1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
# Utilities for python-based QEMU tests
#
# Copyright 2024 Red Hat, Inc.
#
# Authors:
# Thomas Huth <thuth@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import gzip
import lzma
import os
import shutil
import subprocess
import tarfile
"""
Round up to next power of 2
"""
def pow2ceil(x):
return 1 if x == 0 else 2**(x - 1).bit_length()
def file_truncate(path, size):
if size != os.path.getsize(path):
with open(path, 'ab+') as fd:
fd.truncate(size)
"""
Expand file size to next power of 2
"""
def image_pow2ceil_expand(path):
size = os.path.getsize(path)
size_aligned = pow2ceil(size)
if size != size_aligned:
with open(path, 'ab+') as fd:
fd.truncate(size_aligned)
def archive_extract(archive, dest_dir, member=None):
with tarfile.open(archive) as tf:
if hasattr(tarfile, 'data_filter'):
tf.extraction_filter = getattr(tarfile, 'data_filter',
(lambda member, path: member))
if member:
tf.extract(member=member, path=dest_dir)
else:
tf.extractall(path=dest_dir)
def gzip_uncompress(gz_path, output_path):
if os.path.exists(output_path):
return
with gzip.open(gz_path, 'rb') as gz_in:
try:
with open(output_path, 'wb') as raw_out:
shutil.copyfileobj(gz_in, raw_out)
except:
os.remove(output_path)
raise
def lzma_uncompress(xz_path, output_path):
if os.path.exists(output_path):
return
with lzma.open(xz_path, 'rb') as lzma_in:
try:
with open(output_path, 'wb') as raw_out:
shutil.copyfileobj(lzma_in, raw_out)
except:
os.remove(output_path)
raise
def cpio_extract(cpio_handle, output_path):
cwd = os.getcwd()
os.chdir(output_path)
subprocess.run(['cpio', '-i'],
input=cpio_handle.read(),
stderr=subprocess.DEVNULL)
os.chdir(cwd)
|
