Having no keys imported is not an error

...any more than "ls" in an empty directory is. We should fix this
in 4.20 too before people start making assumptions about this behavior.

tests/rpmdb.at

@@ -196,9 +196,8 @@ runroot rpmkeys --delete 757bf69e
 runroot rpmkeys --delete eb04e625
 runroot rpmkeys --list
 ],
-[1],
-[No keys installed
-],
+[0],
+[],
 [])
 RPMTEST_CLEANUP
 

tests/rpmsigdig.at

@@ -93,14 +93,10 @@ runroot rpmkeys --delete 1964c5fc
 [])
 
 RPMTEST_CHECK([
-# XXX rpmkeys on rpmdb returns "package gpg-pubkey is not installed" with
-# and error code when no keys are present, paper over
-runroot rpmkeys --list | grep -v "No keys installed" | wc -l
-exit 0
+runroot rpmkeys --list
 ],
 [0],
-[0
-],
+[],
 [])
 RPMTEST_CLEANUP
 

tools/rpmkeys.cc

@@ -72,18 +72,12 @@ static int matchingKeys(rpmKeyring keyring, ARGV_const_t args, void * userdata,
 	    }
 	}
     } else {
-	int found = false;
 	auto iter = rpmKeyringInitIterator(keyring, 0);
 	rpmPubkey key = NULL;
 	while ((key = rpmKeyringIteratorNext(iter))) {
-	    found = true;
 	    callback(key, userdata);
 	}
 	rpmKeyringIteratorFree(iter);
-	if (!found) {
-	    rpmlog(RPMLOG_NOTICE, "No keys installed\n");
-	    ec = EXIT_FAILURE;
-	}
     }
     return ec;
 }