2 * Copyright notice from original mutt:
3 * Copyright (C) 2004 Thomas Glanzmann <sithglan@stud.uni-erlangen.de>
4 * Copyright (C) 2004 Tobias Werth <sitowert@stud.uni-erlangen.de>
5 * Copyright (C) 2004 Brian Fundakowski Feldman <green@FreeBSD.org>
7 * This file is part of mutt-ng, see http://www.muttng.org/.
8 * It's licensed under the GNU General Public License,
9 * please see the file GPL in the top level source directory.
13 #endif /* HAVE_CONFIG_H */
17 #define MUTTNG_HCACHE_ID "0x004"
20 # include <inttypes.h>
43 #include <lib-lib/mem.h>
44 #include <lib-hash/hash.h>
46 #include <lib-mime/mime.h>
55 #include "lib/debug.h"
78 char lockfile[_POSIX_PATH_MAX];
83 struct timeval timeval;
84 unsigned long uid_validity;
87 static void *lazy_malloc (size_t siz)
89 if (0 < siz && siz < 4096) {
96 static void lazy_realloc (void *ptr, size_t siz)
98 void **p = (void **) ptr;
100 if (p != NULL && 0 < siz && siz < 4096) {
107 static unsigned char *dump_int (unsigned int i, unsigned char *d, int *off)
109 lazy_realloc (&d, *off + sizeof (int));
110 memcpy (d + *off, &i, sizeof (int));
111 (*off) += sizeof (int);
116 static void restore_int (unsigned int *i, const unsigned char *d, int *off)
118 memcpy (i, d + *off, sizeof (int));
119 (*off) += sizeof (int);
122 static unsigned char *dump_char (char *c, unsigned char *d, int *off)
128 d = dump_int (size, d, off);
132 size = m_strlen(c) + 1;
133 d = dump_int (size, d, off);
134 lazy_realloc (&d, *off + size);
135 memcpy (d + *off, c, size);
142 static unsigned char *dump_char_size (char *c, unsigned char *d, int *off,
147 d = dump_int (size, d, off);
151 d = dump_int (size, d, off);
152 lazy_realloc (&d, *off + size);
153 memcpy (d + *off, c, size);
160 static void restore_char (char **c, const unsigned char *d, int *off)
164 restore_int (&size, d, off);
171 *c = p_dup(d + *off, size);
175 static unsigned char *dump_address (address_t * a, unsigned char *d, int *off)
177 unsigned int counter = 0;
178 unsigned int start_off = *off;
180 d = dump_int (0xdeadbeef, d, off);
183 d = dump_char (a->personal, d, off);
184 d = dump_char (a->mailbox, d, off);
185 d = dump_int (a->group, d, off);
190 memcpy (d + start_off, &counter, sizeof (int));
195 static void restore_address (address_t ** a, const unsigned char *d, int *off)
197 unsigned int counter;
199 restore_int (&counter, d, off);
202 *a = p_new(address_t, 1);
203 restore_char (&(*a)->personal, d, off);
204 restore_char (&(*a)->mailbox, d, off);
205 restore_int ((unsigned int *) &(*a)->group, d, off);
213 static unsigned char *dump_list (LIST * l, unsigned char *d, int *off)
215 unsigned int counter = 0;
216 unsigned int start_off = *off;
218 d = dump_int (0xdeadbeef, d, off);
221 d = dump_char (l->data, d, off);
226 memcpy (d + start_off, &counter, sizeof (int));
231 static void restore_list (LIST ** l, const unsigned char *d, int *off)
233 unsigned int counter;
235 restore_int (&counter, d, off);
239 restore_char (&(*l)->data, d, off);
248 static unsigned char *dump_buffer (BUFFER * b, unsigned char *d, int *off)
251 d = dump_int (0, d, off);
255 d = dump_int (1, d, off);
258 d = dump_char_size (b->data, d, off, b->dsize + 1);
259 d = dump_int (b->dptr - b->data, d, off);
260 d = dump_int (b->dsize, d, off);
261 d = dump_int (b->destroy, d, off);
266 static void restore_buffer (BUFFER ** b, const unsigned char *d, int *off)
271 restore_int (&used, d, off);
