2 * This file is part of DisOrder
3 * Copyright (C) 2005-2008 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 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU 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, see <http://www.gnu.org/licenses/>.
18 /** @file lib/trackdb.c
19 * @brief Track database
21 * This file is getting in desparate need of splitting up...
27 #include <sys/socket.h>
33 #include <sys/resource.h>
35 #include <arpa/inet.h>
47 #include "configuration.h"
52 #include "trackname.h"
53 #include "trackdb-int.h"
63 #define RESCAN "disorder-rescan"
64 #define DEADLOCK "disorder-deadlock"
66 static const char *getpart(const char *track,
71 static char **trackdb_new_tid(int *ntracksp,
74 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
75 static char *normalize_tag(const char *s, size_t ns);
77 const struct cache_type cache_files_type = { 86400 };
78 unsigned long cache_files_hits, cache_files_misses;
80 /** @brief Set by trackdb_open() */
81 int trackdb_existing_database;
83 /* setup and teardown ********************************************************/
85 static const char *home; /* home had better not change */
86 DB_ENV *trackdb_env; /* db environment */
88 /** @brief The tracks database
89 * - Keys are UTF-8(NFC(unicode(path name)))
90 * - Values are encoded key-value pairs
91 * - Data is reconstructable data about tracks that currently exist
95 /** @brief The preferences database
97 * - Keys are UTF-8(NFC(unicode(path name)))
98 * - Values are encoded key-value pairs
99 * - Data is user data about tracks (that might not exist any more)
100 * and cannot be reconstructed
104 /** @brief The search database
106 * - Keys are UTF-8(NFKC(casefold(search term)))
107 * - Values are UTF-8(NFC(unicode(path name)))
108 * - There can be more than one value per key
109 * - Presence of key,value means that path matches the search terms
110 * - Only tracks fond in @ref trackdb_tracksdb are represented here
111 * - This database can be reconstructed, it contains no user data
113 DB *trackdb_searchdb;
115 /** @brief The tags database
117 * - Keys are UTF-8(NFKC(casefold(tag)))
118 * - Values are UTF-8(NFC(unicode(path name)))
119 * - There can be more than one value per key
120 * - Presence of key,value means that path matches the tag
121 * - This is always in sync with the tags preference
122 * - This database can be reconstructed, it contains no user data
124 DB *trackdb_tagsdb; /* the tags database */
126 /** @brief The global preferences database
127 * - Keys are UTF-8(NFC(preference))
128 * - Values are global preference values
129 * - Data is user data and cannot be reconstructed
131 DB *trackdb_globaldb; /* global preferences */
133 /** @brief The noticed database
134 * - Keys are 64-bit big-endian timestamps
135 * - Values are UTF-8(NFC(unicode(path name)))
136 * - There can be more than one value per key
137 * - Presence of key,value means that path was added at the given time
138 * - Data cannot be reconstructed (but isn't THAT important)
140 DB *trackdb_noticeddb; /* when track noticed */
142 /** @brief The schedule database
144 * - Keys are ID strings, generated at random
145 * - Values are encoded key-value pairs
146 * - There can be more than one value per key
147 * - Data cannot be reconstructed
149 * See @ref server/schedule.c for further information.
151 DB *trackdb_scheduledb;
153 /** @brief The user database
154 * - Keys are usernames
155 * - Values are encoded key-value pairs
156 * - Data is user data and cannot be reconstructed
160 /** @brief The playlists database
161 * - Keys are playlist names
162 * - Values are encoded key-value pairs
163 * - Data is user data and cannot be reconstructed
165 DB *trackdb_playlistsdb;
167 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
168 static pid_t rescan_pid = -1; /* rescanner PID */
169 static int initialized, opened; /* state */
171 /* comparison function for keys */
172 static int compare(DB attribute((unused)) *db_,
173 const DBT *a, const DBT *b) {
174 return compare_path_raw(a->data, a->size, b->data, b->size);
177 /** @brief Test whether the track database can be read
178 * @return 1 if it can, 0 if it cannot
180 int trackdb_readable(void) {
183 byte_xasprintf(&usersdb, "%s/users.db", config->home);
184 return access(usersdb, R_OK) == 0;
187 /** @brief Open database environment
188 * @param flags Flags word
190 * Flags should be one of:
191 * - @ref TRACKDB_NO_RECOVER
192 * - @ref TRACKDB_NORMAL_RECOVER
193 * - @ref TRACKDB_FATAL_RECOVER
194 * - @ref TRACKDB_MAY_CREATE
196 void trackdb_init(int flags) {
198 const int recover = flags & TRACKDB_RECOVER_MASK;
199 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
202 assert(initialized == 0);
205 if(strcmp(home, config->home))
206 fatal(0, "cannot change db home without server restart");
210 if(flags & TRACKDB_MAY_CREATE) {
216 /* Remove world/group permissions on any regular files already in the
217 * database directory. Actually we don't care about all of them but it's
218 * easier to just do the lot. This can be revisited if it's a serious
219 * practical inconvenience for anyone.
221 * The socket, not being a regular file, is excepted.
223 if(!(dp = opendir(config->home)))
224 fatal(errno, "error reading %s", config->home);
225 while((de = readdir(dp))) {
226 byte_xasprintf(&p, "%s/%s", config->home, de->d_name);
227 if(lstat(p, &st) == 0
228 && S_ISREG(st.st_mode)
229 && (st.st_mode & 077)) {
230 if(chmod(p, st.st_mode & 07700) < 0)
231 fatal(errno, "cannot chmod %s", p);
238 /* create environment */
239 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
241 if((err = trackdb_env->set_alloc(trackdb_env,
242 xmalloc_noptr, xrealloc_noptr, xfree)))
243 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
244 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
245 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
246 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
247 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
248 if((err = trackdb_env->open(trackdb_env, config->home,
254 |recover_type[recover],
256 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
257 trackdb_env->set_errpfx(trackdb_env, "DB");
258 trackdb_env->set_errfile(trackdb_env, stderr);
259 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
260 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
261 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
262 D(("initialized database environment"));
265 /* called when deadlock manager terminates */
266 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
267 pid_t attribute((unused)) pid,
269 const struct rusage attribute((unused)) *rusage,
270 void attribute((unused)) *u) {
271 db_deadlock_pid = -1;
273 fatal(0, "deadlock manager unexpectedly terminated: %s",
276 D(("deadlock manager terminated: %s", wstat(status)));
280 static pid_t subprogram(ev_source *ev, int outputfd, const char *prog,
284 const char *args[1024], **argp, *a;
288 *argp++ = "--config";
289 *argp++ = configfile;
290 *argp++ = debugging ? "--debug" : "--no-debug";
291 *argp++ = log_default == &log_syslog ? "--syslog" : "--no-syslog";
293 while((a = va_arg(ap, const char *)))
297 /* If we're in the background then trap subprocess stdout/stderr */
298 if(!(pid = xfork())) {
301 ev_signal_atfork(ev);
302 signal(SIGPIPE, SIG_DFL);
307 /* ensure we don't leak privilege anywhere */
308 if(setuid(geteuid()) < 0)
309 fatal(errno, "error calling setuid");
310 /* If we were negatively niced, undo it. We don't bother checking for
311 * error, it's not that important. */
312 setpriority(PRIO_PROCESS, 0, 0);
313 execvp(prog, (char **)args);
314 fatal(errno, "error invoking %s", prog);
319 /* start deadlock manager */
320 void trackdb_master(ev_source *ev) {
321 assert(db_deadlock_pid == -1);
322 db_deadlock_pid = subprogram(ev, -1, DEADLOCK, (char *)0);
323 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
324 D(("started deadlock manager"));
327 /* close environment */
328 void trackdb_deinit(void) {
332 assert(initialized == 1);
335 /* close the environment */
336 if((err = trackdb_env->close(trackdb_env, 0)))
337 fatal(0, "trackdb_env->close: %s", db_strerror(err));
339 if(rescan_pid != -1) {
340 /* shut down the rescanner */
341 if(kill(rescan_pid, SIGTERM) < 0)
342 fatal(errno, "error killing rescanner");
343 /* wait for the rescanner to finish */
344 while(waitpid(rescan_pid, &err, 0) == -1 && errno == EINTR)
348 /* TODO kill any stats subprocesses */
350 /* finally terminate the deadlock manager */
351 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
352 fatal(errno, "error killing deadlock manager");
353 db_deadlock_pid = -1;
355 D(("deinitialized database environment"));
