bootloader

Documentation

Index

• Constants
• type ADV
  • func NewADV(r io.ReadSeeker) (adv ADV, err error)
  • func (a ADV) DeleteTag(t uint8) (ok bool)
  • func (a ADV) ReadTag(t uint8) (val string, ok bool)
  • func (a ADV) SetTag(t uint8, val string) (ok bool)
• type Bootloader
• type Meta
  • func NewMeta() (meta *Meta, err error)
  • func (m *Meta) Read(b []byte) (int, error)
  • func (m *Meta) Revert() (err error)
  • func (m *Meta) Write() (int, error)

Constants

const (
	// AdvSize is the total size.
	AdvSize = 512
	// AdvLen is the usable data size.
	AdvLen = AdvSize - 3*4
	// AdvMagic1 is the head signature.
	AdvMagic1 = uint32(0x5a2d2fa5)
	// AdvMagic2 is the total checksum.
	AdvMagic2 = uint32(0xa3041767)
	// AdvMagic3 is the tail signature.
	AdvMagic3 = uint32(0xdd28bf64)
)

const (
	// AdvEnd is the noop tag.
	AdvEnd = iota
	// AdvBootonce is the bootonce tag.
	AdvBootonce
	// AdvMenusave is the menusave tag.
	AdvMenusave
	// AdvReserved1 is a reserved tag.
	AdvReserved1
	// AdvReserved2 is a reserved tag.
	AdvReserved2
	// AdvReserved3 is a reserved tag.
	AdvReserved3
	// AdvUpgrade is the upgrade tag.
	AdvUpgrade
)

Types

type ADV

type ADV []byte

ADV represents the Syslinux Auxiliary Data Vector.

func NewADV

func NewADV(r io.ReadSeeker) (adv ADV, err error)

NewADV returns the Auxiliary Data Vector.

func (ADV) DeleteTag

func (a ADV) DeleteTag(t uint8) (ok bool)

DeleteTag deletes a tag in the ADV.

func (ADV) ReadTag

func (a ADV) ReadTag(t uint8) (val string, ok bool)

ReadTag reads a tag in the ADV.

func (ADV) SetTag

func (a ADV) SetTag(t uint8, val string) (ok bool)

SetTag sets a tag in the ADV.

type Bootloader

type Bootloader interface {
	Labels() (string, string, error)
	Install(string, interface{}, runtime.Sequence) error
	Default(string) error
}

Bootloader describes a bootloader.

type Meta

type Meta struct {
	*os.File
	ADV
}

Meta represents the meta reader.

func NewMeta

func NewMeta() (meta *Meta, err error)

NewMeta initializes and returns a `Meta`.

func (*Meta) Read

func (m *Meta) Read(b []byte) (int, error)

func (*Meta) Revert

func (m *Meta) Revert() (err error)

Revert reverts the default bootloader label to the previous installation.

nolint: gocyclo

func (*Meta) Write

func (m *Meta) Write() (int, error)