GRND_NONBLOCK
#if defined(SYS_getrandom) && defined(GRND_NONBLOCK)
ret = syscall(SYS_getrandom, buf, len, GRND_NONBLOCK);
#if defined(SYS_getrandom) && defined(GRND_NONBLOCK)
#if defined(SYS_getrandom) && defined(GRND_NONBLOCK)
const unsigned int getrandomFlags = GRND_NONBLOCK;
# if ! defined(GRND_NONBLOCK)