Re: Launch a user-process from daemon
Re: Launch a user-process from daemon
- Subject: Re: Launch a user-process from daemon
- From: Rakesh Singhal <email@hidden>
- Date: Thu, 22 Jan 2009 00:40:29 +0530
Hi Shawn,
Thanks. Yes, you are right and I know it is not supported and I have
written the agent to launch GUI. But this agents gets terminated when
logs out, so this will not resolve the issue of getting error -10810.
Regards
rksinghal
On Thu, Jan 22, 2009 at 12:34 AM, Shawn Erickson <email@hidden> wrote:
> On Wed, Jan 21, 2009 at 9:59 AM, Rakesh Singhal
> <email@hidden> wrote:
>> I want to launch a GUI from daemon, when it gets device plugged-in
>> notification. I observed following things while working on 10.4.11 ppc
>> and 10.5.4 intel:
>>
>> 1. The daemon launches the GUI on 10.4.11 ppc when I start the system.
>> Now if I log out and logs in and plug-in device again then it gives
>> error -10810. I could not understand that why does this error come and
>> how to resolve this.
>
> Having a daemon launch a GUI application is not supported. It may work
> by chance under certain situations but it simply is not supported.
>
>> 2. If I first log in as root user and daemon launches the GUI. Now I
>> close the GUI and switch to another user. Now if daemon launches the
>> GUI then it gets launched in root user, not in current user. It shows
>> same behaviour with all users.
>
> Again what you are doing isn't supported.
>
> You should consider using a launch agent configured to run in aqua
> sessions. This launch agent will get run when a user logs into a
> graphical session and terminated when they logout. It should contact
> your daemon and decide if it needs to show UI to the user. Basically
> launch agents can "up" communicate with launch daemons (this is the
> supported way).
>
> Read carefully... <http://developer.apple.com/technotes/tn2005/tn2083.html>
>
> -Shawn
>
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