2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 /** @file server/trackdb.c
21 * @brief Track database */
29 #include <sys/socket.h>
36 #include <sys/resource.h>
38 #include <arpa/inet.h>
47 #include "configuration.h"
52 #include "trackname.h"
53 #include "trackdb-int.h"
61 #define RESCAN "disorder-rescan"
62 #define DEADLOCK "disorder-deadlock"
64 static const char *getpart(const char *track,
69 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
70 static char **trackdb_new_tid(int *ntracksp,
73 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
74 static char *normalize_tag(const char *s, size_t ns);
76 const struct cache_type cache_files_type = { 86400 };
77 unsigned long cache_files_hits, cache_files_misses;
79 /** @brief Set by trackdb_open() */
80 int trackdb_existing_database;
82 /* setup and teardown ********************************************************/
84 static const char *home; /* home had better not change */
85 DB_ENV *trackdb_env; /* db environment */
87 /** @brief The tracks database
88 * - Keys are UTF-8(NFC(unicode(path name)))
89 * - Values are encoded key-value pairs
90 * - Data is reconstructable data about tracks that currently exist
94 /** @brief The preferences database
96 * - Keys are UTF-8(NFC(unicode(path name)))
97 * - Values are encoded key-value pairs
98 * - Data is user data about tracks (that might not exist any more)
99 * and cannot be reconstructed
103 /** @brief The search database
105 * - Keys are UTF-8(NFKC(casefold(search term)))
106 * - Values are UTF-8(NFC(unicode(path name)))
107 * - There can be more than one value per key
108 * - Presence of key,value means that path matches the search terms
109 * - Only tracks fond in @ref tracks_tracksdb are represented here
110 * - This database can be reconstructed, it contains no user data
112 DB *trackdb_searchdb;
114 /** @brief The tags database
116 * - Keys are UTF-8(NFKC(casefold(tag)))
117 * - Values are UTF-8(NFC(unicode(path name)))
118 * - There can be more than one value per key
119 * - Presence of key,value means that path matches the tag
120 * - This is always in sync with the tags preference
121 * - This database can be reconstructed, it contains no user data
123 DB *trackdb_tagsdb; /* the tags database */
125 /** @brief The global preferences database
126 * - Keys are UTF-8(NFC(preference))
127 * - Values are global preference values
128 * - Data is user data and cannot be reconstructed
130 DB *trackdb_globaldb; /* global preferences */
132 /** @brief The noticed database
133 * - Keys are 64-bit big-endian timestamps
134 * - Values are UTF-8(NFC(unicode(path name)))
135 * - There can be more than one value per key
136 * - Presence of key,value means that path was added at the given time
137 * - Data cannot be reconstructed (but isn't THAT important)
139 DB *trackdb_noticeddb; /* when track noticed */
140 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
141 static pid_t rescan_pid = -1; /* rescanner PID */
142 static int initialized, opened; /* state */
144 /* tracks matched by required_tags */
145 static char **reqtracks;
146 static size_t nreqtracks;
148 /* comparison function for keys */
149 static int compare(DB attribute((unused)) *db_,
150 const DBT *a, const DBT *b) {
151 return compare_path_raw(a->data, a->size, b->data, b->size);
154 /** @brief Open database environment
155 * @param flags Flags word
157 * Flags should be one of:
158 * - @ref TRACKDB_NO_RECOVER
159 * - @ref TRACKDB_NORMAL_RECOVER
160 * - @ref TRACKDB_FATAL_RECOVER
162 void trackdb_init(int flags) {
164 const int recover = flags & TRACKDB_RECOVER_MASK;
165 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
168 assert(initialized == 0);
171 if(strcmp(home, config->home))
172 fatal(0, "cannot change db home without server restart");
176 /* create environment */
177 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
179 if((err = trackdb_env->set_alloc(trackdb_env,
180 xmalloc_noptr, xrealloc_noptr, xfree)))
181 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
182 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
183 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
184 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
185 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
186 if((err = trackdb_env->open(trackdb_env, config->home,
192 |recover_type[recover],
194 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
195 trackdb_env->set_errpfx(trackdb_env, "DB");
196 trackdb_env->set_errfile(trackdb_env, stderr);
197 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
198 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
199 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
200 D(("initialized database environment"));
203 /* called when deadlock manager terminates */
204 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
205 pid_t attribute((unused)) pid,
207 const struct rusage attribute((unused)) *rusage,
208 void attribute((unused)) *u) {
209 db_deadlock_pid = -1;
211 fatal(0, "deadlock manager unexpectedly terminated: %s",
214 D(("deadlock manager terminated: %s", wstat(status)));
218 static pid_t subprogram(ev_source *ev, const char *prog,
222 /* If we're in the background then trap subprocess stdout/stderr */
223 if(!(pid = xfork())) {
226 ev_signal_atfork(ev);
227 signal(SIGPIPE, SIG_DFL);
232 /* If we were negatively niced, undo it. We don't bother checking for
233 * error, it's not that important. */
234 setpriority(PRIO_PROCESS, 0, 0);
235 execlp(prog, prog, "--config", configfile,
236 debugging ? "--debug" : "--no-debug",
237 log_default == &log_syslog ? "--syslog" : "--no-syslog",
239 fatal(errno, "error invoking %s", prog);
244 /* start deadlock manager */
245 void trackdb_master(ev_source *ev) {
246 assert(db_deadlock_pid == -1);
247 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
248 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
249 D(("started deadlock manager"));
252 /* close environment */
253 void trackdb_deinit(void) {
257 assert(initialized == 1);
260 /* close the environment */
261 if((err = trackdb_env->close(trackdb_env, 0)))
262 fatal(0, "trackdb_env->close: %s", db_strerror(err));
264 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
265 fatal(errno, "error killing rescanner");
267 /* terminate the deadlock manager */
268 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
269 fatal(errno, "error killing deadlock manager");
