From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2004-03-26T01:34:40+09:00
Subject: [ANN] session-2.1.5



http://www.codeforpeople.com/lib/ruby/session/


2.1.5:
  - added Session.use_spawn=, AbstractSession.use_spawn=, and an :use_session=>
    option to AbstractSession#initialize.  if any of them are set the code uses
    Spawn::spawn to create external processes instead of Open3::popen3.
    Spawn::spawn uses named pipes (fifos) for IPC instead of forking and pipes.
    the fork used in popen3 can cause strange behaviour with multi-threaded apps
    (like a tk app).  see source for details


NAME

  Session
    ::Sh
    ::Bash
    ::Csh
    ::Tcsh
    ::Shell
    ::IDL

SYNOPSIS

  Session::* offers a set of class for driving external progams via pipes.  It
  offers a significant abstraction over Open3::popen since stdout/stderr can
  be processed individually for each command.  Additionally the exit_status of
  each command is made available.  eg.

    bash = Session::Bash.new

    stdout, stderr = bash.execute 'ls'


  or

    bash = Session::Bash.new

    stdout, stderr = StringIO.new, StringIO.new

    bash.execute 'ls', :stdout => stdout, :stderr => stderr
    exit_status = bash.exit_status

  or

    bash = Session::Bash.new

    # output is passed to the block as it is produced!
    bash.execute( 'long_running_command.exe' ) do |out, err|
      logger << out if out
      elogger << err if err
    end

SAMPLES

  see samples/*


AUTHOR

  ara.t.howard@noaa.gov


-a
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