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>
43 #include "configuration.h"
49 #include "trackname.h"
50 #include "trackdb-int.h"
56 #define RESCAN "disorder-rescan"
57 #define DEADLOCK "disorder-deadlock"
59 static const char *getpart(const char *track
,
64 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
);
65 static int trackdb_get_global_tid(const char *name
,
69 const struct cache_type cache_files_type
= { 86400 };
70 unsigned long cache_files_hits
, cache_files_misses
;
72 /* setup and teardown ********************************************************/
74 static const char *home
; /* home had better not change */
75 DB_ENV
*trackdb_env
; /* db environment */
76 DB
*trackdb_tracksdb
; /* the db itself */
77 DB
*trackdb_prefsdb
; /* preferences */
78 DB
*trackdb_searchdb
; /* the search database */
79 DB
*trackdb_tagsdb
; /* the tags database */
80 DB
*trackdb_globaldb
; /* global preferences */
81 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
82 static pid_t rescan_pid
= -1; /* rescanner PID */
83 static int initialized
, opened
; /* state */
85 /* tracks matched by required_tags */
86 static char **reqtracks
;
87 static size_t nreqtracks
;
89 /* comparison function for keys */
90 static int compare(DB
attribute((unused
)) *db_
,
91 const DBT
*a
, const DBT
*b
) {
92 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
95 /* open environment */
96 void trackdb_init(int recover
) {
98 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
101 assert(initialized
== 0);
104 if(strcmp(home
, config
->home
))
105 fatal(0, "cannot change db home without server restart");
109 /* create environment */
110 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
112 if((err
= trackdb_env
->set_alloc(trackdb_env
,
113 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
114 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
115 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
116 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
117 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
118 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
119 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
125 |recover_type
[recover
],
127 fatal(0, "trackdb_env->open: %s", db_strerror(err
));
128 trackdb_env
->set_errpfx(trackdb_env
, "DB");
129 trackdb_env
->set_errfile(trackdb_env
, stderr
);
130 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
131 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
132 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
133 D(("initialized database environment"));
136 /* called when deadlock manager terminates */
137 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
138 pid_t
attribute((unused
)) pid
,
140 const struct rusage
attribute((unused
)) *rusage
,
141 void attribute((unused
)) *u
) {
142 db_deadlock_pid
= -1;
144 fatal(0, "deadlock manager unexpectedly terminated: %s",
147 D(("deadlock manager terminated: %s", wstat(status
)));
151 static pid_t
subprogram(ev_source
*ev
, const char *prog
) {
155 /* If we're in the background then trap subprocess stdout/stderr */
157 lfd
= logfd(ev
, prog
);
160 if(!(pid
= xfork())) {
162 ev_signal_atfork(ev
);
163 signal(SIGPIPE
, SIG_DFL
);
168 /* If we were negatively niced, undo it. We don't bother checking for
169 * error, it's not that important. */
170 setpriority(PRIO_PROCESS
, 0, 0);
171 execlp(prog
, prog
, "--config", configfile
,
172 debugging ?
"--debug" : "--no-debug",
174 fatal(errno
, "error invoking %s", prog
);
176 if(lfd
!= -1) xclose(lfd
);
180 /* start deadlock manager */
181 void trackdb_master(ev_source
*ev
) {
182 assert(db_deadlock_pid
== -1);
183 db_deadlock_pid
= subprogram(ev
, DEADLOCK
);
184 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
185 D(("started deadlock manager"));
188 /* close environment */
189 void trackdb_deinit(void) {
193 assert(initialized
== 1);
196 /* close the environment */
197 if((err
= trackdb_env
->close(trackdb_env
, 0)))
198 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
200 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
201 fatal(errno
, "error killing rescanner");
203 /* terminate the deadlock manager */
204 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
205 fatal(errno
, "error killing deadlock manager");
206 db_deadlock_pid
= -1;
208 D(("deinitialized database environment"));
211 /* open a specific database */
212 static DB
*open_db(const char *path
,
220 D(("open %s", path
));
221 path
= config_get_file(path
);
222 if((err
= db_create(&db
, trackdb_env
, 0)))
223 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
225 if((err
= db
->set_flags(db
, dbflags
)))
226 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
227 if(dbtype
== DB_BTREE
)
228 if((err
= db
->set_bt_compare(db
, compare
)))
229 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
230 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
231 openflags
| DB_AUTO_COMMIT
, mode
)))
