Tests [ 0 -eq $UID ] don't work as in bash

[Andrey Voropaev <voropaev.andrey@xxxxxxxxx>]

Hello!

I'm sorry if this is FAQ question, but googling didn't report it, so
I'm asking here.

In our scripts we often use constructs like

##############
if [ 0 -eq $UID ]
then
        echo "This script must not be run by root user!"
        exit 1
fi
#################

This works fine in bash, but dash fails with warning " [: -ne:
argument expected". Is this intended feature? How to work around it in
dash then?

Best regards
Andrei Voropaev
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