358 /* open a specific database */
359 static DB *open_db(const char *path,
367 D(("open %s", path));
368 path = config_get_file(path);
369 if((err = db_create(&db, trackdb_env, 0)))
370 fatal(0, "db_create %s: %s", path, db_strerror(err));
372 if((err = db->set_flags(db, dbflags)))
373 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
374 if(dbtype == DB_BTREE)
375 if((err = db->set_bt_compare(db, compare)))
376 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
377 if((err = db->open(db, 0, path, 0, dbtype,
378 openflags | DB_AUTO_COMMIT, mode))) {
379 if((openflags & DB_CREATE) || errno != ENOENT) {
380 if((err2 = db->close(db, 0)))
381 error(0, "db->close: %s", db_strerror(err2));
383 trackdb_env->close(trackdb_env,0);
385 fatal(0, "db->open %s: %s", path, db_strerror(err));
393 /** @brief Open track databases
394 * @param flags Flags flags word
396 * @p flags should have one of:
397 * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted
398 * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted
399 * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade
401 * - @p TRACKDB_READ_ONLY, read only access
403 void trackdb_open(int flags) {
406 uint32_t dbflags = flags & TRACKDB_READ_ONLY ? DB_RDONLY : DB_CREATE;
411 /* check the database version first */
412 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_RDONLY, 0666);
413 if(trackdb_globaldb) {
414 /* This is an existing database */
418 s = trackdb_get_global("_dbversion");
419 /* Close the database again, we'll open it property below */
420 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
421 fatal(0, "error closing global.db: %s", db_strerror(err));
422 trackdb_globaldb = 0;
423 /* Convert version string to an integer */
424 oldversion = s ? atol(s) : 1;
425 if(oldversion > config->dbversion) {
426 /* Database is from the future; we never allow this. */
427 fatal(0, "this version of DisOrder is too old for database version %ld",
430 if(oldversion < config->dbversion) {
431 /* Database version is out of date */
432 switch(flags & TRACKDB_UPGRADE_MASK) {
433 case TRACKDB_NO_UPGRADE:
434 /* This database needs upgrading but this is not permitted */
435 fatal(0, "database needs upgrading from %ld to %ld",
436 oldversion, config->dbversion);
437 case TRACKDB_CAN_UPGRADE:
438 /* This database needs upgrading */
439 info("invoking disorder-dbupgrade to upgrade from %ld to %ld",
440 oldversion, config->dbversion);
441 pid = subprogram(0, -1, "disorder-dbupgrade", (char *)0);
442 while(waitpid(pid, &err, 0) == -1 && errno == EINTR)
445 fatal(0, "disorder-dbupgrade %s", wstat(err));
446 info("disorder-dbupgrade succeeded");
448 case TRACKDB_OPEN_FOR_UPGRADE:
454 if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) {
455 /* This doesn't make any sense */
456 fatal(0, "database is already at current version");
458 trackdb_existing_database = 1;
460 if(flags & TRACKDB_OPEN_FOR_UPGRADE) {
461 /* Cannot upgrade a new database */
462 fatal(0, "cannot upgrade a database that does not exist");
464 /* This is a brand new database */
465 trackdb_existing_database = 0;
467 /* open the databases */
468 if(!(trackdb_usersdb = open_db("users.db",
469 0, DB_HASH, dbflags, 0600)))
470 fatal(0, "cannot open users.db");
471 trackdb_tracksdb = open_db("tracks.db",
472 DB_RECNUM, DB_BTREE, dbflags, 0666);
473 trackdb_searchdb = open_db("search.db",
474 DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666);
475 trackdb_tagsdb = open_db("tags.db",
476 DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666);
477 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, dbflags, 0666);
478 trackdb_globaldb = open_db("global.db", 0, DB_HASH, dbflags, 0666);
479 trackdb_noticeddb = open_db("noticed.db",
480 DB_DUPSORT, DB_BTREE, dbflags, 0666);
481 trackdb_scheduledb = open_db("schedule.db", 0, DB_HASH, dbflags, 0666);
482 trackdb_playlistsdb = open_db("playlists.db", 0, DB_HASH, dbflags, 0666);
483 if(!trackdb_existing_database && !(flags & TRACKDB_READ_ONLY)) {
484 /* Stash the database version */
487 assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE));
488 snprintf(buf, sizeof buf, "%ld", config->dbversion);
489 trackdb_set_global("_dbversion", buf, 0);
491 D(("opened databases"));
494 /* close track databases */
495 void trackdb_close(void) {
501 #define CLOSE(N, V) do { \
502 if(V && (err = V->close(V, 0))) \
503 fatal(0, "error closing %s: %s", N, db_strerror(err)); \
506 CLOSE("tracks.db", trackdb_tracksdb);
507 CLOSE("search.db", trackdb_searchdb);
508 CLOSE("tags.db", trackdb_tagsdb);
509 CLOSE("prefs.db", trackdb_prefsdb);
510 CLOSE("global.db", trackdb_globaldb);
511 CLOSE("noticed.db", trackdb_noticeddb);
512 CLOSE("schedule.db", trackdb_scheduledb);
513 CLOSE("users.db", trackdb_usersdb);
514 CLOSE("playlists.db", trackdb_playlistsdb);
515 D(("closed databases"));
518 /* generic db routines *******************************************************/
520 /** @brief Fetch and decode a database entry
522 * @param track Track name
523 * @param kp Where to put decoded list (or NULL if you don't care)
524 * @param tid Owning transaction
525 * @return 0, @c DB_NOTFOUND or @c DB_LOCK_DEADLOCK
527 int trackdb_getdata(DB *db,
534 switch(err = db->get(db, tid, make_key(&key, track),
535 prepare_data(&data), 0)) {
538 *kp = kvp_urldecode(data.data, data.size);
544 case DB_LOCK_DEADLOCK:
545 error(0, "error querying database: %s", db_strerror(err));
548 fatal(0, "error querying database: %s", db_strerror(err));
552 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
553 * DB_LOCK_DEADLOCK. */
554 int trackdb_putdata(DB *db,
562 switch(err = db->put(db, tid, make_key(&key, track),
563 encode_data(&data, k), flags)) {
567 case DB_LOCK_DEADLOCK:
568 error(0, "error updating database: %s", db_strerror(err));
571 fatal(0, "error updating database: %s", db_strerror(err));
575 /** @brief Delete a database entry
577 * @param track Key to delete
578 * @param tid Transaction ID
579 * @return 0, DB_NOTFOUND or DB_LOCK_DEADLOCK
581 int trackdb_delkey(DB *db,
587 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
591 case DB_LOCK_DEADLOCK:
592 error(0, "error updating database: %s", db_strerror(err));
595 fatal(0, "error updating database: %s", db_strerror(err));
599 /* open a database cursor */
600 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
604 switch(err = db->cursor(db, tid, &c, 0)) {
606 default: fatal(0, "error creating cursor: %s", db_strerror(err));
611 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
612 int trackdb_closecursor(DBC *c) {
616 switch(err = c->c_close(c)) {
619 case DB_LOCK_DEADLOCK:
620 error(0, "error closing cursor: %s", db_strerror(err));
623 fatal(0, "error closing cursor: %s", db_strerror(err));
627 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
628 int trackdb_delkeydata(DB *db,
636 c = trackdb_opencursor(db, tid);
637 switch(err = c->c_get(c, make_key(&key, word),
638 make_key(&data, track), DB_GET_BOTH)) {
640 switch(err = c->c_del(c, 0)) {
646 case DB_LOCK_DEADLOCK:
647 error(0, "error updating database: %s", db_strerror(err));
650 fatal(0, "c->c_del: %s", db_strerror(err));
655 case DB_LOCK_DEADLOCK:
656 error(0, "error updating database: %s", db_strerror(err));
659 fatal(0, "c->c_get: %s", db_strerror(err));
661 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
665 /* start a transaction */
666 DB_TXN *trackdb_begin_transaction(void) {
670 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
671 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
675 /* abort transaction */
676 void trackdb_abort_transaction(DB_TXN *tid) {
680 if((err = tid->abort(tid)))
681 fatal(0, "tid->abort: %s", db_strerror(err));
684 /* commit transaction */
685 void trackdb_commit_transaction(DB_TXN *tid) {
688 if((err = tid->commit(tid, 0)))
689 fatal(0, "tid->commit: %s", db_strerror(err));
692 /* search/tags shared code ***************************************************/
694 /* comparison function used by dedupe() */
695 static int wordcmp(const void *a, const void *b) {
696 return strcmp(*(const char **)a, *(const char **)b);
699 /* sort and de-dupe VEC */
700 static char **dedupe(char **vec, int nvec) {
703 qsort(vec, nvec, sizeof (char *), wordcmp);
707 for(n = 1; n < nvec; ++n)
708 if(strcmp(vec[n], vec[m - 1]))
715 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
716 static int register_word(DB *db, const char *what,
717 const char *track, const char *word,
722 switch(err = db->put(db, tid, make_key(&key, word),
723 make_key(&data, track), DB_NODUPDATA)) {
727 case DB_LOCK_DEADLOCK:
728 error(0, "error updating %s.db: %s", what, db_strerror(err));
731 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
735 /* search primitives *********************************************************/