232 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
236 /* open track databases */
237 void trackdb_open(void) {
241 /* open the databases */
242 trackdb_tracksdb
= open_db("tracks.db",
243 DB_RECNUM
, DB_BTREE
, DB_CREATE
, 0666);
244 trackdb_searchdb
= open_db("search.db",
245 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
246 trackdb_tagsdb
= open_db("tags.db",
247 DB_DUP
|DB_DUPSORT
, DB_HASH
, DB_CREATE
, 0666);
248 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, DB_CREATE
, 0666);
249 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_CREATE
, 0666);
250 D(("opened databases"));
253 /* close track databases */
254 void trackdb_close(void) {
260 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
261 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
262 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
263 fatal(0, "error closing search.db: %s", db_strerror(err
));
264 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
265 fatal(0, "error closing tags.db: %s", db_strerror(err
));
266 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
267 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
268 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
269 fatal(0, "error closing global.db: %s", db_strerror(err
));
270 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
271 trackdb_tagsdb
= trackdb_globaldb
= 0;
272 D(("closed databases"));
275 /* generic db routines *******************************************************/
277 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
278 * DB_LOCK_DEADLOCK. */
279 int trackdb_getdata(DB
*db
,
286 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
287 prepare_data(&data
), 0)) {
289 *kp
= kvp_urldecode(data
.data
, data
.size
);
294 case DB_LOCK_DEADLOCK
:
295 error(0, "error querying database: %s", db_strerror(err
));
298 fatal(0, "error querying database: %s", db_strerror(err
));
302 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
303 * DB_LOCK_DEADLOCK. */
304 int trackdb_putdata(DB
*db
,
312 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
313 encode_data(&data
, k
), flags
)) {
317 case DB_LOCK_DEADLOCK
:
318 error(0, "error updating database: %s", db_strerror(err
));
321 fatal(0, "error updating database: %s", db_strerror(err
));
325 /* delete a database entry */
326 int trackdb_delkey(DB
*db
,
332 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
336 case DB_LOCK_DEADLOCK
:
337 error(0, "error updating database: %s", db_strerror(err
));
340 fatal(0, "error updating database: %s", db_strerror(err
));
344 /* open a database cursor */
345 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
349 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
351 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
356 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
357 int trackdb_closecursor(DBC
*c
) {
361 switch(err
= c
->c_close(c
)) {
364 case DB_LOCK_DEADLOCK
:
365 error(0, "error closing cursor: %s", db_strerror(err
));
368 fatal(0, "error closing cursor: %s", db_strerror(err
));
372 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
373 int trackdb_delkeydata(DB
*db
,
381 c
= trackdb_opencursor(db
, tid
);
382 switch(err
= c
->c_get(c
, make_key(&key
, word
),
383 make_key(&data
, track
), DB_GET_BOTH
)) {
385 switch(err
= c
->c_del(c
, 0)) {
391 case DB_LOCK_DEADLOCK
:
392 error(0, "error updating database: %s", db_strerror(err
));
395 fatal(0, "c->c_del: %s", db_strerror(err
));
400 case DB_LOCK_DEADLOCK
:
401 error(0, "error updating database: %s", db_strerror(err
));
404 fatal(0, "c->c_get: %s", db_strerror(err
));
406 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
410 /* start a transaction */
411 DB_TXN
*trackdb_begin_transaction(void) {
415 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
416 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
420 /* abort transaction */
421 void trackdb_abort_transaction(DB_TXN
*tid
) {
425 if((err
= tid
->abort(tid
)))
426 fatal(0, "tid->abort: %s", db_strerror(err
));
429 /* commit transaction */
430 void trackdb_commit_transaction(DB_TXN
*tid
) {
433 if((err
= tid
->commit(tid
, 0)))
434 fatal(0, "tid->commit: %s", db_strerror(err
));
437 /* search/tags shared code ***************************************************/
439 /* comparison function used by dedupe() */
440 static int wordcmp(const void *a
, const void *b
) {
441 return strcmp(*(const char **)a
, *(const char **)b
);
444 /* sort and de-dupe VEC */
445 static char **dedupe(char **vec
, int nvec
) {
448 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
452 for(n
= 1; n
< nvec
; ++n
)
453 if(strcmp(vec
[n
], vec
[m
- 1]))
460 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
461 static int register_word(DB
*db
, const char *what
,
462 const char *track
, const char *word
,
467 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
468 make_key(&data
, track
), DB_NODUPDATA
)) {
472 case DB_LOCK_DEADLOCK
:
