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
20 /** @file server/trackdb.c
21 * @brief Track database */
29 #include <sys/socket.h>
36 #include <sys/resource.h>
38 #include <arpa/inet.h>
46 #include "configuration.h"
51 #include "trackname.h"
52 #include "trackdb-int.h"
60 #define RESCAN "disorder-rescan"
61 #define DEADLOCK "disorder-deadlock"
63 static const char *getpart(const char *track,
68 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
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 */
82 /** @brief The tracks database
83 * - Keys are UTF-8(NFC(unicode(path name)))
84 * - Values are encoded key-value pairs
85 * - Data is reconstructable data about tracks that currently exist
89 /** @brief The preferences database
91 * - Keys are UTF-8(NFC(unicode(path name)))
92 * - Values are encoded key-value pairs
93 * - Data is user data about tracks (that might not exist any more)
94 * and cannot be reconstructed
98 /** @brief The search database
100 * - Keys are UTF-8(NFKC(casefold(search term)))
101 * - Values are UTF-8(NFC(unicode(path name)))
102 * - There can be more than one value per key
103 * - Presence of key,value means that path matches the search terms
104 * - Only tracks fond in @ref tracks_tracksdb are represented here
105 * - This database can be reconstructed, it contains no user data
107 DB *trackdb_searchdb;
109 /** @brief The tags database
111 * - Keys are UTF-8(NFKC(casefold(tag)))
112 * - Values are UTF-8(NFC(unicode(path name)))
113 * - There can be more than one value per key
114 * - Presence of key,value means that path matches the tag
115 * - This is always in sync with the tags preference
116 * - This database can be reconstructed, it contains no user data
118 DB *trackdb_tagsdb; /* the tags database */
120 /** @brief The global preferences database
121 * - Keys are UTF-8(NFC(preference))
122 * - Values are global preference values
123 * - Data is user data and cannot be reconstructed
125 DB *trackdb_globaldb; /* global preferences */
127 /** @brief The noticed database
128 * - Keys are 64-bit big-endian timestamps
129 * - Values are UTF-8(NFC(unicode(path name)))
130 * - There can be more than one value per key
131 * - Presence of key,value means that path was added at the given time
132 * - Data cannot be reconstructed (but isn't THAT important)
134 DB *trackdb_noticeddb; /* when track noticed */
135 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
136 static pid_t rescan_pid = -1; /* rescanner PID */
137 static int initialized, opened; /* state */
139 /* tracks matched by required_tags */
140 static char **reqtracks;
141 static size_t nreqtracks;
143 /* comparison function for keys */
144 static int compare(DB attribute((unused)) *db_,
145 const DBT *a, const DBT *b) {
146 return compare_path_raw(a->data, a->size, b->data, b->size);
149 /** @brief Open database environment
150 * @param flags Flags word
152 * Flags should be one of:
153 * - @ref TRACKDB_NO_RECOVER
154 * - @ref TRACKDB_NORMAL_RECOVER
155 * - @ref TRACKDB_FATAL_RECOVER
157 void trackdb_init(int flags) {
159 const int recover = flags & TRACKDB_RECOVER_MASK;
160 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
163 assert(initialized == 0);
166 if(strcmp(home, config->home))
167 fatal(0, "cannot change db home without server restart");
171 /* create environment */
172 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
174 if((err = trackdb_env->set_alloc(trackdb_env,
175 xmalloc_noptr, xrealloc_noptr, xfree)))
176 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
177 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
178 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
179 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
180 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
181 if((err = trackdb_env->open(trackdb_env, config->home,
187 |recover_type[recover],
189 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
190 trackdb_env->set_errpfx(trackdb_env, "DB");
191 trackdb_env->set_errfile(trackdb_env, stderr);
192 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
193 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
194 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
195 D(("initialized database environment"));
198 /* called when deadlock manager terminates */
199 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
200 pid_t attribute((unused)) pid,
202 const struct rusage attribute((unused)) *rusage,
203 void attribute((unused)) *u) {
204 db_deadlock_pid = -1;
206 fatal(0, "deadlock manager unexpectedly terminated: %s",
209 D(("deadlock manager terminated: %s", wstat(status)));
213 static pid_t subprogram(ev_source *ev, const char *prog,
217 /* If we're in the background then trap subprocess stdout/stderr */
218 if(!(pid = xfork())) {
220 ev_signal_atfork(ev);
221 signal(SIGPIPE, SIG_DFL);
226 /* If we were negatively niced, undo it. We don't bother checking for
227 * error, it's not that important. */
228 setpriority(PRIO_PROCESS, 0, 0);
229 execlp(prog, prog, "--config", configfile,
230 debugging ? "--debug" : "--no-debug",
231 log_default == &log_syslog ? "--syslog" : "--no-syslog",
233 fatal(errno, "error invoking %s", prog);
238 /* start deadlock manager */
239 void trackdb_master(ev_source *ev) {
240 assert(db_deadlock_pid == -1);
241 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
242 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
243 D(("started deadlock manager"));
246 /* close environment */
247 void trackdb_deinit(void) {
251 assert(initialized == 1);
254 /* close the environment */
255 if((err = trackdb_env->close(trackdb_env, 0)))
256 fatal(0, "trackdb_env->close: %s", db_strerror(err));
258 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
259 fatal(errno, "error killing rescanner");
261 /* terminate the deadlock manager */
262 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
263 fatal(errno, "error killing deadlock manager");
264 db_deadlock_pid = -1;
266 D(("deinitialized database environment"));
