Set rlimits in the Application class (rather than in the init script).

Fixes #5260

etc/init.d/icinga2.cmake

@@ -65,9 +65,6 @@ start() {
         fi
 
         echo "Starting Icinga 2: "
-        ulimit -n 32768
-	ulimit -s 512
-	ulimit -u 16384
         $DAEMON -c $ICINGA2_CONFIG_FILE -d -e $ICINGA2_ERROR_LOG -u $ICINGA2_USER -g $ICINGA2_GROUP
 
         echo "Done"

icinga-app/icinga.cpp

@@ -187,6 +187,8 @@ int main(int argc, char **argv)
 {
 	Application::SetStartTime(Utility::GetTime());
 
+	Application::SetResourceLimits();
+
 	/* Set thread title. */
 	Utility::SetThreadName("Main Thread", false);
 

lib/base/application.cpp

@@ -112,6 +112,32 @@ Application::Ptr Application::GetInstance(void)
 	return m_Instance->GetSelf();
 }
 
+void Application::SetResourceLimits(void)
+{
+#ifndef _WIN32
+#	ifdef RLIMIT_NOFILE
+	rlimit rl;
+	rl.rlim_cur = 16 * 1024;
+	rl.rlim_max = rl.rlim_cur;
+
+	if (setrlimit(RLIMIT_NOFILE, &rl) < 0)
+		Log(LogCritical, "base", "Could not adjust resource limit for open file handles (RLIMIT_NOFILE)");
+#	else /* RLIMIT_NOFILE */
+	Log(LogCritical, "base", "System does not support adjusting the resource limit for open file handles (RLIMIT_NOFILE)");
+#	endif /* RLIMIT_NOFILE */
+
+#	ifdef RLIMIT_NPROC
+	rl.rlim_cur = 16 * 1024;
+	rl.rlim_max = rl.rlim_cur;
+
+	if (setrlimit(RLIMIT_NPROC, &rl) < 0)
+		Log(LogCritical, "base", "Could not adjust resource limit for number of processes (RLIMIT_NPROC)");
+#	else /* RLIMIT_NPROC */
+	Log(LogCritical, "base", "System does not support adjusting the resource limit for number of processes (RLIMIT_NPROC)");
+#	endif /* RLIMIT_NPROC */
+#endif /* _WIN32 */
+}
+
 int Application::GetArgC(void)
 {
 	return m_ArgC;

lib/base/application.h

@@ -51,6 +51,8 @@ public:
 	 */
 	virtual int Main(void) = 0;
 
+	static void SetResourceLimits(void);
+
 	static int GetArgC(void);
 	static void SetArgC(int argc);
 

lib/base/unix.h

@@ -39,6 +39,8 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
+#include <sys/time.h>
+#include <sys/resource.h>
 
 typedef int SOCKET;
 #define INVALID_SOCKET (-1)