On Mon, 13 Sep 2004, Jan Nieuwenhuizen wrote:
> Igor Pechtchanski writes:
>
> > Not really. As Max said, the environment in which the postinstall scripts
> > run is the same as the one you'd get when you run them on the command line
> > (albeit from a non-login /bin/sh). That environment will contain all of
> > the Windows-set environment variables. If the tools require that some
> > variables be unset (because they might throw the tools off, for example),
> > the variables have to be unset in the postinstall script -- setup.exe
> > can't be expected to know all of the variables potentially conflicting
> > with all of the packages.
>
> No, of course. That's why I'd like to have an empty (rather than a
> cleaned) environment, isn't that possible? That sounds cleaner than
> fixing all scripts?
Most scripts don't need an empty environment.
> FWIW, the way teTeX works, most variables set in texmf.cnf are
> overridden by the environment; it would be next to impossible to
> guarantee a successful teTeX environment after logging in if variables
> from the WINDOWS are allowed to silently enter the Cygwin
> environment...
Well, if you install teTeX with an empty environment, and then attempt to
run it from a user shell (which *will* inherit the Windows settings),
wouldn't it still be broken?
(Yes, you can play games with /etc/profile.d scripts, but that can only
take you so far...)
BTW, as CGF said, you can't have a completely empty environment, or
Cygwin won't work. I recall there was a thread a while ago about patching
"env -i" to keep some of the necessary variables, but I just checked env
on my system, and looks like that thread didn't result in any changes to
sh-utils.
Why not just unset offending variables for now? You can kill anything
starting with "TEX", for example, with something like
eval "`env | sed -n '/^TEX/s/=.*$/=/ p'`"
HTH,
Igor
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