GetOpenFds returns the number of open fds for the process provided by pid.

GetSubreaper returns the subreaper setting for the calling process.

Reap reaps all child processes for the calling process and returns their exit information.

SetPDeathSig sets the parent death signal to SIGKILL so that if the shim dies the container process also dies.

SetSubreaper sets the value i as the subreaper setting for the calling process.

Exit is the wait4 information from an exited process.