}
			if !equal(pwd, d) {
				fd.Close()
				t.Fatalf("Getwd returned %q want %q", pwd, d)
			}
		}
	}
	fd.Close()
}

// Test that Chdir+Getwd is program-wide.
func TestProgWideChdir(t *testing.T) {
	const N = 10
	var wg sync.WaitGroup
	hold := make(chan struct{})
	done := make(chan struct{})

	d := t.TempDir()
	oldwd, err := Getwd()
	if err != nil {