create temp table copytest (
	style	text,
	test 	text,
	filler	int);

insert into copytest values('DOS','abc\r\ndef',1);
insert into copytest values('Unix','abc\ndef',2);
insert into copytest values('Mac','abc\rdef',3);
insert into copytest values('esc\\ape','a\\r\\\r\\\n\\nb',4);

copy copytest to '/tmp/copytest.csv' csv;

create temp table copytest2 (like copytest);

copy copytest2 from '/tmp/copytest.csv' csv;

select * from copytest except select * from copytest2;

truncate copytest2;

copy copytest to '/tmp/copytest.csv' csv quote '\'' escape '\\';

copy copytest2 from '/tmp/copytest.csv' csv quote '\'' escape '\\';

select * from copytest except select * from copytest2;

create or replace function nice_quote(text) returns text language plperl as $$

  my $txt = shift;
  foreach ($txt) 
  {	
	s/\r/\\r/g;
	s/\n/\\n/g;
  };
  return $txt;

$$;

select nice_quote(quote_literal(style)) as style, 
       nice_quote(quote_literal(test)) as test 
from copytest;