Re: On prompt in shell mode

[Angelo Graziosi <angelo.graziosi@alice.it>]

Stefan Monnier ha scritto:
>>>> The following regards Emacs (trunk) both on Linux and Cygwin. 
>>>> When I do: M-x shell, the prompt has garbage: 
>>>> ^[]0;~/downloads/cygwinports^G ^[[32mangelo@host 
>>>> ^[[33m~/downloads/cygwinports^[[0m $ being echo PS1 
>>>> \[\e]0;\w\a\]\n\[\e[32m\]\u@\h \[\e[33m\]\w\[\e[0m\]\n\$
>>> Doesn't look like garbage to me: it looks like the exact 
>>> (garbage) codes specified in your PS1.  After all \e is ^[ and \a
>>>  is ^G (IIRC).
>>> 
>>> You should be careful to choose the escape sequences in your PS1
>>>  according to the escape sequences accepted by the terminal 
>>> emulator in which the shell is running (which is reflected in the
>>>  $TERM envvar).
> 
>> Obviously, what you call "the exact (garbage) codes specified in 
>> your PS1" in RXVT, MRXVT, URXVT, (KDE)Konsole produces:
> 
>> angelo@host ~/downloads/cygwinports $
> 
> I do not doubt it.  They are codes meant specifically for those 
> terminal emulators so it's no wonder they do what you want there.

No! They are codes (escape sequences) for BASH shell. Many people use
different shells (zsh, tcsh,...) which have different syntax.

> Try it on a wyse terminal, or in the Linux console.  M-x shell is not
>  a terminal

Sorry, but I have already cited GNU/Linux and KDE-Konsole! on which
there is the same problem!... and have sent another post [1].

I have pointed this problem because I think that M-x shell does not
interpret correctly some escape/code; googling or searching in
help-emacs, shows this is an acient problem whose workarounds do not
seem to work with 23 (and 22?).

Obviously that is only my opinion.

         Angelo

> emulator.  M-x term is more likely to do what you want (tho I do not
>  guarantee that all those escape sequences are supported, especially 
> the one that sets the window title).


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[1] http://lists.gnu.org/archive/html/emacs-devel/2008-08/msg00556.html