2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track
,
65 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
);
66 static int trackdb_get_global_tid(const char *name
,
69 static char **trackdb_new_tid(int *ntracksp
,
72 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
74 const struct cache_type cache_files_type
= { 86400 };
75 unsigned long cache_files_hits
, cache_files_misses
;
77 /* setup and teardown ********************************************************/
79 static const char *home
; /* home had better not change */
80 DB_ENV
*trackdb_env
; /* db environment */
81 DB
*trackdb_tracksdb
; /* the db itself */
82 DB
*trackdb_prefsdb
; /* preferences */
83 DB
*trackdb_searchdb
; /* the search database */
84 DB
*trackdb_tagsdb
; /* the tags database */
85 DB
*trackdb_globaldb
; /* global preferences */
86 DB
*trackdb_noticeddb
; /* when track noticed */
87 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
88 static pid_t rescan_pid
= -1; /* rescanner PID */
89 static int initialized
, opened
; /* state */
91 /* tracks matched by required_tags */
92 static char **reqtracks
;
93 static size_t nreqtracks
;
95 /* comparison function for keys */
96 static int compare(DB
attribute((unused
)) *db_
,
97 const DBT
*a
, const DBT
*b
) {
98 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
101 /* open environment */
102 void trackdb_init(int recover
) {
104 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
107 assert(initialized
== 0);
110 if(strcmp(home
, config
->home
))
111 fatal(0, "cannot change db home without server restart");
115 /* create environment */
116 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
118 if((err
= trackdb_env
->set_alloc(trackdb_env
,
119 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
120 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
121 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
122 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
123 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
124 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
125 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
131 |recover_type
[recover
],
133 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
134 trackdb_env
->set_errpfx(trackdb_env
, "DB");
135 trackdb_env
->set_errfile(trackdb_env
, stderr
);
136 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
137 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
138 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
139 D(("initialized database environment"));
142 /* called when deadlock manager terminates */
143 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
144 pid_t
attribute((unused
)) pid
,
146 const struct rusage
attribute((unused
)) *rusage
,
147 void attribute((unused
)) *u
) {
148 db_deadlock_pid
= -1;
150 fatal(0, "deadlock manager unexpectedly terminated: %s",
153 D(("deadlock manager terminated: %s", wstat(status
)));
157 static pid_t
subprogram(ev_source
*ev
, const char *prog
) {
161 /* If we're in the background then trap subprocess stdout/stderr */
163 lfd
= logfd(ev
, prog
);
166 if(!(pid
= xfork())) {
168 ev_signal_atfork(ev
);
169 signal(SIGPIPE
, SIG_DFL
);
174 /* If we were negatively niced, undo it. We don't bother checking for
175 * error, it's not that important. */
176 setpriority(PRIO_PROCESS
, 0, 0);
177 execlp(prog
, prog
, "--config", configfile
,
178 debugging ?
"--debug" : "--no-debug",
180 fatal(errno
, "error invoking %s", prog
);
182 if(lfd
!= -1) xclose(lfd
);
186 /* start deadlock manager */
187 void trackdb_master(ev_source
*ev
) {
188 assert(db_deadlock_pid
== -1);
189 db_deadlock_pid
= subprogram(ev
, DEADLOCK
);
190 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
191 D(("started deadlock manager"));
194 /* close environment */
195 void trackdb_deinit(void) {
199 assert(initialized
== 1);
202 /* close the environment */
203 if((err
= trackdb_env
->close(trackdb_env
, 0)))
204 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
206 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
207 fatal(errno
, "error killing rescanner");
209 /* terminate the deadlock manager */
210 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
211 fatal(errno
, "error killing deadlock manager");
212 db_deadlock_pid
= -1;
214 D(("deinitialized database environment"));
217 /* open a specific database */
218 static DB
*open_db(const char *path
,
226 D(("open %s", path
));
227 path
= config_get_file(path
);
228 if((err
= db_create(&db
, trackdb_env
, 0)))
229 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
231 if((err
= db
->set_flags(db
, dbflags
)))
232 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
233 if(dbtype
== DB_BTREE
)
234 if((err
= db
->set_bt_compare(db
, compare
)))
235 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
236 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
237 openflags
| DB_AUTO_COMMIT
, mode
)))
238 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
242 /* open track databases */
243 void trackdb_open(void) {
247 /* open the databases */
248 trackdb_tracksdb
= open_db("tracks.db",
249 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
250 trackdb_searchdb
= open_db("search.db",
251 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
252 trackdb_tagsdb
= open_db("tags.db",
253 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
254 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
255 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
256 trackdb_noticeddb
= open_db("noticed.db",
257 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
258 D(("opened databases"));
261 /* close track databases */
