permission

In this vehicle script, is there a way to give permissions to any agent to drive, without them being the owner?

changed(integer change)
{
if (change & CHANGED_LINK)
{
key agent = llAvatarOnSitTarget();
if (agent)
{
if (agent != llGetOwner())
{
llSay(0, "You aren't the owner";
llUnSit(agent);
llPushObject(agent, <0,0,100>, ZERO_VECTOR, FALSE);
}
else
{
// You sit and are owner so get controls
llSetStatus(STATUS_PHYSICS, TRUE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, TRUE);
llRequestPermissions(agent,PERMISSION_TAKE_CONTROLS);
}
}
else
{
// You stand so boat stops
llMessageLinked(LINK_ALL_CHILDREN, 0, "stop", NULL_KEY);
llSetStatus(STATUS_PHYSICS, FALSE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, FALSE);
llReleaseControls();
llStopSound();
llSetTimerEvent(0.0);
}
}

}

run_time_permissions(integer perm)
{
if (perm)
{
// Take these controls and lets go
llTakeControls(CONTROL_FWD | CONTROL_BACK | CONTROL_RIGHT | CONTROL_LEFT | CONTROL_ROT_RIGHT | CONTROL_ROT_LEFT | CONTROL_UP | CONTROL_DOWN, TRUE, FALSE);

Simply change this part:

if (agent)
{
if (agent != llGetOwner())
{
llSay(0, "You aren't the owner");
llUnSit(agent);
llPushObject(agent, <0,0,100>, ZERO_VECTOR, FALSE);
}
else
{
// You sit and are owner so get controls
llSetStatus(STATUS_PHYSICS, TRUE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, TRUE);
llRequestPermissions(agent,PERMISSION_TAKE_CONTROL S);
}
}

to this:

if (agent)
{
// You sit and are owner so get controls
llSetStatus(STATUS_PHYSICS, TRUE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, TRUE);
llRequestPermissions(agent,PERMISSION_TAKE_CONTROL S);
}

comment out the line if(agent!=llGetOwner()) and the following span (llUnsit() and the push), that will then run straight through into setting up perms. It will, however, allow anyone to drive it.

If you want it more restrictive than that it gets a bit more complicated. You need the if(agent != llGetOwner()) line back in, and some method to prompt the owner to give permission when appropriate. There are lots of ways around that - one of the commonest is to have multiple seats and allow anyone to drive as long as the owner is actually on the vehicle - but that's no good for 1 seaters. The other is to set a "guest driver" and set their name, or key, in a particular place (description field of the seat prim for example) and check if that matches with the name/key of the avatar as appropriate.

Thank you.