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"
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
);