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>
45 #include "configuration.h"
51 #include "trackname.h"
52 #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 int trackdb_get_global_tid(const char *name
,
70 static char **trackdb_new_tid(int *ntracksp
,
73 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
75 const struct cache_type cache_files_type
= { 86400 };
76 unsigned long cache_files_hits
, cache_files_misses
;
78 /* setup and teardown ********************************************************/
80 static const char *home
; /* home had better not change */
81 DB_ENV
*trackdb_env
; /* db environment */
82 DB
*trackdb_tracksdb
; /* the db itself */
83 DB
*trackdb_prefsdb
; /* preferences */
84 DB
*trackdb_searchdb
; /* the search database */
85 DB
*trackdb_tagsdb
; /* the tags database */
86 DB
*trackdb_globaldb
; /* global preferences */
87 DB
*trackdb_noticeddb
; /* when track noticed */
88 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
89 static pid_t rescan_pid
= -1; /* rescanner PID */
90 static int initialized
, opened
; /* state */
92 /* tracks matched by required_tags */
93 static char **reqtracks
;
94 static size_t nreqtracks
;
96 /* comparison function for keys */
97 static int compare(DB
attribute((unused
)) *db_
,
98 const DBT
*a
, const DBT
*b
) {
99 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
102 /* open environment */
103 void trackdb_init(int recover
) {
105 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
108 assert(initialized
== 0);
111 if(strcmp(home
, config
->home
))
112 fatal(0, "cannot change db home without server restart");
116 /* create environment */
117 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
119 if((err
= trackdb_env
->set_alloc(trackdb_env
,
120 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
121 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
122 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
123 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
124 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
125 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
126 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
132 |recover_type
[recover
],
134 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
135 trackdb_env
->set_errpfx(trackdb_env
, "DB");
136 trackdb_env
->set_errfile(trackdb_env
, stderr
);
137 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
138 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
139 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
140 D(("initialized database environment"));
143 /* called when deadlock manager terminates */
144 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
145 pid_t
attribute((unused
)) pid
,
147 const struct rusage
attribute((unused
)) *rusage
,
148 void attribute((unused
)) *u
) {
149 db_deadlock_pid
= -1;
151 fatal(0, "deadlock manager unexpectedly terminated: %s",
154 D(("deadlock manager terminated: %s", wstat(status
)));
158 static pid_t
subprogram(ev_source
*ev
, const char *prog
,
162 /* If we're in the background then trap subprocess stdout/stderr */
163 if(!(pid
= xfork())) {
166 ev_signal_atfork(ev
);
167 signal(SIGPIPE
, SIG_DFL
);
172 /* If we were negatively niced, undo it. We don't bother checking for
173 * error, it's not that important. */
174 setpriority(PRIO_PROCESS
, 0, 0);
175 execlp(prog
, prog
, "--config", configfile
,
176 debugging ?
"--debug" : "--no-debug",
177 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
179 fatal(errno
, "error invoking %s", prog
);
184 /* start deadlock manager */
185 void trackdb_master(ev_source
*ev
) {
186 assert(db_deadlock_pid
== -1);
187 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
188 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
189 D(("started deadlock manager"));
192 /* close environment */
193 void trackdb_deinit(void) {
197 assert(initialized
== 1);
200 /* close the environment */
201 if((err
= trackdb_env
->close(trackdb_env
, 0)))
202 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
204 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
205 fatal(errno
, "error killing rescanner");
207 /* terminate the deadlock manager */
208 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
209 fatal(errno
, "error killing deadlock manager");
210 db_deadlock_pid
= -1;
212 D(("deinitialized database environment"));
215 /* open a specific database */
216 static DB
*open_db(const char *path
,
224 D(("open %s", path
));
225 path
= config_get_file(path
);
226 if((err
= db_create(&db
, trackdb_env
, 0)))
227 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
229 if((err
= db
->set_flags(db
, dbflags
)))
230 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
231 if(dbtype
== DB_BTREE
)
232 if((err
= db
->set_bt_compare(db
, compare
)))
233 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
234 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
235 openflags
| DB_AUTO_COMMIT
, mode
)))
236 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
240 /* open track databases */
241 void trackdb_open(void) {
245 /* open the databases */
246 trackdb_tracksdb
= open_db("tracks.db",
247 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
248 trackdb_searchdb
= open_db("search.db",
249 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
250 trackdb_tagsdb
= open_db("tags.db",
251 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
252 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
253 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
254 trackdb_noticeddb
= open_db("noticed.db",
255 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
256 D(("opened databases"));
259 /* close track databases */
260 void trackdb_close(void) {
266 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
267 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
268 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
269 fatal(0, "error closing search.db: %s", db_strerror(err
));