270 db_deadlock_pid = -1;
272 D(("deinitialized database environment"));
275 /* open a specific database */
276 static DB *open_db(const char *path,
284 D(("open %s", path));
285 path = config_get_file(path);
286 if((err = db_create(&db, trackdb_env, 0)))
287 fatal(0, "db_create %s: %s", path, db_strerror(err));
289 if((err = db->set_flags(db, dbflags)))
290 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
291 if(dbtype == DB_BTREE)
292 if((err = db->set_bt_compare(db, compare)))
293 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
294 if((err = db->open(db, 0, path, 0, dbtype,
295 openflags | DB_AUTO_COMMIT, mode))) {
296 if((openflags & DB_CREATE) || errno != ENOENT)
297 fatal(0, "db->open %s: %s", path, db_strerror(err));
304 /** @brief Open track databases
305 * @param Flags flags word
307 * @p flags should be one of:
308 * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted
309 * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted
310 * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade
312 void trackdb_open(int flags) {
319 /* check the database version first */
320 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
321 if(trackdb_globaldb) {
322 /* This is an existing database */
326 s = trackdb_get_global("_dbversion");
327 /* Close the database again, we'll open it property below */
328 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
329 fatal(0, "error closing global.db: %s", db_strerror(err));
330 trackdb_globaldb = 0;
331 /* Convert version string to an integer */
332 oldversion = s ? atol(s) : 1;
333 if(oldversion > config->dbversion) {
334 /* Database is from the future; we never allow this. */
335 fatal(0, "this version of DisOrder is too old for database version %ld",
338 if(oldversion < config->dbversion) {
339 /* Database version is out of date */
340 switch(flags & TRACKDB_UPGRADE_MASK) {
341 case TRACKDB_NO_UPGRADE:
342 /* This database needs upgrading but this is not permitted */
343 fatal(0, "database needs upgrading from %ld to %ld",
344 oldversion, config->dbversion);
345 case TRACKDB_CAN_UPGRADE:
346 /* This database needs upgrading */
347 info("invoking disorder-dbupgrade to upgrade from %ld to %ld",
348 oldversion, config->dbversion);
349 pid = subprogram(0, "disorder-dbupgrade", -1);
350 while(waitpid(pid, &err, 0) == -1 && errno == EINTR)
353 fatal(0, "disorder-dbupgrade %s", wstat(err));
354 info("disorder-dbupgrade succeeded");
356 case TRACKDB_OPEN_FOR_UPGRADE:
362 if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) {
363 /* This doesn't make any sense */
364 fatal(0, "database is already at current version");
366 trackdb_existing_database = 1;
368 if(flags & TRACKDB_OPEN_FOR_UPGRADE) {
369 /* Cannot upgrade a new database */
370 fatal(0, "cannot upgrade a database that does not exist");
372 /* This is a brand new database */
373 trackdb_existing_database = 0;
375 /* open the databases */
376 trackdb_tracksdb = open_db("tracks.db",
377 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
378 trackdb_searchdb = open_db("search.db",
379 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
380 trackdb_tagsdb = open_db("tags.db",
381 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
382 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
383 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
384 trackdb_noticeddb = open_db("noticed.db",
385 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
386 if(!trackdb_existing_database) {
387 /* Stash the database version */
390 assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE));
391 snprintf(buf, sizeof buf, "%ld", config->dbversion);
392 trackdb_set_global("_dbversion", buf, 0);
394 D(("opened databases"));
397 /* close track databases */
398 void trackdb_close(void) {
404 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
405 fatal(0, "error closing tracks.db: %s", db_strerror(err));
406 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
407 fatal(0, "error closing search.db: %s", db_strerror(err));
408 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
409 fatal(0, "error closing tags.db: %s", db_strerror(err));
410 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
411 fatal(0, "error closing prefs.db: %s", db_strerror(err));
412 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
413 fatal(0, "error closing global.db: %s", db_strerror(err));
414 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
415 fatal(0, "error closing noticed.db: %s", db_strerror(err));
416 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
417 trackdb_tagsdb = trackdb_globaldb = 0;
418 D(("closed databases"));
421 /* generic db routines *******************************************************/
423 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
424 * DB_LOCK_DEADLOCK. */
425 int trackdb_getdata(DB *db,
432 switch(err = db->get(db, tid, make_key(&key, track),
433 prepare_data(&data), 0)) {
435 *kp = kvp_urldecode(data.data, data.size);
440 case DB_LOCK_DEADLOCK:
441 error(0, "error querying database: %s", db_strerror(err));
444 fatal(0, "error querying database: %s", db_strerror(err));
448 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
449 * DB_LOCK_DEADLOCK. */
450 int trackdb_putdata(DB *db,
458 switch(err = db->put(db, tid, make_key(&key, track),
459 encode_data(&data, k), flags)) {
463 case DB_LOCK_DEADLOCK:
464 error(0, "error updating database: %s", db_strerror(err));
467 fatal(0, "error updating database: %s", db_strerror(err));
471 /* delete a database entry */
472 int trackdb_delkey(DB *db,
478 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
482 case DB_LOCK_DEADLOCK:
483 error(0, "error updating database: %s", db_strerror(err));
486 fatal(0, "error updating database: %s", db_strerror(err));
490 /* open a database cursor */
491 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
495 switch(err = db->cursor(db, tid, &c, 0)) {
497 default: fatal(0, "error creating cursor: %s", db_strerror(err));
502 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
503 int trackdb_closecursor(DBC *c) {
507 switch(err = c->c_close(c)) {
510 case DB_LOCK_DEADLOCK:
511 error(0, "error closing cursor: %s", db_strerror(err));
514 fatal(0, "error closing cursor: %s", db_strerror(err));
518 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
519 int trackdb_delkeydata(DB *db,
527 c = trackdb_opencursor(db, tid);
528 switch(err = c->c_get(c, make_key(&key, word),
