libc/src/sys/mman/linux/shm_open.cpp

   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/types/mode_t.h"
  11 #include "src/__support/macros/config.h"
  12 #include "src/fcntl/open.h"
  13 #include "src/sys/mman/linux/shm_common.h"
  14
  15 namespace LIBC_NAMESPACE_DECL {
  16
  17 static constexpr int DEFAULT_OFLAGS = O_NOFOLLOW | O_CLOEXEC | O_NONBLOCK;
  18
  19 LLVM_LIBC_FUNCTION(int, shm_open, (const char *name, int oflags, mode_t mode)) {
  20   using namespace shm_common;
  21   if (cpp::optional<SHMPath> buffer = translate_name(name))
  22     return open(buffer->data(), oflags | DEFAULT_OFLAGS, mode);
  23   return -1;
  24 }
  25
  26 } // namespace LIBC_NAMESPACE_DECL