2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track
,
65 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
);
66 static int trackdb_get_global_tid(const char *name
,
69 static char **trackdb_new_tid(int *ntracksp
,
72 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
74 const struct cache_type cache_files_type
= { 86400 };
75 unsigned long cache_files_hits
, cache_files_misses
;
77 /* setup and teardown ********************************************************/
79 static const char *home
; /* home had better not change */
80 DB_ENV
*trackdb_env
; /* db environment */
81 DB
*trackdb_tracksdb
; /* the db itself */
82 DB
*trackdb_prefsdb
; /* preferences */
83 DB
*trackdb_searchdb
; /* the search database */
84 DB
*trackdb_tagsdb
; /* the tags database */
85 DB
*trackdb_globaldb
; /* global preferences */
86 DB
*trackdb_noticeddb
; /* when track noticed */
87 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
88 static pid_t rescan_pid
= -1; /* rescanner PID */
89 static int initialized
, opened
; /* state */
91 /* tracks matched by required_tags */
92 static char **reqtracks
;
93 static size_t nreqtracks
;
95 /* comparison function for keys */
96 static int compare(DB
attribute((unused
)) *db_
,
97 const DBT
*a
, const DBT
*b
) {
98 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
101 /* open environment */
102 void trackdb_init(int recover
) {
104 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
107 assert(initialized
== 0);
110 if(strcmp(home
, config
->home
))
111 fatal(0, "cannot change db home without server restart");
115 /* create environment */
116 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
118 if((err
= trackdb_env
->set_alloc(trackdb_env
,
119 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
120 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
121 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
122 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
123 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
124 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
125 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
131 |recover_type
[recover
],
133 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
134 trackdb_env
->set_errpfx(trackdb_env
, "DB");
135 trackdb_env
->set_errfile(trackdb_env
, stderr
);
136 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
137 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
138 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
139 D(("initialized database environment"));
142 /* called when deadlock manager terminates */
143 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
144 pid_t
attribute((unused
)) pid
,
146 const struct rusage
attribute((unused
)) *rusage
,
147 void attribute((unused
)) *u
) {
148 db_deadlock_pid
= -1;
150 fatal(0, "deadlock manager unexpectedly terminated: %s",
153 D(("deadlock manager terminated: %s", wstat(status
)));
157 static pid_t
subprogram(ev_source
*ev
, const char *prog
,
161 /* If we're in the background then trap subprocess stdout/stderr */
162 if(!(pid
= xfork())) {
164 ev_signal_atfork(ev
);
165 signal(SIGPIPE
, SIG_DFL
);
170 /* If we were negatively niced, undo it. We don't bother checking for
171 * error, it's not that important. */
172 setpriority(PRIO_PROCESS
, 0, 0);
173 execlp(prog
, prog
, "--config", configfile
,
174 debugging ?
"--debug" : "--no-debug",
175 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
177 fatal(errno
, "error invoking %s", prog
);
182 /* start deadlock manager */
183 void trackdb_master(ev_source
*ev
) {
184 assert(db_deadlock_pid
== -1);
185 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
186 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
187 D(("started deadlock manager"));
190 /* close environment */
191 void trackdb_deinit(void) {
195 assert(initialized
== 1);
198 /* close the environment */
199 if((err
= trackdb_env
->close(trackdb_env
, 0)))
200 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
202 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
203 fatal(errno
, "error killing rescanner");
205 /* terminate the deadlock manager */
206 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
207 fatal(errno
, "error killing deadlock manager");
208 db_deadlock_pid
= -1;
210 D(("deinitialized database environment"));
213 /* open a specific database */
214 static DB
*open_db(const char *path
,
222 D(("open %s", path
));
223 path
= config_get_file(path
);
224 if((err
= db_create(&db
, trackdb_env
, 0)))
225 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
227 if((err
= db
->set_flags(db
, dbflags
)))
228 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
229 if(dbtype
== DB_BTREE
)
230 if((err
= db
->set_bt_compare(db
, compare
)))
231 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
232 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
233 openflags
| DB_AUTO_COMMIT
, mode
)))
234 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
238 /* open track databases */
239 void trackdb_open(void) {
243 /* open the databases */
244 trackdb_tracksdb
= open_db("tracks.db",
245 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
246 trackdb_searchdb
= open_db("search.db",
247 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
248 trackdb_tagsdb
= open_db("tags.db",
249 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
250 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
251 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
252 trackdb_noticeddb
= open_db("noticed.db",
253 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
254 D(("opened databases"));
257 /* close track databases */
258 void trackdb_close(void) {
264 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
265 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
266 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
267 fatal(0, "error closing search.db: %s", db_strerror(err
));
268 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