269 /* open a specific database */
270 static DB *open_db(const char *path,
278 D(("open %s", path));
279 path = config_get_file(path);
280 if((err = db_create(&db, trackdb_env, 0)))
281 fatal(0, "db_create %s: %s", path, db_strerror(err));
283 if((err = db->set_flags(db, dbflags)))
284 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
285 if(dbtype == DB_BTREE)
286 if((err = db->set_bt_compare(db, compare)))
287 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
288 if((err = db->open(db, 0, path, 0, dbtype,
289 openflags | DB_AUTO_COMMIT, mode))) {
290 if((openflags & DB_CREATE) || errno != ENOENT)
291 fatal(0, "db->open %s: %s", path, db_strerror(err));
298 /** @brief Open track databases
299 * @param Flags flags word
301 * @p flags should be one of:
302 * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted
303 * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted
304 * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade
306 void trackdb_open(int flags) {
312 /* check the database version first */
313 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
314 if(trackdb_globaldb) {
315 /* This is an existing database */
319 s = trackdb_get_global("_dbversion");
320 /* Close the database again, we'll open it property below */
321 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
322 fatal(0, "error closing global.db: %s", db_strerror(err));
323 trackdb_globaldb = 0;
324 /* Convert version string to an integer */
325 oldversion = s ? atol(s) : 1;
326 if(oldversion > config->dbversion) {
327 /* Database is from the future; we never allow this. */
328 fatal(0, "this version of DisOrder is too old for database version %ld",
331 if(oldversion < config->dbversion) {
332 /* Database version is out of date */
333 switch(flags & TRACKDB_UPGRADE_MASK) {
334 case TRACKDB_NO_UPGRADE:
335 /* This database needs upgrading but this is not permitted */
336 fatal(0, "database needs upgrading from %ld to %ld",
337 oldversion, config->dbversion);
338 case TRACKDB_CAN_UPGRADE:
339 /* This database needs upgrading */
340 fatal(0, "database needs upgrading from %ld to %ld, which is not yet supported",
341 oldversion, config->dbversion);
342 case TRACKDB_OPEN_FOR_UPGRADE:
348 if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) {
349 /* This doesn't make any sense */
350 fatal(0, "database is already at current version");
354 if(flags & TRACKDB_OPEN_FOR_UPGRADE) {
355 /* Cannot upgrade a new database */
356 fatal(0, "cannot upgrade a database that does not exist");
358 /* This is a brand new database */
361 /* open the databases */
362 trackdb_tracksdb = open_db("tracks.db",
363 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
364 trackdb_searchdb = open_db("search.db",
365 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
366 trackdb_tagsdb = open_db("tags.db",
367 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
368 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
369 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
370 trackdb_noticeddb = open_db("noticed.db",
371 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
373 /* Stash the database version */
376 assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE));
377 snprintf(buf, sizeof buf, "%ld", config->dbversion);
378 trackdb_set_global("_dbversion", buf, 0);
380 D(("opened databases"));
383 /* close track databases */
384 void trackdb_close(void) {
390 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
391 fatal(0, "error closing tracks.db: %s", db_strerror(err));
392 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
393 fatal(0, "error closing search.db: %s", db_strerror(err));
394 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
395 fatal(0, "error closing tags.db: %s", db_strerror(err));
396 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
397 fatal(0, "error closing prefs.db: %s", db_strerror(err));
398 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
399 fatal(0, "error closing global.db: %s", db_strerror(err));
400 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
401 fatal(0, "error closing noticed.db: %s", db_strerror(err));
402 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
403 trackdb_tagsdb = trackdb_globaldb = 0;
404 D(("closed databases"));
407 /* generic db routines *******************************************************/
409 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
410 * DB_LOCK_DEADLOCK. */
411 int trackdb_getdata(DB *db,
418 switch(err = db->get(db, tid, make_key(&key, track),
419 prepare_data(&data), 0)) {
421 *kp = kvp_urldecode(data.data, data.size);
426 case DB_LOCK_DEADLOCK:
427 error(0, "error querying database: %s", db_strerror(err));
430 fatal(0, "error querying database: %s", db_strerror(err));
434 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
435 * DB_LOCK_DEADLOCK. */
436 int trackdb_putdata(DB *db,
444 switch(err = db->put(db, tid, make_key(&key, track),
445 encode_data(&data, k), flags)) {
449 case DB_LOCK_DEADLOCK:
450 error(0, "error updating database: %s", db_strerror(err));
453 fatal(0, "error updating database: %s", db_strerror(err));
457 /* delete a database entry */
458 int trackdb_delkey(DB *db,
464 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
468 case DB_LOCK_DEADLOCK:
469 error(0, "error updating database: %s", db_strerror(err));
472 fatal(0, "error updating database: %s", db_strerror(err));
476 /* open a database cursor */
477 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
481 switch(err = db->cursor(db, tid, &c, 0)) {
483 default: fatal(0, "error creating cursor: %s", db_strerror(err));
488 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
489 int trackdb_closecursor(DBC *c) {
493 switch(err = c->c_close(c)) {
496 case DB_LOCK_DEADLOCK:
497 error(0, "error closing cursor: %s", db_strerror(err));
500 fatal(0, "error closing cursor: %s", db_strerror(err));
504 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
505 int trackdb_delkeydata(DB *db,
513 c = trackdb_opencursor(db, tid);
