2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track,
65 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
66 static char **trackdb_new_tid(int *ntracksp,
69 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
71 const struct cache_type cache_files_type = { 86400 };
72 unsigned long cache_files_hits, cache_files_misses;
74 /* setup and teardown ********************************************************/
76 static const char *home; /* home had better not change */
77 DB_ENV *trackdb_env; /* db environment */
79 /** @brief The tracks database
80 * - Keys are UTF-8(NFC(unicode(path name)))
81 * - Values are encoded key-value pairs
82 * - Data is reconstructable data about tracks that currently exist
86 /** @brief The preferences database
88 * - Keys are UTF-8(NFC(unicode(path name)))
89 * - Values are encoded key-value pairs
90 * - Data is user data about tracks (that might not exist any more)
91 * and cannot be reconstructed
95 /** @brief The search database
97 * - Keys are UTF-8(NFKC(casefold(search term)))
98 * - Values are UTF-8(NFC(unicode(path name)))
99 * - There can be more than one value per key
100 * - Presence of key,value means that path matches the search terms
101 * - Only tracks fond in @ref tracks_tracksdb are represented here
102 * - This database can be reconstructed, it contains no user data
104 DB *trackdb_searchdb;
106 /** @brief The tags database
108 * - Keys are UTF-8(NFKC(casefold(tag)))
109 * - Values are UTF-8(NFC(unicode(path name)))
110 * - There can be more than one value per key
111 * - Presence of key,value means that path matches the tag
112 * - This is always in sync with the tags preference
113 * - This database can be reconstructed, it contains no user data
115 DB *trackdb_tagsdb; /* the tags database */
117 /** @brief The global preferences database
118 * - Keys are UTF-8(NFC(preference))
119 * - Values are global preference values
120 * - Data is user data and cannot be reconstructed
122 DB *trackdb_globaldb; /* global preferences */
124 /** @brief The noticed database
125 * - Keys are 64-bit big-endian timestamps
126 * - Values are UTF-8(NFC(unicode(path name)))
127 * - There can be more than one value per key
128 * - Presence of key,value means that path was added at the given time
129 * - Data cannot be reconstructed (but isn't THAT important)
131 DB *trackdb_noticeddb; /* when track noticed */
132 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
133 static pid_t rescan_pid = -1; /* rescanner PID */
134 static int initialized, opened; /* state */
136 /* tracks matched by required_tags */
137 static char **reqtracks;
138 static size_t nreqtracks;
140 /* comparison function for keys */
141 static int compare(DB attribute((unused)) *db_,
142 const DBT *a, const DBT *b) {
143 return compare_path_raw(a->data, a->size, b->data, b->size);
146 /* open environment */
147 void trackdb_init(int recover) {
149 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
152 assert(initialized == 0);
155 if(strcmp(home, config->home))
156 fatal(0, "cannot change db home without server restart");
160 /* create environment */
161 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
163 if((err = trackdb_env->set_alloc(trackdb_env,
164 xmalloc_noptr, xrealloc_noptr, xfree)))
165 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
166 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
167 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
168 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
169 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
170 if((err = trackdb_env->open(trackdb_env, config->home,
176 |recover_type[recover],
178 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
179 trackdb_env->set_errpfx(trackdb_env, "DB");
180 trackdb_env->set_errfile(trackdb_env, stderr);
181 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
182 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
183 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
184 D(("initialized database environment"));
187 /* called when deadlock manager terminates */
188 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
189 pid_t attribute((unused)) pid,
191 const struct rusage attribute((unused)) *rusage,
192 void attribute((unused)) *u) {
193 db_deadlock_pid = -1;
195 fatal(0, "deadlock manager unexpectedly terminated: %s",
198 D(("deadlock manager terminated: %s", wstat(status)));
202 static pid_t subprogram(ev_source *ev, const char *prog,
206 /* If we're in the background then trap subprocess stdout/stderr */
207 if(!(pid = xfork())) {
209 ev_signal_atfork(ev);
210 signal(SIGPIPE, SIG_DFL);
215 /* If we were negatively niced, undo it. We don't bother checking for
216 * error, it's not that important. */
217 setpriority(PRIO_PROCESS, 0, 0);
218 execlp(prog, prog, "--config", configfile,
219 debugging ? "--debug" : "--no-debug",
220 log_default == &log_syslog ? "--syslog" : "--no-syslog",
222 fatal(errno, "error invoking %s", prog);
227 /* start deadlock manager */
228 void trackdb_master(ev_source *ev) {
229 assert(db_deadlock_pid == -1);
230 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
231 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
232 D(("started deadlock manager"));
235 /* close environment */
236 void trackdb_deinit(void) {
240 assert(initialized == 1);
243 /* close the environment */
244 if((err = trackdb_env->close(trackdb_env, 0)))
245 fatal(0, "trackdb_env->close: %s", db_strerror(err));
247 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
248 fatal(errno, "error killing rescanner");
250 /* terminate the deadlock manager */
251 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
252 fatal(errno, "error killing deadlock manager");
