#!/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.
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
-usage()
-{
- echo "Usage: $(${0##*/}) [-s] [<initramfs file> [<filename>]]"
+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 "--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 \
+ -- "$@")
+
+# shellcheck disable=SC2181
+if (($? != 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
-shift $((OPTIND-1))
-image="${1:-/boot/initramfs-$(uname -r).img}"
-[[ -f "$image" ]] || { echo "$image does not exist" ; exit 1 ; }
+[[ $KERNEL_VERSION ]] || KERNEL_VERSION="$(uname -r)"
-CAT=zcat
-FILE_T=$(file --dereference "$image")
+if [[ $1 ]]; then
+ image="$1"
+ if ! [[ -f $image ]]; then
+ {
+ echo "$image does not exist"
+ echo
+ } >&2
+ usage
+ exit 1
+ fi
+else
+ if [[ -d /efi/Default ]] || [[ -d /boot/Default ]] || [[ -d /boot/efi/Default ]]; then
+ MACHINE_ID="Default"
+ elif [[ -s /etc/machine-id ]]; then
+ read -r MACHINE_ID < /etc/machine-id
+ [[ $MACHINE_ID == "uninitialized" ]] && MACHINE_ID="Default"
+ else
+ MACHINE_ID="Default"
+ fi
-if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
- XZ_SINGLE_STREAM="--single-stream"
+ if [[ -d /efi/loader/entries || -L /efi/loader/entries ]] \
+ && [[ $MACHINE_ID ]] \
+ && [[ -d /efi/${MACHINE_ID} || -L /efi/${MACHINE_ID} ]]; then
+ image="/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
+ elif [[ -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"
+ elif [[ -d /boot/efi/loader/entries || -L /boot/efi/loader/entries ]] \
+ && [[ $MACHINE_ID ]] \
+ && [[ -d /boot/efi/${MACHINE_ID} || -L /boot/efi/${MACHINE_ID} ]]; then
+ image="/boot/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
+ elif [[ -f /lib/modules/${KERNEL_VERSION}/initrd ]]; then
+ image="/lib/modules/${KERNEL_VERSION}/initrd"
+ elif [[ -f /lib/modules/${KERNEL_VERSION}/initramfs.img ]]; then
+ image="/lib/modules/${KERNEL_VERSION}/initramfs.img"
+ elif [[ -f /boot/initramfs-${KERNEL_VERSION}.img ]]; then
+ image="/boot/initramfs-${KERNEL_VERSION}.img"
+ elif [[ $MACHINE_ID ]] \
+ && mountpoint -q /efi; then
+ image="/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
+ elif [[ $MACHINE_ID ]] \
+ && mountpoint -q /boot/efi; then
+ image="/boot/efi/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
+ else
+ image=""
+ fi
fi
-if [[ "$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 $XZ_SINGLE_STREAM"
+shift
+while (($# > 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
-if [[ $# -eq 2 ]]; then
- $CAT $image | cpio --extract --verbose --quiet --to-stdout ${2#/} 2>/dev/null
- exit $?
+TMPDIR="$(mktemp -d -t lsinitrd.XXXXXX)"
+# shellcheck disable=SC2064
+trap "rm -rf '$TMPDIR'" EXIT
+
+dracutlibdirs() {
+ for d in lib64/dracut lib/dracut usr/lib64/dracut usr/lib/dracut; do
+ echo "$d/$1"
+ done
+}
+
+extract_files() {
+ ((${#filenames[@]} == 1)) && nofileinfo=1
+ for f in "${!filenames[@]}"; do
+ [[ $nofileinfo ]] || echo "initramfs:/$f"
+ [[ $nofileinfo ]] || echo "========================================================================"
+ # shellcheck disable=SC2001
+ [[ $f == *"\\x"* ]] && f=$(echo "$f" | sed 's/\\x.\{2\}/????/g')
+ $CAT "$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:"
+ # shellcheck disable=SC2046
+ $CAT "$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 += $?))
+ echo "========================================================================"
+}
+
+list_squash_content() {
+ SQUASH_IMG="squash-root.img"
+ SQUASH_TMPFILE="$TMPDIR/initrd.root.sqsh"
+
+ $CAT "$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
+ # shellcheck disable=SC2001
+ [[ $f == *"\\x"* ]] && f=$(echo "$f" | sed 's/\\x.\{2\}/????/g')
+ $CAT "$image" 2> /dev/null | cpio -id --quiet $verbose "$f"
+ ((ret += $?))
+ done
+ else
+ $CAT "$image" 2> /dev/null | cpio -id --quiet $verbose
+ ((ret += $?))
+ fi
+}
+
+read -r -N 2 bin < "$image"
+if [ "$bin" = "MZ" ]; then
+ command -v objcopy > /dev/null || {
+ echo "Need 'objcopy' to unpack an UEFI executable."
