How to tell start-stop-daemon to update $HOME and $USER accordingly to --chuid parameter

Posted by iElectric on Server Fault See other posts from Server Fault or by iElectric
Published on 2010-05-09T08:15:50Z Indexed on 2010/05/09 8:18 UTC
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I'm trying to run a service that uses $HOME and $USER environment variables. I could set them in service itself, but that would only be a temporary solution.

Let's say I have a script test.sh with following content:

echo $USER

And I run it with start-stop-daemon to see my results:

$ start-stop-daemon --start --exec `pwd`/test.sh --user guest --group guest --chuid -guest
root

Seems like it does not update environment, maybe that should be reported as a bug?

I have found a nasty hacky solution, which only works (for unknown reason) on my this simple use case:

$ start-stop-daemon --exec /usr/bin/sudo --start -- -u guest -i 'echo $USER'
guest

I'm sure someone else stumbled upon this, I'm interested in clean solution.

$ start-stop-daemon --version
start-stop-daemon 1.13.11+gentoo

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