From: Dave Thomas <redmine@...>
Date: 2008-06-16T13:18:04+09:00
Subject: [ruby-core:17270] [Ruby 1.9 - Bug #166] (Open) Signal handling and sleep() don't work together

Issue #166 has been reported by Dave Thomas.

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Bug #166: Signal handling and sleep() don't work together
http://redmine.ruby-lang.org/issues/show/166

Author: Dave Thomas
Status: Open
Priority: Normal
Assigned to: 
Category: 
Target version: 


Setting up a sleep seems to interfere with signal handlers. The following code

 trap("CLD") do
    pid = Process.wait
    puts "Child pid #{pid}: terminated"
 end

 exec("/bin/sh -c 'echo hello'") if fork.nil?
 puts "start"
 sleep 2
 puts "done"

Outputs start/hello/done with no delay, and the trap never fires. Replace the sleep with a gets, and the signal handler gets invoked���it never writes ���Child xxx terminated.���


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