src/msgcache.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto & The Claws Mail Team
   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 3 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #define _GNU_SOURCE
  27 #include <stdio.h>
  28
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #ifdef _WIN32
  32 # include <w32lib.h>
  33 # define MAP_FAILED     ((char *) -1)
  34 #else
  35 # include <sys/mman.h>
  36 #endif
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39
  40 #include <time.h>
  41
  42 #include "msgcache.h"
  43 #include "utils.h"
  44 #include "procmsg.h"
  45 #include "codeconv.h"
  46 #include "timing.h"
  47 #include "tags.h"
  48
  49 #ifdef HAVE_FWRITE_UNLOCKED
  50 #define SC_FWRITE fwrite_unlocked
  51 #else
  52 #define SC_FWRITE fwrite
  53 #endif
  54
  55 #if G_BYTE_ORDER == G_BIG_ENDIAN
  56 #define bswap_32(x) \
  57      ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
  58       (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
  59
  60 #define MMAP_TO_GUINT32(x)      \
  61         (((x[3]&0xff)) |        \
  62          ((x[2]&0xff) << 8) |   \
  63          ((x[1]&0xff) << 16) |  \
  64          ((x[0]&0xff) << 24))
  65
  66 #define MMAP_TO_GUINT32_SWAPPED(x)      \
  67         (((x[0]&0xff)) |                \
  68          ((x[1]&0xff) << 8) |           \
  69          ((x[2]&0xff) << 16) |          \
  70          ((x[3]&0xff) << 24))
  71
  72 static gboolean msgcache_use_mmap_read = TRUE;
  73 static gboolean msgcache_use_mmap_write = FALSE;
  74
  75 #else
  76 #define bswap_32(x) (x)
  77
  78 #define MMAP_TO_GUINT32(x)      \
  79         (((x[0]&0xff)) |        \
  80          ((x[1]&0xff) << 8) |   \
  81          ((x[2]&0xff) << 16) |  \
  82          ((x[3]&0xff) << 24))
  83
  84 #define MMAP_TO_GUINT32_SWAPPED(x)      \
  85         (((x[0]&0xff)) |                \
  86          ((x[1]&0xff) << 8) |           \
  87          ((x[2]&0xff) << 16) |          \
  88          ((x[3]&0xff) << 24))
  89
  90 static gboolean msgcache_use_mmap_read = TRUE;
  91 static gboolean msgcache_use_mmap_write = FALSE;
  92 #endif
  93
  94 static gboolean swapping = TRUE;
  95
  96 typedef enum
  97 {
  98         DATA_READ,
  99         DATA_WRITE,
 100         DATA_APPEND
 101 } DataOpenMode;
 102
 103 struct _MsgCache {
 104         GHashTable      *msgnum_table;
 105         GHashTable      *msgid_table;
 106         guint            memusage;
 107         time_t           last_access;
 108 };
 109
 110 typedef struct _StringConverter StringConverter;
 111 struct _StringConverter {
 112         gchar *(*convert) (StringConverter *converter, gchar *srcstr);
 113         void   (*free)    (StringConverter *converter);
 114 };
 115
 116 typedef struct _StrdupConverter StrdupConverter;
 117 struct _StrdupConverter {
 118         StringConverter converter;
 119 };
 120
 121 typedef struct _CharsetConverter CharsetConverter;
 122 struct _CharsetConverter {
 123         StringConverter converter;
 124
 125         gchar *srccharset;
 126         gchar *dstcharset;
 127 };
 128
 129 MsgCache *msgcache_new(void)
 130 {
 131         MsgCache *cache;
 132
 133         cache = g_new0(MsgCache, 1),
 134         cache->msgnum_table = g_hash_table_new(g_int_hash, g_int_equal);
 135         cache->msgid_table = g_hash_table_new(g_str_hash, g_str_equal);
 136         cache->last_access = time(NULL);
 137
 138         return cache;
 139 }
 140
 141 static gboolean msgcache_msginfo_free_func(gpointer num, gpointer msginfo, gpointer user_data)
 142 {
 143         procmsg_msginfo_free((MsgInfo *)msginfo);
 144         return TRUE;
 145 }
 146
 147 void msgcache_destroy(MsgCache *cache)
 148 {
 149         g_return_if_fail(cache != NULL);
 150
 151         g_hash_table_foreach_remove(cache->msgnum_table, msgcache_msginfo_free_func, NULL);
 152         g_hash_table_destroy(cache->msgid_table);
 153         g_hash_table_destroy(cache->msgnum_table);
 154         g_free(cache);
 155 }
 156
 157 void msgcache_add_msg(MsgCache *cache, MsgInfo *msginfo)
 158 {
 159         MsgInfo *newmsginfo;
 160
 161         g_return_if_fail(cache != NULL);
 162         g_return_if_fail(msginfo != NULL);
 163
 164         newmsginfo = procmsg_msginfo_new_ref(msginfo);
 165         g_hash_table_insert(cache->msgnum_table, &newmsginfo->msgnum, newmsginfo);
 166         if(newmsginfo->msgid != NULL)
 167                 g_hash_table_insert(cache->msgid_table, newmsginfo->msgid, newmsginfo);
 168         cache->memusage += procmsg_msginfo_memusage(msginfo);
 169         cache->last_access = time(NULL);
 170
 171         debug_print("Cache size: %d messages, %d bytes\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 172 }
 173
 174 void msgcache_remove_msg(MsgCache *cache, guint msgnum)
 175 {
 176         MsgInfo *msginfo;
 177
 178         g_return_if_fail(cache != NULL);
 179         g_return_if_fail(msgnum > 0);
 180
 181         msginfo = (MsgInfo *) g_hash_table_lookup(cache->msgnum_table, &msgnum);
 182         if(!msginfo)
 183                 return;
 184
 185         cache->memusage -= procmsg_msginfo_memusage(msginfo);
 186         if(msginfo->msgid)
 187                 g_hash_table_remove(cache->msgid_table, msginfo->msgid);
 188         g_hash_table_remove(cache->msgnum_table, &msginfo->msgnum);
 189         procmsg_msginfo_free(msginfo);
 190         cache->last_access = time(NULL);
 191
 192         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 193 }
 194
 195 void msgcache_update_msg(MsgCache *cache, MsgInfo *msginfo)
 196 {
 197         MsgInfo *oldmsginfo, *newmsginfo;
 198
 199         g_return_if_fail(cache != NULL);
 200         g_return_if_fail(msginfo != NULL);
 201
 202         oldmsginfo = g_hash_table_lookup(cache->msgnum_table, &msginfo->msgnum);
 203         if(oldmsginfo && oldmsginfo->msgid)
 204                 g_hash_table_remove(cache->msgid_table, oldmsginfo->msgid);
 205         if (oldmsginfo) {
 206                 g_hash_table_remove(cache->msgnum_table, &oldmsginfo->msgnum);
 207                 cache->memusage -= procmsg_msginfo_memusage(oldmsginfo);
 208                 procmsg_msginfo_free(oldmsginfo);
 209         }
 210
 211         newmsginfo = procmsg_msginfo_new_ref(msginfo);
 212         g_hash_table_insert(cache->msgnum_table, &newmsginfo->msgnum, newmsginfo);
 213         if(newmsginfo->msgid)
 214                 g_hash_table_insert(cache->msgid_table, newmsginfo->msgid, newmsginfo);
 215         cache->memusage += procmsg_msginfo_memusage(newmsginfo);
 216         cache->last_access = time(NULL);
 217
 218         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 219
 220         return;
 221 }
 222
 223 MsgInfo *msgcache_get_msg(MsgCache *cache, guint num)
 224 {
 225         MsgInfo *msginfo;
 226
 227         g_return_val_if_fail(cache != NULL, NULL);
 228
 229         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 230         if(!msginfo)
