Re: does mv need a --context=CTX (-Z) option, too?

[Jim Meyering <jim@meyering.net>]

Karl MacMillan <kmacmillan@mentalrootkit.com> wrote:

> On Thu, 2006-08-10 at 17:15 +0200, Jim Meyering wrote:
>> kmacmillan@mentalrootkit.com wrote:
>> > On Thu, 10 Aug 2006, Jim Meyering wrote:
>> >
>> >> It might make sense to add a --context=CTX (-Z) option to mv.  Currently,
>> >> cp, install, mkdir, mknod, mkfifo all have that option, but not mv.
>> >> Most of the time, mv would have no need, since it simply calls rename.
>> >> But when that fails, it reverts to using the very same copying code
>> >> (copy.c) that cp uses.  It is trivial to add this option to mv, with the
>> >> understanding that it'd take effect solely for e.g., cross-device moves.
>> >> I.e., if you want to simulate a cross device move, you'd have to use
>> >> cp -pr and rm -rf, so if it makes sense for cp to have the --context=CTX
>> >> (-Z) option, then it follows that mv must accept it as well.
>> >>
>> >
>> > I think that mv should have that option. Actually, I think that the more
>> > pressing option is --preserve so that users can simulate the rename case
>> > across devices.
>>
>> Why would mv need a new --preserve option?
>> mv already tries to preserve as much as possible when
>> performing any cross-device copy.
>
> I had the impression that mv did not preserve contexts across devices,
> but I guess I was mistaken.

Red Hat's version may not, I don't remember off hand.
The version I'm working on for upstream most definitely does.

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