All login shells are interactive?

All login shells are interactive?

[alnesbit]

That's what the FAQ says, but I don't understand how this can be true.
Surely you can have a non-interactive login shell, like, say

    zsh -l -c 'echo Non-interactive login shell'

Andrew.

Re: All login shells are interactive?

[Philippe Troin]

alnesbit@optushome.com.au writes:

> That's what the FAQ says, but I don't understand how this can be true.
> Surely you can have a non-interactive login shell, like, say
> 
>     zsh -l -c 'echo Non-interactive login shell'

Yes indeed. And it is used by at least gnome-session and CDE when you
start an X session.

Phil.

Re: All login shells are interactive?

[Nadav Har'El]

On Sun, Oct 13, 2002, Philippe Troin wrote about "Re: All login shells are interactive?":
> alnesbit@optushome.com.au writes:
> > That's what the FAQ says, but I don't understand how this can be true.
> > Surely you can have a non-interactive login shell, like, say
> > 
> >     zsh -l -c 'echo Non-interactive login shell'
> 
> Yes indeed. And it is used by at least gnome-session and CDE when you
> start an X session.

Right. I even use this trick myself: my ~/.xsession file starts with a

	#!/bin/zsh -l

line, so that it (and everything in it) gets run after zsh has read my
~/.zprofile, including all my enviroment variables (e.g., my PATH).

This is why when I wanted my .zprofile to print a welcome message only
for interactive login shells, I did something like this in .zprofile:

# We print this message only in a shell which is both interactive and a login
# shell. Alternatively we can move this message to zshrc, inside a test if $-
# contains l (i.e., a login shell). 
case $- in
*i*)
    print "*** $ZSH_NAME $ZSH_VERSION, $VENDOR $MACHTYPE"
    print -P "Welcome to %m, %D{%A}, %D{%e %B %Y}, %t.";;
esac


-- 
Nadav Har'El                        |      Sunday, Oct 13 2002, 8 Heshvan 5763
nyh@math.technion.ac.il             |-----------------------------------------
Phone: +972-53-245868, ICQ 13349191 |Always remember you're unique, just like
http://nadav.harel.org.il           |everyone else.

Re: All login shells are interactive?

[Peter Stephenson]

alnesbit@optushome.com.au wrote:
> That's what the FAQ says, but I don't understand how this can be true.
> Surely you can have a non-interactive login shell, like, say
> 
>     zsh -l -c 'echo Non-interactive login shell'

Indeed, 

% zsh -l -c '[[ -o interactive ]] && print I am interactive
quote> [[ -o login ]] && print I am a login shell'
I am a login shell

and it sources /etc/zlogin and .zlogin, too.  The manual never actually
defines the term `login shell', but in practice it's tied to the option.

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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Re: All login shells are interactive?

[alnesbit]

Thanks to all for the confirmation of my hunch.  I sent a bug-report to
zsh-workers@sunsite.dk.

Andrew