From: Collin Vandyck <collin.vandyck@...>
Date: 2007-09-12T22:41:30+09:00
Subject: Re: How to prevent child process from receiving INT signal?

I created a small code example that reproduces this:

#!/usr/bin/env ruby

def start(server)
  return if not server
  pwd = Dir.pwd
  command = "/usr/bin/java "
  command+= 
"-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager "
  command+= 
"-Djava.util.logging.config.file=#{pwd}/#{server}/conf/logging.properties 
"
  command+= "-Djava.endorsed.dirs=#{pwd}/#{server}/common/endorsed "
  command+= "-Dcatalina.base=#{pwd}/#{server} "
  command+= "-Dcatalina.home=#{pwd}/#{server} "
  command+= "-Djava.io.tmpdir=#{pwd}/#{server}/temp "
  command+= "-classpath 
:#{pwd}/#{server}/bin/bootstrap.jar:#{pwd}/#{server}/bin/commons-logging-api.jar 
"
  command+= "-Xmx300m "
  command+= "org.apache.catalina.startup.Bootstrap "
  command+= "start "
  command+= ">> #{pwd}/#{server}/logs/catalina.out 2>&1 & "

  puts command
  pid = fork do
    Signal.trap('HUP', 'IGNORE')
    Signal.trap('INT', 'IGNORE')
    exec command
  end
  Process.detach(pid)
end


start 8080
loop do
  puts "hi"
  sleep 1
end

After Tomcat is started, the console starts outputting "hi" every 
second. A CTRL-C will kill the loop and the tomcat process.  Is it 
possible that the Tomcat process is also reading from STDIN?  I have 
also tried trapping the INT signal on the parent process with no luck 
(the Tomcat process quits, but the main process does not)





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