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
,
162 /* If we're in the background then trap subprocess stdout/stderr */
164 lfd
= logfd(ev
, prog
);
167 if(!(pid
= xfork())) {
169 ev_signal_atfork(ev
);
170 signal(SIGPIPE
, SIG_DFL
);
180 /* If we were negatively niced, undo it. We don't bother checking for
181 * error, it's not that important. */
182 setpriority(PRIO_PROCESS
, 0, 0);
183 execlp(prog
, prog
, "--config", configfile
,
184 debugging ?
"--debug" : "--no-debug",
185 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
187 fatal(errno
, "error invoking %s", prog
);
189 if(lfd
!= -1) xclose(lfd
);
193 /* start deadlock manager */
194 void trackdb_master(ev_source
*ev
) {
195 assert(db_deadlock_pid
== -1);
196 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
197 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
198 D(("started deadlock manager"));
201 /* close environment */
202 void trackdb_deinit(void) {
206 assert(initialized
== 1);
209 /* close the environment */
210 if((err
= trackdb_env
->close(trackdb_env
, 0)))
211 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
213 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
214 fatal(errno
, "error killing rescanner");
216 /* terminate the deadlock manager */
217 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
218 fatal(errno
, "error killing deadlock manager");
219 db_deadlock_pid
= -1;
221 D(("deinitialized database environment"));
224 /* open a specific database */
225 static DB
*open_db(const char *path
,
233 D(("open %s", path
));
234 path
= config_get_file(path
);
235 if((err
= db_create(&db
, trackdb_env
, 0)))
236 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
238 if((err
= db
->set_flags(db
, dbflags
)))
239 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
240 if(dbtype
== DB_BTREE
)
241 if((err
= db
->set_bt_compare(db
, compare
)))
242 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
243 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
244 openflags
| DB_AUTO_COMMIT
, mode
)))
245 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
249 /* open track databases */
250 void trackdb_open(void) {
254 /* open the databases */
255 trackdb_tracksdb
= open_db("tracks.db",
256 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
257 trackdb_searchdb
= open_db("search.db",
258 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
259 trackdb_tagsdb
= open_db("tags.db",
260 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
261 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
262 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
263 trackdb_noticeddb
= open_db("noticed.db",
264 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
265 D(("opened databases"));
268 /* close track databases */
269 void trackdb_close(void) {
275 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
276 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
277 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
278 fatal(0, "error closing search.db: %s", db_strerror(err
));
279 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
280 fatal(0, "error closing tags.db: %s", db_strerror(err
));
281 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
282 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
283 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
284 fatal(0, "error closing global.db: %s", db_strerror(err
));
285 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
286 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
287 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
288 trackdb_tagsdb
= trackdb_globaldb
= 0;
289 D(("closed databases"));
292 /* generic db routines *******************************************************/
294 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
295 * DB_LOCK_DEADLOCK. */
296 int trackdb_getdata(DB
*db
,
303 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
304 prepare_data(&data
), 0)) {
306 *kp
= kvp_urldecode(data
.data
, data
.size
);
311 case DB_LOCK_DEADLOCK
:
312 error(0, "error querying database: %s", db_strerror(err
));
315 fatal(0, "error querying database: %s", db_strerror(err
));
319 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
320 * DB_LOCK_DEADLOCK. */
321 int trackdb_putdata(DB
*db
,
329 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
330 encode_data(&data
, k
), flags
)) {
334 case DB_LOCK_DEADLOCK
:
335 error(0, "error updating database: %s", db_strerror(err
));
338 fatal(0, "error updating database: %s", db_strerror(err
));
342 /* delete a database entry */
343 int trackdb_delkey(DB
*db
,
349 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
353 case DB_LOCK_DEADLOCK
:
354 error(0, "error updating database: %s", db_strerror(err
));
357 fatal(0, "error updating database: %s", db_strerror(err
));
361 /* open a database cursor */
362 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
366 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
368 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
373 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
374 int trackdb_closecursor(DBC
*c
) {
378 switch(err
= c
->c_close(c
)) {
381 case DB_LOCK_DEADLOCK
:
382 error(0, "error closing cursor: %s", db_strerror(err
));
