/usr/lib/python3/dist-packages/libarchive/read.py is in python3-libarchive-c 2.1-3.1.
This file is owned by root:root, with mode 0o644.
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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 78 79 80 81 82 83 | # This file is part of a program licensed under the terms of the GNU Lesser
# General Public License version 2 (or at your option any later version)
# as published by the Free Software Foundation: http://www.gnu.org/licenses/
from __future__ import division, print_function, unicode_literals
from contextlib import contextmanager
from ctypes import cast, c_void_p
from os import fstat, stat
from . import ffi
from .ffi import ARCHIVE_EOF
from .entry import ArchiveEntry, new_archive_entry
class ArchiveRead(object):
def __init__(self, archive_p):
self._pointer = archive_p
def __iter__(self):
"""Iterates through an archive's entries.
"""
archive_p = self._pointer
read_next_header2 = ffi.read_next_header2
with new_archive_entry() as entry_p:
entry = ArchiveEntry(archive_p, entry_p)
while 1:
r = read_next_header2(archive_p, entry_p)
if r == ARCHIVE_EOF:
return
yield entry
@contextmanager
def new_archive_read(format_name='all', filter_name='all'):
"""Creates an archive struct suitable for reading from an archive.
Returns a pointer if successful. Raises ArchiveError on error.
"""
archive_p = ffi.read_new()
getattr(ffi, 'read_support_filter_'+filter_name)(archive_p)
getattr(ffi, 'read_support_format_'+format_name)(archive_p)
try:
yield archive_p
finally:
ffi.read_free(archive_p)
@contextmanager
def fd_reader(fd, format_name='all', filter_name='all', block_size=4096):
"""Read an archive from a file descriptor.
"""
with new_archive_read(format_name, filter_name) as archive_p:
try:
block_size = fstat(fd).st_blksize
except (OSError, AttributeError): # pragma: no cover
pass
ffi.read_open_fd(archive_p, fd, block_size)
yield ArchiveRead(archive_p)
@contextmanager
def file_reader(path, format_name='all', filter_name='all', block_size=4096):
"""Read an archive from a file.
"""
with new_archive_read(format_name, filter_name) as archive_p:
try:
block_size = stat(path).st_blksize
except (OSError, AttributeError): # pragma: no cover
pass
ffi.read_open_filename_w(archive_p, path, block_size)
yield ArchiveRead(archive_p)
@contextmanager
def memory_reader(buf, format_name='all', filter_name='all'):
"""Read an archive from memory.
"""
with new_archive_read(format_name, filter_name) as archive_p:
ffi.read_open_memory(archive_p, cast(buf, c_void_p), len(buf))
yield ArchiveRead(archive_p)
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