276 *b = p_new(BUFFER, 1);
278 restore_char (&(*b)->data, d, off);
279 restore_int (&offset, d, off);
280 (*b)->dptr = (*b)->data + offset;
281 restore_int (&(*b)->dsize, d, off);
282 restore_int ((unsigned int *) &(*b)->destroy, d, off);
286 static unsigned char *dump_parameter (PARAMETER * p, unsigned char *d,
289 unsigned int counter = 0;
290 unsigned int start_off = *off;
292 d = dump_int (0xdeadbeef, d, off);
295 d = dump_char (p->attribute, d, off);
296 d = dump_char (p->value, d, off);
301 memcpy (d + start_off, &counter, sizeof (int));
307 restore_parameter (PARAMETER ** p, const unsigned char *d, int *off)
309 unsigned int counter;
311 restore_int (&counter, d, off);
314 *p = p_new(PARAMETER, 1);
315 restore_char (&(*p)->attribute, d, off);
316 restore_char (&(*p)->value, d, off);
324 static unsigned char *dump_body (BODY * c, unsigned char *d, int *off)
326 lazy_realloc (&d, *off + sizeof (BODY));
327 memcpy (d + *off, c, sizeof (BODY));
328 *off += sizeof (BODY);
330 d = dump_char (c->xtype, d, off);
331 d = dump_char (c->subtype, d, off);
333 d = dump_parameter (c->parameter, d, off);
335 d = dump_char (c->description, d, off);
336 d = dump_char (c->form_name, d, off);
337 d = dump_char (c->filename, d, off);
338 d = dump_char (c->d_filename, d, off);
343 static void restore_body (BODY * c, const unsigned char *d, int *off)
345 memcpy (c, d + *off, sizeof (BODY));
346 *off += sizeof (BODY);
348 restore_char (&c->xtype, d, off);
349 restore_char (&c->subtype, d, off);
351 restore_parameter (&c->parameter, d, off);
353 restore_char (&c->description, d, off);
354 restore_char (&c->form_name, d, off);
355 restore_char (&c->filename, d, off);
356 restore_char (&c->d_filename, d, off);
359 static unsigned char *dump_envelope (ENVELOPE * e, unsigned char *d, int *off)
361 d = dump_address (e->return_path, d, off);
362 d = dump_address (e->from, d, off);
363 d = dump_address (e->to, d, off);
364 d = dump_address (e->cc, d, off);
365 d = dump_address (e->bcc, d, off);
366 d = dump_address (e->sender, d, off);
367 d = dump_address (e->reply_to, d, off);
368 d = dump_address (e->mail_followup_to, d, off);
370 d = dump_char (e->subject, d, off);
372 d = dump_int (e->real_subj - e->subject, d, off);
375 d = dump_int (-1, d, off);
377 d = dump_char (e->message_id, d, off);
378 d = dump_char (e->supersedes, d, off);
379 d = dump_char (e->date, d, off);
380 d = dump_char (e->x_label, d, off);
381 d = dump_char (e->list_post, d, off);
384 d = dump_char (e->newsgroups, d, off);
385 d = dump_char (e->xref, d, off);
386 d = dump_char (e->followup_to, d, off);
387 d = dump_char (e->x_comment_to, d, off);
390 d = dump_list (e->references, d, off);
391 d = dump_list (e->in_reply_to, d, off);
392 d = dump_list (e->userhdrs, d, off);
397 static void restore_envelope (ENVELOPE * e, const unsigned char *d, int *off)
401 restore_address (&e->return_path, d, off);
402 restore_address (&e->from, d, off);
403 restore_address (&e->to, d, off);
404 restore_address (&e->cc, d, off);
405 restore_address (&e->bcc, d, off);
406 restore_address (&e->sender, d, off);
407 restore_address (&e->reply_to, d, off);
408 restore_address (&e->mail_followup_to, d, off);
410 restore_char (&e->subject, d, off);
411 restore_int ((unsigned int *) (&real_subj_off), d, off);
412 if (0 <= real_subj_off) {
413 e->real_subj = e->subject + real_subj_off;
418 restore_char (&e->message_id, d, off);