 231                 return NULL;
 232         cache->last_access = time(NULL);
 233
 234         return procmsg_msginfo_new_ref(msginfo);
 235 }
 236
 237 MsgInfo *msgcache_get_msg_by_id(MsgCache *cache, const gchar *msgid)
 238 {
 239         MsgInfo *msginfo;
 240
 241         g_return_val_if_fail(cache != NULL, NULL);
 242         g_return_val_if_fail(msgid != NULL, NULL);
 243
 244         msginfo = g_hash_table_lookup(cache->msgid_table, msgid);
 245         if(!msginfo)
 246                 return NULL;
 247         cache->last_access = time(NULL);
 248
 249         return procmsg_msginfo_new_ref(msginfo);
 250 }
 251
 252 static void msgcache_get_msg_list_func(gpointer key, gpointer value, gpointer user_data)
 253 {
 254         MsgInfoList **listptr = user_data;
 255         MsgInfo *msginfo = value;
 256
 257         *listptr = g_slist_prepend(*listptr, procmsg_msginfo_new_ref(msginfo));
 258 }
 259
 260 MsgInfoList *msgcache_get_msg_list(MsgCache *cache)
 261 {
 262         MsgInfoList *msg_list = NULL;
 263         START_TIMING("");
 264         g_return_val_if_fail(cache != NULL, NULL);
 265
 266         g_hash_table_foreach((GHashTable *)cache->msgnum_table, msgcache_get_msg_list_func, (gpointer)&msg_list);
 267         cache->last_access = time(NULL);
 268
 269         msg_list = g_slist_reverse(msg_list);
 270         END_TIMING();
 271         return msg_list;
 272 }
 273
 274 time_t msgcache_get_last_access_time(MsgCache *cache)
 275 {
 276         g_return_val_if_fail(cache != NULL, 0);
 277
 278         return cache->last_access;
 279 }
 280
 281 gint msgcache_get_memory_usage(MsgCache *cache)
 282 {
 283         g_return_val_if_fail(cache != NULL, 0);
 284
 285         return cache->memusage;
 286 }
 287
 288 /*
 289  *  Cache saving functions
 290  */
 291
 292 #define READ_CACHE_DATA(data, fp, total_len) \
 293 { \
 294         if ((tmp_len = msgcache_read_cache_data_str(fp, &data, conv)) < 0) { \
 295                 procmsg_msginfo_free(msginfo); \
 296                 error = TRUE; \
 297                 goto bail_err; \
 298         } \
 299         total_len += tmp_len; \
 300 }
 301
 302 #define READ_CACHE_DATA_INT(n, fp) \
 303 { \
 304         guint32 idata; \
 305         size_t ni; \
 306  \
 307         if ((ni = fread(&idata, sizeof(idata), 1, fp)) != 1) { \
 308                 g_warning("read_int: Cache data corrupted, read %d of %d at " \
 309                           "offset %ld\n", ni, sizeof(idata), ftell(fp)); \
 310                 procmsg_msginfo_free(msginfo); \
 311                 error = TRUE; \
 312                 goto bail_err; \
 313         } else \
 314                 n = swapping ? bswap_32(idata) : (idata);\
 315 }
 316
 317 #define GET_CACHE_DATA_INT(n) \
 318 { \
 319         n = (swapping ? (MMAP_TO_GUINT32_SWAPPED(walk_data)):(MMAP_TO_GUINT32(walk_data))); \
 320         walk_data += 4; rem_len -= 4;                   \
 321 }
 322
 323 #define GET_CACHE_DATA(data, total_len) \
 324 { \
 325         GET_CACHE_DATA_INT(tmp_len);    \
 326         if ((tmp_len = msgcache_get_cache_data_str(walk_data, &data, tmp_len, conv)) < 0) { \
 327                 printf("error at rem_len:%d\n", rem_len);\
 328                 procmsg_msginfo_free(msginfo); \
 329                 error = TRUE; \
 330                 goto bail_err; \
 331         } \
 332         total_len += tmp_len; \
 333         walk_data += tmp_len; rem_len -= tmp_len; \
 334 }
 335
 336
 337 #define WRITE_CACHE_DATA_INT(n, fp)                     \
 338 {                                                       \
 339         guint32 idata;                                  \
 340                                                         \
 341         idata = (guint32)bswap_32(n);                   \
 342         if (SC_FWRITE(&idata, sizeof(idata), 1, fp) != 1)       \
 343                 w_err = 1;                              \
 344         wrote += 4;                                     \
 345 }
 346
 347 #define PUT_CACHE_DATA_INT(n)                           \
 348 {                                                       \
 349         walk_data[0]=(((guint32)n)&0x000000ff);                 \
 350         walk_data[1]=(((guint32)n)&0x0000ff00)>>8;              \
 351         walk_data[2]=(((guint32)n)&0x00ff0000)>>16;             \
 352         walk_data[3]=(((guint32)n)&0xff000000)>>24;             \
 353         walk_data += 4;                                 \
 354         wrote += 4;                                     \
 355 }
 356
 357 #define WRITE_CACHE_DATA(data, fp) \
 358 { \
 359         size_t len;                                     \
 360         if (data == NULL)                               \
 361                 len = 0;                                \
 362         else                                            \
 363                 len = strlen(data);                     \
 364         WRITE_CACHE_DATA_INT(len, fp);                  \
 365         if (w_err == 0 && len > 0) {                    \
 366                 if (SC_FWRITE(data, 1, len, fp) != len) \
 367                         w_err = 1;                      \
 368                 wrote += len;                           \
 369         } \
 370 }
 371
 372 #define PUT_CACHE_DATA(data)                            \
 373 {                                                       \
 374         size_t len;                                     \
 375         if (data == NULL)                               \
 376                 len = 0;                                \
 377         else                                            \
 378                 len = strlen(data);                     \
 379         PUT_CACHE_DATA_INT(len);                        \
 380         if (len > 0) {                                  \
 381                 memcpy(walk_data, data, len);           \
 382                 walk_data += len;                       \
 383                 wrote += len;                           \
 384         }                                               \
 385 }
 386
 387 static FILE *msgcache_open_data_file(const gchar *file, guint version,
 388                                      DataOpenMode mode,
 389                                      gchar *buf, size_t buf_size)
 390 {
 391         FILE *fp;
 392         gint32 data_ver;
 393
 394         g_return_val_if_fail(file != NULL, NULL);
 395
 396         if (mode == DATA_WRITE) {
 397                 int w_err = 0, wrote = 0;
 398                 if ((fp = g_fopen(file, "wb")) == NULL) {
 399                         FILE_OP_ERROR(file, "fopen");
 400                         return NULL;
 401                 }
 402                 if (change_file_mode_rw(fp, file) < 0)
 403                         FILE_OP_ERROR(file, "chmod");
 404
 405                 WRITE_CACHE_DATA_INT(version, fp);
 406                 if (w_err != 0) {
