+get_avail_linux() {
+ # This is wrong, but leaves room for when we have to care for machines running
+ # myfirstunix-image-0.1-dsa-arm
+ local prefix=linux
+
+ local kervers=$(uname -r)
+
+ local metavers=''
+
+ # DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
+ # Debian uses versions of the form 2.6.29-2-amd64
+ if [ "${kervers//dsa}" != "$kervers" ]; then
+ metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
+ else
+ metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
+ fi
+
+ # Attempt to track back to a metapackage failed. bail
+ if [ "$metavers" = "$kervers" ]; then
+ return 2
+ fi
+
+ # We're just going to give up if we can't find a matching metapackage
+ # I tried being strict once, and it just caused a lot of headaches. We'll see how
+ # being lax does for us
+
+ local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
+ local metaavailvers=$(echo "$output" | grep '^ Candidate:' | awk '{print $2}')
+ local metainstavers=$(echo "$output" | grep '^ Installed:' | awk '{print $2}')
+
+ if [ -z "$metaavailvers" ] || [ "$metaavailvers" = '(none)' ]; then
+ return 2
+ fi
+ if [ -z "$metainstavers" ] || [ "$metainstavers" = '(none)' ]; then
+ return 2
+ fi
+
+ if [ "$metaavailvers" != "$metainstavers" ] ; then
+ echo "${prefix}-image-${metavers} $metaavailvers available but $metainstavers installed"
+ return 1
+ fi
+
+ local imagename=0
+ # --no-all-versions show shows only the candidate
+ for vers in $(apt-cache --no-all-versions show ${prefix}-image-${metavers} | sed -n 's/^Depends: //p' | tr ',' '\n' | tr -d ' ' | grep ${prefix}-image | awk '{print $1}' | sort -u); do
+ if dpkg --compare-versions $vers gt $imagename; then
+ imagename=$vers
+ fi
+ done
+
+ if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
+ return 2
+ fi
+
+ if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
+ if dpkg --compare-versions "$imagename" lt "${prefix}-image-${kervers}"; then
+ return 2
+ fi
+ echo "$imagename" != "${prefix}-image-${kervers}"
+ return 1
+ fi
+
+ local availvrs=$(apt-cache policy ${imagename} 2>/dev/null | grep '^ Candidate' | awk '{print $2}')
+ local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^ Installed:' | awk '{print $2}')
+
+ if [ "$availvrs" = "$kernelversion" ]; then
+ return 0
+ fi
+
+ echo "$kernelversion != $availvrs"
+ return 1
+}
+
+get_image_linux() {
+ local image GZHDR1 GZHDR2 LZHDR off