chrony 3.2-4ubuntu4 / postinst

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

set -e


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

case "$1" in
    configure)

        if ! getent passwd _chrony > /dev/null 2>&1
        then
            echo "Creating '_chrony' system user/group for the chronyd daemon…"
            adduser --force-badname \
                    --system \
                    --group \
                    --quiet \
                    --gecos "Chrony daemon" \
                    --home /var/lib/chrony \
                    --no-create-home _chrony
        fi

        # Change the owner of "/var/l{ib,og}/chrony" directories and their
        # subfiles to "_chrony" only if the user has not set the "user"
        # directive in chrony.conf
        if ! grep "^user" /etc/chrony/chrony.conf > /dev/null 2>&1; then
            chown _chrony:_chrony /var/lib/chrony
            if [ -d /var/log/chrony ]; then
                chown _chrony:_chrony /var/log/chrony
            fi
        fi

        # Before version 2.2.1-1, we used to create the chrony.keys file from
        # the post-installation script and fed it with a random command password.
        # Since that command password isn’t needed anymore, a simple key file
        # template has been created which is then copied to its destination by ucf.
        # The consequence of this move was a prompt presented to the user on
        # upgrade even if the key file has been unmodified; this is a violation
        # of Debian policy § 10.7.3! The script below workaround that issue by
        # deleting the key file when upgrading from chrony < 2.2.1-1 iff a single
        # key if found in the file and that the key ID correspond to the ID
        # specified by the commandkey ID found in “chrony.conf” and that the
        # original key file has the same modes and owners than the new template
        # key file.
        # Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820087
        if [ -n "$2" ] && dpkg --compare-versions "$2" lt "2.2.1-1"; then
            commandkey_id=$(awk '$1 ~ /^commandkey$/ { print $2; exit }' /etc/chrony/chrony.conf)
            key_id=$(awk '{ print $1; exit }' /etc/chrony/chrony.keys)
            orig_keyfile_perm=$(stat -c "%a%u%g" /etc/chrony/chrony.keys 2> /dev/null)
            keyfile_tml_perm=$(stat -c "%a%u%g" /usr/share/chrony/chrony.keys 2> /dev/null)
            if [ "$(grep -c "^[0-9]" /etc/chrony/chrony.keys)" -eq 1 ] &&
                [ "$commandkey_id" -eq "$key_id" ] 2>/dev/null &&
                 [ "$orig_keyfile_perm" = "$keyfile_tml_perm" ]; then
                rm -f /etc/chrony/chrony.keys
            fi
        fi

        if `which 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 "$(which ucfr)" ]; then
                ucfr chrony /etc/chrony/chrony.conf
                ucfr chrony /etc/chrony/chrony.keys
            fi
        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.

# Automatically added by dh_apparmor/2.12-4ubuntu5
aa_is_enabled() {
   if command aa-enabled >/dev/null 2>&1; then
      # apparmor >= 2.10.95-2
      aa-enabled --quiet 2>/dev/null
   else
      # apparmor << 2.10.95-2
      # (This should be removed once Debian Stretch and Ubuntu 18.04 are out.)
      rc=0
      aa-status --enabled 2>/dev/null || rc=$?
      [ "$rc" = 0 ] || [ "$rc" = 2 ]
   fi
}

if [ "$1" = "configure" ]; then
    APP_PROFILE="/etc/apparmor.d/usr.sbin.chronyd"
    if [ -f "$APP_PROFILE" ]; then
        # Add the local/ include
        LOCAL_APP_PROFILE="/etc/apparmor.d/local/usr.sbin.chronyd"

        test -e "$LOCAL_APP_PROFILE" || {
            mkdir -p `dirname "$LOCAL_APP_PROFILE"`
            install --mode 644 /dev/null "$LOCAL_APP_PROFILE"
        }

        # Reload the profile, including any abstraction updates
        if aa_is_enabled; then
            apparmor_parser -r -T -W "$APP_PROFILE" || true
        fi
    fi
fi
# End automatically added section
# Automatically added by dh_installdeb/11.1.6ubuntu1
dpkg-maintscript-helper rm_conffile /etc/apm/event.d/01chrony 2.4.1-3\~ chrony -- "$@"
# End automatically added section
# Automatically added by dh_installinit/11.1.6ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/chrony" ]; then
		update-rc.d chrony defaults >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d chrony $_dh_action || exit 1
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/11.1.6ubuntu1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# This will only remove masks created by d-s-h on package removal.
	deb-systemd-helper unmask 'chrony.service' >/dev/null || true

	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'chrony.service'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'chrony.service' >/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 'chrony.service' >/dev/null || true
	fi
fi
# End automatically added section


exit 0