Broker error on include_dir permissions on HUP

[chelliwell]

If the configured include_dir has incorrect permissions (e.g. drwx------, and owned by root; with mosquitto running under non-root user), then the broker starts up ok and uses the included conf(s), but if then sent a SIGHUP:

Jun 13 07:49:43 wgs daemon.info mosquitto[908]: Reloading config.
Jun 13 07:49:43 wgs daemon.err mosquitto[908]: Error: Unable to open include_dir '/etc/mosquitto/include.d'.

I guess this is because, at start up, the config is read before the dropping of user privileges, and permissions are not re-checked afterwards.

[toast-uz]

I'd like to reconfirm your situation.

• Run mosquitto by root user.
• Successfully read mosquitto.conf under the permission root user can only read.
• Mosquitto.conf describes mosquitto's non-root user.
• Mosquitto broker daemon run as the non-root user.
• Sent a SIGHUP
• Fail to read mosquitto.conf due to incorrect permission.

Right?
So what is the problem?

[ralight]

The point is that the config is read originally as the root user, so it succeeds. Sending the HUP and it failing is then unexpected.

[toast-uz]

@ralight if mosquitto daemon run as the root, the config should be reloaded. But, if mosquitto daemon run as the non-root user, I guess the config should not be reloaded. This issue's situation is the latter. So I guess it's normal to fail to reload. I've misunderstood?

[momoskitto]

This issue looks like a duplicate of
#588

[ralight]

It shouldn't be possible this occurs as of 2.0.