38 lines · cpp
1//===-- Linux implementation of faccessat ---------------------------------===//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/faccessat.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, faccessat,22 (int fd, const char *path, int amode, int flag)) {23#ifdef SYS_faccessat224 int ret =25 LIBC_NAMESPACE::syscall_impl<int>(SYS_faccessat2, fd, path, amode, flag);26#else27#error "faccessat2 syscall is not available."28#endif29 30 if (ret < 0) {31 libc_errno = -ret;32 return -1;33 }34 return 0;35}36 37} // namespace LIBC_NAMESPACE_DECL38