514 switch(err = c->c_get(c, make_key(&key, word),
515 make_key(&data, track), DB_GET_BOTH)) {
517 switch(err = c->c_del(c, 0)) {
523 case DB_LOCK_DEADLOCK:
524 error(0, "error updating database: %s", db_strerror(err));
527 fatal(0, "c->c_del: %s", db_strerror(err));
532 case DB_LOCK_DEADLOCK:
533 error(0, "error updating database: %s", db_strerror(err));
536 fatal(0, "c->c_get: %s", db_strerror(err));
538 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
542 /* start a transaction */
543 DB_TXN *trackdb_begin_transaction(void) {
547 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
548 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
552 /* abort transaction */
553 void trackdb_abort_transaction(DB_TXN *tid) {
557 if((err = tid->abort(tid)))
558 fatal(0, "tid->abort: %s", db_strerror(err));
561 /* commit transaction */
562 void trackdb_commit_transaction(DB_TXN *tid) {
565 if((err = tid->commit(tid, 0)))
566 fatal(0, "tid->commit: %s", db_strerror(err));
569 /* search/tags shared code ***************************************************/
571 /* comparison function used by dedupe() */
572 static int wordcmp(const void *a, const void *b) {
573 return strcmp(*(const char **)a, *(const char **)b);
576 /* sort and de-dupe VEC */
577 static char **dedupe(char **vec, int nvec) {
580 qsort(vec, nvec, sizeof (char *), wordcmp);
584 for(n = 1; n < nvec; ++n)
585 if(strcmp(vec[n], vec[m - 1]))
592 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
593 static int register_word(DB *db, const char *what,
594 const char *track, const char *word,
599 switch(err = db->put(db, tid, make_key(&key, word),
600 make_key(&data, track), DB_NODUPDATA)) {
604 case DB_LOCK_DEADLOCK:
605 error(0, "error updating %s.db: %s", what, db_strerror(err));
608 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
612 /* search primitives *********************************************************/
614 /* return true iff NAME is a trackname_display_ pref */
615 static int is_display_pref(const char *name) {
616 static const char prefix[] = "trackname_display_";
617 return !strncmp(name, prefix, (sizeof prefix) - 1);
620 /** @brief Word_Break property tailor that treats underscores as spaces */
621 static int tailor_underscore_Word_Break_Other(uint32_t c) {
625 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
626 return unicode_Word_Break_Other;
630 /** @brief Normalize and split a string using a given tailoring */
631 static void word_split(struct vector *v,
633 unicode_property_tailor *pt) {
635 uint32_t *t32, **w32;
637 /* Convert to UTF-32 */
638 if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32)))
640 /* Erase case distinctions */
641 if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32)))
643 /* Split into words, treating _ as a space */
644 w32 = utf32_word_split(t32, nt32, &nw, pt);
645 /* Convert words back to UTF-8 and append to result */
646 for(i = 0; i < nw; ++i)
647 vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
650 /* compute the words of a track name */
651 static char **track_to_words(const char *track,
652 const struct kvp *p) {
654 const char *rootless = track_rootless(track);
657 rootless = track; /* bodge */
659 rootless = strip_extension(rootless);
660 word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other);
661 for(; p; p = p->next)
662 if(is_display_pref(p->name))
663 word_split(&v, p->value, 0);
664 vector_terminate(&v);
665 return dedupe(v.vec, v.nvec);
668 /* return nonzero iff WORD is a stopword */
669 static int stopword(const char *word) {
672 for(n = 0; n < config->stopword.n
673 && strcmp(word, config->stopword.s[n]); ++n)
675 return n < config->stopword.n;
678 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
679 static int register_search_word(const char *track, const char *word,
681 if(stopword(word)) return 0;
682 return register_word(trackdb_searchdb, "search", track, word, tid);
685 /* Tags **********************************************************************/
687 /* Return nonzero if C is a valid tag character */
688 static int tagchar(int c) {
697 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
698 static char **parsetags(const char *s) {
704 /* skip initial separators */
705 while(*s && (!tagchar(*s) || *s == ' '))
708 /* find the extent of the tag */
710 while(*s && tagchar(*s))
712 /* strip trailing spaces */
713 while(s > t && s[-1] == ' ')
715 vector_append(&v, xstrndup(t, s - t));
716 /* skip intermediate and trailing separators */
717 while(*s && (!tagchar(*s) || *s == ' '))
721 vector_terminate(&v);
722 return dedupe(v.vec, v.nvec);
725 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
726 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
727 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
730 /* aliases *******************************************************************/
732 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
733 * there is no alias sets *aliasp to 0. */
734 static int compute_alias(char **aliasp,
739 const char *s = config->alias, *t, *expansion, *part;
740 int c, used_db = 0, slash_prefix, err;
742 const char *const root = find_track_root(track);
745 /* Bodge for tracks with no root */
750 dynstr_append_string(&d, root);
751 while((c = (unsigned char)*s++)) {
753 dynstr_append(&d, c);
756 if((slash_prefix = (*s == '/')))
759 assert(t != 0); /* validated at startup */
760 part = xstrndup(s, t - s);
761 expansion = getpart(track, "display", part, p, &used_db);
763 if(slash_prefix) dynstr_append(&d, '/');
764 dynstr_append_string(&d, expansion);
766 s = t + 1; /* skip {part} */
768 /* only admit to the alias if we used the db... */
773 dynstr_terminate(&d);
774 /* ...and the answer differs from the original... */
775 if(!strcmp(track, d.vec)) {
779 /* ...and there isn't already a different track with that name (including as
781 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
783 if((s = kvp_get(at, "_alias_for"))
784 && !strcmp(s, track)) {
