Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
4363757e | 3 | * Copyright (C) 2005-2008 Richard Kettlewell |
460b9539 | 4 | * |
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. | |
9 | * | |
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. | |
14 | * | |
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 | |
18 | * USA | |
19 | */ | |
158d0961 | 20 | /** @file lib/trackdb.c |
f0feb22e RK |
21 | * @brief Track database |
22 | * | |
23 | * This file is getting in desparate need of splitting up... | |
24 | */ | |
460b9539 | 25 | |
05b75f8d | 26 | #include "common.h" |
460b9539 | 27 | |
460b9539 | 28 | #include <db.h> |
29 | #include <sys/socket.h> | |
30 | #include <pcre.h> | |
460b9539 | 31 | #include <unistd.h> |
32 | #include <errno.h> | |
33 | #include <stddef.h> | |
34 | #include <sys/time.h> | |
35 | #include <sys/resource.h> | |
36 | #include <time.h> | |
2a10b70b | 37 | #include <arpa/inet.h> |
a745dd43 RK |
38 | #include <dirent.h> |
39 | #include <sys/stat.h> | |
f0feb22e | 40 | #include <gcrypt.h> |
460b9539 | 41 | |
42 | #include "event.h" | |
43 | #include "mem.h" | |
44 | #include "kvp.h" | |
45 | #include "log.h" | |
46 | #include "vector.h" | |
5df73aeb | 47 | #include "rights.h" |
460b9539 | 48 | #include "trackdb.h" |
49 | #include "configuration.h" | |
50 | #include "syscalls.h" | |
51 | #include "wstat.h" | |
460b9539 | 52 | #include "printf.h" |
53 | #include "filepart.h" | |
54 | #include "trackname.h" | |
55 | #include "trackdb-int.h" | |
56 | #include "logfd.h" | |
57 | #include "cache.h" | |
58 | #include "eventlog.h" | |
59 | #include "hash.h" | |
c85b7022 RK |
60 | #include "unicode.h" |
61 | #include "unidata.h" | |
fce810c2 | 62 | #include "base64.h" |
460b9539 | 63 | |
64 | #define RESCAN "disorder-rescan" | |
65 | #define DEADLOCK "disorder-deadlock" | |
66 | ||
67 | static const char *getpart(const char *track, | |
68 | const char *context, | |
69 | const char *part, | |
70 | const struct kvp *p, | |
71 | int *used_db); | |
2a10b70b RK |
72 | static char **trackdb_new_tid(int *ntracksp, |
73 | int maxtracks, | |
74 | DB_TXN *tid); | |
1e64e9fb | 75 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid); |
a3777123 | 76 | static char *normalize_tag(const char *s, size_t ns); |
460b9539 | 77 | |
78 | const struct cache_type cache_files_type = { 86400 }; | |
79 | unsigned long cache_files_hits, cache_files_misses; | |
80 | ||
f982b120 RK |
81 | /** @brief Set by trackdb_open() */ |
82 | int trackdb_existing_database; | |
83 | ||
460b9539 | 84 | /* setup and teardown ********************************************************/ |
85 | ||
86 | static const char *home; /* home had better not change */ | |
87 | DB_ENV *trackdb_env; /* db environment */ | |
f9635e06 RK |
88 | |
89 | /** @brief The tracks database | |
90 | * - Keys are UTF-8(NFC(unicode(path name))) | |
91 | * - Values are encoded key-value pairs | |
92 | * - Data is reconstructable data about tracks that currently exist | |
93 | */ | |
94 | DB *trackdb_tracksdb; | |
95 | ||
96 | /** @brief The preferences database | |
97 | * | |
98 | * - Keys are UTF-8(NFC(unicode(path name))) | |
99 | * - Values are encoded key-value pairs | |
100 | * - Data is user data about tracks (that might not exist any more) | |
101 | * and cannot be reconstructed | |
102 | */ | |
103 | DB *trackdb_prefsdb; | |
104 | ||
105 | /** @brief The search database | |
106 | * | |
107 | * - Keys are UTF-8(NFKC(casefold(search term))) | |
108 | * - Values are UTF-8(NFC(unicode(path name))) | |
109 | * - There can be more than one value per key | |
110 | * - Presence of key,value means that path matches the search terms | |
158d0961 | 111 | * - Only tracks fond in @ref trackdb_tracksdb are represented here |
f9635e06 RK |
112 | * - This database can be reconstructed, it contains no user data |
113 | */ | |
114 | DB *trackdb_searchdb; | |
115 | ||
116 | /** @brief The tags database | |
117 | * | |
118 | * - Keys are UTF-8(NFKC(casefold(tag))) | |
119 | * - Values are UTF-8(NFC(unicode(path name))) | |
120 | * - There can be more than one value per key | |
121 | * - Presence of key,value means that path matches the tag | |
122 | * - This is always in sync with the tags preference | |
123 | * - This database can be reconstructed, it contains no user data | |
124 | */ | |
460b9539 | 125 | DB *trackdb_tagsdb; /* the tags database */ |
f9635e06 RK |
126 | |
127 | /** @brief The global preferences database | |
128 | * - Keys are UTF-8(NFC(preference)) | |
129 | * - Values are global preference values | |
130 | * - Data is user data and cannot be reconstructed | |
131 | */ | |
460b9539 | 132 | DB *trackdb_globaldb; /* global preferences */ |
f9635e06 RK |
133 | |
134 | /** @brief The noticed database | |
135 | * - Keys are 64-bit big-endian timestamps | |
136 | * - Values are UTF-8(NFC(unicode(path name))) | |
137 | * - There can be more than one value per key | |
138 | * - Presence of key,value means that path was added at the given time | |
139 | * - Data cannot be reconstructed (but isn't THAT important) | |
140 | */ | |
2a10b70b | 141 | DB *trackdb_noticeddb; /* when track noticed */ |
a745dd43 | 142 | |
fdca70ee RK |
143 | /** @brief The schedule database |
144 | * | |
145 | * - Keys are ID strings, generated at random | |
146 | * - Values are encoded key-value pairs | |
147 | * - There can be more than one value per key | |
148 | * - Data cannot be reconstructed | |
149 | * | |
150 | * See @ref server/schedule.c for further information. | |
151 | */ | |
152 | DB *trackdb_scheduledb; | |
153 | ||
a745dd43 RK |
154 | /** @brief The user database |
155 | * - Keys are usernames | |
156 | * - Values are encoded key-value pairs | |
157 | * - Data is user data and cannot be reconstructed | |
158 | */ | |
159 | DB *trackdb_usersdb; | |
160 | ||
460b9539 | 161 | static pid_t db_deadlock_pid = -1; /* deadlock manager PID */ |
162 | static pid_t rescan_pid = -1; /* rescanner PID */ | |
163 | static int initialized, opened; /* state */ | |
164 | ||
460b9539 | 165 | /* comparison function for keys */ |
166 | static int compare(DB attribute((unused)) *db_, | |
167 | const DBT *a, const DBT *b) { | |
168 | return compare_path_raw(a->data, a->size, b->data, b->size); | |
169 | } | |
170 | ||
199c2a23 RK |
171 | /** @brief Test whether the track database can be read |
172 | * @return 1 if it can, 0 if it cannot | |
173 | */ | |
174 | int trackdb_readable(void) { | |
175 | char *usersdb; | |
176 | ||
177 | byte_xasprintf(&usersdb, "%s/users.db", config->home); | |
178 | return access(usersdb, R_OK) == 0; | |
179 | } | |
180 | ||
d25c4615 RK |
181 | /** @brief Open database environment |
182 | * @param flags Flags word | |
183 | * | |
184 | * Flags should be one of: | |
185 | * - @ref TRACKDB_NO_RECOVER | |
186 | * - @ref TRACKDB_NORMAL_RECOVER | |
187 | * - @ref TRACKDB_FATAL_RECOVER | |
a745dd43 | 188 | * - @ref TRACKDB_MAY_CREATE |
d25c4615 RK |
189 | */ |
190 | void trackdb_init(int flags) { | |
460b9539 | 191 | int err; |
d25c4615 | 192 | const int recover = flags & TRACKDB_RECOVER_MASK; |
460b9539 | 193 | static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL }; |
194 | ||
195 | /* sanity checks */ | |
196 | assert(initialized == 0); | |
197 | ++initialized; | |
198 | if(home) { | |
199 | if(strcmp(home, config->home)) | |
200 | fatal(0, "cannot change db home without server restart"); | |
201 | home = config->home; | |
202 | } | |
203 | ||
a745dd43 RK |
204 | if(flags & TRACKDB_MAY_CREATE) { |
205 | DIR *dp; | |
206 | struct dirent *de; | |
207 | struct stat st; | |
208 | char *p; | |
209 | ||
a745dd43 RK |
210 | /* Remove world/group permissions on any regular files already in the |
211 | * database directory. Actually we don't care about all of them but it's | |
212 | * easier to just do the lot. This can be revisited if it's a serious | |
213 | * practical inconvenience for anyone. | |
214 | * | |
215 | * The socket, not being a regular file, is excepted. | |
216 | */ | |
217 | if(!(dp = opendir(config->home))) | |
218 | fatal(errno, "error reading %s", config->home); | |
219 | while((de = readdir(dp))) { | |
220 | byte_xasprintf(&p, "%s/%s", config->home, de->d_name); | |
221 | if(lstat(p, &st) == 0 | |
222 | && S_ISREG(st.st_mode) | |
223 | && (st.st_mode & 077)) { | |
f0feb22e | 224 | if(chmod(p, st.st_mode & 07700) < 0) |
a745dd43 RK |
225 | fatal(errno, "cannot chmod %s", p); |
226 | } | |
227 | xfree(p); | |
228 | } | |
229 | closedir(dp); | |
230 | } | |
231 | ||
460b9539 | 232 | /* create environment */ |
233 | if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s", | |
234 | db_strerror(err)); | |
235 | if((err = trackdb_env->set_alloc(trackdb_env, | |
236 | xmalloc_noptr, xrealloc_noptr, xfree))) | |
237 | fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err)); | |
238 | if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000))) | |
239 | fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err)); | |
240 | if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000))) | |
241 | fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err)); | |
242 | if((err = trackdb_env->open(trackdb_env, config->home, | |
243 | DB_INIT_LOG | |
244 | |DB_INIT_LOCK | |
245 | |DB_INIT_MPOOL | |
246 | |DB_INIT_TXN | |
247 | |DB_CREATE | |
248 | |recover_type[recover], | |
a745dd43 | 249 | 0600))) |
dc450d30 | 250 | fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err)); |
460b9539 | 251 | trackdb_env->set_errpfx(trackdb_env, "DB"); |
252 | trackdb_env->set_errfile(trackdb_env, stderr); | |
253 | trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1); | |
254 | trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1); | |
255 | trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1); | |
256 | D(("initialized database environment")); | |
257 | } | |
258 | ||
259 | /* called when deadlock manager terminates */ | |
260 | static int reap_db_deadlock(ev_source attribute((unused)) *ev, | |
261 | pid_t attribute((unused)) pid, | |
262 | int status, | |
263 | const struct rusage attribute((unused)) *rusage, | |
264 | void attribute((unused)) *u) { | |
265 | db_deadlock_pid = -1; | |
266 | if(initialized) | |
267 | fatal(0, "deadlock manager unexpectedly terminated: %s", | |
268 | wstat(status)); | |
269 | else | |
270 | D(("deadlock manager terminated: %s", wstat(status))); | |
271 | return 0; | |
272 | } | |
273 | ||
ffac51d7 RK |
274 | static pid_t subprogram(ev_source *ev, int outputfd, const char *prog, |
275 | ...) { | |
460b9539 | 276 | pid_t pid; |
ffac51d7 RK |
277 | va_list ap; |
278 | const char *args[1024], **argp, *a; | |
279 | ||
280 | argp = args; | |
281 | *argp++ = prog; | |
282 | *argp++ = "--config"; | |
283 | *argp++ = configfile; | |
284 | *argp++ = debugging ? "--debug" : "--no-debug"; | |
285 | *argp++ = log_default == &log_syslog ? "--syslog" : "--no-syslog"; | |
286 | va_start(ap, prog); | |
287 | while((a = va_arg(ap, const char *))) | |
288 | *argp++ = a; | |
289 | va_end(ap); | |
290 | *argp = 0; | |
460b9539 | 291 | /* If we're in the background then trap subprocess stdout/stderr */ |
460b9539 | 292 | if(!(pid = xfork())) { |
293 | exitfn = _exit; | |
f2218e3c RK |
294 | if(ev) |
295 | ev_signal_atfork(ev); | |
460b9539 | 296 | signal(SIGPIPE, SIG_DFL); |
d6dde5a3 RK |
297 | if(outputfd != -1) { |
298 | xdup2(outputfd, 1); | |
299 | xclose(outputfd); | |
460b9539 | 300 | } |
f0feb22e RK |
301 | /* ensure we don't leak privilege anywhere */ |
302 | if(setuid(geteuid()) < 0) | |
303 | fatal(errno, "error calling setuid"); | |
304 | /* If we were negatively niced, undo it. We don't bother checking for | |
305 | * error, it's not that important. */ | |
460b9539 | 306 | setpriority(PRIO_PROCESS, 0, 0); |
ffac51d7 | 307 | execvp(prog, (char **)args); |
460b9539 | 308 | fatal(errno, "error invoking %s", prog); |
309 | } | |
460b9539 | 310 | return pid; |
311 | } | |
312 | ||
313 | /* start deadlock manager */ | |
314 | void trackdb_master(ev_source *ev) { | |
315 | assert(db_deadlock_pid == -1); | |
ffac51d7 | 316 | db_deadlock_pid = subprogram(ev, -1, DEADLOCK, (char *)0); |
460b9539 | 317 | ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0); |
318 | D(("started deadlock manager")); | |
319 | } | |
320 | ||
321 | /* close environment */ | |
322 | void trackdb_deinit(void) { | |
323 | int err; | |
324 | ||
325 | /* sanity checks */ | |
326 | assert(initialized == 1); | |
327 | --initialized; | |
328 | ||
329 | /* close the environment */ | |
330 | if((err = trackdb_env->close(trackdb_env, 0))) | |
331 | fatal(0, "trackdb_env->close: %s", db_strerror(err)); | |
332 | ||
4363757e RK |
333 | if(rescan_pid != -1) { |
334 | /* shut down the rescanner */ | |
335 | if(kill(rescan_pid, SIGTERM) < 0) | |
336 | fatal(errno, "error killing rescanner"); | |
337 | /* wait for the rescanner to finish */ | |
338 | while(waitpid(rescan_pid, &err, 0) == -1 && errno == EINTR) | |
339 | ; | |
340 | } | |
341 | ||
342 | /* TODO kill any stats subprocesses */ | |
460b9539 | 343 | |
4363757e | 344 | /* finally terminate the deadlock manager */ |
460b9539 | 345 | if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0) |
346 | fatal(errno, "error killing deadlock manager"); | |
