stty size doesn't work

stty size doesn't work

[Ray Andrews]

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I doubt this is zsh's problem but she may have a solution just the 
same.  I do this in my 'i' function:

     width=${=$( stty size )[2]}

... and it works fine, however if I call the function thusly:

    _function_test ()
    {
         local integer i=0
         while read aa; do
             let i++
             eval ${=aa} 2> /dev/null
         done
    }

     $ _function_test <<< "i path"

... 'width' is zero.  I think this is some 'stty' issue, still the 
function will be running in a terminal and the terminal has a width so 
it puzzles me that no width can be reported.


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Re: stty size doesn't work

[Roman Perepelitsa]

On Sun, Oct 23, 2022 at 10:47 PM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
> I doubt this is zsh's problem but she may have a solution just the same.  I do this in my 'i' function:
>
>     width=${=$( stty size )[2]}
>
> ... and it works fine, however if I call the function thusly:
>
> _function_test ()
> {
>     local integer i=0
>     while read aa; do
>         let i++
>         eval ${=aa} 2> /dev/null
>     done
> }
>
>     $ _function_test <<< "i path"
>
> ... 'width' is zero.

`stty size` needs the TTY as stdin. When you are invoking it from
_function_test, stdin is not a TTY. Use $COLUMNS instead. There is
also $LINES if you need height.

    width=$COLUMNS

Roman.

Re: stty size doesn't work

[Ray Andrews]

On 2022-10-23 15:21, Roman Perepelitsa wrote:
> width=$COLUMNS 

It's that simple! Thanks.



> Roman.
>