mapper: moved musicDir initialization from path.c

Moved the musicDir variable and its initialization code from path.c to
mapper.c.

src/main.c

@@ -26,6 +26,7 @@
 #include "listen.h"
 #include "conf.h"
 #include "path.h"
+#include "mapper.h"
 #include "playerData.h"
 #include "outputBuffer.h"
 #include "decoder_thread.h"
@@ -410,6 +411,7 @@ int main(int argc, char *argv[])
 	open_log_files(options.stdOutput);
 
 	initPaths();
+	mapper_init();
 	initPermissions();
 	initPlaylist();
 	decoder_plugin_init_all();
@@ -477,6 +479,7 @@ int main(int argc, char *argv[])
 	finishAudioDriver();
 	finishAudioConfig();
 	finishVolume();
+	mapper_finish();
 	finishPaths();
 	finishPermissions();
 	dc_deinit();

src/mapper.c

@@ -24,13 +24,54 @@
 #include "directory.h"
 #include "song.h"
 #include "path.h"
+#include "conf.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <glib.h>
+
+static char *music_dir;
+static size_t music_dir_length;
+
+void mapper_init(void)
+{
+	ConfigParam *music_dir_param = parseConfigFilePath(CONF_MUSIC_DIR, 1);
+	int ret;
+	struct stat st;
+
+	music_dir = g_strdup(music_dir_param->value);
+	music_dir_length = strlen(music_dir);
+
+	ret = stat(music_dir, &st);
+	if (ret < 0)
+		g_error("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_error("music directory is not a directory: \"%s\" (config line %i)\n",
+			music_dir_param->value, music_dir_param->line);
+}
+
+void mapper_finish(void)
+{
+	g_free(music_dir);
+}
+
+static char *
+rmp2amp_r(char *dst, const char *rel_path)
+{
+	pfx_dir(dst, rel_path, strlen(rel_path),
+		(const char *)music_dir, music_dir_length);
+	return dst;
+}
 
 const char *
 map_directory_fs(const struct directory *directory, char *buffer)
 {
 	const char *dirname = directory_get_path(directory);
 	if (isRootDirectory(dirname))
-	    return musicDir;
+	    return music_dir;
 
 	return rmp2amp_r(buffer, utf8_to_fs_charset(buffer, dirname));
 }
@@ -63,12 +104,10 @@ map_song_fs(const struct song *song, char *buffer)
 const char *
 map_fs_to_utf8(const char *path_fs, char *buffer)
 {
-	size_t music_path_length = strlen(musicDir);
-
-	if (strncmp(path_fs, musicDir, music_path_length) == 0 &&
-	    path_fs[music_path_length] == '/')
+	if (strncmp(path_fs, music_dir, music_dir_length) == 0 &&
+	    path_fs[music_dir_length] == '/')
 		/* remove musicDir prefix */
-		path_fs += music_path_length;
+		path_fs += music_dir_length;
 	else if (path_fs[0] == '/')
 		/* not within musicDir */
 		return NULL;

src/mapper.h

@@ -26,6 +26,10 @@
 struct directory;
 struct song;
 
+void mapper_init(void);
+
+void mapper_finish(void);
+
 /**
  * Determines the file system path of a directory object.
  *

src/path.c

@@ -33,9 +33,7 @@
 
 #include <glib.h>
 
-const char *musicDir;
 static const char *playlistDir;
-static size_t music_dir_len;
 static size_t playlist_dir_len;
 static char *fsCharset;
 
@@ -100,7 +98,6 @@ const char *getFsCharset(void)
 
 void initPaths(void)
 {
-	ConfigParam *musicParam = parseConfigFilePath(CONF_MUSIC_DIR, 1);
 	ConfigParam *playlistParam = parseConfigFilePath(CONF_PLAYLIST_DIR, 1);
 	ConfigParam *fsCharsetParam = getConfigParam(CONF_FS_CHARSET);
 
@@ -108,10 +105,7 @@ void initPaths(void)
 	char *originalLocale;
 	DIR *dir;
 
-	musicDir = xstrdup(musicParam->value);
 	playlistDir = xstrdup(playlistParam->value);
-
-	music_dir_len = strlen(musicDir);
 	playlist_dir_len = strlen(playlistDir);
 
 	if ((dir = opendir(playlistDir)) == NULL) {
@@ -121,13 +115,6 @@ void initPaths(void)
 	} else
 		closedir(dir);
 
-	if ((dir = opendir(musicDir)) == NULL) {
-		ERROR("cannot open %s \"%s\" (config line %i): %s\n",
-		      CONF_MUSIC_DIR, musicParam->value,
-		      musicParam->line, strerror(errno));
-	} else
-		closedir(dir);
-
 	if (fsCharsetParam) {
 		charset = xstrdup(fsCharsetParam->value);
 	}
@@ -195,13 +182,6 @@ char *pfx_dir(char *dst,
 	return (dst + pfx_len + 1);
 }
 
-char *rmp2amp_r(char *dst, const char *rel_path)
-{
-	pfx_dir(dst, rel_path, strlen(rel_path),
-	        (const char *)musicDir, music_dir_len);
-	return dst;
-}
-
 char *rpp2app_r(char *dst, const char *rel_path)
 {
 	pfx_dir(dst, rel_path, strlen(rel_path),

src/path.h

@@ -31,8 +31,6 @@
 #  endif
 #endif
 
-extern const char *musicDir;
-
 void initPaths(void);
 
 void finishPaths(void);
@@ -57,9 +55,6 @@ char *pfx_dir(char *dst,
               const char *path, const size_t path_len,
               const char *pfx, const size_t pfx_len);
 
-/* relative music path to absolute music path */
-char *rmp2amp_r(char *dst, const char *rel_path);
-
 /* relative playlist path to absolute playlist path */
 char *rpp2app_r(char *dst, const char *rel_path);