Re: Image handling in mutt
On 2023-12-11 07:32:30 -0500, Pocket wrote:
>
> On 12/11/23 07:12, Vincent Lefevre wrote:
> > On 2023-12-10 15:51:02 -0500, Pocket wrote:
> > > On Dec 10, 2023, at 3:05 PM, David Wright<deblis@lionunicorn.co.uk> wrote:
> > > > ¹ Re the argument raging in this thread about "extension", the
> > > > term is clearly appropriate, as a glance at /etc/mime.types
> > > > demonstrates. The literature is full of the term.
> > > >
> > > > I wouldn't want to use "suffix" myself, as it's too general:
> > > > anything stuck on the end is a suffix, but not necessarily
> > > > a filename extension. Suffixes are used for other purposes.
> > > Suffix is the correct term.
> > A filename extension is a suffix, but a suffix (e.g. as in POSIX)
> > is not necessarily a filename extension.
>
> Not in the microsoft world, it is REQUIRED and that is what the OS
> needs to tell what kind of file it is dealing with. Unix/Linux has
> no resrictions.
I do not care about the "microsoft world", and I doubt that this is
required there at the low level (what would be the equivalent of the
Linux kernel). The filename extension matters at a high level, e.g.
to select which application should be run, but similar choices are
also done under Linux, where this is implemented by utilities,
libraries, or applications themselves. There are other methods under
Linux, such as content sniffing (the method used by "file"), which
has advantages, but also drawbacks (the file needs to be readable,
and mainly for the various text formats, sniffing is unreliable;
good luck with the diff and json formats, for instance).
And even when the application is known, e.g. when the file type is
given by a MIME type, a filename extension may be necessary. See
the various "nametemplate" fields in /etc/mailcap, for instance.
> > For instance:
> >
> > $ basename foobar bar
> > foo
> >
> > Here, "bar" is a suffix, but it does not have the form of a
> > filename extension.
>
> No bar is part of the filespec
No, read the POSIX standard:
SYNOPSIS
basename string [suffix]
This is explicitly called suffix.
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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