270 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
271 fatal(0, "error closing tags.db: %s", db_strerror(err
));
272 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
273 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
274 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
275 fatal(0, "error closing global.db: %s", db_strerror(err
));
276 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
277 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
278 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
279 trackdb_tagsdb
= trackdb_globaldb
= 0;
280 D(("closed databases"));
283 /* generic db routines *******************************************************/
285 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
286 * DB_LOCK_DEADLOCK. */
287 int trackdb_getdata(DB
*db
,
294 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
295 prepare_data(&data
), 0)) {
297 *kp
= kvp_urldecode(data
.data
, data
.size
);
302 case DB_LOCK_DEADLOCK
:
303 error(0, "error querying database: %s", db_strerror(err
));
306 fatal(0, "error querying database: %s", db_strerror(err
));
310 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
311 * DB_LOCK_DEADLOCK. */
312 int trackdb_putdata(DB
*db
,
320 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
321 encode_data(&data
, k
), flags
)) {
325 case DB_LOCK_DEADLOCK
:
326 error(0, "error updating database: %s", db_strerror(err
));
329 fatal(0, "error updating database: %s", db_strerror(err
));
333 /* delete a database entry */
334 int trackdb_delkey(DB
*db
,
340 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
344 case DB_LOCK_DEADLOCK
:
345 error(0, "error updating database: %s", db_strerror(err
));
348 fatal(0, "error updating database: %s", db_strerror(err
));
352 /* open a database cursor */
353 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
357 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
359 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
364 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
365 int trackdb_closecursor(DBC
*c
) {
369 switch(err
= c
->c_close(c
)) {
372 case DB_LOCK_DEADLOCK
:
373 error(0, "error closing cursor: %s", db_strerror(err
));
376 fatal(0, "error closing cursor: %s", db_strerror(err
));
380 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
381 int trackdb_delkeydata(DB
*db
,
389 c
= trackdb_opencursor(db
, tid
);
390 switch(err
= c
->c_get(c
, make_key(&key
, word
),
391 make_key(&data
, track
), DB_GET_BOTH
)) {
393 switch(err
= c
->c_del(c
, 0)) {
399 case DB_LOCK_DEADLOCK
:
400 error(0, "error updating database: %s", db_strerror(err
));
403 fatal(0, "c->c_del: %s", db_strerror(err
));
408 case DB_LOCK_DEADLOCK
:
409 error(0, "error updating database: %s", db_strerror(err
));
412 fatal(0, "c->c_get: %s", db_strerror(err
));
414 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
418 /* start a transaction */
419 DB_TXN
*trackdb_begin_transaction(void) {
423 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
424 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
428 /* abort transaction */
429 void trackdb_abort_transaction(DB_TXN
*tid
) {
433 if((err
= tid
->abort(tid
)))
434 fatal(0, "tid->abort: %s", db_strerror(err
));
437 /* commit transaction */
438 void trackdb_commit_transaction(DB_TXN
*tid
) {
441 if((err
= tid
->commit(tid
, 0)))
442 fatal(0, "tid->commit: %s", db_strerror(err
));
445 /* search/tags shared code ***************************************************/
447 /* comparison function used by dedupe() */
448 static int wordcmp(const void *a
, const void *b
) {
449 return strcmp(*(const char **)a
, *(const char **)b
);
452 /* sort and de-dupe VEC */
453 static char **dedupe(char **vec
, int nvec
) {
456 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
460 for(n
= 1; n
< nvec
; ++n
)
461 if(strcmp(vec
[n
], vec
[m
- 1]))
468 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
469 static int register_word(DB
*db
, const char *what
,
470 const char *track
, const char *word
,
475 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
476 make_key(&data
, track
), DB_NODUPDATA
)) {
480 case DB_LOCK_DEADLOCK
:
481 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
484 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
488 /* search primitives *********************************************************/
490 /* return true iff NAME is a trackname_display_ pref */
491 static int is_display_pref(const char *name
) {
492 static const char prefix
[] = "trackname_display_";
493 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
496 /* compute the words of a track name */
497 static char **track_to_words(const char *track
,
498 const struct kvp
*p
) {
502 const char *rootless
= track_rootless(track
);
505 rootless
= track
; /* bodge */
507 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
508 vector_append_many(&v
, w
, nw
);
510 for(; p
; p
= p
->next
)
511 if(is_display_pref(p
->name
))
512 if((w
= words(casefold(p
->value
), &nw
)))
513 vector_append_many(&v
, w
, nw
);
514 vector_terminate(&v
);
515 return dedupe(v
.vec
, v
.nvec
);
518 /* return nonzero iff WORD is a stopword */
519 static int stopword(const char *word
) {
522 for(n
= 0; n
< config
->stopword
.n
523 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
525 return n
< config
->stopword
.n
;
528 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
529 static int register_search_word(const char *track
, const char *word
,
531 if(stopword(word
)) return 0;
532 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
535 /* Tags **********************************************************************/
537 /* Return nonzero if C is a valid tag character */
538 static int tagchar(int c
) {
547 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
548 static char **parsetags(const char *s
) {
554 /* skip initial separators */
555 while(*s
&& (!tagchar(*s
) || *s
== ' '))
558 /* find the extent of the tag */
560 while(*s
&& tagchar(*s
))
562 /* strip trailing spaces */
