bin/shellplay in shellplay-0.1.7 vs bin/shellplay in shellplay-0.1.8

@@ -5,10 +5,12 @@
 
 
 lib = File.expand_path('../../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
+SHELL = ENV['SHELL']
+
 require 'shellplay/session'
 
 @session = Shellplay::Session.new
 @session.import(ARGV[0])
 
@@ -23,24 +25,23 @@
   puts "  h,?        show help"
   puts "  s          list screens"
   puts "  s#         jump to screen #"
   puts "  <enter>    jump to next screen"
   puts "  p          jump to previous screen"
-  puts "  <command>  execute a subcommand in a bash -l -c"
+  puts "  <command>  execute a subcommand in a `$SHELL -c`"
   puts "  x,q        quit"
   puts
 end
 
 # generic display method
 # 
 def display(screen)
   if screen.clearscreen
-    if ENV['TERM_PROGRAM'] = 'iTerm.app'
+    if ENV['TERM_PROGRAM'] == 'iTerm.app'
       print "\e]50;ClearScrollback\a"
     else
-      `clear`
-      print "\e[c"
+      print "\033c"
     end
   end
   if screen.displaycommand
     if screen.customprompt
       print screen.customprompt
@@ -118,10 +119,10 @@
     show($1)
   when ''
     shownext
   else
     begin
-      Open3.popen3(command.strip) do |i, o, e, t|
+      Open3.popen3(SHELL, "-c", command.strip) do |i, o, e, t|
         o.read.split("\n").each do |line|
           puts line
           sleep @sleeptime
         end
         e.read.split("\n").each do |line|