262 void trackdb_close(void) {
268 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
269 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
270 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
271 fatal(0, "error closing search.db: %s", db_strerror(err
));
272 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
273 fatal(0, "error closing tags.db: %s", db_strerror(err
));
274 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
275 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
276 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
277 fatal(0, "error closing global.db: %s", db_strerror(err
));
278 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
279 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
280 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
281 trackdb_tagsdb
= trackdb_globaldb
= 0;
282 D(("closed databases"));
285 /* generic db routines *******************************************************/
287 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
288 * DB_LOCK_DEADLOCK. */
289 int trackdb_getdata(DB
*db
,
296 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
297 prepare_data(&data
), 0)) {
299 *kp
= kvp_urldecode(data
.data
, data
.size
);
304 case DB_LOCK_DEADLOCK
:
305 error(0, "error querying database: %s", db_strerror(err
));
308 fatal(0, "error querying database: %s", db_strerror(err
));
312 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
313 * DB_LOCK_DEADLOCK. */
314 int trackdb_putdata(DB
*db
,
322 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
323 encode_data(&data
, k
), flags
)) {
327 case DB_LOCK_DEADLOCK
:
328 error(0, "error updating database: %s", db_strerror(err
));
331 fatal(0, "error updating database: %s", db_strerror(err
));
335 /* delete a database entry */
336 int trackdb_delkey(DB
*db
,
342 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
346 case DB_LOCK_DEADLOCK
:
347 error(0, "error updating database: %s", db_strerror(err
));
350 fatal(0, "error updating database: %s", db_strerror(err
));
354 /* open a database cursor */
355 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
359 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
361 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
366 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
367 int trackdb_closecursor(DBC
*c
) {
371 switch(err
= c
->c_close(c
)) {
374 case DB_LOCK_DEADLOCK
:
375 error(0, "error closing cursor: %s", db_strerror(err
));
378 fatal(0, "error closing cursor: %s", db_strerror(err
));
382 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
383 int trackdb_delkeydata(DB
*db
,
391 c
= trackdb_opencursor(db
, tid
);
392 switch(err
= c
->c_get(c
, make_key(&key
, word
),
393 make_key(&data
, track
), DB_GET_BOTH
)) {
395 switch(err
= c
->c_del(c
, 0)) {
401 case DB_LOCK_DEADLOCK
:
402 error(0, "error updating database: %s", db_strerror(err
));
405 fatal(0, "c->c_del: %s", db_strerror(err
));
410 case DB_LOCK_DEADLOCK
:
411 error(0, "error updating database: %s", db_strerror(err
));
414 fatal(0, "c->c_get: %s", db_strerror(err
));
416 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
420 /* start a transaction */
421 DB_TXN
*trackdb_begin_transaction(void) {
425 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
426 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
430 /* abort transaction */
431 void trackdb_abort_transaction(DB_TXN
*tid
) {
435 if((err
= tid
->abort(tid
)))
436 fatal(0, "tid->abort: %s", db_strerror(err
));
439 /* commit transaction */
440 void trackdb_commit_transaction(DB_TXN
*tid
) {
443 if((err
= tid
->commit(tid
, 0)))
444 fatal(0, "tid->commit: %s", db_strerror(err
));
447 /* search/tags shared code ***************************************************/
449 /* comparison function used by dedupe() */
450 static int wordcmp(const void *a
, const void *b
) {
451 return strcmp(*(const char **)a
, *(const char **)b
);
454 /* sort and de-dupe VEC */
455 static char **dedupe(char **vec
, int nvec
) {
458 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
462 for(n
= 1; n
< nvec
; ++n
)
463 if(strcmp(vec
[n
], vec
[m
- 1]))
470 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
471 static int register_word(DB
*db
, const char *what
,
472 const char *track
, const char *word
,
477 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
478 make_key(&data
, track
), DB_NODUPDATA
)) {
482 case DB_LOCK_DEADLOCK
:
483 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
486 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
490 /* search primitives *********************************************************/
492 /* return true iff NAME is a trackname_display_ pref */
493 static int is_display_pref(const char *name
) {
494 static const char prefix
[] = "trackname_display_";
495 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
498 /* compute the words of a track name */
499 static char **track_to_words(const char *track
,
500 const struct kvp
*p
) {
504 const char *rootless
= track_rootless(track
);
507 rootless
= track
; /* bodge */
509 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
510 vector_append_many(&v
, w
, nw
);
512 for(; p
; p
= p
->next
)
513 if(is_display_pref(p
->name
))
514 if((w
= words(casefold(p
->value
), &nw
)))
515 vector_append_many(&v
, w
, nw
);
516 vector_terminate(&v
);
517 return dedupe(v
.vec
, v
.nvec
);
520 /* return nonzero iff WORD is a stopword */
521 static int stopword(const char *word
) {
524 for(n
= 0; n
< config
->stopword
.n
525 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
527 return n
< config
->stopword
.n
;
530 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
