2 * This file is part of DisOrder
3 * Copyright (C) 2005-2008 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <sys/types.h>
39 #include "configuration.h"
45 #include "inputline.h"
52 #include "trackdb-int.h"
53 #include "trackname.h"
57 static DB_TXN *global_tid;
59 static const struct option options[] = {
60 { "help", no_argument, 0, 'h' },
61 { "version", no_argument, 0, 'V' },
62 { "config", required_argument, 0, 'c' },
63 { "debug", no_argument, 0, 'd' },
64 { "no-debug", no_argument, 0, 'D' },
65 { "syslog", no_argument, 0, 's' },
66 { "no-syslog", no_argument, 0, 'S' },
67 { "check", no_argument, 0, 'K' },
68 { "no-check", no_argument, 0, 'C' },
72 /* display usage message and terminate */
73 static void help(void) {
75 " disorder-rescan [OPTIONS] [PATH...]\n"
77 " --help, -h Display usage message\n"
78 " --version, -V Display version number\n"
79 " --config PATH, -c PATH Set configuration file\n"
80 " --debug, -d Turn on debugging\n"
81 " --[no-]syslog Enable/disable logging to syslog\n"
82 " --[no-]check Enable/disable track length check\n"
84 "Rescanner for DisOrder. Not intended to be run\n"
90 static volatile sig_atomic_t signalled;
92 static void signal_handler(int sig) {
93 if(sig == 0) _exit(-1); /* "Cannot happen" */
97 static int aborted(void) {
98 return signalled || getppid() == 1;
101 /* Exit if our parent has gone away or we have been told to stop. */
102 static void checkabort(void) {
104 info("parent has terminated");
105 trackdb_abort_transaction(global_tid);
109 info("received signal %d", signalled);
110 trackdb_abort_transaction(global_tid);
115 /* rescan a collection */
116 static void rescan_collection(const struct collection *c) {
121 long ntracks = 0, nnew = 0;
124 info("rescanning %s with %s", c->root, c->module);
125 /* plugin runs in a subprocess */
127 if(!(pid = xfork())) {
132 scan(c->module, c->root);
133 if(fflush(stdout) < 0)
134 fatal(errno, "error writing to scanner pipe");
138 if(!(fp = fdopen(p[0], "r")))
139 fatal(errno, "error calling fdopen");
140 /* read tracks from the plugin */
141 while(!inputline("rescanner", fp, &path, 0)) {
143 /* actually we can cope relatively well within the server, but they'll go
144 * wrong in track listings */
145 if(strchr(path, '\n')) {
146 error(0, "cannot cope with tracks with newlines in the name");
149 if(!(track = any2utf8(c->encoding, path))) {
150 error(0, "cannot convert track path to UTF-8: %s", path);
153 if(config->dbversion > 1) {
154 /* We use NFC track names */
155 if(!(track = utf8_compose_canon(track, strlen(track), 0))) {
156 error(0, "cannot convert track path to NFC: %s", path);
160 D(("track %s", track));
161 /* only tracks with a known player are admitted */
162 for(n = 0; (n < config->player.n
163 && fnmatch(config->player.s[n].s[0], track, 0) != 0); ++n)
165 if(n < config->player.n) {
166 nnew += !!trackdb_notice(track, path);
168 if(ntracks % 1000 == 0)
169 info("rescanning %s, %ld tracks so far", c->root, ntracks);
174 error(errno, "error reading from scanner pipe");
179 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
181 if(r < 0) fatal(errno, "error calling waitpid");
184 error(0, "scanner subprocess: %s", wstat(w));
187 info("rescanned %s, %ld tracks, %ld new", c->root, ntracks, nnew);
192 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
196 struct recheck_state {
197 const struct collection *c;
198 long nobsolete, nnocollection, nlength;
199 struct recheck_track *tracks;
202 struct recheck_track {
203 struct recheck_track *next;
207 /* called for each non-alias track */
208 static int recheck_list_callback(const char *track,
209 struct kvp attribute((unused)) *data,
211 DB_TXN attribute((unused)) *tid) {
212 struct recheck_state *cs = u;
213 struct recheck_track *t = xmalloc(sizeof *t);
215 t->next = cs->tracks;
221 static int recheck_track_tid(struct recheck_state *cs,
222 const struct recheck_track *t,
224 const struct collection *c = cs->c;
231 if((err = trackdb_getdata(trackdb_tracksdb, t->track, &data, tid)))
233 path = kvp_get(data, "_path");
234 D(("rechecking %s", t->track));
235 /* if we're not checking a specific collection, find the right collection */
237 if(!(c = find_track_collection(t->track))) {
238 D(("obsoleting %s", t->track));
239 if((err = trackdb_obsolete(t->track, tid)))
245 /* see if the track has evaporated */
246 if(check(c->module, c->root, path) == 0) {
247 D(("obsoleting %s", t->track));
248 if((err = trackdb_obsolete(t->track, tid)))
253 /* make sure we know the length */
254 if(!kvp_get(data, "_length")) {
255 D(("recalculating length of %s", t->track));
256 for(n = 0; n < config->tracklength.n; ++n)
257 if(fnmatch(config->tracklength.s[n].s[0], t->track, 0) == 0)
259 if(n >= config->tracklength.n)
260 error(0, "no tracklength plugin found for %s", t->track);
262 length = tracklength(config->tracklength.s[n].s[1], t->track, path);
264 byte_snprintf(buffer, sizeof buffer, "%ld", length);
265 kvp_set(&data, "_length", buffer);
266 if((err = trackdb_putdata(trackdb_tracksdb, t->track, data, tid, 0)))
275 static int recheck_track(struct recheck_state *cs,
276 const struct recheck_track *t) {
279 WITH_TRANSACTION(recheck_track_tid(cs, t, tid));
283 /* recheck a collection */
284 static void recheck_collection(const struct collection *c) {
285 struct recheck_state cs;
286 const struct recheck_track *t;
290 info("rechecking %s", c->root);
292 info("rechecking all tracks");
293 /* Doing the checking inside a transaction locks up the server for much too
294 * long (because it spends lots of time thinking about each track). So we
295 * pull the full track list into memory and work from that.
