Function linux_sys_getrandom

pub unsafe fn linux_sys_getrandom(
    buffer: *mut u8,
    size: usize,
    flags: c_uint,
) -> isize ⓘ

Available on crate features unsafe_syscall and linux only.

Expand description

Performs a getrandom syscall.

Obtain a series of random bytes.

§Info

use devela::linux_sys_getrandom;

let mut r = 0u8;
unsafe { linux_sys_getrandom(&mut r as *mut u8, 1, 0) };

GRND_RANDOM = 0x001

Use the /dev/random (blocking) source instead of the /dev/urandom (non-blocking) source to obtain randomness.

If this flag is specified, the call may block, potentially for quite some time, even after the randomness source has been initialized. If it is not specified, the call can only block when the system has just booted and the randomness source has not yet been initialized.
GRND_NONBLOCK = 0x002

Instead of blocking, return to the caller immediately if no data is available.
GRND_INSECURE = 0x0004

Write random data that may not be cryptographically secure.

TODO