getting 'clear' to work in Emacs shell

Ken Brown kbrown@cornell.edu
Mon Oct 18 14:59:00 GMT 2010


On 10/18/2010 9:53 AM, Jeff Rancier wrote:
> GNU Emacs 21.3.1 (i386-msvc-nt5.1.2600) of 2003-03-27 on buffy
> GNU bash, version 3.2.51(24)-release (i686-pc-cygwin)
> CYGWIN_NT-5.1 1.7.7(0.230/5/3) 2010-08-31 09:58
> Microsoft Windows XP Pro - Version 2002, SP3
>
> The 'clear' work's  in a Cygwin Bash session,
>
> C106426@USLINY2R86KRP8 ~
> $ alias  clear
> alias clear='cat ~/.cls'
>
> C106426@USLINY2R86KRP8 ~
> $ less  .cls
> ESC[2J
> .cls (END)
>
> But doesn't  within Emacs:
>
> C-z runs the command  shell
>     which is an interactive compiled Lisp function in `shell'.
> (shell&optional BUFFER)
>
> All I get within an  Emacs shell session is the following, without clearing the
> screen.  Is there  some envionment variable I need to set here?
>
>
> bash-3.2$  clear
> [2J
> bash-3.2$

I'm not sure what you're expecting here.  Do you want emacs to delete 
what's in the *shell* buffer?  Or just scroll it so that nothing is 
visible but the prompt?  FWIW, typing 'clear' in an emacs shell buffer 
under Linux doesn't have any visible effect either.  (Here it runs 
/usr/bin/clear.)  So I don't think this has anything to do with Cygwin.

Ken

Ken

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