531 static int register_search_word(const char *track
, const char *word
,
533 if(stopword(word
)) return 0;
534 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
537 /* Tags **********************************************************************/
539 /* Return nonzero if C is a valid tag character */
540 static int tagchar(int c
) {
549 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
550 static char **parsetags(const char *s
) {
556 /* skip initial separators */
557 while(*s
&& (!tagchar(*s
) || *s
== ' '))
560 /* find the extent of the tag */
562 while(*s
&& tagchar(*s
))
564 /* strip trailing spaces */
565 while(s
> t
&& s
[-1] == ' ')
567 vector_append(&v
, xstrndup(t
, s
- t
));
568 /* skip intermediate and trailing separators */
569 while(*s
&& (!tagchar(*s
) || *s
== ' '))
573 vector_terminate(&v
);
574 return dedupe(v
.vec
, v
.nvec
);
577 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
578 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
579 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
582 /* aliases *******************************************************************/
584 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
585 * there is no alias sets *aliasp to 0. */
586 static int compute_alias(char **aliasp
,
591 const char *s
= config
->alias
, *t
, *expansion
, *part
;
592 int c
, used_db
= 0, slash_prefix
, err
;
594 const char *const root
= find_track_root(track
);
597 /* Bodge for tracks with no root */
602 dynstr_append_string(&d
, root
);
603 while((c
= (unsigned char)*s
++)) {
605 dynstr_append(&d
, c
);
608 if((slash_prefix
= (*s
== '/')))
611 assert(t
!= 0); /* validated at startup */
612 part
= xstrndup(s
, t
- s
);
613 expansion
= getpart(track
, "display", part
, p
, &used_db
);
615 if(slash_prefix
) dynstr_append(&d
, '/');
616 dynstr_append_string(&d
, expansion
);
618 s
= t
+ 1; /* skip {part} */
620 /* only admit to the alias if we used the db... */
625 dynstr_terminate(&d
);
626 /* ...and the answer differs from the original... */
627 if(!strcmp(track
, d
.vec
)) {
631 /* ...and there isn't already a different track with that name (including as
633 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
635 if((s
= kvp_get(at
, "_alias_for"))
636 && !strcmp(s
, track
)) {
648 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
649 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
650 * Always sets the return values, even if only to null pointers. */
651 static int gettrackdata(const char *track
,
654 const char **actualp
,
656 #define GTD_NOALIAS 0x0001
659 const char *actual
= track
;
660 struct kvp
*t
= 0, *p
= 0;
662 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
663 if((actual
= kvp_get(t
, "_alias_for"))) {
664 if(flags
& GTD_NOALIAS
) {
665 error(0, "alias passed to gettrackdata where real path required");
668 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
673 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
678 if(actualp
) *actualp
= actual
;
684 /* trackdb_notice() **********************************************************/
686 /** @brief notice a possiby new track
687 * @return @c DB_NOTFOUND if new, 0 if already known
689 int trackdb_notice(const char *track
,
695 tid
= trackdb_begin_transaction();
696 err
= trackdb_notice_tid(track
, path
, tid
);
697 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
700 trackdb_abort_transaction(tid
);
702 trackdb_commit_transaction(tid
);
706 /** @brief notice a possiby new track
707 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
709 int trackdb_notice_tid(const char *track
,
713 struct kvp
*t
, *a
, *p
;
717 /* notice whether the tracks.db entry changes */
719 /* get any existing tracks entry */
720 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
722 ret
= err
; /* 0 or DB_NOTFOUND */
723 /* this is a real track */
724 t_changed
+= kvp_set(&t
, "_alias_for", 0);
725 t_changed
+= kvp_set(&t
, "_path", path
);
726 /* if we have an alias record it in the database */
727 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
729 /* won't overwrite someone else's alias as compute_alias() checks */
730 D(("%s: alias %s", track
, alias
));
732 kvp_set(&a
, "_alias_for", track
);
733 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
735 /* update search.db */
736 w
= track_to_words(track
, p
);
737 for(n
= 0; w
[n
]; ++n
)
738 if((err
= register_search_word(track
, w
[n
], tid
)))
741 w
= parsetags(kvp_get(p
, "tags"));
742 for(n
= 0; w
[n
]; ++n
)
743 if((err
= register_tag(track
, w
[n
], tid
)))
746 /* only store the tracks.db entry if it has changed */
747 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
749 if(ret
== DB_NOTFOUND
) {
750 uint32_t timestamp
[2];
755 timestamp
[0] = htonl((uint64_t)now
>> 32);
756 timestamp
[1] = htonl((uint32_t)now
);
757 memset(&key
, 0, sizeof key
);
758 key
.data
= timestamp
;
759 key
.size
= sizeof timestamp
;
760 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
761 make_key(&data
, track
), 0)) {
763 case DB_LOCK_DEADLOCK
: return err
;
764 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
770 /* trackdb_obsolete() ********************************************************/
772 /* obsolete a track */
773 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
778 if((err
= gettrackdata(track
, 0, &p
, 0,
779 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
781 else if(err
== DB_NOTFOUND
) return 0;
782 /* compute the alias, if any, and delete it */
783 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
785 /* if the alias points to some other track then compute_alias won't
787 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
790 /* update search.db */