269 fatal(0, "error closing tags.db: %s", db_strerror(err
));
270 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
271 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
272 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
273 fatal(0, "error closing global.db: %s", db_strerror(err
));
274 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
275 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
276 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
277 trackdb_tagsdb
= trackdb_globaldb
= 0;
278 D(("closed databases"));
281 /* generic db routines *******************************************************/
283 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
284 * DB_LOCK_DEADLOCK. */
285 int trackdb_getdata(DB
*db
,
292 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
293 prepare_data(&data
), 0)) {
295 *kp
= kvp_urldecode(data
.data
, data
.size
);
300 case DB_LOCK_DEADLOCK
:
301 error(0, "error querying database: %s", db_strerror(err
));
304 fatal(0, "error querying database: %s", db_strerror(err
));
308 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
309 * DB_LOCK_DEADLOCK. */
310 int trackdb_putdata(DB
*db
,
318 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
319 encode_data(&data
, k
), flags
)) {
323 case DB_LOCK_DEADLOCK
:
324 error(0, "error updating database: %s", db_strerror(err
));
327 fatal(0, "error updating database: %s", db_strerror(err
));
331 /* delete a database entry */
332 int trackdb_delkey(DB
*db
,
338 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
342 case DB_LOCK_DEADLOCK
:
343 error(0, "error updating database: %s", db_strerror(err
));
346 fatal(0, "error updating database: %s", db_strerror(err
));
350 /* open a database cursor */
351 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
355 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
357 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
362 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
363 int trackdb_closecursor(DBC
*c
) {
367 switch(err
= c
->c_close(c
)) {
370 case DB_LOCK_DEADLOCK
:
371 error(0, "error closing cursor: %s", db_strerror(err
));
374 fatal(0, "error closing cursor: %s", db_strerror(err
));
378 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
379 int trackdb_delkeydata(DB
*db
,
387 c
= trackdb_opencursor(db
, tid
);
388 switch(err
= c
->c_get(c
, make_key(&key
, word
),
389 make_key(&data
, track
), DB_GET_BOTH
)) {
391 switch(err
= c
->c_del(c
, 0)) {
397 case DB_LOCK_DEADLOCK
:
398 error(0, "error updating database: %s", db_strerror(err
));
401 fatal(0, "c->c_del: %s", db_strerror(err
));
406 case DB_LOCK_DEADLOCK
:
407 error(0, "error updating database: %s", db_strerror(err
));
410 fatal(0, "c->c_get: %s", db_strerror(err
));
412 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
416 /* start a transaction */
417 DB_TXN
*trackdb_begin_transaction(void) {
421 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
422 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
426 /* abort transaction */
427 void trackdb_abort_transaction(DB_TXN
*tid
) {
431 if((err
= tid
->abort(tid
)))
432 fatal(0, "tid->abort: %s", db_strerror(err
));
435 /* commit transaction */
436 void trackdb_commit_transaction(DB_TXN
*tid
) {
439 if((err
= tid
->commit(tid
, 0)))
440 fatal(0, "tid->commit: %s", db_strerror(err
));
443 /* search/tags shared code ***************************************************/
445 /* comparison function used by dedupe() */
446 static int wordcmp(const void *a
, const void *b
) {
447 return strcmp(*(const char **)a
, *(const char **)b
);
450 /* sort and de-dupe VEC */
451 static char **dedupe(char **vec
, int nvec
) {
454 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
458 for(n
= 1; n
< nvec
; ++n
)
459 if(strcmp(vec
[n
], vec
[m
- 1]))
466 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
467 static int register_word(DB
*db
, const char *what
,
468 const char *track
, const char *word
,
473 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
474 make_key(&data
, track
), DB_NODUPDATA
)) {
478 case DB_LOCK_DEADLOCK
:
479 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
482 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
486 /* search primitives *********************************************************/
488 /* return true iff NAME is a trackname_display_ pref */
489 static int is_display_pref(const char *name
) {
490 static const char prefix
[] = "trackname_display_";
491 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
494 /* compute the words of a track name */
495 static char **track_to_words(const char *track
,
496 const struct kvp
*p
) {
500 const char *rootless
= track_rootless(track
);
503 rootless
= track
; /* bodge */
505 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
506 vector_append_many(&v
, w
, nw
);
508 for(; p
; p
= p
->next
)
509 if(is_display_pref(p
->name
))
510 if((w
= words(casefold(p
->value
), &nw
)))
511 vector_append_many(&v
, w
, nw
);
512 vector_terminate(&v
);
513 return dedupe(v
.vec
, v
.nvec
);
516 /* return nonzero iff WORD is a stopword */
517 static int stopword(const char *word
) {
520 for(n
= 0; n
< config
->stopword
.n
521 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
523 return n
< config
->stopword
.n
;
526 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
527 static int register_search_word(const char *track
, const char *word
,
529 if(stopword(word
)) return 0;
530 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
533 /* Tags **********************************************************************/
535 /* Return nonzero if C is a valid tag character */
536 static int tagchar(int c
) {
545 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
546 static char **parsetags(const char *s
) {
552 /* skip initial separators */
553 while(*s
&& (!tagchar(*s
) || *s
== ' '))
556 /* find the extent of the tag */
558 while(*s
&& tagchar(*s
))
560 /* strip trailing spaces */
561 while(s
