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|
#--
# Copyright 2006 Luke Kanies <luke@madstop.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
#--
class Facter
include Comparable
include Enumerable
FACTERVERSION = '1.3.8'
# = Facter
# Functions as a hash of 'facts' you might care about about your
# system, such as mac address, IP address, Video card, etc.
# returns them dynamically
# == Synopsis
#
# Generally, treat <tt>Facter</tt> as a hash:
# == Example
# require 'facter'
# puts Facter['operatingsystem']
#
@@facts = Hash.new { |hash, key|
key = key.to_s.downcase.intern
if hash.include?(key)
hash[key]
else
nil
end
}
GREEN = "[0;32m"
RESET = "[0m"
@@debug = 0
attr_accessor :name, :searching, :ldapname
# module methods
# Return the version of the library.
def self.version
return FACTERVERSION
end
# Add some debugging
def self.debug(string)
if string.nil?
return
end
if @@debug != 0
puts GREEN + string + RESET
end
end
# Return a fact object by name. If you use this, you still have to call
# 'value' on it to retrieve the actual value.
def self.[](name)
@@facts[name]
end
# Add a resolution mechanism for a named fact. This does not distinguish
# between adding a new fact and adding a new way to resolve a fact.
def self.add(name, &block)
fact = nil
unless fact = @@facts[name]
fact = Facter.new(name)
end
unless block
return fact
end
fact.add(&block)
return fact
end
class << self
include Enumerable
# Iterate across all of the facts.
def each
@@facts.each { |name,fact|
if fact.suitable?
value = fact.value
unless value.nil?
yield name.to_s, fact.value
end
end
}
end
# Allow users to call fact names directly on the Facter class,
# either retrieving the value or comparing it to an existing value.
def method_missing(name, *args)
question = false
if name.to_s =~ /\?$/
question = true
name = name.to_s.sub(/\?$/,'')
end
if fact = @@facts[name]
if question
value = fact.value.downcase
args.each do |arg|
if arg.to_s.downcase == value
return true
end
end
# If we got this far, there was no match.
return false
else
return fact.value
end
else
# Else, fail like a normal missing method.
return super
end
end
end
# Clear all facts. Mostly used for testing.
def self.clear
Facter.flush
Facter.reset
end
# Set debugging on or off.
def self.debugging(bit)
if bit
case bit
when TrueClass: @@debug = 1
when FalseClass: @@debug = 0
when Fixnum:
if bit > 0
@@debug = 1
else
@@debug = 0
end
when String:
if bit.downcase == 'off'
@@debug = 0
else
@@debug = 1
end
else
@@debug = 0
end
else
@@debug = 0
end
end
# Flush all cached values.
def self.flush
@@facts.each { |name, fact| fact.flush }
end
# Return a list of all of the facts.
def self.list
return @@facts.keys
end
# Remove them all.
def self.reset
@@facts.clear
end
# Return a hash of all of our facts.
def self.to_hash(*tags)
@@facts.inject({}) do |h, ary|
if ary[1].suitable? and (tags.empty? or ary[1].tagged?(*tags))
value = ary[1].value
if value
# For backwards compatibility, convert the fact name to a string.
h[ary[0].to_s] = value
end
end
h
end
end
def self.value(name)
if fact = @@facts[name]
fact.value
else
nil
end
end
# Compare one value to another.
def <=>(other)
return self.value <=> other
end
# Are we the same? Used for case statements.
def ===(value)
self.value == value
end
# Create a new fact, with no resolution mechanisms.
def initialize(name)
@name = name.to_s.downcase.intern
if @@facts.include?(@name)
raise ArgumentError, "A fact named %s already exists" % @name
else
@@facts[@name] = self
end
@resolves = []
@tags = []
@searching = false
@value = nil
@ldapname = name.to_s
end
# Add a new resolution mechanism. This requires a block, which will then
# be evaluated in the context of the new mechanism.
def add(&block)
unless block_given?
raise ArgumentError, "You must pass a block to Fact<instance>.add"
end
resolve = Resolution.new(@name)
resolve.fact = self
resolve.instance_eval(&block)
# skip resolves that will never be suitable for us
unless resolve.suitable?
return
end
# insert resolves in order of number of confinements
inserted = false
@resolves.each_with_index { |r,index|
if resolve.length > r.length
@resolves.insert(index,resolve)
inserted = true
break
end
}
unless inserted
@resolves.push resolve
end
end
# Return a count of resolution mechanisms available.
def count
return @resolves.length
end
# Iterate across all of the fact resolution mechanisms and yield each in
# turn. These are inserted in order of most confinements.
def each
@resolves.each { |r| yield r }
end
# Flush any cached values.
def flush
@value = nil
@suitable = nil
end
# Is this fact suitable for finding answers on this host? This is used
# to throw away any initially unsuitable mechanisms.
def suitable?
if @resolves.length == 0
return false
end
unless defined? @suitable or (defined? @suitable and @suitable.nil?)
