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From: Lasse <lasse AT yrk DOT dk>
Subject:  Re: Trouble Sending  Printer Codes from Perl to Printer
Date:  Fri, 01 Jul 2005 01:48:28 +0200
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Message-ID: <da1vu7$ded$1@sea.gmane.org>
References:  <42C48248 DOT 4090404 AT igc DOT org>
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David Vergin wrote:
> I'm adapting a working linux program to cygwin. The process has been 
> relatively painless except for this issue which has delayed me way past 
> deadline.
> 
> I need to output text and printer codes (which may include \000) from a 
> perl program to a printer which may be on a parallel port or a USB port. 
> In the past I have done this on linux using something like the following.
> 
>     system(qq/echo -en "$data_str" | lpr -oraw/);
>     ...or whatever
> 
> That does not work in cygwin. It would work. But on cygwin echo behaves 
> differently in a perl system() command from the way it works from the 
> bash command line.

Why would want use echo for this? Just use a piped open directly to lpr:

     open(FH, '| lpr -oraw');
     print(FH, $data_str);
     close(FH);

(Error handling left as an exercise to the reader...)

See also: http://www.google.com/search?q=perl+piped+open

-- 
/Lasse


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