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 | |
26 | #include <config.h> | |
27 | #include "types.h" | |
28 | ||
29 | #include <string.h> | |
30 | #include <stdio.h> | |
31 | #include <db.h> | |
32 | #include <sys/socket.h> | |
33 | #include <pcre.h> | |
34 | #include <assert.h> | |
35 | #include <unistd.h> | |
36 | #include <errno.h> | |
37 | #include <stddef.h> | |
38 | #include <sys/time.h> | |
39 | #include <sys/resource.h> | |
40 | #include <time.h> | |
2a10b70b | 41 | #include <arpa/inet.h> |
ad2f8275 | 42 | #include <sys/wait.h> |
a745dd43 RK |
43 | #include <dirent.h> |
44 | #include <sys/stat.h> | |
f0feb22e | 45 | #include <gcrypt.h> |
460b9539 | 46 | |
47 | #include "event.h" | |
48 | #include "mem.h" | |
49 | #include "kvp.h" | |
50 | #include "log.h" | |
51 | #include "vector.h" | |
5df73aeb | 52 | #include "rights.h" |
460b9539 | 53 | #include "trackdb.h" |
54 | #include "configuration.h" | |
55 | #include "syscalls.h" | |
56 | #include "wstat.h" | |
460b9539 | 57 | #include "printf.h" |
58 | #include "filepart.h" | |
59 | #include "trackname.h" | |
60 | #include "trackdb-int.h" | |
61 | #include "logfd.h" | |
62 | #include "cache.h" | |
63 | #include "eventlog.h" | |
64 | #include "hash.h" | |
c85b7022 RK |
65 | #include "unicode.h" |
66 | #include "unidata.h" | |
fce810c2 | 67 | #include "base64.h" |
460b9539 | 68 | |
69 | #define RESCAN "disorder-rescan" | |
70 | #define DEADLOCK "disorder-deadlock" | |
71 | ||
72 | static const char *getpart(const char *track, | |
73 | const char *context, | |
74 | const char *part, | |
75 | const struct kvp *p, | |
76 | int *used_db); | |
2a10b70b RK |
77 | static char **trackdb_new_tid(int *ntracksp, |
78 | int maxtracks, | |
79 | DB_TXN *tid); | |
1e64e9fb | 80 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid); |
a3777123 | 81 | static char *normalize_tag(const char *s, size_t ns); |
460b9539 | 82 | |
83 | const struct cache_type cache_files_type = { 86400 }; | |
84 | unsigned long cache_files_hits, cache_files_misses; | |
85 | ||
f982b120 RK |
86 | /** @brief Set by trackdb_open() */ |
87 | int trackdb_existing_database; | |
88 | ||
460b9539 | 89 | /* setup and teardown ********************************************************/ |
90 | ||
91 | static const char *home; /* home had better not change */ | |
92 | DB_ENV *trackdb_env; /* db environment */ | |
f9635e06 RK |
93 | |
94 | /** @brief The tracks database | |
95 | * - Keys are UTF-8(NFC(unicode(path name))) | |
96 | * - Values are encoded key-value pairs | |
97 | * - Data is reconstructable data about tracks that currently exist | |
98 | */ | |
99 | DB *trackdb_tracksdb; | |
100 | ||
101 | /** @brief The preferences database | |
102 | * | |
103 | * - Keys are UTF-8(NFC(unicode(path name))) | |
104 | * - Values are encoded key-value pairs | |
105 | * - Data is user data about tracks (that might not exist any more) | |
106 | * and cannot be reconstructed | |
107 | */ | |
108 | DB *trackdb_prefsdb; | |
109 | ||
110 | /** @brief The search database | |
111 | * | |
112 | * - Keys are UTF-8(NFKC(casefold(search term))) | |
113 | * - Values are UTF-8(NFC(unicode(path name))) | |
114 | * - There can be more than one value per key | |
115 | * - Presence of key,value means that path matches the search terms | |
158d0961 | 116 | * - Only tracks fond in @ref trackdb_tracksdb are represented here |
f9635e06 RK |
117 | * - This database can be reconstructed, it contains no user data |
118 | */ | |
119 | DB *trackdb_searchdb; | |
120 | ||
121 | /** @brief The tags database | |
122 | * | |
123 | * - Keys are UTF-8(NFKC(casefold(tag))) | |
124 | * - Values are UTF-8(NFC(unicode(path name))) | |
125 | * - There can be more than one value per key | |
126 | * - Presence of key,value means that path matches the tag | |
127 | * - This is always in sync with the tags preference | |
128 | * - This database can be reconstructed, it contains no user data | |
129 | */ | |
460b9539 | 130 | DB *trackdb_tagsdb; /* the tags database */ |
f9635e06 RK |
131 | |
132 | /** @brief The global preferences database | |
133 | * - Keys are UTF-8(NFC(preference)) | |
134 | * - Values are global preference values | |
135 | * - Data is user data and cannot be reconstructed | |
136 | */ | |
460b9539 | 137 | DB *trackdb_globaldb; /* global preferences */ |
f9635e06 RK |
138 | |
139 | /** @brief The noticed database | |
140 | * - Keys are 64-bit big-endian timestamps | |
141 | * - Values are UTF-8(NFC(unicode(path name))) | |
142 | * - There can be more than one value per key | |
143 | * - Presence of key,value means that path was added at the given time | |
144 | * - Data cannot be reconstructed (but isn't THAT important) | |
145 | */ | |
2a10b70b | 146 | DB *trackdb_noticeddb; /* when track noticed */ |
a745dd43 | 147 | |
fdca70ee RK |
148 | /** @brief The schedule database |
149 | * | |
150 | * - Keys are ID strings, generated at random | |
151 | * - Values are encoded key-value pairs | |
152 | * - There can be more than one value per key | |
153 | * - Data cannot be reconstructed | |
154 | * | |
155 | * See @ref server/schedule.c for further information. | |
156 | */ | |
157 | DB *trackdb_scheduledb; | |
158 | ||
a745dd43 RK |
159 | /** @brief The user database |
160 | * - Keys are usernames | |
161 | * - Values are encoded key-value pairs | |
162 | * - Data is user data and cannot be reconstructed | |
163 | */ | |
164 | DB *trackdb_usersdb; | |
165 | ||
460b9539 | 166 | static pid_t db_deadlock_pid = -1; /* deadlock manager PID */ |
167 | static pid_t rescan_pid = -1; /* rescanner PID */ | |
168 | static int initialized, opened; /* state */ | |
169 | ||
460b9539 | 170 | /* comparison function for keys */ |
171 | static int compare(DB attribute((unused)) *db_, | |
172 | const DBT *a, const DBT *b) { | |
173 | return compare_path_raw(a->data, a->size, b->data, b->size); | |
174 | } | |
175 | ||
199c2a23 RK |
176 | /** @brief Test whether the track database can be read |
177 | * @return 1 if it can, 0 if it cannot | |
178 | */ | |
179 | int trackdb_readable(void) { | |
180 | char *usersdb; | |
181 | ||
182 | byte_xasprintf(&usersdb, "%s/users.db", config->home); | |
183 | return access(usersdb, R_OK) == 0; | |
184 | } | |
185 | ||
d25c4615 RK |
186 | /** @brief Open database environment |
187 | * @param flags Flags word | |
188 | * | |
189 | * Flags should be one of: | |
190 | * - @ref TRACKDB_NO_RECOVER | |
191 | * - @ref TRACKDB_NORMAL_RECOVER | |
192 | * - @ref TRACKDB_FATAL_RECOVER | |
a745dd43 | 193 | * - @ref TRACKDB_MAY_CREATE |
d25c4615 RK |
194 | */ |
195 | void trackdb_init(int flags) { | |
460b9539 | 196 | int err; |
d25c4615 | 197 | const int recover = flags & TRACKDB_RECOVER_MASK; |
460b9539 | 198 | static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL }; |
199 | ||
200 | /* sanity checks */ | |
201 | assert(initialized == 0); | |
202 | ++initialized; | |
203 | if(home) { | |
204 | if(strcmp(home, config->home)) | |
205 | fatal(0, "cannot change db home without server restart"); | |
206 | home = config->home; | |
207 | } | |
208 | ||
a745dd43 RK |
209 | if(flags & TRACKDB_MAY_CREATE) { |
210 | DIR *dp; | |
211 | struct dirent *de; | |
212 | struct stat st; | |
213 | char *p; | |
214 | ||
a745dd43 RK |
215 | /* Remove world/group permissions on any regular files already in the |
216 | * database directory. Actually we don't care about all of them but it's | |
217 | * easier to just do the lot. This can be revisited if it's a serious | |
218 | * practical inconvenience for anyone. | |
219 | * | |
220 | * The socket, not being a regular file, is excepted. | |
221 | */ | |
222 | if(!(dp = opendir(config->home))) | |
223 | fatal(errno, "error reading %s", config->home); | |
224 | while((de = readdir(dp))) { | |
225 | byte_xasprintf(&p, "%s/%s", config->home, de->d_name); | |
226 | if(lstat(p, &st) == 0 | |
227 | && S_ISREG(st.st_mode) | |
228 | && (st.st_mode & 077)) { | |
f0feb22e | 229 | if(chmod(p, st.st_mode & 07700) < 0) |
a745dd43 RK |
230 | fatal(errno, "cannot chmod %s", p); |
231 | } | |
232 | xfree(p); | |
233 | } | |
234 | closedir(dp); | |
235 | } | |
236 | ||
460b9539 | 237 | /* create environment */ |
238 | if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s", | |
239 | db_strerror(err)); | |
240 | if((err = trackdb_env->set_alloc(trackdb_env, | |
241 | xmalloc_noptr, xrealloc_noptr, xfree))) | |
242 | fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err)); | |
243 | if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000))) | |
244 | fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err)); | |
245 | if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000))) | |
246 | fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err)); | |
247 | if((err = trackdb_env->open(trackdb_env, config->home, | |
248 | DB_INIT_LOG | |
249 | |DB_INIT_LOCK | |
250 | |DB_INIT_MPOOL | |
251 | |DB_INIT_TXN | |
252 | |DB_CREATE | |
253 | |recover_type[recover], | |
a745dd43 | 254 | 0600))) |
dc450d30 | 255 | fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err)); |
460b9539 | 256 | trackdb_env->set_errpfx(trackdb_env, "DB"); |
257 | trackdb_env->set_errfile(trackdb_env, stderr); | |
258 | trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1); | |
259 | trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1); | |
260 | trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1); | |
261 | D(("initialized database environment")); | |
262 | } | |
263 | ||
264 | /* called when deadlock manager terminates */ | |
265 | static int reap_db_deadlock(ev_source attribute((unused)) *ev, | |
266 | pid_t attribute((unused)) pid, | |
267 | int status, | |
268 | const struct rusage attribute((unused)) *rusage, | |
269 | void attribute((unused)) *u) { | |
270 | db_deadlock_pid = -1; | |
271 | if(initialized) | |
272 | fatal(0, "deadlock manager unexpectedly terminated: %s", | |
273 | wstat(status)); | |
274 | else | |
275 | D(("deadlock manager terminated: %s", wstat(status))); | |
276 | return 0; | |
277 | } | |
278 | ||
ffac51d7 RK |
279 | static pid_t subprogram(ev_source *ev, int outputfd, const char *prog, |
280 | ...) { | |
460b9539 | 281 | pid_t pid; |
ffac51d7 RK |
282 | va_list ap; |
283 | const char *args[1024], **argp, *a; | |
284 | ||
285 | argp = args; | |
286 | *argp++ = prog; | |
287 | *argp++ = "--config"; | |
288 | *argp++ = configfile; | |
289 | *argp++ = debugging ? "--debug" : "--no-debug"; | |
290 | *argp++ = log_default == &log_syslog ? "--syslog" : "--no-syslog"; | |
291 | va_start(ap, prog); | |
292 | while((a = va_arg(ap, const char *))) | |
293 | *argp++ = a; | |
294 | va_end(ap); | |
295 | *argp = 0; | |
460b9539 | 296 | /* If we're in the background then trap subprocess stdout/stderr */ |
460b9539 | 297 | if(!(pid = xfork())) { |
298 | exitfn = _exit; | |
f2218e3c RK |
299 | if(ev) |
300 | ev_signal_atfork(ev); | |
460b9539 | 301 | signal(SIGPIPE, SIG_DFL); |
d6dde5a3 RK |
302 | if(outputfd != -1) { |
303 | xdup2(outputfd, 1); | |
304 | xclose(outputfd); | |
460b9539 | 305 | } |
f0feb22e RK |
306 | /* ensure we don't leak privilege anywhere */ |
307 | if(setuid(geteuid()) < 0) | |
308 | fatal(errno, "error calling setuid"); | |
309 | /* If we were negatively niced, undo it. We don't bother checking for | |
310 | * error, it's not that important. */ | |
460b9539 | 311 | setpriority(PRIO_PROCESS, 0, 0); |
ffac51d7 | 312 | execvp(prog, (char **)args); |
460b9539 | 313 | fatal(errno, "error invoking %s", prog); |
314 | } | |
460b9539 | 315 | return pid; |
316 | } | |
317 | ||
318 | /* start deadlock manager */ | |
319 | void trackdb_master(ev_source *ev) { | |
320 | assert(db_deadlock_pid == -1); | |
ffac51d7 | 321 | db_deadlock_pid = subprogram(ev, -1, DEADLOCK, (char *)0); |
460b9539 | 322 | ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0); |
323 | D(("started deadlock manager")); | |
324 | } | |
325 | ||
326 | /* close environment */ | |
327 | void trackdb_deinit(void) { | |
328 | int err; | |
329 | ||
330 | /* sanity checks */ | |
331 | assert(initialized == 1); | |
332 | --initialized; | |
333 | ||
334 | /* close the environment */ | |
335 | if((err = trackdb_env->close(trackdb_env, 0))) | |
336 | fatal(0, "trackdb_env->close: %s", db_strerror(err)); | |
337 | ||
4363757e RK |
338 | if(rescan_pid != -1) { |
339 | /* shut down the rescanner */ | |
340 | if(kill(rescan_pid, SIGTERM) < 0) | |
341 | fatal(errno, "error killing rescanner"); | |
342 | /* wait for the rescanner to finish */ | |
343 | while(waitpid(rescan_pid, &err, 0) == -1 && errno == EINTR) | |
344 | ; | |
345 | } | |
346 | ||
347 | /* TODO kill any stats subprocesses */ | |
460b9539 | 348 | |
4363757e | 349 | /* finally terminate the deadlock manager */ |
460b9539 | 350 | if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0) |
351 | fatal(errno, "error killing deadlock manager"); | |
352 | db_deadlock_pid = -1; | |
353 | ||
354 | D(("deinitialized database environment")); | |
355 | } | |
356 | ||
357 | /* open a specific database */ | |
358 | static DB *open_db(const char *path, | |
359 | u_int32_t dbflags, | |
360 | DBTYPE dbtype, | |
361 | u_int32_t openflags, | |
362 | int mode) { | |
363 | int err; | |