@suitable = false
@resolves.each { |resolve|
if resolve.suitable?
@suitable = true
break
end
}
end
return @suitable
end
# Add one ore more tags
def tag(*tags)
tags.each do |t|
t = t.to_s.downcase.intern
@tags << t unless @tags.include?(t)
end
end
# Is our fact tagged with all of the specified tags?
def tagged?(*tags)
tags.each do |t|
unless @tags.include? t.to_s.downcase.intern
return false
end
end
return true
end
def tags
@tags.dup
end
# Return the value for a given fact. Searches through all of the mechanisms
# and returns either the first value or nil.
def value
unless @value
# make sure we don't get stuck in recursive dependency loops
if @searching
Facter.debug "Caught recursion on %s" % @name
# return a cached value if we've got it
if @value
return @value
else
return nil
end
end
@value = nil
foundsuits = false
if @resolves.length == 0
Facter.debug "No resolves for %s" % @name
return nil
end
@searching = true
@resolves.each { |resolve|
#Facter.debug "Searching resolves for %s" % @name
if resolve.suitable?
@value = resolve.value
foundsuits = true
end
unless @value.nil? or @value == ""
break
end
}
@searching = false
unless foundsuits
Facter.debug "Found no suitable resolves of %s for %s" %
[@resolves.length,@name]
end
end
if @value.nil?
# nothing
Facter.debug("value for %s is still nil" % @name)
return nil
else
return @value
end
end
# An actual fact resolution mechanism. These are largely just chunks of
# code, with optional confinements restricting the mechanisms to only working on
# specific systems. Note that the confinements are always ANDed, so any
# confinements specified must all be true for the resolution to be
# suitable.
class Resolution
attr_accessor :interpreter, :code, :name, :fact
def Resolution.have_which
if @have_which.nil?
%x{which which 2>/dev/null}
@have_which = ($? == 0)
end
@have_which
end
# Execute a chunk of code.
def Resolution.exec(code, interpreter = "/bin/sh")
if interpreter == "/bin/sh"
binary = code.split(/\s+/).shift
if have_which
path = nil
if binary !~ /^\//
path = %x{which #{binary} 2>/dev/null}.chomp
if path == ""
# we don't have the binary necessary
return nil
end
else
path = binary
end
unless FileTest.exists?(path)
# our binary does not exist
return nil
end
end
out = nil
begin
out = %x{#{code}}.chomp
rescue => detail
$stderr.puts detail
return nil
end
if out == ""
return nil
else
return out
end
else
raise ArgumentError,
"non-sh interpreters are not currently supported"
end
end
# Add a new confine to the resolution mechanism.
def confine(*args)
if args[0].is_a? Hash
args[0].each do |fact, values|
@confines.push Confine.new(fact,*values)
end
else
fact = args.shift
@confines.push Confine.new(fact,*args)
end
end
# Create a new resolution mechanism.
def initialize(name)
@name = name
@confines = []
@value = nil
end
# Return the number of confines.
def length
@confines.length
end
# Set our code for returning a value.
def setcode(string = nil, interp = nil, &block)
if string
@code = string
@interpreter = interp || "/bin/sh"
else
unless block_given?
raise ArgumentError, "You must pass either code or a block"
end
@code = block
end
end
# Set the name by which this parameter is known in LDAP. The default
# is just the fact name.
def setldapname(name)
@fact.ldapname = name.to_s
end
# Is this resolution mechanism suitable on the system in question?
def suitable?
unless defined? @suitable
@suitable = true
if @confines.length == 0
return true
end
@confines.each { |confine|
unless confine.true?
@suitable = false
end
}
end
return @suitable
end
# Set tags on our parent fact.
def tag(*values)
@fact.tag(*values)
end
def to_s
return self.value()
end
# How we get a value for our resolution mechanism.
def value
value = nil
if @code.is_a?(Proc)
value = @code.call()
else
unless defined? @interpreter
@interpreter = "/bin/sh"
end
if @code.nil?
