2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
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.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
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
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track,
65 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
66 static int trackdb_get_global_tid(const char *name,
69 static char **trackdb_new_tid(int *ntracksp,
72 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
74 const struct cache_type cache_files_type = { 86400 };
75 unsigned long cache_files_hits, cache_files_misses;
77 /* setup and teardown ********************************************************/
79 static const char *home; /* home had better not change */
80 DB_ENV *trackdb_env; /* db environment */
81 DB *trackdb_tracksdb; /* the db itself */
82 DB *trackdb_prefsdb; /* preferences */
83 DB *trackdb_searchdb; /* the search database */
84 DB *trackdb_tagsdb; /* the tags database */
85 DB *trackdb_globaldb; /* global preferences */
86 DB *trackdb_noticeddb; /* when track noticed */
87 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
88 static pid_t rescan_pid = -1; /* rescanner PID */
89 static int initialized, opened; /* state */
91 /* tracks matched by required_tags */
92 static char **reqtracks;
93 static size_t nreqtracks;
95 /* comparison function for keys */
96 static int compare(DB attribute((unused)) *db_,
97 const DBT *a, const DBT *b) {
98 return compare_path_raw(a->data, a->size, b->data, b->size);
101 /* open environment */
102 void trackdb_init(int recover) {
104 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
107 assert(initialized == 0);
110 if(strcmp(home, config->home))
111 fatal(0, "cannot change db home without server restart");
115 /* create environment */
116 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
118 if((err = trackdb_env->set_alloc(trackdb_env,
119 xmalloc_noptr, xrealloc_noptr, xfree)))
120 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
121 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
122 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
123 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
124 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
125 if((err = trackdb_env->open(trackdb_env, config->home,
131 |recover_type[recover],
133 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
134 trackdb_env->set_errpfx(trackdb_env, "DB");
135 trackdb_env->set_errfile(trackdb_env, stderr);
136 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
137 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
138 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
139 D(("initialized database environment"));
142 /* called when deadlock manager terminates */
143 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
144 pid_t attribute((unused)) pid,
146 const struct rusage attribute((unused)) *rusage,
147 void attribute((unused)) *u) {
148 db_deadlock_pid = -1;
150 fatal(0, "deadlock manager unexpectedly terminated: %s",
153 D(("deadlock manager terminated: %s", wstat(status)));
157 static pid_t subprogram(ev_source *ev, const char *prog) {
161 /* If we're in the background then trap subprocess stdout/stderr */
163 lfd = logfd(ev, prog);
166 if(!(pid = xfork())) {
168 ev_signal_atfork(ev);
169 signal(SIGPIPE, SIG_DFL);
174 /* If we were negatively niced, undo it. We don't bother checking for
175 * error, it's not that important. */
176 setpriority(PRIO_PROCESS, 0, 0);
177 execlp(prog, prog, "--config", configfile,
178 debugging ? "--debug" : "--no-debug",
180 fatal(errno, "error invoking %s", prog);
182 if(lfd != -1) xclose(lfd);
186 /* start deadlock manager */
187 void trackdb_master(ev_source *ev) {
188 assert(db_deadlock_pid == -1);
189 db_deadlock_pid = subprogram(ev, DEADLOCK);
190 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
191 D(("started deadlock manager"));
194 /* close environment */
195 void trackdb_deinit(void) {
199 assert(initialized == 1);
202 /* close the environment */
203 if((err = trackdb_env->close(trackdb_env, 0)))
204 fatal(0, "trackdb_env->close: %s", db_strerror(err));
206 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
207 fatal(errno, "error killing rescanner");
209 /* terminate the deadlock manager */
210 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
211 fatal(errno, "error killing deadlock manager");
212 db_deadlock_pid = -1;
214 D(("deinitialized database environment"));
217 /* open a specific database */
218 static DB *open_db(const char *path,
226 D(("open %s", path));
227 path = config_get_file(path);
228 if((err = db_create(&db, trackdb_env, 0)))
229 fatal(0, "db_create %s: %s", path, db_strerror(err));
231 if((err = db->set_flags(db, dbflags)))
232 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
233 if(dbtype == DB_BTREE)
234 if((err = db->set_bt_compare(db, compare)))
235 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
236 if((err = db->open(db, 0, path, 0, dbtype,
237 openflags | DB_AUTO_COMMIT, mode)))
238 fatal(0, "db->open %s: %s", path, db_strerror(err));
242 /* open track databases */
243 void trackdb_open(void) {
247 /* open the databases */
248 trackdb_tracksdb = open_db("tracks.db",
249 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
