def rmdirRecursiveWindows(dir):
"""Windows-specific version of rmdirRecursive that handles
path lengths longer than MAX_PATH.
"""
dir = os.path.realpath(dir)
# Make sure directory is writable
SetFileAttributesW('\\\\?\\' + dir, FILE_ATTRIBUTE_NORMAL)
for ffrec in FindFiles('\\\\?\\' + dir + '\\*.*'):
file_attr = ffrec[0]
name = ffrec[8]
if name == '.' or name == '..':
continue
full_name = os.path.join(dir, name)
if file_attr & FILE_ATTRIBUTE_DIRECTORY:
rmdirRecursiveWindows(full_name)
else:
SetFileAttributesW('\\\\?\\' + full_name, FILE_ATTRIBUTE_NORMAL)
DeleteFile('\\\\?\\' + full_name)
RemoveDirectory('\\\\?\\' + dir)
def file_wipe(file_name):
# add \\?\ if it does not exist to support Unicode and long paths
file_name = extended_path(file_name)
check_os()
win_version, _ = determine_win_version()
volume = volume_from_file(file_name)
volume_info = get_volume_information(volume)
cluster_size = (volume_info.sectors_per_cluster *
volume_info.bytes_per_sector)
file_handle = open_file(file_name)
file_size, is_special = get_file_basic_info(file_name, file_handle)
orig_extents = get_extents(file_handle)
if is_special:
bridged_extents = [
x for x in logical_ranges_to_extents(
get_extents(file_handle, False), True)
]
CloseHandle(file_handle)
#logger.debug('Original extents: {}'.format(orig_extents))
volume_handle = obtain_readwrite(volume)
attrs = GetFileAttributesW(file_name)
if attrs & FILE_ATTRIBUTE_READONLY:
# Remove read-only attribute to avoid "access denied" in CreateFileW().
SetFileAttributesW(file_name, attrs & ~FILE_ATTRIBUTE_READONLY)
file_handle = open_file(file_name, GENERIC_READ | GENERIC_WRITE)
if not is_special:
# Direct overwrite when it's a regular file.
#logger.info("Attempting direct file wipe.")
wipe_file_direct(file_handle, orig_extents, cluster_size, file_size)
new_extents = get_extents(file_handle)
CloseHandle(file_handle)
#logger.debug('New extents: {}'.format(new_extents))
if orig_extents == new_extents:
clean_up(None, volume_handle, None)
return
# Expectation was that extents should be identical and file is wiped.
# If OS didn't give that to us, continue below and use defrag wipe.
# Any extent within new_extents has now been wiped by above.
# It can be subtracted from the orig_extents list, and now we will
# just clean up anything not yet overwritten.
orig_extents = extents_a_minus_b(orig_extents, new_extents)
else:
# File needs special treatment. We can't just do a basic overwrite.
# First we will truncate it. Then chase down the freed clusters to
# wipe them, now that they are no longer part of the file.
truncate_file(file_handle)
CloseHandle(file_handle)
# Poll to confirm that our clusters were freed.
poll_clusters_freed(volume_handle, volume_info.total_clusters,
orig_extents)
# Chase down all the freed clusters we can, and wipe them.
#logger.debug("Attempting defrag file wipe.")
# Put the temp file in the same folder as the target wipe file.
# Should be able to write this path if user can write the wipe file.
tmp_file_path = os.path.dirname(file_name) + os.sep + tmp_file_name
if is_special:
orig_extents = choose_if_bridged(volume_handle,
volume_info.total_clusters,
orig_extents, bridged_extents)
for lcn_start, lcn_end in orig_extents:
result = wipe_extent_by_defrag(volume_handle, lcn_start, lcn_end,
cluster_size,
volume_info.total_clusters,
tmp_file_path)
# Clean up.
clean_up(None, volume_handle, tmp_file_path)
return