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
,
73 const struct cache_type cache_files_type
= { 86400 };
74 unsigned long cache_files_hits
, cache_files_misses
;
76 /* setup and teardown ********************************************************/
78 static const char *home
; /* home had better not change */
79 DB_ENV
*trackdb_env
; /* db environment */
80 DB
*trackdb_tracksdb
; /* the db itself */
81 DB
*trackdb_prefsdb
; /* preferences */
82 DB
*trackdb_searchdb
; /* the search database */
83 DB
*trackdb_tagsdb
; /* the tags database */
84 DB
*trackdb_globaldb
; /* global preferences */
85 DB
*trackdb_noticeddb
; /* when track noticed */
86 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
87 static pid_t rescan_pid
= -1; /* rescanner PID */
88 static int initialized
, opened
; /* state */
90 /* tracks matched by required_tags */
91 static char **reqtracks
;
92 static size_t nreqtracks
;
94 /* comparison function for keys */
95 static int compare(DB
attribute((unused
)) *db_
,
96 const DBT
*a
, const DBT
*b
) {
97 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
100 /* open environment */
101 void trackdb_init(int recover
) {
103 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
106 assert(initialized
== 0);
109 if(strcmp(home
, config
->home
))
110 fatal(0, "cannot change db home without server restart");
114 /* create environment */
115 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
117 if((err
= trackdb_env
->set_alloc(trackdb_env
,
118 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
119 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
120 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
121 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
122 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
123 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
124 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
130 |recover_type
[recover
],
132 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
133 trackdb_env
->set_errpfx(trackdb_env
, "DB");
134 trackdb_env
->set_errfile(trackdb_env
, stderr
);
135 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
136 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
137 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
138 D(("initialized database environment"));
141 /* called when deadlock manager terminates */
142 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
143 pid_t
attribute((unused
)) pid
,
145 const struct rusage
attribute((unused
)) *rusage
,
146 void attribute((unused
)) *u
) {
147 db_deadlock_pid
= -1;
149 fatal(0, "deadlock manager unexpectedly terminated: %s",
152 D(("deadlock manager terminated: %s", wstat(status
)));
156 static pid_t
subprogram(ev_source
*ev
, const char *prog
) {
160 /* If we're in the background then trap subprocess stdout/stderr */
162 lfd
= logfd(ev
, prog
);
165 if(!(pid
= xfork())) {
167 ev_signal_atfork(ev
);
168 signal(SIGPIPE
, SIG_DFL
);
173 /* If we were negatively niced, undo it. We don't bother checking for
174 * error, it's not that important. */
175 setpriority(PRIO_PROCESS
, 0, 0);
176 execlp(prog
, prog
, "--config", configfile
,
177 debugging ?
"--debug" : "--no-debug",
179 fatal(errno
, "error invoking %s", prog
);
181 if(lfd
!= -1) xclose(lfd
);
185 /* start deadlock manager */
186 void trackdb_master(ev_source
*ev
) {
187 assert(db_deadlock_pid
== -1);
188 db_deadlock_pid
= subprogram(ev
, DEADLOCK
);
189 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
190 D(("started deadlock manager"));
193 /* close environment */
194 void trackdb_deinit(void) {
198 assert(initialized
== 1);
201 /* close the environment */
202 if((err
= trackdb_env
->close(trackdb_env
, 0)))
203 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
205 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
206 fatal(errno
, "error killing rescanner");
208 /* terminate the deadlock manager */
209 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
210 fatal(errno
, "error killing deadlock manager");
211 db_deadlock_pid
= -1;
213 D(("deinitialized database environment"));
216 /* open a specific database */
217 static DB
*open_db(const char *path
,
225 D(("open %s", path
));
226 path
= config_get_file(path
);
227 if((err
= db_create(&db
, trackdb_env
, 0)))
228 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
230 if((err
= db
->set_flags(db
, dbflags
)))
231 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
232 if(dbtype
== DB_BTREE
)
233 if((err
= db
->set_bt_compare(db
, compare
)))
234 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
235 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
236 openflags
| DB_AUTO_COMMIT
, mode
)))
237 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
241 /* open track databases */
242 void trackdb_open(void) {
246 /* open the databases */
247 trackdb_tracksdb
= open_db("tracks.db",
248 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
249 trackdb_searchdb
= open_db("search.db",
250 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
251 trackdb_tagsdb
= open_db("tags.db",
252 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
253 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
254 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
255 trackdb_noticeddb
= open_db("noticed.db",
256 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
257 D(("opened databases"));
260 /* close track databases */
261 void trackdb_close(void) {
267 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
268 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
269 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
