update xz file magic to find newer kernel zImages

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 a5874dc..9d04d45 100755 (executable)
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -128,7 +128,8 @@ get_image_linux() {
 
        GZHDR1="\x1f\x8b\x08\x00"
        GZHDR2="\x1f\x8b\x08\x08"
-       LZHDR="\x00\x00\x00\x02\xff"
+       LZHDR1="\x00\x00\x00\x02\xff"
+       LZHDR2="\x00\x00\x00\x04\xff"
 
        off=`get_offset "$image" $GZHDR1`
        [ "$?" != "0" ] && off="-1"
@@ -144,8 +145,12 @@ get_image_linux() {
                return
        fi
 
-       off=`get_offset "$image" $LZHDR`
+       off=`get_offset "$image" $LZHDR1`
        [ "$?" != "0" ] && off="-1"
+       if [ "$off" -eq "-1" ]; then
+               off=`get_offset "$image" $LZHDR2`
+               [ "$?" != "0" ] && off="-1"
+       fi
        if [ "$off" -ne "-1" ]; then
                (dd ibs="$[off-1]" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | xzcat 2>/dev/null
                return