796 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
797 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
798 * Always sets the return values, even if only to null pointers. */
799 static int gettrackdata(const char *track,
802 const char **actualp,
804 #define GTD_NOALIAS 0x0001
807 const char *actual = track;
808 struct kvp *t = 0, *p = 0;
810 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
811 if((actual = kvp_get(t, "_alias_for"))) {
812 if(flags & GTD_NOALIAS) {
813 error(0, "alias passed to gettrackdata where real path required");
816 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
821 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
826 if(actualp) *actualp = actual;
832 /* trackdb_notice() **********************************************************/
834 /** @brief notice a possibly new track
835 * @return @c DB_NOTFOUND if new, 0 if already known
837 int trackdb_notice(const char *track,
843 tid = trackdb_begin_transaction();
844 err = trackdb_notice_tid(track, path, tid);
845 if((err == DB_LOCK_DEADLOCK)) goto fail;
848 trackdb_abort_transaction(tid);
850 trackdb_commit_transaction(tid);
854 /** @brief notice a possibly new track
855 * @param track NFC UTF-8 track name
856 * @param path Raw path name
857 * @param tid Transaction ID
858 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
860 int trackdb_notice_tid(const char *track,
864 struct kvp *t, *a, *p;
868 /* notice whether the tracks.db entry changes */
870 /* get any existing tracks entry */
871 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
873 ret = err; /* 0 or DB_NOTFOUND */
874 /* this is a real track */
875 t_changed += kvp_set(&t, "_alias_for", 0);
876 t_changed += kvp_set(&t, "_path", path);
877 /* if we have an alias record it in the database */
878 if((err = compute_alias(&alias, track, p, tid))) return err;
880 /* won't overwrite someone else's alias as compute_alias() checks */
881 D(("%s: alias %s", track, alias));
883 kvp_set(&a, "_alias_for", track);
884 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
886 /* update search.db */
887 w = track_to_words(track, p);
888 for(n = 0; w[n]; ++n)
889 if((err = register_search_word(track, w[n], tid)))
892 w = parsetags(kvp_get(p, "tags"));
893 for(n = 0; w[n]; ++n)
894 if((err = register_tag(track, w[n], tid)))
897 /* only store the tracks.db entry if it has changed */
898 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
900 if(ret == DB_NOTFOUND) {
901 uint32_t timestamp[2];
906 timestamp[0] = htonl((uint64_t)now >> 32);
907 timestamp[1] = htonl((uint32_t)now);
908 memset(&key, 0, sizeof key);
909 key.data = timestamp;
910 key.size = sizeof timestamp;
911 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
912 make_key(&data, track), 0)) {
914 case DB_LOCK_DEADLOCK: return err;
915 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
921 /* trackdb_obsolete() ********************************************************/
923 /* obsolete a track */
924 int trackdb_obsolete(const char *track, DB_TXN *tid) {
929 if((err = gettrackdata(track, 0, &p, 0,
930 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
932 else if(err == DB_NOTFOUND) return 0;
933 /* compute the alias, if any, and delete it */
934 if(compute_alias(&alias, track, p, tid)) return err;
936 /* if the alias points to some other track then compute_alias won't
938 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
941 /* update search.db */
942 w = track_to_words(track, p);
943 for(n = 0; w[n]; ++n)
944 if(trackdb_delkeydata(trackdb_searchdb,
945 w[n], track, tid) == DB_LOCK_DEADLOCK)
948 w = parsetags(kvp_get(p, "tags"));
949 for(n = 0; w[n]; ++n)
950 if(trackdb_delkeydata(trackdb_tagsdb,
951 w[n], track, tid) == DB_LOCK_DEADLOCK)
954 /* update tracks.db */
955 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
957 /* We don't delete the prefs, so they survive temporary outages of the
958 * (possibly virtual) track filesystem */
962 /* trackdb_stats() ***********************************************************/
964 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
965 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
967 static const struct statinfo {
970 } statinfo_hash[] = {
986 }, statinfo_btree[] = {
1007 /* look up stats for DB */
1008 static int get_stats(struct vector *v,
1010 const struct statinfo *si,
1019 switch(err = database->stat(database, tid, &sp, 0)) {
1022 case DB_LOCK_DEADLOCK:
1023 error(0, "error querying database: %s", db_strerror(err));
1026 fatal(0, "error querying database: %s", db_strerror(err));
1028 for(n = 0; n < nsi; ++n) {
1029 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
1030 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
1031 vector_append(v, str);
1037 struct search_entry {
1042 /* find the top COUNT words in the search database */
1043 static int search_league(struct vector *v, int count, DB_TXN *tid) {
1044 struct search_entry *se;
1047 int err, n = 0, nse = 0, i;
1052 cursor = trackdb_opencursor(trackdb_searchdb, tid);
1053 se = xmalloc(count * sizeof *se);
1054 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
1056 if(word && wl == k.size && !strncmp(word, k.data, wl))
1059 #define FINALIZE() do { \
1060 if(word && (nse < count || n > se[nse - 1].n)) { \
1065 while(i > 0 && n > se[i - 1].n) \
1067 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
1068 se[i].word = word; \
1073 word = xstrndup(k.data, wl = k.size);
1081 case DB_LOCK_DEADLOCK:
1082 error(0, "error querying search database: %s", db_strerror(err));
1085 fatal(0, "error querying search database: %s", db_strerror(err));
1087 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1090 byte_xasprintf(&str, "Top %d search words:", nse);
1091 vector_append(v, str);
1092 for(i = 0; i < nse; ++i) {
1093 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1094 vector_append(v, str);
1099 #define SI(what) statinfo_##what, \
1100 sizeof statinfo_##what / sizeof (struct statinfo)
1102 /* return a list of database stats */
1103 char **trackdb_stats(int *nstatsp) {