270 fatal(0, "error closing search.db: %s", db_strerror(err
));
271 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
272 fatal(0, "error closing tags.db: %s", db_strerror(err
));
273 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
274 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
275 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
276 fatal(0, "error closing global.db: %s", db_strerror(err
));
277 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
278 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
279 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
280 trackdb_tagsdb
= trackdb_globaldb
= 0;
281 D(("closed databases"));
284 /* generic db routines *******************************************************/
286 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
287 * DB_LOCK_DEADLOCK. */
288 int trackdb_getdata(DB
*db
,
295 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
296 prepare_data(&data
), 0)) {
298 *kp
= kvp_urldecode(data
.data
, data
.size
);
303 case DB_LOCK_DEADLOCK
:
304 error(0, "error querying database: %s", db_strerror(err
));
307 fatal(0, "error querying database: %s", db_strerror(err
));
311 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
312 * DB_LOCK_DEADLOCK. */
313 int trackdb_putdata(DB
*db
,
321 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
322 encode_data(&data
, k
), flags
)) {
326 case DB_LOCK_DEADLOCK
:
327 error(0, "error updating database: %s", db_strerror(err
));
330 fatal(0, "error updating database: %s", db_strerror(err
));
334 /* delete a database entry */
335 int trackdb_delkey(DB
*db
,
341 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
345 case DB_LOCK_DEADLOCK
:
346 error(0, "error updating database: %s", db_strerror(err
));
349 fatal(0, "error updating database: %s", db_strerror(err
));
353 /* open a database cursor */
354 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
358 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
360 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
365 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
366 int trackdb_closecursor(DBC
*c
) {
370 switch(err
= c
->c_close(c
)) {
373 case DB_LOCK_DEADLOCK
:
374 error(0, "error closing cursor: %s", db_strerror(err
));
377 fatal(0, "error closing cursor: %s", db_strerror(err
));
381 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
382 int trackdb_delkeydata(DB
*db
,
390 c
= trackdb_opencursor(db
, tid
);
391 switch(err
= c
->c_get(c
, make_key(&key
, word
),
392 make_key(&data
, track
), DB_GET_BOTH
)) {
394 switch(err
= c
->c_del(c
, 0)) {
400 case DB_LOCK_DEADLOCK
:
401 error(0, "error updating database: %s", db_strerror(err
));
404 fatal(0, "c->c_del: %s", db_strerror(err
));
409 case DB_LOCK_DEADLOCK
:
410 error(0, "error updating database: %s", db_strerror(err
));
413 fatal(0, "c->c_get: %s", db_strerror(err
));
415 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
419 /* start a transaction */
420 DB_TXN
*trackdb_begin_transaction(void) {
424 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
425 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
429 /* abort transaction */
430 void trackdb_abort_transaction(DB_TXN
*tid
) {
434 if((err
= tid
->abort(tid
)))
435 fatal(0, "tid->abort: %s", db_strerror(err
));
438 /* commit transaction */
439 void trackdb_commit_transaction(DB_TXN
*tid
) {
442 if((err
= tid
->commit(tid
, 0)))
443 fatal(0, "tid->commit: %s", db_strerror(err
));
446 /* search/tags shared code ***************************************************/
448 /* comparison function used by dedupe() */
449 static int wordcmp(const void *a
, const void *b
) {
450 return strcmp(*(const char **)a
, *(const char **)b
);
453 /* sort and de-dupe VEC */
454 static char **dedupe(char **vec
, int nvec
) {
457 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
461 for(n
= 1; n
< nvec
; ++n
)
462 if(strcmp(vec
[n
], vec
[m
- 1]))
469 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
470 static int register_word(DB
*db
, const char *what
,
471 const char *track
, const char *word
,
476 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
477 make_key(&data
, track
), DB_NODUPDATA
)) {
481 case DB_LOCK_DEADLOCK
:
482 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
485 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
489 /* search primitives *********************************************************/
491 /* return true iff NAME is a trackname_display_ pref */
492 static int is_display_pref(const char *name
) {
493 static const char prefix
[] = "trackname_display_";
494 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
497 /* compute the words of a track name */
498 static char **track_to_words(const char *track
,
499 const struct kvp
*p
) {
503 const char *rootless
= track_rootless(track
);
506 rootless
= track
; /* bodge */
508 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
509 vector_append_many(&v
, w
, nw
);
511 for(; p
; p
= p
->next
)
512 if(is_display_pref(p
->name
))
513 if((w
= words(casefold(p
->value
), &nw
)))
514 vector_append_many(&v
, w
, nw
);
515 vector_terminate(&v
);
516 return dedupe(v
.vec
, v
.nvec
);
519 /* return nonzero iff WORD is a stopword */
520 static int stopword(const char *word
) {
523 for(n
= 0; n
< config
->stopword
.n
524 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
526 return n
< config
->stopword
.n
;
529 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
530 static int register_search_word(const char *track
, const char *word
,
532 if(stopword(word
)) return 0;
