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