Doesn't anybody build from source anymore? (Score 1)

It's called unexec(). It's been around for a decade and a half; just google for it.

To be fair, it's only 98% of what you need. The other 1.8% you can get by poking around in /proc/{pid} and reading the state of open file descriptors.

Golly. And people wonder why the bubble finally burst.