385 fatal(0, "error closing cursor: %s", db_strerror(err
));
389 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
390 int trackdb_delkeydata(DB
*db
,
398 c
= trackdb_opencursor(db
, tid
);
399 switch(err
= c
->c_get(c
, make_key(&key
, word
),
400 make_key(&data
, track
), DB_GET_BOTH
)) {
402 switch(err
= c
->c_del(c
, 0)) {
408 case DB_LOCK_DEADLOCK
:
409 error(0, "error updating database: %s", db_strerror(err
));
412 fatal(0, "c->c_del: %s", db_strerror(err
));
417 case DB_LOCK_DEADLOCK
:
418 error(0, "error updating database: %s", db_strerror(err
));
421 fatal(0, "c->c_get: %s", db_strerror(err
));
423 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
427 /* start a transaction */
428 DB_TXN
*trackdb_begin_transaction(void) {
432 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
433 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
437 /* abort transaction */
438 void trackdb_abort_transaction(DB_TXN
*tid
) {
442 if((err
= tid
->abort(tid
)))
443 fatal(0, "tid->abort: %s", db_strerror(err
));
446 /* commit transaction */
447 void trackdb_commit_transaction(DB_TXN
*tid
) {
450 if((err
= tid
->commit(tid
, 0)))
451 fatal(0, "tid->commit: %s", db_strerror(err
));
454 /* search/tags shared code ***************************************************/
456 /* comparison function used by dedupe() */
457 static int wordcmp(const void *a
, const void *b
) {
458 return strcmp(*(const char **)a
, *(const char **)b
);
461 /* sort and de-dupe VEC */
462 static char **dedupe(char **vec
, int nvec
) {
465 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
469 for(n
= 1; n
< nvec
; ++n
)
470 if(strcmp(vec
[n
], vec
[m
- 1]))
477 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
478 static int register_word(DB
*db
, const char *what
,
479 const char *track
, const char *word
,
484 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
485 make_key(&data
, track
), DB_NODUPDATA
)) {
489 case DB_LOCK_DEADLOCK
:
490 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
493 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
497 /* search primitives *********************************************************/
499 /* return true iff NAME is a trackname_display_ pref */
500 static int is_display_pref(const char *name
) {
501 static const char prefix
[] = "trackname_display_";
502 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
505 /* compute the words of a track name */
506 static char **track_to_words(const char *track
,
507 const struct kvp
*p
) {
511 const char *rootless
= track_rootless(track
);
514 rootless
= track
; /* bodge */
516 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
517 vector_append_many(&v
, w
, nw
);
519 for(; p
; p
= p
->next
)
520 if(is_display_pref(p
->name
))
521 if((w
= words(casefold(p
->value
), &nw
)))
522 vector_append_many(&v
, w
, nw
);
523 vector_terminate(&v
);
524 return dedupe(v
.vec
, v
.nvec
);
527 /* return nonzero iff WORD is a stopword */
528 static int stopword(const char *word
) {
531 for(n
= 0; n
< config
->stopword
.n
532 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
534 return n
< config
->stopword
.n
;
537 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
538 static int register_search_word(const char *track
, const char *word
,
540 if(stopword(word
)) return 0;
541 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
544 /* Tags **********************************************************************/
546 /* Return nonzero if C is a valid tag character */
547 static int tagchar(int c
) {
556 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
557 static char **parsetags(const char *s
) {
563 /* skip initial separators */
564 while(*s
&& (!tagchar(*s
) || *s
== ' '))
567 /* find the extent of the tag */
569 while(*s
&& tagchar(*s
))
571 /* strip trailing spaces */
572 while(s
> t
&& s
[-1] == ' ')
574 vector_append(&v
, xstrndup(t
, s
- t
));
575 /* skip intermediate and trailing separators */
576 while(*s
&& (!tagchar(*s
) || *s
== ' '))
580 vector_terminate(&v
);
581 return dedupe(v
.vec
, v
.nvec
);
584 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
585 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
586 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
589 /* aliases *******************************************************************/
591 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
592 * there is no alias sets *aliasp to 0. */
593 static int compute_alias(char **aliasp
,
598 const char *s
= config
->alias
, *t
, *expansion
, *part
;
599 int c
, used_db
= 0, slash_prefix
, err
;
601 const char *const root
= find_track_root(track
);
604 /* Bodge for tracks with no root */
609 dynstr_append_string(&d
, root
);
610 while((c
= (unsigned char)*s
++)) {
612 dynstr_append(&d
, c
);
615 if((slash_prefix
= (*s
== '/')))
618 assert(t
!= 0); /* validated at startup */
619 part
= xstrndup(s
, t
- s
);
620 expansion
= getpart(track
, "display", part
, p
, &used_db
);
622 if(slash_prefix
) dynstr_append(&d
, '/');
623 dynstr_append_string(&d
, expansion
);
625 s
= t
+ 1; /* skip {part} */
627 /* only admit to the alias if we used the db... */
632 dynstr_terminate(&d
);
633 /* ...and the answer differs from the original... */
634 if(!strcmp(track
, d
.vec
)) {
