From 810713d1e5279462e427069bf8988fb4c2a57caa Mon Sep 17 00:00:00 2001
From: Thomas Hurst <tom@hur.st>
Date: Thu, 25 May 2017 23:44:36 +0100
Subject: [PATCH] within_sandbox: Check fork is supported

---
 lib/capsicum.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/capsicum.rb b/lib/capsicum.rb
index 49a1751..4153ab9 100644
--- a/lib/capsicum.rb
+++ b/lib/capsicum.rb
@@ -55,6 +55,8 @@ module Capsicum
   # @yield block to run within the forked child.
   # @return [Process::Status] exit status of the forked child.
   def within_sandbox
+    raise NotImplementedError, "fork() not supported" unless Process.respond_to? :fork
+
     return enum_for(:within_sandbox) unless block_given?
 
     pid = fork do