First commit

inc/custom_signal.h

@@ -0,0 +1,12 @@
+#ifndef SIGNAL_H
+#define SIGNAL_H
+
+#define DEFAULT_SIGINT 2
+#define TIME_TO_RESET 30
+
+#include <signal.h>
+
+void serverSigHandler(int sig);
+void setServerSignalHandler();
+
+#endif

src/custom_signal.c

@@ -0,0 +1,28 @@
+#include <unistd.h>
+#include "../inc/custom_signal.h"
+
+void serverSigHandler(int sig) {
+    static int sigint_count = DEFAULT_SIGINT;
+    
+    switch (sig) {
+    case SIGINT:
+        sigint_count--;
+        if (sigint_count > 0) {
+            printf("<Server> Press again Ctrl^C to exit (whitin %d sec)\n", TIME_TO_RESET);
+            alarm(TIME_TO_RESET);
+        } else {
+            // TODO bisogna fare un "at exit"
+            exit(0);
+        }
+        break;
+    default: //SIGALRM
+        printf("<Server> Time to exit (%d s) expired", TIME_TO_RESET);
+        sigint_count = DEFAULT_SIGINT;
+        break;
+    }
+}
+
+void setServerSignalHandler() {
+    signal(SIGINT, serverSigHandler);
+    signal(SIGALRM, serverSigHandler);
+}