533 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
536 /* Tags **********************************************************************/
538 /* Return nonzero if C is a valid tag character */
539 static int tagchar(int c
) {
548 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
549 static char **parsetags(const char *s
) {
555 /* skip initial separators */
556 while(*s
&& (!tagchar(*s
) || *s
== ' '))
559 /* find the extent of the tag */
561 while(*s
&& tagchar(*s
))
563 /* strip trailing spaces */
564 while(s
> t
&& s
[-1] == ' ')
566 vector_append(&v
, xstrndup(t
, s
- t
));
567 /* skip intermediate and trailing separators */
568 while(*s
&& (!tagchar(*s
) || *s
== ' '))
572 vector_terminate(&v
);
573 return dedupe(v
.vec
, v
.nvec
);
576 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
577 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
578 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
581 /* aliases *******************************************************************/
583 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
584 * there is no alias sets *aliasp to 0. */
585 static int compute_alias(char **aliasp
,
590 const char *s
= config
->alias
, *t
, *expansion
, *part
;
591 int c
, used_db
= 0, slash_prefix
, err
;
593 const char *const root
= find_track_root(track
);
596 /* Bodge for tracks with no root */
601 dynstr_append_string(&d
, root
);
602 while((c
= (unsigned char)*s
++)) {
604 dynstr_append(&d
, c
);
607 if((slash_prefix
= (*s
== '/')))
610 assert(t
!= 0); /* validated at startup */
611 part
= xstrndup(s
, t
- s
);
612 expansion
= getpart(track
, "display", part
, p
, &used_db
);
614 if(slash_prefix
) dynstr_append(&d
, '/');
615 dynstr_append_string(&d
, expansion
);
617 s
= t
+ 1; /* skip {part} */
619 /* only admit to the alias if we used the db... */
624 dynstr_terminate(&d
);
625 /* ...and the answer differs from the original... */
626 if(!strcmp(track
, d
.vec
)) {
630 /* ...and there isn't already a different track with that name (including as
632 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
634 if((s
= kvp_get(at
, "_alias_for"))
635 && !strcmp(s
, track
)) {
647 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
648 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
649 * Always sets the return values, even if only to null pointers. */
650 static int gettrackdata(const char *track
,
653 const char **actualp
,
655 #define GTD_NOALIAS 0x0001
658 const char *actual
= track
;
659 struct kvp
*t
= 0, *p
= 0;
661 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
662 if((actual
= kvp_get(t
, "_alias_for"))) {
663 if(flags
& GTD_NOALIAS
) {
664 error(0, "alias passed to gettrackdata where real path required");
667 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
672 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
677 if(actualp
) *actualp
= actual
;
683 /* trackdb_notice() **********************************************************/
685 /** @brief notice a possiby new track
686 * @return @c DB_NOTFOUND if new, 0 if already known
688 int trackdb_notice(const char *track
,
694 tid
= trackdb_begin_transaction();
695 err
= trackdb_notice_tid(track
, path
, tid
);
696 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
699 trackdb_abort_transaction(tid
);
701 trackdb_commit_transaction(tid
);
705 /** @brief notice a possiby new track
706 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
708 int trackdb_notice_tid(const char *track
,
712 struct kvp
*t
, *a
, *p
;
716 /* notice whether the tracks.db entry changes */
718 /* get any existing tracks entry */
719 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
721 ret
= err
; /* 0 or DB_NOTFOUND */
722 /* this is a real track */
723 t_changed
+= kvp_set(&t
, "_alias_for", 0);
724 t_changed
+= kvp_set(&t
, "_path", path
);
725 /* if we have an alias record it in the database */
726 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
728 /* won't overwrite someone else's alias as compute_alias() checks */
729 D(("%s: alias %s", track
, alias
));
731 kvp_set(&a
, "_alias_for", track
);
732 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
734 /* update search.db */
735 w
= track_to_words(track
, p
);
736 for(n
= 0; w
[n
]; ++n
)
737 if((err
= register_search_word(track
, w
[n
], tid
)))
740 w
= parsetags(kvp_get(p
, "tags"));
741 for(n
= 0; w
[n
]; ++n
)
742 if((err
= register_tag(track
, w
[n
], tid
)))
745 /* only store the tracks.db entry if it has changed */
746 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
748 if(ret
== DB_NOTFOUND
) {
749 uint32_t timestamp
[2];
754 timestamp
[0] = htonl((uint64_t)now
>> 32);
755 timestamp
[1] = htonl((uint32_t)now
);
756 memset(&key
, 0, sizeof key
);
757 key
.data
= timestamp
;
758 key
.size
= sizeof timestamp
;
759 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
760 make_key(&data
, track
), 0)) {
762 case DB_LOCK_DEADLOCK
: return err
;
763 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
769 /* trackdb_obsolete() ********************************************************/
771 /* obsolete a track */
772 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
777 if((err
= gettrackdata(track
, 0, &p
, 0,
778 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
780 else if(err
== DB_NOTFOUND
) return 0;
781 /* compute the alias, if any, and delete it */
782 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
784 /* if the alias points to some other track then compute_alias won't
786 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
789 /* update search.db */
790 w
= track_to_words(track
, p
);
791 for(n
