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
20 /** @file server/trackdb.c
21 * @brief Track database
23 * This file is getting in desparate need of splitting up...
32 #include <sys/socket.h>
39 #include <sys/resource.h>
41 #include <arpa/inet.h>
54 #include "configuration.h"
59 #include "trackname.h"
60 #include "trackdb-int.h"
69 #define RESCAN "disorder-rescan"
70 #define DEADLOCK "disorder-deadlock"
72 static const char *getpart(const char *track
,
77 static char **trackdb_new_tid(int *ntracksp
,
80 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
);
81 static char *normalize_tag(const char *s
, size_t ns
);
83 const struct cache_type cache_files_type
= { 86400 };
84 unsigned long cache_files_hits
, cache_files_misses
;
86 /** @brief Set by trackdb_open() */
87 int trackdb_existing_database
;
89 /* setup and teardown ********************************************************/
91 static const char *home
; /* home had better not change */
92 DB_ENV
*trackdb_env
; /* db environment */
94 /** @brief The tracks database
95 * - Keys are UTF-8(NFC(unicode(path name)))
96 * - Values are encoded key-value pairs
97 * - Data is reconstructable data about tracks that currently exist
101 /** @brief The preferences database
103 * - Keys are UTF-8(NFC(unicode(path name)))
104 * - Values are encoded key-value pairs
105 * - Data is user data about tracks (that might not exist any more)
106 * and cannot be reconstructed
110 /** @brief The search database
112 * - Keys are UTF-8(NFKC(casefold(search term)))
113 * - Values are UTF-8(NFC(unicode(path name)))
114 * - There can be more than one value per key
115 * - Presence of key,value means that path matches the search terms
116 * - Only tracks fond in @ref tracks_tracksdb are represented here
117 * - This database can be reconstructed, it contains no user data
119 DB
*trackdb_searchdb
;
121 /** @brief The tags database
123 * - Keys are UTF-8(NFKC(casefold(tag)))
124 * - Values are UTF-8(NFC(unicode(path name)))
125 * - There can be more than one value per key
126 * - Presence of key,value means that path matches the tag
127 * - This is always in sync with the tags preference
128 * - This database can be reconstructed, it contains no user data
130 DB
*trackdb_tagsdb
; /* the tags database */
132 /** @brief The global preferences database
133 * - Keys are UTF-8(NFC(preference))
134 * - Values are global preference values
135 * - Data is user data and cannot be reconstructed
137 DB
*trackdb_globaldb
; /* global preferences */
139 /** @brief The noticed database
140 * - Keys are 64-bit big-endian timestamps
141 * - Values are UTF-8(NFC(unicode(path name)))
142 * - There can be more than one value per key
143 * - Presence of key,value means that path was added at the given time
144 * - Data cannot be reconstructed (but isn't THAT important)
146 DB
*trackdb_noticeddb
; /* when track noticed */
148 /** @brief The user database
149 * - Keys are usernames
150 * - Values are encoded key-value pairs
151 * - Data is user data and cannot be reconstructed
155 static pid_t db_deadlock_pid
= -1; /* deadlock manager PID */
156 static pid_t rescan_pid
= -1; /* rescanner PID */
157 static int initialized
, opened
; /* state */
159 /* tracks matched by required_tags */
160 static char **reqtracks
;
161 static size_t nreqtracks
;
163 /* comparison function for keys */
164 static int compare(DB
attribute((unused
)) *db_
,
165 const DBT
*a
, const DBT
*b
) {
166 return compare_path_raw(a
->data
, a
->size
, b
->data
, b
->size
);
169 /** @brief Open database environment
170 * @param flags Flags word
172 * Flags should be one of:
173 * - @ref TRACKDB_NO_RECOVER
174 * - @ref TRACKDB_NORMAL_RECOVER
175 * - @ref TRACKDB_FATAL_RECOVER
176 * - @ref TRACKDB_MAY_CREATE
178 void trackdb_init(int flags
) {
180 const int recover
= flags
& TRACKDB_RECOVER_MASK
;
181 static int recover_type
[] = { 0, DB_RECOVER
, DB_RECOVER_FATAL
};
184 assert(initialized
== 0);
187 if(strcmp(home
, config
->home
))
188 fatal(0, "cannot change db home without server restart");
192 if(flags
& TRACKDB_MAY_CREATE
) {
198 /* Remove world/group permissions on any regular files already in the
199 * database directory. Actually we don't care about all of them but it's
200 * easier to just do the lot. This can be revisited if it's a serious
201 * practical inconvenience for anyone.
203 * The socket, not being a regular file, is excepted.
205 if(!(dp
= opendir(config
->home
)))
206 fatal(errno
, "error reading %s", config
->home
);
207 while((de
= readdir(dp
))) {
208 byte_xasprintf(&p
, "%s/%s", config
->home
, de
->d_name
);
209 if(lstat(p
, &st
) == 0
210 && S_ISREG(st
.st_mode
)
211 && (st
.st_mode
& 077)) {
212 if(chmod(p
, st
.st_mode
& 07700) < 0)
213 fatal(errno
, "cannot chmod %s", p
);
220 /* create environment */
221 if((err
= db_env_create(&trackdb_env
, 0))) fatal(0, "db_env_create: %s",
223 if((err
= trackdb_env
->set_alloc(trackdb_env
,
224 xmalloc_noptr
, xrealloc_noptr
, xfree
)))
225 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err
));
226 if((err
= trackdb_env
->set_lk_max_locks(trackdb_env
, 10000)))
227 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err
));
228 if((err
= trackdb_env
->set_lk_max_objects(trackdb_env
, 10000)))
229 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err
));
230 if((err
= trackdb_env
->open(trackdb_env
, config
->home
,
236 |recover_type
[recover
],
238 fatal(0, "trackdb_env->open %s: %s", config
->home
, db_strerror(err
));
239 trackdb_env
->set_errpfx(trackdb_env
, "DB");
240 trackdb_env
->set_errfile(trackdb_env
, stderr
);
241 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_DEADLOCK
, 1);
242 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_RECOVERY
, 1);
243 trackdb_env
->set_verbose(trackdb_env
, DB_VERB_REPLICATION
, 1);
244 D(("initialized database environment"));
247 /* called when deadlock manager terminates */
248 static int reap_db_deadlock(ev_source
attribute((unused
)) *ev
,
249 pid_t
attribute((unused
)) pid
,
251 const struct rusage
attribute((unused
)) *rusage
,
252 void attribute((unused
)) *u
) {
253 db_deadlock_pid
= -1;
255 fatal(0, "deadlock manager unexpectedly terminated: %s",
258 D(("deadlock manager terminated: %s", wstat(status
)));
262 static pid_t
subprogram(ev_source
*ev
, const char *prog
,
266 /* If we're in the background then trap subprocess stdout/stderr */
267 if(!(pid
= xfork())) {
270 ev_signal_atfork(ev
);
271 signal(SIGPIPE
, SIG_DFL
);
276 /* ensure we don't leak privilege anywhere */
277 if(setuid(geteuid()) < 0)
278 fatal(errno
, "error calling setuid");
279 /* If we were negatively niced, undo it. We don't bother checking for
280 * error, it's not that important. */
281 setpriority(PRIO_PROCESS
, 0, 0);
282 execlp(prog
, prog
, "--config", configfile
,
283 debugging ?
"--debug" : "--no-debug",
284 log_default
== &log_syslog ?
"--syslog" : "--no-syslog",
286 fatal(errno
, "error invoking %s", prog
);
291 /* start deadlock manager */
292 void trackdb_master(ev_source
*ev
) {
293 assert(db_deadlock_pid
== -1);
294 db_deadlock_pid
= subprogram(ev
, DEADLOCK
, -1);
295 ev_child(ev
, db_deadlock_pid
, 0, reap_db_deadlock
, 0);
296 D(("started deadlock manager"));
299 /* close environment */
300 void trackdb_deinit(void) {
304 assert(initialized
== 1);
307 /* close the environment */
308 if((err
= trackdb_env
->close(trackdb_env
, 0)))
309 fatal(0, "trackdb_env->close: %s", db_strerror(err
));
311 if(rescan_pid
!= -1 && kill(rescan_pid
, SIGTERM
) < 0)
312 fatal(errno
, "error killing rescanner");
314 /* terminate the deadlock manager */
315 if(db_deadlock_pid
!= -1 && kill(db_deadlock_pid
, SIGTERM
) < 0)
316 fatal(errno
, "error killing deadlock manager");
317 db_deadlock_pid
= -1;
319 D(("deinitialized database environment"));
322 /* open a specific database */
323 static DB
*open_db(const char *path
,
331 D(("open %s", path
));
332 path
= config_get_file(path
);
333 if((err
= db_create(&db
, trackdb_env
, 0)))
334 fatal(0, "db_create %s: %s", path
, db_strerror(err
));
336 if((err
= db
->set_flags(db
, dbflags
)))
337 fatal(0, "db->set_flags %s: %s", path
, db_strerror(err
));
338 if(dbtype
== DB_BTREE
)
339 if((err
= db
->set_bt_compare(db
, compare
)))
340 fatal(0, "db->set_bt_compare %s: %s", path
, db_strerror(err
));
341 if((err
= db
->open(db
, 0, path
, 0, dbtype
,
342 openflags
| DB_AUTO_COMMIT
, mode
))) {
343 if((openflags
& DB_CREATE
) || errno
!= ENOENT
)
344 fatal(0, "db->open %s: %s", path
, db_strerror(err
));
351 /** @brief Open track databases
352 * @param Flags flags word
354 * @p flags should have one of:
355 * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted
356 * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted
357 * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade
359 * - @p TRACKDB_READ_ONLY, read only access
361 void trackdb_open(int flags
) {
364 uint32_t dbflags
= flags
& TRACKDB_READ_ONLY ? DB_RDONLY
: DB_CREATE
;
369 /* check the database version first */
370 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, DB_RDONLY
, 0666);
371 if(trackdb_globaldb
) {
372 /* This is an existing database */
376 s
= trackdb_get_global("_dbversion");
377 /* Close the database again, we'll open it property below */
378 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
379 fatal(0, "error closing global.db: %s", db_strerror(err
));
380 trackdb_globaldb
= 0;
381 /* Convert version string to an integer */
382 oldversion
= s ?