347 | db_deadlock_pid = -1; | |
348 | ||
349 | D(("deinitialized database environment")); | |
350 | } | |
351 | ||
352 | /* open a specific database */ | |
353 | static DB *open_db(const char *path, | |
354 | u_int32_t dbflags, | |
355 | DBTYPE dbtype, | |
356 | u_int32_t openflags, | |
357 | int mode) { | |
358 | int err; | |
359 | DB *db; | |
360 | ||
361 | D(("open %s", path)); | |
362 | path = config_get_file(path); | |
363 | if((err = db_create(&db, trackdb_env, 0))) | |
364 | fatal(0, "db_create %s: %s", path, db_strerror(err)); | |
365 | if(dbflags) | |
366 | if((err = db->set_flags(db, dbflags))) | |
367 | fatal(0, "db->set_flags %s: %s", path, db_strerror(err)); | |
368 | if(dbtype == DB_BTREE) | |
369 | if((err = db->set_bt_compare(db, compare))) | |
370 | fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err)); | |
371 | if((err = db->open(db, 0, path, 0, dbtype, | |
f9635e06 RK |
372 | openflags | DB_AUTO_COMMIT, mode))) { |
373 | if((openflags & DB_CREATE) || errno != ENOENT) | |
374 | fatal(0, "db->open %s: %s", path, db_strerror(err)); | |
375 | db->close(db, 0); | |
376 | db = 0; | |
377 | } | |
460b9539 | 378 | return db; |
379 | } | |
380 | ||
3dc3d7db | 381 | /** @brief Open track databases |
158d0961 | 382 | * @param flags Flags flags word |
d25c4615 | 383 | * |
f0feb22e | 384 | * @p flags should have one of: |
d25c4615 RK |
385 | * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted |
386 | * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted | |
387 | * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade | |
f0feb22e RK |
388 | * Also it may have: |
389 | * - @p TRACKDB_READ_ONLY, read only access | |
3dc3d7db | 390 | */ |
d25c4615 | 391 | void trackdb_open(int flags) { |
f982b120 | 392 | int err; |
f2218e3c | 393 | pid_t pid; |
f0feb22e | 394 | uint32_t dbflags = flags & TRACKDB_READ_ONLY ? DB_RDONLY : DB_CREATE; |
f9635e06 | 395 | |
460b9539 | 396 | /* sanity checks */ |
397 | assert(opened == 0); | |
398 | ++opened; | |
f9635e06 | 399 | /* check the database version first */ |
f0feb22e | 400 | trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_RDONLY, 0666); |
f9635e06 RK |
401 | if(trackdb_globaldb) { |
402 | /* This is an existing database */ | |
8818b7fc RK |
403 | const char *s; |
404 | long oldversion; | |
f9635e06 | 405 | |
8818b7fc | 406 | s = trackdb_get_global("_dbversion"); |
d25c4615 RK |
407 | /* Close the database again, we'll open it property below */ |
408 | if((err = trackdb_globaldb->close(trackdb_globaldb, 0))) | |
409 | fatal(0, "error closing global.db: %s", db_strerror(err)); | |
410 | trackdb_globaldb = 0; | |
411 | /* Convert version string to an integer */ | |
8818b7fc | 412 | oldversion = s ? atol(s) : 1; |
3dc3d7db | 413 | if(oldversion > config->dbversion) { |
d25c4615 | 414 | /* Database is from the future; we never allow this. */ |
3dc3d7db RK |
415 | fatal(0, "this version of DisOrder is too old for database version %ld", |
416 | oldversion); | |
417 | } | |
d25c4615 RK |
418 | if(oldversion < config->dbversion) { |
419 | /* Database version is out of date */ | |
420 | switch(flags & TRACKDB_UPGRADE_MASK) { | |
421 | case TRACKDB_NO_UPGRADE: | |
422 | /* This database needs upgrading but this is not permitted */ | |
423 | fatal(0, "database needs upgrading from %ld to %ld", | |
424 | oldversion, config->dbversion); | |
425 | case TRACKDB_CAN_UPGRADE: | |
426 | /* This database needs upgrading */ | |
f2218e3c RK |
427 | info("invoking disorder-dbupgrade to upgrade from %ld to %ld", |
428 | oldversion, config->dbversion); | |
ffac51d7 | 429 | pid = subprogram(0, -1, "disorder-dbupgrade", (char *)0); |
f2218e3c RK |
430 | while(waitpid(pid, &err, 0) == -1 && errno == EINTR) |
431 | ; | |
432 | if(err) | |
433 | fatal(0, "disorder-dbupgrade %s", wstat(err)); | |
434 | info("disorder-dbupgrade succeeded"); | |
435 | break; | |
d25c4615 RK |
436 | case TRACKDB_OPEN_FOR_UPGRADE: |
437 | break; | |
438 | default: | |
439 | abort(); | |
440 | } | |
f9635e06 | 441 | } |
d25c4615 | 442 | if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) { |
3dc3d7db RK |
443 | /* This doesn't make any sense */ |
444 | fatal(0, "database is already at current version"); | |
445 | } | |
f982b120 | 446 | trackdb_existing_database = 1; |
f9635e06 | 447 | } else { |
d25c4615 | 448 | if(flags & TRACKDB_OPEN_FOR_UPGRADE) { |
3dc3d7db RK |
449 | /* Cannot upgrade a new database */ |
450 | fatal(0, "cannot upgrade a database that does not exist"); | |
451 | } | |
f9635e06 | 452 | /* This is a brand new database */ |
f982b120 | 453 | trackdb_existing_database = 0; |
f9635e06 | 454 | } |
460b9539 | 455 | /* open the databases */ |
0934814d RK |
456 | if(!(trackdb_usersdb = open_db("users.db", |
457 | 0, DB_HASH, dbflags, 0600))) | |
458 | fatal(0, "cannot open users.db"); | |
460b9539 | 459 | trackdb_tracksdb = open_db("tracks.db", |
f0feb22e | 460 | DB_RECNUM, DB_BTREE, dbflags, 0666); |
460b9539 | 461 | trackdb_searchdb = open_db("search.db", |
f0feb22e | 462 | DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666); |
460b9539 | 463 | trackdb_tagsdb = open_db("tags.db", |
f0feb22e RK |
464 | DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666); |
465 | trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, dbflags, 0666); | |
466 | trackdb_globaldb = open_db("global.db", 0, DB_HASH, dbflags, 0666); | |
2a10b70b | 467 | trackdb_noticeddb = open_db("noticed.db", |
f0feb22e | 468 | DB_DUPSORT, DB_BTREE, dbflags, 0666); |
fdca70ee | 469 | trackdb_scheduledb = open_db("schedule.db", 0, DB_HASH, dbflags, 0666); |
f982b120 | 470 | if(!trackdb_existing_database) { |
3dc3d7db | 471 | /* Stash the database version */ |
8818b7fc RK |
472 | char buf[32]; |
473 | ||
d25c4615 | 474 | assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE)); |
8818b7fc RK |
475 | snprintf(buf, sizeof buf, "%ld", config->dbversion); |
476 | trackdb_set_global("_dbversion", buf, 0); | |
477 | } | |
460b9539 | 478 | D(("opened databases")); |
479 | } | |
480 | ||
481 | /* close track databases */ | |
482 | void trackdb_close(void) { | |
483 | int err; | |
f0feb22e | 484 | |
460b9539 | 485 | /* sanity checks */ |
486 | assert(opened == 1); | |
487 | --opened; | |
488 | if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0))) | |
489 | fatal(0, "error closing tracks.db: %s", db_strerror(err)); | |
490 | if((err = trackdb_searchdb->close(trackdb_searchdb, 0))) | |
491 | fatal(0, "error closing search.db: %s", db_strerror(err)); | |
492 | if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0))) | |
493 | fatal(0, "error closing tags.db: %s", db_strerror(err)); | |
494 | if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0))) | |
495 | fatal(0, "error closing prefs.db: %s", db_strerror(err)); | |
496 | if((err = trackdb_globaldb->close(trackdb_globaldb, 0))) | |
497 | fatal(0, "error closing global.db: %s", db_strerror(err)); | |
2a10b70b RK |
498 | if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0))) |
499 | fatal(0, "error closing noticed.db: %s", db_strerror(err)); | |
fdca70ee RK |
500 | if((err = trackdb_scheduledb->close(trackdb_scheduledb, 0))) |
501 | fatal(0, "error closing schedule.db: %s", db_strerror(err)); | |
a745dd43 RK |
502 | if((err = trackdb_usersdb->close(trackdb_usersdb, 0))) |
503 | fatal(0, "error closing users.db: %s", db_strerror(err)); | |
460b9539 | 504 | trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0; |
505 | trackdb_tagsdb = trackdb_globaldb = 0; | |
506 | D(("closed databases")); | |
507 | } | |
508 | ||
509 | /* generic db routines *******************************************************/ | |
510 | ||
511 | /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or | |
512 | * DB_LOCK_DEADLOCK. */ | |
513 | int trackdb_getdata(DB *db, | |
514 | const char *track, | |
515 | struct kvp **kp, | |
516 | DB_TXN *tid) { | |
517 | int err; | |
518 | DBT key, data; | |
519 | ||
520 | switch(err = db->get(db, tid, make_key(&key, track), | |
521 | prepare_data(&data), 0)) { | |
522 | case 0: | |
523 | *kp = kvp_urldecode(data.data, data.size); | |
524 | return 0; | |
525 | case DB_NOTFOUND: | |
526 | *kp = 0; | |
527 | return err; | |
528 | case DB_LOCK_DEADLOCK: | |
529 | error(0, "error querying database: %s", db_strerror(err)); | |
530 | return err; | |
531 | default: | |
532 | fatal(0, "error querying database: %s", db_strerror(err)); | |
533 | } | |
534 | } | |
535 | ||
536 | /* encode and store a database entry. Returns 0, DB_KEYEXIST or | |
537 | * DB_LOCK_DEADLOCK. */ | |
538 | int trackdb_putdata(DB *db, | |
539 | const char *track, | |
540 | const struct kvp *k, | |
541 | DB_TXN *tid, | |
542 | u_int32_t flags) { | |
543 | int err; | |
544 | DBT key, data; | |
545 | ||
546 | switch(err = db->put(db, tid, make_key(&key, track), | |
547 | encode_data(&data, k), flags)) { | |
548 | case 0: | |
549 | case DB_KEYEXIST: | |
550 | return err; | |
551 | case DB_LOCK_DEADLOCK: | |
552 | error(0, "error updating database: %s", db_strerror(err)); | |
553 | return err; | |
554 | default: | |
555 | fatal(0, "error updating database: %s", db_strerror(err)); | |
556 | } | |
557 | } | |
558 | ||
f0feb22e RK |
559 | /** @brief Delete a database entry |
560 | * @param db Database | |
561 | * @param track Key to delete | |
562 | * @param tid Transaction ID | |
563 | * @return 0, DB_NOTFOUND or DB_LOCK_DEADLOCK | |
564 | */ | |
460b9539 | 565 | int trackdb_delkey(DB *db, |
566 | const char *track, | |
567 | DB_TXN *tid) { | |
568 | int err; | |
569 | ||
570 | DBT key; | |
571 | switch(err = db->del(db, tid, make_key(&key, track), 0)) { | |
572 | case 0: | |
573 | case DB_NOTFOUND: | |
574 | return 0; | |
575 | case DB_LOCK_DEADLOCK: | |
576 | error(0, "error updating database: %s", db_strerror(err)); | |
577 | return err; | |
578 | default: | |
579 | fatal(0, "error updating database: %s", db_strerror(err)); | |
580 | } | |
581 | } | |
582 | ||
583 | /* open a database cursor */ | |
584 | DBC *trackdb_opencursor(DB *db, DB_TXN *tid) { | |
585 | int err; | |
586 | DBC *c; | |
587 | ||
588 | switch(err = db->cursor(db, tid, &c, 0)) { | |
589 | case 0: break; | |
590 | default: fatal(0, "error creating cursor: %s", db_strerror(err)); | |
591 | } | |
592 | return c; | |
593 | } | |
594 | ||
595 | /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */ | |
596 | int trackdb_closecursor(DBC *c) { | |
597 | int err; | |
598 | ||
599 | if(!c) return 0; | |
600 | switch(err = c->c_close(c)) { | |
601 | case 0: | |
602 | return err; | |
603 | case DB_LOCK_DEADLOCK: | |
604 | error(0, "error closing cursor: %s", db_strerror(err)); | |
605 | return err; | |
606 | default: | |
607 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
608 | } | |
609 | } | |
610 | ||
611 | /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */ | |
612 | int trackdb_delkeydata(DB *db, | |
613 | const char *word, | |
614 | const char *track, | |
615 | DB_TXN *tid) { | |
616 | int err; | |
617 | DBC *c; | |
618 | DBT key, data; | |
619 | ||
620 | c = trackdb_opencursor(db, tid); | |
621 | switch(err = c->c_get(c, make_key(&key, word), | |
622 | make_key(&data, track), DB_GET_BOTH)) { | |
623 | case 0: | |
624 | switch(err = c->c_del(c, 0)) { | |
625 | case 0: | |
626 | break; | |
627 | case DB_KEYEMPTY: | |
628 | err = 0; | |
629 | break; | |
630 | case DB_LOCK_DEADLOCK: | |
631 | error(0, "error updating database: %s", db_strerror(err)); | |
632 | break; | |
633 | default: | |
634 | fatal(0, "c->c_del: %s", db_strerror(err)); | |
635 | } | |
636 | break; | |
637 | case DB_NOTFOUND: | |
638 | break; | |
639 | case DB_LOCK_DEADLOCK: | |
640 | error(0, "error updating database: %s", db_strerror(err)); | |
641 | break; | |
642 | default: | |
643 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
644 | } | |
645 | if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK; | |
646 | return err; | |
647 | } | |
648 | ||
649 | /* start a transaction */ | |
650 | DB_TXN *trackdb_begin_transaction(void) { | |
651 | DB_TXN *tid; | |
652 | int err; | |
653 | ||
654 | if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0))) | |
655 | fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err)); | |
656 | return tid; | |
657 | } | |
658 | ||
659 | /* abort transaction */ | |
660 | void trackdb_abort_transaction(DB_TXN *tid) { | |
661 | int err; | |
662 | ||
663 | if(tid) | |
664 | if((err = tid->abort(tid))) | |
665 | fatal(0, "tid->abort: %s", db_strerror(err)); | |
666 | } | |
667 | ||
668 | /* commit transaction */ | |
669 | void trackdb_commit_transaction(DB_TXN *tid) { | |
670 | int err; | |
671 | ||
672 | if((err = tid->commit(tid, 0))) | |
673 | fatal(0, "tid->commit: %s", db_strerror(err)); | |
674 | } | |
675 | ||
676 | /* search/tags shared code ***************************************************/ | |
677 | ||
678 | /* comparison function used by dedupe() */ | |
679 | static int wordcmp(const void *a, const void *b) { | |
680 | return strcmp(*(const char **)a, *(const char **)b); | |
681 | } | |
682 | ||
683 | /* sort and de-dupe VEC */ | |
684 | static char **dedupe(char **vec, int nvec) { | |
685 | int m, n; | |
686 | ||
687 | qsort(vec, nvec, sizeof (char *), wordcmp); | |
688 | m = n = 0; | |
689 | if(nvec) { | |
