39 lines · cpp
1//===-- Linux implementation of access ------------------------------------===//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/unistd/access.h"10 11#include "src/__support/OSUtil/syscall.h" // For internal syscall function.12#include "src/__support/common.h"13 14#include "hdr/fcntl_macros.h"15#include "src/__support/libc_errno.h"16#include "src/__support/macros/config.h"17#include <sys/syscall.h> // For syscall numbers.18 19namespace LIBC_NAMESPACE_DECL {20 21LLVM_LIBC_FUNCTION(int, access, (const char *path, int mode)) {22#ifdef SYS_access23 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_access, path, mode);24#elif defined(SYS_faccessat)25 int ret =26 LIBC_NAMESPACE::syscall_impl<int>(SYS_faccessat, AT_FDCWD, path, mode);27#else28#error "access and faccessat syscalls not available."29#endif30 31 if (ret < 0) {32 libc_errno = -ret;33 return -1;34 }35 return 0;36}37 38} // namespace LIBC_NAMESPACE_DECL39