250 trackdb_searchdb = open_db("search.db",
251 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
252 trackdb_tagsdb = open_db("tags.db",
253 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
254 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
255 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
256 trackdb_noticeddb = open_db("noticed.db",
257 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
258 D(("opened databases"));
261 /* close track databases */
262 void trackdb_close(void) {
268 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
269 fatal(0, "error closing tracks.db: %s", db_strerror(err));
270 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
271 fatal(0, "error closing search.db: %s", db_strerror(err));
272 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
273 fatal(0, "error closing tags.db: %s", db_strerror(err));
274 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
275 fatal(0, "error closing prefs.db: %s", db_strerror(err));
276 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
277 fatal(0, "error closing global.db: %s", db_strerror(err));
278 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
279 fatal(0, "error closing noticed.db: %s", db_strerror(err));
280 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
281 trackdb_tagsdb = trackdb_globaldb = 0;
282 D(("closed databases"));
285 /* generic db routines *******************************************************/
287 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
288 * DB_LOCK_DEADLOCK. */
289 int trackdb_getdata(DB *db,
296 switch(err = db->get(db, tid, make_key(&key, track),
297 prepare_data(&data), 0)) {
299 *kp = kvp_urldecode(data.data, data.size);
304 case DB_LOCK_DEADLOCK:
305 error(0, "error querying database: %s", db_strerror(err));
308 fatal(0, "error querying database: %s", db_strerror(err));
312 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
313 * DB_LOCK_DEADLOCK. */
314 int trackdb_putdata(DB *db,
322 switch(err = db->put(db, tid, make_key(&key, track),
323 encode_data(&data, k), flags)) {
327 case DB_LOCK_DEADLOCK:
328 error(0, "error updating database: %s", db_strerror(err));
331 fatal(0, "error updating database: %s", db_strerror(err));
335 /* delete a database entry */
336 int trackdb_delkey(DB *db,
342 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
346 case DB_LOCK_DEADLOCK:
347 error(0, "error updating database: %s", db_strerror(err));
350 fatal(0, "error updating database: %s", db_strerror(err));
354 /* open a database cursor */
355 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
359 switch(err = db->cursor(db, tid, &c, 0)) {
361 default: fatal(0, "error creating cursor: %s", db_strerror(err));
366 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
367 int trackdb_closecursor(DBC *c) {
371 switch(err = c->c_close(c)) {
374 case DB_LOCK_DEADLOCK:
375 error(0, "error closing cursor: %s", db_strerror(err));
378 fatal(0, "error closing cursor: %s", db_strerror(err));
382 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
383 int trackdb_delkeydata(DB *db,
391 c = trackdb_opencursor(db, tid);
392 switch(err = c->c_get(c, make_key(&key, word),
393 make_key(&data, track), DB_GET_BOTH)) {
395 switch(err = c->c_del(c, 0)) {
401 case DB_LOCK_DEADLOCK:
402 error(0, "error updating database: %s", db_strerror(err));
405 fatal(0, "c->c_del: %s", db_strerror(err));
410 case DB_LOCK_DEADLOCK:
411 error(0, "error updating database: %s", db_strerror(err));
414 fatal(0, "c->c_get: %s", db_strerror(err));
416 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
420 /* start a transaction */
421 DB_TXN *trackdb_begin_transaction(void) {
425 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
426 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
430 /* abort transaction */
431 void trackdb_abort_transaction(DB_TXN *tid) {
435 if((err = tid->abort(tid)))
436 fatal(0, "tid->abort: %s", db_strerror(err));
439 /* commit transaction */
440 void trackdb_commit_transaction(DB_TXN *tid) {
443 if((err = tid->commit(tid, 0)))
444 fatal(0, "tid->commit: %s", db_strerror(err));
447 /* search/tags shared code ***************************************************/
449 /* comparison function used by dedupe() */
450 static int wordcmp(const void *a, const void *b) {
451 return strcmp(*(const char **)a, *(const char **)b);
454 /* sort and de-dupe VEC */
455 static char **dedupe(char **vec, int nvec) {
458 qsort(vec, nvec, sizeof (char *), wordcmp);
462 for(n = 1; n < nvec; ++n)
463 if(strcmp(vec[n], vec[m - 1]))
470 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
471 static int register_word(DB *db, const char *what,
472 const char *track, const char *word,
477 switch(err = db->put(db, tid, make_key(&key, word),
478 make_key(&data, track), DB_NODUPDATA)) {
482 case DB_LOCK_DEADLOCK:
483 error(0, "error updating %s.db: %s", what, db_strerror(err));
486 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
490 /* search primitives *********************************************************/
492 /* return true iff NAME is a trackname_display_ pref */
493 static int is_display_pref(const char *name) {
494 static const char prefix[] = "trackname_display_";
495 return !strncmp(name, prefix, (sizeof prefix) - 1);
