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"
49 #include "trackname.h"
50 #include "trackdb-int.h"
58 #define RESCAN "disorder-rescan"
59 #define DEADLOCK "disorder-deadlock"
61 static const char *getpart(const char *track,
66 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
67 static char **trackdb_new_tid(int *ntracksp,
70 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
72 const struct cache_type cache_files_type = { 86400 };
73 unsigned long cache_files_hits, cache_files_misses;
75 /* setup and teardown ********************************************************/
77 static const char *home; /* home had better not change */
78 DB_ENV *trackdb_env; /* db environment */
80 /** @brief The tracks database
81 * - Keys are UTF-8(NFC(unicode(path name)))
82 * - Values are encoded key-value pairs
83 * - Data is reconstructable data about tracks that currently exist
87 /** @brief The preferences database
89 * - Keys are UTF-8(NFC(unicode(path name)))
90 * - Values are encoded key-value pairs
91 * - Data is user data about tracks (that might not exist any more)
92 * and cannot be reconstructed
96 /** @brief The search database
98 * - Keys are UTF-8(NFKC(casefold(search term)))
99 * - Values are UTF-8(NFC(unicode(path name)))
100 * - There can be more than one value per key
101 * - Presence of key,value means that path matches the search terms
102 * - Only tracks fond in @ref tracks_tracksdb are represented here
103 * - This database can be reconstructed, it contains no user data
105 DB *trackdb_searchdb;
107 /** @brief The tags database
109 * - Keys are UTF-8(NFKC(casefold(tag)))
110 * - Values are UTF-8(NFC(unicode(path name)))
111 * - There can be more than one value per key
112 * - Presence of key,value means that path matches the tag
113 * - This is always in sync with the tags preference
114 * - This database can be reconstructed, it contains no user data
116 DB *trackdb_tagsdb; /* the tags database */
118 /** @brief The global preferences database
119 * - Keys are UTF-8(NFC(preference))
120 * - Values are global preference values
121 * - Data is user data and cannot be reconstructed
123 DB *trackdb_globaldb; /* global preferences */
125 /** @brief The noticed database
126 * - Keys are 64-bit big-endian timestamps
127 * - Values are UTF-8(NFC(unicode(path name)))
128 * - There can be more than one value per key
129 * - Presence of key,value means that path was added at the given time
130 * - Data cannot be reconstructed (but isn't THAT important)
132 DB *trackdb_noticeddb; /* when track noticed */
133 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
134 static pid_t rescan_pid = -1; /* rescanner PID */
135 static int initialized, opened; /* state */
137 /* tracks matched by required_tags */
138 static char **reqtracks;
139 static size_t nreqtracks;
141 /* comparison function for keys */
142 static int compare(DB attribute((unused)) *db_,
143 const DBT *a, const DBT *b) {
144 return compare_path_raw(a->data, a->size, b->data, b->size);
147 /* open environment */
148 void trackdb_init(int recover) {
150 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
153 assert(initialized == 0);
156 if(strcmp(home, config->home))
157 fatal(0, "cannot change db home without server restart");
161 /* create environment */
162 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
164 if((err = trackdb_env->set_alloc(trackdb_env,
165 xmalloc_noptr, xrealloc_noptr, xfree)))
166 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
167 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
168 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
169 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
170 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
171 if((err = trackdb_env->open(trackdb_env, config->home,
177 |recover_type[recover],
179 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
180 trackdb_env->set_errpfx(trackdb_env, "DB");
181 trackdb_env->set_errfile(trackdb_env, stderr);
182 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
183 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
184 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
185 D(("initialized database environment"));
188 /* called when deadlock manager terminates */
189 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
190 pid_t attribute((unused)) pid,
192 const struct rusage attribute((unused)) *rusage,
193 void attribute((unused)) *u) {
194 db_deadlock_pid = -1;
196 fatal(0, "deadlock manager unexpectedly terminated: %s",
199 D(("deadlock manager terminated: %s", wstat(status)));
203 static pid_t subprogram(ev_source *ev, const char *prog,
207 /* If we're in the background then trap subprocess stdout/stderr */
208 if(!(pid = xfork())) {
210 ev_signal_atfork(ev);
211 signal(SIGPIPE, SIG_DFL);
216 /* If we were negatively niced, undo it. We don't bother checking for
217 * error, it's not that important. */
218 setpriority(PRIO_PROCESS, 0, 0);
219 execlp(prog, prog, "--config", configfile,
220 debugging ? "--debug" : "--no-debug",
221 log_default == &log_syslog ? "--syslog" : "--no-syslog",
223 fatal(errno, "error invoking %s", prog);
228 /* start deadlock manager */
229 void trackdb_master(ev_source *ev) {
230 assert(db_deadlock_pid == -1);
231 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
232 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
233 D(("started deadlock manager"));
236 /* close environment */
237 void trackdb_deinit(void) {
241 assert(initialized == 1);
244 /* close the environment */
245 if((err = trackdb_env->close(trackdb_env, 0)))
246 fatal(0, "trackdb_env->close: %s", db_strerror(err));
248 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
249 fatal(errno, "error killing rescanner");
251 /* terminate the deadlock manager */
252 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