419 restore_char (&e->supersedes, d, off);
420 restore_char (&e->date, d, off);
421 restore_char (&e->x_label, d, off);
422 restore_char (&e->list_post, d, off);
425 restore_char (&e->newsgroups, d, off);
426 restore_char (&e->xref, d, off);
427 restore_char (&e->followup_to, d, off);
428 restore_char (&e->x_comment_to, d, off);
431 restore_list (&e->references, d, off);
432 restore_list (&e->in_reply_to, d, off);
433 restore_list (&e->userhdrs, d, off);
437 unsigned int crc32 (unsigned int crc, unsigned char const *p, size_t len)
443 for (i = 0; i < 8; i++)
444 crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
449 static int generate_crc32 ()
453 crc = crc32 (crc, (unsigned char const *)
454 MUTTNG_HCACHE_ID "sithglan@stud.uni-erlangen.de[sithglan]|hcache.c|20041108231548|29613",
456 (MUTTNG_HCACHE_ID "sithglan@stud.uni-erlangen.de[sithglan]|hcache.c|20041108231548|29613"));
458 #if HAVE_LANGINFO_CODESET
459 crc = crc32 (crc, (unsigned char const *) Charset, m_strlen(Charset));
460 crc = crc32 (crc, (unsigned char const *) "HAVE_LANGINFO_CODESET",
461 m_strlen("HAVE_LANGINFO_CODESET"));
464 crc = crc32(crc, (unsigned char const *) "USE_POP", m_strlen("USE_POP"));
468 crc32 (crc, (unsigned char const *) "MIXMASTER",
469 m_strlen("MIXMASTER"));
474 crc32 (crc, (unsigned char const *) "USE_IMAP", m_strlen("USE_IMAP"));
479 crc32 (crc, (unsigned char const *) "USE_NNTP", m_strlen("USE_NNTP"));
484 static int crc32_matches (const char *d, unsigned int crc)
486 int off = sizeof (validate);
487 unsigned int mycrc = 0;
493 restore_int (&mycrc, (unsigned char *) d, &off);
495 return (crc == mycrc);
498 /* Append md5sumed folder to path if path is a directory. */
499 static const char *mutt_hcache_per_folder (const char *path,
502 static char mutt_hcache_per_folder_path[_POSIX_PATH_MAX];
503 struct stat path_stat;
505 unsigned char md5sum[16];
508 ret = stat (path, &path_stat);
513 if (!S_ISDIR (path_stat.st_mode)) {
518 MD5Update (&md5, (unsigned char *) folder, m_strlen(folder));
519 MD5Final (md5sum, &md5);
521 ret = snprintf (mutt_hcache_per_folder_path, _POSIX_PATH_MAX,
522 "%s/%02x%02x%02x%02x%02x%02x%02x%02x"
523 "%02x%02x%02x%02x%02x%02x%02x%02x",
524 path, md5sum[0], md5sum[1], md5sum[2], md5sum[3],
525 md5sum[4], md5sum[5], md5sum[6], md5sum[7], md5sum[8],
526 md5sum[9], md5sum[10], md5sum[11], md5sum[12],
527 md5sum[13], md5sum[14], md5sum[15]);
533 return mutt_hcache_per_folder_path;
536 /* This function transforms a header into a char so that it is useable by
538 static void *mutt_hcache_dump (void *_db, HEADER * h, int *off,
539 unsigned long uid_validity)
541 struct header_cache *db = _db;
542 unsigned char *d = NULL;
546 d = lazy_malloc (sizeof (validate));
549 memcpy (d, &uid_validity, sizeof (unsigned long));
554 gettimeofday (&now, NULL);
555 memcpy (d, &now, sizeof (struct timeval));
557 *off += sizeof (validate);
559 d = dump_int (db->crc, d, off);
561 lazy_realloc (&d, *off + sizeof (HEADER));
562 memcpy (d + *off, h, sizeof (HEADER));
563 *off += sizeof (HEADER);
565 d = dump_envelope (h->env, d, off);
566 d = dump_body (h->content, d, off);
567 d = dump_char (h->maildir_flags, d, off);
572 HEADER *mutt_hcache_restore (const unsigned char *d, HEADER ** oh)
575 HEADER *h = mutt_new_header ();
578 off += sizeof (validate);
581 off += sizeof (unsigned int);
583 memcpy (h, d + off, sizeof (HEADER));
584 off += sizeof (HEADER);
