2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track,
65 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
66 static int trackdb_get_global_tid(const char *name,
69 static char **trackdb_new_tid(int *ntracksp,
73 const struct cache_type cache_files_type = { 86400 };
74 unsigned long cache_files_hits, cache_files_misses;
76 /* setup and teardown ********************************************************/
78 static const char *home; /* home had better not change */
79 DB_ENV *trackdb_env; /* db environment */
80 DB *trackdb_tracksdb; /* the db itself */
81 DB *trackdb_prefsdb; /* preferences */
82 DB *trackdb_searchdb; /* the search database */
83 DB *trackdb_tagsdb; /* the tags database */
84 DB *trackdb_globaldb; /* global preferences */
85 DB *trackdb_noticeddb; /* when track noticed */
86 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
87 static pid_t rescan_pid = -1; /* rescanner PID */
88 static int initialized, opened; /* state */
90 /* tracks matched by required_tags */
91 static char **reqtracks;
92 static size_t nreqtracks;
94 /* comparison function for keys */
95 static int compare(DB attribute((unused)) *db_,
96 const DBT *a, const DBT *b) {
97 return compare_path_raw(a->data, a->size, b->data, b->size);
100 /* open environment */
101 void trackdb_init(int recover) {
103 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
106 assert(initialized == 0);
109 if(strcmp(home, config->home))
110 fatal(0, "cannot change db home without server restart");
114 /* create environment */
115 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
117 if((err = trackdb_env->set_alloc(trackdb_env,
118 xmalloc_noptr, xrealloc_noptr, xfree)))
119 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
120 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
121 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
122 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
123 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
124 if((err = trackdb_env->open(trackdb_env, config->home,
130 |recover_type[recover],
132 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
133 trackdb_env->set_errpfx(trackdb_env, "DB");
134 trackdb_env->set_errfile(trackdb_env, stderr);
135 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
136 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
137 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
138 D(("initialized database environment"));
141 /* called when deadlock manager terminates */
142 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
143 pid_t attribute((unused)) pid,
145 const struct rusage attribute((unused)) *rusage,
146 void attribute((unused)) *u) {
147 db_deadlock_pid = -1;
149 fatal(0, "deadlock manager unexpectedly terminated: %s",
152 D(("deadlock manager terminated: %s", wstat(status)));
156 static pid_t subprogram(ev_source *ev, const char *prog) {
160 /* If we're in the background then trap subprocess stdout/stderr */
162 lfd = logfd(ev, prog);
165 if(!(pid = xfork())) {
167 ev_signal_atfork(ev);
168 signal(SIGPIPE, SIG_DFL);
173 /* If we were negatively niced, undo it. We don't bother checking for
174 * error, it's not that important. */
175 setpriority(PRIO_PROCESS, 0, 0);
176 execlp(prog, prog, "--config", configfile,
177 debugging ? "--debug" : "--no-debug",
179 fatal(errno, "error invoking %s", prog);
181 if(lfd != -1) xclose(lfd);
185 /* start deadlock manager */
186 void trackdb_master(ev_source *ev) {
187 assert(db_deadlock_pid == -1);
188 db_deadlock_pid = subprogram(ev, DEADLOCK);
189 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
190 D(("started deadlock manager"));
193 /* close environment */
194 void trackdb_deinit(void) {
198 assert(initialized == 1);
201 /* close the environment */
202 if((err = trackdb_env->close(trackdb_env, 0)))
203 fatal(0, "trackdb_env->close: %s", db_strerror(err));
205 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
206 fatal(errno, "error killing rescanner");
208 /* terminate the deadlock manager */
209 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
210 fatal(errno, "error killing deadlock manager");
211 db_deadlock_pid = -1;
213 D(("deinitialized database environment"));
216 /* open a specific database */
217 static DB *open_db(const char *path,
225 D(("open %s", path));
226 path = config_get_file(path);
227 if((err = db_create(&db, trackdb_env, 0)))
228 fatal(0, "db_create %s: %s", path, db_strerror(err));
230 if((err = db->set_flags(db, dbflags)))
231 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
232 if(dbtype == DB_BTREE)
233 if((err = db->set_bt_compare(db, compare)))
234 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
235 if((err = db->open(db, 0, path, 0, dbtype,
236 openflags | DB_AUTO_COMMIT, mode)))
237 fatal(0, "db->open %s: %s", path, db_strerror(err));
241 /* open track databases */
242 void trackdb_open(void) {
246 /* open the databases */
247 trackdb_tracksdb = open_db("tracks.db",
248 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
249 trackdb_searchdb = open_db("search.db",
250 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
