2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
49 #include "trackname.h"
50 #include "trackdb-int.h"
58 #define RESCAN "disorder-rescan"
59 #define DEADLOCK "disorder-deadlock"
61 static const char *getpart(const char *track
,
66 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
);
67 static char **trackdb_new_tid(int *ntracksp
,
70 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
72 const struct cache_type cache_files_type
= { 86400 };
73 unsigned long cache_files_hits
, cache_files_misses
;
75 /* setup and teardown ********************************************************/
77 static const char *home
; /* home had better not change */
78 DB_ENV
*trackdb_env
; /* db environment */
80 /** @brief The tracks database
81 * - Keys are UTF-8(NFC(unicode(path name)))
82 * - Values are encoded key-value pairs
83 * - Data is reconstructable data about tracks that currently exist
87 /** @brief The preferences database
89 * - Keys are UTF-8(NFC(unicode(path name)))
90 * - Values are encoded key-value pairs
91 * - Data is user data about tracks (that might not exist any more)
92 * and cannot be reconstructed
96 /** @brief The search database
98 * - Keys are UTF-8(NFKC(casefold(search term)))
99 * - Values are UTF-8(NFC(unicode(path name)))
100 * - There can be more than one value per key
101 * - Presence of key,value means that path matches the search terms
102 * - Only tracks fond in @ref tracks_tracksdb are represented here
103 * - This database can be reconstructed, it contains no user data
105 DB
*trackdb_searchdb
;
107 /** @brief The tags database
109 * - Keys are UTF-8(NFKC(casefold(tag)))
110 * - Values are UTF-8(NFC(unicode(path name)))
111 * - There can be more than one value per key
112 * - Presence of key,value means that path matches the tag
113 * - This is always in sync with the tags preference
114 * - This database can be reconstructed, it contains no user data
116 DB
*trackdb_tagsdb
; /* the tags database */
118 /** @brief The global preferences database
119 * - Keys are UTF-8(NFC(preference))
120 * - Values are global preference values
121 * - Data is user data and cannot be reconstructed
123 DB
*trackdb_globaldb
; /* global preferences */
125 /** @brief The noticed database
126 * - Keys are 64-bit big-endian timestamps
127 * - Values are UTF-8(NFC(unicode(path name)))
128 * - There can be more than one value per key
129 * - Presence of key,value means that path was added at the given time
130 * - Data cannot be reconstructed (but isn't THAT important)
132 DB
*trackdb_noticeddb
; /* when track noticed */
133 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
134 static pid_t rescan_pid
= -1; /* rescanner PID */
135 static int initialized
, opened
; /* state */
137 /* tracks matched by required_tags */
138 static char **reqtracks
;
139 static size_t nreqtracks
;
141 /* comparison function for keys */
142 static int compare(DB
attribute((unused
)) *db_
,
143 const DBT
*a
, const DBT
*b
) {
144 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
147 /* open environment */
148 void trackdb_init(int recover
) {
150 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
153 assert(initialized
== 0);
156 if(strcmp(home
, config
->home
))
157 fatal(0, "cannot change db home without server restart");
161 /* create environment */
162 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
164 if((err
= trackdb_env
->set_alloc(trackdb_env
,
165 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
166 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
167 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
168 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
169 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
170 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
171 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
177 |recover_type
[recover
],
179 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
180 trackdb_env
->set_errpfx(trackdb_env
, "DB");
181 trackdb_env
->set_errfile(trackdb_env
, stderr
);
182 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
183 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
184 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
185 D(("initialized database environment"));
188 /* called when deadlock manager terminates */
189 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
190 pid_t
attribute((unused
)) pid
,
192 const struct rusage
attribute((unused
)) *rusage
,
193 void attribute((unused
)) *u
) {
194 db_deadlock_pid
= -1;
196 fatal(0, "deadlock manager unexpectedly terminated: %s",
199 D(("deadlock manager terminated: %s", wstat(status
)));
203 static pid_t
subprogram(ev_source
*ev
, const char *prog
,
207 /* If we're in the background then trap subprocess stdout/stderr */
208 if(!(pid
= xfork())) {
210 ev_signal_atfork(ev
);
211 signal(SIGPIPE
, SIG_DFL
);
216 /* If we were negatively niced, undo it. We don't bother checking for
217 * error, it's not that important. */
218 setpriority(PRIO_PROCESS
, 0, 0);
219 execlp(prog
, prog
, "--config", configfile
,
220 debugging ?
"--debug" : "--no-debug",
221 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
223 fatal(errno
, "error invoking %s", prog
);
228 /* start deadlock manager */
229 void trackdb_master(ev_source
*ev
) {
230 assert(db_deadlock_pid
== -1);
231 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
232 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
233 D(("started deadlock manager"));
236 /* close environment */
237 void trackdb_deinit(void) {
241 assert(initialized
== 1);
244 /* close the environment */
245 if((err
= trackdb_env
->close(trackdb_env
, 0)))
246 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
248 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
249 fatal(errno
, "error killing rescanner");
251 /* terminate the deadlock manager */
252 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
253 fatal(errno
, "error killing deadlock manager");
254 db_deadlock_pid
= -1;
256 D(("deinitialized database environment"));
259 /* open a specific database */
260 static DB
*open_db(const char *path
,
268 D(("open %s", path
));
269 path
= config_get_file(path
);
270 if((err
= db_create(&db
, trackdb_env
, 0)))
271 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
273 if((err
= db
->set_flags(db
, dbflags
)))
274 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
275 if(dbtype
== DB_BTREE
)
276 if((err
= db
->set_bt_compare(db
, compare
)))
277 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
278 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
279 openflags
| DB_AUTO_COMMIT
, mode
))) {
280 if((openflags
& DB_CREATE
) || errno
!= ENOENT
)
281 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
288 /* open track databases */
289 void trackdb_open(void) {
295 /* check the database version first */
296 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, 0, 0666);
297 if(trackdb_globaldb
) {
298 /* This is an existing database */
302 s
= trackdb_get_global("_dbversion");
303 oldversion
= s ?
