[Bug 1297051] Re: gnome-terminal doesn't recognise C1 controls

[Egmont Koblinger]

> Please excuse my ignorance but I don't know how to do that. Can you tell
> me what commands to type?
> Is it in a repository somewhere or do I have to build from source?

You need to build from source, which goes something like this:

wget ftp://ftp.gnome.org/pub/GNOME/sources/vte/0.37/vte-0.37.2.tar.xz
tar xf vte-0.37.2.tar.xz
cd vte-0.37.2
patch -p1 < [the patch filename that fixes this bug]
./configure
[if there are any errors, install the missing packages and re-run]
make
./src/vte-2.91 --encoding=latin1   # or whichever other encoding you wish to use
[and then try your application in this new window

> Pretty much any sensible application should do that (regarding CSI at
> least) because ... why transmit two characters (ESC [) instead of one
> character (0x9B)?

Pretty much all sensible applications have been using UTF-8 for almost a
decade now, and in this encoding both of these escapes take up 2 bytes.
And these days when you watch videos of cats online, who cares about 1
more byte? :)

So far you're the only person who filed this bug against VTE, and it
doesn't even work in xterm with UTF-8, which implies that the usage of
C1 is extremely uncommon.

> In my case the remote system is a mix of built-in programs (for example,
> the editor) and custom-written programs, most of which assume that a
> one-character CSI (0x9B) works.

Really out of curiosity, could you please name a few of these "built-in
programs (for example, the editor)" along with the system they're
running on?  (I don't care about the custom-written programs that much,
but I do care about those that have a potential that other people also
use them.)

That being said, if the patch works for you, I'd be happy to apply it.

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https://bugs.launchpad.net/bugs/1297051

Title:
  gnome-terminal doesn't recognise C1 controls

Status in “vte3” package in Ubuntu:
  New

Bug description:
  gnome-terminal seems not to recognise the C1 control characters.

  The particular character that is a problem for me is CSI. However
  there may be a generic issue with non-support of this whole range of
  characters.

  This range of characters should only be recognised when the encoding
  is a character set that is defined to include the C1 control
  characters but, at a quick look, that is all of the ISO-8859-x
  character sets and Unicode. (C1 control characters require encoding as
  a 2 byte sequence when the encoding is UTF-8. As unlikely as this may
  be to occur in practice, UTF-8 is not inconsistent with C1 control
  characters.)

  Part of the motivation for raising this bug report is that PuTTY seems
  to have declined in reliability recently and so I looked at why I am
  using PuTTY as opposed to gnome-terminal. Correct support of C1
  control characters is one reason. This works in PuTTY. It does not
  appear to work in gnome-terminal. Perhaps resources would be better
  spent making gnome-terminal work as well as PuTTY does, rather than
  attempting to get PuTTY fixed.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: gnome-terminal 3.6.1-0ubuntu6
  ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
  Uname: Linux 3.11.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  Date: Tue Mar 25 11:08:00 2014
  InstallationDate: Installed on 2011-10-25 (881 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MarkForUpload: True
  SourcePackage: gnome-terminal
  UpgradeStatus: Upgraded to saucy on 2013-11-08 (136 days ago)

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