473 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
476 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
480 /* search primitives *********************************************************/
482 /* return true iff NAME is a trackname_display_ pref */
483 static int is_display_pref(const char *name
) {
484 static const char prefix
[] = "trackname_display_";
485 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
488 /* compute the words of a track name */
489 static char **track_to_words(const char *track
,
490 const struct kvp
*p
) {
494 const char *rootless
= track_rootless(track
);
497 rootless
= track
; /* bodge */
499 if((w
= words(casefold(strip_extension(rootless
)), &nw
)))
500 vector_append_many(&v
, w
, nw
);
502 for(; p
; p
= p
->next
)
503 if(is_display_pref(p
->name
))
504 if((w
= words(casefold(p
->value
), &nw
)))
505 vector_append_many(&v
, w
, nw
);
506 vector_terminate(&v
);
507 return dedupe(v
.vec
, v
.nvec
);
510 /* return nonzero iff WORD is a stopword */
511 static int stopword(const char *word
) {
514 for(n
= 0; n
< config
->stopword
.n
515 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
517 return n
< config
->stopword
.n
;
520 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
521 static int register_search_word(const char *track
, const char *word
,
523 if(stopword(word
)) return 0;
524 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
527 /* Tags **********************************************************************/
529 /* Return nonzero if C is a valid tag character */
530 static int tagchar(int c
) {
539 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
540 static char **parsetags(const char *s
) {
546 /* skip initial separators */
547 while(*s
&& (!tagchar(*s
) || *s
== ' '))
550 /* find the extent of the tag */
552 while(*s
&& tagchar(*s
))
554 /* strip trailing spaces */
555 while(s
> t
&& s
[-1] == ' ')
557 vector_append(&v
, xstrndup(t
, s
- t
));
558 /* skip intermediate and trailing separators */
559 while(*s
&& (!tagchar(*s
) || *s
== ' '))
563 vector_terminate(&v
);
564 return dedupe(v
.vec
, v
.nvec
);
567 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
568 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
569 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
572 /* aliases *******************************************************************/
574 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
575 * there is no alias sets *aliasp to 0. */
576 static int compute_alias(char **aliasp
,
581 const char *s
= config
->alias
, *t
, *expansion
, *part
;
582 int c
, used_db
= 0, slash_prefix
, err
;
584 const char *const root
= find_track_root(track
);
587 /* Bodge for tracks with no root */
592 dynstr_append_string(&d
, root
);
593 while((c
= (unsigned char)*s
++)) {
595 dynstr_append(&d
, c
);
598 if((slash_prefix
= (*s
== '/')))
601 assert(t
!= 0); /* validated at startup */
602 part
= xstrndup(s
, t
- s
);
603 expansion
= getpart(track
, "display", part
, p
, &used_db
);
605 if(slash_prefix
) dynstr_append(&d
, '/');
606 dynstr_append_string(&d
, expansion
);
608 s
= t
+ 1; /* skip {part} */
610 /* only admit to the alias if we used the db... */
615 dynstr_terminate(&d
);
616 /* ...and the answer differs from the original... */
617 if(!strcmp(track
, d
.vec
)) {
621 /* ...and there isn't already a different track with that name (including as
623 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
625 if((s
= kvp_get(at
, "_alias_for"))
626 && !strcmp(s
, track
)) {
638 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
639 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
640 * Always sets the return values, even if only to null pointers. */
641 static int gettrackdata(const char *track
,
644 const char **actualp
,
646 #define GTD_NOALIAS 0x0001
649 const char *actual
= track
;
650 struct kvp
*t
= 0, *p
= 0;
652 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
653 if((actual
= kvp_get(t
, "_alias_for"))) {
654 if(flags
& GTD_NOALIAS
) {
655 error(0, "alias passed to gettrackdata where real path required");
658 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
663 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
668 if(actualp
) *actualp
= actual
;
674 /* trackdb_notice() **********************************************************/
677 int trackdb_notice(const char *track
,
683 tid
= trackdb_begin_transaction();
684 err
= trackdb_notice_tid(track
, path
, tid
);
685 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
688 trackdb_abort_transaction(tid
);
690 trackdb_commit_transaction(tid
);
694 int trackdb_notice_tid(const char *track
,
698 struct kvp
*t
, *a
, *p
;
702 /* notice whether the tracks.db entry changes */
704 /* get any existing tracks entry */
705 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
708 /* this is a real track */
709 t_changed
+= kvp_set(&t
, "_alias_for", 0);
710 t_changed
+= kvp_set(&t
, "_path", path
);
711 /* if we have an alias record it in the database */
