#!/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.
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
}
+
+[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
+
sorted=0
+modules=0
+unset verbose
declare -A filenames
unset POSIXLY_CORRECT
TEMP=$(getopt \
- -o "shf:k:" \
+ -o "vshmf:k:" \
--long kver: \
--long file: \
+ --long mod \
--long help \
--long size \
+ --long unpack \
+ --long unpackearly \
+ --long verbose \
-- "$@")
if (( $? != 0 )); then
while (($# > 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;;
- --) shift;break;;
- *) usage; exit 1;;
+ -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
exit 1
fi
-CAT=zcat
-FILE_T=$(file --dereference "$image")
+TMPDIR="$(mktemp -d -t lsinitrd.XXXXXX)"
+trap "rm -rf '$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 "========================================================================"
+ $CAT "$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+=$?))
+ echo "========================================================================"
+}
+
+list_squash_content()
+{
+ SQUASH_IMG="squash/root.img"
+ SQUASH_TMPFILE="$TMPDIR/initrd.root.sqsh"
-if echo "test"|xz|xz -dc --single-stream >/dev/null 2>&1; then
- XZ_SINGLE_STREAM="--single-stream"
+ $CAT "$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
+}
+
+read -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 [[ "$FILE_T" =~ :\ gzip\ compressed\ data ]]; then
- CAT=zcat
-elif [[ "$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"
+if (( ${#filenames[@]} <= 0 )) && [[ -z "$unpack" ]] && [[ -z "$unpackearly" ]]; then
+ if [ -n $uefi ]; then
+ echo -n "initrd in UEFI: $uefi: "
+ du -h $image | while read a b || [ -n "$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 $image | while read a b || [ -n "$a" ]; do echo $a;done
+ fi
+
+ echo "========================================================================"
fi
-if (( ${#filenames[@]} > 0 )); then
- $CAT $image | cpio --extract --verbose --quiet --to-stdout ${!filenames[@]} 2>/dev/null
- exit $?
+read -N 6 bin < "$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
+
+skipcpio()
+{
+ $SKIP "$@" | $ORIG_CAT
+}
-echo "$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
+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
- $CAT "$image" | cpio --extract --verbose --quiet --list | sort -k9
+ 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
projects / thirdparty / dracut.git / blobdiff