> t
&& s
[-1] == ' ')
563 vector_append(&v
, xstrndup(t
, s
- t
));
564 /* skip intermediate and trailing separators */
565 while(*s
&& (!tagchar(*s
) || *s
== ' '))
569 vector_terminate(&v
);
570 return dedupe(v
.vec
, v
.nvec
);
573 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
574 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
575 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
578 /* aliases *******************************************************************/
580 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
581 * there is no alias sets *aliasp to 0. */
582 static int compute_alias(char **aliasp
,
587 const char *s
= config
->alias
, *t
, *expansion
, *part
;
588 int c
, used_db
= 0, slash_prefix
, err
;
590 const char *const root
= find_track_root(track
);
593 /* Bodge for tracks with no root */
598 dynstr_append_string(&d
, root
);
599 while((c
= (unsigned char)*s
++)) {
601 dynstr_append(&d
, c
);
604 if((slash_prefix
= (*s
== '/')))
607 assert(t
!= 0); /* validated at startup */
608 part
= xstrndup(s
, t
- s
);
609 expansion
= getpart(track
, "display", part
, p
, &used_db
);
611 if(slash_prefix
) dynstr_append(&d
, '/');
612 dynstr_append_string(&d
, expansion
);
614 s
= t
+ 1; /* skip {part} */
616 /* only admit to the alias if we used the db... */
621 dynstr_terminate(&d
);
622 /* ...and the answer differs from the original... */
623 if(!strcmp(track
, d
.vec
)) {
627 /* ...and there isn't already a different track with that name (including as
629 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
631 if((s
= kvp_get(at
, "_alias_for"))
632 && !strcmp(s
, track
)) {
644 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
645 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
646 * Always sets the return values, even if only to null pointers. */
647 static int gettrackdata(const char *track
,
650 const char **actualp
,
652 #define GTD_NOALIAS 0x0001
655 const char *actual
= track
;
656 struct kvp
*t
= 0, *p
= 0;
658 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
659 if((actual
= kvp_get(t
, "_alias_for"))) {
660 if(flags
& GTD_NOALIAS
) {
661 error(0, "alias passed to gettrackdata where real path required");
664 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
669 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
674 if(actualp
) *actualp
= actual
;
680 /* trackdb_notice() **********************************************************/
682 /** @brief notice a possibly new track
683 * @return @c DB_NOTFOUND if new, 0 if already known
685 int trackdb_notice(const char *track
,
691 tid
= trackdb_begin_transaction();
692 err
= trackdb_notice_tid(track
, path
, tid
);
693 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
696 trackdb_abort_transaction(tid
);
698 trackdb_commit_transaction(tid
);
702 /** @brief notice a possibly new track
703 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
705 int trackdb_notice_tid(const char *track
,
709 struct kvp
*t
, *a
, *p
;
713 /* notice whether the tracks.db entry changes */
715 /* get any existing tracks entry */
716 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
718 ret
= err
; /* 0 or DB_NOTFOUND */
719 /* this is a real track */
720 t_changed
+= kvp_set(&t
, "_alias_for", 0);
721 t_changed
+= kvp_set(&t
, "_path", path
);
722 /* if we have an alias record it in the database */
723 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
725 /* won't overwrite someone else's alias as compute_alias() checks */
726 D(("%s: alias %s", track
, alias
));
728 kvp_set(&a
, "_alias_for", track
);
729 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
731 /* update search.db */
732 w
= track_to_words(track
, p
);
733 for(n
= 0; w
[n
]; ++n
)
734 if((err
= register_search_word(track
, w
[n
], tid
)))
737 w
= parsetags(kvp_get(p
, "tags"));
738 for(n
= 0; w
[n
]; ++n
)
739 if((err
= register_tag(track
, w
[n
], tid
)))
742 /* only store the tracks.db entry if it has changed */
743 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
745 if(ret
== DB_NOTFOUND
) {
746 uint32_t timestamp
[2];
751 timestamp
[0] = htonl((uint64_t)now
>> 32);
752 timestamp
[1] = htonl((uint32_t)now
);
753 memset(&key
, 0, sizeof key
);
754 key
.data
= timestamp
;
755 key
.size
= sizeof timestamp
;
756 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
757 make_key(&data
, track
), 0)) {
759 case DB_LOCK_DEADLOCK
: return err
;
760 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
766 /* trackdb_obsolete() ********************************************************/
768 /* obsolete a track */
769 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
774 if((err
= gettrackdata(track
, 0, &p
, 0,
775 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
777 else if(err
== DB_NOTFOUND
) return 0;
778 /* compute the alias, if any, and delete it */
779 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
781 /* if the alias points to some other track then compute_alias won't
783 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
786 /* update search.db */
787 w
= track_to_words(track
, p
);
788 for(n
= 0; w
[n
]; ++n
)
789 if(trackdb_delkeydata(trackdb_searchdb
,
790 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
793 w
= parsetags(kvp_get(p
, "tags"));
794 for(n
= 0; w
[n
]; ++n
)
795 if(trackdb_delkeydata(trackdb_tagsdb
,
796 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
799 /* update tracks.db */
800 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
802 /* We don't delete the prefs, so they survive temporary outages of the
803 * (possibly virtual) track filesystem */
807 /* trackdb_stats() ***********************************************************/
809 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
810 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
812 static const struct statinfo
{
815 } statinfo_hash
[] = {
831 }, statinfo_btree
[] = {
852 /* look up stats for DB */
853 static int get_stats(struct vector
*v
,
