From: Roger Pack <rogerpack2005@...>
Date: 2010-06-26T06:36:12+09:00
Subject: RCR: IO.popen4

Currently with the std lib there is no (built in) way to get the PID of
a currently running child process (short of using fork, which is
unavailable on windows).

i.e.

IO.popen("ls") # what's the PID?
r,w,e,thread =  Open3.popen3("ls") # what's the PID?



begin
  Timeout.timeout(1) {
    system("bash /c sleep")
  }
rescue Timeout::Error
  # what's the pid, so I can kill it?
end

Jruby has come up with a new method,

pid,r,e,w = IO.popen4("ls")

suggestion: this should be a part of std lib, for the reasons I
discussed above.
Any thoughts on this one?
Thanks.
-rp
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