251 trackdb_tagsdb = open_db("tags.db",
252 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
253 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
254 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
255 trackdb_noticeddb = open_db("noticed.db",
256 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
257 D(("opened databases"));
260 /* close track databases */
261 void trackdb_close(void) {
267 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
268 fatal(0, "error closing tracks.db: %s", db_strerror(err));
269 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
270 fatal(0, "error closing search.db: %s", db_strerror(err));
271 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
272 fatal(0, "error closing tags.db: %s", db_strerror(err));
273 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
274 fatal(0, "error closing prefs.db: %s", db_strerror(err));
275 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
276 fatal(0, "error closing global.db: %s", db_strerror(err));
277 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
278 fatal(0, "error closing noticed.db: %s", db_strerror(err));
279 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
280 trackdb_tagsdb = trackdb_globaldb = 0;
281 D(("closed databases"));
284 /* generic db routines *******************************************************/
286 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
287 * DB_LOCK_DEADLOCK. */
288 int trackdb_getdata(DB *db,
295 switch(err = db->get(db, tid, make_key(&key, track),
296 prepare_data(&data), 0)) {
298 *kp = kvp_urldecode(data.data, data.size);
303 case DB_LOCK_DEADLOCK:
304 error(0, "error querying database: %s", db_strerror(err));
307 fatal(0, "error querying database: %s", db_strerror(err));
311 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
312 * DB_LOCK_DEADLOCK. */
313 int trackdb_putdata(DB *db,
321 switch(err = db->put(db, tid, make_key(&key, track),
322 encode_data(&data, k), flags)) {
326 case DB_LOCK_DEADLOCK:
327 error(0, "error updating database: %s", db_strerror(err));
330 fatal(0, "error updating database: %s", db_strerror(err));
334 /* delete a database entry */
335 int trackdb_delkey(DB *db,
341 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
345 case DB_LOCK_DEADLOCK:
346 error(0, "error updating database: %s", db_strerror(err));
349 fatal(0, "error updating database: %s", db_strerror(err));
353 /* open a database cursor */
354 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
358 switch(err = db->cursor(db, tid, &c, 0)) {
360 default: fatal(0, "error creating cursor: %s", db_strerror(err));
365 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
366 int trackdb_closecursor(DBC *c) {
370 switch(err = c->c_close(c)) {
373 case DB_LOCK_DEADLOCK:
374 error(0, "error closing cursor: %s", db_strerror(err));
377 fatal(0, "error closing cursor: %s", db_strerror(err));
381 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
382 int trackdb_delkeydata(DB *db,
390 c = trackdb_opencursor(db, tid);
391 switch(err = c->c_get(c, make_key(&key, word),
392 make_key(&data, track), DB_GET_BOTH)) {
394 switch(err = c->c_del(c, 0)) {
400 case DB_LOCK_DEADLOCK:
401 error(0, "error updating database: %s", db_strerror(err));
404 fatal(0, "c->c_del: %s", db_strerror(err));
409 case DB_LOCK_DEADLOCK:
410 error(0, "error updating database: %s", db_strerror(err));
413 fatal(0, "c->c_get: %s", db_strerror(err));
415 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
419 /* start a transaction */
420 DB_TXN *trackdb_begin_transaction(void) {
424 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
425 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
429 /* abort transaction */
430 void trackdb_abort_transaction(DB_TXN *tid) {
434 if((err = tid->abort(tid)))
435 fatal(0, "tid->abort: %s", db_strerror(err));
438 /* commit transaction */
439 void trackdb_commit_transaction(DB_TXN *tid) {
442 if((err = tid->commit(tid, 0)))
443 fatal(0, "tid->commit: %s", db_strerror(err));
446 /* search/tags shared code ***************************************************/
448 /* comparison function used by dedupe() */
449 static int wordcmp(const void *a, const void *b) {
450 return strcmp(*(const char **)a, *(const char **)b);
453 /* sort and de-dupe VEC */
454 static char **dedupe(char **vec, int nvec) {
457 qsort(vec, nvec, sizeof (char *), wordcmp);
461 for(n = 1; n < nvec; ++n)
462 if(strcmp(vec[n], vec[m - 1]))
469 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
470 static int register_word(DB *db, const char *what,
471 const char *track, const char *word,
476 switch(err = db->put(db, tid, make_key(&key, word),
477 make_key(&data, track), DB_NODUPDATA)) {
481 case DB_LOCK_DEADLOCK:
482 error(0, "error updating %s.db: %s", what, db_strerror(err));
485 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
489 /* search primitives *********************************************************/
491 /* return true iff NAME is a trackname_display_ pref */
492 static int is_display_pref(const char *name) {