atol(s
) : 1;
304 if(oldversion
!= config
->dbversion
) {
305 /* This database needs upgrading. This isn't implemented yet so we just
307 fatal(0, "database needs upgrading from %ld to %ld",
308 oldversion
, config
->dbversion
);
311 /* Close the database again, we'll open it property below */
312 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
313 fatal(0, "error closing global.db: %s", db_strerror(err
));
314 trackdb_globaldb
= 0;
316 /* This is a brand new database */
319 /* open the databases */
320 trackdb_tracksdb
= open_db("tracks.db",
321 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
322 trackdb_searchdb
= open_db("search.db",
323 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
324 trackdb_tagsdb
= open_db("tags.db",
325 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
326 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
327 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
328 trackdb_noticeddb
= open_db("noticed.db",
329 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
330 /* Stash the database version */
334 snprintf(buf
, sizeof buf
, "%ld", config
->dbversion
);
335 trackdb_set_global("_dbversion", buf
, 0);
337 D(("opened databases"));
340 /* close track databases */
341 void trackdb_close(void) {
347 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
348 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
349 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
350 fatal(0, "error closing search.db: %s", db_strerror(err
));
351 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
352 fatal(0, "error closing tags.db: %s", db_strerror(err
));
353 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
354 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
355 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
356 fatal(0, "error closing global.db: %s", db_strerror(err
));
357 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
358 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
359 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
360 trackdb_tagsdb
= trackdb_globaldb
= 0;
361 D(("closed databases"));
364 /* generic db routines *******************************************************/
366 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
367 * DB_LOCK_DEADLOCK. */
368 int trackdb_getdata(DB
*db
,
375 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
376 prepare_data(&data
), 0)) {
378 *kp
= kvp_urldecode(data
.data
, data
.size
);
383 case DB_LOCK_DEADLOCK
:
384 error(0, "error querying database: %s", db_strerror(err
));
387 fatal(0, "error querying database: %s", db_strerror(err
));
391 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
392 * DB_LOCK_DEADLOCK. */
393 int trackdb_putdata(DB
*db
,
401 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
402 encode_data(&data
, k
), flags
)) {
406 case DB_LOCK_DEADLOCK
:
407 error(0, "error updating database: %s", db_strerror(err
));
410 fatal(0, "error updating database: %s", db_strerror(err
));
414 /* delete a database entry */
415 int trackdb_delkey(DB
*db
,
421 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
425 case DB_LOCK_DEADLOCK
:
426 error(0, "error updating database: %s", db_strerror(err
));
429 fatal(0, "error updating database: %s", db_strerror(err
));
433 /* open a database cursor */
434 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
438 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
440 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
445 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
446 int trackdb_closecursor(DBC
*c
) {
450 switch(err
= c
->c_close(c
)) {
453 case DB_LOCK_DEADLOCK
:
454 error(0, "error closing cursor: %s", db_strerror(err
));
457 fatal(0, "error closing cursor: %s", db_strerror(err
));
461 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
462 int trackdb_delkeydata(DB
*db
,
470 c
= trackdb_opencursor(db
, tid
);
471 switch(err
= c
->c_get(c
, make_key(&key
, word
),
472 make_key(&data
, track
), DB_GET_BOTH
)) {
474 switch(err
= c
->c_del(c
, 0)) {
480 case DB_LOCK_DEADLOCK
:
481 error(0, "error updating database: %s", db_strerror(err
));
484 fatal(0, "c->c_del: %s", db_strerror(err
));
489 case DB_LOCK_DEADLOCK
:
490 error(0, "error updating database: %s", db_strerror(err
));
493 fatal(0, "c->c_get: %s", db_strerror(err
));
495 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
499 /* start a transaction */
500 DB_TXN
*trackdb_begin_transaction(void) {
504 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
505 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
509 /* abort transaction */
510 void trackdb_abort_transaction(DB_TXN
*tid
) {
514 if((err
= tid
->abort(tid
)))
515 fatal(0, "tid->abort: %s", db_strerror(err
));
518 /* commit transaction */
519 void trackdb_commit_transaction(DB_TXN
*tid
) {
522 if((err
= tid
->commit(tid
, 0)))
523 fatal(0, "tid->commit: %s", db_strerror(err
));
526 /* search/tags shared code ***************************************************/
528 /* comparison function used by dedupe() */
529 static int wordcmp(const void *a
, const void *b
) {
530 return strcmp(*(const char **)a
, *(const char **)b
);
533 /* sort and de-dupe VEC */
534 static char **dedupe(char **vec
, int nvec
) {
537 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
541 for(n
= 1; n
< nvec
; ++n
)
542 if(strcmp(vec
[n
], vec
[m
- 1]))
549 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
550 static int register_word(DB
*db
, const char *what
,
551 const char *track
, const char *word
,
556 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
557 make_key(&data
, track
), DB_NODUPDATA
)) {
561 case DB_LOCK_DEADLOCK
:
562 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
565 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
569 /* search primitives *********************************************************/
571 /* return true iff NAME is a trackname_display_ pref */
572 static int is_display_pref(const char *name
) {
573 static const char prefix
