Function detachLoopDevice

tests/dmflakey/loopback.go:66–74

detachLoopDevice disassociates the loop device from any backing file. REF: https://man7.org/linux/man-pages/man4/loop.4.html

(loopDevice string)

//
// REF: https://man7.org/linux/man-pages/man4/loop.4.html
func detachLoopDevice(loopDevice string) error {
	loopFd, err := os.Open(loopDevice)
	if err != nil {
		return fmt.Errorf("failed to open loop %s: %w", loopDevice, err)
	}
	defer loopFd.Close()

	return unix.IoctlSetInt(int(loopFd.Fd()), unix.LOOP_CLR_FD, 0)
}

// getFreeLoopDevice allocates or finds a free loop device for use.
//