253 db_deadlock_pid = -1;
255 D(("deinitialized database environment"));
258 /* open a specific database */
259 static DB *open_db(const char *path,
267 D(("open %s", path));
268 path = config_get_file(path);
269 if((err = db_create(&db, trackdb_env, 0)))
270 fatal(0, "db_create %s: %s", path, db_strerror(err));
272 if((err = db->set_flags(db, dbflags)))
273 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
274 if(dbtype == DB_BTREE)
275 if((err = db->set_bt_compare(db, compare)))
276 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
277 if((err = db->open(db, 0, path, 0, dbtype,
278 openflags | DB_AUTO_COMMIT, mode))) {
279 if((openflags & DB_CREATE) || errno != ENOENT)
280 fatal(0, "db->open %s: %s", path, db_strerror(err));
287 /* open track databases */
288 void trackdb_open(void) {
294 /* check the database version first */
295 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
296 if(trackdb_globaldb) {
297 /* This is an existing database */
301 s = trackdb_get_global("_dbversion");
302 oldversion = s ? atol(s) : 1;
303 if(oldversion != config->dbversion) {
304 /* This database needs upgrading. This isn't implemented yet so we just
306 fatal(0, "database needs upgrading from %ld to %ld",
307 oldversion, config->dbversion);
310 /* Close the database again, we'll open it property below */
311 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
312 fatal(0, "error closing global.db: %s", db_strerror(err));
313 trackdb_globaldb = 0;
315 /* This is a brand new database */
318 /* open the databases */
319 trackdb_tracksdb = open_db("tracks.db",
320 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
321 trackdb_searchdb = open_db("search.db",
322 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
323 trackdb_tagsdb = open_db("tags.db",
324 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
325 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
326 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
327 trackdb_noticeddb = open_db("noticed.db",
328 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
329 /* Stash the database version */
333 snprintf(buf, sizeof buf, "%ld", config->dbversion);
334 trackdb_set_global("_dbversion", buf, 0);
336 D(("opened databases"));
339 /* close track databases */
340 void trackdb_close(void) {
346 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
347 fatal(0, "error closing tracks.db: %s", db_strerror(err));
348 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
349 fatal(0, "error closing search.db: %s", db_strerror(err));
350 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
351 fatal(0, "error closing tags.db: %s", db_strerror(err));
352 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
353 fatal(0, "error closing prefs.db: %s", db_strerror(err));
354 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
355 fatal(0, "error closing global.db: %s", db_strerror(err));
356 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
357 fatal(0, "error closing noticed.db: %s", db_strerror(err));
358 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
359 trackdb_tagsdb = trackdb_globaldb = 0;
360 D(("closed databases"));
363 /* generic db routines *******************************************************/
365 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
366 * DB_LOCK_DEADLOCK. */
367 int trackdb_getdata(DB *db,
374 switch(err = db->get(db, tid, make_key(&key, track),
375 prepare_data(&data), 0)) {
377 *kp = kvp_urldecode(data.data, data.size);
382 case DB_LOCK_DEADLOCK:
383 error(0, "error querying database: %s", db_strerror(err));
386 fatal(0, "error querying database: %s", db_strerror(err));
390 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
391 * DB_LOCK_DEADLOCK. */
392 int trackdb_putdata(DB *db,
400 switch(err = db->put(db, tid, make_key(&key, track),
401 encode_data(&data, k), flags)) {
405 case DB_LOCK_DEADLOCK:
406 error(0, "error updating database: %s", db_strerror(err));
409 fatal(0, "error updating database: %s", db_strerror(err));
413 /* delete a database entry */
414 int trackdb_delkey(DB *db,
420 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
424 case DB_LOCK_DEADLOCK:
425 error(0, "error updating database: %s", db_strerror(err));
428 fatal(0, "error updating database: %s", db_strerror(err));
432 /* open a database cursor */
433 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
437 switch(err = db->cursor(db, tid, &c, 0)) {
439 default: fatal(0, "error creating cursor: %s", db_strerror(err));
444 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
445 int trackdb_closecursor(DBC *c) {
449 switch(err = c->c_close(c)) {
452 case DB_LOCK_DEADLOCK:
453 error(0, "error closing cursor: %s", db_strerror(err));
456 fatal(0, "error closing cursor: %s", db_strerror(err));
460 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
461 int trackdb_delkeydata(DB *db,
469 c = trackdb_opencursor(db, tid);
470 switch(err = c->c_get(c, make_key(&key, word),
471 make_key(&data, track), DB_GET_BOTH)) {
473 switch(err = c->c_del(c, 0)) {
479 case DB_LOCK_DEADLOCK:
480 error(0, "error updating database: %s", db_strerror(err));
483 fatal(0, "c->c_del: %s", db_strerror(err));
488 case DB_LOCK_DEADLOCK:
489 error(0, "error updating database: %s", db_strerror(err));
492 fatal(0, "c->c_get: %s", db_strerror(err));
494 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
498 /* start a transaction */
499 DB_TXN *trackdb_begin_transaction(void) {
503 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
504 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
508 /* abort transaction */
509 void trackdb_abort_transaction(DB_TXN *tid) {
513 if((err = tid->abort(tid)))
514 fatal(0, "tid->abort: %s", db_strerror(err));
