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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)
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laanwj committed Feb 24, 2016
2 parents a08c41d + f22f14c commit 8b958ab15b8c187dd2041575f7115cbac7591166
Showing with 25 additions and 9 deletions.
  1. +13 −0 doc/
  2. +12 −9 src/bitcoin-cli.cpp
@@ -8,6 +8,19 @@ Example item
bitcoin-cli: arguments privacy
The RPC command line client gained a new argument, `-stdin`
to read extra arguments from standard input, one per line until EOF/Ctrl-D.
For example:
$ echo -e "mysecretcode\n120" | src/bitcoin-cli -stdin walletpassphrase
It is recommended to use this for sensitive information such as wallet
passphrases, as command-line arguments can usually be read from the process
table by any user on the system.
0.13.0 Change log
@@ -43,6 +43,7 @@ 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;
@@ -232,15 +233,17 @@ int CommandLineRPC(int argc, char *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))
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);

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