SQL shrink logfiles

DECLARE @dbname VARCHAR(50)

DECLARE @fname VARCHAR(50)

DECLARE @dbid tinyint

DECLARE @lsize numeric(10,5)

DECLARE @TSQLExec VARCHAR (MAX) = '';

declare  db_cur cursor for

SELECT 

    db.name DBName, fs.name FName, db.database_id,

    fs.SIZE * 8.0 / 1024 LogFileSizeMB

FROM sys.databases db

left join sys.master_files fs on fs.database_id = db.database_id

WHERE db.database_id > 4 and db.state=0 and fs.type=1 and db.is_read_only=0

open db_cur

FETCH NEXT FROM db_cur  INTO @dbname , @fname, @dbid ,@lsize

WHILE @@FETCH_STATUS = 0  

BEGIN  

      set @TSQLExec = concat('use [', @dbname,'];CHECKPOINT;','dbcc shrinkfile(N''',@fname,''',64) with no_infomsgs;'); --, Char (13),Char (10)

  set @TSQLExec = concat(@TSQLExec,'ALTER DATABASE [',@dbname,'] MODIFY FILE ( NAME = N''',@fname,''', FILEGROWTH = 64MB, MAXSIZE = UNLIMITED );');

  --set @TSQLExec = concat(@TSQLExec,'ALTER DATABASE [',@dbname,'] MODIFY FILE ( NAME = N''',@fname,''', SIZE = 16MB);');

  

  print @TSQLExec;

  --EXEC (@TSQLExec);

      FETCH NEXT FROM db_cur  INTO @dbname , @fname, @dbid ,@lsize

END 

close db_cur

deallocate db_cur