From 2e3e75b7239ea6caa042287ad720326236ddd762 Mon Sep 17 00:00:00 2001
From: Michael Hanselmann <hansmi@google.com>
Date: Mon, 12 Nov 2007 17:10:18 +0000
Subject: [PATCH] Call fsync() after modifying /etc/hosts.
This is a critical file. Breaking it would be very bad. Thus, if the system
crashes before the data is synched to the disk, it should have the complete
file afterwards.
Reviewed-by: iustinp
---
lib/utils.py | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/utils.py b/lib/utils.py
index 193fde812..53fa6f26c 100644
--- a/lib/utils.py
+++ b/lib/utils.py
@@ -775,6 +775,7 @@ def SetEtcHostsEntry(file_name, ip, hostname, aliases):
out.write('\n')
out.flush()
+ os.fsync(out)
os.rename(tmpname, file_name)
finally:
f.close()
@@ -810,6 +811,7 @@ def RemoveEtcHostsEntry(file_name, hostname):
out.write(line)
out.flush()
+ os.fsync(out)
os.rename(tmpname, file_name)
finally:
f.close()
--
GitLab