529 make_key(&data, track), DB_GET_BOTH)) {
531 switch(err = c->c_del(c, 0)) {
537 case DB_LOCK_DEADLOCK:
538 error(0, "error updating database: %s", db_strerror(err));
541 fatal(0, "c->c_del: %s", db_strerror(err));
546 case DB_LOCK_DEADLOCK:
547 error(0, "error updating database: %s", db_strerror(err));
550 fatal(0, "c->c_get: %s", db_strerror(err));
552 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
556 /* start a transaction */
557 DB_TXN *trackdb_begin_transaction(void) {
561 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
562 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
566 /* abort transaction */
567 void trackdb_abort_transaction(DB_TXN *tid) {
571 if((err = tid->abort(tid)))
572 fatal(0, "tid->abort: %s", db_strerror(err));
575 /* commit transaction */
576 void trackdb_commit_transaction(DB_TXN *tid) {
579 if((err = tid->commit(tid, 0)))
580 fatal(0, "tid->commit: %s", db_strerror(err));
583 /* search/tags shared code ***************************************************/
585 /* comparison function used by dedupe() */
586 static int wordcmp(const void *a, const void *b) {
587 return strcmp(*(const char **)a, *(const char **)b);
590 /* sort and de-dupe VEC */
591 static char **dedupe(char **vec, int nvec) {
594 qsort(vec, nvec, sizeof (char *), wordcmp);
598 for(n = 1; n < nvec; ++n)
599 if(strcmp(vec[n], vec[m - 1]))
606 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
607 static int register_word(DB *db, const char *what,
608 const char *track, const char *word,
613 switch(err = db->put(db, tid, make_key(&key, word),
614 make_key(&data, track), DB_NODUPDATA)) {
618 case DB_LOCK_DEADLOCK:
619 error(0, "error updating %s.db: %s", what, db_strerror(err));
622 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
626 /* search primitives *********************************************************/
628 /* return true iff NAME is a trackname_display_ pref */
629 static int is_display_pref(const char *name) {
630 static const char prefix[] = "trackname_display_";
631 return !strncmp(name, prefix, (sizeof prefix) - 1);
634 /** @brief Word_Break property tailor that treats underscores as spaces */
635 static int tailor_underscore_Word_Break_Other(uint32_t c) {
639 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
640 return unicode_Word_Break_Other;
644 /** @brief Remove all combining characters in-place
645 * @param s Pointer to start of string
646 * @param ns Length of string
647 * @return New, possiblby reduced, length
649 static size_t remove_combining_chars(uint32_t *s, size_t ns) {
650 uint32_t *start = s, *t = s, *end = s + ns;
653 const uint32_t c = *s++;
654 if(!utf32_combining_class(c))
660 /** @brief Normalize and split a string using a given tailoring */
661 static void word_split(struct vector *v,
663 unicode_property_tailor *pt) {
665 uint32_t *t32, **w32;
667 /* Convert to UTF-32 */
668 if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32)))
670 /* Erase case distinctions */
671 if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32)))
673 /* Drop combining characters */
674 nt32 = remove_combining_chars(t32, nt32);
675 /* Split into words, treating _ as a space */
676 w32 = utf32_word_split(t32, nt32, &nw, pt);
677 /* Convert words back to UTF-8 and append to result */
678 for(i = 0; i < nw; ++i)
679 vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
682 /** @brief Normalize a tag
684 * @param ns Length of tag
685 * @return Normalized string or NULL on error
687 * The return value will be:
689 * - have no leading or trailing space
690 * - have no combining characters
691 * - all spacing between words will be a single U+0020 SPACE
693 static char *normalize_tag(const char *s, size_t ns) {
694 uint32_t *s32, **w32;
695 size_t ns32, nw32, i;
698 if(!(s32 = utf8_to_utf32(s, ns, &ns32)))
700 if(!(s32 = utf32_casefold_compat(s32, ns32, &ns32))) /* ->NFKD */
702 ns32 = remove_combining_chars(s32, ns32);
703 /* Split into words, no Word_Break tailoring */
704 w32 = utf32_word_split(s32, ns32, &nw32, 0);
705 /* Compose back into a string */
707 for(i = 0; i < nw32; ++i) {
709 dynstr_append(d, ' ');
710 dynstr_append_string(d, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
716 /* compute the words of a track name */
717 static char **track_to_words(const char *track,
718 const struct kvp *p) {
720 const char *rootless = track_rootless(track);
723 rootless = track; /* bodge */
725 rootless = strip_extension(rootless);
726 word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other);
727 for(; p; p = p->next)
728 if(is_display_pref(p->name))
729 word_split(&v, p->value, 0);
730 vector_terminate(&v);
731 return dedupe(v.vec, v.nvec);
734 /* return nonzero iff WORD is a stopword */
735 static int stopword(const char *word) {
738 for(n = 0; n < config->stopword.n
739 && strcmp(word, config->stopword.s[n]); ++n)
741 return n < config->stopword.n;
744 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
745 static int register_search_word(const char *track, const char *word,
747 if(stopword(word)) return 0;
748 return register_word(trackdb_searchdb, "search", track, word, tid);
751 /* Tags **********************************************************************/
753 /* Return nonzero if C is a valid tag character */
754 static int tagchar(int c) {
763 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
764 static char **parsetags(const char *s) {
770 /* skip initial separators */
771 while(*s && (!tagchar(*s) || *s == ' '))
774 /* find the extent of the tag */
776 while(*s && tagchar(*s))
778 /* strip trailing spaces */
779 while(s > t && s[-1] == ' ')
781 /* add tag to list */
782 vector_append(&v, normalize_tag(t, (size_t)(s - t)));
783 /* skip intermediate and trailing separators */
784 while(*s && (!tagchar(*s) || *s == ' '))
788 vector_terminate(&v);
789 return dedupe(v.vec, v.nvec);
792 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
793 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
794 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
797 /* aliases *******************************************************************/
799 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
800 * there is no alias sets *aliasp to 0. */
801 static int compute_alias(char **aliasp,
806 const char *s = config->alias, *t, *expansion, *part;
807 int c, used_db = 0, slash_prefix, err;
809 const char *const root = find_track_root(track);
