2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
45 #include "configuration.h"
51 #include "trackname.h"
52 #include "trackdb-int.h"
58 #define RESCAN "disorder-rescan"
59 #define DEADLOCK "disorder-deadlock"
61 static const char *getpart(const char *track
,
66 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
);
67 static int trackdb_get_global_tid(const char *name
,
70 static char **trackdb_new_tid(int *ntracksp
,
73 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
75 const struct cache_type cache_files_type
= { 86400 };
76 unsigned long cache_files_hits
, cache_files_misses
;
78 /* setup and teardown ********************************************************/
80 static const char *home
; /* home had better not change */
81 DB_ENV
*trackdb_env
; /* db environment */
82 DB
*trackdb_tracksdb
; /* the db itself */
83 DB
*trackdb_prefsdb
; /* preferences */
84 DB
*trackdb_searchdb
; /* the search database */
85 DB
*trackdb_tagsdb
; /* the tags database */
86 DB
*trackdb_globaldb
; /* global preferences */
87 DB
*trackdb_noticeddb
; /* when track noticed */
88 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
89 static pid_t rescan_pid
= -1; /* rescanner PID */
90 static int initialized
, opened
; /* state */
92 /* tracks matched by required_tags */
93 static char **reqtracks
;
94 static size_t nreqtracks
;
96 /* comparison function for keys */
97 static int compare(DB
attribute((unused
)) *db_
,
98 const DBT
*a
, const DBT
*b
) {
99 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
102 /* open environment */
103 void trackdb_init(int recover
) {
105 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
108 assert(initialized
== 0);
111 if(strcmp(home
, config
->home
))
112 fatal(0, "cannot change db home without server restart");
116 /* create environment */
117 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
119 if((err
= trackdb_env
->set_alloc(trackdb_env
,
120 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
121 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
122 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
123 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
124 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
125 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
126 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
132 |recover_type
[recover
],
134 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
135 trackdb_env
->set_errpfx(trackdb_env
, "DB");
136 trackdb_env
->set_errfile(trackdb_env
, stderr
);
137 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
138 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
139 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
140 D(("initialized database environment"));
143 /* called when deadlock manager terminates */
144 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
145 pid_t
attribute((unused
)) pid
,
147 const struct rusage
attribute((unused
)) *rusage
,
148 void attribute((unused
)) *u
) {
149 db_deadlock_pid
= -1;
151 fatal(0, "deadlock manager unexpectedly terminated: %s",
154 D(("deadlock manager terminated: %s", wstat(status
)));
158 static pid_t
subprogram(ev_source
*ev
, const char *prog
,
162 /* If we're in the background then trap subprocess stdout/stderr */
163 if(!(pid
= xfork())) {
165 ev_signal_atfork(ev
);
166 signal(SIGPIPE
, SIG_DFL
);
171 /* If we were negatively niced, undo it. We don't bother checking for
172 * error, it's not that important. */
173 setpriority(PRIO_PROCESS
, 0, 0);
174 execlp(prog
, prog
, "--config", configfile
,
175 debugging ?
"--debug" : "--no-debug",
176 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
178 fatal(errno
, "error invoking %s", prog
);
183 /* start deadlock manager */
184 void trackdb_master(ev_source
*ev
) {
185 assert(db_deadlock_pid
== -1);
186 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
187 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
188 D(("started deadlock manager"));
191 /* close environment */
192 void trackdb_deinit(void) {
196 assert(initialized
== 1);
199 /* close the environment */
200 if((err
= trackdb_env
->close(trackdb_env
, 0)))
201 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
203 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
204 fatal(errno
, "error killing rescanner");
206 /* terminate the deadlock manager */
207 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
208 fatal(errno
, "error killing deadlock manager");
209 db_deadlock_pid
= -1;
211 D(("deinitialized database environment"));
214 /* open a specific database */
215 static DB
*open_db(const char *path
,
223 D(("open %s", path
));
224 path
= config_get_file(path
);
225 if((err
= db_create(&db
, trackdb_env
, 0)))
226 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
228 if((err
= db
->set_flags(db
, dbflags
)))
229 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
230 if(dbtype
== DB_BTREE
)
231 if((err
= db
->set_bt_compare(db
, compare
)))
232 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
233 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
234 openflags
| DB_AUTO_COMMIT
, mode
)))
235 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
239 /* open track databases */
240 void trackdb_open(void) {
244 /* open the databases */
245 trackdb_tracksdb
= open_db("tracks.db",
246 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
247 trackdb_searchdb
= open_db("search.db",
248 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
249 trackdb_tagsdb
= open_db("tags.db",
250 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
251 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
252 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
253 trackdb_noticeddb
= open_db("noticed.db",
254 DB_DUPSORT
, DB_BTREE
, DB_CREATE
, 0666);
255 D(("opened databases"));
258 /* close track databases */
259 void trackdb_close(void) {
265 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
266 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
267 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
