Re: question .. did u implent when checkwinsize no need to exteral bin to update

[Grisha Levit]

On Sun, Apr 23, 2023, 16:01 Kerin Millar <kfm@plushkava.net> wrote:

> On Sun, 23 Apr 2023 15:01:25 -0400
> Grisha Levit <grishalevit@gmail.com> wrote:
>
> > On Sun, Apr 23, 2023, 11:56 alex xmb ratchev <fxmbsw7@gmail.com> wrote:
> >
> > > hmm , thank you
> > > i go the /bin/true way then
> > >
> >
> > You can also use (:) to save an exec.
>
> This is not case because : is a builtin. For COLUMNS and LINES to be set,
> either the command must be external or the shell must be interactive and
> must have received SIGWINCH.
>
> $ bash -c 'declare -p COLUMNS LINES; :; declare -p COLUMNS LINES'
>

Indeed, `:' by itself is not enough, but please note that my suggestion was
`(:)', not `:'.

$ bash -c '(:); declare -p LINES'
declare -- LINES="50"

>