How to change mode for cluster log?

[Binghan <binghanluc@xxxxxxxxx>]

Hi,

I have the following configuration in postgresql.conf. However, it only ensure the mode 600 for file under pg_log. The cluster log file postgresql-10-main.log has 640. How can control the mode for cluster log in postgres. 

logging_collector = off log_directory = '/var/log/postgresql/pg_log' log_filename = 'postgres-event.log' log_file_mode = 0600

BRs,

BH