253 fatal(errno, "error killing deadlock manager");
254 db_deadlock_pid = -1;
256 D(("deinitialized database environment"));
259 /* open a specific database */
260 static DB *open_db(const char *path,
268 D(("open %s", path));
269 path = config_get_file(path);
270 if((err = db_create(&db, trackdb_env, 0)))
271 fatal(0, "db_create %s: %s", path, db_strerror(err));
273 if((err = db->set_flags(db, dbflags)))
274 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
275 if(dbtype == DB_BTREE)
276 if((err = db->set_bt_compare(db, compare)))
277 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
278 if((err = db->open(db, 0, path, 0, dbtype,
279 openflags | DB_AUTO_COMMIT, mode))) {
280 if((openflags & DB_CREATE) || errno != ENOENT)
281 fatal(0, "db->open %s: %s", path, db_strerror(err));
288 /* open track databases */
289 void trackdb_open(void) {
295 /* check the database version first */
296 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
297 if(trackdb_globaldb) {
298 /* This is an existing database */
302 s = trackdb_get_global("_dbversion");
303 oldversion = s ? atol(s) : 1;
304 if(oldversion != config->dbversion) {
305 /* This database needs upgrading. This isn't implemented yet so we just
307 fatal(0, "database needs upgrading from %ld to %ld",
308 oldversion, config->dbversion);
311 /* Close the database again, we'll open it property below */
312 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
313 fatal(0, "error closing global.db: %s", db_strerror(err));
314 trackdb_globaldb = 0;
316 /* This is a brand new database */
319 /* open the databases */
320 trackdb_tracksdb = open_db("tracks.db",
321 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
322 trackdb_searchdb = open_db("search.db",
323 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
324 trackdb_tagsdb = open_db("tags.db",
325 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
326 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
327 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
328 trackdb_noticeddb = open_db("noticed.db",
329 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
330 /* Stash the database version */
334 snprintf(buf, sizeof buf, "%ld", config->dbversion);
335 trackdb_set_global("_dbversion", buf, 0);
337 D(("opened databases"));
340 /* close track databases */
341 void trackdb_close(void) {
347 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
348 fatal(0, "error closing tracks.db: %s", db_strerror(err));
349 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
350 fatal(0, "error closing search.db: %s", db_strerror(err));
351 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
352 fatal(0, "error closing tags.db: %s", db_strerror(err));
353 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
354 fatal(0, "error closing prefs.db: %s", db_strerror(err));
355 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
356 fatal(0, "error closing global.db: %s", db_strerror(err));
357 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
358 fatal(0, "error closing noticed.db: %s", db_strerror(err));
359 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
360 trackdb_tagsdb = trackdb_globaldb = 0;
361 D(("closed databases"));
364 /* generic db routines *******************************************************/
366 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
367 * DB_LOCK_DEADLOCK. */
368 int trackdb_getdata(DB *db,
375 switch(err = db->get(db, tid, make_key(&key, track),
376 prepare_data(&data), 0)) {
378 *kp = kvp_urldecode(data.data, data.size);
383 case DB_LOCK_DEADLOCK:
384 error(0, "error querying database: %s", db_strerror(err));
387 fatal(0, "error querying database: %s", db_strerror(err));
391 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
392 * DB_LOCK_DEADLOCK. */
393 int trackdb_putdata(DB *db,
401 switch(err = db->put(db, tid, make_key(&key, track),
402 encode_data(&data, k), flags)) {
406 case DB_LOCK_DEADLOCK:
407 error(0, "error updating database: %s", db_strerror(err));
410 fatal(0, "error updating database: %s", db_strerror(err));
414 /* delete a database entry */
415 int trackdb_delkey(DB *db,
421 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
425 case DB_LOCK_DEADLOCK:
426 error(0, "error updating database: %s", db_strerror(err));
429 fatal(0, "error updating database: %s", db_strerror(err));
433 /* open a database cursor */
434 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
438 switch(err = db->cursor(db, tid, &c, 0)) {
440 default: fatal(0, "error creating cursor: %s", db_strerror(err));
445 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
446 int trackdb_closecursor(DBC *c) {
450 switch(err = c->c_close(c)) {
453 case DB_LOCK_DEADLOCK:
454 error(0, "error closing cursor: %s", db_strerror(err));
457 fatal(0, "error closing cursor: %s", db_strerror(err));
461 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
462 int trackdb_delkeydata(DB *db,
470 c = trackdb_opencursor(db, tid);
471 switch(err = c->c_get(c, make_key(&key, word),
472 make_key(&data, track), DB_GET_BOTH)) {
474 switch(err = c->c_del(c, 0)) {
480 case DB_LOCK_DEADLOCK:
481 error(0, "error updating database: %s", db_strerror(err));
484 fatal(0, "c->c_del: %s", db_strerror(err));
489 case DB_LOCK_DEADLOCK:
490 error(0, "error updating database: %s", db_strerror(err));
493 fatal(0, "c->c_get: %s", db_strerror(err));
495 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
499 /* start a transaction */
500 DB_TXN *trackdb_begin_transaction(void) {
504 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
505 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
509 /* abort transaction */
510 void trackdb_abort_transaction(DB_TXN *tid) {
514 if((err = tid->abort(tid)))
515 fatal(0, "tid->abort: %s", db_strerror(err));
518 /* commit transaction */
519 void trackdb_commit_transaction(DB_TXN *tid) {
