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