src/mbox.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 <stdio.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <fcntl.h>
  31 #include <sys/file.h>
  32 #include <ctype.h>
  33 #include <time.h>
  34
  35 #include "intl.h"
  36 #include "mbox.h"
  37 #include "procmsg.h"
  38 #include "folder.h"
  39 #include "filter.h"
  40 #include "prefs_common.h"
  41 #include "prefs_account.h"
  42 #include "account.h"
  43 #include "utils.h"
  44 #include "filtering.h"
  45
  46 #define MSGBUFSIZE      8192
  47
  48 #define FPUTS_TO_TMP_ABORT_IF_FAIL(s) \
  49 { \
  50         if (fputs(s, tmp_fp) == EOF) { \
  51                 g_warning(_("can't write to temporary file\n")); \
  52                 fclose(tmp_fp); \
  53                 fclose(mbox_fp); \
  54                 unlink(tmp_file); \
  55                 g_free(tmp_file); \
  56                 return -1; \
  57         } \
  58 }
  59
  60 gint proc_mbox(FolderItem *dest, const gchar *mbox, GHashTable *folder_table)
  61 {
  62         FILE *mbox_fp;
  63         gchar buf[MSGBUFSIZE], from_line[MSGBUFSIZE];
  64         gchar *tmp_file;
  65         gint msgs = 0;
  66         FolderItem *inbox;
  67
  68         g_return_val_if_fail(dest != NULL, -1);
  69         g_return_val_if_fail(mbox != NULL, -1);
  70
  71         debug_print(_("Getting messages from %s into %s...\n"), mbox, dest->path);
  72
  73         if ((mbox_fp = fopen(mbox, "rb")) == NULL) {
  74                 FILE_OP_ERROR(mbox, "fopen");
  75                 return -1;
  76         }
  77
  78         /* ignore empty lines on the head */
  79         do {
  80                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  81                         g_warning(_("can't read mbox file.\n"));
  82                         fclose(mbox_fp);
  83                         return -1;
  84                 }
  85         } while (buf[0] == '\n' || buf[0] == '\r');
  86
  87         if (strncmp(buf, "From ", 5) != 0) {
  88                 g_warning(_("invalid mbox format: %s\n"), mbox);
  89                 fclose(mbox_fp);
  90                 return -1;
  91         }
  92
  93         strcpy(from_line, buf);
  94         if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
  95                 g_warning(_("malformed mbox: %s\n"), mbox);
  96                 fclose(mbox_fp);
  97                 return -1;
  98         }
  99
 100         tmp_file = get_tmp_file();
 101         inbox    = folder_get_default_inbox();
 102
 103         do {
 104                 FILE *tmp_fp;
 105                 FolderItem *dropfolder;
 106                 gint empty_line;
 107                 gint val;
 108                 gboolean is_next_msg = FALSE;
 109                 gint msgnum;
 110
 111                 if ((tmp_fp = fopen(tmp_file, "wb")) == NULL) {
 112                         FILE_OP_ERROR(tmp_file, "fopen");
 113                         g_warning(_("can't open temporary file\n"));
 114                         fclose(mbox_fp);
 115                         g_free(tmp_file);
 116                         return -1;
 117                 }
 118                 if (change_file_mode_rw(tmp_fp, tmp_file) < 0)
 119                         FILE_OP_ERROR(tmp_file, "chmod");
 120
 121                 /* convert unix From into Return-Path */
 122                 /*
 123                 startp = from_line + 5;
 124                 endp = strchr(startp, ' ');
 125                 if (endp == NULL)
 126                         rpath = g_strdup(startp);
 127                 else
 128                         rpath = g_strndup(startp, endp - startp);
 129                 g_strstrip(rpath);
 130                 g_snprintf(from_line, sizeof(from_line),
 131                            "Return-Path: %s\n", rpath);
 132                 g_free(rpath);
 133                 */
 134
 135                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 136                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 137                 from_line[0] = '\0';
 138
 139                 empty_line = 0;
 140
 141                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 142                         if (buf[0] == '\n' || buf[0] == '\r') {
 143                                 empty_line++;
 144                                 buf[0] = '\0';
 145                                 continue;
 146                         }
 147
 148                         /* From separator */
 149                         while (!strncmp(buf, "From ", 5)) {
 150                                 strcpy(from_line, buf);
 151                                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 152                                         buf[0] = '\0';
 153                                         break;
 154                                 }
 155
 156                                 if (is_header_line(buf)) {
 157                                         is_next_msg = TRUE;
 158                                         break;
 159                                 } else if (!strncmp(buf, "From ", 5)) {
 160                                         continue;
 161                                 } else if (!strncmp(buf, ">From ", 6)) {
 162                                         g_memmove(buf, buf + 1, strlen(buf));
 163                                         is_next_msg = TRUE;
 164                                         break;
 165                                 } else {
 166                                         g_warning(_("unescaped From found:\n%s"),
