Handle SIGTERM and SIGHUP in Murmur

git-svn-id: https://mumble.svn.sourceforge.net/svnroot/mumble/trunk@906 05730e5d-ab1b-0410-a4ac-84af385074fa

src/murmur/DBus.cpp

@@ -1059,6 +1059,7 @@ extern QFile *qfLog;
 void MetaDBus::rotateLogs(const QDBusMessage &msg) {
 	if (! qfLog || ! qfLog->isOpen()) {
 		MurmurDBus::qdbc.send(msg.createErrorReply("net.sourceforge.mumble.Error.nolog", "Logfile not in use"));
+		return;
 	}
 	qWarning("Logfile rotation requested from D-Bus, will reopen %s", qPrintable(Meta::mp.qsLogfile));
 	qfLog->close();

src/murmur/UnixMurmur.cpp

@@ -0,0 +1,129 @@
+/* Copyright (C) 2005-2007, Thorvald Natvig <thorvald@natvig.com>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+   - Neither the name of the Mumble Developers nor the names of its
+     contributors may be used to endorse or promote products derived from this
+     software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <signal.h>
+
+#include "UnixMurmur.h"
+#include "Meta.h"
+
+extern QFile *qfLog;
+
+int UnixMurmur::iHupFd[2];
+int UnixMurmur::iTermFd[2];
+
+UnixMurmur::UnixMurmur() {
+	if (::socketpair(AF_UNIX, SOCK_STREAM, 0, iHupFd))
+		qFatal("Couldn't create HUP socketpair");
+
+	if (::socketpair(AF_UNIX, SOCK_STREAM, 0, iTermFd))
+		qFatal("Couldn't create TERM socketpair");
+		
+	qsnHup = new QSocketNotifier(iHupFd[1], QSocketNotifier::Read, this);
+	qsnTerm = new QSocketNotifier(iTermFd[1], QSocketNotifier::Read, this);
+	
+	connect(qsnHup, SIGNAL(activated(int)), this, SLOT(handleSigHup()));
+	connect(qsnTerm, SIGNAL(activated(int)), this, SLOT(handleSigTerm()));
+	
+	struct sigaction hup, term;
+	
+	hup.sa_handler = hupSignalHandler;
+	sigemptyset(&hup.sa_mask);
+	hup.sa_flags = SA_RESTART;
+	
+	if (sigaction(SIGHUP, &hup, NULL))
+		qFatal("Failed to install SIGHUP handler");
+
+	term.sa_handler = termSignalHandler;
+	sigemptyset(&term.sa_mask);
+	term.sa_flags = SA_RESTART;
+	
+	if (sigaction(SIGTERM, &term, NULL))
+		qFatal("Failed to install SIGTERM handler");
+}
+
+UnixMurmur::~UnixMurmur() {
+	delete qsnHup;
+	delete qsnTerm;
+	
+	qsnHup = NULL;
+	qsnTerm = NULL;
+
+	close(iHupFd[0]);
+	close(iHupFd[1]);
+	close(iTermFd[0]);
+	close(iTermFd[1]);
+}
+
+void UnixMurmur::hupSignalHandler(int) {
+	char a = 1;
+	::write(iHupFd[0], &a, sizeof(a));
+}
+
+void UnixMurmur::termSignalHandler(int) {
+	char a = 1;
+	::write(iTermFd[0], &a, sizeof(a));
+}
+
+
+// Keep these two synchronized with matching actions in DBus.cpp
+
+void UnixMurmur::handleSigHup() {
+	qsnHup->setEnabled(false);
+	char tmp;
+	::read(iHupFd[1], &tmp, sizeof(tmp));
+	
+        if (! qfLog || ! qfLog->isOpen()) {
+        	qWarning("Caught SIGHUP, but logfile not in use");
+	} else {
+		qWarning("Caught SIGHUP, will reopen %s", qPrintable(Meta::mp.qsLogfile));
+		qfLog->close();
+		qfLog->setFileName(Meta::mp.qsLogfile);
+		if (! qfLog->open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text)) {
+			delete qfLog;
+			qfLog = NULL;
+		} else {
+			qfLog->setTextModeEnabled(true);
+			qWarning("Log rotated successfully");
+		}
+	}
+	qsnHup->setEnabled(true);
+}
+
+void UnixMurmur::handleSigTerm() {
+	qsnTerm->setEnabled(false);
+	char tmp;
+	::read(iTermFd[1], &tmp, sizeof(tmp));
+	
+	qWarning("Caught SIGTERM, exiting");
+
+	QCoreApplication::instance()->quit();
+	
+	qsnTerm->setEnabled(true);
+}

src/murmur/UnixMurmur.h

@@ -0,0 +1,52 @@
+/* Copyright (C) 2005-2007, Thorvald Natvig <thorvald@natvig.com>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+   - Neither the name of the Mumble Developers nor the names of its
+     contributors may be used to endorse or promote products derived from this
+     software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef _UNIXMURMUR_H
+#define _UNIXMURMUR_H
+
+#include "murmur_pch.h"
+
+class UnixMurmur : public QObject {
+		Q_OBJECT
+	protected:
+		static int iHupFd[2], iTermFd[2];
+		QSocketNotifier *qsnHup, *qsnTerm;
+		
+		static void hupSignalHandler(int);
+		static void termSignalHandler(int);
+	public slots:
+		void handleSigHup();
+		void handleSigTerm();
+	public:
+		UnixMurmur();
+		~UnixMurmur();
+};
+
+#endif

src/murmur/murmur.cpp

@@ -39,6 +39,10 @@
 #include "DBus.h"
 #include "Meta.h"
 
+#ifdef Q_OS_UNIX
+#include "UnixMurmur.h"
+#endif
+
 QFile *qfLog = NULL;
 
 static bool bVerbose = false;
@@ -140,6 +144,7 @@ int main(int argc, char **argv) {
 	a.setWindowIcon(icon);
 #else
 	QCoreApplication a(argc, argv);
+	UnixMurmur unixhandler;
 #endif
 	a.setApplicationName("Murmur");
 	a.setOrganizationName("Mumble");

src/murmur/murmur.pro

@@ -36,6 +36,8 @@ win32 {
 unix {
   CONFIG += link_pkgconfig
   PKGCONFIG += openssl
+  HEADERS += UnixMurmur.h
+  SOURCES += UnixMurmur.cpp
   TARGET = murmurd
 }