563 while(s
> t
&& s
[-1] == ' ')
565 vector_append(&v
, xstrndup(t
, s
- t
));
566 /* skip intermediate and trailing separators */
567 while(*s
&& (!tagchar(*s
) || *s
== ' '))
571 vector_terminate(&v
);
572 return dedupe(v
.vec
, v
.nvec
);
575 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
576 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
577 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
580 /* aliases *******************************************************************/
582 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
583 * there is no alias sets *aliasp to 0. */
584 static int compute_alias(char **aliasp
,
589 const char *s
= config
->alias
, *t
, *expansion
, *part
;
590 int c
, used_db
= 0, slash_prefix
, err
;
592 const char *const root
= find_track_root(track
);
595 /* Bodge for tracks with no root */
600 dynstr_append_string(&d
, root
);
601 while((c
= (unsigned char)*s
++)) {
603 dynstr_append(&d
, c
);
606 if((slash_prefix
= (*s
== '/')))
609 assert(t
!= 0); /* validated at startup */
610 part
= xstrndup(s
, t
- s
);
611 expansion
= getpart(track
, "display", part
, p
, &used_db
);
613 if(slash_prefix
) dynstr_append(&d
, '/');
614 dynstr_append_string(&d
, expansion
);
616 s
= t
+ 1; /* skip {part} */
618 /* only admit to the alias if we used the db... */
623 dynstr_terminate(&d
);
624 /* ...and the answer differs from the original... */
625 if(!strcmp(track
, d
.vec
)) {
629 /* ...and there isn't already a different track with that name (including as
631 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
633 if((s
= kvp_get(at
, "_alias_for"))
634 && !strcmp(s
, track
)) {
646 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
647 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
648 * Always sets the return values, even if only to null pointers. */
649 static int gettrackdata(const char *track
,
652 const char **actualp
,
654 #define GTD_NOALIAS 0x0001
657 const char *actual
= track
;
658 struct kvp
*t
= 0, *p
= 0;
660 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
661 if((actual
= kvp_get(t
, "_alias_for"))) {
662 if(flags
& GTD_NOALIAS
) {
663 error(0, "alias passed to gettrackdata where real path required");
666 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
671 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
676 if(actualp
) *actualp
= actual
;
682 /* trackdb_notice() **********************************************************/
684 /** @brief notice a possibly new track
685 * @return @c DB_NOTFOUND if new, 0 if already known
687 int trackdb_notice(const char *track
,
693 tid
= trackdb_begin_transaction();
694 err
= trackdb_notice_tid(track
, path
, tid
);
695 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
698 trackdb_abort_transaction(tid
);
700 trackdb_commit_transaction(tid
);
704 /** @brief notice a possibly new track
705 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
707 int trackdb_notice_tid(const char *track
,
711 struct kvp
*t
, *a
, *p
;
715 /* notice whether the tracks.db entry changes */
717 /* get any existing tracks entry */
718 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
720 ret
= err
; /* 0 or DB_NOTFOUND */
721 /* this is a real track */
722 t_changed
+= kvp_set(&t
, "_alias_for", 0);
723 t_changed
+= kvp_set(&t
, "_path", path
);
724 /* if we have an alias record it in the database */
725 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
727 /* won't overwrite someone else's alias as compute_alias() checks */
728 D(("%s: alias %s", track
, alias
));
730 kvp_set(&a
, "_alias_for", track
);
731 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
733 /* update search.db */
734 w
= track_to_words(track
, p
);
735 for(n
= 0; w
[n
]; ++n
)
736 if((err
= register_search_word(track
, w
[n
], tid
)))
739 w
= parsetags(kvp_get(p
, "tags"));
740 for(n
= 0; w
[n
]; ++n
)
741 if((err
= register_tag(track
, w
[n
], tid
)))
744 /* only store the tracks.db entry if it has changed */
745 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
747 if(ret
== DB_NOTFOUND
) {
748 uint32_t timestamp
[2];
753 timestamp
[0] = htonl((uint64_t)now
>> 32);
754 timestamp
[1] = htonl((uint32_t)now
);
755 memset(&key
, 0, sizeof key
);
756 key
.data
= timestamp
;
757 key
.size
= sizeof timestamp
;
758 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
759 make_key(&data
, track
), 0)) {
761 case DB_LOCK_DEADLOCK
: return err
;
762 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
768 /* trackdb_obsolete() ********************************************************/
770 /* obsolete a track */
771 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
776 if((err
= gettrackdata(track
, 0, &p
, 0,
777 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
779 else if(err
== DB_NOTFOUND
) return 0;
780 /* compute the alias, if any, and delete it */
781 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
783 /* if the alias points to some other track then compute_alias won't
785 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
788 /* update search.db */
789 w
= track_to_words(track
, p
);
790 for(n
= 0; w
[n
]; ++n
)
791 if(trackdb_delkeydata(trackdb_searchdb
,
792 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
795 w
= parsetags(kvp_get(p
, "tags"));
796 for(n
= 0; w
[n
]; ++n
)
797 if(trackdb_delkeydata(trackdb_tagsdb
,
798 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
801 /* update tracks.db */
802 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
804 /* We don't delete the prefs, so they survive temporary outages of the
805 * (possibly virtual) track filesystem */
809 /* trackdb_stats() ***********************************************************/
811 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
812 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
814 static const struct statinfo
{
817 } statinfo_hash
[] = {
833 }, statinfo_btree
[] = {
854 /* look up stats for DB */
855 static int get_stats(struct vector
*v
,