498 /* compute the words of a track name */
499 static char **track_to_words(const char *track,
500 const struct kvp *p) {
504 const char *rootless = track_rootless(track);
507 rootless = track; /* bodge */
509 if((w = words(casefold(strip_extension(rootless)), &nw)))
510 vector_append_many(&v, w, nw);
512 for(; p; p = p->next)
513 if(is_display_pref(p->name))
514 if((w = words(casefold(p->value), &nw)))
515 vector_append_many(&v, w, nw);
516 vector_terminate(&v);
517 return dedupe(v.vec, v.nvec);
520 /* return nonzero iff WORD is a stopword */
521 static int stopword(const char *word) {
524 for(n = 0; n < config->stopword.n
525 && strcmp(word, config->stopword.s[n]); ++n)
527 return n < config->stopword.n;
530 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
531 static int register_search_word(const char *track, const char *word,
533 if(stopword(word)) return 0;
534 return register_word(trackdb_searchdb, "search", track, word, tid);
537 /* Tags **********************************************************************/
539 /* Return nonzero if C is a valid tag character */
540 static int tagchar(int c) {
549 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
550 static char **parsetags(const char *s) {
556 /* skip initial separators */
557 while(*s && (!tagchar(*s) || *s == ' '))
560 /* find the extent of the tag */
562 while(*s && tagchar(*s))
564 /* strip trailing spaces */
565 while(s > t && s[-1] == ' ')
567 vector_append(&v, xstrndup(t, s - t));
568 /* skip intermediate and trailing separators */
569 while(*s && (!tagchar(*s) || *s == ' '))
573 vector_terminate(&v);
574 return dedupe(v.vec, v.nvec);
577 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
578 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
579 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
582 /* aliases *******************************************************************/
584 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
585 * there is no alias sets *aliasp to 0. */
586 static int compute_alias(char **aliasp,
591 const char *s = config->alias, *t, *expansion, *part;
592 int c, used_db = 0, slash_prefix, err;
594 const char *const root = find_track_root(track);
597 /* Bodge for tracks with no root */
602 dynstr_append_string(&d, root);
603 while((c = (unsigned char)*s++)) {
605 dynstr_append(&d, c);
608 if((slash_prefix = (*s == '/')))
611 assert(t != 0); /* validated at startup */
612 part = xstrndup(s, t - s);
613 expansion = getpart(track, "display", part, p, &used_db);
615 if(slash_prefix) dynstr_append(&d, '/');
616 dynstr_append_string(&d, expansion);
618 s = t + 1; /* skip {part} */
620 /* only admit to the alias if we used the db... */
625 dynstr_terminate(&d);
626 /* ...and the answer differs from the original... */
627 if(!strcmp(track, d.vec)) {
631 /* ...and there isn't already a different track with that name (including as
633 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
635 if((s = kvp_get(at, "_alias_for"))
636 && !strcmp(s, track)) {
648 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
649 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
650 * Always sets the return values, even if only to null pointers. */
651 static int gettrackdata(const char *track,
654 const char **actualp,
656 #define GTD_NOALIAS 0x0001
659 const char *actual = track;
660 struct kvp *t = 0, *p = 0;
662 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
663 if((actual = kvp_get(t, "_alias_for"))) {
664 if(flags & GTD_NOALIAS) {
665 error(0, "alias passed to gettrackdata where real path required");
668 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
673 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
678 if(actualp) *actualp = actual;
684 /* trackdb_notice() **********************************************************/
686 /** @brief notice a possibly new track
687 * @return @c DB_NOTFOUND if new, 0 if already known
689 int trackdb_notice(const char *track,
695 tid = trackdb_begin_transaction();
696 err = trackdb_notice_tid(track, path, tid);
697 if((err == DB_LOCK_DEADLOCK)) goto fail;
700 trackdb_abort_transaction(tid);
702 trackdb_commit_transaction(tid);
706 /** @brief notice a possibly new track
707 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
709 int trackdb_notice_tid(const char *track,
713 struct kvp *t, *a, *p;
717 /* notice whether the tracks.db entry changes */
719 /* get any existing tracks entry */
720 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
722 ret = err; /* 0 or DB_NOTFOUND */
723 /* this is a real track */
724 t_changed += kvp_set(&t, "_alias_for", 0);
725 t_changed += kvp_set(&t, "_path", path);
726 /* if we have an alias record it in the database */
727 if((err = compute_alias(&alias, track, p, tid))) return err;
729 /* won't overwrite someone else's alias as compute_alias() checks */
730 D(("%s: alias %s", track, alias));
732 kvp_set(&a, "_alias_for", track);
733 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
735 /* update search.db */
736 w = track_to_words(track, p);
737 for(n = 0; w[n]; ++n)
738 if((err = register_search_word(track, w[n], tid)))
741 w = parsetags(kvp_get(p, "tags"));
742 for(n = 0; w[n]; ++n)
743 if((err = register_tag(track, w[n], tid)))
746 /* only store the tracks.db entry if it has changed */