493 static const char prefix[] = "trackname_display_";
494 return !strncmp(name, prefix, (sizeof prefix) - 1);
497 /* compute the words of a track name */
498 static char **track_to_words(const char *track,
499 const struct kvp *p) {
503 const char *rootless = track_rootless(track);
506 rootless = track; /* bodge */
508 if((w = words(casefold(strip_extension(rootless)), &nw)))
509 vector_append_many(&v, w, nw);
511 for(; p; p = p->next)
512 if(is_display_pref(p->name))
513 if((w = words(casefold(p->value), &nw)))
514 vector_append_many(&v, w, nw);
515 vector_terminate(&v);
516 return dedupe(v.vec, v.nvec);
519 /* return nonzero iff WORD is a stopword */
520 static int stopword(const char *word) {
523 for(n = 0; n < config->stopword.n
524 && strcmp(word, config->stopword.s[n]); ++n)
526 return n < config->stopword.n;
529 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
530 static int register_search_word(const char *track, const char *word,
532 if(stopword(word)) return 0;
533 return register_word(trackdb_searchdb, "search", track, word, tid);
536 /* Tags **********************************************************************/
538 /* Return nonzero if C is a valid tag character */
539 static int tagchar(int c) {
548 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
549 static char **parsetags(const char *s) {
555 /* skip initial separators */
556 while(*s && (!tagchar(*s) || *s == ' '))
559 /* find the extent of the tag */
561 while(*s && tagchar(*s))
563 /* strip trailing spaces */
564 while(s > t && s[-1] == ' ')
566 vector_append(&v, xstrndup(t, s - t));
567 /* skip intermediate and trailing separators */
568 while(*s && (!tagchar(*s) || *s == ' '))
572 vector_terminate(&v);
573 return dedupe(v.vec, v.nvec);
576 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
577 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
578 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
581 /* aliases *******************************************************************/
583 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
584 * there is no alias sets *aliasp to 0. */
585 static int compute_alias(char **aliasp,
590 const char *s = config->alias, *t, *expansion, *part;
591 int c, used_db = 0, slash_prefix, err;
593 const char *const root = find_track_root(track);
596 /* Bodge for tracks with no root */
601 dynstr_append_string(&d, root);
602 while((c = (unsigned char)*s++)) {
604 dynstr_append(&d, c);
607 if((slash_prefix = (*s == '/')))
610 assert(t != 0); /* validated at startup */
611 part = xstrndup(s, t - s);
612 expansion = getpart(track, "display", part, p, &used_db);
614 if(slash_prefix) dynstr_append(&d, '/');
615 dynstr_append_string(&d, expansion);
617 s = t + 1; /* skip {part} */
619 /* only admit to the alias if we used the db... */
624 dynstr_terminate(&d);
625 /* ...and the answer differs from the original... */
626 if(!strcmp(track, d.vec)) {
630 /* ...and there isn't already a different track with that name (including as
632 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
634 if((s = kvp_get(at, "_alias_for"))
635 && !strcmp(s, track)) {
647 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
648 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
649 * Always sets the return values, even if only to null pointers. */
650 static int gettrackdata(const char *track,
653 const char **actualp,
655 #define GTD_NOALIAS 0x0001
658 const char *actual = track;
659 struct kvp *t = 0, *p = 0;
661 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
662 if((actual = kvp_get(t, "_alias_for"))) {
663 if(flags & GTD_NOALIAS) {
664 error(0, "alias passed to gettrackdata where real path required");
667 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
672 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
677 if(actualp) *actualp = actual;
683 /* trackdb_notice() **********************************************************/
685 /** @brief notice a possiby new track
686 * @return @c DB_NOTFOUND if new, 0 if already known
688 int trackdb_notice(const char *track,
694 tid = trackdb_begin_transaction();
695 err = trackdb_notice_tid(track, path, tid);
696 if((err == DB_LOCK_DEADLOCK)) goto fail;
699 trackdb_abort_transaction(tid);
701 trackdb_commit_transaction(tid);
705 /** @brief notice a possiby new track
706 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
708 int trackdb_notice_tid(const char *track,
712 struct kvp *t, *a, *p;
716 /* notice whether the tracks.db entry changes */
718 /* get any existing tracks entry */
719 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
721 ret = err; /* 0 or DB_NOTFOUND */
722 /* this is a real track */
723 t_changed += kvp_set(&t, "_alias_for", 0);
724 t_changed += kvp_set(&t, "_path", path);
725 /* if we have an alias record it in the database */
726 if((err = compute_alias(&alias, track, p, tid))) return err;
728 /* won't overwrite someone else's alias as compute_alias() checks */
729 D(("%s: alias %s", track, alias));
731 kvp_set(&a, "_alias_for", track);
732 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
734 /* update search.db */