857 const struct statinfo
*si
,
866 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
869 case DB_LOCK_DEADLOCK
:
870 error(0, "error querying database: %s", db_strerror(err
));
873 fatal(0, "error querying database: %s", db_strerror(err
));
875 for(n
= 0; n
< nsi
; ++n
) {
876 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
877 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
878 vector_append(v
, str
);
884 struct search_entry
{
889 /* find the top COUNT words in the search database */
890 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
891 struct search_entry
*se
;
894 int err
, n
= 0, nse
= 0, i
;
899 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
900 se
= xmalloc(count
* sizeof *se
);
901 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
903 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
906 #define FINALIZE() do { \
907 if(word && (nse < count || n > se[nse - 1].n)) { \
912 while(i > 0 && n > se[i - 1].n) \
914 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
920 word
= xstrndup(k
.data
, wl
= k
.size
);
928 case DB_LOCK_DEADLOCK
:
929 error(0, "error querying search database: %s", db_strerror(err
));
932 fatal(0, "error querying search database: %s", db_strerror(err
));
934 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
937 byte_xasprintf(&str
, "Top %d search words:", nse
);
938 vector_append(v
, str
);
939 for(i
= 0; i
< nse
; ++i
) {
940 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
941 vector_append(v
, str
);
946 #define SI(what) statinfo_##what, \
947 sizeof statinfo_##what / sizeof (struct statinfo)
949 /* return a list of database stats */
950 char **trackdb_stats(int *nstatsp
) {
956 tid
= trackdb_begin_transaction();
958 vector_append(&v
, (char *)"Tracks database stats:");
959 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
960 vector_append(&v
, (char *)"");
961 vector_append(&v
, (char *)"Search database stats:");
962 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
963 vector_append(&v
, (char *)"");
964 vector_append(&v
, (char *)"Prefs database stats:");
965 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
966 vector_append(&v
, (char *)"");
967 if(search_league(&v
, 10, tid
)) goto fail
;
968 vector_terminate(&v
);
971 trackdb_abort_transaction(tid
);
973 trackdb_commit_transaction(tid
);
974 if(nstatsp
) *nstatsp
= v
.nvec
;
978 struct stats_details
{
979 void (*done
)(char *data
, void *u
);
981 int exited
; /* subprocess exited */
982 int closed
; /* pipe close */
983 int wstat
; /* wait status from subprocess */
984 struct dynstr data
[1]; /* data read from pipe */
987 static void stats_complete(struct stats_details
*d
) {
990 if(!(d
->exited
&& d
->closed
))
992 byte_xasprintf(&s
, "\n"
994 "track lookup cache hits: %lu\n"
995 "track lookup cache misses: %lu\n",
998 dynstr_append_string(d
->data
, s
);
999 dynstr_terminate(d
->data
);
1000 d
->done(d
->data
->vec
, d
->u
);
1003 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1004 pid_t
attribute((unused
)) pid
,
1006 const struct rusage
attribute((unused
)) *rusage
,
1008 struct stats_details
*const d
= u
;
1012 error(0, "disorder-stats %s", wstat(status
));
1017 static int stats_read(ev_source
attribute((unused
)) *ev
,
1023 struct stats_details
*const d
= u
;
1025 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1026 ev_reader_consume(reader
, bytes
);
1033 static int stats_error(ev_source
attribute((unused
)) *ev
,
1036 struct stats_details
*const d
= u
;
1038 error(errno_value
, "error reading from pipe to disorder-stats");
1044 void trackdb_stats_subprocess(ev_source
*ev
,
1045 void (*done
)(char *data
, void *u
),
1049 struct stats_details
*d
= xmalloc(sizeof *d
);
1051 dynstr_init(d
->data
);
1055 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1057 ev_child(ev
, pid
, 0, stats_finished
, d
);
1058 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1061 /* set a pref (remove if value=0) */
1062 int trackdb_set(const char *track
,
1064 const char *value
) {
1065 struct kvp
*t
, *p
, *a
;
1068 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1071 /* TODO: if value matches default then set value=0 */
1075 tid
= trackdb_begin_transaction();
1076 if((err
= gettrackdata(track
, &t
, &p
, 0,
1077 0, tid
)) == DB_LOCK_DEADLOCK
)
1079 if(err
== DB_NOTFOUND
) break;
1080 if(name
[0] == '_') {
1081 if(kvp_set(&t
, name
, value
))
1082 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1085 /* get the old alias name */
1086 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1087 /* get the old tags */
1088 if(!strcmp(name
, "tags"))
1089 oldtags
= parsetags(kvp_get(p
, "tags"));
1091 if(kvp_set(&p
, name
, value
))
1092 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1094 /* compute the new alias name */
1095 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1096 /* check whether alias has changed */
1097 if(!(oldalias
== newalias
1098 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1099 /* adjust alias records to fit change */
1101 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1104 kvp_set(&a
, "_alias_for", track
);
1105 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1108 /* check whether tags have changed */
1109 if(!strcmp(name
, "tags")) {
1110 newtags
= parsetags(value
);
1111 while(*oldtags
|| *newtags
) {
1112 if(*oldtags
&& *newtags
) {
1113 cmp
= strcmp(*oldtags
, *newtags
);
1115 /* keeping this tag */
1119 /* old tag fits into a gap in the new list, so delete old */
1122 /* new tag fits into a gap in the old list, so insert new */
1124 } else if(*oldtags
) {
1125 /* we've run out of new tags, so remaining old ones are to be
1128 if(trackdb_delkeydata(trackdb_tagsdb
,
1129 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1133 /* we've run out of old tags, so remainig new ones are to be
1136 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1146 trackdb_abort_transaction(tid
);
1148 trackdb_commit_transaction(tid
);
1149 return err
== 0 ?