 407                         g_warning("failed to write int\n");
 408                         fclose(fp);
 409                         return NULL;
 410                 }
 411                 return fp;
 412         }
 413
 414         /* check version */
 415         if ((fp = g_fopen(file, "rb")) == NULL)
 416                 debug_print("Mark/Cache file '%s' not found\n", file);
 417         else {
 418                 if (buf && buf_size > 0)
 419                         setvbuf(fp, buf, _IOFBF, buf_size);
 420                 if (fread(&data_ver, sizeof(data_ver), 1, fp) != 1 ||
 421                          version != bswap_32(data_ver)) {
 422                         g_message("%s: Mark/Cache version is different (%u != %u).\n",
 423                                   file, bswap_32(data_ver), version);
 424                         fclose(fp);
 425                         fp = NULL;
 426                 }
 427                 data_ver = bswap_32(data_ver);
 428         }
 429
 430         if (mode == DATA_READ)
 431                 return fp;
 432
 433         if (fp) {
 434                 /* reopen with append mode */
 435                 fclose(fp);
 436                 if ((fp = g_fopen(file, "ab")) == NULL)
 437                         FILE_OP_ERROR(file, "fopen");
 438         } else {
 439                 /* open with overwrite mode if mark file doesn't exist or
 440                    version is different */
 441                 fp = msgcache_open_data_file(file, version, DATA_WRITE, buf,
 442                                             buf_size);
 443         }
 444
 445         return fp;
 446 }
 447
 448 static gint msgcache_read_cache_data_str(FILE *fp, gchar **str,
 449                                          StringConverter *conv)
 450 {
 451         gchar *tmpstr = NULL;
 452         size_t ni;
 453         guint32 len;
 454
 455         *str = NULL;
 456         if (!swapping) {
 457                 if ((ni = fread(&len, sizeof(len), 1, fp) != 1) ||
 458                     len > G_MAXINT) {
 459                         g_warning("read_data_str: Cache data (len) corrupted, read %d "
 460                                   "of %d bytes at offset %ld\n", ni, sizeof(len),
 461                                   ftell(fp));
 462                         return -1;
 463                 }
 464         } else {
 465                 if ((ni = fread(&len, sizeof(len), 1, fp) != 1) ||
 466                     bswap_32(len) > G_MAXINT) {
 467                         g_warning("read_data_str: Cache data (len) corrupted, read %d "
 468                                   "of %d bytes at offset %ld\n", ni, sizeof(len),
 469                                   ftell(fp));
 470                         return -1;
 471                 }
 472                 len = bswap_32(len);
 473         }
 474
 475         if (len == 0)
 476                 return 0;
 477
 478         tmpstr = g_try_malloc(len + 1);
 479
 480         if(tmpstr == NULL) {
 481                 g_warning("read_data_str: can't g_malloc %d bytes - cache data probably corrupted.\n", len);
 482                 return -1;
 483         }
 484
 485         if ((ni = fread(tmpstr, 1, len, fp)) != len) {
 486                 g_warning("read_data_str: Cache data corrupted, read %d of %d "
 487                           "bytes at offset %ld\n",
 488                           ni, len, ftell(fp));
 489                 g_free(tmpstr);
 490                 return -1;
 491         }
 492         tmpstr[len] = 0;
 493
 494         if (conv != NULL) {
 495                 *str = conv->convert(conv, tmpstr);
 496                 g_free(tmpstr);
 497         } else
 498                 *str = tmpstr;
 499
 500         return len;
 501 }
 502
 503 static gint msgcache_get_cache_data_str(gchar *src, gchar **str, gint len,
 504                                          StringConverter *conv)
 505 {
 506         gchar *tmpstr = NULL;
 507
 508         *str = NULL;
 509
 510         if (len == 0)
 511                 return 0;
 512
 513         if(len > 2*1024*1024) {
 514                 g_warning("read_data_str: refusing to allocate %d bytes.\n", len);
 515                 return -1;
 516         }
 517
 518         tmpstr = g_try_malloc(len + 1);
 519
 520         if(tmpstr == NULL) {
 521                 g_warning("read_data_str: can't g_malloc %d bytes - cache data probably corrupted.\n", len);
 522                 return -1;
 523         }
 524
 525         strncpy(tmpstr, src, len);
 526
 527         tmpstr[len] = 0;
 528
 529         if (conv != NULL) {
 530                 *str = conv->convert(conv, tmpstr);
 531                 g_free(tmpstr);
 532         } else
 533                 *str = tmpstr;
 534
 535         return len;
 536 }
 537
 538 static gchar *strconv_charset_convert(StringConverter *conv, gchar *srcstr)
 539 {
 540         CharsetConverter *charsetconv = (CharsetConverter *) conv;
 541
 542         return conv_codeset_strdup(srcstr, charsetconv->srccharset, charsetconv->dstcharset);
 543 }
 544
 545 static void strconv_charset_free(StringConverter *conv)
 546 {
 547         CharsetConverter *charsetconv = (CharsetConverter *) conv;
 548
 549         g_free(charsetconv->srccharset);
 550         g_free(charsetconv->dstcharset);
 551 }
 552
 553 MsgCache *msgcache_read_cache(FolderItem *item, const gchar *cache_file)
 554 {
 555         MsgCache *cache;
 556         FILE *fp;
 557         MsgInfo *msginfo;
 558         MsgTmpFlags tmp_flags = 0;
 559         gchar file_buf[BUFFSIZE];
 560         guint32 num;
 561         guint refnum;
 562         gboolean error = FALSE;
 563         StringConverter *conv = NULL;
 564         gchar *srccharset = NULL;
 565         const gchar *dstcharset = NULL;
 566         gchar *ref = NULL;
 567         guint memusage = 0;
 568         gint tmp_len = 0, map_len = -1;
 569         char *cache_data = NULL;
 570         struct stat st;
 571
 572         g_return_val_if_fail(cache_file != NULL, NULL);
 573         g_return_val_if_fail(item != NULL, NULL);
 574
 575         swapping = TRUE;
 576
 577         /* In case we can't open the mark file with MARK_VERSION, check if we can open it with the
 578          * swapped MARK_VERSION. As msgcache_open_data_file swaps it too, if this succeeds,
 579          * it means it's the old version (not little-endian) on a big-endian machine. The code has
 580          * no effect on x86 as their file doesn't change. */
 581
 582         if ((fp = msgcache_open_data_file
 583                 (cache_file, CACHE_VERSION, DATA_READ, file_buf, sizeof(file_buf))) == NULL) {
 584                 if ((fp = msgcache_open_data_file
 585                 (cache_file, bswap_32(CACHE_VERSION), DATA_READ, file_buf, sizeof(file_buf))) == NULL)
 586                         return NULL;
 587                 else
 588                         swapping = FALSE;
 589         }
 590
