system

Documentation

Overview

system contains low-level functions and classes for interacting with the base OS

Index

• Constants
• Variables
• type Initializer
  • func (c *Initializer) Init() error
• type Mount
  • func (m Mount) Mount() error
• type MountType
• type NamespacingExecer
  • func (e *NamespacingExecer) Exec(binPath string, args ...string) (int, error)
• type ProcessReaper
  • func StartReaper(logger lager.Logger, waitSyscall Wait4Func) *ProcessReaper
  • func (p *ProcessReaper) Start(cmd *exec.Cmd) error
  • func (p *ProcessReaper) Stop()
  • func (p *ProcessReaper) Wait(cmd *exec.Cmd) byte
• type RootFS
  • func (r *RootFS) Enter() error
• type StepRunner
• type Unmount
  • func (u Unmount) Unmount() error
• type Wait4Func

Constants

const (
	Tmpfs  MountType = "tmpfs"
	Proc             = "proc"
	Devpts           = "devpts"
	Bind             = "bind"
	Sys              = "sysfs"
)

const UIDMappingRange = 65536

Variables

var KrPty krPty = 0

Types

type Initializer

type Initializer struct {
	Steps []StepRunner
}

func (*Initializer) Init

func (c *Initializer) Init() error

type Mount

type Mount struct {
	Type       MountType
	SourcePath string
	TargetPath string
	Flags      int
	Data       string
}

func (Mount) Mount

func (m Mount) Mount() error

type MountType

type MountType string

type NamespacingExecer

type NamespacingExecer struct {
	CommandRunner command_runner.CommandRunner
	ExtraFiles    []*os.File
	Privileged    bool

	// When User Namespaces are enabled, maps 1-MaxUID-1 UIDS, and
	// maps container root (0) to MaxUID
	MaxUID int
}

func (*NamespacingExecer) Exec

func (e *NamespacingExecer) Exec(binPath string, args ...string) (int, error)

type ProcessReaper

type ProcessReaper struct {
	// contains filtered or unexported fields
}

func StartReaper

func StartReaper(logger lager.Logger, waitSyscall Wait4Func) *ProcessReaper

func (*ProcessReaper) Start

func (p *ProcessReaper) Start(cmd *exec.Cmd) error

func (*ProcessReaper) Stop

func (p *ProcessReaper) Stop()

func (*ProcessReaper) Wait

func (p *ProcessReaper) Wait(cmd *exec.Cmd) byte

type RootFS

type RootFS struct {
	Root string
}

func (*RootFS) Enter

func (r *RootFS) Enter() error

type StepRunner

type StepRunner interface {
	Run() error
}

type Unmount

type Unmount struct {
	Dir string
}

func (Unmount) Unmount

func (u Unmount) Unmount() error

type Wait4Func

type Wait4Func func(pid int, wstatus *syscall.WaitStatus, options int, rusage *syscall.Rusage) (wpid int, err error)