github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/syscalls/linux/fsync.cc (about) 1 // Copyright 2018 The gVisor Authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include <fcntl.h> 16 #include <stdio.h> 17 #include <unistd.h> 18 19 #include <string> 20 21 #include "gtest/gtest.h" 22 #include "test/util/file_descriptor.h" 23 #include "test/util/temp_path.h" 24 #include "test/util/test_util.h" 25 26 namespace gvisor { 27 namespace testing { 28 29 namespace { 30 31 TEST(FsyncTest, TempFileSucceeds) { 32 auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); 33 auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDWR, 0666)); 34 const std::string data = "some data to sync"; 35 EXPECT_THAT(write(fd.get(), data.c_str(), data.size()), 36 SyscallSucceedsWithValue(data.size())); 37 EXPECT_THAT(fsync(fd.get()), SyscallSucceeds()); 38 } 39 40 TEST(FsyncTest, TempDirSucceeds) { 41 auto dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); 42 auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(dir.path(), O_RDONLY | O_DIRECTORY)); 43 EXPECT_THAT(fsync(fd.get()), SyscallSucceeds()); 44 } 45 46 TEST(FsyncTest, CannotFsyncOnUnopenedFd) { 47 auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); 48 int fd; 49 ASSERT_THAT(fd = open(file.path().c_str(), O_RDONLY), SyscallSucceeds()); 50 ASSERT_THAT(close(fd), SyscallSucceeds()); 51 52 // fd is now invalid. 53 EXPECT_THAT(fsync(fd), SyscallFailsWithErrno(EBADF)); 54 } 55 } // namespace 56 57 } // namespace testing 58 } // namespace gvisor