loopdev

package

v1.10.0 Latest Latest Go to latest Published: May 29, 2026 License: Apache-2.0 Imports: 7 Imported by: 0

Details

Package loopdev provides a thin wrapper around Linux loop device ioctls, using golang.org/x/sys/unix instead of external dependencies.

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

Attacher implements iface.LoopAttacher using Linux ioctls.

func NewAttacher() *Attacher

NewAttacher returns an Attacher using real system calls.

func (a *Attacher) Attach(backingFile string, offset uint64, readOnly bool) (iface.LoopDevice, error)

Attach opens the backing file, finds a free loop device, and attaches the file to that device with the given offset and read-only flag.

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

Device represents an attached loop device, implementing iface.LoopDevice.

func (d *Device) Detach() error

Detach removes the association between the loop device and its backing file.

func (d *Device) Path() string

Path returns the path of the loop device (e.g., "/dev/loop0").

func (d *Device) SetAutoclear() error

SetAutoclear sets the LO_FLAGS_AUTOCLEAR flag on the loop device so the kernel automatically detaches when the last reference is dropped.