Merge #10447: Make bitcoind invalid argument error message specific

cd5622d Make bitcoind invalid argument error message specific (Wladimir J. van der Laan)

Tree-SHA512: 78999b9359685c4090f9a112e1d02bdddac22173f5f04600773b042acb9481ebb54d0f73d9d6d74249f845f497927a58d59de69bf33e3dccf096c3c80c7ebf6b

src/bitcoind.cpp

@@ -117,17 +117,14 @@ bool AppInit(int argc, char* argv[])
             return false;
         }
 
-        // Command-line RPC
-        bool fCommandLine = false;
-        for (int i = 1; i < argc; i++)
-            if (!IsSwitchChar(argv[i][0]) && !boost::algorithm::istarts_with(argv[i], "bitcoin:"))
-                fCommandLine = true;
-
-        if (fCommandLine)
-        {
-            fprintf(stderr, "Error: There is no RPC client functionality in bitcoind anymore. Use the bitcoin-cli utility instead.\n");
+        // Error out when loose non-argument tokens are encountered on command line
+        for (int i = 1; i < argc; i++) {
+            if (!IsSwitchChar(argv[i][0])) {
+                fprintf(stderr, "Error: Command line contains unexpected token '%s', see bitcoind -h for a list of options.\n", argv[i]);
                 exit(EXIT_FAILURE);
             }
+        }
+
         // -server defaults to true for bitcoind but not for the GUI so do this here
         SoftSetBoolArg("-server", true);
         // Set this early so that parameter interactions go to console