712 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
714 /* won't overwrite someone else's alias as compute_alias() checks */
715 D(("%s: alias %s", track
, alias
));
717 kvp_set(&a
, "_alias_for", track
);
718 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
720 /* update search.db */
721 w
= track_to_words(track
, p
);
722 for(n
= 0; w
[n
]; ++n
)
723 if((err
= register_search_word(track
, w
[n
], tid
)))
726 w
= parsetags(kvp_get(p
, "tags"));
727 for(n
= 0; w
[n
]; ++n
)
728 if((err
= register_tag(track
, w
[n
], tid
)))
731 /* only store the tracks.db entry if it has changed */
732 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
737 /* trackdb_obsolete() ********************************************************/
739 /* obsolete a track */
740 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
745 if((err
= gettrackdata(track
, 0, &p
, 0,
746 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
748 else if(err
== DB_NOTFOUND
) return 0;
749 /* compute the alias, if any, and delete it */
750 if(compute_alias(&alias
, track
, p
, tid
)) return err
;
752 /* if the alias points to some other track then compute_alias won't
754 if(trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
757 /* update search.db */
758 w
= track_to_words(track
, p
);
759 for(n
= 0; w
[n
]; ++n
)
760 if(trackdb_delkeydata(trackdb_searchdb
,
761 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
764 w
= parsetags(kvp_get(p
, "tags"));
765 for(n
= 0; w
[n
]; ++n
)
766 if(trackdb_delkeydata(trackdb_tagsdb
,
767 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
770 /* update tracks.db */
771 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
773 /* We don't delete the prefs, so they survive temporary outages of the
774 * (possibly virtual) track filesystem */
778 /* trackdb_stats() ***********************************************************/
780 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
781 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
783 static const struct statinfo
{
786 } statinfo_hash
[] = {
802 }, statinfo_btree
[] = {
823 /* look up stats for DB */
824 static int get_stats(struct vector
*v
,
826 const struct statinfo
*si
,
835 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
838 case DB_LOCK_DEADLOCK
:
839 error(0, "error querying database: %s", db_strerror(err
));
842 fatal(0, "error querying database: %s", db_strerror(err
));
844 for(n
= 0; n
< nsi
; ++n
) {
845 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
846 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
847 vector_append(v
, str
);
853 struct search_entry
{
858 /* find the top COUNT words in the search database */
859 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
860 struct search_entry
*se
;
863 int err
, n
= 0, nse
= 0, i
;
868 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
869 se
= xmalloc(count
* sizeof *se
);
870 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
872 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
875 #define FINALIZE() do { \
876 if(word && (nse < count || n > se[nse - 1].n)) { \
881 while(i > 0 && n > se[i - 1].n) \
883 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
889 word
= xstrndup(k
.data
, wl
= k
.size
);
897 case DB_LOCK_DEADLOCK
:
898 error(0, "error querying search database: %s", db_strerror(err
));
901 fatal(0, "error querying search database: %s", db_strerror(err
));
903 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
906 byte_xasprintf(&str
, "Top %d search words:", nse
);
907 vector_append(v
, str
);
908 for(i
= 0; i
< nse
; ++i
) {
909 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
910 vector_append(v
, str
);
915 #define SI(what) statinfo_##what, \
916 sizeof statinfo_##what / sizeof (struct statinfo)
918 /* return a list of database stats */
919 char **trackdb_stats(int *nstatsp
) {
926 tid
= trackdb_begin_transaction();
928 vector_append(&v
, (char *)"Tracks database stats:");
929 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
930 vector_append(&v
, (char *)"");
931 vector_append(&v
, (char *)"Search database stats:");
932 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
933 vector_append(&v
, (char *)"");
934 vector_append(&v
, (char *)"Prefs database stats:");
935 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
936 vector_append(&v
, (char *)"");
937 if(search_league(&v
, 10, tid
)) goto fail
;
938 vector_append(&v
, (char *)"");
939 vector_append(&v
, (char *)"Server stats:");
940 byte_xasprintf(&s
, "track lookup cache hits: %lu", cache_files_hits
);
941 vector_append(&v
, (char *)s
);
942 byte_xasprintf(&s
, "track lookup cache misses: %lu", cache_files_misses
);
943 vector_append(&v
, (char *)s
);
944 vector_terminate(&v
);
947 trackdb_abort_transaction(tid
);
949 trackdb_commit_transaction(tid
);
950 if(nstatsp
) *nstatsp
= v
.nvec
;
954 /* set a pref (remove if value=0) */
955 int trackdb_set(const char *track
,
958 struct kvp
*t
, *p
