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from __future__ import absolute_import, print_function
import errno, glob, stat, subprocess
import os, sys
import pytest
from wvpytest import *
from bup import git, metadata
from bup import vfs
from bup.compat import fsencode
from bup.helpers import clear_errors, detect_fakeroot, is_superuser, resolve_parent
from bup.repo import LocalRepo
from bup.xstat import utime, lutime
import bup.helpers as helpers
import buptest
lib_t_dir = os.path.dirname(fsencode(__file__))
top_dir = os.path.realpath(os.path.join(lib_t_dir, b'..', b'..'))
bup_path = top_dir + b'/bup'
def ex(*args, **kwargs):
return buptest.ex(args, **kwargs)
def setup_testfs():
# Try to set up testfs with user_xattr, etc.
assert(sys.platform.startswith('linux'))
subprocess.call([b'umount', b'testfs'])
ex(b'dd', b'if=/dev/zero', b'of=testfs.img', b'bs=1M', b'count=32')
ex(b'mke2fs', b'-F', b'-j', b'-m', b'0', b'testfs.img')
ex(b'rm', b'-rf', b'testfs')
os.mkdir(b'testfs')
exr = ex(b'mount', b'-o', b'loop,acl,user_xattr', b'testfs.img', b'testfs',
check=False)
if exr.rc != 0:
return False
# Hide, so that tests can't create risks.
os.chown(b'testfs', 0, 0)
os.chmod(b'testfs', 0o700)
return True
def cleanup_testfs():
subprocess.call([b'umount', b'testfs'])
helpers.unlink(b'testfs.img')
def test_clean_up_archive_path():
cleanup = metadata._clean_up_path_for_archive
WVPASSEQ(cleanup(b'foo'), b'foo')
WVPASSEQ(cleanup(b'/foo'), b'foo')
WVPASSEQ(cleanup(b'///foo'), b'foo')
WVPASSEQ(cleanup(b'/foo/bar'), b'foo/bar')
WVPASSEQ(cleanup(b'foo/./bar'), b'foo/bar')
WVPASSEQ(cleanup(b'/foo/./bar'), b'foo/bar')
WVPASSEQ(cleanup(b'/foo/./bar/././baz'), b'foo/bar/baz')
WVPASSEQ(cleanup(b'/foo/./bar///././baz'), b'foo/bar/baz')
WVPASSEQ(cleanup(b'//./foo/./bar///././baz/.///'), b'foo/bar/baz/')
WVPASSEQ(cleanup(b'./foo/./.bar'), b'foo/.bar')
WVPASSEQ(cleanup(b'./foo/.'), b'foo')
WVPASSEQ(cleanup(b'./foo/..'), b'.')
WVPASSEQ(cleanup(b'//./..//.../..//.'), b'.')
WVPASSEQ(cleanup(b'//./..//..././/.'), b'...')
WVPASSEQ(cleanup(b'/////.'), b'.')
WVPASSEQ(cleanup(b'/../'), b'.')
WVPASSEQ(cleanup(b''), b'.')
def test_risky_path():
risky = metadata._risky_path
WVPASS(risky(b'/foo'))
WVPASS(risky(b'///foo'))
WVPASS(risky(b'/../foo'))
WVPASS(risky(b'../foo'))
WVPASS(risky(b'foo/..'))
WVPASS(risky(b'foo/../'))
WVPASS(risky(b'foo/../bar'))
WVFAIL(risky(b'foo'))
WVFAIL(risky(b'foo/'))
WVFAIL(risky(b'foo///'))
WVFAIL(risky(b'./foo'))
WVFAIL(risky(b'foo/.'))
WVFAIL(risky(b'./foo/.'))
WVFAIL(risky(b'foo/bar'))
WVFAIL(risky(b'foo/./bar'))
def test_clean_up_extract_path():
cleanup = metadata._clean_up_extract_path
WVPASSEQ(cleanup(b'/foo'), b'foo')
WVPASSEQ(cleanup(b'///foo'), b'foo')
WVFAIL(cleanup(b'/../foo'))
WVFAIL(cleanup(b'../foo'))
WVFAIL(cleanup(b'foo/..'))