791 w
= track_to_words(track
, p
);
792 for(n
= 0; w
[n
]; ++n
)
793 if(trackdb_delkeydata(trackdb_searchdb
,
794 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
797 w
= parsetags(kvp_get(p
, "tags"));
798 for(n
= 0; w
[n
]; ++n
)
799 if(trackdb_delkeydata(trackdb_tagsdb
,
800 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
803 /* update tracks.db */
804 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
806 /* We don't delete the prefs, so they survive temporary outages of the
807 * (possibly virtual) track filesystem */
811 /* trackdb_stats() ***********************************************************/
813 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
814 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
816 static const struct statinfo
{
819 } statinfo_hash
[] = {
835 }, statinfo_btree
[] = {
856 /* look up stats for DB */
857 static int get_stats(struct vector
*v
,
859 const struct statinfo
*si
,
868 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
871 case DB_LOCK_DEADLOCK
:
872 error(0, "error querying database: %s", db_strerror(err
));
875 fatal(0, "error querying database: %s", db_strerror(err
));
877 for(n
= 0; n
< nsi
; ++n
) {
878 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
879 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
880 vector_append(v
, str
);
886 struct search_entry
{
891 /* find the top COUNT words in the search database */
892 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
893 struct search_entry
*se
;
896 int err
, n
= 0, nse
= 0, i
;
901 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
902 se
= xmalloc(count
* sizeof *se
);
903 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
905 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
908 #define FINALIZE() do { \
909 if(word && (nse < count || n > se[nse - 1].n)) { \
914 while(i > 0 && n > se[i - 1].n) \
916 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
922 word
= xstrndup(k
.data
, wl
= k
.size
);
930 case DB_LOCK_DEADLOCK
:
931 error(0, "error querying search database: %s", db_strerror(err
));
934 fatal(0, "error querying search database: %s", db_strerror(err
));
936 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
939 byte_xasprintf(&str
, "Top %d search words:", nse
);
940 vector_append(v
, str
);
941 for(i
= 0; i
< nse
; ++i
) {
942 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
943 vector_append(v
, str
);
948 #define SI(what) statinfo_##what, \
949 sizeof statinfo_##what / sizeof (struct statinfo)
951 /* return a list of database stats */
952 char **trackdb_stats(int *nstatsp
) {
959 tid
= trackdb_begin_transaction();
961 vector_append(&v
, (char *)"Tracks database stats:");
962 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
963 vector_append(&v
, (char *)"");
964 vector_append(&v
, (char *)"Search database stats:");
965 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
966 vector_append(&v
, (char *)"");
967 vector_append(&v
, (char *)"Prefs database stats:");
968 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
969 vector_append(&v
, (char *)"");
970 if(search_league(&v
, 10, tid
)) goto fail
;
971 vector_append(&v
, (char *)"");
972 vector_append(&v
, (char *)"Server stats:");
973 byte_xasprintf(&s
, "track lookup cache hits: %lu", cache_files_hits
);
974 vector_append(&v
, (char *)s
);
975 byte_xasprintf(&s
, "track lookup cache misses: %lu", cache_files_misses
);
976 vector_append(&v
, (char *)s
);
977 vector_terminate(&v
);
980 trackdb_abort_transaction(tid
);
982 trackdb_commit_transaction(tid
);
983 if(nstatsp
) *nstatsp
= v
.nvec
;
987 /* set a pref (remove if value=0) */
988 int trackdb_set(const char *track
,
991 struct kvp
*t
, *p
, *a
;
994 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
997 /* TODO: if value matches default then set value=0 */
1001 tid
= trackdb_begin_transaction();
1002 if((err
= gettrackdata(track
, &t
, &p
, 0,
1003 0, tid
)) == DB_LOCK_DEADLOCK
)
1005 if(err
== DB_NOTFOUND
) break;
1006 if(name
[0] == '_') {
1007 if(kvp_set(&t
, name
, value
))
1008 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1011 /* get the old alias name */
1012 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1013 /* get the old tags */
1014 if(!strcmp(name
, "tags"))
1015 oldtags
= parsetags(kvp_get(p
, "tags"));
1017 if(kvp_set(&p
, name
, value
))
1018 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1020 /* compute the new alias name */
1021 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1022 /* check whether alias has changed */
1023 if(!(oldalias
== newalias
1024 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1025 /* adjust alias records to fit change */
1027 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1030 kvp_set(&a
, "_alias_for", track
);
1031 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1034 /* check whether tags have changed */
1035 if(!strcmp(name
, "tags")) {
1036 newtags
= parsetags(value
);
1037 while(*oldtags
|| *newtags
) {
1038 if(*oldtags
&& *newtags
) {
1039 cmp
= strcmp(*oldtags
, *newtags
);
1041 /* keeping this tag */
1045 /* old tag fits into a gap in the new list, so delete old */
1048 /* new tag fits into a gap in the old list, so insert new */
1050 } else if(*oldtags
) {
1051 /* we've run out of new tags, so remaining old ones are to be
1054 if(trackdb_delkeydata(trackdb_tagsdb
,
1055 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1059 /* we've run out of old tags, so remainig new ones are to be
1062 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1072 trackdb_abort_transaction(tid
);
1074 trackdb_commit_transaction(tid
);
1075 return err
== 0 ?
