2008-10-08 11:07:35 +02:00
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/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* Copyright (C) 2008 Max Kellermann <max@duempel.org>
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "database.h"
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#include "directory.h"
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2008-10-09 15:23:37 +02:00
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#include "directory_save.h"
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2008-10-08 11:07:35 +02:00
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#include "song.h"
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#include "conf.h"
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#include "log.h"
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#include "ls.h"
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#include "path.h"
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#include "stats.h"
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#include "utils.h"
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#include "dbUtils.h"
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#include "update.h"
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2008-10-09 19:11:54 +02:00
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#include "main_notify.h"
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2008-10-08 11:07:35 +02:00
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#include <assert.h>
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#include <string.h>
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2008-10-20 22:18:40 +02:00
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#include <glib.h>
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2008-10-08 11:07:35 +02:00
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static struct directory *music_root;
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static time_t directory_dbModTime;
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2008-10-08 11:07:55 +02:00
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void
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db_init(void)
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2008-10-08 11:07:35 +02:00
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{
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2008-10-09 19:20:05 +02:00
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unsigned ret;
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2008-10-09 19:11:54 +02:00
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2008-10-08 11:08:16 +02:00
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music_root = directory_new("", NULL);
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2008-10-09 19:11:54 +02:00
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ret = directory_update_init(NULL);
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2008-10-09 19:17:44 +02:00
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if (ret == 0)
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2008-10-09 19:11:54 +02:00
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FATAL("directory update failed\n");
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do {
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wait_main_task();
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reap_update_task();
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} while (isUpdatingDB());
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2008-10-08 11:07:35 +02:00
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stats.numberOfSongs = countSongsIn(NULL);
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stats.dbPlayTime = sumSongTimesIn(NULL);
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}
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2008-10-08 11:07:55 +02:00
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void
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db_finish(void)
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2008-10-08 11:07:35 +02:00
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{
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2008-10-08 11:07:58 +02:00
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directory_free(music_root);
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2008-10-08 11:07:35 +02:00
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}
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struct directory *
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2008-10-08 11:07:55 +02:00
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db_get_root(void)
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2008-10-08 11:07:35 +02:00
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{
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assert(music_root != NULL);
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return music_root;
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}
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struct directory *
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2008-10-08 11:07:55 +02:00
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db_get_directory(const char *name)
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2008-10-08 11:07:35 +02:00
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{
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if (name == NULL)
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return music_root;
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2008-10-08 11:07:58 +02:00
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return directory_get_directory(music_root, name);
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2008-10-08 11:07:35 +02:00
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}
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struct song *
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2008-10-09 16:26:09 +02:00
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db_get_song(const char *file)
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2008-10-08 11:07:35 +02:00
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{
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struct song *song = NULL;
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struct directory *directory;
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char *dir = NULL;
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char *duplicated = xstrdup(file);
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char *shortname = strrchr(duplicated, '/');
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DEBUG("get song: %s\n", file);
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if (!shortname) {
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shortname = duplicated;
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} else {
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*shortname = '\0';
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++shortname;
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dir = duplicated;
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}
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2008-10-08 11:07:55 +02:00
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if (!(directory = db_get_directory(dir)))
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2008-10-08 11:07:35 +02:00
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goto out;
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if (!(song = songvec_find(&directory->songs, shortname)))
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goto out;
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assert(song->parent == directory);
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out:
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free(duplicated);
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return song;
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}
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int
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2008-10-08 11:07:55 +02:00
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db_walk(const char *name,
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int (*forEachSong)(struct song *, void *),
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int (*forEachDir)(struct directory *, void *), void *data)
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2008-10-08 11:07:35 +02:00
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{
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struct directory *directory;
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2008-10-08 11:07:55 +02:00
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if ((directory = db_get_directory(name)) == NULL) {