517 /* commit transaction */
518 void trackdb_commit_transaction(DB_TXN *tid) {
521 if((err = tid->commit(tid, 0)))
522 fatal(0, "tid->commit: %s", db_strerror(err));
525 /* search/tags shared code ***************************************************/
527 /* comparison function used by dedupe() */
528 static int wordcmp(const void *a, const void *b) {
529 return strcmp(*(const char **)a, *(const char **)b);
532 /* sort and de-dupe VEC */
533 static char **dedupe(char **vec, int nvec) {
536 qsort(vec, nvec, sizeof (char *), wordcmp);
540 for(n = 1; n < nvec; ++n)
541 if(strcmp(vec[n], vec[m - 1]))
548 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
549 static int register_word(DB *db, const char *what,
550 const char *track, const char *word,
555 switch(err = db->put(db, tid, make_key(&key, word),
556 make_key(&data, track), DB_NODUPDATA)) {
560 case DB_LOCK_DEADLOCK:
561 error(0, "error updating %s.db: %s", what, db_strerror(err));
564 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
568 /* search primitives *********************************************************/
570 /* return true iff NAME is a trackname_display_ pref */
571 static int is_display_pref(const char *name) {
572 static const char prefix[] = "trackname_display_";
573 return !strncmp(name, prefix, (sizeof prefix) - 1);
576 /* compute the words of a track name */
577 static char **track_to_words(const char *track,
578 const struct kvp *p) {
582 const char *rootless = track_rootless(track);
585 rootless = track; /* bodge */
587 if((w = words(casefold(strip_extension(rootless)), &nw)))
588 vector_append_many(&v, w, nw);
590 for(; p; p = p->next)
591 if(is_display_pref(p->name))
592 if((w = words(casefold(p->value), &nw)))
593 vector_append_many(&v, w, nw);
594 vector_terminate(&v);
595 return dedupe(v.vec, v.nvec);
598 /* return nonzero iff WORD is a stopword */
599 static int stopword(const char *word) {
602 for(n = 0; n < config->stopword.n
603 && strcmp(word, config->stopword.s[n]); ++n)
605 return n < config->stopword.n;
608 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
609 static int register_search_word(const char *track, const char *word,
611 if(stopword(word)) return 0;
612 return register_word(trackdb_searchdb, "search", track, word, tid);
615 /* Tags **********************************************************************/
617 /* Return nonzero if C is a valid tag character */
618 static int tagchar(int c) {
627 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
628 static char **parsetags(const char *s) {
634 /* skip initial separators */
635 while(*s && (!tagchar(*s) || *s == ' '))
638 /* find the extent of the tag */
640 while(*s && tagchar(*s))
642 /* strip trailing spaces */
643 while(s > t && s[-1] == ' ')
645 vector_append(&v, xstrndup(t, s - t));
646 /* skip intermediate and trailing separators */
647 while(*s && (!tagchar(*s) || *s == ' '))
651 vector_terminate(&v);
652 return dedupe(v.vec, v.nvec);
655 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
656 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
657 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
660 /* aliases *******************************************************************/
662 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
663 * there is no alias sets *aliasp to 0. */
664 static int compute_alias(char **aliasp,
669 const char *s = config->alias, *t, *expansion, *part;
670 int c, used_db = 0, slash_prefix, err;
672 const char *const root = find_track_root(track);
675 /* Bodge for tracks with no root */
680 dynstr_append_string(&d, root);
681 while((c = (unsigned char)*s++)) {
683 dynstr_append(&d, c);
686 if((slash_prefix = (*s == '/')))
689 assert(t != 0); /* validated at startup */
690 part = xstrndup(s, t - s);
691 expansion = getpart(track, "display", part, p, &used_db);
693 if(slash_prefix) dynstr_append(&d, '/');
694 dynstr_append_string(&d, expansion);
696 s = t + 1; /* skip {part} */
698 /* only admit to the alias if we used the db... */
703 dynstr_terminate(&d);
704 /* ...and the answer differs from the original... */
705 if(!strcmp(track, d.vec)) {
709 /* ...and there isn't already a different track with that name (including as
711 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
713 if((s = kvp_get(at, "_alias_for"))
714 && !strcmp(s, track)) {
726 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
727 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
728 * Always sets the return values, even if only to null pointers. */
729 static int gettrackdata(const char *track,
732 const char **actualp,
734 #define GTD_NOALIAS 0x0001
737 const char *actual = track;
738 struct kvp *t = 0, *p = 0;
740 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
741 if((actual = kvp_get(t, "_alias_for"))) {
742 if(flags & GTD_NOALIAS) {
743 error(0, "alias passed to gettrackdata where real path required");
746 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
751 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
756 if(actualp) *actualp = actual;
762 /* trackdb_notice() **********************************************************/
764 /** @brief notice a possibly new track
765 * @return @c DB_NOTFOUND if new, 0 if already known
767 int trackdb_notice(const char *track,
773 tid = trackdb_begin_transaction();
774 err = trackdb_notice_tid(track, path, tid);
775 if((err == DB_LOCK_DEADLOCK)) goto fail;
778 trackdb_abort_transaction(tid);
780 trackdb_commit_transaction(tid);
784 /** @brief notice a possibly new track
785 * @param track NFC UTF-8 track name
786 * @param path Raw path name
787 * @param tid Transaction ID
788 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
790 int trackdb_notice_tid(const char *track,