1109 tid = trackdb_begin_transaction();
1111 vector_append(&v, (char *)"Tracks database stats:");
1112 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1113 vector_append(&v, (char *)"");
1114 vector_append(&v, (char *)"Search database stats:");
1115 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1116 vector_append(&v, (char *)"");
1117 vector_append(&v, (char *)"Prefs database stats:");
1118 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1119 vector_append(&v, (char *)"");
1120 if(search_league(&v, 10, tid)) goto fail;
1121 vector_terminate(&v);
1124 trackdb_abort_transaction(tid);
1126 trackdb_commit_transaction(tid);
1127 if(nstatsp) *nstatsp = v.nvec;
1131 struct stats_details {
1132 void (*done)(char *data, void *u);
1134 int exited; /* subprocess exited */
1135 int closed; /* pipe close */
1136 int wstat; /* wait status from subprocess */
1137 struct dynstr data[1]; /* data read from pipe */
1140 static void stats_complete(struct stats_details *d) {
1143 if(!(d->exited && d->closed))
1145 byte_xasprintf(&s, "\n"
1147 "track lookup cache hits: %lu\n"
1148 "track lookup cache misses: %lu\n",
1150 cache_files_misses);
1151 dynstr_append_string(d->data, s);
1152 dynstr_terminate(d->data);
1153 d->done(d->data->vec, d->u);
1156 static int stats_finished(ev_source attribute((unused)) *ev,
1157 pid_t attribute((unused)) pid,
1159 const struct rusage attribute((unused)) *rusage,
1161 struct stats_details *const d = u;
1165 error(0, "disorder-stats %s", wstat(status));
1170 static int stats_read(ev_source attribute((unused)) *ev,
1176 struct stats_details *const d = u;
1178 dynstr_append_bytes(d->data, ptr, bytes);
1179 ev_reader_consume(reader, bytes);
1186 static int stats_error(ev_source attribute((unused)) *ev,
1189 struct stats_details *const d = u;
1191 error(errno_value, "error reading from pipe to disorder-stats");
1197 void trackdb_stats_subprocess(ev_source *ev,
1198 void (*done)(char *data, void *u),
1202 struct stats_details *d = xmalloc(sizeof *d);
1204 dynstr_init(d->data);
1208 pid = subprogram(ev, "disorder-stats", p[1]);
1210 ev_child(ev, pid, 0, stats_finished, d);
1211 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1214 /* set a pref (remove if value=0) */
1215 int trackdb_set(const char *track,
1217 const char *value) {
1218 struct kvp *t, *p, *a;
1221 char *oldalias, *newalias, **oldtags = 0, **newtags;
1224 /* TODO: if value matches default then set value=0 */
1228 tid = trackdb_begin_transaction();
1229 if((err = gettrackdata(track, &t, &p, 0,
1230 0, tid)) == DB_LOCK_DEADLOCK)
1232 if(err == DB_NOTFOUND) break;
1233 if(name[0] == '_') {
1234 if(kvp_set(&t, name, value))
1235 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1238 /* get the old alias name */
1239 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1240 /* get the old tags */
1241 if(!strcmp(name, "tags"))
1242 oldtags = parsetags(kvp_get(p, "tags"));
1244 if(kvp_set(&p, name, value))
1245 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1247 /* compute the new alias name */
1248 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1249 /* check whether alias has changed */
1250 if(!(oldalias == newalias
1251 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1252 /* adjust alias records to fit change */
1254 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1257 kvp_set(&a, "_alias_for", track);
1258 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1261 /* check whether tags have changed */
1262 if(!strcmp(name, "tags")) {
1263 newtags = parsetags(value);
1264 while(*oldtags || *newtags) {
1265 if(*oldtags && *newtags) {
1266 cmp = strcmp(*oldtags, *newtags);
1268 /* keeping this tag */
1272 /* old tag fits into a gap in the new list, so delete old */
1275 /* new tag fits into a gap in the old list, so insert new */
1277 } else if(*oldtags) {
1278 /* we've run out of new tags, so remaining old ones are to be
1281 if(trackdb_delkeydata(trackdb_tagsdb,
1282 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1286 /* we've run out of old tags, so remainig new ones are to be
1289 if(register_tag(track, *newtags, tid)) goto fail;
1299 trackdb_abort_transaction(tid);
1301 trackdb_commit_transaction(tid);
1302 return err == 0 ? 0 : -1;
1306 const char *trackdb_get(const char *track,
1308 return kvp_get(trackdb_get_all(track), name);
1311 /* get all prefs as a 0-terminated array */
1312 struct kvp *trackdb_get_all(const char *track) {
1313 struct kvp *t, *p, **pp;
1317 tid = trackdb_begin_transaction();
1318 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1322 trackdb_abort_transaction(tid);
1324 trackdb_commit_transaction(tid);
1325 for(pp = &p; *pp; pp = &(*pp)->next)
1332 const char *trackdb_resolve(const char *track) {
1337 tid = trackdb_begin_transaction();
1338 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1342 trackdb_abort_transaction(tid);
1344 trackdb_commit_transaction(tid);
1348 int trackdb_isalias(const char *track) {
1349 const char *actual = trackdb_resolve(track);
1351 return strcmp(actual, track);
1354 /* test whether a track exists (perhaps an alias) */
1355 int trackdb_exists(const char *track) {
1360 tid = trackdb_begin_transaction();
1361 /* unusually, here we want the return value */
1362 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1366 trackdb_abort_transaction(tid);
1368 trackdb_commit_transaction(tid);
1372 /* return the list of tags */
1373 char **trackdb_alltags(void) {
1379 tid = trackdb_begin_transaction();
1380 err = trackdb_alltags_tid(tid, &taglist);
1382 trackdb_abort_transaction(tid);
1384 trackdb_commit_transaction(tid);
1388 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1395 c = trackdb_opencursor(trackdb_tagsdb, tid);
1396 memset(&k, 0, sizeof k);
1397 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1398 vector_append(&v, xstrndup(k.data, k.size));
1402 case DB_LOCK_DEADLOCK:
1405 fatal(0, "c->c_get: %s", db_strerror(err));
1407 if((err = trackdb_closecursor(c))) return err;
1408 vector_terminate(&v);