690 | vec[m++] = vec[0]; | |
691 | for(n = 1; n < nvec; ++n) | |
692 | if(strcmp(vec[n], vec[m - 1])) | |
693 | vec[m++] = vec[n]; | |
694 | } | |
695 | vec[m] = 0; | |
696 | return vec; | |
697 | } | |
698 | ||
699 | /* update a key/track database. Returns 0 or DB_DEADLOCK. */ | |
700 | static int register_word(DB *db, const char *what, | |
701 | const char *track, const char *word, | |
702 | DB_TXN *tid) { | |
703 | int err; | |
704 | DBT key, data; | |
705 | ||
706 | switch(err = db->put(db, tid, make_key(&key, word), | |
707 | make_key(&data, track), DB_NODUPDATA)) { | |
708 | case 0: | |
709 | case DB_KEYEXIST: | |
710 | return 0; | |
711 | case DB_LOCK_DEADLOCK: | |
712 | error(0, "error updating %s.db: %s", what, db_strerror(err)); | |
713 | return err; | |
714 | default: | |
715 | fatal(0, "error updating %s.db: %s", what, db_strerror(err)); | |
716 | } | |
717 | } | |
718 | ||
719 | /* search primitives *********************************************************/ | |
720 | ||
721 | /* return true iff NAME is a trackname_display_ pref */ | |
722 | static int is_display_pref(const char *name) { | |
723 | static const char prefix[] = "trackname_display_"; | |
724 | return !strncmp(name, prefix, (sizeof prefix) - 1); | |
725 | } | |
726 | ||
c85b7022 RK |
727 | /** @brief Word_Break property tailor that treats underscores as spaces */ |
728 | static int tailor_underscore_Word_Break_Other(uint32_t c) { | |
729 | switch(c) { | |
730 | default: | |
731 | return -1; | |
732 | case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */ | |
733 | return unicode_Word_Break_Other; | |
734 | } | |
735 | } | |
736 | ||
3c82b504 RK |
737 | /** @brief Remove all combining characters in-place |
738 | * @param s Pointer to start of string | |
739 | * @param ns Length of string | |
740 | * @return New, possiblby reduced, length | |
741 | */ | |
742 | static size_t remove_combining_chars(uint32_t *s, size_t ns) { | |
743 | uint32_t *start = s, *t = s, *end = s + ns; | |
744 | ||
745 | while(s < end) { | |
746 | const uint32_t c = *s++; | |
747 | if(!utf32_combining_class(c)) | |
748 | *t++ = c; | |
749 | } | |
750 | return t - start; | |
751 | } | |
752 | ||
c85b7022 RK |
753 | /** @brief Normalize and split a string using a given tailoring */ |
754 | static void word_split(struct vector *v, | |
755 | const char *s, | |
756 | unicode_property_tailor *pt) { | |
757 | size_t nw, nt32, i; | |
758 | uint32_t *t32, **w32; | |
759 | ||
760 | /* Convert to UTF-32 */ | |
761 | if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32))) | |
762 | return; | |
763 | /* Erase case distinctions */ | |
764 | if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32))) | |
765 | return; | |
3c82b504 RK |
766 | /* Drop combining characters */ |
767 | nt32 = remove_combining_chars(t32, nt32); | |
c85b7022 RK |
768 | /* Split into words, treating _ as a space */ |
769 | w32 = utf32_word_split(t32, nt32, &nw, pt); | |
770 | /* Convert words back to UTF-8 and append to result */ | |
771 | for(i = 0; i < nw; ++i) | |
772 | vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0)); | |
773 | } | |
774 | ||
a3777123 RK |
775 | /** @brief Normalize a tag |
776 | * @param s Tag | |
777 | * @param ns Length of tag | |
778 | * @return Normalized string or NULL on error | |
779 | * | |
780 | * The return value will be: | |
781 | * - case-folded | |
782 | * - have no leading or trailing space | |
783 | * - have no combining characters | |
784 | * - all spacing between words will be a single U+0020 SPACE | |
785 | */ | |
786 | static char *normalize_tag(const char *s, size_t ns) { | |
787 | uint32_t *s32, **w32; | |
788 | size_t ns32, nw32, i; | |
789 | struct dynstr d[1]; | |
790 | ||
791 | if(!(s32 = utf8_to_utf32(s, ns, &ns32))) | |
792 | return 0; | |
793 | if(!(s32 = utf32_casefold_compat(s32, ns32, &ns32))) /* ->NFKD */ | |
794 | return 0; | |
795 | ns32 = remove_combining_chars(s32, ns32); | |
796 | /* Split into words, no Word_Break tailoring */ | |
797 | w32 = utf32_word_split(s32, ns32, &nw32, 0); | |
798 | /* Compose back into a string */ | |
799 | dynstr_init(d); | |
800 | for(i = 0; i < nw32; ++i) { | |
801 | if(i) | |
802 | dynstr_append(d, ' '); | |
803 | dynstr_append_string(d, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0)); | |
804 | } | |
805 | dynstr_terminate(d); | |
806 | return d->vec; | |
807 | } | |
808 | ||
460b9539 | 809 | /* compute the words of a track name */ |
810 | static char **track_to_words(const char *track, | |
811 | const struct kvp *p) { | |
812 | struct vector v; | |
a8747834 | 813 | const char *rootless = track_rootless(track); |
460b9539 | 814 | |
a8747834 | 815 | if(!rootless) |
816 | rootless = track; /* bodge */ | |
460b9539 | 817 | vector_init(&v); |
c85b7022 RK |
818 | rootless = strip_extension(rootless); |
819 | word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other); | |
460b9539 | 820 | for(; p; p = p->next) |
821 | if(is_display_pref(p->name)) | |
c85b7022 | 822 | word_split(&v, p->value, 0); |
460b9539 | 823 | vector_terminate(&v); |
824 | return dedupe(v.vec, v.nvec); | |
825 | } | |
826 | ||
827 | /* return nonzero iff WORD is a stopword */ | |
828 | static int stopword(const char *word) { | |
829 | int n; | |
830 | ||
831 | for(n = 0; n < config->stopword.n | |
832 | && strcmp(word, config->stopword.s[n]); ++n) | |
833 | ; | |
834 | return n < config->stopword.n; | |
835 | } | |
836 | ||
837 | /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */ | |
838 | static int register_search_word(const char *track, const char *word, | |
839 | DB_TXN *tid) { | |
840 | if(stopword(word)) return 0; | |
841 | return register_word(trackdb_searchdb, "search", track, word, tid); | |
842 | } | |
843 | ||
844 | /* Tags **********************************************************************/ | |
845 | ||
846 | /* Return nonzero if C is a valid tag character */ | |
847 | static int tagchar(int c) { | |
848 | switch(c) { | |
849 | case ',': | |
850 | return 0; | |
851 | default: | |
852 | return c >= ' '; | |
853 | } | |
854 | } | |
855 | ||
856 | /* Parse and de-dupe a tag list. If S=0 then assumes "". */ | |
91c9324a | 857 | char **parsetags(const char *s) { |
460b9539 | 858 | const char *t; |
859 | struct vector v; | |
860 | ||
861 | vector_init(&v); | |
862 | if(s) { | |
863 | /* skip initial separators */ | |
864 | while(*s && (!tagchar(*s) || *s == ' ')) | |
865 | ++s; | |
866 | while(*s) { | |
867 | /* find the extent of the tag */ | |
868 | t = s; | |
869 | while(*s && tagchar(*s)) | |
870 | ++s; | |
871 | /* strip trailing spaces */ | |
872 | while(s > t && s[-1] == ' ') | |
873 | --s; | |
a3777123 RK |
874 | /* add tag to list */ |
875 | vector_append(&v, normalize_tag(t, (size_t)(s - t))); | |
460b9539 | 876 | /* skip intermediate and trailing separators */ |
877 | while(*s && (!tagchar(*s) || *s == ' ')) | |
878 | ++s; | |
879 | } | |
880 | } | |
881 | vector_terminate(&v); | |
882 | return dedupe(v.vec, v.nvec); | |
883 | } | |
884 | ||
885 | /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */ | |
886 | static int register_tag(const char *track, const char *tag, DB_TXN *tid) { | |
887 | return register_word(trackdb_tagsdb, "tags", track, tag, tid); | |
888 | } | |
889 | ||
890 | /* aliases *******************************************************************/ | |
891 | ||
892 | /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If | |
893 | * there is no alias sets *aliasp to 0. */ | |
894 | static int compute_alias(char **aliasp, | |
895 | const char *track, | |
896 | const struct kvp *p, | |
897 | DB_TXN *tid) { | |
898 | struct dynstr d; | |
899 | const char *s = config->alias, *t, *expansion, *part; | |
900 | int c, used_db = 0, slash_prefix, err; | |
901 | struct kvp *at; | |
137e36ed | 902 | const char *const root = find_track_root(track); |
460b9539 | 903 | |
137e36ed | 904 | if(!root) { |
905 | /* Bodge for tracks with no root */ | |
906 | *aliasp = 0; | |
907 | return 0; | |
908 | } | |
460b9539 | 909 | dynstr_init(&d); |
137e36ed | 910 | dynstr_append_string(&d, root); |
460b9539 | 911 | while((c = (unsigned char)*s++)) { |
912 | if(c != '{') { | |
913 | dynstr_append(&d, c); | |
914 | continue; | |
915 | } | |
916 | if((slash_prefix = (*s == '/'))) | |
917 | s++; | |
918 | t = strchr(s, '}'); | |
919 | assert(t != 0); /* validated at startup */ | |
920 | part = xstrndup(s, t - s); | |
921 | expansion = getpart(track, "display", part, p, &used_db); | |
922 | if(*expansion) { | |
923 | if(slash_prefix) dynstr_append(&d, '/'); | |
924 | dynstr_append_string(&d, expansion); | |
925 | } | |
926 | s = t + 1; /* skip {part} */ | |
927 | } | |
928 | /* only admit to the alias if we used the db... */ | |
929 | if(!used_db) { | |
930 | *aliasp = 0; | |
931 | return 0; | |
932 | } | |
933 | dynstr_terminate(&d); | |
934 | /* ...and the answer differs from the original... */ | |
935 | if(!strcmp(track, d.vec)) { | |
936 | *aliasp = 0; | |
937 | return 0; | |
938 | } | |
939 | /* ...and there isn't already a different track with that name (including as | |
940 | * an alias) */ | |
941 | switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) { | |
942 | case 0: | |
460b9539 | 943 | if((s = kvp_get(at, "_alias_for")) |
944 | && !strcmp(s, track)) { | |
945 | case DB_NOTFOUND: | |
460b9539 | 946 | *aliasp = d.vec; |
947 | } else { | |
460b9539 | 948 | *aliasp = 0; |
949 | } | |
950 | return 0; | |
951 | default: | |
952 | return err; | |
953 | } | |
954 | } | |
955 | ||
956 | /* get track and prefs data (if tp/pp not null pointers). Returns 0 on | |
957 | * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK. | |
958 | * Always sets the return values, even if only to null pointers. */ | |
959 | static int gettrackdata(const char *track, | |
960 | struct kvp **tp, | |
961 | struct kvp **pp, | |
962 | const char **actualp, | |
963 | unsigned flags, | |
964 | #define GTD_NOALIAS 0x0001 | |
965 | DB_TXN *tid) { | |
966 | int err; | |
967 | const char *actual = track; | |
968 | struct kvp *t = 0, *p = 0; | |
f0feb22e | 969 | |
460b9539 | 970 | if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done; |
971 | if((actual = kvp_get(t, "_alias_for"))) { | |
972 | if(flags & GTD_NOALIAS) { | |
973 | error(0, "alias passed to gettrackdata where real path required"); | |
974 | abort(); | |
975 | } | |
976 | if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done; | |
977 | } else | |
978 | actual = track; | |
979 | assert(actual != 0); | |
980 | if(pp) { | |
981 | if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK) | |
982 | goto done; | |
983 | } | |
984 | err = 0; | |
985 | done: | |
986 | if(actualp) *actualp = actual; | |
987 | if(tp) *tp = t; | |
988 | if(pp) *pp = p; | |
989 | return err; | |
990 | } | |
991 | ||
992 | /* trackdb_notice() **********************************************************/ | |
993 | ||
6c81eef9 | 994 | /** @brief notice a possibly new track |
2a10b70b RK |
995 | * @return @c DB_NOTFOUND if new, 0 if already known |
996 | */ | |
460b9539 | 997 | int trackdb_notice(const char *track, |
998 | const char *path) { | |
999 | int err; | |
1000 | DB_TXN *tid; | |
f0feb22e | 1001 | |
460b9539 | 1002 | for(;;) { |
1003 | tid = trackdb_begin_transaction(); | |
1004 | err = trackdb_notice_tid(track, path, tid); | |
1005 | if((err == DB_LOCK_DEADLOCK)) goto fail; | |
1006 | break; | |
1007 | fail: | |
1008 | trackdb_abort_transaction(tid); | |
1009 | } | |
1010 | trackdb_commit_transaction(tid); | |
1011 | return err; | |
1012 | } | |
1013 | ||
6c81eef9 | 1014 | /** @brief notice a possibly new track |
f9635e06 RK |
1015 | * @param track NFC UTF-8 track name |
1016 | * @param path Raw path name | |
1017 | * @param tid Transaction ID | |
2a10b70b RK |
1018 | * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also |
1019 | */ | |
460b9539 | 1020 | int trackdb_notice_tid(const char *track, |
1021 | const char *path, | |
1022 | DB_TXN *tid) { | |
1023 | int err, n; | |
1024 | struct kvp *t, *a, *p; | |
1025 | int t_changed, ret; | |
343c64f2 RK |
1026 | char *alias, **w, *noticed; |
1027 | time_t now; | |
2a10b70b | 1028 | |
460b9539 | 1029 | /* notice whether the tracks.db entry changes */ |
1030 | t_changed = 0; | |
1031 | /* get any existing tracks entry */ | |
1032 | if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
1033 | return err; | |
2a10b70b | 1034 | ret = err; /* 0 or DB_NOTFOUND */ |
460b9539 | 1035 | /* this is a real track */ |
1036 | t_changed += kvp_set(&t, "_alias_for", 0); | |
1037 | t_changed += kvp_set(&t, "_path", path); | |
343c64f2 RK |
1038 | time(&now); |
1039 | if(ret == DB_NOTFOUND) { | |
1040 | /* It's a new track; record the time */ | |
1041 | byte_xasprintf(¬iced, "%lld", (long long)now); | |
1042 | t_changed += kvp_set(&t, "_noticed", noticed); | |
1043 | } | |
460b9539 | 1044 | /* if we have an alias record it in the database */ |
1045 | if((err = compute_alias(&alias, track, p, tid))) return err; | |
1046 | if(alias) { | |
1047 | /* won't overwrite someone else's alias as compute_alias() checks */ | |
1048 | D(("%s: alias %s", track, alias)); | |
1049 | a = 0; | |
1050 | kvp_set(&a, "_alias_for", track); | |
1051 | if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err; | |
