aboutsummaryrefslogtreecommitdiffstats
path: root/src/update.c
blob: 2bab753986d44c6f407087da38b0559807d6f4da (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * Copyright (C) 2008 Max Kellermann <max@duempel.org>
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "update.h"
#include "database.h"
#include "directory.h"
#include "song.h"
#include "log.h"
#include "ls.h"
#include "path.h"
#include "playlist.h"
#include "utils.h"
#include "main_notify.h"
#include "dirvec.h"
#include "condition.h"
#include "update.h"

enum update_progress {
	UPDATE_PROGRESS_IDLE = 0,
	UPDATE_PROGRESS_RUNNING = 1,
	UPDATE_PROGRESS_DONE = 2
} progress;

/* make this dynamic?, or maybe this is big enough... */
static char *update_paths[32];
static size_t update_paths_nr;

static pthread_t update_thr;

static const int update_task_id_max = 1 << 15;

static int update_task_id;

static struct song *delete;

static struct condition delete_cond;

int isUpdatingDB(void)
{
	return (progress != UPDATE_PROGRESS_IDLE) ? update_task_id : 0;
}

static void
directory_set_stat(struct directory *dir, const struct stat *st)
{
	dir->inode = st->st_ino;
	dir->device = st->st_dev;
	dir->stat = 1;
}

static void
delete_song(struct directory *dir, struct song *del)
{
	/* first, prevent traversers in main task from getting this */
	songvec_delete(&dir->songs, del);

	/* now take it out of the playlist (in the main_task) */
	cond_enter(&delete_cond);
	assert(!delete);
	delete = del;
	wakeup_main_task();
	do { cond_wait(&delete_cond); } while (delete);
	cond_leave(&delete_cond);

	/* finally, all possible references gone, free it */
	song_free(del);
}

struct delete_data {
	char *tmp;
	struct directory *dir;
	enum update_return ret;
};

/* passed to songvec_for_each */
static int
delete_song_if_removed(struct song *song, void *_data)
{
	struct delete_data *data = _data;

	data->tmp = song_get_url(song, data->tmp);
	assert(data->tmp);

	if (!isFile(data->tmp, NULL)) {
		delete_song(data->dir, song);
		data->ret = UPDATE_RETURN_UPDATED;
	}
	return 0;
}

static enum update_return
removeDeletedFromDirectory(char *path_max_tmp, struct directory *directory)
{
	enum update_return ret = UPDATE_RETURN_NOUPDATE;
	int i;
	struct dirvec *dv = &directory->children;
	struct delete_data data;

	for (i = dv->nr; --i >= 0; ) {
		if (isDir(dv->base[i]->path))
			continue;
		LOG("removing directory: %s\n", dv->base[i]->path);
		dirvec_delete(dv, dv->base[i]);
		ret = UPDATE_RETURN_UPDATED;
	}

	data.dir = directory;
	data.tmp = path_max_tmp;
	data.ret = ret;
	songvec_for_each(&directory->songs, delete_song_if_removed, &data);

	return data.ret;
}

static const char *opendir_path(char *path_max_tmp, const char *dirname)
{
	if (*dirname != '\0')
		return rmp2amp_r(path_max_tmp,
		                 utf8_to_fs_charset(path_max_tmp, dirname));
	return musicDir;
}

static int
statDirectory(struct directory *dir)
{
	struct stat st;

	if (myStat(getDirectoryPath(dir), &st) < 0)
		return -1;

	directory_set_stat(dir, &st);

	return 0;
}

static int
inodeFoundInParent(struct directory *parent, ino_t inode, dev_t device)
{
	while (parent) {
		if (!parent->stat && statDirectory(parent) < 0)
			return -1;
		if (parent->inode == inode && parent->device == device) {
			DEBUG("recursive directory found\n");
			return 1;
		}
		parent = parent->parent;
	}

	return 0;
}

static enum update_return
addSubDirectoryToDirectory(struct directory *directory,
			   const char *name, struct stat *st)
{
	struct directory *subDirectory;