737 /* return true iff NAME is a trackname_display_ pref */
738 static int is_display_pref(const char *name) {
739 static const char prefix[] = "trackname_display_";
740 return !strncmp(name, prefix, (sizeof prefix) - 1);
743 /** @brief Word_Break property tailor that treats underscores as spaces */
744 static int tailor_underscore_Word_Break_Other(uint32_t c) {
748 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
749 return unicode_Word_Break_Other;
753 /** @brief Remove all combining characters in-place
754 * @param s Pointer to start of string
755 * @param ns Length of string
756 * @return New, possiblby reduced, length
758 static size_t remove_combining_chars(uint32_t *s, size_t ns) {
759 uint32_t *start = s, *t = s, *end = s + ns;
762 const uint32_t c = *s++;
763 if(!utf32_combining_class(c))
769 /** @brief Normalize and split a string using a given tailoring */
770 static void word_split(struct vector *v,
772 unicode_property_tailor *pt) {
774 uint32_t *t32, **w32;
776 /* Convert to UTF-32 */
777 if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32)))
779 /* Erase case distinctions */
780 if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32)))
782 /* Drop combining characters */
783 nt32 = remove_combining_chars(t32, nt32);
784 /* Split into words, treating _ as a space */
785 w32 = utf32_word_split(t32, nt32, &nw, pt);
786 /* Convert words back to UTF-8 and append to result */
787 for(i = 0; i < nw; ++i)
788 vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
791 /** @brief Normalize a tag
793 * @param ns Length of tag
794 * @return Normalized string or NULL on error
796 * The return value will be:
798 * - have no leading or trailing space
799 * - have no combining characters
800 * - all spacing between words will be a single U+0020 SPACE
802 static char *normalize_tag(const char *s, size_t ns) {
803 uint32_t *s32, **w32;
804 size_t ns32, nw32, i;
807 if(!(s32 = utf8_to_utf32(s, ns, &ns32)))
809 if(!(s32 = utf32_casefold_compat(s32, ns32, &ns32))) /* ->NFKD */
811 ns32 = remove_combining_chars(s32, ns32);
812 /* Split into words, no Word_Break tailoring */
813 w32 = utf32_word_split(s32, ns32, &nw32, 0);
814 /* Compose back into a string */
816 for(i = 0; i < nw32; ++i) {
818 dynstr_append(d, ' ');
819 dynstr_append_string(d, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
825 /* compute the words of a track name */
826 static char **track_to_words(const char *track,
827 const struct kvp *p) {
829 const char *rootless = track_rootless(track);
832 rootless = track; /* bodge */
834 rootless = strip_extension(rootless);
835 word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other);
836 for(; p; p = p->next)
837 if(is_display_pref(p->name))
838 word_split(&v, p->value, 0);
839 vector_terminate(&v);
840 return dedupe(v.vec, v.nvec);
843 /* return nonzero iff WORD is a stopword */
844 static int stopword(const char *word) {
847 for(n = 0; n < config->stopword.n
848 && strcmp(word, config->stopword.s[n]); ++n)
850 return n < config->stopword.n;
853 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
854 static int register_search_word(const char *track, const char *word,
856 if(stopword(word)) return 0;
857 return register_word(trackdb_searchdb, "search", track, word, tid);
860 /* Tags **********************************************************************/
862 /* Return nonzero if C is a valid tag character */
863 static int tagchar(int c) {
872 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
873 char **parsetags(const char *s) {
879 /* skip initial separators */
880 while(*s && (!tagchar(*s) || *s == ' '))
883 /* find the extent of the tag */
885 while(*s && tagchar(*s))
887 /* strip trailing spaces */
888 while(s > t && s[-1] == ' ')
890 /* add tag to list */
891 vector_append(&v, normalize_tag(t, (size_t)(s - t)));
892 /* skip intermediate and trailing separators */
893 while(*s && (!tagchar(*s) || *s == ' '))
897 vector_terminate(&v);
898 return dedupe(v.vec, v.nvec);
901 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
902 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
903 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
906 /* aliases *******************************************************************/
908 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
909 * there is no alias sets *aliasp to 0. */
910 static int compute_alias(char **aliasp,
915 const char *s = config->alias, *t, *expansion, *part;
916 int c, used_db = 0, slash_prefix, err;
918 const char *const root = find_track_root(track);
921 /* Bodge for tracks with no root */
926 dynstr_append_string(&d, root);
927 while((c = (unsigned char)*s++)) {
929 dynstr_append(&d, c);
932 if((slash_prefix = (*s == '/')))
935 assert(t != 0); /* validated at startup */
936 part = xstrndup(s, t - s);
937 expansion = getpart(track, "display", part, p, &used_db);
939 if(slash_prefix) dynstr_append(&d, '/');
940 dynstr_append_string(&d, expansion);
942 s = t + 1; /* skip {part} */
944 /* only admit to the alias if we used the db... */
949 dynstr_terminate(&d);
950 /* ...and the answer differs from the original... */
951 if(!strcmp(track, d.vec)) {
955 /* ...and there isn't already a different track with that name (including as
957 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
959 if((s = kvp_get(at, "_alias_for"))
960 && !strcmp(s, track)) {
972 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
973 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
974 * Always sets the return values, even if only to null pointers. */
975 static int gettrackdata(const char *track,
978 const char **actualp,
980 #define GTD_NOALIAS 0x0001
983 const char *actual = track;
984 struct kvp *t = 0, *p = 0;
986 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
987 if((actual = kvp_get(t, "_alias_for"))) {
988 if(flags & GTD_NOALIAS) {
989 error(0, "alias passed to gettrackdata where real path required");
992 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
997 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
1002 if(actualp) *actualp = actual;
1008 /* trackdb_notice() **********************************************************/
1010 /** @brief notice a possibly new track
1011 * @return @c DB_NOTFOUND if new, 0 if already known
1013 int trackdb_notice(const char *track,
1019 tid = trackdb_begin_transaction();
1020 err = trackdb_notice_tid(track, path, tid);
1021 if((err == DB_LOCK_DEADLOCK)) goto fail;
1024 trackdb_abort_transaction(tid);
1026 trackdb_commit_transaction(tid);
1030 /** @brief notice a possibly new track
1031 * @param track NFC UTF-8 track name
1032 * @param path Raw path name
1033 * @param tid Transaction ID
1034 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
1036 int trackdb_notice_tid(const char *track,
1040 struct kvp *t, *a, *p;
1042 char *alias, **w, *noticed;
1045 /* notice whether the tracks.db entry changes */
1047 /* get any existing tracks entry */
1048 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1050 ret = err; /* 0 or DB_NOTFOUND */
1051 /* this is a real track */
1052 t_changed += kvp_set(&t, "_alias_for", 0);
1053 t_changed += kvp_set(&t, "_path", path);
1055 if(ret == DB_NOTFOUND) {
1056 /* It's a new track; record the time */
1057 byte_xasprintf(¬iced, "%lld", (long long)now);
1058 t_changed += kvp_set(&t, "_noticed", noticed);
1060 /* if we have an alias record it in the database */
1061 if((err = compute_alias(&alias, track, p, tid))) return err;
1063 /* won't overwrite someone else's alias as compute_alias() checks */
1064 D(("%s: alias %s", track, alias));
1066 kvp_set(&a, "_alias_for", track);
1067 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
1069 /* update search.db */
1070 w = track_to_words(track, p);
1071 for(n = 0; w[n]; ++n)
1072 if((err = register_search_word(track, w[n], tid)))
1074 /* update tags.db */
1075 w = parsetags(kvp_get(p, "tags"));
1076 for(n = 0; w[n]; ++n)
1077 if((err = register_tag(track, w[n], tid)))
1079 /* only store the tracks.db entry if it has changed */
1080 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
1082 if(ret == DB_NOTFOUND) {
1083 uint32_t timestamp[2];
1086 timestamp[0] = htonl((uint64_t)now >> 32);
1087 timestamp[1] = htonl((uint32_t)now);
1088 memset(&key, 0, sizeof key);
1089 key.data = timestamp;
1090 key.size = sizeof timestamp;
1091 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
1092 make_key(&data, track), 0)) {
1094 case DB_LOCK_DEADLOCK: return err;
1095 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
1101 /* trackdb_obsolete() ********************************************************/
1103 /* obsolete a track */
1104 int trackdb_obsolete(const char *track, DB_TXN *tid) {