0 : -1;
1153 const char *trackdb_get(const char *track
,
1155 return kvp_get(trackdb_get_all(track
), name
);
1158 /* get all prefs as a 0-terminated array */
1159 struct kvp
*trackdb_get_all(const char *track
) {
1160 struct kvp
*t
, *p
, **pp
;
1164 tid
= trackdb_begin_transaction();
1165 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1169 trackdb_abort_transaction(tid
);
1171 trackdb_commit_transaction(tid
);
1172 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1179 const char *trackdb_resolve(const char *track
) {
1184 tid
= trackdb_begin_transaction();
1185 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1189 trackdb_abort_transaction(tid
);
1191 trackdb_commit_transaction(tid
);
1195 int trackdb_isalias(const char *track
) {
1196 const char *actual
= trackdb_resolve(track
);
1198 return strcmp(actual
, track
);
1201 /* test whether a track exists (perhaps an alias) */
1202 int trackdb_exists(const char *track
) {
1207 tid
= trackdb_begin_transaction();
1208 /* unusually, here we want the return value */
1209 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1213 trackdb_abort_transaction(tid
);
1215 trackdb_commit_transaction(tid
);
1219 /* return the list of tags */
1220 char **trackdb_alltags(void) {
1226 tid
= trackdb_begin_transaction();
1227 err
= trackdb_alltags_tid(tid
, &taglist
);
1229 trackdb_abort_transaction(tid
);
1231 trackdb_commit_transaction(tid
);
1235 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1242 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1243 memset(&k
, 0, sizeof k
);
1244 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1245 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1249 case DB_LOCK_DEADLOCK
:
1252 fatal(0, "c->c_get: %s", db_strerror(err
));
1254 if((err
= trackdb_closecursor(c
))) return err
;
1255 vector_terminate(&v
);
1260 /* return 1 iff sorted tag lists A and B have at least one member in common */
1261 static int tag_intersection(char **a
, char **b
) {
1264 /* Same sort of logic as trackdb_set() above */
1266 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1267 else if(cmp
< 0) ++a
;
1273 /* Check whether a track is suitable for random play. Returns 0 if it is,
1274 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1276 static int check_suitable(const char *track
,
1278 char **required_tags
,
1279 char **prohibited_tags
) {
1283 const char *pick_at_random
, *played_time
;
1285 /* don't pick tracks that aren't in any surviving collection (for instance
1286 * you've edited the config but the rescan hasn't done its job yet) */
1287 if(!find_track_root(track
)) {
1288 info("found track not in any collection: %s", track
);
1291 /* don't pick aliases - only pick the canonical form */
1292 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1293 return DB_LOCK_DEADLOCK
;
1294 if(kvp_get(t
, "_alias_for"))
1296 /* check that random play is not suppressed for this track */
1297 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1298 && !strcmp(pick_at_random
, "0"))
1300 /* don't pick a track that's been played in the last 8 hours */
1301 if((played_time
= kvp_get(p
, "played_time"))) {
1302 last
= atoll(played_time
);
1304 if(now
< last
+ 8 * 3600) /* TODO configurable */
1307 track_tags
= parsetags(kvp_get(p
, "tags"));
1308 /* check that no prohibited tag is present for this track */
1309 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1311 /* check that at least one required tags is present for this track */
1312 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1317 /* attempt to pick a random non-alias track */
1318 const char *trackdb_random(int tries
) {
1323 const char *track
, *candidate
;
1326 char **required_tags
, **prohibited_tags
, **tp
;
1331 tid
= trackdb_begin_transaction();
1332 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1334 required_tags
= parsetags(tags
);
1335 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1337 prohibited_tags
= parsetags(tags
);
1339 if(*required_tags
) {
1340 /* Bung all the suitable tracks into a hash and convert to a list of keys
1341 * (to eliminate duplicates). We cache this list since it is possible
1342 * that it will be very large. */
1345 for(tp
= required_tags
; *tp
; ++tp
) {
1346 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1347 memset(&key
, 0, sizeof key
);
1349 key
.size
= strlen(*tp
);
1351 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1353 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1354 HASH_INSERT_OR_REPLACE
);
1356 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1362 case DB_LOCK_DEADLOCK
:
1365 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1367 trackdb_closecursor(c
);
1370 error(0, "required tag %s does not match any tracks", *tp
);
1372 nreqtracks
= hash_count(h
);
1373 reqtracks
= hash_keys(h
);
1375 while(nreqtracks
&& !track
&& tries
-- > 0) {
1376 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1377 candidate
= reqtracks
[r
];
1378 switch(check_suitable(candidate
, tid
,
1379 required_tags
, prohibited_tags
)) {
1385 case DB_LOCK_DEADLOCK
:
1390 /* No required tags. We pick random record numbers in the database
1392 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1395 case DB_LOCK_DEADLOCK
:
1396 error(0, "error querying tracks.db: %s", db_strerror(err
));