586 h->env = mutt_new_envelope ();
587 restore_envelope (h->env, d, &off);
589 h->content = mutt_new_body ();
590 restore_body (h->content, d, &off);
592 restore_char (&h->maildir_flags, d, &off);
594 /* this is needed for maildir style mailboxes */
597 h->path = m_strdup((*oh)->path);
598 mutt_free_header (oh);
606 mutt_hcache_open(const char *path, const char *folder)
608 struct header_cache *h = p_new(HEADER_CACHE, 1);
609 int flags = VL_OWRITER | VL_OCREAT;
611 h->folder = m_strdup(folder);
612 h->crc = generate_crc32();
614 if (!path || path[0] == '\0')
616 p_delete(&h->folder);
621 path = mutt_hcache_per_folder(path, folder);
623 if (option(OPTHCACHECOMPRESS))
626 h->db = vlopen(path, flags, VL_CMPLEX);
631 p_delete(&h->folder);
639 mutt_hcache_close(void *db)
641 struct header_cache *h = db;
647 p_delete(&h->folder);
652 mutt_hcache_fetch(void *db, const char *filename,
653 size_t(*keylen) (const char *fn))
655 struct header_cache *h = db;
656 char path[_POSIX_PATH_MAX];
663 m_strcpy(path, sizeof(path), h->folder);
664 m_strcat(path, sizeof(path), filename);
666 ksize = strlen(h->folder) + keylen(path + strlen(h->folder));
668 data = vlget(h->db, path, ksize, NULL);
670 if (!crc32_matches(data, h->crc))
680 mutt_hcache_store(void *db, const char *filename, HEADER * header,
681 unsigned long uid_validity,
682 size_t(*keylen) (const char *fn))
684 struct header_cache *h = db;
685 char path[_POSIX_PATH_MAX];
693 m_strcpy(path, sizeof(path), h->folder);
694 m_strcat(path, sizeof(path), filename);
696 ksize = strlen(h->folder) + keylen(path + strlen(h->folder));
698 data = mutt_hcache_dump(db, header, &dsize, uid_validity);
700 ret = vlput(h->db, path, ksize, data, dsize, VL_DOVER);
708 mutt_hcache_delete(void *db, const char *filename,
709 size_t(*keylen) (const char *fn))
711 struct header_cache *h = db;
712 char path[_POSIX_PATH_MAX];
718 m_strcpy(path, sizeof(path), h->folder);
719 m_strcat(path, sizeof(path), filename);
721 ksize = strlen(h->folder) + keylen(path + strlen(h->folder));
723 return vlout(h->db, path, ksize);
728 void *mutt_hcache_open (const char *path, const char *folder)
730 struct header_cache *h = p_new(HEADER_CACHE, 1);
732 atoi (HeaderCachePageSize) ? atoi (HeaderCachePageSize) : 16384;
734 h->folder = m_strdup(folder);
735 h->crc = generate_crc32 ();
737 if (!path || path[0] == '\0') {
738 p_delete(&h->folder);
743 path = mutt_hcache_per_folder (path, folder);
745 h->db = gdbm_open ((char *) path, pagesize, GDBM_WRCREAT, 00600, NULL);
750 /* if rw failed try ro */
751 h->db = gdbm_open ((char *) path, pagesize, GDBM_READER, 00600, NULL);
756 p_delete(&h->folder);
763 void mutt_hcache_close (void *db)
765 struct header_cache *h = db;
772 p_delete(&h->folder);
776 void *mutt_hcache_fetch (void *db, const char *filename,
777 size_t (*keylen) (const char *fn))
779 struct header_cache *h = db;
782 char path[_POSIX_PATH_MAX];
788 m_strcpy(path, sizeof(path), h->folder);
789 strncat (path, filename, sizeof (path) - m_strlen(path));
792 key.dsize = keylen (path);
794 data = gdbm_fetch (h->db, key);
796 if (!crc32_matches (data.dptr, h->crc)) {
797 p_delete(&data.dptr);
805 mutt_hcache_store (void *db, const char *filename, HEADER * header,
806 unsigned long uid_validity, size_t (*keylen) (const char *fn))
808 struct header_cache *h = db;
811 char path[_POSIX_PATH_MAX];
818 m_strcpy(path, sizeof(path), h->folder);
