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- /*
- * Copyright 2012-present Facebook, Inc.
- *
- * 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 <folly/experimental/TestUtil.h>
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <boost/regex.hpp>
- #include <folly/Exception.h>
- #include <folly/File.h>
- #include <folly/FileUtil.h>
- #include <folly/Memory.h>
- #include <folly/String.h>
- #include <folly/portability/Fcntl.h>
- #ifdef _WIN32
- #include <crtdbg.h> // @manual
- #endif
- namespace folly {
- namespace test {
- namespace {
- fs::path generateUniquePath(fs::path path, StringPiece namePrefix) {
- if (path.empty()) {
- path = fs::temp_directory_path();
- }
- if (namePrefix.empty()) {
- path /= fs::unique_path();
- } else {
- path /=
- fs::unique_path(to<std::string>(namePrefix, ".%%%%-%%%%-%%%%-%%%%"));
- }
- return path;
- }
- } // namespace
- TemporaryFile::TemporaryFile(
- StringPiece namePrefix,
- fs::path dir,
- Scope scope,
- bool closeOnDestruction)
- : scope_(scope),
- closeOnDestruction_(closeOnDestruction),
- fd_(-1),
- path_(generateUniquePath(std::move(dir), namePrefix)) {
- fd_ = open(path_.string().c_str(), O_RDWR | O_CREAT | O_EXCL, 0666);
- checkUnixError(fd_, "open failed");
- if (scope_ == Scope::UNLINK_IMMEDIATELY) {
- boost::system::error_code ec;
- fs::remove(path_, ec);
- if (ec) {
- LOG(WARNING) << "unlink on construction failed: " << ec;
- } else {
- path_.clear();
- }
- }
- }
- void TemporaryFile::close() {
- if (::close(fd_) == -1) {
- PLOG(ERROR) << "close failed";
- }
- fd_ = -1;
- }
- const fs::path& TemporaryFile::path() const {
- CHECK(scope_ != Scope::UNLINK_IMMEDIATELY);
- DCHECK(!path_.empty());
- return path_;
- }
- void TemporaryFile::reset() {
- if (fd_ != -1 && closeOnDestruction_) {
- if (::close(fd_) == -1) {
- PLOG(ERROR) << "close failed (fd = " << fd_ << "): ";
- }
- }
- // If we previously failed to unlink() (UNLINK_IMMEDIATELY), we'll
- // try again here.
- if (scope_ != Scope::PERMANENT && !path_.empty()) {
- boost::system::error_code ec;
- fs::remove(path_, ec);
- if (ec) {
- LOG(WARNING) << "unlink on destruction failed: " << ec;
- }
- }
- }
- TemporaryFile::~TemporaryFile() {
- reset();
- }
- TemporaryDirectory::TemporaryDirectory(
- StringPiece namePrefix,
- fs::path dir,
- Scope scope)
- : scope_(scope),
- path_(std::make_unique<fs::path>(
- generateUniquePath(std::move(dir), namePrefix))) {
- fs::create_directory(path());
- }
- TemporaryDirectory::~TemporaryDirectory() {
- if (scope_ == Scope::DELETE_ON_DESTRUCTION && path_ != nullptr) {
- boost::system::error_code ec;
- fs::remove_all(path(), ec);
- if (ec) {
- LOG(WARNING) << "recursive delete on destruction failed: " << ec;
- }
- }
- }
- ChangeToTempDir::ChangeToTempDir() {
- orig_ = fs::current_path();
- fs::current_path(path());
- }
- ChangeToTempDir::~ChangeToTempDir() {
- if (!orig_.empty()) {
- fs::current_path(orig_);
- }
- }
- namespace detail {
- SavedState disableInvalidParameters() {
- #ifdef _WIN32
- SavedState ret;
- ret.previousThreadLocalHandler =
- _set_thread_local_invalid_parameter_handler([](const wchar_t*,
- const wchar_t*,
- const wchar_t*,
- unsigned int,
- uintptr_t) {});
- ret.previousCrtReportMode = _CrtSetReportMode(_CRT_ASSERT, 0);
- return ret;
- #else
- return SavedState();
- #endif
- }
- #ifdef _WIN32
- void enableInvalidParameters(SavedState state) {
- _set_thread_local_invalid_parameter_handler(
- (_invalid_parameter_handler)state.previousThreadLocalHandler);
- _CrtSetReportMode(_CRT_ASSERT, state.previousCrtReportMode);
- }
- #else
- void enableInvalidParameters(SavedState) {}
- #endif
- bool hasPCREPatternMatch(StringPiece pattern, StringPiece target) {
- return boost::regex_match(
- target.begin(),
- target.end(),
- boost::regex(pattern.begin(), pattern.end()));
- }
- bool hasNoPCREPatternMatch(StringPiece pattern, StringPiece target) {
- return !hasPCREPatternMatch(pattern, target);
- }
- } // namespace detail
- CaptureFD::CaptureFD(int fd, ChunkCob chunk_cob)
- : chunkCob_(std::move(chunk_cob)), fd_(fd), readOffset_(0) {
- oldFDCopy_ = dup(fd_);
- PCHECK(oldFDCopy_ != -1) << "Could not copy FD " << fd_;
- int file_fd = open(file_.path().string().c_str(), O_WRONLY | O_CREAT, 0600);
- PCHECK(dup2(file_fd, fd_) != -1)
- << "Could not replace FD " << fd_ << " with " << file_fd;
- PCHECK(close(file_fd) != -1) << "Could not close " << file_fd;
- }
- void CaptureFD::release() {
- if (oldFDCopy_ != fd_) {
- readIncremental(); // Feed chunkCob_
- PCHECK(dup2(oldFDCopy_, fd_) != -1)
- << "Could not restore old FD " << oldFDCopy_ << " into " << fd_;
- PCHECK(close(oldFDCopy_) != -1) << "Could not close " << oldFDCopy_;
- oldFDCopy_ = fd_; // Make this call idempotent
- }
- }
- CaptureFD::~CaptureFD() {
- release();
- }
- std::string CaptureFD::read() const {
- std::string contents;
- std::string filename = file_.path().string();
- PCHECK(folly::readFile(filename.c_str(), contents));
- return contents;
- }
- std::string CaptureFD::readIncremental() {
- std::string filename = file_.path().string();
- // Yes, I know that I could just keep the file open instead. So sue me.
- folly::File f(openNoInt(filename.c_str(), O_RDONLY), true);
- auto size = size_t(lseek(f.fd(), 0, SEEK_END) - readOffset_);
- std::unique_ptr<char[]> buf(new char[size]);
- auto bytes_read = folly::preadFull(f.fd(), buf.get(), size, readOffset_);
- PCHECK(ssize_t(size) == bytes_read);
- readOffset_ += off_t(size);
- chunkCob_(StringPiece(buf.get(), buf.get() + size));
- return std::string(buf.get(), size);
- }
- } // namespace test
- } // namespace folly
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