From f1da40c876da3be115183a2fb36dba16c56290d4 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Wed, 24 Feb 2016 11:33:08 +0100
Subject: [PATCH] Merge #7550: rpc: Input-from-stdin mode for bitcoin-cli

f22f14c doc: mention bitcoin-cli -stdin in release notes (Wladimir J. van der Laan)
92bcca3 rpc: Input-from-stdin mode for bitcoin-cli (Wladimir J. van der Laan)
---
 src/dash-cli.cpp | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/dash-cli.cpp b/src/dash-cli.cpp
index 693fbf1569..c13a5b0467 100644
--- a/src/dash-cli.cpp
+++ b/src/dash-cli.cpp
@@ -41,6 +41,7 @@ std::string HelpMessageCli()
     strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcclienttimeout=<n>", strprintf(_("Timeout during HTTP requests (default: %d)"), DEFAULT_HTTP_CLIENT_TIMEOUT));
+    strUsage += HelpMessageOpt("-stdin", _("Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases)"));
 
     return strUsage;
 }
@@ -243,15 +244,17 @@ int CommandLineRPC(int argc, char *argv[])
             argc--;
             argv++;
         }
-
-        // Method
-        if (argc < 2)
-            throw runtime_error("too few parameters");
-        string strMethod = argv[1];
-
-        // Parameters default to strings
-        std::vector<std::string> strParams(&argv[2], &argv[argc]);
-        UniValue params = RPCConvertValues(strMethod, strParams);
+        std::vector<std::string> args = std::vector<std::string>(&argv[1], &argv[argc]);
+        if (GetBoolArg("-stdin", false)) {
+            // Read one arg per line from stdin and append
+            std::string line;
+            while (std::getline(std::cin,line))
+                args.push_back(line);
+        }
+        if (args.size() < 1)
+            throw runtime_error("too few parameters (need at least command)");
+        std::string strMethod = args[0];
+        UniValue params = RPCConvertValues(strMethod, std::vector<std::string>(args.begin()+1, args.end()));
 
         // Execute and handle connection failures with -rpcwait
         const bool fWait = GetBoolArg("-rpcwait", false);