}

	if _, err := Write(fd, data); err != nil {
		Close(fd)
		return err
	}

	return Close(fd)
}

// writeUidGidMappings writes User ID and Group ID mappings for user namespaces
// for a process and it is called from the parent process.
func writeUidGidMappings(pid int, sys *SysProcAttr) error {
	if sys.UidMappings != nil {
		uidf := "/proc/" + itoa.Itoa(pid) + "/uid_map"