//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // <fstream> // basic_filebuf<charT,traits>* close(); #include <fstream> #include <cassert> #if defined(__unix__) #include <fcntl.h> #include <unistd.h> #endif #include "test_macros.h" #include "platform_support.h" int main(int, char**) { std::string temp = get_temp_file_name(); { std::filebuf f; assert(!f.is_open()); assert(f.open(temp.c_str(), std::ios_base::out) != 0); assert(f.is_open()); assert(f.close() != nullptr); assert(!f.is_open()); assert(f.close() == nullptr); assert(!f.is_open()); } #if defined(__unix__) { std::filebuf f; assert(!f.is_open()); // Use open directly to get the file descriptor. int fd = open(temp.c_str(), O_RDWR); assert(fd >= 0); // Use the internal method to create filebuf from the file descriptor. assert(f.__open(fd, std::ios_base::out) != 0); assert(f.is_open()); // Close the file descriptor directly to force filebuf::close to fail. assert(close(fd) == 0); // Ensure that filebuf::close handles the failure. assert(f.close() == nullptr); assert(!f.is_open()); assert(f.close() == nullptr); } #endif std::remove(temp.c_str()); return 0; }