ClearRlimitNofileCache clears go runtime's nofile rlimit cache.

Copy is like io.Copy except it uses sendfile(2) if the source and sink are both (*os.File) as an optimisation to make copies faster.

GetSubreaper returns the subreaper setting for the calling process.

SetLinuxPersonality sets the Linux execution personality.

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

Stat returns a Stat_t instance for the specified process.

Stat_t represents the information from /proc/[pid]/stat, as described in proc(5) with names based on the /proc/[pid]/status fields.

State is the status of a process.