After I check system log, found that "relaunch issue" is caused by UEM/MDM.
=> The 'mdmclient' reinstalls my application, scripts will kill the running program.
<<MDM reinstall>> 15:00:18.512454 mdmclient Processing install phase 1 for…
<<Relaunch App>> 15:00:26.596707 MobileIron Authenticate void checkArguments(NSArray<NSString *> *__strong)
<<Relaunch Daemon>> 15:00:26.626379 MiDaemon int main(int, const char **) [DAEMON] main (without UI)
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Another issue - 「App started by the system cannot find the Certificate in the Keychain」
I still don’t know why, but found a solution.
Just use 'SecKeychainOpen' to open the user keychain file (~/Library/Keychains/login.keychain-db), and it can be used normally.
Eddie Hua
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Supplement 2:
I use the following API to get the keychain search list.
When my app is restarted by the system, "Domain User Search List" is empty.
So I can't find Certificate.
CFArrayRef debugSearchList = NULL;
OSStatus debugStatus = SecKeychainCopySearchList(&debugSearchList);
LOGD(@"[DEBUG] %d CopySearchList = %@", debugStatus, debugSearchList);
CFArrayRef searchList = NULL;
OSStatus statusDomainUser = SecKeychainCopyDomainSearchList(kSecPreferencesDomainUser, &searchList);
LOGD(@"Copy kSecPreferencesDomainUser SearchList (%d) = %@", statusDomainUser, searchList);
Normal
[DEBUG] 0 CopySearchList = (
"<SecKeychain 0x7f99b7d28280 [0x7fff8076db70]>",
"<SecKeychain 0x7f99b7d289b0 [0x7fff8076db70]>",
"<SecKeychain 0x7f99b7d291f0 [0x7fff8076db70]>"
)
Copy kSecPreferencesDomainUser SearchList = (
"<SecKeychain 0x7f99b7d28280 [0x7fff8076db70]>"
)
Restarted by the system
[DEBUG] 0 CopySearchList = (
"<SecKeychain 0x7fac7f529190 [0x7fff8076db70]>",
"<SecKeychain 0x7fac7f5298c0 [0x7fff8076db70]>"
)
Copy kSecPreferencesDomainUser SearchList = (
)
Supplement:
My application includes MacApp(UI) and XPC Daemon.
MacApp and XPC Daemon will be restarted by the system at the same time.
I did more tests:
[Test A] Manually unload XPC Daemon
After a long time, XPC Daemon is still activated by system. When Daemon is restarted, MacApp will also be restarted by the system...
Then MacApp can’t found the certificate.😢
[Test B] Create another App, only timed query certificate.
It will not be restarted, so the certificate can be found.✅