diskimage-builder/bin/disk-image-get-kernel
Steve Kowalik 58c755cf4c Create a new baremetal element
Rather than using a script to mount the image using nbd to extract the
kernel and ramdisk, make a new element called baremetal, which contains
a cleanup.d script that will copy them out to <image name>.{vmlinuz,initrd}.

Closes-Bug: 1224669
Change-Id: I8f3569aa12148d18b1c8242b6fbbd8857894b26f
2014-01-21 16:48:20 +11:00

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#!/bin/bash
#
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
set -e
SCRIPTNAME=$(basename $0)
SCRIPT_HOME=$(dirname $0)
if [ -d $SCRIPT_HOME/../share/diskimage-builder ]
then
export _PREFIX=$SCRIPT_HOME/../share/diskimage-builder
else
export _PREFIX=$SCRIPT_HOME/..
fi
export _LIB=$_PREFIX/lib
source $_LIB/die
function show_options () {
echo "Usage: $SCRIPTNAME -i <image> [-d <outdir>] [-o <prefix]"
echo
echo "Options:"
echo " -i filename -- extract kernel + ramdisk from this file"
echo " -d dir -- save files in \$dir; defaults to /tmp"
echo " -o prefix -- set the prefix of the output files; defaults to 'baremetal'"
echo " eg, baremetal-vmlinuz and baremetal-initrd"
echo " -x -- turn on tracing"
echo " -h -- print this message"
exit 0
}
echo 'DEPRECATED: Please consider using the `baremetal` element.'
echo
TEMP=`getopt -o hd:i:o:x -n $SCRIPTNAME -- "$@"`
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"
export OUT_DIR=/tmp
export OUT_PFX=baremetal
while true ; do
case "$1" in
-d) export OUT_DIR=$2; shift 2 ;;
-i) export IMAGE_FILE=$2; shift 2 ;;
-o) export OUT_PFX=$2; shift 2 ;;
-h) show_options;;
-x) shift; set -x;;
--) shift ; break ;;
*) echo "Internal error!" ; exit 1 ;;
esac
done
if [[ ! -n "$IMAGE_FILE" ]]; then
die "You must specify an image to read from with -i \$filename"
elif [[ ! -r "$IMAGE_FILE" ]]; then
die "Image file $IMAGE_FILE is not readable"
fi
source $_LIB/img-defaults
source $_LIB/common-functions
source $_LIB/img-functions
echo "Extracting kernel + ramdisk from $IMAGE_FILE to $OUT_PFX-vmlinuz and $OUT_PFX-initrd in $OUT_DIR"
ensure_nbd
# sets WORK_DIR
mount_qcow_image $IMAGE_FILE
# Dig up the initrd and kernel to use.
BOOTDIR="$WORK_DIR/boot"
KERNEL=
RAMDISK=
if [ -f $WORK_DIR/etc/redhat-release ]; then
# Prioritize PAE if present
KERNEL=$(ls -1rv $BOOTDIR/vmlinuz* | grep PAE | grep -v debug | head -1)
if [ ! $KERNEL ]; then
KERNEL=$(ls -1rv $BOOTDIR/vmlinuz* | grep -v debug | head -1)
if [ ! $KERNEL ]; then
echo "No suitable kernel found."
exit 1
fi
fi
KERNEL=$(basename $KERNEL)
KERNEL_VERSION=`echo $KERNEL | sed 's/vmlinuz-//g'`
RAMDISK=$(basename `ls $BOOTDIR/initramfs-$KERNEL_VERSION.img`)
if [ ! $RAMDISK ]; then
echo "Can't find an initramfs for the $KERNEL_VERSION version of the kernel."
exit 1
fi
elif [ -f $WORK_DIR/etc/debian_version ]; then
KERNEL=$(basename `ls -1rv $BOOTDIR/vmlinuz*generic | head -1`)
RAMDISK=$(basename `ls -1rv $BOOTDIR/initrd*generic | head -1`)
else
echo "ERROR: Unable to detect operating system"
exit 1
fi
sudo cp $BOOTDIR/$KERNEL $OUT_DIR/$OUT_PFX-vmlinuz
sudo cp $BOOTDIR/$RAMDISK $OUT_DIR/$OUT_PFX-initrd
sudo chmod a+r $OUT_DIR/$OUT_PFX-vmlinuz
sudo chmod a+r $OUT_DIR/$OUT_PFX-initrd
unmount_qcow_image