diff --git a/lib/puppet/util.rb b/lib/puppet/util.rb index 5f56761e5..264e1bd80 100644 --- a/lib/puppet/util.rb +++ b/lib/puppet/util.rb @@ -1,452 +1,452 @@ # A module to collect utility functions. require 'English' require 'puppet/util/monkey_patches' require 'sync' require 'tempfile' require 'puppet/external/lock' require 'monitor' require 'puppet/util/execution_stub' module Puppet # A command failed to execute. require 'puppet/error' class ExecutionFailure < Puppet::Error end module Util require 'benchmark' # These are all for backward compatibility -- these are methods that used # to be in Puppet::Util but have been moved into external modules. require 'puppet/util/posix' extend Puppet::Util::POSIX @@sync_objects = {}.extend MonitorMixin def self.activerecord_version if (defined?(::ActiveRecord) and defined?(::ActiveRecord::VERSION) and defined?(::ActiveRecord::VERSION::MAJOR) and defined?(::ActiveRecord::VERSION::MINOR)) ([::ActiveRecord::VERSION::MAJOR, ::ActiveRecord::VERSION::MINOR].join('.').to_f) else 0 end end def self.synchronize_on(x,type) sync_object,users = 0,1 begin @@sync_objects.synchronize { (@@sync_objects[x] ||= [Sync.new,0])[users] += 1 } @@sync_objects[x][sync_object].synchronize(type) { yield } ensure @@sync_objects.synchronize { @@sync_objects.delete(x) unless (@@sync_objects[x][users] -= 1) > 0 } end end # Change the process to a different user def self.chuser if group = Puppet[:group] begin Puppet::Util::SUIDManager.change_group(group, true) rescue => detail Puppet.warning "could not change to group #{group.inspect}: #{detail}" $stderr.puts "could not change to group #{group.inspect}" # Don't exit on failed group changes, since it's # not fatal #exit(74) end end if user = Puppet[:user] begin Puppet::Util::SUIDManager.change_user(user, true) rescue => detail $stderr.puts "Could not change to user #{user}: #{detail}" exit(74) end end end # Create instance methods for each of the log levels. This allows # the messages to be a little richer. Most classes will be calling this # method. def self.logmethods(klass, useself = true) Puppet::Util::Log.eachlevel { |level| klass.send(:define_method, level, proc { |args| args = args.join(" ") if args.is_a?(Array) if useself Puppet::Util::Log.create( :level => level, :source => self, :message => args ) else Puppet::Util::Log.create( :level => level, :message => args ) end }) } end # Proxy a bunch of methods to another object. def self.classproxy(klass, objmethod, *methods) classobj = class << klass; self; end methods.each do |method| classobj.send(:define_method, method) do |*args| obj = self.send(objmethod) obj.send(method, *args) end end end # Proxy a bunch of methods to another object. def self.proxy(klass, objmethod, *methods) methods.each do |method| klass.send(:define_method, method) do |*args| obj = self.send(objmethod) obj.send(method, *args) end end end # XXX this should all be done using puppet objects, not using # normal mkdir def self.recmkdir(dir,mode = 0755) if FileTest.exist?(dir) return false else tmp = dir.sub(/^\//,'') path = [File::SEPARATOR] tmp.split(File::SEPARATOR).each { |dir| path.push dir if ! FileTest.exist?(File.join(path)) Dir.mkdir(File.join(path), mode) elsif FileTest.directory?(File.join(path)) next else FileTest.exist?(File.join(path)) raise "Cannot create #{dir}: basedir #{File.join(path)} is a file" end } return true end end # Execute a given chunk of code with a new umask. def self.withumask(mask) cur = File.umask(mask) begin yield ensure File.umask(cur) end end def benchmark(*args) msg = args.pop level = args.pop object = nil if args.empty? if respond_to?(level) object = self else object = Puppet end else object = args.pop end raise Puppet::DevError, "Failed to provide level to :benchmark" unless level unless level == :none or object.respond_to? level raise Puppet::DevError, "Benchmarked object does not respond to #{level}" end # Only benchmark if our log level is high enough if level != :none and Puppet::Util::Log.sendlevel?(level) result = nil seconds = Benchmark.realtime { yield } object.send(level, msg + (" in %0.2f seconds" % seconds)) return seconds else yield end end def which(bin) if absolute_path?