1109 if((err = gettrackdata(track, 0, &p, 0,
1110 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
1112 else if(err == DB_NOTFOUND) return 0;
1113 /* compute the alias, if any, and delete it */
1114 if((err = compute_alias(&alias, track, p, tid))) return err;
1116 /* if the alias points to some other track then compute_alias won't
1118 if((err = trackdb_delkey(trackdb_tracksdb, alias, tid))
1119 && err != DB_NOTFOUND)
1122 /* update search.db */
1123 w = track_to_words(track, p);
1124 for(n = 0; w[n]; ++n)
1125 if(trackdb_delkeydata(trackdb_searchdb,
1126 w[n], track, tid) == DB_LOCK_DEADLOCK)
1128 /* update tags.db */
1129 w = parsetags(kvp_get(p, "tags"));
1130 for(n = 0; w[n]; ++n)
1131 if(trackdb_delkeydata(trackdb_tagsdb,
1132 w[n], track, tid) == DB_LOCK_DEADLOCK)
1134 /* update tracks.db */
1135 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
1137 /* We don't delete the prefs, so they survive temporary outages of the
1138 * (possibly virtual) track filesystem */
1142 /* trackdb_stats() ***********************************************************/
1144 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
1145 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
1147 static const struct statinfo {
1150 } statinfo_hash[] = {
1166 }, statinfo_btree[] = {
1187 /* look up stats for DB */
1188 static int get_stats(struct vector *v,
1190 const struct statinfo *si,
1199 switch(err = database->stat(database, tid, &sp, 0)) {
1202 case DB_LOCK_DEADLOCK:
1203 error(0, "error querying database: %s", db_strerror(err));
1206 fatal(0, "error querying database: %s", db_strerror(err));
1208 for(n = 0; n < nsi; ++n) {
1209 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
1210 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
1211 vector_append(v, str);
1217 /** @brief One entry in the search league */
1218 struct search_entry {
1223 /** @brief Add a word to the search league
1224 * @param se Pointer to search league
1225 * @param count Maximum size for search league
1226 * @param nse Current size of search league
1227 * @param word New word, or NULL
1228 * @param n How often @p word appears
1229 * @return New size of search league
1231 static int register_search_entry(struct search_entry *se,
1238 if(word && (nse < count || n > se[nse - 1].n)) {
1239 /* Find the starting point */
1244 /* Find the insertion point */
1245 while(i > 0 && n > se[i - 1].n)
1247 memmove(&se[i + 1], &se[i], (nse - i - 1) * sizeof *se);
1254 /* find the top COUNT words in the search database */
1255 static int search_league(struct vector *v, int count, DB_TXN *tid) {
1256 struct search_entry *se;
1259 int err, n = 0, nse = 0, i;
1264 cursor = trackdb_opencursor(trackdb_searchdb, tid);
1265 se = xmalloc(count * sizeof *se);
1266 /* Walk across the whole database counting up the number of times each
1268 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
1270 if(word && wl == k.size && !strncmp(word, k.data, wl))
1271 ++n; /* same word again */
1273 nse = register_search_entry(se, count, nse, word, n);
1274 word = xstrndup(k.data, wl = k.size);
1282 case DB_LOCK_DEADLOCK:
1283 error(0, "error querying search database: %s", db_strerror(err));
1286 fatal(0, "error querying search database: %s", db_strerror(err));
1288 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1290 nse = register_search_entry(se, count, nse, word, n);
1291 byte_xasprintf(&str, "Top %d search words:", nse);
1292 vector_append(v, str);
1293 for(i = 0; i < nse; ++i) {
1294 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1295 vector_append(v, str);
1300 #define SI(what) statinfo_##what, \
1301 sizeof statinfo_##what / sizeof (struct statinfo)
1303 /* return a list of database stats */
1304 char **trackdb_stats(int *nstatsp) {
1310 tid = trackdb_begin_transaction();
1312 vector_append(&v, (char *)"Tracks database stats:");
1313 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1314 vector_append(&v, (char *)"");
1315 vector_append(&v, (char *)"Search database stats:");
1316 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1317 vector_append(&v, (char *)"");
1318 vector_append(&v, (char *)"Prefs database stats:");
1319 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1320 vector_append(&v, (char *)"");
1321 if(search_league(&v, 10, tid)) goto fail;
1322 vector_terminate(&v);
1325 trackdb_abort_transaction(tid);
1327 trackdb_commit_transaction(tid);
1328 if(nstatsp) *nstatsp = v.nvec;
1332 struct stats_details {
1333 void (*done)(char *data, void *u);
1335 int exited; /* subprocess exited */
1336 int closed; /* pipe close */
1337 int wstat; /* wait status from subprocess */
1338 struct dynstr data[1]; /* data read from pipe */
1341 static void stats_complete(struct stats_details *d) {
1344 if(!(d->exited && d->closed))
1346 byte_xasprintf(&s, "\n"
1348 "track lookup cache hits: %lu\n"
1349 "track lookup cache misses: %lu\n",
1351 cache_files_misses);
1352 dynstr_append_string(d->data, s);
1353 dynstr_terminate(d->data);
1354 d->done(d->data->vec, d->u);
1357 static int stats_finished(ev_source attribute((unused)) *ev,
1358 pid_t attribute((unused)) pid,
1360 const struct rusage attribute((unused)) *rusage,
1362 struct stats_details *const d = u;
1366 error(0, "disorder-stats %s", wstat(status));
1371 static int stats_read(ev_source attribute((unused)) *ev,
1377 struct stats_details *const d = u;
1379 dynstr_append_bytes(d->data, ptr, bytes);
1380 ev_reader_consume(reader, bytes);
1387 static int stats_error(ev_source attribute((unused)) *ev,
1390 struct stats_details *const d = u;
1392 error(errno_value, "error reading from pipe to disorder-stats");
1398 void trackdb_stats_subprocess(ev_source *ev,
1399 void (*done)(char *data, void *u),
1403 struct stats_details *d = xmalloc(sizeof *d);
1405 dynstr_init(d->data);
1409 pid = subprogram(ev, p[1], "disorder-stats", (char *)0);
1411 ev_child(ev, pid, 0, stats_finished, d);
1412 if(!ev_reader_new(ev, p[0], stats_read, stats_error, d,
1413 "disorder-stats reader"))
1414 fatal(0, "ev_reader_new for disorder-stats reader failed");
1417 /** @brief Parse a track name part preference
1418 * @param name Preference name
1419 * @param partp Where to store part name
1420 * @param contextp Where to store context name
1421 * @return 0 on success, non-0 if parse fails
1423 static int trackdb__parse_namepref(const char *name,
1427 static const char prefix[] = "trackname_";
1429 if(strncmp(name, prefix, strlen(prefix)))
1430 return -1; /* not trackname_* at all */
1431 name += strlen(prefix);
1432 /* There had better be a _ between context and part */
1433 c = strchr(name, '_');
1436 /* Context is first in the pref name even though most APIs have the part
1437 * first. Confusing; sorry. */
1438 *contextp = xstrndup(name, c - name);
1440 /* There had better NOT be a second _ */
1443 *partp = xstrdup(c);
1447 /** @brief Compute the default value for a track preference
1448 * @param track Track name
1449 * @param name Preference name
1450 * @return Default value or 0 if none/not known
1452 static const char *trackdb__default(const char *track, const char *name) {
1453 char *context, *part;
1455 if(!trackdb__parse_namepref(name, &part, &context)) {
1456 /* We can work out the default for a trackname_ pref */
1457 return trackname_part(track, context, part);
1458 } else if(!strcmp(name, "weight")) {
1459 /* We know the default weight */
1461 } else if(!strcmp(name, "pick_at_random")) {
1462 /* By default everything is eligible for picking at random */
1464 } else if(!strcmp(name, "tags")) {
1465 /* By default everything no track has any tags */
1471 /* set a pref (remove if value=0) */
1472 int trackdb_set(const char *track,
1474 const char *value) {
1475 struct kvp *t, *p, *a;
1478 char *oldalias, *newalias, **oldtags = 0, **newtags;
1481 /* If the value matches the default then unset instead, to keep the database
1482 * tidy. Older versions did not have this feature so your database may yet
1483 * have some default values stored in it. */
1485 def = trackdb__default(track, name);
1486 if(def && !strcmp(value, def))
1491 tid = trackdb_begin_transaction();
1492 if((err = gettrackdata(track, &t, &p, 0,
1493 0, tid)) == DB_LOCK_DEADLOCK)
1495 if(err == DB_NOTFOUND) break;
1496 if(name[0] == '_') {
1497 if(kvp_set(&t, name, value))
1498 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1501 /* get the old alias name */
1502 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1503 /* get the old tags */
1504 if(!strcmp(name, "tags"))
1505 oldtags = parsetags(kvp_get(p, "tags"));
1507 if(kvp_set(&p, name, value))
1508 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1510 /* compute the new alias name */
