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
21 #include "disorder-server.h"
23 static DB_TXN
*global_tid
;
25 static const struct option options
[] = {
26 { "help", no_argument
, 0, 'h' },
27 { "version", no_argument
, 0, 'V' },
28 { "config", required_argument
, 0, 'c' },
29 { "debug", no_argument
, 0, 'd' },
30 { "no-debug", no_argument
, 0, 'D' },
31 { "syslog", no_argument
, 0, 's' },
32 { "no-syslog", no_argument
, 0, 'S' },
33 { "check", no_argument
, 0, 'K' },
34 { "no-check", no_argument
, 0, 'C' },
38 /* display usage message and terminate */
39 static void help(void) {
41 " disorder-rescan [OPTIONS] [PATH...]\n"
43 " --help, -h Display usage message\n"
44 " --version, -V Display version number\n"
45 " --config PATH, -c PATH Set configuration file\n"
46 " --debug, -d Turn on debugging\n"
47 " --[no-]syslog Enable/disable logging to syslog\n"
48 " --[no-]check Enable/disable track length check\n"
50 "Rescanner for DisOrder. Not intended to be run\n"
56 static volatile sig_atomic_t signalled
;
58 static void signal_handler(int sig
) {
59 if(sig
== 0) _exit(-1); /* "Cannot happen" */
63 static int aborted(void) {
64 return signalled
|| getppid() == 1;
67 /* Exit if our parent has gone away or we have been told to stop. */
68 static void checkabort(void) {
70 info("parent has terminated");
71 trackdb_abort_transaction(global_tid
);
75 info("received signal %d", signalled
);
76 trackdb_abort_transaction(global_tid
);
81 /* rescan a collection */
82 static void rescan_collection(const struct collection
*c
) {
87 long ntracks
= 0, nnew
= 0;
90 info("rescanning %s with %s", c
->root
, c
->module
);
91 /* plugin runs in a subprocess */
93 if(!(pid
= xfork())) {
98 scan(c
->module
, c
->root
);
99 if(fflush(stdout
) < 0)
100 fatal(errno
, "error writing to scanner pipe");
104 if(!(fp
= fdopen(p
[0], "r")))
105 fatal(errno
, "error calling fdopen");
106 /* read tracks from the plugin */
107 while(!inputline("rescanner", fp
, &path
, 0)) {
109 /* actually we can cope relatively well within the server, but they'll go
110 * wrong in track listings */
111 if(strchr(path
, '\n')) {
112 error(0, "cannot cope with tracks with newlines in the name");
115 if(!(track
= any2utf8(c
->encoding
, path
))) {
116 error(0, "cannot convert track path to UTF-8: %s", path
);
119 if(config
->dbversion
> 1) {
120 /* We use NFC track names */
121 if(!(track
= utf8_compose_canon(track
, strlen(track
), 0))) {
122 error(0, "cannot convert track path to NFC: %s", path
);
126 D(("track %s", track
));
127 /* only tracks with a known player are admitted */
128 for(n
= 0; (n
< config
->player
.n
129 && fnmatch(config
->player
.s
[n
].s
[0], track
, 0) != 0); ++n
)
131 if(n
< config
->player
.n
) {
132 nnew
+= !!trackdb_notice(track
, path
);
134 if(ntracks
% 1000 == 0)
135 info("rescanning %s, %ld tracks so far", c
->root
, ntracks
);
140 error(errno
, "error reading from scanner pipe");
145 while((r
= waitpid(pid
, &w
, 0)) == -1 && errno
== EINTR
)
147 if(r
< 0) fatal(errno
, "error calling waitpid");
150 error(0, "scanner subprocess: %s", wstat(w
));
153 info("rescanned %s, %ld tracks, %ld new", c
->root
, ntracks
, nnew
);
158 while((r
= waitpid(pid
, &w
, 0)) == -1 && errno
== EINTR
)
162 struct recheck_state
{
163 const struct collection
*c
;
164 long nobsolete
, nnocollection
, nlength
;
165 struct recheck_track
*tracks
;
168 struct recheck_track
{
169 struct recheck_track
*next
;
173 /* called for each non-alias track */
174 static int recheck_list_callback(const char *track
,
175 struct kvp
attribute((unused
)) *data
,
176 struct kvp
attribute((unused
)) *prefs
,
178 DB_TXN
attribute((unused
)) *tid
) {
179 struct recheck_state
*cs
= u
;
180 struct recheck_track
*t
= xmalloc(sizeof *t
);
182 t
->next
= cs
->tracks
;
188 static int recheck_track_tid(struct recheck_state
*cs
,
189 const struct recheck_track
*t
,
191 const struct collection
*c
= cs
->c
;
198 if((err
= trackdb_getdata(trackdb_tracksdb
, t
->track
, &data
, tid
)))
200 path
= kvp_get(data
, "_path");
201 D(("rechecking %s", t
->track
));
202 /* if we're not checking a specific collection, find the right collection */
204 if(!(c
= find_track_collection(t
->track
))) {
205 D(("obsoleting %s", t
->track
));
206 if((err
= trackdb_obsolete(t
->track
, tid
)))
212 /* see if the track has evaporated */
213 if(check(c
->module
, c
->root
, path
) == 0) {
214 D(("obsoleting %s", t
->track
));
215 if((err
= trackdb_obsolete(t
->track
, tid
)))
220 /* make sure we know the length */
221 if(!kvp_get(data
, "_length")) {
222 D(("recalculating length of %s", t
->track
));
223 for(n
= 0; n
< config
->tracklength
.n
; ++n
)
224 if(fnmatch(config
->tracklength
.s
[n
].s
[0], t
->track
, 0) == 0)
226 if(n
>= config
->tracklength
.n
)
227 error(0, "no tracklength plugin found for %s", t
->track
);
229 length
= tracklength(config
->tracklength
.s
[n
].s
[1], t
->track
, path
);
231 byte_snprintf(buffer
, sizeof buffer
, "%ld", length
);
232 kvp_set(&data
, "_length", buffer
);
233 if((err
= trackdb_putdata(trackdb_tracksdb
, t
->track
, data
, tid
, 0)))
242 static int recheck_track(struct recheck_state
*cs
,
243 const struct recheck_track
*t
) {
246 WITH_TRANSACTION(recheck_track_tid(cs
, t
, tid
));
250 /* recheck a collection */
251 static void recheck_collection(const struct collection
*c
) {
252 struct recheck_state cs
;
253 const struct recheck_track
*t
;
257 info("rechecking %s", c
->root
);
259 info("rechecking all tracks");
260 /* Doing the checking inside a transaction locks up the server for much too
261 * long (because it spends lots of time thinking about each track). So we
262 * pull the full track list into memory and work from that.