855 const struct statinfo
*si
,
864 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
867 case DB_LOCK_DEADLOCK
:
868 error(0, "error querying database: %s", db_strerror(err
));
871 fatal(0, "error querying database: %s", db_strerror(err
));
873 for(n
= 0; n
< nsi
; ++n
) {
874 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
875 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
876 vector_append(v
, str
);
882 struct search_entry
{
887 /* find the top COUNT words in the search database */
888 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
889 struct search_entry
*se
;
892 int err
, n
= 0, nse
= 0, i
;
897 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
898 se
= xmalloc(count
* sizeof *se
);
899 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
901 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
904 #define FINALIZE() do { \
905 if(word && (nse < count || n > se[nse - 1].n)) { \
910 while(i > 0 && n > se[i - 1].n) \
912 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
918 word
= xstrndup(k
.data
, wl
= k
.size
);
926 case DB_LOCK_DEADLOCK
:
927 error(0, "error querying search database: %s", db_strerror(err
));
930 fatal(0, "error querying search database: %s", db_strerror(err
));
932 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
935 byte_xasprintf(&str
, "Top %d search words:", nse
);
936 vector_append(v
, str
);
937 for(i
= 0; i
< nse
; ++i
) {
938 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
939 vector_append(v
, str
);
944 #define SI(what) statinfo_##what, \
945 sizeof statinfo_##what / sizeof (struct statinfo)
947 /* return a list of database stats */
948 char **trackdb_stats(int *nstatsp
) {
954 tid
= trackdb_begin_transaction();
956 vector_append(&v
, (char *)"Tracks database stats:");
957 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
958 vector_append(&v
, (char *)"");
959 vector_append(&v
, (char *)"Search database stats:");
960 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
961 vector_append(&v
, (char *)"");
962 vector_append(&v
, (char *)"Prefs database stats:");
963 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
964 vector_append(&v
, (char *)"");
965 if(search_league(&v
, 10, tid
)) goto fail
;
966 vector_terminate(&v
);
969 trackdb_abort_transaction(tid
);
971 trackdb_commit_transaction(tid
);
972 if(nstatsp
) *nstatsp
= v
.nvec
;
976 struct stats_details
{
977 void (*done
)(char *data
, void *u
);
979 int exited
; /* subprocess exited */
980 int closed
; /* pipe close */
981 int wstat
; /* wait status from subprocess */
982 struct dynstr data
[1]; /* data read from pipe */
985 static void stats_complete(struct stats_details
*d
) {
988 if(!(d
->exited
&& d
->closed
))
990 byte_xasprintf(&s
, "\n"
992 "track lookup cache hits: %lu\n"
993 "track lookup cache misses: %lu\n",
996 dynstr_append_string(d
->data
, s
);
997 dynstr_terminate(d
->data
);
998 d
->done(d
->data
->vec
, d
->u
);
1001 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1002 pid_t
attribute((unused
)) pid
,
1004 const struct rusage
attribute((unused
)) *rusage
,
1006 struct stats_details
*const d
= u
;
1010 error(0, "disorder-stats %s", wstat(status
));
1015 static int stats_read(ev_source
attribute((unused
)) *ev
,
1021 struct stats_details
*const d
= u
;
1023 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1024 ev_reader_consume(reader
, bytes
);
1031 static int stats_error(ev_source
attribute((unused
)) *ev
,
1034 struct stats_details
*const d
= u
;
1036 error(errno_value
, "error reading from pipe to disorder-stats");
1042 void trackdb_stats_subprocess(ev_source
*ev
,
1043 void (*done
)(char *data
, void *u
),
1047 struct stats_details
*d
= xmalloc(sizeof *d
);
1049 dynstr_init(d
->data
);
1053 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1055 ev_child(ev
, pid
, 0, stats_finished
, d
);
1056 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1059 /* set a pref (remove if value=0) */
1060 int trackdb_set(const char *track
,
1062 const char *value
) {
1063 struct kvp
*t
, *p
, *a
;
1066 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1069 /* TODO: if value matches default then set value=0 */
1073 tid
= trackdb_begin_transaction();
1074 if((err
= gettrackdata(track
, &t
, &p
, 0,
1075 0, tid
)) == DB_LOCK_DEADLOCK
)
1077 if(err
== DB_NOTFOUND
) break;
1078 if(name
[0] == '_') {
1079 if(kvp_set(&t
, name
, value
))
1080 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1083 /* get the old alias name */
1084 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1085 /* get the old tags */
1086 if(!strcmp(name
, "tags"))
1087 oldtags
= parsetags(kvp_get(p
, "tags"));
1089 if(kvp_set(&p
, name
, value
))
1090 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1092 /* compute the new alias name */
1093 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1094 /* check whether alias has changed */
1095 if(!(oldalias
== newalias
1096 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1097 /* adjust alias records to fit change */
1099 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1102 kvp_set(&a
, "_alias_for", track
);
1103 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1106 /* check whether tags have changed */
1107 if(!strcmp(name
, "tags")) {
1108 newtags
= parsetags(value
);
1109 while(*oldtags
|| *newtags
) {
1110 if(*oldtags
&& *newtags
) {
1111 cmp
= strcmp(*oldtags
, *newtags
);
1113 /* keeping this tag */
1117 /* old tag fits into a gap in the new list, so delete old */
1120 /* new tag fits into a gap in the old list, so insert new */
1122 } else if(*oldtags
) {
1123 /* we've run out of new tags, so remaining old ones are to be
1126 if(trackdb_delkeydata(trackdb_tagsdb
,
1127 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1131 /* we've run out of old tags, so remainig new ones are to be
1134 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1144 trackdb_abort_transaction(tid
);
1146 trackdb_commit_transaction(tid
);
1147 return err
== 0 ?
