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"
56 static DB_TXN *global_tid;
58 static const struct option options[] = {
59 { "help", no_argument, 0, 'h' },
60 { "version", no_argument, 0, 'V' },
61 { "config", required_argument, 0, 'c' },
62 { "debug", no_argument, 0, 'd' },
63 { "no-debug", no_argument, 0, 'D' },
64 { "syslog", no_argument, 0, 's' },
65 { "no-syslog", no_argument, 0, 'S' },
66 { "check", no_argument, 0, 'K' },
67 { "no-check", no_argument, 0, 'C' },
71 /* display usage message and terminate */
72 static void help(void) {
74 " disorder-rescan [OPTIONS] [PATH...]\n"
76 " --help, -h Display usage message\n"
77 " --version, -V Display version number\n"
78 " --config PATH, -c PATH Set configuration file\n"
79 " --debug, -d Turn on debugging\n"
80 " --[no-]syslog Enable/disable logging to syslog\n"
81 " --[no-]check Enable/disable track length check\n"
83 "Rescanner for DisOrder. Not intended to be run\n"
89 /* display version number and terminate */
90 static void version(void) {
91 xprintf("%s", disorder_version_string);
96 static volatile sig_atomic_t signalled;
98 static void signal_handler(int sig) {
99 if(sig == 0) _exit(-1); /* "Cannot happen" */
103 static int aborted(void) {
104 return signalled || getppid() == 1;
107 /* Exit if our parent has gone away or we have been told to stop. */
108 static void checkabort(void) {
110 info("parent has terminated");
111 trackdb_abort_transaction(global_tid);
115 info("received signal %d", signalled);
116 trackdb_abort_transaction(global_tid);
121 /* rescan a collection */
122 static void rescan_collection(const struct collection *c) {
127 long ntracks = 0, nnew = 0;
130 info("rescanning %s with %s", c->root, c->module);
131 /* plugin runs in a subprocess */
133 if(!(pid = xfork())) {
138 scan(c->module, c->root);
139 if(fflush(stdout) < 0)
140 fatal(errno, "error writing to scanner pipe");
144 if(!(fp = fdopen(p[0], "r")))
145 fatal(errno, "error calling fdopen");
146 /* read tracks from the plugin */
147 while(!inputline("rescanner", fp, &path, 0)) {
149 /* actually we can cope relatively well within the server, but they'll go
150 * wrong in track listings */
151 if(strchr(path, '\n')) {
152 error(0, "cannot cope with tracks with newlines in the name");
155 if(!(track = any2utf8(c->encoding, path))) {
156 error(0, "cannot convert track path to UTF-8: %s", path);
159 if(config->dbversion > 1) {
160 /* We use NFC track names */
161 if(!(track = utf8_compose_canon(track, strlen(track), 0))) {
162 error(0, "cannot convert track path to NFC: %s", path);
166 D(("track %s", track));
167 /* only tracks with a known player are admitted */
168 for(n = 0; (n < config->player.n
169 && fnmatch(config->player.s[n].s[0], track, 0) != 0); ++n)
171 if(n < config->player.n) {
172 nnew += !!trackdb_notice(track, path);
174 if(ntracks % 1000 == 0)
175 info("rescanning %s, %ld tracks so far", c->root, ntracks);
180 error(errno, "error reading from scanner pipe");
185 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
187 if(r < 0) fatal(errno, "error calling waitpid");
190 error(0, "scanner subprocess: %s", wstat(w));
193 info("rescanned %s, %ld tracks, %ld new", c->root, ntracks, nnew);
198 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
202 struct recheck_state {
203 const struct collection *c;
204 long nobsolete, nnocollection, nlength;
205 struct recheck_track *tracks;
208 struct recheck_track {
209 struct recheck_track *next;
213 /* called for each non-alias track */
214 static int recheck_list_callback(const char *track,
215 struct kvp attribute((unused)) *data,
217 DB_TXN attribute((unused)) *tid) {
218 struct recheck_state *cs = u;
219 struct recheck_track *t = xmalloc(sizeof *t);
221 t->next = cs->tracks;
227 static int recheck_track_tid(struct recheck_state *cs,
228 const struct recheck_track *t,
230 const struct collection *c = cs->c;
237 if((err = trackdb_getdata(trackdb_tracksdb, t->track, &data, tid)))
239 path = kvp_get(data, "_path");
240 D(("rechecking %s", t->track));
241 /* if we're not checking a specific collection, find the right collection */
243 if(!(c = find_track_collection(t->track))) {
244 D(("obsoleting %s", t->track));
245 if((err = trackdb_obsolete(t->track, tid)))
251 /* see if the track has evaporated */
252 if(check(c->module, c->root, path) == 0) {
253 D(("obsoleting %s", t->track));
254 if((err = trackdb_obsolete(t->track, tid)))
259 /* make sure we know the length */
260 if(!kvp_get(data, "_length")) {
261 D(("recalculating length of %s", t->track));
262 for(n = 0; n < config->tracklength.n; ++n)
263 if(fnmatch(config->tracklength.s[n].s[0], t->track, 0) == 0)
265 if(n >= config->tracklength.n)
266 error(0, "no tracklength plugin found for %s", t->track);
268 length = tracklength(config->tracklength.s[n].s[1], t->track, path);
270 byte_snprintf(buffer, sizeof buffer, "%ld", length);
271 kvp_set(&data, "_length", buffer);
272 if((err = trackdb_putdata(trackdb_tracksdb, t->track, data, tid, 0)))
281 static int recheck_track(struct recheck_state *cs,
282 const struct recheck_track *t) {
285 WITH_TRANSACTION(recheck_track_tid(cs, t, tid));
289 /* recheck a collection */
290 static void recheck_collection(const struct collection *c) {
291 struct recheck_state cs;
292 const struct recheck_track *t;
296 info("rechecking %s", c->root);
298 info("rechecking all tracks");
299 /* Doing the checking inside a transaction locks up the server for much too
300 * long (because it spends lots of time thinking about each track). So we
301 * pull the full track list into memory and work from that.
