2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <sys/types.h>
39 #include "configuration.h"
45 #include "inputline.h"
51 #include "trackdb-int.h"
52 #include "trackname.h"
54 static DB_TXN *global_tid;
56 static const struct option options[] = {
57 { "help", no_argument, 0, 'h' },
58 { "version", no_argument, 0, 'V' },
59 { "config", required_argument, 0, 'c' },
60 { "debug", no_argument, 0, 'd' },
61 { "no-debug", no_argument, 0, 'D' },
62 { "syslog", no_argument, 0, 's' },
63 { "no-syslog", no_argument, 0, 'S' },
67 /* display usage message and terminate */
68 static void help(void) {
70 " disorder-rescan [OPTIONS] [PATH...]\n"
72 " --help, -h Display usage message\n"
73 " --version, -V Display version number\n"
74 " --config PATH, -c PATH Set configuration file\n"
75 " --debug, -d Turn on debugging\n"
76 " --[no-]syslog Force logging\n"
78 "Rescanner for DisOrder. Not intended to be run\n"
84 /* display version number and terminate */
85 static void version(void) {
86 xprintf("disorder-rescan version %s\n", disorder_version_string);
91 static volatile sig_atomic_t signalled;
93 static void signal_handler(int sig) {
94 if(sig == 0) _exit(-1); /* "Cannot happen" */
98 static int aborted(void) {
99 return signalled || getppid() == 1;
102 /* Exit if our parent has gone away or we have been told to stop. */
103 static void checkabort(void) {
105 info("parent has terminated");
106 trackdb_abort_transaction(global_tid);
110 info("received signal %d", signalled);
111 trackdb_abort_transaction(global_tid);
116 /* rescan a collection */
117 static void rescan_collection(const struct collection *c) {
122 long ntracks = 0, nnew = 0;
125 info("rescanning %s with %s", c->root, c->module);
126 /* plugin runs in a subprocess */
128 if(!(pid = xfork())) {
133 scan(c->module, c->root);
134 if(fflush(stdout) < 0)
135 fatal(errno, "error writing to scanner pipe");
139 if(!(fp = fdopen(p[0], "r")))
140 fatal(errno, "error calling fdopen");
141 /* read tracks from the plugin */
142 while(!inputline("rescanner", fp, &path, 0)) {
144 /* actually we can cope relatively well within the server, but they'll go
145 * wrong in track listings */
146 if(strchr(path, '\n')) {
147 error(0, "cannot cope with tracks with newlines in the name");
150 if(!(track = any2utf8(c->encoding, path))) {
151 error(0, "cannot convert track path to UTF-8: %s", path);
154 D(("track %s", track));
155 /* only tracks with a known player are admitted */
156 for(n = 0; (n < config->player.n
157 && fnmatch(config->player.s[n].s[0], track, 0) != 0); ++n)
159 if(n < config->player.n) {
160 nnew += !!trackdb_notice(track, path);
162 if(ntracks % 1000 == 0)
163 info("rescanning %s, %ld tracks so far", c->root, ntracks);
168 error(errno, "error reading from scanner pipe");
173 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
175 if(r < 0) fatal(errno, "error calling waitpid");
178 error(0, "scanner subprocess: %s", wstat(w));
181 info("rescanned %s, %ld tracks, %ld new", c->root, ntracks, nnew);
186 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
190 struct recheck_state {
191 const struct collection *c;
192 long nobsolete, nnocollection, nlength;
195 /* called for each non-alias track */
196 static int recheck_callback(const char *track,
200 struct recheck_state *cs = u;
201 const struct collection *c = cs->c;
202 const char *path = kvp_get(data, "_path");
207 if(aborted()) return EINTR;
208 D(("rechecking %s", track));
209 /* if we're not checking a specific collection, find the right collection */
211 if(!(c = find_track_collection(track))) {
212 D(("obsoleting %s", track));
213 if((err = trackdb_obsolete(track, tid))) return err;
218 /* see if the track has evaporated */
219 if(check(c->module, c->root, path) == 0) {
