--- a/file_demo.c
+++ b/file_demo.c
@@ -22,8 +22,10 @@
         return -1;
     mode = strtoul (argv[1], NULL, 8);
 
-    system ("/bin/rm -f /home/mbroeker/Desktop/test1.txt");
-    system ("/bin/rm -f /home/mbroeker/Desktop/test2.txt");
+    if (system ("/bin/rm -f /home/mbroeker/Desktop/test1.txt") != 0)
+        return EXIT_FAILURE;
+    if (system ("/bin/rm -f /home/mbroeker/Desktop/test2.txt") != 0)
+        return EXIT_FAILURE;
 
     /*
      * Opens ReadOnly