735 w = track_to_words(track, p);
736 for(n = 0; w[n]; ++n)
737 if((err = register_search_word(track, w[n], tid)))
740 w = parsetags(kvp_get(p, "tags"));
741 for(n = 0; w[n]; ++n)
742 if((err = register_tag(track, w[n], tid)))
745 /* only store the tracks.db entry if it has changed */
746 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
748 if(ret == DB_NOTFOUND) {
749 uint32_t timestamp[2];
754 timestamp[0] = htonl((uint64_t)now >> 32);
755 timestamp[1] = htonl((uint32_t)now);
756 memset(&key, 0, sizeof key);
757 key.data = timestamp;
758 key.size = sizeof timestamp;
759 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
760 make_key(&data, track), 0)) {
762 case DB_LOCK_DEADLOCK: return err;
763 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
769 /* trackdb_obsolete() ********************************************************/
771 /* obsolete a track */
772 int trackdb_obsolete(const char *track, DB_TXN *tid) {
777 if((err = gettrackdata(track, 0, &p, 0,
778 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
780 else if(err == DB_NOTFOUND) return 0;
781 /* compute the alias, if any, and delete it */
782 if(compute_alias(&alias, track, p, tid)) return err;
784 /* if the alias points to some other track then compute_alias won't
786 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
789 /* update search.db */
790 w = track_to_words(track, p);
791 for(n = 0; w[n]; ++n)
792 if(trackdb_delkeydata(trackdb_searchdb,
793 w[n], track, tid) == DB_LOCK_DEADLOCK)
796 w = parsetags(kvp_get(p, "tags"));
797 for(n = 0; w[n]; ++n)
798 if(trackdb_delkeydata(trackdb_tagsdb,
799 w[n], track, tid) == DB_LOCK_DEADLOCK)
802 /* update tracks.db */
803 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
805 /* We don't delete the prefs, so they survive temporary outages of the
806 * (possibly virtual) track filesystem */
810 /* trackdb_stats() ***********************************************************/
812 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
813 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
815 static const struct statinfo {
818 } statinfo_hash[] = {
834 }, statinfo_btree[] = {
855 /* look up stats for DB */
856 static int get_stats(struct vector *v,
858 const struct statinfo *si,
867 switch(err = database->stat(database, tid, &sp, 0)) {
870 case DB_LOCK_DEADLOCK:
871 error(0, "error querying database: %s", db_strerror(err));
874 fatal(0, "error querying database: %s", db_strerror(err));
876 for(n = 0; n < nsi; ++n) {
877 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
878 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
879 vector_append(v, str);
885 struct search_entry {
890 /* find the top COUNT words in the search database */
891 static int search_league(struct vector *v, int count, DB_TXN *tid) {
892 struct search_entry *se;
895 int err, n = 0, nse = 0, i;
900 cursor = trackdb_opencursor(trackdb_searchdb, tid);
901 se = xmalloc(count * sizeof *se);
902 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
904 if(word && wl == k.size && !strncmp(word, k.data, wl))
907 #define FINALIZE() do { \
908 if(word && (nse < count || n > se[nse - 1].n)) { \
913 while(i > 0 && n > se[i - 1].n) \
915 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
921 word = xstrndup(k.data, wl = k.size);
929 case DB_LOCK_DEADLOCK:
930 error(0, "error querying search database: %s", db_strerror(err));
933 fatal(0, "error querying search database: %s", db_strerror(err));
935 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
938 byte_xasprintf(&str, "Top %d search words:", nse);
939 vector_append(v, str);
940 for(i = 0; i < nse; ++i) {
941 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
942 vector_append(v, str);
947 #define SI(what) statinfo_##what, \
948 sizeof statinfo_##what / sizeof (struct statinfo)
950 /* return a list of database stats */
951 char **trackdb_stats(int *nstatsp) {
958 tid = trackdb_begin_transaction();
960 vector_append(&v, (char *)"Tracks database stats:");
961 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
962 vector_append(&v, (char *)"");
963 vector_append(&v, (char *)"Search database stats:");
964 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
965 vector_append(&v, (char *)"");
966 vector_append(&v, (char *)"Prefs database stats:");
967 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
968 vector_append(&v, (char *)"");
969 if(search_league(&v, 10, tid)) goto fail;
970 vector_append(&v, (char *)"");
971 vector_append(&v, (char *)"Server stats:");
972 byte_xasprintf(&s, "track lookup cache hits: %lu", cache_files_hits);
973 vector_append(&v, (char *)s);
974 byte_xasprintf(&s, "track lookup cache misses: %lu", cache_files_misses);
975 vector_append(&v, (char *)s);
976 vector_terminate(&v);
979 trackdb_abort_transaction(tid);
981 trackdb_commit_transaction(tid);
982 if(nstatsp) *nstatsp = v.nvec;
986 /* set a pref (remove if value=0) */
987 int trackdb_set(const char *track,
990 struct kvp *t, *p, *a;
993 char *oldalias, *newalias, **oldtags = 0, **newtags;
996 /* TODO: if value matches default then set value=0 */
