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ton/tdutils/td/utils/FileLog.cpp
2019-09-07 14:33:36 +04:00

132 lines
3.7 KiB
C++

/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2019 Telegram Systems LLP
*/
#include "td/utils/FileLog.h"
#include "td/utils/common.h"
#include "td/utils/logging.h"
#include "td/utils/port/FileFd.h"
#include "td/utils/port/path.h"
#include "td/utils/port/StdStreams.h"
#include "td/utils/Slice.h"
#include <limits>
namespace td {
Status FileLog::init(string path, int64 rotate_threshold, bool redirect_stderr) {
if (path == path_) {
set_rotate_threshold(rotate_threshold);
return Status::OK();
}
if (path.empty()) {
return Status::Error("Log file path can't be empty");
}
TRY_RESULT(fd, FileFd::open(path, FileFd::Create | FileFd::Write | FileFd::Append));
fd_.close();
fd_ = std::move(fd);
if (!Stderr().empty() && redirect_stderr) {
fd_.get_native_fd().duplicate(Stderr().get_native_fd()).ignore();
}
auto r_path = realpath(path, true);
if (r_path.is_error()) {
path_ = std::move(path);
} else {
path_ = r_path.move_as_ok();
}
TRY_RESULT(size, fd_.get_size());
size_ = size;
rotate_threshold_ = rotate_threshold;
redirect_stderr_ = redirect_stderr;
return Status::OK();
}
Slice FileLog::get_path() const {
return path_;
}
vector<string> FileLog::get_file_paths() {
vector<string> result;
if (!path_.empty()) {
result.push_back(path_);
result.push_back(PSTRING() << path_ << ".old");
}
return result;
}
void FileLog::set_rotate_threshold(int64 rotate_threshold) {
rotate_threshold_ = rotate_threshold;
}
int64 FileLog::get_rotate_threshold() const {
return rotate_threshold_;
}
void FileLog::append(CSlice cslice, int log_level) {
Slice slice = cslice;
while (!slice.empty()) {
auto r_size = fd_.write(slice);
if (r_size.is_error()) {
process_fatal_error(PSLICE() << r_size.error() << " in " << __FILE__ << " at " << __LINE__);
}
auto written = r_size.ok();
size_ += static_cast<int64>(written);
slice.remove_prefix(written);
}
if (log_level == VERBOSITY_NAME(FATAL)) {
process_fatal_error(cslice);
}
if (size_ > rotate_threshold_) {
auto status = rename(path_, PSLICE() << path_ << ".old");
if (status.is_error()) {
process_fatal_error(PSLICE() << status.error() << " in " << __FILE__ << " at " << __LINE__);
}
do_rotate();
}
}
void FileLog::rotate() {
if (path_.empty()) {
return;
}
do_rotate();
}
void FileLog::do_rotate() {
auto current_verbosity_level = GET_VERBOSITY_LEVEL();
SET_VERBOSITY_LEVEL(std::numeric_limits<int>::min()); // to ensure that nothing will be printed to the closed log
CHECK(!path_.empty());
fd_.close();
auto r_fd = FileFd::open(path_, FileFd::Create | FileFd::Truncate | FileFd::Write);
if (r_fd.is_error()) {
process_fatal_error(PSLICE() << r_fd.error() << " in " << __FILE__ << " at " << __LINE__);
}
fd_ = r_fd.move_as_ok();
if (!Stderr().empty() && redirect_stderr_) {
fd_.get_native_fd().duplicate(Stderr().get_native_fd()).ignore();
}
size_ = 0;
SET_VERBOSITY_LEVEL(current_verbosity_level);
}
} // namespace td