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2008-10-08 11:07:35 +02:00
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struct song *song;
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2008-10-09 16:26:09 +02:00
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if ((song = db_get_song(name)) && forEachSong) {
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2008-10-08 11:07:35 +02:00
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return forEachSong(song, data);
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}
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return -1;
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}
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2008-10-08 11:07:58 +02:00
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return directory_walk(directory, forEachSong, forEachDir, data);
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2008-10-08 11:07:35 +02:00
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}
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2008-10-08 11:07:55 +02:00
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static char *
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db_get_file(void)
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2008-10-08 11:07:35 +02:00
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{
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ConfigParam *param = parseConfigFilePath(CONF_DB_FILE, 1);
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assert(param);
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assert(param->value);
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return param->value;
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}
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2008-10-08 11:07:55 +02:00
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int
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db_check(void)
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2008-10-08 11:07:35 +02:00
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{
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struct stat st;
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2008-10-08 11:07:55 +02:00
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char *dbFile = db_get_file();
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2008-10-08 11:07:35 +02:00
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/* Check if the file exists */
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if (access(dbFile, F_OK)) {
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/* If the file doesn't exist, we can't check if we can write
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* it, so we are going to try to get the directory path, and
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* see if we can write a file in that */
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2008-10-20 22:18:40 +02:00
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char *dirPath = g_path_get_dirname(dbFile);
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2008-10-08 11:07:35 +02:00
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/* Check that the parent part of the path is a directory */
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if (stat(dirPath, &st) < 0) {
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2008-10-20 22:18:40 +02:00
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g_free(dirPath);
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2008-10-08 11:07:35 +02:00
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ERROR("Couldn't stat parent directory of db file "
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"\"%s\": %s\n", dbFile, strerror(errno));
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return -1;
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}
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if (!S_ISDIR(st.st_mode)) {
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2008-10-20 22:18:40 +02:00
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g_free(dirPath);
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2008-10-08 11:07:35 +02:00
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ERROR("Couldn't create db file \"%s\" because the "
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"parent path is not a directory\n", dbFile);
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return -1;
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}
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/* Check if we can write to the directory */
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if (access(dirPath, R_OK | W_OK)) {
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ERROR("Can't create db file in \"%s\": %s\n", dirPath,
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strerror(errno));
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2008-10-20 22:18:40 +02:00
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g_free(dirPath);
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2008-10-08 11:07:35 +02:00
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return -1;
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}
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2008-10-20 22:18:40 +02:00
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g_free(dirPath);
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2008-10-08 11:07:35 +02:00
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return 0;
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}
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/* Path exists, now check if it's a regular file */
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if (stat(dbFile, &st) < 0) {
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ERROR("Couldn't stat db file \"%s\": %s\n", dbFile,
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strerror(errno));
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return -1;
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}
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if (!S_ISREG(st.st_mode)) {
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ERROR("db file \"%s\" is not a regular file\n", dbFile);
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return -1;
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}
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/* And check that we can write to it */
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if (access(dbFile, R_OK | W_OK)) {
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ERROR("Can't open db file \"%s\" for reading/writing: %s\n",
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dbFile, strerror(errno));
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return -1;
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}
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return 0;
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}
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2008-10-08 11:07:55 +02:00
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int
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db_save(void)
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2008-10-08 11:07:35 +02:00
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{
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FILE *fp;
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2008-10-08 11:07:55 +02:00
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char *dbFile = db_get_file();
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2008-10-08 11:07:35 +02:00
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struct stat st;
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DEBUG("removing empty directories from DB\n");
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2008-10-08 11:07:58 +02:00
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directory_prune_empty(music_root);
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2008-10-08 11:07:35 +02:00
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DEBUG("sorting DB\n");
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2008-10-08 11:07:58 +02:00
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directory_sort(music_root);
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2008-10-08 11:07:35 +02:00
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DEBUG("writing DB\n");
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fp = fopen(dbFile, "w");
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if (!fp) {
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ERROR("unable to write to db file \"%s\": %s\n",
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dbFile, strerror(errno));
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return -1;
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}