0 : -1;
1079 const char *trackdb_get(const char *track
,
1081 return kvp_get(trackdb_get_all(track
), name
);
1084 /* get all prefs as a 0-terminated array */
1085 struct kvp
*trackdb_get_all(const char *track
) {
1086 struct kvp
*t
, *p
, **pp
;
1090 tid
= trackdb_begin_transaction();
1091 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1095 trackdb_abort_transaction(tid
);
1097 trackdb_commit_transaction(tid
);
1098 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1105 const char *trackdb_resolve(const char *track
) {
1110 tid
= trackdb_begin_transaction();
1111 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1115 trackdb_abort_transaction(tid
);
1117 trackdb_commit_transaction(tid
);
1121 int trackdb_isalias(const char *track
) {
1122 const char *actual
= trackdb_resolve(track
);
1124 return strcmp(actual
, track
);
1127 /* test whether a track exists (perhaps an alias) */
1128 int trackdb_exists(const char *track
) {
1133 tid
= trackdb_begin_transaction();
1134 /* unusually, here we want the return value */
1135 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1139 trackdb_abort_transaction(tid
);
1141 trackdb_commit_transaction(tid
);
1145 /* return the list of tags */
1146 char **trackdb_alltags(void) {
1152 tid
= trackdb_begin_transaction();
1153 err
= trackdb_alltags_tid(tid
, &taglist
);
1155 trackdb_abort_transaction(tid
);
1157 trackdb_commit_transaction(tid
);
1161 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1168 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1169 memset(&k
, 0, sizeof k
);
1170 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1171 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1175 case DB_LOCK_DEADLOCK
:
1178 fatal(0, "c->c_get: %s", db_strerror(err
));
1180 if((err
= trackdb_closecursor(c
))) return err
;
1181 vector_terminate(&v
);
1186 /* return 1 iff sorted tag lists A and B have at least one member in common */
1187 static int tag_intersection(char **a
, char **b
) {
1190 /* Same sort of logic as trackdb_set() above */
1192 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1193 else if(cmp
< 0) ++a
;
1199 /* Check whether a track is suitable for random play. Returns 0 if it is,
1200 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1202 static int check_suitable(const char *track
,
1204 char **required_tags
,
1205 char **prohibited_tags
) {
1209 const char *pick_at_random
, *played_time
;
1211 /* don't pick tracks that aren't in any surviving collection (for instance
1212 * you've edited the config but the rescan hasn't done its job yet) */
1213 if(!find_track_root(track
)) {
1214 info("found track not in any collection: %s", track
);
1217 /* don't pick aliases - only pick the canonical form */
1218 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1219 return DB_LOCK_DEADLOCK
;
1220 if(kvp_get(t
, "_alias_for"))
1222 /* check that random play is not suppressed for this track */
1223 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1224 && !strcmp(pick_at_random
, "0"))
1226 /* don't pick a track that's been played in the last 8 hours */
1227 if((played_time
= kvp_get(p
, "played_time"))) {
1228 last
= atoll(played_time
);
1230 if(now
< last
+ 8 * 3600) /* TODO configurable */
1233 track_tags
= parsetags(kvp_get(p
, "tags"));
1234 /* check that no prohibited tag is present for this track */
1235 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1237 /* check that at least one required tags is present for this track */
1238 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1243 /* attempt to pick a random non-alias track */
1244 const char *trackdb_random(int tries
) {
1249 const char *track
, *candidate
;
1252 char **required_tags
, **prohibited_tags
, **tp
;
1257 tid
= trackdb_begin_transaction();
1258 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1260 required_tags
= parsetags(tags
);
1261 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1263 prohibited_tags
= parsetags(tags
);
1265 if(*required_tags
) {
1266 /* Bung all the suitable tracks into a hash and convert to a list of keys
1267 * (to eliminate duplicates). We cache this list since it is possible
1268 * that it will be very large. */
1271 for(tp
= required_tags
; *tp
; ++tp
) {
1272 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1273 memset(&key
, 0, sizeof key
);
1275 key
.size
= strlen(*tp
);
1277 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1279 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1280 HASH_INSERT_OR_REPLACE
);
1282 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1288 case DB_LOCK_DEADLOCK
:
1291 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1293 trackdb_closecursor(c
);
1296 error(0, "required tag %s does not match any tracks", *tp
);
1298 nreqtracks
= hash_count(h
);
1299 reqtracks
= hash_keys(h
);
1301 while(nreqtracks
&& !track
&& tries
-- > 0) {
1302 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1303 candidate
= reqtracks
[r
];
1304 switch(check_suitable(candidate
, tid
,
1305 required_tags
, prohibited_tags
)) {
1311 case DB_LOCK_DEADLOCK
:
1316 /* No required tags. We pick random record numbers in the database
1318 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1321 case DB_LOCK_DEADLOCK
:
1322 error(0, "error querying tracks.db: %s", db_strerror(err
