> On Jan 7, 2016, at 10:14 PM, René J. V. Bertin <rjvber...@gmail.com> wrote: > > Sorvig Morten wrote: > >> Another point: Isn't there a fundamental incompatibiity between >> LaunchServices >> and QProcess? LanchServices may ‘activate’ an already running process, while >> QProcess always starts a new process.
That should be possible to be prohibited with launch flag kLSLaunchNewInstance > This is something that I think we have not yet taken into consideration. It > doesn't necessarily matter for a "startDetached" form of launching though, If you just care about starting an application and being notified when it finishes, without the need for output/input streams or PIDs, then you can probably just run “/usr/bin/open -n -W <yourappbundle>" Br, Eike > where/when you don't care if the detached process is a newly started one or > an > already running process. It should be possible to detect termination for such > a > "reused" process too (via an NSNotificationCentre), so I think one could > write a > class that behaves as the same regardless of whether the process it > interfaces > with is a newly started process or not. > > Maybe rather a QGuiProcess then? Or is OS X really the only OS where there > exists a specific spawning API for GUI apps in addition to a more traditional > Posix one? > > NB: a contact at Apple taught me 2 things in this context: > - app bundle executables may not always start through system() or exec() in > the > future (which will probably force a redesign of QProcess) > - even in cases where fork+exec is appropriate, one should rather use > posix_spawn(). (This would concern shell scripts, non gui apps or "agents" > that > should remain in the background until they decide otherwise themselves, etc.) > > R. > > _______________________________________________ > Development mailing list > Development@qt-project.org > http://lists.qt-project.org/mailman/listinfo/development -- Eike Ziller, Principle Software Engineer - The Qt Company GmbH The Qt Company GmbH, Rudower Chaussee 13, D-12489 Berlin Geschäftsführer: Mika Pälsi, Juha Varelius, Tuula Haataja Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