0 : -1;
1151 const char *trackdb_get(const char *track
,
1153 return kvp_get(trackdb_get_all(track
), name
);
1156 /* get all prefs as a 0-terminated array */
1157 struct kvp
*trackdb_get_all(const char *track
) {
1158 struct kvp
*t
, *p
, **pp
;
1162 tid
= trackdb_begin_transaction();
1163 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1167 trackdb_abort_transaction(tid
);
1169 trackdb_commit_transaction(tid
);
1170 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1177 const char *trackdb_resolve(const char *track
) {
1182 tid
= trackdb_begin_transaction();
1183 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1187 trackdb_abort_transaction(tid
);
1189 trackdb_commit_transaction(tid
);
1193 int trackdb_isalias(const char *track
) {
1194 const char *actual
= trackdb_resolve(track
);
1196 return strcmp(actual
, track
);
1199 /* test whether a track exists (perhaps an alias) */
1200 int trackdb_exists(const char *track
) {
1205 tid
= trackdb_begin_transaction();
1206 /* unusually, here we want the return value */
1207 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1211 trackdb_abort_transaction(tid
);
1213 trackdb_commit_transaction(tid
);
1217 /* return the list of tags */
1218 char **trackdb_alltags(void) {
1224 tid
= trackdb_begin_transaction();
1225 err
= trackdb_alltags_tid(tid
, &taglist
);
1227 trackdb_abort_transaction(tid
);
1229 trackdb_commit_transaction(tid
);
1233 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1240 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1241 memset(&k
, 0, sizeof k
);
1242 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1243 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1247 case DB_LOCK_DEADLOCK
:
1250 fatal(0, "c->c_get: %s", db_strerror(err
));
1252 if((err
= trackdb_closecursor(c
))) return err
;
1253 vector_terminate(&v
);
1258 /* return 1 iff sorted tag lists A and B have at least one member in common */
1259 static int tag_intersection(char **a
, char **b
) {
1262 /* Same sort of logic as trackdb_set() above */
1264 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1265 else if(cmp
< 0) ++a
;
1271 /* Check whether a track is suitable for random play. Returns 0 if it is,
1272 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1274 static int check_suitable(const char *track
,
1276 char **required_tags
,
1277 char **prohibited_tags
) {
1281 const char *pick_at_random
, *played_time
;
1283 /* don't pick tracks that aren't in any surviving collection (for instance
1284 * you've edited the config but the rescan hasn't done its job yet) */
1285 if(!find_track_root(track
)) {
1286 info("found track not in any collection: %s", track
);
1289 /* don't pick aliases - only pick the canonical form */
1290 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1291 return DB_LOCK_DEADLOCK
;
1292 if(kvp_get(t
, "_alias_for"))
1294 /* check that random play is not suppressed for this track */
1295 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1296 && !strcmp(pick_at_random
, "0"))
1298 /* don't pick a track that's been played in the last 8 hours */
1299 if((played_time
= kvp_get(p
, "played_time"))) {
1300 last
= atoll(played_time
);
1302 if(now
< last
+ 8 * 3600) /* TODO configurable */
1305 track_tags
= parsetags(kvp_get(p
, "tags"));
1306 /* check that no prohibited tag is present for this track */
1307 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1309 /* check that at least one required tags is present for this track */
1310 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1315 /* attempt to pick a random non-alias track */
1316 const char *trackdb_random(int tries
) {
1321 const char *track
, *candidate
;
1324 char **required_tags
, **prohibited_tags
, **tp
;
1329 tid
= trackdb_begin_transaction();
1330 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1332 required_tags
= parsetags(tags
);
1333 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1335 prohibited_tags
= parsetags(tags
);
1337 if(*required_tags
) {
1338 /* Bung all the suitable tracks into a hash and convert to a list of keys
1339 * (to eliminate duplicates). We cache this list since it is possible
1340 * that it will be very large. */
1343 for(tp
= required_tags
; *tp
; ++tp
) {
1344 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1345 memset(&key
, 0, sizeof key
);
1347 key
.size
= strlen(*tp
);
1349 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1351 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1352 HASH_INSERT_OR_REPLACE
);
1354 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1360 case DB_LOCK_DEADLOCK
:
1363 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1365 trackdb_closecursor(c
);
1368 error(0, "required tag %s does not match any tracks", *tp
);
1370 nreqtracks
= hash_count(h
);
1371 reqtracks
= hash_keys(h
);
1373 while(nreqtracks
&& !track
&& tries
-- > 0) {
1374 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1375 candidate
= reqtracks
[r
];
1376 switch(check_suitable(candidate
, tid
,
1377 required_tags
, prohibited_tags
)) {
1383 case DB_LOCK_DEADLOCK
:
1388 /* No required tags. We pick random record numbers in the database
1390 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1393 case DB_LOCK_DEADLOCK
:
1394 error(0, "error querying tracks.db: %s", db_strerror(err