1511 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1512 /* check whether alias has changed */
1513 if(!(oldalias == newalias
1514 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1515 /* adjust alias records to fit change */
1517 && trackdb_delkey(trackdb_tracksdb, oldalias, tid) == DB_LOCK_DEADLOCK)
1521 kvp_set(&a, "_alias_for", track);
1522 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1525 /* check whether tags have changed */
1526 if(!strcmp(name, "tags")) {
1527 newtags = parsetags(value);
1528 while(*oldtags || *newtags) {
1529 if(*oldtags && *newtags) {
1530 cmp = strcmp(*oldtags, *newtags);
1532 /* keeping this tag */
1536 /* old tag fits into a gap in the new list, so delete old */
1539 /* new tag fits into a gap in the old list, so insert new */
1541 } else if(*oldtags) {
1542 /* we've run out of new tags, so remaining old ones are to be
1545 if(trackdb_delkeydata(trackdb_tagsdb,
1546 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1550 /* we've run out of old tags, so remainig new ones are to be
1553 if(register_tag(track, *newtags, tid)) goto fail;
1562 trackdb_abort_transaction(tid);
1564 trackdb_commit_transaction(tid);
1565 return err == 0 ? 0 : -1;
1569 const char *trackdb_get(const char *track,
1571 return kvp_get(trackdb_get_all(track), name);
1574 /* get all prefs as a 0-terminated array */
1575 struct kvp *trackdb_get_all(const char *track) {
1576 struct kvp *t, *p, **pp;
1580 tid = trackdb_begin_transaction();
1581 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1585 trackdb_abort_transaction(tid);
1587 trackdb_commit_transaction(tid);
1588 for(pp = &p; *pp; pp = &(*pp)->next)
1595 const char *trackdb_resolve(const char *track) {
1600 tid = trackdb_begin_transaction();
1601 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1605 trackdb_abort_transaction(tid);
1607 trackdb_commit_transaction(tid);
1611 int trackdb_isalias(const char *track) {
1612 const char *actual = trackdb_resolve(track);
1614 return strcmp(actual, track);
1617 /* test whether a track exists (perhaps an alias) */
1618 int trackdb_exists(const char *track) {
1623 tid = trackdb_begin_transaction();
1624 /* unusually, here we want the return value */
1625 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1629 trackdb_abort_transaction(tid);
1631 trackdb_commit_transaction(tid);
1635 /* return the list of tags */
1636 char **trackdb_alltags(void) {
1641 WITH_TRANSACTION(trackdb_listkeys(trackdb_tagsdb, v, tid));
1645 /** @brief List all the keys in @p db
1646 * @param db Database
1647 * @param v Vector to store keys in
1648 * @param tid Transaction ID
1649 * @return 0 or DB_LOCK_DEADLOCK
1651 int trackdb_listkeys(DB *db, struct vector *v, DB_TXN *tid) {
1654 DBC *const c = trackdb_opencursor(db, tid);
1657 memset(&k, 0, sizeof k);
1658 while(!(e = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1659 vector_append(v, xstrndup(k.data, k.size));
1663 case DB_LOCK_DEADLOCK:
1666 fatal(0, "c->c_get: %s", db_strerror(e));
1668 if((e = trackdb_closecursor(c)))
1670 vector_terminate(v);
1674 /* return 1 iff sorted tag lists A and B have at least one member in common */
1675 int tag_intersection(char **a, char **b) {
1678 /* Same sort of logic as trackdb_set() above */
1680 if(!(cmp = strcmp(*a, *b))) return 1;
1681 else if(cmp < 0) ++a;
1687 static pid_t choose_pid = -1;
1688 static int choose_fd;
1689 static random_callback *choose_callback;
1690 static struct dynstr choose_output;
1691 static unsigned choose_complete;
1692 static int choose_status;
1693 #define CHOOSE_RUNNING 1
1694 #define CHOOSE_READING 2
1696 static void choose_finished(ev_source *ev, unsigned which) {
1697 choose_complete |= which;
1698 if(choose_complete != (CHOOSE_RUNNING|CHOOSE_READING))
1701 if(choose_status == 0 && choose_output.nvec > 0) {
1702 dynstr_terminate(&choose_output);
1703 choose_callback(ev, xstrdup(choose_output.vec));
1705 choose_callback(ev, 0);
1708 /** @brief Called when @c disorder-choose terminates */
1709 static int choose_exited(ev_source *ev,
1710 pid_t attribute((unused)) pid,
1712 const struct rusage attribute((unused)) *rusage,
1713 void attribute((unused)) *u) {
1715 error(0, "disorder-choose %s", wstat(status));
1716 choose_status = status;
1717 choose_finished(ev, CHOOSE_RUNNING);
1721 /** @brief Called with data from @c disorder-choose pipe */
1722 static int choose_readable(ev_source *ev,
1727 void attribute((unused)) *u) {
1728 dynstr_append_bytes(&choose_output, ptr, bytes);
1729 ev_reader_consume(reader, bytes);
1731 choose_finished(ev, CHOOSE_READING);
1735 static int choose_read_error(ev_source *ev,
1737 void attribute((unused)) *u) {
1738 error(errno_value, "error reading disorder-choose pipe");
1739 choose_finished(ev, CHOOSE_READING);
1743 /** @brief Request a random track
1744 * @param ev Event source
1745 * @param callback Called with random track or NULL
1746 * @return 0 if a request was initiated, else -1
1748 * Initiates a random track choice. @p callback will later be called back with
1749 * the choice (or NULL on error). If a choice is already underway then -1 is
1750 * returned and there will be no additional callback.
1752 * The caller shouldn't assume that the track returned actually exists (it
1753 * might be removed between the choice and the callback, or between being added
1754 * to the queue and being played).
1756 int trackdb_request_random(ev_source *ev,
1757 random_callback *callback) {
1760 if(choose_pid != -1)
1761 return -1; /* don't run concurrent chooses */
1764 choose_pid = subprogram(ev, p[1], "disorder-choose", (char *)0);
1767 choose_callback = callback;
1768 choose_output.nvec = 0;
1769 choose_complete = 0;
1770 if(!ev_reader_new(ev, p[0], choose_readable, choose_read_error, 0,
1771 "disorder-choose reader")) /* owns p[0] */
1772 fatal(0, "ev_reader_new for disorder-choose reader failed");
1773 ev_child(ev, choose_pid, 0, choose_exited, 0); /* owns the subprocess */
1777 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1778 * from the prefs. */
1779 static const char *getpart(const char *track,
1780 const char *context,
1782 const struct kvp *p,
1787 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1788 if((result = kvp_get(p, pref)))
1791 result = trackname_part(track, context, part);
1792 assert(result != 0);
1796 /* get a track name part, like trackname_part(), but taking the database into
1798 const char *trackdb_getpart(const char *track,
1799 const char *context,
1807 /* construct the full pref */
1808 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1810 tid = trackdb_begin_transaction();
1811 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1815 trackdb_abort_transaction(tid);
1817 trackdb_commit_transaction(tid);
1818 return getpart(actual, context, part, p, &used_db);
1821 /* get the raw path name for @track@ (might be an alias) */
1822 const char *trackdb_rawpath(const char *track) {
1828 tid = trackdb_begin_transaction();
1829 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1833 trackdb_abort_transaction(tid);
1835 trackdb_commit_transaction(tid);
1836 if(!(path = kvp_get(t, "_path"))) path = track;
1840 /* trackdb_list **************************************************************/
1842 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1843 * readable at some point */
1845 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1846 * If RE is a null pointer then it matches everything. */
1847 static int track_matches(size_t dl, const char *track, size_t tl,
1855 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1856 case PCRE_ERROR_NOMATCH: return 0;
1859 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1866 static int do_list(struct vector *v, const char *dir,
1867 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1873 size_t l, last_dir_len = 0;
1874 char *last_dir = 0, *track;
1878 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1881 /* find the first key >= dir */
1882 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1883 /* keep going while we're dealing with <dir/anything> */
1886 && ((char *)k.data)[dl] == '/'
1887 && !memcmp(k.data, dir, dl)) {
1888 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1890 /* we have <dir/component/anything>, so <dir/component> is a directory */
1891 l = ptr - (char *)k.data;
1892 if(what & trackdb_directories)
1894 && l == last_dir_len
1895 && !memcmp(last_dir, k.data, l))) {
1896 last_dir = xstrndup(k.data, last_dir_len = l);
1897 if(track_matches(dl, k.data, l, re))
1898 vector_append(v, last_dir);
1901 /* found a plain file */
1902 if((what & trackdb_files)) {
1903 track = xstrndup(k.data, k.size);
1904 if((err = trackdb_getdata(trackdb_prefsdb,
1905 track, &p, tid)) == DB_LOCK_DEADLOCK)
1907 /* There's an awkward question here...