638 /* ...and there isn't already a different track with that name (including as
640 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
642 if((s
= kvp_get(at
, "_alias_for"))
643 && !strcmp(s
, track
)) {
655 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
656 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
657 * Always sets the return values, even if only to null pointers. */
658 static int gettrackdata(const char *track
,
661 const char **actualp
,
663 #define GTD_NOALIAS 0x0001
666 const char *actual
= track
;
667 struct kvp
*t
= 0, *p
= 0;
669 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
670 if((actual
= kvp_get(t
, "_alias_for"))) {
671 if(flags
& GTD_NOALIAS
) {
672 error(0, "alias passed to gettrackdata where real path required");
675 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
680 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
685 if(actualp
) *actualp
= actual
;
691 /* trackdb_notice() **********************************************************/
693 /** @brief notice a possibly new track
694 * @return @c DB_NOTFOUND if new, 0 if already known
696 int trackdb_notice(const char *track
,
702 tid
= trackdb_begin_transaction();
703 err
= trackdb_notice_tid(track
, path
, tid
);
704 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
707 trackdb_abort_transaction(tid
);
709 trackdb_commit_transaction(tid
);
713 /** @brief notice a possibly new track
714 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
716 int trackdb_notice_tid(const char *track
,
720 struct kvp
*t
, *a
, *p
;
724 /* notice whether the tracks.db entry changes */
726 /* get any existing tracks entry */
727 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
729 ret
= err
; /* 0 or DB_NOTFOUND */
730 /* this is a real track */
731 t_changed
+= kvp_set(&t
, "_alias_for", 0);
732 t_changed
+= kvp_set(&t
, "_path", path
);
733 /* if we have an alias record it in the database */
734 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
736 /* won't overwrite someone else's alias as compute_alias() checks */
737 D(("%s: alias %s", track
, alias
));
739 kvp_set(&a
, "_alias_for", track
);
740 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
742 /* update search.db */
743 w
= track_to_words(track
, p
);
744 for(n
= 0; w
[n
]; ++n
)
745 if((err
= register_search_word(track
, w
[n
], tid
)))
748 w
= parsetags(kvp_get(p
, "tags"));
749 for(n
= 0; w
[n
]; ++n
)
750 if((err
= register_tag(track
, w
[n
], tid
)))
753 /* only store the tracks.db entry if it has changed */
754 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
756 if(ret
== DB_NOTFOUND
) {
757 uint32_t timestamp
[2];
762 timestamp
[0] = htonl((uint64_t)now
>> 32);
763 timestamp
[1] = htonl((uint32_t)now
);
764 memset(&key
, 0, sizeof key
);
765 key
.data
= timestamp
;
766 key
.size
= sizeof timestamp
;
767 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
768 make_key(&data
, track
), 0)) {
770 case DB_LOCK_DEADLOCK
: return err
;
771 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
777 /* trackdb_obsolete() ********************************************************/
779 /* obsolete a track */
780 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
785 if((err
= gettrackdata(track
, 0, &p
, 0,
786 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
788 else if(err
== DB_NOTFOUND
) return 0;
789 /* compute the alias, if any, and delete it */
790 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
792 /* if the alias points to some other track then compute_alias won't
794 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
797 /* update search.db */
798 w
= track_to_words(track
, p
);
799 for(n
= 0; w
[n
]; ++n
)
800 if(trackdb_delkeydata(trackdb_searchdb
,
801 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
804 w
= parsetags(kvp_get(p
, "tags"));
805 for(n
= 0; w
[n
]; ++n
)
806 if(trackdb_delkeydata(trackdb_tagsdb
,
807 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
810 /* update tracks.db */
811 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
813 /* We don't delete the prefs, so they survive temporary outages of the
814 * (possibly virtual) track filesystem */
818 /* trackdb_stats() ***********************************************************/
820 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
821 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
823 static const struct statinfo
{
826 } statinfo_hash
[] = {
842 }, statinfo_btree
[] = {
863 /* look up stats for DB */
864 static int get_stats(struct vector
*v
,
866 const struct statinfo
*si
,
875 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
878 case DB_LOCK_DEADLOCK
:
879 error(0, "error querying database: %s", db_strerror(err
));
882 fatal(0, "error querying database: %s", db_strerror(err
));
884 for(n
= 0; n
< nsi
; ++n
) {
885 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
886 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
887 vector_append(v
, str
);
893 struct search_entry
{
898 /* find the top COUNT words in the search database */
899 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
900 struct search_entry
*se
;
903 int err
, n
= 0, nse
= 0, i
;
908 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
909 se
= xmalloc(count
* sizeof *se
);