[] = "trackname_display_";
574 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
577 /** @brief Word_Break property tailor that treats underscores as spaces */
578 static int tailor_underscore_Word_Break_Other(uint32_t c
) {
582 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
583 return unicode_Word_Break_Other
;
587 /** @brief Normalize and split a string using a given tailoring */
588 static void word_split(struct vector
*v
,
590 unicode_property_tailor
*pt
) {
592 uint32_t *t32
, **w32
;
594 /* Convert to UTF-32 */
595 if(!(t32
= utf8_to_utf32(s
, strlen(s
), &nt32
)))
597 /* Erase case distinctions */
598 if(!(t32
= utf32_casefold_compat(t32
, nt32
, &nt32
)))
600 /* Split into words, treating _ as a space */
601 w32
= utf32_word_split(t32
, nt32
, &nw
, pt
);
602 /* Convert words back to UTF-8 and append to result */
603 for(i
= 0; i
< nw
; ++i
)
604 vector_append(v
, utf32_to_utf8(w32
[i
], utf32_len(w32
[i
]), 0));
607 /* compute the words of a track name */
608 static char **track_to_words(const char *track
,
609 const struct kvp
*p
) {
611 const char *rootless
= track_rootless(track
);
614 rootless
= track
; /* bodge */
616 rootless
= strip_extension(rootless
);
617 word_split(&v
, strip_extension(rootless
), tailor_underscore_Word_Break_Other
);
618 for(; p
; p
= p
->next
)
619 if(is_display_pref(p
->name
))
620 word_split(&v
, p
->value
, 0);
621 vector_terminate(&v
);
622 return dedupe(v
.vec
, v
.nvec
);
625 /* return nonzero iff WORD is a stopword */
626 static int stopword(const char *word
) {
629 for(n
= 0; n
< config
->stopword
.n
630 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
632 return n
< config
->stopword
.n
;
635 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
636 static int register_search_word(const char *track
, const char *word
,
638 if(stopword(word
)) return 0;
639 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
642 /* Tags **********************************************************************/
644 /* Return nonzero if C is a valid tag character */
645 static int tagchar(int c
) {
654 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
655 static char **parsetags(const char *s
) {
661 /* skip initial separators */
662 while(*s
&& (!tagchar(*s
) || *s
== ' '))
665 /* find the extent of the tag */
667 while(*s
&& tagchar(*s
))
669 /* strip trailing spaces */
670 while(s
> t
&& s
[-1] == ' ')
672 vector_append(&v
, xstrndup(t
, s
- t
));
673 /* skip intermediate and trailing separators */
674 while(*s
&& (!tagchar(*s
) || *s
== ' '))
678 vector_terminate(&v
);
679 return dedupe(v
.vec
, v
.nvec
);
682 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
683 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
684 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
687 /* aliases *******************************************************************/
689 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
690 * there is no alias sets *aliasp to 0. */
691 static int compute_alias(char **aliasp
,
696 const char *s
= config
->alias
, *t
, *expansion
, *part
;
697 int c
, used_db
= 0, slash_prefix
, err
;
699 const char *const root
= find_track_root(track
);
702 /* Bodge for tracks with no root */
707 dynstr_append_string(&d
, root
);
708 while((c
= (unsigned char)*s
++)) {
710 dynstr_append(&d
, c
);
713 if((slash_prefix
= (*s
== '/')))
716 assert(t
!= 0); /* validated at startup */
717 part
= xstrndup(s
, t
- s
);
718 expansion
= getpart(track
, "display", part
, p
, &used_db
);
720 if(slash_prefix
) dynstr_append(&d
, '/');
721 dynstr_append_string(&d
, expansion
);
723 s
= t
+ 1; /* skip {part} */
725 /* only admit to the alias if we used the db... */
730 dynstr_terminate(&d
);
731 /* ...and the answer differs from the original... */
732 if(!strcmp(track
, d
.vec
)) {
736 /* ...and there isn't already a different track with that name (including as
738 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
740 if((s
= kvp_get(at
, "_alias_for"))
741 && !strcmp(s
, track
)) {
753 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
754 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
755 * Always sets the return values, even if only to null pointers. */
756 static int gettrackdata(const char *track
,
759 const char **actualp
,
761 #define GTD_NOALIAS 0x0001
764 const char *actual
= track
;
765 struct kvp
*t
= 0, *p
= 0;
767 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
768 if((actual
= kvp_get(t
, "_alias_for"))) {
769 if(flags
& GTD_NOALIAS
) {
770 error(0, "alias passed to gettrackdata where real path required");
773 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
778 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
783 if(actualp
) *actualp
= actual
;
789 /* trackdb_notice() **********************************************************/
791 /** @brief notice a possibly new track
792 * @return @c DB_NOTFOUND if new, 0 if already known
794 int trackdb_notice(const char *track
,
800 tid
= trackdb_begin_transaction();
801 err
= trackdb_notice_tid(track
, path
, tid
);
802 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
805 trackdb_abort_transaction(tid
);
807 trackdb_commit_transaction(tid
);
811 /** @brief notice a possibly new track
812 * @param track NFC UTF-8 track name
813 * @param path Raw path name
814 * @param tid Transaction ID
815 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
817 int trackdb_notice_tid(const char *track
,
821 struct kvp
*t
, *a
, *p
;
825 /* notice whether the tracks.db entry changes */
827 /* get any existing tracks entry */
828 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
830 ret
= err
; /* 0 or DB_NOTFOUND */
831 /* this is a real track */
832 t_changed
+= kvp_set(&t
, "_alias_for", 0);
833 t_changed
+= kvp_set(&t
, "_path", path
);
834 /* if we have an alias record it in the database */
835 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
837 /* won't overwrite someone else's alias as compute_alias() checks */
838 D(("%s: alias %s", track
