openpilot0/system/logcatd/logcatd_systemd.cc

76 lines
2.1 KiB
C++

#include <systemd/sd-journal.h>
#include <cassert>
#include <csignal>
#include <map>
#include <string>
#include "third_party/json11/json11.hpp"
#include "cereal/messaging/messaging.h"
#include "common/timing.h"
#include "common/util.h"
ExitHandler do_exit;
int main(int argc, char *argv[]) {
PubMaster pm({"androidLog"});
sd_journal *journal;
int err = sd_journal_open(&journal, 0);
assert(err >= 0);
err = sd_journal_get_fd(journal); // needed so sd_journal_wait() works properly if files rotate
assert(err >= 0);
err = sd_journal_seek_tail(journal);
assert(err >= 0);
// workaround for bug https://github.com/systemd/systemd/issues/9934
// call sd_journal_previous_skip after sd_journal_seek_tail (like journalctl -f does) to makes things work.
sd_journal_previous_skip(journal, 1);
while (!do_exit) {
err = sd_journal_next(journal);
assert(err >= 0);
// Wait for new message if we didn't receive anything
if (err == 0) {
err = sd_journal_wait(journal, 1000 * 1000);
assert(err >= 0);
continue; // Try again
}
uint64_t timestamp = 0;
err = sd_journal_get_realtime_usec(journal, &timestamp);
assert(err >= 0);
const void *data;
size_t length;
std::map<std::string, std::string> kv;
SD_JOURNAL_FOREACH_DATA(journal, data, length) {
std::string str((char*)data, length);
// Split "KEY=VALUE"" on "=" and put in map
std::size_t found = str.find("=");
if (found != std::string::npos) {
kv[str.substr(0, found)] = str.substr(found + 1, std::string::npos);
}
}
MessageBuilder msg;
// Build message
auto androidEntry = msg.initEvent().initAndroidLog();
androidEntry.setTs(timestamp);
androidEntry.setMessage(json11::Json(kv).dump());
if (kv.count("_PID")) androidEntry.setPid(std::atoi(kv["_PID"].c_str()));
if (kv.count("PRIORITY")) androidEntry.setPriority(std::atoi(kv["PRIORITY"].c_str()));
if (kv.count("SYSLOG_IDENTIFIER")) androidEntry.setTag(kv["SYSLOG_IDENTIFIER"]);
pm.send("androidLog", msg);
}
sd_journal_close(journal);
return 0;
}