WVFAIL(cleanup(b'foo/../'))
WVFAIL(cleanup(b'foo/../bar'))
WVPASSEQ(cleanup(b'foo'), b'foo')
WVPASSEQ(cleanup(b'foo/'), b'foo/')
WVPASSEQ(cleanup(b'foo///'), b'foo///')
WVPASSEQ(cleanup(b'./foo'), b'./foo')
WVPASSEQ(cleanup(b'foo/.'), b'foo/.')
WVPASSEQ(cleanup(b'./foo/.'), b'./foo/.')
WVPASSEQ(cleanup(b'foo/bar'), b'foo/bar')
WVPASSEQ(cleanup(b'foo/./bar'), b'foo/./bar')
WVPASSEQ(cleanup(b'/'), b'.')
WVPASSEQ(cleanup(b'./'), b'./')
WVPASSEQ(cleanup(b'///foo/bar'), b'foo/bar')
WVPASSEQ(cleanup(b'///foo/bar'), b'foo/bar')
def test_metadata_method(tmpdir):
bup_dir = tmpdir + b'/bup'
data_path = tmpdir + b'/foo'
os.mkdir(data_path)
ex(b'touch', data_path + b'/file')
ex(b'ln', b'-s', b'file', data_path + b'/symlink')
test_time1 = 13 * 1000000000
test_time2 = 42 * 1000000000
utime(data_path + b'/file', (0, test_time1))
lutime(data_path + b'/symlink', (0, 0))
utime(data_path, (0, test_time2))
ex(bup_path, b'-d', bup_dir, b'init')
ex(bup_path, b'-d', bup_dir, b'index', b'-v', data_path)
ex(bup_path, b'-d', bup_dir, b'save', b'-tvvn', b'test', data_path)
git.check_repo_or_die(bup_dir)
with LocalRepo() as repo:
resolved = vfs.resolve(repo,
b'/test/latest' + resolve_parent(data_path),
follow=False)
leaf_name, leaf_item = resolved[-1]
m = leaf_item.meta
WVPASS(m.mtime == test_time2)
WVPASS(leaf_name == b'foo')
contents = tuple(vfs.contents(repo, leaf_item))
WVPASS(len(contents) == 3)
WVPASSEQ(frozenset(name for name, item in contents),
frozenset((b'.', b'file', b'symlink')))
for name, item in contents:
if name == b'file':
m = item.meta
WVPASS(m.mtime == test_time1)
elif name == b'symlink':
m = item.meta
WVPASSEQ(m.symlink_target, b'file')
WVPASSEQ(m.size, 4)
WVPASSEQ(m.mtime, 0)
def _first_err():
if helpers.saved_errors:
return str(helpers.saved_errors[0])
return ''
def test_from_path_error(tmpdir):
if is_superuser() or detect_fakeroot():
return
path = tmpdir + b'/foo'
os.mkdir(path)
m = metadata.from_path(path, archive_path=path, save_symlinks=True)
WVPASSEQ(m.path, path)
os.chmod(path, 0o000)
metadata.from_path(path, archive_path=path, save_symlinks=True)
if metadata.get_linux_file_attr:
print('saved_errors:', helpers.saved_errors, file=sys.stderr)
WVPASS(len(helpers.saved_errors) == 1)
errmsg = _first_err()
WVPASS(errmsg.startswith('read Linux attr'))
clear_errors()
def _linux_attr_supported(path):
# Expects path to denote a regular file or a directory.
if not metadata.get_linux_file_attr:
return False
try:
metadata.get_linux_file_attr(path)
except OSError as e:
if e.errno in (errno.ENOTTY, errno.ENOSYS, errno.EOPNOTSUPP):
return False
else:
raise
return True
def test_apply_to_path_restricted_access(tmpdir):
if is_superuser() or detect_fakeroot():
return
if sys.platform.startswith('cygwin'):
return # chmod 000 isn't effective.