$stderr.puts "Code for %s is nil" % @name
else
value = Resolution.exec(@code,@interpreter)
end
end
if value == ""
value = nil
end
return value
end
end
# A restricting tag for fact resolution mechanisms. The tag must be true
# for the resolution mechanism to be suitable.
class Confine
attr_accessor :fact, :op, :value
# Add the tag. Requires the fact name, an operator, and the value
# we're comparing to.
def initialize(fact, *values)
fact = fact.to_s if fact.is_a? Symbol
@fact = fact
@values = values.collect do |value|
if value.is_a? String
value
else
value.to_s
end
end
end
def to_s
return "'%s' '%s'" % [@fact, @values.join(",")]
end
# Evaluate the fact, returning true or false.
def true?
fact = nil
unless fact = Facter[@fact]
Facter.debug "No fact for %s" % @fact
return false
end
value = fact.value
if value.nil?
return false
end
retval = @values.find { |v|
if value.downcase == v.downcase
break true
end
}
if retval
retval = true
else
retval = false
end
return retval || false
end
end
# Load all of the default facts
def self.loadfacts
Facter.add(:facterversion) do
setcode { FACTERVERSION.to_s }
end
Facter.add(:rubyversion) do
setcode { RUBY_VERSION.to_s }
end
Facter.add(:puppetversion) do
setcode {
begin
require 'puppet'
Puppet::PUPPETVERSION.to_s
rescue LoadError
nil
end
}
end
Facter.add :rubysitedir do
setcode do
version = RUBY_VERSION.to_s.sub(/\.\d+$/, '')
$:.find do |dir|
dir =~ /#{File.join("site_ruby", version)}$/
end
end
end
Facter.add(:kernel) do
setcode 'uname -s'
end
Facter.add(:kernelrelease) do
setcode 'uname -r'
end
{ "LSBRelease" => %r{^LSB Version:\t(.*)$},
"LSBDistId" => %r{^Distributor ID:\t(.*)$},
"LSBDistRelease" => %r{^Release:\t(.*)$},
"LSBDistDescription" => %r{^Description:\t(.*)$},
"LSBDistCodeName" => %r{^Codename:\t(.*)$}
}.each do |fact, pattern|
Facter.add(fact) do
setcode do
unless defined?(@@lsbdata) and defined?(@@lsbtime) and (Time.now.to_i - @@lsbtime.to_i < 5)
type = nil
@@lsbtime = Time.now
@@lsbdata = Resolution.exec('lsb_release -a 2>/dev/null')
end
if pattern.match(@@lsbdata)
$1
else
nil
end
end
end
end
Facter.add(:operatingsystem) do
confine :kernel => :sunos
setcode do "Solaris" end
end
Facter.add(:operatingsystem) do
confine :kernel => :linux
setcode do
if FileTest.exists?("/etc/debian_version")
"Debian"
elsif FileTest.exists?("/etc/gentoo-release")
"Gentoo"
elsif FileTest.exists?("/etc/fedora-release")
"Fedora"
elsif FileTest.exists?("/etc/mandriva-release")
"Mandriva"
elsif FileTest.exists?("/etc/mandrake-release")
"Mandrake"
elsif FileTest.exists?("/etc/redhat-release")
txt = File.read("/etc/redhat-release")
if txt =~ /centos/i
"CentOS"
else
"RedHat"
end
elsif FileTest.exists?("/etc/SuSE-release")
"SuSE"
end
end
end
Facter.add(:operatingsystem) do
# Default to just returning the kernel as the operating system
setcode do Facter[:kernel].value end
end
Facter.add(:operatingsystemrelease) do
confine :operatingsystem => :fedora
setcode do
File::open("/etc/fedora-release", "r") do |f|
line = f.readline.chomp
if line =~ /\(Rawhide\)$/
"Rawhide"
elsif line =~ /release (\d+)/
$1
end
end
end
end
Facter.add(:operatingsystemrelease) do
confine :operatingsystem => %w{RedHat}
setcode do
File::open("/etc/redhat-release", "r") do |f|
line = f.readline.chomp
if line =~ /\(Rawhide\)$/
"Rawhide"
elsif line =~ /release (\d+)/
$1
end
end
end
end
Facter.add(:operatingsystemrelease) do
confine :operatingsystem => %w{CentOS}
setcode do
release = Resolution.exec('rpm -q centos-release')
if release =~ /release-(\d+)/
$1
end
end
end
Facter.add(:operatingsystemrelease) do
setcode do Facter[:kernelrelease].value end
end
Facter.add(:hardwaremodel) do
setcode 'uname -m'
end
Facter.add(:architecture) do
confine :kernel => :linux
setcode do
model = Facter.hardwaremodel
case model
# most linuxen use "x86_64"
when 'x86_64':
Facter.operatingsystem == "Debian" ? "amd64" : model;
when /(i[3456]86|pentium)/: "i386"
else
model
end
end
end
Facter.add(:Cfkey) do
setcode do
value = nil
["/usr/local/etc/cfkey.pub",
"/etc/cfkey.pub",
"/var/cfng/keys/localhost.pub",
"/var/cfengine/ppkeys/localhost.pub",
"/var/lib/cfengine/ppkeys/localhost.pub",
"/var/lib/cfengine2/ppkeys/localhost.pub"
].each { |file|
if FileTest.file?(file)
File.open(file) { |openfile|
value = openfile.readlines.reject { |line|
line =~ /PUBLIC KEY/
}.collect { |line|
line.chomp
}.join("")
}
end
if value
break
end
}
value
end
end
Facter.add(:domain) do
setcode do
# First force the hostname to be checked
Facter.hostname
# Now check to see if it set the domain
if defined? $domain and ! $domain.nil?