= 0; w
[n
]; ++n
)
792 if(trackdb_delkeydata(trackdb_searchdb
,
793 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
796 w
= parsetags(kvp_get(p
, "tags"));
797 for(n
= 0; w
[n
]; ++n
)
798 if(trackdb_delkeydata(trackdb_tagsdb
,
799 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
802 /* update tracks.db */
803 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
805 /* We don't delete the prefs, so they survive temporary outages of the
806 * (possibly virtual) track filesystem */
810 /* trackdb_stats() ***********************************************************/
812 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
813 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
815 static const struct statinfo
{
818 } statinfo_hash
[] = {
834 }, statinfo_btree
[] = {
855 /* look up stats for DB */
856 static int get_stats(struct vector
*v
,
858 const struct statinfo
*si
,
867 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
870 case DB_LOCK_DEADLOCK
:
871 error(0, "error querying database: %s", db_strerror(err
));
874 fatal(0, "error querying database: %s", db_strerror(err
));
876 for(n
= 0; n
< nsi
; ++n
) {
877 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
878 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
879 vector_append(v
, str
);
885 struct search_entry
{
890 /* find the top COUNT words in the search database */
891 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
892 struct search_entry
*se
;
895 int err
, n
= 0, nse
= 0, i
;
900 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
901 se
= xmalloc(count
* sizeof *se
);
902 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
904 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
907 #define FINALIZE() do { \
908 if(word && (nse < count || n > se[nse - 1].n)) { \
913 while(i > 0 && n > se[i - 1].n) \
915 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
921 word
= xstrndup(k
.data
, wl
= k
.size
);
929 case DB_LOCK_DEADLOCK
:
930 error(0, "error querying search database: %s", db_strerror(err
));
933 fatal(0, "error querying search database: %s", db_strerror(err
));
935 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
938 byte_xasprintf(&str
, "Top %d search words:", nse
);
939 vector_append(v
, str
);
940 for(i
= 0; i
< nse
; ++i
) {
941 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
942 vector_append(v
, str
);
947 #define SI(what) statinfo_##what, \
948 sizeof statinfo_##what / sizeof (struct statinfo)
950 /* return a list of database stats */
951 char **trackdb_stats(int *nstatsp
) {
958 tid
= trackdb_begin_transaction();
960 vector_append(&v
, (char *)"Tracks database stats:");
961 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
962 vector_append(&v
, (char *)"");
963 vector_append(&v
, (char *)"Search database stats:");
964 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
965 vector_append(&v
, (char *)"");
966 vector_append(&v
, (char *)"Prefs database stats:");
967 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
968 vector_append(&v
, (char *)"");
969 if(search_league(&v
, 10, tid
)) goto fail
;
970 vector_append(&v
, (char *)"");
971 vector_append(&v
, (char *)"Server stats:");
972 byte_xasprintf(&s
, "track lookup cache hits: %lu", cache_files_hits
);
973 vector_append(&v
, (char *)s
);
974 byte_xasprintf(&s
, "track lookup cache misses: %lu", cache_files_misses
);
975 vector_append(&v
, (char *)s
);
976 vector_terminate(&v
);
979 trackdb_abort_transaction(tid
);
981 trackdb_commit_transaction(tid
);
982 if(nstatsp
) *nstatsp
= v
.nvec
;
986 /* set a pref (remove if value=0) */
987 int trackdb_set(const char *track
,
990 struct kvp
*t
, *p
, *a
;
993 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
996 /* TODO: if value matches default then set value=0 */
1000 tid
= trackdb_begin_transaction();
1001 if((err
= gettrackdata(track
, &t
, &p
, 0,
1002 0, tid
)) == DB_LOCK_DEADLOCK
)
1004 if(err
== DB_NOTFOUND
) break;
1005 if(name
[0] == '_') {
1006 if(kvp_set(&t
, name
, value
))
1007 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1010 /* get the old alias name */
1011 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1012 /* get the old tags */
1013 if(!strcmp(name
, "tags"))
1014 oldtags
= parsetags(kvp_get(p
, "tags"));
1016 if(kvp_set(&p
, name
, value
))
1017 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1019 /* compute the new alias name */
1020 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1021 /* check whether alias has changed */
1022 if(!(oldalias
== newalias
1023 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1024 /* adjust alias records to fit change */
1026 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1029 kvp_set(&a
, "_alias_for", track
);
1030 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1033 /* check whether tags have changed */
1034 if(!strcmp(name
, "tags")) {
1035 newtags
= parsetags(value
);
1036 while(*oldtags
|| *newtags
) {
1037 if(*oldtags
&& *newtags
) {
1038 cmp
= strcmp(*oldtags
, *newtags
);
1040 /* keeping this tag */
1044 /* old tag fits into a gap in the new list, so delete old */
1047 /* new tag fits into a gap in the old list, so insert new */
1049 } else if(*oldtags
) {
1050 /* we've run out of new tags, so remaining old ones are to be
1053 if(trackdb_delkeydata(trackdb_tagsdb
,
1054 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1058 /* we've run out of old tags, so remainig new ones are to be
1061 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1071 trackdb_abort_transaction(tid
);
1073 trackdb_commit_transaction(tid
);
1074 return err
== 0 ?