));
1325 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1328 error(0, "cannot pick tracks at random from an empty database");
1329 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1330 /* record numbers count from 1 upwards */
1331 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1332 memset(&key
, sizeof key
, 0);
1333 key
.flags
= DB_DBT_MALLOC
;
1334 key
.size
= sizeof r
;
1336 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1340 case DB_LOCK_DEADLOCK
:
1341 error(0, "error querying tracks.db: %s", db_strerror(err
));
1344 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1346 candidate
= xstrndup(key
.data
, key
.size
);
1347 switch(check_suitable(candidate
, tid
,
1348 required_tags
, prohibited_tags
)) {
1354 case DB_LOCK_DEADLOCK
:
1361 trackdb_closecursor(c
);
1363 trackdb_abort_transaction(tid
);
1365 trackdb_commit_transaction(tid
);
1367 error(0, "could not pick a random track");
1371 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1372 * from the prefs. */
1373 static const char *getpart(const char *track
,
1374 const char *context
,
1376 const struct kvp
*p
,
1381 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1382 if((result
= kvp_get(p
, pref
)))
1385 result
= trackname_part(track
, context
, part
);
1386 assert(result
!= 0);
1390 /* get a track name part, like trackname_part(), but taking the database into
1392 const char *trackdb_getpart(const char *track
,
1393 const char *context
,
1401 /* construct the full pref */
1402 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1404 tid
= trackdb_begin_transaction();
1405 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1409 trackdb_abort_transaction(tid
);
1411 trackdb_commit_transaction(tid
);
1412 return getpart(actual
, context
, part
, p
, &used_db
);
1415 /* get the raw path name for @track@ (might be an alias) */
1416 const char *trackdb_rawpath(const char *track
) {
1422 tid
= trackdb_begin_transaction();
1423 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1427 trackdb_abort_transaction(tid
);
1429 trackdb_commit_transaction(tid
);
1430 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1434 /* trackdb_list **************************************************************/
1436 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1437 * readable at some point */
1439 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1440 * If RE is a null pointer then it matches everything. */
1441 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1449 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1450 case PCRE_ERROR_NOMATCH
: return 0;
1453 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1460 static int do_list(struct vector
*v
, const char *dir
,
1461 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1467 size_t l
, last_dir_len
= 0;
1468 char *last_dir
= 0, *track
, *alias
;
1472 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1475 /* find the first key >= dir */
1476 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1477 /* keep going while we're dealing with <dir/anything> */
1480 && ((char *)k
.data
)[dl
] == '/'
1481 && !memcmp(k
.data
, dir
, dl
)) {
1482 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1484 /* we have <dir/component/anything>, so <dir/component> is a directory */
1485 l
= ptr
- (char *)k
.data
;
1486 if(what
& trackdb_directories
)
1488 && l
== last_dir_len
1489 && !memcmp(last_dir
, k
.data
, l
))) {
1490 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1491 if(track_matches(dl
, k
.data
, l
, re
))
1492 vector_append(v
, last_dir
);
1495 /* found a plain file */
1496 if((what
& trackdb_files
)) {
1497 track
= xstrndup(k
.data
, k
.size
);
1498 if((err
= trackdb_getdata(trackdb_prefsdb
,
1499 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1501 /* if this file has an alias in the same directory then we skip it */
1502 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1504 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1505 if(track_matches(dl
, k
.data
, k
.size
, re
))
1506 vector_append(v
, track
);
1509 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1517 case DB_LOCK_DEADLOCK
:
1518 error(0, "error querying database: %s", db_strerror(err
));
1521 fatal(0, "error querying database: %s", db_strerror(err
));
1524 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1528 /* return the directories or files below @dir@ */
1529 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1537 tid
= trackdb_begin_transaction();
1540 if(do_list(&v
, dir
, what
, re
, tid
))
1543 for(n
= 0; n
< config
->collection
.n
; ++n
)
1544 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1549 trackdb_abort_transaction(tid
);
1551 trackdb_commit_transaction(tid
);
1552 vector_terminate(&v
);
1558 /* If S is tag:something, return something. Else return 0. */
1559 static const char *checktag(const char *s
) {
1560 if(!strncmp(s
, "tag:", 4))
1566 /* return a list of tracks containing all of the words given. If you
1567 * ask for only stopwords you get no tracks. */
1568 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1569 const char **w
, *best
= 0, *tag
;
1570 char **twords
, **tags
;
1571 int i
, j
, n
, err
, what
;
1581 *ntracks
= 0; /* for early returns */