364 | DB *db; | |
365 | ||
366 | D(("open %s", path)); | |
367 | path = config_get_file(path); | |
368 | if((err = db_create(&db, trackdb_env, 0))) | |
369 | fatal(0, "db_create %s: %s", path, db_strerror(err)); | |
370 | if(dbflags) | |
371 | if((err = db->set_flags(db, dbflags))) | |
372 | fatal(0, "db->set_flags %s: %s", path, db_strerror(err)); | |
373 | if(dbtype == DB_BTREE) | |
374 | if((err = db->set_bt_compare(db, compare))) | |
375 | fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err)); | |
376 | if((err = db->open(db, 0, path, 0, dbtype, | |
f9635e06 RK |
377 | openflags | DB_AUTO_COMMIT, mode))) { |
378 | if((openflags & DB_CREATE) || errno != ENOENT) | |
379 | fatal(0, "db->open %s: %s", path, db_strerror(err)); | |
380 | db->close(db, 0); | |
381 | db = 0; | |
382 | } | |
460b9539 | 383 | return db; |
384 | } | |
385 | ||
3dc3d7db | 386 | /** @brief Open track databases |
158d0961 | 387 | * @param flags Flags flags word |
d25c4615 | 388 | * |
f0feb22e | 389 | * @p flags should have one of: |
d25c4615 RK |
390 | * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted |
391 | * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted | |
392 | * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade | |
f0feb22e RK |
393 | * Also it may have: |
394 | * - @p TRACKDB_READ_ONLY, read only access | |
3dc3d7db | 395 | */ |
d25c4615 | 396 | void trackdb_open(int flags) { |
f982b120 | 397 | int err; |
f2218e3c | 398 | pid_t pid; |
f0feb22e | 399 | uint32_t dbflags = flags & TRACKDB_READ_ONLY ? DB_RDONLY : DB_CREATE; |
f9635e06 | 400 | |
460b9539 | 401 | /* sanity checks */ |
402 | assert(opened == 0); | |
403 | ++opened; | |
f9635e06 | 404 | /* check the database version first */ |
f0feb22e | 405 | trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_RDONLY, 0666); |
f9635e06 RK |
406 | if(trackdb_globaldb) { |
407 | /* This is an existing database */ | |
8818b7fc RK |
408 | const char *s; |
409 | long oldversion; | |
f9635e06 | 410 | |
8818b7fc | 411 | s = trackdb_get_global("_dbversion"); |
d25c4615 RK |
412 | /* Close the database again, we'll open it property below */ |
413 | if((err = trackdb_globaldb->close(trackdb_globaldb, 0))) | |
414 | fatal(0, "error closing global.db: %s", db_strerror(err)); | |
415 | trackdb_globaldb = 0; | |
416 | /* Convert version string to an integer */ | |
8818b7fc | 417 | oldversion = s ? atol(s) : 1; |
3dc3d7db | 418 | if(oldversion > config->dbversion) { |
d25c4615 | 419 | /* Database is from the future; we never allow this. */ |
3dc3d7db RK |
420 | fatal(0, "this version of DisOrder is too old for database version %ld", |
421 | oldversion); | |
422 | } | |
d25c4615 RK |
423 | if(oldversion < config->dbversion) { |
424 | /* Database version is out of date */ | |
425 | switch(flags & TRACKDB_UPGRADE_MASK) { | |
426 | case TRACKDB_NO_UPGRADE: | |
427 | /* This database needs upgrading but this is not permitted */ | |
428 | fatal(0, "database needs upgrading from %ld to %ld", | |
429 | oldversion, config->dbversion); | |
430 | case TRACKDB_CAN_UPGRADE: | |
431 | /* This database needs upgrading */ | |
f2218e3c RK |
432 | info("invoking disorder-dbupgrade to upgrade from %ld to %ld", |
433 | oldversion, config->dbversion); | |
ffac51d7 | 434 | pid = subprogram(0, -1, "disorder-dbupgrade", (char *)0); |
f2218e3c RK |
435 | while(waitpid(pid, &err, 0) == -1 && errno == EINTR) |
436 | ; | |
437 | if(err) | |
438 | fatal(0, "disorder-dbupgrade %s", wstat(err)); | |
439 | info("disorder-dbupgrade succeeded"); | |
440 | break; | |
d25c4615 RK |
441 | case TRACKDB_OPEN_FOR_UPGRADE: |
442 | break; | |
443 | default: | |
444 | abort(); | |
445 | } | |
f9635e06 | 446 | } |
d25c4615 | 447 | if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) { |
3dc3d7db RK |
448 | /* This doesn't make any sense */ |
449 | fatal(0, "database is already at current version"); | |
450 | } | |
f982b120 | 451 | trackdb_existing_database = 1; |
f9635e06 | 452 | } else { |
d25c4615 | 453 | if(flags & TRACKDB_OPEN_FOR_UPGRADE) { |
3dc3d7db RK |
454 | /* Cannot upgrade a new database */ |
455 | fatal(0, "cannot upgrade a database that does not exist"); | |
456 | } | |
f9635e06 | 457 | /* This is a brand new database */ |
f982b120 | 458 | trackdb_existing_database = 0; |
f9635e06 | 459 | } |
460b9539 | 460 | /* open the databases */ |
0934814d RK |
461 | if(!(trackdb_usersdb = open_db("users.db", |
462 | 0, DB_HASH, dbflags, 0600))) | |
463 | fatal(0, "cannot open users.db"); | |
460b9539 | 464 | trackdb_tracksdb = open_db("tracks.db", |
f0feb22e | 465 | DB_RECNUM, DB_BTREE, dbflags, 0666); |
460b9539 | 466 | trackdb_searchdb = open_db("search.db", |
f0feb22e | 467 | DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666); |
460b9539 | 468 | trackdb_tagsdb = open_db("tags.db", |
f0feb22e RK |
469 | DB_DUP|DB_DUPSORT, DB_HASH, dbflags, 0666); |
470 | trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, dbflags, 0666); | |
471 | trackdb_globaldb = open_db("global.db", 0, DB_HASH, dbflags, 0666); | |
2a10b70b | 472 | trackdb_noticeddb = open_db("noticed.db", |
f0feb22e | 473 | DB_DUPSORT, DB_BTREE, dbflags, 0666); |
fdca70ee | 474 | trackdb_scheduledb = open_db("schedule.db", 0, DB_HASH, dbflags, 0666); |
f982b120 | 475 | if(!trackdb_existing_database) { |
3dc3d7db | 476 | /* Stash the database version */ |
8818b7fc RK |
477 | char buf[32]; |
478 | ||
d25c4615 | 479 | assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE)); |
8818b7fc RK |
480 | snprintf(buf, sizeof buf, "%ld", config->dbversion); |
481 | trackdb_set_global("_dbversion", buf, 0); | |
482 | } | |
460b9539 | 483 | D(("opened databases")); |
484 | } | |
485 | ||
486 | /* close track databases */ | |
487 | void trackdb_close(void) { | |
488 | int err; | |
f0feb22e | 489 | |
460b9539 | 490 | /* sanity checks */ |
491 | assert(opened == 1); | |
492 | --opened; | |
493 | if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0))) | |
494 | fatal(0, "error closing tracks.db: %s", db_strerror(err)); | |
495 | if((err = trackdb_searchdb->close(trackdb_searchdb, 0))) | |
496 | fatal(0, "error closing search.db: %s", db_strerror(err)); | |
497 | if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0))) | |
498 | fatal(0, "error closing tags.db: %s", db_strerror(err)); | |
499 | if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0))) | |
500 | fatal(0, "error closing prefs.db: %s", db_strerror(err)); | |
501 | if((err = trackdb_globaldb->close(trackdb_globaldb, 0))) | |
502 | fatal(0, "error closing global.db: %s", db_strerror(err)); | |
2a10b70b RK |
503 | if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0))) |
504 | fatal(0, "error closing noticed.db: %s", db_strerror(err)); | |
fdca70ee RK |
505 | if((err = trackdb_scheduledb->close(trackdb_scheduledb, 0))) |
506 | fatal(0, "error closing schedule.db: %s", db_strerror(err)); | |
a745dd43 RK |
507 | if((err = trackdb_usersdb->close(trackdb_usersdb, 0))) |
508 | fatal(0, "error closing users.db: %s", db_strerror(err)); | |
460b9539 | 509 | trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0; |
510 | trackdb_tagsdb = trackdb_globaldb = 0; | |
511 | D(("closed databases")); | |
512 | } | |
513 | ||
514 | /* generic db routines *******************************************************/ | |
515 | ||
516 | /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or | |
517 | * DB_LOCK_DEADLOCK. */ | |
518 | int trackdb_getdata(DB *db, | |
519 | const char *track, | |
520 | struct kvp **kp, | |
521 | DB_TXN *tid) { | |
522 | int err; | |
523 | DBT key, data; | |
524 | ||
525 | switch(err = db->get(db, tid, make_key(&key, track), | |
526 | prepare_data(&data), 0)) { | |
527 | case 0: | |
528 | *kp = kvp_urldecode(data.data, data.size); | |
529 | return 0; | |
530 | case DB_NOTFOUND: | |
531 | *kp = 0; | |
532 | return err; | |
533 | case DB_LOCK_DEADLOCK: | |
534 | error(0, "error querying database: %s", db_strerror(err)); | |
535 | return err; | |
536 | default: | |
537 | fatal(0, "error querying database: %s", db_strerror(err)); | |
538 | } | |
539 | } | |
540 | ||
541 | /* encode and store a database entry. Returns 0, DB_KEYEXIST or | |
542 | * DB_LOCK_DEADLOCK. */ | |
543 | int trackdb_putdata(DB *db, | |
544 | const char *track, | |
545 | const struct kvp *k, | |
546 | DB_TXN *tid, | |
547 | u_int32_t flags) { | |
548 | int err; | |
549 | DBT key, data; | |
550 | ||
551 | switch(err = db->put(db, tid, make_key(&key, track), | |
552 | encode_data(&data, k), flags)) { | |
553 | case 0: | |
554 | case DB_KEYEXIST: | |
555 | return err; | |
556 | case DB_LOCK_DEADLOCK: | |
557 | error(0, "error updating database: %s", db_strerror(err)); | |
558 | return err; | |
559 | default: | |
560 | fatal(0, "error updating database: %s", db_strerror(err)); | |
561 | } | |
562 | } | |
563 | ||
f0feb22e RK |
564 | /** @brief Delete a database entry |
565 | * @param db Database | |
566 | * @param track Key to delete | |
567 | * @param tid Transaction ID | |
568 | * @return 0, DB_NOTFOUND or DB_LOCK_DEADLOCK | |
569 | */ | |
460b9539 | 570 | int trackdb_delkey(DB *db, |
571 | const char *track, | |
572 | DB_TXN *tid) { | |
573 | int err; | |
574 | ||
575 | DBT key; | |
576 | switch(err = db->del(db, tid, make_key(&key, track), 0)) { | |
577 | case 0: | |
578 | case DB_NOTFOUND: | |
579 | return 0; | |
580 | case DB_LOCK_DEADLOCK: | |
581 | error(0, "error updating database: %s", db_strerror(err)); | |
582 | return err; | |
583 | default: | |
584 | fatal(0, "error updating database: %s", db_strerror(err)); | |
585 | } | |
586 | } | |
587 | ||
588 | /* open a database cursor */ | |
589 | DBC *trackdb_opencursor(DB *db, DB_TXN *tid) { | |
590 | int err; | |
591 | DBC *c; | |
592 | ||
593 | switch(err = db->cursor(db, tid, &c, 0)) { | |
594 | case 0: break; | |
595 | default: fatal(0, "error creating cursor: %s", db_strerror(err)); | |
596 | } | |
597 | return c; | |
598 | } | |
599 | ||
600 | /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */ | |
601 | int trackdb_closecursor(DBC *c) { | |
602 | int err; | |
603 | ||
604 | if(!c) return 0; | |
605 | switch(err = c->c_close(c)) { | |
606 | case 0: | |
607 | return err; | |
608 | case DB_LOCK_DEADLOCK: | |
609 | error(0, "error closing cursor: %s", db_strerror(err)); | |
610 | return err; | |
611 | default: | |
612 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
613 | } | |
614 | } | |
615 | ||
616 | /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */ | |
617 | int trackdb_delkeydata(DB *db, | |
618 | const char *word, | |
619 | const char *track, | |
620 | DB_TXN *tid) { | |
621 | int err; | |
622 | DBC *c; | |
623 | DBT key, data; | |
624 | ||
625 | c = trackdb_opencursor(db, tid); | |
626 | switch(err = c->c_get(c, make_key(&key, word), | |
627 | make_key(&data, track), DB_GET_BOTH)) { | |
628 | case 0: | |
629 | switch(err = c->c_del(c, 0)) { | |
630 | case 0: | |
631 | break; | |
632 | case DB_KEYEMPTY: | |
633 | err = 0; | |
634 | break; | |
635 | case DB_LOCK_DEADLOCK: | |
636 | error(0, "error updating database: %s", db_strerror(err)); | |
637 | break; | |
638 | default: | |
639 | fatal(0, "c->c_del: %s", db_strerror(err)); | |
640 | } | |
641 | break; | |
642 | case DB_NOTFOUND: | |
643 | break; | |
644 | case DB_LOCK_DEADLOCK: | |
645 | error(0, "error updating database: %s", db_strerror(err)); | |
646 | break; | |
647 | default: | |
648 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
649 | } | |
650 | if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK; | |
651 | return err; | |
652 | } | |
653 | ||
654 | /* start a transaction */ | |
655 | DB_TXN *trackdb_begin_transaction(void) { | |
656 | DB_TXN *tid; | |
657 | int err; | |
658 | ||
659 | if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0))) | |
660 | fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err)); | |
661 | return tid; | |
662 | } | |
663 | ||
664 | /* abort transaction */ | |
665 | void trackdb_abort_transaction(DB_TXN *tid) { | |
666 | int err; | |
667 | ||
668 | if(tid) | |
669 | if((err = tid->abort(tid))) | |
670 | fatal(0, "tid->abort: %s", db_strerror(err)); | |
671 | } | |
672 | ||
673 | /* commit transaction */ | |
674 | void trackdb_commit_transaction(DB_TXN *tid) { | |
675 | int err; | |
676 | ||
677 | if((err = tid->commit(tid, 0))) | |
678 | fatal(0, "tid->commit: %s", db_strerror(err)); | |
679 | } | |
680 | ||
681 | /* search/tags shared code ***************************************************/ | |
682 | ||
683 | /* comparison function used by dedupe() */ | |
684 | static int wordcmp(const void *a, const void *b) { | |
685 | return strcmp(*(const char **)a, *(const char **)b); | |
686 | } | |
687 | ||
688 | /* sort and de-dupe VEC */ | |
689 | static char **dedupe(char **vec, int nvec) { | |
690 | int m, n; | |
691 | ||
692 | qsort(vec, nvec, sizeof (char *), wordcmp); | |
693 | m = n = 0; | |
694 | if(nvec) { | |
695 | vec[m++] = vec[0]; | |
696 | for(n = 1; n < nvec; ++n) | |
697 | if(strcmp(vec[n], vec[m - 1])) | |
698 | vec[m++] = vec[n]; | |
699 | } | |
700 | vec[m] = 0; | |
701 | return vec; | |
702 | } | |
703 | ||
704 | /* update a key/track database. Returns 0 or DB_DEADLOCK. */ | |
