Re: By default nmap requires an internet connection

Am 24.05.25 um 07:59 schrieb Bruce Dubbs ([email protected] via
blfs-dev Mailing List):
> 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.
I suggest to use "-E" instead.  "-E" is easier to associate with
"extended" than "-r" and thus easier to remember.  It's also used with
the same meaning in grep where "-r" means "recursive".  Or use the long
form.

Diversity is all very fine but I plead for consistency throughout the
books whenever possible.  Building LFS/BLFS is hard enough.

Rainer

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