910 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
912 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
915 #define FINALIZE() do { \
916 if(word && (nse < count || n > se[nse - 1].n)) { \
921 while(i > 0 && n > se[i - 1].n) \
923 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
929 word
= xstrndup(k
.data
, wl
= k
.size
);
937 case DB_LOCK_DEADLOCK
:
938 error(0, "error querying search database: %s", db_strerror(err
));
941 fatal(0, "error querying search database: %s", db_strerror(err
));
943 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
946 byte_xasprintf(&str
, "Top %d search words:", nse
);
947 vector_append(v
, str
);
948 for(i
= 0; i
< nse
; ++i
) {
949 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
950 vector_append(v
, str
);
955 #define SI(what) statinfo_##what, \
956 sizeof statinfo_##what / sizeof (struct statinfo)
958 /* return a list of database stats */
959 char **trackdb_stats(int *nstatsp
) {
965 tid
= trackdb_begin_transaction();
967 vector_append(&v
, (char *)"Tracks database stats:");
968 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
969 vector_append(&v
, (char *)"");
970 vector_append(&v
, (char *)"Search database stats:");
971 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
972 vector_append(&v
, (char *)"");
973 vector_append(&v
, (char *)"Prefs database stats:");
974 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
975 vector_append(&v
, (char *)"");
976 if(search_league(&v
, 10, tid
)) goto fail
;
977 vector_terminate(&v
);
980 trackdb_abort_transaction(tid
);
982 trackdb_commit_transaction(tid
);
983 if(nstatsp
) *nstatsp
= v
.nvec
;
987 struct stats_details
{
988 void (*done
)(char *data
, void *u
);
990 int exited
; /* subprocess exited */
991 int closed
; /* pipe close */
992 int wstat
; /* wait status from subprocess */
993 struct dynstr data
[1]; /* data read from pipe */
996 static void stats_complete(struct stats_details
*d
) {
999 if(!(d
->exited
&& d
->closed
))
1001 byte_xasprintf(&s
, "\n"
1003 "track lookup cache hits: %lu\n"
1004 "track lookup cache misses: %lu\n",
1006 cache_files_misses
);
1007 dynstr_append_string(d
->data
, s
);
1008 dynstr_terminate(d
->data
);
1009 d
->done(d
->data
->vec
, d
->u
);
1012 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1013 pid_t
attribute((unused
)) pid
,
1015 const struct rusage
attribute((unused
)) *rusage
,
1017 struct stats_details
*const d
= u
;
1021 error(0, "disorder-stats %s", wstat(status
));
1026 static int stats_read(ev_source
attribute((unused
)) *ev
,
1032 struct stats_details
*const d
= u
;
1034 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1035 ev_reader_consume(reader
, bytes
);
1042 static int stats_error(ev_source
attribute((unused
)) *ev
,
1045 struct stats_details
*const d
= u
;
1047 error(errno_value
, "error reading from pipe to disorder-stats");
1053 void trackdb_stats_subprocess(ev_source
*ev
,
1054 void (*done
)(char *data
, void *u
),
1058 struct stats_details
*d
= xmalloc(sizeof *d
);
1060 dynstr_init(d
->data
);
1064 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1066 ev_child(ev
, pid
, 0, stats_finished
, d
);
1067 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1070 /* set a pref (remove if value=0) */
1071 int trackdb_set(const char *track
,
1073 const char *value
) {
1074 struct kvp
*t
, *p
, *a
;
1077 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1080 /* TODO: if value matches default then set value=0 */
1084 tid
= trackdb_begin_transaction();
1085 if((err
= gettrackdata(track
, &t
, &p
, 0,
1086 0, tid
)) == DB_LOCK_DEADLOCK
)
1088 if(err
== DB_NOTFOUND
) break;
1089 if(name
[0] == '_') {
1090 if(kvp_set(&t
, name
, value
))
1091 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1094 /* get the old alias name */
1095 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1096 /* get the old tags */
1097 if(!strcmp(name
, "tags"))
1098 oldtags
= parsetags(kvp_get(p
, "tags"));
1100 if(kvp_set(&p
, name
, value
))
1101 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1103 /* compute the new alias name */
1104 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1105 /* check whether alias has changed */
1106 if(!(oldalias
== newalias
1107 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1108 /* adjust alias records to fit change */
1110 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1113 kvp_set(&a
, "_alias_for", track
);
1114 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1117 /* check whether tags have changed */
1118 if(!strcmp(name
, "tags")) {
1119 newtags
= parsetags(value
);
1120 while(*oldtags
|| *newtags
) {
1121 if(*oldtags
&& *newtags
) {
1122 cmp
= strcmp(*oldtags
, *newtags
);
1124 /* keeping this tag */
1128 /* old tag fits into a gap in the new list, so delete old */
1131 /* new tag fits into a gap in the old list, so insert new */
1133 } else if(*oldtags
) {
1134 /* we've run out of new tags, so remaining old ones are to be
1137 if(trackdb_delkeydata(trackdb_tagsdb
,
1138 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1142 /* we've run out of old tags, so remainig new ones are to be
1145 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1155 trackdb_abort_transaction(tid
);
1157 trackdb_commit_transaction(tid
);
1158 return err
== 0 ?