1413 /* return 1 iff sorted tag lists A and B have at least one member in common */
1414 static int tag_intersection(char **a, char **b) {
1417 /* Same sort of logic as trackdb_set() above */
1419 if(!(cmp = strcmp(*a, *b))) return 1;
1420 else if(cmp < 0) ++a;
1426 /* Check whether a track is suitable for random play. Returns 0 if it is,
1427 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1429 static int check_suitable(const char *track,
1431 char **required_tags,
1432 char **prohibited_tags) {
1436 const char *pick_at_random, *played_time;
1438 /* don't pick tracks that aren't in any surviving collection (for instance
1439 * you've edited the config but the rescan hasn't done its job yet) */
1440 if(!find_track_root(track)) {
1441 info("found track not in any collection: %s", track);
1444 /* don't pick aliases - only pick the canonical form */
1445 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1446 return DB_LOCK_DEADLOCK;
1447 if(kvp_get(t, "_alias_for"))
1449 /* check that random play is not suppressed for this track */
1450 if((pick_at_random = kvp_get(p, "pick_at_random"))
1451 && !strcmp(pick_at_random, "0"))
1453 /* don't pick a track that's been played in the last 8 hours */
1454 if((played_time = kvp_get(p, "played_time"))) {
1455 last = atoll(played_time);
1457 if(now < last + 8 * 3600) /* TODO configurable */
1460 track_tags = parsetags(kvp_get(p, "tags"));
1461 /* check that no prohibited tag is present for this track */
1462 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1464 /* check that at least one required tags is present for this track */
1465 if(*required_tags && !tag_intersection(track_tags, required_tags))
1470 /* attempt to pick a random non-alias track */
1471 const char *trackdb_random(int tries) {
1476 const char *track, *candidate;
1479 char **required_tags, **prohibited_tags, **tp;
1484 tid = trackdb_begin_transaction();
1485 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1487 required_tags = parsetags(tags);
1488 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1490 prohibited_tags = parsetags(tags);
1492 if(*required_tags) {
1493 /* Bung all the suitable tracks into a hash and convert to a list of keys
1494 * (to eliminate duplicates). We cache this list since it is possible
1495 * that it will be very large. */
1498 for(tp = required_tags; *tp; ++tp) {
1499 c = trackdb_opencursor(trackdb_tagsdb, tid);
1500 memset(&key, 0, sizeof key);
1502 key.size = strlen(*tp);
1504 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1506 hash_add(h, xstrndup(data.data, data.size), 0,
1507 HASH_INSERT_OR_REPLACE);
1509 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1515 case DB_LOCK_DEADLOCK:
1518 fatal(0, "error querying tags.db: %s", db_strerror(err));
1520 trackdb_closecursor(c);
1523 error(0, "required tag %s does not match any tracks", *tp);
1525 nreqtracks = hash_count(h);
1526 reqtracks = hash_keys(h);
1528 while(nreqtracks && !track && tries-- > 0) {
1529 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1530 candidate = reqtracks[r];
1531 switch(check_suitable(candidate, tid,
1532 required_tags, prohibited_tags)) {
1538 case DB_LOCK_DEADLOCK:
1543 /* No required tags. We pick random record numbers in the database
1545 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1548 case DB_LOCK_DEADLOCK:
1549 error(0, "error querying tracks.db: %s", db_strerror(err));
1552 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1555 error(0, "cannot pick tracks at random from an empty database");
1556 while(sp->bt_nkeys && !track && tries-- > 0) {
1557 /* record numbers count from 1 upwards */
1558 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1559 memset(&key, sizeof key, 0);
1560 key.flags = DB_DBT_MALLOC;
1561 key.size = sizeof r;
1563 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1567 case DB_LOCK_DEADLOCK:
1568 error(0, "error querying tracks.db: %s", db_strerror(err));
1571 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1573 candidate = xstrndup(key.data, key.size);
1574 switch(check_suitable(candidate, tid,
1575 required_tags, prohibited_tags)) {
1581 case DB_LOCK_DEADLOCK:
1588 trackdb_closecursor(c);
1590 trackdb_abort_transaction(tid);
1592 trackdb_commit_transaction(tid);
1594 error(0, "could not pick a random track");
1598 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1599 * from the prefs. */
1600 static const char *getpart(const char *track,
1601 const char *context,
1603 const struct kvp *p,
1608 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1609 if((result = kvp_get(p, pref)))
1612 result = trackname_part(track, context, part);
1613 assert(result != 0);
1617 /* get a track name part, like trackname_part(), but taking the database into
1619 const char *trackdb_getpart(const char *track,
1620 const char *context,
1628 /* construct the full pref */
1629 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1631 tid = trackdb_begin_transaction();
1632 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1636 trackdb_abort_transaction(tid);
1638 trackdb_commit_transaction(tid);
1639 return getpart(actual, context, part, p, &used_db);
1642 /* get the raw path name for @track@ (might be an alias) */
1643 const char *trackdb_rawpath(const char *track) {
1649 tid = trackdb_begin_transaction();
1650 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1654 trackdb_abort_transaction(tid);
1656 trackdb_commit_transaction(tid);
1657 if(!(path = kvp_get(t, "_path"))) path = track;
1661 /* trackdb_list **************************************************************/
1663 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1664 * readable at some point */
1666 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1667 * If RE is a null pointer then it matches everything. */
1668 static int track_matches(size_t dl, const char *track, size_t tl,
1676 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1677 case PCRE_ERROR_NOMATCH: return 0;