220 D(("obsoleting %s", track));
221 if((err = trackdb_obsolete(track, tid))) return err;
225 /* make sure we know the length */
226 if(!kvp_get(data, "_length")) {
227 D(("recalculating length of %s", track));
228 for(n = 0; n < config->tracklength.n; ++n)
229 if(fnmatch(config->tracklength.s[n].s[0], track, 0) == 0)
231 if(n >= config->tracklength.n)
232 error(0, "no tracklength plugin found for %s", track);
234 length = tracklength(config->tracklength.s[n].s[1], track, path);
236 byte_snprintf(buffer, sizeof buffer, "%ld", length);
237 kvp_set(&data, "_length", buffer);
238 if((err = trackdb_putdata(trackdb_tracksdb, track, data, tid, 0)))
247 /* recheck a collection */
248 static void recheck_collection(const struct collection *c) {
249 struct recheck_state cs;
252 info("rechecking %s", c->root);
254 info("rechecking all tracks");
257 global_tid = trackdb_begin_transaction();
258 memset(&cs, 0, sizeof cs);
260 if(trackdb_scan(c ? c->root : 0, recheck_callback, &cs, global_tid))
264 /* Maybe we need to shut down */
266 /* Abort the transaction and try again in a bit. */
267 trackdb_abort_transaction(global_tid);
269 /* Let anything else that is going on get out of the way. */
273 info("resuming recheck of %s", c->root);
275 info("resuming global recheck");
277 trackdb_commit_transaction(global_tid);
280 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
281 c->root, cs.nobsolete, cs.nlength);
283 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
284 cs.nnocollection, cs.nobsolete, cs.nlength);
287 /* rescan/recheck a collection by name */
288 static void do_directory(const char *s,
289 void (*fn)(const struct collection *c)) {
292 for(n = 0; (n < config->collection.n
293 && strcmp(config->collection.s[n].root, s)); ++n)
295 if(n < config->collection.n)
296 fn(&config->collection.s[n]);
298 error(0, "no collection has root '%s'", s);
301 /* rescan/recheck all collections */
302 static void do_all(void (*fn)(const struct collection *c)) {
305 for(n = 0; n < config->collection.n; ++n)
306 fn(&config->collection.s[n]);
307 /* TODO: we need to tidy up tracks from collections now removed. We could do
308 * this two ways: either remember collections we think there are and spot
309 * their disappearance, or iterate over all tracks and gc any that don't fit
310 * into some collection.
312 * Having a way to rename collections would be rather convenient too but
313 * that's another kettle of monkeys.
317 /** @brief Expire noticed.db */
318 static void expire_noticed(void) {
322 trackdb_expire_noticed(now - config->noticed_history * 86400);
325 int main(int argc, char **argv) {
326 int n, logsyslog = !isatty(2);
331 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
332 while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) {
336 case 'c': configfile = optarg; break;
337 case 'd': debugging = 1; break;
338 case 'D': debugging = 0; break;
339 case 'S': logsyslog = 0; break;
340 case 's': logsyslog = 1; break;
341 default: fatal(0, "invalid option");
345 openlog(progname, LOG_PID, LOG_DAEMON);
346 log_default = &log_syslog;
348 if(config_read(0)) fatal(0, "cannot read configuration");
349 xnice(config->nice_rescan);
350 sa.sa_handler = signal_handler;
351 sa.sa_flags = SA_RESTART;
352 sigemptyset(&sa.sa_mask);
353 xsigaction(SIGTERM, &sa, 0);
354 xsigaction(SIGINT, &sa, 0);
359 /* Rescan all collections */
360 do_all(rescan_collection);
361 /* Check that every track still exists */
362 recheck_collection(0);
363 /* Expire noticed.db */
367 /* Rescan specified collections */
368 for(n = optind; n < argc; ++n)
369 do_directory(argv[n], rescan_collection);
370 /* Check specified collections for tracks that have gone */
371 for(n = optind; n < argc; ++n)
372 do_directory(argv[n], recheck_collection);