0 : -1;
1162 const char *trackdb_get(const char *track
,
1164 return kvp_get(trackdb_get_all(track
), name
);
1167 /* get all prefs as a 0-terminated array */
1168 struct kvp
*trackdb_get_all(const char *track
) {
1169 struct kvp
*t
, *p
, **pp
;
1173 tid
= trackdb_begin_transaction();
1174 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1178 trackdb_abort_transaction(tid
);
1180 trackdb_commit_transaction(tid
);
1181 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1188 const char *trackdb_resolve(const char *track
) {
1193 tid
= trackdb_begin_transaction();
1194 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1198 trackdb_abort_transaction(tid
);
1200 trackdb_commit_transaction(tid
);
1204 int trackdb_isalias(const char *track
) {
1205 const char *actual
= trackdb_resolve(track
);
1207 return strcmp(actual
, track
);
1210 /* test whether a track exists (perhaps an alias) */
1211 int trackdb_exists(const char *track
) {
1216 tid
= trackdb_begin_transaction();
1217 /* unusually, here we want the return value */
1218 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1222 trackdb_abort_transaction(tid
);
1224 trackdb_commit_transaction(tid
);
1228 /* return the list of tags */
1229 char **trackdb_alltags(void) {
1235 tid
= trackdb_begin_transaction();
1236 err
= trackdb_alltags_tid(tid
, &taglist
);
1238 trackdb_abort_transaction(tid
);
1240 trackdb_commit_transaction(tid
);
1244 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1251 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1252 memset(&k
, 0, sizeof k
);
1253 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1254 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1258 case DB_LOCK_DEADLOCK
:
1261 fatal(0, "c->c_get: %s", db_strerror(err
));
1263 if((err
= trackdb_closecursor(c
))) return err
;
1264 vector_terminate(&v
);
1269 /* return 1 iff sorted tag lists A and B have at least one member in common */
1270 static int tag_intersection(char **a
, char **b
) {
1273 /* Same sort of logic as trackdb_set() above */
1275 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1276 else if(cmp
< 0) ++a
;
1282 /* Check whether a track is suitable for random play. Returns 0 if it is,
1283 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1285 static int check_suitable(const char *track
,
1287 char **required_tags
,
1288 char **prohibited_tags
) {
1292 const char *pick_at_random
, *played_time
;
1294 /* don't pick tracks that aren't in any surviving collection (for instance
1295 * you've edited the config but the rescan hasn't done its job yet) */
1296 if(!find_track_root(track
)) {
1297 info("found track not in any collection: %s", track
);
1300 /* don't pick aliases - only pick the canonical form */
1301 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1302 return DB_LOCK_DEADLOCK
;
1303 if(kvp_get(t
, "_alias_for"))
1305 /* check that random play is not suppressed for this track */
1306 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1307 && !strcmp(pick_at_random
, "0"))
1309 /* don't pick a track that's been played in the last 8 hours */
1310 if((played_time
= kvp_get(p
, "played_time"))) {
1311 last
= atoll(played_time
);
1313 if(now
< last
+ 8 * 3600) /* TODO configurable */
1316 track_tags
= parsetags(kvp_get(p
, "tags"));
1317 /* check that no prohibited tag is present for this track */
1318 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1320 /* check that at least one required tags is present for this track */
1321 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1326 /* attempt to pick a random non-alias track */
1327 const char *trackdb_random(int tries
) {
1332 const char *track
, *candidate
;
1335 char **required_tags
, **prohibited_tags
, **tp
;
1340 tid
= trackdb_begin_transaction();
1341 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1343 required_tags
= parsetags(tags
);
1344 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1346 prohibited_tags
= parsetags(tags
);
1348 if(*required_tags
) {
1349 /* Bung all the suitable tracks into a hash and convert to a list of keys
1350 * (to eliminate duplicates). We cache this list since it is possible
1351 * that it will be very large. */
1354 for(tp
= required_tags
; *tp
; ++tp
) {
1355 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1356 memset(&key
, 0, sizeof key
);
1358 key
.size
= strlen(*tp
);
1360 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1362 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1363 HASH_INSERT_OR_REPLACE
);
1365 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1371 case DB_LOCK_DEADLOCK
:
1374 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1376 trackdb_closecursor(c
);
1379 error(0, "required tag %s does not match any tracks", *tp
);
1381 nreqtracks
= hash_count(h
);
1382 reqtracks
= hash_keys(h
);
1384 while(nreqtracks
&& !track
&& tries
-- > 0) {
1385 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1386 candidate
= reqtracks
[r
];
1387 switch(check_suitable(candidate
, tid
,
1388 required_tags
, prohibited_tags
)) {
1394 case DB_LOCK_DEADLOCK
:
1399 /* No required tags. We pick random record numbers in the database
1401 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1404 case DB_LOCK_DEADLOCK
:
1405 error(0, "error querying tracks.db: %s", db_strerror(err
