X-Spam-Check-By: sourceware.org
Date: Wed, 21 Feb 2007 11:43:50 -0500 (EST)
From: Igor Peshansky <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: moka AT hol DOT gr
cc: cygwin AT cygwin DOT com
Subject: Re: gracebat runs in X, but not as a system call from a perl script
In-Reply-To: <1172047813.45dc07c528fc4@easymail-old.hol.gr>
Message-ID: <Pine.GSO.4.63.0702211138540.13824@access1.cims.nyu.edu>
References: <1172047813 DOT 45dc07c528fc4 AT easymail-old DOT hol DOT gr>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Wed, 21 Feb 2007, moka wrote:

> I do startxwin to open X and  then do
> gracebat <parameters>
> this does what I want, namely produce a jpeg file
>
> Now if I try this for a perl script(run from X)
> system(gracebat <parameters>)
>
> i.e. the exact same line that produced the right result
> I get an error.
>
> I guess the reason is that I am using the activestate perl instead of the
> cygwin
>  perl; anyway there were reasons for that, not sure if valid or not[the reason
>  was getting DBD::Oracle to work, which was a huge pain].
> So I guess "system" to perl is whatever system Activestate was installed for,
> i.e. Windows.
>  The question is:
> Is it possible to get around this?
> Can I tweak the system command so that it executes  gracebat(but
>  otherwise use Activestate, e.g.  for Oracle DBI queries?

As the package list shows (I don't have grace installed), gracebat is a
symlink.  A Windows program like ActiveState Perl will not understand
Cygwin's symlinks (nor will it run a shell script, since it uses cmd as
its shell).  The easiest thing you can do is invoke a Cygwin shell (bash,
sh, pdksh, etc) and let it run the command.  That way, no matter what the
command is (an executable, or a symlink, or a shell script), the shell
will interpret it for you and invoke it properly.

Be careful with quoting -- you may want to use the list form of
system()...
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha AT cs DOT nyu DOT edu | igor AT watson DOT ibm DOT com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Freedom is just another word for "nothing left to lose"...  -- Janis Joplin

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/