Hardlink sub-directories and files

Thomas Jollans t at jollybox.de
Wed Aug 3 23:54:03 CEST 2011


On 03/08/11 23:25, Dan Stromberg wrote:
> 
> On Wed, Aug 3, 2011 at 11:49 AM, Thomas Jollans <t at jollybox.de
> <mailto:t at jollybox.de>> wrote:
> 
> 
>     > Interesting.  Of course, it's probably readily available to you.  What
>     > *ix are you seeing that doesn't include cpio by default?
> 
>     Arch Linux - the base install is quite minimal. I just discovered that I
>     have a program called bsdcpio which is used by mkinitcpio (and possibly
>     other system scripts); no need for the GNU cpio. Curious.
> 
> 
> I guess that makes some sense.  If you want to really strip down an
> install, removing cpio is a good candidate since it duplicates what's in
> tar, and tar is more popular - especially for interactive use.
> 
>>     Which implementations of cp don't implement -R and -l?
>>
>>
>> Probably most of them, except GNU and newer BSD.
> 
>     Okay. While GNU libc manuals usually document how portable functions are
>     in detail, that's not true for the GNU coreutils manuals.
> 
> 
> I don't think cpio is in GNU coreutils.  Also, I think GNU cpio is a
> reimplementation, not the original.

Indeed. But cp is in the coreutils, and that was what we were talking about.

As for GNU cpio, that's simply what /usr/bin/cpio, if present, is
expected to be on a GNU/Linux system.

> 
> cpio's been around since PWB/Unix, which sits between 6th Edition Unix
> and 7th Edition.  It should be in just about everything, unless a
> vendor/distributor got pretty zealous about cutting duplicate utilities.
> 





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