python 从文件中提取文件时出错

Question

Python代码：

import tarfile,os
import sys
def extract_system_report (tar_file_path):
    extract_path = ""
    tar = tarfile.open(sys.argv[1])
    for member in tar.getmembers():
        print ("member_name is: ")
        print (member.name)
        tar.extract(member.name, "./crachinfo/")
extract_system_report(sys.argv[1])

提取文件时出现以下错误：

>> python tar_read.py /nobackup/deepakhe/POLARIS_POJECT_09102019/hackathon_2021/a.tar.gz 

member_name is: 
/bootflash/.prst_sync/reload_info

Traceback (most recent call last):
  File "tar_read.py", line 38, in <module>
    extract_system_report(sys.argv[1])
  File "tar_read.py", line 10, in extract_system_report
    tar.extract(member.name, "./crachinfo/")
  File "/auto/pysw/cel8x/python64/3.6.10/lib/python3.6/tarfile.py", line 2052, in extract
    numeric_owner=numeric_owner)
  File "/auto/pysw/cel8x/python64/3.6.10/lib/python3.6/tarfile.py", line 2114, in _extract_member
    os.makedirs(upperdirs)
  File "/auto/pysw/cel8x/python64/3.6.10/lib/python3.6/os.py", line 210, in makedirs
    makedirs(head, mode, exist_ok)
  File "/auto/pysw/cel8x/python64/3.6.10/lib/python3.6/os.py", line 220, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/bootflash'

我正在指定要提取的文件夹，但它似乎仍在尝试在根目录中创建一个文件夹。这种行为是预期的吗？我可以在文件管理器中很好地提取这个 tar 文件。在 python 中有没有办法处理这个问题？

Answer 1

I am specifying the folder to extract but still it seems trying to create a folder in the root directory. is this behavior expected?

是的。提供的路径只是一个“当前目录”，而不是“监狱”。文档甚至特别警告它：

It is possible that files are created outside of path, e.g. members that have absolute filenames starting with "/" or filenames with two dots "..".

I can extract this tar file fine in file manager. is there a way to handle this in python?

使用extractfile获取归档文件内容的伪文件句柄，然后将其复制到任何你想要的地方。

python 从文件中提取文件时出错

python giving error in extracting a file from the file

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tar