atol(s
) : 1;
383 if(oldversion
> config
->dbversion
) {
384 /* Database is from the future; we never allow this. */
385 fatal(0, "this version of DisOrder is too old for database version %ld",
388 if(oldversion
< config
->dbversion
) {
389 /* Database version is out of date */
390 switch(flags
& TRACKDB_UPGRADE_MASK
) {
391 case TRACKDB_NO_UPGRADE
:
392 /* This database needs upgrading but this is not permitted */
393 fatal(0, "database needs upgrading from %ld to %ld",
394 oldversion
, config
->dbversion
);
395 case TRACKDB_CAN_UPGRADE
:
396 /* This database needs upgrading */
397 info("invoking disorder-dbupgrade to upgrade from %ld to %ld",
398 oldversion
, config
->dbversion
);
399 pid
= subprogram(0, "disorder-dbupgrade", -1);
400 while(waitpid(pid
, &err
, 0) == -1 && errno
== EINTR
)
403 fatal(0, "disorder-dbupgrade %s", wstat(err
));
404 info("disorder-dbupgrade succeeded");
406 case TRACKDB_OPEN_FOR_UPGRADE
:
412 if(oldversion
== config
->dbversion
&& (flags
& TRACKDB_OPEN_FOR_UPGRADE
)) {
413 /* This doesn't make any sense */
414 fatal(0, "database is already at current version");
416 trackdb_existing_database
= 1;
418 if(flags
& TRACKDB_OPEN_FOR_UPGRADE
) {
419 /* Cannot upgrade a new database */
420 fatal(0, "cannot upgrade a database that does not exist");
422 /* This is a brand new database */
423 trackdb_existing_database
= 0;
425 /* open the databases */
426 trackdb_tracksdb
= open_db("tracks.db",
427 DB_RECNUM
, DB_BTREE
, dbflags
, 0666);
428 trackdb_searchdb
= open_db("search.db",
429 DB_DUP
|DB_DUPSORT
, DB_HASH
, dbflags
, 0666);
430 trackdb_tagsdb
= open_db("tags.db",
431 DB_DUP
|DB_DUPSORT
, DB_HASH
, dbflags
, 0666);
432 trackdb_prefsdb
= open_db("prefs.db", 0, DB_HASH
, dbflags
, 0666);
433 trackdb_globaldb
= open_db("global.db", 0, DB_HASH
, dbflags
, 0666);
434 trackdb_noticeddb
= open_db("noticed.db",
435 DB_DUPSORT
, DB_BTREE
, dbflags
, 0666);
436 trackdb_usersdb
= open_db("users.db",
437 0, DB_HASH
, dbflags
, 0600);
438 if(!trackdb_existing_database
) {
439 /* Stash the database version */
442 assert(!(flags
& TRACKDB_OPEN_FOR_UPGRADE
));
443 snprintf(buf
, sizeof buf
, "%ld", config
->dbversion
);
444 trackdb_set_global("_dbversion", buf
, 0);
446 D(("opened databases"));
449 /* close track databases */
450 void trackdb_close(void) {
456 if((err
= trackdb_tracksdb
->close(trackdb_tracksdb
, 0)))
457 fatal(0, "error closing tracks.db: %s", db_strerror(err
));
458 if((err
= trackdb_searchdb
->close(trackdb_searchdb
, 0)))
459 fatal(0, "error closing search.db: %s", db_strerror(err
));
460 if((err
= trackdb_tagsdb
->close(trackdb_tagsdb
, 0)))
461 fatal(0, "error closing tags.db: %s", db_strerror(err
));
462 if((err
= trackdb_prefsdb
->close(trackdb_prefsdb
, 0)))
463 fatal(0, "error closing prefs.db: %s", db_strerror(err
));
464 if((err
= trackdb_globaldb
->close(trackdb_globaldb
, 0)))
465 fatal(0, "error closing global.db: %s", db_strerror(err
));
466 if((err
= trackdb_noticeddb
->close(trackdb_noticeddb
, 0)))
467 fatal(0, "error closing noticed.db: %s", db_strerror(err
));
468 if((err
= trackdb_usersdb
->close(trackdb_usersdb
, 0)))
469 fatal(0, "error closing users.db: %s", db_strerror(err
));
470 trackdb_tracksdb
= trackdb_searchdb
= trackdb_prefsdb
= 0;
471 trackdb_tagsdb
= trackdb_globaldb
= 0;
472 D(("closed databases"));
475 /* generic db routines *******************************************************/
477 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
478 * DB_LOCK_DEADLOCK. */
479 int trackdb_getdata(DB
*db
,
486 switch(err
= db
->get(db
, tid
, make_key(&key
, track
),
487 prepare_data(&data
), 0)) {
489 *kp
= kvp_urldecode(data
.data
, data
.size
);
494 case DB_LOCK_DEADLOCK
:
495 error(0, "error querying database: %s", db_strerror(err
));
498 fatal(0, "error querying database: %s", db_strerror(err
));
502 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
503 * DB_LOCK_DEADLOCK. */
504 int trackdb_putdata(DB
*db
,
512 switch(err
= db
->put(db
, tid
, make_key(&key
, track
),
513 encode_data(&data
, k
), flags
)) {
517 case DB_LOCK_DEADLOCK
:
518 error(0, "error updating database: %s", db_strerror(err
));
521 fatal(0, "error updating database: %s", db_strerror(err
));
525 /** @brief Delete a database entry
527 * @param track Key to delete
528 * @param tid Transaction ID
529 * @return 0, DB_NOTFOUND or DB_LOCK_DEADLOCK
531 int trackdb_delkey(DB
*db
,
537 switch(err
= db
->del(db
, tid
, make_key(&key
, track
), 0)) {
541 case DB_LOCK_DEADLOCK
:
542 error(0, "error updating database: %s", db_strerror(err
));
545 fatal(0, "error updating database: %s", db_strerror(err
));
549 /* open a database cursor */
550 DBC
*trackdb_opencursor(DB
*db
, DB_TXN
*tid
) {
554 switch(err
= db
->cursor(db
, tid
, &c
, 0)) {
556 default: fatal(0, "error creating cursor: %s", db_strerror(err
));
561 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
562 int trackdb_closecursor(DBC
*c
) {
566 switch(err
= c
->c_close(c
)) {
569 case DB_LOCK_DEADLOCK
:
570 error(0, "error closing cursor: %s", db_strerror(err
));
573 fatal(0, "error closing cursor: %s", db_strerror(err
));
577 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
578 int trackdb_delkeydata(DB
*db
,
586 c
= trackdb_opencursor(db
, tid
);
587 switch(err
= c
->c_get(c
, make_key(&key
, word
),
588 make_key(&data
, track
), DB_GET_BOTH
)) {
590 switch(err
= c
->c_del(c
, 0)) {
596 case DB_LOCK_DEADLOCK
:
597 error(0, "error updating database: %s", db_strerror(err
));
600 fatal(0, "c->c_del: %s", db_strerror(err
));
605 case DB_LOCK_DEADLOCK
:
606 error(0, "error updating database: %s", db_strerror(err
));
609 fatal(0, "c->c_get: %s", db_strerror(err
));
611 if(trackdb_closecursor(c
)) err
= DB_LOCK_DEADLOCK
;
615 /* start a transaction */
616 DB_TXN
*trackdb_begin_transaction(void) {
620 if((err
= trackdb_env
->txn_begin(trackdb_env
, 0, &tid
, 0)))
621 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err
));
625 /* abort transaction */
626 void trackdb_abort_transaction(DB_TXN
*tid
) {
630 if((err
= tid
->abort(tid
)))
631 fatal(0, "tid->abort: %s", db_strerror(err
));
634 /* commit transaction */
635 void trackdb_commit_transaction(DB_TXN
*tid
) {
638 if((err
= tid
->commit(tid
, 0)))
639 fatal(0, "tid->commit: %s", db_strerror(err
));
642 /* search/tags shared code ***************************************************/
644 /* comparison function used by dedupe() */
645 static int wordcmp(const void *a
, const void *b
) {
646 return strcmp(*(const char **)a
, *(const char **)b
);
649 /* sort and de-dupe VEC */
650 static char **dedupe(char **vec
, int nvec
) {
653 qsort(vec
, nvec
, sizeof (char *), wordcmp
);
657 for(n
= 1; n
< nvec
; ++n
)
658 if(strcmp(vec
[n
], vec
[m
- 1]))
665 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
666 static int register_word(DB
*db
, const char *what
,
667 const char *track
, const char *word
,
672 switch(err
= db
->put(db
, tid
, make_key(&key
, word
),
673 make_key(&data
, track
), DB_NODUPDATA
)) {
677 case DB_LOCK_DEADLOCK
:
678 error(0, "error updating %s.db: %s", what
, db_strerror(err
));
681 fatal(0, "error updating %s.db: %s", what
, db_strerror(err
));
685 /* search primitives *********************************************************/
687 /* return true iff NAME is a trackname_display_ pref */
688 static int is_display_pref(const char *name
) {
689 static const char prefix
[] = "trackname_display_";
690 return !strncmp(name
, prefix
, (sizeof prefix
) - 1);
693 /** @brief Word_Break property tailor that treats underscores as spaces */
694 static int tailor_underscore_Word_Break_Other(uint32_t c
) {
698 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
699 return unicode_Word_Break_Other
;