812 /* Bodge for tracks with no root */
817 dynstr_append_string(&d, root);
818 while((c = (unsigned char)*s++)) {
820 dynstr_append(&d, c);
823 if((slash_prefix = (*s == '/')))
826 assert(t != 0); /* validated at startup */
827 part = xstrndup(s, t - s);
828 expansion = getpart(track, "display", part, p, &used_db);
830 if(slash_prefix) dynstr_append(&d, '/');
831 dynstr_append_string(&d, expansion);
833 s = t + 1; /* skip {part} */
835 /* only admit to the alias if we used the db... */
840 dynstr_terminate(&d);
841 /* ...and the answer differs from the original... */
842 if(!strcmp(track, d.vec)) {
846 /* ...and there isn't already a different track with that name (including as
848 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
850 if((s = kvp_get(at, "_alias_for"))
851 && !strcmp(s, track)) {
863 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
864 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
865 * Always sets the return values, even if only to null pointers. */
866 static int gettrackdata(const char *track,
869 const char **actualp,
871 #define GTD_NOALIAS 0x0001
874 const char *actual = track;
875 struct kvp *t = 0, *p = 0;
877 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
878 if((actual = kvp_get(t, "_alias_for"))) {
879 if(flags & GTD_NOALIAS) {
880 error(0, "alias passed to gettrackdata where real path required");
883 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
888 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
893 if(actualp) *actualp = actual;
899 /* trackdb_notice() **********************************************************/
901 /** @brief notice a possibly new track
902 * @return @c DB_NOTFOUND if new, 0 if already known
904 int trackdb_notice(const char *track,
910 tid = trackdb_begin_transaction();
911 err = trackdb_notice_tid(track, path, tid);
912 if((err == DB_LOCK_DEADLOCK)) goto fail;
915 trackdb_abort_transaction(tid);
917 trackdb_commit_transaction(tid);
921 /** @brief notice a possibly new track
922 * @param track NFC UTF-8 track name
923 * @param path Raw path name
924 * @param tid Transaction ID
925 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
927 int trackdb_notice_tid(const char *track,
931 struct kvp *t, *a, *p;
935 /* notice whether the tracks.db entry changes */
937 /* get any existing tracks entry */
938 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
940 ret = err; /* 0 or DB_NOTFOUND */
941 /* this is a real track */
942 t_changed += kvp_set(&t, "_alias_for", 0);
943 t_changed += kvp_set(&t, "_path", path);
944 /* if we have an alias record it in the database */
945 if((err = compute_alias(&alias, track, p, tid))) return err;
947 /* won't overwrite someone else's alias as compute_alias() checks */
948 D(("%s: alias %s", track, alias));
950 kvp_set(&a, "_alias_for", track);
951 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
953 /* update search.db */
954 w = track_to_words(track, p);
955 for(n = 0; w[n]; ++n)
956 if((err = register_search_word(track, w[n], tid)))
959 w = parsetags(kvp_get(p, "tags"));
960 for(n = 0; w[n]; ++n)
961 if((err = register_tag(track, w[n], tid)))
964 /* only store the tracks.db entry if it has changed */
965 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
967 if(ret == DB_NOTFOUND) {
968 uint32_t timestamp[2];
973 timestamp[0] = htonl((uint64_t)now >> 32);
974 timestamp[1] = htonl((uint32_t)now);
975 memset(&key, 0, sizeof key);
976 key.data = timestamp;
977 key.size = sizeof timestamp;
978 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
979 make_key(&data, track), 0)) {
981 case DB_LOCK_DEADLOCK: return err;
982 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
988 /* trackdb_obsolete() ********************************************************/
990 /* obsolete a track */
991 int trackdb_obsolete(const char *track, DB_TXN *tid) {
996 if((err = gettrackdata(track, 0, &p, 0,
997 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
999 else if(err == DB_NOTFOUND) return 0;
1000 /* compute the alias, if any, and delete it */
1001 if(compute_alias(&alias, track, p, tid)) return err;
1003 /* if the alias points to some other track then compute_alias won't
1005 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
1008 /* update search.db */
1009 w = track_to_words(track, p);
1010 for(n = 0; w[n]; ++n)
1011 if(trackdb_delkeydata(trackdb_searchdb,
1012 w[n], track, tid) == DB_LOCK_DEADLOCK)
1014 /* update tags.db */
1015 w = parsetags(kvp_get(p, "tags"));
1016 for(n = 0; w[n]; ++n)
1017 if(trackdb_delkeydata(trackdb_tagsdb,
1018 w[n], track, tid) == DB_LOCK_DEADLOCK)
1021 /* update tracks.db */
1022 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
1024 /* We don't delete the prefs, so they survive temporary outages of the
1025 * (possibly virtual) track filesystem */
1029 /* trackdb_stats() ***********************************************************/
1031 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
1032 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
1034 static const struct statinfo {
1037 } statinfo_hash[] = {
1053 }, statinfo_btree[] = {
1074 /* look up stats for DB */
1075 static int get_stats(struct vector *v,
1077 const struct statinfo *si,
1086 switch(err = database->stat(database, tid, &sp, 0)) {
1089 case DB_LOCK_DEADLOCK:
1090 error(0, "error querying database: %s", db_strerror(err));
1093 fatal(0, "error querying database: %s", db_strerror(err));
1095 for(n = 0; n < nsi; ++n) {
1096 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
1097 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
1098 vector_append(v, str);
1104 /** @brief One entry in the search league */
1105 struct search_entry {
1110 /** @brief Add a word to the search league
1111 * @param se Pointer to search league
1112 * @param count Maximum size for search league
1113 * @param nse Current size of search league
1114 * @param word New word, or NULL
1115 * @param n How often @p word appears
1116 * @return New size of search league
1118 static int register_search_entry(struct search_entry *se,
1125 if(word && (nse < count || n > se[nse - 1].n)) {
1126 /* Find the starting point */
1131 /* Find the insertion point */
1132 while(i > 0 && n > se[i - 1].n)
1134 memmove(&se[i + 1], &se[i], (nse - i - 1) * sizeof *se);
1141 /* find the top COUNT words in the search database */
1142 static int search_league(struct vector *v, int count, DB_TXN *tid) {
