Mailinglist Archive: opensuse-factory (422 mails)

[Dave Plater <dave.plater@xxxxxxxxxxx>]

Dominique Leuenberger wrote:
> > > > On 1/21/2009 at  2:03 PM, "Dominique Leuenberger"
> > > >         
> <Dominique.Leuenberger@xxxxxxxxxxxxx> wrote: 
>   
> > > > > On 1/21/2009 at  2:00 PM, Dave Plater <dave.plater@xxxxxxxxxxx> wrote: 
> > > > >           
> > > Dominique Leuenberger wrote:
> > >       
> > > > bash (env0)
> > > >   yast2 (env0.1)
> > > >     yast2-doSomething (env0.1.1)
> > > >   zypper (env0.2)
> > > >         
> > you as user in bash modify env0, yast will only have access to env0.1 (not a 
> > problem of yast, it's the way process spawning deals with environments)
> >     
>
> Just a very simple example showing you that this is not possible:
> create a bash script like:
>
> ---- snip ----
> #!/bin/bash
> echo Testvar has value $testvar
> unset testvar
> echo Testvar has value $testvar
>
> ---- snip ----
>
> No in your bash:
>   
> > export testvar="Test data"
> > sh myscript.sh
> > echo Testvar has value $testvar
> >     
>
> Testvar has value Test data
> Testvar has value
> Testvar has value Test Data
>
> (the first two echos come from the script.. so it inherited testvar from your 
> bash. it unsets the variable afterwards and you can confirm this with
> the echo which does no longer have a value.
> As soon as the script is over, you get back to your console where you can 
> verify that the changed variable is not given back to the parent shell.
>
> I hope this helps to show the way environments are handled.
>
> Dominique
>
>
>
>
>
>
>   
Ok I think I have the idea, I turned off proxy in yast logged into tty2
as root and the variable was not set, I turned on proxy in yast and
variable was still not set in tty2, I logged out of tty and then in
again and the variable was set. From this I conclude I should only use
environment variables in programs for static things and rather use a
config file for things that might need to be changed on the fly. Logging
out and in to a console is easy but a pain with a gui. I suppose I will
just have to control my speed by changing squid.conf and restarting
squid as I have for a while now. Thanks for your patience with me.
Regards
Dave P

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