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Detecting forground and background process

by astroboy (Chaplain)
on Jul 20, 2010 at 03:23 UTC ( #850341=perlquestion: print w/ replies, xml ) Need Help??
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
Re: Detecting forground and background process
by ikegami (Pope) on Jul 20, 2010 at 03:41 UTC
    That concept doesn't exist in Windows.

      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

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

        if (-t STDIN) { ...
Re: Detecting forground and background process
by BrowserUk (Pope) 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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