1052 | } | |
1053 | /* update search.db */ | |
1054 | w = track_to_words(track, p); | |
1055 | for(n = 0; w[n]; ++n) | |
1056 | if((err = register_search_word(track, w[n], tid))) | |
1057 | return err; | |
1058 | /* update tags.db */ | |
1059 | w = parsetags(kvp_get(p, "tags")); | |
1060 | for(n = 0; w[n]; ++n) | |
1061 | if((err = register_tag(track, w[n], tid))) | |
1062 | return err; | |
460b9539 | 1063 | /* only store the tracks.db entry if it has changed */ |
1064 | if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))) | |
1065 | return err; | |
2a10b70b RK |
1066 | if(ret == DB_NOTFOUND) { |
1067 | uint32_t timestamp[2]; | |
2a10b70b RK |
1068 | DBT key, data; |
1069 | ||
2a10b70b RK |
1070 | timestamp[0] = htonl((uint64_t)now >> 32); |
1071 | timestamp[1] = htonl((uint32_t)now); | |
1072 | memset(&key, 0, sizeof key); | |
1073 | key.data = timestamp; | |
1074 | key.size = sizeof timestamp; | |
1075 | switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key, | |
1076 | make_key(&data, track), 0)) { | |
1077 | case 0: break; | |
1078 | case DB_LOCK_DEADLOCK: return err; | |
1079 | default: fatal(0, "error updating noticed.db: %s", db_strerror(err)); | |
1080 | } | |
1081 | } | |
460b9539 | 1082 | return ret; |
1083 | } | |
1084 | ||
1085 | /* trackdb_obsolete() ********************************************************/ | |
1086 | ||
1087 | /* obsolete a track */ | |
1088 | int trackdb_obsolete(const char *track, DB_TXN *tid) { | |
1089 | int err, n; | |
1090 | struct kvp *p; | |
1091 | char *alias, **w; | |
1092 | ||
1093 | if((err = gettrackdata(track, 0, &p, 0, | |
1094 | GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK) | |
1095 | return err; | |
1096 | else if(err == DB_NOTFOUND) return 0; | |
1097 | /* compute the alias, if any, and delete it */ | |
f0feb22e | 1098 | if((err = compute_alias(&alias, track, p, tid))) return err; |
460b9539 | 1099 | if(alias) { |
1100 | /* if the alias points to some other track then compute_alias won't | |
1101 | * return it */ | |
f0feb22e RK |
1102 | if((err = trackdb_delkey(trackdb_tracksdb, alias, tid)) |
1103 | && err != DB_NOTFOUND) | |
460b9539 | 1104 | return err; |
1105 | } | |
1106 | /* update search.db */ | |
1107 | w = track_to_words(track, p); | |
1108 | for(n = 0; w[n]; ++n) | |
1109 | if(trackdb_delkeydata(trackdb_searchdb, | |
1110 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
1111 | return err; | |
1112 | /* update tags.db */ | |
1113 | w = parsetags(kvp_get(p, "tags")); | |
1114 | for(n = 0; w[n]; ++n) | |
1115 | if(trackdb_delkeydata(trackdb_tagsdb, | |
1116 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
1117 | return err; | |
460b9539 | 1118 | /* update tracks.db */ |
1119 | if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK) | |
1120 | return err; | |
1121 | /* We don't delete the prefs, so they survive temporary outages of the | |
1122 | * (possibly virtual) track filesystem */ | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /* trackdb_stats() ***********************************************************/ | |
1127 | ||
1128 | #define H(name) { #name, offsetof(DB_HASH_STAT, name) } | |
1129 | #define B(name) { #name, offsetof(DB_BTREE_STAT, name) } | |
1130 | ||
1131 | static const struct statinfo { | |
1132 | const char *name; | |
1133 | size_t offset; | |
1134 | } statinfo_hash[] = { | |
1135 | H(hash_magic), | |
1136 | H(hash_version), | |
1137 | H(hash_nkeys), | |
1138 | H(hash_ndata), | |
1139 | H(hash_pagesize), | |
1140 | H(hash_ffactor), | |
1141 | H(hash_buckets), | |
1142 | H(hash_free), | |
1143 | H(hash_bfree), | |
1144 | H(hash_bigpages), | |
1145 | H(hash_big_bfree), | |
1146 | H(hash_overflows), | |
1147 | H(hash_ovfl_free), | |
1148 | H(hash_dup), | |
1149 | H(hash_dup_free), | |
1150 | }, statinfo_btree[] = { | |
1151 | B(bt_magic), | |
1152 | B(bt_version), | |
1153 | B(bt_nkeys), | |
1154 | B(bt_ndata), | |
1155 | B(bt_pagesize), | |
1156 | B(bt_minkey), | |
1157 | B(bt_re_len), | |
1158 | B(bt_re_pad), | |
1159 | B(bt_levels), | |
1160 | B(bt_int_pg), | |
1161 | B(bt_leaf_pg), | |
1162 | B(bt_dup_pg), | |
1163 | B(bt_over_pg), | |
1164 | B(bt_free), | |
1165 | B(bt_int_pgfree), | |
1166 | B(bt_leaf_pgfree), | |
1167 | B(bt_dup_pgfree), | |
1168 | B(bt_over_pgfree), | |
1169 | }; | |
1170 | ||
1171 | /* look up stats for DB */ | |
1172 | static int get_stats(struct vector *v, | |
1173 | DB *database, | |
1174 | const struct statinfo *si, | |
1175 | size_t nsi, | |
1176 | DB_TXN *tid) { | |
1177 | void *sp; | |
1178 | size_t n; | |
1179 | char *str; | |
1180 | int err; | |
1181 | ||
1182 | if(database) { | |
1183 | switch(err = database->stat(database, tid, &sp, 0)) { | |
1184 | case 0: | |
1185 | break; | |
1186 | case DB_LOCK_DEADLOCK: | |
1187 | error(0, "error querying database: %s", db_strerror(err)); | |
1188 | return err; | |
1189 | default: | |
1190 | fatal(0, "error querying database: %s", db_strerror(err)); | |
1191 | } | |
1192 | for(n = 0; n < nsi; ++n) { | |
1193 | byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name, | |
1194 | (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset)); | |
1195 | vector_append(v, str); | |
1196 | } | |
1197 | } | |
1198 | return 0; | |
1199 | } | |
1200 | ||
ff76b21b | 1201 | /** @brief One entry in the search league */ |
460b9539 | 1202 | struct search_entry { |
1203 | char *word; | |
1204 | int n; | |
1205 | }; | |
1206 | ||
ff76b21b RK |
1207 | /** @brief Add a word to the search league |
1208 | * @param se Pointer to search league | |
1209 | * @param count Maximum size for search league | |
1210 | * @param nse Current size of search league | |
1211 | * @param word New word, or NULL | |
1212 | * @param n How often @p word appears | |
1213 | * @return New size of search league | |
1214 | */ | |
1215 | static int register_search_entry(struct search_entry *se, | |
1216 | int count, | |
1217 | int nse, | |
1218 | char *word, | |
1219 | int n) { | |
1220 | int i; | |
1221 | ||
1222 | if(word && (nse < count || n > se[nse - 1].n)) { | |
1223 | /* Find the starting point */ | |
1224 | if(nse == count) | |
1225 | i = nse - 1; | |
1226 | else | |
1227 | i = nse++; | |
1228 | /* Find the insertion point */ | |
1229 | while(i > 0 && n > se[i - 1].n) | |
1230 | --i; | |
1231 | memmove(&se[i + 1], &se[i], (nse - i - 1) * sizeof *se); | |
1232 | se[i].word = word; | |
1233 | se[i].n = n; | |
1234 | } | |
1235 | return nse; | |
1236 | } | |
1237 | ||
460b9539 | 1238 | /* find the top COUNT words in the search database */ |
1239 | static int search_league(struct vector *v, int count, DB_TXN *tid) { | |
1240 | struct search_entry *se; | |
1241 | DBT k, d; | |
1242 | DBC *cursor; | |
1243 | int err, n = 0, nse = 0, i; | |
1244 | char *word = 0; | |
1245 | size_t wl = 0; | |
1246 | char *str; | |
1247 | ||
1248 | cursor = trackdb_opencursor(trackdb_searchdb, tid); | |
1249 | se = xmalloc(count * sizeof *se); | |
ff76b21b RK |
1250 | /* Walk across the whole database counting up the number of times each |
1251 | * word appears. */ | |
460b9539 | 1252 | while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d), |
1253 | DB_NEXT))) { | |
1254 | if(word && wl == k.size && !strncmp(word, k.data, wl)) | |
ff76b21b | 1255 | ++n; /* same word again */ |
460b9539 | 1256 | else { |
ff76b21b | 1257 | nse = register_search_entry(se, count, nse, word, n); |
460b9539 | 1258 | word = xstrndup(k.data, wl = k.size); |
1259 | n = 1; | |
1260 | } | |
1261 | } | |
1262 | switch(err) { | |
1263 | case DB_NOTFOUND: | |
1264 | err = 0; | |
1265 | break; | |
1266 | case DB_LOCK_DEADLOCK: | |
1267 | error(0, "error querying search database: %s", db_strerror(err)); | |
1268 | break; | |
1269 | default: | |
1270 | fatal(0, "error querying search database: %s", db_strerror(err)); | |
1271 | } | |
1272 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1273 | if(err) return err; | |
ff76b21b | 1274 | nse = register_search_entry(se, count, nse, word, n); |
460b9539 | 1275 | byte_xasprintf(&str, "Top %d search words:", nse); |
1276 | vector_append(v, str); | |
1277 | for(i = 0; i < nse; ++i) { | |
1278 | byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word); | |
1279 | vector_append(v, str); | |
1280 | } | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | #define SI(what) statinfo_##what, \ | |
1285 | sizeof statinfo_##what / sizeof (struct statinfo) | |
1286 | ||
1287 | /* return a list of database stats */ | |
1288 | char **trackdb_stats(int *nstatsp) { | |
1289 | DB_TXN *tid; | |
1290 | struct vector v; | |
f0feb22e | 1291 | |
460b9539 | 1292 | vector_init(&v); |
1293 | for(;;) { | |
1294 | tid = trackdb_begin_transaction(); | |
1295 | v.nvec = 0; | |
1296 | vector_append(&v, (char *)"Tracks database stats:"); | |
1297 | if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail; | |
1298 | vector_append(&v, (char *)""); | |
1299 | vector_append(&v, (char *)"Search database stats:"); | |
1300 | if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail; | |
1301 | vector_append(&v, (char *)""); | |
1302 | vector_append(&v, (char *)"Prefs database stats:"); | |
1303 | if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail; | |
1304 | vector_append(&v, (char *)""); | |
1305 | if(search_league(&v, 10, tid)) goto fail; | |
460b9539 | 1306 | vector_terminate(&v); |
1307 | break; | |
1308 | fail: | |
1309 | trackdb_abort_transaction(tid); | |
1310 | } | |
1311 | trackdb_commit_transaction(tid); | |
1312 | if(nstatsp) *nstatsp = v.nvec; | |
1313 | return v.vec; | |
1314 | } | |
1315 | ||
d6dde5a3 RK |
1316 | struct stats_details { |
1317 | void (*done)(char *data, void *u); | |
1318 | void *u; | |
1319 | int exited; /* subprocess exited */ | |
1320 | int closed; /* pipe close */ | |
1321 | int wstat; /* wait status from subprocess */ | |
1322 | struct dynstr data[1]; /* data read from pipe */ | |
1323 | }; | |
1324 | ||
1325 | static void stats_complete(struct stats_details *d) { | |
1326 | char *s; | |
ff76b21b | 1327 | |
d6dde5a3 RK |
1328 | if(!(d->exited && d->closed)) |
1329 | return; | |
1330 | byte_xasprintf(&s, "\n" | |
1331 | "Server stats:\n" | |
1332 | "track lookup cache hits: %lu\n" | |
1333 | "track lookup cache misses: %lu\n", | |
1334 | cache_files_hits, | |
1335 | cache_files_misses); | |
1336 | dynstr_append_string(d->data, s); | |
1337 | dynstr_terminate(d->data); | |
1338 | d->done(d->data->vec, d->u); | |
1339 | } | |
1340 | ||
1341 | static int stats_finished(ev_source attribute((unused)) *ev, | |
1342 | pid_t attribute((unused)) pid, | |
1343 | int status, | |
1344 | const struct rusage attribute((unused)) *rusage, | |
1345 | void *u) { | |
1346 | struct stats_details *const d = u; | |
1347 | ||
1348 | d->exited = 1; | |
1349 | if(status) | |
1350 | error(0, "disorder-stats %s", wstat(status)); | |
1351 | stats_complete(d); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | static int stats_read(ev_source attribute((unused)) *ev, | |
1356 | ev_reader *reader, | |
d6dde5a3 RK |
1357 | void *ptr, |
1358 | size_t bytes, | |
1359 | int eof, | |
1360 | void *u) { | |
1361 | struct stats_details *const d = u; | |
1362 | ||
1363 | dynstr_append_bytes(d->data, ptr, bytes); | |
1364 | ev_reader_consume(reader, bytes); | |
1365 | if(eof) | |
1366 | d->closed = 1; | |
1367 | stats_complete(d); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static int stats_error(ev_source attribute((unused)) *ev, | |
d6dde5a3 RK |
1372 | int errno_value, |
1373 | void *u) { | |
1374 | struct stats_details *const d = u; | |
1375 | ||
1376 | error(errno_value, "error reading from pipe to disorder-stats"); | |
1377 | d->closed = 1; | |
1378 | stats_complete(d); | |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | void trackdb_stats_subprocess(ev_source *ev, | |
1383 | void (*done)(char *data, void *u), | |
1384 | void *u) { | |
1385 | int p[2]; | |
1386 | pid_t pid; | |
1387 | struct stats_details *d = xmalloc(sizeof *d); | |
1388 | ||
1389 | dynstr_init(d->data); | |
1390 | d->done = done; | |
1391 | d->u = u; | |
1392 | xpipe(p); | |
ffac51d7 | 1393 | pid = subprogram(ev, p[1], "disorder-stats", (char *)0); |
d6dde5a3 RK |
1394 | xclose(p[1]); |
1395 | ev_child(ev, pid, 0, stats_finished, d); | |
1396 | ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader"); | |
1397 | } | |
1398 | ||
02eaa49d RK |
1399 | /** @brief Parse a track name part preference |
1400 | * @param name Preference name | |
1401 | * @param partp Where to store part name | |
1402 | * @param contextp Where to store context name | |
1403 | * @return 0 on success, non-0 if parse fails | |
1404 | */ | |
1405 | static int trackdb__parse_namepref(const char *name, | |
1406 | char **partp, | |
1407 | char **contextp) { | |
1408 | char *c; | |
1409 | static const char prefix[] = "trackname_"; | |
1410 | ||
1411 | if(strncmp(name, prefix, strlen(prefix))) | |
1412 | return -1; /* not trackname_* at all */ | |
1413 | name += strlen(prefix); | |
1414 | /* There had better be a _ between context and part */ | |
1415 | c = strchr(name, '_'); | |
1416 | if(!c) | |
1417 | return -1; | |
1418 | /* Context is first in the pref name even though most APIs have the part | |
1419 | * first. Confusing; sorry. */ | |
1420 | *contextp = xstrndup(name, c - name); | |
