Re: Launching a cocoa app from a print daemon
Re: Launching a cocoa app from a print daemon
- Subject: Re: Launching a cocoa app from a print daemon
- From: "Bertrand Landry-Hetu" <email@hidden>
- Date: Fri, 5 May 2006 12:10:00 -0700
Hi Stéphane,
Launching an application from a CUPS backend is a bit tricky, the cups
daemon runs outside the window server and there could be multiple
users logged in with Fast User Switching. That being said. I have
something like that working, but it fails on some machines and I
haven't found the solution yet. Anyway here is the code I use:
LSLaunchURLSpec launchSpec;
launchSpec.appURL = appURL;
launchSpec.itemURLs = postscriptFileURLs;
launchSpec.passThruParams = 0L;
launchSpec.launchFlags = kLSLaunchNoParams | kLSLaunchDontSwitch;
launchSpec.asyncRefCon = 0L;
status = LSOpenFromURLSpec(&launchSpec, NULL);
2006/5/5, Stéphane Puybareau <email@hidden>:
Hi,
I come from the printing mailing list...
I want to launch a Cocoa App (with a GUI) when a user print on a special
printer...
I've found tea4cups, and it seems to be suitable for this purpose.
Its a backend for CUPS that allow me to run command for each print.
I wrote a small Cocoa App with Xcode and i want tea4cups to launch it.
Firt, i try to launch my app with
/Application/MyApp.app/Contents/MacOS/MyApp &> /test.txt
in this case, when i print, the app say :
# cat /test.txt
2006-05-04 15:01:43.377 tea4cups[26685] No Info.plist file in
application bundle or no NSPrincipalClass in the Info.plist file, exiting
and exit
I also try to use the open command :
/usr/bin/open /Application/MyApp.app
In this case, when I print, the application bounce in the dock and quit
immediately... I don't see any crash reporter window (the crash report
level is set to Developer).
I also try to add a su -c /usr/bin/open /Application/MyApp.app $TEAUSERNAME
($TEAUSERNAME is an environment var thar contain the name of the user
who ask the print)
How can I manage to properly launch my application when I print ?
Is there a way to catch the standard output and the standard error from
MyApp when it's launched with open ?
I understand that the backend and the user may not be on the same host.
But in my case, it's not...
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