On 2024-04-01 06:54, Mark J. Reed wrote:
> I haven't read your whole message yet, but to unshift a new value in 
> front of the positional params, all you have to do is this:
>
>
>     set -- "$new" "$@"
>
> And now $1 is "$new", $2 is whatever $1 used to be, and so on.
>
... ah, I see, you want to just /undo/ a shift. Well, AFAIK you can't do 
that without manually saving the value that was in $1 before the shift 
somewhere. Then you can use *set *to put it back.

No problemo.  saving the previous '$1' is no issue, I can hardly expect 
it to be saved somewhere automatically, that would be a courtesy hardly 
of much use and not worth the bother.  The 'set' trick above is exactly 
perfect.

Thanks Mark.