From: Antonio Terceiro <terceiro@debian.org>
Date: Wed, 22 Oct 2014 09:40:14 -0200
Subject: Use a private temporary dir

Without this vagrant will clutter $TMPDIR with dozens of even hundreds
of temporary files (~4 per vagrant invocation).
---
 lib/vagrant/box.rb           |  3 ++-
 lib/vagrant/util.rb          |  1 +
 lib/vagrant/util/tempfile.rb | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 lib/vagrant/util/tempfile.rb

diff --git a/lib/vagrant/box.rb b/lib/vagrant/box.rb
index cd839ee..65eee88 100644
--- a/lib/vagrant/box.rb
+++ b/lib/vagrant/box.rb
@@ -9,6 +9,7 @@ require "vagrant/util/downloader"
 require "vagrant/util/platform"
 require "vagrant/util/safe_chdir"
 require "vagrant/util/subprocess"
+require "vagrant/util/tempfile"
 
 module Vagrant
   # Represents a "box," which is a package Vagrant environment that is used
@@ -118,7 +119,7 @@ module Vagrant
     # @param [Hash] download_options Options to pass to the downloader.
     # @return [BoxMetadata]
     def load_metadata(**download_options)
-      tf = Tempfile.new("vagrant-load-metadata")
+      tf = Util::Tempfile.new("vagrant-load-metadata")
       tf.close
 
       url = @metadata_url
diff --git a/lib/vagrant/util.rb b/lib/vagrant/util.rb
index 07f3b18..a806ba5 100644
--- a/lib/vagrant/util.rb
+++ b/lib/vagrant/util.rb
@@ -8,6 +8,7 @@ module Vagrant
     autoload :Retryable,                 'vagrant/util/retryable'
     autoload :SafeExec,                  'vagrant/util/safe_exec'
     autoload :StackedProcRunner,         'vagrant/util/stacked_proc_runner'
+    autoload :Tempfile,                  'vagrant/util/tempfile'
     autoload :TemplateRenderer,          'vagrant/util/template_renderer'
     autoload :StringBlockEditor,         'vagrant/util/string_block_editor'
     autoload :Subprocess,                'vagrant/util/subprocess'
diff --git a/lib/vagrant/util/tempfile.rb b/lib/vagrant/util/tempfile.rb
new file mode 100644
index 0000000..0cbbb53
--- /dev/null
+++ b/lib/vagrant/util/tempfile.rb
@@ -0,0 +1,39 @@
+require 'fileutils'
+require 'tmpdir'
+
+module Vagrant
+  module Util
+    class Tempfile < ::Tempfile
+
+      def initialize(basename)
+        super(basename, private_tmpdir)
+      end
+
+      def private_tmpdir
+        self.class.private_tmpdir
+      end
+
+      def self.private_tmpdir
+        @private_tmpdir ||=
+          begin
+            user = Etc.getpwuid.name
+            pid = Process.pid
+            tmpdir = File.join(Dir.tmpdir, "vagrant-#{user}-#{pid}")
+            FileUtils.mkdir_p(tmpdir)
+            FileUtils.chmod(0700, tmpdir)
+            tmpdir
+          end
+      end
+
+      def self.mktmpdir(prefix_suffix)
+        Dir.mktmpdir(prefix_suffix, private_tmpdir)
+      end
+
+
+    end
+  end
+end
+
+at_exit do
+  FileUtils.rm_rf(Vagrant::Util::Tempfile.private_tmpdir)
+end