From 049b56a4e23367a2d9dc4bd68490ca9f6d6d2263 Mon Sep 17 00:00:00 2001
From: Ivan Kuchin <tadump+git@gmail.com>
Date: Wed, 16 Jan 2013 23:54:56 +0100
Subject: [PATCH] -s option of which command is custom and should not be used,
 closes #7

---
 lib/image_optim.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/image_optim.rb b/lib/image_optim.rb
index ca16470f..21a2c45c 100644
--- a/lib/image_optim.rb
+++ b/lib/image_optim.rb
@@ -210,7 +210,7 @@ def apply_threading(array)
 
   # Check if bin can be accessed
   def bin_accessible?(bin)
-    system(*%W[which -s #{bin}])
+    `which #{bin.to_s.shellescape}` != ''
   end
 
   # http://stackoverflow.com/questions/891537/ruby-detect-number-of-cpus-installed