522 if((err = tid->commit(tid, 0)))
523 fatal(0, "tid->commit: %s", db_strerror(err));
526 /* search/tags shared code ***************************************************/
528 /* comparison function used by dedupe() */
529 static int wordcmp(const void *a, const void *b) {
530 return strcmp(*(const char **)a, *(const char **)b);
533 /* sort and de-dupe VEC */
534 static char **dedupe(char **vec, int nvec) {
537 qsort(vec, nvec, sizeof (char *), wordcmp);
541 for(n = 1; n < nvec; ++n)
542 if(strcmp(vec[n], vec[m - 1]))
549 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
550 static int register_word(DB *db, const char *what,
551 const char *track, const char *word,
556 switch(err = db->put(db, tid, make_key(&key, word),
557 make_key(&data, track), DB_NODUPDATA)) {
561 case DB_LOCK_DEADLOCK:
562 error(0, "error updating %s.db: %s", what, db_strerror(err));
565 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
569 /* search primitives *********************************************************/
571 /* return true iff NAME is a trackname_display_ pref */
572 static int is_display_pref(const char *name) {
573 static const char prefix[] = "trackname_display_";
574 return !strncmp(name, prefix, (sizeof prefix) - 1);
577 /** @brief Word_Break property tailor that treats underscores as spaces */
578 static int tailor_underscore_Word_Break_Other(uint32_t c) {
582 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
583 return unicode_Word_Break_Other;
587 /** @brief Normalize and split a string using a given tailoring */
588 static void word_split(struct vector *v,
590 unicode_property_tailor *pt) {
592 uint32_t *t32, **w32;
594 /* Convert to UTF-32 */
595 if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32)))
597 /* Erase case distinctions */
598 if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32)))
600 /* Split into words, treating _ as a space */
601 w32 = utf32_word_split(t32, nt32, &nw, pt);
602 /* Convert words back to UTF-8 and append to result */
603 for(i = 0; i < nw; ++i)
604 vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
607 /* compute the words of a track name */
608 static char **track_to_words(const char *track,
609 const struct kvp *p) {
611 const char *rootless = track_rootless(track);
614 rootless = track; /* bodge */
616 rootless = strip_extension(rootless);
617 word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other);
618 for(; p; p = p->next)
619 if(is_display_pref(p->name))
620 word_split(&v, p->value, 0);
621 vector_terminate(&v);
622 return dedupe(v.vec, v.nvec);
625 /* return nonzero iff WORD is a stopword */
626 static int stopword(const char *word) {
629 for(n = 0; n < config->stopword.n
630 && strcmp(word, config->stopword.s[n]); ++n)
632 return n < config->stopword.n;
635 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
636 static int register_search_word(const char *track, const char *word,
638 if(stopword(word)) return 0;
639 return register_word(trackdb_searchdb, "search", track, word, tid);
642 /* Tags **********************************************************************/
644 /* Return nonzero if C is a valid tag character */
645 static int tagchar(int c) {
654 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
655 static char **parsetags(const char *s) {
661 /* skip initial separators */
662 while(*s && (!tagchar(*s) || *s == ' '))
665 /* find the extent of the tag */
667 while(*s && tagchar(*s))
669 /* strip trailing spaces */
670 while(s > t && s[-1] == ' ')
672 vector_append(&v, xstrndup(t, s - t));
673 /* skip intermediate and trailing separators */
674 while(*s && (!tagchar(*s) || *s == ' '))
678 vector_terminate(&v);
679 return dedupe(v.vec, v.nvec);
682 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
683 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
684 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
687 /* aliases *******************************************************************/
689 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
690 * there is no alias sets *aliasp to 0. */
691 static int compute_alias(char **aliasp,
696 const char *s = config->alias, *t, *expansion, *part;
697 int c, used_db = 0, slash_prefix, err;
699 const char *const root = find_track_root(track);
702 /* Bodge for tracks with no root */
707 dynstr_append_string(&d, root);
708 while((c = (unsigned char)*s++)) {
710 dynstr_append(&d, c);
713 if((slash_prefix = (*s == '/')))
716 assert(t != 0); /* validated at startup */
717 part = xstrndup(s, t - s);
718 expansion = getpart(track, "display", part, p, &used_db);
720 if(slash_prefix) dynstr_append(&d, '/');
721 dynstr_append_string(&d, expansion);
723 s = t + 1; /* skip {part} */
725 /* only admit to the alias if we used the db... */
730 dynstr_terminate(&d);
731 /* ...and the answer differs from the original... */
732 if(!strcmp(track, d.vec)) {
736 /* ...and there isn't already a different track with that name (including as
738 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
740 if((s = kvp_get(at, "_alias_for"))
741 && !strcmp(s, track)) {
753 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
754 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
755 * Always sets the return values, even if only to null pointers. */
756 static int gettrackdata(const char *track,
759 const char **actualp,
761 #define GTD_NOALIAS 0x0001
764 const char *actual = track;
765 struct kvp *t = 0, *p = 0;
767 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
768 if((actual = kvp_get(t, "_alias_for"))) {
769 if(flags & GTD_NOALIAS) {
770 error(0, "alias passed to gettrackdata where real path required");
773 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
778 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
783 if(actualp) *actualp = actual;
789 /* trackdb_notice() **********************************************************/