794 struct kvp *t, *a, *p;
798 /* notice whether the tracks.db entry changes */
800 /* get any existing tracks entry */
801 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
803 ret = err; /* 0 or DB_NOTFOUND */
804 /* this is a real track */
805 t_changed += kvp_set(&t, "_alias_for", 0);
806 t_changed += kvp_set(&t, "_path", path);
807 /* if we have an alias record it in the database */
808 if((err = compute_alias(&alias, track, p, tid))) return err;
810 /* won't overwrite someone else's alias as compute_alias() checks */
811 D(("%s: alias %s", track, alias));
813 kvp_set(&a, "_alias_for", track);
814 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
816 /* update search.db */
817 w = track_to_words(track, p);
818 for(n = 0; w[n]; ++n)
819 if((err = register_search_word(track, w[n], tid)))
822 w = parsetags(kvp_get(p, "tags"));
823 for(n = 0; w[n]; ++n)
824 if((err = register_tag(track, w[n], tid)))
827 /* only store the tracks.db entry if it has changed */
828 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
830 if(ret == DB_NOTFOUND) {
831 uint32_t timestamp[2];
836 timestamp[0] = htonl((uint64_t)now >> 32);
837 timestamp[1] = htonl((uint32_t)now);
838 memset(&key, 0, sizeof key);
839 key.data = timestamp;
840 key.size = sizeof timestamp;
841 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
842 make_key(&data, track), 0)) {
844 case DB_LOCK_DEADLOCK: return err;
845 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
851 /* trackdb_obsolete() ********************************************************/
853 /* obsolete a track */
854 int trackdb_obsolete(const char *track, DB_TXN *tid) {
859 if((err = gettrackdata(track, 0, &p, 0,
860 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
862 else if(err == DB_NOTFOUND) return 0;
863 /* compute the alias, if any, and delete it */
864 if(compute_alias(&alias, track, p, tid)) return err;
866 /* if the alias points to some other track then compute_alias won't
868 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
871 /* update search.db */
872 w = track_to_words(track, p);
873 for(n = 0; w[n]; ++n)
874 if(trackdb_delkeydata(trackdb_searchdb,
875 w[n], track, tid) == DB_LOCK_DEADLOCK)
878 w = parsetags(kvp_get(p, "tags"));
879 for(n = 0; w[n]; ++n)
880 if(trackdb_delkeydata(trackdb_tagsdb,
881 w[n], track, tid) == DB_LOCK_DEADLOCK)
884 /* update tracks.db */
885 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
887 /* We don't delete the prefs, so they survive temporary outages of the
888 * (possibly virtual) track filesystem */
892 /* trackdb_stats() ***********************************************************/
894 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
895 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
897 static const struct statinfo {
900 } statinfo_hash[] = {
916 }, statinfo_btree[] = {
937 /* look up stats for DB */
938 static int get_stats(struct vector *v,
940 const struct statinfo *si,
949 switch(err = database->stat(database, tid, &sp, 0)) {
952 case DB_LOCK_DEADLOCK:
953 error(0, "error querying database: %s", db_strerror(err));
956 fatal(0, "error querying database: %s", db_strerror(err));
958 for(n = 0; n < nsi; ++n) {
959 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
960 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
961 vector_append(v, str);
967 struct search_entry {
972 /* find the top COUNT words in the search database */
973 static int search_league(struct vector *v, int count, DB_TXN *tid) {
974 struct search_entry *se;
977 int err, n = 0, nse = 0, i;
982 cursor = trackdb_opencursor(trackdb_searchdb, tid);
983 se = xmalloc(count * sizeof *se);
984 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
986 if(word && wl == k.size && !strncmp(word, k.data, wl))
989 #define FINALIZE() do { \
990 if(word && (nse < count || n > se[nse - 1].n)) { \
995 while(i > 0 && n > se[i - 1].n) \
997 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
1003 word = xstrndup(k.data, wl = k.size);
1011 case DB_LOCK_DEADLOCK:
1012 error(0, "error querying search database: %s", db_strerror(err));
1015 fatal(0, "error querying search database: %s", db_strerror(err));
1017 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1020 byte_xasprintf(&str, "Top %d search words:", nse);
1021 vector_append(v, str);
1022 for(i = 0; i < nse; ++i) {
1023 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1024 vector_append(v, str);
1029 #define SI(what) statinfo_##what, \
1030 sizeof statinfo_##what / sizeof (struct statinfo)
1032 /* return a list of database stats */
1033 char **trackdb_stats(int *nstatsp) {
1039 tid = trackdb_begin_transaction();
1041 vector_append(&v, (char *)"Tracks database stats:");
1042 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1043 vector_append(&v, (char *)"");
1044 vector_append(&v, (char *)"Search database stats:");
1045 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1046 vector_append(&v, (char *)"");
1047 vector_append(&v, (char *)"Prefs database stats:");
1048 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1049 vector_append(&v, (char *)"");
1050 if(search_league(&v, 10, tid)) goto fail;
1051 vector_terminate(&v);
1054 trackdb_abort_transaction(tid);
1056 trackdb_commit_transaction(tid);
1057 if(nstatsp) *nstatsp = v.nvec;
1061 struct stats_details {
1062 void (*done)(char *data, void *u);
1064 int exited; /* subprocess exited */
1065 int closed; /* pipe close */
1066 int wstat; /* wait status from subprocess */
1067 struct dynstr data[1]; /* data read from pipe */
1070 static void stats_complete(struct stats_details *d) {
1073 if(!(d->exited && d->closed))
1075 byte_xasprintf(&s, "\n"
1077 "track lookup cache hits: %lu\n"
1078 "track lookup cache misses: %lu\n",