705 | static int register_word(DB *db, const char *what, | |
706 | const char *track, const char *word, | |
707 | DB_TXN *tid) { | |
708 | int err; | |
709 | DBT key, data; | |
710 | ||
711 | switch(err = db->put(db, tid, make_key(&key, word), | |
712 | make_key(&data, track), DB_NODUPDATA)) { | |
713 | case 0: | |
714 | case DB_KEYEXIST: | |
715 | return 0; | |
716 | case DB_LOCK_DEADLOCK: | |
717 | error(0, "error updating %s.db: %s", what, db_strerror(err)); | |
718 | return err; | |
719 | default: | |
720 | fatal(0, "error updating %s.db: %s", what, db_strerror(err)); | |
721 | } | |
722 | } | |
723 | ||
724 | /* search primitives *********************************************************/ | |
725 | ||
726 | /* return true iff NAME is a trackname_display_ pref */ | |
727 | static int is_display_pref(const char *name) { | |
728 | static const char prefix[] = "trackname_display_"; | |
729 | return !strncmp(name, prefix, (sizeof prefix) - 1); | |
730 | } | |
731 | ||
c85b7022 RK |
732 | /** @brief Word_Break property tailor that treats underscores as spaces */ |
733 | static int tailor_underscore_Word_Break_Other(uint32_t c) { | |
734 | switch(c) { | |
735 | default: | |
736 | return -1; | |
737 | case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */ | |
738 | return unicode_Word_Break_Other; | |
739 | } | |
740 | } | |
741 | ||
3c82b504 RK |
742 | /** @brief Remove all combining characters in-place |
743 | * @param s Pointer to start of string | |
744 | * @param ns Length of string | |
745 | * @return New, possiblby reduced, length | |
746 | */ | |
747 | static size_t remove_combining_chars(uint32_t *s, size_t ns) { | |
748 | uint32_t *start = s, *t = s, *end = s + ns; | |
749 | ||
750 | while(s < end) { | |
751 | const uint32_t c = *s++; | |
752 | if(!utf32_combining_class(c)) | |
753 | *t++ = c; | |
754 | } | |
755 | return t - start; | |
756 | } | |
757 | ||
c85b7022 RK |
758 | /** @brief Normalize and split a string using a given tailoring */ |
759 | static void word_split(struct vector *v, | |
760 | const char *s, | |
761 | unicode_property_tailor *pt) { | |
762 | size_t nw, nt32, i; | |
763 | uint32_t *t32, **w32; | |
764 | ||
765 | /* Convert to UTF-32 */ | |
766 | if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32))) | |
767 | return; | |
768 | /* Erase case distinctions */ | |
769 | if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32))) | |
770 | return; | |
3c82b504 RK |
771 | /* Drop combining characters */ |
772 | nt32 = remove_combining_chars(t32, nt32); | |
c85b7022 RK |
773 | /* Split into words, treating _ as a space */ |
774 | w32 = utf32_word_split(t32, nt32, &nw, pt); | |
775 | /* Convert words back to UTF-8 and append to result */ | |
776 | for(i = 0; i < nw; ++i) | |
777 | vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0)); | |
778 | } | |
779 | ||
a3777123 RK |
780 | /** @brief Normalize a tag |
781 | * @param s Tag | |
782 | * @param ns Length of tag | |
783 | * @return Normalized string or NULL on error | |
784 | * | |
785 | * The return value will be: | |
786 | * - case-folded | |
787 | * - have no leading or trailing space | |
788 | * - have no combining characters | |
789 | * - all spacing between words will be a single U+0020 SPACE | |
790 | */ | |
791 | static char *normalize_tag(const char *s, size_t ns) { | |
792 | uint32_t *s32, **w32; | |
793 | size_t ns32, nw32, i; | |
794 | struct dynstr d[1]; | |
795 | ||
796 | if(!(s32 = utf8_to_utf32(s, ns, &ns32))) | |
797 | return 0; | |
798 | if(!(s32 = utf32_casefold_compat(s32, ns32, &ns32))) /* ->NFKD */ | |
799 | return 0; | |
800 | ns32 = remove_combining_chars(s32, ns32); | |
801 | /* Split into words, no Word_Break tailoring */ | |
802 | w32 = utf32_word_split(s32, ns32, &nw32, 0); | |
803 | /* Compose back into a string */ | |
804 | dynstr_init(d); | |
805 | for(i = 0; i < nw32; ++i) { | |
806 | if(i) | |
807 | dynstr_append(d, ' '); | |
808 | dynstr_append_string(d, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0)); | |
809 | } | |
810 | dynstr_terminate(d); | |
811 | return d->vec; | |
812 | } | |
813 | ||
460b9539 | 814 | /* compute the words of a track name */ |
815 | static char **track_to_words(const char *track, | |
816 | const struct kvp *p) { | |
817 | struct vector v; | |
a8747834 | 818 | const char *rootless = track_rootless(track); |
460b9539 | 819 | |
a8747834 | 820 | if(!rootless) |
821 | rootless = track; /* bodge */ | |
460b9539 | 822 | vector_init(&v); |
c85b7022 RK |
823 | rootless = strip_extension(rootless); |
824 | word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other); | |
460b9539 | 825 | for(; p; p = p->next) |
826 | if(is_display_pref(p->name)) | |
c85b7022 | 827 | word_split(&v, p->value, 0); |
460b9539 | 828 | vector_terminate(&v); |
829 | return dedupe(v.vec, v.nvec); | |
830 | } | |
831 | ||
832 | /* return nonzero iff WORD is a stopword */ | |
833 | static int stopword(const char *word) { | |
834 | int n; | |
835 | ||
836 | for(n = 0; n < config->stopword.n | |
837 | && strcmp(word, config->stopword.s[n]); ++n) | |
838 | ; | |
839 | return n < config->stopword.n; | |
840 | } | |
841 | ||
842 | /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */ | |
843 | static int register_search_word(const char *track, const char *word, | |
844 | DB_TXN *tid) { | |
845 | if(stopword(word)) return 0; | |
846 | return register_word(trackdb_searchdb, "search", track, word, tid); | |
847 | } | |
848 | ||
849 | /* Tags **********************************************************************/ | |
850 | ||
851 | /* Return nonzero if C is a valid tag character */ | |
852 | static int tagchar(int c) { | |
853 | switch(c) { | |
854 | case ',': | |
855 | return 0; | |
856 | default: | |
857 | return c >= ' '; | |
858 | } | |
859 | } | |
860 | ||
861 | /* Parse and de-dupe a tag list. If S=0 then assumes "". */ | |
91c9324a | 862 | char **parsetags(const char *s) { |
460b9539 | 863 | const char *t; |
864 | struct vector v; | |
865 | ||
866 | vector_init(&v); | |
867 | if(s) { | |
868 | /* skip initial separators */ | |
869 | while(*s && (!tagchar(*s) || *s == ' ')) | |
870 | ++s; | |
871 | while(*s) { | |
872 | /* find the extent of the tag */ | |
873 | t = s; | |
874 | while(*s && tagchar(*s)) | |
875 | ++s; | |
876 | /* strip trailing spaces */ | |
877 | while(s > t && s[-1] == ' ') | |
878 | --s; | |
a3777123 RK |
879 | /* add tag to list */ |
880 | vector_append(&v, normalize_tag(t, (size_t)(s - t))); | |
460b9539 | 881 | /* skip intermediate and trailing separators */ |
882 | while(*s && (!tagchar(*s) || *s == ' ')) | |
883 | ++s; | |
884 | } | |
885 | } | |
886 | vector_terminate(&v); | |
887 | return dedupe(v.vec, v.nvec); | |
888 | } | |
889 | ||
890 | /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */ | |
891 | static int register_tag(const char *track, const char *tag, DB_TXN *tid) { | |
892 | return register_word(trackdb_tagsdb, "tags", track, tag, tid); | |
893 | } | |
894 | ||
895 | /* aliases *******************************************************************/ | |
896 | ||
897 | /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If | |
898 | * there is no alias sets *aliasp to 0. */ | |
899 | static int compute_alias(char **aliasp, | |
900 | const char *track, | |
901 | const struct kvp *p, | |
902 | DB_TXN *tid) { | |
903 | struct dynstr d; | |
904 | const char *s = config->alias, *t, *expansion, *part; | |
905 | int c, used_db = 0, slash_prefix, err; | |
906 | struct kvp *at; | |
137e36ed | 907 | const char *const root = find_track_root(track); |
460b9539 | 908 | |
137e36ed | 909 | if(!root) { |
910 | /* Bodge for tracks with no root */ | |
911 | *aliasp = 0; | |
912 | return 0; | |
913 | } | |
460b9539 | 914 | dynstr_init(&d); |
137e36ed | 915 | dynstr_append_string(&d, root); |
460b9539 | 916 | while((c = (unsigned char)*s++)) { |
917 | if(c != '{') { | |
918 | dynstr_append(&d, c); | |
919 | continue; | |
920 | } | |
921 | if((slash_prefix = (*s == '/'))) | |
922 | s++; | |
923 | t = strchr(s, '}'); | |
924 | assert(t != 0); /* validated at startup */ | |
925 | part = xstrndup(s, t - s); | |
926 | expansion = getpart(track, "display", part, p, &used_db); | |
927 | if(*expansion) { | |
928 | if(slash_prefix) dynstr_append(&d, '/'); | |
929 | dynstr_append_string(&d, expansion); | |
930 | } | |
931 | s = t + 1; /* skip {part} */ | |
932 | } | |
933 | /* only admit to the alias if we used the db... */ | |
934 | if(!used_db) { | |
935 | *aliasp = 0; | |
936 | return 0; | |
937 | } | |
938 | dynstr_terminate(&d); | |
939 | /* ...and the answer differs from the original... */ | |
940 | if(!strcmp(track, d.vec)) { | |
941 | *aliasp = 0; | |
942 | return 0; | |
943 | } | |
944 | /* ...and there isn't already a different track with that name (including as | |
945 | * an alias) */ | |
946 | switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) { | |
947 | case 0: | |
460b9539 | 948 | if((s = kvp_get(at, "_alias_for")) |
949 | && !strcmp(s, track)) { | |
950 | case DB_NOTFOUND: | |
460b9539 | 951 | *aliasp = d.vec; |
952 | } else { | |
460b9539 | 953 | *aliasp = 0; |
954 | } | |
955 | return 0; | |
956 | default: | |
957 | return err; | |
958 | } | |
959 | } | |
960 | ||
961 | /* get track and prefs data (if tp/pp not null pointers). Returns 0 on | |
962 | * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK. | |
963 | * Always sets the return values, even if only to null pointers. */ | |
964 | static int gettrackdata(const char *track, | |
965 | struct kvp **tp, | |
966 | struct kvp **pp, | |
967 | const char **actualp, | |
968 | unsigned flags, | |
969 | #define GTD_NOALIAS 0x0001 | |
970 | DB_TXN *tid) { | |
971 | int err; | |
972 | const char *actual = track; | |
973 | struct kvp *t = 0, *p = 0; | |
f0feb22e | 974 | |
460b9539 | 975 | if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done; |
976 | if((actual = kvp_get(t, "_alias_for"))) { | |
977 | if(flags & GTD_NOALIAS) { | |
978 | error(0, "alias passed to gettrackdata where real path required"); | |
979 | abort(); | |
980 | } | |
981 | if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done; | |
982 | } else | |
983 | actual = track; | |
984 | assert(actual != 0); | |
985 | if(pp) { | |
986 | if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK) | |
987 | goto done; | |
988 | } | |
989 | err = 0; | |
990 | done: | |
991 | if(actualp) *actualp = actual; | |
992 | if(tp) *tp = t; | |
993 | if(pp) *pp = p; | |
994 | return err; | |
995 | } | |
996 | ||
997 | /* trackdb_notice() **********************************************************/ | |
998 | ||
6c81eef9 | 999 | /** @brief notice a possibly new track |
2a10b70b RK |
1000 | * @return @c DB_NOTFOUND if new, 0 if already known |
1001 | */ | |
460b9539 | 1002 | int trackdb_notice(const char *track, |
1003 | const char *path) { | |
1004 | int err; | |
1005 | DB_TXN *tid; | |
f0feb22e | 1006 | |
460b9539 | 1007 | for(;;) { |
1008 | tid = trackdb_begin_transaction(); | |
1009 | err = trackdb_notice_tid(track, path, tid); | |
1010 | if((err == DB_LOCK_DEADLOCK)) goto fail; | |
1011 | break; | |
1012 | fail: | |
1013 | trackdb_abort_transaction(tid); | |
1014 | } | |
1015 | trackdb_commit_transaction(tid); | |
1016 | return err; | |
1017 | } | |
1018 | ||
6c81eef9 | 1019 | /** @brief notice a possibly new track |
f9635e06 RK |
1020 | * @param track NFC UTF-8 track name |
1021 | * @param path Raw path name | |
1022 | * @param tid Transaction ID | |
2a10b70b RK |
1023 | * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also |
1024 | */ | |
460b9539 | 1025 | int trackdb_notice_tid(const char *track, |
1026 | const char *path, | |
1027 | DB_TXN *tid) { | |
1028 | int err, n; | |
1029 | struct kvp *t, *a, *p; | |
1030 | int t_changed, ret; | |
343c64f2 RK |
1031 | char *alias, **w, *noticed; |
1032 | time_t now; | |
2a10b70b | 1033 | |
460b9539 | 1034 | /* notice whether the tracks.db entry changes */ |
1035 | t_changed = 0; | |
1036 | /* get any existing tracks entry */ | |
1037 | if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
1038 | return err; | |
2a10b70b | 1039 | ret = err; /* 0 or DB_NOTFOUND */ |
460b9539 | 1040 | /* this is a real track */ |
1041 | t_changed += kvp_set(&t, "_alias_for", 0); | |
1042 | t_changed += kvp_set(&t, "_path", path); | |
343c64f2 RK |
1043 | time(&now); |
1044 | if(ret == DB_NOTFOUND) { | |
1045 | /* It's a new track; record the time */ | |
1046 | byte_xasprintf(¬iced, "%lld", (long long)now); | |
1047 | t_changed += kvp_set(&t, "_noticed", noticed); | |
1048 | } | |
460b9539 | 1049 | /* if we have an alias record it in the database */ |
1050 | if((err = compute_alias(&alias, track, p, tid))) return err; | |
1051 | if(alias) { | |
1052 | /* won't overwrite someone else's alias as compute_alias() checks */ | |
1053 | D(("%s: alias %s", track, alias)); | |
1054 | a = 0; | |
1055 | kvp_set(&a, "_alias_for", track); | |
1056 | if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err; | |
1057 | } | |
1058 | /* update search.db */ | |
1059 | w = track_to_words(track, p); | |
1060 | for(n = 0; w[n]; ++n) | |
1061 | if((err = register_search_word(track, w[n], tid))) | |
1062 | return err; | |
1063 | /* update tags.db */ | |
