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Description

The proc-wait3 library adds several new methods to Ruby's Process module. These include:

gem install proc-wait3

Note that this is a C extension, and so does require a compiler.

require 'proc/wait3'

pid = fork{
  sleep 1
  exit 2
}

puts Time.now.to_s
Process.wait3
puts $?.exitstatus # => 2

Not all platforms (e.g. MacOS) automatically restart wait3() after an EINTR so you'll have to do it manually:

begin
  puts Time.now.to_s
  Process.wait3
  puts $?.exitstatus # => 2
rescue Errno::EINTR
  retry
end

As of version 2.1.0 you shouldn't have to do this.

You can find more sample code under the "examples" directory.