Re: test -t can distinguish compile sessions

[Puff Addison]

Robert Hundt wrote:
> Hey Dan,
>
> I guess you would have to check the process tree (via ps -ef) and see
> whether emacs is somwhere the parent of your current shell.
>
> For example (on HP-UX, needs adjustment for your shell):
>
> ps -ef | grep `ps -ef | grep $$ | grep ksh | grep -v grep | awk '{ print
> $3 }' ` >out
> cat out | grep -v /ksh | grep -v grep | grep /emacs
> if [[ $? = 0 ]] then
>    echo "We are emacs"
> fi
>
> -- Robert
>
> "Dan Jacobson" <jidanni@jidanni.org> wrote in message
> 8765nc2i6n.fsf@jidanni.org">news:8765nc2i6n.fsf@jidanni.org...
>
> > How can a shell script tell that we can't talk back, i.e. we are
> > either in a batch job or a emacs compile session? test -t doesn't
> > catch the latter, nor does test -t 0. case $- in *i*) isn't too
> > helpful either.  No, don't tell me how to talk back during compile
> > sessions, just tell me how to test...
> > --
> > http://jidanni.org/ Taiwan(04)25854780
The tty command does this:
try
$ tty
and
$ cat | tty
^D

        Puff Addison