1080 cache_files_misses);
1081 dynstr_append_string(d->data, s);
1082 dynstr_terminate(d->data);
1083 d->done(d->data->vec, d->u);
1086 static int stats_finished(ev_source attribute((unused)) *ev,
1087 pid_t attribute((unused)) pid,
1089 const struct rusage attribute((unused)) *rusage,
1091 struct stats_details *const d = u;
1095 error(0, "disorder-stats %s", wstat(status));
1100 static int stats_read(ev_source attribute((unused)) *ev,
1106 struct stats_details *const d = u;
1108 dynstr_append_bytes(d->data, ptr, bytes);
1109 ev_reader_consume(reader, bytes);
1116 static int stats_error(ev_source attribute((unused)) *ev,
1119 struct stats_details *const d = u;
1121 error(errno_value, "error reading from pipe to disorder-stats");
1127 void trackdb_stats_subprocess(ev_source *ev,
1128 void (*done)(char *data, void *u),
1132 struct stats_details *d = xmalloc(sizeof *d);
1134 dynstr_init(d->data);
1138 pid = subprogram(ev, "disorder-stats", p[1]);
1140 ev_child(ev, pid, 0, stats_finished, d);
1141 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1144 /* set a pref (remove if value=0) */
1145 int trackdb_set(const char *track,
1147 const char *value) {
1148 struct kvp *t, *p, *a;
1151 char *oldalias, *newalias, **oldtags = 0, **newtags;
1154 /* TODO: if value matches default then set value=0 */
1158 tid = trackdb_begin_transaction();
1159 if((err = gettrackdata(track, &t, &p, 0,
1160 0, tid)) == DB_LOCK_DEADLOCK)
1162 if(err == DB_NOTFOUND) break;
1163 if(name[0] == '_') {
1164 if(kvp_set(&t, name, value))
1165 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1168 /* get the old alias name */
1169 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1170 /* get the old tags */
1171 if(!strcmp(name, "tags"))
1172 oldtags = parsetags(kvp_get(p, "tags"));
1174 if(kvp_set(&p, name, value))
1175 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1177 /* compute the new alias name */
1178 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1179 /* check whether alias has changed */
1180 if(!(oldalias == newalias
1181 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1182 /* adjust alias records to fit change */
1184 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1187 kvp_set(&a, "_alias_for", track);
1188 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1191 /* check whether tags have changed */
1192 if(!strcmp(name, "tags")) {
1193 newtags = parsetags(value);
1194 while(*oldtags || *newtags) {
1195 if(*oldtags && *newtags) {
1196 cmp = strcmp(*oldtags, *newtags);
1198 /* keeping this tag */
1202 /* old tag fits into a gap in the new list, so delete old */
1205 /* new tag fits into a gap in the old list, so insert new */
1207 } else if(*oldtags) {
1208 /* we've run out of new tags, so remaining old ones are to be
1211 if(trackdb_delkeydata(trackdb_tagsdb,
1212 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1216 /* we've run out of old tags, so remainig new ones are to be
1219 if(register_tag(track, *newtags, tid)) goto fail;
1229 trackdb_abort_transaction(tid);
1231 trackdb_commit_transaction(tid);
1232 return err == 0 ? 0 : -1;
1236 const char *trackdb_get(const char *track,
1238 return kvp_get(trackdb_get_all(track), name);
1241 /* get all prefs as a 0-terminated array */
1242 struct kvp *trackdb_get_all(const char *track) {
1243 struct kvp *t, *p, **pp;
1247 tid = trackdb_begin_transaction();
1248 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1252 trackdb_abort_transaction(tid);
1254 trackdb_commit_transaction(tid);
1255 for(pp = &p; *pp; pp = &(*pp)->next)
1262 const char *trackdb_resolve(const char *track) {
1267 tid = trackdb_begin_transaction();
1268 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1272 trackdb_abort_transaction(tid);
1274 trackdb_commit_transaction(tid);
1278 int trackdb_isalias(const char *track) {
1279 const char *actual = trackdb_resolve(track);
1281 return strcmp(actual, track);
1284 /* test whether a track exists (perhaps an alias) */
1285 int trackdb_exists(const char *track) {
1290 tid = trackdb_begin_transaction();
1291 /* unusually, here we want the return value */
1292 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1296 trackdb_abort_transaction(tid);
1298 trackdb_commit_transaction(tid);
1302 /* return the list of tags */
1303 char **trackdb_alltags(void) {
1309 tid = trackdb_begin_transaction();
1310 err = trackdb_alltags_tid(tid, &taglist);
1312 trackdb_abort_transaction(tid);
1314 trackdb_commit_transaction(tid);
1318 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1325 c = trackdb_opencursor(trackdb_tagsdb, tid);
1326 memset(&k, 0, sizeof k);
1327 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1328 vector_append(&v, xstrndup(k.data, k.size));
1332 case DB_LOCK_DEADLOCK:
1335 fatal(0, "c->c_get: %s", db_strerror(err));
1337 if((err = trackdb_closecursor(c))) return err;
1338 vector_terminate(&v);
1343 /* return 1 iff sorted tag lists A and B have at least one member in common */
1344 static int tag_intersection(char **a, char **b) {
1347 /* Same sort of logic as trackdb_set() above */
1349 if(!(cmp = strcmp(*a, *b))) return 1;
1350 else if(cmp < 0) ++a;
1356 /* Check whether a track is suitable for random play. Returns 0 if it is,
1357 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1359 static int check_suitable(const char *track,
1361 char **required_tags,
1362 char **prohibited_tags) {
1366 const char *pick_at_random, *played_time;
1368 /* don't pick tracks that aren't in any surviving collection (for instance
1369 * you've edited the config but the rescan hasn't done its job yet) */
1370 if(!find_track_root(track)) {
1371 info("found track not in any collection: %s", track);