268 fatal(0, "error closing search.db: %s", db_strerror(err
));
269 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
270 fatal(0, "error closing tags.db: %s", db_strerror(err
));
271 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
272 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
273 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
274 fatal(0, "error closing global.db: %s", db_strerror(err
));
275 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
276 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
277 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
278 trackdb_tagsdb
= trackdb_globaldb
= 0;
279 D(("closed databases"));
282 /* generic db routines *******************************************************/
284 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
285 * DB_LOCK_DEADLOCK. */
286 int trackdb_getdata(DB
*db
,
293 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
294 prepare_data(&data
), 0)) {
296 *kp
= kvp_urldecode(data
.data
, data
.size
);
301 case DB_LOCK_DEADLOCK
:
302 error(0, "error querying database: %s", db_strerror(err
));
305 fatal(0, "error querying database: %s", db_strerror(err
));
309 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
310 * DB_LOCK_DEADLOCK. */
311 int trackdb_putdata(DB
*db
,
319 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
320 encode_data(&data
, k
), flags
)) {
324 case DB_LOCK_DEADLOCK
:
325 error(0, "error updating database: %s", db_strerror(err
));
328 fatal(0, "error updating database: %s", db_strerror(err
));
332 /* delete a database entry */
333 int trackdb_delkey(DB
*db
,
339 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
343 case DB_LOCK_DEADLOCK
:
344 error(0, "error updating database: %s", db_strerror(err
));
347 fatal(0, "error updating database: %s", db_strerror(err
));
351 /* open a database cursor */
352 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
356 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
358 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
363 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
364 int trackdb_closecursor(DBC
*c
) {
368 switch(err
= c
->c_close(c
)) {
371 case DB_LOCK_DEADLOCK
:
372 error(0, "error closing cursor: %s", db_strerror(err
));
375 fatal(0, "error closing cursor: %s", db_strerror(err
));
379 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
380 int trackdb_delkeydata(DB
*db
,
388 c
= trackdb_opencursor(db
, tid
);
389 switch(err
= c
->c_get(c
, make_key(&key
, word
),
390 make_key(&data
, track
), DB_GET_BOTH
)) {
392 switch(err
= c
->c_del(c
, 0)) {
398 case DB_LOCK_DEADLOCK
:
399 error(0, "error updating database: %s", db_strerror(err
));
402 fatal(0, "c->c_del: %s", db_strerror(err
));
407 case DB_LOCK_DEADLOCK
:
408 error(0, "error updating database: %s", db_strerror(err
));
411 fatal(0, "c->c_get: %s", db_strerror(err
));
413 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
417 /* start a transaction */
418 DB_TXN
*trackdb_begin_transaction(void) {
422 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
423 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
427 /* abort transaction */
428 void trackdb_abort_transaction(DB_TXN
*tid
) {
432 if((err
= tid
->abort(tid
)))
433 fatal(0, "tid->abort: %s", db_strerror(err
));
436 /* commit transaction */
437 void trackdb_commit_transaction(DB_TXN
*tid
) {
440 if((err
= tid
->commit(tid
, 0)))
441 fatal(0, "tid->commit: %s", db_strerror(err
));
444 /* search/tags shared code ***************************************************/
446 /* comparison function used by dedupe() */
447 static int wordcmp(const void *a
, const void *b
) {
448 return strcmp(*(const char **)a
, *(const char **)b
);
451 /* sort and de-dupe VEC */
452 static char **dedupe(char **vec
, int nvec
) {
455 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
459 for(n
= 1; n
< nvec
; ++n
)
460 if(strcmp(vec
[n
], vec
[m
- 1]))
467 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
468 static int register_word(DB
*db
, const char *what
,
469 const char *track
, const char *word
,
474 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
475 make_key(&data
, track
), DB_NODUPDATA
)) {
479 case DB_LOCK_DEADLOCK
:
480 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
483 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
487 /* search primitives *********************************************************/
489 /* return true iff NAME is a trackname_display_ pref */
490 static int is_display_pref(const char *name
) {
491 static const char prefix
[] = "trackname_display_";
492 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
495 /* compute the words of a track name */
496 static char **track_to_words(const char *track
,
497 const struct kvp
*p
) {
501 const char *rootless
= track_rootless(track
);
504 rootless
= track
; /* bodge */
506 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
507 vector_append_many(&v
, w
, nw
);
509 for(; p
; p
= p
->next
)
510 if(is_display_pref(p
->name
))
511 if((w
= words(casefold(p
->value
), &nw
)))
512 vector_append_many(&v
, w
, nw
);
513 vector_terminate(&v
);
514 return dedupe(v
.vec
, v
.nvec
);
517 /* return nonzero iff WORD is a stopword */
518 static int stopword(const char *word
) {
521 for(n
= 0; n
< config
->stopword
.n
522 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
524 return n
< config
->stopword
.n
;
527 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
528 static int register_search_word(const char *track
, const char *word
,
530 if(stopword(word
)) return 0;
531 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
534 /* Tags **********************************************************************/
536 /* Return nonzero if C is a valid tag character */
537 static int tagchar(int c
) {
546 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
547 static char **parsetags(const char *s
) {
553 /* skip initial separators */
554 while(*s
&& (!tagchar(*s
) || *s
== ' '))
