Command returns *exec.Cmd which has Path as current binary. Also it setting SysProcAttr.Pdeathsig to SIGTERM. This will use the in-memory version (/proc/self/exe) of the current binary, it is thus safe to delete or replace the on-disk binary (os.Args).
Init is called as the first part of the exec process and returns true if an initialization function was called.
Register adds an initialization func under the specified name
Self returns the path to the current process's binary. Returns "/proc/self/exe".