1064 | w = parsetags(kvp_get(p, "tags")); | |
1065 | for(n = 0; w[n]; ++n) | |
1066 | if((err = register_tag(track, w[n], tid))) | |
1067 | return err; | |
460b9539 | 1068 | /* only store the tracks.db entry if it has changed */ |
1069 | if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))) | |
1070 | return err; | |
2a10b70b RK |
1071 | if(ret == DB_NOTFOUND) { |
1072 | uint32_t timestamp[2]; | |
2a10b70b RK |
1073 | DBT key, data; |
1074 | ||
2a10b70b RK |
1075 | timestamp[0] = htonl((uint64_t)now >> 32); |
1076 | timestamp[1] = htonl((uint32_t)now); | |
1077 | memset(&key, 0, sizeof key); | |
1078 | key.data = timestamp; | |
1079 | key.size = sizeof timestamp; | |
1080 | switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key, | |
1081 | make_key(&data, track), 0)) { | |
1082 | case 0: break; | |
1083 | case DB_LOCK_DEADLOCK: return err; | |
1084 | default: fatal(0, "error updating noticed.db: %s", db_strerror(err)); | |
1085 | } | |
1086 | } | |
460b9539 | 1087 | return ret; |
1088 | } | |
1089 | ||
1090 | /* trackdb_obsolete() ********************************************************/ | |
1091 | ||
1092 | /* obsolete a track */ | |
1093 | int trackdb_obsolete(const char *track, DB_TXN *tid) { | |
1094 | int err, n; | |
1095 | struct kvp *p; | |
1096 | char *alias, **w; | |
1097 | ||
1098 | if((err = gettrackdata(track, 0, &p, 0, | |
1099 | GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK) | |
1100 | return err; | |
1101 | else if(err == DB_NOTFOUND) return 0; | |
1102 | /* compute the alias, if any, and delete it */ | |
f0feb22e | 1103 | if((err = compute_alias(&alias, track, p, tid))) return err; |
460b9539 | 1104 | if(alias) { |
1105 | /* if the alias points to some other track then compute_alias won't | |
1106 | * return it */ | |
f0feb22e RK |
1107 | if((err = trackdb_delkey(trackdb_tracksdb, alias, tid)) |
1108 | && err != DB_NOTFOUND) | |
460b9539 | 1109 | return err; |
1110 | } | |
1111 | /* update search.db */ | |
1112 | w = track_to_words(track, p); | |
1113 | for(n = 0; w[n]; ++n) | |
1114 | if(trackdb_delkeydata(trackdb_searchdb, | |
1115 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
1116 | return err; | |
1117 | /* update tags.db */ | |
1118 | w = parsetags(kvp_get(p, "tags")); | |
1119 | for(n = 0; w[n]; ++n) | |
1120 | if(trackdb_delkeydata(trackdb_tagsdb, | |
1121 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
1122 | return err; | |
460b9539 | 1123 | /* update tracks.db */ |
1124 | if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK) | |
1125 | return err; | |
1126 | /* We don't delete the prefs, so they survive temporary outages of the | |
1127 | * (possibly virtual) track filesystem */ | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | /* trackdb_stats() ***********************************************************/ | |
1132 | ||
1133 | #define H(name) { #name, offsetof(DB_HASH_STAT, name) } | |
1134 | #define B(name) { #name, offsetof(DB_BTREE_STAT, name) } | |
1135 | ||
1136 | static const struct statinfo { | |
1137 | const char *name; | |
1138 | size_t offset; | |
1139 | } statinfo_hash[] = { | |
1140 | H(hash_magic), | |
1141 | H(hash_version), | |
1142 | H(hash_nkeys), | |
1143 | H(hash_ndata), | |
1144 | H(hash_pagesize), | |
1145 | H(hash_ffactor), | |
1146 | H(hash_buckets), | |
1147 | H(hash_free), | |
1148 | H(hash_bfree), | |
1149 | H(hash_bigpages), | |
1150 | H(hash_big_bfree), | |
1151 | H(hash_overflows), | |
1152 | H(hash_ovfl_free), | |
1153 | H(hash_dup), | |
1154 | H(hash_dup_free), | |
1155 | }, statinfo_btree[] = { | |
1156 | B(bt_magic), | |
1157 | B(bt_version), | |
1158 | B(bt_nkeys), | |
1159 | B(bt_ndata), | |
1160 | B(bt_pagesize), | |
1161 | B(bt_minkey), | |
1162 | B(bt_re_len), | |
1163 | B(bt_re_pad), | |
1164 | B(bt_levels), | |
1165 | B(bt_int_pg), | |
1166 | B(bt_leaf_pg), | |
1167 | B(bt_dup_pg), | |
1168 | B(bt_over_pg), | |
1169 | B(bt_free), | |
1170 | B(bt_int_pgfree), | |
1171 | B(bt_leaf_pgfree), | |
1172 | B(bt_dup_pgfree), | |
1173 | B(bt_over_pgfree), | |
1174 | }; | |
1175 | ||
1176 | /* look up stats for DB */ | |
1177 | static int get_stats(struct vector *v, | |
1178 | DB *database, | |
1179 | const struct statinfo *si, | |
1180 | size_t nsi, | |
1181 | DB_TXN *tid) { | |
1182 | void *sp; | |
1183 | size_t n; | |
1184 | char *str; | |
1185 | int err; | |
1186 | ||
1187 | if(database) { | |
1188 | switch(err = database->stat(database, tid, &sp, 0)) { | |
1189 | case 0: | |
1190 | break; | |
1191 | case DB_LOCK_DEADLOCK: | |
1192 | error(0, "error querying database: %s", db_strerror(err)); | |
1193 | return err; | |
1194 | default: | |
1195 | fatal(0, "error querying database: %s", db_strerror(err)); | |
1196 | } | |
1197 | for(n = 0; n < nsi; ++n) { | |
1198 | byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name, | |
1199 | (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset)); | |
1200 | vector_append(v, str); | |
1201 | } | |
1202 | } | |
1203 | return 0; | |
1204 | } | |
1205 | ||
ff76b21b | 1206 | /** @brief One entry in the search league */ |
460b9539 | 1207 | struct search_entry { |
1208 | char *word; | |
1209 | int n; | |
1210 | }; | |
1211 | ||
ff76b21b RK |
1212 | /** @brief Add a word to the search league |
1213 | * @param se Pointer to search league | |
1214 | * @param count Maximum size for search league | |
1215 | * @param nse Current size of search league | |
1216 | * @param word New word, or NULL | |
1217 | * @param n How often @p word appears | |
1218 | * @return New size of search league | |
1219 | */ | |
1220 | static int register_search_entry(struct search_entry *se, | |
1221 | int count, | |
1222 | int nse, | |
1223 | char *word, | |
1224 | int n) { | |
1225 | int i; | |
1226 | ||
1227 | if(word && (nse < count || n > se[nse - 1].n)) { | |
1228 | /* Find the starting point */ | |
1229 | if(nse == count) | |
1230 | i = nse - 1; | |
1231 | else | |
1232 | i = nse++; | |
1233 | /* Find the insertion point */ | |
1234 | while(i > 0 && n > se[i - 1].n) | |
1235 | --i; | |
1236 | memmove(&se[i + 1], &se[i], (nse - i - 1) * sizeof *se); | |
1237 | se[i].word = word; | |
1238 | se[i].n = n; | |
1239 | } | |
1240 | return nse; | |
1241 | } | |
1242 | ||
460b9539 | 1243 | /* find the top COUNT words in the search database */ |
1244 | static int search_league(struct vector *v, int count, DB_TXN *tid) { | |
1245 | struct search_entry *se; | |
1246 | DBT k, d; | |
1247 | DBC *cursor; | |
1248 | int err, n = 0, nse = 0, i; | |
1249 | char *word = 0; | |
1250 | size_t wl = 0; | |
1251 | char *str; | |
1252 | ||
1253 | cursor = trackdb_opencursor(trackdb_searchdb, tid); | |
1254 | se = xmalloc(count * sizeof *se); | |
ff76b21b RK |
1255 | /* Walk across the whole database counting up the number of times each |
1256 | * word appears. */ | |
460b9539 | 1257 | while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d), |
1258 | DB_NEXT))) { | |
1259 | if(word && wl == k.size && !strncmp(word, k.data, wl)) | |
ff76b21b | 1260 | ++n; /* same word again */ |
460b9539 | 1261 | else { |
ff76b21b | 1262 | nse = register_search_entry(se, count, nse, word, n); |
460b9539 | 1263 | word = xstrndup(k.data, wl = k.size); |
1264 | n = 1; | |
1265 | } | |
1266 | } | |
1267 | switch(err) { | |
1268 | case DB_NOTFOUND: | |
1269 | err = 0; | |
1270 | break; | |
1271 | case DB_LOCK_DEADLOCK: | |
1272 | error(0, "error querying search database: %s", db_strerror(err)); | |
1273 | break; | |
1274 | default: | |
1275 | fatal(0, "error querying search database: %s", db_strerror(err)); | |
1276 | } | |
1277 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1278 | if(err) return err; | |
ff76b21b | 1279 | nse = register_search_entry(se, count, nse, word, n); |
460b9539 | 1280 | byte_xasprintf(&str, "Top %d search words:", nse); |
1281 | vector_append(v, str); | |
1282 | for(i = 0; i < nse; ++i) { | |
1283 | byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word); | |
1284 | vector_append(v, str); | |
1285 | } | |
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | #define SI(what) statinfo_##what, \ | |
1290 | sizeof statinfo_##what / sizeof (struct statinfo) | |
1291 | ||
1292 | /* return a list of database stats */ | |
1293 | char **trackdb_stats(int *nstatsp) { | |
1294 | DB_TXN *tid; | |
1295 | struct vector v; | |
f0feb22e | 1296 | |
460b9539 | 1297 | vector_init(&v); |
1298 | for(;;) { | |
1299 | tid = trackdb_begin_transaction(); | |
1300 | v.nvec = 0; | |
1301 | vector_append(&v, (char *)"Tracks database stats:"); | |
1302 | if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail; | |
1303 | vector_append(&v, (char *)""); | |
1304 | vector_append(&v, (char *)"Search database stats:"); | |
1305 | if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail; | |
1306 | vector_append(&v, (char *)""); | |
1307 | vector_append(&v, (char *)"Prefs database stats:"); | |
1308 | if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail; | |
1309 | vector_append(&v, (char *)""); | |
1310 | if(search_league(&v, 10, tid)) goto fail; | |
460b9539 | 1311 | vector_terminate(&v); |
1312 | break; | |
1313 | fail: | |
1314 | trackdb_abort_transaction(tid); | |
1315 | } | |
1316 | trackdb_commit_transaction(tid); | |
1317 | if(nstatsp) *nstatsp = v.nvec; | |
1318 | return v.vec; | |
1319 | } | |
1320 | ||
d6dde5a3 RK |
1321 | struct stats_details { |
1322 | void (*done)(char *data, void *u); | |
1323 | void *u; | |
1324 | int exited; /* subprocess exited */ | |
1325 | int closed; /* pipe close */ | |
1326 | int wstat; /* wait status from subprocess */ | |
1327 | struct dynstr data[1]; /* data read from pipe */ | |
1328 | }; | |
1329 | ||
1330 | static void stats_complete(struct stats_details *d) { | |
1331 | char *s; | |
ff76b21b | 1332 | |
d6dde5a3 RK |
1333 | if(!(d->exited && d->closed)) |
1334 | return; | |
1335 | byte_xasprintf(&s, "\n" | |
1336 | "Server stats:\n" | |
1337 | "track lookup cache hits: %lu\n" | |
1338 | "track lookup cache misses: %lu\n", | |
1339 | cache_files_hits, | |
1340 | cache_files_misses); | |
1341 | dynstr_append_string(d->data, s); | |
1342 | dynstr_terminate(d->data); | |
1343 | d->done(d->data->vec, d->u); | |
1344 | } | |
1345 | ||
1346 | static int stats_finished(ev_source attribute((unused)) *ev, | |
1347 | pid_t attribute((unused)) pid, | |
1348 | int status, | |
1349 | const struct rusage attribute((unused)) *rusage, | |
1350 | void *u) { | |
1351 | struct stats_details *const d = u; | |
1352 | ||
1353 | d->exited = 1; | |
1354 | if(status) | |
1355 | error(0, "disorder-stats %s", wstat(status)); | |
1356 | stats_complete(d); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int stats_read(ev_source attribute((unused)) *ev, | |
1361 | ev_reader *reader, | |
d6dde5a3 RK |
1362 | void *ptr, |
1363 | size_t bytes, | |
1364 | int eof, | |
1365 | void *u) { | |
1366 | struct stats_details *const d = u; | |
1367 | ||
1368 | dynstr_append_bytes(d->data, ptr, bytes); | |
1369 | ev_reader_consume(reader, bytes); | |
1370 | if(eof) | |
1371 | d->closed = 1; | |
1372 | stats_complete(d); | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static int stats_error(ev_source attribute((unused)) *ev, | |
d6dde5a3 RK |
1377 | int errno_value, |
1378 | void *u) { | |
1379 | struct stats_details *const d = u; | |
1380 | ||
1381 | error(errno_value, "error reading from pipe to disorder-stats"); | |
1382 | d->closed = 1; | |
1383 | stats_complete(d); | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | void trackdb_stats_subprocess(ev_source *ev, | |
1388 | void (*done)(char *data, void *u), | |
1389 | void *u) { | |
1390 | int p[2]; | |
1391 | pid_t pid; | |
1392 | struct stats_details *d = xmalloc(sizeof *d); | |
1393 | ||
1394 | dynstr_init(d->data); | |
1395 | d->done = done; | |
1396 | d->u = u; | |
1397 | xpipe(p); | |
ffac51d7 | 1398 | pid = subprogram(ev, p[1], "disorder-stats", (char *)0); |
d6dde5a3 RK |
1399 | xclose(p[1]); |
1400 | ev_child(ev, pid, 0, stats_finished, d); | |
1401 | ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader"); | |
1402 | } | |
1403 | ||
02eaa49d RK |
1404 | /** @brief Parse a track name part preference |
1405 | * @param name Preference name | |
1406 | * @param partp Where to store part name | |
1407 | * @param contextp Where to store context name | |
1408 | * @return 0 on success, non-0 if parse fails | |
1409 | */ | |
1410 | static int trackdb__parse_namepref(const char *name, | |
1411 | char **partp, | |
1412 | char **contextp) { | |
1413 | char *c; | |
1414 | static const char prefix[] = "trackname_"; | |
1415 | ||
1416 | if(strncmp(name, prefix, strlen(prefix))) | |
1417 | return -1; /* not trackname_* at all */ | |
1418 | name += strlen(prefix); | |
1419 | /* There had better be a _ between context and part */ | |
1420 | c = strchr(name, '_'); | |
1421 | if(!c) | |
1422 | return -1; | |
1423 | /* Context is first in the pref name even though most APIs have the part | |
1424 | * first. Confusing; sorry. */ | |
1425 | *contextp = xstrndup(name, c - name); | |
1426 | ++c; | |
1427 | /* There had better NOT be a second _ */ | |
1428 | if(strchr(c, '_')) | |
1429 | return -1; | |