1000 tid = trackdb_begin_transaction();
1001 if((err = gettrackdata(track, &t, &p, 0,
1002 0, tid)) == DB_LOCK_DEADLOCK)
1004 if(err == DB_NOTFOUND) break;
1005 if(name[0] == '_') {
1006 if(kvp_set(&t, name, value))
1007 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1010 /* get the old alias name */
1011 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1012 /* get the old tags */
1013 if(!strcmp(name, "tags"))
1014 oldtags = parsetags(kvp_get(p, "tags"));
1016 if(kvp_set(&p, name, value))
1017 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1019 /* compute the new alias name */
1020 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1021 /* check whether alias has changed */
1022 if(!(oldalias == newalias
1023 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1024 /* adjust alias records to fit change */
1026 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1029 kvp_set(&a, "_alias_for", track);
1030 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1033 /* check whether tags have changed */
1034 if(!strcmp(name, "tags")) {
1035 newtags = parsetags(value);
1036 while(*oldtags || *newtags) {
1037 if(*oldtags && *newtags) {
1038 cmp = strcmp(*oldtags, *newtags);
1040 /* keeping this tag */
1044 /* old tag fits into a gap in the new list, so delete old */
1047 /* new tag fits into a gap in the old list, so insert new */
1049 } else if(*oldtags) {
1050 /* we've run out of new tags, so remaining old ones are to be
1053 if(trackdb_delkeydata(trackdb_tagsdb,
1054 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1058 /* we've run out of old tags, so remainig new ones are to be
1061 if(register_tag(track, *newtags, tid)) goto fail;
1071 trackdb_abort_transaction(tid);
1073 trackdb_commit_transaction(tid);
1074 return err == 0 ? 0 : -1;
1078 const char *trackdb_get(const char *track,
1080 return kvp_get(trackdb_get_all(track), name);
1083 /* get all prefs as a 0-terminated array */
1084 struct kvp *trackdb_get_all(const char *track) {
1085 struct kvp *t, *p, **pp;
1089 tid = trackdb_begin_transaction();
1090 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1094 trackdb_abort_transaction(tid);
1096 trackdb_commit_transaction(tid);
1097 for(pp = &p; *pp; pp = &(*pp)->next)
1104 const char *trackdb_resolve(const char *track) {
1109 tid = trackdb_begin_transaction();
1110 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1114 trackdb_abort_transaction(tid);
1116 trackdb_commit_transaction(tid);
1120 int trackdb_isalias(const char *track) {
1121 const char *actual = trackdb_resolve(track);
1123 return strcmp(actual, track);
1126 /* test whether a track exists (perhaps an alias) */
1127 int trackdb_exists(const char *track) {
1132 tid = trackdb_begin_transaction();
1133 /* unusually, here we want the return value */
1134 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1138 trackdb_abort_transaction(tid);
1140 trackdb_commit_transaction(tid);
1144 /* return the list of tags */
1145 char **trackdb_alltags(void) {
1151 tid = trackdb_begin_transaction();
1152 err = trackdb_alltags_tid(tid, &taglist);
1154 trackdb_abort_transaction(tid);
1156 trackdb_commit_transaction(tid);
1160 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1167 c = trackdb_opencursor(trackdb_tagsdb, tid);
1168 memset(&k, 0, sizeof k);
1169 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1170 vector_append(&v, xstrndup(k.data, k.size));
1174 case DB_LOCK_DEADLOCK:
1177 fatal(0, "c->c_get: %s", db_strerror(err));
1179 if((err = trackdb_closecursor(c))) return err;
1180 vector_terminate(&v);
1185 /* return 1 iff sorted tag lists A and B have at least one member in common */
1186 static int tag_intersection(char **a, char **b) {
1189 /* Same sort of logic as trackdb_set() above */
1191 if(!(cmp = strcmp(*a, *b))) return 1;
1192 else if(cmp < 0) ++a;
1198 /* Check whether a track is suitable for random play. Returns 0 if it is,
1199 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1201 static int check_suitable(const char *track,
1203 char **required_tags,
1204 char **prohibited_tags) {
1208 const char *pick_at_random, *played_time;
1210 /* don't pick tracks that aren't in any surviving collection (for instance
1211 * you've edited the config but the rescan hasn't done its job yet) */
1212 if(!find_track_root(track)) {
1213 info("found track not in any collection: %s", track);
1216 /* don't pick aliases - only pick the canonical form */
1217 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1218 return DB_LOCK_DEADLOCK;
1219 if(kvp_get(t, "_alias_for"))
1221 /* check that random play is not suppressed for this track */
1222 if((pick_at_random = kvp_get(p, "pick_at_random"))
1223 && !strcmp(pick_at_random, "0"))
1225 /* don't pick a track that's been played in the last 8 hours */
1226 if((played_time = kvp_get(p, "played_time"))) {
1227 last = atoll(played_time);
1229 if(now < last + 8 * 3600) /* TODO configurable */
1232 track_tags = parsetags(kvp_get(p, "tags"));
1233 /* check that no prohibited tag is present for this track */