1582 /* casefold all the words */
1583 w
= xmalloc(nwordlist
* sizeof (char *));
1584 for(n
= 0; n
< nwordlist
; ++n
) {
1585 w
[n
] = casefold(wordlist
[n
]);
1586 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1588 /* find the longest non-stopword */
1589 for(n
= 0; n
< nwordlist
; ++n
)
1590 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1591 if(!best
|| strlen(w
[n
]) > strlen(best
))
1593 /* TODO: we should at least in principal be able to identify the word or tag
1594 * with the least matches in log time, and choose that as our primary search
1596 if(ntags
&& !best
) {
1597 /* Only tags are listed. We limit to the first and narrow down with the
1599 best
= checktag(w
[0]);
1600 db
= trackdb_tagsdb
;
1603 /* We can limit to some word. */
1604 db
= trackdb_searchdb
;
1607 /* Only stopwords */
1613 tid
= trackdb_begin_transaction();
1614 /* find all the tracks that have that word */
1619 cursor
= trackdb_opencursor(db
, tid
);
1620 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1621 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1628 case DB_LOCK_DEADLOCK
:
1629 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1632 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1634 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1636 /* do a naive search over that (hopefuly fairly small) list of tracks */
1638 for(n
= 0; n
< v
.nvec
; ++n
) {
1639 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1642 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1645 twords
= track_to_words(v
.vec
[n
], p
);
1646 tags
= parsetags(kvp_get(p
, "tags"));
1647 for(i
= 0; i
< nwordlist
; ++i
) {
1648 if((tag
= checktag(w
[i
]))) {
1649 /* Track must have this tag */
1650 for(j
= 0; tags
[j
]; ++j
)
1651 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1652 if(!tags
[j
]) break; /* tag not found */
1654 /* Track must contain this word */
1655 for(j
= 0; twords
[j
]; ++j
)
1656 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1657 if(!twords
[j
]) break; /* word not found */
1660 if(i
>= nwordlist
) /* all words found */
1661 vector_append(&u
, v
.vec
[n
]);
1665 trackdb_closecursor(cursor
);
1667 trackdb_abort_transaction(tid
);
1668 info("retrying search");
1670 trackdb_commit_transaction(tid
);
1671 vector_terminate(&u
);
1677 /* trackdb_scan **************************************************************/
1679 int trackdb_scan(const char *root
,
1680 int (*callback
)(const char *track
,
1688 const size_t root_len
= root ?
strlen(root
) : 0;
1693 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1695 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1698 memset(&k
, 0, sizeof k
);
1699 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1704 || (k
.size
> root_len
1705 && !strncmp(k
.data
, root
, root_len
)
1706 && ((char *)k
.data
)[root_len
] == '/')) {
1707 data
= kvp_urldecode(d
.data
, d
.size
);
1708 if(kvp_get(data
, "_path")) {
1709 track
= xstrndup(k
.data
, k
.size
);
1710 /* Advance to the next track before the callback so that the callback
1711 * may safely delete the track */
1712 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1713 if((cberr
= callback(track
, data
, u
, tid
))) {
1718 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1722 trackdb_closecursor(cursor
);
1729 case DB_LOCK_DEADLOCK
:
1730 error(0, "c->c_get: %s", db_strerror(err
));
1733 fatal(0, "c->c_get: %s", db_strerror(err
));
1737 /* trackdb_rescan ************************************************************/
1739 /* called when the rescanner terminates */
1740 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1743 const struct rusage
attribute((unused
)) *rusage
,
1744 void attribute((unused
)) *u
) {
1745 if(pid
== rescan_pid
) rescan_pid
= -1;
1747 error(0, "disorderd-rescan: %s", wstat(status
));
1749 D(("disorderd-rescan terminate: %s", wstat(status
)));
1750 /* Our cache of file lookups is out of date now */
1751 cache_clean(&cache_files_type
);
1752 eventlog("rescanned", (char *)0);
1756 void trackdb_rescan(ev_source
*ev
) {
1757 if(rescan_pid
!= -1) {
1758 error(0, "rescan already underway");
1761 rescan_pid
= subprogram(ev
, RESCAN
);
1762 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1763 D(("started rescanner"));
1767 int trackdb_rescan_cancel(void) {
1768 if(rescan_pid
== -1) return 0;
1769 if(kill(rescan_pid
, SIGTERM
) < 0)
1770 fatal(errno
, "error killing rescanner");
1775 /* global prefs **************************************************************/
1777 void trackdb_set_global(const char *name
,
1785 memset(&k
, 0, sizeof k
);
1786 memset(&d
, 0, sizeof d
);
1787 k
.data
= (void *)name
;
1788 k
.size
= strlen(name
);
1790 d
.data
= (void *)value
;
1791 d
.size
= strlen(value
);
1794 tid
= trackdb_begin_transaction();
1796 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1798 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1799 if(!err
|| err
== DB_NOTFOUND
) break;
1800 if(err
!= DB_LOCK_DEADLOCK
)
1801 fatal(0, "error updating database: %s", db_strerror(err
));
1802 trackdb_abort_transaction(tid
);
1804 trackdb_commit_transaction(tid
);
1805 /* log important state changes */
1806 if(!strcmp(name
, "playing")) {
1807 state
= !value
|| !strcmp(value
, "yes");
1808 info("playing %s by %s",
1809 state ?