1430 | *partp = xstrdup(c); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | /** @brief Compute the default value for a track preference | |
1435 | * @param track Track name | |
1436 | * @param name Preference name | |
1437 | * @return Default value or 0 if none/not known | |
1438 | */ | |
1439 | static const char *trackdb__default(const char *track, const char *name) { | |
1440 | char *context, *part; | |
1441 | ||
1442 | if(!trackdb__parse_namepref(name, &part, &context)) { | |
1443 | /* We can work out the default for a trackname_ pref */ | |
1444 | return trackname_part(track, context, part); | |
1445 | } else if(!strcmp(name, "weight")) { | |
1446 | /* We know the default weight */ | |
1447 | return "90000"; | |
1448 | } else if(!strcmp(name, "pick_at_random")) { | |
1449 | /* By default everything is eligible for picking at random */ | |
1450 | return "1"; | |
1451 | } else if(!strcmp(name, "tags")) { | |
1452 | /* By default everything no track has any tags */ | |
1453 | return ""; | |
1454 | } | |
1455 | return 0; | |
1456 | } | |
1457 | ||
460b9539 | 1458 | /* set a pref (remove if value=0) */ |
1459 | int trackdb_set(const char *track, | |
1460 | const char *name, | |
1461 | const char *value) { | |
1462 | struct kvp *t, *p, *a; | |
1463 | DB_TXN *tid; | |
1464 | int err, cmp; | |
1465 | char *oldalias, *newalias, **oldtags = 0, **newtags; | |
02eaa49d | 1466 | const char *def; |
460b9539 | 1467 | |
02eaa49d RK |
1468 | /* If the value matches the default then unset instead, to keep the database |
1469 | * tidy. Older versions did not have this feature so your database may yet | |
1470 | * have some default values stored in it. */ | |
f26f062a | 1471 | if(value) { |
02eaa49d RK |
1472 | def = trackdb__default(track, name); |
1473 | if(def && !strcmp(value, def)) | |
1474 | value = 0; | |
f26f062a | 1475 | } |
f0feb22e | 1476 | |
460b9539 | 1477 | for(;;) { |
1478 | tid = trackdb_begin_transaction(); | |
1479 | if((err = gettrackdata(track, &t, &p, 0, | |
1480 | 0, tid)) == DB_LOCK_DEADLOCK) | |
1481 | goto fail; | |
1482 | if(err == DB_NOTFOUND) break; | |
1483 | if(name[0] == '_') { | |
1484 | if(kvp_set(&t, name, value)) | |
1485 | if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)) | |
1486 | goto fail; | |
1487 | } else { | |
1488 | /* get the old alias name */ | |
1489 | if(compute_alias(&oldalias, track, p, tid)) goto fail; | |
1490 | /* get the old tags */ | |
1491 | if(!strcmp(name, "tags")) | |
1492 | oldtags = parsetags(kvp_get(p, "tags")); | |
1493 | /* set the value */ | |
1494 | if(kvp_set(&p, name, value)) | |
1495 | if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0)) | |
1496 | goto fail; | |
1497 | /* compute the new alias name */ | |
1498 | if((err = compute_alias(&newalias, track, p, tid))) goto fail; | |
1499 | /* check whether alias has changed */ | |
1500 | if(!(oldalias == newalias | |
1501 | || (oldalias && newalias && !strcmp(oldalias, newalias)))) { | |
1502 | /* adjust alias records to fit change */ | |
1503 | if(oldalias | |
f0feb22e RK |
1504 | && trackdb_delkey(trackdb_tracksdb, oldalias, tid) == DB_LOCK_DEADLOCK) |
1505 | goto fail; | |
460b9539 | 1506 | if(newalias) { |
1507 | a = 0; | |
1508 | kvp_set(&a, "_alias_for", track); | |
1509 | if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail; | |
1510 | } | |
1511 | } | |
1512 | /* check whether tags have changed */ | |
1513 | if(!strcmp(name, "tags")) { | |
1514 | newtags = parsetags(value); | |
1515 | while(*oldtags || *newtags) { | |
1516 | if(*oldtags && *newtags) { | |
1517 | cmp = strcmp(*oldtags, *newtags); | |
1518 | if(!cmp) { | |
1519 | /* keeping this tag */ | |
1520 | ++oldtags; | |
1521 | ++newtags; | |
1522 | } else if(cmp < 0) | |
1523 | /* old tag fits into a gap in the new list, so delete old */ | |
1524 | goto delete_old; | |
1525 | else | |
1526 | /* new tag fits into a gap in the old list, so insert new */ | |
1527 | goto insert_new; | |
1528 | } else if(*oldtags) { | |
1529 | /* we've run out of new tags, so remaining old ones are to be | |
1530 | * deleted */ | |
1531 | delete_old: | |
1532 | if(trackdb_delkeydata(trackdb_tagsdb, | |
1533 | *oldtags, track, tid) == DB_LOCK_DEADLOCK) | |
1534 | goto fail; | |
1535 | ++oldtags; | |
1536 | } else { | |
1537 | /* we've run out of old tags, so remainig new ones are to be | |
1538 | * inserted */ | |
1539 | insert_new: | |
1540 | if(register_tag(track, *newtags, tid)) goto fail; | |
1541 | ++newtags; | |
1542 | } | |
1543 | } | |
460b9539 | 1544 | } |
1545 | } | |
1546 | err = 0; | |
1547 | break; | |
1548 | fail: | |
1549 | trackdb_abort_transaction(tid); | |
1550 | } | |
1551 | trackdb_commit_transaction(tid); | |
1552 | return err == 0 ? 0 : -1; | |
1553 | } | |
1554 | ||
1555 | /* get a pref */ | |
1556 | const char *trackdb_get(const char *track, | |
1557 | const char *name) { | |
1558 | return kvp_get(trackdb_get_all(track), name); | |
1559 | } | |
1560 | ||
1561 | /* get all prefs as a 0-terminated array */ | |
1562 | struct kvp *trackdb_get_all(const char *track) { | |
1563 | struct kvp *t, *p, **pp; | |
1564 | DB_TXN *tid; | |
1565 | ||
1566 | for(;;) { | |
1567 | tid = trackdb_begin_transaction(); | |
1568 | if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1569 | goto fail; | |
1570 | break; | |
1571 | fail: | |
1572 | trackdb_abort_transaction(tid); | |
1573 | } | |
1574 | trackdb_commit_transaction(tid); | |
1575 | for(pp = &p; *pp; pp = &(*pp)->next) | |
1576 | ; | |
1577 | *pp = t; | |
1578 | return p; | |
1579 | } | |
1580 | ||
1581 | /* resolve alias */ | |
1582 | const char *trackdb_resolve(const char *track) { | |
1583 | DB_TXN *tid; | |
1584 | const char *actual; | |
f0feb22e | 1585 | |
460b9539 | 1586 | for(;;) { |
1587 | tid = trackdb_begin_transaction(); | |
1588 | if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK) | |
1589 | goto fail; | |
1590 | break; | |
1591 | fail: | |
1592 | trackdb_abort_transaction(tid); | |
1593 | } | |
1594 | trackdb_commit_transaction(tid); | |
1595 | return actual; | |
1596 | } | |
1597 | ||
1598 | int trackdb_isalias(const char *track) { | |
1599 | const char *actual = trackdb_resolve(track); | |
1600 | ||
1601 | return strcmp(actual, track); | |
1602 | } | |
1603 | ||
1604 | /* test whether a track exists (perhaps an alias) */ | |
1605 | int trackdb_exists(const char *track) { | |
1606 | DB_TXN *tid; | |
1607 | int err; | |
1608 | ||
1609 | for(;;) { | |
1610 | tid = trackdb_begin_transaction(); | |
1611 | /* unusually, here we want the return value */ | |
1612 | if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
1613 | goto fail; | |
1614 | break; | |
1615 | fail: | |
1616 | trackdb_abort_transaction(tid); | |
1617 | } | |
1618 | trackdb_commit_transaction(tid); | |
1619 | return (err == 0); | |
1620 | } | |
1621 | ||
1622 | /* return the list of tags */ | |
1623 | char **trackdb_alltags(void) { | |
c3be4f19 RK |
1624 | int e; |
1625 | struct vector v[1]; | |
460b9539 | 1626 | |
5b3f0631 | 1627 | vector_init(v); |
c3be4f19 RK |
1628 | WITH_TRANSACTION(trackdb_listkeys(trackdb_tagsdb, v, tid)); |
1629 | return v->vec; | |
460b9539 | 1630 | } |
1631 | ||
c3be4f19 RK |
1632 | /** @brief List all the keys in @p db |
1633 | * @param db Database | |
1634 | * @param v Vector to store keys in | |
1635 | * @param tid Transaction ID | |
1636 | * @return 0 or DB_LOCK_DEADLOCK | |
1637 | */ | |
1638 | int trackdb_listkeys(DB *db, struct vector *v, DB_TXN *tid) { | |
1639 | int e; | |
460b9539 | 1640 | DBT k, d; |
c3be4f19 | 1641 | DBC *const c = trackdb_opencursor(db, tid); |
460b9539 | 1642 | |
c3be4f19 | 1643 | v->nvec = 0; |
460b9539 | 1644 | memset(&k, 0, sizeof k); |
c3be4f19 RK |
1645 | while(!(e = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP))) |
1646 | vector_append(v, xstrndup(k.data, k.size)); | |
1647 | switch(e) { | |
460b9539 | 1648 | case DB_NOTFOUND: |
1649 | break; | |
1650 | case DB_LOCK_DEADLOCK: | |
c3be4f19 | 1651 | return e; |
460b9539 | 1652 | default: |
c3be4f19 | 1653 | fatal(0, "c->c_get: %s", db_strerror(e)); |
460b9539 | 1654 | } |
c3be4f19 RK |
1655 | if((e = trackdb_closecursor(c))) |
1656 | return e; | |
1657 | vector_terminate(v); | |
460b9539 | 1658 | return 0; |
1659 | } | |
1660 | ||
1661 | /* return 1 iff sorted tag lists A and B have at least one member in common */ | |
91c9324a | 1662 | int tag_intersection(char **a, char **b) { |
460b9539 | 1663 | int cmp; |
1664 | ||
1665 | /* Same sort of logic as trackdb_set() above */ | |
1666 | while(*a && *b) { | |
1667 | if(!(cmp = strcmp(*a, *b))) return 1; | |
1668 | else if(cmp < 0) ++a; | |
1669 | else ++b; | |
1670 | } | |
1671 | return 0; | |
1672 | } | |
1673 | ||
49a773eb RK |
1674 | static pid_t choose_pid = -1; |
1675 | static int choose_fd; | |
1676 | static random_callback *choose_callback; | |
1677 | static struct dynstr choose_output; | |
1678 | static unsigned choose_complete; | |
1679 | static int choose_status; | |
1680 | #define CHOOSE_RUNNING 1 | |
1681 | #define CHOOSE_READING 2 | |
1682 | ||
1683 | static void choose_finished(ev_source *ev, unsigned which) { | |
1684 | choose_complete |= which; | |
1685 | if(choose_complete != (CHOOSE_RUNNING|CHOOSE_READING)) | |
1686 | return; | |
1687 | choose_pid = -1; | |
1688 | if(choose_status == 0 && choose_output.nvec > 0) { | |
1689 | dynstr_terminate(&choose_output); | |
1690 | choose_callback(ev, xstrdup(choose_output.vec)); | |
1691 | } else | |
1692 | choose_callback(ev, 0); | |
1693 | } | |
1694 | ||
1695 | /** @brief Called when @c disorder-choose terminates */ | |
1696 | static int choose_exited(ev_source *ev, | |
1697 | pid_t attribute((unused)) pid, | |
1698 | int status, | |
1699 | const struct rusage attribute((unused)) *rusage, | |
1700 | void attribute((unused)) *u) { | |
1701 | if(status) | |
1702 | error(0, "disorder-choose %s", wstat(status)); | |
1703 | choose_status = status; | |
1704 | choose_finished(ev, CHOOSE_RUNNING); | |
460b9539 | 1705 | return 0; |
1706 | } | |
1707 | ||
49a773eb RK |
1708 | /** @brief Called with data from @c disorder-choose pipe */ |
1709 | static int choose_readable(ev_source *ev, | |
1710 | ev_reader *reader, | |
1711 | void *ptr, | |
1712 | size_t bytes, | |
1713 | int eof, | |
1714 | void attribute((unused)) *u) { | |
1715 | dynstr_append_bytes(&choose_output, ptr, bytes); | |
1716 | ev_reader_consume(reader, bytes); | |
1717 | if(eof) | |
1718 | choose_finished(ev, CHOOSE_READING); | |
1719 | return 0; | |
1720 | } | |
460b9539 | 1721 | |
49a773eb RK |
1722 | static int choose_read_error(ev_source *ev, |
1723 | int errno_value, | |
1724 | void attribute((unused)) *u) { | |
1725 | error(errno_value, "error reading disorder-choose pipe"); | |
1726 | choose_finished(ev, CHOOSE_READING); | |
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | /** @brief Request a random track | |
1731 | * @param ev Event source | |
1732 | * @param callback Called with random track or NULL | |
1733 | * @return 0 if a request was initiated, else -1 | |
1734 | * | |
1735 | * Initiates a random track choice. @p callback will later be called back with | |
1736 | * the choice (or NULL on error). If a choice is already underway then -1 is | |
1737 | * returned and there will be no additional callback. | |
1738 | * | |
1739 | * The caller shouldn't assume that the track returned actually exists (it | |
1740 | * might be removed between the choice and the callback, or between being added | |
1741 | * to the queue and being played). | |
1742 | */ | |
1743 | int trackdb_request_random(ev_source *ev, | |
1744 | random_callback *callback) { | |
1745 | int p[2]; | |
1746 | ||
1747 | if(choose_pid != -1) | |
1748 | return -1; /* don't run concurrent chooses */ | |
1749 | xpipe(p); | |
1750 | cloexec(p[0]); | |
1751 | choose_pid = subprogram(ev, p[1], "disorder-choose", (char *)0); | |
1752 | choose_fd = p[0]; | |
1753 | xclose(p[1]); | |
1754 | choose_callback = callback; | |
1755 | choose_output.nvec = 0; | |
1756 | choose_complete = 0; | |
1757 | ev_reader_new(ev, p[0], choose_readable, choose_read_error, 0, | |
1758 | "disorder-choose reader"); /* owns p[0] */ | |
1759 | ev_child(ev, choose_pid, 0, choose_exited, 0); /* owns the subprocess */ | |
1760 | return 0; | |
460b9539 | 1761 | } |
1762 | ||
1763 | /* get a track name given the prefs. Set *used_db to 1 if we got the answer | |
1764 | * from the prefs. */ | |
1765 | static const char *getpart(const char *track, | |
1766 | const char *context, | |
1767 | const char *part, | |
1768 | const struct kvp *p, | |
1769 | int *used_db) { | |
1770 | const char *result; | |
1771 | char *pref; | |
1772 | ||
1773 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1774 | if((result = kvp_get(p, pref))) | |
1775 | *used_db = 1; | |
1776 | else | |
1777 | result = trackname_part(track, context, part); | |
1778 | assert(result != 0); | |
1779 | return result; | |
1780 | } | |
1781 | ||
1782 | /* get a track name part, like trackname_part(), but taking the database into | |
1783 | * account. */ | |
1784 | const char *trackdb_getpart(const char *track, | |
1785 | const char *context, | |
1786 | const char *part) { | |
1787 | struct kvp *p; | |
1788 | DB_TXN *tid; | |
1789 | char *pref; | |