 591         debug_print("\tReading %sswapped message cache from %s...\n", swapping?"":"un", cache_file);
 592
 593         if (folder_has_parent_of_type(item, F_QUEUE)) {
 594                 tmp_flags |= MSG_QUEUED;
 595         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
 596                 tmp_flags |= MSG_DRAFT;
 597         }
 598
 599         if (msgcache_read_cache_data_str(fp, &srccharset, NULL) < 0) {
 600                 fclose(fp);
 601                 return NULL;
 602         }
 603         dstcharset = CS_UTF_8;
 604         if (srccharset == NULL || dstcharset == NULL) {
 605                 conv = NULL;
 606         } else if (strcmp(srccharset, dstcharset) == 0) {
 607                 debug_print("using Noop Converter\n");
 608
 609                 conv = NULL;
 610         } else {
 611                 CharsetConverter *charsetconv;
 612
 613                 debug_print("using CharsetConverter\n");
 614
 615                 charsetconv = g_new0(CharsetConverter, 1);
 616                 charsetconv->converter.convert = strconv_charset_convert;
 617                 charsetconv->converter.free = strconv_charset_free;
 618                 charsetconv->srccharset = g_strdup(srccharset);
 619                 charsetconv->dstcharset = g_strdup(dstcharset);
 620
 621                 conv = (StringConverter *) charsetconv;
 622         }
 623         g_free(srccharset);
 624
 625         cache = msgcache_new();
 626
 627         if (msgcache_use_mmap_read == TRUE) {
 628                 if (fstat(fileno(fp), &st) >= 0)
 629                         map_len = st.st_size;
 630                 else
 631                         map_len = -1;
 632                 if (map_len > 0) {
 633 #ifdef G_OS_WIN32
 634                         cache_data = NULL;
 635                         HANDLE hFile, hMapping;
 636                         hFile = (HANDLE) _get_osfhandle (fileno(fp));
 637                         if (hFile == (HANDLE) -1)
 638                                 goto w32_fail;
 639                         hMapping = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, NULL);
 640                         if (!hMapping)
 641                                 goto w32_fail;
 642                         cache_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
 643                 w32_fail:
 644                         ;
 645 #else
 646                         cache_data = mmap(NULL, map_len, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
 647 #endif
 648                 }
 649         } else {
 650                 cache_data = NULL;
 651         }
 652         if (cache_data != NULL && cache_data != MAP_FAILED) {
 653                 int rem_len = map_len-ftell(fp);
 654                 char *walk_data = cache_data+ftell(fp);
 655
 656                 while(rem_len > 0) {
 657                         GET_CACHE_DATA_INT(num);
 658
 659                         msginfo = procmsg_msginfo_new();
 660                         msginfo->msgnum = num;
 661                         memusage += sizeof(MsgInfo);
 662
 663                         GET_CACHE_DATA_INT(msginfo->size);
 664                         GET_CACHE_DATA_INT(msginfo->mtime);
 665                         GET_CACHE_DATA_INT(msginfo->date_t);
 666                         GET_CACHE_DATA_INT(msginfo->flags.tmp_flags);
 667
 668                         GET_CACHE_DATA(msginfo->fromname, memusage);
 669
 670                         GET_CACHE_DATA(msginfo->date, memusage);
 671                         GET_CACHE_DATA(msginfo->from, memusage);
 672                         GET_CACHE_DATA(msginfo->to, memusage);
 673                         GET_CACHE_DATA(msginfo->cc, memusage);
 674                         GET_CACHE_DATA(msginfo->newsgroups, memusage);
 675                         GET_CACHE_DATA(msginfo->subject, memusage);
 676                         GET_CACHE_DATA(msginfo->msgid, memusage);
 677                         GET_CACHE_DATA(msginfo->inreplyto, memusage);
 678                         GET_CACHE_DATA(msginfo->xref, memusage);
 679
 680                         GET_CACHE_DATA_INT(msginfo->planned_download);
 681                         GET_CACHE_DATA_INT(msginfo->total_size);
 682                         GET_CACHE_DATA_INT(refnum);
 683
 684                         for (; refnum != 0; refnum--) {
 685                                 ref = NULL;
 686
 687                                 GET_CACHE_DATA(ref, memusage);
 688
 689                                 if (ref && *ref)
 690                                         msginfo->references =
 691                                                 g_slist_prepend(msginfo->references, ref);
 692                         }
 693                         if (msginfo->references)
 694                                 msginfo->references =
 695                                         g_slist_reverse(msginfo->references);
 696
 697                         msginfo->folder = item;
 698                         msginfo->flags.tmp_flags |= tmp_flags;
 699
 700                         g_hash_table_insert(cache->msgnum_table, &msginfo->msgnum, msginfo);
 701                         if(msginfo->msgid)
 702                                 g_hash_table_insert(cache->msgid_table, msginfo->msgid, msginfo);
 703                 }
 704
 705 #ifdef G_OS_WIN32
 706                 UnmapViewOfFile((void*) cache_data);
 707 #else
 708                 munmap(cache_data, map_len);
 709 #endif
 710         } else {
 711                 while (fread(&num, sizeof(num), 1, fp) == 1) {
 712                         if (swapping)
 713                                 num = bswap_32(num);
 714
 715                         msginfo = procmsg_msginfo_new();
 716                         msginfo->msgnum = num;
 717                         memusage += sizeof(MsgInfo);
 718
 719                         READ_CACHE_DATA_INT(msginfo->size, fp);
 720                         READ_CACHE_DATA_INT(msginfo->mtime, fp);
 721                         READ_CACHE_DATA_INT(msginfo->date_t, fp);
 722                         READ_CACHE_DATA_INT(msginfo->flags.tmp_flags, fp);
 723
 724                         READ_CACHE_DATA(msginfo->fromname, fp, memusage);
 725
 726                         READ_CACHE_DATA(msginfo->date, fp, memusage);
 727                         READ_CACHE_DATA(msginfo->from, fp, memusage);
 728                         READ_CACHE_DATA(msginfo->to, fp, memusage);
 729                         READ_CACHE_DATA(msginfo->cc, fp, memusage);
 730                         READ_CACHE_DATA(msginfo->newsgroups, fp, memusage);
 731                         READ_CACHE_DATA(msginfo->subject, fp, memusage);
 732                         READ_CACHE_DATA(msginfo->msgid, fp, memusage);
 733                         READ_CACHE_DATA(msginfo->inreplyto, fp, memusage);
 734                         READ_CACHE_DATA(msginfo->xref, fp, memusage);
 735
 736                         READ_CACHE_DATA_INT(msginfo->planned_download, fp);
