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Re: gracebat runs in X, but not as a system call from a perl script
- From: Igor Peshansky <pechtcha at cs dot nyu dot edu>
- To: moka at hol dot gr
- Cc: cygwin at cygwin dot com
- Date: Wed, 21 Feb 2007 11:43:50 -0500 (EST)
- Subject: Re: gracebat runs in X, but not as a system call from a perl script
- References: <1172047813.45dc07c528fc4@easymail-old.hol.gr>
- Reply-to: 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
--
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