It doesn't work with debian 9 (stretch)

[fabioperrella]

In debian 9 image, the su command does not send the exported functions to the context of the command running in su, so the suexec command does not work. (if $BRICKS_LINUX == "true").

To simulate in debian 8 (jessie):

$ docker run -it debian:jessie bash

# paste the code below

info() {
    message=$1;
    echo -e "\n\033[32m${message}\033[0m\n";
}
export -f info

useradd -u 1000 -m -d /home/builder builder
su builder -m -c "bash -ec 'type info'"
# info is a function
# info () 
#{ 
#   message=$1;
#    echo -e "\n\033[32m${message}\033[0m\n"
#}

To simulate in debian 9 (strech):

$ docker run -it debian:strech bash

# paste the code below

info() {
    message=$1;
    echo -e "\n\033[32m${message}\033[0m\n";
}
export -f info

useradd -u 1000 -m -d /home/builder builder
su builder -m -c "bash -ec 'type info'"
# bash: line 0: type: info: not found

As an alternative, it is possible to use $BRICKS_LINUX == "false", so all the commands will run with the root user.

[fabioperrella]

Maybe using the gosu command suggested in the docker docs could fix the problem.