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/* block signals when writing the db so we don't get a corrupted db */
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fprintf(fp, "%s\n", DIRECTORY_INFO_BEGIN);
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fprintf(fp, "%s%s\n", DIRECTORY_MPD_VERSION, VERSION);
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2008-11-05 18:21:52 +01:00
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fprintf(fp, "%s%s\n", DIRECTORY_FS_CHARSET, path_get_fs_charset());
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2008-10-08 11:07:35 +02:00
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fprintf(fp, "%s\n", DIRECTORY_INFO_END);
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2008-10-08 11:07:58 +02:00
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if (directory_save(fp, music_root) < 0) {
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2008-10-08 11:07:35 +02:00
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ERROR("Failed to write to database file: %s\n",
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strerror(errno));
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while (fclose(fp) && errno == EINTR);
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return -1;
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}
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while (fclose(fp) && errno == EINTR);
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if (stat(dbFile, &st) == 0)
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directory_dbModTime = st.st_mtime;
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return 0;
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}
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2008-10-08 11:07:55 +02:00
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int
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db_load(void)
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2008-10-08 11:07:35 +02:00
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{
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FILE *fp = NULL;
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2008-10-08 11:07:55 +02:00
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char *dbFile = db_get_file();
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2008-10-08 11:07:35 +02:00
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struct stat st;
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2008-10-09 15:21:18 +02:00
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char buffer[100];
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int foundFsCharset = 0;
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int foundVersion = 0;
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2008-10-08 11:07:35 +02:00
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if (!music_root)
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2008-10-08 11:08:16 +02:00
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music_root = directory_new("", NULL);
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2008-10-08 11:07:35 +02:00
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while (!(fp = fopen(dbFile, "r")) && errno == EINTR) ;
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if (fp == NULL) {
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ERROR("unable to open db file \"%s\": %s\n",
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dbFile, strerror(errno));
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return -1;
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}
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/* get initial info */
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2008-10-09 15:21:23 +02:00
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if (!myFgets(buffer, sizeof(buffer), fp))
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2008-10-09 15:21:18 +02:00
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FATAL("Error reading db, fgets\n");
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if (0 != strcmp(DIRECTORY_INFO_BEGIN, buffer)) {
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ERROR("db info not found in db file\n");
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ERROR("you should recreate the db using --create-db\n");
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while (fclose(fp) && errno == EINTR) ;
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return -1;
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}
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2008-10-09 15:21:23 +02:00
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while (myFgets(buffer, sizeof(buffer), fp) &&
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2008-10-09 15:21:18 +02:00
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0 != strcmp(DIRECTORY_INFO_END, buffer)) {
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2008-10-28 20:33:56 +01:00
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if (g_str_has_prefix(buffer, DIRECTORY_MPD_VERSION)) {
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2008-10-09 15:21:18 +02:00
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if (foundVersion)
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FATAL("already found version in db\n");
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foundVersion = 1;
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2008-10-28 20:33:56 +01:00
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} else if (g_str_has_prefix(buffer, DIRECTORY_FS_CHARSET)) {
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2008-10-09 15:21:18 +02:00
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char *fsCharset;
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char *tempCharset;
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if (foundFsCharset)
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FATAL("already found fs charset in db\n");
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foundFsCharset = 1;
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fsCharset = &(buffer[strlen(DIRECTORY_FS_CHARSET)]);
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if ((tempCharset = getConfigParamValue(CONF_FS_CHARSET))
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&& strcmp(fsCharset, tempCharset)) {
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WARNING("Using \"%s\" for the "
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"filesystem charset "
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"instead of \"%s\"\n",
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fsCharset, tempCharset);
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WARNING("maybe you need to "
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"recreate the db?\n");
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2008-11-05 18:21:52 +01:00
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path_set_fs_charset(fsCharset);
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2008-10-08 11:07:35 +02:00
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}
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2008-10-09 15:21:18 +02:00
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} else
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FATAL("directory: unknown line in db info: %s\n",
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buffer);
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2008-10-08 11:07:35 +02:00
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}
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DEBUG("reading DB\n");
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2008-10-08 11:07:58 +02:00
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directory_load(fp, music_root);
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2008-10-08 11:07:35 +02:00
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while (fclose(fp) && errno == EINTR) ;
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stats.numberOfSongs = countSongsIn(NULL);
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stats.dbPlayTime = sumSongTimesIn(NULL);
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if (stat(dbFile, &st) == 0)
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directory_dbModTime = st.st_mtime;
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return 0;
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}
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2008-10-08 11:07:55 +02:00
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time_t
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db_get_mtime(void)
|
2008-10-08 11:07:35 +02:00
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{
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return directory_dbModTime;
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}
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