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#define _POSIX_C_SOURCE 200809L

#ifdef F_DUPFD_CLOEXEC

rb_define_const(mFcntl, "F_DUPFD_CLOEXEC", INT2NUM(F_DUPFD_CLOEXEC));

#endif

require 'test/unit'

begin

require 'fcntl'

rescue LoadError

end

class TestFcntl < Test::Unit::TestCase

include Fcntl

def setup

@r, @w = IO.pipe

end

def teardown

@r.close unless @r.closed?

@w.close unless @w.closed?

end

def test_fcntl_cloexec

flags = @r.fcntl(F_GETFD)

assert_equal(0, flags & FD_CLOEXEC, "old flags=#{flags}")

fd = @r.fcntl(F_DUPFD_CLOEXEC)

assert_kind_of Integer, fd, "not integer: #{fd.inspect}"

io = IO.for_fd(fd)

flags = io.fcntl(F_GETFD)

assert_equal(FD_CLOEXEC, flags & FD_CLOEXEC, "new flags=#{flags}")

assert_nil io.close

end if defined?(F_DUPFD_CLOEXEC)

end if defined?(Fcntl)