I have a launch agent application written in Obj-C. The agent monitors a
socket to a kernel extension and waits for certain events. For one event I
want the agent to launch a particular Cocoa application. For another event
I want the agent to quit the Cocoa application.
The launch and quit work fine the first time but fail, with no error, each
time thereafter.
Is there some reason why a running app can execute an Apple script only
once?
Here is the exact code from the agent application:
NSString * launch = @"tell application \"MyApp\"\n launch\n end tell\n";
NSString * quit = @"tell application \"MyApp\"\n quit\n end tell\n";
if (gMyAppIsRunning == FALSE)
{
NSAppleScript * launchScript = [[NSAppleScript alloc] initWithSource:
launch];
if (launchScript != nil)
{
NSDictionary * errorDict;
NSAppleEventDescriptor * ae = [launchScript executeAndReturnError:
&errorDict];
if ([[ae stringValue] UTF8String] == NULL)
{
gMyAppIsRunning = TRUE;
}
else
{
printf( "launchScript returned: %s\n", [[ae stringValue] UTF8String]
);
}
[launchScript release];
}
else
{
printf( "launchScript failed to init\n" );
}
}
else
{
printf( "app is already running!\n" );
}
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