From 1f0dfb4407344996bbe874525413275b79da12b3 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Sun, 18 Jan 2009 16:56:07 +0100
Subject: [PATCH] mapper: make the music_directory optional
Without a music_directory, MPD is an excellent streaming client.
---
NEWS | 2 +-
doc/mpd.conf.5 | 7 +++---
src/database.c | 28 +++++++++++++++++----
src/database.h | 4 +++
src/main.c | 11 ++++++++-
src/mapper.c | 67 +++++++++++++++++++++++++++++++-------------------
src/mapper.h | 8 ++++++
src/update.c | 3 +++
8 files changed, 95 insertions(+), 35 deletions(-)
diff --git a/NEWS b/NEWS
index e4fa1e995..423c6ed3c 100644
--- a/NEWS
+++ b/NEWS
@@ -12,7 +12,7 @@ ver 0.15 - (200?/??/??)
* failure to read the state file is non-fatal
* added Icy-Metadata support
* --create-db starts the MPD daemon instead of exiting
-* playlist_directory is optional
+* playlist_directory and music_directory are optional
ver 0.14.1 (2009/01/17)
diff --git a/doc/mpd.conf.5 b/doc/mpd.conf.5
index 9ee10b2b7..a40ec9467 100644
--- a/doc/mpd.conf.5
+++ b/doc/mpd.conf.5
@@ -29,9 +29,6 @@ See \fBdocs/mpdconf.example\fP in the source tarball for an example
configuration file.
.SH REQUIRED PARAMETERS
.TP
-.B music_directory <directory>
-This specifies the directory where music is located.
-.TP
.B follow_outside_symlinks <yes or no>
Control if MPD will follow symbolic links pointing outside the music dir.
You must recreate the database after changing this option.
@@ -54,6 +51,10 @@ The special value "syslog" makes MPD use the local syslog daemon.
.B pid_file <file>
This specifies the file to save mpd's process ID in.
.TP
+.B music_directory <directory>
+This specifies the directory where music is located.
+If you do not configure this, you can only play streams.
+.TP
.B playlist_directory <directory>
This specifies the directory where saved playlists are stored.
If you do not configure this, you cannot save playlists.
diff --git a/src/database.c b/src/database.c
index 44909aced..6beb84f61 100644
--- a/src/database.c
+++ b/src/database.c
@@ -49,13 +49,17 @@ db_init(const char *path)
{
database_path = g_strdup(path);
- music_root = directory_new("", NULL);
+ if (path != NULL)
+ music_root = directory_new("", NULL);
}
void
db_finish(void)
{
- directory_free(music_root);
+ assert((database_path == NULL) == (music_root == NULL));
+
+ if (music_root != NULL)
+ directory_free(music_root);
g_free(database_path);
}
@@ -63,6 +67,8 @@ db_finish(void)
void
db_clear(void)
{
+ assert(music_root != NULL);
+
directory_free(music_root);
music_root = directory_new("", NULL);
}
@@ -78,6 +84,9 @@ db_get_root(void)
struct directory *
db_get_directory(const char *name)
{
+ if (music_root == NULL)
+ return NULL;
+
if (name == NULL)
return music_root;
@@ -89,14 +98,20 @@ db_get_song(const char *file)
{
struct song *song = NULL;
struct directory *directory;
- char *dir = NULL;
- char *duplicated = g_strdup(file);
- char *shortname = strrchr(duplicated, '/');
+ char *duplicated, *shortname, *dir;
+
+ assert(file != NULL);
g_debug("get song: %s", file);
+ if (music_root == NULL)
+ return NULL;
+
+ duplicated = g_strdup(file);
+ shortname = strrchr(duplicated, '/');
if (!shortname) {
shortname = duplicated;
+ dir = NULL;
} else {
*shortname = '\0';
++shortname;
@@ -121,6 +136,9 @@ db_walk(const char *name,
{
struct directory *directory;
+ if (music_root == NULL)
+ return -1;
+
if ((directory = db_get_directory(name)) == NULL) {
struct song *song;
if ((song = db_get_song(name)) && forEachSong) {
diff --git a/src/database.h b/src/database.h
index bb2ccce70..211cdc619 100644
--- a/src/database.h
+++ b/src/database.h
@@ -42,6 +42,10 @@ db_finish(void);
void
db_clear(void);
+/**
+ * Returns the root directory object. Returns NULL if there is no
+ * configured music directory.