1234 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1236 /* check that at least one required tags is present for this track */
1237 if(*required_tags && !tag_intersection(track_tags, required_tags))
1242 /* attempt to pick a random non-alias track */
1243 const char *trackdb_random(int tries) {
1248 const char *track, *candidate;
1251 char **required_tags, **prohibited_tags, **tp;
1256 tid = trackdb_begin_transaction();
1257 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1259 required_tags = parsetags(tags);
1260 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1262 prohibited_tags = parsetags(tags);
1264 if(*required_tags) {
1265 /* Bung all the suitable tracks into a hash and convert to a list of keys
1266 * (to eliminate duplicates). We cache this list since it is possible
1267 * that it will be very large. */
1270 for(tp = required_tags; *tp; ++tp) {
1271 c = trackdb_opencursor(trackdb_tagsdb, tid);
1272 memset(&key, 0, sizeof key);
1274 key.size = strlen(*tp);
1276 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1278 hash_add(h, xstrndup(data.data, data.size), 0,
1279 HASH_INSERT_OR_REPLACE);
1281 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1287 case DB_LOCK_DEADLOCK:
1290 fatal(0, "error querying tags.db: %s", db_strerror(err));
1292 trackdb_closecursor(c);
1295 error(0, "required tag %s does not match any tracks", *tp);
1297 nreqtracks = hash_count(h);
1298 reqtracks = hash_keys(h);
1300 while(nreqtracks && !track && tries-- > 0) {
1301 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1302 candidate = reqtracks[r];
1303 switch(check_suitable(candidate, tid,
1304 required_tags, prohibited_tags)) {
1310 case DB_LOCK_DEADLOCK:
1315 /* No required tags. We pick random record numbers in the database
1317 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1320 case DB_LOCK_DEADLOCK:
1321 error(0, "error querying tracks.db: %s", db_strerror(err));
1324 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1327 error(0, "cannot pick tracks at random from an empty database");
1328 while(sp->bt_nkeys && !track && tries-- > 0) {
1329 /* record numbers count from 1 upwards */
1330 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1331 memset(&key, sizeof key, 0);
1332 key.flags = DB_DBT_MALLOC;
1333 key.size = sizeof r;
1335 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1339 case DB_LOCK_DEADLOCK:
1340 error(0, "error querying tracks.db: %s", db_strerror(err));
1343 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1345 candidate = xstrndup(key.data, key.size);
1346 switch(check_suitable(candidate, tid,
1347 required_tags, prohibited_tags)) {
1353 case DB_LOCK_DEADLOCK:
1360 trackdb_closecursor(c);
1362 trackdb_abort_transaction(tid);
1364 trackdb_commit_transaction(tid);
1366 error(0, "could not pick a random track");
1370 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1371 * from the prefs. */
1372 static const char *getpart(const char *track,
1373 const char *context,
1375 const struct kvp *p,
1380 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1381 if((result = kvp_get(p, pref)))
1384 result = trackname_part(track, context, part);
1385 assert(result != 0);
1389 /* get a track name part, like trackname_part(), but taking the database into
1391 const char *trackdb_getpart(const char *track,
1392 const char *context,
1400 /* construct the full pref */
1401 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1403 tid = trackdb_begin_transaction();
1404 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1408 trackdb_abort_transaction(tid);
1410 trackdb_commit_transaction(tid);
1411 return getpart(actual, context, part, p, &used_db);
1414 /* get the raw path name for @track@ (might be an alias) */
1415 const char *trackdb_rawpath(const char *track) {
1421 tid = trackdb_begin_transaction();
1422 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1426 trackdb_abort_transaction(tid);
1428 trackdb_commit_transaction(tid);
1429 if(!(path = kvp_get(t, "_path"))) path = track;
1433 /* trackdb_list **************************************************************/
1435 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1436 * readable at some point */
1438 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1439 * If RE is a null pointer then it matches everything. */
1440 static int track_matches(size_t dl, const char *track, size_t tl,
1448 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1449 case PCRE_ERROR_NOMATCH: return 0;
1452 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1459 static int do_list(struct vector *v, const char *dir,
1460 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1466 size_t l, last_dir_len = 0;
1467 char *last_dir = 0, *track, *alias;
1471 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1474 /* find the first key >= dir */
1475 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1476 /* keep going while we're dealing with <dir/anything> */
1479 && ((char *)k.data)[dl] == '/'
1480 && !memcmp(k.data, dir, dl)) {
1481 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1483 /* we have <dir/component/anything>, so <dir/component> is a directory */
