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Re: Image handling in mutt

From jeremy ardley <jeremy.ardley@gmail.com>
Newsgroups linux.debian.user
Subject Re: Image handling in mutt
Date 2023-12-11 23:10 +0100
Message-ID <HJWDn-cVq0-1@gated-at.bofh.it> (permalink)
References (2 earlier) <HJNqp-cPQS-3@gated-at.bofh.it> <HJNJL-cPXK-9@gated-at.bofh.it> <HJNTr-cQ17-1@gated-at.bofh.it> <HJOmt-cQqs-11@gated-at.bofh.it> <HJSJr-cSTr-17@gated-at.bofh.it>
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On 12/12/23 01:49, Jeremy Nicoll wrote:
> There's no concept of filetype in file systems used for the MVS side
> of z/OS systems.  (These days there's also Unix/Linux environments
> & of course they do have more familiar file naming structures.)


If you look at the NTFS file system - supported by most O/S including 
Debian, the file extension is only of use to user programs to help users 
select they type of files they want e.g. .jpg. It has no meaning at all 
to the applcations that use them.

Underneath the hood of a NTFS file is alternate data streams (ADS). That 
is a single file can contain main different 'sub files' of completely 
different content type. Each ADS has metadata describing the stream.

ADS were first conceived to provide say different language versions of a 
text file, but that is only an example. An ADS in a file could contain 
an executable as well as a text file. Theoretically you could also have 
a video stream and a subtitle stream and multiple audio streams, but 
that is usually better provides by container formats like ogg vorbis

In unixland file systems like ZFS have extended attributes but nothing 
like ADS

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Thread

Image handling in mutt Paul M Foster <paulf@quillandmouse.com> - 2023-12-08 18:00 +0100
  Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-08 18:10 +0100
    Re: Image handling in mutt Paul M Foster <paulf@quillandmouse.com> - 2023-12-08 22:50 +0100
      Re: Image handling in mutt David <bouncingcats@gmail.com> - 2023-12-08 23:00 +0100
        Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-08 23:10 +0100
          Re: Image handling in mutt Greg Wooledge <greg@wooledge.org> - 2023-12-08 23:40 +0100
            Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-08 23:50 +0100
              Re: Image handling in mutt Greg Wooledge <greg@wooledge.org> - 2023-12-09 00:00 +0100
                Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-09 00:10 +0100
                Re: Image handling in mutt Greg Wooledge <greg@wooledge.org> - 2023-12-09 00:20 +0100
                Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-09 00:30 +0100
              Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-09 00:00 +0100
            Re: Image handling in mutt John Hasler <john@sugarbit.com> - 2023-12-09 00:00 +0100
              Re: Image handling in mutt Greg Wooledge <greg@wooledge.org> - 2023-12-09 00:00 +0100
                Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-09 00:30 +0100
          Re: Image handling in mutt Eric S Fraga <e.fraga@ucl.ac.uk> - 2023-12-09 09:50 +0100
            Re: Image handling in mutt Curt <curty@free.fr> - 2023-12-10 17:20 +0100
              Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-10 17:30 +0100
                Re: Image handling in mutt songbird <songbird@anthive.com> - 2023-12-10 19:40 +0100
                Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-10 19:50 +0100
                Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-10 21:20 +0100
                Re: Image handling in mutt songbird <songbird@anthive.com> - 2023-12-11 02:30 +0100
                Re: Image handling in mutt debian-user@howorth.org.uk - 2023-12-11 16:30 +0100
                Re: Image handling in mutt songbird <songbird@anthive.com> - 2023-12-11 21:20 +0100
          Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 12:40 +0100
            Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-11 13:30 +0100
        Re: Image handling in mutt "Loris Bennett" <loris.bennett@fu-berlin.de> - 2023-12-11 14:10 +0100
      Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-10 21:10 +0100
        Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-10 22:00 +0100
          Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 13:20 +0100
            Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-11 13:40 +0100
              Re: Image handling in mutt Arno Lehmann <al@its-lehmann.de> - 2023-12-11 13:50 +0100
                Re: Image handling in mutt Greg Wooledge <greg@wooledge.org> - 2023-12-11 14:20 +0100
                Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 15:10 +0100
                Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-11 15:40 +0100
                Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 16:20 +0100
                Re: Image handling in mutt "Jeremy Nicoll" <jn.ml.dbi.73@letterboxes.org> - 2023-12-11 19:00 +0100
                Re: Image handling in mutt jeremy ardley <jeremy.ardley@gmail.com> - 2023-12-11 23:10 +0100
                On file systems [was: Image handling in mutt] <tomas@tuxteam.de> - 2023-12-12 06:40 +0100
                Re: On file systems "Thomas Schmitt" <scdbackup@gmx.net> - 2023-12-12 11:50 +0100
              Re: Image handling in mutt Eric S Fraga <e.fraga@ucl.ac.uk> - 2023-12-11 13:50 +0100
              Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 15:00 +0100
                Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-11 15:20 +0100
                Re: Image handling in mutt Vincent Lefevre <vincent@vinc17.net> - 2023-12-11 15:40 +0100
                Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-11 15:50 +0100
                Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-11 15:50 +0100
          Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-11 16:00 +0100
            Re: Image handling in mutt Pocket <pocket@columbus.rr.com> - 2023-12-11 16:10 +0100
              Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-11 17:10 +0100
            Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-11 16:10 +0100
              Re: Image handling in mutt Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-11 16:20 +0100
                Re: Image handling in mutt <tomas@tuxteam.de> - 2023-12-11 16:30 +0100
  Re: Image handling in mutt Zenaan Harkness <zenaan@gmail.com> - 2023-12-11 00:10 +0100
    Re: Image handling in mutt Zenaan Harkness <zenaan@gmail.com> - 2023-12-11 01:20 +0100
    Re: Image handling in mutt David Wright <deblis@lionunicorn.co.uk> - 2023-12-11 16:30 +0100

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