, alias
));
840 kvp_set(&a
, "_alias_for", track
);
841 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
843 /* update search.db */
844 w
= track_to_words(track
, p
);
845 for(n
= 0; w
[n
]; ++n
)
846 if((err
= register_search_word(track
, w
[n
], tid
)))
849 w
= parsetags(kvp_get(p
, "tags"));
850 for(n
= 0; w
[n
]; ++n
)
851 if((err
= register_tag(track
, w
[n
], tid
)))
854 /* only store the tracks.db entry if it has changed */
855 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
857 if(ret
== DB_NOTFOUND
) {
858 uint32_t timestamp
[2];
863 timestamp
[0] = htonl((uint64_t)now
>> 32);
864 timestamp
[1] = htonl((uint32_t)now
);
865 memset(&key
, 0, sizeof key
);
866 key
.data
= timestamp
;
867 key
.size
= sizeof timestamp
;
868 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
869 make_key(&data
, track
), 0)) {
871 case DB_LOCK_DEADLOCK
: return err
;
872 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
878 /* trackdb_obsolete() ********************************************************/
880 /* obsolete a track */
881 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
886 if((err
= gettrackdata(track
, 0, &p
, 0,
887 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
889 else if(err
== DB_NOTFOUND
) return 0;
890 /* compute the alias, if any, and delete it */
891 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
893 /* if the alias points to some other track then compute_alias won't
895 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
898 /* update search.db */
899 w
= track_to_words(track
, p
);
900 for(n
= 0; w
[n
]; ++n
)
901 if(trackdb_delkeydata(trackdb_searchdb
,
902 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
905 w
= parsetags(kvp_get(p
, "tags"));
906 for(n
= 0; w
[n
]; ++n
)
907 if(trackdb_delkeydata(trackdb_tagsdb
,
908 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
911 /* update tracks.db */
912 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
914 /* We don't delete the prefs, so they survive temporary outages of the
915 * (possibly virtual) track filesystem */
919 /* trackdb_stats() ***********************************************************/
921 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
922 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
924 static const struct statinfo
{
927 } statinfo_hash
[] = {
943 }, statinfo_btree
[] = {
964 /* look up stats for DB */
965 static int get_stats(struct vector
*v
,
967 const struct statinfo
*si
,
976 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
979 case DB_LOCK_DEADLOCK
:
980 error(0, "error querying database: %s", db_strerror(err
));
983 fatal(0, "error querying database: %s", db_strerror(err
));
985 for(n
= 0; n
< nsi
; ++n
) {
986 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
987 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
988 vector_append(v
, str
);
994 struct search_entry
{
999 /* find the top COUNT words in the search database */
1000 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
1001 struct search_entry
*se
;
1004 int err
, n
= 0, nse
= 0, i
;
1009 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
1010 se
= xmalloc(count
* sizeof *se
);
1011 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
1013 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
1016 #define FINALIZE() do { \
1017 if(word && (nse < count || n > se[nse - 1].n)) { \
1022 while(i > 0 && n > se[i - 1].n) \
1024 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
1025 se[i].word = word; \
1030 word
= xstrndup(k
.data
, wl
= k
.size
);
1038 case DB_LOCK_DEADLOCK
:
1039 error(0, "error querying search database: %s", db_strerror(err
));
1042 fatal(0, "error querying search database: %s", db_strerror(err
));
1044 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1047 byte_xasprintf(&str
, "Top %d search words:", nse
);
1048 vector_append(v
, str
);
1049 for(i
= 0; i
< nse
; ++i
) {
1050 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
1051 vector_append(v
, str
);
1056 #define SI(what) statinfo_##what, \
1057 sizeof statinfo_##what / sizeof (struct statinfo)
1059 /* return a list of database stats */
1060 char **trackdb_stats(int *nstatsp
) {
1066 tid
= trackdb_begin_transaction();
1068 vector_append(&v
, (char *)"Tracks database stats:");
1069 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
1070 vector_append(&v
, (char *)"");
1071 vector_append(&v
, (char *)"Search database stats:");
1072 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
1073 vector_append(&v
, (char *)"");
1074 vector_append(&v
, (char *)"Prefs database stats:");
1075 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
1076 vector_append(&v
, (char *)"");
1077 if(search_league(&v
, 10, tid
)) goto fail
;
1078 vector_terminate(&v
);
1081 trackdb_abort_transaction(tid
);
1083 trackdb_commit_transaction(tid
);
1084 if(nstatsp
) *nstatsp
= v
.nvec
;
1088 struct stats_details
{
1089 void (*done
)(char *data
, void *u
);
1091 int exited
; /* subprocess exited */
1092 int closed
; /* pipe close */
1093 int wstat
; /* wait status from subprocess */
1094 struct dynstr data
[1]; /* data read from pipe */
1097 static void stats_complete(struct stats_details
*d
) {
1100 if(!(d
->exited
&& d
->closed
))
1102 byte_xasprintf(&s
, "\n"
1104 "track lookup cache hits: %lu\n"
1105 "track lookup cache misses: %lu\n",
1107 cache_files_misses
);
1108 dynstr_append_string(d
->data
, s
);
1109 dynstr_terminate(d
->data
);
1110 d
->done(d
->data
->vec
, d
->u
);
1113 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1114 pid_t
attribute((unused
)) pid
,
1116 const struct rusage
attribute((unused
)) *rusage
,
1118 struct stats_details
*const d
= u
;
1122 error(0, "disorder-stats %s", wstat(status
));
1127 static int stats_read(ev_source
attribute((unused
)) *ev
,
1133 struct stats_details
*const d
= u
;
1135 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1136 ev_reader_consume(reader
, bytes
);
1143 static int stats_error(ev_source
attribute((unused
)) *ev