));
1397 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1400 error(0, "cannot pick tracks at random from an empty database");
1401 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1402 /* record numbers count from 1 upwards */
1403 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1404 memset(&key
, sizeof key
, 0);
1405 key
.flags
= DB_DBT_MALLOC
;
1406 key
.size
= sizeof r
;
1408 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1412 case DB_LOCK_DEADLOCK
:
1413 error(0, "error querying tracks.db: %s", db_strerror(err
));
1416 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1418 candidate
= xstrndup(key
.data
, key
.size
);
1419 switch(check_suitable(candidate
, tid
,
1420 required_tags
, prohibited_tags
)) {
1426 case DB_LOCK_DEADLOCK
:
1433 trackdb_closecursor(c
);
1435 trackdb_abort_transaction(tid
);
1437 trackdb_commit_transaction(tid
);
1439 error(0, "could not pick a random track");
1443 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1444 * from the prefs. */
1445 static const char *getpart(const char *track
,
1446 const char *context
,
1448 const struct kvp
*p
,
1453 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1454 if((result
= kvp_get(p
, pref
)))
1457 result
= trackname_part(track
, context
, part
);
1458 assert(result
!= 0);
1462 /* get a track name part, like trackname_part(), but taking the database into
1464 const char *trackdb_getpart(const char *track
,
1465 const char *context
,
1473 /* construct the full pref */
1474 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1476 tid
= trackdb_begin_transaction();
1477 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1481 trackdb_abort_transaction(tid
);
1483 trackdb_commit_transaction(tid
);
1484 return getpart(actual
, context
, part
, p
, &used_db
);
1487 /* get the raw path name for @track@ (might be an alias) */
1488 const char *trackdb_rawpath(const char *track
) {
1494 tid
= trackdb_begin_transaction();
1495 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1499 trackdb_abort_transaction(tid
);
1501 trackdb_commit_transaction(tid
);
1502 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1506 /* trackdb_list **************************************************************/
1508 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1509 * readable at some point */
1511 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1512 * If RE is a null pointer then it matches everything. */
1513 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1521 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1522 case PCRE_ERROR_NOMATCH
: return 0;
1525 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1532 static int do_list(struct vector
*v
, const char *dir
,
1533 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1539 size_t l
, last_dir_len
= 0;
1540 char *last_dir
= 0, *track
, *alias
;
1544 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1547 /* find the first key >= dir */
1548 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1549 /* keep going while we're dealing with <dir/anything> */
1552 && ((char *)k
.data
)[dl
] == '/'
1553 && !memcmp(k
.data
, dir
, dl
)) {
1554 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1556 /* we have <dir/component/anything>, so <dir/component> is a directory */
1557 l
= ptr
- (char *)k
.data
;
1558 if(what
& trackdb_directories
)
1560 && l
== last_dir_len
1561 && !memcmp(last_dir
, k
.data
, l
))) {
1562 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1563 if(track_matches(dl
, k
.data
, l
, re
))
1564 vector_append(v
, last_dir
);
1567 /* found a plain file */
1568 if((what
& trackdb_files
)) {
1569 track
= xstrndup(k
.data
, k
.size
);
1570 if((err
= trackdb_getdata(trackdb_prefsdb
,
1571 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1573 /* if this file has an alias in the same directory then we skip it */
1574 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1576 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1577 if(track_matches(dl
, k
.data
, k
.size
, re
))
1578 vector_append(v
, track
);
1581 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1589 case DB_LOCK_DEADLOCK
:
1590 error(0, "error querying database: %s", db_strerror(err
));
1593 fatal(0, "error querying database: %s", db_strerror(err
));
1596 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1600 /* return the directories or files below @dir@ */
1601 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1609 tid
= trackdb_begin_transaction();
1612 if(do_list(&v
, dir
, what
, re
, tid
))
1615 for(n
= 0; n
< config
->collection
.n
; ++n
)
1616 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1621 trackdb_abort_transaction(tid
);
1623 trackdb_commit_transaction(tid
);
1624 vector_terminate(&v
);
1630 /* If S is tag:something, return something. Else return 0. */
1631 static const char *checktag(const char *s
) {
1632 if(!strncmp(s
, "tag:", 4))
1638 /* return a list of tracks containing all of the words given. If you
1639 * ask for only stopwords you get no tracks. */
1640 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1641 const char **w
, *best
= 0, *tag
;
1642 char **twords
, **tags
;
1643 int i
, j
, n
, err
, what
;
1653 *ntracks
= 0; /* for early returns */
