oidc-demo-app/debian/postinst

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#!/bin/dash
set -e
case "$1" in
configure)
[ -f "/etc/default/cacert-oidc-demo-app" ] && . /etc/default/cacert-oidc-demo-app
[ -z "$OIDC_DEMO_APP_HOME" ] && OIDC_DEMO_APP_HOME=/var/lib/oidc-demo-app
[ -z "$OIDC_DEMO_APP_USER" ] && OIDC_DEMO_APP_USER=cacert-demo
[ -z "$OIDC_DEMO_APP_NAME" ] && OIDC_DEMO_APP_NAME="CAcert OIDC Demo"
[ -z "$OIDC_DEMO_APP_GROUP" ] && OIDC_DEMO_APP_GROUP=cacert-demo
# create user to avoid running cacert-oidc-demo-app as root
# 1. create group if not existing
if ! getent group | grep -q "^$OIDC_DEMO_APP_GROUP" ; then
echo -n "Adding group $OIDC_DEMO_APP_GROUP.."
addgroup --quiet --system $OIDC_DEMO_APP_GROUP 2>/dev/null || true
echo "..done"
fi
# 2. create homedir if not existing
test -d "$OIDC_DEMO_APP_HOME" || mkdir "$OIDC_DEMO_APP_HOME"
# 3. create user if not existing
if ! getent passwd | grep -q "^$OIDC_DEMO_APP_USER"; then
echo -n "Adding system user $OIDC_DEMO_APP_USER.."
adduser --quiet \
--system \
--ingroup $OIDC_DEMO_APP_GROUP \
--no-create-home \
--disabled-password \
$OIDC_DEMO_APP_USER 2>/dev/null || true
echo "..done"
fi
# 4. adjust passwd entry
usermod -c "$OIDC_DEMO_APP_NAME" \
-d $OIDC_DEMO_APP_HOME \
-g $OIDC_DEMO_APP_GROUP \
$OIDC_DEMO_APP_USER || true
# 5. adjust file and directory permissions
if ! dpkg-statoverride --list $OIDC_DEMO_APP_HOME >/dev/null
then
chown -R $OIDC_DEMO_APP_USER:adm $OIDC_DEMO_APP_HOME
chmod u=rwx,g=rxs,o= $OIDC_DEMO_APP_HOME
fi
;;
esac
UNIT="cacert-oidc-demo-app.service"
case "$1" in
'configure' | 'abort-upgrade' | 'abort-deconfigure' | 'abort-remove')
# systemctl daemon-reload
# systemctl --global enable $UNIT
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask $UNIT >/dev/null || true
# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled $UNIT ; then
# Enables the unit on first installation, creates new
# symlinks on upgrades if the unit file has changed.
deb-systemd-helper enable $UNIT >/dev/null || true
else
# Update the statefile to add new symlinks (if any), which need to be
# cleaned up on purge. Also remove old symlinks.
deb-systemd-helper update-state $UNIT >/dev/null || true
fi
;;
esac