1421 | ++c; | |
1422 | /* There had better NOT be a second _ */ | |
1423 | if(strchr(c, '_')) | |
1424 | return -1; | |
1425 | *partp = xstrdup(c); | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | /** @brief Compute the default value for a track preference | |
1430 | * @param track Track name | |
1431 | * @param name Preference name | |
1432 | * @return Default value or 0 if none/not known | |
1433 | */ | |
1434 | static const char *trackdb__default(const char *track, const char *name) { | |
1435 | char *context, *part; | |
1436 | ||
1437 | if(!trackdb__parse_namepref(name, &part, &context)) { | |
1438 | /* We can work out the default for a trackname_ pref */ | |
1439 | return trackname_part(track, context, part); | |
1440 | } else if(!strcmp(name, "weight")) { | |
1441 | /* We know the default weight */ | |
1442 | return "90000"; | |
1443 | } else if(!strcmp(name, "pick_at_random")) { | |
1444 | /* By default everything is eligible for picking at random */ | |
1445 | return "1"; | |
1446 | } else if(!strcmp(name, "tags")) { | |
1447 | /* By default everything no track has any tags */ | |
1448 | return ""; | |
1449 | } | |
1450 | return 0; | |
1451 | } | |
1452 | ||
460b9539 | 1453 | /* set a pref (remove if value=0) */ |
1454 | int trackdb_set(const char *track, | |
1455 | const char *name, | |
1456 | const char *value) { | |
1457 | struct kvp *t, *p, *a; | |
1458 | DB_TXN *tid; | |
1459 | int err, cmp; | |
1460 | char *oldalias, *newalias, **oldtags = 0, **newtags; | |
02eaa49d | 1461 | const char *def; |
460b9539 | 1462 | |
02eaa49d RK |
1463 | /* If the value matches the default then unset instead, to keep the database |
1464 | * tidy. Older versions did not have this feature so your database may yet | |
1465 | * have some default values stored in it. */ | |
f26f062a | 1466 | if(value) { |
02eaa49d RK |
1467 | def = trackdb__default(track, name); |
1468 | if(def && !strcmp(value, def)) | |
1469 | value = 0; | |
f26f062a | 1470 | } |
f0feb22e | 1471 | |
460b9539 | 1472 | for(;;) { |
1473 | tid = trackdb_begin_transaction(); | |
1474 | if((err = gettrackdata(track, &t, &p, 0, | |
1475 | 0, tid)) == DB_LOCK_DEADLOCK) | |
1476 | goto fail; | |
1477 | if(err == DB_NOTFOUND) break; | |
1478 | if(name[0] == '_') { | |
1479 | if(kvp_set(&t, name, value)) | |
1480 | if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)) | |
1481 | goto fail; | |
1482 | } else { | |
1483 | /* get the old alias name */ | |
1484 | if(compute_alias(&oldalias, track, p, tid)) goto fail; | |
1485 | /* get the old tags */ | |
1486 | if(!strcmp(name, "tags")) | |
1487 | oldtags = parsetags(kvp_get(p, "tags")); | |
1488 | /* set the value */ | |
1489 | if(kvp_set(&p, name, value)) | |
1490 | if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0)) | |
1491 | goto fail; | |
1492 | /* compute the new alias name */ | |
1493 | if((err = compute_alias(&newalias, track, p, tid))) goto fail; | |
1494 | /* check whether alias has changed */ | |
1495 | if(!(oldalias == newalias | |
1496 | || (oldalias && newalias && !strcmp(oldalias, newalias)))) { | |
1497 | /* adjust alias records to fit change */ | |
1498 | if(oldalias | |
f0feb22e RK |
1499 | && trackdb_delkey(trackdb_tracksdb, oldalias, tid) == DB_LOCK_DEADLOCK) |
1500 | goto fail; | |
460b9539 | 1501 | if(newalias) { |
1502 | a = 0; | |
1503 | kvp_set(&a, "_alias_for", track); | |
1504 | if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail; | |
1505 | } | |
1506 | } | |
1507 | /* check whether tags have changed */ | |
1508 | if(!strcmp(name, "tags")) { | |
1509 | newtags = parsetags(value); | |
1510 | while(*oldtags || *newtags) { | |
1511 | if(*oldtags && *newtags) { | |
1512 | cmp = strcmp(*oldtags, *newtags); | |
1513 | if(!cmp) { | |
1514 | /* keeping this tag */ | |
1515 | ++oldtags; | |
1516 | ++newtags; | |
1517 | } else if(cmp < 0) | |
1518 | /* old tag fits into a gap in the new list, so delete old */ | |
1519 | goto delete_old; | |
1520 | else | |
1521 | /* new tag fits into a gap in the old list, so insert new */ | |
1522 | goto insert_new; | |
1523 | } else if(*oldtags) { | |
1524 | /* we've run out of new tags, so remaining old ones are to be | |
1525 | * deleted */ | |
1526 | delete_old: | |
1527 | if(trackdb_delkeydata(trackdb_tagsdb, | |
1528 | *oldtags, track, tid) == DB_LOCK_DEADLOCK) | |
1529 | goto fail; | |
1530 | ++oldtags; | |
1531 | } else { | |
1532 | /* we've run out of old tags, so remainig new ones are to be | |
1533 | * inserted */ | |
1534 | insert_new: | |
1535 | if(register_tag(track, *newtags, tid)) goto fail; | |
1536 | ++newtags; | |
1537 | } | |
1538 | } | |
460b9539 | 1539 | } |
1540 | } | |
1541 | err = 0; | |
1542 | break; | |
1543 | fail: | |
1544 | trackdb_abort_transaction(tid); | |
1545 | } | |
1546 | trackdb_commit_transaction(tid); | |
1547 | return err == 0 ? 0 : -1; | |
1548 | } | |
1549 | ||
1550 | /* get a pref */ | |
1551 | const char *trackdb_get(const char *track, | |
1552 | const char *name) { | |
1553 | return kvp_get(trackdb_get_all(track), name); | |
1554 | } | |
1555 | ||
1556 | /* get all prefs as a 0-terminated array */ | |
1557 | struct kvp *trackdb_get_all(const char *track) { | |
1558 | struct kvp *t, *p, **pp; | |
1559 | DB_TXN *tid; | |
1560 | ||
1561 | for(;;) { | |
1562 | tid = trackdb_begin_transaction(); | |
1563 | if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1564 | goto fail; | |
1565 | break; | |
1566 | fail: | |
1567 | trackdb_abort_transaction(tid); | |
1568 | } | |
1569 | trackdb_commit_transaction(tid); | |
1570 | for(pp = &p; *pp; pp = &(*pp)->next) | |
1571 | ; | |
1572 | *pp = t; | |
1573 | return p; | |
1574 | } | |
1575 | ||
1576 | /* resolve alias */ | |
1577 | const char *trackdb_resolve(const char *track) { | |
1578 | DB_TXN *tid; | |
1579 | const char *actual; | |
f0feb22e | 1580 | |
460b9539 | 1581 | for(;;) { |
1582 | tid = trackdb_begin_transaction(); | |
1583 | if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK) | |
1584 | goto fail; | |
1585 | break; | |
1586 | fail: | |
1587 | trackdb_abort_transaction(tid); | |
1588 | } | |
1589 | trackdb_commit_transaction(tid); | |
1590 | return actual; | |
1591 | } | |
1592 | ||
1593 | int trackdb_isalias(const char *track) { | |
1594 | const char *actual = trackdb_resolve(track); | |
1595 | ||
1596 | return strcmp(actual, track); | |
1597 | } | |
1598 | ||
1599 | /* test whether a track exists (perhaps an alias) */ | |
1600 | int trackdb_exists(const char *track) { | |
1601 | DB_TXN *tid; | |
1602 | int err; | |
1603 | ||
1604 | for(;;) { | |
1605 | tid = trackdb_begin_transaction(); | |
1606 | /* unusually, here we want the return value */ | |
1607 | if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
1608 | goto fail; | |
1609 | break; | |
1610 | fail: | |
1611 | trackdb_abort_transaction(tid); | |
1612 | } | |
1613 | trackdb_commit_transaction(tid); | |
1614 | return (err == 0); | |
1615 | } | |
1616 | ||
1617 | /* return the list of tags */ | |
1618 | char **trackdb_alltags(void) { | |
c3be4f19 RK |
1619 | int e; |
1620 | struct vector v[1]; | |
460b9539 | 1621 | |
5b3f0631 | 1622 | vector_init(v); |
c3be4f19 RK |
1623 | WITH_TRANSACTION(trackdb_listkeys(trackdb_tagsdb, v, tid)); |
1624 | return v->vec; | |
460b9539 | 1625 | } |
1626 | ||
c3be4f19 RK |
1627 | /** @brief List all the keys in @p db |
1628 | * @param db Database | |
1629 | * @param v Vector to store keys in | |
1630 | * @param tid Transaction ID | |
1631 | * @return 0 or DB_LOCK_DEADLOCK | |
1632 | */ | |
1633 | int trackdb_listkeys(DB *db, struct vector *v, DB_TXN *tid) { | |
1634 | int e; | |
460b9539 | 1635 | DBT k, d; |
c3be4f19 | 1636 | DBC *const c = trackdb_opencursor(db, tid); |
460b9539 | 1637 | |
c3be4f19 | 1638 | v->nvec = 0; |
460b9539 | 1639 | memset(&k, 0, sizeof k); |
c3be4f19 RK |
1640 | while(!(e = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP))) |
1641 | vector_append(v, xstrndup(k.data, k.size)); | |
1642 | switch(e) { | |
460b9539 | 1643 | case DB_NOTFOUND: |
1644 | break; | |
1645 | case DB_LOCK_DEADLOCK: | |
c3be4f19 | 1646 | return e; |
460b9539 | 1647 | default: |
c3be4f19 | 1648 | fatal(0, "c->c_get: %s", db_strerror(e)); |
460b9539 | 1649 | } |
c3be4f19 RK |
1650 | if((e = trackdb_closecursor(c))) |
1651 | return e; | |
1652 | vector_terminate(v); | |
460b9539 | 1653 | return 0; |
1654 | } | |
1655 | ||
1656 | /* return 1 iff sorted tag lists A and B have at least one member in common */ | |
91c9324a | 1657 | int tag_intersection(char **a, char **b) { |
460b9539 | 1658 | int cmp; |
1659 | ||
1660 | /* Same sort of logic as trackdb_set() above */ | |
1661 | while(*a && *b) { | |
1662 | if(!(cmp = strcmp(*a, *b))) return 1; | |
1663 | else if(cmp < 0) ++a; | |
1664 | else ++b; | |
1665 | } | |
1666 | return 0; | |
1667 | } | |
1668 | ||
49a773eb RK |
1669 | static pid_t choose_pid = -1; |
1670 | static int choose_fd; | |
1671 | static random_callback *choose_callback; | |
1672 | static struct dynstr choose_output; | |
1673 | static unsigned choose_complete; | |
1674 | static int choose_status; | |
1675 | #define CHOOSE_RUNNING 1 | |
1676 | #define CHOOSE_READING 2 | |
1677 | ||
1678 | static void choose_finished(ev_source *ev, unsigned which) { | |
1679 | choose_complete |= which; | |
1680 | if(choose_complete != (CHOOSE_RUNNING|CHOOSE_READING)) | |
1681 | return; | |
1682 | choose_pid = -1; | |
1683 | if(choose_status == 0 && choose_output.nvec > 0) { | |
1684 | dynstr_terminate(&choose_output); | |
1685 | choose_callback(ev, xstrdup(choose_output.vec)); | |
1686 | } else | |
1687 | choose_callback(ev, 0); | |
1688 | } | |
1689 | ||
1690 | /** @brief Called when @c disorder-choose terminates */ | |
1691 | static int choose_exited(ev_source *ev, | |
1692 | pid_t attribute((unused)) pid, | |
1693 | int status, | |
1694 | const struct rusage attribute((unused)) *rusage, | |
1695 | void attribute((unused)) *u) { | |
1696 | if(status) | |
1697 | error(0, "disorder-choose %s", wstat(status)); | |
1698 | choose_status = status; | |
1699 | choose_finished(ev, CHOOSE_RUNNING); | |
460b9539 | 1700 | return 0; |
1701 | } | |
1702 | ||
49a773eb RK |
1703 | /** @brief Called with data from @c disorder-choose pipe */ |
1704 | static int choose_readable(ev_source *ev, | |
1705 | ev_reader *reader, | |
1706 | void *ptr, | |
1707 | size_t bytes, | |
1708 | int eof, | |
1709 | void attribute((unused)) *u) { | |
1710 | dynstr_append_bytes(&choose_output, ptr, bytes); | |
1711 | ev_reader_consume(reader, bytes); | |
1712 | if(eof) | |
1713 | choose_finished(ev, CHOOSE_READING); | |
1714 | return 0; | |
1715 | } | |
460b9539 | 1716 | |
49a773eb RK |
1717 | static int choose_read_error(ev_source *ev, |
1718 | int errno_value, | |
1719 | void attribute((unused)) *u) { | |
1720 | error(errno_value, "error reading disorder-choose pipe"); | |
1721 | choose_finished(ev, CHOOSE_READING); | |
1722 | return 0; | |
1723 | } | |
1724 | ||
1725 | /** @brief Request a random track | |
1726 | * @param ev Event source | |
1727 | * @param callback Called with random track or NULL | |
1728 | * @return 0 if a request was initiated, else -1 | |
1729 | * | |
1730 | * Initiates a random track choice. @p callback will later be called back with | |
1731 | * the choice (or NULL on error). If a choice is already underway then -1 is | |
1732 | * returned and there will be no additional callback. | |
1733 | * | |
1734 | * The caller shouldn't assume that the track returned actually exists (it | |
1735 | * might be removed between the choice and the callback, or between being added | |
1736 | * to the queue and being played). | |
1737 | */ | |
1738 | int trackdb_request_random(ev_source *ev, | |
1739 | random_callback *callback) { | |
1740 | int p[2]; | |
1741 | ||
1742 | if(choose_pid != -1) | |
1743 | return -1; /* don't run concurrent chooses */ | |
1744 | xpipe(p); | |
1745 | cloexec(p[0]); | |
1746 | choose_pid = subprogram(ev, p[1], "disorder-choose", (char *)0); | |
1747 | choose_fd = p[0]; | |
1748 | xclose(p[1]); | |
1749 | choose_callback = callback; | |
1750 | choose_output.nvec = 0; | |
1751 | choose_complete = 0; | |
1752 | ev_reader_new(ev, p[0], choose_readable, choose_read_error, 0, | |
1753 | "disorder-choose reader"); /* owns p[0] */ | |
1754 | ev_child(ev, choose_pid, 0, choose_exited, 0); /* owns the subprocess */ | |
1755 | return 0; | |
460b9539 | 1756 | } |
1757 | ||
1758 | /* get a track name given the prefs. Set *used_db to 1 if we got the answer | |
1759 | * from the prefs. */ | |
1760 | static const char *getpart(const char *track, | |
1761 | const char *context, | |
1762 | const char *part, | |
1763 | const struct kvp *p, | |
1764 | int *used_db) { | |
1765 | const char *result; | |
1766 | char *pref; | |
1767 | ||
1768 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1769 | if((result = kvp_get(p, pref))) | |
1770 | *used_db = 1; | |
1771 | else | |
1772 | result = trackname_part(track, context, part); | |
1773 | assert(result != 0); | |
1774 | return result; | |
1775 | } | |
1776 | ||
1777 | /* get a track name part, like trackname_part(), but taking the database into | |
1778 | * account. */ | |
1779 | const char *trackdb_getpart(const char *track, | |