1399 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1402 error(0, "cannot pick tracks at random from an empty database");
1403 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1404 /* record numbers count from 1 upwards */
1405 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1406 memset(&key
, sizeof key
, 0);
1407 key
.flags
= DB_DBT_MALLOC
;
1408 key
.size
= sizeof r
;
1410 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1414 case DB_LOCK_DEADLOCK
:
1415 error(0, "error querying tracks.db: %s", db_strerror(err
));
1418 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1420 candidate
= xstrndup(key
.data
, key
.size
);
1421 switch(check_suitable(candidate
, tid
,
1422 required_tags
, prohibited_tags
)) {
1428 case DB_LOCK_DEADLOCK
:
1435 trackdb_closecursor(c
);
1437 trackdb_abort_transaction(tid
);
1439 trackdb_commit_transaction(tid
);
1441 error(0, "could not pick a random track");
1445 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1446 * from the prefs. */
1447 static const char *getpart(const char *track
,
1448 const char *context
,
1450 const struct kvp
*p
,
1455 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1456 if((result
= kvp_get(p
, pref
)))
1459 result
= trackname_part(track
, context
, part
);
1460 assert(result
!= 0);
1464 /* get a track name part, like trackname_part(), but taking the database into
1466 const char *trackdb_getpart(const char *track
,
1467 const char *context
,
1475 /* construct the full pref */
1476 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1478 tid
= trackdb_begin_transaction();
1479 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1483 trackdb_abort_transaction(tid
);
1485 trackdb_commit_transaction(tid
);
1486 return getpart(actual
, context
, part
, p
, &used_db
);
1489 /* get the raw path name for @track@ (might be an alias) */
1490 const char *trackdb_rawpath(const char *track
) {
1496 tid
= trackdb_begin_transaction();
1497 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1501 trackdb_abort_transaction(tid
);
1503 trackdb_commit_transaction(tid
);
1504 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1508 /* trackdb_list **************************************************************/
1510 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1511 * readable at some point */
1513 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1514 * If RE is a null pointer then it matches everything. */
1515 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1523 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1524 case PCRE_ERROR_NOMATCH
: return 0;
1527 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1534 static int do_list(struct vector
*v
, const char *dir
,
1535 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1541 size_t l
, last_dir_len
= 0;
1542 char *last_dir
= 0, *track
, *alias
;
1546 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1549 /* find the first key >= dir */
1550 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1551 /* keep going while we're dealing with <dir/anything> */
1554 && ((char *)k
.data
)[dl
] == '/'
1555 && !memcmp(k
.data
, dir
, dl
)) {
1556 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1558 /* we have <dir/component/anything>, so <dir/component> is a directory */
1559 l
= ptr
- (char *)k
.data
;
1560 if(what
& trackdb_directories
)
1562 && l
== last_dir_len
1563 && !memcmp(last_dir
, k
.data
, l
))) {
1564 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1565 if(track_matches(dl
, k
.data
, l
, re
))
1566 vector_append(v
, last_dir
);
1569 /* found a plain file */
1570 if((what
& trackdb_files
)) {
1571 track
= xstrndup(k
.data
, k
.size
);
1572 if((err
= trackdb_getdata(trackdb_prefsdb
,
1573 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1575 /* if this file has an alias in the same directory then we skip it */
1576 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1578 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1579 if(track_matches(dl
, k
.data
, k
.size
, re
))
1580 vector_append(v
, track
);
1583 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1591 case DB_LOCK_DEADLOCK
:
1592 error(0, "error querying database: %s", db_strerror(err
));
1595 fatal(0, "error querying database: %s", db_strerror(err
));
1598 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1602 /* return the directories or files below @dir@ */
1603 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1611 tid
= trackdb_begin_transaction();
1614 if(do_list(&v
, dir
, what
, re
, tid
))
1617 for(n
= 0; n
< config
->collection
.n
; ++n
)
1618 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1623 trackdb_abort_transaction(tid
);
1625 trackdb_commit_transaction(tid
);
1626 vector_terminate(&v
);
1632 /* If S is tag:something, return something. Else return 0. */
1633 static const char *checktag(const char *s
) {
1634 if(!strncmp(s
, "tag:", 4))
1640 /* return a list of tracks containing all of the words given. If you
1641 * ask for only stopwords you get no tracks. */
1642 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1643 const char **w
, *best
= 0, *tag
;
1644 char **twords
, **tags
;
1645 int i
, j
, n
, err
, what
;
1655 *ntracks
= 0; /* for early returns */
1656 /* casefold all the words */
1657 w
= xmalloc(nwordlist
* sizeof (char *));
1658 for(n
= 0; n
< nwordlist