747 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
749 if(ret == DB_NOTFOUND) {
750 uint32_t timestamp[2];
755 timestamp[0] = htonl((uint64_t)now >> 32);
756 timestamp[1] = htonl((uint32_t)now);
757 memset(&key, 0, sizeof key);
758 key.data = timestamp;
759 key.size = sizeof timestamp;
760 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
761 make_key(&data, track), 0)) {
763 case DB_LOCK_DEADLOCK: return err;
764 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
770 /* trackdb_obsolete() ********************************************************/
772 /* obsolete a track */
773 int trackdb_obsolete(const char *track, DB_TXN *tid) {
778 if((err = gettrackdata(track, 0, &p, 0,
779 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
781 else if(err == DB_NOTFOUND) return 0;
782 /* compute the alias, if any, and delete it */
783 if(compute_alias(&alias, track, p, tid)) return err;
785 /* if the alias points to some other track then compute_alias won't
787 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
790 /* update search.db */
791 w = track_to_words(track, p);
792 for(n = 0; w[n]; ++n)
793 if(trackdb_delkeydata(trackdb_searchdb,
794 w[n], track, tid) == DB_LOCK_DEADLOCK)
797 w = parsetags(kvp_get(p, "tags"));
798 for(n = 0; w[n]; ++n)
799 if(trackdb_delkeydata(trackdb_tagsdb,
800 w[n], track, tid) == DB_LOCK_DEADLOCK)
803 /* update tracks.db */
804 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
806 /* We don't delete the prefs, so they survive temporary outages of the
807 * (possibly virtual) track filesystem */
811 /* trackdb_stats() ***********************************************************/
813 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
814 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
816 static const struct statinfo {
819 } statinfo_hash[] = {
835 }, statinfo_btree[] = {
856 /* look up stats for DB */
857 static int get_stats(struct vector *v,
859 const struct statinfo *si,
868 switch(err = database->stat(database, tid, &sp, 0)) {
871 case DB_LOCK_DEADLOCK:
872 error(0, "error querying database: %s", db_strerror(err));
875 fatal(0, "error querying database: %s", db_strerror(err));
877 for(n = 0; n < nsi; ++n) {
878 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
879 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
880 vector_append(v, str);
886 struct search_entry {
891 /* find the top COUNT words in the search database */
892 static int search_league(struct vector *v, int count, DB_TXN *tid) {
893 struct search_entry *se;
896 int err, n = 0, nse = 0, i;
901 cursor = trackdb_opencursor(trackdb_searchdb, tid);
902 se = xmalloc(count * sizeof *se);
903 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
905 if(word && wl == k.size && !strncmp(word, k.data, wl))
908 #define FINALIZE() do { \
909 if(word && (nse < count || n > se[nse - 1].n)) { \
914 while(i > 0 && n > se[i - 1].n) \
916 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
922 word = xstrndup(k.data, wl = k.size);
930 case DB_LOCK_DEADLOCK:
931 error(0, "error querying search database: %s", db_strerror(err));
934 fatal(0, "error querying search database: %s", db_strerror(err));
936 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
939 byte_xasprintf(&str, "Top %d search words:", nse);
940 vector_append(v, str);
941 for(i = 0; i < nse; ++i) {
942 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
943 vector_append(v, str);
948 #define SI(what) statinfo_##what, \
949 sizeof statinfo_##what / sizeof (struct statinfo)
951 /* return a list of database stats */
952 char **trackdb_stats(int *nstatsp) {
959 tid = trackdb_begin_transaction();
961 vector_append(&v, (char *)"Tracks database stats:");
962 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
963 vector_append(&v, (char *)"");
964 vector_append(&v, (char *)"Search database stats:");
965 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
966 vector_append(&v, (char *)"");
967 vector_append(&v, (char *)"Prefs database stats:");
968 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
969 vector_append(&v, (char *)"");
970 if(search_league(&v, 10, tid)) goto fail;
971 vector_append(&v, (char *)"");
972 vector_append(&v, (char *)"Server stats:");
973 byte_xasprintf(&s, "track lookup cache hits: %lu", cache_files_hits);
974 vector_append(&v, (char *)s);
975 byte_xasprintf(&s, "track lookup cache misses: %lu", cache_files_misses);
976 vector_append(&v, (char *)s);
977 vector_terminate(&v);
980 trackdb_abort_transaction(tid);
982 trackdb_commit_transaction(tid);
983 if(nstatsp) *nstatsp = v.nvec;
987 /* set a pref (remove if value=0) */
988 int trackdb_set(const char *track,
991 struct kvp *t, *p, *a;
994 char *oldalias, *newalias, **oldtags = 0, **newtags;
997 /* TODO: if value matches default then set value=0 */
1001 tid = trackdb_begin_transaction();
1002 if((err = gettrackdata(track, &t, &p, 0,
1003 0, tid)) == DB_LOCK_DEADLOCK)
1005 if(err == DB_NOTFOUND) break;
1006 if(name[0] == '_') {
1007 if(kvp_set(&t, name, value))
1008 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1011 /* get the old alias name */
1012 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1013 /* get the old tags */
1014 if(!strcmp(name, "tags"))