1654 /* casefold all the words */
1655 w
= xmalloc(nwordlist
* sizeof (char *));
1656 for(n
= 0; n
< nwordlist
; ++n
) {
1657 w
[n
] = casefold(wordlist
[n
]);
1658 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1660 /* find the longest non-stopword */
1661 for(n
= 0; n
< nwordlist
; ++n
)
1662 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1663 if(!best
|| strlen(w
[n
]) > strlen(best
))
1665 /* TODO: we should at least in principal be able to identify the word or tag
1666 * with the least matches in log time, and choose that as our primary search
1668 if(ntags
&& !best
) {
1669 /* Only tags are listed. We limit to the first and narrow down with the
1671 best
= checktag(w
[0]);
1672 db
= trackdb_tagsdb
;
1675 /* We can limit to some word. */
1676 db
= trackdb_searchdb
;
1679 /* Only stopwords */
1685 tid
= trackdb_begin_transaction();
1686 /* find all the tracks that have that word */
1691 cursor
= trackdb_opencursor(db
, tid
);
1692 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1693 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1700 case DB_LOCK_DEADLOCK
:
1701 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1704 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1706 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1708 /* do a naive search over that (hopefuly fairly small) list of tracks */
1710 for(n
= 0; n
< v
.nvec
; ++n
) {
1711 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1714 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1717 twords
= track_to_words(v
.vec
[n
], p
);
1718 tags
= parsetags(kvp_get(p
, "tags"));
1719 for(i
= 0; i
< nwordlist
; ++i
) {
1720 if((tag
= checktag(w
[i
]))) {
1721 /* Track must have this tag */
1722 for(j
= 0; tags
[j
]; ++j
)
1723 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1724 if(!tags
[j
]) break; /* tag not found */
1726 /* Track must contain this word */
1727 for(j
= 0; twords
[j
]; ++j
)
1728 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1729 if(!twords
[j
]) break; /* word not found */
1732 if(i
>= nwordlist
) /* all words found */
1733 vector_append(&u
, v
.vec
[n
]);
1737 trackdb_closecursor(cursor
);
1739 trackdb_abort_transaction(tid
);
1740 info("retrying search");
1742 trackdb_commit_transaction(tid
);
1743 vector_terminate(&u
);
1749 /* trackdb_scan **************************************************************/
1751 int trackdb_scan(const char *root
,
1752 int (*callback
)(const char *track
,
1760 const size_t root_len
= root ?
strlen(root
) : 0;
1765 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1767 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1770 memset(&k
, 0, sizeof k
);
1771 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1776 || (k
.size
> root_len
1777 && !strncmp(k
.data
, root
, root_len
)
1778 && ((char *)k
.data
)[root_len
] == '/')) {
1779 data
= kvp_urldecode(d
.data
, d
.size
);
1780 if(kvp_get(data
, "_path")) {
1781 track
= xstrndup(k
.data
, k
.size
);
1782 /* Advance to the next track before the callback so that the callback
1783 * may safely delete the track */
1784 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1785 if((cberr
= callback(track
, data
, u
, tid
))) {
1790 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1794 trackdb_closecursor(cursor
);
1801 case DB_LOCK_DEADLOCK
:
1802 error(0, "c->c_get: %s", db_strerror(err
));
1805 fatal(0, "c->c_get: %s", db_strerror(err
));
1809 /* trackdb_rescan ************************************************************/
1811 /* called when the rescanner terminates */
1812 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1815 const struct rusage
attribute((unused
)) *rusage
,
1816 void attribute((unused
)) *u
) {
1817 if(pid
== rescan_pid
) rescan_pid
= -1;
1819 error(0, "disorderd-rescan: %s", wstat(status
));
1821 D(("disorderd-rescan terminate: %s", wstat(status
)));
1822 /* Our cache of file lookups is out of date now */
1823 cache_clean(&cache_files_type
);
1824 eventlog("rescanned", (char *)0);
1828 void trackdb_rescan(ev_source
*ev
) {
1829 if(rescan_pid
!= -1) {
1830 error(0, "rescan already underway");
1833 rescan_pid
= subprogram(ev
, RESCAN
, -1);
1834 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1835 D(("started rescanner"));
1839 int trackdb_rescan_cancel(void) {
1840 if(rescan_pid
== -1) return 0;
1841 if(kill(rescan_pid
, SIGTERM
) < 0)
1842 fatal(errno
, "error killing rescanner");
1847 /* global prefs **************************************************************/
1849 void trackdb_set_global(const char *name
,
1857 memset(&k
, 0, sizeof k
);
1858 memset(&d
, 0, sizeof d
);
1859 k
.data
= (void *)name
;
1860 k
.size
= strlen(name
);
1862 d
.data
= (void *)value
;
1863 d
.size
= strlen(value
);
1866 tid
= trackdb_begin_transaction();
1868 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1870 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1871 if(!err
|| err
== DB_NOTFOUND
) break;
1872 if(err
!= DB_LOCK_DEADLOCK
)
1873 fatal(0, "error updating database: %s", db_strerror(err
));
1874 trackdb_abort_transaction(tid
);
1876 trackdb_commit_transaction(tid
);
1877 /* log important state changes */
1878 if(!strcmp(name
, "playing")) {
1879 state
= !value
|| !strcmp(value
, "yes");
1880 info("playing %s by %s",
1881 state ?
