mirror of https://github.com/tdlib/td.git
126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/FileLog.h"
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#include "td/utils/common.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/port/path.h"
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#include "td/utils/port/StdStreams.h"
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#include "td/utils/Slice.h"
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#include "td/utils/SliceBuilder.h"
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namespace td {
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Status FileLog::init(string path, int64 rotate_threshold, bool redirect_stderr) {
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if (path.empty()) {
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return Status::Error("Log file path can't be empty");
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}
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if (path == path_) {
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set_rotate_threshold(rotate_threshold);
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return Status::OK();
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}
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TRY_RESULT(fd, FileFd::open(path, FileFd::Create | FileFd::Write | FileFd::Append));
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fd_.close();
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fd_ = std::move(fd);
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if (!Stderr().empty() && redirect_stderr) {
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fd_.get_native_fd().duplicate(Stderr().get_native_fd()).ignore();
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}
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auto r_path = realpath(path, true);
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if (r_path.is_error()) {
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path_ = std::move(path);
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} else {
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path_ = r_path.move_as_ok();
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}
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TRY_RESULT_ASSIGN(size_, fd_.get_size());
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rotate_threshold_ = rotate_threshold;
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redirect_stderr_ = redirect_stderr;
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return Status::OK();
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}
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Slice FileLog::get_path() const {
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return path_;
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}
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vector<string> FileLog::get_file_paths() {
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vector<string> result;
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if (!path_.empty()) {
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result.push_back(path_);
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result.push_back(PSTRING() << path_ << ".old");
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}
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return result;
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}
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void FileLog::set_rotate_threshold(int64 rotate_threshold) {
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rotate_threshold_ = rotate_threshold;
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}
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int64 FileLog::get_rotate_threshold() const {
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return rotate_threshold_;
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}
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bool FileLog::get_redirect_stderr() const {
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return redirect_stderr_;
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}
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void FileLog::do_append(int log_level, CSlice slice) {
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if (size_ > rotate_threshold_ || want_rotate_.load(std::memory_order_relaxed)) {
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auto status = rename(path_, PSLICE() << path_ << ".old");
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if (status.is_error()) {
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process_fatal_error(PSLICE() << status.error() << " in " << __FILE__ << " at " << __LINE__ << '\n');
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}
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do_after_rotation();
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}
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while (!slice.empty()) {
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auto r_size = fd_.write(slice);
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if (r_size.is_error()) {
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process_fatal_error(PSLICE() << r_size.error() << " in " << __FILE__ << " at " << __LINE__ << '\n');
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}
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auto written = r_size.ok();
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size_ += static_cast<int64>(written);
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slice.remove_prefix(written);
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}
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}
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void FileLog::after_rotation() {
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if (path_.empty()) {
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return;
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}
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do_after_rotation();
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}
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void FileLog::lazy_rotate() {
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want_rotate_ = true;
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}
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void FileLog::do_after_rotation() {
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want_rotate_ = false;
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ScopedDisableLog disable_log; // to ensure that nothing will be printed to the closed log
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CHECK(!path_.empty());
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fd_.close();
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auto r_fd = FileFd::open(path_, FileFd::Create | FileFd::Truncate | FileFd::Write);
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if (r_fd.is_error()) {
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process_fatal_error(PSLICE() << r_fd.error() << " in " << __FILE__ << " at " << __LINE__ << '\n');
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}
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fd_ = r_fd.move_as_ok();
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if (!Stderr().empty() && redirect_stderr_) {
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fd_.get_native_fd().duplicate(Stderr().get_native_fd()).ignore();
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}
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size_ = 0;
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}
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Result<unique_ptr<LogInterface>> FileLog::create(string path, int64 rotate_threshold, bool redirect_stderr) {
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auto l = make_unique<FileLog>();
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TRY_STATUS(l->init(std::move(path), rotate_threshold, redirect_stderr));
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return std::move(l);
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}
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} // namespace td
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