Jat/Q patch for checking permission on database before creating it

git-svn-id: https://svn.musicpd.org/mpd/trunk@4140 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/directory.c

@@ -988,6 +988,18 @@ void sortDirectory(Directory * directory) {
 	}
 }
 
+int checkDirectoryDB() {
+	char * dbFile = getDbFile();
+
+	if(access(dbFile, R_OK|W_OK)) {
+		ERROR("db file \"%s\" cannot be opened for reading/writing: %s",
+				dbFile, strerror(errno));
+		return -1;
+	}
+	
+	return 0;
+}
+
 int writeDirectoryDB() {
 	FILE * fp;
 	char * dbFile = getDbFile();

src/directory.h

@@ -58,6 +58,8 @@ void closeMp3Directory();
 
 int printDirectoryInfo(FILE * fp, char * dirname);
 
+int checkDirectoryDB();
+
 int writeDirectoryDB();
 
 int readDirectoryDB();

src/main.c

@@ -320,6 +320,7 @@ void openDB(Options * options, char * argv0) {
                         exit(EXIT_FAILURE);
                 }
                 flushWarningLog();
+                if(checkDirectoryDB()<0) exit(EXIT_FAILURE);
                 initMp3Directory();
                 if(writeDirectoryDB()<0) exit(EXIT_FAILURE);
 		if(options->createDB) exit(EXIT_SUCCESS);