"enabled" : "disabled",
1883 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1885 if(!strcmp(name
, "random-play")) {
1886 state
= !value
|| !strcmp(value
, "yes");
1887 info("random play %s by %s",
1888 state ?
"enabled" : "disabled",
1890 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1892 if(!strcmp(name
, "required-tags"))
1896 const char *trackdb_get_global(const char *name
) {
1902 tid
= trackdb_begin_transaction();
1903 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1905 trackdb_abort_transaction(tid
);
1907 trackdb_commit_transaction(tid
);
1911 static int trackdb_get_global_tid(const char *name
,
1917 memset(&k
, 0, sizeof k
);
1918 k
.data
= (void *)name
;
1919 k
.size
= strlen(name
);
1920 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1921 prepare_data(&d
), 0)) {
1923 *rp
= xstrndup(d
.data
, d
.size
);
1928 case DB_LOCK_DEADLOCK
:
1931 fatal(0, "error updating database: %s", db_strerror(err
));
1935 /** @brief Retrieve the most recently added tracks
1936 * @param ntracksp Where to put count, or 0
1937 * @param maxtracks Maximum number of tracks to retrieve
1938 * @return null-terminated array of track names
1940 * The most recently added track is first in the array.
1942 char **trackdb_new(int *ntracksp
,
1948 tid
= trackdb_begin_transaction();
1949 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1952 trackdb_abort_transaction(tid
);
1954 trackdb_commit_transaction(tid
);
1958 /** @brief Retrieve the most recently added tracks
1959 * @param ntracksp Where to put count, or 0
1960 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1961 * @param tid Transaction ID
1962 * @return null-terminated array of track names, or NULL on deadlock
1964 * The most recently added track is first in the array.
1966 static char **trackdb_new_tid(int *ntracksp
,
1972 struct vector tracks
[1];
1974 vector_init(tracks
);
1975 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1976 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1977 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1978 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1980 case 0: /* hit maxtracks */
1981 case DB_NOTFOUND
: /* ran out of tracks */
1983 case DB_LOCK_DEADLOCK
:
1984 trackdb_closecursor(c
);
1987 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
1989 if((err
= trackdb_closecursor(c
)))
1990 return 0; /* deadlock */
1991 vector_terminate(tracks
);
1993 *ntracksp
= tracks
->nvec
;
1997 /** @brief Expire noticed.db
1998 * @param earliest Earliest timestamp to keep
2000 void trackdb_expire_noticed(time_t earliest
) {
2004 tid
= trackdb_begin_transaction();
2005 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2007 trackdb_abort_transaction(tid
);
2009 trackdb_commit_transaction(tid
);
2012 /** @brief Expire noticed.db
2013 * @param earliest Earliest timestamp to keep
2014 * @param tid Transaction ID
2015 * @return 0 or DB_LOCK_DEADLOCK
2017 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2025 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2026 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2028 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2029 if(when
>= earliest
)
2031 if((err
= c
->c_del(c
, 0))) {
2032 if(err
!= DB_LOCK_DEADLOCK
)
2033 fatal(0, "error deleting expired noticed.db entry: %s",
2039 if(err
== DB_NOTFOUND
)
2041 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2042 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2044 if((err
= trackdb_closecursor(c
))) {
2045 if(err
!= DB_LOCK_DEADLOCK
)
2046 fatal(0, "error closing cursor: %s", db_strerror(err
));
2050 info("expired %d tracks from noticed.db", count
);
2054 /* tidying up ****************************************************************/
2056 void trackdb_gc(void) {
2060 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2061 config
->checkpoint_kbyte
,
2062 config
->checkpoint_min
,
2064 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2065 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2066 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2067 /* This makes catastrophic recovery impossible. However, the user can still
2068 * preserve the important data by using disorder-dump to snapshot their
2069 * prefs, and later to restore it. This is likely to have much small
2070 * long-term storage requirements than record the db logfiles. */
2078 indent-tabs-mode:nil