));
1408 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1411 error(0, "cannot pick tracks at random from an empty database");
1412 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1413 /* record numbers count from 1 upwards */
1414 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1415 memset(&key
, sizeof key
, 0);
1416 key
.flags
= DB_DBT_MALLOC
;
1417 key
.size
= sizeof r
;
1419 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1423 case DB_LOCK_DEADLOCK
:
1424 error(0, "error querying tracks.db: %s", db_strerror(err
));
1427 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1429 candidate
= xstrndup(key
.data
, key
.size
);
1430 switch(check_suitable(candidate
, tid
,
1431 required_tags
, prohibited_tags
)) {
1437 case DB_LOCK_DEADLOCK
:
1444 trackdb_closecursor(c
);
1446 trackdb_abort_transaction(tid
);
1448 trackdb_commit_transaction(tid
);
1450 error(0, "could not pick a random track");
1454 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1455 * from the prefs. */
1456 static const char *getpart(const char *track
,
1457 const char *context
,
1459 const struct kvp
*p
,
1464 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1465 if((result
= kvp_get(p
, pref
)))
1468 result
= trackname_part(track
, context
, part
);
1469 assert(result
!= 0);
1473 /* get a track name part, like trackname_part(), but taking the database into
1475 const char *trackdb_getpart(const char *track
,
1476 const char *context
,
1484 /* construct the full pref */
1485 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1487 tid
= trackdb_begin_transaction();
1488 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1492 trackdb_abort_transaction(tid
);
1494 trackdb_commit_transaction(tid
);
1495 return getpart(actual
, context
, part
, p
, &used_db
);
1498 /* get the raw path name for @track@ (might be an alias) */
1499 const char *trackdb_rawpath(const char *track
) {
1505 tid
= trackdb_begin_transaction();
1506 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1510 trackdb_abort_transaction(tid
);
1512 trackdb_commit_transaction(tid
);
1513 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1517 /* trackdb_list **************************************************************/
1519 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1520 * readable at some point */
1522 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1523 * If RE is a null pointer then it matches everything. */
1524 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1532 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1533 case PCRE_ERROR_NOMATCH
: return 0;
1536 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1543 static int do_list(struct vector
*v
, const char *dir
,
1544 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1550 size_t l
, last_dir_len
= 0;
1551 char *last_dir
= 0, *track
, *alias
;
1555 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1558 /* find the first key >= dir */
1559 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1560 /* keep going while we're dealing with <dir/anything> */
1563 && ((char *)k
.data
)[dl
] == '/'
1564 && !memcmp(k
.data
, dir
, dl
)) {
1565 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1567 /* we have <dir/component/anything>, so <dir/component> is a directory */
1568 l
= ptr
- (char *)k
.data
;
1569 if(what
& trackdb_directories
)
1571 && l
== last_dir_len
1572 && !memcmp(last_dir
, k
.data
, l
))) {
1573 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1574 if(track_matches(dl
, k
.data
, l
, re
))
1575 vector_append(v
, last_dir
);
1578 /* found a plain file */
1579 if((what
& trackdb_files
)) {
1580 track
= xstrndup(k
.data
, k
.size
);
1581 if((err
= trackdb_getdata(trackdb_prefsdb
,
1582 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1584 /* if this file has an alias in the same directory then we skip it */
1585 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1587 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1588 if(track_matches(dl
, k
.data
, k
.size
, re
))
1589 vector_append(v
, track
);
1592 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1600 case DB_LOCK_DEADLOCK
:
1601 error(0, "error querying database: %s", db_strerror(err
));
1604 fatal(0, "error querying database: %s", db_strerror(err
));
1607 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1611 /* return the directories or files below @dir@ */
1612 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1620 tid
= trackdb_begin_transaction();
1623 if(do_list(&v
, dir
, what
, re
, tid
))
1626 for(n
= 0; n
< config
->collection
.n
; ++n
)
1627 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1632 trackdb_abort_transaction(tid
);
1634 trackdb_commit_transaction(tid
);
1635 vector_terminate(&v
);
1641 /* If S is tag:something, return something. Else return 0. */
1642 static const char *checktag(const char *s
) {
1643 if(!strncmp(s
, "tag:", 4))
1649 /* return a list of tracks containing all of the words given. If you
1650 * ask for only stopwords you get no tracks. */
1651 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1652 const char **w
, *best
= 0, *tag
;
1653 char **twords
, **tags
;
1654 int i
, j
, n
, err
, what
;
1664 *ntracks
= 0; /* for early returns */
