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.

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

Return the "child subreaper" setting of the caller, in the location pointed to by (int *) arg2.

If arg2 is nonzero, set the "child subreaper" attribute of the calling process; if arg2 is zero, unset the attribute.

Exit is the wait4 information from an exited process.