	if (inodeFoundInParent(directory, st->st_ino, st->st_dev))
		return UPDATE_RETURN_NOUPDATE;

	subDirectory = newDirectory(name, directory);
	directory_set_stat(subDirectory, st);

	if (updateDirectory(subDirectory) != UPDATE_RETURN_UPDATED) {
		freeDirectory(subDirectory);
		return UPDATE_RETURN_NOUPDATE;
	}

	dirvec_add(&directory->children, subDirectory);

	return UPDATE_RETURN_UPDATED;
}

static enum update_return
addToDirectory(struct directory *directory, const char *name)
{
	struct stat st;

	if (myStat(name, &st)) {
		DEBUG("failed to stat %s: %s\n", name, strerror(errno));
		return UPDATE_RETURN_ERROR;
	}

	if (S_ISREG(st.st_mode) &&
	    hasMusicSuffix(name, 0) && isMusic(name, NULL, 0)) {
		struct song *song;
		const char *shortname = mpd_basename(name);

		if (!(song = song_file_load(shortname, directory)))
			return -1;
		songvec_add(&directory->songs, song);
		LOG("added %s\n", name);
		return UPDATE_RETURN_UPDATED;
	} else if (S_ISDIR(st.st_mode)) {
		return addSubDirectoryToDirectory(directory, name, &st);
	}

	DEBUG("addToDirectory: %s is not a directory or music\n", name);

	return UPDATE_RETURN_ERROR;
}

static enum update_return
updateInDirectory(struct directory *directory, const char *name)
{
	struct song *song;
	struct stat st;

	if (myStat(name, &st))
		return UPDATE_RETURN_ERROR;

	if (S_ISREG(st.st_mode) && hasMusicSuffix(name, 0)) {
		const char *shortname = mpd_basename(name);

		if (!(song = songvec_find(&directory->songs, shortname))) {
			addToDirectory(directory, name);
			return UPDATE_RETURN_UPDATED;
		} else if (st.st_mtime != song->mtime) {
			LOG("updating %s\n", name);
			if (!song_file_update(song))
				delete_song(directory, song);
			return UPDATE_RETURN_UPDATED;
		}
	} else if (S_ISDIR(st.st_mode)) {
		struct directory *subdir = dirvec_find(&directory->children, name);
		if (subdir) {
			assert(directory == subdir->parent);
			directory_set_stat(subdir, &st);
			return updateDirectory(subdir);
		} else {
			return addSubDirectoryToDirectory(directory, name, &st);
		}
	}

	return UPDATE_RETURN_NOUPDATE;
}

/* we don't look at hidden files nor files with newlines in them */
static int skip_path(const char *path)
{
	return (path[0] == '.' || strchr(path, '\n')) ? 1 : 0;
}

enum update_return
updateDirectory(struct directory *directory)
{
	bool was_empty = directory_is_empty(directory);
	DIR *dir;
	const char *dirname = getDirectoryPath(directory);
	struct dirent *ent;
	char path_max_tmp[MPD_PATH_MAX];
	enum update_return ret = UPDATE_RETURN_NOUPDATE;

	if (!directory->stat && statDirectory(directory) < 0)
		return UPDATE_RETURN_ERROR;
	else if (inodeFoundInParent(directory->parent,
				    directory->inode,
				    directory->device))
		return UPDATE_RETURN_ERROR;

	dir = opendir(opendir_path(path_max_tmp, dirname));
	if (!dir)
		return UPDATE_RETURN_ERROR;

	if (!was_empty &&
	    removeDeletedFromDirectory(path_max_tmp, directory) > 0)
		ret = UPDATE_RETURN_UPDATED;

	while ((ent = readdir(dir))) {
		char *utf8;
		if (skip_path(ent->d_name))
			continue;

		utf8 = fs_charset_to_utf8(path_max_tmp, ent->d_name);
		if (!utf8)
			continue;

