Re: [PATCH] md5sum: add an option to change directory

[Assaf Gordon]

Hello,

On 2020-05-30 3:59 p.m., Bertrand Jacquin wrote:
[...]
> This definitely make sense
>
> > >    $ sha256sum -C /etc fstab
> > >    b5d6c0e5e6bc419b134478ad7b3e7c8cc628049876a7772cea469e81e4b0e0e5
> > > fstab
> >
> > The net effect is that just the output has changed to omit the path
> > name.
> >
> > Maybe this wants to be a --strip or -p option like with diff or patch,
> > or --basename-only to strip a variable number of components, leaving
> > only
> > the last.
>
> This seems to be a better approach indeed. I just sent a new patch using
> base_name from coreutils itself.

The GNU Datamash program can do basename and dirname on a column of a 
text file, producing the wanted results (and more):

 $ md5sum /etc/fstab world.txt | datamash -W --full basename 2 dirname 2
 b50f98cdf2d6e26a99040ad5386b0884  /etc/fstab  fstab      /etc
 b1946ac92492d2347c6235b4d2611184  world.txt   world.txt  .

And this will work on any input without the need to duplicate
functionality in multiple programs.



-assaf