1015 oldtags = parsetags(kvp_get(p, "tags"));
1017 if(kvp_set(&p, name, value))
1018 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1020 /* compute the new alias name */
1021 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1022 /* check whether alias has changed */
1023 if(!(oldalias == newalias
1024 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1025 /* adjust alias records to fit change */
1027 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1030 kvp_set(&a, "_alias_for", track);
1031 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1034 /* check whether tags have changed */
1035 if(!strcmp(name, "tags")) {
1036 newtags = parsetags(value);
1037 while(*oldtags || *newtags) {
1038 if(*oldtags && *newtags) {
1039 cmp = strcmp(*oldtags, *newtags);
1041 /* keeping this tag */
1045 /* old tag fits into a gap in the new list, so delete old */
1048 /* new tag fits into a gap in the old list, so insert new */
1050 } else if(*oldtags) {
1051 /* we've run out of new tags, so remaining old ones are to be
1054 if(trackdb_delkeydata(trackdb_tagsdb,
1055 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1059 /* we've run out of old tags, so remainig new ones are to be
1062 if(register_tag(track, *newtags, tid)) goto fail;
1072 trackdb_abort_transaction(tid);
1074 trackdb_commit_transaction(tid);
1075 return err == 0 ? 0 : -1;
1079 const char *trackdb_get(const char *track,
1081 return kvp_get(trackdb_get_all(track), name);
1084 /* get all prefs as a 0-terminated array */
1085 struct kvp *trackdb_get_all(const char *track) {
1086 struct kvp *t, *p, **pp;
1090 tid = trackdb_begin_transaction();
1091 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1095 trackdb_abort_transaction(tid);
1097 trackdb_commit_transaction(tid);
1098 for(pp = &p; *pp; pp = &(*pp)->next)
1105 const char *trackdb_resolve(const char *track) {
1110 tid = trackdb_begin_transaction();
1111 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1115 trackdb_abort_transaction(tid);
1117 trackdb_commit_transaction(tid);
1121 int trackdb_isalias(const char *track) {
1122 const char *actual = trackdb_resolve(track);
1124 return strcmp(actual, track);
1127 /* test whether a track exists (perhaps an alias) */
1128 int trackdb_exists(const char *track) {
1133 tid = trackdb_begin_transaction();
1134 /* unusually, here we want the return value */
1135 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1139 trackdb_abort_transaction(tid);
1141 trackdb_commit_transaction(tid);
1145 /* return the list of tags */
1146 char **trackdb_alltags(void) {
1152 tid = trackdb_begin_transaction();
1153 err = trackdb_alltags_tid(tid, &taglist);
1155 trackdb_abort_transaction(tid);
1157 trackdb_commit_transaction(tid);
1161 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1168 c = trackdb_opencursor(trackdb_tagsdb, tid);
1169 memset(&k, 0, sizeof k);
1170 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1171 vector_append(&v, xstrndup(k.data, k.size));
1175 case DB_LOCK_DEADLOCK:
1178 fatal(0, "c->c_get: %s", db_strerror(err));
1180 if((err = trackdb_closecursor(c))) return err;
1181 vector_terminate(&v);
1186 /* return 1 iff sorted tag lists A and B have at least one member in common */
1187 static int tag_intersection(char **a, char **b) {
1190 /* Same sort of logic as trackdb_set() above */
1192 if(!(cmp = strcmp(*a, *b))) return 1;
1193 else if(cmp < 0) ++a;
1199 /* Check whether a track is suitable for random play. Returns 0 if it is,
1200 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1202 static int check_suitable(const char *track,
1204 char **required_tags,
1205 char **prohibited_tags) {
1209 const char *pick_at_random, *played_time;
1211 /* don't pick tracks that aren't in any surviving collection (for instance
1212 * you've edited the config but the rescan hasn't done its job yet) */
1213 if(!find_track_root(track)) {
1214 info("found track not in any collection: %s", track);
1217 /* don't pick aliases - only pick the canonical form */
1218 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1219 return DB_LOCK_DEADLOCK;
1220 if(kvp_get(t, "_alias_for"))
1222 /* check that random play is not suppressed for this track */
1223 if((pick_at_random = kvp_get(p, "pick_at_random"))
1224 && !strcmp(pick_at_random, "0"))
1226 /* don't pick a track that's been played in the last 8 hours */
1227 if((played_time = kvp_get(p, "played_time"))) {
1228 last = atoll(played_time);
1230 if(now < last + 8 * 3600) /* TODO configurable */
1233 track_tags = parsetags(kvp_get(p, "tags"));
1234 /* check that no prohibited tag is present for this track */
1235 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1237 /* check that at least one required tags is present for this track */
1238 if(*required_tags && !tag_intersection(track_tags, required_tags))
1243 /* attempt to pick a random non-alias track */
1244 const char *trackdb_random(int tries) {
1249 const char *track, *candidate;
1252 char **required_tags, **prohibited_tags, **tp;
1257 tid = trackdb_begin_transaction();
1258 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1260 required_tags = parsetags(tags);
1261 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1263 prohibited_tags = parsetags(tags);
1265 if(*required_tags) {