, *a
;
961 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
964 tid
= trackdb_begin_transaction();
965 if((err
= gettrackdata(track
, &t
, &p
, 0,
966 0, tid
)) == DB_LOCK_DEADLOCK
)
968 if(err
== DB_NOTFOUND
) break;
970 if(kvp_set(&t
, name
, value
))
971 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
974 /* get the old alias name */
975 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
976 /* get the old tags */
977 if(!strcmp(name
, "tags"))
978 oldtags
= parsetags(kvp_get(p
, "tags"));
980 if(kvp_set(&p
, name
, value
))
981 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
983 /* compute the new alias name */
984 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
985 /* check whether alias has changed */
986 if(!(oldalias
== newalias
987 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
988 /* adjust alias records to fit change */
990 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
)) goto fail
;
993 kvp_set(&a
, "_alias_for", track
);
994 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
997 /* check whether tags have changed */
998 if(!strcmp(name
, "tags")) {
999 newtags
= parsetags(value
);
1000 while(*oldtags
|| *newtags
) {
1001 if(*oldtags
&& *newtags
) {
1002 cmp
= strcmp(*oldtags
, *newtags
);
1004 /* keeping this tag */
1008 /* old tag fits into a gap in the new list, so delete old */
1011 /* new tag fits into a gap in the old list, so insert new */
1013 } else if(*oldtags
) {
1014 /* we've run out of new tags, so remaining old ones are to be
1017 if(trackdb_delkeydata(trackdb_tagsdb
,
1018 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1022 /* we've run out of old tags, so remainig new ones are to be
1025 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1035 trackdb_abort_transaction(tid
);
1037 trackdb_commit_transaction(tid
);
1038 return err
== 0 ?
0 : -1;
1042 const char *trackdb_get(const char *track
,
1044 return kvp_get(trackdb_get_all(track
), name
);
1047 /* get all prefs as a 0-terminated array */
1048 struct kvp
*trackdb_get_all(const char *track
) {
1049 struct kvp
*t
, *p
, **pp
;
1053 tid
= trackdb_begin_transaction();
1054 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1058 trackdb_abort_transaction(tid
);
1060 trackdb_commit_transaction(tid
);
1061 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1068 const char *trackdb_resolve(const char *track
) {
1073 tid
= trackdb_begin_transaction();
1074 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1078 trackdb_abort_transaction(tid
);
1080 trackdb_commit_transaction(tid
);
1084 int trackdb_isalias(const char *track
) {
1085 const char *actual
= trackdb_resolve(track
);
1087 return strcmp(actual
, track
);
1090 /* test whether a track exists (perhaps an alias) */
1091 int trackdb_exists(const char *track
) {
1096 tid
= trackdb_begin_transaction();
1097 /* unusually, here we want the return value */
1098 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1102 trackdb_abort_transaction(tid
);
1104 trackdb_commit_transaction(tid
);
1108 /* return the list of tags */
1109 char **trackdb_alltags(void) {
1115 tid
= trackdb_begin_transaction();
1116 err
= trackdb_alltags_tid(tid
, &taglist
);
1118 trackdb_abort_transaction(tid
);
1120 trackdb_commit_transaction(tid
);
1124 static int trackdb_alltags_tid(DB_TXN
*tid
, char ***taglistp
) {
1131 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1132 memset(&k
, 0, sizeof k
);
1133 while(!(err
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1134 vector_append(&v
, xstrndup(k
.data
, k
.size
));
1138 case DB_LOCK_DEADLOCK
:
1141 fatal(0, "c->c_get: %s", db_strerror(err
));
1143 if((err
= trackdb_closecursor(c
))) return err
;
1144 vector_terminate(&v
);
1149 /* return 1 iff sorted tag lists A and B have at least one member in common */
1150 static int tag_intersection(char **a
, char **b
) {
1153 /* Same sort of logic as trackdb_set() above */
1155 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1156 else if(cmp
< 0) ++a
;
1162 /* Check whether a track is suitable for random play. Returns 0 if it is,
1163 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1165 static int check_suitable(const char *track
,
1167 char **required_tags
,
1168 char **prohibited_tags
) {
1172 const char *pick_at_random
, *played_time
;
1174 /* don't pick tracks that aren't in any surviving collection (for instance
1175 * you've edited the config but the rescan hasn't done its job yet) */
1176 if(!find_track_root(track
)) {
1177 info("found track not in any collection: %s", track
);
1180 /* don't pick aliases - only pick the canonical form */
1181 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1182 return DB_LOCK_DEADLOCK
;
1183 if(kvp_get(t
, "_alias_for"))
1185 /* check that random play is not suppressed for this track */
1186 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1187 && !strcmp(pick_at_random
, "0"))
1189 /* don't pick a track that's been played in the last 8 hours */
