Avoid keyctl purge in keyring ccache tests

keyctl purge was added in keyutils 1.5 (released in March 2011).  Use
keyctl unlink to clean up keys instead, as it is more universal.

ticket: 7810
target_version: 1.12.1
tags: pullup

1 files changed, 12 insertions, 8 deletions

diff --git a/src/tests/t_ccache.py b/src/tests/t_ccache.py
index eedd29af8..dd20e1139 100644
--- a/src/tests/t_ccache.py
+++ b/src/tests/t_ccache.py
@@ -85,13 +85,20 @@ def collection_test(realm, ccname):
 
 collection_test(realm, 'DIR:' + os.path.join(realm.testdir, 'cc'))
 if test_keyring:
+    def cleanup_keyring(anchor, name):
+        out = realm.run(['keyctl', 'list', anchor])
+        if ('keyring: ' + name + '\n') in out:
+            keyid = realm.run(['keyctl', 'search', anchor, 'keyring', name])
+            realm.run(['keyctl', 'unlink', keyid.strip(), anchor])
+
     # Use realm.testdir as the collection name to avoid conflicts with
     # other build trees.
     cname = realm.testdir
+    col_ringname = '_krb_' + cname
 
-    realm.run([keyctl, 'purge', 'keyring', '_krb_' + cname])
+    cleanup_keyring('@s', col_ringname)
     collection_test(realm, 'KEYRING:session:' + cname)
-    realm.run([keyctl, 'purge', 'keyring', '_krb_' + cname])
+    cleanup_keyring('@s', col_ringname)
 
     # Test legacy keyring cache linkage.
     realm.env['KRB5CCNAME'] = 'KEYRING:' + cname
@@ -108,12 +115,10 @@ if test_keyring:
     # Remove the collection keyring.  When the collection is
     # reinitialized, the legacy cache should reappear inside it
     # automatically as the primary cache.
-    out = realm.run([keyctl, 'purge', 'keyring', '_krb_' + cname])
-    if 'purged 1 keys' not in out:
-        fail('Could not purge collection keyring')
+    cleanup_keyring('@s', col_ringname)
     out = realm.run([klist])
     if realm.user_princ not in out:
-        fail('Cannot see legacy cache after purging collection')
+        fail('Cannot see legacy cache after removing collection')
     coll_id = realm.run([keyctl, 'search', '@s', 'keyring', '_krb_' + cname])
     out = realm.run([keyctl, 'list', coll_id.strip()])
     if (id.strip() + ':') not in out:
@@ -121,8 +126,7 @@ if test_keyring:
     # Destroy the cache and check that it is unlinked from the session keyring.
     realm.run([kdestroy])
     realm.run([keyctl, 'search', '@s', 'keyring', cname], expected_code=1)
-    # Clean up the collection key.
-    realm.run([keyctl, 'purge', 'keyring', '_krb_' + cname])
+    cleanup_keyring('@s', col_ringname)
 
 # Test parameter expansion in default_ccache_name
 realm.stop()