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mlog: --max-log-files to set the max number of rotated log files

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stoffu 2018-06-01 12:29:26 +09:00
parent 8a7b3ff138
commit 63d0ab09b5
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GPG key ID: 41DAB8343A9EC012
5 changed files with 63 additions and 5 deletions
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53
contrib/epee/src/mlog.cpp
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@ -116,7 +116,7 @@ static const char *get_default_categories(int level)
return categories;
}
void mlog_configure(const std::string &filename_base, bool console, const std::size_t max_log_file_size)
void mlog_configure(const std::string &filename_base, bool console, const std::size_t max_log_file_size, const std::size_t max_log_files)
{
el::Configurations c;
c.setGlobally(el::ConfigurationType::Filename, filename_base);
@ -134,9 +134,58 @@ void mlog_configure(const std::string &filename_base, bool console, const std::s
el::Loggers::addFlag(el::LoggingFlag::DisableApplicationAbortOnFatalLog);
el::Loggers::addFlag(el::LoggingFlag::ColoredTerminalOutput);
el::Loggers::addFlag(el::LoggingFlag::StrictLogFileSizeCheck);
el::Helpers::installPreRollOutCallback([filename_base](const char *name, size_t){
el::Helpers::installPreRollOutCallback([filename_base, max_log_files](const char *name, size_t){
std::string rname = generate_log_filename(filename_base.c_str());
rename(name, rname.c_str());
if (max_log_files != 0)
{
std::vector<boost::filesystem::path> found_files;
const boost::filesystem::directory_iterator end_itr;
for (boost::filesystem::directory_iterator iter(boost::filesystem::path(filename_base).parent_path()); iter != end_itr; ++iter)
{
const std::string filename = iter->path().string();
if (filename.size() >= filename_base.size() && std::memcmp(filename.data(), filename_base.data(), filename_base.size()) == 0)
{
found_files.push_back(iter->path());
}
}
if (found_files.size() >= max_log_files)
{
std::sort(found_files.begin(), found_files.end(), [](const boost::filesystem::path &a, const boost::filesystem::path &b) {
boost::system::error_code ec;
std::time_t ta = boost::filesystem::last_write_time(boost::filesystem::path(a), ec);
if (ec)
{
MERROR("Failed to get timestamp from " << a << ": " << ec);
ta = std::time(nullptr);
}
std::time_t tb = boost::filesystem::last_write_time(boost::filesystem::path(b), ec);
if (ec)
{
MERROR("Failed to get timestamp from " << b << ": " << ec);
tb = std::time(nullptr);
}
static_assert(std::is_integral<time_t>(), "bad time_t");
return ta < tb;
});
for (size_t i = 0; i <= found_files.size() - max_log_files; ++i)
{
try
{
boost::system::error_code ec;
boost::filesystem::remove(found_files[i], ec);
if (ec)
{
MERROR("Failed to remove " << found_files[i] << ": " << ec);
}
}
catch (const std::exception &e)
{
MERROR("Failed to remove " << found_files[i] << ": " << e.what());
}
}
}
}
});
mlog_set_common_prefix();
const char *monero_log = getenv("MONERO_LOGS");