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                 /*
 120                 startp = from_line + 5;
 121                 endp = strchr(startp, ' ');
 122                 if (endp == NULL)
 123                         rpath = g_strdup(startp);
 124                 else
 125                         rpath = g_strndup(startp, endp - startp);
 126                 g_strstrip(rpath);
 127                 g_snprintf(from_line, sizeof(from_line),
 128                            "Return-Path: %s\n", rpath);
 129                 g_free(rpath);
 130                 */
 131
 132                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 133                 FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 134                 from_line[0] = '\0';
 135
 136                 empty_line = 0;
 137
 138                 while (fgets(buf, sizeof(buf), mbox_fp) != NULL) {
 139                         if (buf[0] == '\n' || buf[0] == '\r') {
 140                                 empty_line++;
 141                                 buf[0] = '\0';
 142                                 continue;
 143                         }
 144
 145                         /* From separator */
 146                         while (!strncmp(buf, "From ", 5)) {
 147                                 strcpy(from_line, buf);
 148                                 if (fgets(buf, sizeof(buf), mbox_fp) == NULL) {
 149                                         buf[0] = '\0';
 150                                         break;
 151                                 }
 152
 153                                 if (is_header_line(buf)) {
 154                                         is_next_msg = TRUE;
 155                                         break;
 156                                 } else if (!strncmp(buf, "From ", 5)) {
 157                                         continue;
 158                                 } else if (!strncmp(buf, ">From ", 6)) {
 159                                         g_memmove(buf, buf + 1, strlen(buf));
 160                                         is_next_msg = TRUE;
 161                                         break;
 162                                 } else {
 163                                         g_warning(_("unescaped From found:\n%s"),
 164                                                   from_line);
 165                                         break;
 166                                 }
 167                         }
 168                         if (is_next_msg) break;
 169
 170                         if (empty_line > 0) {
 171                                 while (empty_line--)
 172                                         FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 173                                 empty_line = 0;
 174                         }
 175
 176                         if (from_line[0] != '\0') {
 177                                 FPUTS_TO_TMP_ABORT_IF_FAIL(from_line);
 178                                 from_line[0] = '\0';
 179                         }
 180
 181                         if (buf[0] != '\0') {
 182                                 if (!strncmp(buf, ">From ", 6)) {
 183                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf + 1);
 184                                 } else
 185                                         FPUTS_TO_TMP_ABORT_IF_FAIL(buf);
 186
 187                                 buf[0] = '\0';
 188                         }
 189                 }
 190
 191                 if (empty_line > 0) {
 192                         while (--empty_line)
 193                                 FPUTS_TO_TMP_ABORT_IF_FAIL("\n");
 194                 }
 195
 196                 if (fclose(tmp_fp) == EOF) {
 197                         FILE_OP_ERROR(tmp_file, "fclose");
 198                         g_warning(_("can't write to temporary file\n"));
 199                         fclose(mbox_fp);
 200                         unlink(tmp_file);
 201                         return -1;
 202                 }
 203
 204                 if (folder_table) {
 205                         if (global_filtering == NULL) {
 206                                 /* old filtering */
 207                                 dropfolder = filter_get_dest_folder
 208                                         (prefs_common.fltlist, tmp_file);
 209                                 if (!dropfolder ||
