1//===-- Linux implementation of getrandom ---------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/sys/random/getrandom.h"
10
11#include "src/__support/OSUtil/linux/getrandom.h"
12#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
13#include "src/__support/common.h"
14#include "src/__support/error_or.h"
15#include "src/__support/libc_errno.h"
16#include "src/__support/macros/config.h"
17
18namespace LIBC_NAMESPACE_DECL {
19
20LLVM_LIBC_FUNCTION(ssize_t, getrandom,
21 (void *buf, size_t buflen, unsigned int flags)) {
22 auto rand = internal::getrandom(buf, buflen, flags);
23 if (!rand.has_value()) {
24 libc_errno = static_cast<int>(rand.error());
25 return -1;
26 }
27 return rand.value();
28}
29
30} // namespace LIBC_NAMESPACE_DECL
31

source code of libc/src/sys/random/linux/getrandom.cpp