Commit 7c8a7176 authored by louiz’'s avatar louiz’

Only use sd_journal_* if we really are outputing to journald

We check that the device and inode numbers are actually the same as the
JOURNAL_STREAM value, instead of just checking that the value exists.

This fixes the logger unit tests
parent 25423ffd
#include <logger/logger.hpp>
#include <config/config.hpp>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
Logger::Logger(const int log_level):
log_level(log_level),
stream(std::cout.rdbuf()),
......@@ -8,7 +12,22 @@ Logger::Logger(const int log_level):
null_stream{&null_buffer}
{
#ifdef SYSTEMD_FOUND
if (::getenv("JOURNAL_STREAM") != nullptr && this->use_stdout())
if (!this->use_stdout())
return;
// See https://www.freedesktop.org/software/systemd/man/systemd.exec.html#%24JOURNAL_STREAM
const char* journal_stream = ::getenv("JOURNAL_STREAM");
if (journal_stream == nullptr)
return;
struct stat s{};
const int res = ::fstat(STDOUT_FILENO, &s);
if (res == -1)
return;
const auto stdout_stream = std::to_string(s.st_dev) + ":" + std::to_string(s.st_ino);
if (stdout_stream == journal_stream)
this->use_systemd = true;
#endif
}
......
......@@ -9,6 +9,7 @@
*/
#include <memory>
#include <string>
#include <iostream>
#include <fstream>
#include <sstream>
......
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