[fpc-pascal] Help getting Lazarus app in Ubuntu to elevate to root and back again

[Andrew Brunner]

On Sun, Oct 10, 2010 at 1:09 PM, Mark Morgan Lloyd
<markMLl.fpc-pascal at telemetry.co.uk> wrote:
> Could you suid it to root or to an appropriate group? I've not tried this
> for a Pascal/Lazarus program and don't know what the precise rules are for
> port usage (i.e. whether the user has to be root or using the root group is
> sufficient), but for a C program accessing a video capture device I use
>
>  chown root:video v4lgrab
>  chmod g+s v4lgrab
>
> That then allows the program to be run as part of an unprivileged CGI
> script.

I'm presently using gksu ./startlazarus.  Though it would be nice if I could use
gksu -u myusername ./startlazarus and then have the fpSetUID(0) not
fail on me.  I made the assumption that gksu would startup lazarus
under myusername and not fail any attempts for me to use the setgid or
uid to root (because I did use gksu to launch the app).  This would
have been an ideal solution.  But there needs to be one library out
there that solves this.

Presently I am just using root :-(  Which means it's working but I'm
forced to use the root account for my Lazarus instance.