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)
  61 {
  62         FILE *mbox_fp;
  63         gchar buf[MSGBUFSIZE], from_line[MSGBUFSIZE];
  64         gchar *tmp_file;
  65         gint msgs = 0;
  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
 101         do {
 102                 FILE *tmp_fp;
 103                 FolderItem *dropfolder;
 104                 gint empty_line;
 105                 gint val;
 106                 gboolean is_next_msg = FALSE;
 107                 gint msgnum;
 108
 109                 if ((tmp_fp = fopen(tmp_file, "wb")) == NULL) {
 110                         FILE_OP_ERROR(tmp_file, "fopen");
 111                         g_warning(_("can't open temporary file\n"));
 112                         fclose(mbox_fp);
 113                         g_free(tmp_file);
 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                         g_free(tmp_file);
 203                         return -1;
 204                 }
 205
 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                 } else {
 214                         /* CLAWS: new filtering */
 215                         dropfolder = folder_get_default_processing();
 216                 }
 217
 218
 219                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, TRUE)) < 0) {
 220                         fclose(mbox_fp);
 221                         unlink(tmp_file);
 222                         g_free(tmp_file);
 223                         return -1;
 224                 }
 225
 226                 if (global_processing) {
 227                         /* CLAWS: new filtering */
 228                         filter_message(global_processing, dest,
 229                                        msgnum);
 230                 }
 231
 232                 msgs++;
 233         } while (from_line[0] != '\0');
 234
 235         g_free(tmp_file);
 236         fclose(mbox_fp);
 237         debug_print("%d messages found.\n", msgs);
 238
 239         return msgs;
 240 }
 241
 242 gint lock_mbox(const gchar *base, LockType type)
 243 {
 244         gint retval = 0;
 245
 246         if (type == LOCK_FILE) {
 247                 gchar *lockfile, *locklink;
 248                 gint retry = 0;
 249                 FILE *lockfp;
 250
 251                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 252                 if ((lockfp = fopen(lockfile, "wb")) == NULL) {
 253                         FILE_OP_ERROR(lockfile, "fopen");
 254                         g_warning(_("can't create lock file %s\n"), lockfile);
 255                         g_warning(_("use 'flock' instead of 'file' if possible.\n"));
 256                         g_free(lockfile);
 257                         return -1;
 258                 }
 259
 260                 fprintf(lockfp, "%d\n", getpid());
 261                 fclose(lockfp);
 262
 263                 locklink = g_strconcat(base, ".lock", NULL);
 264                 while (link(lockfile, locklink) < 0) {
 265                         FILE_OP_ERROR(lockfile, "link");
 266                         if (retry >= 5) {
 267                                 g_warning(_("can't create %s\n"), lockfile);
 268                                 unlink(lockfile);
 269                                 g_free(lockfile);
 270                                 return -1;
 271                         }
 272                         if (retry == 0)
 273                                 g_warning(_("mailbox is owned by another"
 274                                             " process, waiting...\n"));
 275                         retry++;
 276                         sleep(5);
 277                 }
 278                 unlink(lockfile);
 279                 g_free(lockfile);
 280         } else if (type == LOCK_FLOCK) {
 281                 gint lockfd;
 282
 283 #if HAVE_FLOCK
 284                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 285 #else
 286                 if ((lockfd = open(base, O_RDWR)) < 0) {
 287 #endif
 288                         FILE_OP_ERROR(base, "open");
 289                         return -1;
 290                 }
 291 #if HAVE_FLOCK
 292                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 293                         perror("flock");
 294 #else
 295 #if HAVE_LOCKF
 296                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 297                         perror("lockf");
 298 #else
 299                 {
 300 #endif
 301 #endif /* HAVE_FLOCK */
 302                         g_warning(_("can't lock %s\n"), base);
