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/*
* libfud
* Copyright 2024 Dominick Allen
*
* 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 "fud_file.hpp"
#include "fud_string.hpp"
#include "fud_vector.hpp"
#include "test_common.hpp"
#include "gtest/gtest.h"
#include <algorithm>
#include <cerrno>
#include <fcntl.h>
#include <ftw.h>
#include <ranges>
namespace fud {
auto rmFile(const auto& filename) -> int
{
auto result = unlink(filename.c_str());
if (result == -1) {
if (errno == ENOENT) {
return 0;
}
}
return result;
}
TEST(FudFile, Basic)
{
constexpr const char* testDirCName = "/tmp/fud_directory_test";
const auto testDirName{String::makeFromCString(testDirCName).takeOkay()};
ASSERT_TRUE(testDirName.utf8Valid());
constexpr mode_t pathMode = 0777;
ASSERT_EQ(removeRecursive(testDirName), FudStatus::Success);
auto mkdirResult = mkdir(testDirName.c_str(), pathMode);
EXPECT_EQ(mkdirResult, 0);
if (mkdirResult != 0) {
ASSERT_EQ(removeRecursive(testDirName), FudStatus::Success);
return;
}
String testName1{String::makeFromCStrings(testDirCName, "/", "test1").takeOkay()};
String testName2{String::makeFromCStrings(testDirCName, "/", "test2").takeOkay()};
ASSERT_EQ(rmFile(testName1), 0);
ASSERT_EQ(rmFile(testName2), 0);
auto fileResult{RegularFile::open(testName1.asView(), FileAccessMode::Read, OpenFlags{}, NullOpt)};
EXPECT_EQ(fileResult.takeErrorOr(FudStatus::Success), FudStatus::NotFound);
/* The irony of the ability for TOCTOU bugs to be present in the test does
* not escape me. */
auto createFile = [](const auto& filename) -> int {
constexpr int allPerms = 0777;
auto handleResult = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, allPerms);
if (handleResult >= 0) {
close(handleResult);
}
return handleResult;
};
ASSERT_GE(createFile(testName1), 0);
fileResult = std::move(RegularFile::open(testName1.asView(), FileAccessMode::Read, OpenFlags{}, NullOpt));
ASSERT_TRUE(fileResult.isOkay());
auto file{fileResult.takeOkay()};
ASSERT_EQ(file.close(), FudStatus::Success);
ASSERT_EQ(rmFile(testName1), 0);
ASSERT_GE(createFile(testName2), 0);
ASSERT_EQ(symlink(testName2.c_str(), testName1.c_str()), 0);
fileResult = RegularFile::open(testName2.asView(), FileAccessMode::Read, OpenFlags{}, NullOpt);
ASSERT_TRUE(fileResult.isOkay());
file = fileResult.takeOkay();
ASSERT_EQ(file.close(), FudStatus::Success);
fileResult = RegularFile::open(testName1.asView(), FileAccessMode::Read, OpenFlags{}, NullOpt);
ASSERT_TRUE(fileResult.isError());
EXPECT_EQ(fileResult.getError(), FudStatus::Failure);
}
TEST(FudBufferedFile, OpenReadWrite)
{
constexpr const char* testDirCName = "/tmp/fud_directory_test";
const auto testDirName{String::makeFromCString(testDirCName).takeOkay()};
ASSERT_TRUE(testDirName.utf8Valid());
constexpr mode_t pathMode = 0777;
ASSERT_EQ(removeRecursive(testDirName), FudStatus::Success);
auto mkdirResult = mkdir(testDirName.c_str(), pathMode);
EXPECT_EQ(mkdirResult, 0);
if (mkdirResult != 0) {
ASSERT_EQ(removeRecursive(testDirName), FudStatus::Success);
return;
}
String testName{String::makeFromCStrings(testDirCName, "/", "test1").takeOkay()};
auto fileResult{RegularFile::create(
testName.asView(),
FileAccessMode::ReadWrite,
OpenFlags{OpenFlagEnum::Truncate},
Permissions{PermReadWrite, PermReadWrite, PermReadWrite},
true,
NullOpt)};
ASSERT_TRUE(fileResult.isOkay());
ASSERT_GT(testName.length(), 8);
auto vectorResult{Vector<std::byte>::withSize(8)};
ASSERT_TRUE(vectorResult.isOkay());
auto bufferedFile{BufferedRegularFile::make(fileResult.takeOkay(), vectorResult.takeOkay())};
ASSERT_EQ(bufferedFile.file().size().getOkayOr(std::numeric_limits<size_t>::max()), 0);
auto writeResult = bufferedFile.write(
reinterpret_cast<const std::byte*>(testName.data()),
testName.size(),
NullOpt);
DrainResult expected{testName.size(), FudStatus::Success};
ASSERT_EQ(writeResult, expected);
DrainResult nullExpected{0, FudStatus::Success};
ASSERT_EQ(bufferedFile.flush(), nullExpected);
ASSERT_EQ(bufferedFile.seekStart(), FudStatus::Success);
Vector<utf8> output{Vector<utf8>::withSize(testName.size()).takeOkay()};
auto readResult = bufferedFile.read(
reinterpret_cast<std::byte*>(output.data()),
testName.size(),
testName.size());
ASSERT_EQ(readResult, expected);
EXPECT_EQ(output.size(), testName.size());
EXPECT_EQ(0, compareMem(output.data(), output.size(), testName.data(), testName.size()).takeOkayOr(-1));
EXPECT_EQ(bufferedFile.close(true), FudStatus::Success);
ASSERT_EQ(rmFile(testName), 0);
}
} // namespace fud
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