1665 /* casefold all the words */
1666 w
= xmalloc(nwordlist
* sizeof (char *));
1667 for(n
= 0; n
< nwordlist
; ++n
) {
1668 w
[n
] = casefold(wordlist
[n
]);
1669 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1671 /* find the longest non-stopword */
1672 for(n
= 0; n
< nwordlist
; ++n
)
1673 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1674 if(!best
|| strlen(w
[n
]) > strlen(best
))
1676 /* TODO: we should at least in principal be able to identify the word or tag
1677 * with the least matches in log time, and choose that as our primary search
1679 if(ntags
&& !best
) {
1680 /* Only tags are listed. We limit to the first and narrow down with the
1682 best
= checktag(w
[0]);
1683 db
= trackdb_tagsdb
;
1686 /* We can limit to some word. */
1687 db
= trackdb_searchdb
;
1690 /* Only stopwords */
1696 tid
= trackdb_begin_transaction();
1697 /* find all the tracks that have that word */
1702 cursor
= trackdb_opencursor(db
, tid
);
1703 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1704 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1711 case DB_LOCK_DEADLOCK
:
1712 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1715 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1717 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1719 /* do a naive search over that (hopefuly fairly small) list of tracks */
1721 for(n
= 0; n
< v
.nvec
; ++n
) {
1722 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1725 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1728 twords
= track_to_words(v
.vec
[n
], p
);
1729 tags
= parsetags(kvp_get(p
, "tags"));
1730 for(i
= 0; i
< nwordlist
; ++i
) {
1731 if((tag
= checktag(w
[i
]))) {
1732 /* Track must have this tag */
1733 for(j
= 0; tags
[j
]; ++j
)
1734 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1735 if(!tags
[j
]) break; /* tag not found */
1737 /* Track must contain this word */
1738 for(j
= 0; twords
[j
]; ++j
)
1739 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1740 if(!twords
[j
]) break; /* word not found */
1743 if(i
>= nwordlist
) /* all words found */
1744 vector_append(&u
, v
.vec
[n
]);
1748 trackdb_closecursor(cursor
);
1750 trackdb_abort_transaction(tid
);
1751 info("retrying search");
1753 trackdb_commit_transaction(tid
);
1754 vector_terminate(&u
);
1760 /* trackdb_scan **************************************************************/
1762 int trackdb_scan(const char *root
,
1763 int (*callback
)(const char *track
,
1771 const size_t root_len
= root ?
strlen(root
) : 0;
1776 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1778 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1781 memset(&k
, 0, sizeof k
);
1782 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1787 || (k
.size
> root_len
1788 && !strncmp(k
.data
, root
, root_len
)
1789 && ((char *)k
.data
)[root_len
] == '/')) {
1790 data
= kvp_urldecode(d
.data
, d
.size
);
1791 if(kvp_get(data
, "_path")) {
1792 track
= xstrndup(k
.data
, k
.size
);
1793 /* Advance to the next track before the callback so that the callback
1794 * may safely delete the track */
1795 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1796 if((cberr
= callback(track
, data
, u
, tid
))) {
1801 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1805 trackdb_closecursor(cursor
);
1812 case DB_LOCK_DEADLOCK
:
1813 error(0, "c->c_get: %s", db_strerror(err
));
1816 fatal(0, "c->c_get: %s", db_strerror(err
));
1820 /* trackdb_rescan ************************************************************/
1822 /* called when the rescanner terminates */
1823 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1826 const struct rusage
attribute((unused
)) *rusage
,
1827 void attribute((unused
)) *u
) {
1828 if(pid
== rescan_pid
) rescan_pid
= -1;
1830 error(0, "disorderd-rescan: %s", wstat(status
));
1832 D(("disorderd-rescan terminate: %s", wstat(status
)));
1833 /* Our cache of file lookups is out of date now */
1834 cache_clean(&cache_files_type
);
1835 eventlog("rescanned", (char *)0);
1839 void trackdb_rescan(ev_source
*ev
) {
1840 if(rescan_pid
!= -1) {
1841 error(0, "rescan already underway");
1844 rescan_pid
= subprogram(ev
, RESCAN
, -1);
1845 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1846 D(("started rescanner"));
1850 int trackdb_rescan_cancel(void) {
1851 if(rescan_pid
== -1) return 0;
1852 if(kill(rescan_pid
, SIGTERM
) < 0)
1853 fatal(errno
, "error killing rescanner");
1858 /* global prefs **************************************************************/
1860 void trackdb_set_global(const char *name
,
1868 memset(&k
, 0, sizeof k
);
1869 memset(&d
, 0, sizeof d
);
1870 k
.data
= (void *)name
;
1871 k
.size
= strlen(name
);
1873 d
.data
= (void *)value
;
1874 d
.size
= strlen(value
);
1877 tid
= trackdb_begin_transaction();
1879 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1881 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1882 if(!err
|| err
== DB_NOTFOUND
) break;
1883 if(err
!= DB_LOCK_DEADLOCK
)
1884 fatal(0, "error updating database: %s", db_strerror(err
));
1885 trackdb_abort_transaction(tid
);
1887 trackdb_commit_transaction(tid
);
1888 /* log important state changes */
1889 if(!strcmp(name
, "playing")) {
1890 state
= !value
|| !strcmp(value
, "yes");
1891 info("playing %s by %s",
1892 state ?