1909 * If a track shares a directory with its alias then we could
1910 * do one of three things:
1911 * - report both. Looks ridiculuous in most UIs.
1912 * - report just the alias. Remarkably inconvenient to write
1914 * - report just the real name. Ugly if the UI doesn't prettify
1915 * names via the name parts.
1918 /* If this file is an alias for a track in the same directory then we
1920 struct kvp *t = kvp_urldecode(d.data, d.size);
1921 const char *alias_target = kvp_get(t, "_alias_for");
1923 && !strcmp(d_dirname(alias_target),
1925 if(track_matches(dl, k.data, k.size, re))
1926 vector_append(v, track);
1928 /* if this file has an alias in the same directory then we skip it */
1930 if((err = compute_alias(&alias, track, p, tid)))
1932 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1933 if(track_matches(dl, k.data, k.size, re))
1934 vector_append(v, track);
1938 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1946 case DB_LOCK_DEADLOCK:
1947 error(0, "error querying database: %s", db_strerror(err));
1950 fatal(0, "error querying database: %s", db_strerror(err));
1953 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1957 /* return the directories or files below @dir@ */
1958 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1966 tid = trackdb_begin_transaction();
1969 if(do_list(&v, dir, what, re, tid))
1972 for(n = 0; n < config->collection.n; ++n)
1973 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1978 trackdb_abort_transaction(tid);
1980 trackdb_commit_transaction(tid);
1981 vector_terminate(&v);
1987 /* If S is tag:something, return something. Else return 0. */
1988 static const char *checktag(const char *s) {
1989 if(!strncmp(s, "tag:", 4))
1995 /* return a list of tracks containing all of the words given. If you
1996 * ask for only stopwords you get no tracks. */
1997 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1998 const char **w, *best = 0, *tag;
1999 char **twords, **tags;
2001 int i, j, n, err, what;
2011 *ntracks = 0; /* for early returns */
2012 /* normalize all the words */
2013 w = xmalloc(nwordlist * sizeof (char *));
2014 istag = xmalloc_noptr(nwordlist);
2015 for(n = 0; n < nwordlist; ++n) {
2019 w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0);
2020 if(checktag(w[n])) {
2021 ++ntags; /* count up tags */
2022 /* Normalize the tag */
2023 w[n] = normalize_tag(w[n] + 4, strlen(w[n] + 4));
2026 /* Normalize the search term by removing combining characters */
2027 if(!(w32 = utf8_to_utf32(w[n], strlen(w[n]), &nw32)))
2029 nw32 = remove_combining_chars(w32, nw32);
2030 if(!(w[n] = utf32_to_utf8(w32, nw32, 0)))
2035 /* find the longest non-stopword */
2036 for(n = 0; n < nwordlist; ++n)
2037 if(!istag[n] && !stopword(w[n]))
2038 if(!best || strlen(w[n]) > strlen(best))
2040 /* TODO: we should at least in principal be able to identify the word or tag
2041 * with the least matches in log time, and choose that as our primary search
2043 if(ntags && !best) {
2044 /* Only tags are listed. We limit to the first and narrow down with the
2046 best = istag[0] ? w[0] : 0;
2047 db = trackdb_tagsdb;
2050 /* We can limit to some word. */
2051 db = trackdb_searchdb;
2054 /* Only stopwords */
2060 tid = trackdb_begin_transaction();
2061 /* find all the tracks that have that word */
2066 cursor = trackdb_opencursor(db, tid);
2067 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
2068 vector_append(&v, xstrndup(d.data, d.size));
2075 case DB_LOCK_DEADLOCK:
2076 error(0, "error querying %s database: %s", dbname, db_strerror(err));
2079 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
2081 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
2083 /* do a naive search over that (hopefuly fairly small) list of tracks */
2085 for(n = 0; n < v.nvec; ++n) {
2086 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
2089 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
2092 twords = track_to_words(v.vec[n], p);
2093 tags = parsetags(kvp_get(p, "tags"));
2094 for(i = 0; i < nwordlist; ++i) {
2097 /* Track must have this tag */
2098 for(j = 0; tags[j]; ++j)
2099 if(!strcmp(tag, tags[j])) break; /* tag found */
2100 if(!tags[j]) break; /* tag not found */
2102 /* Track must contain this word */
2103 for(j = 0; twords[j]; ++j)
2104 if(!strcmp(w[i], twords[j])) break; /* word found */
2105 if(!twords[j]) break; /* word not found */
2108 if(i >= nwordlist) /* all words found */
2109 vector_append(&u, v.vec[n]);
2113 trackdb_closecursor(cursor);
2115 trackdb_abort_transaction(tid);
2116 info("retrying search");
2118 trackdb_commit_transaction(tid);
2119 vector_terminate(&u);
2125 /* trackdb_scan **************************************************************/
2127 int trackdb_scan(const char *root,
2128 int (*callback)(const char *track,
2137 const size_t root_len = root ? strlen(root) : 0;
2139 struct kvp *data, *prefs;
2142 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
2144 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
2147 memset(&k, 0, sizeof k);
2148 err = cursor->c_get(cursor, &k, prepare_data(&d),
2153 || (k.size > root_len
2154 && !strncmp(k.data, root, root_len)
2155 && ((char *)k.data)[root_len] == '/')) {
2156 data = kvp_urldecode(d.data, d.size);
2157 if(kvp_get(data, "_path")) {
2158 track = xstrndup(k.data, k.size);
2159 /* TODO: trackdb_prefsdb is currently a DB_HASH. This means we have to
2160 * do a lookup for every single track. In fact this is quite quick:
2161 * with around 10,000 tracks a complete scan is around 0.3s on my
2162 * 2.2GHz Athlon. However, if it were a DB_BTREE, we could do the same
2163 * linear walk as we already do over trackdb_tracksdb, and probably get
2164 * even higher performance. That would require upgrade logic to
2165 * translate old databases though.
