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' },
65 /* display usage message and terminate */
66 static void help(void) {
68 " disorder-rescan [OPTIONS] [PATH...]\n"
70 " --help, -h Display usage message\n"
71 " --version, -V Display version number\n"
72 " --config PATH, -c PATH Set configuration file\n"
73 " --debug, -d Turn on debugging\n"
75 "Rescanner for DisOrder. Not intended to be run\n"
81 /* display version number and terminate */
82 static void version(void) {
83 xprintf("disorder-rescan version %s\n", disorder_version_string);
88 static volatile sig_atomic_t signalled;
90 static void signal_handler(int sig) {
91 if(sig == 0) _exit(-1); /* "Cannot happen" */
95 static int aborted(void) {
96 return signalled || getppid() == 1;
99 /* Exit if our parent has gone away or we have been told to stop. */
100 static void checkabort(void) {
102 info("parent has terminated");
103 trackdb_abort_transaction(global_tid);
107 info("received signal %d", signalled);
108 trackdb_abort_transaction(global_tid);
113 /* rescan a collection */
114 static void rescan_collection(const struct collection *c) {
119 long ntracks = 0, nnew = 0;
122 info("rescanning %s with %s", c->root, c->module);
123 /* plugin runs in a subprocess */
125 if(!(pid = xfork())) {
130 scan(c->module, c->root);
131 if(fflush(stdout) < 0)
132 fatal(errno, "error writing to scanner pipe");
136 if(!(fp = fdopen(p[0], "r")))
137 fatal(errno, "error calling fdopen");
138 /* read tracks from the plugin */
139 while(!inputline("rescanner", fp, &path, 0)) {
141 /* actually we can cope relatively well within the server, but they'll go
142 * wrong in track listings */
143 if(strchr(path, '\n')) {
144 error(0, "cannot cope with tracks with newlines in the name");
147 if(!(track = any2utf8(c->encoding, path))) {
148 error(0, "cannot convert track path to UTF-8: %s", path);
151 D(("track %s", track));
152 /* only tracks with a known player are admitted */
153 for(n = 0; (n < config->player.n
154 && fnmatch(config->player.s[n].s[0], track, 0) != 0); ++n)
156 if(n < config->player.n) {
157 nnew += !!trackdb_notice(track, path);
159 if(ntracks % 1000 == 0)
160 info("rescanning %s, %ld tracks so far", c->root, ntracks);
165 error(errno, "error reading from scanner pipe");
170 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
172 if(r < 0) fatal(errno, "error calling waitpid");
175 error(0, "scanner subprocess: %s", wstat(w));
178 info("rescanned %s, %ld tracks, %ld new", c->root, ntracks, nnew);
183 while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
187 struct recheck_state {
188 const struct collection *c;
189 long nobsolete, nnocollection, nlength;
192 /* called for each non-alias track */
193 static int recheck_callback(const char *track,
197 struct recheck_state *cs = u;
198 const struct collection *c = cs->c;
199 const char *path = kvp_get(data, "_path");
204 if(aborted()) return EINTR;
205 D(("rechecking %s", track));
206 /* if we're not checking a specific collection, find the right collection */
208 if(!(c = find_track_collection(track))) {
209 D(("obsoleting %s", track));
210 if((err = trackdb_obsolete(track, tid))) return err;
215 /* see if the track has evaporated */
216 if(check(c->module, c->root, path) == 0) {
217 D(("obsoleting %s", track));
218 if((err = trackdb_obsolete(track, tid))) return err;
222 /* make sure we know the length */
223 if(!kvp_get(data, "_length")) {
224 D(("recalculating length of %s", track));
225 for(n = 0; n < config->tracklength.n; ++n)
226 if(fnmatch(config->tracklength.s[n].s[0], track, 0) == 0)
228 if(n >= config->tracklength.n)
229 error(0, "no tracklength plugin found for %s", track);
231 length = tracklength(config->tracklength.s[n].s[1], track, path);
233 byte_snprintf(buffer, sizeof buffer, "%ld", length);
234 kvp_set(&data, "_length", buffer);
235 if((err = trackdb_putdata(trackdb_tracksdb, track, data, tid, 0)))
244 /* recheck a collection */
245 static void recheck_collection(const struct collection *c) {
246 struct recheck_state cs;
249 info("rechecking %s", c->root);
251 info("rechecking all tracks");
254 global_tid = trackdb_begin_transaction();
255 memset(&cs, 0, sizeof cs);
257 if(trackdb_scan(c ? c->root : 0, recheck_callback, &cs, global_tid))
261 /* Maybe we need to shut down */
263 /* Abort the transaction and try again in a bit. */
264 trackdb_abort_transaction(global_tid);
266 /* Let anything else that is going on get out of the way. */
270 info("resuming recheck of %s", c->root);
272 info("resuming global recheck");
274 trackdb_commit_transaction(global_tid);
277 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
278 c->root, cs.nobsolete, cs.nlength);
280 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
281 cs.nnocollection, cs.nobsolete, cs.nlength);
284 /* rescan/recheck a collection by name */
285 static void do_directory(const char *s,
286 void (*fn)(const struct collection *c)) {
289 for(n = 0; (n < config->collection.n
290 && strcmp(config->collection.s[n].root, s)); ++n)
292 if(n < config->collection.n)
293 fn(&config->collection.s[n]);
295 error(0, "no collection has root '%s'", s);
298 /* rescan/recheck all collections */
299 static void do_all(void (*fn)(const struct collection *c)) {
302 for(n = 0; n < config->collection.n; ++n)
303 fn(&config->collection.s[n]);
304 /* TODO: we need to tidy up tracks from collections now removed. We could do
305 * this two ways: either remember collections we think there are and spot
306 * their disappearance, or iterate over all tracks and gc any that don't fit
307 * into some collection.
309 * Having a way to rename collections would be rather convenient too but
310 * that's another kettle of monkeys.
314 /** @brief Expire noticed.db */
315 static void expire_noticed(void) {
319 trackdb_expire_noticed(now - config->noticed_history * 86400);
322 int main(int argc, char **argv) {
328 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
329 while((n = getopt_long(argc, argv, "hVc:dD", options, 0)) >= 0) {
333 case 'c': configfile = optarg; break;
334 case 'd': debugging = 1; break;
335 case 'D': debugging = 0; break;
336 default: fatal(0, "invalid option");
339 /* If stderr is a TTY then log there, otherwise to syslog. */
341 openlog(progname, LOG_PID, LOG_DAEMON);
342 log_default = &log_syslog;
344 if(config_read(0)) fatal(0, "cannot read configuration");
345 xnice(config->nice_rescan);
346 sa.sa_handler = signal_handler;
347 sa.sa_flags = SA_RESTART;
348 sigemptyset(&sa.sa_mask);
349 xsigaction(SIGTERM, &sa, 0);
350 xsigaction(SIGINT, &sa, 0);
355 /* Rescan all collections */
356 do_all(rescan_collection);
357 /* Check that every track still exists */
358 recheck_collection(0);
359 /* Expire noticed.db */
363 /* Rescan specified collections */
364 for(n = optind; n < argc; ++n)
365 do_directory(argv[n], rescan_collection);
366 /* Check specified collections for tracks that have gone */
367 for(n = optind; n < argc; ++n)
368 do_directory(argv[n], recheck_collection);