fix infinite loop error

1 files changed, 1 insertions, 1 deletions

diff --git a/at.py b/at.py
index 22bb220..96be1d8 100644
--- a/at.py
+++ b/at.py
@@ -246,7 +246,7 @@ class DhcpdUpdater(MtimeUpdater):
         while True:
             # using readline because iter(file) blocks file.tell usage
             line = f.readline()
-            if not f:
+            if not line:
                 return offset
             line = line.split('#')[0]
             cmd = line.strip().split()