try:
parent = tmpdir + b'/foo'
path = parent + b'/bar'
os.mkdir(parent)
os.mkdir(path)
clear_errors()
if metadata.xattr:
try:
metadata.xattr.set(path, b'user.buptest', b'bup')
except:
print("failed to set test xattr")
# ignore any failures here - maybe FS cannot do it
pass
m = metadata.from_path(path, archive_path=path, save_symlinks=True)
WVPASSEQ(m.path, path)
os.chmod(parent, 0o000)
m.apply_to_path(path)
print(b'saved_errors:', helpers.saved_errors, file=sys.stderr)
expected_errors = ['utime: ']
if m.linux_attr and _linux_attr_supported(tmpdir):
expected_errors.append('Linux chattr: ')
if metadata.xattr and m.linux_xattr:
expected_errors.append("xattr.set ")
WVPASS(len(helpers.saved_errors) == len(expected_errors))
for i in range(len(expected_errors)):
assert str(helpers.saved_errors[i]).startswith(expected_errors[i])
finally:
clear_errors()
def test_restore_over_existing_target(tmpdir):
path = tmpdir + b'/foo'
os.mkdir(path)
dir_m = metadata.from_path(path, archive_path=path, save_symlinks=True)
os.rmdir(path)
open(path, 'w').close()
file_m = metadata.from_path(path, archive_path=path, save_symlinks=True)
# Restore dir over file.
WVPASSEQ(dir_m.create_path(path, create_symlinks=True), None)
WVPASS(stat.S_ISDIR(os.stat(path).st_mode))
# Restore dir over dir.
WVPASSEQ(dir_m.create_path(path, create_symlinks=True), None)
WVPASS(stat.S_ISDIR(os.stat(path).st_mode))
# Restore file over dir.
WVPASSEQ(file_m.create_path(path, create_symlinks=True), None)
WVPASS(stat.S_ISREG(os.stat(path).st_mode))
# Restore file over file.
WVPASSEQ(file_m.create_path(path, create_symlinks=True), None)
WVPASS(stat.S_ISREG(os.stat(path).st_mode))
# Restore file over non-empty dir.
os.remove(path)
os.mkdir(path)
open(path + b'/bar', 'w').close()
WVEXCEPT(Exception, file_m.create_path, path, create_symlinks=True)
# Restore dir over non-empty dir.
os.remove(path + b'/bar')
os.mkdir(path + b'/bar')
WVEXCEPT(Exception, dir_m.create_path, path, create_symlinks=True)
from bup.metadata import xattr
if xattr:
def remove_selinux(attrs):
return list(filter(lambda i: not i in (b'security.selinux', ),
attrs))
def test_handling_of_incorrect_existing_linux_xattrs():
if not is_superuser() or detect_fakeroot():
pytest.skip('skipping test -- not superuser')
return
if not setup_testfs():
pytest.skip('unable to set up test fs; skipping dependent tests')
return
for f in glob.glob(b'testfs/*'):
ex(b'rm', b'-rf', f)
path = b'testfs/foo'
open(path, 'w').close()
xattr.set(path, b'foo', b'bar', namespace=xattr.NS_USER)
m = metadata.from_path(path, archive_path=path, save_symlinks=True)
xattr.set(path, b'baz', b'bax', namespace=xattr.NS_USER)
m.apply_to_path(path, restore_numeric_ids=False)
WVPASSEQ(remove_selinux(xattr.list(path)), [b'user.foo'])
WVPASSEQ(xattr.get(path, b'user.foo'), b'bar')
xattr.set(path, b'foo', b'baz', namespace=xattr.NS_USER)
m.apply_to_path(path, restore_numeric_ids=False)
WVPASSEQ(remove_selinux(xattr.list(path)), [b'user.foo'])
WVPASSEQ(xattr.get(path, b'user.foo'), b'bar')
xattr.remove(path, b'foo', namespace=xattr.NS_USER)
m.apply_to_path(path, restore_numeric_ids=False)
WVPASSEQ(remove_selinux(xattr.list(path)), [b'user.foo'])
WVPASSEQ(xattr.get(path, b'user.foo'), b'bar')
cleanup_testfs()
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