$domain
else
nil
end
end
end
# Look for the DNS domain name command first.
Facter.add(:domain) do
setcode do
domain = Resolution.exec('dnsdomainname') or nil
# make sure it's a real domain
if domain and domain =~ /.+\..+/
domain
else
nil
end
end
end
Facter.add(:domain) do
setcode do
domain = Resolution.exec('domainname') or nil
# make sure it's a real domain
if domain and domain =~ /.+\..+/
domain
else
nil
end
end
end
Facter.add(:domain) do
setcode do
value = nil
if FileTest.exists?("/etc/resolv.conf")
File.open("/etc/resolv.conf") { |file|
# is the domain set?
file.each { |line|
if line =~ /domain\s+(\S+)/
value = $1
break
end
}
}
! value and File.open("/etc/resolv.conf") { |file|
# is the search path set?
file.each { |line|
if line =~ /search\s+(\S+)/
value = $1
break
end
}
}
value
else
nil
end
end
end
Facter.add(:hostname) do
setldapname "cn"
setcode do
hostname = nil
name = Resolution.exec('hostname') or nil
if name
if name =~ /^([\w-]+)\.(.+)$/
hostname = $1
# the Domain class uses this
$domain = $2
else
hostname = name
end
hostname
else
nil
end
end
end
Facter.add(:fqdn) do
setcode do
host = Facter.value(:hostname)
domain = Facter.value(:domain)
if host and domain
[host, domain].join(".")
else
nil
end
end
end
Facter.add(:ipaddress) do
setldapname "iphostnumber"
setcode do
require 'resolv'
begin
if hostname = Facter.hostname
ip = Resolv.getaddress(hostname)
unless ip == "127.0.0.1"
ip
end
else
nil
end
rescue Resolv::ResolvError
nil
rescue NoMethodError # i think this is a bug in resolv.rb?
nil
end
end
end
Facter.add(:ipaddress) do
setcode do
if hostname = Facter.hostname
# we need Hostname to exist for this to work
host = nil
if host = Resolution.exec("host #{hostname}")
host = host.chomp.split(/\s/)
if defined? list[-1] and
list[-1] =~ /[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/
list[-1]
end
else
nil
end
else
nil
end
end
end
["/etc/ssh","/usr/local/etc/ssh","/etc","/usr/local/etc"].each { |dir|
{"SSHDSAKey" => "ssh_host_dsa_key.pub",
"SSHRSAKey" => "ssh_host_rsa_key.pub"}.each { |name,file|
Facter.add(name) do
setcode do
value = nil
filepath = File.join(dir,file)
if FileTest.file?(filepath)
begin
File.open(filepath) { |f|
value = f.read.chomp.split(/\s+/)[1]
}
rescue
value = nil
end
end
value
end # end of proc
end # end of add
} # end of hash each
} # end of dir each
Facter.add(:uniqueid) do
setcode 'hostid', '/bin/sh'
confine :operatingsystem => %w{Solaris Linux Fedora RedHat CentOS SuSE Debian Gentoo}
end
Facter.add(:hardwareisa) do
setcode 'uname -p', '/bin/sh'
confine :operatingsystem => %w{Solaris Linux Fedora RedHat CentOS SuSE Debian Gentoo FreeBSD OpenBSD NetBSD}
end
Facter.add(:macaddress) do
confine :operatingsystem => %w{Solaris Linux Fedora RedHat CentOS SuSE Debian Gentoo}
setcode do
ether = []
output = %x{/sbin/ifconfig -a}
output.each {|s|
ether.push($1) if s =~ /(?:ether|HWaddr) (\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2})/
}
ether[0]
end
end
Facter.add(:macaddress) do
confine :operatingsystem => %w{FreeBSD OpenBSD}
setcode do
ether = []
output = %x{/sbin/ifconfig}
output.each {|s|
if s =~ /(?:ether|lladdr)\s+(\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/
ether.push($1)
end
}
ether[0]
end
end
Facter.add(:macaddress) do
confine :kernel => :darwin
setcode do
ether = nil
output = %x{/sbin/ifconfig}