		if (directory->path)
			utf8 = pfx_dir(path_max_tmp, utf8, strlen(utf8),
			               dirname, strlen(dirname));
		if (was_empty) {
			if (addToDirectory(directory, path_max_tmp) ==
			    UPDATE_RETURN_UPDATED)
				ret = UPDATE_RETURN_UPDATED;
		} else {
			if (updateInDirectory(directory, path_max_tmp) > 0)
				ret = UPDATE_RETURN_UPDATED;
		}
	}

	closedir(dir);

	return ret;
}

static struct directory *
addDirectoryPathToDB(const char *utf8path)
{
	char path_max_tmp[MPD_PATH_MAX];
	char *parent;
	struct directory *parentDirectory;
	struct directory *directory;
	struct song *conflicting;

	parent = parent_path(path_max_tmp, utf8path);

	if (strlen(parent) == 0)
		parentDirectory = db_get_root();
	else
		parentDirectory = addDirectoryPathToDB(parent);

	if (!parentDirectory)
		return NULL;

	if ((directory = dirvec_find(&parentDirectory->children, utf8path))) {
		assert(parentDirectory == directory->parent);
	} else {
		struct stat st;
		if (myStat(utf8path, &st) < 0 ||
		    inodeFoundInParent(parentDirectory, st.st_ino, st.st_dev))
			return NULL;
		else {
			directory = newDirectory(utf8path, parentDirectory);
			dirvec_add(&parentDirectory->children, directory);
		}
	}

	/* if we're adding directory paths, make sure to delete filenames
	   with potentially the same name */
	conflicting = songvec_find(&parentDirectory->songs,
	                           mpd_basename(directory->path));
	if (conflicting)
		delete_song(parentDirectory, conflicting);

	return directory;
}

static struct directory *
addParentPathToDB(const char *utf8path)
{
	char *parent;
	char path_max_tmp[MPD_PATH_MAX];
	struct directory *parentDirectory;

	parent = parent_path(path_max_tmp, utf8path);

	if (strlen(parent) == 0)
		parentDirectory = db_get_root();
	else
		parentDirectory = addDirectoryPathToDB(parent);

	if (!parentDirectory)
		return NULL;

	return (struct directory *) parentDirectory;
}

static enum update_return updatePath(const char *utf8path)
{
	struct directory *directory;
	struct directory *parentDirectory;
	struct song *song;
	char *path = sanitizePathDup(utf8path);
	time_t mtime;
	enum update_return ret = UPDATE_RETURN_NOUPDATE;
	char path_max_tmp[MPD_PATH_MAX];

	if (NULL == path)
		return UPDATE_RETURN_ERROR;

	/* if path is in the DB try to update it, or else delete it */
	if ((directory = db_get_directory(path))) {
		parentDirectory = directory->parent;

		/* if this update directory is successfull, we are done */
		ret = updateDirectory(directory);
		if (ret != UPDATE_RETURN_ERROR) {
			free(path);
			sortDirectory(directory);
			return ret;
		}
		/* we don't want to delete the root directory */
		else if (directory == db_get_root()) {
			free(path);
			return UPDATE_RETURN_NOUPDATE;
		}
		/* if updateDirectory fails, means we should delete it */
		else {
			LOG("removing directory: %s\n", path);
			dirvec_delete(&parentDirectory->children, directory);
			ret = UPDATE_RETURN_UPDATED;
			/* don't return, path maybe a song now */
		}
	} else if ((song = get_get_song(path))) {
		parentDirectory = song->parent;
		if (!parentDirectory->stat
		    && statDirectory(parentDirectory) < 0) {
			free(path);
			return UPDATE_RETURN_NOUPDATE;
		}
		/* if this song update is successful, we are done */
		else if (!inodeFoundInParent(parentDirectory->parent,
						 parentDirectory->inode,
						 parentDirectory->device) &&
			 isMusic(song_get_url(song, path_max_tmp), &mtime, 0)) {
			free(path);
			if (song->mtime == mtime)
				return UPDATE_RETURN_NOUPDATE;
			else if (song_file_update(song))
				return UPDATE_RETURN_UPDATED;
			else {
				delete_song(parentDirectory, song);
				return UPDATE_RETURN_UPDATED;
			}
		}
		/* if updateDirectory fails, means we should delete it */
		else {
			delete_song(parentDirectory, song);
			ret = UPDATE_RETURN_UPDATED;
			/* don't return, path maybe a directory now */
		}
	}

