From: Brian Warner <warner@allmydata.com>
Date: Wed, 1 Oct 2008 00:30:53 +0000 (-0700)
Subject: misc/cpu-watcher.tac: use writeaside-and-rename for the history.pickle file
X-Git-Url: https://git.rkrishnan.org/simplejson/%22news.html/install.html?a=commitdiff_plain;h=06770f720e45a5b4d4a9049a8f73630e5c511e98;p=tahoe-lafs%2Ftahoe-lafs.git

misc/cpu-watcher.tac: use writeaside-and-rename for the history.pickle file
---

diff --git a/misc/cpu-watcher.tac b/misc/cpu-watcher.tac
index da8d29ab..9695a694 100644
--- a/misc/cpu-watcher.tac
+++ b/misc/cpu-watcher.tac
@@ -199,7 +199,8 @@ class CPUWatcher(service.MultiService, resource.Resource, Referenceable):
             except:
                 log.msg("error reading process %s (%s), ignoring" % (pid, name))
                 log.err()
-        pickle.dump(self.history, open("history.pickle", "wb"))
+        pickle.dump(self.history, open("history.pickle.tmp", "wb"))
+        os.rename("history.pickle.tmp", "history.pickle")
         for (pid, name) in processes:
             row = [name]
             for avg in self.AVERAGES: