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//! libc syscalls supporting `rustix::rand`.
#[cfg(linux_kernel)]
use {crate::backend::c, crate::backend::conv::ret_usize, crate::io, crate::rand::GetRandomFlags};
#[cfg(linux_kernel)]
pub(crate) unsafe fn getrandom(
buf: *mut u8,
cap: usize,
flags: GetRandomFlags,
) -> io::Result<usize> {
// `getrandom` wasn't supported in glibc until 2.25.
weak_or_syscall! {
fn getrandom(buf: *mut c::c_void, buflen: c::size_t, flags: c::c_uint) via SYS_getrandom -> c::ssize_t
}
ret_usize(getrandom(buf.cast(), cap, flags.bits()))
}