Syslog and daily files in C

Question

I configured /etc/syslog.conf:

local0.debug /custom/path/log/app.log

so that syslog logs to a custom log file.

openlog("app", LOG_PID, LOG_LOCAL0);

Now I would also like syslog to create a different file each day, eg:

/custom/path/log/20210204_app.log

/custom/path/log/20210205_app.log

How can I do this?

Answer 1

Use logrotate and configure /etc/logrotate.d/apt with your file and policies. Something like this would do the job.

/custom/path/log/app.log {
  rotate 12
  daily
  missingok
  notifempty
}