0 : -1;
1078 const char *trackdb_get(const char *track
,
1080 return kvp_get(trackdb_get_all(track
), name
);
1083 /* get all prefs as a 0-terminated array */
1084 struct kvp
*trackdb_get_all(const char *track
) {
1085 struct kvp
*t
, *p
, **pp
;
1089 tid
= trackdb_begin_transaction();
1090 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1094 trackdb_abort_transaction(tid
);
1096 trackdb_commit_transaction(tid
);
1097 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1104 const char *trackdb_resolve(const char *track
) {
1109 tid
= trackdb_begin_transaction();
1110 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1114 trackdb_abort_transaction(tid
);
1116 trackdb_commit_transaction(tid
);
1120 int trackdb_isalias(const char *track
) {
1121 const char *actual
= trackdb_resolve(track
);
1123 return strcmp(actual
, track
);
1126 /* test whether a track exists (perhaps an alias) */
1127 int trackdb_exists(const char *track
) {
1132 tid
= trackdb_begin_transaction();
1133 /* unusually, here we want the return value */
1134 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1138 trackdb_abort_transaction(tid
);
1140 trackdb_commit_transaction(tid
);
1144 /* return the list of tags */
1145 char **trackdb_alltags(void) {
1151 tid
= trackdb_begin_transaction();
1152 err
= trackdb_alltags_tid(tid
, &taglist
);
1154 trackdb_abort_transaction(tid
);
1156 trackdb_commit_transaction(tid
);
1160 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1167 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1168 memset(&k
, 0, sizeof k
);
1169 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1170 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1174 case DB_LOCK_DEADLOCK
:
1177 fatal(0, "c->c_get: %s", db_strerror(err
));
1179 if((err
= trackdb_closecursor(c
))) return err
;
1180 vector_terminate(&v
);
1185 /* return 1 iff sorted tag lists A and B have at least one member in common */
1186 static int tag_intersection(char **a
, char **b
) {
1189 /* Same sort of logic as trackdb_set() above */
1191 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1192 else if(cmp
< 0) ++a
;
1198 /* Check whether a track is suitable for random play. Returns 0 if it is,
1199 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1201 static int check_suitable(const char *track
,
1203 char **required_tags
,
1204 char **prohibited_tags
) {
1208 const char *pick_at_random
, *played_time
;
1210 /* don't pick tracks that aren't in any surviving collection (for instance
1211 * you've edited the config but the rescan hasn't done its job yet) */
1212 if(!find_track_root(track
)) {
1213 info("found track not in any collection: %s", track
);
1216 /* don't pick aliases - only pick the canonical form */
1217 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1218 return DB_LOCK_DEADLOCK
;
1219 if(kvp_get(t
, "_alias_for"))
1221 /* check that random play is not suppressed for this track */
1222 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1223 && !strcmp(pick_at_random
, "0"))
1225 /* don't pick a track that's been played in the last 8 hours */
1226 if((played_time
= kvp_get(p
, "played_time"))) {
1227 last
= atoll(played_time
);
1229 if(now
< last
+ 8 * 3600) /* TODO configurable */
1232 track_tags
= parsetags(kvp_get(p
, "tags"));
1233 /* check that no prohibited tag is present for this track */
1234 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1236 /* check that at least one required tags is present for this track */
1237 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1242 /* attempt to pick a random non-alias track */
1243 const char *trackdb_random(int tries
) {
1248 const char *track
, *candidate
;
1251 char **required_tags
, **prohibited_tags
, **tp
;
1256 tid
= trackdb_begin_transaction();
1257 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1259 required_tags
= parsetags(tags
);
1260 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1262 prohibited_tags
= parsetags(tags
);
1264 if(*required_tags
) {
1265 /* Bung all the suitable tracks into a hash and convert to a list of keys
1266 * (to eliminate duplicates). We cache this list since it is possible
1267 * that it will be very large. */
1270 for(tp
= required_tags
; *tp
; ++tp
) {
1271 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1272 memset(&key
, 0, sizeof key
);
1274 key
.size