 737                         READ_CACHE_DATA_INT(msginfo->total_size, fp);
 738                         READ_CACHE_DATA_INT(refnum, fp);
 739
 740                         for (; refnum != 0; refnum--) {
 741                                 ref = NULL;
 742
 743                                 READ_CACHE_DATA(ref, fp, memusage);
 744
 745                                 if (ref && *ref)
 746                                         msginfo->references =
 747                                                 g_slist_prepend(msginfo->references, ref);
 748                         }
 749                         if (msginfo->references)
 750                                 msginfo->references =
 751                                         g_slist_reverse(msginfo->references);
 752
 753                         msginfo->folder = item;
 754                         msginfo->flags.tmp_flags |= tmp_flags;
 755
 756                         g_hash_table_insert(cache->msgnum_table, &msginfo->msgnum, msginfo);
 757                         if(msginfo->msgid)
 758                                 g_hash_table_insert(cache->msgid_table, msginfo->msgid, msginfo);
 759                 }
 760         }
 761 bail_err:
 762         fclose(fp);
 763
 764         if (conv != NULL) {
 765                 if (conv->free != NULL)
 766                         conv->free(conv);
 767                 g_free(conv);
 768         }
 769
 770         if(error) {
 771                 msgcache_destroy(cache);
 772                 return NULL;
 773         }
 774
 775         cache->last_access = time(NULL);
 776         cache->memusage = memusage;
 777
 778         debug_print("done. (%d items read)\n", g_hash_table_size(cache->msgnum_table));
 779         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 780         return cache;
 781 }
 782
 783 void msgcache_read_mark(MsgCache *cache, const gchar *mark_file)
 784 {
 785         FILE *fp;
 786         MsgInfo *msginfo;
 787         MsgPermFlags perm_flags;
 788         guint32 num;
 789         gint map_len = -1;
 790         char *cache_data = NULL;
 791         struct stat st;
 792
 793         swapping = TRUE;
 794
 795         /* In case we can't open the mark file with MARK_VERSION, check if we can open it with the
 796          * swapped MARK_VERSION. As msgcache_open_data_file swaps it too, if this succeeds,
 797          * it means it's the old version (not little-endian) on a big-endian machine. The code has
 798          * no effect on x86 as their file doesn't change. */
 799
 800         if ((fp = msgcache_open_data_file(mark_file, MARK_VERSION, DATA_READ, NULL, 0)) == NULL) {
 801                 /* see if it isn't swapped ? */
 802                 if ((fp = msgcache_open_data_file(mark_file, bswap_32(MARK_VERSION), DATA_READ, NULL, 0)) == NULL)
 803                         return;
 804                 else
 805                         swapping = FALSE; /* yay */
 806         }
 807         debug_print("reading %sswapped mark file.\n", swapping?"":"un");
 808
 809         if (msgcache_use_mmap_read) {
 810                 if (fstat(fileno(fp), &st) >= 0)
 811                         map_len = st.st_size;
 812                 else
 813                         map_len = -1;
 814                 if (map_len > 0) {
 815 #ifdef G_OS_WIN32
 816                         cache_data = NULL;
 817                         HANDLE hFile, hMapping;
 818                         hFile = (HANDLE) _get_osfhandle (fileno(fp));
 819                         if (hFile == (HANDLE) -1)
 820                                 goto w32_fail2;
 821                         hMapping = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, NULL);
 822                         if (!hMapping)
 823                                 goto w32_fail2;
 824                         cache_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
 825                 w32_fail2:
 826                         ;
 827 #else
 828                         cache_data = mmap(NULL, map_len, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
 829 #endif
 830                 }
 831         } else {
 832                 cache_data = NULL;
 833         }
 834         if (cache_data != NULL && cache_data != MAP_FAILED) {
 835                 int rem_len = map_len-ftell(fp);
 836                 char *walk_data = cache_data+ftell(fp);
 837
 838                 while(rem_len > 0) {
 839                         GET_CACHE_DATA_INT(num);
 840                         GET_CACHE_DATA_INT(perm_flags);
 841                         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 842                         if(msginfo) {
 843                                 msginfo->flags.perm_flags = perm_flags;
 844                         }
 845                 }
 846 #ifdef G_OS_WIN32
 847                 UnmapViewOfFile((void*) cache_data);
 848 #else
 849                 munmap(cache_data, map_len);
 850 #endif
 851         } else {
 852                 while (fread(&num, sizeof(num), 1, fp) == 1) {
 853                         if (swapping)
 854                                 num = bswap_32(num);
 855                         if (fread(&perm_flags, sizeof(perm_flags), 1, fp) != 1) break;
 856                         if (swapping)
 857                                 perm_flags = bswap_32(perm_flags);
 858                         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 859                         if(msginfo) {
 860                                 msginfo->flags.perm_flags = perm_flags;
 861                         }
 862                 }
 863         }
 864         fclose(fp);
 865 }
 866
 867 void msgcache_read_tags(MsgCache *cache, const gchar *tags_file)
 868 {
 869         FILE *fp;
 870         MsgInfo *msginfo;
 871         guint32 num;
 872         gint map_len = -1;
 873         char *cache_data = NULL;
 874         struct stat st;
 875
 876         swapping = TRUE;
 877
 878         /* In case we can't open the mark file with MARK_VERSION, check if we can open it with the
 879          * swapped MARK_VERSION. As msgcache_open_data_file swaps it too, if this succeeds,
 880          * it means it's the old version (not little-endian) on a big-endian machine. The code has
 881          * no effect on x86 as their file doesn't change. */
 882
 883         if ((fp = msgcache_open_data_file(tags_file, TAGS_VERSION, DATA_READ, NULL, 0)) == NULL) {
 884                 /* see if it isn't swapped ? */
 885                 if ((fp = msgcache_open_data_file(tags_file, bswap_32(TAGS_VERSION), DATA_READ, NULL, 0)) == NULL)
 886                         return;
 887                 else
 888                         swapping = FALSE; /* yay */
 889         }
 890         debug_print("reading %sswapped tags file.\n", swapping?"":"un");
 891
 892         if (msgcache_use_mmap_read) {
 893                 if (fstat(fileno(fp), &st) >= 0)