1266 /* Bung all the suitable tracks into a hash and convert to a list of keys
1267 * (to eliminate duplicates). We cache this list since it is possible
1268 * that it will be very large. */
1271 for(tp = required_tags; *tp; ++tp) {
1272 c = trackdb_opencursor(trackdb_tagsdb, tid);
1273 memset(&key, 0, sizeof key);
1275 key.size = strlen(*tp);
1277 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1279 hash_add(h, xstrndup(data.data, data.size), 0,
1280 HASH_INSERT_OR_REPLACE);
1282 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1288 case DB_LOCK_DEADLOCK:
1291 fatal(0, "error querying tags.db: %s", db_strerror(err));
1293 trackdb_closecursor(c);
1296 error(0, "required tag %s does not match any tracks", *tp);
1298 nreqtracks = hash_count(h);
1299 reqtracks = hash_keys(h);
1301 while(nreqtracks && !track && tries-- > 0) {
1302 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1303 candidate = reqtracks[r];
1304 switch(check_suitable(candidate, tid,
1305 required_tags, prohibited_tags)) {
1311 case DB_LOCK_DEADLOCK:
1316 /* No required tags. We pick random record numbers in the database
1318 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1321 case DB_LOCK_DEADLOCK:
1322 error(0, "error querying tracks.db: %s", db_strerror(err));
1325 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1328 error(0, "cannot pick tracks at random from an empty database");
1329 while(sp->bt_nkeys && !track && tries-- > 0) {
1330 /* record numbers count from 1 upwards */
1331 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1332 memset(&key, sizeof key, 0);
1333 key.flags = DB_DBT_MALLOC;
1334 key.size = sizeof r;
1336 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1340 case DB_LOCK_DEADLOCK:
1341 error(0, "error querying tracks.db: %s", db_strerror(err));
1344 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1346 candidate = xstrndup(key.data, key.size);
1347 switch(check_suitable(candidate, tid,
1348 required_tags, prohibited_tags)) {
1354 case DB_LOCK_DEADLOCK:
1361 trackdb_closecursor(c);
1363 trackdb_abort_transaction(tid);
1365 trackdb_commit_transaction(tid);
1367 error(0, "could not pick a random track");
1371 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1372 * from the prefs. */
1373 static const char *getpart(const char *track,
1374 const char *context,
1376 const struct kvp *p,
1381 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1382 if((result = kvp_get(p, pref)))
1385 result = trackname_part(track, context, part);
1386 assert(result != 0);
1390 /* get a track name part, like trackname_part(), but taking the database into
1392 const char *trackdb_getpart(const char *track,
1393 const char *context,
1401 /* construct the full pref */
1402 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1404 tid = trackdb_begin_transaction();
1405 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1409 trackdb_abort_transaction(tid);
1411 trackdb_commit_transaction(tid);
1412 return getpart(actual, context, part, p, &used_db);
1415 /* get the raw path name for @track@ (might be an alias) */
1416 const char *trackdb_rawpath(const char *track) {
1422 tid = trackdb_begin_transaction();
1423 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1427 trackdb_abort_transaction(tid);
1429 trackdb_commit_transaction(tid);
1430 if(!(path = kvp_get(t, "_path"))) path = track;
1434 /* trackdb_list **************************************************************/
1436 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1437 * readable at some point */
1439 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1440 * If RE is a null pointer then it matches everything. */
1441 static int track_matches(size_t dl, const char *track, size_t tl,
1449 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1450 case PCRE_ERROR_NOMATCH: return 0;
1453 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1460 static int do_list(struct vector *v, const char *dir,
1461 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1467 size_t l, last_dir_len = 0;
1468 char *last_dir = 0, *track, *alias;
1472 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1475 /* find the first key >= dir */
1476 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1477 /* keep going while we're dealing with <dir/anything> */
1480 && ((char *)k.data)[dl] == '/'
1481 && !memcmp(k.data, dir, dl)) {
1482 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1484 /* we have <dir/component/anything>, so <dir/component> is a directory */
1485 l = ptr - (char *)k.data;
1486 if(what & trackdb_directories)
1488 && l == last_dir_len
1489 && !memcmp(last_dir, k.data, l))) {
1490 last_dir = xstrndup(k.data, last_dir_len = l);
1491 if(track_matches(dl, k.data, l, re))
1492 vector_append(v, last_dir);
1495 /* found a plain file */
1496 if((what & trackdb_files)) {
1497 track = xstrndup(k.data, k.size);
1498 if((err = trackdb_getdata(trackdb_prefsdb,
1499 track, &p, tid)) == DB_LOCK_DEADLOCK)
1501 /* if this file has an alias in the same directory then we skip it */
1502 if((err = compute_alias(&alias, track, p, tid)))
1504 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1505 if(track_matches(dl, k.data, k.size, re))
1506 vector_append(v, track);
1509 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1517 case DB_LOCK_DEADLOCK:
