From 4df78397fea8aaa10d6b99bd08119fa7c2af33ee Mon Sep 17 00:00:00 2001
From: lnu <lnu@f70e237a-67f3-0310-a06c-d2b8a7116972>
Date: Mon, 2 Jan 2006 23:13:26 +0000
Subject: added a lockfile for the cache file

git-svn-id: svn+ssh://svn.gna.org/svn/feed2imap/trunk/feed2imap@74 f70e237a-67f3-0310-a06c-d2b8a7116972
---
 lib/feed2imap/feed2imap.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'lib/feed2imap/feed2imap.rb')

diff --git a/lib/feed2imap/feed2imap.rb b/lib/feed2imap/feed2imap.rb
index 250a0e7..77bd48e 100644
--- a/lib/feed2imap/feed2imap.rb
+++ b/lib/feed2imap/feed2imap.rb
@@ -65,7 +65,13 @@ class Feed2Imap
     if not File::exist?(@config.cache) 
       @logger.warn("Cache file #{@config.cache} not found, using a new one")
     else
-      File::open(@config.cache) { |f| @cache.load(f) }
+      File::open(@config.cache) do |f|
+        if not f.flock(File::LOCK_UN)
+          @logger.fatal("Another instance of feed2imap is already locking the cache file")
+          exit(1)
+        end
+        @cache.load(f)
+      end
     end
     # connecting all IMAP accounts
     @logger.info('Connecting to IMAP accounts')
-- 
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