,
1146 struct stats_details
*const d
= u
;
1148 error(errno_value
, "error reading from pipe to disorder-stats");
1154 void trackdb_stats_subprocess(ev_source
*ev
,
1155 void (*done
)(char *data
, void *u
),
1159 struct stats_details
*d
= xmalloc(sizeof *d
);
1161 dynstr_init(d
->data
);
1165 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1167 ev_child(ev
, pid
, 0, stats_finished
, d
);
1168 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1171 /* set a pref (remove if value=0) */
1172 int trackdb_set(const char *track
,
1174 const char *value
) {
1175 struct kvp
*t
, *p
, *a
;
1178 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1181 /* TODO: if value matches default then set value=0 */
1185 tid
= trackdb_begin_transaction();
1186 if((err
= gettrackdata(track
, &t
, &p
, 0,
1187 0, tid
)) == DB_LOCK_DEADLOCK
)
1189 if(err
== DB_NOTFOUND
) break;
1190 if(name
[0] == '_') {
1191 if(kvp_set(&t
, name
, value
))
1192 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1195 /* get the old alias name */
1196 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1197 /* get the old tags */
1198 if(!strcmp(name
, "tags"))
1199 oldtags
= parsetags(kvp_get(p
, "tags"));
1201 if(kvp_set(&p
, name
, value
))
1202 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1204 /* compute the new alias name */
1205 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1206 /* check whether alias has changed */
1207 if(!(oldalias
== newalias
1208 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1209 /* adjust alias records to fit change */
1211 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1214 kvp_set(&a
, "_alias_for", track
);
1215 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1218 /* check whether tags have changed */
1219 if(!strcmp(name
, "tags")) {
1220 newtags
= parsetags(value
);
1221 while(*oldtags
|| *newtags
) {
1222 if(*oldtags
&& *newtags
) {
1223 cmp
= strcmp(*oldtags
, *newtags
);
1225 /* keeping this tag */
1229 /* old tag fits into a gap in the new list, so delete old */
1232 /* new tag fits into a gap in the old list, so insert new */
1234 } else if(*oldtags
) {
1235 /* we've run out of new tags, so remaining old ones are to be
1238 if(trackdb_delkeydata(trackdb_tagsdb
,
1239 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1243 /* we've run out of old tags, so remainig new ones are to be
1246 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1256 trackdb_abort_transaction(tid
);
1258 trackdb_commit_transaction(tid
);
1259 return err
== 0 ?
0 : -1;
1263 const char *trackdb_get(const char *track
,
1265 return kvp_get(trackdb_get_all(track
), name
);
1268 /* get all prefs as a 0-terminated array */
1269 struct kvp
*trackdb_get_all(const char *track
) {
1270 struct kvp
*t
, *p
, **pp
;
1274 tid
= trackdb_begin_transaction();
1275 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1279 trackdb_abort_transaction(tid
);
1281 trackdb_commit_transaction(tid
);
1282 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1289 const char *trackdb_resolve(const char *track
) {
1294 tid
= trackdb_begin_transaction();
1295 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1299 trackdb_abort_transaction(tid
);
1301 trackdb_commit_transaction(tid
);
1305 int trackdb_isalias(const char *track
) {
1306 const char *actual
= trackdb_resolve(track
);
1308 return strcmp(actual
, track
);
1311 /* test whether a track exists (perhaps an alias) */
1312 int trackdb_exists(const char *track
) {
1317 tid
= trackdb_begin_transaction();
1318 /* unusually, here we want the return value */
1319 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1323 trackdb_abort_transaction(tid
);
1325 trackdb_commit_transaction(tid
);
1329 /* return the list of tags */
1330 char **trackdb_alltags(void) {
1336 tid
= trackdb_begin_transaction();
1337 err
= trackdb_alltags_tid(tid
, &taglist
);
1339 trackdb_abort_transaction(tid
);
1341 trackdb_commit_transaction(tid
);
1345 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1352 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1353 memset(&k
, 0, sizeof k
);
1354 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1355 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1359 case DB_LOCK_DEADLOCK
:
1362 fatal(0, "c->c_get: %s", db_strerror(err
));
1364 if((err
= trackdb_closecursor(c
))) return err
;
1365 vector_terminate(&v
);
1370 /* return 1 iff sorted tag lists A and B have at least one member in common */
1371 static int tag_intersection(char **a
, char **b
) {
1374 /* Same sort of logic as trackdb_set() above */
1376 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1377 else if(cmp
< 0) ++a
;
1383 /* Check whether a track is suitable for random play. Returns 0 if it is,
1384 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1386 static int check_suitable(const char *track
,
1388 char **required_tags
,
1389 char **prohibited_tags
) {
1393 const char *pick_at_random
, *played_time
;
1395 /* don't pick tracks that aren't in any surviving collection (for instance
1396 * you've edited the config but the rescan hasn't done its job yet) */
1397 if(!find_track_root(track
)) {
1398 info("found track not in any collection: %s", track
);
1401 /* don't pick aliases - only pick the canonical form */
1402 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1403 return DB_LOCK_DEADLOCK
;
1404 if(kvp_get(t
, "_alias_for"))
1406 /* check that random play is not suppressed for this track */
1407 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1408 && !strcmp(pick_at_random
, "0"))
1410 /* don't pick a track that's been played in the last 8 hours */
1411 if((played_time
= kvp_get(p
, "played_time"))) {
1412 last
= atoll(played_time
);
1414 if(now
< last
+ 8 * 3600) /* TODO configurable */
1417 track_tags
= parsetags(kvp_get(p
, "tags"));
1418 /* check that no prohibited tag is present for this track */
1419 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1421 /* check that at least one required tags is present for this track */