(bin) return bin if FileTest.file? bin and FileTest.executable? bin else ENV['PATH'].split(File::PATH_SEPARATOR).each do |dir| dest=File.join(dir, bin) return dest if FileTest.file? dest and FileTest.executable? dest end end nil end module_function :which # Determine in a platform-specific way whether a path is absolute. This # defaults to the local platform if none is specified. def absolute_path?(path, platform=nil) # Escape once for the string literal, and once for the regex. slash = '[\\\\/]' name = '[^\\\\/]+' regexes = { :windows => %r!^([A-Z]:#{slash})|(#{slash}#{slash}#{name}#{slash}#{name})|(#{slash}#{slash}\?#{slash}#{name})!i, :posix => %r!^/!, } platform ||= Puppet.features.microsoft_windows? ? :windows : :posix !! (path =~ regexes[platform]) end module_function :absolute_path? # Execute the provided command in a pipe, yielding the pipe object. def execpipe(command, failonfail = true) if respond_to? :debug debug "Executing '#{command}'" else Puppet.debug "Executing '#{command}'" end command_str = command.respond_to?(:join) ? command.join('') : command output = open("| #{command_str} 2>&1") do |pipe| yield pipe end if failonfail unless $CHILD_STATUS == 0 raise ExecutionFailure, output end end output end def execfail(command, exception) output = execute(command) return output rescue ExecutionFailure raise exception, output end def execute_posix(command, arguments, stdin, stdout, stderr) child_pid = Kernel.fork do command = Array(command) Process.setsid begin $stdin.reopen(stdin) $stdout.reopen(stdout) $stderr.reopen(stderr) 3.upto(256){|fd| IO::new(fd).close rescue nil} Puppet::Util::SUIDManager.change_group(arguments[:gid], true) if arguments[:gid] Puppet::Util::SUIDManager.change_user(arguments[:uid], true) if arguments[:uid] ENV['LANG'] = ENV['LC_ALL'] = ENV['LC_MESSAGES'] = ENV['LANGUAGE'] = 'C' Kernel.exec(*command) rescue => detail puts detail.to_s exit!(1) end end child_pid end module_function :execute_posix def execute_windows(command, arguments, stdin, stdout, stderr) command = command.map do |part| part.include?(' ') ? %Q["#{part.gsub(/"/, '\"')}"] : part end.join(" ") if command.is_a?(Array) process_info = Process.create( :command_line => command, :startup_info => {:stdin => stdin, :stdout => stdout, :stderr => stderr} ) process_info.process_id end module_function :execute_windows # Execute the desired command, and return the status and output. # def execute(command, failonfail = true, uid = nil, gid = nil) # :combine sets whether or not to combine stdout/stderr in the output # :stdinfile sets a file that can be used for stdin. Passing a string # for stdin is not currently supported. def execute(command, arguments = {:failonfail => true, :combine => true}) if command.is_a?(Array) command = command.flatten.map(&:to_s) str = command.join(" ") elsif command.is_a?(String) str = command end if respond_to? :debug debug "Executing '#{str}'" else Puppet.debug "Executing '#{str}'" end null_file = Puppet.features.microsoft_windows? ? 'NUL' : '/dev/null' stdin = File.open(arguments[:stdinfile] || null_file, 'r') stdout = arguments[:squelch] ? File.open(null_file, 'w') : Tempfile.new('puppet') stderr = arguments[:combine] ? stdout : File.open(null_file, 'w') exec_args = [command, arguments, stdin, stdout, stderr] if execution_stub = Puppet::Util::ExecutionStub.current_value return execution_stub.call(*exec_args) elsif Puppet.features.posix? child_pid = execute_posix(*exec_args) + child_status = Process.waitpid2(child_pid).last.exitstatus elsif Puppet.features.microsoft_windows? child_pid = execute_windows(*exec_args) + child_status = Process.waitpid2(child_pid).last end - child_status = Process.waitpid2(child_pid).last - [stdin, stdout, stderr].each {|io| io.close rescue nil} # read output in if required unless arguments[:squelch] output = wait_for_output(stdout) Puppet.warning "Could not get output" unless output end if arguments[:failonfail] and child_status != 0 - raise ExecutionFailure, "Execution of '#{str}' returned #{child_status.exitstatus}: #{output}" + raise ExecutionFailure, "Execution of '#{str}' returned #{child_status}: #{output}" end output end module_function :execute def wait_for_output(stdout) # Make sure the file's actually been written. This is basically a race # condition, and is probably a horrible way to handle it, but, well, oh # well. 2.times do |try| if File.exists?