Mail Archives: cygwin/2005/11/22/19:52:32
On Tue, 22 Nov 2005, Robert Body wrote:
> I have not been able to figure out how to send escape codes to ksh
KSH does not understand escape codes. You have to embed literal special
characters into $PS1.
> I saw a syntax for ksh on
> http://www.steveshilling.pwp.blueyonder.co.uk/scripts/xtermtitle.txt
> ---------
> PS1='^[]0;${USER}@${HOST}: ${PWD}^Gksh$ '
> ---------
> where ^[ is used instead of \033 and ^G instead of \007
> but I tried 3 systems with ksh, no go, it doesn't understand escape
> characters, not with \032, not with \[\e and not with ^[ to signfy beginning
> of escape code... ksh just repeats them exactly like regular characters
In bash, you can type in the following character sequence (sans the
spaces):
P S 1 = ' Ctrl-V Esc ] 0 ; $ { U S E R } @ $ { H O S T } : Space $ { P W D } Ctrl-V Ctrl-G k s h $ Space '
To get the above prompt. Then start ksh.
> in bash it's easy
> --------
> PS1='\[\e]0;$PWD\a\]$PWD> ' # (in title) HOST-$PWD ... $PATH>
> --------
>
> I came up with the following... needs perl, needs xterm
> but works in ksh, and bash too
> --------
> PS1=$(perl -e 'printf "\033]0;\$PWD\007\$PWD> "')
> --------
Sure, that works too. You can use awk or sed instead of perl (which have
the advantage of being part of the default installation).
> but i just don't know how (and someone must know how) people get the
> escape codes into ksh that it works from command prompt or script with a
> one line solution (and without secondary help from something like c or
> perl code)
Both vi and emacs allow you to enter special characters literally. Edit
your .profile (or /etc/profile), and you're all set. The ksh-related
section of the default /etc/profile has a bug and doesn't work.
> Oh, the purpose of this escape sequence is to synchronize the title with
> PS1 to be the current directory on an xterm (but the question is about
> escape codes, not xterm ;-) )
Again, ksh does not understand escape codes. Neither does ash. Use
literal characters.
Igor Pechtchanski
Volunteer PDKSH maintainer for Cygwin
--
http://cs.nyu.edu/~pechtcha/
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