1422 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1427 /* attempt to pick a random non-alias track */
1428 const char *trackdb_random(int tries
) {
1433 const char *track
, *candidate
;
1436 char **required_tags
, **prohibited_tags
, **tp
;
1441 tid
= trackdb_begin_transaction();
1442 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1444 required_tags
= parsetags(tags
);
1445 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1447 prohibited_tags
= parsetags(tags
);
1449 if(*required_tags
) {
1450 /* Bung all the suitable tracks into a hash and convert to a list of keys
1451 * (to eliminate duplicates). We cache this list since it is possible
1452 * that it will be very large. */
1455 for(tp
= required_tags
; *tp
; ++tp
) {
1456 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1457 memset(&key
, 0, sizeof key
);
1459 key
.size
= strlen(*tp
);
1461 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1463 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1464 HASH_INSERT_OR_REPLACE
);
1466 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1472 case DB_LOCK_DEADLOCK
:
1475 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1477 trackdb_closecursor(c
);
1480 error(0, "required tag %s does not match any tracks", *tp
);
1482 nreqtracks
= hash_count(h
);
1483 reqtracks
= hash_keys(h
);
1485 while(nreqtracks
&& !track
&& tries
-- > 0) {
1486 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1487 candidate
= reqtracks
[r
];
1488 switch(check_suitable(candidate
, tid
,
1489 required_tags
, prohibited_tags
)) {
1495 case DB_LOCK_DEADLOCK
:
1500 /* No required tags. We pick random record numbers in the database
1502 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1505 case DB_LOCK_DEADLOCK
:
1506 error(0, "error querying tracks.db: %s", db_strerror(err
));
1509 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1512 error(0, "cannot pick tracks at random from an empty database");
1513 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1514 /* record numbers count from 1 upwards */
1515 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1516 memset(&key
, sizeof key
, 0);
1517 key
.flags
= DB_DBT_MALLOC
;
1518 key
.size
= sizeof r
;
1520 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1524 case DB_LOCK_DEADLOCK
:
1525 error(0, "error querying tracks.db: %s", db_strerror(err
));
1528 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1530 candidate
= xstrndup(key
.data
, key
.size
);
1531 switch(check_suitable(candidate
, tid
,
1532 required_tags
, prohibited_tags
)) {
1538 case DB_LOCK_DEADLOCK
:
1545 trackdb_closecursor(c
);
1547 trackdb_abort_transaction(tid
);
1549 trackdb_commit_transaction(tid
);
1551 error(0, "could not pick a random track");
1555 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1556 * from the prefs. */
1557 static const char *getpart(const char *track
,
1558 const char *context
,
1560 const struct kvp
*p
,
1565 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1566 if((result
= kvp_get(p
, pref
)))
1569 result
= trackname_part(track
, context
, part
);
1570 assert(result
!= 0);
1574 /* get a track name part, like trackname_part(), but taking the database into
1576 const char *trackdb_getpart(const char *track
,
1577 const char *context
,
1585 /* construct the full pref */
1586 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1588 tid
= trackdb_begin_transaction();
1589 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1593 trackdb_abort_transaction(tid
);
1595 trackdb_commit_transaction(tid
);
1596 return getpart(actual
, context
, part
, p
, &used_db
);
1599 /* get the raw path name for @track@ (might be an alias) */
1600 const char *trackdb_rawpath(const char *track
) {
1606 tid
= trackdb_begin_transaction();
1607 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1611 trackdb_abort_transaction(tid
);
1613 trackdb_commit_transaction(tid
);
1614 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1618 /* trackdb_list **************************************************************/
1620 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1621 * readable at some point */
1623 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1624 * If RE is a null pointer then it matches everything. */
1625 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1633 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1634 case PCRE_ERROR_NOMATCH
: return 0;
1637 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1644 static int do_list(struct vector
*v
, const char *dir
,
1645 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1651 size_t l
, last_dir_len
= 0;
1652 char *last_dir
= 0, *track
, *alias
;
1656 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1659 /* find the first key >= dir */
1660 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1661 /* keep going while we're dealing with <dir/anything> */
1664 && ((char *)k
.data
)[dl
] == '/'
1665 && !memcmp(k
.data
, dir
, dl
)) {
1666 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1668 /* we have <dir/component/anything>, so <dir/component> is a directory */
1669 l
= ptr
- (char *)k
.data
;
1670 if(what
& trackdb_directories
)
1672 && l
== last_dir_len
1673 && !memcmp(last_dir
, k
.data
, l
))) {
1674 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1675 if(track_matches(dl
, k
.data
, l
, re
))
1676 vector_append(v
, last_dir
);
1679 /* found a plain file */
1680 if((what
& trackdb_files
)) {
1681 track
= xstrndup(k
.data
, k
.size
);
1682 if((err
= trackdb_getdata(trackdb_prefsdb
,
1683 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1685 /* if this file has an alias in the same directory then we skip it */
1686 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1688 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1689 if(track_matches(dl
, k
.data
, k
.size
, re
))
1690 vector_append(v
, track
);
1693 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1701 case DB_LOCK_DEADLOCK
:
1702 error(0, "error querying database: %s", db_strerror(err
));
1705 fatal(0, "error querying database: %s", db_strerror(err
));
1708 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1712 /* return the directories or files below @dir@ */
1713 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1721 tid
= trackdb_begin_transaction();
1724 if(do_list(&v
, dir
, what
, re
, tid
))
1727 for(n
= 0; n
< config
->collection
.n
; ++n
)
1728 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1733 trackdb_abort_transaction(tid
);
1735 trackdb_commit_transaction(tid
);
1736 vector_terminate(&v
);
1742 /* If S is tag:something, return something. Else return 0. */
1743 static const char *checktag(const char *s
) {
1744 if(!strncmp(s
, "tag:", 4))
1750 /* return a list of tracks containing all of the words given. If you
1751 * ask for only stopwords you get no tracks. */
1752 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1753 const char **w
, *best
= 0, *tag
;
1754 char **twords
, **tags
;
1755 int i
, j
, n
, err
, what
;
1765 *ntracks
= 0; /* for early returns */
1766 /* casefold all the words */
1767 w
= xmalloc(nwordlist
* sizeof (char *));
1768 for(n
= 0; n
< nwordlist
; ++n
) {
1769 w
[n
] = utf8_casefold_compat(wordlist
[n
], strlen(wordlist
[n
]), 0);
1770 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1772 /* find the longest non-stopword */
1773 for(n
= 0; n
< nwordlist
; ++n
)
1774 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1775 if(!best
|| strlen(w
[n
]) > strlen(best
))
1777 /* TODO: we should at least in principal be able to identify the word or tag
1778 * with the least matches in log time, and choose that as our primary search
1780 if(ntags
&& !best
) {
1781 /* Only tags are listed. We limit to the first and narrow down with the
1783 best
= checktag(w
[0]);
1784 db
= trackdb_tagsdb
;
1787 /* We can limit to some word. */
1788 db
= trackdb_searchdb
;
1791 /* Only stopwords */
1797 tid
= trackdb_begin_transaction();
1798 /* find all the tracks that have that word */
1803 cursor
= trackdb_opencursor(db
, tid
);
1804 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1805 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1812 case DB_LOCK_DEADLOCK
:
1813 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1816 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1818 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1820 /* do a naive search over that (hopefuly fairly small) list of tracks */
1822 for(n
= 0; n
< v
.nvec
; ++n
) {
1823 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1826 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1829 twords
= track_to_words(v
.vec
[n
], p
);
1830 tags
= parsetags(kvp_get(p
, "tags"));
1831 for(i
= 0; i
< nwordlist
; ++i
) {
1832 if((tag
= checktag(w
[i
]))) {
1833 /* Track must have this tag */
1834 for(j
= 0; tags
[j
]; ++j
)
1835 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1836 if(!tags
[j
]) break; /* tag not found */
1838 /* Track must contain this word */
1839 for(j
= 0; twords
[j
]; ++j
)
1840 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1841 if(!twords
[j
]) break; /* word not found */
1844 if(i
>= nwordlist
) /* all words found */
1845 vector_append(&u
, v
.vec
[n
]);
1849 trackdb_closecursor(cursor
);
1851 trackdb_abort_transaction(tid
);
1852 info("retrying search");
1854 trackdb_commit_transaction(tid
);
1855 vector_terminate(&u
);
1861 /* trackdb_scan **************************************************************/
1863 int trackdb_scan(const char *root
,
1864 int (*callback
)(const char *track
,
1872 const size_t root_len
= root ?
strlen(root
) : 0;
1877 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1879 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1882 memset(&k
, 0, sizeof k
);
1883 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1888 || (k
.size
> root_len
1889 && !strncmp(k
.data
, root
, root_len
)
1890 && ((char *)k
.data
)[root_len
] == '/')) {
1891 data
= kvp_urldecode(d
.data
, d
.size
);
1892 if(kvp_get(data
, "_path")) {
1893 track
= xstrndup(k
.data
, k
.size
);
1894 /* Advance to the next track before the callback so that the callback
1895 * may safely delete the track */
1896 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1897 if((cberr
= callback(track
, data
, u
, tid
))) {
1902 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1906 trackdb_closecursor(cursor
);
1913 case DB_LOCK_DEADLOCK
:
1914 error(0, "c->c_get: %s", db_strerror(err
));
1917 fatal(0, "c->c_get: %s", db_strerror(err
));
1921 /* trackdb_rescan ************************************************************/
1923 /* called when the rescanner terminates */
1924 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1927 const struct rusage
attribute((unused
)) *rusage
,
1928 void attribute((unused
)) *u
) {
1929 if(pid
== rescan_pid
) rescan_pid
= -1;
1931 error(0, "disorderd-rescan: %s", wstat(status
));
1933 D(("disorderd-rescan terminate: %s", wstat(status
)));
1934 /* Our cache of file lookups is out of date now */
1935 cache_clean(&cache_files_type
);
1936 eventlog("rescanned", (char *)0);
1940 void trackdb_rescan(ev_source
*ev
) {
1941 if(rescan_pid
!= -1) {
1942 error(0, "rescan already underway");
1945 rescan_pid
= subprogram(ev
, RESCAN
, -1);
1946 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1947 D(("started rescanner"));
1951 int trackdb_rescan_cancel(void) {
1952 if(rescan_pid
== -1) return 0;
1953 if(kill(rescan_pid
, SIGTERM
) < 0)
1954 fatal(errno
, "error killing rescanner");
1959 /* global prefs **************************************************************/
1961 void trackdb_set_global(const char *name
,
1969 tid
= trackdb_begin_transaction();
1970 if(!(err
= trackdb_set_global_tid(name
, value
, tid
)))
1972 trackdb_abort_transaction(tid
);
1974 trackdb_commit_transaction(tid
);
1975 /* log important state changes */
1976 if(!strcmp(name
, "playing")) {
1977 state
= !value
|| !strcmp(value
, "yes");
1978 info("playing %s by %s",
1979 state ?
