fix xmrig bundling issues

src/daemon/xmrig_manager.cpp

@@ -466,6 +466,18 @@ bool XmrigManager::startProcess(const std::string& xmrigPath, const std::string&
         dup2(pipefd[1], STDERR_FILENO);
         close(pipefd[1]);
 
+        // Detach from controlling terminal's stdin to prevent SIGTTIN/SIGTTOU
+        // when running in a new process group (setpgid below).
+        int devnull = open("/dev/null", O_RDONLY);
+        if (devnull >= 0) {
+            dup2(devnull, STDIN_FILENO);
+            close(devnull);
+        }
+
+        // Ignore job-control signals that a background process group may receive
+        signal(SIGTTIN, SIG_IGN);
+        signal(SIGTTOU, SIG_IGN);
+
         // New process group so we can kill the whole group
         setpgid(0, 0);