1374 /* don't pick aliases - only pick the canonical form */
1375 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1376 return DB_LOCK_DEADLOCK;
1377 if(kvp_get(t, "_alias_for"))
1379 /* check that random play is not suppressed for this track */
1380 if((pick_at_random = kvp_get(p, "pick_at_random"))
1381 && !strcmp(pick_at_random, "0"))
1383 /* don't pick a track that's been played in the last 8 hours */
1384 if((played_time = kvp_get(p, "played_time"))) {
1385 last = atoll(played_time);
1387 if(now < last + 8 * 3600) /* TODO configurable */
1390 track_tags = parsetags(kvp_get(p, "tags"));
1391 /* check that no prohibited tag is present for this track */
1392 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1394 /* check that at least one required tags is present for this track */
1395 if(*required_tags && !tag_intersection(track_tags, required_tags))
1400 /* attempt to pick a random non-alias track */
1401 const char *trackdb_random(int tries) {
1406 const char *track, *candidate;
1409 char **required_tags, **prohibited_tags, **tp;
1414 tid = trackdb_begin_transaction();
1415 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1417 required_tags = parsetags(tags);
1418 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1420 prohibited_tags = parsetags(tags);
1422 if(*required_tags) {
1423 /* Bung all the suitable tracks into a hash and convert to a list of keys
1424 * (to eliminate duplicates). We cache this list since it is possible
1425 * that it will be very large. */
1428 for(tp = required_tags; *tp; ++tp) {
1429 c = trackdb_opencursor(trackdb_tagsdb, tid);
1430 memset(&key, 0, sizeof key);
1432 key.size = strlen(*tp);
1434 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1436 hash_add(h, xstrndup(data.data, data.size), 0,
1437 HASH_INSERT_OR_REPLACE);
1439 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1445 case DB_LOCK_DEADLOCK:
1448 fatal(0, "error querying tags.db: %s", db_strerror(err));
1450 trackdb_closecursor(c);
1453 error(0, "required tag %s does not match any tracks", *tp);
1455 nreqtracks = hash_count(h);
1456 reqtracks = hash_keys(h);
1458 while(nreqtracks && !track && tries-- > 0) {
1459 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1460 candidate = reqtracks[r];
1461 switch(check_suitable(candidate, tid,
1462 required_tags, prohibited_tags)) {
1468 case DB_LOCK_DEADLOCK:
1473 /* No required tags. We pick random record numbers in the database
1475 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1478 case DB_LOCK_DEADLOCK:
1479 error(0, "error querying tracks.db: %s", db_strerror(err));
1482 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1485 error(0, "cannot pick tracks at random from an empty database");
1486 while(sp->bt_nkeys && !track && tries-- > 0) {
1487 /* record numbers count from 1 upwards */
1488 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1489 memset(&key, sizeof key, 0);
1490 key.flags = DB_DBT_MALLOC;
1491 key.size = sizeof r;
1493 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1497 case DB_LOCK_DEADLOCK:
1498 error(0, "error querying tracks.db: %s", db_strerror(err));
1501 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1503 candidate = xstrndup(key.data, key.size);
1504 switch(check_suitable(candidate, tid,
1505 required_tags, prohibited_tags)) {
1511 case DB_LOCK_DEADLOCK:
1518 trackdb_closecursor(c);
1520 trackdb_abort_transaction(tid);
1522 trackdb_commit_transaction(tid);
1524 error(0, "could not pick a random track");
1528 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1529 * from the prefs. */
1530 static const char *getpart(const char *track,
1531 const char *context,
1533 const struct kvp *p,
1538 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1539 if((result = kvp_get(p, pref)))
1542 result = trackname_part(track, context, part);
1543 assert(result != 0);
1547 /* get a track name part, like trackname_part(), but taking the database into
1549 const char *trackdb_getpart(const char *track,
1550 const char *context,
1558 /* construct the full pref */
1559 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1561 tid = trackdb_begin_transaction();
1562 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1566 trackdb_abort_transaction(tid);
1568 trackdb_commit_transaction(tid);
1569 return getpart(actual, context, part, p, &used_db);
1572 /* get the raw path name for @track@ (might be an alias) */
1573 const char *trackdb_rawpath(const char *track) {
1579 tid = trackdb_begin_transaction();
1580 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1584 trackdb_abort_transaction(tid);
1586 trackdb_commit_transaction(tid);
1587 if(!(path = kvp_get(t, "_path"))) path = track;
1591 /* trackdb_list **************************************************************/
1593 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1594 * readable at some point */
1596 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1597 * If RE is a null pointer then it matches everything. */
1598 static int track_matches(size_t dl, const char *track, size_t tl,
1606 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1607 case PCRE_ERROR_NOMATCH: return 0;
1610 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1617 static int do_list(struct vector *v, const char *dir,
1618 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1624 size_t l, last_dir_len = 0;
1625 char *last_dir = 0, *track, *alias;
1629 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1632 /* find the first key >= dir */
1633 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1634 /* keep going while we're dealing with <dir/anything> */
1637 && ((char *)k.data)[dl] == '/'
1638 && !memcmp(k.data, dir, dl)) {
