Re: By default nmap requires an internet connection

On 5/24/25 12:04 AM, Xi Ruoyao ([email protected] via blfs-dev Mailing List) wrote:
> On Sat, 2025-05-24 at 12:15 +0800, Xi Ruoyao wrote:
>> On Fri, 2025-05-23 at 15:21 -0400, Joe Locash wrote:
>>> On 5/14/25 12:21 AM, Xi Ruoyao ([email protected] via blfs-dev Mailing
>>> List) wrote:
>>>> On Wed, 2025-05-14 at 12:07 +0800, Xi Ruoyao wrote:
>>>>> On Tue, 2025-05-13 at 18:13 -0500, Bruce Dubbs wrote:
>>>>>> On 5/13/25 5:59 PM, Joe Locash ([email protected] via blfs-dev Mailing List) wrote:
>>>>>>> On 5/13/25 6:53 PM, Bruce Dubbs ([email protected] via blfs-dev Mailing List) wrote:
>>>>>>>> On 5/13/25 5:34 PM, Joe Locash ([email protected] via blfs-dev Mailing List) wrote:
>>>>>>>>> On 5/13/25 5:51 PM, Bruce Dubbs ([email protected] via blfs-dev Mailing List)
>>>>>>>>> wrote:
>>>>>>>>>> I looked at my build log and didn't see where it is using an internet connection.
>>>>>>>>>> Can you show where that is happening?
>>>>>>>>>
>>>>>>>>> /usr/bin/python3 -m build zenmap/
>>>>>>>>> * Creating isolated environment: venv+pip...
>>>>>>>>> * Installing packages in isolated environment:
>>>>>>>>>      - setuptools
>>>>>>>>>    > /usr/bin/python3 -m pip --python /tmp/build-env-fr8do3me/bin/python install
>>>>>>>>>      --use-pep517 --no-warn-script-location --no-compile -r /tmp/build-reqs-
>>>>>>>>>      uok0756y.txt
>>>>>>>>> < WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None,
>>>>>>>>>      status=None)) after connection broken by
>>>>>>>>> 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object
>>>>>>>>>      at 0x7f83a5b830e0>: Failed to establish a new connection: [Errno -3]
>>>>>>>>>      Temporary failure in name resolution')': /simple/setuptools/
>>>>>>>>>
>>>>>>>>> ....
>>>>>>>>>
>>>>>>>>> < ERROR: Could not find a version that satisfies the requirement setuptools
>>>>>>>>>      (from versions: none)
>>>>>>>>> < ERROR: No matching distribution found for setuptools
>>>>>>>> Interesting.  I have:
>>>>>>>>
>>>>>>>> /usr/bin/python3 -m build zenmap/
>>>>>>>> /usr/bin/python3 -m build ndiff/
>>>>>>>> * Creating isolated environment: venv+pip...
>>>>>>>> * Installing packages in isolated environment:
>>>>>>>> * Creating isolated environment: venv+pip...
>>>>>>>> * Installing packages in isolated environment:
>>>>>>>> Compiling libnsock
>>>>>>>> ...
>>>>>>>>
>>>>>>>> We are installing setuptools in LFS.  Did you not have that installed?
>>>>> It cannot use the setuptools in LFS because they are not creating venv
>>>>> with --system-site-packages (like what we are doing for various Python
>>>>> modules).  If you purge ~/.cache/pip and disconnect the network (or use
>>>>> unshare -r -n to create an environment with no network) you can
>>>>> reproduce the issue.
>>>> Fixed with
>>>> https://lists.linuxfromscratch.org/sympa/arc/blfs-book/2025-05/msg00293.html.
>>>>
>>>>
>>> sed 's/-m pip install/& --no-build-isolation/' -i Makefile.in
>>>
>>> is also needed for the install side of it.
>>
>> This is just strange.  We don't have --no-build-isolation for pip3
>> install of anything in
>> https://www.linuxfromscratch.org/blfs/view/systemd/general/python-modules.html.
>>
>> Thus I guess adding --no-build-isolation here is just covering up the
>> real issue.  I'll investigate later.
> 
> The real issue is "make install" rebuilds the python modules instead of
> installing the wheels produced by "make."  This is just stupid IMO.
> 
> I'll do something like
> 
> sed -r '/pip install/s#(ZENMAP|NDIFF)DIR\)/#&dist/*.whl#' \
>      -i Makefile.in
> 
> to correct it.

I like using the -r in the sed.  Good example.

   -- Bruce

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