vendor/rustix/src/imp/linux_raw/rand/syscalls.rs

   1 //! linux_raw syscalls supporting `rustix::rand`.
   2 //!
   3 //! # Safety
   4 //!
   5 //! See the `rustix::imp` module documentation for details.
   6 #![allow(unsafe_code)]
   7 #![allow(clippy::undocumented_unsafe_blocks)]
   8
   9 use super::super::conv::{ret_usize, slice_mut};
  10 use crate::io;
  11 use crate::rand::GetRandomFlags;
  12
  13 #[inline]
  14 pub(crate) fn getrandom(buf: &mut [u8], flags: GetRandomFlags) -> io::Result<usize> {
  15     let (buf_addr_mut, buf_len) = slice_mut(buf);
  16     unsafe { ret_usize(syscall!(__NR_getrandom, buf_addr_mut, buf_len, flags)) }
  17 }