 894                         map_len = st.st_size;
 895                 else
 896                         map_len = -1;
 897                 if (map_len > 0) {
 898 #ifdef G_OS_WIN32
 899                         cache_data = NULL;
 900                         HANDLE hFile, hMapping;
 901                         hFile = (HANDLE) _get_osfhandle (fileno(fp));
 902                         if (hFile == (HANDLE) -1)
 903                                 goto w32_fail6;
 904                         hMapping = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, NULL);
 905                         if (!hMapping)
 906                                 goto w32_fail6;
 907                         cache_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
 908                 w32_fail6:
 909                         ;
 910 #else
 911                         cache_data = mmap(NULL, map_len, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
 912 #endif
 913                 }
 914         } else {
 915                 cache_data = NULL;
 916         }
 917         if (cache_data != NULL && cache_data != MAP_FAILED) {
 918                 int rem_len = map_len-ftell(fp);
 919                 char *walk_data = cache_data+ftell(fp);
 920
 921                 while(rem_len > 0) {
 922                         gint id = -1;
 923                         GET_CACHE_DATA_INT(num);
 924                         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 925                         if(msginfo) {
 926                                 g_slist_free(msginfo->tags);
 927                                 msginfo->tags = NULL;
 928                                 do {
 929                                         GET_CACHE_DATA_INT(id);
 930                                         if (id > 0) {
 931                                                 msginfo->tags = g_slist_prepend(
 932                                                         msginfo->tags,
 933                                                         GINT_TO_POINTER(id));
 934                                         }
 935                                 } while (id > 0);
 936                                 msginfo->tags = g_slist_reverse(msginfo->tags);
 937                         }
 938                 }
 939 #ifdef G_OS_WIN32
 940                 UnmapViewOfFile((void*) cache_data);
 941 #else
 942                 munmap(cache_data, map_len);
 943 #endif
 944         } else {
 945                 while (fread(&num, sizeof(num), 1, fp) == 1) {
 946                         gint id = -1;
 947                         if (swapping)
 948                                 num = bswap_32(num);
 949                         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 950                         if(msginfo) {
 951                                 g_slist_free(msginfo->tags);
 952                                 msginfo->tags = NULL;
 953                                 do {
 954                                         if (fread(&id, sizeof(id), 1, fp) != 1)
 955                                                 id = -1;
 956                                         if (swapping)
 957                                                 id = bswap_32(id);
 958                                         if (id > 0) {
 959                                                 msginfo->tags = g_slist_prepend(
 960                                                         msginfo->tags,
 961                                                         GINT_TO_POINTER(id));
 962                                         }
 963                                 } while (id > 0);
 964                                 msginfo->tags = g_slist_reverse(msginfo->tags);
 965                         }
 966                 }
 967         }
 968         fclose(fp);
 969 }
 970
 971 static int msgcache_write_cache(MsgInfo *msginfo, FILE *fp)
 972 {
 973         MsgTmpFlags flags = msginfo->flags.tmp_flags & MSG_CACHED_FLAG_MASK;
 974         GSList *cur;
 975         int w_err = 0, wrote = 0;
 976
 977         WRITE_CACHE_DATA_INT(msginfo->msgnum, fp);
 978         WRITE_CACHE_DATA_INT(msginfo->size, fp);
 979         WRITE_CACHE_DATA_INT(msginfo->mtime, fp);
 980         WRITE_CACHE_DATA_INT(msginfo->date_t, fp);
 981         WRITE_CACHE_DATA_INT(flags, fp);
 982
 983         WRITE_CACHE_DATA(msginfo->fromname, fp);
 984
 985         WRITE_CACHE_DATA(msginfo->date, fp);
 986         WRITE_CACHE_DATA(msginfo->from, fp);
 987         WRITE_CACHE_DATA(msginfo->to, fp);
 988         WRITE_CACHE_DATA(msginfo->cc, fp);
 989         WRITE_CACHE_DATA(msginfo->newsgroups, fp);
 990         WRITE_CACHE_DATA(msginfo->subject, fp);
 991         WRITE_CACHE_DATA(msginfo->msgid, fp);
 992         WRITE_CACHE_DATA(msginfo->inreplyto, fp);
 993         WRITE_CACHE_DATA(msginfo->xref, fp);
 994         WRITE_CACHE_DATA_INT(msginfo->planned_download, fp);
 995         WRITE_CACHE_DATA_INT(msginfo->total_size, fp);
 996
 997         WRITE_CACHE_DATA_INT(g_slist_length(msginfo->references), fp);
 998
 999         for (cur = msginfo->references; cur != NULL; cur = cur->next) {
1000                 WRITE_CACHE_DATA((gchar *)cur->data, fp);
1001         }
1002         return w_err ? -1 : wrote;
1003 }
1004
1005 static int msgcache_write_mmap_cache(MsgInfo *msginfo, char *walk_data)
1006 {
1007         MsgTmpFlags flags = msginfo->flags.tmp_flags & MSG_CACHED_FLAG_MASK;
1008         GSList *cur;
1009         int wrote = 0;
1010
1011         PUT_CACHE_DATA_INT(msginfo->msgnum);
1012         PUT_CACHE_DATA_INT(msginfo->size);
1013         PUT_CACHE_DATA_INT(msginfo->mtime);
1014         PUT_CACHE_DATA_INT(msginfo->date_t);
1015         PUT_CACHE_DATA_INT(flags);
1016         PUT_CACHE_DATA(msginfo->fromname);
1017
1018         PUT_CACHE_DATA(msginfo->date);
1019         PUT_CACHE_DATA(msginfo->from);
1020         PUT_CACHE_DATA(msginfo->to);
1021         PUT_CACHE_DATA(msginfo->cc);
1022         PUT_CACHE_DATA(msginfo->newsgroups);
1023         PUT_CACHE_DATA(msginfo->subject);
1024         PUT_CACHE_DATA(msginfo->msgid);
1025         PUT_CACHE_DATA(msginfo->inreplyto);
1026         PUT_CACHE_DATA(msginfo->xref);
1027         PUT_CACHE_DATA_INT(msginfo->planned_download);
1028         PUT_CACHE_DATA_INT(msginfo->total_size);
1029
1030         PUT_CACHE_DATA_INT(g_slist_length(msginfo->references));
1031
1032         for (cur = msginfo->references; cur != NULL; cur = cur->next) {
1033                 PUT_CACHE_DATA((gchar *)cur->data);
1034         }
1035         return wrote;
1036 }
1037
1038 static int msgcache_write_flags(MsgInfo *msginfo, FILE *fp)
1039 {
1040         MsgPermFlags flags = msginfo->flags.perm_flags;
1041         int w_err = 0, wrote = 0;
1042         WRITE_CACHE_DATA_INT(msginfo->msgnum, fp);
1043         WRITE_CACHE_DATA_INT(flags, fp);
1044         return w_err ? -1 : wrote;
1045 }
1046
