Fossil

      blob_zero(&path);
      blob_appendf(&path, "%s/%s", g.zLocalRoot, zDir);
      zPath = blob_str(&path);
      /* Handle various cases of existence of the directory */
      switch( file_wd_isdir(zPath) ){
        case 0: { /* doesn't exist */
          if( file_mkdir(zPath, 0)!=0 ) {
          if( file_mkfolder(zPath, 0, 1) ) {
            fossil_warning("couldn't create directory %s as "
                           "required by empty-dirs setting", zDir);
          }
          break;
        }
        case 1: { /* exists, and is a directory */
          /* do nothing - required directory exists already */