1190 if((played_time
= kvp_get(p
, "played_time"))) {
1191 last
= atoll(played_time
);
1193 if(now
< last
+ 8 * 3600) /* TODO configurable */
1196 track_tags
= parsetags(kvp_get(p
, "tags"));
1197 /* check that no prohibited tag is present for this track */
1198 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1200 /* check that at least one required tags is present for this track */
1201 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1206 /* attempt to pick a random non-alias track */
1207 const char *trackdb_random(int tries
) {
1212 const char *track
, *candidate
;
1215 char **required_tags
, **prohibited_tags
, **tp
;
1220 tid
= trackdb_begin_transaction();
1221 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1223 required_tags
= parsetags(tags
);
1224 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1226 prohibited_tags
= parsetags(tags
);
1228 if(*required_tags
) {
1229 /* Bung all the suitable tracks into a hash and convert to a list of keys
1230 * (to eliminate duplicates). We cache this list since it is possible
1231 * that it will be very large. */
1234 for(tp
= required_tags
; *tp
; ++tp
) {
1235 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1236 memset(&key
, 0, sizeof key
);
1238 key
.size
= strlen(*tp
);
1240 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1242 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1243 HASH_INSERT_OR_REPLACE
);
1245 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1251 case DB_LOCK_DEADLOCK
:
1254 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1256 trackdb_closecursor(c
);
1259 error(0, "required tag %s does not match any tracks", *tp
);
1261 nreqtracks
= hash_count(h
);
1262 reqtracks
= hash_keys(h
);
1264 while(nreqtracks
&& !track
&& tries
-- > 0) {
1265 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1266 candidate
= reqtracks
[r
];
1267 switch(check_suitable(candidate
, tid
,
1268 required_tags
, prohibited_tags
)) {
1274 case DB_LOCK_DEADLOCK
:
1279 /* No required tags. We pick random record numbers in the database
1281 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1284 case DB_LOCK_DEADLOCK
:
1285 error(0, "error querying tracks.db: %s", db_strerror(err
));
1288 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1291 error(0, "cannot pick tracks at random from an empty database");
1292 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1293 /* record numbers count from 1 upwards */
1294 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1295 memset(&key
, sizeof key
, 0);
1296 key
.flags
= DB_DBT_MALLOC
;
1297 key
.size
= sizeof r
;
1299 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1303 case DB_LOCK_DEADLOCK
:
1304 error(0, "error querying tracks.db: %s", db_strerror(err
));
1307 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1309 candidate
= xstrndup(key
.data
, key
.size
);
1310 switch(check_suitable(candidate
, tid
,
1311 required_tags
, prohibited_tags
)) {
1317 case DB_LOCK_DEADLOCK
:
1324 trackdb_closecursor(c
);
1326 trackdb_abort_transaction(tid
);
1328 trackdb_commit_transaction(tid
);
1330 error(0, "could not pick a random track");
1334 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1335 * from the prefs. */
1336 static const char *getpart(const char *track
,
1337 const char *context
,
1339 const struct kvp
*p
,
1344 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1345 if((result
= kvp_get(p
, pref
)))
1348 result
= trackname_part(track
, context
, part
);
1349 assert(result
!= 0);
1353 /* get a track name part, like trackname_part(), but taking the database into
1355 const char *trackdb_getpart(const char *track
,
1356 const char *context
,
1364 /* construct the full pref */
1365 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1367 tid
= trackdb_begin_transaction();
1368 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1372 trackdb_abort_transaction(tid
);
1374 trackdb_commit_transaction(tid
);
1375 return getpart(actual
, context
, part
, p
, &used_db
);
1378 /* get the raw path name for @track@ (might be an alias) */
1379 const char *trackdb_rawpath(const char *track
) {
1385 tid
= trackdb_begin_transaction();
1386 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1390 trackdb_abort_transaction(tid
);
1392 trackdb_commit_transaction(tid
);
1393 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1397 /* trackdb_list **************************************************************/
1399 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1400 * readable at some point */
1402 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1403 * If RE is a null pointer then it matches everything. */
1404 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1412 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1413 case PCRE_ERROR_NOMATCH
: return 0;
1416 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1423 static int do_list(struct vector
*v
, const char *dir
,
1424 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1430 size_t l