= strlen(*tp
);
1276 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1278 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1279 HASH_INSERT_OR_REPLACE
);
1281 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1287 case DB_LOCK_DEADLOCK
:
1290 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1292 trackdb_closecursor(c
);
1295 error(0, "required tag %s does not match any tracks", *tp
);
1297 nreqtracks
= hash_count(h
);
1298 reqtracks
= hash_keys(h
);
1300 while(nreqtracks
&& !track
&& tries
-- > 0) {
1301 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1302 candidate
= reqtracks
[r
];
1303 switch(check_suitable(candidate
, tid
,
1304 required_tags
, prohibited_tags
)) {
1310 case DB_LOCK_DEADLOCK
:
1315 /* No required tags. We pick random record numbers in the database
1317 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1320 case DB_LOCK_DEADLOCK
:
1321 error(0, "error querying tracks.db: %s", db_strerror(err
));
1324 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1327 error(0, "cannot pick tracks at random from an empty database");
1328 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1329 /* record numbers count from 1 upwards */
1330 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1331 memset(&key
, sizeof key
, 0);
1332 key
.flags
= DB_DBT_MALLOC
;
1333 key
.size
= sizeof r
;
1335 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1339 case DB_LOCK_DEADLOCK
:
1340 error(0, "error querying tracks.db: %s", db_strerror(err
));
1343 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1345 candidate
= xstrndup(key
.data
, key
.size
);
1346 switch(check_suitable(candidate
, tid
,
1347 required_tags
, prohibited_tags
)) {
1353 case DB_LOCK_DEADLOCK
:
1360 trackdb_closecursor(c
);
1362 trackdb_abort_transaction(tid
);
1364 trackdb_commit_transaction(tid
);
1366 error(0, "could not pick a random track");
1370 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1371 * from the prefs. */
1372 static const char *getpart(const char *track
,
1373 const char *context
,
1375 const struct kvp
*p
,
1380 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1381 if((result
= kvp_get(p
, pref
)))
1384 result
= trackname_part(track
, context
, part
);
1385 assert(result
!= 0);
1389 /* get a track name part, like trackname_part(), but taking the database into
1391 const char *trackdb_getpart(const char *track
,
1392 const char *context
,
1400 /* construct the full pref */
1401 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1403 tid
= trackdb_begin_transaction();
1404 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1408 trackdb_abort_transaction(tid
);
1410 trackdb_commit_transaction(tid
);
1411 return getpart(actual
, context
, part
, p
, &used_db
);
1414 /* get the raw path name for @track@ (might be an alias) */
1415 const char *trackdb_rawpath(const char *track
) {
1421 tid
= trackdb_begin_transaction();
1422 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1426 trackdb_abort_transaction(tid
);
1428 trackdb_commit_transaction(tid
);
1429 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1433 /* trackdb_list **************************************************************/
1435 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1436 * readable at some point */
1438 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1439 * If RE is a null pointer then it matches everything. */
1440 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1448 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1449 case PCRE_ERROR_NOMATCH
: return 0;
1452 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1459 static int do_list(struct vector
*v
, const char *dir
,
1460 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1466 size_t l
, last_dir_len
= 0;
1467 char *last_dir
= 0, *track
, *alias
;
1471 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1474 /* find the first key >= dir */
1475 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1476 /* keep going while we're dealing with <dir/anything> */
1479 && ((char *)k
.data
)[dl
] == '/'
1480 && !memcmp(k
.data
, dir
, dl
)) {
1481 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1483 /* we have <dir/component/anything>, so <dir/component> is a directory */
1484 l
= ptr
- (char *)k
.data
;
1485 if(what
& trackdb_directories
)
1487 && l
== last_dir_len
