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README

== Description
   A Ruby interface for gathering process information.

== Prerequisites
* Ruby 1.8.2 or later
* Test::Unit 2.x (development only)

== Supported Platforms
* Windows NT family (NT, 2000, XP, etc)
* Linux 2.6+
* BSD (various flavors)
* Solaris 8+
* HP-UX 10+
* OS X 10.4+

== Installation
=== Rubygems
gem install sys-proctable

You may need to specify a platform in some cases. For example:

gem install sys-proctable --platform mswin32 # Windows
gem install sys-proctable --platform sunos   # Solaris
gem install sys-proctalbe --platform linux   # Linux

=== Standard
rake install

= Synopsis
   require 'sys/proctable'
   include Sys

   # Everything
   ProcTable.ps{ |p|
      puts p.pid.to_s
      puts p.comm
      ...
   }

   or

   # Just one process
   s = ProcTable.ps(2123)
   puts s.pid.to_s
   puts s.comm
   ...

   # Return the results as an array of ProcTableStructs
   a = ProcTable.ps
   a.each do |p|
      puts a.pid
      ...
   end

== Notes 
   Windows users may pass a host name as a second argument to get process
   information from a different host. This relies on the WMI service running.

== Known Issues
=== BSD
   A kvm interface is used. That means the owner of the process using the
   sys-proctable library needs to be a member of the kvm group (or root).

=== Solaris
   The cmdline member on Solaris is limited to 80 characters unless you (or
   your program) own the process. This is a Solaris design flaw/feature.

=== OS X
   At the moment you do not get the full command line string. The code required
   to get this information is obnoxious and I don't have any compelling desire
   to add it. However, if you're willing to submit a patch I'll accept it.

   You can find a good starting point with the OS X code found in Dan Urist's
   Proc::ProcessTable module. You can find that module on CPAN. Point your
   browser at http://search.cpan.org.

=== Thread Safety
   I am not currently using a thread-safe version of readdir(). I am not
   especially concerned about it either. If you are trying to read information
   out of /proc from different threads at the same time there is something
   seriously wrong with your code logic. Using readdir_r() still won't solve
   all potential thread safety issues anyway.

== Future Plans
   Research has indicated that the kvm approach is less favored than a sysctl
   approach on BSD variants. I will try to add this interface in a future
   release.

== Acknowledgements
   This library is largely based on the Perl module Proc::ProcessTable by
   Dan Urist. Many ideas, as well as large chunks of code, were taken
   from his work. So, a big THANK YOU goes out to Dan Urist.

   A big thanks also goes out to Mike Hall who was very helpful with ideas,
   logic and testing.

   Thanks also go to Sean Chittenden for providing an account on one of his
   FreeBSD machines. This is how the FreeBSD support was (initially) added.

   Thanks go to James Hranicky for providing a patch that grabs name, eid,
   euid, gid and guid info in the Linux version, along with some general
   debugging help.
   
   Thanks go to David Felstead for the original OS X code.

   Finally I'd like to thank all the folks who have submitted bug reports
   and/or patches.

== Help Wanted
   I do not have access to all platforms. If your platform is not supported
   then you will need to either submit a patch or give me a remote account
   on a box with a compiler so that I can write the code.

== More documentation
   See the documentation under the 'doc' directory for more information,
   including platform specific notes and issues.

== License
   Artistic 2.0
    
== Copyright
   (C) 2003-2009 Daniel J. Berger
   All Rights Reserved.

== Author
   Daniel J. Berger
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