 167                                                   from_line);
 168                                         break;
 169                                 }
 170                         }
 171                         if (is_next_msg) break;
 172
 173                         if (empty_line > 0) {
 174                                 while (empty_line--)
 175                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 176                                 empty_line = 0;
 177                         }
 178
 179                         if (from_line[0] != '\0') {
 180                                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 181                                 from_line[0] = '\0';
 182                         }
 183
 184                         if (buf[0] != '\0') {
 185                                 if (!strncmp(buf, ">From ", 6)) {
 186                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 187                                 } else
 188                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 189
 190                                 buf[0] = '\0';
 191                         }
 192                 }
 193
 194                 if (empty_line > 0) {
 195                         while (--empty_line)
 196                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 197                 }
 198
 199                 if (fclose(tmp_fp) == EOF) {
 200                         FILE_OP_ERROR(tmp_file, "fclose");
 201                         g_warning(_("can't write to temporary file\n"));
 202                         fclose(mbox_fp);
 203                         unlink(tmp_file);
 204                         g_free(tmp_file);
 205                         return -1;
 206                 }
 207
 208                 if (folder_table) {
 209                         if (global_processing == NULL) {
 210                                 /* old filtering */
 211                                 dropfolder = filter_get_dest_folder
 212                                         (prefs_common.fltlist, tmp_file);
 213                                 if (!dropfolder ||
 214                                     !strcmp(dropfolder->path, FILTER_NOT_RECEIVE))
 215                                         dropfolder = dest;
 216                                 val = GPOINTER_TO_INT(g_hash_table_lookup
 217                                                       (folder_table, dropfolder));
 218                                 if (val == 0) {
 219                                         g_hash_table_insert(folder_table, dropfolder,
 220                                                             GINT_TO_POINTER(1));
 221                                 }
 222                         }
 223                         else {
 224                                 /* CLAWS: new filtering */
 225                                 dropfolder = folder_get_default_processing();
 226                         }
 227                 } else
 228                         dropfolder = dest;
 229
 230
 231                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, TRUE)) < 0) {
 232                         fclose(mbox_fp);
 233                         unlink(tmp_file);
 234                         g_free(tmp_file);
 235                         return -1;
 236                 }
 237
 238                 if (global_processing) {
 239                         /* CLAWS: new filtering */
 240                         if (folder_table) {
 241                                 filter_message(global_processing, inbox,
 242                                                msgnum, folder_table);
 243                         }
 244                 }
 245
 246                 msgs++;
 247         } while (from_line[0] != '\0');
 248
 249         g_free(tmp_file);
 250         fclose(mbox_fp);
 251         debug_print(_("%d messages found.\n"), msgs);
 252
 253         return msgs;
 254 }
 255
 256 gint lock_mbox(const gchar *base, LockType type)
 257 {
 258         gint retval = 0;
 259
 260         if (type == LOCK_FILE) {
 261                 gchar *lockfile, *locklink;
 262                 gint retry = 0;
 263                 FILE *lockfp;
 264
 265                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 266                 if ((lockfp = fopen(lockfile, "wb")) == NULL) {
 267                         FILE_OP_ERROR(lockfile, "fopen");
 268                         g_warning(_("can't create lock file %s\n"), lockfile);
 269                         g_warning(_("use 'flock' instead of 'file' if possible.\n"));
 270                         g_free(lockfile);
 271                         return -1;
 272                 }
 273
 274                 fprintf(lockfp, "%d\n", getpid());
 275                 fclose(lockfp);
 276
 277                 locklink = g_strconcat(base, ".lock", NULL);
 278                 while (link(lockfile, locklink) < 0) {
 279                         FILE_OP_ERROR(lockfile, "link");
 280                         if (retry >= 5) {
 281                                 g_warning(_("can't create %s\n"), lockfile);
 282                                 unlink(lockfile);
 283                                 g_free(lockfile);
 284                                 return -1;
 285                         }
 286                         if (retry == 0)
 287                                 g_warning(_("mailbox is owned by another"
 288                                             " process, waiting...\n"));
