Originally, I tried using similar tools (I think I used chrpath, I can't remember whether I tried patchelf) to implement whack, but I found it quite time-consum

Originally, I tried using similar tools (I think I used chrpath, I can't remember whether I tried patchelf) to implement whack, but I found it quite time-consuming to get things working, and had limited success. I chose the current implementation since it was simpler, quicker and more reliable, and the setuid requirement wasn't a problem for my particular use case. Having said that, it would be great to have an implementation that didn't require setuid/root.