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Diffstat (limited to 'getrandom/src/linux_android.rs')
-rw-r--r-- | getrandom/src/linux_android.rs | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/getrandom/src/linux_android.rs b/getrandom/src/linux_android.rs deleted file mode 100644 index a29feb5..0000000 --- a/getrandom/src/linux_android.rs +++ /dev/null @@ -1,44 +0,0 @@ -// Copyright 2018 Developers of the Rand project. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! Implementation for Linux / Android -use crate::util::LazyBool; -use crate::util_libc::{last_os_error, sys_fill_exact}; -use crate::{use_file, Error}; - -pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> { - static HAS_GETRANDOM: LazyBool = LazyBool::new(); - if HAS_GETRANDOM.unsync_init(is_getrandom_available) { - sys_fill_exact(dest, |buf| unsafe { - getrandom(buf.as_mut_ptr() as *mut libc::c_void, buf.len(), 0) - }) - } else { - use_file::getrandom_inner(dest) - } -} - -fn is_getrandom_available() -> bool { - let res = unsafe { getrandom(core::ptr::null_mut(), 0, libc::GRND_NONBLOCK) }; - if res < 0 { - match last_os_error().raw_os_error() { - Some(libc::ENOSYS) => false, // No kernel support - Some(libc::EPERM) => false, // Blocked by seccomp - _ => true, - } - } else { - true - } -} - -unsafe fn getrandom( - buf: *mut libc::c_void, - buflen: libc::size_t, - flags: libc::c_uint, -) -> libc::ssize_t { - libc::syscall(libc::SYS_getrandom, buf, buflen, flags) as libc::ssize_t -} |