557 /* find the extent of the tag */
559 while(*s
&& tagchar(*s
))
561 /* strip trailing spaces */
562 while(s
> t
&& s
[-1] == ' ')
564 vector_append(&v
, xstrndup(t
, s
- t
));
565 /* skip intermediate and trailing separators */
566 while(*s
&& (!tagchar(*s
) || *s
== ' '))
570 vector_terminate(&v
);
571 return dedupe(v
.vec
, v
.nvec
);
574 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
575 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
576 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
579 /* aliases *******************************************************************/
581 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
582 * there is no alias sets *aliasp to 0. */
583 static int compute_alias(char **aliasp
,
588 const char *s
= config
->alias
, *t
, *expansion
, *part
;
589 int c
, used_db
= 0, slash_prefix
, err
;
591 const char *const root
= find_track_root(track
);
594 /* Bodge for tracks with no root */
599 dynstr_append_string(&d
, root
);
600 while((c
= (unsigned char)*s
++)) {
602 dynstr_append(&d
, c
);
605 if((slash_prefix
= (*s
== '/')))
608 assert(t
!= 0); /* validated at startup */
609 part
= xstrndup(s
, t
- s
);
610 expansion
= getpart(track
, "display", part
, p
, &used_db
);
612 if(slash_prefix
) dynstr_append(&d
, '/');
613 dynstr_append_string(&d
, expansion
);
615 s
= t
+ 1; /* skip {part} */
617 /* only admit to the alias if we used the db... */
622 dynstr_terminate(&d
);
623 /* ...and the answer differs from the original... */
624 if(!strcmp(track
, d
.vec
)) {
628 /* ...and there isn't already a different track with that name (including as
630 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
632 if((s
= kvp_get(at
, "_alias_for"))
633 && !strcmp(s
, track
)) {
645 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
646 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
647 * Always sets the return values, even if only to null pointers. */
648 static int gettrackdata(const char *track
,
651 const char **actualp
,
653 #define GTD_NOALIAS 0x0001
656 const char *actual
= track
;
657 struct kvp
*t
= 0, *p
= 0;
659 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
660 if((actual
= kvp_get(t
, "_alias_for"))) {
661 if(flags
& GTD_NOALIAS
) {
662 error(0, "alias passed to gettrackdata where real path required");
665 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
670 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
675 if(actualp
) *actualp
= actual
;
681 /* trackdb_notice() **********************************************************/
683 /** @brief notice a possibly new track
684 * @return @c DB_NOTFOUND if new, 0 if already known
686 int trackdb_notice(const char *track
,
692 tid
= trackdb_begin_transaction();
693 err
= trackdb_notice_tid(track
, path
, tid
);
694 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
697 trackdb_abort_transaction(tid
);
699 trackdb_commit_transaction(tid
);
703 /** @brief notice a possibly new track
704 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
706 int trackdb_notice_tid(const char *track
,
710 struct kvp
*t
, *a
, *p
;
714 /* notice whether the tracks.db entry changes */
716 /* get any existing tracks entry */
717 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
719 ret
= err
; /* 0 or DB_NOTFOUND */
720 /* this is a real track */
721 t_changed
+= kvp_set(&t
, "_alias_for", 0);
722 t_changed
+= kvp_set(&t
, "_path", path
);
723 /* if we have an alias record it in the database */
724 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
726 /* won't overwrite someone else's alias as compute_alias() checks */
727 D(("%s: alias %s", track
, alias
));
729 kvp_set(&a
, "_alias_for", track
);
730 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
732 /* update search.db */
733 w
= track_to_words(track
, p
);
734 for(n
= 0; w
[n
]; ++n
)
735 if((err
= register_search_word(track
, w
[n
], tid
)))
738 w
= parsetags(kvp_get(p
, "tags"));
739 for(n
= 0; w
[n
]; ++n
)
740 if((err
= register_tag(track
, w
[n
], tid
)))
743 /* only store the tracks.db entry if it has changed */
744 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
746 if(ret
== DB_NOTFOUND
) {
747 uint32_t timestamp
[2];
752 timestamp
[0] = htonl((uint64_t)now
>> 32);
753 timestamp
[1] = htonl((uint32_t)now
);
754 memset(&key
, 0, sizeof key
);
755 key
.data
= timestamp
;
756 key
.size
= sizeof timestamp
;
757 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
758 make_key(&data
, track
), 0)) {
760 case DB_LOCK_DEADLOCK
: return err
;
761 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
767 /* trackdb_obsolete() ********************************************************/
769 /* obsolete a track */
770 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
775 if((err
= gettrackdata(track
, 0, &p
, 0,
776 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
778 else if(err
== DB_NOTFOUND
) return 0;
779 /* compute the alias, if any, and delete it */
780 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
782 /* if the alias points to some other track then compute_alias won't
784 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
787 /* update search.db */
788 w
= track_to_words(track
, p
);
789 for(n
= 0; w
[n
]; ++n
)
790 if(trackdb_delkeydata(trackdb_searchdb
,
791 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
794 w
= parsetags(kvp_get(p
, "tags"));
795 for(n
= 0; w
[n
]; ++n
)
796 if(trackdb_delkeydata(trackdb_tagsdb
,
797 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
800 /* update tracks.db */
801 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
803 /* We don't delete the prefs, so they survive temporary outages of the
804 * (possibly virtual) track filesystem */
808 /* trackdb_stats() ***********************************************************/
810 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
811 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
813 static const struct statinfo
{
816 } statinfo_hash
[] = {
832 }, statinfo_btree
[] = {
853 /* look up stats for DB */
