From: ara.t.howard@...
Date: 2006-09-29T01:19:43+09:00
Subject: Re: how to determine if pipe is given

On Fri, 29 Sep 2006 Ara.T.Howard@noaa.gov wrote:

> note that none of these are documented.  i think that's because it's 
> considered
> 'standard' bahaviour.

oh yeah - nearly forgot my favourite: curl.  it's takes about six billion bits
of information optionally on stdin

harp:~ > PAGER=cat man curl|grep -B1 -A1 stdin
               file  name  to read the data from, or - if you want curl to read
               the data from stdin.  The contents of the file must  already  be
               url-encoded.  Multiple files can also be specified. Posting data
--

               To read the file's content from stdin insted of a  file,  use  -
               where  the  file name should've been. This goes for both @ and <
--
               Specify the filename as '-' to make  curl  read  the  file  from
               stdin.

--

               Use  the file name "-" (a single dash) to use stdin instead of a
               given file.
--
               "string",  to  get  read  from  a particular file you specify it
               "@filename" and to tell curl to read the format from  stdin  you
               write "@-".




harp:~ > echo http_code | curl --write-out - http://ruby-lang.org
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>302 Found</title>
</head><body>
<h1>Found</h1>
<p>The document has moved <a href="http://www.ruby-lang.org/">here</a>.</p>
</body></html>


it's even documented - how un-unixish!  ;-)

-a
-- 
in order to be effective truth must penetrate like an arrow - and that is
likely to hurt. -- wei wu wei