791 /** @brief notice a possibly new track
792 * @return @c DB_NOTFOUND if new, 0 if already known
794 int trackdb_notice(const char *track,
800 tid = trackdb_begin_transaction();
801 err = trackdb_notice_tid(track, path, tid);
802 if((err == DB_LOCK_DEADLOCK)) goto fail;
805 trackdb_abort_transaction(tid);
807 trackdb_commit_transaction(tid);
811 /** @brief notice a possibly new track
812 * @param track NFC UTF-8 track name
813 * @param path Raw path name
814 * @param tid Transaction ID
815 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
817 int trackdb_notice_tid(const char *track,
821 struct kvp *t, *a, *p;
825 /* notice whether the tracks.db entry changes */
827 /* get any existing tracks entry */
828 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
830 ret = err; /* 0 or DB_NOTFOUND */
831 /* this is a real track */
832 t_changed += kvp_set(&t, "_alias_for", 0);
833 t_changed += kvp_set(&t, "_path", path);
834 /* if we have an alias record it in the database */
835 if((err = compute_alias(&alias, track, p, tid))) return err;
837 /* won't overwrite someone else's alias as compute_alias() checks */
838 D(("%s: alias %s", track, alias));
840 kvp_set(&a, "_alias_for", track);
841 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
843 /* update search.db */
844 w = track_to_words(track, p);
845 for(n = 0; w[n]; ++n)
846 if((err = register_search_word(track, w[n], tid)))
849 w = parsetags(kvp_get(p, "tags"));
850 for(n = 0; w[n]; ++n)
851 if((err = register_tag(track, w[n], tid)))
854 /* only store the tracks.db entry if it has changed */
855 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
857 if(ret == DB_NOTFOUND) {
858 uint32_t timestamp[2];
863 timestamp[0] = htonl((uint64_t)now >> 32);
864 timestamp[1] = htonl((uint32_t)now);
865 memset(&key, 0, sizeof key);
866 key.data = timestamp;
867 key.size = sizeof timestamp;
868 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
869 make_key(&data, track), 0)) {
871 case DB_LOCK_DEADLOCK: return err;
872 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
878 /* trackdb_obsolete() ********************************************************/
880 /* obsolete a track */
881 int trackdb_obsolete(const char *track, DB_TXN *tid) {
886 if((err = gettrackdata(track, 0, &p, 0,
887 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
889 else if(err == DB_NOTFOUND) return 0;
890 /* compute the alias, if any, and delete it */
891 if(compute_alias(&alias, track, p, tid)) return err;
893 /* if the alias points to some other track then compute_alias won't
895 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
898 /* update search.db */
899 w = track_to_words(track, p);
900 for(n = 0; w[n]; ++n)
901 if(trackdb_delkeydata(trackdb_searchdb,
902 w[n], track, tid) == DB_LOCK_DEADLOCK)
905 w = parsetags(kvp_get(p, "tags"));
906 for(n = 0; w[n]; ++n)
907 if(trackdb_delkeydata(trackdb_tagsdb,
908 w[n], track, tid) == DB_LOCK_DEADLOCK)
911 /* update tracks.db */
912 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
914 /* We don't delete the prefs, so they survive temporary outages of the
915 * (possibly virtual) track filesystem */
919 /* trackdb_stats() ***********************************************************/
921 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
922 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
924 static const struct statinfo {
927 } statinfo_hash[] = {
943 }, statinfo_btree[] = {
964 /* look up stats for DB */
965 static int get_stats(struct vector *v,
967 const struct statinfo *si,
976 switch(err = database->stat(database, tid, &sp, 0)) {
979 case DB_LOCK_DEADLOCK:
980 error(0, "error querying database: %s", db_strerror(err));
983 fatal(0, "error querying database: %s", db_strerror(err));
985 for(n = 0; n < nsi; ++n) {
986 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
987 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
988 vector_append(v, str);
994 struct search_entry {
999 /* find the top COUNT words in the search database */
1000 static int search_league(struct vector *v, int count, DB_TXN *tid) {
1001 struct search_entry *se;
1004 int err, n = 0, nse = 0, i;
1009 cursor = trackdb_opencursor(trackdb_searchdb, tid);
1010 se = xmalloc(count * sizeof *se);
1011 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
1013 if(word && wl == k.size && !strncmp(word, k.data, wl))
1016 #define FINALIZE() do { \
1017 if(word && (nse < count || n > se[nse - 1].n)) { \
1022 while(i > 0 && n > se[i - 1].n) \
1024 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
1025 se[i].word = word; \
1030 word = xstrndup(k.data, wl = k.size);
1038 case DB_LOCK_DEADLOCK:
1039 error(0, "error querying search database: %s", db_strerror(err));
1042 fatal(0, "error querying search database: %s", db_strerror(err));
1044 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1047 byte_xasprintf(&str, "Top %d search words:", nse);
1048 vector_append(v, str);
1049 for(i = 0; i < nse; ++i) {
1050 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1051 vector_append(v, str);
1056 #define SI(what) statinfo_##what, \
1057 sizeof statinfo_##what / sizeof (struct statinfo)
1059 /* return a list of database stats */
1060 char **trackdb_stats(int *nstatsp) {
1066 tid = trackdb_begin_transaction();
1068 vector_append(&v, (char *)"Tracks database stats:");
1069 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1070 vector_append(&v, (char *)"");
1071 vector_append(&v, (char *)"Search database stats:");
1072 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1073 vector_append(&v, (char *)"");
1074 vector_append(&v, (char *)"Prefs database stats:");
1075 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1076 vector_append(&v, (char *)"");
1077 if(search_league(&v, 10, tid)) goto fail;
1078 vector_terminate(&v);
1081 trackdb_abort_transaction(tid);