1484 l = ptr - (char *)k.data;
1485 if(what & trackdb_directories)
1487 && l == last_dir_len
1488 && !memcmp(last_dir, k.data, l))) {
1489 last_dir = xstrndup(k.data, last_dir_len = l);
1490 if(track_matches(dl, k.data, l, re))
1491 vector_append(v, last_dir);
1494 /* found a plain file */
1495 if((what & trackdb_files)) {
1496 track = xstrndup(k.data, k.size);
1497 if((err = trackdb_getdata(trackdb_prefsdb,
1498 track, &p, tid)) == DB_LOCK_DEADLOCK)
1500 /* if this file has an alias in the same directory then we skip it */
1501 if((err = compute_alias(&alias, track, p, tid)))
1503 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1504 if(track_matches(dl, k.data, k.size, re))
1505 vector_append(v, track);
1508 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1516 case DB_LOCK_DEADLOCK:
1517 error(0, "error querying database: %s", db_strerror(err));
1520 fatal(0, "error querying database: %s", db_strerror(err));
1523 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1527 /* return the directories or files below @dir@ */
1528 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1536 tid = trackdb_begin_transaction();
1539 if(do_list(&v, dir, what, re, tid))
1542 for(n = 0; n < config->collection.n; ++n)
1543 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1548 trackdb_abort_transaction(tid);
1550 trackdb_commit_transaction(tid);
1551 vector_terminate(&v);
1557 /* If S is tag:something, return something. Else return 0. */
1558 static const char *checktag(const char *s) {
1559 if(!strncmp(s, "tag:", 4))
1565 /* return a list of tracks containing all of the words given. If you
1566 * ask for only stopwords you get no tracks. */
1567 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1568 const char **w, *best = 0, *tag;
1569 char **twords, **tags;
1570 int i, j, n, err, what;
1580 *ntracks = 0; /* for early returns */
1581 /* casefold all the words */
1582 w = xmalloc(nwordlist * sizeof (char *));
1583 for(n = 0; n < nwordlist; ++n) {
1584 w[n] = casefold(wordlist[n]);
1585 if(checktag(w[n])) ++ntags; /* count up tags */
1587 /* find the longest non-stopword */
1588 for(n = 0; n < nwordlist; ++n)
1589 if(!stopword(w[n]) && !checktag(w[n]))
1590 if(!best || strlen(w[n]) > strlen(best))
1592 /* TODO: we should at least in principal be able to identify the word or tag
1593 * with the least matches in log time, and choose that as our primary search
1595 if(ntags && !best) {
1596 /* Only tags are listed. We limit to the first and narrow down with the
1598 best = checktag(w[0]);
1599 db = trackdb_tagsdb;
1602 /* We can limit to some word. */
1603 db = trackdb_searchdb;
1606 /* Only stopwords */
1612 tid = trackdb_begin_transaction();
1613 /* find all the tracks that have that word */
1618 cursor = trackdb_opencursor(db, tid);
1619 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1620 vector_append(&v, xstrndup(d.data, d.size));
1627 case DB_LOCK_DEADLOCK:
1628 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1631 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1633 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1635 /* do a naive search over that (hopefuly fairly small) list of tracks */
1637 for(n = 0; n < v.nvec; ++n) {
1638 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1641 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1644 twords = track_to_words(v.vec[n], p);
1645 tags = parsetags(kvp_get(p, "tags"));
1646 for(i = 0; i < nwordlist; ++i) {
1647 if((tag = checktag(w[i]))) {
1648 /* Track must have this tag */
1649 for(j = 0; tags[j]; ++j)
1650 if(!strcmp(tag, tags[j])) break; /* tag found */
1651 if(!tags[j]) break; /* tag not found */
1653 /* Track must contain this word */
1654 for(j = 0; twords[j]; ++j)
1655 if(!strcmp(w[i], twords[j])) break; /* word found */
1656 if(!twords[j]) break; /* word not found */
1659 if(i >= nwordlist) /* all words found */
1660 vector_append(&u, v.vec[n]);
1664 trackdb_closecursor(cursor);
1666 trackdb_abort_transaction(tid);
1667 info("retrying search");
1669 trackdb_commit_transaction(tid);
1670 vector_terminate(&u);
1676 /* trackdb_scan **************************************************************/
1678 int trackdb_scan(const char *root,
1679 int (*callback)(const char *track,
1687 const size_t root_len = root ? strlen(root) : 0;
1692 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1694 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1697 memset(&k, 0, sizeof k);
1698 err = cursor->c_get(cursor, &k, prepare_data(&d),
1703 || (k.size > root_len
1704 && !strncmp(k.data, root, root_len)
1705 && ((char *)k.data)[root_len] == '/')) {
1706 data = kvp_urldecode(d.data, d.size);
1707 if(kvp_get(data, "_path")) {
1708 track = xstrndup(k.data, k.size);
1709 /* Advance to the next track before the callback so that the callback
1710 * may safely delete the track */
1711 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1712 if((cberr = callback(track, data, u, tid))) {
1717 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1721 trackdb_closecursor(cursor);
