Try this:
function logPlayerPos( player )
local x,y,z = getElementPosition( player )
outputServerLog ( "Position (x,y,z) => " .. x .. " , " .. y .. " , " .. z)
outputChatBox ( "Your Position (x,y,z) => " .. x .. " , " .. y .. " , " .. z, player)
end
addCommandHandler ( "savepos", logPlayerPos)
This will log your current position to \server\mods\deathmatch\logs\server.log