That's incorrect. \n is \x0A in Windows. The convertion \x0A to \x0D\x0A happens in the PerlIO layers, so your trick doesn't work. Proof: 

>type !.pl
my $LF = "\x0a";
print "This line ends with a linefeed" . $LF;

>perl !.pl > !

>debug !
-rcx
CX 0020
:
-d100 l20
0B25:0100  54 68 69 73 20 6C 69 6E-65 20 65 6E 64 73 20 77   This line
+ ends w
0B25:0110  69 74 68 20 61 20 6C 69-6E 65 66 65 65 64 0D 0A   ith a lin
+efeed..
-q

[download]

In reply to Re^2: Activestate open unix filehandle by ikegami
in thread Activestate open unix filehandle by cutter

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