2167 switch(err = trackdb_prefsdb->get(trackdb_prefsdb, tid, &k,
2168 prepare_data(&pd), 0)) {
2170 prefs = kvp_urldecode(pd.data, pd.size);
2175 case DB_LOCK_DEADLOCK:
2176 error(0, "getting prefs: %s", db_strerror(err));
2177 trackdb_closecursor(cursor);
2180 fatal(0, "getting prefs: %s", db_strerror(err));
2182 /* Advance to the next track before the callback so that the callback
2183 * may safely delete the track */
2184 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
2185 if((cberr = callback(track, data, prefs, u, tid))) {
2190 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
2194 trackdb_closecursor(cursor);
2201 case DB_LOCK_DEADLOCK:
2202 error(0, "c->c_get: %s", db_strerror(err));
2205 fatal(0, "c->c_get: %s", db_strerror(err));
2209 /* trackdb_rescan ************************************************************/
2211 /** @brief Node in the list of rescan-complete callbacks */
2212 struct rescanned_node {
2213 struct rescanned_node *next;
2214 void (*rescanned)(void *ru);
2218 /** @brief List of rescan-complete callbacks */
2219 static struct rescanned_node *rescanned_list;
2221 /** @brief Add a rescan completion callback */
2222 void trackdb_add_rescanned(void (*rescanned)(void *ru),
2225 struct rescanned_node *n = xmalloc(sizeof *n);
2226 n->next = rescanned_list;
2227 n->rescanned = rescanned;
2233 /* called when the rescanner terminates */
2234 static int reap_rescan(ev_source attribute((unused)) *ev,
2237 const struct rusage attribute((unused)) *rusage,
2238 void attribute((unused)) *u) {
2239 if(pid == rescan_pid) rescan_pid = -1;
2241 error(0, RESCAN": %s", wstat(status));
2243 D((RESCAN" terminated: %s", wstat(status)));
2244 /* Our cache of file lookups is out of date now */
2245 cache_clean(&cache_files_type);
2246 eventlog("rescanned", (char *)0);
2247 /* Call rescanned callbacks */
2248 while(rescanned_list) {
2249 void (*rescanned)(void *u_) = rescanned_list->rescanned;
2250 void *ru = rescanned_list->ru;
2252 rescanned_list = rescanned_list->next;
2258 /** @brief Initiate a rescan
2259 * @param ev Event loop or 0 to block
2260 * @param recheck 1 to recheck lengths, 0 to suppress check
2261 * @param rescanned Called on completion (if not NULL)
2262 * @param ru Passed to @p rescanned
2264 void trackdb_rescan(ev_source *ev, int recheck,
2265 void (*rescanned)(void *ru),
2269 if(rescan_pid != -1) {
2270 trackdb_add_rescanned(rescanned, ru);
2271 error(0, "rescan already underway");
2274 rescan_pid = subprogram(ev, -1, RESCAN,
2275 recheck ? "--check" : "--no-check",
2277 trackdb_add_rescanned(rescanned, ru);
2279 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
2280 D(("started rescanner"));
2282 /* This is the first rescan, we block until it is complete */
2283 while(waitpid(rescan_pid, &w, 0) < 0 && errno == EINTR)
2285 reap_rescan(0, rescan_pid, w, 0, 0);
2289 int trackdb_rescan_cancel(void) {
2290 if(rescan_pid == -1) return 0;
2291 if(kill(rescan_pid, SIGTERM) < 0)
2292 fatal(errno, "error killing rescanner");
2297 /** @brief Return true if a rescan is underway */
2298 int trackdb_rescan_underway(void) {
2299 return rescan_pid != -1;
2302 /* global prefs **************************************************************/
2304 void trackdb_set_global(const char *name,
2312 tid = trackdb_begin_transaction();
2313 if(!(err = trackdb_set_global_tid(name, value, tid)))
2315 trackdb_abort_transaction(tid);
2317 trackdb_commit_transaction(tid);
2318 /* log important state changes */
2319 if(!strcmp(name, "playing")) {
2320 state = !value || !strcmp(value, "yes");
2321 info("playing %s by %s",
2322 state ? "enabled" : "disabled",
2324 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
2326 if(!strcmp(name, "random-play")) {
2327 state = !value || !strcmp(value, "yes");
2328 info("random play %s by %s",
2329 state ? "enabled" : "disabled",
2331 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
2335 int trackdb_set_global_tid(const char *name,
2341 memset(&k, 0, sizeof k);
2342 memset(&d, 0, sizeof d);
2343 k.data = (void *)name;
2344 k.size = strlen(name);
2346 d.data = (void *)value;
2347 d.size = strlen(value);
2350 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
2352 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
2353 if(err == DB_LOCK_DEADLOCK) return err;
2355 fatal(0, "error updating database: %s", db_strerror(err));
2359 const char *trackdb_get_global(const char *name) {
2365 tid = trackdb_begin_transaction();
2366 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2368 trackdb_abort_transaction(tid);
2370 trackdb_commit_transaction(tid);
2374 int trackdb_get_global_tid(const char *name,
2380 memset(&k, 0, sizeof k);
2381 k.data = (void *)name;
2382 k.size = strlen(name);
2383 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2384 prepare_data(&d), 0)) {
2386 *rp = xstrndup(d.data, d.size);
2391 case DB_LOCK_DEADLOCK:
2394 fatal(0, "error reading database: %s", db_strerror(err));
2398 /** @brief Retrieve the most recently added tracks
2399 * @param ntracksp Where to put count, or 0
2400 * @param maxtracks Maximum number of tracks to retrieve
2401 * @return null-terminated array of track names
2403 * The most recently added track is first in the array.
2405 char **trackdb_new(int *ntracksp,
2411 tid = trackdb_begin_transaction();
2412 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2415 trackdb_abort_transaction(tid);
2417 trackdb_commit_transaction(tid);
2421 /** @brief Retrieve the most recently added tracks
2422 * @param ntracksp Where to put count, or 0
2423 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2424 * @param tid Transaction ID
2425 * @return null-terminated array of track names, or NULL on deadlock
2427 * The most recently added track is first in the array.
2429 static char **trackdb_new_tid(int *ntracksp,
2435 struct vector tracks[1];
2436 hash *h = hash_new(1);
2438 vector_init(tracks);
2439 c = trackdb_opencursor(trackdb_noticeddb, tid);
2440 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2441 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV))) {
2442 char *const track = xstrndup(d.data, d.size);
2443 /* Don't add any track more than once */
2444 if(hash_add(h, track, "", HASH_INSERT))
2446 /* See if the track still exists */
2447 err = trackdb_getdata(trackdb_tracksdb, track, NULL/*kp*/, tid);
2448 if(err == DB_NOTFOUND)
2449 continue; /* It doesn't, skip it */
2450 if(err == DB_LOCK_DEADLOCK)
2452 vector_append(tracks, track);
2455 case 0: /* hit maxtracks */
2456 case DB_NOTFOUND: /* ran out of tracks */
2458 case DB_LOCK_DEADLOCK:
2459 trackdb_closecursor(c);
2462 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2464 if((err = trackdb_closecursor(c)))
2465 return 0; /* deadlock */
2466 vector_terminate(tracks);
2468 *ntracksp = tracks->nvec;
2472 /** @brief Expire noticed.db
2473 * @param earliest Earliest timestamp to keep
2475 void trackdb_expire_noticed(time_t earliest) {
2479 tid = trackdb_begin_transaction();
2480 if(!trackdb_expire_noticed_tid(earliest, tid))
2482 trackdb_abort_transaction(tid);
2484 trackdb_commit_transaction(tid);
2487 /** @brief Expire noticed.db
2488 * @param earliest Earliest timestamp to keep
2489 * @param tid Transaction ID
2490 * @return 0 or DB_LOCK_DEADLOCK
2492 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2500 c = trackdb_opencursor(trackdb_noticeddb, tid);
2501 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2503 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2504 if(when >= earliest)
2506 if((err = c->c_del(c, 0))) {
2507 if(err != DB_LOCK_DEADLOCK)
2508 fatal(0, "error deleting expired noticed.db entry: %s",
2514 if(err == DB_NOTFOUND)
2516 if(err && err != DB_LOCK_DEADLOCK)
2517 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2519 if((err = trackdb_closecursor(c))) {
2520 if(err != DB_LOCK_DEADLOCK)
2521 fatal(0, "error closing cursor: %s", db_strerror(err));
2525 info("expired %d tracks from noticed.db", count);
2529 /* tidying up ****************************************************************/
2531 void trackdb_gc(void) {
2535 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2536 config->checkpoint_kbyte,
2537 config->checkpoint_min,
2539 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2540 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2541 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2542 /* This makes catastrophic recovery impossible. However, the user can still
2543 * preserve the important data by using disorder-dump to snapshot their
2544 * prefs, and later to restore it. This is likely to have much small
2545 * long-term storage requirements than record the db logfiles. */
2548 /* user database *************************************************************/
2550 /** @brief Return true if @p user is trusted */
2551 static int trusted(const char *user) {
2554 for(n = 0; (n < config->trust.n
2555 && strcmp(config->trust.s[n], user)); ++n)
2557 return n < config->trust.n;
2560 /** @brief Return non-zero for a valid username
2562 * Currently we only allow the letters and digits in ASCII. We could be more
2563 * liberal than this but it is a nice simple test. It is critical that
2564 * semicolons are never allowed.
2566 * NB also used by playlist_parse_name() to validate playlist names!
