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
,
210 struct kvp
attribute((unused
)) *prefs
,
212 DB_TXN
attribute((unused
)) *tid
) {
213 struct recheck_state
*cs
= u
;
214 struct recheck_track
*t
= xmalloc(sizeof *t
);
216 t
->next
= cs
->tracks
;
222 static int recheck_track_tid(struct recheck_state
*cs
,
223 const struct recheck_track
*t
,
225 const struct collection
*c
= cs
->c
;
232 if((err
= trackdb_getdata(trackdb_tracksdb
, t
->track
, &data
, tid
)))
234 path
= kvp_get(data
, "_path");
235 D(("rechecking %s", t
->track
));
236 /* if we're not checking a specific collection, find the right collection */
238 if(!(c
= find_track_collection(t
->track
))) {
239 D(("obsoleting %s", t
->track
));
240 if((err
= trackdb_obsolete(t
->track
, tid
)))
246 /* see if the track has evaporated */
247 if(check(c
->module
, c
->root
, path
) == 0) {
248 D(("obsoleting %s", t
->track
));
249 if((err
= trackdb_obsolete(t
->track
, tid
)))
254 /* make sure we know the length */
255 if(!kvp_get(data
, "_length")) {
256 D(("recalculating length of %s", t
->track
));
257 for(n
= 0; n
< config
->tracklength
.n
; ++n
)
258 if(fnmatch(config
->tracklength
.s
[n
].s
[0], t
->track
, 0) == 0)
260 if(n
>= config
->tracklength
.n
)
261 error(0, "no tracklength plugin found for %s", t
->track
);
263 length
= tracklength(config
->tracklength
.s
[n
].s
[1], t
->track
, path
);
265 byte_snprintf(buffer
, sizeof buffer
, "%ld", length
);
266 kvp_set(&data
, "_length", buffer
);
267 if((err
= trackdb_putdata(trackdb_tracksdb
, t
->track
, data
, tid
, 0)))
276 static int recheck_track(struct recheck_state
*cs
,
277 const struct recheck_track
*t
) {
280 WITH_TRANSACTION(recheck_track_tid(cs
, t
, tid
));
284 /* recheck a collection */
285 static void recheck_collection(const struct collection
*c
) {
286 struct recheck_state cs
;
287 const struct recheck_track
*t
;
291 info("rechecking %s", c
->root
);
293 info("rechecking all tracks");
294 /* Doing the checking inside a transaction locks up the server for much too
295 * long (because it spends lots of time thinking about each track). So we
296 * pull the full track list into memory and work from that.
298 * 100,000 tracks at, say, 80 bytes per track name, gives 8MB, which is quite
303 info("getting track list");
304 global_tid
= trackdb_begin_transaction();
305 memset(&cs
, 0, sizeof cs
);
307 if(trackdb_scan(c ? c
->root
: 0, recheck_list_callback
, &cs
, global_tid
))
311 /* Maybe we need to shut down */
313 /* Abort the transaction and try again in a bit. */
314 trackdb_abort_transaction(global_tid
);
316 /* Let anything else that is going on get out of the way. */
320 info("resuming recheck of %s", c
->root
);
322 info("resuming global recheck");
324 trackdb_commit_transaction(global_tid
);
327 for(t
= cs
.tracks
; t
; t
= t
->next
) {
330 recheck_track(&cs
, t
);
334 info("rechecking %s, %ld tracks so far", c
->root
, nrc
);
336 info("rechecking all tracks, %ld tracks so far", nrc
);
340 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
341 c
->root
, cs
.nobsolete
, cs
.nlength
);
343 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
344 cs
.nnocollection
, cs
.nobsolete
, cs
.nlength
);
347 /* rescan/recheck a collection by name */
348 static void do_directory(const char *s
,
349 void (*fn
)(const struct collection
*c
)) {
352 for(n
= 0; (n
< config
->collection
.n
353 && strcmp(config
->collection
.s
[n
].root
, s
)); ++n
)
355 if(n
< config
->collection
.n
)
356 fn(&config
->collection
.s
[n
]);
358 error(0, "no collection has root '%s'", s
);
361 /* rescan/recheck all collections */
362 static void do_all(void (*fn
)(const struct collection
*c
)) {
365 for(n
= 0; n
< config
->collection
.n
; ++n
)
366 fn(&config
->collection
.s
[n
]);
367 /* TODO: we need to tidy up tracks from collections now removed. We could do
368 * this two ways: either remember collections we think there are and spot
369 * their disappearance, or iterate over all tracks and gc any that don't fit
370 * into some collection.
372 * Having a way to rename collections would be rather convenient too but
373 * that's another kettle of monkeys.
377 /** @brief Expire noticed.db */
378 static void expire_noticed(void) {
382 trackdb_expire_noticed(now
- config
->noticed_history
* 86400);
385 int main(int argc
, char **argv
) {
386 int n
, logsyslog
= !isatty(2);
392 if(!setlocale(LC_CTYPE
, "")) fatal(errno
, "error calling setlocale");
393 while((n
= getopt_long(argc
, argv
, "hVc:dDSsKC", options
, 0)) >= 0) {
396 case 'V': version("disorder-rescan");
397 case 'c': configfile
= optarg
; break;
398 case 'd': debugging
= 1; break;
399 case 'D': debugging
= 0; break;
400 case 'S': logsyslog
= 0; break;
401 case 's': logsyslog
= 1; break;
402 case 'K': do_check
= 1; break;
403 case 'C': do_check
= 0; break;
404 default: fatal(0, "invalid option");
408 openlog(progname
, LOG_PID
, LOG_DAEMON
);
409 log_default
= &log_syslog
;
411 if(config_read(0)) fatal(0, "cannot read configuration");
412 xnice(config
->nice_rescan
);
413 sa
.sa_handler
= signal_handler
;
414 sa
.sa_flags
= SA_RESTART
;
415 sigemptyset(&sa
.sa_mask
);
416 xsigaction(SIGTERM
, &sa
, 0);
417 xsigaction(SIGINT
, &sa
, 0);
419 trackdb_init(TRACKDB_NO_RECOVER
);
420 trackdb_open(TRACKDB_NO_UPGRADE
);
422 /* Rescan all collections */
423 do_all(rescan_collection
);
424 /* Check that every track still exists */
426 recheck_collection(0);
427 /* Expire noticed.db */
431 /* Rescan specified collections */
432 for(n
= optind
; n
< argc
; ++n
)
433 do_directory(argv
[n
], rescan_collection
);
434 /* Check specified collections for tracks that have gone */
436 for(n
= optind
; n
< argc
; ++n
)
437 do_directory(argv
[n
], recheck_collection
);