#! /bin/sh

lockfile="/home/short/bin/kratochvil.vellum.cz-update.lock"
kratochvil_IP="`echo "${SSH_CLIENT:-$SSH2_CLIENT}"|cut -d ' ' -f 1`"
kratochvil_IP="${1:-$kratochvil_IP}"
kratochvil_IP_back="`echo "$kratochvil_IP"|sed 's/\./\\\\./g'`"
named_dir="/etc/named"
cf_file="$named_dir/cf/kratochvil.vellum.cz"

if [ -f "$lockfile" ];then lockmsg=true;else lockmsg=false;fi
if $lockmsg;then echo -n "$0: Locking \"$lockfile\"...";fi
lockfile -l 60 "$lockfile"
trap 'rm -f "$lockfile"' EXIT
if $lockmsg;then echo " done.";fi

if grep -q '^  `'"$kratochvil_IP_back'"'$' "$cf_file";then
	echo "$0: Nothing to do, $kratochvil_IP already present."
	exit 0
	fi

echo "$0: Updating new IP $kratochvil_IP..."
echo -e '%s#\(^  `\)[0-9.]*\('"'"'\)$#\\1'"$kratochvil_IP"'\\2#\nw'|ed -s "$cf_file"
make -C "$named_dir" --assume-new="ver/.version"
/home/short/secure/ndc-reload-short kratochvil.vellum.cz
echo "$0: Update done."
exit 0