"enabled" : "disabled",
1981 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1983 if(!strcmp(name
, "random-play")) {
1984 state
= !value
|| !strcmp(value
, "yes");
1985 info("random play %s by %s",
1986 state ?
"enabled" : "disabled",
1988 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1990 if(!strcmp(name
, "required-tags"))
1994 int trackdb_set_global_tid(const char *name
,
2000 memset(&k
, 0, sizeof k
);
2001 memset(&d
, 0, sizeof d
);
2002 k
.data
= (void *)name
;
2003 k
.size
= strlen(name
);
2005 d
.data
= (void *)value
;
2006 d
.size
= strlen(value
);
2009 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
2011 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
2012 if(err
== DB_LOCK_DEADLOCK
) return err
;
2014 fatal(0, "error updating database: %s", db_strerror(err
));
2018 const char *trackdb_get_global(const char *name
) {
2024 tid
= trackdb_begin_transaction();
2025 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
2027 trackdb_abort_transaction(tid
);
2029 trackdb_commit_transaction(tid
);
2033 int trackdb_get_global_tid(const char *name
,
2039 memset(&k
, 0, sizeof k
);
2040 k
.data
= (void *)name
;
2041 k
.size
= strlen(name
);
2042 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
2043 prepare_data(&d
), 0)) {
2045 *rp
= xstrndup(d
.data
, d
.size
);
2050 case DB_LOCK_DEADLOCK
:
2053 fatal(0, "error reading database: %s", db_strerror(err
));
2057 /** @brief Retrieve the most recently added tracks
2058 * @param ntracksp Where to put count, or 0
2059 * @param maxtracks Maximum number of tracks to retrieve
2060 * @return null-terminated array of track names
2062 * The most recently added track is first in the array.
2064 char **trackdb_new(int *ntracksp
,
2070 tid
= trackdb_begin_transaction();
2071 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
2074 trackdb_abort_transaction(tid
);
2076 trackdb_commit_transaction(tid
);
2080 /** @brief Retrieve the most recently added tracks
2081 * @param ntracksp Where to put count, or 0
2082 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2083 * @param tid Transaction ID
2084 * @return null-terminated array of track names, or NULL on deadlock
2086 * The most recently added track is first in the array.
2088 static char **trackdb_new_tid(int *ntracksp
,
2094 struct vector tracks
[1];
2096 vector_init(tracks
);
2097 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2098 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
2099 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
2100 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
2102 case 0: /* hit maxtracks */
2103 case DB_NOTFOUND
: /* ran out of tracks */
2105 case DB_LOCK_DEADLOCK
:
2106 trackdb_closecursor(c
);
2109 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
2111 if((err
= trackdb_closecursor(c
)))
2112 return 0; /* deadlock */
2113 vector_terminate(tracks
);
2115 *ntracksp
= tracks
->nvec
;
2119 /** @brief Expire noticed.db
2120 * @param earliest Earliest timestamp to keep
2122 void trackdb_expire_noticed(time_t earliest
) {
2126 tid
= trackdb_begin_transaction();
2127 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2129 trackdb_abort_transaction(tid
);
2131 trackdb_commit_transaction(tid
);
2134 /** @brief Expire noticed.db
2135 * @param earliest Earliest timestamp to keep
2136 * @param tid Transaction ID
2137 * @return 0 or DB_LOCK_DEADLOCK
2139 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2147 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2148 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2150 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2151 if(when
>= earliest
)
2153 if((err
= c
->c_del(c
, 0))) {
2154 if(err
!= DB_LOCK_DEADLOCK
)
2155 fatal(0, "error deleting expired noticed.db entry: %s",
2161 if(err
== DB_NOTFOUND
)
2163 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2164 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2166 if((err
= trackdb_closecursor(c
))) {
2167 if(err
!= DB_LOCK_DEADLOCK
)
2168 fatal(0, "error closing cursor: %s", db_strerror(err
));
2172 info("expired %d tracks from noticed.db", count
);
2176 /* tidying up ****************************************************************/
2178 void trackdb_gc(void) {
2182 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2183 config
->checkpoint_kbyte
,
2184 config
->checkpoint_min
,
2186 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2187 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2188 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2189 /* This makes catastrophic recovery impossible. However, the user can still
2190 * preserve the important data by using disorder-dump to snapshot their
2191 * prefs, and later to restore it. This is likely to have much small
2192 * long-term storage requirements than record the db logfiles. */
2200 indent-tabs-mode:nil