; ++n
) {
1659 w
[n
] = casefold(wordlist
[n
]);
1660 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1662 /* find the longest non-stopword */
1663 for(n
= 0; n
< nwordlist
; ++n
)
1664 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1665 if(!best
|| strlen(w
[n
]) > strlen(best
))
1667 /* TODO: we should at least in principal be able to identify the word or tag
1668 * with the least matches in log time, and choose that as our primary search
1670 if(ntags
&& !best
) {
1671 /* Only tags are listed. We limit to the first and narrow down with the
1673 best
= checktag(w
[0]);
1674 db
= trackdb_tagsdb
;
1677 /* We can limit to some word. */
1678 db
= trackdb_searchdb
;
1681 /* Only stopwords */
1687 tid
= trackdb_begin_transaction();
1688 /* find all the tracks that have that word */
1693 cursor
= trackdb_opencursor(db
, tid
);
1694 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1695 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1702 case DB_LOCK_DEADLOCK
:
1703 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1706 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1708 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1710 /* do a naive search over that (hopefuly fairly small) list of tracks */
1712 for(n
= 0; n
< v
.nvec
; ++n
) {
1713 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1716 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1719 twords
= track_to_words(v
.vec
[n
], p
);
1720 tags
= parsetags(kvp_get(p
, "tags"));
1721 for(i
= 0; i
< nwordlist
; ++i
) {
1722 if((tag
= checktag(w
[i
]))) {
1723 /* Track must have this tag */
1724 for(j
= 0; tags
[j
]; ++j
)
1725 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1726 if(!tags
[j
]) break; /* tag not found */
1728 /* Track must contain this word */
1729 for(j
= 0; twords
[j
]; ++j
)
1730 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1731 if(!twords
[j
]) break; /* word not found */
1734 if(i
>= nwordlist
) /* all words found */
1735 vector_append(&u
, v
.vec
[n
]);
1739 trackdb_closecursor(cursor
);
1741 trackdb_abort_transaction(tid
);
1742 info("retrying search");
1744 trackdb_commit_transaction(tid
);
1745 vector_terminate(&u
);
1751 /* trackdb_scan **************************************************************/
1753 int trackdb_scan(const char *root
,
1754 int (*callback
)(const char *track
,
1762 const size_t root_len
= root ?
strlen(root
) : 0;
1767 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1769 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1772 memset(&k
, 0, sizeof k
);
1773 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1778 || (k
.size
> root_len
1779 && !strncmp(k
.data
, root
, root_len
)
1780 && ((char *)k
.data
)[root_len
] == '/')) {
1781 data
= kvp_urldecode(d
.data
, d
.size
);
1782 if(kvp_get(data
, "_path")) {
1783 track
= xstrndup(k
.data
, k
.size
);
1784 /* Advance to the next track before the callback so that the callback
1785 * may safely delete the track */
1786 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1787 if((cberr
= callback(track
, data
, u
, tid
))) {
1792 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1796 trackdb_closecursor(cursor
);
1803 case DB_LOCK_DEADLOCK
:
1804 error(0, "c->c_get: %s", db_strerror(err
));
1807 fatal(0, "c->c_get: %s", db_strerror(err
));
1811 /* trackdb_rescan ************************************************************/
1813 /* called when the rescanner terminates */
1814 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1817 const struct rusage
attribute((unused
)) *rusage
,
1818 void attribute((unused
)) *u
) {
1819 if(pid
== rescan_pid
) rescan_pid
= -1;
1821 error(0, RESCAN
": %s", wstat(status
));
1823 D((RESCAN
" terminated: %s", wstat(status
)));
1824 /* Our cache of file lookups is out of date now */
1825 cache_clean(&cache_files_type
);
1826 eventlog("rescanned", (char *)0);
1830 void trackdb_rescan(ev_source
*ev
) {
1833 if(rescan_pid
!= -1) {
1834 error(0, "rescan already underway");
1837 rescan_pid
= subprogram(ev
, RESCAN
, -1);
1839 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1840 D(("started rescanner"));
1842 /* This is the first rescan, we block until it is complete */
1843 while(waitpid(rescan_pid
, &w
, 0) < 0 && errno
== EINTR
)
1845 reap_rescan(0, rescan_pid
, w
, 0, 0);
1849 int trackdb_rescan_cancel(void) {
1850 if(rescan_pid
== -1) return 0;
1851 if(kill(rescan_pid
, SIGTERM
) < 0)
1852 fatal(errno
, "error killing rescanner");
1857 /* global prefs **************************************************************/
1859 void trackdb_set_global(const char *name
,
1867 memset(&k
, 0, sizeof k
);
1868 memset(&d
, 0, sizeof d
);
1869 k
.data
= (void *)name
;
1870 k
.size
= strlen(name
);
1872 d
.data
= (void *)value
;
1873 d
.size
= strlen(value
);
1876 tid
= trackdb_begin_transaction();
1878 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1880 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1881 if(!err
|| err
== DB_NOTFOUND
) break;
1882 if(err
!= DB_LOCK_DEADLOCK
)
1883 fatal(0, "error updating database: %s", db_strerror(err
));
1884 trackdb_abort_transaction(tid
);
1886 trackdb_commit_transaction(tid
);
1887 /* log important state changes */
1888 if(!strcmp(name
, "playing")) {
1889 state
= !value
|| !strcmp(value
, "yes");
1890 info("playing %s by %s",
1891 state ?
