31 lines · cpp
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-exception6//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_DECL31