1143 struct search_entry *se;
1146 int err, n = 0, nse = 0, i;
1151 cursor = trackdb_opencursor(trackdb_searchdb, tid);
1152 se = xmalloc(count * sizeof *se);
1153 /* Walk across the whole database counting up the number of times each
1155 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
1157 if(word && wl == k.size && !strncmp(word, k.data, wl))
1158 ++n; /* same word again */
1160 nse = register_search_entry(se, count, nse, word, n);
1161 word = xstrndup(k.data, wl = k.size);
1169 case DB_LOCK_DEADLOCK:
1170 error(0, "error querying search database: %s", db_strerror(err));
1173 fatal(0, "error querying search database: %s", db_strerror(err));
1175 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1177 nse = register_search_entry(se, count, nse, word, n);
1178 byte_xasprintf(&str, "Top %d search words:", nse);
1179 vector_append(v, str);
1180 for(i = 0; i < nse; ++i) {
1181 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1182 vector_append(v, str);
1187 #define SI(what) statinfo_##what, \
1188 sizeof statinfo_##what / sizeof (struct statinfo)
1190 /* return a list of database stats */
1191 char **trackdb_stats(int *nstatsp) {
1197 tid = trackdb_begin_transaction();
1199 vector_append(&v, (char *)"Tracks database stats:");
1200 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1201 vector_append(&v, (char *)"");
1202 vector_append(&v, (char *)"Search database stats:");
1203 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1204 vector_append(&v, (char *)"");
1205 vector_append(&v, (char *)"Prefs database stats:");
1206 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1207 vector_append(&v, (char *)"");
1208 if(search_league(&v, 10, tid)) goto fail;
1209 vector_terminate(&v);
1212 trackdb_abort_transaction(tid);
1214 trackdb_commit_transaction(tid);
1215 if(nstatsp) *nstatsp = v.nvec;
1219 struct stats_details {
1220 void (*done)(char *data, void *u);
1222 int exited; /* subprocess exited */
1223 int closed; /* pipe close */
1224 int wstat; /* wait status from subprocess */
1225 struct dynstr data[1]; /* data read from pipe */
1228 static void stats_complete(struct stats_details *d) {
1231 if(!(d->exited && d->closed))
1233 byte_xasprintf(&s, "\n"
1235 "track lookup cache hits: %lu\n"
1236 "track lookup cache misses: %lu\n",
1238 cache_files_misses);
1239 dynstr_append_string(d->data, s);
1240 dynstr_terminate(d->data);
1241 d->done(d->data->vec, d->u);
1244 static int stats_finished(ev_source attribute((unused)) *ev,
1245 pid_t attribute((unused)) pid,
1247 const struct rusage attribute((unused)) *rusage,
1249 struct stats_details *const d = u;
1253 error(0, "disorder-stats %s", wstat(status));
1258 static int stats_read(ev_source attribute((unused)) *ev,
1264 struct stats_details *const d = u;
1266 dynstr_append_bytes(d->data, ptr, bytes);
1267 ev_reader_consume(reader, bytes);
1274 static int stats_error(ev_source attribute((unused)) *ev,
1277 struct stats_details *const d = u;
1279 error(errno_value, "error reading from pipe to disorder-stats");
1285 void trackdb_stats_subprocess(ev_source *ev,
1286 void (*done)(char *data, void *u),
1290 struct stats_details *d = xmalloc(sizeof *d);
1292 dynstr_init(d->data);
1296 pid = subprogram(ev, "disorder-stats", p[1]);
1298 ev_child(ev, pid, 0, stats_finished, d);
1299 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1302 /* set a pref (remove if value=0) */
1303 int trackdb_set(const char *track,
1305 const char *value) {
1306 struct kvp *t, *p, *a;
1309 char *oldalias, *newalias, **oldtags = 0, **newtags;
1312 /* TODO: if value matches default then set value=0 */
1316 tid = trackdb_begin_transaction();
1317 if((err = gettrackdata(track, &t, &p, 0,
1318 0, tid)) == DB_LOCK_DEADLOCK)
1320 if(err == DB_NOTFOUND) break;
1321 if(name[0] == '_') {
1322 if(kvp_set(&t, name, value))
1323 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1326 /* get the old alias name */
1327 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1328 /* get the old tags */
1329 if(!strcmp(name, "tags"))
1330 oldtags = parsetags(kvp_get(p, "tags"));
1332 if(kvp_set(&p, name, value))
1333 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1335 /* compute the new alias name */
1336 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1337 /* check whether alias has changed */
1338 if(!(oldalias == newalias
1339 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1340 /* adjust alias records to fit change */
1342 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1345 kvp_set(&a, "_alias_for", track);
1346 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1349 /* check whether tags have changed */
1350 if(!strcmp(name, "tags")) {
1351 newtags = parsetags(value);
1352 while(*oldtags || *newtags) {
1353 if(*oldtags && *newtags) {
1354 cmp = strcmp(*oldtags, *newtags);
1356 /* keeping this tag */
1360 /* old tag fits into a gap in the new list, so delete old */
1363 /* new tag fits into a gap in the old list, so insert new */
1365 } else if(*oldtags) {
1366 /* we've run out of new tags, so remaining old ones are to be
1369 if(trackdb_delkeydata(trackdb_tagsdb,
1370 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1374 /* we've run out of old tags, so remainig new ones are to be
1377 if(register_tag(track, *newtags, tid)) goto fail;
1387 trackdb_abort_transaction(tid);
1389 trackdb_commit_transaction(tid);
1390 return err == 0 ? 0 : -1;
1394 const char *trackdb_get(const char *track,
1396 return kvp_get(trackdb_get_all(track), name);
1399 /* get all prefs as a 0-terminated array */
1400 struct kvp *trackdb_get_all(const char *track) {
1401 struct kvp *t, *p, **pp;
1405 tid = trackdb_begin_transaction();
1406 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1410 trackdb_abort_transaction(tid);
1412 trackdb_commit_transaction(tid);
1413 for(pp = &p; *pp; pp = &(*pp)->next)
1420 const char *trackdb_resolve(const char *track) {
1425 tid = trackdb_begin_transaction();
1426 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1430 trackdb_abort_transaction(tid);
1432 trackdb_commit_transaction(tid);
1436 int trackdb_isalias(const char *track) {
1437 const char *actual = trackdb_resolve(track);
1439 return strcmp(actual, track);
1442 /* test whether a track exists (perhaps an alias) */
1443 int trackdb_exists(const char *track) {
1448 tid = trackdb_begin_transaction();
1449 /* unusually, here we want the return value */