1518 error(0, "error querying database: %s", db_strerror(err));
1521 fatal(0, "error querying database: %s", db_strerror(err));
1524 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1528 /* return the directories or files below @dir@ */
1529 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1537 tid = trackdb_begin_transaction();
1540 if(do_list(&v, dir, what, re, tid))
1543 for(n = 0; n < config->collection.n; ++n)
1544 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1549 trackdb_abort_transaction(tid);
1551 trackdb_commit_transaction(tid);
1552 vector_terminate(&v);
1558 /* If S is tag:something, return something. Else return 0. */
1559 static const char *checktag(const char *s) {
1560 if(!strncmp(s, "tag:", 4))
1566 /* return a list of tracks containing all of the words given. If you
1567 * ask for only stopwords you get no tracks. */
1568 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1569 const char **w, *best = 0, *tag;
1570 char **twords, **tags;
1571 int i, j, n, err, what;
1581 *ntracks = 0; /* for early returns */
1582 /* casefold all the words */
1583 w = xmalloc(nwordlist * sizeof (char *));
1584 for(n = 0; n < nwordlist; ++n) {
1585 w[n] = casefold(wordlist[n]);
1586 if(checktag(w[n])) ++ntags; /* count up tags */
1588 /* find the longest non-stopword */
1589 for(n = 0; n < nwordlist; ++n)
1590 if(!stopword(w[n]) && !checktag(w[n]))
1591 if(!best || strlen(w[n]) > strlen(best))
1593 /* TODO: we should at least in principal be able to identify the word or tag
1594 * with the least matches in log time, and choose that as our primary search
1596 if(ntags && !best) {
1597 /* Only tags are listed. We limit to the first and narrow down with the
1599 best = checktag(w[0]);
1600 db = trackdb_tagsdb;
1603 /* We can limit to some word. */
1604 db = trackdb_searchdb;
1607 /* Only stopwords */
1613 tid = trackdb_begin_transaction();
1614 /* find all the tracks that have that word */
1619 cursor = trackdb_opencursor(db, tid);
1620 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1621 vector_append(&v, xstrndup(d.data, d.size));
1628 case DB_LOCK_DEADLOCK:
1629 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1632 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1634 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1636 /* do a naive search over that (hopefuly fairly small) list of tracks */
1638 for(n = 0; n < v.nvec; ++n) {
1639 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1642 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1645 twords = track_to_words(v.vec[n], p);
1646 tags = parsetags(kvp_get(p, "tags"));
1647 for(i = 0; i < nwordlist; ++i) {
1648 if((tag = checktag(w[i]))) {
1649 /* Track must have this tag */
1650 for(j = 0; tags[j]; ++j)
1651 if(!strcmp(tag, tags[j])) break; /* tag found */
1652 if(!tags[j]) break; /* tag not found */
1654 /* Track must contain this word */
1655 for(j = 0; twords[j]; ++j)
1656 if(!strcmp(w[i], twords[j])) break; /* word found */
1657 if(!twords[j]) break; /* word not found */
1660 if(i >= nwordlist) /* all words found */
1661 vector_append(&u, v.vec[n]);
1665 trackdb_closecursor(cursor);
1667 trackdb_abort_transaction(tid);
1668 info("retrying search");
1670 trackdb_commit_transaction(tid);
1671 vector_terminate(&u);
1677 /* trackdb_scan **************************************************************/
1679 int trackdb_scan(const char *root,
1680 int (*callback)(const char *track,
1688 const size_t root_len = root ? strlen(root) : 0;
1693 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1695 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1698 memset(&k, 0, sizeof k);
1699 err = cursor->c_get(cursor, &k, prepare_data(&d),
1704 || (k.size > root_len
1705 && !strncmp(k.data, root, root_len)
1706 && ((char *)k.data)[root_len] == '/')) {
1707 data = kvp_urldecode(d.data, d.size);
1708 if(kvp_get(data, "_path")) {
1709 track = xstrndup(k.data, k.size);
1710 /* Advance to the next track before the callback so that the callback
1711 * may safely delete the track */
1712 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1713 if((cberr = callback(track, data, u, tid))) {
1718 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1722 trackdb_closecursor(cursor);
1729 case DB_LOCK_DEADLOCK:
1730 error(0, "c->c_get: %s", db_strerror(err));
1733 fatal(0, "c->c_get: %s", db_strerror(err));
1737 /* trackdb_rescan ************************************************************/
1739 /* called when the rescanner terminates */
1740 static int reap_rescan(ev_source attribute((unused)) *ev,
1743 const struct rusage attribute((unused)) *rusage,
1744 void attribute((unused)) *u) {
1745 if(pid == rescan_pid) rescan_pid = -1;
1747 error(0, "disorderd-rescan: %s", wstat(status));
1749 D(("disorderd-rescan terminate: %s", wstat(status)));
1750 /* Our cache of file lookups is out of date now */
1751 cache_clean(&cache_files_type);
1752 eventlog("rescanned", (char *)0);
1756 void trackdb_rescan(ev_source *ev) {
1757 if(rescan_pid != -1) {
1758 error(0, "rescan already underway");
1761 rescan_pid = subprogram(ev, RESCAN);
1762 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1763 D(("started rescanner"));
1767 int trackdb_rescan_cancel(void) {
