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// 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 "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
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