1639 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1641 /* we have <dir/component/anything>, so <dir/component> is a directory */
1642 l = ptr - (char *)k.data;
1643 if(what & trackdb_directories)
1645 && l == last_dir_len
1646 && !memcmp(last_dir, k.data, l))) {
1647 last_dir = xstrndup(k.data, last_dir_len = l);
1648 if(track_matches(dl, k.data, l, re))
1649 vector_append(v, last_dir);
1652 /* found a plain file */
1653 if((what & trackdb_files)) {
1654 track = xstrndup(k.data, k.size);
1655 if((err = trackdb_getdata(trackdb_prefsdb,
1656 track, &p, tid)) == DB_LOCK_DEADLOCK)
1658 /* if this file has an alias in the same directory then we skip it */
1659 if((err = compute_alias(&alias, track, p, tid)))
1661 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1662 if(track_matches(dl, k.data, k.size, re))
1663 vector_append(v, track);
1666 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1674 case DB_LOCK_DEADLOCK:
1675 error(0, "error querying database: %s", db_strerror(err));
1678 fatal(0, "error querying database: %s", db_strerror(err));
1681 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1685 /* return the directories or files below @dir@ */
1686 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1694 tid = trackdb_begin_transaction();
1697 if(do_list(&v, dir, what, re, tid))
1700 for(n = 0; n < config->collection.n; ++n)
1701 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1706 trackdb_abort_transaction(tid);
1708 trackdb_commit_transaction(tid);
1709 vector_terminate(&v);
1715 /* If S is tag:something, return something. Else return 0. */
1716 static const char *checktag(const char *s) {
1717 if(!strncmp(s, "tag:", 4))
1723 /* return a list of tracks containing all of the words given. If you
1724 * ask for only stopwords you get no tracks. */
1725 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1726 const char **w, *best = 0, *tag;
1727 char **twords, **tags;
1728 int i, j, n, err, what;
1738 *ntracks = 0; /* for early returns */
1739 /* casefold all the words */
1740 w = xmalloc(nwordlist * sizeof (char *));
1741 for(n = 0; n < nwordlist; ++n) {
1742 w[n] = casefold(wordlist[n]);
1743 if(checktag(w[n])) ++ntags; /* count up tags */
1745 /* find the longest non-stopword */
1746 for(n = 0; n < nwordlist; ++n)
1747 if(!stopword(w[n]) && !checktag(w[n]))
1748 if(!best || strlen(w[n]) > strlen(best))
1750 /* TODO: we should at least in principal be able to identify the word or tag
1751 * with the least matches in log time, and choose that as our primary search
1753 if(ntags && !best) {
1754 /* Only tags are listed. We limit to the first and narrow down with the
1756 best = checktag(w[0]);
1757 db = trackdb_tagsdb;
1760 /* We can limit to some word. */
1761 db = trackdb_searchdb;
1764 /* Only stopwords */
1770 tid = trackdb_begin_transaction();
1771 /* find all the tracks that have that word */
1776 cursor = trackdb_opencursor(db, tid);
1777 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1778 vector_append(&v, xstrndup(d.data, d.size));
1785 case DB_LOCK_DEADLOCK:
1786 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1789 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1791 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1793 /* do a naive search over that (hopefuly fairly small) list of tracks */
1795 for(n = 0; n < v.nvec; ++n) {
1796 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1799 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1802 twords = track_to_words(v.vec[n], p);
1803 tags = parsetags(kvp_get(p, "tags"));
1804 for(i = 0; i < nwordlist; ++i) {
1805 if((tag = checktag(w[i]))) {
1806 /* Track must have this tag */
1807 for(j = 0; tags[j]; ++j)
1808 if(!strcmp(tag, tags[j])) break; /* tag found */
1809 if(!tags[j]) break; /* tag not found */
1811 /* Track must contain this word */
1812 for(j = 0; twords[j]; ++j)
1813 if(!strcmp(w[i], twords[j])) break; /* word found */
1814 if(!twords[j]) break; /* word not found */
1817 if(i >= nwordlist) /* all words found */
1818 vector_append(&u, v.vec[n]);
1822 trackdb_closecursor(cursor);
1824 trackdb_abort_transaction(tid);
1825 info("retrying search");
1827 trackdb_commit_transaction(tid);
1828 vector_terminate(&u);
1834 /* trackdb_scan **************************************************************/
1836 int trackdb_scan(const char *root,
1837 int (*callback)(const char *track,
1845 const size_t root_len = root ? strlen(root) : 0;
1850 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1852 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1855 memset(&k, 0, sizeof k);
1856 err = cursor->c_get(cursor, &k, prepare_data(&d),
1861 || (k.size > root_len
1862 && !strncmp(k.data, root, root_len)
1863 && ((char *)k.data)[root_len] == '/')) {
1864 data = kvp_urldecode(d.data, d.size);
1865 if(kvp_get(data, "_path")) {
1866 track = xstrndup(k.data, k.size);
1867 /* Advance to the next track before the callback so that the callback
1868 * may safely delete the track */
1869 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1870 if((cberr = callback(track, data, u, tid))) {
1875 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1879 trackdb_closecursor(cursor);
1886 case DB_LOCK_DEADLOCK:
1887 error(0, "c->c_get: %s", db_strerror(err));
1890 fatal(0, "c->c_get: %s", db_strerror(err));
1894 /* trackdb_rescan ************************************************************/
1896 /* called when the rescanner terminates */
1897 static int reap_rescan(ev_source attribute((unused)) *ev,
1900 const struct rusage attribute((unused)) *rusage,
1901 void attribute((unused)) *u) {
1902 if(pid == rescan_pid) rescan_pid = -1;
1904 error(0, "disorderd-rescan: %s", wstat(status));
1906 D(("disorderd-rescan terminate: %s", wstat(status)));
1907 /* Our cache of file lookups is out of date now */
