state_file.rb in vagrant-unbundled-1.8.5.1

- old
+ new

@@ -1,6 +1,8 @@
 require "json"
+require "fileutils"
+require "tempfile"
 
 module Vagrant
   module Plugin
     # This is a helper to deal with the plugin state file that Vagrant
     # uses to track what plugins are installed and activated and such.
@@ -89,11 +91,16 @@
         @data["sources"] || []
       end
 
       # This saves the state back into the state file.
       def save!
-        @path.open("w+") do |f|
+        Tempfile.open(@path.basename.to_s, @path.dirname.to_s) do |f|
+          f.binmode
           f.write(JSON.dump(@data))
+          f.fsync
+          f.chmod(0644)
+          f.close
+          FileUtils.mv(f.path, @path)
         end
       end
 
       protected
 