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Re: sha256sum --text generating blank spaces and hyphens?

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On Wed 26 Apr 2023 at 14:33:03 (+0000), Albretch Mueller wrote:
> On 4/26/23, tomas@tuxteam.de <tomas@tuxteam.de> wrote:
> >>  a) encode the string name as base64
> >>  b) calculate the sha256sum of §a
> >
> > Why the detour over base64?
> 
>  because I would like to include the three strings in the file descriptor:
>  a) the crazy long name
>  b) its base64 representation

The base64 command wraps the output, in case you didn't notice.

>  c) §b's sha256sum representation which is the one used for the file
> name and the log of the download.

I guess you need the expense of sha256 rather than md5 as you're
downloading the entire web?

>  I would like to make this scheme "fool (and fail) proof" as they say.
> There is no way in earth that a file system messes with all three
> aspects of it.
> 
> >>  c) use §b as file name (of course, leaving the original extension as it
> >> is)
> >
> > Why the extension? DOS nostalgia?
> 
>  The local copies should represent the web URLs as close as possible
> in order to minimize "what came from where" kinds of confusions. Also
> from the same URL you would then download the corresponding pdf file
> with exactly the same name, the only difference being the extension.

The extension is part of the name. If you preserve it as is, what
happens when it contains a "funky" character.

> >> // __ $_SHA256:
> >> |7d5895cb24ab49692a8ad495e036074fec8e61b22040544f02a9b69c926dbdeb  -|
> >
> >
> > I only see harmless hexadecimal chars there.
> >
> >>  I am trying to avoid funky characters and sha256sum --text still
> >> generates them!?!
> >
> > Where are there "funky chars"?
> 
>  This is the first time I have seen blank spaces and hyphens in a text
> segment's sum. Those characters might be confusing.

You calculated the sha256sum of stdin. - is the name of the input file
you encoded. Duh.

Cheers,
David.

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sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-26 09:50 +0200
  Re: sha256sum --text generating blank spaces and hyphens? <tomas@tuxteam.de> - 2023-04-26 10:20 +0200
    Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-26 16:40 +0200
      Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-26 16:50 +0200
        Re: sha256sum --text generating blank spaces and hyphens? Max Nikulin <manikulin@gmail.com> - 2023-04-28 04:30 +0200
          Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-28 10:10 +0200
            Re: sha256sum --text generating blank spaces and hyphens? Max Nikulin <manikulin@gmail.com> - 2023-04-28 18:50 +0200
              Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-29 11:00 +0200
                Re: sha256sum --text generating blank spaces and hyphens? Max Nikulin <manikulin@gmail.com> - 2023-04-29 14:20 +0200
                Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-29 14:30 +0200
      Re: sha256sum --text generating blank spaces and hyphens? Dan Ritter <dsr@randomstring.org> - 2023-04-26 17:10 +0200
      Re: sha256sum --text generating blank spaces and hyphens? David Wright <deblis@lionunicorn.co.uk> - 2023-04-26 17:10 +0200
      Re: sha256sum --text generating blank spaces and hyphens? "Thomas Schmitt" <scdbackup@gmx.net> - 2023-04-26 17:10 +0200
      Re: sha256sum --text generating blank spaces and hyphens? <tomas@tuxteam.de> - 2023-04-26 19:00 +0200
        Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-26 22:40 +0200
          Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-26 23:10 +0200
          Re: sha256sum --text generating blank spaces and hyphens? Andy Smith <andy@strugglers.net> - 2023-04-26 23:50 +0200
  Re: sha256sum --text generating blank spaces and hyphens? Andy Smith <andy@strugglers.net> - 2023-04-26 12:50 +0200
  Re: sha256sum --text generating blank spaces and hyphens? Jeffrey Walton <noloader@gmail.com> - 2023-04-26 18:00 +0200
  Re: sha256sum --text generating blank spaces and hyphens? David Christensen <dpchrist@holgerdanske.com> - 2023-04-27 00:50 +0200
    Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-27 00:50 +0200
      Re: sha256sum --text generating blank spaces and hyphens? David Christensen <dpchrist@holgerdanske.com> - 2023-04-27 06:10 +0200
        Re: sha256sum --text generating blank spaces and hyphens? Max Nikulin <manikulin@gmail.com> - 2023-04-27 08:00 +0200
          Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-27 09:30 +0200
        Re: sha256sum --text generating blank spaces and hyphens? Nicolas George <george@nsup.org> - 2023-04-27 10:10 +0200
          Re: sha256sum --text generating blank spaces and hyphens? David Christensen <dpchrist@holgerdanske.com> - 2023-04-27 17:20 +0200
            Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-05-02 02:10 +0200
    Re: sha256sum --text generating blank spaces and hyphens? Albretch Mueller <lbrtchx@gmail.com> - 2023-04-27 01:30 +0200
      Re: sha256sum --text generating blank spaces and hyphens? David Christensen <dpchrist@holgerdanske.com> - 2023-04-27 06:30 +0200

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