1680 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1687 static int do_list(struct vector *v, const char *dir,
1688 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1694 size_t l, last_dir_len = 0;
1695 char *last_dir = 0, *track, *alias;
1699 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1702 /* find the first key >= dir */
1703 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1704 /* keep going while we're dealing with <dir/anything> */
1707 && ((char *)k.data)[dl] == '/'
1708 && !memcmp(k.data, dir, dl)) {
1709 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1711 /* we have <dir/component/anything>, so <dir/component> is a directory */
1712 l = ptr - (char *)k.data;
1713 if(what & trackdb_directories)
1715 && l == last_dir_len
1716 && !memcmp(last_dir, k.data, l))) {
1717 last_dir = xstrndup(k.data, last_dir_len = l);
1718 if(track_matches(dl, k.data, l, re))
1719 vector_append(v, last_dir);
1722 /* found a plain file */
1723 if((what & trackdb_files)) {
1724 track = xstrndup(k.data, k.size);
1725 if((err = trackdb_getdata(trackdb_prefsdb,
1726 track, &p, tid)) == DB_LOCK_DEADLOCK)
1728 /* if this file has an alias in the same directory then we skip it */
1729 if((err = compute_alias(&alias, track, p, tid)))
1731 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1732 if(track_matches(dl, k.data, k.size, re))
1733 vector_append(v, track);
1736 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1744 case DB_LOCK_DEADLOCK:
1745 error(0, "error querying database: %s", db_strerror(err));
1748 fatal(0, "error querying database: %s", db_strerror(err));
1751 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1755 /* return the directories or files below @dir@ */
1756 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1764 tid = trackdb_begin_transaction();
1767 if(do_list(&v, dir, what, re, tid))
1770 for(n = 0; n < config->collection.n; ++n)
1771 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1776 trackdb_abort_transaction(tid);
1778 trackdb_commit_transaction(tid);
1779 vector_terminate(&v);
1785 /* If S is tag:something, return something. Else return 0. */
1786 static const char *checktag(const char *s) {
1787 if(!strncmp(s, "tag:", 4))
1793 /* return a list of tracks containing all of the words given. If you
1794 * ask for only stopwords you get no tracks. */
1795 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1796 const char **w, *best = 0, *tag;
1797 char **twords, **tags;
1798 int i, j, n, err, what;
1808 *ntracks = 0; /* for early returns */
1809 /* casefold all the words */
1810 w = xmalloc(nwordlist * sizeof (char *));
1811 for(n = 0; n < nwordlist; ++n) {
1812 w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0);
1813 if(checktag(w[n])) ++ntags; /* count up tags */
1815 /* find the longest non-stopword */
1816 for(n = 0; n < nwordlist; ++n)
1817 if(!stopword(w[n]) && !checktag(w[n]))
1818 if(!best || strlen(w[n]) > strlen(best))
1820 /* TODO: we should at least in principal be able to identify the word or tag
1821 * with the least matches in log time, and choose that as our primary search
1823 if(ntags && !best) {
1824 /* Only tags are listed. We limit to the first and narrow down with the
1826 best = checktag(w[0]);
1827 db = trackdb_tagsdb;
1830 /* We can limit to some word. */
1831 db = trackdb_searchdb;
1834 /* Only stopwords */
1840 tid = trackdb_begin_transaction();
1841 /* find all the tracks that have that word */
1846 cursor = trackdb_opencursor(db, tid);
1847 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1848 vector_append(&v, xstrndup(d.data, d.size));
1855 case DB_LOCK_DEADLOCK:
1856 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1859 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1861 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1863 /* do a naive search over that (hopefuly fairly small) list of tracks */
1865 for(n = 0; n < v.nvec; ++n) {
1866 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1869 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1872 twords = track_to_words(v.vec[n], p);
1873 tags = parsetags(kvp_get(p, "tags"));
1874 for(i = 0; i < nwordlist; ++i) {
1875 if((tag = checktag(w[i]))) {
1876 /* Track must have this tag */
1877 for(j = 0; tags[j]; ++j)
1878 if(!strcmp(tag, tags[j])) break; /* tag found */
1879 if(!tags[j]) break; /* tag not found */
1881 /* Track must contain this word */
1882 for(j = 0; twords[j]; ++j)
1883 if(!strcmp(w[i], twords[j])) break; /* word found */
1884 if(!twords[j]) break; /* word not found */
1887 if(i >= nwordlist) /* all words found */
1888 vector_append(&u, v.vec[n]);
1892 trackdb_closecursor(cursor);
1894 trackdb_abort_transaction(tid);
1895 info("retrying search");
1897 trackdb_commit_transaction(tid);
1898 vector_terminate(&u);
1904 /* trackdb_scan **************************************************************/
1906 int trackdb_scan(const char *root,
1907 int (*callback)(const char *track,
1915 const size_t root_len = root ? strlen(root) : 0;
1920 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1922 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1925 memset(&k, 0, sizeof k);
1926 err = cursor->c_get(cursor, &k, prepare_data(&d),
1931 || (k.size > root_len
1932 && !strncmp(k.data, root, root_len)
1933 && ((char *)k.data)[root_len] == '/')) {
1934 data = kvp_urldecode(d.data, d.size);
1935 if(kvp_get(data, "_path")) {
1936 track = xstrndup(k.data, k.size);
1937 /* Advance to the next track before the callback so that the callback
1938 * may safely delete the track */
1939 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1940 if((cberr = callback(track, data, u, tid))) {
1945 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1949 trackdb_closecursor(cursor);
1956 case DB_LOCK_DEADLOCK:
1957 error(0, "c->c_get: %s", db_strerror(err));
1960 fatal(0, "c->c_get: %s", db_strerror(err));
1964 /* trackdb_rescan ************************************************************/
1966 /* called when the rescanner terminates */
1967 static int reap_rescan(ev_source attribute((unused)) *ev,