1908 cache_clean(&cache_files_type);
1909 eventlog("rescanned", (char *)0);
1913 void trackdb_rescan(ev_source *ev) {
1914 if(rescan_pid != -1) {
1915 error(0, "rescan already underway");
1918 rescan_pid = subprogram(ev, RESCAN, -1);
1919 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1920 D(("started rescanner"));
1924 int trackdb_rescan_cancel(void) {
1925 if(rescan_pid == -1) return 0;
1926 if(kill(rescan_pid, SIGTERM) < 0)
1927 fatal(errno, "error killing rescanner");
1932 /* global prefs **************************************************************/
1934 void trackdb_set_global(const char *name,
1942 tid = trackdb_begin_transaction();
1943 if(!(err = trackdb_set_global_tid(name, value, tid)))
1945 trackdb_abort_transaction(tid);
1947 trackdb_commit_transaction(tid);
1948 /* log important state changes */
1949 if(!strcmp(name, "playing")) {
1950 state = !value || !strcmp(value, "yes");
1951 info("playing %s by %s",
1952 state ? "enabled" : "disabled",
1954 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
1956 if(!strcmp(name, "random-play")) {
1957 state = !value || !strcmp(value, "yes");
1958 info("random play %s by %s",
1959 state ? "enabled" : "disabled",
1961 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
1963 if(!strcmp(name, "required-tags"))
1967 int trackdb_set_global_tid(const char *name,
1973 memset(&k, 0, sizeof k);
1974 memset(&d, 0, sizeof d);
1975 k.data = (void *)name;
1976 k.size = strlen(name);
1978 d.data = (void *)value;
1979 d.size = strlen(value);
1982 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
1984 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
1985 if(err == DB_LOCK_DEADLOCK) return err;
1987 fatal(0, "error updating database: %s", db_strerror(err));
1991 const char *trackdb_get_global(const char *name) {
1997 tid = trackdb_begin_transaction();
1998 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2000 trackdb_abort_transaction(tid);
2002 trackdb_commit_transaction(tid);
2006 int trackdb_get_global_tid(const char *name,
2012 memset(&k, 0, sizeof k);
2013 k.data = (void *)name;
2014 k.size = strlen(name);
2015 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2016 prepare_data(&d), 0)) {
2018 *rp = xstrndup(d.data, d.size);
2023 case DB_LOCK_DEADLOCK:
2026 fatal(0, "error reading database: %s", db_strerror(err));
2030 /** @brief Retrieve the most recently added tracks
2031 * @param ntracksp Where to put count, or 0
2032 * @param maxtracks Maximum number of tracks to retrieve
2033 * @return null-terminated array of track names
2035 * The most recently added track is first in the array.
2037 char **trackdb_new(int *ntracksp,
2043 tid = trackdb_begin_transaction();
2044 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2047 trackdb_abort_transaction(tid);
2049 trackdb_commit_transaction(tid);
2053 /** @brief Retrieve the most recently added tracks
2054 * @param ntracksp Where to put count, or 0
2055 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2056 * @param tid Transaction ID
2057 * @return null-terminated array of track names, or NULL on deadlock
2059 * The most recently added track is first in the array.
2061 static char **trackdb_new_tid(int *ntracksp,
2067 struct vector tracks[1];
2069 vector_init(tracks);
2070 c = trackdb_opencursor(trackdb_noticeddb, tid);
2071 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2072 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2073 vector_append(tracks, xstrndup(d.data, d.size));
2075 case 0: /* hit maxtracks */
2076 case DB_NOTFOUND: /* ran out of tracks */
2078 case DB_LOCK_DEADLOCK:
2079 trackdb_closecursor(c);
2082 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2084 if((err = trackdb_closecursor(c)))
2085 return 0; /* deadlock */
2086 vector_terminate(tracks);
2088 *ntracksp = tracks->nvec;
2092 /** @brief Expire noticed.db
2093 * @param earliest Earliest timestamp to keep
2095 void trackdb_expire_noticed(time_t earliest) {
2099 tid = trackdb_begin_transaction();
2100 if(!trackdb_expire_noticed_tid(earliest, tid))
2102 trackdb_abort_transaction(tid);
2104 trackdb_commit_transaction(tid);
2107 /** @brief Expire noticed.db
2108 * @param earliest Earliest timestamp to keep
2109 * @param tid Transaction ID
2110 * @return 0 or DB_LOCK_DEADLOCK
2112 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2120 c = trackdb_opencursor(trackdb_noticeddb, tid);
2121 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2123 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2124 if(when >= earliest)
2126 if((err = c->c_del(c, 0))) {
2127 if(err != DB_LOCK_DEADLOCK)
2128 fatal(0, "error deleting expired noticed.db entry: %s",
2134 if(err == DB_NOTFOUND)
2136 if(err && err != DB_LOCK_DEADLOCK)
2137 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2139 if((err = trackdb_closecursor(c))) {
2140 if(err != DB_LOCK_DEADLOCK)
2141 fatal(0, "error closing cursor: %s", db_strerror(err));
2145 info("expired %d tracks from noticed.db", count);
2149 /* tidying up ****************************************************************/
2151 void trackdb_gc(void) {
2155 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2156 config->checkpoint_kbyte,
2157 config->checkpoint_min,
2159 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2160 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2161 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2162 /* This makes catastrophic recovery impossible. However, the user can still
2163 * preserve the important data by using disorder-dump to snapshot their
2164 * prefs, and later to restore it. This is likely to have much small
2165 * long-term storage requirements than record the db logfiles. */
2173 indent-tabs-mode:nil