[mosquitto_passwd] Confusing error if user forgets to include username

[jabelone]

If you run the following command (without specifying a username) mosquitto_passwd -c /etc/mosquitto/passwd you get a very confusing error message even if the file exists Error: Unable to open password file -c. No such file or directory.. This had me confused for a little while until I realised I forgot the username. If I include the username like mosquitto_passwd -c /etc/mosquitto/passwd jaimyn without changing anything else, it works fine.

I understand it's not critical and completely the users fault for not using the right syntax. However the misleading error message may lead to someone getting very confused.

This is on Ubuntu 16.04 with mosquitto 1.4.8. (installed via apt-get)

[ralight]

Thanks very much, you're quite right. I've pushed a change that should improve things.