Add AIX support.

MANIFEST

@@ -3,6 +3,7 @@
 * Rakefile
 * README
 * sys-proctable.gemspec
+* doc/aix.txt
 * doc/bsd.txt
 * doc/hpux.txt
 * doc/linux.txt
@@ -17,9 +18,11 @@
 * ext/hpux/extconf.rb
 * ext/hpux/sys/proctable.c
 * lib/sys/top.rb
+* lib/aix/sys/proctable.rb
 * lib/linux/sys/proctable.rb
 * lib/sunos/sys/proctable.rb
 * lib/windows/sys/proctable.rb
+* test/test_sys_proctable_aix.rb
 * test/test_sys_proctable_all.rb
 * test/test_sys_proctable_darwin.rb
 * test/test_sys_proctable_hpux.rb

Rakefile

@@ -38,7 +38,7 @@ task :build => [:clean] do
       ext = '.sl'
   end
 
-  unless CONFIG['host_os'] =~ /win32|mswin|dos|cygwin|mingw|windows|linux|sunos|solaris/i
+  unless CONFIG['host_os'] =~ /win32|mswin|dos|cygwin|mingw|windows|linux|sunos|solaris|aix/i
     Dir.chdir(dir) do
       ruby 'extconf.rb'
       sh 'make'
@@ -61,6 +61,8 @@ task :install => [:build] do
       file = 'lib/linux/sys/proctable.rb'
     when /sunos|solaris/i
       file = 'lib/sunos/sys/proctable.rb'
+    when /aix/i
+      file = 'lib/aix/sys/proctable.rb'
     when /bsd/i
       Dir.chdir('ext/bsd'){ sh 'make install' }
     when /darwin/i
@@ -111,6 +113,9 @@ Rake::TestTask.new do |t|
     when /sunos|solaris/i
       t.test_files = FileList['test/test_sys_proctable_sunos.rb']
       t.libs << 'lib/sunos'
+    when /aix/i
+      t.test_files = FileList['test/test_sys_proctable_aix.rb']
+      t.libs << 'lib/aix'
     when /darwin/i
       t.libs << 'ext/darwin'
       t.test_files = FileList['test/test_sys_proctable_darwin.rb']
@@ -162,6 +167,11 @@ namespace :gem do
          spec.require_paths = ['lib', 'lib/sunos']
          spec.files += ['lib/sunos/sys/proctable.rb']
          spec.test_files << 'test/test_sys_proctable_sunos.rb'
+      when /aix/i
+         spec.platform = Gem::Platform.new(['universal', 'aix5'])
+         spec.require_paths = ['lib', 'lib/aix']
+         spec.files += ['lib/aix/sys/proctable.rb']
+         spec.test_files << 'test/test_sys_proctable_aix.rb'
       when /mswin|win32|dos|cygwin|mingw|windows/i
          spec.platform = Gem::Platform.new(['universal', 'mingw32'])
          spec.require_paths = ['lib', 'lib/windows']

doc/aix.txt

@@ -0,0 +1,86 @@
+= Description
+  A Ruby interface for gathering process table information. This is a pure
+  Ruby implementation that unpacks data out of your /proc filesystem.
+
+= Synopsis
+  require 'sys/proctable'
+  include Sys
+
+  # Everything
+  ProcTable.ps{ |p|
+    puts p.pid.to_s
+    puts p.comm
+    ...
+  }
+
+  or
+
+  # Just one process
+  p = ProcTable.ps(2123)
+  puts p.pid.to_s
+  puts p.comm
+  ...
+
+  or
+
+  # Return the results as an array of ProcTableStructs
+  a = ProcTable.ps()
+  a.each do |p|
+     puts a.pid
+     ...
+  end
+
+= Constants
+VERSION
+  Returns the current version number for this library (as a string).
+
+= Class Methods
+ProcTable.fields
+  Returns an array of fields available on the current OS.
+
+ProcTable.ps(pid=nil)
+ProcTable.ps { |s| ... }
+  If no pid's or processes are included as arguments, in block form it
+  returns a struct of type ProcTableStruct for every process in the proc
+  table.  Otherwise it returns an array of ProcTableStruct's.
+
+  If a process id is provided, a single ProcTable struct is returned, or
+  nil if the pid is not found.
+
+= Exception Classes
+ProcTable::Error < StandardError
+  Raised if the /proc field is unreadable and/or unmounted.
+
+= Supported fields
+  You can view the supported fields with the "fields()" class method.
+
+= Future Plans
+  Have the flags fields return meaningful values.
+
+= Notes
+  The "comm" field isn't really part of the psinfo struct.  It is just a copy
+  (i.e. is identical to) the "fname" field.  It exists to provide a degree
+  of consistency between all of the platforms.
+
+= Known Bugs
+  None known.  Please log any bugs on the project page at
+  http://www.rubyforge.org/projects/sysutils
+
+= License
+  Artistic 2.0
+
+= Copyright
+  (C) 2003-2014 Daniel J. Berger
+  All Rights Reserved
+
+= Warranty
+  This package is provided "as is" and without any express or
+  implied warranties, including, without limitation, the implied
+  warranties of merchantability and fitness for a particular purpose.
+
+= Authors
+  Rick Ohnemus
+  Daniel J. Berger
+
+= See Also
+  ps, proc