#!/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.
usage()
{
- echo "Usage: $(${0##*/}) [-s] [<initramfs file> [<filename>]]"
+ {
+ 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 "--unpack unpack the initramfs, instead of displaying the contents."
+ echo " If optional filenames are given, will only unpack specified files,"
+ echo " else the whole image will be unpacked. Won't unpack anything from early cpio part."
+ echo "--unpackearly unpack the early microcode part of the initramfs."
+ echo " Same as --unpack, but only unpack files from early cpio part."
+ echo "-v, --verbose unpack verbosely."
+ echo "-k, --kver <kernel version> inspect the initramfs of <kernel version>."
+ echo
+ } >&2
}
-[[ $# -le 2 ]] || { usage ; exit 1 ; }
+
+[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
sorted=0
-while getopts "s" opt; do
- case $opt in
- s) sorted=1;;
- h) usage; exit 0;;
- \?) usage; exit 1;;
+modules=0
+unset verbose
+declare -A filenames
+
+unset POSIXLY_CORRECT
+TEMP=$(getopt \
+ -o "vshmf:k:" \
+ --long kver: \
+ --long file: \
+ --long mod \
+ --long help \
+ --long size \
+ --long unpack \
+ --long unpackearly \
+ --long verbose \
+ -- "$@")
+
+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;;
+ -v|--verbose) verbose="--verbose";;
+ --unpack) unpack=1;;
+ --unpackearly) unpackearly=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
-shift $((OPTIND-1))
-image="${1:-/boot/initramfs-$(uname -r).img}"
-[[ -f "$image" ]] || { echo "$image does not exist" ; exit 1 ; }
+if ! [[ -f "$image" ]]; then
+ {
+ echo "No <initramfs file> specified and the default image '$image' cannot be accessed!"
+ echo
+ } >&2
+ usage
+ exit 1
+fi
+
+dracutlibdirs() {
+ for d in lib64/dracut lib/dracut usr/lib64/dracut usr/lib/dracut; do
+ echo "$d/$1"
+ done
+}
+
+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" | cpio --extract --verbose --quiet --to-stdout -- \
+ $(dracutlibdirs modules.txt) 2>/dev/null
+ ((ret+=$?))
+}
+
+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+=$?))
+ echo "========================================================================"
+}
+
+list_squash_content()
+{
+ SQUASH_IMG="squash/root.img"
+ SQUASH_TMPFILE="$(mktemp -t --suffix=.root.sqsh lsinitrd.XXXXXX)"
+ trap "rm -f '$SQUASH_TMPFILE'" EXIT
+ $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout -- \
+ $SQUASH_IMG > "$SQUASH_TMPFILE" 2>/dev/null
+ if [[ -s $SQUASH_TMPFILE ]]; then
+ echo "Squashed content ($SQUASH_IMG):"
+ echo "========================================================================"
+ unsquashfs -ll "$SQUASH_TMPFILE" | tail -n +4
+ echo "========================================================================"
+ fi
+}
+
+unpack_files()
+{
+ if (( ${#filenames[@]} > 0 )); then
+ for f in "${!filenames[@]}"; do
+ $CAT "$image" 2>/dev/null | cpio -id --quiet $verbose $f
+ ((ret+=$?))
+ done
+ else
+ $CAT "$image" 2>/dev/null | cpio -id --quiet $verbose
+ ((ret+=$?))
+ fi
+}
+
-CAT=zcat
-FILE_T=$(file --dereference "$image")
+if (( ${#filenames[@]} <= 0 )) && [[ -z "$unpack" ]] && [[ -z "$unpackearly" ]]; then
+ echo "Image: $image: $(du -h $image | while read a b || [ -n "$a" ]; do echo $a;done)"
+ echo "========================================================================"
+fi
-if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
- XZ_SINGLE_STREAM="--single-stream"
+read -N 6 bin < "$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 [[ -n "$unpack" ]]; then
+ # should use --unpackearly for early CPIO
+ :
+ elif [[ -n "$unpackearly" ]]; then
+ unpack_files
+ elif (( ${#filenames[@]} > 0 )); then
+ extract_files
+ else
+ echo "Early CPIO image"
+ list_files
+ fi
+ if [[ -d "$dracutbasedir/skipcpio" ]]; then
+ SKIP="$dracutbasedir/skipcpio/skipcpio"
+ else
+ SKIP="$dracutbasedir/skipcpio"
+ fi
+ 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"
+ ;;
+ $'\x28\xB5\x2F\xFD'*)
+ CAT="zstd -d -c"
+ ;;
+ *)
+ if echo "test"|xz|xzcat --single-stream >/dev/null 2>&1; then
+ CAT="xzcat --single-stream --"
+ else
+ CAT="xzcat --"
+ fi
+ ;;
+esac
-if [[ "$FILE_T" =~ :\ gzip\ compressed\ data ]]; then
- CAT=zcat
-elif [[ "$FILE_T" =~ :\ xz\ compressed\ data ]]; then
- CAT="xzcat $XZ_SINGLE_STREAM"
-elif [[ "$FILE_T" =~ :\ XZ\ compressed\ data ]]; then
- CAT="xzcat $XZ_SINGLE_STREAM"
-elif [[ "$FILE_T" =~ :\ LZMA ]]; then
- CAT="xzcat $XZ_SINGLE_STREAM"
-elif [[ "$FILE_T" =~ :\ data ]]; then
- CAT="xzcat $XZ_SINGLE_STREAM"
+skipcpio()
+{
+ $SKIP "$@" | $ORIG_CAT
+}
+
+if [[ $SKIP ]]; then
+ ORIG_CAT="$CAT"
+ CAT=skipcpio
fi
-if [[ $# -eq 2 ]]; then
- $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
- exit $?
+if (( ${#filenames[@]} > 1 )); then
+ TMPFILE="$(mktemp -t --suffix=.cpio lsinitrd.XXXXXX)"
+ $CAT "$image" 2>/dev/null > $TMPFILE
+ trap "rm -f '$TMPFILE'" EXIT
+ pre_decompress()
+ {
+ cat $TMPFILE
+ }
+ CAT=pre_decompress
fi
-echo "$image: $(du -h $image | while read a b; do echo $a;done)"
-echo "========================================================================"
-$CAT "$image" | cpio --extract --verbose --quiet --to-stdout '*lib/dracut/dracut-*' 2>/dev/null
-echo "========================================================================"
-if [ "$sorted" -eq 1 ]; then
- $CAT "$image" | cpio --extract --verbose --quiet --list | sort -n -k5
+ret=0
+
+if [[ -n "$unpack" ]]; then
+ unpack_files
+elif (( ${#filenames[@]} > 0 )); then
+ extract_files
else
- $CAT "$image" | cpio --extract --verbose --quiet --list
+ version=$($CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- \
+ $(dracutlibdirs 'dracut-*') 2>/dev/null)
+ ((ret+=$?))
+ echo "Version: $version"
+ echo
+ if [ "$modules" -eq 1 ]; then
+ list_modules
+ echo "========================================================================"
+ else
+ echo -n "Arguments: "
+ $CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- \
+ $(dracutlibdirs build-parameter.txt) 2>/dev/null
+ echo
+ list_modules
+ list_files
+ list_squash_content
+ fi
fi
-echo "========================================================================"
+
+exit $ret