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Date:	Thu, 06 Sep 2001 15:59:05 -0400
From:	Charles Wilson <cwilson AT ece DOT gatech DOT edu>
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To:	Christopher Murray <CJM4 AT nrc DOT gov>
CC:	cygwin AT cygwin DOT com
Subject:	Re: Some questions concerning perl and sh
References:	<sb979a38 DOT 074 AT nrcgwia DOT nrc DOT gov>

Christopher Murray wrote:
 > 1)  What is it about Activestate perl that prevents one from
 > accessing /usr/bin/perl
             ^^^^^^^^^^^^^ this is a cygwin path

 > -w (or c:/cygwin/usr/bin/perl, or
          ^^^^^^^^^^^^^^^^^^^^^^ so us this (*)

 > /cygdrive/c/usr/bin/perl) in the shebang line of the script when
   ^^^^^^^^^^^^^^^^^^^^^^^^ and this.

Active state perl CANNOT use cygwin paths -- only cygwin programs 
understand them.

(*) This LOOKS like a native path -- but it isn't.  /usr/bin is actually 
an empty directory.  Within cygwin, /bin is mounted ONTO /usr/bin.  But, 
if you use explorer, you'll see that the programs and files are ACTUALLY 
in c:/cygwin/bin.

 > the script is not in the cwd?  Is there any way around this (and
 > still use Activestate perl)?
 >
 > 2)  What is it about cygwin-ported perl that it must know about sh
 > when running "system"?  Where is sh.exe?  Is creating a link to
 > bash the only way to resolve this?

On unix/perl, "system" means "use the shell to execute the following 
command".  Thus, you need a shell.  (Also, you should install the ash 
package; it provides /bin/sh.

--Chuck


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