 210                                     !strcmp(dropfolder->path, FILTER_NOT_RECEIVE))
 211                                         dropfolder = dest;
 212                                 val = GPOINTER_TO_INT(g_hash_table_lookup
 213                                                       (folder_table, dropfolder));
 214                                 if (val == 0) {
 215                                         folder_item_scan(dropfolder);
 216                                         g_hash_table_insert(folder_table, dropfolder,
 217                                                             GINT_TO_POINTER(1));
 218                                 }
 219                         }
 220                         else {
 221                                 /* new filtering */
 222                                 dropfolder = dest;
 223                         }
 224                 } else
 225                         dropfolder = dest;
 226
 227                 if ((msgnum = folder_item_add_msg(dropfolder, tmp_file, TRUE)) < 0) {
 228                         fclose(mbox_fp);
 229                         unlink(tmp_file);
 230                         return -1;
 231                 }
 232
 233                 folder_item_scan(dropfolder);
 234
 235                 if (global_filtering != NULL) {
 236                         /* new filtering */
 237                         if (folder_table) {
 238                                 filter_message(global_filtering, dropfolder,
 239                                                msgnum, folder_table);
 240                         }
 241                 }
 242
 243                 msgs++;
 244         } while (from_line[0] != '\0');
 245
 246         fclose(mbox_fp);
 247         debug_print(_("%d messages found.\n"), msgs);
 248
 249         return msgs;
 250 }
 251
 252 gint lock_mbox(const gchar *base, LockType type)
 253 {
 254         gint retval = 0;
 255
 256         if (type == LOCK_FILE) {
 257                 gchar *lockfile, *locklink;
 258                 gint retry = 0;
 259                 FILE *lockfp;
 260
 261                 lockfile = g_strdup_printf("%s.%d", base, getpid());
 262                 if ((lockfp = fopen(lockfile, "w")) == NULL) {
 263                         FILE_OP_ERROR(lockfile, "fopen");
 264                         g_warning(_("can't create lock file %s\n"), lockfile);
 265                         g_warning(_("use 'flock' instead of 'file' if possible.\n"));
 266                         g_free(lockfile);
 267                         return -1;
 268                 }
 269
 270                 fprintf(lockfp, "%d\n", getpid());
 271                 fclose(lockfp);
 272
 273                 locklink = g_strconcat(base, ".lock", NULL);
 274                 while (link(lockfile, locklink) < 0) {
 275                         FILE_OP_ERROR(lockfile, "link");
 276                         if (retry >= 5) {
 277                                 g_warning(_("can't create %s\n"), lockfile);
 278                                 unlink(lockfile);
 279                                 g_free(lockfile);
 280                                 return -1;
 281                         }
 282                         if (retry == 0)
 283                                 g_warning(_("mailbox is owned by another"
 284                                             " process, waiting...\n"));
 285                         retry++;
 286                         sleep(5);
 287                 }
 288                 unlink(lockfile);
 289                 g_free(lockfile);
 290         } else if (type == LOCK_FLOCK) {
 291                 gint lockfd;
 292
 293 #if HAVE_FLOCK
 294                 if ((lockfd = open(base, O_RDONLY)) < 0) {
 295 #else
 296                 if ((lockfd = open(base, O_RDWR)) < 0) {
 297 #endif
 298                         FILE_OP_ERROR(base, "open");
 299                         return -1;
 300                 }
 301 #if HAVE_FLOCK
 302                 if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 303                         perror("flock");
 304 #else
 305 #if HAVE_LOCKF
 306                 if (lockf(lockfd, F_TLOCK, 0) < 0) {
 307                         perror("lockf");
 308 #else
 309                 {
 310 #endif
 311 #endif /* HAVE_FLOCK */
 312                         g_warning(_("can't lock %s\n"), base);
 313                         if (close(lockfd) < 0)
 314                                 perror("close");