2568 int valid_username(const char *user) {
2572 const uint8_t c = *user++;
2573 /* For now we are very strict */
2574 if((c >= 'a' && c <= 'z')
2575 || (c >= 'A' && c <= 'Z')
2576 || (c >= '0' && c <= '9'))
2584 /** @brief Add a user */
2585 static int create_user(const char *user,
2586 const char *password,
2589 const char *confirmation,
2595 /* sanity check user */
2596 if(!valid_username(user)) {
2597 error(0, "invalid username '%s'", user);
2600 if(parse_rights(rights, 0, 1)) {
2601 error(0, "invalid rights string");
2604 /* data for this user */
2606 kvp_set(&k, "password", password);
2607 kvp_set(&k, "rights", rights);
2609 kvp_set(&k, "email", email);
2611 kvp_set(&k, "confirmation", confirmation);
2612 snprintf(s, sizeof s, "%jd", (intmax_t)xtime(0));
2613 kvp_set(&k, "created", s);
2614 return trackdb_putdata(trackdb_usersdb, user, k, tid, flags);
2617 /** @brief Add one pre-existing user */
2618 static int one_old_user(const char *user, const char *password,
2622 /* www-data doesn't get added */
2623 if(!strcmp(user, "www-data")) {
2624 info("not adding www-data to user database");
2628 if(!strcmp(user, "root"))
2630 else if(trusted(user)) {
2633 parse_rights(config->default_rights, &r, 1);
2634 r &= ~(rights_type)(RIGHT_SCRATCH__MASK|RIGHT_MOVE__MASK|RIGHT_REMOVE__MASK);
2635 r |= (RIGHT_ADMIN|RIGHT_RESCAN
2636 |RIGHT_SCRATCH_ANY|RIGHT_MOVE_ANY|RIGHT_REMOVE_ANY);
2637 rights = rights_string(r);
2639 rights = config->default_rights;
2640 return create_user(user, password, rights, 0/*email*/, 0/*confirmation*/,
2641 tid, DB_NOOVERWRITE);
2644 static int trackdb_old_users_tid(DB_TXN *tid) {
2647 for(n = 0; n < config->allow.n; ++n) {
2648 switch(one_old_user(config->allow.s[n].s[0], config->allow.s[n].s[1],
2651 info("created user %s from 'allow' directive", config->allow.s[n].s[0]);
2654 error(0, "user %s already exists, delete 'allow' directive",
2655 config->allow.s[n].s[0]);
2656 /* This won't ever become fatal - eventually 'allow' will be
2659 case DB_LOCK_DEADLOCK:
2660 return DB_LOCK_DEADLOCK;
2666 /** @brief Read old 'allow' directives and copy them to the users database */
2667 void trackdb_old_users(void) {
2671 WITH_TRANSACTION(trackdb_old_users_tid(tid));
2674 /** @brief Create a root user in the user database if there is none */
2675 void trackdb_create_root(void) {
2680 /* Choose a new root password */
2681 gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM);
2682 pw = mime_to_base64(pwbin, sizeof pwbin);
2683 /* Create the root user if it does not exist */
2684 WITH_TRANSACTION(create_user("root", pw, "all",
2685 0/*email*/, 0/*confirmation*/,
2686 tid, DB_NOOVERWRITE));
2688 info("created root user");
2691 /** @brief Find a user's password from the database
2692 * @param user Username
2693 * @return Password or NULL
2695 * Only works if running as a user that can read the database!
2697 * If the user exists but has no password, "" is returned.
2699 const char *trackdb_get_password(const char *user) {
2702 const char *password;
2704 WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid));
2707 password = kvp_get(k, "password");
2708 return password ? password : "";
2711 /** @brief Add a new user
2712 * @param user Username
2713 * @param password Password or NULL
2714 * @param rights Initial rights
2715 * @param email Email address or NULL
2716 * @param confirmation Confirmation string or NULL
2717 * @return 0 on success, non-0 on error
2719 int trackdb_adduser(const char *user,
2720 const char *password,
2723 const char *confirmation) {
2726 WITH_TRANSACTION(create_user(user, password, rights, email, confirmation,
2727 tid, DB_NOOVERWRITE));
2729 error(0, "cannot create user '%s' because they already exist", user);
2733 info("created user '%s' with rights '%s' and email address '%s'",
2734 user, rights, email);
2736 info("created user '%s' with rights '%s'", user, rights);
2737 eventlog("user_add", user, (char *)0);
2742 /** @brief Delete a user
2743 * @param user User to delete
2744 * @return 0 on success, non-0 if the user didn't exist anyway
2746 int trackdb_deluser(const char *user) {
2749 WITH_TRANSACTION(trackdb_delkey(trackdb_usersdb, user, tid));
2751 error(0, "cannot delete user '%s' because they do not exist", user);
2754 info("deleted user '%s'", user);
2755 eventlog("user_delete", user, (char *)0);
2759 /** @brief Get user information
2760 * @param user User to query
2761 * @return Linked list of user information or NULL if user does not exist
2763 * Every user has at least a @c rights entry so NULL can be used to mean no
2766 struct kvp *trackdb_getuserinfo(const char *user) {
2770 WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid));
2777 /** @brief Edit user information
2778 * @param user User to edit
2779 * @param key Key to change
2780 * @param value Value to set, or NULL to remove
2781 * @param tid Transaction ID
2782 * @return 0, DB_LOCK_DEADLOCK or DB_NOTFOUND
2784 static int trackdb_edituserinfo_tid(const char *user, const char *key,
2785 const char *value, DB_TXN *tid) {
2789 if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid)))
2791 if(!kvp_set(&k, key, value))
2792 return 0; /* no change */
2793 return trackdb_putdata(trackdb_usersdb, user, k, tid, 0);
2796 /** @brief Edit user information
2797 * @param user User to edit
2798 * @param key Key to change
2799 * @param value Value to set, or NULL to remove
2800 * @return 0 on success, non-0 on error
2802 int trackdb_edituserinfo(const char *user,
2803 const char *key, const char *value) {
2806 if(!strcmp(key, "rights")) {
2808 error(0, "cannot remove 'rights' key from user '%s'", user);
2811 if(parse_rights(value, 0, 1)) {
2812 error(0, "invalid rights string");
2815 } else if(!strcmp(key, "email")) {
2817 if(!email_valid(value)) {
2818 error(0, "invalid email address '%s' for user '%s'", value, user);
2822 value = 0; /* no email -> remove key */
2823 } else if(!strcmp(key, "created")) {
2824 error(0, "cannot change creation date for user '%s'", user);
2826 } else if(strcmp(key, "password")
2827 && !strcmp(key, "confirmation")) {
2828 error(0, "unknown user info key '%s' for user '%s'", key, user);
2831 WITH_TRANSACTION(trackdb_edituserinfo_tid(user, key, value, tid));
2833 error(0, "unknown user '%s'", user);
2836 eventlog("user_edit", user, key, (char *)0);
2841 /** @brief List all users
2842 * @return NULL-terminated list of users
2844 char **trackdb_listusers(void) {
2849 WITH_TRANSACTION(trackdb_listkeys(trackdb_usersdb, v, tid));
2853 /** @brief Confirm a user registration
2854 * @param user Username
2855 * @param confirmation Confirmation string
2856 * @param rightsp Where to put user rights
2857 * @param tid Transaction ID
2858 * @return 0 on success, non-0 on error
2860 static int trackdb_confirm_tid(const char *user, const char *confirmation,
2861 rights_type *rightsp,
2863 const char *stored_confirmation;
2868 if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid)))
2870 if(!(stored_confirmation = kvp_get(k, "confirmation"))) {
2871 error(0, "already confirmed user '%s'", user);
2872 /* DB claims -30,800 to -30,999 so -1 should be a safe bet */
2875 if(!(rights = kvp_get(k, "rights"))) {
2876 error(0, "no rights for unconfirmed user '%s'", user);
2879 if(parse_rights(rights, rightsp, 1))
2881 if(strcmp(confirmation, stored_confirmation)) {
2882 error(0, "wrong confirmation string for user '%s'", user);
2886 kvp_set(&k, "confirmation", 0);
2887 return trackdb_putdata(trackdb_usersdb, user, k, tid, 0);
2890 /** @brief Confirm a user registration
2891 * @param user Username
2892 * @param confirmation Confirmation string
2893 * @param rightsp Where to put user rights
2894 * @return 0 on success, non-0 on error
2896 int trackdb_confirm(const char *user, const char *confirmation,
2897 rights_type *rightsp) {
2900 WITH_TRANSACTION(trackdb_confirm_tid(user, confirmation, rightsp, tid));
2903 info("registration confirmed for user '%s'", user);
2904 eventlog("user_confirm", user, (char *)0);
2907 error(0, "confirmation for nonexistent user '%s'", user);
2909 default: /* already reported */
2919 indent-tabs-mode:nil