Sanity checks for version and pack/unpack

git-svn-id: file:///home/svn/incoming/trunk@3196 4d416f70-5f16-0410-b530-b9f4589650da

lib/msf/core.rb

@@ -9,7 +9,10 @@
 #
 ###
 
-# framework-core depends on Rex
+# Sanity check this version of ruby
+require 'msf/sanity'
+
+# The framework-core depends on Rex
 require 'rex'
 require 'rex/ui'
 

lib/msf/sanity.rb

@@ -0,0 +1,23 @@
+#
+# Provides some sanity checks against the ruby build and version
+#
+
+
+# Check for the broken pack/unpack in OS X 10.4.x
+if ([1].pack('n') == "\x01\x00")
+	puts "*** This ruby build has a broken pack/unpack implementation! "
+	
+	if (RUBY_PLATFORM =~ /darwin/)
+		puts "    Apple shipped a broken version of ruby with the 10.4.x   "
+		puts "    release. Please install ruby from source, or use one of  "
+		puts "    the free package managers to obtain a working ruby build."
+	end
+	
+	exit(0)
+end
+
+# Check for ruby 1.8.0 as the minimal supported version
+if (RUBY_VERSION =~ /^1\.[0-7]\./)
+	puts "*** This version of ruby is not supported, please upgrade to 1.8.3+"
+	exit(0)
+end