* HAVE_FLOCK */
 422                         g_warning("can't unlock %s\n", base);
 423                         if (close(fd) < 0)
 424                                 perror("close");
 425                         return -1;
 426                 }
 427
 428                 if (close(fd) < 0) {
 429                         perror("close");
 430                         return -1;
 431                 }
 432
 433                 return 0;
 434         }
 435
 436         g_warning("invalid lock type\n");
 437         return -1;
 438 }
 439
 440 gint copy_mbox(const gchar *src, const gchar *dest)
 441 {
 442         return copy_file(src, dest, TRUE);
 443 }
 444
 445 void empty_mbox(const gchar *mbox)
 446 {
 447         FILE *fp;
 448
 449         if ((fp = g_fopen(mbox, "wb")) == NULL) {
 450                 FILE_OP_ERROR(mbox, "fopen");
 451                 g_warning("can't truncate mailbox to zero.\n");
 452                 return;
 453         }
 454         fclose(fp);
 455 }
 456
 457 gint export_list_to_mbox(GSList *mlist, const gchar *mbox)
 458 /* return values: -2 skipped, -1 error, 0 OK */
 459 {
 460         GSList *cur;
 461         MsgInfo *msginfo;
 462         FILE *msg_fp;
 463         FILE *mbox_fp;
 464         gchar buf[BUFFSIZE];
 465         gint msgs = 1, total = g_slist_length(mlist);
 466         if (g_file_test(mbox, G_FILE_TEST_EXISTS) == TRUE) {
 467                 if (alertpanel_full(_("Overwrite mbox file"),
 468                                         _("This file already exists. Do you want to overwrite it?"),
 469                                         GTK_STOCK_CANCEL, _("Overwrite"), NULL, FALSE,
 470                                         NULL, ALERT_WARNING, G_ALERTDEFAULT)
 471                                 != G_ALERTALTERNATE) {
 472                         return -2;
 473                 }
 474         }
 475
 476         if ((mbox_fp = g_fopen(mbox, "wb")) == NULL) {
 477                 FILE_OP_ERROR(mbox, "fopen");
 478                 alertpanel_error(_("Could not create mbox file:\n%s\n"), mbox);
 479                 return -1;
 480         }
 481
 482         statusbar_print_all(_("Exporting to mbox..."));
 483         for (cur = mlist; cur != NULL; cur = cur->next) {
 484                 msginfo = (MsgInfo *)cur->data;
 485                 int len;
 486
 487                 msg_fp = procmsg_open_message(msginfo);
 488                 if (!msg_fp) {
 489                         continue;
 490                 }
 491
 492                 strncpy2(buf,
 493                          msginfo->from ? msginfo->from :
 494                          cur_account && cur_account->address ?
 495                          cur_account->address : "unknown",
 496                          sizeof(buf));
 497                 extract_address(buf);
 498
 499                 fprintf(mbox_fp, "From %s %s",
 500                         buf, ctime(&msginfo->date_t));
 501
 502                 buf[0] = '\0';
 503
 504                 /* write email to mboxrc */
 505                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 506                         /* quote any From, >From, >>From, etc., according to mbox format specs */
 507                         int offset;
 508
 509                         offset = 0;
 510                         /* detect leading '>' char(s) */
 511                         while ((buf[offset] == '>')) {
 512                                 offset++;
 513                         }
 514                         if (!strncmp(buf+offset, "From ", 5))
 515                                 fputc('>', mbox_fp);
 516                         fputs(buf, mbox_fp);
 517                 }
 518
 519                 /* force last line to end w/ a newline */
 520                 len = strlen(buf);
 521                 if (len > 0) {
 522                         len--;
 523                         if ((buf[len] != '\n') && (buf[len] != '\r'))
 524                                 fputc('\n', mbox_fp);
 525                 }
 526
 527                 /* add a trailing empty line */
 528                 fputc('\n', mbox_fp);
 529
 530                 fclose(msg_fp);
 531                 statusbar_progress_all(msgs++,total, 500);
 532                 if (msgs%500 == 0)
 533                         GTK_EVENTS_FLUSH();
 534         }
 535         statusbar_progress_all(0,0,0);
 536         statusbar_pop_all();
 537
 538         fclose(mbox_fp);
 539
 540         return 0;
 541 }
 542
 543 /* read all messages in SRC, and store them into one MBOX file. */
 544 /* return values: -2 skipped, -1 error, 0 OK */
 545 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 546 {
 547         GSList *mlist;
 548         gint ret;
 549
 550         g_return_val_if_fail(src != NULL, -1);
 551         g_return_val_if_fail(src->folder != NULL, -1);
 552         g_return_val_if_fail(mbox != NULL, -1);
 553
 554         debug_print("Exporting messages from %s into %s...\n",
 555                     src->path, mbox);
 556
 557         mlist = folder_item_get_msg_list(src);
 558
 559         ret = export_list_to_mbox(mlist, mbox);
 560
 561         procmsg_msg_list_free(mlist);
 562
 563         return ret;
 564 }