303 * 100,000 tracks at, say, 80 bytes per track name, gives 8MB, which is quite
308 info("getting track list");
309 global_tid = trackdb_begin_transaction();
310 memset(&cs, 0, sizeof cs);
312 if(trackdb_scan(c ? c->root : 0, recheck_list_callback, &cs, global_tid))
316 /* Maybe we need to shut down */
318 /* Abort the transaction and try again in a bit. */
319 trackdb_abort_transaction(global_tid);
321 /* Let anything else that is going on get out of the way. */
325 info("resuming recheck of %s", c->root);
327 info("resuming global recheck");
329 trackdb_commit_transaction(global_tid);
332 for(t = cs.tracks; t; t = t->next) {
335 recheck_track(&cs, t);
339 info("rechecking %s, %ld tracks so far", c->root, nrc);
341 info("rechecking all tracks, %ld tracks so far", nrc);
345 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
346 c->root, cs.nobsolete, cs.nlength);
348 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
349 cs.nnocollection, cs.nobsolete, cs.nlength);
352 /* rescan/recheck a collection by name */
353 static void do_directory(const char *s,
354 void (*fn)(const struct collection *c)) {
357 for(n = 0; (n < config->collection.n
358 && strcmp(config->collection.s[n].root, s)); ++n)
360 if(n < config->collection.n)
361 fn(&config->collection.s[n]);
363 error(0, "no collection has root '%s'", s);
366 /* rescan/recheck all collections */
367 static void do_all(void (*fn)(const struct collection *c)) {
370 for(n = 0; n < config->collection.n; ++n)
371 fn(&config->collection.s[n]);
372 /* TODO: we need to tidy up tracks from collections now removed. We could do
373 * this two ways: either remember collections we think there are and spot
374 * their disappearance, or iterate over all tracks and gc any that don't fit
375 * into some collection.
377 * Having a way to rename collections would be rather convenient too but
378 * that's another kettle of monkeys.
382 /** @brief Expire noticed.db */
383 static void expire_noticed(void) {
387 trackdb_expire_noticed(now - config->noticed_history * 86400);
390 int main(int argc, char **argv) {
391 int n, logsyslog = !isatty(2);
397 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
398 while((n = getopt_long(argc, argv, "hVc:dDSsKC", options, 0)) >= 0) {
402 case 'c': configfile = optarg; break;
403 case 'd': debugging = 1; break;
404 case 'D': debugging = 0; break;
405 case 'S': logsyslog = 0; break;
406 case 's': logsyslog = 1; break;
407 case 'K': do_check = 1; break;
408 case 'C': do_check = 0; break;
409 default: fatal(0, "invalid option");
413 openlog(progname, LOG_PID, LOG_DAEMON);
414 log_default = &log_syslog;
416 if(config_read(0)) fatal(0, "cannot read configuration");
417 xnice(config->nice_rescan);
418 sa.sa_handler = signal_handler;
419 sa.sa_flags = SA_RESTART;
420 sigemptyset(&sa.sa_mask);
421 xsigaction(SIGTERM, &sa, 0);
422 xsigaction(SIGINT, &sa, 0);
424 trackdb_init(TRACKDB_NO_RECOVER);
425 trackdb_open(TRACKDB_NO_UPGRADE);
427 /* Rescan all collections */
428 do_all(rescan_collection);
429 /* Check that every track still exists */
431 recheck_collection(0);
432 /* Expire noticed.db */
436 /* Rescan specified collections */
437 for(n = optind; n < argc; ++n)
438 do_directory(argv[n], rescan_collection);
439 /* Check specified collections for tracks that have gone */
441 for(n = optind; n < argc; ++n)
442 do_directory(argv[n], recheck_collection);