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