method

new

v1_9_1_378 - Show latest stable - 0 notes - Class: Tempfile

new(basename, *rest) public

Creates a temporary file of mode 0600 in the temporary directory, opens it with mode “w+”, and returns a Tempfile object which represents the created temporary file. A Tempfile object can be treated just like a normal File object.

The basename parameter is used to determine the name of a temporary file. If an Array is given, the first element is used as prefix string and the second as suffix string, respectively. Otherwise it is treated as prefix string.

If tmpdir is omitted, the temporary directory is determined by Dir::tmpdir provided by ‘tmpdir.rb’. When $SAFE > 0 and the given tmpdir is tainted, it uses /tmp. (Note that ENV values are tainted by default)

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# File lib/tempfile.rb, line 32
  def initialize(basename, *rest)
    # I wish keyword argument settled soon.
    if opts = Hash.try_convert(rest[-1])
      rest.pop
    end
    tmpdir = rest[0] || Dir::tmpdir
    if $SAFE > 0 and tmpdir.tainted?
      tmpdir = '/tmp'
    end

    lock = tmpname = nil
    n = failure = 0
    @@lock.synchronize {
      begin
        begin
          tmpname = File.join(tmpdir, make_tmpname(basename, n))
          lock = tmpname + '.lock'
          n += 1
        end while @@cleanlist.include?(tmpname) or
            File.exist?(lock) or File.exist?(tmpname)
        Dir.mkdir(lock)
      rescue
        failure += 1
        retry if failure < MAX_TRY
        raise "cannot generate tempfile `%s'" % tmpname
      end
    }

    @data = [tmpname]
    @clean_proc = Tempfile.callback(@data)
    ObjectSpace.define_finalizer(self, @clean_proc)

    if opts.nil?
      opts = []
    else
      opts = [opts]
    end
    @tmpfile = File.open(tmpname, File::RDWR|File::CREAT|File::EXCL, 0600, *opts)
    @tmpname = tmpname
    @@cleanlist << @tmpname
    @data[1] = @tmpfile
    @data[2] = @@cleanlist

    super(@tmpfile)

    # Now we have all the File/IO methods defined, you must not
    # carelessly put bare puts(), etc. after this.

    Dir.rmdir(lock)
  end

new

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