1780 | const char *context, | |
1781 | const char *part) { | |
1782 | struct kvp *p; | |
1783 | DB_TXN *tid; | |
1784 | char *pref; | |
1785 | const char *actual; | |
1786 | int used_db, err; | |
1787 | ||
1788 | /* construct the full pref */ | |
1789 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1790 | for(;;) { | |
1791 | tid = trackdb_begin_transaction(); | |
1792 | if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK) | |
1793 | goto fail; | |
1794 | break; | |
1795 | fail: | |
1796 | trackdb_abort_transaction(tid); | |
1797 | } | |
1798 | trackdb_commit_transaction(tid); | |
1799 | return getpart(actual, context, part, p, &used_db); | |
1800 | } | |
1801 | ||
1802 | /* get the raw path name for @track@ (might be an alias) */ | |
1803 | const char *trackdb_rawpath(const char *track) { | |
1804 | DB_TXN *tid; | |
1805 | struct kvp *t; | |
1806 | const char *path; | |
1807 | ||
1808 | for(;;) { | |
1809 | tid = trackdb_begin_transaction(); | |
1810 | if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1811 | goto fail; | |
1812 | break; | |
1813 | fail: | |
1814 | trackdb_abort_transaction(tid); | |
1815 | } | |
1816 | trackdb_commit_transaction(tid); | |
1817 | if(!(path = kvp_get(t, "_path"))) path = track; | |
1818 | return path; | |
1819 | } | |
1820 | ||
1821 | /* trackdb_list **************************************************************/ | |
1822 | ||
1823 | /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually | |
1824 | * readable at some point */ | |
1825 | ||
1826 | /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE. | |
1827 | * If RE is a null pointer then it matches everything. */ | |
1828 | static int track_matches(size_t dl, const char *track, size_t tl, | |
1829 | const pcre *re) { | |
1830 | int ovec[3], rc; | |
1831 | ||
1832 | if(!re) | |
1833 | return 1; | |
1834 | track += dl + 1; | |
1835 | tl -= (dl + 1); | |
1836 | switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) { | |
1837 | case PCRE_ERROR_NOMATCH: return 0; | |
1838 | default: | |
1839 | if(rc < 0) { | |
1840 | error(0, "pcre_exec returned %d, subject '%s'", rc, track); | |
1841 | return 0; | |
1842 | } | |
1843 | return 1; | |
1844 | } | |
1845 | } | |
1846 | ||
1847 | static int do_list(struct vector *v, const char *dir, | |
1848 | enum trackdb_listable what, const pcre *re, DB_TXN *tid) { | |
1849 | DBC *cursor; | |
1850 | DBT k, d; | |
1851 | size_t dl; | |
1852 | char *ptr; | |
1853 | int err; | |
1854 | size_t l, last_dir_len = 0; | |
1855 | char *last_dir = 0, *track, *alias; | |
1856 | struct kvp *p; | |
f0feb22e | 1857 | |
460b9539 | 1858 | dl = strlen(dir); |
1859 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
1860 | make_key(&k, dir); | |
1861 | prepare_data(&d); | |
1862 | /* find the first key >= dir */ | |
1863 | err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE); | |
1864 | /* keep going while we're dealing with <dir/anything> */ | |
1865 | while(err == 0 | |
1866 | && k.size > dl | |
1867 | && ((char *)k.data)[dl] == '/' | |
1868 | && !memcmp(k.data, dir, dl)) { | |
1869 | ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1)); | |
1870 | if(ptr) { | |
1871 | /* we have <dir/component/anything>, so <dir/component> is a directory */ | |
1872 | l = ptr - (char *)k.data; | |
1873 | if(what & trackdb_directories) | |
1874 | if(!(last_dir | |
1875 | && l == last_dir_len | |
1876 | && !memcmp(last_dir, k.data, l))) { | |
1877 | last_dir = xstrndup(k.data, last_dir_len = l); | |
1878 | if(track_matches(dl, k.data, l, re)) | |
1879 | vector_append(v, last_dir); | |
1880 | } | |
1881 | } else { | |
1882 | /* found a plain file */ | |
1883 | if((what & trackdb_files)) { | |
1884 | track = xstrndup(k.data, k.size); | |
1885 | if((err = trackdb_getdata(trackdb_prefsdb, | |
1886 | track, &p, tid)) == DB_LOCK_DEADLOCK) | |
1887 | goto deadlocked; | |
1888 | /* if this file has an alias in the same directory then we skip it */ | |
1889 | if((err = compute_alias(&alias, track, p, tid))) | |
1890 | goto deadlocked; | |
1891 | if(!(alias && !strcmp(d_dirname(alias), d_dirname(track)))) | |
1892 | if(track_matches(dl, k.data, k.size, re)) | |
1893 | vector_append(v, track); | |
1894 | } | |
1895 | } | |
1896 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
1897 | } | |
1898 | switch(err) { | |
1899 | case 0: | |
1900 | break; | |
1901 | case DB_NOTFOUND: | |
1902 | err = 0; | |
1903 | break; | |
1904 | case DB_LOCK_DEADLOCK: | |
1905 | error(0, "error querying database: %s", db_strerror(err)); | |
1906 | break; | |
1907 | default: | |
1908 | fatal(0, "error querying database: %s", db_strerror(err)); | |
1909 | } | |
1910 | deadlocked: | |
1911 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1912 | return err; | |
1913 | } | |
1914 | ||
1915 | /* return the directories or files below @dir@ */ | |
1916 | char **trackdb_list(const char *dir, int *np, enum trackdb_listable what, | |
1917 | const pcre *re) { | |
1918 | DB_TXN *tid; | |
1919 | int n; | |
1920 | struct vector v; | |
1921 | ||
1922 | vector_init(&v); | |
1923 | for(;;) { | |
1924 | tid = trackdb_begin_transaction(); | |
1925 | v.nvec = 0; | |
1926 | if(dir) { | |
1927 | if(do_list(&v, dir, what, re, tid)) | |
1928 | goto fail; | |
1929 | } else { | |
1930 | for(n = 0; n < config->collection.n; ++n) | |
1931 | if(do_list(&v, config->collection.s[n].root, what, re, tid)) | |
1932 | goto fail; | |
1933 | } | |
1934 | break; | |
1935 | fail: | |
1936 | trackdb_abort_transaction(tid); | |
1937 | } | |
1938 | trackdb_commit_transaction(tid); | |
1939 | vector_terminate(&v); | |
1940 | if(np) | |
1941 | *np = v.nvec; | |
1942 | return v.vec; | |
f0feb22e | 1943 | } |
460b9539 | 1944 | |
1945 | /* If S is tag:something, return something. Else return 0. */ | |
1946 | static const char *checktag(const char *s) { | |
1947 | if(!strncmp(s, "tag:", 4)) | |
1948 | return s + 4; | |
1949 | else | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | /* return a list of tracks containing all of the words given. If you | |
1954 | * ask for only stopwords you get no tracks. */ | |
1955 | char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) { | |
1956 | const char **w, *best = 0, *tag; | |
1957 | char **twords, **tags; | |
d1d4a182 | 1958 | char *istag; |
460b9539 | 1959 | int i, j, n, err, what; |
1960 | DBC *cursor = 0; | |
1961 | DBT k, d; | |
1962 | struct vector u, v; | |
1963 | DB_TXN *tid; | |
1964 | struct kvp *p; | |
1965 | int ntags = 0; | |
1966 | DB *db; | |
1967 | const char *dbname; | |
1968 | ||
1969 | *ntracks = 0; /* for early returns */ | |
3c82b504 | 1970 | /* normalize all the words */ |
460b9539 | 1971 | w = xmalloc(nwordlist * sizeof (char *)); |
d1d4a182 | 1972 | istag = xmalloc_noptr(nwordlist); |
460b9539 | 1973 | for(n = 0; n < nwordlist; ++n) { |
3c82b504 RK |
1974 | uint32_t *w32; |
1975 | size_t nw32; | |
f0feb22e | 1976 | |
c85b7022 | 1977 | w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0); |
a3777123 RK |
1978 | if(checktag(w[n])) { |
1979 | ++ntags; /* count up tags */ | |
1980 | /* Normalize the tag */ | |
d1d4a182 RK |
1981 | w[n] = normalize_tag(w[n] + 4, strlen(w[n] + 4)); |
1982 | istag[n] = 1; | |
a3777123 RK |
1983 | } else { |
1984 | /* Normalize the search term by removing combining characters */ | |
1985 | if(!(w32 = utf8_to_utf32(w[n], strlen(w[n]), &nw32))) | |
1986 | return 0; | |
1987 | nw32 = remove_combining_chars(w32, nw32); | |
1988 | if(!(w[n] = utf32_to_utf8(w32, nw32, 0))) | |
1989 | return 0; | |
d1d4a182 | 1990 | istag[n] = 0; |
a3777123 | 1991 | } |
460b9539 | 1992 | } |
1993 | /* find the longest non-stopword */ | |
1994 | for(n = 0; n < nwordlist; ++n) | |
d1d4a182 | 1995 | if(!istag[n] && !stopword(w[n])) |
460b9539 | 1996 | if(!best || strlen(w[n]) > strlen(best)) |
1997 | best = w[n]; | |
1998 | /* TODO: we should at least in principal be able to identify the word or tag | |
1999 | * with the least matches in log time, and choose that as our primary search | |
2000 | * term. */ | |
2001 | if(ntags && !best) { | |
2002 | /* Only tags are listed. We limit to the first and narrow down with the | |
2003 | * rest. */ | |
d1d4a182 | 2004 | best = istag[0] ? w[0] : 0; |
460b9539 | 2005 | db = trackdb_tagsdb; |
2006 | dbname = "tags"; | |
2007 | } else if(best) { | |
2008 | /* We can limit to some word. */ | |
2009 | db = trackdb_searchdb; | |
2010 | dbname = "search"; | |
2011 | } else { | |
2012 | /* Only stopwords */ | |
2013 | return 0; | |
2014 | } | |
2015 | vector_init(&u); | |
2016 | vector_init(&v); | |
2017 | for(;;) { | |
2018 | tid = trackdb_begin_transaction(); | |
2019 | /* find all the tracks that have that word */ | |
2020 | make_key(&k, best); | |
2021 | prepare_data(&d); | |
2022 | what = DB_SET; | |
2023 | v.nvec = 0; | |
2024 | cursor = trackdb_opencursor(db, tid); | |
2025 | while(!(err = cursor->c_get(cursor, &k, &d, what))) { | |
2026 | vector_append(&v, xstrndup(d.data, d.size)); | |
2027 | what = DB_NEXT_DUP; | |
2028 | } | |
2029 | switch(err) { | |
2030 | case DB_NOTFOUND: | |
2031 | err = 0; | |
2032 | break; | |
2033 | case DB_LOCK_DEADLOCK: | |
2034 | error(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
2035 | break; | |
2036 | default: | |
2037 | fatal(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
2038 | } | |
2039 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
2040 | cursor = 0; | |
2041 | /* do a naive search over that (hopefuly fairly small) list of tracks */ | |
2042 | u.nvec = 0; | |
2043 | for(n = 0; n < v.nvec; ++n) { | |
2044 | if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)) | |
2045 | goto fail; | |
2046 | else if(err) { | |
2047 | error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err)); | |
2048 | continue; | |
2049 | } | |
2050 | twords = track_to_words(v.vec[n], p); | |
2051 | tags = parsetags(kvp_get(p, "tags")); | |
2052 | for(i = 0; i < nwordlist; ++i) { | |
d1d4a182 RK |
2053 | if(istag[i]) { |
2054 | tag = w[i]; | |
460b9539 | 2055 | /* Track must have this tag */ |
2056 | for(j = 0; tags[j]; ++j) | |
2057 | if(!strcmp(tag, tags[j])) break; /* tag found */ | |
2058 | if(!tags[j]) break; /* tag not found */ | |
2059 | } else { | |
2060 | /* Track must contain this word */ | |
2061 | for(j = 0; twords[j]; ++j) | |
2062 | if(!strcmp(w[i], twords[j])) break; /* word found */ | |
2063 | if(!twords[j]) break; /* word not found */ | |
2064 | } | |
2065 | } | |
2066 | if(i >= nwordlist) /* all words found */ | |
2067 | vector_append(&u, v.vec[n]); | |
2068 | } | |
2069 | break; | |
2070 | fail: | |
2071 | trackdb_closecursor(cursor); | |
2072 | cursor = 0; | |
2073 | trackdb_abort_transaction(tid); | |
2074 | info("retrying search"); | |
2075 | } | |
2076 | trackdb_commit_transaction(tid); | |
2077 | vector_terminate(&u); | |
2078 | if(ntracks) | |
2079 | *ntracks = u.nvec; | |
2080 | return u.vec; | |
2081 | } | |
2082 | ||
2083 | /* trackdb_scan **************************************************************/ | |
2084 | ||
2085 | int trackdb_scan(const char *root, | |
2086 | int (*callback)(const char *track, | |
2087 | struct kvp *data, | |
bea6f6d5 | 2088 | struct kvp *prefs, |
460b9539 | 2089 | void *u, |
2090 | DB_TXN *tid), | |
2091 | void *u, | |
2092 | DB_TXN *tid) { | |
2093 | DBC *cursor; | |
bea6f6d5 | 2094 | DBT k, d, pd; |
d1694464 | 2095 | const size_t root_len = root ? strlen(root) : 0; |
2096 | int err, cberr; | |
bea6f6d5 | 2097 | struct kvp *data, *prefs; |
d1694464 | 2098 | const char *track; |
460b9539 | 2099 | |
2100 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
d1694464 | 2101 | if(root) |
2102 | err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d), | |
2103 | DB_SET_RANGE); | |
2104 | else { | |
2105 | memset(&k, 0, sizeof k); | |
2106 | err = cursor->c_get(cursor, &k, prepare_data(&d), | |
2107 | DB_FIRST); | |
2108 | } | |
460b9539 | 2109 | while(!err) { |
d1694464 | 2110 | if(!root |
2111 | || (k.size > root_len | |
2112 | && !strncmp(k.data, root, root_len) | |
2113 | && ((char *)k.data)[root_len] == '/')) { | |
460b9539 | 2114 | data = kvp_urldecode(d.data, d.size); |
d1694464 | 2115 | if(kvp_get(data, "_path")) { |
2116 | track = xstrndup(k.data, k.size); | |
bea6f6d5 RK |
2117 | /* TODO: trackdb_prefsdb is currently a DB_HASH. This means we have to |
2118 | * do a lookup for every single track. In fact this is quite quick: | |
2119 | * with around 10,000 tracks a complete scan is around 0.3s on my | |
2120 | * 2.2GHz Athlon. However, if it were a DB_BTREE, we could do the same | |
2121 | * linear walk as we already do over trackdb_tracksdb, and probably get | |
2122 | * even higher performance. That would require upgrade logic to | |
2123 | * translate old databases though. | |
2124 | */ | |
2125 | switch(err = trackdb_prefsdb->get(trackdb_prefsdb, tid, &k, | |
2126 | prepare_data(&pd), 0)) { | |
2127 | case 0: | |
2128 | prefs = kvp_urldecode(pd.data, pd.size); | |
2129 | break; | |
2130 | case DB_NOTFOUND: | |
2131 | prefs = 0; | |
2132 | break; | |
2133 | case DB_LOCK_DEADLOCK: | |
2134 | error(0, "getting prefs: %s", db_strerror(err)); | |
2135 | trackdb_closecursor(cursor); | |
2136 | return err; | |
2137 | default: | |
2138 | fatal(0, "getting prefs: %s", db_strerror(err)); | |
2139 | } | |