854 static int get_stats(struct vector
*v
,
856 const struct statinfo
*si
,
865 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
868 case DB_LOCK_DEADLOCK
:
869 error(0, "error querying database: %s", db_strerror(err
));
872 fatal(0, "error querying database: %s", db_strerror(err
));
874 for(n
= 0; n
< nsi
; ++n
) {
875 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
876 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
877 vector_append(v
, str
);
883 struct search_entry
{
888 /* find the top COUNT words in the search database */
889 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
890 struct search_entry
*se
;
893 int err
, n
= 0, nse
= 0, i
;
898 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
899 se
= xmalloc(count
* sizeof *se
);
900 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
902 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
905 #define FINALIZE() do { \
906 if(word && (nse < count || n > se[nse - 1].n)) { \
911 while(i > 0 && n > se[i - 1].n) \
913 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
919 word
= xstrndup(k
.data
, wl
= k
.size
);
927 case DB_LOCK_DEADLOCK
:
928 error(0, "error querying search database: %s", db_strerror(err
));
931 fatal(0, "error querying search database: %s", db_strerror(err
));
933 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
936 byte_xasprintf(&str
, "Top %d search words:", nse
);
937 vector_append(v
, str
);
938 for(i
= 0; i
< nse
; ++i
) {
939 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
940 vector_append(v
, str
);
945 #define SI(what) statinfo_##what, \
946 sizeof statinfo_##what / sizeof (struct statinfo)
948 /* return a list of database stats */
949 char **trackdb_stats(int *nstatsp
) {
955 tid
= trackdb_begin_transaction();
957 vector_append(&v
, (char *)"Tracks database stats:");
958 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
959 vector_append(&v
, (char *)"");
960 vector_append(&v
, (char *)"Search database stats:");
961 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
962 vector_append(&v
, (char *)"");
963 vector_append(&v
, (char *)"Prefs database stats:");
964 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
965 vector_append(&v
, (char *)"");
966 if(search_league(&v
, 10, tid
)) goto fail
;
967 vector_terminate(&v
);
970 trackdb_abort_transaction(tid
);
972 trackdb_commit_transaction(tid
);
973 if(nstatsp
) *nstatsp
= v
.nvec
;
977 struct stats_details
{
978 void (*done
)(char *data
, void *u
);
980 int exited
; /* subprocess exited */
981 int closed
; /* pipe close */
982 int wstat
; /* wait status from subprocess */
983 struct dynstr data
[1]; /* data read from pipe */
986 static void stats_complete(struct stats_details
*d
) {
989 if(!(d
->exited
&& d
->closed
))
991 byte_xasprintf(&s
, "\n"
993 "track lookup cache hits: %lu\n"
994 "track lookup cache misses: %lu\n",
997 dynstr_append_string(d
->data
, s
);
998 dynstr_terminate(d
->data
);
999 d
->done(d
->data
->vec
, d
->u
);
1002 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1003 pid_t
attribute((unused
)) pid
,
1005 const struct rusage
attribute((unused
)) *rusage
,
1007 struct stats_details
*const d
= u
;
1011 error(0, "disorder-stats %s", wstat(status
));
1016 static int stats_read(ev_source
attribute((unused
)) *ev
,
1022 struct stats_details
*const d
= u
;
1024 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1025 ev_reader_consume(reader
, bytes
);
1032 static int stats_error(ev_source
attribute((unused
)) *ev
,
1035 struct stats_details
*const d
= u
;
1037 error(errno_value
, "error reading from pipe to disorder-stats");
1043 void trackdb_stats_subprocess(ev_source
*ev
,
1044 void (*done
)(char *data
, void *u
),
1048 struct stats_details
*d
= xmalloc(sizeof *d
);
1050 dynstr_init(d
->data
);
1054 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1056 ev_child(ev
, pid
, 0, stats_finished
, d
);
1057 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1060 /* set a pref (remove if value=0) */
1061 int trackdb_set(const char *track
,
1063 const char *value
) {
1064 struct kvp
*t
, *p
, *a
;
1067 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1070 /* TODO: if value matches default then set value=0 */
1074 tid
= trackdb_begin_transaction();
1075 if((err
= gettrackdata(track
, &t
, &p
, 0,
1076 0, tid
)) == DB_LOCK_DEADLOCK
)
1078 if(err
== DB_NOTFOUND
) break;
1079 if(name
[0] == '_') {
1080 if(kvp_set(&t
, name
, value
))
1081 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1084 /* get the old alias name */
1085 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1086 /* get the old tags */
1087 if(!strcmp(name
, "tags"))
1088 oldtags
= parsetags(kvp_get(p
, "tags"));
1090 if(kvp_set(&p
, name
, value
))
1091 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1093 /* compute the new alias name */
1094 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1095 /* check whether alias has changed */
1096 if(!(oldalias
== newalias
1097 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1098 /* adjust alias records to fit change */
1100 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
1103 kvp_set(&a
, "_alias_for", track
);
1104 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1107 /* check whether tags have changed */
1108 if(!strcmp(name
, "tags")) {
1109 newtags
= parsetags(value
);
1110 while(*oldtags
|| *newtags
) {
1111 if(*oldtags
&& *newtags
) {
1112 cmp
= strcmp(*oldtags
, *newtags
);
1114 /* keeping this tag */
1118 /* old tag fits into a gap in the new list, so delete old */
1121 /* new tag fits into a gap in the old list, so insert new */
1123 } else if(*oldtags
) {
1124 /* we've run out of new tags, so remaining old ones are to be
1127 if(trackdb_delkeydata(trackdb_tagsdb
,
1128 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1132 /* we've run out of old tags, so remainig new ones are to be
1135 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1145 trackdb_abort_transaction(tid
);
1147 trackdb_commit_transaction(tid
);
1148 return err
== 0 ?