1047 static int msgcache_write_tags(MsgInfo *msginfo, FILE *fp)
1048 {
1049         GSList *cur = msginfo->tags;
1050         int w_err = 0, wrote = 0;
1051
1052         WRITE_CACHE_DATA_INT(msginfo->msgnum, fp);
1053         for (; cur; cur = cur->next) {
1054                 gint id = GPOINTER_TO_INT(cur->data);
1055                 if (tags_get_tag(id) != NULL) {
1056                         WRITE_CACHE_DATA_INT(id, fp);
1057                 }
1058         }
1059         WRITE_CACHE_DATA_INT(-1, fp);
1060
1061         return w_err ? -1 : wrote;
1062 }
1063
1064 static int msgcache_write_mmap_flags(MsgInfo *msginfo, char *walk_data)
1065 {
1066         MsgPermFlags flags = msginfo->flags.perm_flags;
1067         int wrote = 0;
1068
1069         PUT_CACHE_DATA_INT(msginfo->msgnum);
1070         PUT_CACHE_DATA_INT(flags);
1071         return wrote;
1072 }
1073
1074 static int msgcache_write_mmap_tags(MsgInfo *msginfo, char *walk_data)
1075 {
1076         GSList *cur = msginfo->tags;
1077         int wrote = 0;
1078
1079         PUT_CACHE_DATA_INT(msginfo->msgnum);
1080         for (; cur; cur = cur->next) {
1081                 gint id = GPOINTER_TO_INT(cur->data);
1082                 if (tags_get_tag(id) != NULL) {
1083                         PUT_CACHE_DATA_INT(id);
1084                 }
1085         }
1086         PUT_CACHE_DATA_INT(-1);
1087         return wrote;
1088 }
1089
1090 struct write_fps
1091 {
1092         FILE *cache_fp;
1093         FILE *mark_fp;
1094         FILE *tags_fp;
1095         char *cache_data;
1096         char *mark_data;
1097         char *tags_data;
1098         int error;
1099         guint cache_size;
1100         guint mark_size;
1101         guint tags_size;
1102 };
1103
1104 static void msgcache_write_func(gpointer key, gpointer value, gpointer user_data)
1105 {
1106         MsgInfo *msginfo;
1107         struct write_fps *write_fps;
1108         int tmp;
1109
1110         msginfo = (MsgInfo *)value;
1111         write_fps = user_data;
1112
1113         tmp = msgcache_write_cache(msginfo, write_fps->cache_fp);
1114         if (tmp < 0)
1115                 write_fps->error = 1;
1116         else
1117                 write_fps->cache_size += tmp;
1118         tmp= msgcache_write_flags(msginfo, write_fps->mark_fp);
1119         if (tmp < 0)
1120                 write_fps->error = 1;
1121         else
1122                 write_fps->mark_size += tmp;
1123         tmp = msgcache_write_tags(msginfo, write_fps->tags_fp);
1124         if (tmp < 0)
1125                 write_fps->error = 1;
1126         else
1127                 write_fps->tags_size += tmp;
1128 }
1129
1130 static void msgcache_write_mmap_func(gpointer key, gpointer value, gpointer user_data)
1131 {
1132         MsgInfo *msginfo;
1133         struct write_fps *write_fps;
1134         int tmp;
1135
1136         msginfo = (MsgInfo *)value;
1137         write_fps = user_data;
1138
1139         tmp = msgcache_write_mmap_cache(msginfo, write_fps->cache_data);
1140         write_fps->cache_size += tmp;
1141         write_fps->cache_data += tmp;
1142         tmp = msgcache_write_mmap_flags(msginfo, write_fps->mark_data);
1143         write_fps->mark_size += tmp;
1144         write_fps->mark_data += tmp;
1145         tmp = msgcache_write_mmap_tags(msginfo, write_fps->tags_data);
1146         write_fps->tags_size += tmp;
1147         write_fps->tags_data += tmp;
1148 }
1149
1150 gint msgcache_write(const gchar *cache_file, const gchar *mark_file, const gchar *tags_file, MsgCache *cache)
1151 {
1152         struct write_fps write_fps;
1153         gchar *new_cache, *new_mark, *new_tags;
1154         int w_err = 0, wrote = 0;
1155         gint map_len = -1;
1156         char *cache_data = NULL;
1157         char *mark_data = NULL;
1158         char *tags_data = NULL;
1159
1160         START_TIMING("");
1161         g_return_val_if_fail(cache_file != NULL, -1);
1162         g_return_val_if_fail(mark_file != NULL, -1);
1163         g_return_val_if_fail(tags_file != NULL, -1);
1164         g_return_val_if_fail(cache != NULL, -1);
1165
1166         new_cache = g_strconcat(cache_file, ".new", NULL);
1167         new_mark  = g_strconcat(mark_file, ".new", NULL);
1168         new_tags  = g_strconcat(tags_file, ".new", NULL);
1169
1170         write_fps.error = 0;
1171         write_fps.cache_size = 0;
1172         write_fps.mark_size = 0;
1173         write_fps.tags_size = 0;
1174
1175         write_fps.cache_fp = msgcache_open_data_file(new_cache, CACHE_VERSION,
1176                 DATA_WRITE, NULL, 0);
1177         if (write_fps.cache_fp == NULL) {
1178                 g_free(new_cache);
1179                 g_free(new_mark);
1180                 g_free(new_tags);
1181                 return -1;
1182         }
1183
1184         WRITE_CACHE_DATA(CS_UTF_8, write_fps.cache_fp);
1185
1186         if (w_err != 0) {
1187                 g_warning("failed to write charset\n");
1188                 fclose(write_fps.cache_fp);
1189                 g_unlink(new_cache);
1190                 g_free(new_cache);
1191                 g_free(new_mark);
1192                 g_free(new_tags);
1193                 return -1;
1194         }
1195
1196         write_fps.mark_fp = msgcache_open_data_file(new_mark, MARK_VERSION,
1197                 DATA_WRITE, NULL, 0);
1198         if (write_fps.mark_fp == NULL) {
1199                 fclose(write_fps.cache_fp);
1200                 g_unlink(new_cache);
1201                 g_free(new_cache);
1202                 g_free(new_mark);
1203                 g_free(new_tags);
1204                 return -1;
1205         }
1206
1207         write_fps.tags_fp = msgcache_open_data_file(new_tags, TAGS_VERSION,
1208                 DATA_WRITE, NULL, 0);
1209         if (write_fps.tags_fp == NULL) {
1210                 fclose(write_fps.cache_fp);
1211                 fclose(write_fps.mark_fp);
1212                 g_unlink(new_cache);
1213                 g_unlink(new_mark);
1214                 g_free(new_cache);
1215                 g_free(new_mark);
1216                 g_free(new_tags);
1217                 return -1;
1218         }
1219
1220         debug_print("\tWriting message cache to %s and %s...\n", new_cache, new_mark);
1221
1222         if (change_file_mode_rw(write_fps.cache_fp, new_cache) < 0)
1223                 FILE_OP_ERROR(new_cache, "chmod");
1224
1225         write_fps.cache_size = ftell(write_fps.cache_fp);
1226         write_fps.mark_size = ftell(write_fps.mark_fp);
1227         write_fps.tags_size = ftell(write_fps.tags_fp);
1228
1229         if (msgcache_use_mmap_write && cache->memusage > 0) {
1230                 map_len = cache->memusage;
1231                 if (ftruncate(fileno(write_fps.cache_fp), (off_t)map_len) == 0) {
1232
1233 #ifdef G_OS_WIN32
1234                         cache_data = NULL;
1235                         HANDLE hFile, hMapping;
1236                         hFile = (HANDLE) _get_osfhandle (fileno(write_fps.cache_fp));