297 * 100,000 tracks at, say, 80 bytes per track name, gives 8MB, which is quite
302 info("getting track list");
303 global_tid = trackdb_begin_transaction();
304 memset(&cs, 0, sizeof cs);
306 if(trackdb_scan(c ? c->root : 0, recheck_list_callback, &cs, global_tid))
310 /* Maybe we need to shut down */
312 /* Abort the transaction and try again in a bit. */
313 trackdb_abort_transaction(global_tid);
315 /* Let anything else that is going on get out of the way. */
319 info("resuming recheck of %s", c->root);
321 info("resuming global recheck");
323 trackdb_commit_transaction(global_tid);
326 for(t = cs.tracks; t; t = t->next) {
329 recheck_track(&cs, t);
333 info("rechecking %s, %ld tracks so far", c->root, nrc);
335 info("rechecking all tracks, %ld tracks so far", nrc);
339 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
340 c->root, cs.nobsolete, cs.nlength);
342 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
343 cs.nnocollection, cs.nobsolete, cs.nlength);
346 /* rescan/recheck a collection by name */
347 static void do_directory(const char *s,
348 void (*fn)(const struct collection *c)) {
351 for(n = 0; (n < config->collection.n
352 && strcmp(config->collection.s[n].root, s)); ++n)
354 if(n < config->collection.n)
355 fn(&config->collection.s[n]);
357 error(0, "no collection has root '%s'", s);
360 /* rescan/recheck all collections */
361 static void do_all(void (*fn)(const struct collection *c)) {
364 for(n = 0; n < config->collection.n; ++n)
365 fn(&config->collection.s[n]);
366 /* TODO: we need to tidy up tracks from collections now removed. We could do
367 * this two ways: either remember collections we think there are and spot
368 * their disappearance, or iterate over all tracks and gc any that don't fit
369 * into some collection.
371 * Having a way to rename collections would be rather convenient too but
372 * that's another kettle of monkeys.
376 /** @brief Expire noticed.db */
377 static void expire_noticed(void) {
381 trackdb_expire_noticed(now - config->noticed_history * 86400);
384 int main(int argc, char **argv) {
385 int n, logsyslog = !isatty(2);
391 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
392 while((n = getopt_long(argc, argv, "hVc:dDSsKC", options, 0)) >= 0) {
395 case 'V': version("disorder-rescan");
396 case 'c': configfile = optarg; break;
397 case 'd': debugging = 1; break;
398 case 'D': debugging = 0; break;
399 case 'S': logsyslog = 0; break;
400 case 's': logsyslog = 1; break;
401 case 'K': do_check = 1; break;
402 case 'C': do_check = 0; break;
403 default: fatal(0, "invalid option");
407 openlog(progname, LOG_PID, LOG_DAEMON);
408 log_default = &log_syslog;
410 if(config_read(0)) fatal(0, "cannot read configuration");
411 xnice(config->nice_rescan);
412 sa.sa_handler = signal_handler;
413 sa.sa_flags = SA_RESTART;
414 sigemptyset(&sa.sa_mask);
415 xsigaction(SIGTERM, &sa, 0);
416 xsigaction(SIGINT, &sa, 0);
418 trackdb_init(TRACKDB_NO_RECOVER);
419 trackdb_open(TRACKDB_NO_UPGRADE);
421 /* Rescan all collections */
422 do_all(rescan_collection);
423 /* Check that every track still exists */
425 recheck_collection(0);
426 /* Expire noticed.db */
430 /* Rescan specified collections */
431 for(n = optind; n < argc; ++n)
432 do_directory(argv[n], rescan_collection);
433 /* Check specified collections for tracks that have gone */
435 for(n = optind; n < argc; ++n)
436 do_directory(argv[n], recheck_collection);