buggy krb5 ccache behavior and cmocka unit tests

[Christian Merten]

Hello,

1.) I encountered a few issues when using other ccache names in 
samba-tool. For example:

samba-tool user list --use-kerberos=required --use-kerberos=required 
--use-krb5-ccache=KEYRING:persistent:12345:12345

gives NT_STATUS_UNSUCCESSFUL

although klist correctly shows a ticket that is working with ldapsearch.

Also using --use-krb5-ccache=DIR gives a segmentation fault. The 
segmentation fault is thrown somewhere in the python function 
set_named_ccache patched in auth/credentials/pycredentials.c. I tried to 
track it back to the actual c code, but I stumbled upon cmocka tests. 
This leads me to my second question:

2.) How do I run cmocka unit tests? I tried make subunit-tests 
TESTS=auth.credentials.tests.test_creds but I only get: skipping subunit 
(testscenarios are not available).

Best regards
Christian

-- 
Christian Merten
PGP Key: https://keys.openpgp.org/vks/v1/by-fingerprint/904AB78A7046431E4B8E96D2D953D69721B948B3

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