Fixes: NB#217376 - Applauncherd writes log messages, but not to syslog

RevBy: Jussi Lind

src/launcherlib/CMakeLists.txt

@@ -23,7 +23,7 @@ endif(WRT_FOUND)
 
 # Set libraries to be linked. Shared libraries to be preloaded are not linked in anymore,
 # but dlopen():ed and listed in src/launcher/preload.h instead.
-link_libraries(${LIBDL} ${QT_QTCORE_LIBRARY})
+link_libraries(${LIBDL} )
 
 # Set executable
 add_library(applauncherd MODULE ${SRC} ${MOC_SRC})

src/launcherlib/booster.cpp

@@ -32,6 +32,7 @@
 #include <sys/prctl.h>
 #include <sys/resource.h>
 #include <fcntl.h>
+#include <cstring>
 
 #ifdef HAVE_CREDS
     #include <sys/creds.h>

src/launcherlib/daemon.cpp

@@ -37,6 +37,7 @@
 #include <fcntl.h>
 #include <dlfcn.h>
 #include <glob.h>
+#include <cstring>
 
 Daemon * Daemon::m_instance = NULL;
 int Daemon::m_lockFd = -1;

src/launcherlib/logger.cpp

@@ -21,88 +21,17 @@
 #include <cstdlib>
 #include <syslog.h>
 #include <cstdarg>
-#include <QDateTime>
-#include <QDir>
-#include <QString>
+#include <cstdio>
+#include <unistd.h>
 
-namespace
-{
-    const QString logDirectory("/var/log");
-    const QString logFileName(logDirectory + QDir::separator() + PROG_NAME_LAUNCHER + ".log");
-    const QString oldLogFileName(logFileName + ".old");
-    const QString dateFormat("yyyy-MM-dd hh:mm:ss.zzz");
-}
 
 bool Logger::m_isOpened  = false;
-bool Logger::m_useSyslog = false;
 bool Logger::m_echoMode  = false;
 
-QTextStream Logger::m_logStream;
-QFile Logger::m_logFile;
-
 void Logger::openLog(const char * progName)
 {
-    if (!Logger::m_isOpened)
-    {
-        // Check if it's possible to write under /var/log
-        // Should make it possible to get the logs in the enviroments
-        // with and without syslog.
-        QDir logDir;
-        if (logDir.exists(logDirectory))
-        {
-            // Directory exists, is it possible to create a file in it?
-            m_logFile.setFileName(oldLogFileName);
-            if (m_logFile.open(QIODevice::WriteOnly))
-            {
-                m_logFile.close();
-                m_logFile.remove();
-            }
-            else
-            {
-                // It is not possible to write to file. Use syslog
-                m_useSyslog = true;
-            }
-        }
-        else
-        {
-            // Directory does not exist. Is it possible to create it?
-            if (logDir.mkdir(logDirectory) == false)
-            {
-                // Not possible to create directory. Use syslog.
-                m_useSyslog = true;
-            }
-        }
-
-        // Initialize the logging interface
-        if (m_useSyslog == false)
-        {
-            // Remove the oldest log file
-            m_logFile.setFileName(oldLogFileName);
-            m_logFile.remove();
-
-            // Copy latest log file to .log.old
-            m_logFile.setFileName(logFileName);
-            m_logFile.rename(oldLogFileName);
-
-            // Open current log file
-            m_logFile.setFileName(logFileName);
-            if (m_logFile.open(QIODevice::WriteOnly))
-            {
-                Logger::m_logStream.setDevice(&m_logFile);
-            }
-            else
-            {
-                m_useSyslog = true;
-            }
-        } 
-
-        if (m_useSyslog)
-        {
-            openlog(progName, LOG_PID, LOG_DAEMON);
-        }
-
-        Logger::m_isOpened = true;
-    }
+    openlog(progName, LOG_PID, LOG_DAEMON);
+    Logger::m_isOpened = true;
 }
 
 void Logger::closeLog()
@@ -110,16 +39,7 @@ void Logger::closeLog()
     if (Logger::m_isOpened)
     {
         // Close syslog
-        if (m_useSyslog)
-        {
-            closelog();
-        }
-        // Close log file
-        else
-        {
-            m_logFile.close();
-        }
-
+        closelog();
         Logger::m_isOpened = false;
     }
 }
@@ -136,53 +56,10 @@ void Logger::writeLog(const int priority, const char * format, va_list ap)
         }
 
         // Print to syslog
-        if (m_useSyslog)
-        {
-            vsyslog(priority, format, ap);
-        }
-        // Print to file
-        else
-        {
-            // Print message to a QString
-            QString msg;
-            msg.vsprintf(format, ap);
-
-            // Print date and time to the stream
-            m_logStream << 
-                QDateTime::currentDateTime().toString(dateFormat);
-
-            // Print type prefix to the stream
-            switch (priority)
-            {
-            case LOG_DEBUG:
-                m_logStream << " [DEBUG] ";
-                break;
-
-            case LOG_ERR:
-                m_logStream << " [ERROR] ";
-                break;
-
-            case LOG_WARNING:
-                m_logStream << " [WARNING] ";
-                break;
-
-            case LOG_INFO:
-                m_logStream << " [INFO] ";
-                break;
-
-            default:
-                m_logStream << " [N/A] ";
-                break;
-            }
-
-            // Print message to the stream
-            m_logStream << msg << "\n";
-            m_logStream.flush();
-        }
+        vsyslog(priority, format, ap);
     }
 }
 
-
 void Logger::logDebug(const char * format, ...)
 {
 #ifndef DEBUG_LOGGING_DISABLED
@@ -191,7 +68,7 @@ void Logger::logDebug(const char * format, ...)
     writeLog(LOG_DEBUG, format, ap);
     va_end(ap);
 #else
-    Q_UNUSED(format);
+    (void)format;
 #endif
 }
 

src/launcherlib/logger.h

@@ -20,8 +20,6 @@
 #ifndef LOGGER_H
 #define LOGGER_H
 
-#include <QTextStream>
-#include <QFile>
 #include <cstdarg>
 
 /*!
@@ -104,13 +102,6 @@ private:
     static void writeLog(const int priority, const char * format, va_list ap); 
     //! True if the log is open
     static bool m_isOpened;
-    //! Log file which is used if the syslog is not available    
-    //static QFile m_logFile;
-    static QFile m_logFile;
-    //! Text stream for log file
-    static QTextStream m_logStream;
-    //! True if the syslog is available
-    static bool m_useSyslog; 
     //! Echo everything to stdout if true
     static bool m_echoMode;
 };

src/launcherlib/main.cpp

@@ -26,7 +26,7 @@
 #include <fcntl.h>
 #include <sys/file.h>
 
-#include <QtCore/QtGlobal>
+#define DECL_EXPORT extern "C" __attribute__ ((__visibility__("default")))
 
 //! Signal handler to reap zombie processes
 void reapZombies(int)
@@ -43,7 +43,7 @@ void exitLauncher(int)
 }
 
 //! Main function
-Q_DECL_EXPORT int main(int argc, char * argv[])
+DECL_EXPORT int main(int argc, char * argv[])
 {
 
     // Open the log

src/launcherlib/socketmanager.cpp

@@ -24,6 +24,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <cstdlib>
+#include <cstring>
 
 void SocketManager::initSocket(const string & socketId)
 {