tri fold shower door broke

I assume you have the three panel sliding doors with a screen door like latch. Ours would never stay latched so I drilled a small hole through the upper track rail and bought a pin with a head and on the other end there is a small protrusion which we turn downward and I made a notch on the top of the hole in the upper bar to admit the protrusion. No problems since. Be sure to miss the glass with the drill.