, last_dir_len
= 0;
1431 char *last_dir
= 0, *track
, *alias
;
1435 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1438 /* find the first key >= dir */
1439 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1440 /* keep going while we're dealing with <dir/anything> */
1443 && ((char *)k
.data
)[dl
] == '/'
1444 && !memcmp(k
.data
, dir
, dl
)) {
1445 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1447 /* we have <dir/component/anything>, so <dir/component> is a directory */
1448 l
= ptr
- (char *)k
.data
;
1449 if(what
& trackdb_directories
)
1451 && l
== last_dir_len
1452 && !memcmp(last_dir
, k
.data
, l
))) {
1453 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1454 if(track_matches(dl
, k
.data
, l
, re
))
1455 vector_append(v
, last_dir
);
1458 /* found a plain file */
1459 if((what
& trackdb_files
)) {
1460 track
= xstrndup(k
.data
, k
.size
);
1461 if((err
= trackdb_getdata(trackdb_prefsdb
,
1462 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1464 /* if this file has an alias in the same directory then we skip it */
1465 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1467 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1468 if(track_matches(dl
, k
.data
, k
.size
, re
))
1469 vector_append(v
, track
);
1472 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1480 case DB_LOCK_DEADLOCK
:
1481 error(0, "error querying database: %s", db_strerror(err
));
1484 fatal(0, "error querying database: %s", db_strerror(err
));
1487 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1491 /* return the directories or files below @dir@ */
1492 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1500 tid
= trackdb_begin_transaction();
1503 if(do_list(&v
, dir
, what
, re
, tid
))
1506 for(n
= 0; n
< config
->collection
.n
; ++n
)
1507 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1512 trackdb_abort_transaction(tid
);
1514 trackdb_commit_transaction(tid
);
1515 vector_terminate(&v
);
1521 /* If S is tag:something, return something. Else return 0. */
1522 static const char *checktag(const char *s
) {
1523 if(!strncmp(s
, "tag:", 4))
1529 /* return a list of tracks containing all of the words given. If you
1530 * ask for only stopwords you get no tracks. */
1531 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1532 const char **w
, *best
= 0, *tag
;
1533 char **twords
, **tags
;
1534 int i
, j
, n
, err
, what
;
1544 *ntracks
= 0; /* for early returns */
1545 /* casefold all the words */
1546 w
= xmalloc(nwordlist
* sizeof (char *));
1547 for(n
= 0; n
< nwordlist
; ++n
) {
1548 w
[n
] = casefold(wordlist
[n
]);
1549 if(checktag(w
[n
])) ++ntags
; /* count up tags */
1551 /* find the longest non-stopword */
1552 for(n
= 0; n
< nwordlist
; ++n
)
1553 if(!stopword(w
[n
]) && !checktag(w
[n
]))
1554 if(!best
|| strlen(w
[n
]) > strlen(best
))
1556 /* TODO: we should at least in principal be able to identify the word or tag
1557 * with the least matches in log time, and choose that as our primary search
1559 if(ntags
&& !best
) {
1560 /* Only tags are listed. We limit to the first and narrow down with the
1562 best
= checktag(w
[0]);
1563 db
= trackdb_tagsdb
;
1566 /* We can limit to some word. */
1567 db
= trackdb_searchdb
;
1570 /* Only stopwords */
1576 tid
= trackdb_begin_transaction();
1577 /* find all the tracks that have that word */
1582 cursor
= trackdb_opencursor(db
, tid
);
1583 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
1584 vector_append(&v
, xstrndup(d
.data
, d
.size
));
1591 case DB_LOCK_DEADLOCK
:
1592 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1595 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
1597 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1599 /* do a naive search over that (hopefuly fairly small) list of tracks */
1601 for(n
= 0; n
< v
.nvec
; ++n
) {
1602 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
1605 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
1608 twords
= track_to_words(v
.vec
[n
], p
);
1609 tags
= parsetags(kvp_get(p
, "tags"));
1610 for(i
= 0; i
< nwordlist
; ++i
) {
1611 if((tag
= checktag(w
[i
]))) {
1612 /* Track must have this tag */
1613 for(j
= 0; tags
[j
]; ++j
)
1614 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
1615 if(!tags
[j
]) break; /* tag not found */
1617 /* Track must contain this word */
1618 for(j
= 0; twords
[j
]; ++j
)
1619 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
1620 if(!twords
[j
]) break; /* word not found */
1623 if(i
>= nwordlist
) /* all words found */
1624 vector_append(&u
, v
.vec
[n
]);
1628 trackdb_closecursor(cursor
);
1630 trackdb_abort_transaction(tid
);
1631 info("retrying search");
1633 trackdb_commit_transaction(tid
);
1634 vector_terminate(&u
);
1640 /* trackdb_scan **************************************************************/
1642 int trackdb_scan(const char *root
,
1643 int (*callback
)(const char *track
,
1651 const size_t root_len
= root ?