 289                         retry++;
 290                         sleep(5);
 291                 }
 292                 unlink(lockfile);
 293                 g_free(lockfile);
 294         } else if (type == LOCK_FLOCK) {
 295                 gint lockfd;
 296
 297 #if HAVE_FLOCK
 298                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 299 #else
 300                 if ((lockfd = open(base, O_RDWR)) < 0) {
 301 #endif
 302                         FILE_OP_ERROR(base, "open");
 303                         return -1;
 304                 }
 305 #if HAVE_FLOCK
 306                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 307                         perror("flock");
 308 #else
 309 #if HAVE_LOCKF
 310                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 311                         perror("lockf");
 312 #else
 313                 {
 314 #endif
 315 #endif /* HAVE_FLOCK */
 316                         g_warning(_("can't lock %s\n"), base);
 317                         if (close(lockfd) < 0)
 318                                 perror("close");
 319                         return -1;
 320                 }
 321                 retval = lockfd;
 322         } else {
 323                 g_warning(_("invalid lock type\n"));
 324                 return -1;
 325         }
 326
 327         return retval;
 328 }
 329
 330 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 331 {
 332         if (type == LOCK_FILE) {
 333                 gchar *lockfile;
 334
 335                 lockfile = g_strconcat(base, ".lock", NULL);
 336                 if (unlink(lockfile) < 0) {
 337                         FILE_OP_ERROR(lockfile, "unlink");
 338                         g_free(lockfile);
 339                         return -1;
 340                 }
 341                 g_free(lockfile);
 342
 343                 return 0;
 344         } else if (type == LOCK_FLOCK) {
 345 #if HAVE_FLOCK
 346                 if (flock(fd, LOCK_UN) < 0) {
 347                         perror("flock");
 348 #else
 349 #if HAVE_LOCKF
 350                 if (lockf(fd, F_ULOCK, 0) < 0) {
 351                         perror("lockf");
 352 #else
 353                 {
 354 #endif
 355 #endif /* HAVE_FLOCK */
 356                         g_warning(_("can't unlock %s\n"), base);
 357                         if (close(fd) < 0)
 358                                 perror("close");
 359                         return -1;
 360                 }
 361
 362                 if (close(fd) < 0) {
 363                         perror("close");
 364                         return -1;
 365                 }
 366
 367                 return 0;
 368         }
 369
 370         g_warning(_("invalid lock type\n"));
 371         return -1;
 372 }
 373
 374 gint copy_mbox(const gchar *src, const gchar *dest)
 375 {
 376         return copy_file(src, dest, TRUE);
 377 }
 378
 379 void empty_mbox(const gchar *mbox)
 380 {
 381         if (truncate(mbox, 0) < 0) {
 382                 FILE *fp;
 383
 384                 FILE_OP_ERROR(mbox, "truncate");
 385                 if ((fp = fopen(mbox, "wb")) == NULL) {
 386                         FILE_OP_ERROR(mbox, "fopen");
 387                         g_warning(_("can't truncate mailbox to zero.\n"));
 388                         return;
 389                 }
 390                 fclose(fp);
 391         }
 392 }
 393
 394 /* read all messages in SRC, and store them into one MBOX file. */
 395 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 396 {
 397         GSList *mlist;
 398         GSList *cur;
 399         MsgInfo *msginfo;
 400         FILE *msg_fp;
 401         FILE *mbox_fp;
 402         gchar buf[BUFFSIZE];
 403
 404         g_return_val_if_fail(src != NULL, -1);
 405         g_return_val_if_fail(src->folder != NULL, -1);
 406         g_return_val_if_fail(mbox != NULL, -1);
 407
 408         debug_print(_("Exporting messages from %s into %s...\n"),
 409                     src->path, mbox);
 410
 411         if ((mbox_fp = fopen(mbox, "wb")) == NULL) {
 412                 FILE_OP_ERROR(mbox, "fopen");
 413                 return -1;
 414         }
 415
 416         mlist = folder_item_get_msg_list(src);
 417
 418         for (cur = mlist; cur != NULL; cur = cur->next) {
 419                 msginfo = (MsgInfo *)cur->data;
 420
 421                 msg_fp = procmsg_open_message(msginfo);
 422                 if (!msg_fp) {
 423                         procmsg_msginfo_free(msginfo);
 424                         continue;
 425                 }
 426
 427                 strncpy2(buf,
 428                          msginfo->from ? msginfo->from :
 429                          cur_account && cur_account->address ?
 430                          cur_account->address : "unknown",
 431                          sizeof(buf));
 432                 extract_address(buf);
 433
 434                 fprintf(mbox_fp, "From %s %s",
 435                         buf, ctime(&msginfo->date_t));
 436
 437                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 438                         if (!strncmp(buf, "From ", 5))
 439                                 fputc('>', mbox_fp);
 440                         fputs(buf, mbox_fp);
 441                 }
 442                 fputc('\n', mbox_fp);
 443
 444                 fclose(msg_fp);
 445                 procmsg_msginfo_free(msginfo);
 446         }
 447
 448         g_slist_free(mlist);
 449
 450         fclose(mbox_fp);
 451
 452         return 0;
 453 }