(stdout.path) output = stdout.open.read stdout.close(true) return output else time_to_sleep = try / 2.0 Puppet.warning "Waiting for output; will sleep #{time_to_sleep} seconds" sleep(time_to_sleep) end end nil end module_function :wait_for_output # Create an exclusive lock. def threadlock(resource, type = Sync::EX) Puppet::Util.synchronize_on(resource,type) { yield } end # Because some modules provide their own version of this method. alias util_execute execute module_function :benchmark def memory unless defined?(@pmap) @pmap = which('pmap') end if @pmap %x{#{@pmap} #{Process.pid}| grep total}.chomp.sub(/^\s*total\s+/, '').sub(/K$/, '').to_i else 0 end end def symbolize(value) if value.respond_to? :intern value.intern else value end end def symbolizehash(hash) newhash = {} hash.each do |name, val| if name.is_a? String newhash[name.intern] = val else newhash[name] = val end end end def symbolizehash!(hash) hash.each do |name, val| if name.is_a? String hash[name.intern] = val hash.delete(name) end end hash end module_function :symbolize, :symbolizehash, :symbolizehash! # Just benchmark, with no logging. def thinmark seconds = Benchmark.realtime { yield } seconds end module_function :memory, :thinmark def secure_open(file,must_be_w,&block) raise Puppet::DevError,"secure_open only works with mode 'w'" unless must_be_w == 'w' raise Puppet::DevError,"secure_open only requires a block" unless block_given? Puppet.warning "#{file} was a symlink to #{File.readlink(file)}" if File.symlink?(file) if File.exists?(file) or File.symlink?(file) wait = File.symlink?(file) ? 5.0 : 0.1 File.delete(file) sleep wait # give it a chance to reappear, just in case someone is actively trying something. end begin File.open(file,File::CREAT|File::EXCL|File::TRUNC|File::WRONLY,&block) rescue Errno::EEXIST desc = File.symlink?(file) ? "symlink to #{File.readlink(file)}" : File.stat(file).ftype puts "Warning: #{file} was apparently created by another process (as" puts "a #{desc}) as soon as it was deleted by this process. Someone may be trying" puts "to do something objectionable (such as tricking you into overwriting system" puts "files if you are running as root)." raise end end module_function :secure_open end end require 'puppet/util/errors' require 'puppet/util/methodhelper' require 'puppet/util/metaid' require 'puppet/util/classgen' require 'puppet/util/docs' require 'puppet/util/execution' require 'puppet/util/logging' require 'puppet/util/package' require 'puppet/util/warnings' diff --git a/spec/unit/util_spec.rb b/spec/unit/util_spec.rb old mode 100644 new mode 100755 index 26a9bd7f6..8644c9bf6 --- a/spec/unit/util_spec.rb +++ b/spec/unit/util_spec.rb @@ -1,335 +1,340 @@ #!/usr/bin/env ruby require 'spec_helper' describe Puppet::Util do + def process_status(exitstatus) + return exitstatus if Puppet.features.microsoft_windows? + + stub('child_status', :exitstatus => exitstatus) + end + describe "#absolute_path?" do it "should default to the platform of the local system" do Puppet.features.stubs(:posix?).returns(true) Puppet.features.stubs(:microsoft_windows?).returns(false) Puppet::Util.should be_absolute_path('/foo') Puppet::Util.should_not be_absolute_path('C:/foo') Puppet.features.stubs(:posix?).returns(false) Puppet.features.stubs(:microsoft_windows?).returns(true) Puppet::Util.should be_absolute_path('C:/foo') Puppet::Util.should_not be_absolute_path('/foo') end describe "when using platform :posix" do %w[/ /foo /foo/../bar //foo //Server/Foo/Bar //?/C:/foo/bar /\Server/Foo].each do |path| it "should return true for #{path}" do Puppet::Util.should be_absolute_path(path, :posix) end end %w[. ./foo \foo C:/foo \\Server\Foo\Bar \\?\C:\foo\bar \/?/foo\bar \/Server/foo].each do |path| it "should return false for #{path}" do Puppet::Util.should_not be_absolute_path(path, :posix) end end end describe "when using platform :windows" do %w[C:/foo C:\foo \\\\Server\Foo\Bar \\\\?\C:\foo\bar //Server/Foo/Bar //?/C:/foo/bar /\?\C:/foo\bar \/Server\Foo/Bar].each do |path| it "should return true for #{path}" do Puppet::Util.should be_absolute_path(path, :windows) end end %w[/ . ./foo \foo /foo /foo/../bar //foo C:foo/bar].each do |path| it "should return false for #{path}" do Puppet::Util.should_not be_absolute_path(path, :windows) end end end end describe "execution methods" do let(:pid) { 5501 } let(:null_file) { Puppet.features.microsoft_windows? ? 