Merge #11710: cli: Reject arguments to -getinfo

dcfef27 cli: Reject arguments to -getinfo (Wladimir J. van der Laan)

Pull request description:

  Currently it's possible to accidentally type e.g.

      bitcoin-cli -getinfo getbalance

  and get an answer which can be confusing; the trailing arguments are just ignored.

  To avoid this, throw an error if the user provides arguments to
  `-getinfo`.

Tree-SHA512: 3603e8fa852b884d1dd3b7462db40b092fe8b3390fd4384b4ee330315d797aff711e9f62990012fd4b5a55c8678734ba8497a5488a09ee6b65cf8a99017d6eb4

src/bitcoin-cli.cpp

@@ -213,6 +213,9 @@ class GetinfoRequestHandler: public BaseRequestHandler
     /** Create a simulated `getinfo` request. */
     UniValue PrepareRequest(const std::string& method, const std::vector<std::string>& args) override
     {
+        if (!args.empty()) {
+            throw std::runtime_error("-getinfo takes no arguments");
+        }
         UniValue result(UniValue::VARR);
         result.push_back(JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO));
         result.push_back(JSONRPCRequestObj("getblockchaininfo", NullUniValue, ID_BLOCKCHAININFO));

test/functional/bitcoin_cli.py

@@ -35,8 +35,11 @@ def run_test(self):
         assert_equal(["foo", "bar"], self.nodes[0].cli('-rpcuser=%s' % user, '-stdin', '-stdinrpcpass', input=password + "\nfoo\nbar").echo())
         assert_raises_process_error(1, "incorrect rpcuser or rpcpassword", self.nodes[0].cli('-rpcuser=%s' % user, '-stdin', '-stdinrpcpass', input="foo").echo)
 
+        self.log.info("Make sure that -getinfo with arguments fails")
+        assert_raises_process_error(1, "-getinfo takes no arguments", self.nodes[0].cli('-getinfo').help)
+
         self.log.info("Compare responses from `bitcoin-cli -getinfo` and the RPCs data is retrieved from.")
-        cli_get_info = self.nodes[0].cli('-getinfo').help()
+        cli_get_info = self.nodes[0].cli().send_cli('-getinfo')
         wallet_info = self.nodes[0].getwalletinfo()
         network_info = self.nodes[0].getnetworkinfo()
         blockchain_info = self.nodes[0].getblockchaininfo()