703 /** @brief Remove all combining characters in-place
704 * @param s Pointer to start of string
705 * @param ns Length of string
706 * @return New, possiblby reduced, length
708 static size_t remove_combining_chars(uint32_t *s
, size_t ns
) {
709 uint32_t *start
= s
, *t
= s
, *end
= s
+ ns
;
712 const uint32_t c
= *s
++;
713 if(!utf32_combining_class(c
))
719 /** @brief Normalize and split a string using a given tailoring */
720 static void word_split(struct vector
*v
,
722 unicode_property_tailor
*pt
) {
724 uint32_t *t32
, **w32
;
726 /* Convert to UTF-32 */
727 if(!(t32
= utf8_to_utf32(s
, strlen(s
), &nt32
)))
729 /* Erase case distinctions */
730 if(!(t32
= utf32_casefold_compat(t32
, nt32
, &nt32
)))
732 /* Drop combining characters */
733 nt32
= remove_combining_chars(t32
, nt32
);
734 /* Split into words, treating _ as a space */
735 w32
= utf32_word_split(t32
, nt32
, &nw
, pt
);
736 /* Convert words back to UTF-8 and append to result */
737 for(i
= 0; i
< nw
; ++i
)
738 vector_append(v
, utf32_to_utf8(w32
[i
], utf32_len(w32
[i
]), 0));
741 /** @brief Normalize a tag
743 * @param ns Length of tag
744 * @return Normalized string or NULL on error
746 * The return value will be:
748 * - have no leading or trailing space
749 * - have no combining characters
750 * - all spacing between words will be a single U+0020 SPACE
752 static char *normalize_tag(const char *s
, size_t ns
) {
753 uint32_t *s32
, **w32
;
754 size_t ns32
, nw32
, i
;
757 if(!(s32
= utf8_to_utf32(s
, ns
, &ns32
)))
759 if(!(s32
= utf32_casefold_compat(s32
, ns32
, &ns32
))) /* ->NFKD */
761 ns32
= remove_combining_chars(s32
, ns32
);
762 /* Split into words, no Word_Break tailoring */
763 w32
= utf32_word_split(s32
, ns32
, &nw32
, 0);
764 /* Compose back into a string */
766 for(i
= 0; i
< nw32
; ++i
) {
768 dynstr_append(d
, ' ');
769 dynstr_append_string(d
, utf32_to_utf8(w32
[i
], utf32_len(w32
[i
]), 0));
775 /* compute the words of a track name */
776 static char **track_to_words(const char *track
,
777 const struct kvp
*p
) {
779 const char *rootless
= track_rootless(track
);
782 rootless
= track
; /* bodge */
784 rootless
= strip_extension(rootless
);
785 word_split(&v
, strip_extension(rootless
), tailor_underscore_Word_Break_Other
);
786 for(; p
; p
= p
->next
)
787 if(is_display_pref(p
->name
))
788 word_split(&v
, p
->value
, 0);
789 vector_terminate(&v
);
790 return dedupe(v
.vec
, v
.nvec
);
793 /* return nonzero iff WORD is a stopword */
794 static int stopword(const char *word
) {
797 for(n
= 0; n
< config
->stopword
.n
798 && strcmp(word
, config
->stopword
.s
[n
]); ++n
)
800 return n
< config
->stopword
.n
;
803 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
804 static int register_search_word(const char *track
, const char *word
,
806 if(stopword(word
)) return 0;
807 return register_word(trackdb_searchdb
, "search", track
, word
, tid
);
810 /* Tags **********************************************************************/
812 /* Return nonzero if C is a valid tag character */
813 static int tagchar(int c
) {
822 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
823 static char **parsetags(const char *s
) {
829 /* skip initial separators */
830 while(*s
&& (!tagchar(*s
) || *s
== ' '))
833 /* find the extent of the tag */
835 while(*s
&& tagchar(*s
))
837 /* strip trailing spaces */
838 while(s
> t
&& s
[-1] == ' ')
840 /* add tag to list */
841 vector_append(&v
, normalize_tag(t
, (size_t)(s
- t
)));
842 /* skip intermediate and trailing separators */
843 while(*s
&& (!tagchar(*s
) || *s
== ' '))
847 vector_terminate(&v
);
848 return dedupe(v
.vec
, v
.nvec
);
851 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
852 static int register_tag(const char *track
, const char *tag
, DB_TXN
*tid
) {
853 return register_word(trackdb_tagsdb
, "tags", track
, tag
, tid
);
856 /* aliases *******************************************************************/
858 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
859 * there is no alias sets *aliasp to 0. */
860 static int compute_alias(char **aliasp
,
865 const char *s
= config
->alias
, *t
, *expansion
, *part
;
866 int c
, used_db
= 0, slash_prefix
, err
;
868 const char *const root
= find_track_root(track
);
871 /* Bodge for tracks with no root */
876 dynstr_append_string(&d
, root
);
877 while((c
= (unsigned char)*s
++)) {
879 dynstr_append(&d
, c
);
882 if((slash_prefix
= (*s
== '/')))
885 assert(t
!= 0); /* validated at startup */
886 part
= xstrndup(s
, t
- s
);
887 expansion
= getpart(track
, "display", part
, p
, &used_db
);
889 if(slash_prefix
) dynstr_append(&d
, '/');
890 dynstr_append_string(&d
, expansion
);
892 s
= t
+ 1; /* skip {part} */
894 /* only admit to the alias if we used the db... */
899 dynstr_terminate(&d
);
900 /* ...and the answer differs from the original... */
901 if(!strcmp(track
, d
.vec
)) {
905 /* ...and there isn't already a different track with that name (including as
907 switch(err
= trackdb_getdata(trackdb_tracksdb
, d
.vec
, &at
, tid
)) {
909 if((s
= kvp_get(at
, "_alias_for"))
910 && !strcmp(s
, track
)) {
922 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
923 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
924 * Always sets the return values, even if only to null pointers. */
925 static int gettrackdata(const char *track
,
928 const char **actualp
,
930 #define GTD_NOALIAS 0x0001
933 const char *actual
= track
;
934 struct kvp
*t
= 0, *p
= 0;
936 if((err
= trackdb_getdata(trackdb_tracksdb
, track
, &t
, tid
))) goto done
;
937 if((actual
= kvp_get(t
, "_alias_for"))) {
938 if(flags
& GTD_NOALIAS
) {
939 error(0, "alias passed to gettrackdata where real path required");
942 if((err
= trackdb_getdata(trackdb_tracksdb
, actual
, &t
, tid
))) goto done
;
947 if((err
= trackdb_getdata(trackdb_prefsdb
, actual
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
952 if(actualp
) *actualp
= actual
;
958 /* trackdb_notice() **********************************************************/
960 /** @brief notice a possibly new track
961 * @return @c DB_NOTFOUND if new, 0 if already known
963 int trackdb_notice(const char *track
,
969 tid
= trackdb_begin_transaction();
970 err
= trackdb_notice_tid(track
, path
, tid
);
971 if((err
== DB_LOCK_DEADLOCK
)) goto fail
;
974 trackdb_abort_transaction(tid
);
976 trackdb_commit_transaction(tid
);
980 /** @brief notice a possibly new track
981 * @param track NFC UTF-8 track name
982 * @param path Raw path name
983 * @param tid Transaction ID
984 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
986 int trackdb_notice_tid(const char *track
,
990 struct kvp
*t
, *a
, *p
;
994 /* notice whether the tracks.db entry changes */
996 /* get any existing tracks entry */
997 if((err
= gettrackdata(track
, &t
, &p
, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
999 ret
= err
; /* 0 or DB_NOTFOUND */
1000 /* this is a real track */
1001 t_changed
+= kvp_set(&t
, "_alias_for", 0);
1002 t_changed
+= kvp_set(&t
, "_path", path
);
1003 /* if we have an alias record it in the database */
1004 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
1006 /* won't overwrite someone else's alias as compute_alias() checks */
1007 D(("%s: alias %s", track
, alias
));
1009 kvp_set(&a
, "_alias_for", track
);
1010 if((err
= trackdb_putdata(trackdb_tracksdb
, alias
, a
, tid
, 0))) return err
;
1012 /* update search.db */
1013 w
= track_to_words(track
, p
);
1014 for(n
= 0; w
[n
]; ++n
)
1015 if((err
= register_search_word(track
, w
[n
], tid
)))
1017 /* update tags.db */
1018 w
= parsetags(kvp_get(p
, "tags"));
1019 for(n
= 0; w
[n
]; ++n
)
1020 if((err
= register_tag(track
, w
[n
], tid
)))
1023 /* only store the tracks.db entry if it has changed */
