Function deserializeLinuxIDMapping

internal/userns/idmap.go:159–175

deserializeLinuxIDMapping unmarshals a string to a LinuxIDMapping object

(str string)

// deserializeLinuxIDMapping unmarshals a string to a LinuxIDMapping object
func deserializeLinuxIDMapping(str string) (specs.LinuxIDMapping, error) {
	var (
		hostID, ctrID, length int64
	)
	_, err := fmt.Sscanf(str, "%d:%d:%d", &ctrID, &hostID, &length)
	if err != nil {
		return specs.LinuxIDMapping{}, fmt.Errorf("input value %s unparsable: %w", str, err)
	}
	if ctrID < 0 || ctrID >= invalidID || hostID < 0 || hostID >= invalidID || length < 0 || length >= invalidID {
		return specs.LinuxIDMapping{}, fmt.Errorf("invalid mapping \"%s\"", str)
	}
	return specs.LinuxIDMapping{
		ContainerID: uint32(ctrID),
		HostID:      uint32(hostID),
		Size:        uint32(length),
	}, nil
}