35 lines · cpp
1//===-- Linux implementation of remove ------------------------------------===//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/stdio/remove.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" // For AT_* macros.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, remove, (const char *path)) {22 // We first try unlinking it as a file. If it is ia file, it will succeed. If23 // it fails with EISDIR, we will try unlinking it as a directory.24 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, AT_FDCWD, path, 0);25 if (ret == -EISDIR)26 ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, AT_FDCWD, path,27 AT_REMOVEDIR);28 if (ret >= 0)29 return 0;30 libc_errno = -ret;31 return -1;32}33 34} // namespace LIBC_NAMESPACE_DECL35