Re: Linux 5.3 Released

On Mon, 16 Sep 2019 11:57:30 +1200, Peter Reutemann quoted:

> '... a new pidfd_open(2) system call that completes the work done
> to let users deal with the PID reuse problem ...'

That’s a fun one. There has always been the possibility on Unix/POSIX
systems of confusing one process for another, if the first one exits,
and then so many process creations happen in the meantime that the
entire PID space goes through a full cycle and so the PID for that one
gets reused for another one. I thought it would be hard to do, but
clearly it’s not impossible.

So now Linux has added a set of calls to extend the good old
“everything is a file” concept to processes as well.
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