echo "$grp" | grep -q ":$" && delim=""
[ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
+ selinuxenabled 2>/dev/null && restorecon /etc/group
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
}