0 : -1;
1152 const char *trackdb_get(const char *track
,
1154 return kvp_get(trackdb_get_all(track
), name
);
1157 /* get all prefs as a 0-terminated array */
1158 struct kvp
*trackdb_get_all(const char *track
) {
1159 struct kvp
*t
, *p
, **pp
;
1163 tid
= trackdb_begin_transaction();
1164 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1168 trackdb_abort_transaction(tid
);
1170 trackdb_commit_transaction(tid
);
1171 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1178 const char *trackdb_resolve(const char *track
) {
1183 tid
= trackdb_begin_transaction();
1184 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1188 trackdb_abort_transaction(tid
);
1190 trackdb_commit_transaction(tid
);
1194 int trackdb_isalias(const char *track
) {
1195 const char *actual
= trackdb_resolve(track
);
1197 return strcmp(actual
, track
);
1200 /* test whether a track exists (perhaps an alias) */
1201 int trackdb_exists(const char *track
) {
1206 tid
= trackdb_begin_transaction();
1207 /* unusually, here we want the return value */
1208 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1212 trackdb_abort_transaction(tid
);
1214 trackdb_commit_transaction(tid
);
1218 /* return the list of tags */
1219 char **trackdb_alltags(void) {
1225 tid
= trackdb_begin_transaction();
1226 err
= trackdb_alltags_tid(tid
, &taglist
);
1228 trackdb_abort_transaction(tid
);
1230 trackdb_commit_transaction(tid
);
1234 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1241 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1242 memset(&k
, 0, sizeof k
);
1243 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1244 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1248 case DB_LOCK_DEADLOCK
:
1251 fatal(0, "c->c_get: %s", db_strerror(err
));
1253 if((err
= trackdb_closecursor(c
))) return err
;
1254 vector_terminate(&v
);
1259 /* return 1 iff sorted tag lists A and B have at least one member in common */
1260 static int tag_intersection(char **a
, char **b
) {
1263 /* Same sort of logic as trackdb_set() above */
1265 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1266 else if(cmp
< 0) ++a
;
1272 /* Check whether a track is suitable for random play. Returns 0 if it is,
1273 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1275 static int check_suitable(const char *track
,
1277 char **required_tags
,
1278 char **prohibited_tags
) {
1282 const char *pick_at_random
, *played_time
;
1284 /* don't pick tracks that aren't in any surviving collection (for instance
1285 * you've edited the config but the rescan hasn't done its job yet) */
1286 if(!find_track_root(track
)) {
1287 info("found track not in any collection: %s", track
);
1290 /* don't pick aliases - only pick the canonical form */
1291 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1292 return DB_LOCK_DEADLOCK
;
1293 if(kvp_get(t
, "_alias_for"))
1295 /* check that random play is not suppressed for this track */
1296 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1297 && !strcmp(pick_at_random
, "0"))
1299 /* don't pick a track that's been played in the last 8 hours */
1300 if((played_time
= kvp_get(p
, "played_time"))) {
1301 last
= atoll(played_time
);
1303 if(now
< last
+ 8 * 3600) /* TODO configurable */
1306 track_tags
= parsetags(kvp_get(p
, "tags"));
1307 /* check that no prohibited tag is present for this track */
1308 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1310 /* check that at least one required tags is present for this track */
1311 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1316 /* attempt to pick a random non-alias track */
1317 const char *trackdb_random(int tries
) {
1322 const char *track
, *candidate
;
1325 char **required_tags
, **prohibited_tags
, **tp
;
1330 tid
= trackdb_begin_transaction();
1331 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1333 required_tags
= parsetags(tags
);
1334 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1336 prohibited_tags
= parsetags(tags
);
1338 if(*required_tags
) {
1339 /* Bung all the suitable tracks into a hash and convert to a list of keys
1340 * (to eliminate duplicates). We cache this list since it is possible
1341 * that it will be very large. */
1344 for(tp
= required_tags
; *tp
; ++tp
) {
1345 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1346 memset(&key
, 0, sizeof key
);
1348 key
.size
= strlen(*tp
);
1350 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1352 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1353 HASH_INSERT_OR_REPLACE
);
1355 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1361 case DB_LOCK_DEADLOCK
:
1364 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1366 trackdb_closecursor(c
);
1369 error(0, "required tag %s does not match any tracks", *tp
);
1371 nreqtracks
= hash_count(h
);
1372 reqtracks
= hash_keys(h
);
1374 while(nreqtracks
&& !track
&& tries
-- > 0) {
1375 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1376 candidate
= reqtracks
[r
];
1377 switch(check_suitable(candidate
, tid
,
1378 required_tags
, prohibited_tags
)) {
1384 case DB_LOCK_DEADLOCK
:
1389 /* No required tags. We pick random record numbers in the database
1391 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1394 case DB_LOCK_DEADLOCK
:
1395 error(0, "error querying tracks.db: %s", db_strerror(err
));
