http://www.perlmonks.org?node_id=850341

astroboy has asked for the wisdom of the Perl Monks concerning the following question:

Hi - is there any OS-generic way (Windows & *nix) - using a CPAN module or not - to tell from inside my script whether it's running in the foreground or the background?
  • Comment on Detecting forground and background process

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Re: Detecting forground and background process
by BrowserUk (Patriarch) on Jul 20, 2010 at 08:41 UTC

    If you are using Jenda's Win32::Deamon::Simple, then test the global $CMDLINE. If not, look at the BEGIN block in that module for how he decides whether to set it true or false.

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Re: Detecting forground and background process
by ikegami (Patriarch) on Jul 20, 2010 at 03:41 UTC
    That concept doesn't exist in Windows.
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      Ok - well for my purposes, let's say we're not running in a console. We could be called from a Win32::Daemon service. So I'm trying to determine whether I'm running in a console (or terminal session) or not. So let me rephrase, The solution doesn't need to be generic. I can just have a condition to see if I'm running on Windows or *nix, and then do the appropriate check ... but I still need to know what the check would be

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        Maybe you could check if STDIN is opened to a terminal/console: 

            if (-t STDIN) { ...

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