minor update to clean up code. tested on dell xps 9570, seems to be working correctly.

main.c

@@ -62,26 +62,46 @@ void recordData() {
     fclose(fp);
 }
 
-int main(int argc, char * argv[]) {
-    // Check if the argument is --daemonize
-    if (argc > 1) {
-        if ((strcmp(argv[1], "--daemonize") == 0) || (strcmp(argv[1], "-d") == 0)) {
+void daemonize() {
     printf("Daemonizing...\n");
 
     // Daemonize the process
     pid_t pid, sid;
     pid = fork();
-            if (pid < 0) exit(EXIT_FAILURE);
-            if (pid > 0) exit(EXIT_SUCCESS);
+
+    if (pid < 0) {
+        printf("daemonizing failed! pid: %d\n", pid);
+        exit(EXIT_FAILURE);
+    }
+
+    // This is not needed. 
+    if (pid > 0) {
+        printf("daemonizing succeeded! pid: %d\n", pid);
+        exit(EXIT_SUCCESS);
+    }
 
     sid = setsid();
 
-            if (sid < 0) exit(EXIT_FAILURE);
-            if ((chdir("/")) < 0) exit(EXIT_FAILURE);
-
+    if (sid < 0) {
+        printf("daemonizing failed! sid: %d\n", sid);
+        exit(EXIT_FAILURE);
     }
+
+    if ((chdir("/")) < 0) {
+        printf("daemonizing failed! dir not changed\n");
+        exit(EXIT_FAILURE);
+    }
+}
+
+int main(int argc, char * argv[]) {
+    // Check if the argument is --daemonize
+    if (argc > 1) {
+        if ((strcmp(argv[1], "--daemonize") == 0) || (strcmp(argv[1], "-d") == 0))
+            daemonize();
     } else {
         printf("Usage: %s [--daemonize|-d]\n", argv[0]);
+        printf("recording data once.\n");
+        recordData();
         exit(EXIT_FAILURE);
     }