1790 | const char *actual; | |
1791 | int used_db, err; | |
1792 | ||
1793 | /* construct the full pref */ | |
1794 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1795 | for(;;) { | |
1796 | tid = trackdb_begin_transaction(); | |
1797 | if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK) | |
1798 | goto fail; | |
1799 | break; | |
1800 | fail: | |
1801 | trackdb_abort_transaction(tid); | |
1802 | } | |
1803 | trackdb_commit_transaction(tid); | |
1804 | return getpart(actual, context, part, p, &used_db); | |
1805 | } | |
1806 | ||
1807 | /* get the raw path name for @track@ (might be an alias) */ | |
1808 | const char *trackdb_rawpath(const char *track) { | |
1809 | DB_TXN *tid; | |
1810 | struct kvp *t; | |
1811 | const char *path; | |
1812 | ||
1813 | for(;;) { | |
1814 | tid = trackdb_begin_transaction(); | |
1815 | if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1816 | goto fail; | |
1817 | break; | |
1818 | fail: | |
1819 | trackdb_abort_transaction(tid); | |
1820 | } | |
1821 | trackdb_commit_transaction(tid); | |
1822 | if(!(path = kvp_get(t, "_path"))) path = track; | |
1823 | return path; | |
1824 | } | |
1825 | ||
1826 | /* trackdb_list **************************************************************/ | |
1827 | ||
1828 | /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually | |
1829 | * readable at some point */ | |
1830 | ||
1831 | /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE. | |
1832 | * If RE is a null pointer then it matches everything. */ | |
1833 | static int track_matches(size_t dl, const char *track, size_t tl, | |
1834 | const pcre *re) { | |
1835 | int ovec[3], rc; | |
1836 | ||
1837 | if(!re) | |
1838 | return 1; | |
1839 | track += dl + 1; | |
1840 | tl -= (dl + 1); | |
1841 | switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) { | |
1842 | case PCRE_ERROR_NOMATCH: return 0; | |
1843 | default: | |
1844 | if(rc < 0) { | |
1845 | error(0, "pcre_exec returned %d, subject '%s'", rc, track); | |
1846 | return 0; | |
1847 | } | |
1848 | return 1; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | static int do_list(struct vector *v, const char *dir, | |
1853 | enum trackdb_listable what, const pcre *re, DB_TXN *tid) { | |
1854 | DBC *cursor; | |
1855 | DBT k, d; | |
1856 | size_t dl; | |
1857 | char *ptr; | |
1858 | int err; | |
1859 | size_t l, last_dir_len = 0; | |
1860 | char *last_dir = 0, *track, *alias; | |
1861 | struct kvp *p; | |
f0feb22e | 1862 | |
460b9539 | 1863 | dl = strlen(dir); |
1864 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
1865 | make_key(&k, dir); | |
1866 | prepare_data(&d); | |
1867 | /* find the first key >= dir */ | |
1868 | err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE); | |
1869 | /* keep going while we're dealing with <dir/anything> */ | |
1870 | while(err == 0 | |
1871 | && k.size > dl | |
1872 | && ((char *)k.data)[dl] == '/' | |
1873 | && !memcmp(k.data, dir, dl)) { | |
1874 | ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1)); | |
1875 | if(ptr) { | |
1876 | /* we have <dir/component/anything>, so <dir/component> is a directory */ | |
1877 | l = ptr - (char *)k.data; | |
1878 | if(what & trackdb_directories) | |
1879 | if(!(last_dir | |
1880 | && l == last_dir_len | |
1881 | && !memcmp(last_dir, k.data, l))) { | |
1882 | last_dir = xstrndup(k.data, last_dir_len = l); | |
1883 | if(track_matches(dl, k.data, l, re)) | |
1884 | vector_append(v, last_dir); | |
1885 | } | |
1886 | } else { | |
1887 | /* found a plain file */ | |
1888 | if((what & trackdb_files)) { | |
1889 | track = xstrndup(k.data, k.size); | |
1890 | if((err = trackdb_getdata(trackdb_prefsdb, | |
1891 | track, &p, tid)) == DB_LOCK_DEADLOCK) | |
1892 | goto deadlocked; | |
1893 | /* if this file has an alias in the same directory then we skip it */ | |
1894 | if((err = compute_alias(&alias, track, p, tid))) | |
1895 | goto deadlocked; | |
1896 | if(!(alias && !strcmp(d_dirname(alias), d_dirname(track)))) | |
1897 | if(track_matches(dl, k.data, k.size, re)) | |
1898 | vector_append(v, track); | |
1899 | } | |
1900 | } | |
1901 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
1902 | } | |
1903 | switch(err) { | |
1904 | case 0: | |
1905 | break; | |
1906 | case DB_NOTFOUND: | |
1907 | err = 0; | |
1908 | break; | |
1909 | case DB_LOCK_DEADLOCK: | |
1910 | error(0, "error querying database: %s", db_strerror(err)); | |
1911 | break; | |
1912 | default: | |
1913 | fatal(0, "error querying database: %s", db_strerror(err)); | |
1914 | } | |
1915 | deadlocked: | |
1916 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1917 | return err; | |
1918 | } | |
1919 | ||
1920 | /* return the directories or files below @dir@ */ | |
1921 | char **trackdb_list(const char *dir, int *np, enum trackdb_listable what, | |
1922 | const pcre *re) { | |
1923 | DB_TXN *tid; | |
1924 | int n; | |
1925 | struct vector v; | |
1926 | ||
1927 | vector_init(&v); | |
1928 | for(;;) { | |
1929 | tid = trackdb_begin_transaction(); | |
1930 | v.nvec = 0; | |
1931 | if(dir) { | |
1932 | if(do_list(&v, dir, what, re, tid)) | |
1933 | goto fail; | |
1934 | } else { | |
1935 | for(n = 0; n < config->collection.n; ++n) | |
1936 | if(do_list(&v, config->collection.s[n].root, what, re, tid)) | |
1937 | goto fail; | |
1938 | } | |
1939 | break; | |
1940 | fail: | |
1941 | trackdb_abort_transaction(tid); | |
1942 | } | |
1943 | trackdb_commit_transaction(tid); | |
1944 | vector_terminate(&v); | |
1945 | if(np) | |
1946 | *np = v.nvec; | |
1947 | return v.vec; | |
f0feb22e | 1948 | } |
460b9539 | 1949 | |
1950 | /* If S is tag:something, return something. Else return 0. */ | |
1951 | static const char *checktag(const char *s) { | |
1952 | if(!strncmp(s, "tag:", 4)) | |
1953 | return s + 4; | |
1954 | else | |
1955 | return 0; | |
1956 | } | |
1957 | ||
1958 | /* return a list of tracks containing all of the words given. If you | |
1959 | * ask for only stopwords you get no tracks. */ | |
1960 | char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) { | |
1961 | const char **w, *best = 0, *tag; | |
1962 | char **twords, **tags; | |
d1d4a182 | 1963 | char *istag; |
460b9539 | 1964 | int i, j, n, err, what; |
1965 | DBC *cursor = 0; | |
1966 | DBT k, d; | |
1967 | struct vector u, v; | |
1968 | DB_TXN *tid; | |
1969 | struct kvp *p; | |
1970 | int ntags = 0; | |
1971 | DB *db; | |
1972 | const char *dbname; | |
1973 | ||
1974 | *ntracks = 0; /* for early returns */ | |
3c82b504 | 1975 | /* normalize all the words */ |
460b9539 | 1976 | w = xmalloc(nwordlist * sizeof (char *)); |
d1d4a182 | 1977 | istag = xmalloc_noptr(nwordlist); |
460b9539 | 1978 | for(n = 0; n < nwordlist; ++n) { |
3c82b504 RK |
1979 | uint32_t *w32; |
1980 | size_t nw32; | |
f0feb22e | 1981 | |
c85b7022 | 1982 | w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0); |
a3777123 RK |
1983 | if(checktag(w[n])) { |
1984 | ++ntags; /* count up tags */ | |
1985 | /* Normalize the tag */ | |
d1d4a182 RK |
1986 | w[n] = normalize_tag(w[n] + 4, strlen(w[n] + 4)); |
1987 | istag[n] = 1; | |
a3777123 RK |
1988 | } else { |
1989 | /* Normalize the search term by removing combining characters */ | |
1990 | if(!(w32 = utf8_to_utf32(w[n], strlen(w[n]), &nw32))) | |
1991 | return 0; | |
1992 | nw32 = remove_combining_chars(w32, nw32); | |
1993 | if(!(w[n] = utf32_to_utf8(w32, nw32, 0))) | |
1994 | return 0; | |
d1d4a182 | 1995 | istag[n] = 0; |
a3777123 | 1996 | } |
460b9539 | 1997 | } |
1998 | /* find the longest non-stopword */ | |
1999 | for(n = 0; n < nwordlist; ++n) | |
d1d4a182 | 2000 | if(!istag[n] && !stopword(w[n])) |
460b9539 | 2001 | if(!best || strlen(w[n]) > strlen(best)) |
2002 | best = w[n]; | |
2003 | /* TODO: we should at least in principal be able to identify the word or tag | |
2004 | * with the least matches in log time, and choose that as our primary search | |
2005 | * term. */ | |
2006 | if(ntags && !best) { | |
2007 | /* Only tags are listed. We limit to the first and narrow down with the | |
2008 | * rest. */ | |
d1d4a182 | 2009 | best = istag[0] ? w[0] : 0; |
460b9539 | 2010 | db = trackdb_tagsdb; |
2011 | dbname = "tags"; | |
2012 | } else if(best) { | |
2013 | /* We can limit to some word. */ | |
2014 | db = trackdb_searchdb; | |
2015 | dbname = "search"; | |
2016 | } else { | |
2017 | /* Only stopwords */ | |
2018 | return 0; | |
2019 | } | |
2020 | vector_init(&u); | |
2021 | vector_init(&v); | |
2022 | for(;;) { | |
2023 | tid = trackdb_begin_transaction(); | |
2024 | /* find all the tracks that have that word */ | |
2025 | make_key(&k, best); | |
2026 | prepare_data(&d); | |
2027 | what = DB_SET; | |
2028 | v.nvec = 0; | |
2029 | cursor = trackdb_opencursor(db, tid); | |
2030 | while(!(err = cursor->c_get(cursor, &k, &d, what))) { | |
2031 | vector_append(&v, xstrndup(d.data, d.size)); | |
2032 | what = DB_NEXT_DUP; | |
2033 | } | |
2034 | switch(err) { | |
2035 | case DB_NOTFOUND: | |
2036 | err = 0; | |
2037 | break; | |
2038 | case DB_LOCK_DEADLOCK: | |
2039 | error(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
2040 | break; | |
2041 | default: | |
2042 | fatal(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
2043 | } | |
2044 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
2045 | cursor = 0; | |
2046 | /* do a naive search over that (hopefuly fairly small) list of tracks */ | |
2047 | u.nvec = 0; | |
2048 | for(n = 0; n < v.nvec; ++n) { | |
2049 | if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)) | |
2050 | goto fail; | |
2051 | else if(err) { | |
2052 | error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err)); | |
2053 | continue; | |
2054 | } | |
2055 | twords = track_to_words(v.vec[n], p); | |
2056 | tags = parsetags(kvp_get(p, "tags")); | |
2057 | for(i = 0; i < nwordlist; ++i) { | |
d1d4a182 RK |
2058 | if(istag[i]) { |
2059 | tag = w[i]; | |
460b9539 | 2060 | /* Track must have this tag */ |
2061 | for(j = 0; tags[j]; ++j) | |
2062 | if(!strcmp(tag, tags[j])) break; /* tag found */ | |
2063 | if(!tags[j]) break; /* tag not found */ | |
2064 | } else { | |
2065 | /* Track must contain this word */ | |
2066 | for(j = 0; twords[j]; ++j) | |
2067 | if(!strcmp(w[i], twords[j])) break; /* word found */ | |
2068 | if(!twords[j]) break; /* word not found */ | |
2069 | } | |
2070 | } | |
2071 | if(i >= nwordlist) /* all words found */ | |
2072 | vector_append(&u, v.vec[n]); | |
2073 | } | |
2074 | break; | |
2075 | fail: | |
2076 | trackdb_closecursor(cursor); | |
2077 | cursor = 0; | |
2078 | trackdb_abort_transaction(tid); | |
2079 | info("retrying search"); | |
2080 | } | |
2081 | trackdb_commit_transaction(tid); | |
2082 | vector_terminate(&u); | |
2083 | if(ntracks) | |
2084 | *ntracks = u.nvec; | |
2085 | return u.vec; | |
2086 | } | |
2087 | ||
2088 | /* trackdb_scan **************************************************************/ | |
2089 | ||
2090 | int trackdb_scan(const char *root, | |
2091 | int (*callback)(const char *track, | |
2092 | struct kvp *data, | |
bea6f6d5 | 2093 | struct kvp *prefs, |
460b9539 | 2094 | void *u, |
2095 | DB_TXN *tid), | |
2096 | void *u, | |
2097 | DB_TXN *tid) { | |
2098 | DBC *cursor; | |
bea6f6d5 | 2099 | DBT k, d, pd; |
d1694464 | 2100 | const size_t root_len = root ? strlen(root) : 0; |
2101 | int err, cberr; | |
bea6f6d5 | 2102 | struct kvp *data, *prefs; |
d1694464 | 2103 | const char *track; |
460b9539 | 2104 | |
2105 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
d1694464 | 2106 | if(root) |
2107 | err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d), | |
2108 | DB_SET_RANGE); | |
2109 | else { | |
2110 | memset(&k, 0, sizeof k); | |
2111 | err = cursor->c_get(cursor, &k, prepare_data(&d), | |
2112 | DB_FIRST); | |
2113 | } | |
460b9539 | 2114 | while(!err) { |
d1694464 | 2115 | if(!root |
2116 | || (k.size > root_len | |
2117 | && !strncmp(k.data, root, root_len) | |
2118 | && ((char *)k.data)[root_len] == '/')) { | |
460b9539 | 2119 | data = kvp_urldecode(d.data, d.size); |
d1694464 | 2120 | if(kvp_get(data, "_path")) { |
2121 | track = xstrndup(k.data, k.size); | |
bea6f6d5 RK |
2122 | /* TODO: trackdb_prefsdb is currently a DB_HASH. This means we have to |
2123 | * do a lookup for every single track. In fact this is quite quick: | |
2124 | * with around 10,000 tracks a complete scan is around 0.3s on my | |
2125 | * 2.2GHz Athlon. However, if it were a DB_BTREE, we could do the same | |
2126 | * linear walk as we already do over trackdb_tracksdb, and probably get | |
2127 | * even higher performance. That would require upgrade logic to | |
2128 | * translate old databases though. | |
2129 | */ | |
2130 | switch(err = trackdb_prefsdb->get(trackdb_prefsdb, tid, &k, | |
2131 | prepare_data(&pd), 0)) { | |
2132 | case 0: | |
2133 | prefs = kvp_urldecode(pd.data, pd.size); | |
2134 | break; | |
2135 | case DB_NOTFOUND: | |
2136 | prefs = 0; | |
2137 | break; | |
2138 | case DB_LOCK_DEADLOCK: | |
2139 | error(0, "getting prefs: %s", db_strerror(err)); | |
2140 | trackdb_closecursor(cursor); | |
2141 | return err; | |
2142 | default: | |
2143 | fatal(0, "getting prefs: %s", db_strerror(err)); | |
2144 | } | |
d1694464 | 2145 | /* Advance to the next track before the callback so that the callback |