1083 trackdb_commit_transaction(tid);
1084 if(nstatsp) *nstatsp = v.nvec;
1088 struct stats_details {
1089 void (*done)(char *data, void *u);
1091 int exited; /* subprocess exited */
1092 int closed; /* pipe close */
1093 int wstat; /* wait status from subprocess */
1094 struct dynstr data[1]; /* data read from pipe */
1097 static void stats_complete(struct stats_details *d) {
1100 if(!(d->exited && d->closed))
1102 byte_xasprintf(&s, "\n"
1104 "track lookup cache hits: %lu\n"
1105 "track lookup cache misses: %lu\n",
1107 cache_files_misses);
1108 dynstr_append_string(d->data, s);
1109 dynstr_terminate(d->data);
1110 d->done(d->data->vec, d->u);
1113 static int stats_finished(ev_source attribute((unused)) *ev,
1114 pid_t attribute((unused)) pid,
1116 const struct rusage attribute((unused)) *rusage,
1118 struct stats_details *const d = u;
1122 error(0, "disorder-stats %s", wstat(status));
1127 static int stats_read(ev_source attribute((unused)) *ev,
1133 struct stats_details *const d = u;
1135 dynstr_append_bytes(d->data, ptr, bytes);
1136 ev_reader_consume(reader, bytes);
1143 static int stats_error(ev_source attribute((unused)) *ev,
1146 struct stats_details *const d = u;
1148 error(errno_value, "error reading from pipe to disorder-stats");
1154 void trackdb_stats_subprocess(ev_source *ev,
1155 void (*done)(char *data, void *u),
1159 struct stats_details *d = xmalloc(sizeof *d);
1161 dynstr_init(d->data);
1165 pid = subprogram(ev, "disorder-stats", p[1]);
1167 ev_child(ev, pid, 0, stats_finished, d);
1168 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1171 /* set a pref (remove if value=0) */
1172 int trackdb_set(const char *track,
1174 const char *value) {
1175 struct kvp *t, *p, *a;
1178 char *oldalias, *newalias, **oldtags = 0, **newtags;
1181 /* TODO: if value matches default then set value=0 */
1185 tid = trackdb_begin_transaction();
1186 if((err = gettrackdata(track, &t, &p, 0,
1187 0, tid)) == DB_LOCK_DEADLOCK)
1189 if(err == DB_NOTFOUND) break;
1190 if(name[0] == '_') {
1191 if(kvp_set(&t, name, value))
1192 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1195 /* get the old alias name */
1196 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1197 /* get the old tags */
1198 if(!strcmp(name, "tags"))
1199 oldtags = parsetags(kvp_get(p, "tags"));
1201 if(kvp_set(&p, name, value))
1202 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1204 /* compute the new alias name */
1205 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1206 /* check whether alias has changed */
1207 if(!(oldalias == newalias
1208 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1209 /* adjust alias records to fit change */
1211 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1214 kvp_set(&a, "_alias_for", track);
1215 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1218 /* check whether tags have changed */
1219 if(!strcmp(name, "tags")) {
1220 newtags = parsetags(value);
1221 while(*oldtags || *newtags) {
1222 if(*oldtags && *newtags) {
1223 cmp = strcmp(*oldtags, *newtags);
1225 /* keeping this tag */
1229 /* old tag fits into a gap in the new list, so delete old */
1232 /* new tag fits into a gap in the old list, so insert new */
1234 } else if(*oldtags) {
1235 /* we've run out of new tags, so remaining old ones are to be
1238 if(trackdb_delkeydata(trackdb_tagsdb,
1239 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1243 /* we've run out of old tags, so remainig new ones are to be
1246 if(register_tag(track, *newtags, tid)) goto fail;
1256 trackdb_abort_transaction(tid);
1258 trackdb_commit_transaction(tid);
1259 return err == 0 ? 0 : -1;
1263 const char *trackdb_get(const char *track,
1265 return kvp_get(trackdb_get_all(track), name);
1268 /* get all prefs as a 0-terminated array */
1269 struct kvp *trackdb_get_all(const char *track) {
1270 struct kvp *t, *p, **pp;
1274 tid = trackdb_begin_transaction();
1275 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1279 trackdb_abort_transaction(tid);
1281 trackdb_commit_transaction(tid);
1282 for(pp = &p; *pp; pp = &(*pp)->next)
1289 const char *trackdb_resolve(const char *track) {
1294 tid = trackdb_begin_transaction();
1295 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1299 trackdb_abort_transaction(tid);
1301 trackdb_commit_transaction(tid);
1305 int trackdb_isalias(const char *track) {
1306 const char *actual = trackdb_resolve(track);
1308 return strcmp(actual, track);
1311 /* test whether a track exists (perhaps an alias) */
1312 int trackdb_exists(const char *track) {
1317 tid = trackdb_begin_transaction();
1318 /* unusually, here we want the return value */
1319 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1323 trackdb_abort_transaction(tid);
1325 trackdb_commit_transaction(tid);
1329 /* return the list of tags */
1330 char **trackdb_alltags(void) {
1336 tid = trackdb_begin_transaction();
1337 err = trackdb_alltags_tid(tid, &taglist);
1339 trackdb_abort_transaction(tid);
1341 trackdb_commit_transaction(tid);
1345 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1352 c = trackdb_opencursor(trackdb_tagsdb, tid);
1353 memset(&k, 0, sizeof k);
1354 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1355 vector_append(&v, xstrndup(k.data, k.size));
1359 case DB_LOCK_DEADLOCK:
1362 fatal(0, "c->c_get: %s", db_strerror(err));
1364 if((err = trackdb_closecursor(c))) return err;
1365 vector_terminate(&v);
1370 /* return 1 iff sorted tag lists A and B have at least one member in common */
1371 static int tag_intersection(char **a, char **b) {
1374 /* Same sort of logic as trackdb_set() above */
1376 if(!(cmp = strcmp(*a, *b))) return 1;
1377 else if(cmp < 0) ++a;
1383 /* Check whether a track is suitable for random play. Returns 0 if it is,
1384 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1386 static int check_suitable(const char *track,
