added daemon option and application parameters

server/main.cpp

@@ -21,13 +21,86 @@
 
 #include <QtPlugin>
 
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <string.h>
+
+void daemonizeGuh() {
+    // Our process ID and Session ID
+    pid_t pid, sid;
+
+    // Fork off the parent process
+    pid = fork();
+    if (pid < 0) {
+        exit(EXIT_FAILURE);
+    }
+    // If we got a good PID, then we can exit the parent process.
+    if (pid > 0) {
+        exit(EXIT_SUCCESS);
+    }
+
+    // Change the file mode mask
+    umask(0);
+    // Create a new SID for the child process
+    sid = setsid();
+    if (sid < 0) {
+        // Log the failure
+        exit(EXIT_FAILURE);
+    }
+
+    // Change the current working directory
+    if ((chdir("/")) < 0) {
+        /* Log the failure */
+        exit(EXIT_FAILURE);
+    }
+
+    // Close out the standard file descriptors
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+}
+
 int main(int argc, char *argv[])
 {
     QCoreApplication a(argc, argv);
+    QStringList arguments = a.arguments();
+
+    if (arguments.contains("-h") || arguments.contains("--help")) {
+        qDebug() << "guhd" << GUH_VERSION_STRING << "(C) 2014-2015 guh" ;
+        qDebug() << "Released under the GNU GENERAL PUBLIC LICENSE Version 2";
+        qDebug() << "";
+        qDebug() << "guh (/[guːh]/ - pronounced German and sounds like \"goo\") is an open source";
+        qDebug() << "home automation server, which allows to control a lot of different devices ";
+        qDebug() << "from many different manufacturers.";
+        qDebug() << "";
+        qDebug() << "options:";
+        qDebug() << "   -h,     --help              print this help message";
+        qDebug() << "   -v,     --version           print version";
+        qDebug() << "   -e,     --executable        start guh as application, not as daemon";
+        qDebug() << "";
+
+        exit(0);
+    }
+
+    if (arguments.contains("-v") || arguments.contains("--version")) {
+        qDebug() << GUH_VERSION_STRING;
+        exit(0);
+    }
+
+    if (!arguments.contains("-e") && !arguments.contains("--executable")) {
+        qDebug() << "Starting guhd as daemon.";
+        daemonizeGuh();
+    } else {
+        qDebug() << "Starting guhd as executable application.";
+    }
 
     a.setOrganizationName("guh");
-
     GuhCore::instance();
-
     return a.exec();
 }