1488 && !memcmp(last_dir
, k
.data
, l
))) {
1489 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1490 if(track_matches(dl
, k
.data
, l
, re
))
1491 vector_append(v
, last_dir
);
1494 /* found a plain file */
1495 if((what
& trackdb_files
)) {
1496 track
= xstrndup(k
.data
, k
.size
);
1497 if((err
= trackdb_getdata(trackdb_prefsdb
,
1498 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1500 /* if this file has an alias in the same directory then we skip it */
1501 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1503 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1504 if(track_matches(dl
, k
.data
, k
.size
, re
))
1505 vector_append(v
, track
);
1508 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1516 case DB_LOCK_DEADLOCK
:
1517 error(0, "error querying database: %s", db_strerror(err
));
1520 fatal(0, "error querying database: %s", db_strerror(err
));
1523 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1527 /* return the directories or files below @dir@ */
1528 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1536 tid
= trackdb_begin_transaction();
1539 if(do_list(&v
, dir
, what
, re
, tid
))
1542 for(n
= 0; n
< config
->collection
.n
; ++n
)
1543 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1548 trackdb_abort_transaction(tid
);
1550 trackdb_commit_transaction(tid
);
1551 vector_terminate(&v
);
1557 /* If S is tag:something, return something. Else return 0. */
1558 static const char *checktag(const char *s
) {
1559 if(!strncmp(s
, "tag:", 4))
1565 /* return a list of tracks containing all of the words given. If you
1566 * ask for only stopwords you get no tracks. */
1567 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1568 const char **w
, *best
= 0, *tag
;
1569 char **twords
, **tags
;
1570 int i
, j
, n
, err
, what
;
1580 *ntracks
= 0; /* for early returns */
1581 /* casefold all the words */
1582 w
= xmalloc(nwordlist
* sizeof (char *));
1583 for(n
= 0; n
< nwordlist
; ++n
) {
1584 w
[n
] = casefold(wordlist
[n
]);
1585 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1587 /* find the longest non-stopword */
1588 for(n
= 0; n
< nwordlist
; ++n
)
1589 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1590 if(!best
|| strlen(w
[n
]) > strlen(best
))
1592 /* TODO: we should at least in principal be able to identify the word or tag
1593 * with the least matches in log time, and choose that as our primary search
1595 if(ntags
&& !best
) {
1596 /* Only tags are listed. We limit to the first and narrow down with the
1598 best
= checktag(w
[0]);
1599 db
= trackdb_tagsdb
;
1602 /* We can limit to some word. */
1603 db
= trackdb_searchdb
;
1606 /* Only stopwords */
1612 tid
= trackdb_begin_transaction();
1613 /* find all the tracks that have that word */
1618 cursor
= trackdb_opencursor(db
, tid
);
1619 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1620 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1627 case DB_LOCK_DEADLOCK
:
1628 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1631 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1633 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1635 /* do a naive search over that (hopefuly fairly small) list of tracks */
1637 for(n
= 0; n
< v
.nvec
; ++n
) {
1638 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1641 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1644 twords
= track_to_words(v
.vec
[n
], p
);
1645 tags
= parsetags(kvp_get(p
, "tags"));
1646 for(i
= 0; i
< nwordlist
; ++i
) {
1647 if((tag
= checktag(w
[i
]))) {
1648 /* Track must have this tag */
1649 for(j
= 0; tags
[j
]; ++j
)
1650 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1651 if(!tags
[j
]) break; /* tag not found */
1653 /* Track must contain this word */
1654 for(j
= 0; twords
[j
]; ++j
)
1655 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1656 if(!twords
[j
]) break; /* word not found */
1659 if(i
>= nwordlist
) /* all words found */
1660 vector_append(&u
, v
.vec
[n
]);
1664 trackdb_closecursor(cursor
);
1666 trackdb_abort_transaction(tid
);
1667 info("retrying search");
1669 trackdb_commit_transaction(tid
);
1670 vector_terminate(&u
);
1676 /* trackdb_scan **************************************************************/
1678 int trackdb_scan(const char *root
,
1679 int (*callback
)(const char *track
,
1687 const size_t root_len
= root ?