1388 char **required_tags,
1389 char **prohibited_tags) {
1393 const char *pick_at_random, *played_time;
1395 /* don't pick tracks that aren't in any surviving collection (for instance
1396 * you've edited the config but the rescan hasn't done its job yet) */
1397 if(!find_track_root(track)) {
1398 info("found track not in any collection: %s", track);
1401 /* don't pick aliases - only pick the canonical form */
1402 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1403 return DB_LOCK_DEADLOCK;
1404 if(kvp_get(t, "_alias_for"))
1406 /* check that random play is not suppressed for this track */
1407 if((pick_at_random = kvp_get(p, "pick_at_random"))
1408 && !strcmp(pick_at_random, "0"))
1410 /* don't pick a track that's been played in the last 8 hours */
1411 if((played_time = kvp_get(p, "played_time"))) {
1412 last = atoll(played_time);
1414 if(now < last + 8 * 3600) /* TODO configurable */
1417 track_tags = parsetags(kvp_get(p, "tags"));
1418 /* check that no prohibited tag is present for this track */
1419 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1421 /* check that at least one required tags is present for this track */
1422 if(*required_tags && !tag_intersection(track_tags, required_tags))
1427 /* attempt to pick a random non-alias track */
1428 const char *trackdb_random(int tries) {
1433 const char *track, *candidate;
1436 char **required_tags, **prohibited_tags, **tp;
1441 tid = trackdb_begin_transaction();
1442 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1444 required_tags = parsetags(tags);
1445 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1447 prohibited_tags = parsetags(tags);
1449 if(*required_tags) {
1450 /* Bung all the suitable tracks into a hash and convert to a list of keys
1451 * (to eliminate duplicates). We cache this list since it is possible
1452 * that it will be very large. */
1455 for(tp = required_tags; *tp; ++tp) {
1456 c = trackdb_opencursor(trackdb_tagsdb, tid);
1457 memset(&key, 0, sizeof key);
1459 key.size = strlen(*tp);
1461 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1463 hash_add(h, xstrndup(data.data, data.size), 0,
1464 HASH_INSERT_OR_REPLACE);
1466 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1472 case DB_LOCK_DEADLOCK:
1475 fatal(0, "error querying tags.db: %s", db_strerror(err));
1477 trackdb_closecursor(c);
1480 error(0, "required tag %s does not match any tracks", *tp);
1482 nreqtracks = hash_count(h);
1483 reqtracks = hash_keys(h);
1485 while(nreqtracks && !track && tries-- > 0) {
1486 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1487 candidate = reqtracks[r];
1488 switch(check_suitable(candidate, tid,
1489 required_tags, prohibited_tags)) {
1495 case DB_LOCK_DEADLOCK:
1500 /* No required tags. We pick random record numbers in the database
1502 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1505 case DB_LOCK_DEADLOCK:
1506 error(0, "error querying tracks.db: %s", db_strerror(err));
1509 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1512 error(0, "cannot pick tracks at random from an empty database");
1513 while(sp->bt_nkeys && !track && tries-- > 0) {
1514 /* record numbers count from 1 upwards */
1515 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1516 memset(&key, sizeof key, 0);
1517 key.flags = DB_DBT_MALLOC;
1518 key.size = sizeof r;
1520 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1524 case DB_LOCK_DEADLOCK:
1525 error(0, "error querying tracks.db: %s", db_strerror(err));
1528 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1530 candidate = xstrndup(key.data, key.size);
1531 switch(check_suitable(candidate, tid,
1532 required_tags, prohibited_tags)) {
1538 case DB_LOCK_DEADLOCK:
1545 trackdb_closecursor(c);
1547 trackdb_abort_transaction(tid);
1549 trackdb_commit_transaction(tid);
1551 error(0, "could not pick a random track");
1555 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1556 * from the prefs. */
1557 static const char *getpart(const char *track,
1558 const char *context,
1560 const struct kvp *p,
1565 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1566 if((result = kvp_get(p, pref)))
1569 result = trackname_part(track, context, part);
1570 assert(result != 0);
1574 /* get a track name part, like trackname_part(), but taking the database into
1576 const char *trackdb_getpart(const char *track,
1577 const char *context,
1585 /* construct the full pref */
1586 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1588 tid = trackdb_begin_transaction();
1589 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1593 trackdb_abort_transaction(tid);
1595 trackdb_commit_transaction(tid);
1596 return getpart(actual, context, part, p, &used_db);
1599 /* get the raw path name for @track@ (might be an alias) */
1600 const char *trackdb_rawpath(const char *track) {
1606 tid = trackdb_begin_transaction();
1607 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1611 trackdb_abort_transaction(tid);
1613 trackdb_commit_transaction(tid);
1614 if(!(path = kvp_get(t, "_path"))) path = track;
1618 /* trackdb_list **************************************************************/
1620 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1621 * readable at some point */
1623 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1624 * If RE is a null pointer then it matches everything. */
1625 static int track_matches(size_t dl, const char *track, size_t tl,
1633 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1634 case PCRE_ERROR_NOMATCH: return 0;
1637 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1644 static int do_list(struct vector *v, const char *dir,
1645 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1651 size_t l, last_dir_len = 0;
1652 char *last_dir = 0, *track, *alias;
1656 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1659 /* find the first key >= dir */