1728 case DB_LOCK_DEADLOCK:
1729 error(0, "c->c_get: %s", db_strerror(err));
1732 fatal(0, "c->c_get: %s", db_strerror(err));
1736 /* trackdb_rescan ************************************************************/
1738 /* called when the rescanner terminates */
1739 static int reap_rescan(ev_source attribute((unused)) *ev,
1742 const struct rusage attribute((unused)) *rusage,
1743 void attribute((unused)) *u) {
1744 if(pid == rescan_pid) rescan_pid = -1;
1746 error(0, "disorderd-rescan: %s", wstat(status));
1748 D(("disorderd-rescan terminate: %s", wstat(status)));
1749 /* Our cache of file lookups is out of date now */
1750 cache_clean(&cache_files_type);
1751 eventlog("rescanned", (char *)0);
1755 void trackdb_rescan(ev_source *ev) {
1756 if(rescan_pid != -1) {
1757 error(0, "rescan already underway");
1760 rescan_pid = subprogram(ev, RESCAN);
1761 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1762 D(("started rescanner"));
1766 int trackdb_rescan_cancel(void) {
1767 if(rescan_pid == -1) return 0;
1768 if(kill(rescan_pid, SIGTERM) < 0)
1769 fatal(errno, "error killing rescanner");
1774 /* global prefs **************************************************************/
1776 void trackdb_set_global(const char *name,
1784 memset(&k, 0, sizeof k);
1785 memset(&d, 0, sizeof d);
1786 k.data = (void *)name;
1787 k.size = strlen(name);
1789 d.data = (void *)value;
1790 d.size = strlen(value);
1793 tid = trackdb_begin_transaction();
1795 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
1797 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
1798 if(!err || err == DB_NOTFOUND) break;
1799 if(err != DB_LOCK_DEADLOCK)
1800 fatal(0, "error updating database: %s", db_strerror(err));
1801 trackdb_abort_transaction(tid);
1803 trackdb_commit_transaction(tid);
1804 /* log important state changes */
1805 if(!strcmp(name, "playing")) {
1806 state = !value || !strcmp(value, "yes");
1807 info("playing %s by %s",
1808 state ? "enabled" : "disabled",
1810 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
1812 if(!strcmp(name, "random-play")) {
1813 state = !value || !strcmp(value, "yes");
1814 info("random play %s by %s",
1815 state ? "enabled" : "disabled",
1817 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
1819 if(!strcmp(name, "required-tags"))
1823 const char *trackdb_get_global(const char *name) {
1829 tid = trackdb_begin_transaction();
1830 if(!(err = trackdb_get_global_tid(name, tid, &r)))
1832 trackdb_abort_transaction(tid);
1834 trackdb_commit_transaction(tid);
1838 static int trackdb_get_global_tid(const char *name,
1844 memset(&k, 0, sizeof k);
1845 k.data = (void *)name;
1846 k.size = strlen(name);
1847 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
1848 prepare_data(&d), 0)) {
1850 *rp = xstrndup(d.data, d.size);
1855 case DB_LOCK_DEADLOCK:
1858 fatal(0, "error updating database: %s", db_strerror(err));
1862 /** @brief Retrieve the most recently added tracks
1863 * @param ntracksp Where to put count, or 0
1864 * @param maxtracks Maximum number of tracks to retrieve
1865 * @return null-terminated array of track names
1867 * The most recently added track is first in the array.
1869 char **trackdb_new(int *ntracksp,
1875 tid = trackdb_begin_transaction();
1876 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
1879 trackdb_abort_transaction(tid);
1881 trackdb_commit_transaction(tid);
1885 /** @brief Retrieve the most recently added tracks
1886 * @param ntracksp Where to put count, or 0
1887 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
1888 * @param tid Transaction ID
1889 * @return null-terminated array of track names, or NULL on deadlock
1891 * The most recently added track is first in the array.
1893 static char **trackdb_new_tid(int *ntracksp,
1899 struct vector tracks[1];
1901 vector_init(tracks);
1902 c = trackdb_opencursor(trackdb_noticeddb, tid);
1903 while((maxtracks <= 0 || tracks->nvec < maxtracks)
1904 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
1905 vector_append(tracks, xstrndup(d.data, d.size));
1907 case 0: /* hit maxtracks */
1908 case DB_NOTFOUND: /* ran out of tracks */
1910 case DB_LOCK_DEADLOCK:
1911 trackdb_closecursor(c);
1914 fatal(0, "error reading noticed.db: %s", db_strerror(err));
1916 if((err = trackdb_closecursor(c)))
1917 return 0; /* deadlock */
1918 vector_terminate(tracks);
1920 *ntracksp = tracks->nvec;
1924 /* tidying up ****************************************************************/
1926 void trackdb_gc(void) {
1930 if((err = trackdb_env->txn_checkpoint(trackdb_env,
1931 config->checkpoint_kbyte,
1932 config->checkpoint_min,
1934 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
1935 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
1936 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
1937 /* This makes catastrophic recovery impossible. However, the user can still
1938 * preserve the important data by using disorder-dump to snapshot their
1939 * prefs, and later to restore it. This is likely to have much small
1940 * long-term storage requirements than record the db logfiles. */
1948 indent-tabs-mode:nil