::mktmpdir creates a temporary directory.

The directory is created with 0700 permission. Application should not change the permission to make the temporary directory accessible from other users.

The prefix and suffix of the name of the directory is specified by the optional first argument, prefix_suffix.

• If it is not specified or nil, “d” is used as the prefix and no suffix is used.

• If it is a string, it is used as the prefix and no suffix is used.

• If it is an array, first element is used as the prefix and second element is used as a suffix.

Dir.mktmpdir {|dir| dir is ".../d..." }
Dir.mktmpdir("foo") {|dir| dir is ".../foo..." }
Dir.mktmpdir(["foo", "bar"]) {|dir| dir is ".../foo...bar" }

The directory is created under ::tmpdir or the optional second argument tmpdir if non-nil value is given.

Dir.mktmpdir {|dir| dir is "#{Dir.tmpdir}/d..." }
Dir.mktmpdir(nil, "/var/tmp") {|dir| dir is "/var/tmp/d..." }

If a block is given, it is yielded with the path of the directory. The directory and its contents are removed using FileUtils.remove_entry before ::mktmpdir returns. The value of the block is returned.

Dir.mktmpdir {|dir|
  # use the directory...
  open("#{dir}/foo", "w") { ... }
}

If a block is not given, The path of the directory is returned. In this case, ::mktmpdir doesn’t remove the directory.

dir = Dir.mktmpdir
begin
  # use the directory...
  open("#{dir}/foo", "w") { ... }
ensure
  # remove the directory.
  FileUtils.remove_entry dir
end

 
               # File tmpdir.rb, line 85
def Dir.mktmpdir(prefix_suffix=nil, *rest)
  path = Tmpname.create(prefix_suffix || "d", *rest) {|n| mkdir(n, 0700)}
  if block_given?
    begin
      yield path
    ensure
      stat = File.stat(File.dirname(path))
      if stat.world_writable? and !stat.sticky?
        raise ArgumentError, "parent directory is world writable but not sticky"
      end
      FileUtils.remove_entry path
    end
  else
    path
  end
end
            

Returns the operating system’s temporary file path.

 
               # File tmpdir.rb, line 21
def self.tmpdir
  if $SAFE > 0
    @@systmpdir.dup
  else
    tmp = nil
    [ENV['TMPDIR'], ENV['TMP'], ENV['TEMP'], @@systmpdir, '/tmp', '.'].each do |dir|
      next if !dir
      dir = File.expand_path(dir)
      if stat = File.stat(dir) and stat.directory? and stat.writable? and
          (!stat.world_writable? or stat.sticky?)
        tmp = dir
        break
      end rescue nil
    end
    raise ArgumentError, "could not find a temporary directory" unless tmp
    tmp
  end
end