1660 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1661 /* keep going while we're dealing with <dir/anything> */
1664 && ((char *)k.data)[dl] == '/'
1665 && !memcmp(k.data, dir, dl)) {
1666 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1668 /* we have <dir/component/anything>, so <dir/component> is a directory */
1669 l = ptr - (char *)k.data;
1670 if(what & trackdb_directories)
1672 && l == last_dir_len
1673 && !memcmp(last_dir, k.data, l))) {
1674 last_dir = xstrndup(k.data, last_dir_len = l);
1675 if(track_matches(dl, k.data, l, re))
1676 vector_append(v, last_dir);
1679 /* found a plain file */
1680 if((what & trackdb_files)) {
1681 track = xstrndup(k.data, k.size);
1682 if((err = trackdb_getdata(trackdb_prefsdb,
1683 track, &p, tid)) == DB_LOCK_DEADLOCK)
1685 /* if this file has an alias in the same directory then we skip it */
1686 if((err = compute_alias(&alias, track, p, tid)))
1688 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1689 if(track_matches(dl, k.data, k.size, re))
1690 vector_append(v, track);
1693 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1701 case DB_LOCK_DEADLOCK:
1702 error(0, "error querying database: %s", db_strerror(err));
1705 fatal(0, "error querying database: %s", db_strerror(err));
1708 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1712 /* return the directories or files below @dir@ */
1713 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1721 tid = trackdb_begin_transaction();
1724 if(do_list(&v, dir, what, re, tid))
1727 for(n = 0; n < config->collection.n; ++n)
1728 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1733 trackdb_abort_transaction(tid);
1735 trackdb_commit_transaction(tid);
1736 vector_terminate(&v);
1742 /* If S is tag:something, return something. Else return 0. */
1743 static const char *checktag(const char *s) {
1744 if(!strncmp(s, "tag:", 4))
1750 /* return a list of tracks containing all of the words given. If you
1751 * ask for only stopwords you get no tracks. */
1752 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1753 const char **w, *best = 0, *tag;
1754 char **twords, **tags;
1755 int i, j, n, err, what;
1765 *ntracks = 0; /* for early returns */
1766 /* casefold all the words */
1767 w = xmalloc(nwordlist * sizeof (char *));
1768 for(n = 0; n < nwordlist; ++n) {
1769 w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0);
1770 if(checktag(w[n])) ++ntags; /* count up tags */
1772 /* find the longest non-stopword */
1773 for(n = 0; n < nwordlist; ++n)
1774 if(!stopword(w[n]) && !checktag(w[n]))
1775 if(!best || strlen(w[n]) > strlen(best))
1777 /* TODO: we should at least in principal be able to identify the word or tag
1778 * with the least matches in log time, and choose that as our primary search
1780 if(ntags && !best) {
1781 /* Only tags are listed. We limit to the first and narrow down with the
1783 best = checktag(w[0]);
1784 db = trackdb_tagsdb;
1787 /* We can limit to some word. */
1788 db = trackdb_searchdb;
1791 /* Only stopwords */
1797 tid = trackdb_begin_transaction();
1798 /* find all the tracks that have that word */
1803 cursor = trackdb_opencursor(db, tid);
1804 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1805 vector_append(&v, xstrndup(d.data, d.size));
1812 case DB_LOCK_DEADLOCK:
1813 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1816 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1818 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1820 /* do a naive search over that (hopefuly fairly small) list of tracks */
1822 for(n = 0; n < v.nvec; ++n) {
1823 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1826 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1829 twords = track_to_words(v.vec[n], p);
1830 tags = parsetags(kvp_get(p, "tags"));
1831 for(i = 0; i < nwordlist; ++i) {
1832 if((tag = checktag(w[i]))) {
1833 /* Track must have this tag */
1834 for(j = 0; tags[j]; ++j)
1835 if(!strcmp(tag, tags[j])) break; /* tag found */
1836 if(!tags[j]) break; /* tag not found */
1838 /* Track must contain this word */
1839 for(j = 0; twords[j]; ++j)
1840 if(!strcmp(w[i], twords[j])) break; /* word found */
1841 if(!twords[j]) break; /* word not found */
1844 if(i >= nwordlist) /* all words found */
1845 vector_append(&u, v.vec[n]);
1849 trackdb_closecursor(cursor);
1851 trackdb_abort_transaction(tid);
1852 info("retrying search");
1854 trackdb_commit_transaction(tid);
1855 vector_terminate(&u);
1861 /* trackdb_scan **************************************************************/
1863 int trackdb_scan(const char *root,
1864 int (*callback)(const char *track,
1872 const size_t root_len = root ? strlen(root) : 0;
1877 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1879 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1882 memset(&k, 0, sizeof k);
1883 err = cursor->c_get(cursor, &k, prepare_data(&d),
1888 || (k.size > root_len
1889 && !strncmp(k.data, root, root_len)
1890 && ((char *)k.data)[root_len] == '/')) {
1891 data = kvp_urldecode(d.data, d.size);
1892 if(kvp_get(data, "_path")) {
1893 track = xstrndup(k.data, k.size);
1894 /* Advance to the next track before the callback so that the callback
1895 * may safely delete the track */
1896 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1897 if((cberr = callback(track, data, u, tid))) {
1902 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1906 trackdb_closecursor(cursor);
1913 case DB_LOCK_DEADLOCK:
1914 error(0, "c->c_get: %s", db_strerror(err));
1917 fatal(0, "c->c_get: %s", db_strerror(err));
1921 /* trackdb_rescan ************************************************************/
1923 /* called when the rescanner terminates */
1924 static int reap_rescan(ev_source attribute((unused)) *ev,
1927 const struct rusage attribute((unused)) *rusage,
1928 void attribute((unused)) *u) {
1929 if(pid == rescan_pid) rescan_pid = -1;