+ */
struct directory *
db_get_root(void);
diff --git a/src/main.c b/src/main.c
index b7e9e0106..1bcae8f36 100644
--- a/src/main.c
+++ b/src/main.c
@@ -128,7 +128,16 @@ static void openDB(Options * options, char *argv0)
{
struct config_param *param;
- param = parseConfigFilePath(CONF_DB_FILE, true);
+ param = parseConfigFilePath(CONF_DB_FILE,
+ mapper_has_music_directory());
+ if (!mapper_has_music_directory()) {
+ if (param != NULL)
+ g_message("Found " CONF_DB_FILE " setting without "
+ CONF_MUSIC_DIR " - disabling database");
+ db_init(NULL);
+ return;
+ }
+
db_init(param->value);
if (options->createDB > 0 || !db_load()) {
diff --git a/src/mapper.c b/src/mapper.c
index 2c3e50ab0..a47507bb1 100644
--- a/src/mapper.c
+++ b/src/mapper.c
@@ -40,6 +40,24 @@ static size_t music_dir_length;
static char *playlist_dir;
+static void
+mapper_set_music_dir(const char *path, int line)
+{
+ int ret;
+ struct stat st;
+
+ music_dir = g_strdup(path);
+ music_dir_length = strlen(music_dir);
+
+ ret = stat(music_dir, &st);
+ if (ret < 0)
+ g_warning("failed to stat music directory \"%s\" (config line %i): %s\n",
+ music_dir, line, g_strerror(errno));
+ else if (!S_ISDIR(st.st_mode))
+ g_warning("music directory is not a directory: \"%s\" (config line %i)\n",
+ music_dir, line);
+}
+
static void
mapper_set_playlist_dir(const char *path, int line)
{
@@ -59,34 +77,19 @@ mapper_set_playlist_dir(const char *path, int line)
void mapper_init(void)
{
- struct config_param *music_dir_param =
- parseConfigFilePath(CONF_MUSIC_DIR, false);
struct config_param *param;
- int ret;
- struct stat st;
- if (music_dir_param != NULL) {
- music_dir = g_strdup(music_dir_param->value);
- } else {
+ param = parseConfigFilePath(CONF_MUSIC_DIR, false);
+ if (param != NULL)
+ mapper_set_music_dir(param->value, param->line);
#if GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 14)
- music_dir = g_strdup(g_get_user_special_dir(G_USER_DIRECTORY_MUSIC));
- if (music_dir == NULL)
- /* GLib failed to determine the XDG music
- directory - abort */
-#endif
- g_error("config parameter \"%s\" not found\n", CONF_MUSIC_DIR);
+ else {
+ const char *path =
+ g_get_user_special_dir(G_USER_DIRECTORY_MUSIC);
+ if (path != NULL)
+ mapper_set_music_dir(path, -1);
}
-
- music_dir_length = strlen(music_dir);
-
- ret = stat(music_dir, &st);
- if (ret < 0)
- g_warning("failed to stat music directory \"%s\" (config line %i): %s\n",
- music_dir_param->value, music_dir_param->line,
- strerror(errno));
- else if (!S_ISDIR(st.st_mode))
- g_warning("music directory is not a directory: \"%s\" (config line %i)\n",
- music_dir_param->value, music_dir_param->line);
+#endif
param = parseConfigFilePath(CONF_PLAYLIST_DIR, false);
if (param != NULL)
@@ -99,6 +102,12 @@ void mapper_finish(void)
g_free(playlist_dir);
}
+bool
+mapper_has_music_directory(void)
+{
+ return music_dir != NULL;
+}
+
char *
map_uri_fs(const char *uri)
{
@@ -107,6 +116,9 @@ map_uri_fs(const char *uri)
assert(uri != NULL);
assert(*uri != '/');
+ if (music_dir == NULL)
+ return NULL;
+
uri_fs = utf8_to_fs_charset(uri);
if (uri_fs == NULL)
return NULL;
@@ -120,6 +132,8 @@ map_uri_fs(const char *uri)
char *
map_directory_fs(const struct directory *directory)
{
+ assert(music_dir != NULL);
+
if (directory_is_root(directory))
return g_strdup(music_dir);
@@ -131,6 +145,8 @@ map_directory_child_fs(const struct directory *directory, const char *name)
{
char *name_fs, *parent_fs, *path;
+ assert(music_dir != NULL);
+
/* check for invalid or unauthorized base names */
if (*name == 0 || strchr(name, '/') != NULL ||
strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
@@ -167,7 +183,8 @@ map_song_fs(const struct song *song)
char *
map_fs_to_utf8(const char *path_fs)
{
- if (strncmp(path_fs, music_dir, music_dir_length) == 0 &&
+ if (music_dir != NULL &&
+ strncmp(path_fs, music_dir, music_dir_length) == 0 &&
path_fs[music_dir_length] == '/')
/* remove musicDir prefix */
path_fs += music_dir_length + 1;
diff --git a/src/mapper.h b/src/mapper.h
index d33a21bbf..874add377 100644
--- a/src/mapper.h
+++ b/src/mapper.h
@@ -23,6 +23,8 @@
#ifndef MPD_MAPPER_H
#define MPD_MAPPER_H
+#include <stdbool.h>
+
#define PLAYLIST_FILE_SUFFIX "m3u"
struct directory;
@@ -32,6 +34,12 @@ void mapper_init(void);
void mapper_finish(void);
+/**
+ * Returns true if a music directory was configured.
+ */
+bool
+mapper_has_music_directory(void);
+
/**
* Determines the absolute file system path of a relative URI. This
* is basically done by converting the URI to the file system charset
diff --git a/src/update.c b/src/update.c
index f27247628..1edb8cc01 100644
--- a/src/update.c
+++ b/src/update.c
@@ -680,6 +680,9 @@ directory_update_init(char *path)
{
assert(g_thread_self() == main_task);
+ if (!mapper_has_music_directory())
+ return 0;
+
if (progress != UPDATE_PROGRESS_IDLE) {
unsigned next_task_id;