Dear Janne, Sorry I'm a bit late on this, but since async-signal-safe code is so hard to get right (at least for me), I wanted to help review your new code. It's very nice to have this instead of my initial ugly implementation, and I have only spotted on issue: AFAICT, execvp() is not safe to use here; only execle() and execve() are.
Cheers! FX