1931 error(0, "disorderd-rescan: %s", wstat(status));
1933 D(("disorderd-rescan terminate: %s", wstat(status)));
1934 /* Our cache of file lookups is out of date now */
1935 cache_clean(&cache_files_type);
1936 eventlog("rescanned", (char *)0);
1940 void trackdb_rescan(ev_source *ev) {
1941 if(rescan_pid != -1) {
1942 error(0, "rescan already underway");
1945 rescan_pid = subprogram(ev, RESCAN, -1);
1946 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1947 D(("started rescanner"));
1951 int trackdb_rescan_cancel(void) {
1952 if(rescan_pid == -1) return 0;
1953 if(kill(rescan_pid, SIGTERM) < 0)
1954 fatal(errno, "error killing rescanner");
1959 /* global prefs **************************************************************/
1961 void trackdb_set_global(const char *name,
1969 tid = trackdb_begin_transaction();
1970 if(!(err = trackdb_set_global_tid(name, value, tid)))
1972 trackdb_abort_transaction(tid);
1974 trackdb_commit_transaction(tid);
1975 /* log important state changes */
1976 if(!strcmp(name, "playing")) {
1977 state = !value || !strcmp(value, "yes");
1978 info("playing %s by %s",
1979 state ? "enabled" : "disabled",
1981 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
1983 if(!strcmp(name, "random-play")) {
1984 state = !value || !strcmp(value, "yes");
1985 info("random play %s by %s",
1986 state ? "enabled" : "disabled",
1988 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
1990 if(!strcmp(name, "required-tags"))
1994 int trackdb_set_global_tid(const char *name,
2000 memset(&k, 0, sizeof k);
2001 memset(&d, 0, sizeof d);
2002 k.data = (void *)name;
2003 k.size = strlen(name);
2005 d.data = (void *)value;
2006 d.size = strlen(value);
2009 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
2011 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
2012 if(err == DB_LOCK_DEADLOCK) return err;
2014 fatal(0, "error updating database: %s", db_strerror(err));
2018 const char *trackdb_get_global(const char *name) {
2024 tid = trackdb_begin_transaction();
2025 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2027 trackdb_abort_transaction(tid);
2029 trackdb_commit_transaction(tid);
2033 int trackdb_get_global_tid(const char *name,
2039 memset(&k, 0, sizeof k);
2040 k.data = (void *)name;
2041 k.size = strlen(name);
2042 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2043 prepare_data(&d), 0)) {
2045 *rp = xstrndup(d.data, d.size);
2050 case DB_LOCK_DEADLOCK:
2053 fatal(0, "error reading database: %s", db_strerror(err));
2057 /** @brief Retrieve the most recently added tracks
2058 * @param ntracksp Where to put count, or 0
2059 * @param maxtracks Maximum number of tracks to retrieve
2060 * @return null-terminated array of track names
2062 * The most recently added track is first in the array.
2064 char **trackdb_new(int *ntracksp,
2070 tid = trackdb_begin_transaction();
2071 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2074 trackdb_abort_transaction(tid);
2076 trackdb_commit_transaction(tid);
2080 /** @brief Retrieve the most recently added tracks
2081 * @param ntracksp Where to put count, or 0
2082 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2083 * @param tid Transaction ID
2084 * @return null-terminated array of track names, or NULL on deadlock
2086 * The most recently added track is first in the array.
2088 static char **trackdb_new_tid(int *ntracksp,
2094 struct vector tracks[1];
2096 vector_init(tracks);
2097 c = trackdb_opencursor(trackdb_noticeddb, tid);
2098 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2099 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2100 vector_append(tracks, xstrndup(d.data, d.size));
2102 case 0: /* hit maxtracks */
2103 case DB_NOTFOUND: /* ran out of tracks */
2105 case DB_LOCK_DEADLOCK:
2106 trackdb_closecursor(c);
2109 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2111 if((err = trackdb_closecursor(c)))
2112 return 0; /* deadlock */
2113 vector_terminate(tracks);
2115 *ntracksp = tracks->nvec;
2119 /** @brief Expire noticed.db
2120 * @param earliest Earliest timestamp to keep
2122 void trackdb_expire_noticed(time_t earliest) {
2126 tid = trackdb_begin_transaction();
2127 if(!trackdb_expire_noticed_tid(earliest, tid))
2129 trackdb_abort_transaction(tid);
2131 trackdb_commit_transaction(tid);
2134 /** @brief Expire noticed.db
2135 * @param earliest Earliest timestamp to keep
2136 * @param tid Transaction ID
2137 * @return 0 or DB_LOCK_DEADLOCK
2139 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2147 c = trackdb_opencursor(trackdb_noticeddb, tid);
2148 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2150 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2151 if(when >= earliest)
2153 if((err = c->c_del(c, 0))) {
2154 if(err != DB_LOCK_DEADLOCK)
2155 fatal(0, "error deleting expired noticed.db entry: %s",
2161 if(err == DB_NOTFOUND)
2163 if(err && err != DB_LOCK_DEADLOCK)
2164 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2166 if((err = trackdb_closecursor(c))) {
2167 if(err != DB_LOCK_DEADLOCK)
2168 fatal(0, "error closing cursor: %s", db_strerror(err));
2172 info("expired %d tracks from noticed.db", count);
2176 /* tidying up ****************************************************************/
2178 void trackdb_gc(void) {
2182 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2183 config->checkpoint_kbyte,
2184 config->checkpoint_min,
2186 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2187 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2188 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2189 /* This makes catastrophic recovery impossible. However, the user can still
2190 * preserve the important data by using disorder-dump to snapshot their
2191 * prefs, and later to restore it. This is likely to have much small
2192 * long-term storage requirements than record the db logfiles. */
2200 indent-tabs-mode:nil