a35ee98c47d37229d870440161ced4aeac53e7dc
2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006 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>
38 #include "configuration.h"
44 #include "inputline.h"
50 #include "trackdb-int.h"
52 static DB_TXN
*global_tid
;
54 static const struct option options
[] = {
55 { "help", no_argument
, 0, 'h' },
56 { "version", no_argument
, 0, 'V' },
57 { "config", required_argument
, 0, 'c' },
58 { "debug", no_argument
, 0, 'd' },
59 { "no-debug", no_argument
, 0, 'D' },
63 /* display usage message and terminate */
64 static void help(void) {
66 " disorder-rescan [OPTIONS] [PATH...]\n"
68 " --help, -h Display usage message\n"
69 " --version, -V Display version number\n"
70 " --config PATH, -c PATH Set configuration file\n"
71 " --debug, -d Turn on debugging\n"
73 "Rescanner for DisOrder. Not intended to be run\n"
79 /* display version number and terminate */
80 static void version(void) {
81 xprintf("disorder-rescan version %s\n", disorder_version_string
);
86 static volatile sig_atomic_t signalled
;
88 static void signal_handler(int sig
) {
89 if(sig
== 0) _exit(-1); /* "Cannot happen" */
93 static int aborted(void) {
94 return signalled
|| getppid() == 1;
97 /* Exit if our parent has gone away or we have been told to stop. */
98 static void checkabort(void) {
100 info("parent has terminated");
101 trackdb_abort_transaction(global_tid
);
105 info("received signal %d", signalled
);
106 trackdb_abort_transaction(global_tid
);
111 /* rescan a collection */
112 static void rescan_collection(const struct collection
*c
) {
117 long ntracks
= 0, nnew
= 0;
120 info("rescanning %s with %s", c
->root
, c
->module
);
121 /* plugin runs in a subprocess */
123 if(!(pid
= xfork())) {
128 scan(c
->module
, c
->root
);
129 if(fflush(stdout
) < 0)
130 fatal(errno
, "error writing to scanner pipe");
134 if(!(fp
= fdopen(p
[0], "r")))
135 fatal(errno
, "error calling fdopen");
136 /* read tracks from the plugin */
137 while(!inputline("rescanner", fp
, &path
, 0)) {
139 /* actually we can cope relatively well within the server, but they'll go
140 * wrong in track listings */
141 if(strchr(path
, '\n')) {
142 error(0, "cannot cope with tracks with newlines in the name");
145 if(!(track
= any2utf8(c
->encoding
, path
))) {
146 error(0, "cannot convert track path to UTF-8: %s", path
);
149 D(("track %s", track
));
150 /* only tracks with a known player are admitted */
151 for(n
= 0; (n
< config
->player
.n
152 && fnmatch(config
->player
.s
[n
].s
[0], track
, 0) != 0); ++n
)
154 if(n
< config
->player
.n
) {
155 nnew
+= !!trackdb_notice(track
, path
);
161 error(errno
, "error reading from scanner pipe");
166 while((r
= waitpid(pid
, &w
, 0)) == -1 && errno
== EINTR
)
168 if(r
< 0) fatal(errno
, "error calling waitpid");
171 error(0, "scanner subprocess: %s", wstat(w
));
174 info("rescanned %s, %ld tracks, %ld new", c
->root
, ntracks
, nnew
);
179 while((r
= waitpid(pid
, &w
, 0)) == -1 && errno
== EINTR
)
183 struct recheck_state
{
184 const struct collection
*c
;
185 long nobsolete
, nlength
;
188 /* called for each non-alias track */
189 static int recheck_callback(const char *track
,
193 struct recheck_state
*cs
= u
;
194 const struct collection
*c
= cs
->c
;
195 const char *path
= kvp_get(data
, "_path");
200 if(aborted()) return EINTR
;
201 D(("rechecking %s", track
));
202 /* see if the track has evaporated */
203 if(check(c
->module
, c
->root
, path
) == 0) {
204 D(("obsoleting %s", track
));
205 if((err
= trackdb_obsolete(track
, tid
))) return err
;
209 /* make sure we know the length */
210 if(!kvp_get(data
, "_length")) {
211 D(("recalculating length of %s", track
));
212 n
= tracklength(track
, path
);
214 byte_snprintf(buffer
, sizeof buffer
, "%ld", n
);
215 kvp_set(&data
, "_length", buffer
);
216 if((err
= trackdb_putdata(trackdb_tracksdb
, track
, data
, tid
, 0)))
224 /* recheck a collection */
225 static void recheck_collection(const struct collection
*c
) {
226 struct recheck_state cs
;
228 info("rechecking %s", c
->root
);
231 global_tid
= trackdb_begin_transaction();
232 memset(&cs
, 0, sizeof cs
);
234 if(trackdb_scan(c
->root
, recheck_callback
, &cs
, global_tid
)) goto fail
;
237 /* Maybe we need to shut down */
239 /* Abort the transaction and try again in a bit. */
240 trackdb_abort_transaction(global_tid
);
242 /* Let anything else that is going on get out of the way. */
245 info("resuming recheck of %s", c
->root
);
247 trackdb_commit_transaction(global_tid
);
249 info("rechecked %s, %ld obsoleted, %ld lengths calculated",
250 c
->root
, cs
.nobsolete
, cs
.nlength
);
253 /* rescan/recheck a collection by name */
254 static void do_directory(const char *s
,
255 void (*fn
)(const struct collection
*c
)) {
258 for(n
= 0; (n
< config
->collection
.n
259 && strcmp(config
->collection
.s
[n
].root
, s
)); ++n
)
261 if(n
< config
->collection
.n
)
262 fn(&config
->collection
.s
[n
]);
264 error(0, "no collection has root '%s'", s
);
267 /* rescan/recheck all collections */
268 static void do_all(void (*fn
)(const struct collection
*c
)) {
271 for(n
= 0; n
< config
->collection
.n
; ++n
)
272 fn(&config
->collection
.s
[n
]);
275 int main(int argc
, char **argv
) {
281 if(!setlocale(LC_CTYPE
, "")) fatal(errno
, "error calling setlocale");
282 while((n
= getopt_long(argc
, argv
, "hVc:dD", options
, 0)) >= 0) {
286 case 'c': configfile
= optarg
; break;
287 case 'd': debugging
= 1; break;
288 case 'D': debugging
= 0; break;
289 default: fatal(0, "invalid option");
292 /* If stderr is a TTY then log there, otherwise to syslog. */
294 openlog(progname
, LOG_PID
, LOG_DAEMON
);
295 log_default
= &log_syslog
;
297 if(config_read()) fatal(0, "cannot read configuration");
298 xnice(config
->nice_rescan
);
299 sa
.sa_handler
= signal_handler
;
300 sa
.sa_flags
= SA_RESTART
;
301 sigemptyset(&sa
.sa_mask
);
302 xsigaction(SIGTERM
, &sa
, 0);
303 xsigaction(SIGINT
, &sa
, 0);
308 do_all(rescan_collection
);
309 do_all(recheck_collection
);
312 for(n
= optind
; n
< argc
; ++n
)
313 do_directory(argv
[n
], rescan_collection
);
314 for(n
= optind
; n
< argc
; ++n
)
315 do_directory(argv
[n
], recheck_collection
);