Not quite. 

use strict;
use warnings;

use Fcntl qw( F_SETFL O_NONBLOCK );

my $fh = \*STDIN;
fcntl($fh, F_SETFL, O_NONBLOCK) || die "$!\n"; 
sysread($fh, my $buf, 1);

[download]
Your vendor has not defined Fcntl macro F_SETFL, used at ...

[download]

Similarly, $fh->blocking(0); is a no-op.

Like I said earlier, as far as I know, it's impossible to detect whether the pipe has data waiting.

In reply to Re^9: Please suggest a non-forking way to do this (OS: windows) by ikegami
in thread Please suggest a non-forking way to do this (OS: windows) by cranky

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