1450 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1454 trackdb_abort_transaction(tid);
1456 trackdb_commit_transaction(tid);
1460 /* return the list of tags */
1461 char **trackdb_alltags(void) {
1467 tid = trackdb_begin_transaction();
1468 err = trackdb_alltags_tid(tid, &taglist);
1470 trackdb_abort_transaction(tid);
1472 trackdb_commit_transaction(tid);
1476 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1483 c = trackdb_opencursor(trackdb_tagsdb, tid);
1484 memset(&k, 0, sizeof k);
1485 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1486 vector_append(&v, xstrndup(k.data, k.size));
1490 case DB_LOCK_DEADLOCK:
1493 fatal(0, "c->c_get: %s", db_strerror(err));
1495 if((err = trackdb_closecursor(c))) return err;
1496 vector_terminate(&v);
1501 /* return 1 iff sorted tag lists A and B have at least one member in common */
1502 static int tag_intersection(char **a, char **b) {
1505 /* Same sort of logic as trackdb_set() above */
1507 if(!(cmp = strcmp(*a, *b))) return 1;
1508 else if(cmp < 0) ++a;
1514 /* Check whether a track is suitable for random play. Returns 0 if it is,
1515 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1517 static int check_suitable(const char *track,
1519 char **required_tags,
1520 char **prohibited_tags) {
1524 const char *pick_at_random, *played_time;
1526 /* don't pick tracks that aren't in any surviving collection (for instance
1527 * you've edited the config but the rescan hasn't done its job yet) */
1528 if(!find_track_root(track)) {
1529 info("found track not in any collection: %s", track);
1532 /* don't pick aliases - only pick the canonical form */
1533 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1534 return DB_LOCK_DEADLOCK;
1535 if(kvp_get(t, "_alias_for"))
1537 /* check that random play is not suppressed for this track */
1538 if((pick_at_random = kvp_get(p, "pick_at_random"))
1539 && !strcmp(pick_at_random, "0"))
1541 /* don't pick a track that's been played in the last 8 hours */
1542 if((played_time = kvp_get(p, "played_time"))) {
1543 last = atoll(played_time);
1545 if(now < last + 8 * 3600) /* TODO configurable */
1548 track_tags = parsetags(kvp_get(p, "tags"));
1549 /* check that no prohibited tag is present for this track */
1550 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1552 /* check that at least one required tags is present for this track */
1553 if(*required_tags && !tag_intersection(track_tags, required_tags))
1558 /* attempt to pick a random non-alias track */
1559 const char *trackdb_random(int tries) {
1564 const char *track, *candidate;
1567 char **required_tags, **prohibited_tags, **tp;
1572 tid = trackdb_begin_transaction();
1573 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1575 required_tags = parsetags(tags);
1576 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1578 prohibited_tags = parsetags(tags);
1580 if(*required_tags) {
1581 /* Bung all the suitable tracks into a hash and convert to a list of keys
1582 * (to eliminate duplicates). We cache this list since it is possible
1583 * that it will be very large. */
1586 for(tp = required_tags; *tp; ++tp) {
1587 c = trackdb_opencursor(trackdb_tagsdb, tid);
1588 memset(&key, 0, sizeof key);
1590 key.size = strlen(*tp);
1592 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1594 hash_add(h, xstrndup(data.data, data.size), 0,
1595 HASH_INSERT_OR_REPLACE);
1597 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1603 case DB_LOCK_DEADLOCK:
1606 fatal(0, "error querying tags.db: %s", db_strerror(err));
1608 trackdb_closecursor(c);
1611 error(0, "required tag %s does not match any tracks", *tp);
1613 nreqtracks = hash_count(h);
1614 reqtracks = hash_keys(h);
1616 while(nreqtracks && !track && tries-- > 0) {
1617 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1618 candidate = reqtracks[r];
1619 switch(check_suitable(candidate, tid,
1620 required_tags, prohibited_tags)) {
1626 case DB_LOCK_DEADLOCK:
1631 /* No required tags. We pick random record numbers in the database
1633 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1636 case DB_LOCK_DEADLOCK:
1637 error(0, "error querying tracks.db: %s", db_strerror(err));
1640 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1643 error(0, "cannot pick tracks at random from an empty database");
1644 while(sp->bt_nkeys && !track && tries-- > 0) {
1645 /* record numbers count from 1 upwards */
1646 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1647 memset(&key, sizeof key, 0);
1648 key.flags = DB_DBT_MALLOC;
1649 key.size = sizeof r;
1651 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1655 case DB_LOCK_DEADLOCK:
1656 error(0, "error querying tracks.db: %s", db_strerror(err));
1659 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1661 candidate = xstrndup(key.data, key.size);
1662 switch(check_suitable(candidate, tid,
1663 required_tags, prohibited_tags)) {
1669 case DB_LOCK_DEADLOCK:
1676 trackdb_closecursor(c);
1678 trackdb_abort_transaction(tid);
1680 trackdb_commit_transaction(tid);
1682 error(0, "could not pick a random track");
1686 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1687 * from the prefs. */
1688 static const char *getpart(const char *track,
1689 const char *context,
1691 const struct kvp *p,
1696 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1697 if((result = kvp_get(p, pref)))
1700 result = trackname_part(track, context, part);
1701 assert(result != 0);
1705 /* get a track name part, like trackname_part(), but taking the database into
1707 const char *trackdb_getpart(const char *track,
1708 const char *context,
1716 /* construct the full pref */
1717 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1719 tid = trackdb_begin_transaction();
1720 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1724 trackdb_abort_transaction(tid);
1726 trackdb_commit_transaction(tid);
1727 return getpart(actual, context, part, p, &used_db);
1730 /* get the raw path name for @track@ (might be an alias) */
1731 const char *trackdb_rawpath(const char *track) {
1737 tid = trackdb_begin_transaction();
1738 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1742 trackdb_abort_transaction(tid);
1744 trackdb_commit_transaction(tid);
1745 if(!(path = kvp_get(t, "_path"))) path = track;
1749 /* trackdb_list **************************************************************/
1751 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1752 * readable at some point */