	/* path not found in the db, see if it actually exists on the fs.
	 * Also, if by chance a directory was replaced by a file of the same
	 * name or vice versa, we need to add it to the db
	 */
	if (isDir(path) || isMusic(path, NULL, 0)) {
		parentDirectory = addParentPathToDB(path);
		if (!parentDirectory || (!parentDirectory->stat &&
					 statDirectory(parentDirectory) < 0)) {
		} else if (0 == inodeFoundInParent(parentDirectory->parent,
						   parentDirectory->inode,
						   parentDirectory->device)
			   && addToDirectory(parentDirectory, path)
			   == UPDATE_RETURN_UPDATED) {
			ret = UPDATE_RETURN_UPDATED;
		}
	}

	free(path);

	return ret;
}

static void * update_task(void *_path)
{
	enum update_return ret = UPDATE_RETURN_NOUPDATE;

	if (_path) {
		ret = updatePath((char *)_path);
		free(_path);
	} else {
		ret = updateDirectory(db_get_root());
	}

	if (ret == UPDATE_RETURN_UPDATED && db_save() < 0)
		ret = UPDATE_RETURN_ERROR;
	progress = UPDATE_PROGRESS_DONE;
	wakeup_main_task();
	return (void *)ret;
}

static void spawn_update_task(char *path)
{
	pthread_attr_t attr;

	assert(pthread_equal(pthread_self(), main_task));

	progress = UPDATE_PROGRESS_RUNNING;
	pthread_attr_init(&attr);
	if (pthread_create(&update_thr, &attr, update_task, path))
		FATAL("Failed to spawn update task: %s\n", strerror(errno));
	if (++update_task_id > update_task_id_max)
		update_task_id = 1;
	DEBUG("spawned thread for update job id %i\n", update_task_id);
}

int directory_update_init(char *path)
{
	assert(pthread_equal(pthread_self(), main_task));

	if (progress != UPDATE_PROGRESS_IDLE) {
		int next_task_id;

		if (!path)
			return -1;
		if (update_paths_nr == ARRAY_SIZE(update_paths))
			return -1;
		assert(update_paths_nr < ARRAY_SIZE(update_paths));
		update_paths[update_paths_nr++] = path;
		next_task_id = update_task_id + update_paths_nr;

		return next_task_id > update_task_id_max ?  1 : next_task_id;
	}
	spawn_update_task(path);
	return update_task_id;
}

void reap_update_task(void)
{
	enum update_return ret;

	assert(pthread_equal(pthread_self(), main_task));

	cond_enter(&delete_cond);
	if (delete) {
		char tmp[MPD_PATH_MAX];
		LOG("removing: %s\n", song_get_url(delete, tmp));
		deleteASongFromPlaylist(delete);
		delete = NULL;
		cond_signal_async(&delete_cond);
	}
	cond_leave(&delete_cond);

	if (progress != UPDATE_PROGRESS_DONE)
		return;
	if (pthread_join(update_thr, (void **)&ret))
		FATAL("error joining update thread: %s\n", strerror(errno));
	if (ret == UPDATE_RETURN_UPDATED)
		playlistVersionChange();

	if (update_paths_nr) {
		char *path = update_paths[0];
		memmove(&update_paths[0], &update_paths[1],
		        --update_paths_nr * sizeof(char *));
		spawn_update_task(path);
	} else {
		progress = UPDATE_PROGRESS_IDLE;
	}
}