tty settings

tty settings

[Stefan Monnier]

When I use zsh inside an Emacs shell buffer, I get all kinds of ugly
^M's and echoing of the command.  By experimenting with other shells
I came to the conclusion that it's zsh's fault in that it changes the
tty settings (like 'echo').

Better yet, it seems that zsh resets the `echo' setting whenever a prompt is
displayed (and even if ttyctl is unfrozen):

    % ttyctl -u; stty -echo; stty -a | grep echo
    isig icanon iexten -echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke
    % stty -a | grep echo
    isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke
    % ttyctl
    tty is not frozen
    % 

How can I convince zsh (3.0.5) not to mess around with the tty settings
in Emacs shells buffers (TERM=dumb) ?


	Stefan

tty settings

[Vincent Lefevre]

Under some conditions (from a failsafe session with Solaris 2.5),
when I start an xterm and zsh, the tty settings are not correct.
For instance, susp is undefined. But if I use tcsh, it is OK
(though I don't set anything in my .cshrc). So, why are the tty
settings wrong with zsh only? What should I do to have the standard
ones?

-- 
Vincent Lefevre <Vincent.Lefevre@ens-lyon.fr> - PhD stud. in Computer Science
Web: http://www.ens-lyon.fr/~vlefevre/ - 100% validated HTML - Acorn Risc PC,
Yellow Pig 17, Championnat International des Jeux Mathematiques et Logiques,
TETRHEX, Faits divers insolites, etc...

Re: tty settings

[TGAPE!]

Vincent Lefevre wrote:
> 
> Under some conditions (from a failsafe session with Solaris 2.5),
> when I start an xterm and zsh, the tty settings are not correct.
> For instance, susp is undefined. But if I use tcsh, it is OK
> (though I don't set anything in my .cshrc). So, why are the tty
> settings wrong with zsh only? What should I do to have the standard
> ones?

I seem to recall that tcsh explicitly does a stty before it prints
the first prompt, setting all of its standard settings.  I have talked
with a few SCO people who found this annoying, as SCO has some different
(really demented, IMHO) ideas on what those settings should be (for
example, intr is set to ^?.)  They were confused about why their csh
used ^?, and their tcsh used ^C.


I suggest putting them in your .zlogin or .zprofile.  Not specifying
something like this is a good way to mess yourself up on cross-platform
hops, not to mention the fun you get when your sysadmin decides to
recompile your shell with different defaults, and forgets to mention it.
(BTDT, WNDIA)

Ed Grimm