#!/bin/sh
# postinst script for chrony
#
# see: dh_installdeb(1)

set -e


# targets: configure|abort-upgrade|abort-remove|abort-deconfigure

case "$1" in
    configure)

        adduser --force-badname \
                --system \
                --group \
                --quiet \
                --gecos "Chrony daemon" \
                --home /var/lib/chrony \
                --no-create-home _chrony

        if command -v ucf >/dev/null
        then
            ucf --three-way /usr/share/chrony/chrony.conf /etc/chrony/chrony.conf
            ucf --three-way /usr/share/chrony/chrony.keys /etc/chrony/chrony.keys
            if [ -x "$(command -v ucfr)" ]; then
                ucfr chrony /etc/chrony/chrony.conf
                ucfr chrony /etc/chrony/chrony.keys
            fi
        fi

        # Change the user and group ownership of "/var/l{ib,og}/chrony" iif
        # the chronyd's configuration does not contain the "user" directive.
        # Also, update these directories' mode bits to 0750 to follow upstream.
        if ! chronyd -p 2>/dev/null | grep -q "^user"; then
            for d in /var/lib/chrony /var/log/chrony; do
                if ! dpkg-statoverride --list "$d" >/dev/null; then
                    dpkg-statoverride --update --add _chrony _chrony 0750 "$d"
                fi
            done
        fi

        if [ -n "$2" ] && dpkg --compare-versions "$2" lt 4.0~pre4-1; then
            # Migrate NTP sources obtained from DHCP to /run/chrony-dhcp
            mkdir -p /run/chrony-dhcp
            for file in $(find /var/lib/dhcp/ -type f -name "chrony.servers.*"); do
                sed 's/.*/server &/' < "$file" > /run/chrony-dhcp/"${file##*servers.}.sources"
            done

            # Remove the staled PID file resulting from migrating its path from
            # /run to /run/chrony/. Overriding dh_installinit and
            # dh_systemd_start to use the --no-restart-after-upgrade option
            # was a possibility but chronyd would have been down even longer
            # during the upgrade.
            rm -f /run/chronyd.pid
        fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0