1024 if(t_changed
&& (err
= trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0)))
1026 if(ret
== DB_NOTFOUND
) {
1027 uint32_t timestamp
[2];
1032 timestamp
[0] = htonl((uint64_t)now
>> 32);
1033 timestamp
[1] = htonl((uint32_t)now
);
1034 memset(&key
, 0, sizeof key
);
1035 key
.data
= timestamp
;
1036 key
.size
= sizeof timestamp
;
1037 switch(err
= trackdb_noticeddb
->put(trackdb_noticeddb
, tid
, &key
,
1038 make_key(&data
, track
), 0)) {
1040 case DB_LOCK_DEADLOCK
: return err
;
1041 default: fatal(0, "error updating noticed.db: %s", db_strerror(err
));
1047 /* trackdb_obsolete() ********************************************************/
1049 /* obsolete a track */
1050 int trackdb_obsolete(const char *track
, DB_TXN
*tid
) {
1055 if((err
= gettrackdata(track
, 0, &p
, 0,
1056 GTD_NOALIAS
, tid
)) == DB_LOCK_DEADLOCK
)
1058 else if(err
== DB_NOTFOUND
) return 0;
1059 /* compute the alias, if any, and delete it */
1060 if((err
= compute_alias(&alias
, track
, p
, tid
))) return err
;
1062 /* if the alias points to some other track then compute_alias won't
1064 if((err
= trackdb_delkey(trackdb_tracksdb
, alias
, tid
))
1065 && err
!= DB_NOTFOUND
)
1068 /* update search.db */
1069 w
= track_to_words(track
, p
);
1070 for(n
= 0; w
[n
]; ++n
)
1071 if(trackdb_delkeydata(trackdb_searchdb
,
1072 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
1074 /* update tags.db */
1075 w
= parsetags(kvp_get(p
, "tags"));
1076 for(n
= 0; w
[n
]; ++n
)
1077 if(trackdb_delkeydata(trackdb_tagsdb
,
1078 w
[n
], track
, tid
) == DB_LOCK_DEADLOCK
)
1081 /* update tracks.db */
1082 if(trackdb_delkey(trackdb_tracksdb
, track
, tid
) == DB_LOCK_DEADLOCK
)
1084 /* We don't delete the prefs, so they survive temporary outages of the
1085 * (possibly virtual) track filesystem */
1089 /* trackdb_stats() ***********************************************************/
1091 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
1092 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
1094 static const struct statinfo
{
1097 } statinfo_hash
[] = {
1113 }, statinfo_btree
[] = {
1134 /* look up stats for DB */
1135 static int get_stats(struct vector
*v
,
1137 const struct statinfo
*si
,
1146 switch(err
= database
->stat(database
, tid
, &sp
, 0)) {
1149 case DB_LOCK_DEADLOCK
:
1150 error(0, "error querying database: %s", db_strerror(err
));
1153 fatal(0, "error querying database: %s", db_strerror(err
));
1155 for(n
= 0; n
< nsi
; ++n
) {
1156 byte_xasprintf(&str
, "%s=%"PRIuMAX
, si
[n
].name
,
1157 (uintmax_t)*(u_int32_t
*)((char *)sp
+ si
[n
].offset
));
1158 vector_append(v
, str
);
1164 /** @brief One entry in the search league */
1165 struct search_entry
{
1170 /** @brief Add a word to the search league
1171 * @param se Pointer to search league
1172 * @param count Maximum size for search league
1173 * @param nse Current size of search league
1174 * @param word New word, or NULL
1175 * @param n How often @p word appears
1176 * @return New size of search league
1178 static int register_search_entry(struct search_entry
*se
,
1185 if(word
&& (nse
< count
|| n
> se
[nse
- 1].n
)) {
1186 /* Find the starting point */
1191 /* Find the insertion point */
1192 while(i
> 0 && n
> se
[i
- 1].n
)
1194 memmove(&se
[i
+ 1], &se
[i
], (nse
- i
- 1) * sizeof *se
);
1201 /* find the top COUNT words in the search database */
1202 static int search_league(struct vector
*v
, int count
, DB_TXN
*tid
) {
1203 struct search_entry
*se
;
1206 int err
, n
= 0, nse
= 0, i
;
1211 cursor
= trackdb_opencursor(trackdb_searchdb
, tid
);
1212 se
= xmalloc(count
* sizeof *se
);
1213 /* Walk across the whole database counting up the number of times each
1215 while(!(err
= cursor
->c_get(cursor
, prepare_data(&k
), prepare_data(&d
),
1217 if(word
&& wl
== k
.size
&& !strncmp(word
, k
.data
, wl
))
1218 ++n
; /* same word again */
1220 nse
= register_search_entry(se
, count
, nse
, word
, n
);
1221 word
= xstrndup(k
.data
, wl
= k
.size
);
1229 case DB_LOCK_DEADLOCK
:
1230 error(0, "error querying search database: %s", db_strerror(err
));
1233 fatal(0, "error querying search database: %s", db_strerror(err
));
1235 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1237 nse
= register_search_entry(se
, count
, nse
, word
, n
);
1238 byte_xasprintf(&str
, "Top %d search words:", nse
);
1239 vector_append(v
, str
);
1240 for(i
= 0; i
< nse
; ++i
) {
1241 byte_xasprintf(&str
, "%4d: %5d %s", i
+ 1, se
[i
].n
, se
[i
].word
);
1242 vector_append(v
, str
);
1247 #define SI(what) statinfo_##what, \
1248 sizeof statinfo_##what / sizeof (struct statinfo)
1250 /* return a list of database stats */
1251 char **trackdb_stats(int *nstatsp
) {
1257 tid
= trackdb_begin_transaction();
1259 vector_append(&v
, (char *)"Tracks database stats:");
1260 if(get_stats(&v
, trackdb_tracksdb
, SI(btree
), tid
)) goto fail
;
1261 vector_append(&v
, (char *)"");
1262 vector_append(&v
, (char *)"Search database stats:");
1263 if(get_stats(&v
, trackdb_searchdb
, SI(hash
), tid
)) goto fail
;
1264 vector_append(&v
, (char *)"");
1265 vector_append(&v
, (char *)"Prefs database stats:");
1266 if(get_stats(&v
, trackdb_prefsdb
, SI(hash
), tid
)) goto fail
;
1267 vector_append(&v
, (char *)"");
1268 if(search_league(&v
, 10, tid
)) goto fail
;
1269 vector_terminate(&v
);
1272 trackdb_abort_transaction(tid
);
1274 trackdb_commit_transaction(tid
);
1275 if(nstatsp
) *nstatsp
= v
.nvec
;
1279 struct stats_details
{
1280 void (*done
)(char *data
, void *u
);
1282 int exited
; /* subprocess exited */
1283 int closed
; /* pipe close */
1284 int wstat
; /* wait status from subprocess */
1285 struct dynstr data
[1]; /* data read from pipe */
1288 static void stats_complete(struct stats_details
*d
) {
1291 if(!(d
->exited
&& d
->closed
))
1293 byte_xasprintf(&s
, "\n"
1295 "track lookup cache hits: %lu\n"
1296 "track lookup cache misses: %lu\n",
1298 cache_files_misses
);
1299 dynstr_append_string(d
->data
, s
);
1300 dynstr_terminate(d
->data
);
1301 d
->done(d
->data
->vec
, d
->u
);
1304 static int stats_finished(ev_source
attribute((unused
)) *ev
,
1305 pid_t
attribute((unused
)) pid
,
1307 const struct rusage
attribute((unused
)) *rusage
,
1309 struct stats_details
*const d
= u
;
1313 error(0, "disorder-stats %s", wstat(status
));
1318 static int stats_read(ev_source
attribute((unused
)) *ev
,
1324 struct stats_details
*const d
= u
;
1326 dynstr_append_bytes(d
->data
, ptr
, bytes
);
1327 ev_reader_consume(reader
, bytes
);
1334 static int stats_error(ev_source
attribute((unused
)) *ev
,
1337 struct stats_details
*const d
= u
;
1339 error(errno_value
, "error reading from pipe to disorder-stats");
1345 void trackdb_stats_subprocess(ev_source
*ev
,
1346 void (*done
)(char *data
, void *u
),
1350 struct stats_details
*d
= xmalloc(sizeof *d
);
1352 dynstr_init(d
->data
);
1356 pid
= subprogram(ev
, "disorder-stats", p
[1]);
1358 ev_child(ev
, pid
, 0, stats_finished
, d
);
1359 ev_reader_new(ev
, p
[0], stats_read
, stats_error
, d
, "disorder-stats reader");
1362 /* set a pref (remove if value=0) */
1363 int trackdb_set(const char *track
,
1365 const char *value
) {
1366 struct kvp
*t
, *p
, *a
;
1369 char *oldalias
, *newalias
, **oldtags
= 0, **newtags
;
1372 /* TODO: if value matches default then set value=0 */
1376 tid
= trackdb_begin_transaction();
1377 if((err
= gettrackdata(track
, &t
, &p
, 0,
1378 0, tid
)) == DB_LOCK_DEADLOCK
)
1380 if(err
== DB_NOTFOUND
) break;
1381 if(name
[0] == '_') {
1382 if(kvp_set(&t
, name
, value
))
1383 if(trackdb_putdata(trackdb_tracksdb
, track
, t
, tid
, 0))
1386 /* get the old alias name */
1387 if(compute_alias(&oldalias
, track
, p
, tid
)) goto fail
;