1398 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1401 error(0, "cannot pick tracks at random from an empty database");
1402 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1403 /* record numbers count from 1 upwards */
1404 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1405 memset(&key
, sizeof key
, 0);
1406 key
.flags
= DB_DBT_MALLOC
;
1407 key
.size
= sizeof r
;
1409 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1413 case DB_LOCK_DEADLOCK
:
1414 error(0, "error querying tracks.db: %s", db_strerror(err
));
1417 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1419 candidate
= xstrndup(key
.data
, key
.size
);
1420 switch(check_suitable(candidate
, tid
,
1421 required_tags
, prohibited_tags
)) {
1427 case DB_LOCK_DEADLOCK
:
1434 trackdb_closecursor(c
);
1436 trackdb_abort_transaction(tid
);
1438 trackdb_commit_transaction(tid
);
1440 error(0, "could not pick a random track");
1444 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1445 * from the prefs. */
1446 static const char *getpart(const char *track
,
1447 const char *context
,
1449 const struct kvp
*p
,
1454 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1455 if((result
= kvp_get(p
, pref
)))
1458 result
= trackname_part(track
, context
, part
);
1459 assert(result
!= 0);
1463 /* get a track name part, like trackname_part(), but taking the database into
1465 const char *trackdb_getpart(const char *track
,
1466 const char *context
,
1474 /* construct the full pref */
1475 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1477 tid
= trackdb_begin_transaction();
1478 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1482 trackdb_abort_transaction(tid
);
1484 trackdb_commit_transaction(tid
);
1485 return getpart(actual
, context
, part
, p
, &used_db
);
1488 /* get the raw path name for @track@ (might be an alias) */
1489 const char *trackdb_rawpath(const char *track
) {
1495 tid
= trackdb_begin_transaction();
1496 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1500 trackdb_abort_transaction(tid
);
1502 trackdb_commit_transaction(tid
);
1503 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1507 /* trackdb_list **************************************************************/
1509 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1510 * readable at some point */
1512 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1513 * If RE is a null pointer then it matches everything. */
1514 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1522 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1523 case PCRE_ERROR_NOMATCH
: return 0;
1526 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1533 static int do_list(struct vector
*v
, const char *dir
,
1534 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1540 size_t l
, last_dir_len
= 0;
1541 char *last_dir
= 0, *track
, *alias
;
1545 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1548 /* find the first key >= dir */
1549 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1550 /* keep going while we're dealing with <dir/anything> */
1553 && ((char *)k
.data
)[dl
] == '/'
1554 && !memcmp(k
.data
, dir
, dl
)) {
1555 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1557 /* we have <dir/component/anything>, so <dir/component> is a directory */
1558 l
= ptr
- (char *)k
.data
;
1559 if(what
& trackdb_directories
)
1561 && l
== last_dir_len
1562 && !memcmp(last_dir
, k
.data
, l
))) {
1563 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1564 if(track_matches(dl
, k
.data
, l
, re
))
1565 vector_append(v
, last_dir
);
1568 /* found a plain file */
1569 if((what
& trackdb_files
)) {
1570 track
= xstrndup(k
.data
, k
.size
);
1571 if((err
= trackdb_getdata(trackdb_prefsdb
,
1572 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1574 /* if this file has an alias in the same directory then we skip it */
1575 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1577 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1578 if(track_matches(dl
, k
.data
, k
.size
, re
))
1579 vector_append(v
, track
);
1582 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1590 case DB_LOCK_DEADLOCK
:
1591 error(0, "error querying database: %s", db_strerror(err
));
1594 fatal(0, "error querying database: %s", db_strerror(err
));
1597 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1601 /* return the directories or files below @dir@ */
1602 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1610 tid
= trackdb_begin_transaction();
1613 if(do_list(&v
, dir
, what
, re
, tid
))
1616 for(n
= 0; n
< config
->collection
.n
; ++n
)
1617 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1622 trackdb_abort_transaction(tid
);
1624 trackdb_commit_transaction(tid
);
1625 vector_terminate(&v
);
1631 /* If S is tag:something, return something. Else return 0. */
1632 static const char *checktag(const char *s
) {
1633 if(!strncmp(s
, "tag:", 4))
1639 /* return a list of tracks containing all of the words given. If you
1640 * ask for only stopwords you get no tracks. */
1641 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1642 const char **w
, *best
= 0, *tag
;
1643 char **twords
, **tags
;
1644 int i
, j
, n
, err
, what
;
1654 *ntracks
= 0; /* for early returns */
1655 /* casefold all the words */
1656 w
= xmalloc(nwordlist
* sizeof (char *));
1657 for(n
= 0; n
< nwordlist
; ++n
) {
