#! /bin/sh
set -e

isDigit() {
	test -n "$1" || return 1
	string="$1"
	while [ "${string#[[:digit:]]}" != "$string" ]; do
		string="${string#[[:digit:]]}"
	done
	[ -z "$string" ] || return 1
}

# Remove cron.daily file which has been installed by old (and bugged)
# apticron versions. (see #587597)
DPKG_MAINTSCRIPT_NAME=${DPKG_MAINTSCRIPT_NAME:-postinst} \
dpkg-maintscript-helper rm_conffile /etc/cron.daily/apticron "1.1.44" apticron -- "$@"

case "$1" in
    configure)

	# Move the old timestamp file
	tsfile_new='/var/lib/apticron/cron_run'
	tsfile_old='/var/lib/misc/apticron.cron'
	if [ -f "$tsfile_old" ] ; then
		if [ ! -e "$tsfile_new" ] ; then
			mv "$tsfile_old" "$tsfile_new"
		else
			rm -f "$tsfile_old"
		fi
	fi

	# read time from cron.d job, if any
	if [ -f /etc/cron.d/apticron ] ; then

		min=$( grep -v '^[[:space:]]*\(\#\|$\)' /etc/cron.d/apticron \
			2>/dev/null | {
			read min null
			isDigit "$min" && echo "$min"
			} ) || true

	fi

	# get random time if cron.d snippet doesn't exist or is malformed
	if ! isDigit "$min" ; then
		min=$(( $( od -vAn -N2 -tu4 < /dev/urandom ) % 60 ))
	fi

	tmpfile="$( mktemp -t apticron.crond.XXXXXXXXXX )"
	chmod 0644 "$tmpfile"

	cat <<EOF >"$tmpfile"
# cron entry for apticron

$min * * * * root if test -x /usr/sbin/apticron; then /usr/sbin/apticron --cron; else true; fi
EOF
	ucf --debconf-ok --three-way "$tmpfile" /etc/cron.d/apticron
	rm -f "$tmpfile"

    ;;

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

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



exit 0