When I tried to launch my application from non-gui process (from launch daemon) NSworkspace openApplicationAtURL failed if I tried to run it when my device on the login screen. Everything is working if someone logged in, but on the login screen I have the error
The application “TestApp” could not be launched because a miscellaneous error occurred. with code 256
NSWorkspace* workspace = [NSWorkspace sharedWorkspace];
NSWorkspaceOpenConfiguration* config = [NSWorkspaceOpenConfiguration configuration];
config.createsNewApplicationInstance = YES;
config.activates = NO;
config.promptsUserIfNeeded = NO;
config.addsToRecentItems = NO;
[workspace openApplicationAtURL: appURL
configuration: config
completionHandler:^(NSRunningApplication *app, NSError *error)
{
}];
Sometimes after the third try it works, sometimes not at all. I try to use "open" command, it works on MacOS Sequoia, but not working for operating systems below, I see this error
The application cannot be opened for an unexpected reason, error=Error Domain=RBSRequestErrorDomain Code=5 "Launch failed." UserInfo={NSLocalizedFailureReason=Launch failed., NSUnderlyingError=0x600002998120 {Error Domain=OSLaunchdErrorDomain Code=125 "Domain does not support specified action" UserInfo={NSLocalizedFailureReason=Domain does not support specified action}}}
All these problems occur only on the login screen. I'm developing screen share utility, so I need somehow to launch my application on the login screen. Could someone please help me understand what is recommended way to launch application on the login screen?
You are on the wrong path. If your program is a daemon:
-
It needs to be started by
launchd, not byNSWorkspace. -
It can’t be an app. Specifically, it mustn’t connect to the window server. See Technote 2083 Daemons and Agents for an in-depth explanation as to why not.
I'm developing screen share utility
What you need here is a pre-login agent. TN2083 talks about those, and there’s a (very old) sample: PreLoginAgents.
Creating a viable screen sharing product is tricky. It’s something I’ve discussed before a few times. Here’s some links to conversation you might find useful:
It’s likely that your product will need:
-
A container app, for interacting with the user
-
A
launchdagent to capture the screen -
A
launchddaemon for managing the network connection
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"