+ exit 1
+ }
+ objcopy \
+ --dump-section .linux="$TMPDIR/vmlinuz" \
+ --dump-section .initrd="$TMPDIR/initrd.img" \
+ --dump-section .cmdline="$TMPDIR/cmdline.txt" \
+ --dump-section .osrel="$TMPDIR/osrel.txt" \
+ "$image" /dev/null
+ uefi="$image"
+ image="$TMPDIR/initrd.img"
+ [ -f "$image" ] || exit 1
+fi
+
+if ((${#filenames[@]} <= 0)) && [[ -z $unpack ]] && [[ -z $unpackearly ]]; then
+ if [ -n "$uefi" ]; then
+ echo -n "initrd in UEFI: $uefi: "
+ du -h "$image" | while read -r a _ || [ -n "$a" ]; do echo "$a"; done
+ if [ -f "$TMPDIR/osrel.txt" ]; then
+ name=$(sed -En '/^PRETTY_NAME/ s/^\w+=["'"'"']?([^"'"'"'$]*)["'"'"']?/\1/p' "$TMPDIR/osrel.txt")
+ id=$(sed -En '/^ID/ s/^\w+=["'"'"']?([^"'"'"'$]*)["'"'"']?/\1/p' "$TMPDIR/osrel.txt")
+ build=$(sed -En '/^BUILD_ID/ s/^\w+=["'"'"']?([^"'"'"'$]*)["'"'"']?/\1/p' "$TMPDIR/osrel.txt")
+ echo "OS Release: $name (${id}-${build})"
+ fi
+ if [ -f "$TMPDIR/vmlinuz" ]; then
+ version=$(strings -n 20 "$TMPDIR/vmlinuz" | sed -En '/[0-9]+\.[0-9]+\.[0-9]+/ { p; q 0 }')
+ echo "Kernel Version: $version"
+ fi
+ if [ -f "$TMPDIR/cmdline.txt" ]; then
+ echo "Command line:"
+ sed -En 's/\s+/\n/g; s/\x00/\n/; p' "$TMPDIR/cmdline.txt"
+ fi
+ else
+ echo -n "Image: $image: "
+ du -h "$image" | while read -r a _ || [ -n "$a" ]; do echo "$a"; done
+ fi
+
+ echo "========================================================================"
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
+read -r -N 6 bin < "$image"
+case $bin in
+ $'\x71\xc7'* | 070701)
+ CAT="cat --"
+ is_early=$(cpio --extract --verbose --quiet --to-stdout -- 'early_cpio' < "$image" 2> /dev/null)
+ # Debian mkinitramfs does not create the file 'early_cpio', so let's check if firmware files exist
+ [[ "$is_early" ]] || is_early=$(cpio --list --verbose --quiet --to-stdout -- 'kernel/*/microcode/*.bin' < "$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 "$dracutbasedir/src/skipcpio" ]]; then
+ SKIP="$dracutbasedir/src/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 -r -N 6 bin && echo "$bin"; })"
else
- $CAT "$image" | cpio --extract --verbose --quiet --list
+ read -r -N 6 bin < "$image"
fi
-echo "========================================================================"
+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"
+ ;;
+ $'\x28\xB5\x2F\xFD'*)
+ CAT="zstd -d -c"
+ ;;
+ *)
+ if echo "test" | xz | xzcat --single-stream > /dev/null 2>&1; then
+ CAT="xzcat --single-stream --"
+ else
+ CAT="xzcat --"
+ fi
+ ;;
+esac
+
+type "${CAT%% *}" > /dev/null 2>&1 || {
+ echo "Need '${CAT%% *}' to unpack the initramfs."
+ exit 1
+}
+
+skipcpio() {
+ $SKIP "$@" | $ORIG_CAT
+}
+
+if [[ $SKIP ]]; then
+ ORIG_CAT="$CAT"
+ CAT=skipcpio
+fi
+
+if ((${#filenames[@]} > 1)); then
+ TMPFILE="$TMPDIR/initrd.cpio"
+ $CAT "$image" 2> /dev/null > "$TMPFILE"
+ pre_decompress() {
+ cat "$TMPFILE"
+ }
+ CAT=pre_decompress
+fi
+
+ret=0
+
+if [[ -n $unpack ]]; then
+ unpack_files
+elif ((${#filenames[@]} > 0)); then
+ extract_files
+else
+ # shellcheck disable=SC2046
+ 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: "
+ # shellcheck disable=SC2046
+ $CAT "$image" | cpio --extract --verbose --quiet --to-stdout -- \
+ $(dracutlibdirs build-parameter.txt) 2> /dev/null
+ echo
+ list_modules
+ list_files
+ list_squash_content
+ fi
+fi
+
+exit "$ret"
projects / thirdparty / dracut.git / blobdiff