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
exit 1
fi
+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/$1"
for f in "${!filenames[@]}"; do
[[ $nofileinfo ]] || echo "initramfs:/$f"
[[ $nofileinfo ]] || echo "========================================================================"
- $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout $f 2>/dev/null
+ $CAT "$image" 2>/dev/null | cpio --extract --verbose --quiet --to-stdout "$f" 2>/dev/null
((ret+=$?))
[[ $nofileinfo ]] || echo "========================================================================"
[[ $nofileinfo ]] || echo
echo "========================================================================"
}
+list_squash_content()
+{
+ SQUASH_IMG="squash/root.img"
+ SQUASH_TMPFILE="$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()
{
- $CAT "$image" 2>/dev/null | cpio -id --quiet $verbose
- ((ret+=$?))
+ 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 (( ${#filenames[@]} <= 0 )) && [[ -z "$unpack" ]] && [[ -z "$unpackearly" ]]; then
- echo "Image: $image: $(du -h $image | while read a b || [ -n "$a" ]; do echo $a;done)"
+ 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 $a;done
+ fi
+
echo "========================================================================"
fi
CAT="cat --"
is_early=$(cpio --extract --verbose --quiet --to-stdout -- 'early_cpio' < "$image" 2>/dev/null)
if [[ "$is_early" ]]; then
- if [[ -n "$unpackearly" ]]; then
+ if [[ -n "$unpack" ]]; then
+ # should use --unpackearly for early CPIO
+ :
+ elif [[ -n "$unpackearly" ]]; then
unpack_files
elif (( ${#filenames[@]} > 0 )); then
extract_files
$'\x89'LZO$'\0'*)
CAT="lzop -d -c"
;;
- $'0xFD2FB528'*)
+ $'\x28\xB5\x2F\xFD'*)
CAT="zstd -d -c"
;;
*)
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
echo
list_modules
list_files
+ list_squash_content
fi
fi