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#
# Author:: Bryan McLellan (btm@loftninjas.org)
# Copyright:: Copyright (c) 2009 Bryan McLellan
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'chef/log'
require 'chef/mixin/command'
require 'chef/provider'
class Chef
class Provider
class Cron < Chef::Provider
include Chef::Mixin::Command
CRON_PATTERN = /([-0-9*,\/]+)\s([-0-9*,\/]+)\s([-0-9*,\/]+)\s([-0-9*,\/]+)\s([-0-9*,\/]+)\s(.*)/
def initialize(new_resource, run_context)
super(new_resource, run_context)
@cron_exists = false
@cron_empty = false
end
attr_accessor :cron_exists, :cron_empty
def load_current_resource
crontab_lines = []
@current_resource = Chef::Resource::Cron.new(@new_resource.name)
@current_resource.user(@new_resource.user)
status = popen4("crontab -l -u #{@new_resource.user}") do |pid, stdin, stdout, stderr|
stdout.each_line { |line| crontab_lines << line }
end
if status.exitstatus > 1
raise Chef::Exceptions::Cron, "Error determining state of #{@new_resource.name}, exit: #{status.exitstatus}"
elsif status.exitstatus == 0
cron_found = false
crontab_lines.each do |line|
case line.chomp
when "# Chef Name: #{@new_resource.name}"
Chef::Log.debug("Found cron '#{@new_resource.name}'")
cron_found = true
@cron_exists = true
next
when /^MAILTO=(\S*)/
@current_resource.mailto($1) if cron_found
next
when /^PATH=(\S*)/
@current_resource.path($1) if cron_found
next
when /^SHELL=(\S*)/
@current_resource.shell($1) if cron_found
next
when /^HOME=(\S*)/
@current_resource.home($1) if cron_found
next
when CRON_PATTERN
if cron_found
@current_resource.minute($1)
@current_resource.hour($2)
@current_resource.day($3)
@current_resource.month($4)
@current_resource.weekday($5)
@current_resource.command($6)
cron_found=false
end
next
else
next
end
end
Chef::Log.debug("Cron '#{@new_resource.name}' not found") unless @cron_exists
elsif status.exitstatus == 1
Chef::Log.debug("Cron empty for '#{@new_resource.user}'")
@cron_empty = true
end
@current_resource
end
def compare_cron
[ :minute, :hour, :day, :month, :weekday, :command, :mailto, :path, :shell, :home ].any? do |cron_var|
!@new_resource.send(cron_var).nil? && @new_resource.send(cron_var) != @current_resource.send(cron_var)
end
end
def action_create
crontab = String.new
newcron = String.new
cron_found = false
newcron << "# Chef Name: #{new_resource.name}\n"
[ :mailto, :path, :shell, :home ].each do |v|
newcron << "#{v.to_s.upcase}=#{@new_resource.send(v)}\n" if @new_resource.send(v)
end
newcron << "#{@new_resource.minute} #{@new_resource.hour} #{@new_resource.day} #{@new_resource.month} #{@new_resource.weekday} #{@new_resource.command}\n"
if @cron_exists
unless compare_cron
Chef::Log.debug("Skipping existing cron entry '#{@new_resource.name}'")
return
end
status = popen4("crontab -l -u #{@new_resource.user}") do |pid, stdin, stdout, stderr|
stdout.each_line do |line|
case line.chomp
when "# Chef Name: #{@new_resource.name}"
cron_found = true
next
when CRON_PATTERN
if cron_found
cron_found = false
crontab << newcron
next
end
else
next if cron_found
end
crontab << line
end
end
status = popen4("crontab -u #{@new_resource.user} -", :waitlast => true) do |pid, stdin, stdout, stderr|
crontab.each_line { |line| stdin.puts "#{line}" }
end
Chef::Log.info("#{@new_resource} updated crontab entry")
@new_resource.updated_by_last_action(true)
else
unless @cron_empty
status = popen4("crontab -l -u #{@new_resource.user}") do |pid, stdin, stdout, stderr|
stdout.each { |line| crontab << line }
end
end
crontab << newcron
status = popen4("crontab -u #{@new_resource.user} -", :waitlast => true) do |pid, stdin, stdout, stderr|
crontab.each_line { |line| stdin.puts "#{line}" }
end
Chef::Log.info("#{@new_resource} added crontab entry")
@new_resource.updated_by_last_action(true)
end
end
def action_delete
if @cron_exists
crontab = String.new
cron_found = false
status = popen4("crontab -l -u #{@new_resource.user}") do |pid, stdin, stdout, stderr|
stdout.each_line do |line|
case line.chomp
when "# Chef Name: #{@new_resource.name}"
cron_found = true
next
when CRON_PATTERN
if cron_found
cron_found = false
next
end
else
next if cron_found
end
crontab << line
end
end
status = popen4("crontab -u #{@new_resource.user} -", :waitlast => true) do |pid, stdin, stdout, stderr|
crontab.each_line { |line| stdin.puts "#{line}" }
end
Chef::Log.info("#{@new_resource} deleted crontab entry")
@new_resource.updated_by_last_action(true)
end
end
end
end
end
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