1658 w
[n
] = casefold(wordlist
[n
]);
1659 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1661 /* find the longest non-stopword */
1662 for(n
= 0; n
< nwordlist
; ++n
)
1663 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1664 if(!best
|| strlen(w
[n
]) > strlen(best
))
1666 /* TODO: we should at least in principal be able to identify the word or tag
1667 * with the least matches in log time, and choose that as our primary search
1669 if(ntags
&& !best
) {
1670 /* Only tags are listed. We limit to the first and narrow down with the
1672 best
= checktag(w
[0]);
1673 db
= trackdb_tagsdb
;
1676 /* We can limit to some word. */
1677 db
= trackdb_searchdb
;
1680 /* Only stopwords */
1686 tid
= trackdb_begin_transaction();
1687 /* find all the tracks that have that word */
1692 cursor
= trackdb_opencursor(db
, tid
);
1693 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1694 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1701 case DB_LOCK_DEADLOCK
:
1702 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1705 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1707 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1709 /* do a naive search over that (hopefuly fairly small) list of tracks */
1711 for(n
= 0; n
< v
.nvec
; ++n
) {
1712 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1715 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1718 twords
= track_to_words(v
.vec
[n
], p
);
1719 tags
= parsetags(kvp_get(p
, "tags"));
1720 for(i
= 0; i
< nwordlist
; ++i
) {
1721 if((tag
= checktag(w
[i
]))) {
1722 /* Track must have this tag */
1723 for(j
= 0; tags
[j
]; ++j
)
1724 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1725 if(!tags
[j
]) break; /* tag not found */
1727 /* Track must contain this word */
1728 for(j
= 0; twords
[j
]; ++j
)
1729 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1730 if(!twords
[j
]) break; /* word not found */
1733 if(i
>= nwordlist
) /* all words found */
1734 vector_append(&u
, v
.vec
[n
]);
1738 trackdb_closecursor(cursor
);
1740 trackdb_abort_transaction(tid
);
1741 info("retrying search");
1743 trackdb_commit_transaction(tid
);
1744 vector_terminate(&u
);
1750 /* trackdb_scan **************************************************************/
1752 int trackdb_scan(const char *root
,
1753 int (*callback
)(const char *track
,
1761 const size_t root_len
= root ?
strlen(root
) : 0;
1766 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1768 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1771 memset(&k
, 0, sizeof k
);
1772 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1777 || (k
.size
> root_len
1778 && !strncmp(k
.data
, root
, root_len
)
1779 && ((char *)k
.data
)[root_len
] == '/')) {
1780 data
= kvp_urldecode(d
.data
, d
.size
);
1781 if(kvp_get(data
, "_path")) {
1782 track
= xstrndup(k
.data
, k
.size
);
1783 /* Advance to the next track before the callback so that the callback
1784 * may safely delete the track */
1785 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1786 if((cberr
= callback(track
, data
, u
, tid
))) {
1791 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1795 trackdb_closecursor(cursor
);
1802 case DB_LOCK_DEADLOCK
:
1803 error(0, "c->c_get: %s", db_strerror(err
));
1806 fatal(0, "c->c_get: %s", db_strerror(err
));
1810 /* trackdb_rescan ************************************************************/
1812 /* called when the rescanner terminates */
1813 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1816 const struct rusage
attribute((unused
)) *rusage
,
1817 void attribute((unused
)) *u
) {
1818 if(pid
== rescan_pid
) rescan_pid
= -1;
1820 error(0, "disorderd-rescan: %s", wstat(status
));
1822 D(("disorderd-rescan terminate: %s", wstat(status
)));
1823 /* Our cache of file lookups is out of date now */
1824 cache_clean(&cache_files_type
);
1825 eventlog("rescanned", (char *)0);
1829 void trackdb_rescan(ev_source
*ev
) {
1831 if(rescan_pid
!= -1) {
1832 error(0, "rescan already underway");
1835 rescan_pid
= subprogram(ev
, RESCAN
, -1);
1837 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1838 D(("started rescanner"));
1840 /* This is the first rescan, we block until it is complete */
1841 while(waitpid(rescan_pid
, &w
, 0) < 0 && errno
== EINTR
)
1843 reap_rescan(0, rescan_pid
, w
, 0, 0);
1847 int trackdb_rescan_cancel(void) {
1848 if(rescan_pid
== -1) return 0;
1849 if(kill(rescan_pid
, SIGTERM
) < 0)
1850 fatal(errno
, "error killing rescanner");
1855 /* global prefs **************************************************************/
1857 void trackdb_set_global(const char *name
,
1865 memset(&k
, 0, sizeof k
);
1866 memset(&d
, 0, sizeof d
);
1867 k
.data
= (void *)name
;
1868 k
.size
= strlen(name
);
1870 d
.data
= (void *)value
;
1871 d
.size
= strlen(value
);
1874 tid
= trackdb_begin_transaction();
1876 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1878 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1879 if(!err
|| err
== DB_NOTFOUND
) break;
1880 if(err
!= DB_LOCK_DEADLOCK
)
1881 fatal(0, "error updating database: %s", db_strerror(err
));
1882 trackdb_abort_transaction(tid
);
1884 trackdb_commit_transaction(tid
);
1885 /* log important state changes */
1886 if(!strcmp(name
, "playing")) {
1887 state
= !value
|| !strcmp(value
, "yes");
1888 info("playing %s by %s",
1889 state ?