 315                         return -1;
 316                 }
 317                 retval = lockfd;
 318         } else {
 319                 g_warning(_("invalid lock type\n"));
 320                 return -1;
 321         }
 322
 323         return retval;
 324 }
 325
 326 gint unlock_mbox(const gchar *base, gint fd, LockType type)
 327 {
 328         if (type == LOCK_FILE) {
 329                 gchar *lockfile;
 330
 331                 lockfile = g_strconcat(base, ".lock", NULL);
 332                 if (unlink(lockfile) < 0) {
 333                         FILE_OP_ERROR(lockfile, "unlink");
 334                         g_free(lockfile);
 335                         return -1;
 336                 }
 337                 g_free(lockfile);
 338
 339                 return 0;
 340         } else if (type == LOCK_FLOCK) {
 341 #if HAVE_FLOCK
 342                 if (flock(fd, LOCK_UN) < 0) {
 343                         perror("flock");
 344 #else
 345 #if HAVE_LOCKF
 346                 if (lockf(fd, F_ULOCK, 0) < 0) {
 347                         perror("lockf");
 348 #else
 349                 {
 350 #endif
 351 #endif /* HAVE_FLOCK */
 352                         g_warning(_("can't unlock %s\n"), base);
 353                         if (close(fd) < 0)
 354                                 perror("close");
 355                         return -1;
 356                 }
 357
 358                 if (close(fd) < 0) {
 359                         perror("close");
 360                         return -1;
 361                 }
 362
 363                 return 0;
 364         }
 365
 366         g_warning(_("invalid lock type\n"));
 367         return -1;
 368 }
 369
 370 gint copy_mbox(const gchar *src, const gchar *dest)
 371 {
 372         return copy_file(src, dest);
 373 }
 374
 375 void empty_mbox(const gchar *mbox)
 376 {
 377         if (truncate(mbox, 0) < 0) {
 378                 FILE *fp;
 379
 380                 FILE_OP_ERROR(mbox, "truncate");
 381                 if ((fp = fopen(mbox, "w")) == NULL) {
 382                         FILE_OP_ERROR(mbox, "fopen");
 383                         g_warning(_("can't truncate mailbox to zero.\n"));
 384                         return;
 385                 }
 386                 fclose(fp);
 387         }
 388 }
 389
 390 /* read all messages in SRC, and store them into one MBOX file. */
 391 gint export_to_mbox(FolderItem *src, const gchar *mbox)
 392 {
 393         GSList *mlist;
 394         GSList *cur;
 395         MsgInfo *msginfo;
 396         FILE *msg_fp;
 397         FILE *mbox_fp;
 398         gchar buf[BUFFSIZE];
 399
 400         g_return_val_if_fail(src != NULL, -1);
 401         g_return_val_if_fail(src->folder != NULL, -1);
 402         g_return_val_if_fail(mbox != NULL, -1);
 403
 404         debug_print(_("Exporting messages from %s into %s...\n"),
 405                     src->path, mbox);
 406
 407         if ((mbox_fp = fopen(mbox, "w")) == NULL) {
 408                 FILE_OP_ERROR(mbox, "fopen");
 409                 return -1;
 410         }
 411
 412         mlist = src->folder->get_msg_list(src->folder, src, TRUE);
 413
 414         for (cur = mlist; cur != NULL; cur = cur->next) {
 415                 msginfo = (MsgInfo *)cur->data;
 416
 417                 msg_fp = procmsg_open_message(msginfo);
 418                 if (!msg_fp) {
 419                         procmsg_msginfo_free(msginfo);
 420                         continue;
 421                 }
 422
 423                 strncpy2(buf,
 424                          msginfo->from ? msginfo->from :
 425                          cur_account && cur_account->address ?
 426                          cur_account->address : "unknown",
 427                          sizeof(buf));
 428                 extract_address(buf);
 429
 430                 fprintf(mbox_fp, "From %s %s",
 431                         buf, ctime(&msginfo->date_t));
 432
 433                 while (fgets(buf, sizeof(buf), msg_fp) != NULL) {
 434                         if (!strncmp(buf, "From ", 5))
 435                                 fputc('>', mbox_fp);
 436                         fputs(buf, mbox_fp);
 437                 }
 438                 fputc('\n', mbox_fp);
 439
 440                 fclose(msg_fp);
 441                 procmsg_msginfo_free(msginfo);
 442         }
 443
 444         g_slist_free(mlist);
 445
 446         fclose(mbox_fp);
 447
 448         return 0;
 449 }