2146 | * may safely delete the track */ | |
2147 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
bea6f6d5 | 2148 | if((cberr = callback(track, data, prefs, u, tid))) { |
d1694464 | 2149 | err = cberr; |
460b9539 | 2150 | break; |
d1694464 | 2151 | } |
2152 | } else | |
2153 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
460b9539 | 2154 | } else |
2155 | break; | |
2156 | } | |
2157 | trackdb_closecursor(cursor); | |
2158 | switch(err) { | |
2159 | case EINTR: | |
2160 | return err; | |
2161 | case 0: | |
2162 | case DB_NOTFOUND: | |
2163 | return 0; | |
2164 | case DB_LOCK_DEADLOCK: | |
2165 | error(0, "c->c_get: %s", db_strerror(err)); | |
2166 | return err; | |
2167 | default: | |
2168 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | /* trackdb_rescan ************************************************************/ | |
2173 | ||
dd9af5cb RK |
2174 | /** @brief Node in the list of rescan-complete callbacks */ |
2175 | struct rescanned_node { | |
2176 | struct rescanned_node *next; | |
2177 | void (*rescanned)(void *ru); | |
2178 | void *ru; | |
2179 | }; | |
2180 | ||
2181 | /** @brief List of rescan-complete callbacks */ | |
2182 | static struct rescanned_node *rescanned_list; | |
2183 | ||
2184 | /** @brief Add a rescan completion callback */ | |
2185 | void trackdb_add_rescanned(void (*rescanned)(void *ru), | |
2186 | void *ru) { | |
2187 | if(rescanned) { | |
2188 | struct rescanned_node *n = xmalloc(sizeof *n); | |
2189 | n->next = rescanned_list; | |
2190 | n->rescanned = rescanned; | |
2191 | n->ru = ru; | |
2192 | rescanned_list = n; | |
2193 | } | |
2194 | } | |
2195 | ||
460b9539 | 2196 | /* called when the rescanner terminates */ |
2197 | static int reap_rescan(ev_source attribute((unused)) *ev, | |
2198 | pid_t pid, | |
2199 | int status, | |
2200 | const struct rusage attribute((unused)) *rusage, | |
2201 | void attribute((unused)) *u) { | |
2202 | if(pid == rescan_pid) rescan_pid = -1; | |
2203 | if(status) | |
c0bcd134 | 2204 | error(0, RESCAN": %s", wstat(status)); |
460b9539 | 2205 | else |
c0bcd134 | 2206 | D((RESCAN" terminated: %s", wstat(status))); |
460b9539 | 2207 | /* Our cache of file lookups is out of date now */ |
2208 | cache_clean(&cache_files_type); | |
e025abff | 2209 | eventlog("rescanned", (char *)0); |
dd9af5cb RK |
2210 | /* Call rescanned callbacks */ |
2211 | while(rescanned_list) { | |
fdbb860d | 2212 | void (*rescanned)(void *u_) = rescanned_list->rescanned; |
dd9af5cb RK |
2213 | void *ru = rescanned_list->ru; |
2214 | ||
2215 | rescanned_list = rescanned_list->next; | |
2216 | rescanned(ru); | |
2217 | } | |
460b9539 | 2218 | return 0; |
2219 | } | |
2220 | ||
ffac51d7 RK |
2221 | /** @brief Initiate a rescan |
2222 | * @param ev Event loop or 0 to block | |
0590cedc | 2223 | * @param recheck 1 to recheck lengths, 0 to suppress check |
dd9af5cb RK |
2224 | * @param rescanned Called on completion (if not NULL) |
2225 | * @param u Passed to @p rescanned | |
ffac51d7 | 2226 | */ |
dd9af5cb RK |
2227 | void trackdb_rescan(ev_source *ev, int recheck, |
2228 | void (*rescanned)(void *ru), | |
2229 | void *ru) { | |
1a4a6350 | 2230 | int w; |
c0bcd134 | 2231 | |
460b9539 | 2232 | if(rescan_pid != -1) { |
dd9af5cb | 2233 | trackdb_add_rescanned(rescanned, ru); |
460b9539 | 2234 | error(0, "rescan already underway"); |
2235 | return; | |
2236 | } | |
ffac51d7 | 2237 | rescan_pid = subprogram(ev, -1, RESCAN, |
3d2988f6 | 2238 | recheck ? "--check" : "--no-check", |
ffac51d7 | 2239 | (char *)0); |
dd9af5cb | 2240 | trackdb_add_rescanned(rescanned, ru); |
1a4a6350 RK |
2241 | if(ev) { |
2242 | ev_child(ev, rescan_pid, 0, reap_rescan, 0); | |
2243 | D(("started rescanner")); | |
2244 | } else { | |
2245 | /* This is the first rescan, we block until it is complete */ | |
2246 | while(waitpid(rescan_pid, &w, 0) < 0 && errno == EINTR) | |
2247 | ; | |
2248 | reap_rescan(0, rescan_pid, w, 0, 0); | |
2249 | } | |
460b9539 | 2250 | } |
2251 | ||
2252 | int trackdb_rescan_cancel(void) { | |
2253 | if(rescan_pid == -1) return 0; | |
2254 | if(kill(rescan_pid, SIGTERM) < 0) | |
2255 | fatal(errno, "error killing rescanner"); | |
2256 | rescan_pid = -1; | |
2257 | return 1; | |
2258 | } | |
2259 | ||
dd9af5cb RK |
2260 | /** @brief Return true if a rescan is underway */ |
2261 | int trackdb_rescan_underway(void) { | |
2262 | return rescan_pid != -1; | |
2263 | } | |
2264 | ||
460b9539 | 2265 | /* global prefs **************************************************************/ |
2266 | ||
2267 | void trackdb_set_global(const char *name, | |
2268 | const char *value, | |
2269 | const char *who) { | |
2270 | DB_TXN *tid; | |
460b9539 | 2271 | int err; |
2272 | int state; | |
2273 | ||
460b9539 | 2274 | for(;;) { |
2275 | tid = trackdb_begin_transaction(); | |
f9635e06 RK |
2276 | if(!(err = trackdb_set_global_tid(name, value, tid))) |
2277 | break; | |
460b9539 | 2278 | trackdb_abort_transaction(tid); |
2279 | } | |
2280 | trackdb_commit_transaction(tid); | |
2281 | /* log important state changes */ | |
2282 | if(!strcmp(name, "playing")) { | |
2283 | state = !value || !strcmp(value, "yes"); | |
2284 | info("playing %s by %s", | |
2285 | state ? "enabled" : "disabled", | |
2286 | who ? who : "-"); | |
2287 | eventlog("state", state ? "enable_play" : "disable_play", (char *)0); | |
2288 | } | |
2289 | if(!strcmp(name, "random-play")) { | |
2290 | state = !value || !strcmp(value, "yes"); | |
2291 | info("random play %s by %s", | |
2292 | state ? "enabled" : "disabled", | |
2293 | who ? who : "-"); | |
2294 | eventlog("state", state ? "enable_random" : "disable_random", (char *)0); | |
2295 | } | |
460b9539 | 2296 | } |
2297 | ||
f9635e06 RK |
2298 | int trackdb_set_global_tid(const char *name, |
2299 | const char *value, | |
2300 | DB_TXN *tid) { | |
2301 | DBT k, d; | |
2302 | int err; | |
2303 | ||
2304 | memset(&k, 0, sizeof k); | |
2305 | memset(&d, 0, sizeof d); | |
2306 | k.data = (void *)name; | |
2307 | k.size = strlen(name); | |
2308 | if(value) { | |
2309 | d.data = (void *)value; | |
2310 | d.size = strlen(value); | |
2311 | } | |
2312 | if(value) | |
2313 | err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0); | |
2314 | else | |
2315 | err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0); | |
2316 | if(err == DB_LOCK_DEADLOCK) return err; | |
2317 | if(err) | |
2318 | fatal(0, "error updating database: %s", db_strerror(err)); | |
2319 | return 0; | |
2320 | } | |
2321 | ||
460b9539 | 2322 | const char *trackdb_get_global(const char *name) { |
2323 | DB_TXN *tid; | |
2324 | int err; | |
2325 | const char *r; | |
2326 | ||
2327 | for(;;) { | |
2328 | tid = trackdb_begin_transaction(); | |
2329 | if(!(err = trackdb_get_global_tid(name, tid, &r))) | |
2330 | break; | |
2331 | trackdb_abort_transaction(tid); | |
2332 | } | |
2333 | trackdb_commit_transaction(tid); | |
2334 | return r; | |
2335 | } | |
2336 | ||
f9635e06 RK |
2337 | int trackdb_get_global_tid(const char *name, |
2338 | DB_TXN *tid, | |
2339 | const char **rp) { | |
460b9539 | 2340 | DBT k, d; |
2341 | int err; | |
2342 | ||
2343 | memset(&k, 0, sizeof k); | |
2344 | k.data = (void *)name; | |
2345 | k.size = strlen(name); | |
2346 | switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k, | |
2347 | prepare_data(&d), 0)) { | |
2348 | case 0: | |
2349 | *rp = xstrndup(d.data, d.size); | |
2350 | return 0; | |
2351 | case DB_NOTFOUND: | |
2352 | *rp = 0; | |
2353 | return 0; | |
2354 | case DB_LOCK_DEADLOCK: | |
2355 | return err; | |
2356 | default: | |
f9635e06 | 2357 | fatal(0, "error reading database: %s", db_strerror(err)); |
460b9539 | 2358 | } |
2359 | } | |
2360 | ||
2a10b70b RK |
2361 | /** @brief Retrieve the most recently added tracks |
2362 | * @param ntracksp Where to put count, or 0 | |
2363 | * @param maxtracks Maximum number of tracks to retrieve | |
2364 | * @return null-terminated array of track names | |
2365 | * | |
2366 | * The most recently added track is first in the array. | |
2367 | */ | |
2368 | char **trackdb_new(int *ntracksp, | |
2369 | int maxtracks) { | |
2370 | DB_TXN *tid; | |
2371 | char **tracks; | |
2372 | ||
2373 | for(;;) { | |
2374 | tid = trackdb_begin_transaction(); | |
2375 | tracks = trackdb_new_tid(ntracksp, maxtracks, tid); | |
2376 | if(tracks) | |
2377 | break; | |
2378 | trackdb_abort_transaction(tid); | |
2379 | } | |
2380 | trackdb_commit_transaction(tid); | |
2381 | return tracks; | |
2382 | } | |
2383 | ||
2384 | /** @brief Retrieve the most recently added tracks | |
2385 | * @param ntracksp Where to put count, or 0 | |
2386 | * @param maxtracks Maximum number of tracks to retrieve, or 0 for all | |
2387 | * @param tid Transaction ID | |
2388 | * @return null-terminated array of track names, or NULL on deadlock | |
2389 | * | |
2390 | * The most recently added track is first in the array. | |
2391 | */ | |
2392 | static char **trackdb_new_tid(int *ntracksp, | |
2393 | int maxtracks, | |
2394 | DB_TXN *tid) { | |
2395 | DBC *c; | |
2396 | DBT k, d; | |
2397 | int err = 0; | |
2398 | struct vector tracks[1]; | |
2399 | ||
2400 | vector_init(tracks); | |
2401 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
2402 | while((maxtracks <= 0 || tracks->nvec < maxtracks) | |
2403 | && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV))) | |
2404 | vector_append(tracks, xstrndup(d.data, d.size)); | |
2405 | switch(err) { | |
2406 | case 0: /* hit maxtracks */ | |
2407 | case DB_NOTFOUND: /* ran out of tracks */ | |
2408 | break; | |
2409 | case DB_LOCK_DEADLOCK: | |
2410 | trackdb_closecursor(c); | |
2411 | return 0; | |
2412 | default: | |
2413 | fatal(0, "error reading noticed.db: %s", db_strerror(err)); | |
2414 | } | |
2415 | if((err = trackdb_closecursor(c))) | |
2416 | return 0; /* deadlock */ | |
2417 | vector_terminate(tracks); | |
2418 | if(ntracksp) | |
2419 | *ntracksp = tracks->nvec; | |
2420 | return tracks->vec; | |
2421 | } | |
2422 | ||
1e64e9fb RK |
2423 | /** @brief Expire noticed.db |
2424 | * @param earliest Earliest timestamp to keep | |
2425 | */ | |
2426 | void trackdb_expire_noticed(time_t earliest) { | |
2427 | DB_TXN *tid; | |
2428 | ||
2429 | for(;;) { | |
2430 | tid = trackdb_begin_transaction(); | |
2431 | if(!trackdb_expire_noticed_tid(earliest, tid)) | |
2432 | break; | |
2433 | trackdb_abort_transaction(tid); | |
2434 | } | |
2435 | trackdb_commit_transaction(tid); | |
2436 | } | |
2437 | ||
2438 | /** @brief Expire noticed.db | |
2439 | * @param earliest Earliest timestamp to keep | |
2440 | * @param tid Transaction ID | |
2441 | * @return 0 or DB_LOCK_DEADLOCK | |
2442 | */ | |
2443 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) { | |
2444 | DBC *c; | |
2445 | DBT k, d; | |
2446 | int err = 0, ret; | |
2447 | time_t when; | |
2448 | uint32_t *kk; | |
2449 | int count = 0; | |
2450 | ||
2451 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
2452 | while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) { | |
2453 | kk = k.data; | |
2454 | when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1])); | |
2455 | if(when >= earliest) | |
2456 | break; | |
2457 | if((err = c->c_del(c, 0))) { | |
2458 | if(err != DB_LOCK_DEADLOCK) | |
2459 | fatal(0, "error deleting expired noticed.db entry: %s", | |
2460 | db_strerror(err)); | |
2461 | break; | |
2462 | } | |
2463 | ++count; | |
2464 | } | |
2465 | if(err == DB_NOTFOUND) | |
2466 | err = 0; | |
2467 | if(err && err != DB_LOCK_DEADLOCK) | |
2468 | fatal(0, "error expiring noticed.db: %s", db_strerror(err)); | |
2469 | ret = err; | |
2470 | if((err = trackdb_closecursor(c))) { | |
2471 | if(err != DB_LOCK_DEADLOCK) | |
2472 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
2473 | ret = err; | |
2474 | } | |
2475 | if(!ret && count) | |
2476 | info("expired %d tracks from noticed.db", count); | |
2477 | return ret; | |
2478 | } | |
2479 | ||
460b9539 | 2480 | /* tidying up ****************************************************************/ |
2481 | ||
2482 | void trackdb_gc(void) { | |
2483 | int err; | |
2484 | char **logfiles; | |
2485 | ||
2486 | if((err = trackdb_env->txn_checkpoint(trackdb_env, | |
2487 | config->checkpoint_kbyte, | |
2488 | config->checkpoint_min, | |
2489 | 0))) | |
2490 | fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err)); | |
2491 | if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE))) | |
2492 | fatal(0, "trackdb_env->log_archive: %s", db_strerror(err)); | |
2493 | /* This makes catastrophic recovery impossible. However, the user can still | |
2494 | * preserve the important data by using disorder-dump to snapshot their | |
2495 | * prefs, and later to restore it. This is likely to have much small | |
2496 | * long-term storage requirements than record the db logfiles. */ | |
2497 | } | |
2498 | ||
f0feb22e RK |
2499 | /* user database *************************************************************/ |
2500 | ||
2501 | /** @brief Return true if @p user is trusted */ | |
2502 | static int trusted(const char *user) { | |
2503 | int n; | |
2504 | ||
2505 | for(n = 0; (n < config->trust.n | |
2506 | && strcmp(config->trust.s[n], user)); ++n) | |
2507 | ; | |
2508 | return n < config->trust.n; | |
