/* 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 "database.h"
#include "directory.h"
#include "song.h"
#include "conf.h"
#include "log.h"
#include "ls.h"
#include "path.h"
#include "stats.h"
#include "utils.h"
#include "dbUtils.h"
#include "update.h"
#include <assert.h>
#include <string.h>
static struct directory *music_root;
static time_t directory_dbModTime;
void directory_init(void)
{
music_root = newDirectory(NULL, NULL);
updateDirectory(music_root);
stats.numberOfSongs = countSongsIn(NULL);
stats.dbPlayTime = sumSongTimesIn(NULL);
}
void directory_finish(void)
{
freeDirectory(music_root);
}
struct directory *
directory_get_root(void)
{
assert(music_root != NULL);
return music_root;
}
struct directory *
getDirectory(const char *name)
{
if (name == NULL)
return music_root;
return getSubDirectory(music_root, name);
}
struct song *
getSongFromDB(const char *file)
{
struct song *song = NULL;
struct directory *directory;
char *dir = NULL;
char *duplicated = xstrdup(file);
char *shortname = strrchr(duplicated, '/');
DEBUG("get song: %s\n", file);
if (!shortname) {
shortname = duplicated;
} else {
*shortname = '\0';
++shortname;
dir = duplicated;
}
if (!(directory = getDirectory(dir)))
goto out;
if (!(song = songvec_find(&directory->songs, shortname)))
goto out;
assert(song->parent == directory);
out:
free(duplicated);
return song;
}
int
traverseAllIn(const char *name,
int (*forEachSong) (struct song *, void *),
int (*forEachDir) (struct directory *, void *), void *data)
{
struct directory *directory;
if ((directory = getDirectory(name)) == NULL) {
struct song *song;
if ((song = getSongFromDB(name)) && forEachSong) {
return forEachSong(song, data);
}
return -1;
}
return traverseAllInSubDirectory(directory, forEachSong, forEachDir,
data);
}
static char *getDbFile(void)
{
ConfigParam *param = parseConfigFilePath(CONF_DB_FILE, 1);
assert(param);
assert(param->value);
return param->value;
}
int checkDirectoryDB(void)
{
struct stat st;
char *dbFile = getDbFile();
/* Check if the file exists */
if (access(dbFile, F_OK)) {
/* If the file doesn't exist, we can't check if we can write
* it, so we are going to try to get the directory path, and
* see if we can write a file in that */
char dirPath[MPD_PATH_MAX];
parent_path(dirPath, dbFile);
if (*dirPath == '\0')
strcpy(dirPath, "/");
/* Check that the parent part of the path is a directory */
if (stat(dirPath, &st) < 0) {
ERROR("Couldn't stat parent directory of db file "
"\"%s\": %s\n", dbFile, strerror(errno));
return -1;
}
if (!S_ISDIR(st.st_mode)) {
ERROR("Couldn't create db file \"%s\" because the "
"parent path is not a directory\n", dbFile);
return -1;
}
/* Check if we can write to the directory */
if (access(dirPath, R_OK | W_OK)) {
ERROR("Can't create db file in \"%s\": %s\n", dirPath,
strerror(errno));
return -1;
}
return 0;
}
/* Path exists, now check if it's a regular file */
if (stat(dbFile, &st) < 0) {
ERROR("Couldn't stat db file \"%s\": %s\n", dbFile,
strerror(errno));
return -1;
}
if (!S_ISREG(st.st_mode)) {
ERROR("db file \"%s\" is not a regular file\n", dbFile);
return -1;
}
/* And check that we can write to it */
if (access(dbFile, R_OK | W_OK)) {
ERROR("Can't open db file \"%s\" for reading/writing: %s\n",
dbFile, strerror(errno));
return -1;
}
return 0;
}
int writeDirectoryDB(void)
{
FILE *fp;
char *dbFile = getDbFile();
struct stat st;
DEBUG("removing empty directories from DB\n");
deleteEmptyDirectoriesInDirectory(music_root);
DEBUG("sorting DB\n");
sortDirectory(music_root);
DEBUG("writing DB\n");
fp = fopen(dbFile, "w");
if (!fp) {
ERROR("unable to write to db file \"%s\": %s\n",
dbFile, strerror(errno));
return -1;
}
/* block signals when writing the db so we don't get a corrupted db */
fprintf(fp, "%s\n", DIRECTORY_INFO_BEGIN);
fprintf(fp, "%s%s\n", DIRECTORY_MPD_VERSION, VERSION);
fprintf(fp, "%s%s\n", DIRECTORY_FS_CHARSET, getFsCharset());
fprintf(fp, "%s\n", DIRECTORY_INFO_END);
if (writeDirectoryInfo(fp, music_root) < 0) {
ERROR("Failed to write to database file: %s\n",
strerror(errno));
while (fclose(fp) && errno == EINTR);
return -1;
}
while (fclose(fp) && errno == EINTR);
if (stat(dbFile, &st) == 0)
directory_dbModTime = st.st_mtime;
return 0;
}
int readDirectoryDB(void)
{
FILE *fp = NULL;
char *dbFile = getDbFile();
struct stat st;
if (!music_root)
music_root = newDirectory(NULL, NULL);
while (!(fp = fopen(dbFile, "r")) && errno == EINTR) ;
if (fp == NULL) {
ERROR("unable to open db file \"%s\": %s\n",
dbFile, strerror(errno));
return -1;
}
/* get initial info */
{
char buffer[100];
int bufferSize = 100;
int foundFsCharset = 0;
int foundVersion = 0;
if (!myFgets(buffer, bufferSize, fp))
FATAL("Error reading db, fgets\n");
if (0 == strcmp(DIRECTORY_INFO_BEGIN, buffer)) {
while (myFgets(buffer, bufferSize, fp) &&
0 != strcmp(DIRECTORY_INFO_END, buffer)) {
if (!prefixcmp(buffer, DIRECTORY_MPD_VERSION))
{
if (foundVersion)
FATAL("already found version in db\n");
foundVersion = 1;
} else if (!prefixcmp(buffer,
DIRECTORY_FS_CHARSET)) {
char *fsCharset;
char *tempCharset;
if (foundFsCharset)
FATAL("already found fs charset in db\n");
foundFsCharset = 1;
fsCharset = &(buffer[strlen(DIRECTORY_FS_CHARSET)]);
if ((tempCharset = getConfigParamValue(CONF_FS_CHARSET))
&& strcmp(fsCharset, tempCharset)) {
WARNING("Using \"%s\" for the "
"filesystem charset "
"instead of \"%s\"\n",
fsCharset, tempCharset);
WARNING("maybe you need to "
"recreate the db?\n");
setFsCharset(fsCharset);
}
} else {
FATAL("directory: unknown line in db info: %s\n",
buffer);
}
}
} else {
ERROR("db info not found in db file\n");
ERROR("you should recreate the db using --create-db\n");
while (fclose(fp) && errno == EINTR) ;
return -1;
}
}
DEBUG("reading DB\n");
readDirectoryInfo(fp, music_root);
while (fclose(fp) && errno == EINTR) ;
stats.numberOfSongs = countSongsIn(NULL);
stats.dbPlayTime = sumSongTimesIn(NULL);
if (stat(dbFile, &st) == 0)
directory_dbModTime = st.st_mtime;
return 0;
}
time_t getDbModTime(void)
{
return directory_dbModTime;
}