1768 if(rescan_pid == -1) return 0;
1769 if(kill(rescan_pid, SIGTERM) < 0)
1770 fatal(errno, "error killing rescanner");
1775 /* global prefs **************************************************************/
1777 void trackdb_set_global(const char *name,
1785 memset(&k, 0, sizeof k);
1786 memset(&d, 0, sizeof d);
1787 k.data = (void *)name;
1788 k.size = strlen(name);
1790 d.data = (void *)value;
1791 d.size = strlen(value);
1794 tid = trackdb_begin_transaction();
1796 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
1798 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
1799 if(!err || err == DB_NOTFOUND) break;
1800 if(err != DB_LOCK_DEADLOCK)
1801 fatal(0, "error updating database: %s", db_strerror(err));
1802 trackdb_abort_transaction(tid);
1804 trackdb_commit_transaction(tid);
1805 /* log important state changes */
1806 if(!strcmp(name, "playing")) {
1807 state = !value || !strcmp(value, "yes");
1808 info("playing %s by %s",
1809 state ? "enabled" : "disabled",
1811 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
1813 if(!strcmp(name, "random-play")) {
1814 state = !value || !strcmp(value, "yes");
1815 info("random play %s by %s",
1816 state ? "enabled" : "disabled",
1818 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
1820 if(!strcmp(name, "required-tags"))
1824 const char *trackdb_get_global(const char *name) {
1830 tid = trackdb_begin_transaction();
1831 if(!(err = trackdb_get_global_tid(name, tid, &r)))
1833 trackdb_abort_transaction(tid);
1835 trackdb_commit_transaction(tid);
1839 static int trackdb_get_global_tid(const char *name,
1845 memset(&k, 0, sizeof k);
1846 k.data = (void *)name;
1847 k.size = strlen(name);
1848 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
1849 prepare_data(&d), 0)) {
1851 *rp = xstrndup(d.data, d.size);
1856 case DB_LOCK_DEADLOCK:
1859 fatal(0, "error updating database: %s", db_strerror(err));
1863 /** @brief Retrieve the most recently added tracks
1864 * @param ntracksp Where to put count, or 0
1865 * @param maxtracks Maximum number of tracks to retrieve
1866 * @return null-terminated array of track names
1868 * The most recently added track is first in the array.
1870 char **trackdb_new(int *ntracksp,
1876 tid = trackdb_begin_transaction();
1877 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
1880 trackdb_abort_transaction(tid);
1882 trackdb_commit_transaction(tid);
1886 /** @brief Retrieve the most recently added tracks
1887 * @param ntracksp Where to put count, or 0
1888 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1889 * @param tid Transaction ID
1890 * @return null-terminated array of track names, or NULL on deadlock
1892 * The most recently added track is first in the array.
1894 static char **trackdb_new_tid(int *ntracksp,
1900 struct vector tracks[1];
1902 vector_init(tracks);
1903 c = trackdb_opencursor(trackdb_noticeddb, tid);
1904 while((maxtracks <= 0 || tracks->nvec < maxtracks)
1905 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
1906 vector_append(tracks, xstrndup(d.data, d.size));
1908 case 0: /* hit maxtracks */
1909 case DB_NOTFOUND: /* ran out of tracks */
1911 case DB_LOCK_DEADLOCK:
1912 trackdb_closecursor(c);
1915 fatal(0, "error reading noticed.db: %s", db_strerror(err));
1917 if((err = trackdb_closecursor(c)))
1918 return 0; /* deadlock */
1919 vector_terminate(tracks);
1921 *ntracksp = tracks->nvec;
1925 /** @brief Expire noticed.db
1926 * @param earliest Earliest timestamp to keep
1928 void trackdb_expire_noticed(time_t earliest) {
1932 tid = trackdb_begin_transaction();
1933 if(!trackdb_expire_noticed_tid(earliest, tid))
1935 trackdb_abort_transaction(tid);
1937 trackdb_commit_transaction(tid);
1940 /** @brief Expire noticed.db
1941 * @param earliest Earliest timestamp to keep
1942 * @param tid Transaction ID
1943 * @return 0 or DB_LOCK_DEADLOCK
1945 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
1953 c = trackdb_opencursor(trackdb_noticeddb, tid);
1954 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
1956 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
1957 if(when >= earliest)
1959 if((err = c->c_del(c, 0))) {
1960 if(err != DB_LOCK_DEADLOCK)
1961 fatal(0, "error deleting expired noticed.db entry: %s",
1967 if(err == DB_NOTFOUND)
1969 if(err && err != DB_LOCK_DEADLOCK)
1970 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
1972 if((err = trackdb_closecursor(c))) {
1973 if(err != DB_LOCK_DEADLOCK)
1974 fatal(0, "error closing cursor: %s", db_strerror(err));
1978 info("expired %d tracks from noticed.db", count);
1982 /* tidying up ****************************************************************/
1984 void trackdb_gc(void) {
1988 if((err = trackdb_env->txn_checkpoint(trackdb_env,
1989 config->checkpoint_kbyte,
1990 config->checkpoint_min,
1992 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
1993 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
1994 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
1995 /* This makes catastrophic recovery impossible. However, the user can still
1996 * preserve the important data by using disorder-dump to snapshot their
1997 * prefs, and later to restore it. This is likely to have much small
1998 * long-term storage requirements than record the db logfiles. */
2006 indent-tabs-mode:nil