264 * 100,000 tracks at, say, 80 bytes per track name, gives 8MB, which is quite
269 info("getting track list");
270 global_tid
= trackdb_begin_transaction();
271 memset(&cs
, 0, sizeof cs
);
273 if(trackdb_scan(c ? c
->root
: 0, recheck_list_callback
, &cs
, global_tid
))
277 /* Maybe we need to shut down */
279 /* Abort the transaction and try again in a bit. */
280 trackdb_abort_transaction(global_tid
);
282 /* Let anything else that is going on get out of the way. */
286 info("resuming recheck of %s", c
->root
);
288 info("resuming global recheck");
290 trackdb_commit_transaction(global_tid
);
293 for(t
= cs
.tracks
; t
; t
= t
->next
) {
296 recheck_track(&cs
, t
);
300 info("rechecking %s, %ld tracks so far", c
->root
, nrc
);
302 info("rechecking all tracks, %ld tracks so far", nrc
);
306 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
307 c
->root
, cs
.nobsolete
, cs
.nlength
);
309 info("rechecked all tracks, %ld no collection, %ld obsoleted, %ld lengths calculated",
310 cs
.nnocollection
, cs
.nobsolete
, cs
.nlength
);
313 /* rescan/recheck a collection by name */
314 static void do_directory(const char *s
,
315 void (*fn
)(const struct collection
*c
)) {
318 for(n
= 0; (n
< config
->collection
.n
319 && strcmp(config
->collection
.s
[n
].root
, s
)); ++n
)
321 if(n
< config
->collection
.n
)
322 fn(&config
->collection
.s
[n
]);
324 error(0, "no collection has root '%s'", s
);
327 /* rescan/recheck all collections */
328 static void do_all(void (*fn
)(const struct collection
*c
)) {
331 for(n
= 0; n
< config
->collection
.n
; ++n
)
332 fn(&config
->collection
.s
[n
]);
333 /* TODO: we need to tidy up tracks from collections now removed. We could do
334 * this two ways: either remember collections we think there are and spot
335 * their disappearance, or iterate over all tracks and gc any that don't fit
336 * into some collection.
338 * Having a way to rename collections would be rather convenient too but
339 * that's another kettle of monkeys.
343 /** @brief Expire noticed.db */
344 static void expire_noticed(void) {
348 trackdb_expire_noticed(now
- config
->noticed_history
* 86400);
351 int main(int argc
, char **argv
) {
352 int n
, logsyslog
= !isatty(2);
358 if(!setlocale(LC_CTYPE
, "")) fatal(errno
, "error calling setlocale");
359 while((n
= getopt_long(argc
, argv
, "hVc:dDSsKC", options
, 0)) >= 0) {
362 case 'V': version("disorder-rescan");
363 case 'c': configfile
= optarg
; break;
364 case 'd': debugging
= 1; break;
365 case 'D': debugging
= 0; break;
366 case 'S': logsyslog
= 0; break;
367 case 's': logsyslog
= 1; break;
368 case 'K': do_check
= 1; break;
369 case 'C': do_check
= 0; break;
370 default: fatal(0, "invalid option");
374 openlog(progname
, LOG_PID
, LOG_DAEMON
);
375 log_default
= &log_syslog
;
377 if(config_read(0)) fatal(0, "cannot read configuration");
378 xnice(config
->nice_rescan
);
379 sa
.sa_handler
= signal_handler
;
380 sa
.sa_flags
= SA_RESTART
;
381 sigemptyset(&sa
.sa_mask
);
382 xsigaction(SIGTERM
, &sa
, 0);
383 xsigaction(SIGINT
, &sa
, 0);
385 trackdb_init(TRACKDB_NO_RECOVER
);
386 trackdb_open(TRACKDB_NO_UPGRADE
);
388 /* Rescan all collections */
389 do_all(rescan_collection
);
390 /* Check that every track still exists */
392 recheck_collection(0);
393 /* Expire noticed.db */
397 /* Rescan specified collections */
398 for(n
= optind
; n
< argc
; ++n
)
399 do_directory(argv
[n
], rescan_collection
);
400 /* Check specified collections for tracks that have gone */
402 for(n
= optind
; n
< argc
; ++n
)
403 do_directory(argv
[n
], recheck_collection
);