output.split(/^\S/).each { |str|
if str =~ /10baseT/ # we're wired
str =~ /ether (\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/
ether = $1
end
}
ether
end
end
Facter.add(:ipaddress) do
confine :kernel => :linux
setcode do
ip = nil
output = %x{/sbin/ifconfig}
output.split(/^\S/).each { |str|
if str =~ /inet addr:([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/
tmp = $1
unless tmp =~ /127\./
ip = tmp
break
end
end
}
ip
end
end
Facter.add(:ipaddress) do
confine :kernel => %w{FreeBSD OpenBSD solaris}
setcode do
ip = nil
output = %x{/sbin/ifconfig}
output.split(/^\S/).each { |str|
if str =~ /inet ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/
tmp = $1
unless tmp =~ /127\./
ip = tmp
break
end
end
}
ip
end
end
Facter.add(:ipaddress) do
confine :kernel => %w{NetBSD}
setcode do
ip = nil
output = %x{/sbin/ifconfig -a}
output.split(/^\S/).each { |str|
if str =~ /inet ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/
tmp = $1
unless tmp =~ /127\./
ip = tmp
break
end
end
}
ip
end
end
Facter.add(:ipaddress) do
confine :kernel => %w{darwin}
setcode do
ip = nil
iface = ""
output = %x{/usr/sbin/netstat -rn}
if output =~ /^default\s*\S*\s*\S*\s*\S*\s*\S*\s*(\S*).*/
iface = $1
else
warn "Could not find a default route. Using first non-loopback interface"
end
if(iface != "")
output = %x{/sbin/ifconfig #{iface}}
else
output = %x{/sbin/ifconfig}
end
output.split(/^\S/).each { |str|
if str =~ /inet ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/
tmp = $1
unless tmp =~ /127\./
ip = tmp
break
end
end
}
ip
end
end
Facter.add(:hostname) do
confine :kernel => :darwin, :kernelrelease => "R7"
setcode do
%x{/usr/sbin/scutil --get LocalHostName}
end
end
Facter.add(:iphostnumber) do
confine :kernel => :darwin, :kernelrelease => "R6"
setcode do
%x{/usr/sbin/scutil --get LocalHostName}
end
end
Facter.add(:iphostnumber) do
confine :kernel => :darwin, :kernelrelease => "R6"
setcode do
ether = nil
output = %x{/sbin/ifconfig}
output =~ /HWaddr (\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/
ether = $1
ether
end
end
Facter.add(:ps) do
setcode do 'ps -ef' end
end
Facter.add(:ps) do
confine :operatingsystem => %w{FreeBSD NetBSD OpenBSD Darwin}
setcode do 'ps -auxwww' end
end
Facter.add(:id) do
#confine :kernel => %w{Solaris Linux}
confine :operatingsystem => %w{Solaris Linux Fedora RedHat CentOS SuSE Debian Gentoo}
setcode "whoami"
end
locals = []
# Now find all our loadable facts
factdirs = [] # All the places to check for facts
# See if we can find any other facts in the regular Ruby lib
# paths
$:.each do |dir|
fdir = File.join(dir, "facter")
if FileTest.exists?(fdir) and FileTest.directory?(fdir)
factdirs.push(fdir)
end
end
# Also check anything in 'FACTERLIB'
if ENV['FACTERLIB']
ENV['FACTERLIB'].split(":").each do |fdir|
factdirs.push(fdir)
end
end
factdirs.each do |fdir|
Dir.glob("#{fdir}/*.rb").each do |file|
# Load here, rather than require, because otherwise
# the facts won't get reloaded if someone calls
# "loadfacts". Really only important in testing, but,
# well, it's important in testing.
begin
load file
rescue => detail
warn "Could not load %s: %s" %
[file, detail]
end
end
end
# Now try to get facts from the environment
ENV.each do |name, value|
if name =~ /^facter_?(\w+)$/i
Facter.add($1) do
setcode { value }
end
end
end
end
Facter.loadfacts
end
# $Id$
|