1 files changed, 31 insertions, 0 deletions
diff --git a/vendor/getrandom/src/backends/getrandom.rs b/vendor/getrandom/src/backends/getrandom.rs
new file mode 100644
index 00000000..27d5a1f5
--- /dev/null
+++ b/vendor/getrandom/src/backends/getrandom.rs
@@ -0,0 +1,31 @@
+//! Implementation using getrandom(2).
+//!
+//! Available since:
+//!   - Linux Kernel 3.17, Glibc 2.25, Musl 1.1.20
+//!   - Android API level 23 (Marshmallow)
+//!   - NetBSD 10.0
+//!   - FreeBSD 12.0
+//!   - illumos since Dec 2018
+//!   - DragonFly 5.7
+//!   - Hurd Glibc 2.31
+//!   - shim-3ds since Feb 2022
+//!
+//! For these platforms, we always use the default pool and never set the
+//! GRND_RANDOM flag to use the /dev/random pool. On Linux/Android/Hurd, using
+//! GRND_RANDOM is not recommended. On NetBSD/FreeBSD/Dragonfly/3ds, it does
+//! nothing. On illumos, the default pool is used to implement getentropy(2),
+//! so we assume it is acceptable here.
+use crate::Error;
+use core::mem::MaybeUninit;
+
+pub use crate::util::{inner_u32, inner_u64};
+
+#[path = "../util_libc.rs"]
+mod util_libc;
+
+#[inline]
+pub fn fill_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
+    util_libc::sys_fill_exact(dest, |buf| unsafe {
+        libc::getrandom(buf.as_mut_ptr().cast(), buf.len(), 0)
+    })
+}