2509 | } | |
2510 | ||
ba39faf6 RK |
2511 | /** @brief Return non-zero for a valid username |
2512 | * | |
2513 | * Currently we only allow the letters and digits in ASCII. We could be more | |
2514 | * liberal than this but it is a nice simple test. It is critical that | |
2515 | * semicolons are never allowed. | |
2516 | */ | |
2517 | static int valid_username(const char *user) { | |
2518 | if(!*user) | |
2519 | return 0; | |
2520 | while(*user) { | |
2521 | const uint8_t c = *user++; | |
2522 | /* For now we are very strict */ | |
2523 | if((c >= 'a' && c <= 'z') | |
2524 | || (c >= 'A' && c <= 'Z') | |
2525 | || (c >= '0' && c <= '9')) | |
2526 | /* ok */; | |
2527 | else | |
2528 | return 0; | |
2529 | } | |
2530 | return 1; | |
2531 | } | |
2532 | ||
f0feb22e RK |
2533 | /** @brief Add a user */ |
2534 | static int create_user(const char *user, | |
2535 | const char *password, | |
2536 | const char *rights, | |
2537 | const char *email, | |
ba39faf6 | 2538 | const char *confirmation, |
f0feb22e RK |
2539 | DB_TXN *tid, |
2540 | uint32_t flags) { | |
2541 | struct kvp *k = 0; | |
2542 | char s[64]; | |
2543 | ||
ba39faf6 RK |
2544 | /* sanity check user */ |
2545 | if(!valid_username(user)) { | |
2546 | error(0, "invalid username '%s'", user); | |
2547 | return -1; | |
2548 | } | |
0f55e905 RK |
2549 | if(parse_rights(rights, 0, 1)) { |
2550 | error(0, "invalid rights string"); | |
2551 | return -1; | |
2552 | } | |
f0feb22e RK |
2553 | /* data for this user */ |
2554 | if(password) | |
2555 | kvp_set(&k, "password", password); | |
2556 | kvp_set(&k, "rights", rights); | |
2557 | if(email) | |
2558 | kvp_set(&k, "email", email); | |
ba39faf6 RK |
2559 | if(confirmation) |
2560 | kvp_set(&k, "confirmation", confirmation); | |
f0feb22e RK |
2561 | snprintf(s, sizeof s, "%jd", (intmax_t)time(0)); |
2562 | kvp_set(&k, "created", s); | |
2563 | return trackdb_putdata(trackdb_usersdb, user, k, tid, flags); | |
2564 | } | |
2565 | ||
2566 | /** @brief Add one pre-existing user */ | |
2567 | static int one_old_user(const char *user, const char *password, | |
2568 | DB_TXN *tid) { | |
2569 | const char *rights; | |
2570 | ||
2571 | /* www-data doesn't get added */ | |
2572 | if(!strcmp(user, "www-data")) { | |
2573 | info("not adding www-data to user database"); | |
2574 | return 0; | |
2575 | } | |
2576 | /* pick rights */ | |
2577 | if(!strcmp(user, "root")) | |
2578 | rights = "all"; | |
0f55e905 RK |
2579 | else if(trusted(user)) { |
2580 | rights_type r; | |
2581 | ||
2582 | parse_rights(config->default_rights, &r, 1); | |
fce810c2 | 2583 | r &= ~(rights_type)(RIGHT_SCRATCH__MASK|RIGHT_MOVE__MASK|RIGHT_REMOVE__MASK); |
0f55e905 RK |
2584 | r |= (RIGHT_ADMIN|RIGHT_RESCAN |
2585 | |RIGHT_SCRATCH_ANY|RIGHT_MOVE_ANY|RIGHT_REMOVE_ANY); | |
2586 | rights = rights_string(r); | |
2587 | } else | |
2588 | rights = config->default_rights; | |
ba39faf6 RK |
2589 | return create_user(user, password, rights, 0/*email*/, 0/*confirmation*/, |
2590 | tid, DB_NOOVERWRITE); | |
f0feb22e RK |
2591 | } |
2592 | ||
2593 | static int trackdb_old_users_tid(DB_TXN *tid) { | |
2594 | int n; | |
2595 | ||
2596 | for(n = 0; n < config->allow.n; ++n) { | |
2597 | switch(one_old_user(config->allow.s[n].s[0], config->allow.s[n].s[1], | |
2598 | tid)) { | |
2599 | case 0: | |
2600 | info("created user %s from 'allow' directive", config->allow.s[n].s[0]); | |
2601 | break; | |
2602 | case DB_KEYEXIST: | |
2603 | error(0, "user %s already exists, delete 'allow' directive", | |
2604 | config->allow.s[n].s[0]); | |
2605 | /* This won't ever become fatal - eventually 'allow' will be | |
2606 | * disabled. */ | |
2607 | break; | |
2608 | case DB_LOCK_DEADLOCK: | |
2609 | return DB_LOCK_DEADLOCK; | |
2610 | } | |
2611 | } | |
2612 | return 0; | |
2613 | } | |
2614 | ||
2615 | /** @brief Read old 'allow' directives and copy them to the users database */ | |
2616 | void trackdb_old_users(void) { | |
2617 | int e; | |
2618 | ||
2619 | if(config->allow.n) | |
2620 | WITH_TRANSACTION(trackdb_old_users_tid(tid)); | |
2621 | } | |
2622 | ||
2623 | /** @brief Create a root user in the user database if there is none */ | |
2624 | void trackdb_create_root(void) { | |
2625 | int e; | |
2626 | uint8_t pwbin[12]; | |
2627 | char *pw; | |
2628 | ||
2629 | /* Choose a new root password */ | |
2630 | gcry_randomize(pwbin, sizeof pwbin, GCRY_STRONG_RANDOM); | |
2631 | pw = mime_to_base64(pwbin, sizeof pwbin); | |
2632 | /* Create the root user if it does not exist */ | |
ba39faf6 RK |
2633 | WITH_TRANSACTION(create_user("root", pw, "all", |
2634 | 0/*email*/, 0/*confirmation*/, | |
2635 | tid, DB_NOOVERWRITE)); | |
f0feb22e RK |
2636 | if(e == 0) |
2637 | info("created root user"); | |
2638 | } | |
2639 | ||
2640 | /** @brief Find a user's password from the database | |
2641 | * @param user Username | |
2642 | * @return Password or NULL | |
2643 | * | |
2644 | * Only works if running as a user that can read the database! | |
2645 | * | |
2646 | * If the user exists but has no password, "" is returned. | |
2647 | */ | |
2648 | const char *trackdb_get_password(const char *user) { | |
2649 | int e; | |
2650 | struct kvp *k; | |
2651 | const char *password; | |
2652 | ||
2653 | WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid)); | |
2654 | if(e) | |
2655 | return 0; | |
2656 | password = kvp_get(k, "password"); | |
2657 | return password ? password : ""; | |
2658 | } | |
2659 | ||
2660 | /** @brief Add a new user | |
2661 | * @param user Username | |
2662 | * @param password Password or NULL | |
2663 | * @param rights Initial rights | |
158d0961 | 2664 | * @param email Email address or NULL |
2665 | * @param confirmation Confirmation string or NULL | |
f0feb22e RK |
2666 | * @return 0 on success, non-0 on error |
2667 | */ | |
2668 | int trackdb_adduser(const char *user, | |
2669 | const char *password, | |
0f55e905 | 2670 | const char *rights, |
ba39faf6 RK |
2671 | const char *email, |
2672 | const char *confirmation) { | |
f0feb22e | 2673 | int e; |
f0feb22e | 2674 | |
0f55e905 | 2675 | WITH_TRANSACTION(create_user(user, password, rights, email, confirmation, |
f0feb22e RK |
2676 | tid, DB_NOOVERWRITE)); |
2677 | if(e) { | |
9c722791 | 2678 | error(0, "cannot create user '%s' because they already exist", user); |
f0feb22e RK |
2679 | return -1; |
2680 | } else { | |
2681 | if(email) | |
2682 | info("created user '%s' with rights '%s' and email address '%s'", | |
0f55e905 | 2683 | user, rights, email); |
f0feb22e | 2684 | else |
0f55e905 | 2685 | info("created user '%s' with rights '%s'", user, rights); |
f0feb22e RK |
2686 | return 0; |
2687 | } | |
2688 | } | |
2689 | ||
2690 | /** @brief Delete a user | |
2691 | * @param user User to delete | |
158d0961 | 2692 | * @return 0 on success, non-0 if the user didn't exist anyway |
f0feb22e RK |
2693 | */ |
2694 | int trackdb_deluser(const char *user) { | |
2695 | int e; | |
2696 | ||
2697 | WITH_TRANSACTION(trackdb_delkey(trackdb_usersdb, user, tid)); | |
2698 | if(e) { | |
2699 | error(0, "cannot delete user '%s' because they do not exist", user); | |
2700 | return -1; | |
2701 | } | |
2702 | info("deleted user '%s'", user); | |
2703 | return 0; | |
2704 | } | |
2705 | ||
2706 | /** @brief Get user information | |
2707 | * @param user User to query | |
2708 | * @return Linked list of user information or NULL if user does not exist | |
2709 | * | |
2710 | * Every user has at least a @c rights entry so NULL can be used to mean no | |
2711 | * such user safely. | |
2712 | */ | |
2713 | struct kvp *trackdb_getuserinfo(const char *user) { | |
2714 | int e; | |
2715 | struct kvp *k; | |
2716 | ||
2717 | WITH_TRANSACTION(trackdb_getdata(trackdb_usersdb, user, &k, tid)); | |
2718 | if(e) | |
2719 | return 0; | |
2720 | else | |
2721 | return k; | |
2722 | } | |
2723 | ||
2724 | /** @brief Edit user information | |
2725 | * @param user User to edit | |
2726 | * @param key Key to change | |
2727 | * @param value Value to set, or NULL to remove | |
2728 | * @param tid Transaction ID | |
2729 | * @return 0, DB_LOCK_DEADLOCK or DB_NOTFOUND | |
2730 | */ | |
2731 | static int trackdb_edituserinfo_tid(const char *user, const char *key, | |
2732 | const char *value, DB_TXN *tid) { | |
2733 | struct kvp *k; | |
2734 | int e; | |
2735 | ||
2736 | if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid))) | |
2737 | return e; | |
2738 | if(!kvp_set(&k, key, value)) | |
2739 | return 0; /* no change */ | |
2740 | return trackdb_putdata(trackdb_usersdb, user, k, tid, 0); | |
2741 | } | |
2742 | ||
2743 | /** @brief Edit user information | |
2744 | * @param user User to edit | |
2745 | * @param key Key to change | |
2746 | * @param value Value to set, or NULL to remove | |
2747 | * @return 0 on success, non-0 on error | |
2748 | */ | |
2749 | int trackdb_edituserinfo(const char *user, | |
2750 | const char *key, const char *value) { | |
2751 | int e; | |
2752 | ||
5df73aeb RK |
2753 | if(!strcmp(key, "rights")) { |
2754 | if(!value) { | |
2755 | error(0, "cannot remove 'rights' key from user '%s'", user); | |
2756 | return -1; | |
2757 | } | |
0f55e905 | 2758 | if(parse_rights(value, 0, 1)) { |
5df73aeb RK |
2759 | error(0, "invalid rights string"); |
2760 | return -1; | |
2761 | } | |
2762 | } else if(!strcmp(key, "email")) { | |
0517868c RK |
2763 | if(*value) { |
2764 | if(!strchr(value, '@')) { | |
2765 | error(0, "invalid email address '%s' for user '%s'", user, value); | |
2766 | return -1; | |
2767 | } | |
2768 | } else | |
2769 | value = 0; /* no email -> remove key */ | |
5df73aeb RK |
2770 | } else if(!strcmp(key, "created")) { |
2771 | error(0, "cannot change creation date for user '%s'", user); | |
2772 | return -1; | |
2773 | } else if(strcmp(key, "password") | |
2774 | && !strcmp(key, "confirmation")) { | |
2775 | error(0, "unknown user info key '%s' for user '%s'", key, user); | |
2776 | return -1; | |
2777 | } | |
f0feb22e | 2778 | WITH_TRANSACTION(trackdb_edituserinfo_tid(user, key, value, tid)); |
5df73aeb RK |
2779 | if(e) { |
2780 | error(0, "unknown user '%s'", user); | |
f0feb22e | 2781 | return -1; |
5df73aeb | 2782 | } else |
f0feb22e RK |
2783 | return 0; |
2784 | } | |
2785 | ||
c3be4f19 RK |
2786 | /** @brief List all users |
2787 | * @return NULL-terminated list of users | |
2788 | */ | |
2789 | char **trackdb_listusers(void) { | |
2790 | int e; | |
2791 | struct vector v[1]; | |
2792 | ||
2793 | vector_init(v); | |
2794 | WITH_TRANSACTION(trackdb_listkeys(trackdb_usersdb, v, tid)); | |
2795 | return v->vec; | |
2796 | } | |
2797 | ||
30365519 | 2798 | /** @brief Confirm a user registration |
2799 | * @param user Username | |
2800 | * @param confirmation Confirmation string | |
2801 | * @param rightsp Where to put user rights | |
2802 | * @param tid Transaction ID | |
2803 | * @return 0 on success, non-0 on error | |
2804 | */ | |
ba39faf6 | 2805 | static int trackdb_confirm_tid(const char *user, const char *confirmation, |
30365519 | 2806 | rights_type *rightsp, |
ba39faf6 RK |
2807 | DB_TXN *tid) { |
2808 | const char *stored_confirmation; | |
2809 | struct kvp *k; | |
2810 | int e; | |
30365519 | 2811 | const char *rights; |
ba39faf6 RK |
2812 | |
2813 | if((e = trackdb_getdata(trackdb_usersdb, user, &k, tid))) | |
2814 | return e; | |
2815 | if(!(stored_confirmation = kvp_get(k, "confirmation"))) { | |
2816 | error(0, "already confirmed user '%s'", user); | |
2817 | /* DB claims -30,800 to -30,999 so -1 should be a safe bet */ | |
2818 | return -1; | |
2819 | } | |
30365519 | 2820 | if(!(rights = kvp_get(k, "rights"))) { |
2821 | error(0, "no rights for unconfirmed user '%s'", user); | |
2822 | return -1; | |
2823 | } | |
2824 | if(parse_rights(rights, rightsp, 1)) | |
2825 | return -1; | |
ba39faf6 RK |
2826 | if(strcmp(confirmation, stored_confirmation)) { |
2827 | error(0, "wrong confirmation string for user '%s'", user); | |
2828 | return -1; | |
2829 | } | |
2830 | /* 'sall good */ | |
2831 | kvp_set(&k, "confirmation", 0); | |
2832 | return trackdb_putdata(trackdb_usersdb, user, k, tid, 0); | |
2833 | } | |
2834 | ||
2835 | /** @brief Confirm a user registration | |
2836 | * @param user Username | |
2837 | * @param confirmation Confirmation string | |
30365519 | 2838 | * @param rightsp Where to put user rights |
ba39faf6 RK |
2839 | * @return 0 on success, non-0 on error |
2840 | */ | |
30365519 | 2841 | int trackdb_confirm(const char *user, const char *confirmation, |
2842 | rights_type *rightsp) { | |
ba39faf6 RK |
2843 | int e; |
2844 | ||
30365519 | 2845 | WITH_TRANSACTION(trackdb_confirm_tid(user, confirmation, rightsp, tid)); |
ba39faf6 RK |
2846 | switch(e) { |
2847 | case 0: | |
2848 | info("registration confirmed for user '%s'", user); | |
2849 | return 0; | |
2850 | case DB_NOTFOUND: | |
2851 | error(0, "confirmation for nonexistent user '%s'", user); | |
2852 | return -1; | |
2853 | default: /* already reported */ | |
2854 | return -1; | |
2855 | } | |
2856 | } | |
2857 | ||
460b9539 | 2858 | /* |
2859 | Local Variables: | |
2860 | c-basic-offset:2 | |
2861 | comment-column:40 | |
2862 | fill-column:79 | |
2863 | indent-tabs-mode:nil | |
2864 | End: | |
2865 | */ |