1970 const struct rusage attribute((unused)) *rusage,
1971 void attribute((unused)) *u) {
1972 if(pid == rescan_pid) rescan_pid = -1;
1974 error(0, "disorderd-rescan: %s", wstat(status));
1976 D(("disorderd-rescan terminate: %s", wstat(status)));
1977 /* Our cache of file lookups is out of date now */
1978 cache_clean(&cache_files_type);
1979 eventlog("rescanned", (char *)0);
1983 void trackdb_rescan(ev_source *ev) {
1984 if(rescan_pid != -1) {
1985 error(0, "rescan already underway");
1988 rescan_pid = subprogram(ev, RESCAN, -1);
1989 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1990 D(("started rescanner"));
1994 int trackdb_rescan_cancel(void) {
1995 if(rescan_pid == -1) return 0;
1996 if(kill(rescan_pid, SIGTERM) < 0)
1997 fatal(errno, "error killing rescanner");
2002 /* global prefs **************************************************************/
2004 void trackdb_set_global(const char *name,
2012 tid = trackdb_begin_transaction();
2013 if(!(err = trackdb_set_global_tid(name, value, tid)))
2015 trackdb_abort_transaction(tid);
2017 trackdb_commit_transaction(tid);
2018 /* log important state changes */
2019 if(!strcmp(name, "playing")) {
2020 state = !value || !strcmp(value, "yes");
2021 info("playing %s by %s",
2022 state ? "enabled" : "disabled",
2024 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
2026 if(!strcmp(name, "random-play")) {
2027 state = !value || !strcmp(value, "yes");
2028 info("random play %s by %s",
2029 state ? "enabled" : "disabled",
2031 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
2033 if(!strcmp(name, "required-tags"))
2037 int trackdb_set_global_tid(const char *name,
2043 memset(&k, 0, sizeof k);
2044 memset(&d, 0, sizeof d);
2045 k.data = (void *)name;
2046 k.size = strlen(name);
2048 d.data = (void *)value;
2049 d.size = strlen(value);
2052 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
2054 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
2055 if(err == DB_LOCK_DEADLOCK) return err;
2057 fatal(0, "error updating database: %s", db_strerror(err));
2061 const char *trackdb_get_global(const char *name) {
2067 tid = trackdb_begin_transaction();
2068 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2070 trackdb_abort_transaction(tid);
2072 trackdb_commit_transaction(tid);
2076 int trackdb_get_global_tid(const char *name,
2082 memset(&k, 0, sizeof k);
2083 k.data = (void *)name;
2084 k.size = strlen(name);
2085 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2086 prepare_data(&d), 0)) {
2088 *rp = xstrndup(d.data, d.size);
2093 case DB_LOCK_DEADLOCK:
2096 fatal(0, "error reading database: %s", db_strerror(err));
2100 /** @brief Retrieve the most recently added tracks
2101 * @param ntracksp Where to put count, or 0
2102 * @param maxtracks Maximum number of tracks to retrieve
2103 * @return null-terminated array of track names
2105 * The most recently added track is first in the array.
2107 char **trackdb_new(int *ntracksp,
2113 tid = trackdb_begin_transaction();
2114 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2117 trackdb_abort_transaction(tid);
2119 trackdb_commit_transaction(tid);
2123 /** @brief Retrieve the most recently added tracks
2124 * @param ntracksp Where to put count, or 0
2125 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2126 * @param tid Transaction ID
2127 * @return null-terminated array of track names, or NULL on deadlock
2129 * The most recently added track is first in the array.
2131 static char **trackdb_new_tid(int *ntracksp,
2137 struct vector tracks[1];
2139 vector_init(tracks);
2140 c = trackdb_opencursor(trackdb_noticeddb, tid);
2141 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2142 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2143 vector_append(tracks, xstrndup(d.data, d.size));
2145 case 0: /* hit maxtracks */
2146 case DB_NOTFOUND: /* ran out of tracks */
2148 case DB_LOCK_DEADLOCK:
2149 trackdb_closecursor(c);
2152 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2154 if((err = trackdb_closecursor(c)))
2155 return 0; /* deadlock */
2156 vector_terminate(tracks);
2158 *ntracksp = tracks->nvec;
2162 /** @brief Expire noticed.db
2163 * @param earliest Earliest timestamp to keep
2165 void trackdb_expire_noticed(time_t earliest) {
2169 tid = trackdb_begin_transaction();
2170 if(!trackdb_expire_noticed_tid(earliest, tid))
2172 trackdb_abort_transaction(tid);
2174 trackdb_commit_transaction(tid);
2177 /** @brief Expire noticed.db
2178 * @param earliest Earliest timestamp to keep
2179 * @param tid Transaction ID
2180 * @return 0 or DB_LOCK_DEADLOCK
2182 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2190 c = trackdb_opencursor(trackdb_noticeddb, tid);
2191 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2193 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2194 if(when >= earliest)
2196 if((err = c->c_del(c, 0))) {
2197 if(err != DB_LOCK_DEADLOCK)
2198 fatal(0, "error deleting expired noticed.db entry: %s",
2204 if(err == DB_NOTFOUND)
2206 if(err && err != DB_LOCK_DEADLOCK)
2207 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2209 if((err = trackdb_closecursor(c))) {
2210 if(err != DB_LOCK_DEADLOCK)
2211 fatal(0, "error closing cursor: %s", db_strerror(err));
2215 info("expired %d tracks from noticed.db", count);
2219 /* tidying up ****************************************************************/
2221 void trackdb_gc(void) {
2225 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2226 config->checkpoint_kbyte,
2227 config->checkpoint_min,
2229 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2230 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2231 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2232 /* This makes catastrophic recovery impossible. However, the user can still
2233 * preserve the important data by using disorder-dump to snapshot their
2234 * prefs, and later to restore it. This is likely to have much small
2235 * long-term storage requirements than record the db logfiles. */
2243 indent-tabs-mode:nil