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Copy a file like unix cp -a --reflink

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  Copy a file like unix cp -a --reflink Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2013-12-18 18:37 +0000
    Re: Copy a file like unix cp -a --reflink Joel Goldstick <joel.goldstick@gmail.com> - 2013-12-18 14:19 -0500
    Re: Copy a file like unix cp -a --reflink Jerry Hill <malaclypse2@gmail.com> - 2013-12-18 14:43 -0500
    Re: Copy a file like unix cp -a --reflink Anssi Saari <as@sci.fi> - 2013-12-20 21:17 +0200

#62331 — Copy a file like unix cp -a --reflink

Hi!

Is there a way to copy a file the same as Unix command:

cp -a --reflink src dest

without invoking a shell command?

Thanks

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#62332

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On Wed, Dec 18, 2013 at 1:37 PM, Paulo da Silva <
p_s_d_a_s_i_l_v_a@netcabo.pt> wrote:

> Hi!
>
> Is there a way to copy a file the same as Unix command:
>
> cp -a --reflink src dest
>
> without invoking a shell command?
>
> Thanks
> --
> https://mail.python.org/mailman/listinfo/python-list
>

You want to make a symlink to a file ini python.  I think this might get
you there:

http://stackoverflow.com/questions/4847615/copying-a-symbolic-link-in-python


-- 
Joel Goldstick
http://joelgoldstick.com

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#62333

On Wed, Dec 18, 2013 at 1:37 PM, Paulo da Silva
<p_s_d_a_s_i_l_v_a@netcabo.pt> wrote:
> Hi!
>
> Is there a way to copy a file the same as Unix command:
>
> cp -a --reflink src dest
>
> without invoking a shell command?

I started to dig through the cp man page to see what that did, then
gave up when each option expanded out to several more.  i.e., "-a,
--archive same as -dR --preserve=all" leads to looking up -d -R and
--preserve, etc.

To me, it's just not worth it to spend more time researching your
question than you spent writing the email asking it. If you don't get
the answers you're looking for, you might try asking again, specifying
the exact behavior you'd like to achieve.

PS: That isn't really meant as any kind of complaint about your
question.  It's consise, easy to read, and gets right to the point.
It just assumes a lot of background knowledge.  If someone else
happens to already know all of that background, they may be able to
help right off.  If not, they may be interested enough to do the
research to figure it all out and then help. You just may be able to
prompt more people to help by cutting down on the amount of work it
would take them to do so.

-- 
Jerry

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#62453

Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> writes:

> Hi!
>
> Is there a way to copy a file the same as Unix command:
>
> cp -a --reflink src dest
>
> without invoking a shell command?

I vaguely remember this was asked and answered some time ago and the
answer was no, even just for -a.  In fact, the python shutil module
documentation starts with a warning to that effect. The --reflink stuff
would be another thing altogether.

More accurately, currently the only way would be to duplicate this
functionality of cp in python.

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