From: Clifford Heath <no@...>
Date: 2010-07-22T09:30:04+09:00
Subject: Re: How to avoid black-windows using system() ?

Roger Pack wrote:
>> system( [cmd, cmd], "-background", "#000000", "-geometry", "100%%",
>> "1.jpg", "2.jpg", "3.jpg")
>> A black-window like the jpg in attachment opens itself for half a
>> second.

system uses cmd to run the command, and cmd launches a virtual-DOS
environment. It's possible (but not from Ruby, I think) to launch
cmd with no window - my team figured out how some years back - but
I'd have to search to get the details.

>> Is there a way to avoid that with Ruby ?

The only way I can think of is to change the SHELL environment
variable to designate a wrapper for cmd that sets the "no-window"
option.

Sorry it's not a solution, but I thought the pointer might help.

Clifford Heath.