1388 /* get the old tags */
1389 if(!strcmp(name
, "tags"))
1390 oldtags
= parsetags(kvp_get(p
, "tags"));
1392 if(kvp_set(&p
, name
, value
))
1393 if(trackdb_putdata(trackdb_prefsdb
, track
, p
, tid
, 0))
1395 /* compute the new alias name */
1396 if((err
= compute_alias(&newalias
, track
, p
, tid
))) goto fail
;
1397 /* check whether alias has changed */
1398 if(!(oldalias
== newalias
1399 || (oldalias
&& newalias
&& !strcmp(oldalias
, newalias
)))) {
1400 /* adjust alias records to fit change */
1402 && trackdb_delkey(trackdb_tracksdb
, oldalias
, tid
) == DB_LOCK_DEADLOCK
)
1406 kvp_set(&a
, "_alias_for", track
);
1407 if(trackdb_putdata(trackdb_tracksdb
, newalias
, a
, tid
, 0)) goto fail
;
1410 /* check whether tags have changed */
1411 if(!strcmp(name
, "tags")) {
1412 newtags
= parsetags(value
);
1413 while(*oldtags
|| *newtags
) {
1414 if(*oldtags
&& *newtags
) {
1415 cmp
= strcmp(*oldtags
, *newtags
);
1417 /* keeping this tag */
1421 /* old tag fits into a gap in the new list, so delete old */
1424 /* new tag fits into a gap in the old list, so insert new */
1426 } else if(*oldtags
) {
1427 /* we've run out of new tags, so remaining old ones are to be
1430 if(trackdb_delkeydata(trackdb_tagsdb
,
1431 *oldtags
, track
, tid
) == DB_LOCK_DEADLOCK
)
1435 /* we've run out of old tags, so remainig new ones are to be
1438 if(register_tag(track
, *newtags
, tid
)) goto fail
;
1448 trackdb_abort_transaction(tid
);
1450 trackdb_commit_transaction(tid
);
1451 return err
== 0 ?
0 : -1;
1455 const char *trackdb_get(const char *track
,
1457 return kvp_get(trackdb_get_all(track
), name
);
1460 /* get all prefs as a 0-terminated array */
1461 struct kvp
*trackdb_get_all(const char *track
) {
1462 struct kvp
*t
, *p
, **pp
;
1466 tid
= trackdb_begin_transaction();
1467 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1471 trackdb_abort_transaction(tid
);
1473 trackdb_commit_transaction(tid
);
1474 for(pp
= &p
; *pp
; pp
= &(*pp
)->next
)
1481 const char *trackdb_resolve(const char *track
) {
1486 tid
= trackdb_begin_transaction();
1487 if(gettrackdata(track
, 0, 0, &actual
, 0, tid
) == DB_LOCK_DEADLOCK
)
1491 trackdb_abort_transaction(tid
);
1493 trackdb_commit_transaction(tid
);
1497 int trackdb_isalias(const char *track
) {
1498 const char *actual
= trackdb_resolve(track
);
1500 return strcmp(actual
, track
);
1503 /* test whether a track exists (perhaps an alias) */
1504 int trackdb_exists(const char *track
) {
1509 tid
= trackdb_begin_transaction();
1510 /* unusually, here we want the return value */
1511 if((err
= gettrackdata(track
, 0, 0, 0, 0, tid
)) == DB_LOCK_DEADLOCK
)
1515 trackdb_abort_transaction(tid
);
1517 trackdb_commit_transaction(tid
);
1521 /* return the list of tags */
1522 char **trackdb_alltags(void) {
1526 WITH_TRANSACTION(trackdb_listkeys(trackdb_tagsdb
, v
, tid
));
1530 /** @brief List all the keys in @p db
1531 * @param db Database
1532 * @param v Vector to store keys in
1533 * @param tid Transaction ID
1534 * @return 0 or DB_LOCK_DEADLOCK
1536 int trackdb_listkeys(DB
*db
, struct vector
*v
, DB_TXN
*tid
) {
1539 DBC
*const c
= trackdb_opencursor(db
, tid
);
1542 memset(&k
, 0, sizeof k
);
1543 while(!(e
= c
->c_get(c
, &k
, prepare_data(&d
), DB_NEXT_NODUP
)))
1544 vector_append(v
, xstrndup(k
.data
, k
.size
));
1548 case DB_LOCK_DEADLOCK
:
1551 fatal(0, "c->c_get: %s", db_strerror(e
));
1553 if((e
= trackdb_closecursor(c
)))
1555 vector_terminate(v
);
1559 /* return 1 iff sorted tag lists A and B have at least one member in common */
1560 static int tag_intersection(char **a
, char **b
) {
1563 /* Same sort of logic as trackdb_set() above */
1565 if(!(cmp
= strcmp(*a
, *b
))) return 1;
1566 else if(cmp
< 0) ++a
;
1572 /* Check whether a track is suitable for random play. Returns 0 if it is,
1573 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1575 static int check_suitable(const char *track
,
1577 char **required_tags
,
1578 char **prohibited_tags
) {
1582 const char *pick_at_random
, *played_time
;
1584 /* don't pick tracks that aren't in any surviving collection (for instance
1585 * you've edited the config but the rescan hasn't done its job yet) */
1586 if(!find_track_root(track
)) {
1587 info("found track not in any collection: %s", track
);
1590 /* don't pick aliases - only pick the canonical form */
1591 if(gettrackdata(track
, &t
, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1592 return DB_LOCK_DEADLOCK
;
1593 if(kvp_get(t
, "_alias_for"))
1595 /* check that random play is not suppressed for this track */
1596 if((pick_at_random
= kvp_get(p
, "pick_at_random"))
1597 && !strcmp(pick_at_random
, "0"))
1599 /* don't pick a track that's been played in the last 8 hours */
1600 if((played_time
= kvp_get(p
, "played_time"))) {
1601 last
= atoll(played_time
);
1603 if(now
< last
+ 8 * 3600) /* TODO configurable */
1606 track_tags
= parsetags(kvp_get(p
, "tags"));
1607 /* check that no prohibited tag is present for this track */
1608 if(prohibited_tags
&& tag_intersection(track_tags
, prohibited_tags
))
1610 /* check that at least one required tags is present for this track */
1611 if(*required_tags
&& !tag_intersection(track_tags
, required_tags
))
1616 /* attempt to pick a random non-alias track */
1617 const char *trackdb_random(int tries
) {
1622 const char *track
, *candidate
;
1625 char **required_tags
, **prohibited_tags
, **tp
;
1630 tid
= trackdb_begin_transaction();
1631 if((err
= trackdb_get_global_tid("required-tags", tid
, &tags
)))
1633 required_tags
= parsetags(tags
);
1634 if((err
= trackdb_get_global_tid("prohibited-tags", tid
, &tags
)))
1636 prohibited_tags
= parsetags(tags
);
1638 if(*required_tags
) {
1639 /* Bung all the suitable tracks into a hash and convert to a list of keys
1640 * (to eliminate duplicates). We cache this list since it is possible
1641 * that it will be very large. */
1644 for(tp
= required_tags
; *tp
; ++tp
) {
1645 c
= trackdb_opencursor(trackdb_tagsdb
, tid
);
1646 memset(&key
, 0, sizeof key
);
1648 key
.size
= strlen(*tp
);
1650 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_SET
);
1652 hash_add(h
, xstrndup(data
.data
, data
.size
), 0,
1653 HASH_INSERT_OR_REPLACE
);
1655 err
= c
->c_get(c
, &key
, prepare_data(&data
), DB_NEXT_DUP
);
1661 case DB_LOCK_DEADLOCK
:
1664 fatal(0, "error querying tags.db: %s", db_strerror(err
));
1666 trackdb_closecursor(c
);
1669 error(0, "required tag %s does not match any tracks", *tp
);
1671 nreqtracks
= hash_count(h
);
1672 reqtracks
= hash_keys(h
);
1674 while(nreqtracks
&& !track
&& tries
-- > 0) {
1675 r
= (rand() * (double)nreqtracks
/ (RAND_MAX
+ 1.0));
1676 candidate
= reqtracks
[r
];
1677 switch(check_suitable(candidate
, tid
,
1678 required_tags
, prohibited_tags
)) {
1684 case DB_LOCK_DEADLOCK
:
1689 /* No required tags. We pick random record numbers in the database
1691 switch(err
= trackdb_tracksdb
->stat(trackdb_tracksdb
, tid
, &sp
, 0)) {
1694 case DB_LOCK_DEADLOCK
:
1695 error(0, "error querying tracks.db: %s", db_strerror(err
));
1698 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1701 error(0, "cannot pick tracks at random from an empty database");
1702 while(sp
->bt_nkeys
&& !track
&& tries
-- > 0) {
1703 /* record numbers count from 1 upwards */
1704 r
= 1 + (rand() * (double)sp
->bt_nkeys
/ (RAND_MAX
+ 1.0));
1705 memset(&key
, sizeof key
, 0);
1706 key
.flags
= DB_DBT_MALLOC
;
1707 key
.size
= sizeof r
;
1709 switch(err
= trackdb_tracksdb
->get(trackdb_tracksdb
, tid
, &key
, prepare_data(&data
),
1713 case DB_LOCK_DEADLOCK
:
1714 error(0, "error querying tracks.db: %s", db_strerror(err
));
1717 fatal(0, "error querying tracks.db: %s", db_strerror(err
));
1719 candidate
= xstrndup(key
.data
, key