'NUL' : '/dev/null' } describe "#execute_posix" do before :each do # Most of the things this method does are bad to do during specs. :/ Kernel.stubs(:fork).returns(pid).yields Process.stubs(:setsid) Kernel.stubs(:exec) Puppet::Util::SUIDManager.stubs(:change_user) Puppet::Util::SUIDManager.stubs(:change_group) $stdin.stubs(:reopen) $stdout.stubs(:reopen) $stderr.stubs(:reopen) @stdin = File.open(null_file, 'r') @stdout = Tempfile.new('stdout') @stderr = File.open(null_file, 'w') end it "should fork a child process to execute the command" do Kernel.expects(:fork).returns(pid).yields Kernel.expects(:exec).with('test command') Puppet::Util.execute_posix('test command', {}, @stdin, @stdout, @stderr) end it "should start a new session group" do Process.expects(:setsid) Puppet::Util.execute_posix('test command', {}, @stdin, @stdout, @stderr) end it "should close all open file descriptors except stdin/stdout/stderr" do # This is ugly, but I can't really think of a better way to do it without # letting it actually close fds, which seems risky (0..2).each {|n| IO.expects(:new).with(n).never} (3..256).each {|n| IO.expects(:new).with(n).returns mock('io', :close) } Puppet::Util.execute_posix('test command', {}, @stdin, @stdout, @stderr) end it "should permanently change to the correct user and group if specified" do Puppet::Util::SUIDManager.expects(:change_group).with(55, true) Puppet::Util::SUIDManager.expects(:change_user).with(50, true) Puppet::Util.execute_posix('test command', {:uid => 50, :gid => 55}, @stdin, @stdout, @stderr) end it "should exit failure if there is a problem execing the command" do Kernel.expects(:exec).with('test command').raises("failed to execute!") Puppet::Util.stubs(:puts) Puppet::Util.expects(:exit!).with(1) Puppet::Util.execute_posix('test command', {}, @stdin, @stdout, @stderr) end it "should properly execute commands specified as arrays" do Kernel.expects(:exec).with('test command', 'with', 'arguments') Puppet::Util.execute_posix(['test command', 'with', 'arguments'], {:uid => 50, :gid => 55}, @stdin, @stdout, @stderr) end it "should return the pid of the child process" do Puppet::Util.execute_posix('test command', {}, @stdin, @stdout, @stderr).should == pid end end describe "#execute_windows" do let(:proc_info_stub) { stub 'processinfo', :process_id => pid } before :each do Process.stubs(:create).returns(proc_info_stub) - Process.stubs(:waitpid2).with(pid).returns([pid, 0]) + Process.stubs(:waitpid2).with(pid).returns([pid, process_status(0)]) @stdin = File.open(null_file, 'r') @stdout = Tempfile.new('stdout') @stderr = File.open(null_file, 'w') end it "should create a new process for the command" do Process.expects(:create).with( :command_line => "test command", :startup_info => {:stdin => @stdin, :stdout => @stdout, :stderr => @stderr} ).returns(proc_info_stub) Puppet::Util.execute_windows('test command', {}, @stdin, @stdout, @stderr) end it "should return the pid of the child process" do Puppet::Util.execute_windows('test command', {}, @stdin, @stdout, @stderr).should == pid end it "should quote arguments containing spaces if command is specified as an array" do Process.expects(:create).with do |args| args[:command_line] == '"test command" with some "arguments \"with spaces"' end.returns(proc_info_stub) Puppet::Util.execute_windows(['test command', 'with', 'some', 'arguments "with spaces'], {}, @stdin, @stdout, @stderr) end end describe "#execute" do before :each do - Process.stubs(:waitpid2).with(pid).returns([pid, 0]) + Process.stubs(:waitpid2).with(pid).returns([pid, process_status(0)]) end describe "when an execution stub is specified" do before :each do Puppet::Util::ExecutionStub.set do |command,args,stdin,stdout,stderr| "execution stub output" end end it "should call the block on the stub" do Puppet::Util.execute("/usr/bin/run_my_execute_stub").should == "execution stub output" end it "should not actually execute anything" do Puppet::Util.expects(:execute_posix).never Puppet::Util.expects(:execute_windows).never Puppet::Util.execute("/usr/bin/run_my_execute_stub") end end describe "when setting up input and output files" do include PuppetSpec::Files let(:executor) { Puppet.features.microsoft_windows? ? 