You'd have to access the stack frame above `main` and then treat some of the bytes within that frame as your env. This means forging pointers/bounds based on th

You'd have to access the stack frame above `main` and then treat some of the bytes within that frame as your env. This means forging pointers/bounds based on the inputs. `execve` basically sets that up for you but Rust doesn't know about that. Then if you wanted to handle dynamically set environment variables you'll need to call into your libc implementation, which crosses an ffi boundary, which means rust doesn't know about what that code is doing and therefor it requires `unsafe`. edit: Question for others - is main a separate stackframe? I actually don't recall.