use xzcat to unpack kernel image, not lzcat

Signed-off-by: Martin Zobel-Helas <zobel@debian.org>

diff --git a/dsa-nagios-checks/checks/dsa-check-running-kernel b/dsa-nagios-checks/checks/dsa-check-running-kernel
index 0ff3ed3..a5874dc 100755 (executable)
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -147,7 +147,7 @@ get_image_linux() {
        off=`get_offset "$image" $LZHDR`
        [ "$?" != "0" ] && off="-1"
        if [ "$off" -ne "-1" ]; then
-               (dd ibs="$[off-1]" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | lzcat 2>/dev/null
+               (dd ibs="$[off-1]" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | xzcat 2>/dev/null
                return
        fi