d1694464 | 2140 | /* Advance to the next track before the callback so that the callback |
2141 | * may safely delete the track */ | |
2142 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
bea6f6d5 | 2143 | if((cberr = callback(track, data, prefs, u, tid))) { |
d1694464 | 2144 | err = cberr; |
460b9539 | 2145 | break; |
d1694464 | 2146 | } |
2147 | } else | |
2148 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
460b9539 | 2149 | } else |
2150 | break; | |
2151 | } | |
2152 | trackdb_closecursor(cursor); | |
2153 | switch(err) { | |
2154 | case EINTR: | |
2155 | return err; | |
2156 | case 0: | |
2157 | case DB_NOTFOUND: | |
2158 | return 0; | |
2159 | case DB_LOCK_DEADLOCK: | |
2160 | error(0, "c->c_get: %s", db_strerror(err)); | |
2161 | return err; | |
2162 | default: | |
2163 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
2164 | } | |
2165 | } | |
2166 | ||
2167 | /* trackdb_rescan ************************************************************/ | |
2168 | ||
dd9af5cb RK |
2169 | /** @brief Node in the list of rescan-complete callbacks */ |
2170 | struct rescanned_node { | |
2171 | struct rescanned_node *next; | |
2172 | void (*rescanned)(void *ru); | |
2173 | void *ru; | |
2174 | }; | |
2175 | ||
2176 | /** @brief List of rescan-complete callbacks */ | |
2177 | static struct rescanned_node *rescanned_list; | |
2178 | ||
2179 | /** @brief Add a rescan completion callback */ | |
2180 | void trackdb_add_rescanned(void (*rescanned)(void *ru), | |
2181 | void *ru) { | |
2182 | if(rescanned) { | |
2183 | struct rescanned_node *n = xmalloc(sizeof *n); | |
2184 | n->next = rescanned_list; | |
2185 | n->rescanned = rescanned; | |
2186 | n->ru = ru; | |
2187 | rescanned_list = n; | |
2188 | } | |
2189 | } | |
2190 | ||
460b9539 | 2191 | /* called when the rescanner terminates */ |
2192 | static int reap_rescan(ev_source attribute((unused)) *ev, | |
2193 | pid_t pid, | |
2194 | int status, | |
2195 | const struct rusage attribute((unused)) *rusage, | |
2196 | void attribute((unused)) *u) { | |
2197 | if(pid == rescan_pid) rescan_pid = -1; | |
2198 | if(status) | |
c0bcd134 | 2199 | error(0, RESCAN": %s", wstat(status)); |
460b9539 | 2200 | else |
c0bcd134 | 2201 | D((RESCAN" terminated: %s", wstat(status))); |
460b9539 | 2202 | /* Our cache of file lookups is out of date now */ |
2203 | cache_clean(&cache_files_type); | |
e025abff | 2204 | eventlog("rescanned", (char *)0); |
dd9af5cb RK |
2205 | /* Call rescanned callbacks */ |
2206 | while(rescanned_list) { | |
fdbb860d | 2207 | void (*rescanned)(void *u_) = rescanned_list->rescanned; |
dd9af5cb RK |
2208 | void *ru = rescanned_list->ru; |
2209 | ||
2210 | rescanned_list = rescanned_list->next; | |
2211 | rescanned(ru); | |
2212 | } | |
460b9539 | 2213 | return 0; |
2214 | } | |
2215 | ||
ffac51d7 RK |
2216 | /** @brief Initiate a rescan |
2217 | * @param ev Event loop or 0 to block | |
0590cedc | 2218 | * @param recheck 1 to recheck lengths, 0 to suppress check |
dd9af5cb RK |
2219 | * @param rescanned Called on completion (if not NULL) |
2220 | * @param u Passed to @p rescanned | |
ffac51d7 | 2221 | */ |
dd9af5cb RK |
2222 | void trackdb_rescan(ev_source *ev, int recheck, |
2223 | void (*rescanned)(void *ru), | |
2224 | void *ru) { | |
1a4a6350 | 2225 | int w; |
c0bcd134 | 2226 | |
460b9539 | 2227 | if(rescan_pid != -1) { |
dd9af5cb | 2228 | trackdb_add_rescanned(rescanned, ru); |
460b9539 | 2229 | error(0, "rescan already underway"); |
2230 | return; | |
2231 | } | |
ffac51d7 | 2232 | rescan_pid = subprogram(ev, -1, RESCAN, |
3d2988f6 | 2233 | recheck ? "--check" : "--no-check", |
ffac51d7 | 2234 | (char *)0); |
dd9af5cb | 2235 | trackdb_add_rescanned(rescanned, ru); |
1a4a6350 RK |
2236 | if(ev) { |
2237 | ev_child(ev, rescan_pid, 0, reap_rescan, 0); | |
2238 | D(("started rescanner")); | |
2239 | } else { | |
2240 | /* This is the first rescan, we block until it is complete */ | |
2241 | while(waitpid(rescan_pid, &w, 0) < 0 && errno == EINTR) | |
2242 | ; | |
2243 | reap_rescan(0, rescan_pid, w, 0, 0); | |
2244 | } | |
460b9539 | 2245 | } |
2246 | ||
2247 | int trackdb_rescan_cancel(void) { | |
2248 | if(rescan_pid == -1) return 0; | |
2249 | if(kill(rescan_pid, SIGTERM) < 0) | |
2250 | fatal(errno, "error killing rescanner"); | |
2251 | rescan_pid = -1; | |
2252 | return 1; | |
2253 | } | |
2254 | ||
dd9af5cb RK |
2255 | /** @brief Return true if a rescan is underway */ |
2256 | int trackdb_rescan_underway(void) { | |
2257 | return rescan_pid != -1; | |
2258 | } | |
2259 | ||
460b9539 | 2260 | /* global prefs **************************************************************/ |
2261 | ||
2262 | void trackdb_set_global(const char *name, | |
2263 | const char *value, | |
2264 | const char *who) { | |
2265 | DB_TXN *tid; | |
460b9539 | 2266 | int err; |
2267 | int state; | |
2268 | ||
460b9539 | 2269 | for(;;) { |
2270 | tid = trackdb_begin_transaction(); | |
f9635e06 RK |
2271 | if(!(err = trackdb_set_global_tid(name, value, tid))) |
2272 | break; | |
460b9539 | 2273 | trackdb_abort_transaction(tid); |
2274 | } | |
2275 | trackdb_commit_transaction(tid); | |
2276 | /* log important state changes */ | |
2277 | if(!strcmp(name, "playing")) { | |
2278 | state = !value || !strcmp(value, "yes"); | |
2279 | info("playing %s by %s", | |
2280 | state ? "enabled" : "disabled", | |
2281 | who ? who : "-"); | |
2282 | eventlog("state", state ? "enable_play" : "disable_play", (char *)0); | |
2283 | } | |
2284 | if(!strcmp(name, "random-play")) { | |
2285 | state = !value || !strcmp(value, "yes"); | |
2286 | info("random play %s by %s", | |
2287 | state ? "enabled" : "disabled", | |
2288 | who ? who : "-"); | |
2289 | eventlog("state", state ? "enable_random" : "disable_random", (char *)0); | |
2290 | } | |
460b9539 | 2291 | } |
2292 | ||
f9635e06 RK |
2293 | int trackdb_set_global_tid(const char *name, |
2294 | const char *value, | |
2295 | DB_TXN *tid) { | |
2296 | DBT k, d; | |
2297 | int err; | |
2298 | ||
2299 | memset(&k, 0, sizeof k); | |
2300 | memset(&d, 0, sizeof d); | |
2301 | k.data = (void *)name; | |
2302 | k.size = strlen(name); | |
2303 | if(value) { | |
2304 | d.data = (void *)value; | |
2305 | d.size = strlen(value); | |
2306 | } | |
2307 | if(value) | |
2308 | err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0); | |
2309 | else | |
2310 | err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0); | |
2311 | if(err == DB_LOCK_DEADLOCK) return err; | |
2312 | if(err) | |
2313 | fatal(0, "error updating database: %s", db_strerror(err)); | |
2314 | return 0; | |
2315 | } | |
2316 | ||
460b9539 | 2317 | const char *trackdb_get_global(const char *name) { |
2318 | DB_TXN *tid; | |
2319 | int err; | |
2320 | const char *r; | |
2321 | ||
2322 | for(;;) { | |
2323 | tid = trackdb_begin_transaction(); | |
2324 | if(!(err = trackdb_get_global_tid(name, tid, &r))) | |
2325 | break; | |
2326 | trackdb_abort_transaction(tid); | |
2327 | } | |
2328 | trackdb_commit_transaction(tid); | |
2329 | return r; | |
2330 | } | |
2331 | ||
f9635e06 RK |
2332 | int trackdb_get_global_tid(const char *name, |
2333 | DB_TXN *tid, | |
2334 | const char **rp) { | |
460b9539 | 2335 | DBT k, d; |
2336 | int err; | |
2337 | ||
2338 | memset(&k, 0, sizeof k); | |
2339 | k.data = (void *)name; | |
2340 | k.size = strlen(name); | |
2341 | switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k, | |
2342 | prepare_data(&d), 0)) { | |
2343 | case 0: | |
2344 | *rp = xstrndup(d.data, d.size); | |
2345 | return 0; | |
2346 | case DB_NOTFOUND: | |
2347 | *rp = 0; | |
2348 | return 0; | |
2349 | case DB_LOCK_DEADLOCK: | |
2350 | return err; | |
2351 | default: | |
f9635e06 | 2352 | fatal(0, "error reading database: %s", db_strerror(err)); |
460b9539 | 2353 | } |
2354 | } | |
2355 | ||
2a10b70b RK |
2356 | /** @brief Retrieve the most recently added tracks |
2357 | * @param ntracksp Where to put count, or 0 | |
2358 | * @param maxtracks Maximum number of tracks to retrieve | |
2359 | * @return null-terminated array of track names | |
2360 | * | |
2361 | * The most recently added track is first in the array. | |
2362 | */ | |
2363 | char **trackdb_new(int *ntracksp, | |
2364 | int maxtracks) { | |
2365 | DB_TXN *tid; | |
2366 | char **tracks; | |
2367 | ||
2368 | for(;;) { | |
2369 | tid = trackdb_begin_transaction(); | |
2370 | tracks = trackdb_new_tid(ntracksp, maxtracks, tid); | |
2371 | if(tracks) | |
2372 | break; | |
2373 | trackdb_abort_transaction(tid); | |
2374 | } | |
2375 | trackdb_commit_transaction(tid); | |
2376 | return tracks; | |
2377 | } | |
2378 | ||
2379 | /** @brief Retrieve the most recently added tracks | |
2380 | * @param ntracksp Where to put count, or 0 | |
2381 | * @param maxtracks Maximum number of tracks to retrieve, or 0 for all | |
2382 | * @param tid Transaction ID | |
2383 | * @return null-terminated array of track names, or NULL on deadlock | |
2384 | * | |
2385 | * The most recently added track is first in the array. | |
2386 | */ | |
2387 | static char **trackdb_new_tid(int *ntracksp, | |
2388 | int maxtracks, | |
2389 | DB_TXN *tid) { | |
2390 | DBC *c; | |
2391 | DBT k, d; | |
2392 | int err = 0; | |
2393 | struct vector tracks[1]; | |
2394 | ||
2395 | vector_init(tracks); | |
2396 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
2397 | while((maxtracks <= 0 || tracks->nvec < maxtracks) | |
2398 | && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV))) | |
2399 | vector_append(tracks, xstrndup(d.data, d.size)); | |
2400 | switch(err) { | |
2401 | case 0: /* hit maxtracks */ | |
2402 | case DB_NOTFOUND: /* ran out of tracks */ | |
2403 | break; | |
2404 | case DB_LOCK_DEADLOCK: | |
2405 | trackdb_closecursor(c); | |
2406 | return 0; | |
2407 | default: | |
2408 | fatal(0, "error reading noticed.db: %s", db_strerror(err)); | |
2409 | } | |
2410 | if((err = trackdb_closecursor(c))) | |
2411 | return 0; /* deadlock */ | |
2412 | vector_terminate(tracks); | |
2413 | if(ntracksp) | |
2414 | *ntracksp = tracks->nvec; | |
2415 | return tracks->vec; | |
2416 | } | |
2417 | ||
1e64e9fb RK |
2418 | /** @brief Expire noticed.db |
2419 | * @param earliest Earliest timestamp to keep | |
2420 | */ | |
2421 | void trackdb_expire_noticed(time_t earliest) { | |
2422 | DB_TXN *tid; | |
2423 | ||
2424 | for(;;) { | |
2425 | tid = trackdb_begin_transaction(); | |
2426 | if(!trackdb_expire_noticed_tid(earliest, tid)) | |
2427 | break; | |
2428 | trackdb_abort_transaction(tid); | |
2429 | } | |
2430 | trackdb_commit_transaction(tid); | |
2431 | } | |
2432 | ||
2433 | /** @brief Expire noticed.db | |
2434 | * @param earliest Earliest timestamp to keep | |
2435 | * @param tid Transaction ID | |
2436 | * @return 0 or DB_LOCK_DEADLOCK | |
2437 | */ | |
2438 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) { | |
2439 | DBC *c; | |
2440 | DBT k, d; | |
2441 | int err = 0, ret; | |
2442 | time_t when; | |
2443 | uint32_t *kk; | |
2444 | int count = 0; | |
2445 | ||
2446 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
2447 | while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) { | |
2448 | kk = k.data; | |
2449 | when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1])); | |
2450 | if(when >= earliest) | |
2451 | break; | |
2452 | if((err = c->c_del(c, 0))) { | |
2453 | if(err != DB_LOCK_DEADLOCK) | |
2454 | fatal(0, "error deleting expired noticed.db entry: %s", | |
2455 | db_strerror(err)); | |
2456 | break; | |
2457 | } | |
2458 | ++count; | |
2459 | } | |
2460 | if(err == DB_NOTFOUND) | |
2461 | err = 0; | |
2462 | if(err && err != DB_LOCK_DEADLOCK) | |
2463 | fatal(0, "error expiring noticed.db: %s", db_strerror(err)); | |
2464 | ret = err; | |
2465 | if((err = trackdb_closecursor(c))) { | |
2466 | if(err != DB_LOCK_DEADLOCK) | |
2467 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
2468 | ret = err; | |
2469 | } | |
2470 | if(!ret && count) | |
2471 | info("expired %d tracks from noticed.db", count); | |
2472 | return ret; | |
2473 | } | |
2474 | ||
460b9539 | 2475 | /* tidying up ****************************************************************/ |
2476 | ||
2477 | void trackdb_gc(void) { | |
2478 | int err; | |
2479 | char **logfiles; | |
2480 | ||
2481 | if((err = trackdb_env->txn_checkpoint(trackdb_env, | |
2482 | config->checkpoint_kbyte, | |
2483 | config->checkpoint_min, | |
2484 | 0))) | |
2485 | fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err)); | |
2486 | if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE))) | |
2487 | fatal(0, "trackdb_env->log_archive: %s", db_strerror(err)); | |
2488 | /* This makes catastrophic recovery impossible. However, the user can still | |
2489 | * preserve the important data by using disorder-dump to snapshot their | |
2490 | * prefs, and later to restore it. This is likely to have much small | |
2491 | * long-term storage requirements than record the db logfiles. */ | |
2492 | } | |
2493 | ||
f0feb22e RK |
2494 | /* user database *************************************************************/ |
2495 | ||
2496 | /** @brief Return true if @p user is trusted */ | |
2497 | static int trusted(const char *user) { | |
2498 | int n; | |
2499 | ||
2500 | for(n = 0; (n < config->trust.n | |
2501 | && strcmp(config->trust.s[n], user)); ++n) | |
