// Copyright 2018 The gVisor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include <errno.h> #include <fcntl.h> #include <sys/socket.h> #include <sys/types.h> #include <unistd.h> #include "gtest/gtest.h" #include "gtest/gtest.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { // This test is currently very rudimentary. // // TODO(edahlgren): // * bad buffer states (EFAULT). // * bad fds (wrong permission, wrong type of file, EBADF). // * check offset is not incremented. // * check for EOF. // * writing to pipes, symlinks, special files. class Pwrite64 : public ::testing::Test { void SetUp() override { name_ = NewTempAbsPath(); int fd; ASSERT_THAT(fd = open(name_.c_str(), O_CREAT, 0644), SyscallSucceeds()); EXPECT_THAT(close(fd), SyscallSucceeds()); } void TearDown() override { unlink(name_.c_str()); } public: std::string name_; }; TEST_F(Pwrite64, AppendOnly) { int fd; ASSERT_THAT(fd = open(name_.c_str(), O_APPEND | O_RDWR), SyscallSucceeds()); constexpr int64_t kBufSize = 1024; std::vector<char> buf(kBufSize); std::fill(buf.begin(), buf.end(), 'a'); EXPECT_THAT(PwriteFd(fd, buf.data(), buf.size(), 0), SyscallSucceedsWithValue(buf.size())); EXPECT_THAT(lseek(fd, 0, SEEK_CUR), SyscallSucceedsWithValue(0)); EXPECT_THAT(close(fd), SyscallSucceeds()); } TEST_F(Pwrite64, InvalidArgs) { int fd; ASSERT_THAT(fd = open(name_.c_str(), O_APPEND | O_RDWR), SyscallSucceeds()); constexpr int64_t kBufSize = 1024; std::vector<char> buf(kBufSize); std::fill(buf.begin(), buf.end(), 'a'); EXPECT_THAT(PwriteFd(fd, buf.data(), buf.size(), -1), SyscallFailsWithErrno(EINVAL)); EXPECT_THAT(close(fd), SyscallSucceeds()); } } // namespace } // namespace testing } // namespace gvisor