 303                         if (close(lockfd) < 0)
 304                                 perror("close");
 305                         return -1;
 306                 }
 307                 retval = lockfd;
 308         } else {
 309                 g_warning(_("invalid lock type\n"));
 310                 return -1;
 311         }
 312
 313         return retval;
 314 }
 315
 316 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 317 {
 318         if (type == LOCK_FILE) {
 319                 gchar *lockfile;
 320
 321                 lockfile = g_strconcat(base, ".lock", NULL);
 322                 if (unlink(lockfile) < 0) {
 323                         FILE_OP_ERROR(lockfile, "unlink");
 324                         g_free(lockfile);
 325                         return -1;
 326                 }
 327                 g_free(lockfile);
 328
 329                 return 0;
 330         } else if (type == LOCK_FLOCK) {
 331 #if HAVE_FLOCK
 332                 if (flock(fd, LOCK_UN) < 0) {
 333                         perror("flock");
 334 #else
 335 #if HAVE_LOCKF
 336                 if (lockf(fd, F_ULOCK, 0) < 0) {
 337                         perror("lockf");
 338 #else
 339                 {
 340 #endif
 341 #endif /* HAVE_FLOCK */
 342                         g_warning(_("can't unlock %s\n"), base);
 343                         if (close(fd) < 0)
 344                                 perror("close");
 345                         return -1;
 346                 }
 347
 348                 if (close(fd) < 0) {
 349                         perror("close");
 350                         return -1;
 351                 }
 352
 353                 return 0;
 354         }
 355
 356         g_warning(_("invalid lock type\n"));
 357         return -1;
 358 }
 359
 360 gint copy_mbox(const gchar *src, const gchar *dest)
 361 {
 362         return copy_file(src, dest, TRUE);
 363 }
 364
 365 void empty_mbox(const gchar *mbox)
 366 {
 367         if (truncate(mbox, 0) < 0) {
 368                 FILE *fp;
 369
 370                 FILE_OP_ERROR(mbox, "truncate");
 371                 if ((fp = fopen(mbox, "wb")) == NULL) {
 372                         FILE_OP_ERROR(mbox, "fopen");
 373                         g_warning(_("can't truncate mailbox to zero.\n"));
 374                         return;
 375                 }
 376                 fclose(fp);
 377         }
 378 }
 379
 380 /* read all messages in SRC, and store them into one MBOX file. */
 381 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 382 {
 383         GSList *mlist;
 384         GSList *cur;
 385         MsgInfo *msginfo;
 386         FILE *msg_fp;
 387         FILE *mbox_fp;
 388         gchar buf[BUFFSIZE];
 389
 390         g_return_val_if_fail(src != NULL, -1);
 391         g_return_val_if_fail(src->folder != NULL, -1);
 392         g_return_val_if_fail(mbox != NULL, -1);
 393
 394         debug_print("Exporting messages from %s into %s...\n",
 395                     src->path, mbox);
 396
 397         if ((mbox_fp = fopen(mbox, "wb")) == NULL) {
 398                 FILE_OP_ERROR(mbox, "fopen");
 399                 return -1;
 400         }
 401
 402         mlist = folder_item_get_msg_list(src);
 403
 404         for (cur = mlist; cur != NULL; cur = cur->next) {
 405                 msginfo = (MsgInfo *)cur->data;
 406
 407                 msg_fp = procmsg_open_message(msginfo);
 408                 if (!msg_fp) {
 409                         procmsg_msginfo_free(msginfo);
 410                         continue;
 411                 }
 412
 413                 strncpy2(buf,
 414                          msginfo->from ? msginfo->from :
 415                          cur_account && cur_account->address ?
 416                          cur_account->address : "unknown",
 417                          sizeof(buf));
 418                 extract_address(buf);
 419
 420                 fprintf(mbox_fp, "From %s %s",
 421                         buf, ctime(&msginfo->date_t));
 422
 423                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 424                         if (!strncmp(buf, "From ", 5))
 425                                 fputc('>', mbox_fp);
 426                         fputs(buf, mbox_fp);
 427                 }
 428                 fputc('\n', mbox_fp);
 429
 430                 fclose(msg_fp);
 431                 procmsg_msginfo_free(msginfo);
 432         }
 433
 434         g_slist_free(mlist);
 435
 436         fclose(mbox_fp);
 437
 438         return 0;
 439 }