819 strncat (path, filename, sizeof (path) - m_strlen(path));
822 key.dsize = keylen (path);
824 data.dptr = mutt_hcache_dump (db, header, &data.dsize, uid_validity);
826 ret = gdbm_store (h->db, key, data, GDBM_REPLACE);
828 p_delete(&data.dptr);
834 mutt_hcache_delete (void *db, const char *filename,
835 size_t (*keylen) (const char *fn))
838 struct header_cache *h = db;
839 char path[_POSIX_PATH_MAX];
845 m_strcpy(path, sizeof(path), h->folder);
846 strncat (path, filename, sizeof (path) - m_strlen(path));
849 key.dsize = keylen (path);
851 return gdbm_delete (h->db, key);
855 static void mutt_hcache_dbt_init (DBT * dbt, void *data, size_t len)
858 dbt->size = dbt->ulen = len;
859 dbt->dlen = dbt->doff = 0;
860 dbt->flags = DB_DBT_USERMEM;
863 static void mutt_hcache_dbt_empty_init (DBT * dbt)
866 dbt->size = dbt->ulen = dbt->dlen = dbt->doff = 0;
870 void *mutt_hcache_open (const char *path, const char *folder)
873 u_int32_t createflags = DB_CREATE;
875 struct header_cache *h = calloc (1, sizeof (HEADER_CACHE));
876 int pagesize = atoi (HeaderCachePageSize);
879 h->crc = generate_crc32 ();
881 if (!path || path[0] == '\0') {
886 path = mutt_hcache_per_folder (path, folder);
888 snprintf (h->lockfile, _POSIX_PATH_MAX, "%s-lock-hack", path);
890 h->fd = open (h->lockfile, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
896 if (mx_lock_file (h->lockfile, h->fd, 1, 0, 5)) {
902 ret = db_env_create (&h->env, 0);
904 mx_unlock_file (h->lockfile, h->fd, 0);
911 (h->env->open)(h->env, NULL, DB_INIT_MPOOL | DB_CREATE | DB_PRIVATE, 0600);
913 ret = db_create (&h->db, h->env, 0);
915 h->env->close (h->env, 0);
916 mx_unlock_file (h->lockfile, h->fd, 0);
923 if (stat (path, &sb) != 0 && errno == ENOENT) {
924 createflags |= DB_EXCL;
925 h->db->set_pagesize (h->db, pagesize);
928 ret = (h->db->open)(h->db, NULL, path, folder, DB_BTREE, createflags, 0600);
930 h->db->close (h->db, 0);
931 h->env->close (h->env, 0);
932 mx_unlock_file (h->lockfile, h->fd, 0);
941 void mutt_hcache_close (void *db)
943 struct header_cache *h = db;
949 h->db->close (h->db, 0);
950 h->env->close (h->env, 0);
951 mx_unlock_file (h->lockfile, h->fd, 0);
956 void *mutt_hcache_fetch (void *db, const char *filename,
957 size_t (*keylen) (const char *fn))
961 struct header_cache *h = db;
967 filename++; /* skip '/' */
969 mutt_hcache_dbt_init (&key, (void *) filename, keylen (filename));
970 mutt_hcache_dbt_empty_init (&data);
971 data.flags = DB_DBT_MALLOC;
973 h->db->get (h->db, NULL, &key, &data, 0);
975 if (!crc32_matches (data.data, h->crc)) {
976 p_delete(&data.data);
984 mutt_hcache_store (void *db, const char *filename, HEADER * header,
985 unsigned long uid_validity, size_t (*keylen) (const char *fn))
990 struct header_cache *h = db;
996 filename++; /* skip '/' */
998 mutt_hcache_dbt_init (&key, (void *) filename, keylen (filename));
1000 mutt_hcache_dbt_empty_init (&data);
1001 data.flags = DB_DBT_USERMEM;
1003 mutt_hcache_dump (db, header, (signed int *) &data.size, uid_validity);
1004 data.ulen = data.size;
1006 ret = h->db->put (h->db, NULL, &key, &data, 0);
1008 p_delete(&data.data);
1014 mutt_hcache_delete (void *db, const char *filename,
1015 size_t (*keylen) (const char *fn))
1018 struct header_cache *h = db;
1024 filename++; /* skip '/' */
1026 mutt_hcache_dbt_init (&key, (void *) filename, keylen (filename));
1027 return h->db->del (h->db, NULL, &key, 0);
1031 #endif /* USE_HCACHE */