strlen(root
) : 0;
1656 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1658 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
1661 memset(&k
, 0, sizeof k
);
1662 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
1667 || (k
.size
> root_len
1668 && !strncmp(k
.data
, root
, root_len
)
1669 && ((char *)k
.data
)[root_len
] == '/')) {
1670 data
= kvp_urldecode(d
.data
, d
.size
);
1671 if(kvp_get(data
, "_path")) {
1672 track
= xstrndup(k
.data
, k
.size
);
1673 /* Advance to the next track before the callback so that the callback
1674 * may safely delete the track */
1675 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1676 if((cberr
= callback(track
, data
, u
, tid
))) {
1681 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1685 trackdb_closecursor(cursor
);
1692 case DB_LOCK_DEADLOCK
:
1693 error(0, "c->c_get: %s", db_strerror(err
));
1696 fatal(0, "c->c_get: %s", db_strerror(err
));
1700 /* trackdb_rescan ************************************************************/
1702 /* called when the rescanner terminates */
1703 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
1706 const struct rusage
attribute((unused
)) *rusage
,
1707 void attribute((unused
)) *u
) {
1708 if(pid
== rescan_pid
) rescan_pid
= -1;
1710 error(0, "disorderd-rescan: %s", wstat(status
));
1712 D(("disorderd-rescan terminate: %s", wstat(status
)));
1713 /* Our cache of file lookups is out of date now */
1714 cache_clean(&cache_files_type
);
1718 void trackdb_rescan(ev_source
*ev
) {
1719 if(rescan_pid
!= -1) {
1720 error(0, "rescan already underway");
1723 rescan_pid
= subprogram(ev
, RESCAN
);
1724 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
1725 D(("started rescanner"));
1729 int trackdb_rescan_cancel(void) {
1730 if(rescan_pid
== -1) return 0;
1731 if(kill(rescan_pid
, SIGTERM
) < 0)
1732 fatal(errno
, "error killing rescanner");
1737 /* global prefs **************************************************************/
1739 void trackdb_set_global(const char *name
,
1747 memset(&k
, 0, sizeof k
);
1748 memset(&d
, 0, sizeof d
);
1749 k
.data
= (void *)name
;
1750 k
.size
= strlen(name
);
1752 d
.data
= (void *)value
;
1753 d
.size
= strlen(value
);
1756 tid
= trackdb_begin_transaction();
1758 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
1760 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
1761 if(!err
|| err
== DB_NOTFOUND
) break;
1762 if(err
!= DB_LOCK_DEADLOCK
)
1763 fatal(0, "error updating database: %s", db_strerror(err
));
1764 trackdb_abort_transaction(tid
);
1766 trackdb_commit_transaction(tid
);
1767 /* log important state changes */
1768 if(!strcmp(name
, "playing")) {
1769 state
= !value
|| !strcmp(value
, "yes");
1770 info("playing %s by %s",
1771 state ?
"enabled" : "disabled",
1773 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
1775 if(!strcmp(name
, "random-play")) {
1776 state
= !value
|| !strcmp(value
, "yes");
1777 info("random play %s by %s",
1778 state ?
"enabled" : "disabled",
1780 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
1782 if(!strcmp(name
, "required-tags"))
1786 const char *trackdb_get_global(const char *name
) {
1792 tid
= trackdb_begin_transaction();
1793 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
1795 trackdb_abort_transaction(tid
);
1797 trackdb_commit_transaction(tid
);
1801 static int trackdb_get_global_tid(const char *name
,
1807 memset(&k
, 0, sizeof k
);
1808 k
.data
= (void *)name
;
1809 k
.size
= strlen(name
);
1810 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
1811 prepare_data(&d
), 0)) {
1813 *rp
= xstrndup(d
.data
, d
.size
);
1818 case DB_LOCK_DEADLOCK
:
1821 fatal(0, "error updating database: %s", db_strerror(err
));
1825 /* tidying up ****************************************************************/
1827 void trackdb_gc(void) {
1831 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
1832 config
->checkpoint_kbyte
,
1833 config
->checkpoint_min
,
1835 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
1836 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
1837 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
1838 /* This makes catastrophic recovery impossible. However, the user can still
1839 * preserve the important data by using disorder-dump to snapshot their
1840 * prefs, and later to restore it. This is likely to have much small
1841 * long-term storage requirements than record the db logfiles. */
1849 indent-tabs-mode:nil