Copy issue with sparse files

[BzF]

If I copy sparse file (created with:
dd if=/dev/zero of=01-sparse.img bs=1 count=0 seek=1M
) using mc built-in copy (F5) then it creates file with allocated size (02-sparse-mc4.8.1.img)
If I use cp (cp 01-sparse.img 03-sparse-cp.img) it keeps the size unallocated:

$ ls -al 01-sparse.img 02-sparse-mc4.8.1.img 03-sparse-cp.img
-rw-r--r-- 1 boris boris 1048576 2012-01-17 23:02 01-sparse.img
-rw-r--r-- 1 boris boris 1048576 2012-01-17 23:02 02-sparse-mc4.8.1.img
-rw-r--r-- 1 boris boris 1048576 2012-01-17 23:03 03-sparse-cp.img

but
$ ls -1 -s 01-sparse.img 02-sparse-mc4.8.1.img 03-sparse-cp.img
0 01-sparse.img
1024 02-sparse-mc4.8.1.img
0 03-sparse-cp.img

[god12]

Note: the enhancement would be not only space savings but significant speed-up as well.

[god12]

On a related note - is it possible to write an mc plugin which would replace built-in implementation of file-copy with something which actually works with sparse files, like calling external cp command for example?

[ag]

I've fixed it. But I haven't yet found the time (and fun) to cleanup the patch, thus I can't publish it yet.

[andrew_b]

Ticket #3849 has been marked as a duplicate of this ticket.

[TerraNova]

Are there any updates for copy/move sparse file handling? I ran into this tonight moving around some qcow2 images.