"enabled" : "disabled",
1811 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1813 if(!strcmp(name
, "random-play")) {
1814 state
= !value
|| !strcmp(value
, "yes");
1815 info("random play %s by %s",
1816 state ?
"enabled" : "disabled",
1818 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1820 if(!strcmp(name
, "required-tags"))
1824 const char *trackdb_get_global(const char *name
) {
1830 tid
= trackdb_begin_transaction();
1831 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1833 trackdb_abort_transaction(tid
);
1835 trackdb_commit_transaction(tid
);
1839 static int trackdb_get_global_tid(const char *name
,
1845 memset(&k
, 0, sizeof k
);
1846 k
.data
= (void *)name
;
1847 k
.size
= strlen(name
);
1848 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1849 prepare_data(&d
), 0)) {
1851 *rp
= xstrndup(d
.data
, d
.size
);
1856 case DB_LOCK_DEADLOCK
:
1859 fatal(0, "error updating database: %s", db_strerror(err
));
1863 /** @brief Retrieve the most recently added tracks
1864 * @param ntracksp Where to put count, or 0
1865 * @param maxtracks Maximum number of tracks to retrieve
1866 * @return null-terminated array of track names
1868 * The most recently added track is first in the array.
1870 char **trackdb_new(int *ntracksp
,
1876 tid
= trackdb_begin_transaction();
1877 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1880 trackdb_abort_transaction(tid
);
1882 trackdb_commit_transaction(tid
);
1886 /** @brief Retrieve the most recently added tracks
1887 * @param ntracksp Where to put count, or 0
1888 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1889 * @param tid Transaction ID
1890 * @return null-terminated array of track names, or NULL on deadlock
1892 * The most recently added track is first in the array.
1894 static char **trackdb_new_tid(int *ntracksp
,
1900 struct vector tracks
[1];
1902 vector_init(tracks
);
1903 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1904 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1905 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1906 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1908 case 0: /* hit maxtracks */
1909 case DB_NOTFOUND
: /* ran out of tracks */
1911 case DB_LOCK_DEADLOCK
:
1912 trackdb_closecursor(c
);
1915 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
1917 if((err
= trackdb_closecursor(c
)))
1918 return 0; /* deadlock */
1919 vector_terminate(tracks
);
1921 *ntracksp
= tracks
->nvec
;
1925 /** @brief Expire noticed.db
1926 * @param earliest Earliest timestamp to keep
1928 void trackdb_expire_noticed(time_t earliest
) {
1932 tid
= trackdb_begin_transaction();
1933 if(!trackdb_expire_noticed_tid(earliest
, tid
))
1935 trackdb_abort_transaction(tid
);
1937 trackdb_commit_transaction(tid
);
1940 /** @brief Expire noticed.db
1941 * @param earliest Earliest timestamp to keep
1942 * @param tid Transaction ID
1943 * @return 0 or DB_LOCK_DEADLOCK
1945 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
1953 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1954 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
1956 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
1957 if(when
>= earliest
)
1959 if((err
= c
->c_del(c
, 0))) {
1960 if(err
!= DB_LOCK_DEADLOCK
)
1961 fatal(0, "error deleting expired noticed.db entry: %s",
1967 if(err
== DB_NOTFOUND
)
1969 if(err
&& err
!= DB_LOCK_DEADLOCK
)
1970 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
1972 if((err
= trackdb_closecursor(c
))) {
1973 if(err
!= DB_LOCK_DEADLOCK
)
1974 fatal(0, "error closing cursor: %s", db_strerror(err
));
1978 info("expired %d tracks from noticed.db", count
);
1982 /* tidying up ****************************************************************/
1984 void trackdb_gc(void) {
1988 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
1989 config
->checkpoint_kbyte
,
1990 config
->checkpoint_min
,
1992 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
1993 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
1994 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
1995 /* This makes catastrophic recovery impossible. However, the user can still
1996 * preserve the important data by using disorder-dump to snapshot their
1997 * prefs, and later to restore it. This is likely to have much small
1998 * long-term storage requirements than record the db logfiles. */
2006 indent-tabs-mode:nil