1237                         if (hFile == (HANDLE) -1)
1238                                 goto w32_fail3;
1239                         hMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
1240                         if (!hMapping)
1241                                 goto w32_fail3;
1242                         cache_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
1243                 w32_fail3:
1244                         ;
1245 #else
1246                         cache_data = mmap(NULL, map_len, PROT_WRITE, MAP_SHARED,
1247                                 fileno(write_fps.cache_fp), 0);
1248 #endif
1249                 }
1250                 if (cache_data != NULL && cache_data != MAP_FAILED) {
1251                         if (ftruncate(fileno(write_fps.mark_fp), (off_t)map_len) == 0) {
1252 #ifdef G_OS_WIN32
1253                                 mark_data = NULL;
1254                                 HANDLE hFile, hMapping;
1255                                 hFile = (HANDLE) _get_osfhandle (fileno(write_fps.mark_fp));
1256                                 if (hFile == (HANDLE) -1)
1257                                         goto w32_fail4;
1258                                 hMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
1259                                 if (!hMapping)
1260                                         goto w32_fail4;
1261                                 mark_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
1262                         w32_fail4:
1263                                 ;
1264 #else
1265                                 mark_data = mmap(NULL, map_len, PROT_WRITE, MAP_SHARED,
1266                                         fileno(write_fps.mark_fp), 0);
1267 #endif
1268                         }
1269                         if (mark_data == NULL || mark_data == MAP_FAILED) {
1270 #ifdef G_OS_WIN32
1271                                 UnmapViewOfFile((void*) cache_data);
1272 #else
1273                                 munmap(cache_data, map_len);
1274 #endif
1275                                 cache_data = NULL;
1276                         } else {
1277                                 if (ftruncate(fileno(write_fps.tags_fp), (off_t)map_len) == 0) {
1278 #ifdef G_OS_WIN32
1279                                                 tags_data = NULL;
1280                                                 HANDLE hFile, hMapping;
1281                                                 hFile = (HANDLE) _get_osfhandle (fileno(write_fps.tags_fp));
1282                                                 if (hFile == (HANDLE) -1)
1283                                                         goto w32_fail5;
1284                                                 hMapping = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL);
1285                                                 if (!hMapping)
1286                                                         goto w32_fail5;
1287                                                 tags_data = (unsigned char *)MapViewOfFile(hMapping, FILE_MAP_COPY, 0, 0, 0);
1288                                         w32_fail5:
1289                                                 ;
1290 #else
1291                                         tags_data = mmap(NULL, map_len, PROT_WRITE, MAP_SHARED,
1292                                                 fileno(write_fps.tags_fp), 0);
1293 #endif
1294                                 }
1295                                 if (tags_data == NULL || tags_data == MAP_FAILED) {
1296 #ifdef G_OS_WIN32
1297                                         UnmapViewOfFile((void*) cache_data);
1298                                         UnmapViewOfFile((void*) mark_data);
1299 #else
1300                                         munmap(cache_data, map_len);
1301                                         munmap(mark_data, map_len);
1302 #endif
1303                                         cache_data = NULL;
1304                                         mark_data = NULL;
1305                                 }
1306                         }
1307                 }
1308         }
1309
1310         if (cache_data != NULL && cache_data != MAP_FAILED) {
1311                 write_fps.cache_data = cache_data + ftell(write_fps.cache_fp);
1312                 write_fps.mark_data = mark_data + ftell(write_fps.mark_fp);
1313                 write_fps.tags_data = mark_data + ftell(write_fps.tags_fp);
1314                 g_hash_table_foreach(cache->msgnum_table, msgcache_write_mmap_func, (gpointer)&write_fps);
1315 #ifdef G_OS_WIN32
1316                 UnmapViewOfFile((void*) cache_data);
1317                 UnmapViewOfFile((void*) mark_data);
1318                 UnmapViewOfFile((void*) tags_data);
1319 #else
1320                 munmap(cache_data, map_len);
1321                 munmap(mark_data, map_len);
1322                 munmap(tags_data, map_len);
1323 #endif
1324                 ftruncate(fileno(write_fps.cache_fp), write_fps.cache_size);
1325                 ftruncate(fileno(write_fps.mark_fp), write_fps.mark_size);
1326                 ftruncate(fileno(write_fps.tags_fp), write_fps.tags_size);
1327         } else {
1328 #ifdef HAVE_FWRITE_UNLOCKED
1329                 flockfile(write_fps.cache_fp);
1330                 flockfile(write_fps.mark_fp);
1331                 flockfile(write_fps.tags_fp);
1332 #endif
1333                 g_hash_table_foreach(cache->msgnum_table, msgcache_write_func, (gpointer)&write_fps);
1334 #ifdef HAVE_FWRITE_UNLOCKED
1335                 funlockfile(write_fps.mark_fp);
1336                 funlockfile(write_fps.cache_fp);
1337                 funlockfile(write_fps.tags_fp);
1338 #endif
1339         }
1340
1341         fflush(write_fps.cache_fp);
1342         fflush(write_fps.mark_fp);
1343         fflush(write_fps.tags_fp);
1344
1345 #if 0
1346         fsync(fileno(write_fps.cache_fp));
1347         fsync(fileno(write_fps.mark_fp));
1348         fsync(fileno(write_fps.tags_fp));
1349 #endif
1350
1351         fclose(write_fps.cache_fp);
1352         fclose(write_fps.mark_fp);
1353         fclose(write_fps.tags_fp);
1354
1355
1356         if (write_fps.error != 0) {
1357                 g_unlink(new_cache);
1358                 g_unlink(new_mark);
1359                 g_unlink(new_tags);
1360                 g_free(new_cache);
1361                 g_free(new_mark);
1362                 g_free(new_tags);
1363                 return -1;
1364         } else {
1365                 move_file(new_cache, cache_file, TRUE);
1366                 move_file(new_mark, mark_file, TRUE);
1367                 move_file(new_tags, tags_file, TRUE);
1368                 cache->last_access = time(NULL);
1369         }
1370
1371         g_free(new_cache);
1372         g_free(new_mark);
1373         g_free(new_tags);
1374         debug_print("done.\n");
1375         END_TIMING();
1376         return 0;
1377 }
1378