1754 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1755 * If RE is a null pointer then it matches everything. */
1756 static int track_matches(size_t dl, const char *track, size_t tl,
1764 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1765 case PCRE_ERROR_NOMATCH: return 0;
1768 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1775 static int do_list(struct vector *v, const char *dir,
1776 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1782 size_t l, last_dir_len = 0;
1783 char *last_dir = 0, *track, *alias;
1787 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1790 /* find the first key >= dir */
1791 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1792 /* keep going while we're dealing with <dir/anything> */
1795 && ((char *)k.data)[dl] == '/'
1796 && !memcmp(k.data, dir, dl)) {
1797 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1799 /* we have <dir/component/anything>, so <dir/component> is a directory */
1800 l = ptr - (char *)k.data;
1801 if(what & trackdb_directories)
1803 && l == last_dir_len
1804 && !memcmp(last_dir, k.data, l))) {
1805 last_dir = xstrndup(k.data, last_dir_len = l);
1806 if(track_matches(dl, k.data, l, re))
1807 vector_append(v, last_dir);
1810 /* found a plain file */
1811 if((what & trackdb_files)) {
1812 track = xstrndup(k.data, k.size);
1813 if((err = trackdb_getdata(trackdb_prefsdb,
1814 track, &p, tid)) == DB_LOCK_DEADLOCK)
1816 /* if this file has an alias in the same directory then we skip it */
1817 if((err = compute_alias(&alias, track, p, tid)))
1819 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1820 if(track_matches(dl, k.data, k.size, re))
1821 vector_append(v, track);
1824 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1832 case DB_LOCK_DEADLOCK:
1833 error(0, "error querying database: %s", db_strerror(err));
1836 fatal(0, "error querying database: %s", db_strerror(err));
1839 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1843 /* return the directories or files below @dir@ */
1844 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1852 tid = trackdb_begin_transaction();
1855 if(do_list(&v, dir, what, re, tid))
1858 for(n = 0; n < config->collection.n; ++n)
1859 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1864 trackdb_abort_transaction(tid);
1866 trackdb_commit_transaction(tid);
1867 vector_terminate(&v);
1873 /* If S is tag:something, return something. Else return 0. */
1874 static const char *checktag(const char *s) {
1875 if(!strncmp(s, "tag:", 4))
1881 /* return a list of tracks containing all of the words given. If you
1882 * ask for only stopwords you get no tracks. */
1883 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1884 const char **w, *best = 0, *tag;
1885 char **twords, **tags;
1886 int i, j, n, err, what;
1896 *ntracks = 0; /* for early returns */
1897 /* normalize all the words */
1898 w = xmalloc(nwordlist * sizeof (char *));
1899 for(n = 0; n < nwordlist; ++n) {
1903 w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0);
1904 if(checktag(w[n])) {
1905 ++ntags; /* count up tags */
1906 /* Normalize the tag */
1907 w[n] = normalize_tag(w[n], strlen(w[n]));
1909 /* Normalize the search term by removing combining characters */
1910 if(!(w32 = utf8_to_utf32(w[n], strlen(w[n]), &nw32)))
1912 nw32 = remove_combining_chars(w32, nw32);
1913 if(!(w[n] = utf32_to_utf8(w32, nw32, 0)))
1917 /* find the longest non-stopword */
1918 for(n = 0; n < nwordlist; ++n)
1919 if(!stopword(w[n]) && !checktag(w[n]))
1920 if(!best || strlen(w[n]) > strlen(best))
1922 /* TODO: we should at least in principal be able to identify the word or tag
1923 * with the least matches in log time, and choose that as our primary search
1925 if(ntags && !best) {
1926 /* Only tags are listed. We limit to the first and narrow down with the
1928 best = checktag(w[0]);
1929 db = trackdb_tagsdb;
1932 /* We can limit to some word. */
1933 db = trackdb_searchdb;
1936 /* Only stopwords */
1942 tid = trackdb_begin_transaction();
1943 /* find all the tracks that have that word */
1948 cursor = trackdb_opencursor(db, tid);
1949 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1950 vector_append(&v, xstrndup(d.data, d.size));
1957 case DB_LOCK_DEADLOCK:
1958 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1961 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1963 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1965 /* do a naive search over that (hopefuly fairly small) list of tracks */
1967 for(n = 0; n < v.nvec; ++n) {
1968 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1971 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1974 twords = track_to_words(v.vec[n], p);
1975 tags = parsetags(kvp_get(p, "tags"));
1976 for(i = 0; i < nwordlist; ++i) {
1977 if((tag = checktag(w[i]))) {
1978 /* Track must have this tag */
1979 for(j = 0; tags[j]; ++j)
1980 if(!strcmp(tag, tags[j])) break; /* tag found */
1981 if(!tags[j]) break; /* tag not found */
1983 /* Track must contain this word */
1984 for(j = 0; twords[j]; ++j)
1985 if(!strcmp(w[i], twords[j])) break; /* word found */
1986 if(!twords[j]) break; /* word not found */
1989 if(i >= nwordlist) /* all words found */
1990 vector_append(&u, v.vec[n]);
1994 trackdb_closecursor(cursor);
1996 trackdb_abort_transaction(tid);
1997 info("retrying search");
1999 trackdb_commit_transaction(tid);
2000 vector_terminate(&u);
2006 /* trackdb_scan **************************************************************/
2008 int trackdb_scan(const char *root,
2009 int (*callback)(const char *track,
2017 const size_t root_len = root ? strlen(root) : 0;
2022 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
2024 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
2027 memset(&k, 0, sizeof k);
2028 err = cursor->c_get(cursor, &k, prepare_data(&d),
2033 || (k.size > root_len
2034 && !strncmp(k.data, root, root_len)
2035 && ((char *)k.data)[root_len] == '/')) {
2036 data = kvp_urldecode(d.data, d.size);
2037 if(kvp_get(data, "_path")) {
2038 track = xstrndup(k.data, k.size);
2039 /* Advance to the next track before the callback so that the callback
2040 * may safely delete the track */
2041 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
2042 if((cberr = callback(track, data, u, tid))) {
2047 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
2051 trackdb_closecursor(cursor);
2058 case DB_LOCK_DEADLOCK:
2059 error(0, "c->c_get: %s", db_strerror(err));
