sys

Documentation

Overview

Package sys provides access to the Get Child and Set Child prctl flags. See http://man7.org/linux/man-pages/man2/prctl.2.html

Index

• Constants
• func CreateUnixSocket(path string) (net.Listener, error)
• func EpollCreate1(flag int) (int, error)
• func EpollCtl(epfd int, op int, fd int, event *unix.EpollEvent) error
• func EpollWait(epfd int, events []unix.EpollEvent, msec int) (int, error)
• func GetLocalListener(path string, uid, gid int) (net.Listener, error)
• func GetOpenFds(pid int) (int, error)
• func GetSubreaper() (int, error)
• func GetSystemCPUUsage() (uint64, error)
• func SetOOMScore(pid, score int) error
• func SetSubreaper(i int) error
• func StatAtime(st *syscall.Stat_t) syscall.Timespec
• func StatCtime(st *syscall.Stat_t) syscall.Timespec
• func StatMtime(st *syscall.Stat_t) syscall.Timespec
• type Exit
  • func Reap(wait bool) (exits []Exit, err error)

Constants

const OOMScoreMaxKillable = -999

OOMScoreMaxKillable is the maximum score keeping the process killable by the oom killer

Functions

func CreateUnixSocket

func CreateUnixSocket(path string) (net.Listener, error)

CreateUnixSocket creates a unix socket and returns the listener

func EpollCreate1

func EpollCreate1(flag int) (int, error)

EpollCreate1 directly calls unix.EpollCreate1

func EpollCtl

func EpollCtl(epfd int, op int, fd int, event *unix.EpollEvent) error

EpollCtl directly calls unix.EpollCtl

func EpollWait

func EpollWait(epfd int, events []unix.EpollEvent, msec int) (int, error)

EpollWait directly calls unix.EpollWait

func GetLocalListener

func GetLocalListener(path string, uid, gid int) (net.Listener, error)

GetLocalListener returns a listerner out of a unix socket.

func GetOpenFds

func GetOpenFds(pid int) (int, error)

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

func GetSubreaper

func GetSubreaper() (int, error)

GetSubreaper returns the subreaper setting for the calling process

func GetSystemCPUUsage

func GetSystemCPUUsage() (uint64, error)

GetSystemCPUUsage returns the host system's cpu usage in nanoseconds. An error is returned if the format of the underlying file does not match.

Uses /proc/stat defined by POSIX. Looks for the cpu statistics line and then sums up the first seven fields provided. See `man 5 proc` for details on specific field information.

func SetOOMScore

func SetOOMScore(pid, score int) error

SetOOMScore sets the oom score for the provided pid

func SetSubreaper

func SetSubreaper(i int) error

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

func StatAtime

func StatAtime(st *syscall.Stat_t) syscall.Timespec

func StatCtime

func StatCtime(st *syscall.Stat_t) syscall.Timespec

func StatMtime

func StatMtime(st *syscall.Stat_t) syscall.Timespec

Types

type Exit

type Exit struct {
	Pid    int
	Status int
}

Exit is the wait4 information from an exited process

func Reap

func Reap(wait bool) (exits []Exit, err error)

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