added run() for ExecuteCmd, which returns pid of the child process

src/FbCommands.cc

@@ -113,7 +113,18 @@ ExecuteCmd::ExecuteCmd(const std::string &cmd, int screen_num):m_cmd(cmd), m_scr
 
 void ExecuteCmd::execute() {
 #ifndef __EMX__
-    if (! fork()) {
+    run();
+#else //   __EMX__
+    spawnlp(P_NOWAIT, "cmd.exe", "cmd.exe", "/c", m_cmd.c_str(), static_cast<void*>(NULL));
+#endif // !__EMX__
+
+}
+
+int ExecuteCmd::run() {
+    pid_t pid = fork();
+    if (pid) 
+        return pid;
+
     std::string displaystring("DISPLAY=");
     displaystring += DisplayString(FbTk::App::instance()->display());
     char intbuff[64];
@@ -134,11 +145,8 @@ void ExecuteCmd::execute() {
     putenv(const_cast<char *>(displaystring.c_str()));
     execl("/bin/sh", "/bin/sh", "-c", m_cmd.c_str(), static_cast<void*>(NULL));
     exit(0);
-    }
-#else //   __EMX__
-    spawnlp(P_NOWAIT, "cmd.exe", "cmd.exe", "/c", m_cmd.c_str(), static_cast<void*>(NULL));
-#endif // !__EMX__
 
+    return pid; // compiler happy -> we are happy ;)
 }
 
 ExportCmd::ExportCmd(const std::string& name, const std::string& value) :

src/FbCommands.hh

@@ -37,6 +37,10 @@ class ExecuteCmd: public FbTk::Command {
 public:
     ExecuteCmd(const std::string &cmd, int screen_num = -1);
     void execute();
+    /**
+     * same as execute but returns pid
+     */
+    int run();
 private:
     std::string m_cmd;
     const int m_screen_num;