Check that db_file exists before checking if we can write to it. Committed on behalf of qball.

git-svn-id: https://svn.musicpd.org/mpd/trunk@4255 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/directory.c

@@ -48,6 +48,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <assert.h>
+#include <libgen.h>
 
 #define DIRECTORY_DIR		"directory: "
 #define DIRECTORY_MTIME		"mtime: "
@@ -989,7 +990,36 @@ void sortDirectory(Directory * directory) {
 
 int checkDirectoryDB() {
 	char * dbFile = getDbFile();
+	/**
+	 * Check if the file exists 
+	 */
+	if(access(dbFile, F_OK)) {
+		char *dirPath = NULL;
+		char *dbPath = strdup(dbFile);
 
+		/** 
+		 * If the file doesn't exits, 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
+		 */
+		dirPath = dirname(dbPath);
+	
+		/** 
+		 * Check if we can write to the directory 
+		 */
+		if(access(dirPath, R_OK|W_OK))
+		{
+			ERROR("Can't create db file in \"%s\": %s", dirPath, strerror(errno));
+			free(dbPath);
+			return -1;
+
+		}
+		free(dbPath);
+		return 0;
+
+	}
+	/**
+	 * File exists, now check if we can write it
+	 */
 	if(access(dbFile, R_OK|W_OK)) {
 		ERROR("db file \"%s\" cannot be opened for reading/writing: %s",
 				dbFile, strerror(errno));