GNU bug report logs - #7512
24.0.50; emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: jidanni <at> jidanni.org
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Mon, 29 Nov 2010 01:58:55 +0800

X-debbugs-CC: dickey <at> invisible-island.net

No big deal, but
$ emacs -Q -nw -eval '(view-lossage)'
shows
ESC [ > 0 ; 2 6 6 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0
/ 0 0 0 0 / 0 0 0 0 ESC \
when run in xterm. I did not type that.

$ env|grep -i xterm
TERM=xterm
XTERM_SHELL=/bin/bash
XTERM_LOCALE=zh_TW.UTF-8
XTERM_VERSION=XTerm(266)

In GNU Emacs 24.0.50.1 (i486-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2010-11-21 on elegiac, modified by Debian

Message #8 received at 7512 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: jidanni <at> jidanni.org
Cc: rfrancoise <at> debian.org, 7512 <at> debbugs.gnu.org
Subject: Re: bug#7512: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Sat, 02 Jul 2011 23:28:33 +0200

jidanni <at> jidanni.org writes:

> No big deal, but
> $ emacs -Q -nw -eval '(view-lossage)'
> shows
> ESC [ > 0 ; 2 6 6 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0
> / 0 0 0 0 / 0 0 0 0 ESC \
> when run in xterm. I did not type that.

I can confirm this in a "C" locale, too:

ESC [ > 0 ; 2 6 1 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0
/ 0 0 0 0 / 0 0 0 0 ESC \ d s d s RET ESC x ESC p ESC
x v i e w - l o s TAB RET

Are those escape codes registered as typed keystrokes?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #11 received at 7512 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 7512 <at> debbugs.gnu.org, rfrancoise <at> debian.org, jidanni <at> jidanni.org
Subject: Re: bug#7512: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Sun, 03 Jul 2011 02:22:25 -0400

> From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
> Date: Sat, 02 Jul 2011 23:28:33 +0200
> Cc: rfrancoise <at> debian.org, 7512 <at> debbugs.gnu.org
> 
> jidanni <at> jidanni.org writes:
> 
> > No big deal, but
> > $ emacs -Q -nw -eval '(view-lossage)'
> > shows
> > ESC [ > 0 ; 2 6 6 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0
> > / 0 0 0 0 / 0 0 0 0 ESC \
> > when run in xterm. I did not type that.
> 
> I can confirm this in a "C" locale, too:
> 
> ESC [ > 0 ; 2 6 1 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0
> / 0 0 0 0 / 0 0 0 0 ESC \ d s d s RET ESC x ESC p ESC
> x v i e w - l o s TAB RET
> 
> Are those escape codes registered as typed keystrokes?

See xterm.el:terminal-init-xterm, search for send-string-to-terminal.
In a nutshell, we send special commands to the terminal to find out
about its capabilities.

Message #14 received at 7512 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Lars Magne Ingebrigtsen <larsi <at> gnus.org>, jidanni <at> jidanni.org,
	rfrancoise <at> debian.org, 7512 <at> debbugs.gnu.org
Subject: Re: bug#7512: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Sun, 03 Jul 2011 22:04:04 -0400

Eli Zaretskii <eliz <at> gnu.org> writes:

> See xterm.el:terminal-init-xterm, search for send-string-to-terminal.
> In a nutshell, we send special commands to the terminal to find out
> about its capabilities.

And it's scarcely worth it to try to remove these characters from
lossage, so feel free to close this bug.

Message #17 received at 7512 <at> debbugs.gnu.org (full text, mbox):

From: jidanni <at> jidanni.org
To: cyd <at> stupidchicken.com
Cc: eliz <at> gnu.org, rfrancoise <at> debian.org, larsi <at> gnus.org, 7512 <at> debbugs.gnu.org
Subject: Re: bug#7512: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Mon, 04 Jul 2011 10:45:21 +0800

>>>>> "CY" == Chong Yidong <cyd <at> stupidchicken.com> writes:
CY> Eli Zaretskii <eliz <at> gnu.org> writes:

>> See xterm.el:terminal-init-xterm, search for send-string-to-terminal.
>> In a nutshell, we send special commands to the terminal to find out
>> about its capabilities.

CY> And it's scarcely worth it to try to remove these characters from
CY> lossage, so feel free to close this bug.

But maybe also p u t  s o m e  t i n y  h i n t  i n t o that buffer so
folks know what is going on. 

Message #20 received at 7512 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: jidanni <at> jidanni.org
Cc: eliz <at> gnu.org, rfrancoise <at> debian.org, larsi <at> gnus.org, 7512 <at> debbugs.gnu.org
Subject: Re: bug#7512: 24.0.50;
	emacs -Q -nw -eval '(view-lossage)' shows phantom chars under xterm
Date: Mon, 04 Jul 2011 01:28:18 -0400

jidanni <at> jidanni.org writes:

> But maybe also p u t  s o m e  t i n y  h i n t  i n t o that buffer so
> folks know what is going on.

No, I don't think it's worth it.

Closing the bug.

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