Remove core Tempfile dependency (1.9.2-preview1 compat)

With the 1.9.2preview1 release (and presumably 1.9.1 p243), the
Ruby core team has decided that bending over backwards to
support crippled operating/file systems was necessary and that
files must be closed before unlinking.

Regardless, this is more efficient than using Tempfile because:

  1) no delegation is necessary, this is a real File object

  2) no mkdir is necessary for locking, we can trust O_EXCL
     to work properly without unnecessary FS activity

  3) no finalizer is needed to unlink the file, we unlink
     it as soon as possible after creation.

1 files changed, 2 insertions, 8 deletions

diff --git a/lib/unicorn/app/exec_cgi.rb b/lib/unicorn/app/exec_cgi.rb
index 147b279..67817c8 100644
--- a/lib/unicorn/app/exec_cgi.rb
+++ b/lib/unicorn/app/exec_cgi.rb
@@ -42,11 +42,8 @@ module Unicorn::App
 
     # Calls the app
     def call(env)
-      out, err = Tempfile.new(nil), Tempfile.new(nil)
-      out.unlink
-      err.unlink
+      out, err = Unicorn::Util.tmpio, Unicorn::Util.tmpio
       inp = force_file_input(env)
-      out.sync = err.sync = true
       pid = fork { run_child(inp, out, err, env) }
       inp.close
       pid, status = Process.waitpid2(pid)
@@ -125,10 +122,7 @@ module Unicorn::App
       if inp.size == 0 # inp could be a StringIO or StringIO-like object
         ::File.open('/dev/null', 'rb')
       else
-        tmp = Tempfile.new(nil)
-        tmp.unlink
-        tmp.binmode
-        tmp.sync = true
+        tmp = Unicorn::Util.tmpio
 
         buf = Z.dup
         while inp.read(CHUNK_SIZE, buf)