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#!/bin/bash # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- # ex: ts=8 sw=4 sts=4 et filetype=sh # # Copyright 2005-2010 Harald Hoyer <harald@redhat.com> # Copyright 2005-2010 Red Hat, Inc. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # usage() { { echo "Usage: ${0##*/} [options] [<initramfs file> [<filename> [<filename> [...] ]]]" echo "Usage: ${0##*/} [options] -k <kernel version>" echo echo "-h, --help print a help message and exit." echo "-s, --size sort the contents of the initramfs by size." echo "-m, --mod list modules." echo "-f, --file <filename> print the contents of <filename>." echo "-k, --kver <kernel version> inspect the initramfs of <kernel version>." echo } >&2 } [[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut sorted=0 modules=0 declare -A filenames unset POSIXLY_CORRECT TEMP=$(getopt \ -o "shmf:k:" \ --long kver: \ --long file: \ --long mod \ --long help \ --long size \ -- "$@") if (( $? != 0 )); then usage exit 1 fi eval set -- "$TEMP" while (($# > 0)); do case $1 in -k|--kver) KERNEL_VERSION="$2"; shift;; -f|--file) filenames[${2#/}]=1; shift;; -s|--size) sorted=1;; -h|--help) usage; exit 0;; -m|--mod) modules=1;; --) shift;break;; *) usage; exit 1;; esac shift done [[ $KERNEL_VERSION ]] || KERNEL_VERSION="$(uname -r)" if [[ $1 ]]; then image="$1" if ! [[ -f "$image" ]]; then { echo "$image does not exist" echo } >&2 usage exit 1 fi else [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id if [[ -d /boot/loader/entries || -L /boot/loader/entries ]] \ && [[ $MACHINE_ID ]] \ && [[ -d /boot/${MACHINE_ID} || -L /boot/${MACHINE_ID} ]] ; then image="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd" else image="/boot/initramfs-${KERNEL_VERSION}.img" fi fi shift while (($# > 0)); do filenames[${1#/}]=1; shift done if ! [[ -f "$image" ]]; then { echo "No <initramfs file> specified and the default image '$image' cannot be accessed!" echo } >&2 usage exit 1 fi extract_files() { (( ${#filenames[@]} == 1 )) && nofileinfo=1 for f in "${!filenames[@]}"; do [[ $nofileinfo ]] || echo "initramfs:/$f" [[ $nofileinfo ]] || echo "========================================================================" $CAT $image 2>/dev/null | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null ((ret+=$?)) [[ $nofileinfo ]] || echo "========================================================================" [[ $nofileinfo ]] || echo done } list_modules() { echo "dracut modules:" $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/modules.txt' 'usr/lib/dracut/modules.txt' 2>/dev/null ((ret+=$?)) } list_files() { echo "========================================================================" if [ "$sorted" -eq 1 ]; then $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --list | sort -n -k5 else $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --list | sort -k9 fi ((ret+=$?)) echo "========================================================================" } if (( ${#filenames[@]} <= 0 )); then echo "Image: $image: $(du -h $image | while read a b; do echo $a;done)" echo "========================================================================" fi read -N 6 bin < "$image" case $bin in $'\x71\xc7'*|070701) CAT="cat --" is_early=$(cpio --extract --verbose --quiet --to-stdout -- 'early_cpio' < "$image" 2>/dev/null) if [[ "$is_early" ]]; then if (( ${#filenames[@]} > 0 )); then extract_files else echo "Early CPIO image" list_files fi SKIP="$dracutbasedir/skipcpio" if ! [[ -x $SKIP ]]; then echo echo "'$SKIP' not found, cannot display remaining contents!" >&2 echo exit 0 fi fi ;; esac if [[ $SKIP ]] ; then bin="$($SKIP "$image" | { read -N 6 bin && echo "$bin" ; })" else read -N 6 bin < "$image" fi case $bin in $'\x1f\x8b'*) CAT="zcat --" ;; BZh*) CAT="bzcat --" ;; $'\x71\xc7'*|070701) CAT="cat --" ;; $'\x02\x21'*) CAT="lz4 -d -c" ;; $'\x89'LZO$'\0'*) CAT="lzop -d -c" ;; *) if echo "test"|xz|xzcat --single-stream >/dev/null 2>&1; then CAT="xzcat --single-stream --" else CAT="xzcat --" fi ;; esac skipcpio() { $SKIP "$@" | $ORIG_CAT } if [[ $SKIP ]]; then ORIG_CAT="$CAT" CAT=skipcpio fi ret=0 if (( ${#filenames[@]} > 0 )); then extract_files else version=$($CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/dracut-*' 'usr/lib/dracut/dracut-*' 2>/dev/null) ((ret+=$?)) echo "Version: $version" echo if [ "$modules" -eq 1 ]; then list_modules echo "========================================================================" else echo -n "Arguments: " $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout -- 'lib/dracut/build-parameter.txt' 'usr/lib/dracut/build-parameter.txt' 2>/dev/null echo list_modules list_files fi fi exit $ret
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