2502 | ; | |
2503 | return n < config->trust.n; | |
2504 | } | |
2505 | ||
ba39faf6 RK |
2506 | /** @brief Return non-zero for a valid username |
2507 | * | |
2508 | * Currently we only allow the letters and digits in ASCII. We could be more | |
2509 | * liberal than this but it is a nice simple test. It is critical that | |
2510 | * semicolons are never allowed. | |
2511 | */ | |
2512 | static int valid_username(const char *user) { | |
2513 | if(!*user) | |
2514 | return 0; | |
2515 | while(*user) { | |
2516 | const uint8_t c = *user++; | |
2517 | /* For now we are very strict */ | |
2518 | if((c >= 'a' && c <= 'z') | |
2519 | || (c >= 'A' && c <= 'Z') | |
2520 | || (c >= '0' && c <= '9')) | |
2521 | /* ok */; | |
2522 | else | |
2523 | return 0; | |
2524 | } | |
2525 | return 1; | |
2526 | } | |
2527 | ||
f0feb22e RK |
2528 | /** @brief Add a user */ |
2529 | static int create_user(const char *user, | |
2530 | const char *password, | |
2531 | const char *rights, | |
2532 | const char *email, | |
ba39faf6 | 2533 | const char *confirmation, |
f0feb22e RK |
2534 | DB_TXN *tid, |
2535 | uint32_t flags) { | |
2536 | struct kvp *k = 0; | |
2537 | char s[64]; | |
2538 | ||
ba39faf6 RK |
2539 | /* sanity check user */ |
2540 | if(!valid_username(user)) { | |
2541 | error(0, "invalid username '%s'", user); | |
2542 | return -1; | |
2543 | } | |
0f55e905 RK |
2544 | if(parse_rights(rights, 0, 1)) { |
2545 | error(0, "invalid rights string"); | |
2546 | return -1; | |
2547 | } | |
f0feb22e RK |
2548 | /* data for this user */ |
2549 | if(password) | |
2550 | kvp_set(&k, "password", password); | |
2551 | kvp_set(&k, "rights", rights); | |
2552 | if(email) | |
2553 | kvp_set(&k, "email", email); | |
ba39faf6 RK |
2554 | if(confirmation) |
2555 | kvp_set(&k, "confirmation", confirmation); | |
f0feb22e RK |
2556 | snprintf(s, sizeof s, "%jd", (intmax_t)time(0)); |
2557 | kvp_set(&k, "created", s); | |
2558 | return trackdb_putdata(trackdb_usersdb, user, k, tid, flags); | |
2559 | } | |
2560 | ||
2561 | /** @brief Add one pre-existing user */ | |
2562 | static int one_old_user(const char *user, const char *password, | |
2563 | DB_TXN *tid) { | |
2564 | const char *rights; | |
2565 | ||
2566 | /* www-data doesn't get added */ | |
2567 | if(!strcmp(user, "www-data")) { | |
2568 | info("not adding www-data to user database"); | |
2569 | return 0; | |
2570 | } | |
2571 | /* pick rights */ | |
2572 | if(!strcmp(user, "root")) | |
2573 | rights = "all"; | |
0f55e905 RK |
2574 | else if(trusted(user)) { |
2575 | rights_type r; | |
2576 | ||
2577 | parse_rights(config->default_rights, &r, 1); | |
fce810c2 | 2578 | r &= ~(rights_type)(RIGHT_SCRATCH__MASK|RIGHT_MOVE__MASK|RIGHT_REMOVE__MASK); |
0f55e905 RK |
2579 | r |= (RIGHT_ADMIN|RIGHT_RESCAN |
2580 | |RIGHT_SCRATCH_ANY|RIGHT_MOVE_ANY|RIGHT_REMOVE_ANY); | |
2581 | rights = rights_string(r); | |
2582 | } else | |
2583 | rights = config->default_rights; | |
ba39faf6 RK |
2584 | return create_user(user, password, rights, 0/*email*/, 0/*confirmation*/, |
2585 | tid, DB_NOOVERWRITE); | |
f0feb22e RK |
2586 | } |
2587 | ||
2588 | static int trackdb_old_users_tid(DB_TXN *tid) { | |
2589 | int n; | |
2590 | ||
2591 | for(n = 0; n < config->allow.n; ++n) { | |
2592 | switch(one_old_user(config->allow.s[n].s[0], config->allow.s[n].s[1], | |
2593 | tid)) { | |
2594 | case 0: | |
2595 | info("created user %s from 'allow' directive", config->allow.s[n].s[0]); | |
2596 | break; | |
2597 | case DB_KEYEXIST: | |
2598 | error(0, "user %s already exists, delete 'allow' directive", | |
2599 | config->allow.s[n].s[0]); | |
2600 | /* This won't ever become fatal - eventually 'allow' will be | |
2601 | * disabled. */ | |
2602 | break; | |
2603 | case DB_LOCK_DEADLOCK: | |
2604 | return DB_LOCK_DEADLOCK; | |
2605 | } | |
2606 | } | |
2607 | return 0; | |
2608 | } | |
2609 | ||
2610 | /** @brief Read old 'allow' directives and copy them to the users database */ | |
2611 | void trackdb_old_users(void) { | |
2612 | int e; | |
2613 | ||
2614 | if(config->allow.n) | |
2615 | WITH_TRANSACTION(trackdb_old_users_tid(tid)); | |
2616 | } | |
2617 | ||
2618 | /** @brief Create a root user in the user database if there is none */ | |
2619 | void trackdb_create_root(void) { | |
2620 | int e; | |
2621 | uint8_t pwbin[12]; | |
2622 | char *pw; | |
2623 | ||
2624 | /* Choose a new root password */ | |
2625 | gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM); | |
2626 | pw = mime_to_base64(pwbin, sizeof pwbin); | |
2627 | /* Create the root user if it does not exist */ | |
ba39faf6 RK |
2628 | WITH_TRANSACTION(create_user("root", pw, "all", |
2629 | 0/*email*/, 0/*confirmation*/, | |
2630 | tid, DB_NOOVERWRITE)); | |
f0feb22e RK |
2631 | if(e == 0) |
2632 | info("created root user"); | |
2633 | } | |
2634 | ||
2635 | /** @brief Find a user's password from the database | |
2636 | * @param user Username | |
2637 | * @return Password or NULL | |
2638 | * | |
2639 | * Only works if running as a user that can read the database! | |
2640 | * | |
2641 | * If the user exists but has no password, "" is returned. | |
2642 | */ | |
2643 | const char *trackdb_get_password(const char *user) { | |
2644 | int e; | |
2645 | struct kvp *k; | |
2646 | const char *password; | |
2647 | ||
2648 | WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid)); | |
2649 | if(e) | |
2650 | return 0; | |
2651 | password = kvp_get(k, "password"); | |
2652 | return password ? password : ""; | |
2653 | } | |
2654 | ||
2655 | /** @brief Add a new user | |
2656 | * @param user Username | |
2657 | * @param password Password or NULL | |
2658 | * @param rights Initial rights | |
158d0961 | 2659 | * @param email Email address or NULL |
2660 | * @param confirmation Confirmation string or NULL | |
f0feb22e RK |
2661 | * @return 0 on success, non-0 on error |
2662 | */ | |
2663 | int trackdb_adduser(const char *user, | |
2664 | const char *password, | |
0f55e905 | 2665 | const char *rights, |
ba39faf6 RK |
2666 | const char *email, |
2667 | const char *confirmation) { | |
f0feb22e | 2668 | int e; |
f0feb22e | 2669 | |
0f55e905 | 2670 | WITH_TRANSACTION(create_user(user, password, rights, email, confirmation, |
f0feb22e RK |
2671 | tid, DB_NOOVERWRITE)); |
2672 | if(e) { | |
9c722791 | 2673 | error(0, "cannot create user '%s' because they already exist", user); |
f0feb22e RK |
2674 | return -1; |
2675 | } else { | |
2676 | if(email) | |
2677 | info("created user '%s' with rights '%s' and email address '%s'", | |
0f55e905 | 2678 | user, rights, email); |
f0feb22e | 2679 | else |
0f55e905 | 2680 | info("created user '%s' with rights '%s'", user, rights); |
f0feb22e RK |
2681 | return 0; |
2682 | } | |
2683 | } | |
2684 | ||
2685 | /** @brief Delete a user | |
2686 | * @param user User to delete | |
158d0961 | 2687 | * @return 0 on success, non-0 if the user didn't exist anyway |
f0feb22e RK |
2688 | */ |
2689 | int trackdb_deluser(const char *user) { | |
2690 | int e; | |
2691 | ||
2692 | WITH_TRANSACTION(trackdb_delkey(trackdb_usersdb, user, tid)); | |
2693 | if(e) { | |
2694 | error(0, "cannot delete user '%s' because they do not exist", user); | |
2695 | return -1; | |
2696 | } | |
2697 | info("deleted user '%s'", user); | |
2698 | return 0; | |
2699 | } | |
2700 | ||
2701 | /** @brief Get user information | |
2702 | * @param user User to query | |
2703 | * @return Linked list of user information or NULL if user does not exist | |
2704 | * | |
2705 | * Every user has at least a @c rights entry so NULL can be used to mean no | |
2706 | * such user safely. | |
2707 | */ | |
2708 | struct kvp *trackdb_getuserinfo(const char *user) { | |
2709 | int e; | |
2710 | struct kvp *k; | |
2711 | ||
2712 | WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid)); | |
2713 | if(e) | |
2714 | return 0; | |
2715 | else | |
2716 | return k; | |
2717 | } | |
2718 | ||
2719 | /** @brief Edit user information | |
2720 | * @param user User to edit | |
2721 | * @param key Key to change | |
2722 | * @param value Value to set, or NULL to remove | |
2723 | * @param tid Transaction ID | |
2724 | * @return 0, DB_LOCK_DEADLOCK or DB_NOTFOUND | |
2725 | */ | |
2726 | static int trackdb_edituserinfo_tid(const char *user, const char *key, | |
2727 | const char *value, DB_TXN *tid) { | |
2728 | struct kvp *k; | |
2729 | int e; | |
2730 | ||
2731 | if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid))) | |
2732 | return e; | |
2733 | if(!kvp_set(&k, key, value)) | |
2734 | return 0; /* no change */ | |
2735 | return trackdb_putdata(trackdb_usersdb, user, k, tid, 0); | |
2736 | } | |
2737 | ||
2738 | /** @brief Edit user information | |
2739 | * @param user User to edit | |
2740 | * @param key Key to change | |
2741 | * @param value Value to set, or NULL to remove | |
2742 | * @return 0 on success, non-0 on error | |
2743 | */ | |
2744 | int trackdb_edituserinfo(const char *user, | |
2745 | const char *key, const char *value) { | |
2746 | int e; | |
2747 | ||
5df73aeb RK |
2748 | if(!strcmp(key, "rights")) { |
2749 | if(!value) { | |
2750 | error(0, "cannot remove 'rights' key from user '%s'", user); | |
2751 | return -1; | |
2752 | } | |
0f55e905 | 2753 | if(parse_rights(value, 0, 1)) { |
5df73aeb RK |
2754 | error(0, "invalid rights string"); |
2755 | return -1; | |
2756 | } | |
2757 | } else if(!strcmp(key, "email")) { | |
0517868c RK |
2758 | if(*value) { |
2759 | if(!strchr(value, '@')) { | |
2760 | error(0, "invalid email address '%s' for user '%s'", user, value); | |
2761 | return -1; | |
2762 | } | |
2763 | } else | |
2764 | value = 0; /* no email -> remove key */ | |
5df73aeb RK |
2765 | } else if(!strcmp(key, "created")) { |
2766 | error(0, "cannot change creation date for user '%s'", user); | |
2767 | return -1; | |
2768 | } else if(strcmp(key, "password") | |
2769 | && !strcmp(key, "confirmation")) { | |
2770 | error(0, "unknown user info key '%s' for user '%s'", key, user); | |
2771 | return -1; | |
2772 | } | |
f0feb22e | 2773 | WITH_TRANSACTION(trackdb_edituserinfo_tid(user, key, value, tid)); |
5df73aeb RK |
2774 | if(e) { |
2775 | error(0, "unknown user '%s'", user); | |
f0feb22e | 2776 | return -1; |
5df73aeb | 2777 | } else |
f0feb22e RK |
2778 | return 0; |
2779 | } | |
2780 | ||
c3be4f19 RK |
2781 | /** @brief List all users |
2782 | * @return NULL-terminated list of users | |
2783 | */ | |
2784 | char **trackdb_listusers(void) { | |
2785 | int e; | |
2786 | struct vector v[1]; | |
2787 | ||
2788 | vector_init(v); | |
2789 | WITH_TRANSACTION(trackdb_listkeys(trackdb_usersdb, v, tid)); | |
2790 | return v->vec; | |
2791 | } | |
2792 | ||
30365519 | 2793 | /** @brief Confirm a user registration |
2794 | * @param user Username | |
2795 | * @param confirmation Confirmation string | |
2796 | * @param rightsp Where to put user rights | |
2797 | * @param tid Transaction ID | |
2798 | * @return 0 on success, non-0 on error | |
2799 | */ | |
ba39faf6 | 2800 | static int trackdb_confirm_tid(const char *user, const char *confirmation, |
30365519 | 2801 | rights_type *rightsp, |
ba39faf6 RK |
2802 | DB_TXN *tid) { |
2803 | const char *stored_confirmation; | |
2804 | struct kvp *k; | |
2805 | int e; | |
30365519 | 2806 | const char *rights; |
ba39faf6 RK |
2807 | |
2808 | if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid))) | |
2809 | return e; | |
2810 | if(!(stored_confirmation = kvp_get(k, "confirmation"))) { | |
2811 | error(0, "already confirmed user '%s'", user); | |
2812 | /* DB claims -30,800 to -30,999 so -1 should be a safe bet */ | |
2813 | return -1; | |
2814 | } | |
30365519 | 2815 | if(!(rights = kvp_get(k, "rights"))) { |
2816 | error(0, "no rights for unconfirmed user '%s'", user); | |
2817 | return -1; | |
2818 | } | |
2819 | if(parse_rights(rights, rightsp, 1)) | |
2820 | return -1; | |
ba39faf6 RK |
2821 | if(strcmp(confirmation, stored_confirmation)) { |
2822 | error(0, "wrong confirmation string for user '%s'", user); | |
2823 | return -1; | |
2824 | } | |
2825 | /* 'sall good */ | |
2826 | kvp_set(&k, "confirmation", 0); | |
2827 | return trackdb_putdata(trackdb_usersdb, user, k, tid, 0); | |
2828 | } | |
2829 | ||
2830 | /** @brief Confirm a user registration | |
2831 | * @param user Username | |
2832 | * @param confirmation Confirmation string | |
30365519 | 2833 | * @param rightsp Where to put user rights |
ba39faf6 RK |
2834 | * @return 0 on success, non-0 on error |
2835 | */ | |
30365519 | 2836 | int trackdb_confirm(const char *user, const char *confirmation, |
2837 | rights_type *rightsp) { | |
ba39faf6 RK |
2838 | int e; |
2839 | ||
30365519 | 2840 | WITH_TRANSACTION(trackdb_confirm_tid(user, confirmation, rightsp, tid)); |
ba39faf6 RK |
2841 | switch(e) { |
2842 | case 0: | |
2843 | info("registration confirmed for user '%s'", user); | |
2844 | return 0; | |
2845 | case DB_NOTFOUND: | |
2846 | error(0, "confirmation for nonexistent user '%s'", user); | |
2847 | return -1; | |
2848 | default: /* already reported */ | |
2849 | return -1; | |
2850 | } | |
2851 | } | |
2852 | ||
460b9539 | 2853 | /* |
2854 | Local Variables: | |
2855 | c-basic-offset:2 | |
2856 | comment-column:40 | |
2857 | fill-column:79 | |
2858 | indent-tabs-mode:nil | |
2859 | End: | |
2860 | */ |