Unable to detect running processes on Alpine-based system

[gregurco]

The problem is that in alpine ps command ignores PID argument. So, when you run ps 1 you always will receive ALL processes. I added -o pid to command to remove useless data and to leave only PIDs and added one more condition to detect if process is running, so finally the process is running if:

• the result of exec has more then 1 line
• PID exists in result of ps command

Similar problem: inspec/inspec#2034

[gregurco]

ping @Phobetor

[Phobetor]

@gregurco Thanks for this particular fix. And thanks for the optimization in general. It is much more reliable, now. Even if the output format should change for some reason.

[Phobetor]

Hi @gregurco

Thank you very much again for this pull request!

It is merged to dev-master and released in version 3.0.0.

I had to fix the call to ps to make it run on ubuntu/debian. I changed it from

ps %d -o pid

to

ps -o pid %d

Can you please verify if this is also working on alpine?

Thanks in advance!

[gregurco]

@Phobetor yep, it's working 🙂 👍

[Phobetor]

@gregurco great, thanks!