"enabled" : "disabled",
1891 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1893 if(!strcmp(name
, "random-play")) {
1894 state
= !value
|| !strcmp(value
, "yes");
1895 info("random play %s by %s",
1896 state ?
"enabled" : "disabled",
1898 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1900 if(!strcmp(name
, "required-tags"))
1904 const char *trackdb_get_global(const char *name
) {
1910 tid
= trackdb_begin_transaction();
1911 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1913 trackdb_abort_transaction(tid
);
1915 trackdb_commit_transaction(tid
);
1919 static int trackdb_get_global_tid(const char *name
,
1925 memset(&k
, 0, sizeof k
);
1926 k
.data
= (void *)name
;
1927 k
.size
= strlen(name
);
1928 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1929 prepare_data(&d
), 0)) {
1931 *rp
= xstrndup(d
.data
, d
.size
);
1936 case DB_LOCK_DEADLOCK
:
1939 fatal(0, "error updating database: %s", db_strerror(err
));
1943 /** @brief Retrieve the most recently added tracks
1944 * @param ntracksp Where to put count, or 0
1945 * @param maxtracks Maximum number of tracks to retrieve
1946 * @return null-terminated array of track names
1948 * The most recently added track is first in the array.
1950 char **trackdb_new(int *ntracksp
,
1956 tid
= trackdb_begin_transaction();
1957 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
1960 trackdb_abort_transaction(tid
);
1962 trackdb_commit_transaction(tid
);
1966 /** @brief Retrieve the most recently added tracks
1967 * @param ntracksp Where to put count, or 0
1968 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1969 * @param tid Transaction ID
1970 * @return null-terminated array of track names, or NULL on deadlock
1972 * The most recently added track is first in the array.
1974 static char **trackdb_new_tid(int *ntracksp
,
1980 struct vector tracks
[1];
1982 vector_init(tracks
);
1983 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
1984 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
1985 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
1986 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
1988 case 0: /* hit maxtracks */
1989 case DB_NOTFOUND
: /* ran out of tracks */
1991 case DB_LOCK_DEADLOCK
:
1992 trackdb_closecursor(c
);
1995 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
1997 if((err
= trackdb_closecursor(c
)))
1998 return 0; /* deadlock */
1999 vector_terminate(tracks
);
2001 *ntracksp
= tracks
->nvec
;
2005 /** @brief Expire noticed.db
2006 * @param earliest Earliest timestamp to keep
2008 void trackdb_expire_noticed(time_t earliest
) {
2012 tid
= trackdb_begin_transaction();
2013 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2015 trackdb_abort_transaction(tid
);
2017 trackdb_commit_transaction(tid
);
2020 /** @brief Expire noticed.db
2021 * @param earliest Earliest timestamp to keep
2022 * @param tid Transaction ID
2023 * @return 0 or DB_LOCK_DEADLOCK
2025 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2033 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2034 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2036 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2037 if(when
>= earliest
)
2039 if((err
= c
->c_del(c
, 0))) {
2040 if(err
!= DB_LOCK_DEADLOCK
)
2041 fatal(0, "error deleting expired noticed.db entry: %s",
2047 if(err
== DB_NOTFOUND
)
2049 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2050 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2052 if((err
= trackdb_closecursor(c
))) {
2053 if(err
!= DB_LOCK_DEADLOCK
)
2054 fatal(0, "error closing cursor: %s", db_strerror(err
));
2058 info("expired %d tracks from noticed.db", count
);
2062 /* tidying up ****************************************************************/
2064 void trackdb_gc(void) {
2068 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2069 config
->checkpoint_kbyte
,
2070 config
->checkpoint_min
,
2072 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2073 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2074 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2075 /* This makes catastrophic recovery impossible. However, the user can still
2076 * preserve the important data by using disorder-dump to snapshot their
2077 * prefs, and later to restore it. This is likely to have much small
2078 * long-term storage requirements than record the db logfiles. */
2086 indent-tabs-mode:nil