"enabled" : "disabled",
1893 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1895 if(!strcmp(name
, "random-play")) {
1896 state
= !value
|| !strcmp(value
, "yes");
1897 info("random play %s by %s",
1898 state ?
"enabled" : "disabled",
1900 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1902 if(!strcmp(name
, "required-tags"))
1906 const char *trackdb_get_global(const char *name
) {
1912 tid
= trackdb_begin_transaction();
1913 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1915 trackdb_abort_transaction(tid
);
1917 trackdb_commit_transaction(tid
);
1921 static int trackdb_get_global_tid(const char *name
,
1927 memset(&k
, 0, sizeof k
);
1928 k
.data
= (void *)name
;
1929 k
.size
= strlen(name
);
1930 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1931 prepare_data(&d
), 0)) {
1933 *rp
= xstrndup(d
.data
, d
.size
);
1938 case DB_LOCK_DEADLOCK
:
1941 fatal(0, "error updating database: %s", db_strerror(err
));
1945 /** @brief Retrieve the most recently added tracks
1946 * @param ntracksp Where to put count, or 0
1947 * @param maxtracks Maximum number of tracks to retrieve
1948 * @return null-terminated array of track names
1950 * The most recently added track is first in the array.
1952 char **trackdb_new(int *ntracksp
,
1958 tid
= trackdb_begin_transaction();
1959 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1962 trackdb_abort_transaction(tid
);
1964 trackdb_commit_transaction(tid
);
1968 /** @brief Retrieve the most recently added tracks
1969 * @param ntracksp Where to put count, or 0
1970 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1971 * @param tid Transaction ID
1972 * @return null-terminated array of track names, or NULL on deadlock
1974 * The most recently added track is first in the array.
1976 static char **trackdb_new_tid(int *ntracksp
,
1982 struct vector tracks
[1];
1984 vector_init(tracks
);
1985 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1986 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1987 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1988 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1990 case 0: /* hit maxtracks */
1991 case DB_NOTFOUND
: /* ran out of tracks */
1993 case DB_LOCK_DEADLOCK
:
1994 trackdb_closecursor(c
);
1997 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
1999 if((err
= trackdb_closecursor(c
)))
2000 return 0; /* deadlock */
2001 vector_terminate(tracks
);
2003 *ntracksp
= tracks
->nvec
;
2007 /** @brief Expire noticed.db
2008 * @param earliest Earliest timestamp to keep
2010 void trackdb_expire_noticed(time_t earliest
) {
2014 tid
= trackdb_begin_transaction();
2015 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2017 trackdb_abort_transaction(tid
);
2019 trackdb_commit_transaction(tid
);
2022 /** @brief Expire noticed.db
2023 * @param earliest Earliest timestamp to keep
2024 * @param tid Transaction ID
2025 * @return 0 or DB_LOCK_DEADLOCK
2027 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2035 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2036 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2038 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2039 if(when
>= earliest
)
2041 if((err
= c
->c_del(c
, 0))) {
2042 if(err
!= DB_LOCK_DEADLOCK
)
2043 fatal(0, "error deleting expired noticed.db entry: %s",
2049 if(err
== DB_NOTFOUND
)
2051 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2052 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2054 if((err
= trackdb_closecursor(c
))) {
2055 if(err
!= DB_LOCK_DEADLOCK
)
2056 fatal(0, "error closing cursor: %s", db_strerror(err
));
2060 info("expired %d tracks from noticed.db", count
);
2064 /* tidying up ****************************************************************/
2066 void trackdb_gc(void) {
2070 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2071 config
->checkpoint_kbyte
,
2072 config
->checkpoint_min
,
2074 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2075 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2076 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2077 /* This makes catastrophic recovery impossible. However, the user can still
2078 * preserve the important data by using disorder-dump to snapshot their
2079 * prefs, and later to restore it. This is likely to have much small
2080 * long-term storage requirements than record the db logfiles. */
2088 indent-tabs-mode:nil