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# frozen_string_literal: true # # tmpdir - retrieve temporary directory path # # $Id: tmpdir.rb 62995 2018-03-28 10:29:15Z usa $ # require 'fileutils' begin require 'etc.so' rescue LoadError # rescue LoadError for miniruby end class Dir @@systmpdir ||= defined?(Etc.systmpdir) ? Etc.systmpdir : '/tmp' ## # Returns the operating system's temporary file path. 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 # Dir.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, <i>prefix_suffix</i>. # - 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 Dir.tmpdir or # the optional second argument <i>tmpdir</i> 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 Dir.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, Dir.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 # 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 module Tmpname # :nodoc: module_function def tmpdir Dir.tmpdir end def make_tmpname((prefix, suffix), n) prefix = (String.try_convert(prefix) or raise ArgumentError, "unexpected prefix: #{prefix.inspect}") prefix = prefix.delete("#{File::SEPARATOR}#{File::ALT_SEPARATOR}") suffix &&= (String.try_convert(suffix) or raise ArgumentError, "unexpected suffix: #{suffix.inspect}") suffix &&= suffix.delete("#{File::SEPARATOR}#{File::ALT_SEPARATOR}") t = Time.now.strftime("%Y%m%d") path = "#{prefix}#{t}-#{$$}-#{rand(0x100000000).to_s(36)}".dup path << "-#{n}" if n path << suffix if suffix path end def create(basename, tmpdir=nil, max_try: nil, **opts) if $SAFE > 0 and tmpdir.tainted? tmpdir = '/tmp' else tmpdir ||= tmpdir() end n = nil begin path = File.join(tmpdir, make_tmpname(basename, n)) yield(path, n, opts) rescue Errno::EEXIST n ||= 0 n += 1 retry if !max_try or n < max_try raise "cannot generate temporary name using `#{basename}' under `#{tmpdir}'" end path end end end