How to restore $? AND $_ ?

How to restore $? AND $_ ?

[Sebastian Gniazdowski]

Hello,
consider the following:

sched-fun() {
    # UND=$_
    local ret=$?

    sched +1 "sched-fun \$_"

    # : $UND
    return $ret
}

The point is that the 2 commented lines must be run in the same place
as the next lines after them in order to work. No way out of this
problem? It is about not disrupting user session with background
tasks, I think that this is in general important.
-- 
Sebastian Gniazdowski
News: https://twitter.com/ZdharmaI
IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
Blog: http://zdharma.org

Re: How to restore $? AND $_ ?

[Sebastian Gniazdowski]

False alarm – Zsh pushes the $_ values onto some kind of stack:

() { : test2 } test1; echo $_
test1

so appending $_ to the sched's argument is sufficient.

On Wed, 24 Jul 2019 at 08:20, Sebastian Gniazdowski
<sgniazdowski@gmail.com> wrote:
>
> Hello,
> consider the following:
>
> sched-fun() {
>     # UND=$_
>     local ret=$?
>
>     sched +1 "sched-fun \$_"
>
>     # : $UND
>     return $ret
> }
>
> The point is that the 2 commented lines must be run in the same place
> as the next lines after them in order to work. No way out of this
> problem? It is about not disrupting user session with background
> tasks, I think that this is in general important.
> --
> Sebastian Gniazdowski
> News: https://twitter.com/ZdharmaI
> IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
> Blog: http://zdharma.org



-- 
Sebastian Gniazdowski
News: https://twitter.com/ZdharmaI
IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
Blog: http://zdharma.org