strlen(root
) : 0;
1692 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1694 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1697 memset(&k
, 0, sizeof k
);
1698 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1703 || (k
.size
> root_len
1704 && !strncmp(k
.data
, root
, root_len
)
1705 && ((char *)k
.data
)[root_len
] == '/')) {
1706 data
= kvp_urldecode(d
.data
, d
.size
);
1707 if(kvp_get(data
, "_path")) {
1708 track
= xstrndup(k
.data
, k
.size
);
1709 /* Advance to the next track before the callback so that the callback
1710 * may safely delete the track */
1711 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1712 if((cberr
= callback(track
, data
, u
, tid
))) {
1717 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1721 trackdb_closecursor(cursor
);
1728 case DB_LOCK_DEADLOCK
:
1729 error(0, "c->c_get: %s", db_strerror(err
));
1732 fatal(0, "c->c_get: %s", db_strerror(err
));
1736 /* trackdb_rescan ************************************************************/
1738 /* called when the rescanner terminates */
1739 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1742 const struct rusage
attribute((unused
)) *rusage
,
1743 void attribute((unused
)) *u
) {
1744 if(pid
== rescan_pid
) rescan_pid
= -1;
1746 error(0, "disorderd-rescan: %s", wstat(status
));
1748 D(("disorderd-rescan terminate: %s", wstat(status
)));
1749 /* Our cache of file lookups is out of date now */
1750 cache_clean(&cache_files_type
);
1751 eventlog("rescanned", (char *)0);
1755 void trackdb_rescan(ev_source
*ev
) {
1756 if(rescan_pid
!= -1) {
1757 error(0, "rescan already underway");
1760 rescan_pid
= subprogram(ev
, RESCAN
);
1761 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1762 D(("started rescanner"));
1766 int trackdb_rescan_cancel(void) {
1767 if(rescan_pid
== -1) return 0;
1768 if(kill(rescan_pid
, SIGTERM
) < 0)
1769 fatal(errno
, "error killing rescanner");
1774 /* global prefs **************************************************************/
1776 void trackdb_set_global(const char *name
,
1784 memset(&k
, 0, sizeof k
);
1785 memset(&d
, 0, sizeof d
);
1786 k
.data
= (void *)name
;
1787 k
.size
= strlen(name
);
1789 d
.data
= (void *)value
;
1790 d
.size
= strlen(value
);
1793 tid
= trackdb_begin_transaction();
1795 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1797 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1798 if(!err
|| err
== DB_NOTFOUND
) break;
1799 if(err
!= DB_LOCK_DEADLOCK
)
1800 fatal(0, "error updating database: %s", db_strerror(err
));
1801 trackdb_abort_transaction(tid
);
1803 trackdb_commit_transaction(tid
);
1804 /* log important state changes */
1805 if(!strcmp(name
, "playing")) {
1806 state
= !value
|| !strcmp(value
, "yes");
1807 info("playing %s by %s",
1808 state ?
"enabled" : "disabled",
1810 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1812 if(!strcmp(name
, "random-play")) {
1813 state
= !value
|| !strcmp(value
, "yes");
1814 info("random play %s by %s",
1815 state ?
"enabled" : "disabled",
1817 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1819 if(!strcmp(name
, "required-tags"))
1823 const char *trackdb_get_global(const char *name
) {
1829 tid
= trackdb_begin_transaction();
1830 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1832 trackdb_abort_transaction(tid
);
1834 trackdb_commit_transaction(tid
);
1838 static int trackdb_get_global_tid(const char *name
,
1844 memset(&k
, 0, sizeof k
);
1845 k
.data
= (void *)name
;
1846 k
.size
= strlen(name
);
1847 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1848 prepare_data(&d
), 0)) {
1850 *rp
= xstrndup(d
.data
, d
.size
);
1855 case DB_LOCK_DEADLOCK
:
1858 fatal(0, "error updating database: %s", db_strerror(err
));
1862 /** @brief Retrieve the most recently added tracks
1863 * @param ntracksp Where to put count, or 0
1864 * @param maxtracks Maximum number of tracks to retrieve
1865 * @return null-terminated array of track names
1867 * The most recently added track is first in the array.
1869 char **trackdb_new(int *ntracksp
,
1875 tid
= trackdb_begin_transaction();
1876 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1879 trackdb_abort_transaction(tid
);
1881 trackdb_commit_transaction(tid
);
1885 /** @brief Retrieve the most recently added tracks
1886 * @param ntracksp Where to put count, or 0
1887 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1888 * @param tid Transaction ID
1889 * @return null-terminated array of track names, or NULL on deadlock
1891 * The most recently added track is first in the array.
1893 static char **trackdb_new_tid(int *ntracksp
,
1899 struct vector tracks
[1];
1901 vector_init(tracks
);
1902 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1903 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1904 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1905 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1907 case 0: /* hit maxtracks */
1908 case DB_NOTFOUND
: /* ran out of tracks */
1910 case DB_LOCK_DEADLOCK
:
1911 trackdb_closecursor(c
);
1914 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
1916 if((err
= trackdb_closecursor(c
)))
1917 return 0; /* deadlock */
1918 vector_terminate(tracks
);
1920 *ntracksp
= tracks
->nvec
;
1924 /* tidying up ****************************************************************/
1926 void trackdb_gc(void) {
1930 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
1931 config
->checkpoint_kbyte
,
1932 config
->checkpoint_min
,
1934 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
1935 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
1936 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
1937 /* This makes catastrophic recovery impossible. However, the user can still
1938 * preserve the important data by using disorder-dump to snapshot their
1939 * prefs, and later to restore it. This is likely to have much small
1940 * long-term storage requirements than record the db logfiles. */
1948 indent-tabs-mode:nil