3
3
# Initramfs unpacker - unpacks initramfs images into /tmp
5
# Copyright © 2013-2019 Teddy Hogeborn
6
# Copyright © 2013-2019 Björn Påhlsson
5
# Copyright © 2013 Teddy Hogeborn
6
# Copyright © 2013 Björn Påhlsson
8
8
# This file is part of Mandos.
43
43
if $cpio --quiet --list --file="$imgfile" >/dev/null 2>&1; then
44
44
# Number of bytes to skip to get to the compressed archive
45
45
skip=$(($(LANG=C $cpio --io-size=1 --list --file="$imgfile" 2>&1 \
47
--expression='s/^\([0-9]\+\) blocks$/\1/p')+8))
48
if [ -x /usr/lib/dracut/skipcpio ]; then
49
catimg="/usr/lib/dracut/skipcpio $imgfile"
51
catimg="dd if=$imgfile bs=$skip skip=1 status=noxfer"
46
| sed --quiet --expression='s/^\([0-9]\+\) blocks$/\1/p')+8))
47
catimg="dd if=$imgfile bs=$skip skip=1 status=noxfer"
54
echo "No microcode detected"
55
49
catimg="cat -- $imgfile"
58
# Determine the compression method
59
if { $catimg 2>/dev/null | zcat --test >/dev/null 2>&1;
60
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
62
elif { $catimg 2>/dev/null | bzip2 --test >/dev/null 2>&1;
63
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
64
decomp="bzip2 --stdout --decompress"
65
elif { $catimg 2>/dev/null | lzop --test >/dev/null 2>&1;
66
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
67
decomp="lzop --stdout --decompress"
68
elif { $catimg 2>/dev/null | zstd --test >/dev/null 2>&1;
69
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
70
decomp="zstdcat --stdout --decompress"
73
echo "Could not determine compression of ${imgfile}; trying to skip ${skip} bytes" >&2
74
catimg="dd if=$imgfile bs=$skip skip=1 status=noxfer"
80
*skipcpio*) echo "Microcode detected, skipping";;
81
*) echo "Microcode detected, skipping ${skip} bytes";;
51
# Determine the compression method
52
if { $catimg 2>/dev/null | zcat --test >/dev/null 2>&1;
53
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
55
elif { $catimg 2>/dev/null | bzip2 --test >/dev/null 2>&1;
56
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
57
decomp="bzip2 --stdout --decompress"
58
elif { $catimg 2>/dev/null | lzop --test >/dev/null 2>&1;
59
[ ${PIPESTATUS[-1]} -eq 0 ]; }; then
60
decomp="lzop --stdout --decompress"
62
echo "Error: Could not determine type of $imgfile" >&2
83
65
$catimg 2>/dev/null | $decomp | ( cd -- "$imgdir" && $cpio --quiet )
84
66
if [ ${PIPESTATUS[-1]} -eq 0 ]; then
85
67
echo "$imgfile unpacked into $imgdir"