2062 fatal(0, "c->c_get: %s", db_strerror(err));
2066 /* trackdb_rescan ************************************************************/
2068 /* called when the rescanner terminates */
2069 static int reap_rescan(ev_source attribute((unused)) *ev,
2072 const struct rusage attribute((unused)) *rusage,
2073 void attribute((unused)) *u) {
2074 if(pid == rescan_pid) rescan_pid = -1;
2076 error(0, RESCAN": %s", wstat(status));
2078 D((RESCAN" terminated: %s", wstat(status)));
2079 /* Our cache of file lookups is out of date now */
2080 cache_clean(&cache_files_type);
2081 eventlog("rescanned", (char *)0);
2085 void trackdb_rescan(ev_source *ev) {
2088 if(rescan_pid != -1) {
2089 error(0, "rescan already underway");
2092 rescan_pid = subprogram(ev, RESCAN, -1);
2094 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
2095 D(("started rescanner"));
2097 /* This is the first rescan, we block until it is complete */
2098 while(waitpid(rescan_pid, &w, 0) < 0 && errno == EINTR)
2100 reap_rescan(0, rescan_pid, w, 0, 0);
2104 int trackdb_rescan_cancel(void) {
2105 if(rescan_pid == -1) return 0;
2106 if(kill(rescan_pid, SIGTERM) < 0)
2107 fatal(errno, "error killing rescanner");
2112 /* global prefs **************************************************************/
2114 void trackdb_set_global(const char *name,
2122 tid = trackdb_begin_transaction();
2123 if(!(err = trackdb_set_global_tid(name, value, tid)))
2125 trackdb_abort_transaction(tid);
2127 trackdb_commit_transaction(tid);
2128 /* log important state changes */
2129 if(!strcmp(name, "playing")) {
2130 state = !value || !strcmp(value, "yes");
2131 info("playing %s by %s",
2132 state ? "enabled" : "disabled",
2134 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
2136 if(!strcmp(name, "random-play")) {
2137 state = !value || !strcmp(value, "yes");
2138 info("random play %s by %s",
2139 state ? "enabled" : "disabled",
2141 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
2143 if(!strcmp(name, "required-tags"))
2147 int trackdb_set_global_tid(const char *name,
2153 memset(&k, 0, sizeof k);
2154 memset(&d, 0, sizeof d);
2155 k.data = (void *)name;
2156 k.size = strlen(name);
2158 d.data = (void *)value;
2159 d.size = strlen(value);
2162 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
2164 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
2165 if(err == DB_LOCK_DEADLOCK) return err;
2167 fatal(0, "error updating database: %s", db_strerror(err));
2171 const char *trackdb_get_global(const char *name) {
2177 tid = trackdb_begin_transaction();
2178 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2180 trackdb_abort_transaction(tid);
2182 trackdb_commit_transaction(tid);
2186 int trackdb_get_global_tid(const char *name,
2192 memset(&k, 0, sizeof k);
2193 k.data = (void *)name;
2194 k.size = strlen(name);
2195 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2196 prepare_data(&d), 0)) {
2198 *rp = xstrndup(d.data, d.size);
2203 case DB_LOCK_DEADLOCK:
2206 fatal(0, "error reading database: %s", db_strerror(err));
2210 /** @brief Retrieve the most recently added tracks
2211 * @param ntracksp Where to put count, or 0
2212 * @param maxtracks Maximum number of tracks to retrieve
2213 * @return null-terminated array of track names
2215 * The most recently added track is first in the array.
2217 char **trackdb_new(int *ntracksp,
2223 tid = trackdb_begin_transaction();
2224 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2227 trackdb_abort_transaction(tid);
2229 trackdb_commit_transaction(tid);
2233 /** @brief Retrieve the most recently added tracks
2234 * @param ntracksp Where to put count, or 0
2235 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2236 * @param tid Transaction ID
2237 * @return null-terminated array of track names, or NULL on deadlock
2239 * The most recently added track is first in the array.
2241 static char **trackdb_new_tid(int *ntracksp,
2247 struct vector tracks[1];
2249 vector_init(tracks);
2250 c = trackdb_opencursor(trackdb_noticeddb, tid);
2251 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2252 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2253 vector_append(tracks, xstrndup(d.data, d.size));
2255 case 0: /* hit maxtracks */
2256 case DB_NOTFOUND: /* ran out of tracks */
2258 case DB_LOCK_DEADLOCK:
2259 trackdb_closecursor(c);
2262 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2264 if((err = trackdb_closecursor(c)))
2265 return 0; /* deadlock */
2266 vector_terminate(tracks);
2268 *ntracksp = tracks->nvec;
2272 /** @brief Expire noticed.db
2273 * @param earliest Earliest timestamp to keep
2275 void trackdb_expire_noticed(time_t earliest) {
2279 tid = trackdb_begin_transaction();
2280 if(!trackdb_expire_noticed_tid(earliest, tid))
2282 trackdb_abort_transaction(tid);
2284 trackdb_commit_transaction(tid);
2287 /** @brief Expire noticed.db
2288 * @param earliest Earliest timestamp to keep
2289 * @param tid Transaction ID
2290 * @return 0 or DB_LOCK_DEADLOCK
2292 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2300 c = trackdb_opencursor(trackdb_noticeddb, tid);
2301 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2303 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2304 if(when >= earliest)
2306 if((err = c->c_del(c, 0))) {
2307 if(err != DB_LOCK_DEADLOCK)
2308 fatal(0, "error deleting expired noticed.db entry: %s",
2314 if(err == DB_NOTFOUND)
2316 if(err && err != DB_LOCK_DEADLOCK)
2317 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2319 if((err = trackdb_closecursor(c))) {
2320 if(err != DB_LOCK_DEADLOCK)
2321 fatal(0, "error closing cursor: %s", db_strerror(err));
2325 info("expired %d tracks from noticed.db", count);
2329 /* tidying up ****************************************************************/
2331 void trackdb_gc(void) {
2335 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2336 config->checkpoint_kbyte,
2337 config->checkpoint_min,
2339 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2340 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2341 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2342 /* This makes catastrophic recovery impossible. However, the user can still
2343 * preserve the important data by using disorder-dump to snapshot their
2344 * prefs, and later to restore it. This is likely to have much small
2345 * long-term storage requirements than record the db logfiles. */
2353 indent-tabs-mode:nil