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/*
* Copyright (C) 2004-2025 ZNC, see the NOTICE file for details.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <znc/FileUtils.h>
#include <znc/Server.h>
#include <znc/IRCNetwork.h>
#include <znc/User.h>
#include <syslog.h>
#include <time.h>
class CAdminLogMod : public CModule {
public:
MODCONSTRUCTOR(CAdminLogMod) {
AddHelpCommand();
AddCommand("Show", "", t_d("Show the logging target"),
[=](const CString& sLine) { OnShowCommand(sLine); });
AddCommand("Target", t_d("<file|syslog|both> [path]"),
t_d("Set the logging target"),
[=](const CString& sLine) { OnTargetCommand(sLine); });
openlog("znc", LOG_PID, LOG_DAEMON);
}
~CAdminLogMod() override {
Log("Logging ended.");
closelog();
}
bool OnLoad(const CString& sArgs, CString& sMessage) override {
CString sTarget = GetNV("target");
if (sTarget.Equals("syslog"))
m_eLogMode = LOG_TO_SYSLOG;
else if (sTarget.Equals("both"))
m_eLogMode = LOG_TO_BOTH;
else if (sTarget.Equals("file"))
m_eLogMode = LOG_TO_FILE;
else
m_eLogMode = LOG_TO_FILE;
SetLogFilePath(GetNV("path"));
Log("Logging started. ZNC PID[" + CString(getpid()) + "] UID/GID[" +
CString(getuid()) + ":" + CString(getgid()) + "]");
return true;
}
void OnIRCConnected() override {
Log("[" + GetUser()->GetUsername() + "/" + GetNetwork()->GetName() +
"] connected to IRC: " +
GetNetwork()->GetCurrentServer()->GetName());
}
void OnIRCDisconnected() override {
Log("[" + GetUser()->GetUsername() + "/" + GetNetwork()->GetName() +
"] disconnected from IRC");
}
EModRet OnRawMessage(CMessage& Message) override {
if (Message.GetCommand().Equals("ERROR")) {
// ERROR :Closing Link: nick[24.24.24.24] (Excess Flood)
// ERROR :Closing Link: nick[24.24.24.24] Killer (Local kill by
// Killer (reason))
Log("[" + GetUser()->GetUsername() + "/" + GetNetwork()->GetName() +
"] disconnected from IRC: " +
GetNetwork()->GetCurrentServer()->GetName() + " [" +
Message.GetParamsColon(0) + "]",
LOG_NOTICE);
}
return CONTINUE;
}
void OnClientLogin() override {
Log("[" + GetUser()->GetUsername() + "] connected to ZNC from " +
GetClient()->GetRemoteIP());
}
void OnClientDisconnect() override {
Log("[" + GetUser()->GetUsername() + "] disconnected from ZNC from " +
GetClient()->GetRemoteIP());
}
void OnFailedLogin(const CString& sUsername,
const CString& sRemoteIP) override {
Log("[" + sUsername + "] failed to login from " + sRemoteIP,
LOG_WARNING);
}
void SetLogFilePath(CString sPath) {
if (sPath.empty()) {
sPath = GetSavePath() + "/znc.log";
}
CFile LogFile(sPath);
CString sLogDir = LogFile.GetDir();
struct stat ModDirInfo;
CFile::GetInfo(GetSavePath(), ModDirInfo);
if (!CFile::Exists(sLogDir)) {
CDir::MakeDir(sLogDir, ModDirInfo.st_mode);
}
m_sLogFile = sPath;
SetNV("path", sPath);
}
void Log(CString sLine, int iPrio = LOG_INFO) {
if (m_eLogMode & LOG_TO_SYSLOG) syslog(iPrio, "%s", sLine.c_str());
if (m_eLogMode & LOG_TO_FILE) {
time_t curtime;
tm* timeinfo;
char buf[23];
time(&curtime);
timeinfo = localtime(&curtime);
strftime(buf, sizeof(buf), "[%Y-%m-%d %H:%M:%S] ", timeinfo);
CFile LogFile(m_sLogFile);
if (LogFile.Open(O_WRONLY | O_APPEND | O_CREAT))
LogFile.Write(buf + sLine + "\n");
else
DEBUG("Failed to write to [" << m_sLogFile
<< "]: " << strerror(errno));
}
}
void OnModCommand(const CString& sCommand) override {
if (!GetUser()->IsAdmin()) {
PutModule(t_s("Access denied"));
} else {
HandleCommand(sCommand);
}
}
void OnTargetCommand(const CString& sCommand) {
CString sArg = sCommand.Token(1, false);
CString sTarget;
CString sMessage;
LogMode mode;
if (sArg.Equals("file")) {
sTarget = "file";
sMessage = t_s("Now logging to file");
mode = LOG_TO_FILE;
} else if (sArg.Equals("syslog")) {
sTarget = "syslog";
sMessage = t_s("Now only logging to syslog");
mode = LOG_TO_SYSLOG;
} else if (sArg.Equals("both")) {
sTarget = "both";
sMessage = t_s("Now logging to syslog and file");
mode = LOG_TO_BOTH;
} else {
if (sArg.empty()) {
PutModule(t_s("Usage: Target <file|syslog|both> [path]"));
} else {
PutModule(t_s("Unknown target"));
}
return;
}
if (mode != LOG_TO_SYSLOG) {
CString sPath = sCommand.Token(2, true);
SetLogFilePath(sPath);
sMessage += " [" + sPath + "]";
}
Log(sMessage);
SetNV("target", sTarget);
m_eLogMode = mode;
PutModule(sMessage);
}
void OnShowCommand(const CString& sCommand) {
CString sTarget;
switch (m_eLogMode) {
case LOG_TO_FILE:
sTarget = t_s("Logging is enabled for file");
break;
case LOG_TO_SYSLOG:
sTarget = t_s("Logging is enabled for syslog");
break;
case LOG_TO_BOTH:
sTarget = t_s("Logging is enabled for both, file and syslog");
break;
}
PutModule(sTarget);
if (m_eLogMode != LOG_TO_SYSLOG)
PutModule(t_f("Log file will be written to {1}")(m_sLogFile));
}
private:
enum LogMode {
LOG_TO_FILE = 1 << 0,
LOG_TO_SYSLOG = 1 << 1,
LOG_TO_BOTH = LOG_TO_FILE | LOG_TO_SYSLOG
};
LogMode m_eLogMode = LOG_TO_FILE;
CString m_sLogFile;
};
template <>
void TModInfo<CAdminLogMod>(CModInfo& Info) {
Info.SetWikiPage("adminlog");
}
GLOBALMODULEDEFS(CAdminLogMod, t_s("Log ZNC events to file and/or syslog."))
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