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bug#34224: 25.1; ansi-term displays garbage on tree(1) command


From: Eli Zaretskii
Subject: bug#34224: 25.1; ansi-term displays garbage on tree(1) command
Date: Tue, 29 Jan 2019 18:17:00 +0200

severity 34224 wishlist
thanks

> Date: Tue, 29 Jan 2019 10:10:54 +1300
> From: Phil Sainty <address@hidden>
> Cc: Marvin Gülker <address@hidden>,
>  address@hidden
> 
> On 2019-01-29 04:47, Eli Zaretskii wrote:
> > If someone can tell what does 'tree' do to "turn on ANSI line graphics
> > hack", then perhaps we could decide whether there's something wrong
> > with how Emacs interprets the bytestream delivered to it by 'tree' in
> > this mode.
> 
> Does this help?
> 
> 
> $ tree -A | cat -v
> .
> ^[(0tqq ^[(Bbar
> ^[(0tqq ^[(Bfoo
> ^[(0mqq ^[(Bsubdir
> ^[(0    tqq ^[(Bbar
> ^[(0    mqq ^[(Bfoo
> 
> 1 directory, 4 files

Yes, thanks.  These are escape sequences which term.el doesn't
currently support:

  (defun term-emulate-terminal (proc str)
  [...]
                  ;; Ignore NUL, Shift Out, Shift In.
                  ((or ?\0 #xE #xF 'nil) nil))

Patches to add such support are welcome.





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