pub fn birth_identity(pidfd: &OwnedFd) -> Option<u64>Expand description
A process’s birth identity: the inode number of a pidfd for it, when that
is a pidfs inode (Linux 6.9 and later), which is one per process and never
reused while the kernel runs. Before pidfs every pidfd shares one
anonymous inode, which names no process, so there is none. Every pidfd for
the same process has the same inode, however it was obtained
(pidfd_open, SO_PEERPIDFD, CLONE_PIDFD).