'execute_windows' : 'execute_posix' } before :each do Puppet::Util.stubs(:wait_for_output) end it "should set stdin to the stdinfile if specified" do input = tmpfile('stdin') FileUtils.touch(input) Puppet::Util.expects(executor).with do |_,_,stdin,_,_| stdin.path == input end.returns(pid) Puppet::Util.execute('test command', :stdinfile => input) end it "should set stdin to the null file if not specified" do Puppet::Util.expects(executor).with do |_,_,stdin,_,_| stdin.path == null_file end.returns(pid) Puppet::Util.execute('test command') end describe "when squelch is set" do it "should set stdout and stderr to the null file" do Puppet::Util.expects(executor).with do |_,_,_,stdout,stderr| stdout.path == null_file and stderr.path == null_file end.returns(pid) Puppet::Util.execute('test command', :squelch => true) end end describe "when squelch is not set" do it "should set stdout to a temporary output file" do outfile = Tempfile.new('stdout') Tempfile.stubs(:new).returns(outfile) Puppet::Util.expects(executor).with do |_,_,_,stdout,_| stdout.path == outfile.path end.returns(pid) Puppet::Util.execute('test command', :squelch => false) end it "should set stderr to the same file as stdout if combine is true" do outfile = Tempfile.new('stdout') Tempfile.stubs(:new).returns(outfile) Puppet::Util.expects(executor).with do |_,_,_,stdout,stderr| stdout.path == outfile.path and stderr.path == outfile.path end.returns(pid) Puppet::Util.execute('test command', :squelch => false, :combine => true) end it "should set stderr to the null device if combine is false" do outfile = Tempfile.new('stdout') Tempfile.stubs(:new).returns(outfile) Puppet::Util.expects(executor).with do |_,_,_,stdout,stderr| stdout.path == outfile.path and stderr.path == null_file end.returns(pid) Puppet::Util.execute('test command', :squelch => false, :combine => false) end end end end describe "after execution" do let(:executor) { Puppet.features.microsoft_windows? ? 'execute_windows' : 'execute_posix' } + before :each do - Process.stubs(:waitpid2).with(pid).returns([pid, 0]) + Process.stubs(:waitpid2).with(pid).returns([pid, process_status(0)]) Puppet::Util.stubs(executor).returns(pid) end it "should wait for the child process to exit" do Puppet::Util.stubs(:wait_for_output) - Process.expects(:waitpid2).with(pid).returns([pid, 0]) + Process.expects(:waitpid2).with(pid).returns([pid, process_status(0)]) Puppet::Util.execute('test command') end it "should close the stdin/stdout/stderr files used by the child" do stdin = mock 'file', :close stdout = mock 'file', :close stderr = mock 'file', :close File.expects(:open). times(3). returns(stdin). then.returns(stdout). then.returns(stderr) Puppet::Util.execute('test command', :squelch => true) end it "should read and return the output if squelch is false" do stdout = Tempfile.new('test') Tempfile.stubs(:new).returns(stdout) stdout.write("My expected command output") Puppet::Util.execute('test command').should == "My expected command output" end it "should not read the output if squelch is true" do stdout = Tempfile.new('test') Tempfile.stubs(:new).returns(stdout) stdout.write("My expected command output") Puppet::Util.execute('test command', :squelch => true).should == nil end it "should delete the file used for output if squelch is false" do stdout = Tempfile.new('test') path = stdout.path Tempfile.stubs(:new).returns(stdout) Puppet::Util.execute('test command') File.should_not be_exist(path) end it "should raise an error if failonfail is true and the child failed" do - child_status = stub('child_status', :exitstatus => 1) - - Process.expects(:waitpid2).with(pid).returns([pid, child_status]) + Process.expects(:waitpid2).with(pid).returns([pid, process_status(1)]) expect { Puppet::Util.execute('fail command', :failonfail => true) }.to raise_error(Puppet::ExecutionFailure, /Execution of 'fail command' returned 1/) end it "should not raise an error if failonfail is false and the child failed" do - Process.expects(:waitpid2).with(pid).returns([pid, 1]) + Process.expects(:waitpid2).with(pid).returns([pid, process_status(1)]) expect { Puppet::Util.execute('fail command', :failonfail => false) }.not_to raise_error end it "should not raise an error if failonfail is true and the child succeeded" do - Process.expects(:waitpid2).with(pid).returns([pid, 0]) + Process.expects(:waitpid2).with(pid).returns([pid, process_status(0)]) expect { Puppet::Util.execute('fail command', :failonfail => true) }.not_to raise_error end end end end