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Re: Bash manual - interactive shell definition


From: Pierre Gaston
Subject: Re: Bash manual - interactive shell definition
Date: Fri, 12 Mar 2010 11:57:41 +0200

On Fri, Mar 12, 2010 at 11:50 AM, Ken Irving <address@hidden> wrote:

> On Fri, Mar 12, 2010 at 09:16:05AM +0000, Marc Herbert wrote:
> > >> Could this sentence:
> > >>
> > >> "An interactive shell is one started without non-option arguments,
> > >> unless -sis specified, without specifying the
> > >> -c option, and whose input and error output are both connected to
> terminals
> > >> (as determined by isatty(3)), or one started with the -i option. "
> > >>
> > >> be any more confusing?
> > >
> > > Is seems pretty clearly stated to me.
> >
> > Please enlighten us with the priority of English boolean operators.
> >
> > I have never seen a natural language sentence with so many boolean
> operators.
>
> Well I can try.
>
>    An interactive shell is one started without non-option arguments,
>
> If there are any arguments then they must be options...
>
>    unless -s is specified,
>
> bash(1) says: "If the -s option is present ... then commands are read
> from the standard input", which clearly is not interactive.
>

If you run "bash -s foo bar" in a terminal it starts an interactive shell.


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