.size
);
1720 switch(check_suitable(candidate
, tid
,
1721 required_tags
, prohibited_tags
)) {
1727 case DB_LOCK_DEADLOCK
:
1734 trackdb_closecursor(c
);
1736 trackdb_abort_transaction(tid
);
1738 trackdb_commit_transaction(tid
);
1740 error(0, "could not pick a random track");
1744 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1745 * from the prefs. */
1746 static const char *getpart(const char *track
,
1747 const char *context
,
1749 const struct kvp
*p
,
1754 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1755 if((result
= kvp_get(p
, pref
)))
1758 result
= trackname_part(track
, context
, part
);
1759 assert(result
!= 0);
1763 /* get a track name part, like trackname_part(), but taking the database into
1765 const char *trackdb_getpart(const char *track
,
1766 const char *context
,
1774 /* construct the full pref */
1775 byte_xasprintf(&pref
, "trackname_%s_%s", context
, part
);
1777 tid
= trackdb_begin_transaction();
1778 if((err
= gettrackdata(track
, 0, &p
, &actual
, 0, tid
)) == DB_LOCK_DEADLOCK
)
1782 trackdb_abort_transaction(tid
);
1784 trackdb_commit_transaction(tid
);
1785 return getpart(actual
, context
, part
, p
, &used_db
);
1788 /* get the raw path name for @track@ (might be an alias) */
1789 const char *trackdb_rawpath(const char *track
) {
1795 tid
= trackdb_begin_transaction();
1796 if(gettrackdata(track
, &t
, 0, 0, 0, tid
) == DB_LOCK_DEADLOCK
)
1800 trackdb_abort_transaction(tid
);
1802 trackdb_commit_transaction(tid
);
1803 if(!(path
= kvp_get(t
, "_path"))) path
= track
;
1807 /* trackdb_list **************************************************************/
1809 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1810 * readable at some point */
1812 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1813 * If RE is a null pointer then it matches everything. */
1814 static int track_matches(size_t dl
, const char *track
, size_t tl
,
1822 switch(rc
= pcre_exec(re
, 0, track
, tl
, 0, 0, ovec
, 3)) {
1823 case PCRE_ERROR_NOMATCH
: return 0;
1826 error(0, "pcre_exec returned %d, subject '%s'", rc
, track
);
1833 static int do_list(struct vector
*v
, const char *dir
,
1834 enum trackdb_listable what
, const pcre
*re
, DB_TXN
*tid
) {
1840 size_t l
, last_dir_len
= 0;
1841 char *last_dir
= 0, *track
, *alias
;
1845 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
1848 /* find the first key >= dir */
1849 err
= cursor
->c_get(cursor
, &k
, &d
, DB_SET_RANGE
);
1850 /* keep going while we're dealing with <dir/anything> */
1853 && ((char *)k
.data
)[dl
] == '/'
1854 && !memcmp(k
.data
, dir
, dl
)) {
1855 ptr
= memchr((char *)k
.data
+ dl
+ 1, '/', k
.size
- (dl
+ 1));
1857 /* we have <dir/component/anything>, so <dir/component> is a directory */
1858 l
= ptr
- (char *)k
.data
;
1859 if(what
& trackdb_directories
)
1861 && l
== last_dir_len
1862 && !memcmp(last_dir
, k
.data
, l
))) {
1863 last_dir
= xstrndup(k
.data
, last_dir_len
= l
);
1864 if(track_matches(dl
, k
.data
, l
, re
))
1865 vector_append(v
, last_dir
);
1868 /* found a plain file */
1869 if((what
& trackdb_files
)) {
1870 track
= xstrndup(k
.data
, k
.size
);
1871 if((err
= trackdb_getdata(trackdb_prefsdb
,
1872 track
, &p
, tid
)) == DB_LOCK_DEADLOCK
)
1874 /* if this file has an alias in the same directory then we skip it */
1875 if((err
= compute_alias(&alias
, track
, p
, tid
)))
1877 if(!(alias
&& !strcmp(d_dirname(alias
), d_dirname(track
))))
1878 if(track_matches(dl
, k
.data
, k
.size
, re
))
1879 vector_append(v
, track
);
1882 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
1890 case DB_LOCK_DEADLOCK
:
1891 error(0, "error querying database: %s", db_strerror(err
));
1894 fatal(0, "error querying database: %s", db_strerror(err
));
1897 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
1901 /* return the directories or files below @dir@ */
1902 char **trackdb_list(const char *dir
, int *np
, enum trackdb_listable what
,
1910 tid
= trackdb_begin_transaction();
1913 if(do_list(&v
, dir
, what
, re
, tid
))
1916 for(n
= 0; n
< config
->collection
.n
; ++n
)
1917 if(do_list(&v
, config
->collection
.s
[n
].root
, what
, re
, tid
))
1922 trackdb_abort_transaction(tid
);
1924 trackdb_commit_transaction(tid
);
1925 vector_terminate(&v
);
1931 /* If S is tag:something, return something. Else return 0. */
1932 static const char *checktag(const char *s
) {
1933 if(!strncmp(s
, "tag:", 4))
1939 /* return a list of tracks containing all of the words given. If you
1940 * ask for only stopwords you get no tracks. */
1941 char **trackdb_search(char **wordlist
, int nwordlist
, int *ntracks
) {
1942 const char **w
, *best
= 0, *tag
;
1943 char **twords
, **tags
;
1945 int i
, j
, n
, err
, what
;
1955 *ntracks
= 0; /* for early returns */
1956 /* normalize all the words */
1957 w
= xmalloc(nwordlist
* sizeof (char *));
1958 istag
= xmalloc_noptr(nwordlist
);
1959 for(n
= 0; n
< nwordlist
; ++n
) {
1963 w
[n
] = utf8_casefold_compat(wordlist
[n
], strlen(wordlist
[n
]), 0);
1964 if(checktag(w
[n
])) {
1965 ++ntags
; /* count up tags */
1966 /* Normalize the tag */
1967 w
[n
] = normalize_tag(w
[n
] + 4, strlen(w
[n
] + 4));
1970 /* Normalize the search term by removing combining characters */
1971 if(!(w32
= utf8_to_utf32(w
[n
], strlen(w
[n
]), &nw32
)))
1973 nw32
= remove_combining_chars(w32
, nw32
);
1974 if(!(w
[n
] = utf32_to_utf8(w32
, nw32
, 0)))
1979 /* find the longest non-stopword */
1980 for(n
= 0; n
< nwordlist
; ++n
)
1981 if(!istag
[n
] && !stopword(w
[n
]))
1982 if(!best
|| strlen(w
[n
]) > strlen(best
))
1984 /* TODO: we should at least in principal be able to identify the word or tag
1985 * with the least matches in log time, and choose that as our primary search
1987 if(ntags
&& !best
) {
1988 /* Only tags are listed. We limit to the first and narrow down with the
1990 best
= istag
[0] ? w
[0] : 0;
1991 db
= trackdb_tagsdb
;
1994 /* We can limit to some word. */
1995 db
= trackdb_searchdb
;
1998 /* Only stopwords */
2004 tid
= trackdb_begin_transaction();
2005 /* find all the tracks that have that word */
2010 cursor
= trackdb_opencursor(db
, tid
);
2011 while(!(err
= cursor
->c_get(cursor
, &k
, &d
, what
))) {
2012 vector_append(&v
, xstrndup(d
.data
, d
.size
));
2019 case DB_LOCK_DEADLOCK
:
2020 error(0, "error querying %s database: %s", dbname
, db_strerror(err
));
2023 fatal(0, "error querying %s database: %s", dbname
, db_strerror(err
));
2025 if(trackdb_closecursor(cursor
)) err
= DB_LOCK_DEADLOCK
;
2027 /* do a naive search over that (hopefuly fairly small) list of tracks */
2029 for(n
= 0; n
< v
.nvec
; ++n
) {
2030 if((err
= gettrackdata(v
.vec
[n
], 0, &p
, 0, 0, tid
) == DB_LOCK_DEADLOCK
))
2033 error(0, "track %s unexpected error: %s", v
.vec
[n
], db_strerror(err
));
2036 twords
= track_to_words(v
.vec
[n
], p
);
2037 tags
= parsetags(kvp_get(p
, "tags"));
2038 for(i
= 0; i
< nwordlist
; ++i
) {
2041 /* Track must have this tag */
2042 for(j
= 0; tags
[j
]; ++j
)
2043 if(!strcmp(tag
, tags
[j
])) break; /* tag found */
2044 if(!tags
[j
]) break; /* tag not found */
2046 /* Track must contain this word */
2047 for(j
= 0; twords
[j
]; ++j
)
2048 if(!strcmp(w
[i
], twords
[j
])) break; /* word found */
2049 if(!twords
[j
]) break; /* word not found */
2052 if(i
>= nwordlist
) /* all words found */
2053 vector_append(&u
, v
.vec
[n
]);
2057 trackdb_closecursor(cursor
);
2059 trackdb_abort_transaction(tid
);
2060 info("retrying search");
2062 trackdb_commit_transaction(tid
);
2063 vector_terminate(&u
);
2069 /* trackdb_scan **************************************************************/
2071 int trackdb_scan(const char *root
,
2072 int (*callback
)(const char *track
,
2080 const size_t root_len
= root ?
