Re: Starting as Startup Item?

FROM : Sean McBride
DATE : Sat Dec 11 18:45:25 2004

Mark Munz (<email_removed>) on Sun, Dec 5, 2004 1:19 PM said:

>> You can check the loginwindow.plist file, and see if your application 
>> is listed there.  This code should do it.  Note that the autolaunched 

>
>I don't know the reason you need to know the difference between 
>starting up as a login or not, but be careful, because this solution 
>will only "mostly" work.


(Sorry for my late reply, I am 700 messages behind. :()


I have found a reliable way to make the distinction, through
experimentation.  This works for me, but I don't think its officially
documented, nor does there seem to be any official way, so....


+ (BOOL)wasLaunchedAsLoginItem
{
   // If the launching process was 'loginwindow', we were launched as a
login item
   return [self wasLaunchedByProcess:@"lgnw"];
}

+ (BOOL)wasLaunchedByProcess:(NSString*)creator
{
   BOOL    wasLaunchedByProcess = NO;

   // Get our PSN
   OSStatus    err;
ProcessSerialNumber    currPSN;
err = GetCurrentProcess (&currPSN);
   if (!err) {
       // Get information about our process
       NSDictionary*    currDict = (NSDiction
ary*)ProcessInformationCopyDictionary (&currPSN,
kProcessDictionaryIncludeAllInformationMask);
       
       // Get the PSN of the app that *launched* us.  Its not really the
parent app, in the unix sense.
       long long    temp = [[currDict objectForKey:@"ParentPSN"] longLongValue];
       [currDict release];
       ProcessSerialNumber    parentPSN = {(temp >> 32) & 0x00000000FFFFFFFFLL,
(temp >> 0) & 0x00000000FFFFFFFFLL};

       // Get info on the launching process
       NSDictionary*    parentDict = (NSDicti
onary*)ProcessInformationCopyDictionary (&parentPSN,
kProcessDictionaryIncludeAllInformationMask);
       
       // Test the creator code of the launching app
       wasLaunchedByProcess = [[parentDict objectForKey:@"FileCreator"]
isEqualToString:creator];
       [parentDict release];
   }
   
   return wasLaunchedByProcess;
}


--
____________________________________________________________
Sean McBride, B. Eng                        <email_removed>
Mac Software Designer              Montréal, Québec, Canada