gistfile1.rb

$ irb
1.9.3p448 :001 > require 'tempfile'
 => true
1.9.3p448 :002 > require 'mixlib/shellout'
 => true
1.9.3p448 :003 > file = Tempfile.new('sudoer')
 => #<File:/var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso>
1.9.3p448 :004 > file.write("STRING OF INVALID SUDOERS TEXT")
 => 30
1.9.3p448 :005 > cmd = Mixlib::ShellOut.new("visudo -cf #{file.path}").run_command
 => <Mixlib::ShellOut#70211487207060: command: 'visudo -cf /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso' process_status: #<Process::Status: pid 81554 exit 0> stdout: '/var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso: parsed OK' stderr: '' child_pid: 81554 environment: {"LC_ALL"=>"C"} timeout: 600 user:  group:  working_dir:  >
1.9.3p448 :006 > cmd.exitstatus
 => 0
1.9.3p448 :007 > cmd.stdout
 => "/var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso: parsed OK\n"
1.9.3p448 :008 > cmd.stderr
 => ""
1.9.3p448 :009 > file.flush
 => #<File:/var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso>
1.9.3p448 :010 > cmd = Mixlib::ShellOut.new("visudo -cf #{file.path}").run_command
 => <Mixlib::ShellOut#70211478886740: command: 'visudo -cf /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso' process_status: #<Process::Status: pid 81555 exit 1> stdout: 'parse error in /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso near line 0' stderr: '>>> /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso: syntax error near line 0 <<<' child_pid: 81555 environment: {"LC_ALL"=>"C"} timeout: 600 user:  group:  working_dir:  >
1.9.3p448 :011 > cmd.stderr
 => ">>> /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso: syntax error near line 0 <<<\n"
1.9.3p448 :012 > cmd.stdout
 => "parse error in /var/folders/xn/3nvd2hd54vl5swb9s6_1x4fc0000gp/T/sudoer20130905-81550-11bzqso near line 0\n"
1.9.3p448 :013 > cmd.exitstatus
 => 1