strlen(root
) : 0;
2085 cursor
= trackdb_opencursor(trackdb_tracksdb
, tid
);
2087 err
= cursor
->c_get(cursor
, make_key(&k
, root
), prepare_data(&d
),
2090 memset(&k
, 0, sizeof k
);
2091 err
= cursor
->c_get(cursor
, &k
, prepare_data(&d
),
2096 || (k
.size
> root_len
2097 && !strncmp(k
.data
, root
, root_len
)
2098 && ((char *)k
.data
)[root_len
] == '/')) {
2099 data
= kvp_urldecode(d
.data
, d
.size
);
2100 if(kvp_get(data
, "_path")) {
2101 track
= xstrndup(k
.data
, k
.size
);
2102 /* Advance to the next track before the callback so that the callback
2103 * may safely delete the track */
2104 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
2105 if((cberr
= callback(track
, data
, u
, tid
))) {
2110 err
= cursor
->c_get(cursor
, &k
, &d
, DB_NEXT
);
2114 trackdb_closecursor(cursor
);
2121 case DB_LOCK_DEADLOCK
:
2122 error(0, "c->c_get: %s", db_strerror(err
));
2125 fatal(0, "c->c_get: %s", db_strerror(err
));
2129 /* trackdb_rescan ************************************************************/
2131 /* called when the rescanner terminates */
2132 static int reap_rescan(ev_source
attribute((unused
)) *ev
,
2135 const struct rusage
attribute((unused
)) *rusage
,
2136 void attribute((unused
)) *u
) {
2137 if(pid
== rescan_pid
) rescan_pid
= -1;
2139 error(0, RESCAN
": %s", wstat(status
));
2141 D((RESCAN
" terminated: %s", wstat(status
)));
2142 /* Our cache of file lookups is out of date now */
2143 cache_clean(&cache_files_type
);
2144 eventlog("rescanned", (char *)0);
2148 void trackdb_rescan(ev_source
*ev
) {
2151 if(rescan_pid
!= -1) {
2152 error(0, "rescan already underway");
2155 rescan_pid
= subprogram(ev
, RESCAN
, -1);
2157 ev_child(ev
, rescan_pid
, 0, reap_rescan
, 0);
2158 D(("started rescanner"));
2160 /* This is the first rescan, we block until it is complete */
2161 while(waitpid(rescan_pid
, &w
, 0) < 0 && errno
== EINTR
)
2163 reap_rescan(0, rescan_pid
, w
, 0, 0);
2167 int trackdb_rescan_cancel(void) {
2168 if(rescan_pid
== -1) return 0;
2169 if(kill(rescan_pid
, SIGTERM
) < 0)
2170 fatal(errno
, "error killing rescanner");
2175 /* global prefs **************************************************************/
2177 void trackdb_set_global(const char *name
,
2185 tid
= trackdb_begin_transaction();
2186 if(!(err
= trackdb_set_global_tid(name
, value
, tid
)))
2188 trackdb_abort_transaction(tid
);
2190 trackdb_commit_transaction(tid
);
2191 /* log important state changes */
2192 if(!strcmp(name
, "playing")) {
2193 state
= !value
|| !strcmp(value
, "yes");
2194 info("playing %s by %s",
2195 state ?
"enabled" : "disabled",
2197 eventlog("state", state ?
"enable_play" : "disable_play", (char *)0);
2199 if(!strcmp(name
, "random-play")) {
2200 state
= !value
|| !strcmp(value
, "yes");
2201 info("random play %s by %s",
2202 state ?
"enabled" : "disabled",
2204 eventlog("state", state ?
"enable_random" : "disable_random", (char *)0);
2206 if(!strcmp(name
, "required-tags"))
2210 int trackdb_set_global_tid(const char *name
,
2216 memset(&k
, 0, sizeof k
);
2217 memset(&d
, 0, sizeof d
);
2218 k
.data
= (void *)name
;
2219 k
.size
= strlen(name
);
2221 d
.data
= (void *)value
;
2222 d
.size
= strlen(value
);
2225 err
= trackdb_globaldb
->put(trackdb_globaldb
, tid
, &k
, &d
, 0);
2227 err
= trackdb_globaldb
->del(trackdb_globaldb
, tid
, &k
, 0);
2228 if(err
== DB_LOCK_DEADLOCK
) return err
;
2230 fatal(0, "error updating database: %s", db_strerror(err
));
2234 const char *trackdb_get_global(const char *name
) {
2240 tid
= trackdb_begin_transaction();
2241 if(!(err
= trackdb_get_global_tid(name
, tid
, &r
)))
2243 trackdb_abort_transaction(tid
);
2245 trackdb_commit_transaction(tid
);
2249 int trackdb_get_global_tid(const char *name
,
2255 memset(&k
, 0, sizeof k
);
2256 k
.data
= (void *)name
;
2257 k
.size
= strlen(name
);
2258 switch(err
= trackdb_globaldb
->get(trackdb_globaldb
, tid
, &k
,
2259 prepare_data(&d
), 0)) {
2261 *rp
= xstrndup(d
.data
, d
.size
);
2266 case DB_LOCK_DEADLOCK
:
2269 fatal(0, "error reading database: %s", db_strerror(err
));
2273 /** @brief Retrieve the most recently added tracks
2274 * @param ntracksp Where to put count, or 0
2275 * @param maxtracks Maximum number of tracks to retrieve
2276 * @return null-terminated array of track names
2278 * The most recently added track is first in the array.
2280 char **trackdb_new(int *ntracksp
,
2286 tid
= trackdb_begin_transaction();
2287 tracks
= trackdb_new_tid(ntracksp
, maxtracks
, tid
);
2290 trackdb_abort_transaction(tid
);
2292 trackdb_commit_transaction(tid
);
2296 /** @brief Retrieve the most recently added tracks
2297 * @param ntracksp Where to put count, or 0
2298 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2299 * @param tid Transaction ID
2300 * @return null-terminated array of track names, or NULL on deadlock
2302 * The most recently added track is first in the array.
