42 lines · cpp
1//===-- Implementation of open --------------------------------------------===//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/fcntl/open.h"10 11#include "hdr/fcntl_macros.h"12#include "hdr/types/mode_t.h"13#include "src/__support/OSUtil/fcntl.h"14#include "src/__support/common.h"15#include "src/__support/libc_errno.h"16#include "src/__support/macros/config.h"17#include <stdarg.h>18 19namespace LIBC_NAMESPACE_DECL {20 21LLVM_LIBC_FUNCTION(int, open, (const char *path, int flags, ...)) {22 mode_t mode_flags = 0;23 // O_TMPFILE is a multi-bit flag so we test all bits by checking for equality24 // with O_TMPFILE25 if ((flags & O_CREAT) || (flags & O_TMPFILE) == O_TMPFILE) {26 va_list varargs;27 va_start(varargs, flags);28 mode_flags = va_arg(varargs, mode_t);29 va_end(varargs);30 }31 32 auto result = internal::open(path, flags, mode_flags);33 34 if (!result.has_value()) {35 libc_errno = result.error();36 return -1;37 }38 return result.value();39}40 41} // namespace LIBC_NAMESPACE_DECL42