"enabled" : "disabled",
1894 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1896 if(!strcmp(name
, "random-play")) {
1897 state
= !value
|| !strcmp(value
, "yes");
1898 info("random play %s by %s",
1899 state ?
"enabled" : "disabled",
1901 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1903 if(!strcmp(name
, "required-tags"))
1907 const char *trackdb_get_global(const char *name
) {
1913 tid
= trackdb_begin_transaction();
1914 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1916 trackdb_abort_transaction(tid
);
1918 trackdb_commit_transaction(tid
);
1922 static int trackdb_get_global_tid(const char *name
,
1928 memset(&k
, 0, sizeof k
);
1929 k
.data
= (void *)name
;
1930 k
.size
= strlen(name
);
1931 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1932 prepare_data(&d
), 0)) {
1934 *rp
= xstrndup(d
.data
, d
.size
);
1939 case DB_LOCK_DEADLOCK
:
1942 fatal(0, "error updating database: %s", db_strerror(err
));
1946 /** @brief Retrieve the most recently added tracks
1947 * @param ntracksp Where to put count, or 0
1948 * @param maxtracks Maximum number of tracks to retrieve
1949 * @return null-terminated array of track names
1951 * The most recently added track is first in the array.
1953 char **trackdb_new(int *ntracksp
,
1959 tid
= trackdb_begin_transaction();
1960 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1963 trackdb_abort_transaction(tid
);
1965 trackdb_commit_transaction(tid
);
1969 /** @brief Retrieve the most recently added tracks
1970 * @param ntracksp Where to put count, or 0
1971 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1972 * @param tid Transaction ID
1973 * @return null-terminated array of track names, or NULL on deadlock
1975 * The most recently added track is first in the array.
1977 static char **trackdb_new_tid(int *ntracksp
,
1983 struct vector tracks
[1];
1985 vector_init(tracks
);
1986 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1987 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1988 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1989 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1991 case 0: /* hit maxtracks */
1992 case DB_NOTFOUND
: /* ran out of tracks */
1994 case DB_LOCK_DEADLOCK
:
1995 trackdb_closecursor(c
);
1998 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
2000 if((err
= trackdb_closecursor(c
)))
2001 return 0; /* deadlock */
2002 vector_terminate(tracks
);
2004 *ntracksp
= tracks
->nvec
;
2008 /** @brief Expire noticed.db
2009 * @param earliest Earliest timestamp to keep
2011 void trackdb_expire_noticed(time_t earliest
) {
2015 tid
= trackdb_begin_transaction();
2016 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2018 trackdb_abort_transaction(tid
);
2020 trackdb_commit_transaction(tid
);
2023 /** @brief Expire noticed.db
2024 * @param earliest Earliest timestamp to keep
2025 * @param tid Transaction ID
2026 * @return 0 or DB_LOCK_DEADLOCK
2028 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2036 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2037 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2039 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2040 if(when
>= earliest
)
2042 if((err
= c
->c_del(c
, 0))) {
2043 if(err
!= DB_LOCK_DEADLOCK
)
2044 fatal(0, "error deleting expired noticed.db entry: %s",
2050 if(err
== DB_NOTFOUND
)
2052 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2053 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2055 if((err
= trackdb_closecursor(c
))) {
2056 if(err
!= DB_LOCK_DEADLOCK
)
2057 fatal(0, "error closing cursor: %s", db_strerror(err
));
2061 info("expired %d tracks from noticed.db", count
);
2065 /* tidying up ****************************************************************/
2067 void trackdb_gc(void) {
2071 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2072 config
->checkpoint_kbyte
,
2073 config
->checkpoint_min
,
2075 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2076 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2077 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2078 /* This makes catastrophic recovery impossible. However, the user can still
2079 * preserve the important data by using disorder-dump to snapshot their
2080 * prefs, and later to restore it. This is likely to have much small
2081 * long-term storage requirements than record the db logfiles. */
2089 indent-tabs-mode:nil