1 files changed, 6 insertions, 0 deletions
diff --git a/utils/ipaddr2list.py b/utils/ipaddr2list.py
index 5b2b10bf3..ebf3cf2e6 100755
--- a/utils/ipaddr2list.py
+++ b/utils/ipaddr2list.py
@@ -40,8 +40,10 @@ print("""/*
 
 print("static ndpi_network "+proto.lower()+"_protocol_list[] = {")
 
+lines = 0
 with open(sys.argv[1]) as fp:
     for cnt, line in enumerate(fp):
+        lines += 1
         line = line.rstrip()
 
         if(line != ""):
@@ -60,3 +62,7 @@ with open(sys.argv[1]) as fp:
 print(" /* End */")
 print(" { 0x0, 0, 0 }")
 print("};")
+
+if lines == 0:
+    sys.stderr.write(f'File {sys.argv[1]} is empty.\n')
+    sys.exit(1)