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Check the logged user instead of $USER (#3330) 

* Check the logged user instead of $USER

Given that `sudo usermod --login "$DOCKER_USER" coder` and `sudo groupmod -n "$DOCKER_USER" coder` modify the container's disk it'll persist across restarts, but environment variables will be reset to whatever state they had at the end of `Dockerfile`. In this case, `$USER` is set to `coder`, so this branch will always be true.

By checking with the output of `whoami`, which gets it's information from `/etc/passwd`, we make sure to get the real logged user and not the one defined by $USER.

We also move `USER="$DOCKER_USER"` out of the branch, since we always want this to happen at entry-point. If we don't do this assignment, $USER will contain `coder` upon restart.

* Update entrypoint.sh

Check `$DOCKER_USER` was defined before copying it to `$USER`.
This commit is contained in:
videlanicolas 2021-05-12 01:26:38 +10:00 committed by GitHub
parent 014d7468f0
commit 3df771fbc4
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1 changed files with 9 additions and 8 deletions
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17
ci/release-image/entrypoint.sh
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@ -5,16 +5,17 @@ set -eu
# Otherwise the current container UID may not exist in the passwd database.
eval "$(fixuid -q)"
if [ "${DOCKER_USER-}" ] && [ "$DOCKER_USER" != "$USER" ]; then
echo "$DOCKER_USER ALL=(ALL) NOPASSWD:ALL" | sudo tee -a /etc/sudoers.d/nopasswd >/dev/null
# Unfortunately we cannot change $HOME as we cannot move any bind mounts
# nor can we bind mount $HOME into a new home as that requires a privileged container.
sudo usermod --login "$DOCKER_USER" coder
sudo groupmod -n "$DOCKER_USER" coder
if [ "${DOCKER_USER-}" ]; then
USER="$DOCKER_USER"
if [ "$DOCKER_USER" != "$(whoami)" ]; then
echo "$DOCKER_USER ALL=(ALL) NOPASSWD:ALL" | sudo tee -a /etc/sudoers.d/nopasswd >/dev/null
# Unfortunately we cannot change $HOME as we cannot move any bind mounts
# nor can we bind mount $HOME into a new home as that requires a privileged container.
sudo usermod --login "$DOCKER_USER" coder
sudo groupmod -n "$DOCKER_USER" coder
sudo sed -i "/coder/d" /etc/sudoers.d/nopasswd
sudo sed -i "/coder/d" /etc/sudoers.d/nopasswd
fi
fi
dumb-init /usr/bin/code-server "$@"