2304 static char **trackdb_new_tid(int *ntracksp
,
2310 struct vector tracks
[1];
2312 vector_init(tracks
);
2313 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2314 while((maxtracks
<= 0 || tracks
->nvec
< maxtracks
)
2315 && !(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_PREV
)))
2316 vector_append(tracks
, xstrndup(d
.data
, d
.size
));
2318 case 0: /* hit maxtracks */
2319 case DB_NOTFOUND
: /* ran out of tracks */
2321 case DB_LOCK_DEADLOCK
:
2322 trackdb_closecursor(c
);
2325 fatal(0, "error reading noticed.db: %s", db_strerror(err
));
2327 if((err
= trackdb_closecursor(c
)))
2328 return 0; /* deadlock */
2329 vector_terminate(tracks
);
2331 *ntracksp
= tracks
->nvec
;
2335 /** @brief Expire noticed.db
2336 * @param earliest Earliest timestamp to keep
2338 void trackdb_expire_noticed(time_t earliest
) {
2342 tid
= trackdb_begin_transaction();
2343 if(!trackdb_expire_noticed_tid(earliest
, tid
))
2345 trackdb_abort_transaction(tid
);
2347 trackdb_commit_transaction(tid
);
2350 /** @brief Expire noticed.db
2351 * @param earliest Earliest timestamp to keep
2352 * @param tid Transaction ID
2353 * @return 0 or DB_LOCK_DEADLOCK
2355 static int trackdb_expire_noticed_tid(time_t earliest
, DB_TXN
*tid
) {
2363 c
= trackdb_opencursor(trackdb_noticeddb
, tid
);
2364 while(!(err
= c
->c_get(c
, prepare_data(&k
), prepare_data(&d
), DB_NEXT
))) {
2366 when
= (time_t)(((uint64_t)ntohl(kk
[0]) << 32) + ntohl(kk
[1]));
2367 if(when
>= earliest
)
2369 if((err
= c
->c_del(c
, 0))) {
2370 if(err
!= DB_LOCK_DEADLOCK
)
2371 fatal(0, "error deleting expired noticed.db entry: %s",
2377 if(err
== DB_NOTFOUND
)
2379 if(err
&& err
!= DB_LOCK_DEADLOCK
)
2380 fatal(0, "error expiring noticed.db: %s", db_strerror(err
));
2382 if((err
= trackdb_closecursor(c
))) {
2383 if(err
!= DB_LOCK_DEADLOCK
)
2384 fatal(0, "error closing cursor: %s", db_strerror(err
));
2388 info("expired %d tracks from noticed.db", count
);
2392 /* tidying up ****************************************************************/
2394 void trackdb_gc(void) {
2398 if((err
= trackdb_env
->txn_checkpoint(trackdb_env
,
2399 config
->checkpoint_kbyte
,
2400 config
->checkpoint_min
,
2402 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err
));
2403 if((err
= trackdb_env
->log_archive(trackdb_env
, &logfiles
, DB_ARCH_REMOVE
)))
2404 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err
));
2405 /* This makes catastrophic recovery impossible. However, the user can still
2406 * preserve the important data by using disorder-dump to snapshot their
2407 * prefs, and later to restore it. This is likely to have much small
2408 * long-term storage requirements than record the db logfiles. */
2411 /* user database *************************************************************/
2413 /** @brief Return true if @p user is trusted */
2414 static int trusted(const char *user
) {
2417 for(n
= 0; (n
< config
->trust
.n
2418 && strcmp(config
->trust
.s
[n
], user
)); ++n
)
2420 return n
< config
->trust
.n
;
2423 /** @brief Add a user */
2424 static int create_user(const char *user
,
2425 const char *password
,
2433 /* data for this user */
2435 kvp_set(&k
, "password", password
);
2436 kvp_set(&k
, "rights", rights
);
2438 kvp_set(&k
, "email", email
);
2439 snprintf(s
, sizeof s
, "%jd", (intmax_t)time(0));
2440 kvp_set(&k
, "created", s
);
2441 return trackdb_putdata(trackdb_usersdb
, user
, k
, tid
, flags
);
2444 /** @brief Add one pre-existing user */
2445 static int one_old_user(const char *user
, const char *password
,
2449 /* www-data doesn't get added */
2450 if(!strcmp(user
, "www-data")) {
2451 info("not adding www-data to user database");
2455 if(!strcmp(user
, "root"))
2457 else if(trusted(user
))
2458 rights
= rights_string(default_rights()|RIGHT_ADMIN
);
2460 rights
= rights_string(default_rights());
2461 return create_user(user
, password
, rights
, 0/*email*/, tid
, DB_NOOVERWRITE
);
2464 static int trackdb_old_users_tid(DB_TXN
*tid
) {
2467 for(n
= 0; n
< config
->allow
.n
; ++n
) {
2468 switch(one_old_user(config
->allow
.s
[n
].s
[0], config
->allow
.s
[n
].s
[1],
2471 info("created user %s from 'allow' directive", config
->allow
.s
[n
].s
[0]);
2474 error(0, "user %s already exists, delete 'allow' directive",
2475 config
->allow
.s
[n
].s
[0]);
2476 /* This won't ever become fatal - eventually 'allow' will be
2479 case DB_LOCK_DEADLOCK
:
2480 return DB_LOCK_DEADLOCK
;
2486 /** @brief Read old 'allow' directives and copy them to the users database */
2487 void trackdb_old_users(void) {
2491 WITH_TRANSACTION(trackdb_old_users_tid(tid
));
2494 /** @brief Create a root user in the user database if there is none */
2495 void trackdb_create_root(void) {
2500 /* Choose a new root password */
2501 gcry_randomize(pwbin
, sizeof pwbin
, GCRY_STRONG_RANDOM
);
2502 pw
= mime_to_base64(pwbin
, sizeof pwbin
);
2503 /* Create the root user if it does not exist */
2504 WITH_TRANSACTION(create_user("root", pw
, "all", 0/*email*/, tid
,
2507 info("created root user");
2510 /** @brief Find a user's password from the database
2511 * @param user Username
2512 * @return Password or NULL
2514 * Only works if running as a user that can read the database!
2516 * If the user exists but has no password, "" is returned.
2518 const char *trackdb_get_password(const char *user
) {
2521 const char *password
;
2523 WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb
, user
, &k
, tid
));
2526 password
= kvp_get(k
, "password");
2527 return password ? password
: "";
2530 /** @brief Add a new user
2531 * @param user Username
2532 * @param password Password or NULL
2533 * @param rights Initial rights
2534 * @param email Email address
2535 * @return 0 on success, non-0 on error
2537 int trackdb_adduser(const char *user
,
2538 const char *password
,
2540 const char *email
) {
2542 const char *r
= rights_string(rights
);
2544 WITH_TRANSACTION(create_user(user
, password
, r
, email
,
2545 tid
, DB_NOOVERWRITE
));
2547 error(0, "cannot created user '%s' because they already exist", user
);
2551 info("created user '%s' with rights '%s' and email address '%s'",
2554 info("created user '%s' with rights '%s'", user
, r
);
2559 /** @brief Delete a user
2560 * @param user User to delete
2561 * @param 0 on success, non-0 if the user didn't exist anyway
2563 int trackdb_deluser(const char *user
) {
2566 WITH_TRANSACTION(trackdb_delkey(trackdb_usersdb
, user
, tid
));
2568 error(0, "cannot delete user '%s' because they do not exist", user
);
2571 info("deleted user '%s'", user
);
2575 /** @brief Get user information
2576 * @param user User to query
2577 * @return Linked list of user information or NULL if user does not exist
2579 * Every user has at least a @c rights entry so NULL can be used to mean no
2582 struct kvp
*trackdb_getuserinfo(const char *user
) {
2586 WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb
, user
, &k
, tid
));
2593 /** @brief Edit user information
2594 * @param user User to edit
2595 * @param key Key to change
2596 * @param value Value to set, or NULL to remove
2597 * @param tid Transaction ID
2598 * @return 0, DB_LOCK_DEADLOCK or DB_NOTFOUND
2600 static int trackdb_edituserinfo_tid(const char *user
, const char *key
,
2601 const char *value
, DB_TXN
*tid
) {
2605 if((e
= trackdb_getdata(trackdb_usersdb
, user
, &k
, tid
)))
2607 if(!kvp_set(&k
, key
, value
))
2608 return 0; /* no change */
2609 return trackdb_putdata(trackdb_usersdb
, user
, k
, tid
, 0);
2612 /** @brief Edit user information
2613 * @param user User to edit
2614 * @param key Key to change
2615 * @param value Value to set, or NULL to remove
2616 * @return 0 on success, non-0 on error
2618 int trackdb_edituserinfo(const char *user
,
2619 const char *key
, const char *value
) {
2622 if(!strcmp(key
, "rights")) {
2624 error(0, "cannot remove 'rights' key from user '%s'", user
);
2627 if(parse_rights(value
, 0)) {
2628 error(0, "invalid rights string");
2631 } else if(!strcmp(key
, "email")) {
2632 if(!strchr(value
, '@')) {
2633 error(0, "invalid email address '%s' for user '%s'", user
, value
);
2636 } else if(!strcmp(key
, "created")) {
2637 error(0, "cannot change creation date for user '%s'", user
);
2639 } else if(strcmp(key
, "password")
2640 && !strcmp(key
, "confirmation")) {
2641 error(0, "unknown user info key '%s' for user '%s'", key
, user
);
2644 WITH_TRANSACTION(trackdb_edituserinfo_tid(user
, key
, value
, tid
));
2646 error(0, "unknown user '%s'", user
);
2652 /** @brief List all users
2653 * @return NULL-terminated list of users
2655 char **trackdb_listusers(void) {
2660 WITH_TRANSACTION(trackdb_listkeys(trackdb_usersdb
, v
, tid
));
2669 indent-tabs-mode:nil