1//===---------- Linux implementation of the shm_open function -------------===//
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/mman/shm_open.h"
10#include "hdr/fcntl_macros.h"
11#include "hdr/types/mode_t.h"
12#include "src/__support/OSUtil/fcntl.h"
13#include "src/__support/macros/config.h"
14#include "src/sys/mman/linux/shm_common.h"
15
16namespace LIBC_NAMESPACE_DECL {
17
18static constexpr int DEFAULT_OFLAGS = O_NOFOLLOW | O_CLOEXEC | O_NONBLOCK;
19
20LLVM_LIBC_FUNCTION(int, shm_open, (const char *name, int oflags, mode_t mode)) {
21 if (cpp::optional<shm_common::SHMPath> buffer =
22 shm_common::translate_name(name)) {
23 auto result = internal::open(buffer->data(), oflags | DEFAULT_OFLAGS, mode);
24
25 if (!result.has_value()) {
26 libc_errno = result.error();
27 return -1;
28 }
29 return result.value();
30 }
31 return -1;
32}
33
34} // namespace LIBC_NAMESPACE_DECL
35

source code of libc/src/sys/mman/linux/shm_open.cpp