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//===-- Linux implementation of dup3 --------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/unistd/dup3.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/common.h"
#include "src/errno/libc_errno.h"
#include <sys/syscall.h> // For syscall numbers.
namespace LIBC_NAMESPACE {
LLVM_LIBC_FUNCTION(int, dup3, (int oldfd, int newfd, int flags)) {
// If dup2 syscall is available, we make use of directly.
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_dup3, oldfd, newfd, flags);
if (ret >= 0)
return ret;
libc_errno = -ret;
return -1;
}
} // namespace LIBC_NAMESPACE
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